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添加libevent版本客户端

master
a7458969 2020-04-18 15:22:27 +08:00
parent 0777acdb1b
commit 5b62646311
48 changed files with 10388 additions and 16 deletions
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19
.idea/workspace.xml
View File

@ -12,22 +12,28 @@
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3
CMakeLists.txt
View File

@ -6,12 +6,13 @@ INCLUDE_DIRECTORIES (./)
INCLUDE_DIRECTORIES (inc)
INCLUDE_DIRECTORIES (encrypt)
INCLUDE_DIRECTORIES (pattern)
INCLUDE_DIRECTORIES (third/inc/libevent/include)
aux_source_directory(src DIRSRCS)
aux_source_directory(src/pattern PaternSrc)
add_library(General ${DIRSRCS} ${PaternSrc} src/pattern/signleton.h src/pattern/Observer.h src/pattern/stratergy.h src/pattern/adapter.h src/encrypt/base64.cpp src/encrypt/base64.h src/encrypt/aes.cpp src/encrypt/aes.h src/encrypt/rsa.cpp
src/math/BigInt.hpp src/net/TcpClient.cpp src/net/TcpClient.h)
src/math/BigInt.hpp src/net/TcpClient.cpp src/net/TcpClient.h src/net/PackageReceiver.cpp src/net/PackageReceiver.h)
set(COPYITEM inc)
file(GLOB INCLUDES ${PROJECT_SOURCE_DIR}/inc/*)
file(COPY ${INCLUDES} DESTINATION ${LIBRARY_OUTPUT_PATH}/inc

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@ -9,6 +9,7 @@ set(CMAKE_DEPENDS_CHECK_CXX
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"D:/project/c++/generallib/src/net/TcpClient.cpp" "D:/project/c++/generallib/cmake-build-debug/CMakeFiles/General.dir/src/net/TcpClient.cpp.obj"
"D:/project/c++/generallib/src/utils.cpp" "D:/project/c++/generallib/cmake-build-debug/CMakeFiles/General.dir/src/utils.cpp.obj"
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104
src/net/PackageReceiver.cpp Normal file
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@ -0,0 +1,104 @@
#include "PackageReceiver.h"
PackageReceiver::PackageReceiver()
{
mUnsortLen = 0;
}
/*
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 4 5 6 7 8
+ -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| 0x40 | 0x41 | length[3] | length[2] |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| length[1] | length[0] | verify | funcode |
包头长度16个字节
长度包含了包头 8 字节
*/
int PackageReceiver::SortPack(uint8_t * inData, uint32_t size)
{
if (nullptr == inData)
return -1;
if (mUnsortLen == 0) {
if (size < 8) { //几乎不可能出现这种情况,除非有人捣乱
memcpy(mUnsortData, inData, size);
mUnsortLen = size;
return 0;
}
if ((inData[0] != 0x40 || inData[1] != 0x41)) {
return -1;
}
uint32_t len = (inData[2] << 24 )+ (inData[3] << 16 ) +
(inData[4] << 8) + inData[5]; // 长度
if (len > size) { // 大包还需要重组
memcpy(mUnsortData, inData, size);
mUnsortLen = size;
return 0;
}
if (len < size) { //沾包
if (mObserver != nullptr) {
this->mObserver->OnTCPPackage(inData , len );
}
this->SortPack(inData + len, size - len); //下个包进去重组
}
if (len == size) { //刚刚好一包
if (mObserver != nullptr) {
this->mObserver->OnTCPPackage(inData, len );
}
}
}
// 大包情况，还有未重组的包
else {
if (mUnsortLen + size < 8) {
memcpy(mUnsortData + mUnsortLen, inData, size);
mUnsortLen = +size;
return 0;
}
if (mUnsortLen < 8) {
// 补到8为止
memcpy(mUnsortData + mUnsortLen, inData, 8 - mUnsortLen);
mUnsortLen = 8;
inData += 8 - mUnsortLen;
size -= 8 - mUnsortLen;
}
// 包头格式错误
if ((this->mUnsortData[0] != 0x40 || this->mUnsortData[1] != 0x41)) {
return -1;
}
uint32_t len = mUnsortData[2] << 24 + mUnsortData[3] << 16 + mUnsortData[4]
<< 8 + mUnsortData[0]; // 长度
if (len > size + mUnsortLen) { //大包还需要重组
memcpy(mUnsortData + mUnsortLen, inData, size);
mUnsortLen += size;
return 0;
}
if (len < size + mUnsortLen) { // 沾包的情况,说明还有其他的包
uint8_t *buf = new uint8_t[len];
memcpy(buf, mUnsortData, mUnsortLen);
memcpy(buf + mUnsortLen, inData, len - mUnsortLen);
if (nullptr != mObserver) {
this->mObserver->OnTCPPackage(buf, len);
}
free(buf);
this->SortPack(inData, size - len - mUnsortLen);
}
if (len == size + mUnsortLen) { //刚好一整包
}
}
return 0;
}
int PackageReceiver::SetObserver(PackageReceiverObserver *p)
{
if (nullptr != p) {
this->mObserver = p;
}
return 0;
}
int PackageReceiver::Clear()
{
this->mUnsortLen = 0;
return 0;
}

34
src/net/PackageReceiver.h Normal file
View File

@ -0,0 +1,34 @@
#pragma once
#include <stdint.h>
#include <memory>
#define BUFFER_MAX 1024//每个包的最大包头
typedef enum {
FUNC_C2S = 1, //客户端请求
FUNC_S2C // 服务端请求
}FUNCODE;
/*
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 4 5 6 7 8
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| 0x40 | 0x41 | length[3] | length[2] |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| length[1] | length[0] | verify | funcode |
*/
class PackageReceiver {
public:
class PackageReceiverObserver {
public:
virtual int OnTCPPackage(uint8_t *, uint16_t) { return 0; };
};
PackageReceiver();
int SortPack(uint8_t *inData,uint32_t size);
int SetObserver(PackageReceiverObserver *);
int Clear();
private:
uint8_t mUnsortData[BUFFER_MAX];
uint32_t mUnsortLen = 0;
PackageReceiverObserver *mObserver;
};

179
src/net/TcpClient.cpp
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@ -3,3 +3,182 @@
//
#include "TcpClient.h"
void conn_writecb(struct bufferevent *, void *);
void conn_readcb(struct bufferevent *, void *);
void conn_eventcb(struct bufferevent *, short, void *);
void delay(int ms);
int ThreadRun(TcpClientLibevent *p);
//conn_writecwritecb函数将在bufferevent中的output evbuffer缓冲区发送完成后被调用。
//此时evbuffer_get_length(output) = 0，说明output evbuffer缓冲区被清空。
//假设发现有10000条记录要发送出去，1次发送10000条将占用大量内存，所以，我们要分批发送
//先发送100条数据，假设每条数据为1024字节bufferevent_write(bev,buf,1024 *100);
//系统在这100条记录发送完成后将调用conn_writecbb回调函数,然后在该函数中循环发送剩下的
//数据
void conn_writecb(struct bufferevent *bev, void *user_data)
{
// struct evbuffer *output = bufferevent_get_output(bev);
// if (evbuffer_get_length(output) == 0)
// {
// printf("Output evbuffer is flushed\n");
// bufferevent_free(bev);
// }
//delay 1 second
//delay(1000);
//static int msg_num = 1;
//char reply_msg[1000] = { '\0' };
//char *str = "I receive a message from client ";
//memcpy(reply_msg, str, strlen(str));
//sprintf(reply_msg + strlen(str), "%d", msg_num);
//bufferevent_write(bev, reply_msg, strlen(reply_msg));
//msg_num++;
}
// 运行线程
int ThreadRun(TcpClientLibevent *p) {
if (nullptr != p) {
p->mStatus = TcpClientLibevent::UNCONNECTED;
int ret = p->Dispatch();
while ((p->mStatus != TcpClientLibevent::UNCONNECTED ))
{
if (p->mStatus == TcpClientLibevent::FAIL) { //连接失败,如果有设置自动重连就一直重连
p->ConnectServer();
#ifdef _WIN32
Sleep(100);
#else
//todo linux版本sleep
#endif
}
ret = p->Dispatch();
}
}
p->mStatus = TcpClientLibevent::UNCONNECTED;
return 0;
}
void conn_readcb(struct bufferevent *bev, void *user_data)
{
TcpClientLibevent *server = (TcpClientLibevent*)user_data;
struct evbuffer *input = bufferevent_get_input(bev);
size_t sz = evbuffer_get_length(input);
if (sz > 0)
{
char *msg = new char[sz];
int ret = bufferevent_read(bev, msg, sz);
printf("%s\n", msg);
server->mPack.SortPack((uint8_t *)msg, ret);
delete msg;
}
}
void conn_eventcb(struct bufferevent *bev, short events, void *user_data)
{
TcpClientLibevent *p;
p = (TcpClientLibevent *)user_data;
if (events & BEV_EVENT_EOF)
{
if (nullptr != p->mObserver)
p->mObserver->OnDisConnected();
if (p != nullptr)
p->mStatus = TcpClientLibevent::UNCONNECTED;
printf("Connection closed\n");
}
else if (events & BEV_EVENT_ERROR)
{
printf("Got an error on the connection: %s\n", strerror(errno));
if (nullptr != p->mObserver)
p->mObserver->OnDisConnected();
p->mStatus = TcpClientLibevent::FAIL;
}
else if (events & BEV_EVENT_CONNECTED)
{
printf("Connect succeed\n");
//客户端链接成功后，给服务器发送第一条消息
if (nullptr != p->mObserver)
p->mObserver->OnConnected();
if (p != nullptr)
p->mStatus = TcpClientLibevent::UNCONNECTED;
return;
}
bufferevent_free(bev);
}
void delay(int ms)
{
clock_t start = clock();
while (clock() - start < ms);
}
bool TcpClientLibevent::Connected() {
return (((mStatus != UNCONNECTED)&& (mStatus != FAIL) )?true : false);
}
TcpClientLibevent::TcpClientLibevent(std::string addrinfo, int port, TcpClientLibevent::TcpClientObserver *p) :
mObserver(nullptr),
mStatus(UNCONNECTED),
mReConnect(false)
{
memset(&mSrv, 0, sizeof(mSrv));
mSrv.sin_addr.S_un.S_addr = inet_addr(addrinfo.c_str());
mSrv.sin_family = AF_INET;
mSrv.sin_port = htons(port);
mBase = event_base_new();
if (!mBase)
{
printf("Could not initialize libevent\n");
}
#ifdef WIN32
evthread_use_windows_threads();
#else
evthread_use_pthreads();
#endif
ConnectServer();
this->mPack.SetObserver(this);
this->mThread = new thread(ThreadRun,this);
this->mObserver = p;
}
int TcpClientLibevent::ConnectServer() {
printf("connect server\r\n");
evthread_make_base_notifiable(mBase);
bev = bufferevent_socket_new(mBase, -1,
BEV_OPT_CLOSE_ON_FREE | BEV_OPT_THREADSAFE);
if (nullptr == bev) {
this->mStatus = TcpClientLibevent::FAIL;
return - 1;
}
bufferevent_setcb(bev, conn_readcb, conn_writecb, conn_eventcb, this);
int flag = bufferevent_socket_connect(bev, (struct sockaddr *)&mSrv, sizeof(mSrv));
bufferevent_enable(bev, EV_READ | EV_WRITE);
if (-1 == flag)
{
this->mStatus = TcpClientLibevent::FAIL;
bufferevent_free(bev);
bev = nullptr;
printf("Connect failed\n");
}
this->mStatus = TcpClientLibevent::CONNECTED;
return 0;
}
int TcpClientLibevent::SetReconnect(bool reconn) {
this->mReConnect = reconn;
return 0;
}
int TcpClientLibevent::SetObserver(TcpClientLibevent::TcpClientObserver *ob) {
this->mObserver = ob;
return 0;
}
int TcpClientLibevent::Dispatch() {
return event_base_dispatch(mBase);;
}

41
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@ -12,10 +12,47 @@
#include <event2/util.h>
#include <event2/event.h>
#include <event2/thread.h>
#include "PackageReceiver.h"
#include <mutex>
#include <thread>
class TcpClient {
using namespace std;
class TcpClientLibevent :public PackageReceiver::PackageReceiverObserver{
public:
typedef enum {
UNCONNECTED, // 未连接
CONNECTED, //已经连接
FAIL, // 连接失败
}Status;
class TcpClientObserver{
public:
mutex mMux;
virtual void OnConnected() { return; };
virtual void OnDisConnected() { return; };
};
TcpClientLibevent(std::string addrinfo,int port, TcpClientObserver *p);
int ConnectServer();
bool Connected();
int Dispatch();
int OnTCPPackage(uint8_t *, uint16_t);
int SetReconnect(bool);
int SetObserver(TcpClientObserver*);
Status mStatus;
PackageReceiver mPack;
TcpClientObserver *mObserver;
private:
bool mReConnect;
int sendData(void*,size_t);
struct event_base *mBase;
struct bufferevent* bev;
struct sockaddr_in mSrv;
std::thread *mThread;
mutex mLock;
};
#endif //GENERAL_TCPCLIENT_H

0
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third/inc/libevent/event.h → third/inc/libevent/include/event.h
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/*
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_BUFFER_COMPAT_H_INCLUDED_
#define EVENT2_BUFFER_COMPAT_H_INCLUDED_
#include <event2/visibility.h>
/** @file event2/buffer_compat.h
Obsolete and deprecated versions of the functions in buffer.h: provided
only for backward compatibility.
*/
/**
Obsolete alias for evbuffer_readln(buffer, NULL, EVBUFFER_EOL_ANY).
@deprecated This function is deprecated because its behavior is not correct
for almost any protocol, and also because it's wholly subsumed by
evbuffer_readln().
@param buffer the evbuffer to read from
@return pointer to a single line, or NULL if an error occurred
*/
EVENT2_EXPORT_SYMBOL
char *evbuffer_readline(struct evbuffer *buffer);
/** Type definition for a callback that is invoked whenever data is added or
removed from an evbuffer.
An evbuffer may have one or more callbacks set at a time. The order
in which they are executed is undefined.
A callback function may add more callbacks, or remove itself from the
list of callbacks, or add or remove data from the buffer. It may not
remove another callback from the list.
If a callback adds or removes data from the buffer or from another
buffer, this can cause a recursive invocation of your callback or
other callbacks. If you ask for an infinite loop, you might just get
one: watch out!
@param buffer the buffer whose size has changed
@param old_len the previous length of the buffer
@param new_len the current length of the buffer
@param arg a pointer to user data
*/
typedef void (*evbuffer_cb)(struct evbuffer *buffer, size_t old_len, size_t new_len, void *arg);
/**
Replace all callbacks on an evbuffer with a single new callback, or
remove them.
Subsequent calls to evbuffer_setcb() replace callbacks set by previous
calls. Setting the callback to NULL removes any previously set callback.
@deprecated This function is deprecated because it clears all previous
callbacks set on the evbuffer, which can cause confusing behavior if
multiple parts of the code all want to add their own callbacks on a
buffer. Instead, use evbuffer_add(), evbuffer_del(), and
evbuffer_setflags() to manage your own evbuffer callbacks without
interfering with callbacks set by others.
@param buffer the evbuffer to be monitored
@param cb the callback function to invoke when the evbuffer is modified,
or NULL to remove all callbacks.
@param cbarg an argument to be provided to the callback function
*/
EVENT2_EXPORT_SYMBOL
void evbuffer_setcb(struct evbuffer *buffer, evbuffer_cb cb, void *cbarg);
/**
Find a string within an evbuffer.
@param buffer the evbuffer to be searched
@param what the string to be searched for
@param len the length of the search string
@return a pointer to the beginning of the search string, or NULL if the search failed.
*/
EVENT2_EXPORT_SYMBOL
unsigned char *evbuffer_find(struct evbuffer *buffer, const unsigned char *what, size_t len);
/** deprecated in favor of calling the functions directly */
#define EVBUFFER_LENGTH(x) evbuffer_get_length(x)
/** deprecated in favor of calling the functions directly */
#define EVBUFFER_DATA(x) evbuffer_pullup((x), -1)
#endif

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/*
* Copyright (c) 2007-2012 Niels Provos, Nick Mathewson
* Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_BUFFEREVENT_COMPAT_H_INCLUDED_
#define EVENT2_BUFFEREVENT_COMPAT_H_INCLUDED_
#define evbuffercb bufferevent_data_cb
#define everrorcb bufferevent_event_cb
/**
Create a new bufferevent for an fd.
This function is deprecated. Use bufferevent_socket_new and
bufferevent_set_callbacks instead.
Libevent provides an abstraction on top of the regular event callbacks.
This abstraction is called a buffered event. A buffered event provides
input and output buffers that get filled and drained automatically. The
user of a buffered event no longer deals directly with the I/O, but
instead is reading from input and writing to output buffers.
Once initialized, the bufferevent structure can be used repeatedly with
bufferevent_enable() and bufferevent_disable().
When read enabled the bufferevent will try to read from the file descriptor
and call the read callback. The write callback is executed whenever the
output buffer is drained below the write low watermark, which is 0 by
default.
If multiple bases are in use, bufferevent_base_set() must be called before
enabling the bufferevent for the first time.
@deprecated This function is deprecated because it uses the current
event base, and as such can be error prone for multithreaded programs.
Use bufferevent_socket_new() instead.
@param fd the file descriptor from which data is read and written to.
This file descriptor is not allowed to be a pipe(2).
@param readcb callback to invoke when there is data to be read, or NULL if
no callback is desired
@param writecb callback to invoke when the file descriptor is ready for
writing, or NULL if no callback is desired
@param errorcb callback to invoke when there is an error on the file
descriptor
@param cbarg an argument that will be supplied to each of the callbacks
(readcb, writecb, and errorcb)
@return a pointer to a newly allocated bufferevent struct, or NULL if an
error occurred
@see bufferevent_base_set(), bufferevent_free()
*/
struct bufferevent *bufferevent_new(evutil_socket_t fd,
evbuffercb readcb, evbuffercb writecb, everrorcb errorcb, void *cbarg);
/**
Set the read and write timeout for a buffered event.
@param bufev the bufferevent to be modified
@param timeout_read the read timeout
@param timeout_write the write timeout
*/
void bufferevent_settimeout(struct bufferevent *bufev,
int timeout_read, int timeout_write);
#define EVBUFFER_READ BEV_EVENT_READING
#define EVBUFFER_WRITE BEV_EVENT_WRITING
#define EVBUFFER_EOF BEV_EVENT_EOF
#define EVBUFFER_ERROR BEV_EVENT_ERROR
#define EVBUFFER_TIMEOUT BEV_EVENT_TIMEOUT
/** macro for getting access to the input buffer of a bufferevent */
#define EVBUFFER_INPUT(x) bufferevent_get_input(x)
/** macro for getting access to the output buffer of a bufferevent */
#define EVBUFFER_OUTPUT(x) bufferevent_get_output(x)
#endif

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/*
* Copyright (c) 2009-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_BUFFEREVENT_SSL_H_INCLUDED_
#define EVENT2_BUFFEREVENT_SSL_H_INCLUDED_
/** @file event2/bufferevent_ssl.h
OpenSSL support for bufferevents.
*/
#include <event2/visibility.h>
#include <event2/event-config.h>
#include <event2/bufferevent.h>
#include <event2/util.h>
#ifdef __cplusplus
extern "C" {
#endif
/* This is what openssl's SSL objects are underneath. */
struct ssl_st;
/**
The state of an SSL object to be used when creating a new
SSL bufferevent.
*/
enum bufferevent_ssl_state {
BUFFEREVENT_SSL_OPEN = 0,
BUFFEREVENT_SSL_CONNECTING = 1,
BUFFEREVENT_SSL_ACCEPTING = 2
};
#if defined(EVENT__HAVE_OPENSSL) || defined(EVENT_IN_DOXYGEN_)
/**
Create a new SSL bufferevent to send its data over another bufferevent.
@param base An event_base to use to detect reading and writing. It
must also be the base for the underlying bufferevent.
@param underlying A socket to use for this SSL
@param ssl A SSL* object from openssl.
@param state The current state of the SSL connection
@param options One or more bufferevent_options
@return A new bufferevent on success, or NULL on failure
*/
EVENT2_EXPORT_SYMBOL
struct bufferevent *
bufferevent_openssl_filter_new(struct event_base *base,
struct bufferevent *underlying,
struct ssl_st *ssl,
enum bufferevent_ssl_state state,
int options);
/**
Create a new SSL bufferevent to send its data over an SSL * on a socket.
@param base An event_base to use to detect reading and writing
@param fd A socket to use for this SSL
@param ssl A SSL* object from openssl.
@param state The current state of the SSL connection
@param options One or more bufferevent_options
@return A new bufferevent on success, or NULL on failure.
*/
EVENT2_EXPORT_SYMBOL
struct bufferevent *
bufferevent_openssl_socket_new(struct event_base *base,
evutil_socket_t fd,
struct ssl_st *ssl,
enum bufferevent_ssl_state state,
int options);
/** Control how to report dirty SSL shutdowns.
If the peer (or the network, or an attacker) closes the TCP
connection before closing the SSL channel, and the protocol is SSL >= v3,
this is a "dirty" shutdown. If allow_dirty_shutdown is 0 (default),
this is reported as BEV_EVENT_ERROR.
If instead allow_dirty_shutdown=1, a dirty shutdown is reported as
BEV_EVENT_EOF.
(Note that if the protocol is < SSLv3, you will always receive
BEV_EVENT_EOF, since SSL 2 and earlier cannot distinguish a secure
connection close from a dirty one. This is one reason (among many)
not to use SSL 2.)
*/
EVENT2_EXPORT_SYMBOL
int bufferevent_openssl_get_allow_dirty_shutdown(struct bufferevent *bev);
EVENT2_EXPORT_SYMBOL
void bufferevent_openssl_set_allow_dirty_shutdown(struct bufferevent *bev,
int allow_dirty_shutdown);
/** Return the underlying openssl SSL * object for an SSL bufferevent. */
EVENT2_EXPORT_SYMBOL
struct ssl_st *
bufferevent_openssl_get_ssl(struct bufferevent *bufev);
/** Tells a bufferevent to begin SSL renegotiation. */
EVENT2_EXPORT_SYMBOL
int bufferevent_ssl_renegotiate(struct bufferevent *bev);
/** Return the most recent OpenSSL error reported on an SSL bufferevent. */
EVENT2_EXPORT_SYMBOL
unsigned long bufferevent_get_openssl_error(struct bufferevent *bev);
#endif
#ifdef __cplusplus
}
#endif
#endif /* EVENT2_BUFFEREVENT_SSL_H_INCLUDED_ */

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/*
* Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_BUFFEREVENT_STRUCT_H_INCLUDED_
#define EVENT2_BUFFEREVENT_STRUCT_H_INCLUDED_
/** @file event2/bufferevent_struct.h
Data structures for bufferevents. Using these structures may hurt forward
compatibility with later versions of Libevent: be careful!
@deprecated Use of bufferevent_struct.h is completely deprecated; these
structures are only exposed for backward compatibility with programs
written before Libevent 2.0 that used them.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <event2/event-config.h>
#ifdef EVENT__HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef EVENT__HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
/* For int types. */
#include <event2/util.h>
/* For struct event */
#include <event2/event_struct.h>
struct event_watermark {
size_t low;
size_t high;
};
/**
Shared implementation of a bufferevent.
This type is exposed only because it was exposed in previous versions,
and some people's code may rely on manipulating it. Otherwise, you
should really not rely on the layout, size, or contents of this structure:
it is fairly volatile, and WILL change in future versions of the code.
**/
struct bufferevent {
/** Event base for which this bufferevent was created. */
struct event_base *ev_base;
/** Pointer to a table of function pointers to set up how this
bufferevent behaves. */
const struct bufferevent_ops *be_ops;
/** A read event that triggers when a timeout has happened or a socket
is ready to read data. Only used by some subtypes of
bufferevent. */
struct event ev_read;
/** A write event that triggers when a timeout has happened or a socket
is ready to write data. Only used by some subtypes of
bufferevent. */
struct event ev_write;
/** An input buffer. Only the bufferevent is allowed to add data to
this buffer, though the user is allowed to drain it. */
struct evbuffer *input;
/** An input buffer. Only the bufferevent is allowed to drain data
from this buffer, though the user is allowed to add it. */
struct evbuffer *output;
struct event_watermark wm_read;
struct event_watermark wm_write;
bufferevent_data_cb readcb;
bufferevent_data_cb writecb;
/* This should be called 'eventcb', but renaming it would break
* backward compatibility */
bufferevent_event_cb errorcb;
void *cbarg;
struct timeval timeout_read;
struct timeval timeout_write;
/** Events that are currently enabled: currently EV_READ and EV_WRITE
are supported. */
short enabled;
};
#ifdef __cplusplus
}
#endif
#endif /* EVENT2_BUFFEREVENT_STRUCT_H_INCLUDED_ */

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/*
* Copyright (c) 2006-2007 Niels Provos <provos@citi.umich.edu>
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* The original DNS code is due to Adam Langley with heavy
* modifications by Nick Mathewson. Adam put his DNS software in the
* public domain. You can find his original copyright below. Please,
* aware that the code as part of Libevent is governed by the 3-clause
* BSD license above.
*
* This software is Public Domain. To view a copy of the public domain dedication,
* visit http://creativecommons.org/licenses/publicdomain/ or send a letter to
* Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.
*
* I ask and expect, but do not require, that all derivative works contain an
* attribution similar to:
* Parts developed by Adam Langley <agl@imperialviolet.org>
*
* You may wish to replace the word "Parts" with something else depending on
* the amount of original code.
*
* (Derivative works does not include programs which link against, run or include
* the source verbatim in their source distributions)
*/
/** @file event2/dns.h
*
* Welcome, gentle reader
*
* Async DNS lookups are really a whole lot harder than they should be,
* mostly stemming from the fact that the libc resolver has never been
* very good at them. Before you use this library you should see if libc
* can do the job for you with the modern async call getaddrinfo_a
* (see http://www.imperialviolet.org/page25.html#e498). Otherwise,
* please continue.
*
* The library keeps track of the state of nameservers and will avoid
* them when they go down. Otherwise it will round robin between them.
*
* Quick start guide:
* #include "evdns.h"
* void callback(int result, char type, int count, int ttl,
* void *addresses, void *arg);
* evdns_resolv_conf_parse(DNS_OPTIONS_ALL, "/etc/resolv.conf");
* evdns_resolve("www.hostname.com", 0, callback, NULL);
*
* When the lookup is complete the callback function is called. The
* first argument will be one of the DNS_ERR_* defines in evdns.h.
* Hopefully it will be DNS_ERR_NONE, in which case type will be
* DNS_IPv4_A, count will be the number of IP addresses, ttl is the time
* which the data can be cached for (in seconds), addresses will point
* to an array of uint32_t's and arg will be whatever you passed to
* evdns_resolve.
*
* Searching:
*
* In order for this library to be a good replacement for glibc's resolver it
* supports searching. This involves setting a list of default domains, in
* which names will be queried for. The number of dots in the query name
* determines the order in which this list is used.
*
* Searching appears to be a single lookup from the point of view of the API,
* although many DNS queries may be generated from a single call to
* evdns_resolve. Searching can also drastically slow down the resolution
* of names.
*
* To disable searching:
* 1. Never set it up. If you never call evdns_resolv_conf_parse or
* evdns_search_add then no searching will occur.
*
* 2. If you do call evdns_resolv_conf_parse then don't pass
* DNS_OPTION_SEARCH (or DNS_OPTIONS_ALL, which implies it).
*
* 3. When calling evdns_resolve, pass the DNS_QUERY_NO_SEARCH flag.
*
* The order of searches depends on the number of dots in the name. If the
* number is greater than the ndots setting then the names is first tried
* globally. Otherwise each search domain is appended in turn.
*
* The ndots setting can either be set from a resolv.conf, or by calling
* evdns_search_ndots_set.
*
* For example, with ndots set to 1 (the default) and a search domain list of
* ["myhome.net"]:
* Query: www
* Order: www.myhome.net, www.
*
* Query: www.abc
* Order: www.abc., www.abc.myhome.net
*
* Internals:
*
* Requests are kept in two queues. The first is the inflight queue. In
* this queue requests have an allocated transaction id and nameserver.
* They will soon be transmitted if they haven't already been.
*
* The second is the waiting queue. The size of the inflight ring is
* limited and all other requests wait in waiting queue for space. This
* bounds the number of concurrent requests so that we don't flood the
* nameserver. Several algorithms require a full walk of the inflight
* queue and so bounding its size keeps thing going nicely under huge
* (many thousands of requests) loads.
*
* If a nameserver loses too many requests it is considered down and we
* try not to use it. After a while we send a probe to that nameserver
* (a lookup for google.com) and, if it replies, we consider it working
* again. If the nameserver fails a probe we wait longer to try again
* with the next probe.
*/
#ifndef EVENT2_DNS_H_INCLUDED_
#define EVENT2_DNS_H_INCLUDED_
#include <event2/visibility.h>
#ifdef __cplusplus
extern "C" {
#endif
/* For integer types. */
#include <event2/util.h>
/** Error codes 0-5 are as described in RFC 1035. */
#define DNS_ERR_NONE 0
/** The name server was unable to interpret the query */
#define DNS_ERR_FORMAT 1
/** The name server was unable to process this query due to a problem with the
* name server */
#define DNS_ERR_SERVERFAILED 2
/** The domain name does not exist */
#define DNS_ERR_NOTEXIST 3
/** The name server does not support the requested kind of query */
#define DNS_ERR_NOTIMPL 4
/** The name server refuses to reform the specified operation for policy
* reasons */
#define DNS_ERR_REFUSED 5
/** The reply was truncated or ill-formatted */
#define DNS_ERR_TRUNCATED 65
/** An unknown error occurred */
#define DNS_ERR_UNKNOWN 66
/** Communication with the server timed out */
#define DNS_ERR_TIMEOUT 67
/** The request was canceled because the DNS subsystem was shut down. */
#define DNS_ERR_SHUTDOWN 68
/** The request was canceled via a call to evdns_cancel_request */
#define DNS_ERR_CANCEL 69
/** There were no answers and no error condition in the DNS packet.
* This can happen when you ask for an address that exists, but a record
* type that doesn't. */
#define DNS_ERR_NODATA 70
#define DNS_IPv4_A 1
#define DNS_PTR 2
#define DNS_IPv6_AAAA 3
#define DNS_QUERY_NO_SEARCH 1
#define DNS_OPTION_SEARCH 1
#define DNS_OPTION_NAMESERVERS 2
#define DNS_OPTION_MISC 4
#define DNS_OPTION_HOSTSFILE 8
#define DNS_OPTIONS_ALL 15
/* Obsolete name for DNS_QUERY_NO_SEARCH */
#define DNS_NO_SEARCH DNS_QUERY_NO_SEARCH
/**
* The callback that contains the results from a lookup.
* - result is one of the DNS_ERR_* values (DNS_ERR_NONE for success)
* - type is either DNS_IPv4_A or DNS_PTR or DNS_IPv6_AAAA
* - count contains the number of addresses of form type
* - ttl is the number of seconds the resolution may be cached for.
* - addresses needs to be cast according to type. It will be an array of
* 4-byte sequences for ipv4, or an array of 16-byte sequences for ipv6,
* or a nul-terminated string for PTR.
*/
typedef void (*evdns_callback_type) (int result, char type, int count, int ttl, void *addresses, void *arg);
struct evdns_base;
struct event_base;
/** Flag for evdns_base_new: process resolv.conf. */
#define EVDNS_BASE_INITIALIZE_NAMESERVERS 1
/** Flag for evdns_base_new: Do not prevent the libevent event loop from
* exiting when we have no active dns requests. */
#define EVDNS_BASE_DISABLE_WHEN_INACTIVE 0x8000
/**
Initialize the asynchronous DNS library.
This function initializes support for non-blocking name resolution by
calling evdns_resolv_conf_parse() on UNIX and
evdns_config_windows_nameservers() on Windows.
@param event_base the event base to associate the dns client with
@param flags any of EVDNS_BASE_INITIALIZE_NAMESERVERS|
EVDNS_BASE_DISABLE_WHEN_INACTIVE
@return evdns_base object if successful, or NULL if an error occurred.
@see evdns_base_free()
*/
EVENT2_EXPORT_SYMBOL
struct evdns_base * evdns_base_new(struct event_base *event_base, int initialize_nameservers);
/**
Shut down the asynchronous DNS resolver and terminate all active requests.
If the 'fail_requests' option is enabled, all active requests will return
an empty result with the error flag set to DNS_ERR_SHUTDOWN. Otherwise,
the requests will be silently discarded.
@param evdns_base the evdns base to free
@param fail_requests if zero, active requests will be aborted; if non-zero,
active requests will return DNS_ERR_SHUTDOWN.
@see evdns_base_new()
*/
EVENT2_EXPORT_SYMBOL
void evdns_base_free(struct evdns_base *base, int fail_requests);
/**
Remove all hosts entries that have been loaded into the event_base via
evdns_base_load_hosts or via event_base_resolv_conf_parse.
@param evdns_base the evdns base to remove outdated host addresses from
*/
EVENT2_EXPORT_SYMBOL
void evdns_base_clear_host_addresses(struct evdns_base *base);
/**
Convert a DNS error code to a string.
@param err the DNS error code
@return a string containing an explanation of the error code
*/
EVENT2_EXPORT_SYMBOL
const char *evdns_err_to_string(int err);
/**
Add a nameserver.
The address should be an IPv4 address in network byte order.
The type of address is chosen so that it matches in_addr.s_addr.
@param base the evdns_base to which to add the name server
@param address an IP address in network byte order
@return 0 if successful, or -1 if an error occurred
@see evdns_base_nameserver_ip_add()
*/
EVENT2_EXPORT_SYMBOL
int evdns_base_nameserver_add(struct evdns_base *base,
unsigned long int address);
/**
Get the number of configured nameservers.
This returns the number of configured nameservers (not necessarily the
number of running nameservers). This is useful for double-checking
whether our calls to the various nameserver configuration functions
have been successful.
@param base the evdns_base to which to apply this operation
@return the number of configured nameservers
@see evdns_base_nameserver_add()
*/
EVENT2_EXPORT_SYMBOL
int evdns_base_count_nameservers(struct evdns_base *base);
/**
Remove all configured nameservers, and suspend all pending resolves.
Resolves will not necessarily be re-attempted until evdns_base_resume() is called.
@param base the evdns_base to which to apply this operation
@return 0 if successful, or -1 if an error occurred
@see evdns_base_resume()
*/
EVENT2_EXPORT_SYMBOL
int evdns_base_clear_nameservers_and_suspend(struct evdns_base *base);
/**
Resume normal operation and continue any suspended resolve requests.
Re-attempt resolves left in limbo after an earlier call to
evdns_base_clear_nameservers_and_suspend().
@param base the evdns_base to which to apply this operation
@return 0 if successful, or -1 if an error occurred
@see evdns_base_clear_nameservers_and_suspend()
*/
EVENT2_EXPORT_SYMBOL
int evdns_base_resume(struct evdns_base *base);
/**
Add a nameserver by string address.
This function parses a n IPv4 or IPv6 address from a string and adds it as a
nameserver. It supports the following formats:
- [IPv6Address]:port
- [IPv6Address]
- IPv6Address
- IPv4Address:port
- IPv4Address
If no port is specified, it defaults to 53.
@param base the evdns_base to which to apply this operation
@return 0 if successful, or -1 if an error occurred
@see evdns_base_nameserver_add()
*/
EVENT2_EXPORT_SYMBOL
int evdns_base_nameserver_ip_add(struct evdns_base *base,
const char *ip_as_string);
/**
Add a nameserver by sockaddr.
**/
EVENT2_EXPORT_SYMBOL
int
evdns_base_nameserver_sockaddr_add(struct evdns_base *base,
const struct sockaddr *sa, ev_socklen_t len, unsigned flags);
struct evdns_request;
/**
Lookup an A record for a given name.
@param base the evdns_base to which to apply this operation
@param name a DNS hostname
@param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
@param callback a callback function to invoke when the request is completed
@param ptr an argument to pass to the callback function
@return an evdns_request object if successful, or NULL if an error occurred.
@see evdns_resolve_ipv6(), evdns_resolve_reverse(), evdns_resolve_reverse_ipv6(), evdns_cancel_request()
*/
EVENT2_EXPORT_SYMBOL
struct evdns_request *evdns_base_resolve_ipv4(struct evdns_base *base, const char *name, int flags, evdns_callback_type callback, void *ptr);
/**
Lookup an AAAA record for a given name.
@param base the evdns_base to which to apply this operation
@param name a DNS hostname
@param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
@param callback a callback function to invoke when the request is completed
@param ptr an argument to pass to the callback function
@return an evdns_request object if successful, or NULL if an error occurred.
@see evdns_resolve_ipv4(), evdns_resolve_reverse(), evdns_resolve_reverse_ipv6(), evdns_cancel_request()
*/
EVENT2_EXPORT_SYMBOL
struct evdns_request *evdns_base_resolve_ipv6(struct evdns_base *base, const char *name, int flags, evdns_callback_type callback, void *ptr);
struct in_addr;
struct in6_addr;
/**
Lookup a PTR record for a given IP address.
@param base the evdns_base to which to apply this operation
@param in an IPv4 address
@param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
@param callback a callback function to invoke when the request is completed
@param ptr an argument to pass to the callback function
@return an evdns_request object if successful, or NULL if an error occurred.
@see evdns_resolve_reverse_ipv6(), evdns_cancel_request()
*/
EVENT2_EXPORT_SYMBOL
struct evdns_request *evdns_base_resolve_reverse(struct evdns_base *base, const struct in_addr *in, int flags, evdns_callback_type callback, void *ptr);
/**
Lookup a PTR record for a given IPv6 address.
@param base the evdns_base to which to apply this operation
@param in an IPv6 address
@param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
@param callback a callback function to invoke when the request is completed
@param ptr an argument to pass to the callback function
@return an evdns_request object if successful, or NULL if an error occurred.
@see evdns_resolve_reverse_ipv6(), evdns_cancel_request()
*/
EVENT2_EXPORT_SYMBOL
struct evdns_request *evdns_base_resolve_reverse_ipv6(struct evdns_base *base, const struct in6_addr *in, int flags, evdns_callback_type callback, void *ptr);
/**
Cancels a pending DNS resolution request.
@param base the evdns_base that was used to make the request
@param req the evdns_request that was returned by calling a resolve function
@see evdns_base_resolve_ipv4(), evdns_base_resolve_ipv6, evdns_base_resolve_reverse
*/
EVENT2_EXPORT_SYMBOL
void evdns_cancel_request(struct evdns_base *base, struct evdns_request *req);
/**
Set the value of a configuration option.
The currently available configuration options are:
ndots, timeout, max-timeouts, max-inflight, attempts, randomize-case,
bind-to, initial-probe-timeout, getaddrinfo-allow-skew.
In versions before Libevent 2.0.3-alpha, the option name needed to end with
a colon.
@param base the evdns_base to which to apply this operation
@param option the name of the configuration option to be modified
@param val the value to be set
@return 0 if successful, or -1 if an error occurred
*/
EVENT2_EXPORT_SYMBOL
int evdns_base_set_option(struct evdns_base *base, const char *option, const char *val);
/**
Parse a resolv.conf file.
The 'flags' parameter determines what information is parsed from the
resolv.conf file. See the man page for resolv.conf for the format of this
file.
The following directives are not parsed from the file: sortlist, rotate,
no-check-names, inet6, debug.
If this function encounters an error, the possible return values are: 1 =
failed to open file, 2 = failed to stat file, 3 = file too large, 4 = out of
memory, 5 = short read from file, 6 = no nameservers listed in the file
@param base the evdns_base to which to apply this operation
@param flags any of DNS_OPTION_NAMESERVERS|DNS_OPTION_SEARCH|DNS_OPTION_MISC|
DNS_OPTION_HOSTSFILE|DNS_OPTIONS_ALL
@param filename the path to the resolv.conf file
@return 0 if successful, or various positive error codes if an error
occurred (see above)
@see resolv.conf(3), evdns_config_windows_nameservers()
*/
EVENT2_EXPORT_SYMBOL
int evdns_base_resolv_conf_parse(struct evdns_base *base, int flags, const char *const filename);
/**
Load an /etc/hosts-style file from 'hosts_fname' into 'base'.
If hosts_fname is NULL, add minimal entries for localhost, and nothing
else.
Note that only evdns_getaddrinfo uses the /etc/hosts entries.
This function does not replace previously loaded hosts entries; to do that,
call evdns_base_clear_host_addresses first.
Return 0 on success, negative on failure.
*/
EVENT2_EXPORT_SYMBOL
int evdns_base_load_hosts(struct evdns_base *base, const char *hosts_fname);
/**
Obtain nameserver information using the Windows API.
Attempt to configure a set of nameservers based on platform settings on
a win32 host. Preferentially tries to use GetNetworkParams; if that fails,
looks in the registry.
@return 0 if successful, or -1 if an error occurred
@see evdns_resolv_conf_parse()
*/
#ifdef _WIN32
EVENT2_EXPORT_SYMBOL
int evdns_base_config_windows_nameservers(struct evdns_base *);
#define EVDNS_BASE_CONFIG_WINDOWS_NAMESERVERS_IMPLEMENTED
#endif
/**
Clear the list of search domains.
*/
EVENT2_EXPORT_SYMBOL
void evdns_base_search_clear(struct evdns_base *base);
/**
Add a domain to the list of search domains
@param domain the domain to be added to the search list
*/
EVENT2_EXPORT_SYMBOL
void evdns_base_search_add(struct evdns_base *base, const char *domain);
/**
Set the 'ndots' parameter for searches.
Sets the number of dots which, when found in a name, causes
the first query to be without any search domain.
@param ndots the new ndots parameter
*/
EVENT2_EXPORT_SYMBOL
void evdns_base_search_ndots_set(struct evdns_base *base, const int ndots);
/**
A callback that is invoked when a log message is generated
@param is_warning indicates if the log message is a 'warning'
@param msg the content of the log message
*/
typedef void (*evdns_debug_log_fn_type)(int is_warning, const char *msg);
/**
Set the callback function to handle DNS log messages. If this
callback is not set, evdns log messages are handled with the regular
Libevent logging system.
@param fn the callback to be invoked when a log message is generated
*/
EVENT2_EXPORT_SYMBOL
void evdns_set_log_fn(evdns_debug_log_fn_type fn);
/**
Set a callback that will be invoked to generate transaction IDs. By
default, we pick transaction IDs based on the current clock time, which
is bad for security.
@param fn the new callback, or NULL to use the default.
NOTE: This function has no effect in Libevent 2.0.4-alpha and later,
since Libevent now provides its own secure RNG.
*/
EVENT2_EXPORT_SYMBOL
void evdns_set_transaction_id_fn(ev_uint16_t (*fn)(void));
/**
Set a callback used to generate random bytes. By default, we use
the same function as passed to evdns_set_transaction_id_fn to generate
bytes two at a time. If a function is provided here, it's also used
to generate transaction IDs.
NOTE: This function has no effect in Libevent 2.0.4-alpha and later,
since Libevent now provides its own secure RNG.
*/
EVENT2_EXPORT_SYMBOL
void evdns_set_random_bytes_fn(void (*fn)(char *, size_t));
/*
* Functions used to implement a DNS server.
*/
struct evdns_server_request;
struct evdns_server_question;
/**
A callback to implement a DNS server. The callback function receives a DNS
request. It should then optionally add a number of answers to the reply
using the evdns_server_request_add_*_reply functions, before calling either
evdns_server_request_respond to send the reply back, or
evdns_server_request_drop to decline to answer the request.
@param req A newly received request
@param user_data A pointer that was passed to
evdns_add_server_port_with_base().
*/
typedef void (*evdns_request_callback_fn_type)(struct evdns_server_request *, void *);
#define EVDNS_ANSWER_SECTION 0
#define EVDNS_AUTHORITY_SECTION 1
#define EVDNS_ADDITIONAL_SECTION 2
#define EVDNS_TYPE_A 1
#define EVDNS_TYPE_NS 2
#define EVDNS_TYPE_CNAME 5
#define EVDNS_TYPE_SOA 6
#define EVDNS_TYPE_PTR 12
#define EVDNS_TYPE_MX 15
#define EVDNS_TYPE_TXT 16
#define EVDNS_TYPE_AAAA 28
#define EVDNS_QTYPE_AXFR 252
#define EVDNS_QTYPE_ALL 255
#define EVDNS_CLASS_INET 1
/* flags that can be set in answers; as part of the err parameter */
#define EVDNS_FLAGS_AA 0x400
#define EVDNS_FLAGS_RD 0x080
/** Create a new DNS server port.
@param base The event base to handle events for the server port.
@param socket A UDP socket to accept DNS requests.
@param flags Always 0 for now.
@param callback A function to invoke whenever we get a DNS request
on the socket.
@param user_data Data to pass to the callback.
@return an evdns_server_port structure for this server port.
*/
EVENT2_EXPORT_SYMBOL
struct evdns_server_port *evdns_add_server_port_with_base(struct event_base *base, evutil_socket_t socket, int flags, evdns_request_callback_fn_type callback, void *user_data);
/** Close down a DNS server port, and free associated structures. */
EVENT2_EXPORT_SYMBOL
void evdns_close_server_port(struct evdns_server_port *port);
/** Sets some flags in a reply we're building.
Allows setting of the AA or RD flags
*/
EVENT2_EXPORT_SYMBOL
void evdns_server_request_set_flags(struct evdns_server_request *req, int flags);
/* Functions to add an answer to an in-progress DNS reply.
*/
EVENT2_EXPORT_SYMBOL
int evdns_server_request_add_reply(struct evdns_server_request *req, int section, const char *name, int type, int dns_class, int ttl, int datalen, int is_name, const char *data);
EVENT2_EXPORT_SYMBOL
int evdns_server_request_add_a_reply(struct evdns_server_request *req, const char *name, int n, const void *addrs, int ttl);
EVENT2_EXPORT_SYMBOL
int evdns_server_request_add_aaaa_reply(struct evdns_server_request *req, const char *name, int n, const void *addrs, int ttl);
EVENT2_EXPORT_SYMBOL
int evdns_server_request_add_ptr_reply(struct evdns_server_request *req, struct in_addr *in, const char *inaddr_name, const char *hostname, int ttl);
EVENT2_EXPORT_SYMBOL
int evdns_server_request_add_cname_reply(struct evdns_server_request *req, const char *name, const char *cname, int ttl);
/**
Send back a response to a DNS request, and free the request structure.
*/
EVENT2_EXPORT_SYMBOL
int evdns_server_request_respond(struct evdns_server_request *req, int err);
/**
Free a DNS request without sending back a reply.
*/
EVENT2_EXPORT_SYMBOL
int evdns_server_request_drop(struct evdns_server_request *req);
struct sockaddr;
/**
Get the address that made a DNS request.
*/
EVENT2_EXPORT_SYMBOL
int evdns_server_request_get_requesting_addr(struct evdns_server_request *req, struct sockaddr *sa, int addr_len);
/** Callback for evdns_getaddrinfo. */
typedef void (*evdns_getaddrinfo_cb)(int result, struct evutil_addrinfo *res, void *arg);
struct evdns_base;
struct evdns_getaddrinfo_request;
/** Make a non-blocking getaddrinfo request using the dns_base in 'dns_base'.
*
* If we can answer the request immediately (with an error or not!), then we
* invoke cb immediately and return NULL. Otherwise we return
* an evdns_getaddrinfo_request and invoke cb later.
*
* When the callback is invoked, we pass as its first argument the error code
* that getaddrinfo would return (or 0 for no error). As its second argument,
* we pass the evutil_addrinfo structures we found (or NULL on error). We
* pass 'arg' as the third argument.
*
* Limitations:
*
* - The AI_V4MAPPED and AI_ALL flags are not currently implemented.
* - For ai_socktype, we only handle SOCKTYPE_STREAM, SOCKTYPE_UDP, and 0.
* - For ai_protocol, we only handle IPPROTO_TCP, IPPROTO_UDP, and 0.
*/
EVENT2_EXPORT_SYMBOL
struct evdns_getaddrinfo_request *evdns_getaddrinfo(
struct evdns_base *dns_base,
const char *nodename, const char *servname,
const struct evutil_addrinfo *hints_in,
evdns_getaddrinfo_cb cb, void *arg);
/* Cancel an in-progress evdns_getaddrinfo. This MUST NOT be called after the
* getaddrinfo's callback has been invoked. The resolves will be canceled,
* and the callback will be invoked with the error EVUTIL_EAI_CANCEL. */
EVENT2_EXPORT_SYMBOL
void evdns_getaddrinfo_cancel(struct evdns_getaddrinfo_request *req);
/**
Retrieve the address of the 'idx'th configured nameserver.
@param base The evdns_base to examine.
@param idx The index of the nameserver to get the address of.
@param sa A location to receive the server's address.
@param len The number of bytes available at sa.
@return the number of bytes written into sa on success. On failure, returns
-1 if idx is greater than the number of configured nameservers, or a
value greater than 'len' if len was not high enough.
*/
EVENT2_EXPORT_SYMBOL
int evdns_base_get_nameserver_addr(struct evdns_base *base, int idx,
struct sockaddr *sa, ev_socklen_t len);
#ifdef __cplusplus
}
#endif
#endif /* !EVENT2_DNS_H_INCLUDED_ */

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/*
* Copyright (c) 2006-2007 Niels Provos <provos@citi.umich.edu>
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_DNS_COMPAT_H_INCLUDED_
#define EVENT2_DNS_COMPAT_H_INCLUDED_
/** @file event2/dns_compat.h
Potentially non-threadsafe versions of the functions in dns.h: provided
only for backwards compatibility.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <event2/event-config.h>
#ifdef EVENT__HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef EVENT__HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
/* For int types. */
#include <event2/util.h>
/**
Initialize the asynchronous DNS library.
This function initializes support for non-blocking name resolution by
calling evdns_resolv_conf_parse() on UNIX and
evdns_config_windows_nameservers() on Windows.
@deprecated This function is deprecated because it always uses the current
event base, and is easily confused by multiple calls to event_init(), and
so is not safe for multithreaded use. Additionally, it allocates a global
structure that only one thread can use. The replacement is
evdns_base_new().
@return 0 if successful, or -1 if an error occurred
@see evdns_shutdown()
*/
int evdns_init(void);
struct evdns_base;
/**
Return the global evdns_base created by event_init() and used by the other
deprecated functions.
@deprecated This function is deprecated because use of the global
evdns_base is error-prone.
*/
struct evdns_base *evdns_get_global_base(void);
/**
Shut down the asynchronous DNS resolver and terminate all active requests.
If the 'fail_requests' option is enabled, all active requests will return
an empty result with the error flag set to DNS_ERR_SHUTDOWN. Otherwise,
the requests will be silently discarded.
@deprecated This function is deprecated because it does not allow the
caller to specify which evdns_base it applies to. The recommended
function is evdns_base_shutdown().
@param fail_requests if zero, active requests will be aborted; if non-zero,
active requests will return DNS_ERR_SHUTDOWN.
@see evdns_init()
*/
void evdns_shutdown(int fail_requests);
/**
Add a nameserver.
The address should be an IPv4 address in network byte order.
The type of address is chosen so that it matches in_addr.s_addr.
@deprecated This function is deprecated because it does not allow the
caller to specify which evdns_base it applies to. The recommended
function is evdns_base_nameserver_add().
@param address an IP address in network byte order
@return 0 if successful, or -1 if an error occurred
@see evdns_nameserver_ip_add()
*/
int evdns_nameserver_add(unsigned long int address);
/**
Get the number of configured nameservers.
This returns the number of configured nameservers (not necessarily the
number of running nameservers). This is useful for double-checking
whether our calls to the various nameserver configuration functions
have been successful.
@deprecated This function is deprecated because it does not allow the
caller to specify which evdns_base it applies to. The recommended
function is evdns_base_count_nameservers().
@return the number of configured nameservers
@see evdns_nameserver_add()
*/
int evdns_count_nameservers(void);
/**
Remove all configured nameservers, and suspend all pending resolves.
Resolves will not necessarily be re-attempted until evdns_resume() is called.
@deprecated This function is deprecated because it does not allow the
caller to specify which evdns_base it applies to. The recommended
function is evdns_base_clear_nameservers_and_suspend().
@return 0 if successful, or -1 if an error occurred
@see evdns_resume()
*/
int evdns_clear_nameservers_and_suspend(void);
/**
Resume normal operation and continue any suspended resolve requests.
Re-attempt resolves left in limbo after an earlier call to
evdns_clear_nameservers_and_suspend().
@deprecated This function is deprecated because it does not allow the
caller to specify which evdns_base it applies to. The recommended
function is evdns_base_resume().
@return 0 if successful, or -1 if an error occurred
@see evdns_clear_nameservers_and_suspend()
*/
int evdns_resume(void);
/**
Add a nameserver.
This wraps the evdns_nameserver_add() function by parsing a string as an IP
address and adds it as a nameserver.
@deprecated This function is deprecated because it does not allow the
caller to specify which evdns_base it applies to. The recommended
function is evdns_base_nameserver_ip_add().
@return 0 if successful, or -1 if an error occurred
@see evdns_nameserver_add()
*/
int evdns_nameserver_ip_add(const char *ip_as_string);
/**
Lookup an A record for a given name.
@deprecated This function is deprecated because it does not allow the
caller to specify which evdns_base it applies to. The recommended
function is evdns_base_resolve_ipv4().
@param name a DNS hostname
@param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
@param callback a callback function to invoke when the request is completed
@param ptr an argument to pass to the callback function
@return 0 if successful, or -1 if an error occurred
@see evdns_resolve_ipv6(), evdns_resolve_reverse(), evdns_resolve_reverse_ipv6()
*/
int evdns_resolve_ipv4(const char *name, int flags, evdns_callback_type callback, void *ptr);
/**
Lookup an AAAA record for a given name.
@param name a DNS hostname
@param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
@param callback a callback function to invoke when the request is completed
@param ptr an argument to pass to the callback function
@return 0 if successful, or -1 if an error occurred
@see evdns_resolve_ipv4(), evdns_resolve_reverse(), evdns_resolve_reverse_ipv6()
*/
int evdns_resolve_ipv6(const char *name, int flags, evdns_callback_type callback, void *ptr);
struct in_addr;
struct in6_addr;
/**
Lookup a PTR record for a given IP address.
@deprecated This function is deprecated because it does not allow the
caller to specify which evdns_base it applies to. The recommended
function is evdns_base_resolve_reverse().
@param in an IPv4 address
@param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
@param callback a callback function to invoke when the request is completed
@param ptr an argument to pass to the callback function
@return 0 if successful, or -1 if an error occurred
@see evdns_resolve_reverse_ipv6()
*/
int evdns_resolve_reverse(const struct in_addr *in, int flags, evdns_callback_type callback, void *ptr);
/**
Lookup a PTR record for a given IPv6 address.
@deprecated This function is deprecated because it does not allow the
caller to specify which evdns_base it applies to. The recommended
function is evdns_base_resolve_reverse_ipv6().
@param in an IPv6 address
@param flags either 0, or DNS_QUERY_NO_SEARCH to disable searching for this query.
@param callback a callback function to invoke when the request is completed
@param ptr an argument to pass to the callback function
@return 0 if successful, or -1 if an error occurred
@see evdns_resolve_reverse_ipv6()
*/
int evdns_resolve_reverse_ipv6(const struct in6_addr *in, int flags, evdns_callback_type callback, void *ptr);
/**
Set the value of a configuration option.
The currently available configuration options are:
ndots, timeout, max-timeouts, max-inflight, and attempts
@deprecated This function is deprecated because it does not allow the
caller to specify which evdns_base it applies to. The recommended
function is evdns_base_set_option().
@param option the name of the configuration option to be modified
@param val the value to be set
@param flags Ignored.
@return 0 if successful, or -1 if an error occurred
*/
int evdns_set_option(const char *option, const char *val, int flags);
/**
Parse a resolv.conf file.
The 'flags' parameter determines what information is parsed from the
resolv.conf file. See the man page for resolv.conf for the format of this
file.
The following directives are not parsed from the file: sortlist, rotate,
no-check-names, inet6, debug.
If this function encounters an error, the possible return values are: 1 =
failed to open file, 2 = failed to stat file, 3 = file too large, 4 = out of
memory, 5 = short read from file, 6 = no nameservers listed in the file
@deprecated This function is deprecated because it does not allow the
caller to specify which evdns_base it applies to. The recommended
function is evdns_base_resolv_conf_parse().
@param flags any of DNS_OPTION_NAMESERVERS|DNS_OPTION_SEARCH|DNS_OPTION_MISC|
DNS_OPTIONS_ALL
@param filename the path to the resolv.conf file
@return 0 if successful, or various positive error codes if an error
occurred (see above)
@see resolv.conf(3), evdns_config_windows_nameservers()
*/
int evdns_resolv_conf_parse(int flags, const char *const filename);
/**
Clear the list of search domains.
@deprecated This function is deprecated because it does not allow the
caller to specify which evdns_base it applies to. The recommended
function is evdns_base_search_clear().
*/
void evdns_search_clear(void);
/**
Add a domain to the list of search domains
@deprecated This function is deprecated because it does not allow the
caller to specify which evdns_base it applies to. The recommended
function is evdns_base_search_add().
@param domain the domain to be added to the search list
*/
void evdns_search_add(const char *domain);
/**
Set the 'ndots' parameter for searches.
Sets the number of dots which, when found in a name, causes
the first query to be without any search domain.
@deprecated This function is deprecated because it does not allow the
caller to specify which evdns_base it applies to. The recommended
function is evdns_base_search_ndots_set().
@param ndots the new ndots parameter
*/
void evdns_search_ndots_set(const int ndots);
/**
As evdns_server_new_with_base.
@deprecated This function is deprecated because it does not allow the
caller to specify which even_base it uses. The recommended
function is evdns_add_server_port_with_base().
*/
struct evdns_server_port *evdns_add_server_port(evutil_socket_t socket, int flags, evdns_request_callback_fn_type callback, void *user_data);
#ifdef _WIN32
int evdns_config_windows_nameservers(void);
#define EVDNS_CONFIG_WINDOWS_NAMESERVERS_IMPLEMENTED
#endif
#ifdef __cplusplus
}
#endif
#endif /* EVENT2_EVENT_COMPAT_H_INCLUDED_ */

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/*
* Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_DNS_STRUCT_H_INCLUDED_
#define EVENT2_DNS_STRUCT_H_INCLUDED_
/** @file event2/dns_struct.h
Data structures for dns. Using these structures may hurt forward
compatibility with later versions of Libevent: be careful!
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <event2/event-config.h>
#ifdef EVENT__HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef EVENT__HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
/* For int types. */
#include <event2/util.h>
/*
* Structures used to implement a DNS server.
*/
struct evdns_server_request {
int flags;
int nquestions;
struct evdns_server_question **questions;
};
struct evdns_server_question {
int type;
#ifdef __cplusplus
int dns_question_class;
#else
/* You should refer to this field as "dns_question_class". The
* name "class" works in C for backward compatibility, and will be
* removed in a future version. (1.5 or later). */
int class;
#define dns_question_class class
#endif
char name[1];
};
#ifdef __cplusplus
}
#endif
#endif /* EVENT2_DNS_STRUCT_H_INCLUDED_ */

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/* event2/event-config.h
*
* This file was generated by autoconf when libevent was built, and post-
* processed by Libevent so that its macros would have a uniform prefix.
*
* DO NOT EDIT THIS FILE.
*
* Do not rely on macros in this file existing in later versions.
*/
#ifndef EVENT_CONFIG_H__
#define EVENT_CONFIG_H__
/* config.h. Generated by configure. */
/* config.h.in. Generated from configure.in by autoheader. */
/* Define if libevent should not allow replacing the mm functions */
/* #undef EVENT__DISABLE_MM_REPLACEMENT */
/* Define if libevent should not be compiled with thread support */
/* #undef EVENT__DISABLE_THREAD_SUPPORT */
/* Define if clock_gettime is available in libc */
/* #undef _EVENT_DNS_USE_CPU_CLOCK_FOR_ID */
/* Define is no secure id variant is available */
/* #define _EVENT_DNS_USE_GETTIMEOFDAY_FOR_ID 1 */
#define EVENT_DNS_USE_FTIME_FOR_ID_ 1
/* Define to 1 if you have the <arpa/inet.h> header file. */
/* #undef EVENT__HAVE_ARPA_INET_H */
/* Define to 1 if you have the `clock_gettime' function. */
/* #undef EVENT__HAVE_CLOCK_GETTIME */
/* Define if /dev/poll is available */
/* #undef EVENT__HAVE_DEVPOLL */
/* Define to 1 if you have the <dlfcn.h> header file. */
/* #undef EVENT__HAVE_DLFCN_H */
/* Define if your system supports the epoll system calls */
/* #undef EVENT__HAVE_EPOLL */
/* Define to 1 if you have the `epoll_ctl' function. */
/* #undef EVENT__HAVE_EPOLL_CTL */
/* Define to 1 if you have the `eventfd' function. */
/* #undef EVENT__HAVE_EVENTFD */
/* Define if your system supports event ports */
/* #undef EVENT__HAVE_EVENT_PORTS */
/* Define to 1 if you have the `fcntl' function. */
/* #undef EVENT__HAVE_FCNTL */
/* Define to 1 if you have the <fcntl.h> header file. */
#define EVENT__HAVE_FCNTL_H 1
/* Define to 1 if you have the `getaddrinfo' function. */
#define EVENT__HAVE_GETADDRINFO 1
/* Define to 1 if you have the `getnameinfo' function. */
#define EVENT__HAVE_GETNAMEINFO 1
/* Define to 1 if you have the `getprotobynumber' function. */
#define EVENT__HAVE_GETPROTOBYNUMBER 1
/* Define to 1 if you have the `getservbyname' function. */
#define EVENT__HAVE_GETSERVBYNAME 1
/* Define to 1 if you have the `gettimeofday' function. */
/* #define EVENT__HAVE_GETTIMEOFDAY 1 */
/* Define to 1 if you have the `inet_ntop' function. */
/* #undef EVENT__HAVE_INET_NTOP */
/* Define to 1 if you have the `inet_pton' function. */
/* #undef EVENT__HAVE_INET_PTON */
/* Define to 1 if you have the <inttypes.h> header file. */
/* #define EVENT__HAVE_INTTYPES_H 1 */
/* Define to 1 if you have the `kqueue' function. */
/* #undef EVENT__HAVE_KQUEUE */
/* Define if the system has zlib */
/* #undef EVENT__HAVE_LIBZ */
/* Define to 1 if you have the <memory.h> header file. */
#define EVENT__HAVE_MEMORY_H 1
/* Define to 1 if you have the `mmap' function. */
/* #undef EVENT__HAVE_MMAP */
/* Define to 1 if you have the <netinet/in6.h> header file. */
/* #undef EVENT__HAVE_NETINET_IN6_H */
/* Define to 1 if you have the <netinet/in.h> header file. */
/* #undef EVENT__HAVE_NETINET_IN_H */
/* Define to 1 if you have the `pipe' function. */
/* #undef EVENT__HAVE_PIPE */
/* Define to 1 if you have the `poll' function. */
/* #undef EVENT__HAVE_POLL */
/* Define to 1 if you have the <poll.h> header file. */
/* #undef EVENT__HAVE_POLL_H */
/* Define to 1 if you have the `port_create' function. */
/* #undef EVENT__HAVE_PORT_CREATE */
/* Define to 1 if you have the <port.h> header file. */
/* #undef EVENT__HAVE_PORT_H */
/* Define if you have POSIX threads libraries and header files. */
/* #undef EVENT__HAVE_PTHREAD */
/* Define if we have pthreads on this system */
/* #undef EVENT__HAVE_PTHREADS */
/* Define to 1 if the system has the type `sa_family_t'. */
/* #undef EVENT__HAVE_SA_FAMILY_T */
/* Define to 1 if you have the `select' function. */
/* #undef EVENT__HAVE_SELECT */
/* Define to 1 if you have the `sendfile' function. */
/* #undef EVENT__HAVE_SENDFILE */
/* Define if F_SETFD is defined in <fcntl.h> */
/* #undef EVENT__HAVE_SETFD */
/* Define to 1 if you have the `sigaction' function. */
/* #undef EVENT__HAVE_SIGACTION */
/* Define to 1 if you have the `signal' function. */
#define EVENT__HAVE_SIGNAL 1
/* Define to 1 if you have the `splice' function. */
/* #undef EVENT__HAVE_SPLICE */
/* Define to 1 if you have the <stdarg.h> header file. */
#define EVENT__HAVE_STDARG_H 1
/* Define to 1 if you have the <stddef.h> header file. */
#define EVENT__HAVE_STDDEF_H 1
/* Define to 1 if you have the <stdint.h> header file. */
/* #define EVENT__HAVE_STDINT_H 1 */
/* Define to 1 if you have the <stdlib.h> header file. */
#define EVENT__HAVE_STDLIB_H 1
/* Define to 1 if you have the <strings.h> header file. */
#define EVENT__HAVE_STRINGS_H 1
/* Define to 1 if you have the <string.h> header file. */
#define EVENT__HAVE_STRING_H 1
/* Define to 1 if you have the `strlcpy' function. */
/* #undef EVENT__HAVE_STRLCPY */
/* Define to 1 if you have the `strsep' function. */
/* #undef EVENT__HAVE_STRSEP */
/* Define to 1 if you have the `strtok_r' function. */
/* #undef EVENT__HAVE_STRTOK_R */
/* Define to 1 if you have the `strtoll' function. */
/* #define EVENT__HAVE_STRTOLL 1 */
#define EVENT__HAVE_STRUCT_ADDRINFO 1
/* Define to 1 if the system has the type `struct in6_addr'. */
#define EVENT__HAVE_STRUCT_IN6_ADDR 1
/* Define to 1 if `s6_addr16' is member of `struct in6_addr'. */
#define EVENT__HAVE_STRUCT_IN6_ADDR_S6_ADDR16 1
/* Define to 1 if `s6_addr32' is member of `struct in6_addr'. */
#define EVENT__HAVE_STRUCT_IN6_ADDR_S6_ADDR32 1
/* Define to 1 if the system has the type `struct sockaddr_in6'. */
#define EVENT__HAVE_STRUCT_SOCKADDR_IN6 1
/* Define to 1 if `sin6_len' is member of `struct sockaddr_in6'. */
/* #undef EVENT__HAVE_STRUCT_SOCKADDR_IN6_SIN6_LEN */
/* Define to 1 if `sin_len' is member of `struct sockaddr_in'. */
/* #undef EVENT__HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
/* Define to 1 if the system has the type `struct sockaddr_storage'. */
#define EVENT__HAVE_STRUCT_SOCKADDR_STORAGE 1
/* Define to 1 if you have the <sys/devpoll.h> header file. */
/* #undef EVENT__HAVE_SYS_DEVPOLL_H */
/* Define to 1 if you have the <sys/epoll.h> header file. */
/* #undef EVENT__HAVE_SYS_EPOLL_H */
/* Define to 1 if you have the <sys/eventfd.h> header file. */
/* #undef EVENT__HAVE_SYS_EVENTFD_H */
/* Define to 1 if you have the <sys/event.h> header file. */
/* #undef EVENT__HAVE_SYS_EVENT_H */
/* Define to 1 if you have the <sys/ioctl.h> header file. */
/* #undef EVENT__HAVE_SYS_IOCTL_H */
/* Define to 1 if you have the <sys/mman.h> header file. */
/* #undef EVENT__HAVE_SYS_MMAN_H */
/* Define to 1 if you have the <sys/param.h> header file. */
/* #define EVENT__HAVE_SYS_PARAM_H 1 */
/* Define to 1 if you have the <sys/queue.h> header file. */
/* #undef EVENT__HAVE_SYS_QUEUE_H */
/* Define to 1 if you have the <sys/select.h> header file. */
/* #undef EVENT__HAVE_SYS_SELECT_H */
/* Define to 1 if you have the <sys/sendfile.h> header file. */
/* #undef EVENT__HAVE_SYS_SENDFILE_H */
/* Define to 1 if you have the <sys/socket.h> header file. */
/* #undef EVENT__HAVE_SYS_SOCKET_H */
/* Define to 1 if you have the <sys/stat.h> header file. */
#define EVENT__HAVE_SYS_STAT_H 1
/* Define to 1 if you have the <sys/time.h> header file. */
/* #define EVENT__HAVE_SYS_TIME_H 1 */
/* Define to 1 if you have the <sys/types.h> header file. */
#define EVENT__HAVE_SYS_TYPES_H 1
/* Define to 1 if you have the <sys/uio.h> header file. */
/* #undef EVENT__HAVE_SYS_UIO_H */
/* Define if TAILQ_FOREACH is defined in <sys/queue.h> */
/* #undef EVENT__HAVE_TAILQFOREACH */
/* Define if timeradd is defined in <sys/time.h> */
/* #undef EVENT__HAVE_TIMERADD */
/* Define if timerclear is defined in <sys/time.h> */
#define EVENT__HAVE_TIMERCLEAR 1
/* Define if timercmp is defined in <sys/time.h> */
#define EVENT__HAVE_TIMERCMP 1
/* Define if timerisset is defined in <sys/time.h> */
#define EVENT__HAVE_TIMERISSET 1
/* Define to 1 if the system has the type `uint16_t'. */
/* #define EVENT__HAVE_UINT16_T 1 */
/* Define to 1 if the system has the type `uint32_t'. */
/* #define EVENT__HAVE_UINT32_T 1 */
/* Define to 1 if the system has the type `uint64_t'. */
/* #define EVENT__HAVE_UINT64_T 1 */
/* Define to 1 if the system has the type `uint8_t'. */
/* #define EVENT__HAVE_UINT8_T 1 */
/* Define to 1 if you have the <unistd.h> header file. */
/* #define EVENT__HAVE_UNISTD_H 1 */
/* Define to 1 if you have the `vasprintf' function. */
/* #undef EVENT__HAVE_VASPRINTF */
/* Define if kqueue works correctly with pipes */
/* #undef EVENT__HAVE_WORKING_KQUEUE */
/* Numeric representation of the version */
#define EVENT__NUMERIC_VERSION 0x02010800
/* Name of package */
#define EVENT__PACKAGE "libevent"
/* Define to the address where bug reports for this package should be sent. */
#define EVENT__PACKAGE_BUGREPORT ""
/* Define to the full name of this package. */
#define EVENT__PACKAGE_NAME ""
/* Define to the full name and version of this package. */
#define EVENT__PACKAGE_STRING ""
/* Define to the one symbol short name of this package. */
#define EVENT__PACKAGE_TARNAME ""
/* Define to the version of this package. */
#define EVENT__PACKAGE_VERSION ""
/* Define to necessary symbol if this constant uses a non-standard name on
your system. */
/* #undef EVENT__PTHREAD_CREATE_JOINABLE */
/* The size of a `int', as computed by sizeof. */
#define EVENT__SIZEOF_INT 4
/* The size of a `long', as computed by sizeof. */
#define EVENT__SIZEOF_LONG 4
/* The size of a `long long', as computed by sizeof. */
#define EVENT__SIZEOF_LONG_LONG 8
/* The size of a `short', as computed by sizeof. */
#define EVENT__SIZEOF_SHORT 2
/* The size of `size_t', as computed by sizeof. */
#ifdef _WIN64
#define EVENT__SIZEOF_SIZE_T 8
#else
#define EVENT__SIZEOF_SIZE_T 4
#endif
/* The size of `void *', as computed by sizeof. */
#ifdef _WIN64
#define EVENT__SIZEOF_VOID_P 8
#else
#define EVENT__SIZEOF_VOID_P 4
#endif
/* Define to 1 if you have the ANSI C header files. */
#define EVENT__STDC_HEADERS 1
/* Define to 1 if you can safely include both <sys/time.h> and <time.h>. */
#define EVENT__TIME_WITH_SYS_TIME 1
/* Version number of package */
#define EVENT__VERSION "2.1.8-stable"
/* Define to appropriate substitue if compiler doesnt have __func__ */
#define EVENT____func__ __FUNCTION__
/* Define to empty if `const' does not conform to ANSI C. */
/* #undef EVENT__const */
/* Define to `__inline__' or `__inline' if that's what the C compiler
calls it, or to nothing if 'inline' is not supported under any name. */
#ifndef _EVENT___cplusplus
#define EVENT__inline __inline
#endif
/* Define to `int' if <sys/types.h> does not define. */
/* #undef EVENT__pid_t */
/* Define to `unsigned' if <sys/types.h> does not define. */
/* #undef EVENT__size_t */
/* Define to unsigned int if you dont have it */
#define EVENT__socklen_t unsigned int
/* Define to `int' if <sys/types.h> does not define. */
#define EVENT__ssize_t SSIZE_T
#endif

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/*
* Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_EVENT_COMPAT_H_INCLUDED_
#define EVENT2_EVENT_COMPAT_H_INCLUDED_
/** @file event2/event_compat.h
Potentially non-threadsafe versions of the functions in event.h: provided
only for backwards compatibility.
In the oldest versions of Libevent, event_base was not a first-class
structure. Instead, there was a single event base that every function
manipulated. Later, when separate event bases were added, the old functions
that didn't take an event_base argument needed to work by manipulating the
"current" event base. This could lead to thread-safety issues, and obscure,
hard-to-diagnose bugs.
@deprecated All functions in this file are by definition deprecated.
*/
#include <event2/visibility.h>
#ifdef __cplusplus
extern "C" {
#endif
#include <event2/event-config.h>
#ifdef EVENT__HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef EVENT__HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
/* For int types. */
#include <event2/util.h>
/**
Initialize the event API.
The event API needs to be initialized with event_init() before it can be
used. Sets the global current base that gets used for events that have no
base associated with them.
@deprecated This function is deprecated because it replaces the "current"
event_base, and is totally unsafe for multithreaded use. The replacement
is event_base_new().
@see event_base_set(), event_base_new()
*/
EVENT2_EXPORT_SYMBOL
struct event_base *event_init(void);
/**
Loop to process events.
Like event_base_dispatch(), but uses the "current" base.
@deprecated This function is deprecated because it is easily confused by
multiple calls to event_init(), and because it is not safe for
multithreaded use. The replacement is event_base_dispatch().
@see event_base_dispatch(), event_init()
*/
EVENT2_EXPORT_SYMBOL
int event_dispatch(void);
/**
Handle events.
This function behaves like event_base_loop(), but uses the "current" base
@deprecated This function is deprecated because it uses the event base from
the last call to event_init, and is therefore not safe for multithreaded
use. The replacement is event_base_loop().
@see event_base_loop(), event_init()
*/
EVENT2_EXPORT_SYMBOL
int event_loop(int);
/**
Exit the event loop after the specified time.
This function behaves like event_base_loopexit(), except that it uses the
"current" base.
@deprecated This function is deprecated because it uses the event base from
the last call to event_init, and is therefore not safe for multithreaded
use. The replacement is event_base_loopexit().
@see event_init, event_base_loopexit()
*/
EVENT2_EXPORT_SYMBOL
int event_loopexit(const struct timeval *);
/**
Abort the active event_loop() immediately.
This function behaves like event_base_loopbreakt(), except that it uses the
"current" base.
@deprecated This function is deprecated because it uses the event base from
the last call to event_init, and is therefore not safe for multithreaded
use. The replacement is event_base_loopbreak().
@see event_base_loopbreak(), event_init()
*/
EVENT2_EXPORT_SYMBOL
int event_loopbreak(void);
/**
Schedule a one-time event to occur.
@deprecated This function is obsolete, and has been replaced by
event_base_once(). Its use is deprecated because it relies on the
"current" base configured by event_init().
@see event_base_once()
*/
EVENT2_EXPORT_SYMBOL
int event_once(evutil_socket_t , short,
void (*)(evutil_socket_t, short, void *), void *, const struct timeval *);
/**
Get the kernel event notification mechanism used by Libevent.
@deprecated This function is obsolete, and has been replaced by
event_base_get_method(). Its use is deprecated because it relies on the
"current" base configured by event_init().
@see event_base_get_method()
*/
EVENT2_EXPORT_SYMBOL
const char *event_get_method(void);
/**
Set the number of different event priorities.
@deprecated This function is deprecated because it is easily confused by
multiple calls to event_init(), and because it is not safe for
multithreaded use. The replacement is event_base_priority_init().
@see event_base_priority_init()
*/
EVENT2_EXPORT_SYMBOL
int event_priority_init(int);
/**
Prepare an event structure to be added.
@deprecated event_set() is not recommended for new code, because it requires
a subsequent call to event_base_set() to be safe under most circumstances.
Use event_assign() or event_new() instead.
*/
EVENT2_EXPORT_SYMBOL
void event_set(struct event *, evutil_socket_t, short, void (*)(evutil_socket_t, short, void *), void *);
#define evtimer_set(ev, cb, arg) event_set((ev), -1, 0, (cb), (arg))
#define evsignal_set(ev, x, cb, arg) \
event_set((ev), (x), EV_SIGNAL|EV_PERSIST, (cb), (arg))
/**
@name timeout_* macros
@deprecated These macros are deprecated because their naming is inconsistent
with the rest of Libevent. Use the evtimer_* macros instead.
@{
*/
#define timeout_add(ev, tv) event_add((ev), (tv))
#define timeout_set(ev, cb, arg) event_set((ev), -1, 0, (cb), (arg))
#define timeout_del(ev) event_del(ev)
#define timeout_pending(ev, tv) event_pending((ev), EV_TIMEOUT, (tv))
#define timeout_initialized(ev) event_initialized(ev)
/**@}*/
/**
@name signal_* macros
@deprecated These macros are deprecated because their naming is inconsistent
with the rest of Libevent. Use the evsignal_* macros instead.
@{
*/
#define signal_add(ev, tv) event_add((ev), (tv))
#define signal_set(ev, x, cb, arg) \
event_set((ev), (x), EV_SIGNAL|EV_PERSIST, (cb), (arg))
#define signal_del(ev) event_del(ev)
#define signal_pending(ev, tv) event_pending((ev), EV_SIGNAL, (tv))
#define signal_initialized(ev) event_initialized(ev)
/**@}*/
#ifndef EVENT_FD
/* These macros are obsolete; use event_get_fd and event_get_signal instead. */
#define EVENT_FD(ev) ((int)event_get_fd(ev))
#define EVENT_SIGNAL(ev) event_get_signal(ev)
#endif
#ifdef __cplusplus
}
#endif
#endif /* EVENT2_EVENT_COMPAT_H_INCLUDED_ */

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/*
* Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_EVENT_STRUCT_H_INCLUDED_
#define EVENT2_EVENT_STRUCT_H_INCLUDED_
/** @file event2/event_struct.h
Structures used by event.h. Using these structures directly WILL harm
forward compatibility: be careful.
No field declared in this file should be used directly in user code. Except
for historical reasons, these fields would not be exposed at all.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <event2/event-config.h>
#ifdef EVENT__HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef EVENT__HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
/* For int types. */
#include <event2/util.h>
/* For evkeyvalq */
#include <event2/keyvalq_struct.h>
#define EVLIST_TIMEOUT 0x01
#define EVLIST_INSERTED 0x02
#define EVLIST_SIGNAL 0x04
#define EVLIST_ACTIVE 0x08
#define EVLIST_INTERNAL 0x10
#define EVLIST_ACTIVE_LATER 0x20
#define EVLIST_FINALIZING 0x40
#define EVLIST_INIT 0x80
#define EVLIST_ALL 0xff
/* Fix so that people don't have to run with <sys/queue.h> */
#ifndef TAILQ_ENTRY
#define EVENT_DEFINED_TQENTRY_
#define TAILQ_ENTRY(type) \
struct { \
struct type *tqe_next; /* next element */ \
struct type **tqe_prev; /* address of previous next element */ \
}
#endif /* !TAILQ_ENTRY */
#ifndef TAILQ_HEAD
#define EVENT_DEFINED_TQHEAD_
#define TAILQ_HEAD(name, type) \
struct name { \
struct type *tqh_first; \
struct type **tqh_last; \
}
#endif
/* Fix so that people don't have to run with <sys/queue.h> */
#ifndef LIST_ENTRY
#define EVENT_DEFINED_LISTENTRY_
#define LIST_ENTRY(type) \
struct { \
struct type *le_next; /* next element */ \
struct type **le_prev; /* address of previous next element */ \
}
#endif /* !LIST_ENTRY */
#ifndef LIST_HEAD
#define EVENT_DEFINED_LISTHEAD_
#define LIST_HEAD(name, type) \
struct name { \
struct type *lh_first; /* first element */ \
}
#endif /* !LIST_HEAD */
struct event;
struct event_callback {
TAILQ_ENTRY(event_callback) evcb_active_next;
short evcb_flags;
ev_uint8_t evcb_pri; /* smaller numbers are higher priority */
ev_uint8_t evcb_closure;
/* allows us to adopt for different types of events */
union {
void (*evcb_callback)(evutil_socket_t, short, void *);
void (*evcb_selfcb)(struct event_callback *, void *);
void (*evcb_evfinalize)(struct event *, void *);
void (*evcb_cbfinalize)(struct event_callback *, void *);
} evcb_cb_union;
void *evcb_arg;
};
struct event_base;
struct event {
struct event_callback ev_evcallback;
/* for managing timeouts */
union {
TAILQ_ENTRY(event) ev_next_with_common_timeout;
int min_heap_idx;
} ev_timeout_pos;
evutil_socket_t ev_fd;
struct event_base *ev_base;
union {
/* used for io events */
struct {
LIST_ENTRY (event) ev_io_next;
struct timeval ev_timeout;
} ev_io;
/* used by signal events */
struct {
LIST_ENTRY (event) ev_signal_next;
short ev_ncalls;
/* Allows deletes in callback */
short *ev_pncalls;
} ev_signal;
} ev_;
short ev_events;
short ev_res; /* result passed to event callback */
struct timeval ev_timeout;
};
TAILQ_HEAD (event_list, event);
#ifdef EVENT_DEFINED_TQENTRY_
#undef TAILQ_ENTRY
#endif
#ifdef EVENT_DEFINED_TQHEAD_
#undef TAILQ_HEAD
#endif
LIST_HEAD (event_dlist, event);
#ifdef EVENT_DEFINED_LISTENTRY_
#undef LIST_ENTRY
#endif
#ifdef EVENT_DEFINED_LISTHEAD_
#undef LIST_HEAD
#endif
#ifdef __cplusplus
}
#endif
#endif /* EVENT2_EVENT_STRUCT_H_INCLUDED_ */

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/*
* Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_HTTP_COMPAT_H_INCLUDED_
#define EVENT2_HTTP_COMPAT_H_INCLUDED_
/** @file event2/http_compat.h
Potentially non-threadsafe versions of the functions in http.h: provided
only for backwards compatibility.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <event2/event-config.h>
#ifdef EVENT__HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef EVENT__HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
/* For int types. */
#include <event2/util.h>
/**
* Start an HTTP server on the specified address and port
*
* @deprecated It does not allow an event base to be specified
*
* @param address the address to which the HTTP server should be bound
* @param port the port number on which the HTTP server should listen
* @return an struct evhttp object
*/
struct evhttp *evhttp_start(const char *address, ev_uint16_t port);
/**
* A connection object that can be used to for making HTTP requests. The
* connection object tries to establish the connection when it is given an
* http request object.
*
* @deprecated It does not allow an event base to be specified
*/
struct evhttp_connection *evhttp_connection_new(
const char *address, ev_uint16_t port);
/**
* Associates an event base with the connection - can only be called
* on a freshly created connection object that has not been used yet.
*
* @deprecated XXXX Why?
*/
void evhttp_connection_set_base(struct evhttp_connection *evcon,
struct event_base *base);
/** Returns the request URI */
#define evhttp_request_uri evhttp_request_get_uri
#ifdef __cplusplus
}
#endif
#endif /* EVENT2_EVENT_COMPAT_H_INCLUDED_ */

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/*
* Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_HTTP_STRUCT_H_INCLUDED_
#define EVENT2_HTTP_STRUCT_H_INCLUDED_
/** @file event2/http_struct.h
Data structures for http. Using these structures may hurt forward
compatibility with later versions of Libevent: be careful!
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <event2/event-config.h>
#ifdef EVENT__HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef EVENT__HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
/* For int types. */
#include <event2/util.h>
/**
* the request structure that a server receives.
* WARNING: expect this structure to change. I will try to provide
* reasonable accessors.
*/
struct evhttp_request {
#if defined(TAILQ_ENTRY)
TAILQ_ENTRY(evhttp_request) next;
#else
struct {
struct evhttp_request *tqe_next;
struct evhttp_request **tqe_prev;
} next;
#endif
/* the connection object that this request belongs to */
struct evhttp_connection *evcon;
int flags;
/** The request obj owns the evhttp connection and needs to free it */
#define EVHTTP_REQ_OWN_CONNECTION 0x0001
/** Request was made via a proxy */
#define EVHTTP_PROXY_REQUEST 0x0002
/** The request object is owned by the user; the user must free it */
#define EVHTTP_USER_OWNED 0x0004
/** The request will be used again upstack; freeing must be deferred */
#define EVHTTP_REQ_DEFER_FREE 0x0008
/** The request should be freed upstack */
#define EVHTTP_REQ_NEEDS_FREE 0x0010
struct evkeyvalq *input_headers;
struct evkeyvalq *output_headers;
/* address of the remote host and the port connection came from */
char *remote_host;
ev_uint16_t remote_port;
/* cache of the hostname for evhttp_request_get_host */
char *host_cache;
enum evhttp_request_kind kind;
enum evhttp_cmd_type type;
size_t headers_size;
size_t body_size;
char *uri; /* uri after HTTP request was parsed */
struct evhttp_uri *uri_elems; /* uri elements */
char major; /* HTTP Major number */
char minor; /* HTTP Minor number */
int response_code; /* HTTP Response code */
char *response_code_line; /* Readable response */
struct evbuffer *input_buffer; /* read data */
ev_int64_t ntoread;
unsigned chunked:1, /* a chunked request */
userdone:1; /* the user has sent all data */
struct evbuffer *output_buffer; /* outgoing post or data */
/* Callback */
void (*cb)(struct evhttp_request *, void *);
void *cb_arg;
/*
* Chunked data callback - call for each completed chunk if
* specified. If not specified, all the data is delivered via
* the regular callback.
*/
void (*chunk_cb)(struct evhttp_request *, void *);
/*
* Callback added for forked-daapd so they can collect ICY
* (shoutcast) metadata from the http header. If return
* int is negative the connection will be closed.
*/
int (*header_cb)(struct evhttp_request *, void *);
/*
* Error callback - called when error is occured.
* @see evhttp_request_error for error types.
*
* @see evhttp_request_set_error_cb()
*/
void (*error_cb)(enum evhttp_request_error, void *);
/*
* Send complete callback - called when the request is actually
* sent and completed.
*/
void (*on_complete_cb)(struct evhttp_request *, void *);
void *on_complete_cb_arg;
};
#ifdef __cplusplus
}
#endif
#endif /* EVENT2_HTTP_STRUCT_H_INCLUDED_ */

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/*
* Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_KEYVALQ_STRUCT_H_INCLUDED_
#define EVENT2_KEYVALQ_STRUCT_H_INCLUDED_
#ifdef __cplusplus
extern "C" {
#endif
/* Fix so that people don't have to run with <sys/queue.h> */
/* XXXX This code is duplicated with event_struct.h */
#ifndef TAILQ_ENTRY
#define EVENT_DEFINED_TQENTRY_
#define TAILQ_ENTRY(type) \
struct { \
struct type *tqe_next; /* next element */ \
struct type **tqe_prev; /* address of previous next element */ \
}
#endif /* !TAILQ_ENTRY */
#ifndef TAILQ_HEAD
#define EVENT_DEFINED_TQHEAD_
#define TAILQ_HEAD(name, type) \
struct name { \
struct type *tqh_first; \
struct type **tqh_last; \
}
#endif
/*
* Key-Value pairs. Can be used for HTTP headers but also for
* query argument parsing.
*/
struct evkeyval {
TAILQ_ENTRY(evkeyval) next;
char *key;
char *value;
};
TAILQ_HEAD (evkeyvalq, evkeyval);
/* XXXX This code is duplicated with event_struct.h */
#ifdef EVENT_DEFINED_TQENTRY_
#undef TAILQ_ENTRY
#endif
#ifdef EVENT_DEFINED_TQHEAD_
#undef TAILQ_HEAD
#endif
#ifdef __cplusplus
}
#endif
#endif

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/*
* Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_LISTENER_H_INCLUDED_
#define EVENT2_LISTENER_H_INCLUDED_
#include <event2/visibility.h>
#ifdef __cplusplus
extern "C" {
#endif
#include <event2/event.h>
struct sockaddr;
struct evconnlistener;
/**
A callback that we invoke when a listener has a new connection.
@param listener The evconnlistener
@param fd The new file descriptor
@param addr The source address of the connection
@param socklen The length of addr
@param user_arg the pointer passed to evconnlistener_new()
*/
typedef void (*evconnlistener_cb)(struct evconnlistener *, evutil_socket_t, struct sockaddr *, int socklen, void *);
/**
A callback that we invoke when a listener encounters a non-retriable error.
@param listener The evconnlistener
@param user_arg the pointer passed to evconnlistener_new()
*/
typedef void (*evconnlistener_errorcb)(struct evconnlistener *, void *);
/** Flag: Indicates that we should not make incoming sockets nonblocking
* before passing them to the callback. */
#define LEV_OPT_LEAVE_SOCKETS_BLOCKING (1u<<0)
/** Flag: Indicates that freeing the listener should close the underlying
* socket. */
#define LEV_OPT_CLOSE_ON_FREE (1u<<1)
/** Flag: Indicates that we should set the close-on-exec flag, if possible */
#define LEV_OPT_CLOSE_ON_EXEC (1u<<2)
/** Flag: Indicates that we should disable the timeout (if any) between when
* this socket is closed and when we can listen again on the same port. */
#define LEV_OPT_REUSEABLE (1u<<3)
/** Flag: Indicates that the listener should be locked so it's safe to use
* from multiple threadcs at once. */
#define LEV_OPT_THREADSAFE (1u<<4)
/** Flag: Indicates that the listener should be created in disabled
* state. Use evconnlistener_enable() to enable it later. */
#define LEV_OPT_DISABLED (1u<<5)
/** Flag: Indicates that the listener should defer accept() until data is
* available, if possible. Ignored on platforms that do not support this.
*
* This option can help performance for protocols where the client transmits
* immediately after connecting. Do not use this option if your protocol
* _doesn't_ start out with the client transmitting data, since in that case
* this option will sometimes cause the kernel to never tell you about the
* connection.
*
* This option is only supported by evconnlistener_new_bind(): it can't
* work with evconnlistener_new_fd(), since the listener needs to be told
* to use the option before it is actually bound.
*/
#define LEV_OPT_DEFERRED_ACCEPT (1u<<6)
/** Flag: Indicates that we ask to allow multiple servers (processes or
* threads) to bind to the same port if they each set the option.
*
* SO_REUSEPORT is what most people would expect SO_REUSEADDR to be, however
* SO_REUSEPORT does not imply SO_REUSEADDR.
*
* This is only available on Linux and kernel 3.9+
*/
#define LEV_OPT_REUSEABLE_PORT (1u<<7)
/**
Allocate a new evconnlistener object to listen for incoming TCP connections
on a given file descriptor.
@param base The event base to associate the listener with.
@param cb A callback to be invoked when a new connection arrives. If the
callback is NULL, the listener will be treated as disabled until the
callback is set.
@param ptr A user-supplied pointer to give to the callback.
@param flags Any number of LEV_OPT_* flags
@param backlog Passed to the listen() call to determine the length of the
acceptable connection backlog. Set to -1 for a reasonable default.
Set to 0 if the socket is already listening.
@param fd The file descriptor to listen on. It must be a nonblocking
file descriptor, and it should already be bound to an appropriate
port and address.
*/
EVENT2_EXPORT_SYMBOL
struct evconnlistener *evconnlistener_new(struct event_base *base,
evconnlistener_cb cb, void *ptr, unsigned flags, int backlog,
evutil_socket_t fd);
/**
Allocate a new evconnlistener object to listen for incoming TCP connections
on a given address.
@param base The event base to associate the listener with.
@param cb A callback to be invoked when a new connection arrives. If the
callback is NULL, the listener will be treated as disabled until the
callback is set.
@param ptr A user-supplied pointer to give to the callback.
@param flags Any number of LEV_OPT_* flags
@param backlog Passed to the listen() call to determine the length of the
acceptable connection backlog. Set to -1 for a reasonable default.
@param addr The address to listen for connections on.
@param socklen The length of the address.
*/
EVENT2_EXPORT_SYMBOL
struct evconnlistener *evconnlistener_new_bind(struct event_base *base,
evconnlistener_cb cb, void *ptr, unsigned flags, int backlog,
const struct sockaddr *sa, int socklen);
/**
Disable and deallocate an evconnlistener.
*/
EVENT2_EXPORT_SYMBOL
void evconnlistener_free(struct evconnlistener *lev);
/**
Re-enable an evconnlistener that has been disabled.
*/
EVENT2_EXPORT_SYMBOL
int evconnlistener_enable(struct evconnlistener *lev);
/**
Stop listening for connections on an evconnlistener.
*/
EVENT2_EXPORT_SYMBOL
int evconnlistener_disable(struct evconnlistener *lev);
/** Return an evconnlistener's associated event_base. */
EVENT2_EXPORT_SYMBOL
struct event_base *evconnlistener_get_base(struct evconnlistener *lev);
/** Return the socket that an evconnlistner is listening on. */
EVENT2_EXPORT_SYMBOL
evutil_socket_t evconnlistener_get_fd(struct evconnlistener *lev);
/** Change the callback on the listener to cb and its user_data to arg.
*/
EVENT2_EXPORT_SYMBOL
void evconnlistener_set_cb(struct evconnlistener *lev,
evconnlistener_cb cb, void *arg);
/** Set an evconnlistener's error callback. */
EVENT2_EXPORT_SYMBOL
void evconnlistener_set_error_cb(struct evconnlistener *lev,
evconnlistener_errorcb errorcb);
#ifdef __cplusplus
}
#endif
#endif

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/*
* Copyright (c) 2006-2007 Niels Provos <provos@citi.umich.edu>
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_RPC_H_INCLUDED_
#define EVENT2_RPC_H_INCLUDED_
#ifdef __cplusplus
extern "C" {
#endif
/** @file rpc.h
*
* This header files provides basic support for an RPC server and client.
*
* To support RPCs in a server, every supported RPC command needs to be
* defined and registered.
*
* EVRPC_HEADER(SendCommand, Request, Reply);
*
* SendCommand is the name of the RPC command.
* Request is the name of a structure generated by event_rpcgen.py.
* It contains all parameters relating to the SendCommand RPC. The
* server needs to fill in the Reply structure.
* Reply is the name of a structure generated by event_rpcgen.py. It
* contains the answer to the RPC.
*
* To register an RPC with an HTTP server, you need to first create an RPC
* base with:
*
* struct evrpc_base *base = evrpc_init(http);
*
* A specific RPC can then be registered with
*
* EVRPC_REGISTER(base, SendCommand, Request, Reply, FunctionCB, arg);
*
* when the server receives an appropriately formatted RPC, the user callback
* is invoked. The callback needs to fill in the reply structure.
*
* void FunctionCB(EVRPC_STRUCT(SendCommand)* rpc, void *arg);
*
* To send the reply, call EVRPC_REQUEST_DONE(rpc);
*
* See the regression test for an example.
*/
/**
Determines if the member has been set in the message
@param msg the message to inspect
@param member the member variable to test for presences
@return 1 if it's present or 0 otherwise.
*/
#define EVTAG_HAS(msg, member) \
((msg)->member##_set == 1)
#ifndef EVENT2_RPC_COMPAT_H_INCLUDED_
/**
Assigns a value to the member in the message.
@param msg the message to which to assign a value
@param member the name of the member variable
@param value the value to assign
*/
#define EVTAG_ASSIGN(msg, member, value) \
(*(msg)->base->member##_assign)((msg), (value))
/**
Assigns a value to the member in the message.
@param msg the message to which to assign a value
@param member the name of the member variable
@param value the value to assign
@param len the length of the value
*/
#define EVTAG_ASSIGN_WITH_LEN(msg, member, value, len) \
(*(msg)->base->member##_assign)((msg), (value), (len))
/**
Returns the value for a member.
@param msg the message from which to get the value
@param member the name of the member variable
@param pvalue a pointer to the variable to hold the value
@return 0 on success, -1 otherwise.
*/
#define EVTAG_GET(msg, member, pvalue) \
(*(msg)->base->member##_get)((msg), (pvalue))
/**
Returns the value for a member.
@param msg the message from which to get the value
@param member the name of the member variable
@param pvalue a pointer to the variable to hold the value
@param plen a pointer to the length of the value
@return 0 on success, -1 otherwise.
*/
#define EVTAG_GET_WITH_LEN(msg, member, pvalue, plen) \
(*(msg)->base->member##_get)((msg), (pvalue), (plen))
#endif /* EVENT2_RPC_COMPAT_H_INCLUDED_ */
/**
Adds a value to an array.
*/
#define EVTAG_ARRAY_ADD_VALUE(msg, member, value) \
(*(msg)->base->member##_add)((msg), (value))
/**
Allocates a new entry in the array and returns it.
*/
#define EVTAG_ARRAY_ADD(msg, member) \
(*(msg)->base->member##_add)(msg)
/**
Gets a variable at the specified offset from the array.
*/
#define EVTAG_ARRAY_GET(msg, member, offset, pvalue) \
(*(msg)->base->member##_get)((msg), (offset), (pvalue))
/**
Returns the number of entries in the array.
*/
#define EVTAG_ARRAY_LEN(msg, member) ((msg)->member##_length)
struct evbuffer;
struct event_base;
struct evrpc_req_generic;
struct evrpc_request_wrapper;
struct evrpc;
/** The type of a specific RPC Message
*
* @param rpcname the name of the RPC message
*/
#define EVRPC_STRUCT(rpcname) struct evrpc_req__##rpcname
struct evhttp_request;
struct evrpc_status;
struct evrpc_hook_meta;
/** Creates the definitions and prototypes for an RPC
*
* You need to use EVRPC_HEADER to create structures and function prototypes
* needed by the server and client implementation. The structures have to be
* defined in an .rpc file and converted to source code via event_rpcgen.py
*
* @param rpcname the name of the RPC
* @param reqstruct the name of the RPC request structure
* @param replystruct the name of the RPC reply structure
* @see EVRPC_GENERATE()
*/
#define EVRPC_HEADER(rpcname, reqstruct, rplystruct) \
EVRPC_STRUCT(rpcname) { \
struct evrpc_hook_meta *hook_meta; \
struct reqstruct* request; \
struct rplystruct* reply; \
struct evrpc* rpc; \
struct evhttp_request* http_req; \
struct evbuffer* rpc_data; \
}; \
int evrpc_send_request_##rpcname(struct evrpc_pool *, \
struct reqstruct *, struct rplystruct *, \
void (*)(struct evrpc_status *, \
struct reqstruct *, struct rplystruct *, void *cbarg), \
void *);
struct evrpc_pool;
/** use EVRPC_GENERATE instead */
struct evrpc_request_wrapper *evrpc_make_request_ctx(
struct evrpc_pool *pool, void *request, void *reply,
const char *rpcname,
void (*req_marshal)(struct evbuffer*, void *),
void (*rpl_clear)(void *),
int (*rpl_unmarshal)(void *, struct evbuffer *),
void (*cb)(struct evrpc_status *, void *, void *, void *),
void *cbarg);
/** Creates a context structure that contains rpc specific information.
*
* EVRPC_MAKE_CTX is used to populate a RPC specific context that
* contains information about marshaling the RPC data types.
*
* @param rpcname the name of the RPC
* @param reqstruct the name of the RPC request structure
* @param replystruct the name of the RPC reply structure
* @param pool the evrpc_pool over which to make the request
* @param request a pointer to the RPC request structure object
* @param reply a pointer to the RPC reply structure object
* @param cb the callback function to call when the RPC has completed
* @param cbarg the argument to supply to the callback
*/
#define EVRPC_MAKE_CTX(rpcname, reqstruct, rplystruct, \
pool, request, reply, cb, cbarg) \
evrpc_make_request_ctx(pool, request, reply, \
#rpcname, \
(void (*)(struct evbuffer *, void *))reqstruct##_marshal, \
(void (*)(void *))rplystruct##_clear, \
(int (*)(void *, struct evbuffer *))rplystruct##_unmarshal, \
(void (*)(struct evrpc_status *, void *, void *, void *))cb, \
cbarg)
/** Generates the code for receiving and sending an RPC message
*
* EVRPC_GENERATE is used to create the code corresponding to sending
* and receiving a particular RPC message
*
* @param rpcname the name of the RPC
* @param reqstruct the name of the RPC request structure
* @param replystruct the name of the RPC reply structure
* @see EVRPC_HEADER()
*/
#define EVRPC_GENERATE(rpcname, reqstruct, rplystruct) \
int evrpc_send_request_##rpcname(struct evrpc_pool *pool, \
struct reqstruct *request, struct rplystruct *reply, \
void (*cb)(struct evrpc_status *, \
struct reqstruct *, struct rplystruct *, void *cbarg), \
void *cbarg) { \
return evrpc_send_request_generic(pool, request, reply, \
(void (*)(struct evrpc_status *, void *, void *, void *))cb, \
cbarg, \
#rpcname, \
(void (*)(struct evbuffer *, void *))reqstruct##_marshal, \
(void (*)(void *))rplystruct##_clear, \
(int (*)(void *, struct evbuffer *))rplystruct##_unmarshal); \
}
/** Provides access to the HTTP request object underlying an RPC
*
* Access to the underlying http object; can be used to look at headers or
* for getting the remote ip address
*
* @param rpc_req the rpc request structure provided to the server callback
* @return an struct evhttp_request object that can be inspected for
* HTTP headers or sender information.
*/
#define EVRPC_REQUEST_HTTP(rpc_req) (rpc_req)->http_req
/** completes the server response to an rpc request */
void evrpc_request_done(struct evrpc_req_generic *req);
/** accessors for request and reply */
void *evrpc_get_request(struct evrpc_req_generic *req);
void *evrpc_get_reply(struct evrpc_req_generic *req);
/** Creates the reply to an RPC request
*
* EVRPC_REQUEST_DONE is used to answer a request; the reply is expected
* to have been filled in. The request and reply pointers become invalid
* after this call has finished.
*
* @param rpc_req the rpc request structure provided to the server callback
*/
#define EVRPC_REQUEST_DONE(rpc_req) do { \
struct evrpc_req_generic *req_ = (struct evrpc_req_generic *)(rpc_req); \
evrpc_request_done(req_); \
} while (0)
struct evrpc_base;
struct evhttp;
/* functions to start up the rpc system */
/** Creates a new rpc base from which RPC requests can be received
*
* @param server a pointer to an existing HTTP server
* @return a newly allocated evrpc_base struct
* @see evrpc_free()
*/
struct evrpc_base *evrpc_init(struct evhttp *server);
/**
* Frees the evrpc base
*
* For now, you are responsible for making sure that no rpcs are ongoing.
*
* @param base the evrpc_base object to be freed
* @see evrpc_init
*/
void evrpc_free(struct evrpc_base *base);
/** register RPCs with the HTTP Server
*
* registers a new RPC with the HTTP server, each RPC needs to have
* a unique name under which it can be identified.
*
* @param base the evrpc_base structure in which the RPC should be
* registered.
* @param name the name of the RPC
* @param request the name of the RPC request structure
* @param reply the name of the RPC reply structure
* @param callback the callback that should be invoked when the RPC
* is received. The callback has the following prototype
* void (*callback)(EVRPC_STRUCT(Message)* rpc, void *arg)
* @param cbarg an additional parameter that can be passed to the callback.
* The parameter can be used to carry around state.
*/
#define EVRPC_REGISTER(base, name, request, reply, callback, cbarg) \
evrpc_register_generic(base, #name, \
(void (*)(struct evrpc_req_generic *, void *))callback, cbarg, \
(void *(*)(void *))request##_new, NULL, \
(void (*)(void *))request##_free, \
(int (*)(void *, struct evbuffer *))request##_unmarshal, \
(void *(*)(void *))reply##_new, NULL, \
(void (*)(void *))reply##_free, \
(int (*)(void *))reply##_complete, \
(void (*)(struct evbuffer *, void *))reply##_marshal)
/**
Low level function for registering an RPC with a server.
Use EVRPC_REGISTER() instead.
@see EVRPC_REGISTER()
*/
int evrpc_register_rpc(struct evrpc_base *, struct evrpc *,
void (*)(struct evrpc_req_generic*, void *), void *);
/**
* Unregisters an already registered RPC
*
* @param base the evrpc_base object from which to unregister an RPC
* @param name the name of the rpc to unregister
* @return -1 on error or 0 when successful.
* @see EVRPC_REGISTER()
*/
#define EVRPC_UNREGISTER(base, name) evrpc_unregister_rpc((base), #name)
int evrpc_unregister_rpc(struct evrpc_base *base, const char *name);
/*
* Client-side RPC support
*/
struct evhttp_connection;
struct evrpc_status;
/** launches an RPC and sends it to the server
*
* EVRPC_MAKE_REQUEST() is used by the client to send an RPC to the server.
*
* @param name the name of the RPC
* @param pool the evrpc_pool that contains the connection objects over which
* the request should be sent.
* @param request a pointer to the RPC request structure - it contains the
* data to be sent to the server.
* @param reply a pointer to the RPC reply structure. It is going to be filled
* if the request was answered successfully
* @param cb the callback to invoke when the RPC request has been answered
* @param cbarg an additional argument to be passed to the client
* @return 0 on success, -1 on failure
*/
#define EVRPC_MAKE_REQUEST(name, pool, request, reply, cb, cbarg) \
evrpc_send_request_##name((pool), (request), (reply), (cb), (cbarg))
/**
Makes an RPC request based on the provided context.
This is a low-level function and should not be used directly
unless a custom context object is provided. Use EVRPC_MAKE_REQUEST()
instead.
@param ctx a context from EVRPC_MAKE_CTX()
@returns 0 on success, -1 otherwise.
@see EVRPC_MAKE_REQUEST(), EVRPC_MAKE_CTX()
*/
int evrpc_make_request(struct evrpc_request_wrapper *ctx);
/** creates an rpc connection pool
*
* a pool has a number of connections associated with it.
* rpc requests are always made via a pool.
*
* @param base a pointer to an struct event_based object; can be left NULL
* in singled-threaded applications
* @return a newly allocated struct evrpc_pool object
* @see evrpc_pool_free()
*/
struct evrpc_pool *evrpc_pool_new(struct event_base *base);
/** frees an rpc connection pool
*
* @param pool a pointer to an evrpc_pool allocated via evrpc_pool_new()
* @see evrpc_pool_new()
*/
void evrpc_pool_free(struct evrpc_pool *pool);
/**
* Adds a connection over which rpc can be dispatched to the pool.
*
* The connection object must have been newly created.
*
* @param pool the pool to which to add the connection
* @param evcon the connection to add to the pool.
*/
void evrpc_pool_add_connection(struct evrpc_pool *pool,
struct evhttp_connection *evcon);
/**
* Removes a connection from the pool.
*
* The connection object must have been newly created.
*
* @param pool the pool from which to remove the connection
* @param evcon the connection to remove from the pool.
*/
void evrpc_pool_remove_connection(struct evrpc_pool *pool,
struct evhttp_connection *evcon);
/**
* Sets the timeout in secs after which a request has to complete. The
* RPC is completely aborted if it does not complete by then. Setting
* the timeout to 0 means that it never timeouts and can be used to
* implement callback type RPCs.
*
* Any connection already in the pool will be updated with the new
* timeout. Connections added to the pool after set_timeout has be
* called receive the pool timeout only if no timeout has been set
* for the connection itself.
*
* @param pool a pointer to a struct evrpc_pool object
* @param timeout_in_secs the number of seconds after which a request should
* timeout and a failure be returned to the callback.
*/
void evrpc_pool_set_timeout(struct evrpc_pool *pool, int timeout_in_secs);
/**
* Hooks for changing the input and output of RPCs; this can be used to
* implement compression, authentication, encryption, ...
*/
enum EVRPC_HOOK_TYPE {
EVRPC_INPUT, /**< apply the function to an input hook */
EVRPC_OUTPUT /**< apply the function to an output hook */
};
#ifndef _WIN32
/** Deprecated alias for EVRPC_INPUT. Not available on windows, where it
* conflicts with platform headers. */
#define INPUT EVRPC_INPUT
/** Deprecated alias for EVRPC_OUTPUT. Not available on windows, where it
* conflicts with platform headers. */
#define OUTPUT EVRPC_OUTPUT
#endif
/**
* Return value from hook processing functions
*/
enum EVRPC_HOOK_RESULT {
EVRPC_TERMINATE = -1, /**< indicates the rpc should be terminated */
EVRPC_CONTINUE = 0, /**< continue processing the rpc */
EVRPC_PAUSE = 1 /**< pause processing request until resumed */
};
/** adds a processing hook to either an rpc base or rpc pool
*
* If a hook returns TERMINATE, the processing is aborted. On CONTINUE,
* the request is immediately processed after the hook returns. If the
* hook returns PAUSE, request processing stops until evrpc_resume_request()
* has been called.
*
* The add functions return handles that can be used for removing hooks.
*
* @param vbase a pointer to either struct evrpc_base or struct evrpc_pool
* @param hook_type either INPUT or OUTPUT
* @param cb the callback to call when the hook is activated
* @param cb_arg an additional argument for the callback
* @return a handle to the hook so it can be removed later
* @see evrpc_remove_hook()
*/
void *evrpc_add_hook(void *vbase,
enum EVRPC_HOOK_TYPE hook_type,
int (*cb)(void *, struct evhttp_request *, struct evbuffer *, void *),
void *cb_arg);
/** removes a previously added hook
*
* @param vbase a pointer to either struct evrpc_base or struct evrpc_pool
* @param hook_type either INPUT or OUTPUT
* @param handle a handle returned by evrpc_add_hook()
* @return 1 on success or 0 on failure
* @see evrpc_add_hook()
*/
int evrpc_remove_hook(void *vbase,
enum EVRPC_HOOK_TYPE hook_type,
void *handle);
/** resume a paused request
*
* @param vbase a pointer to either struct evrpc_base or struct evrpc_pool
* @param ctx the context pointer provided to the original hook call
*/
int
evrpc_resume_request(void *vbase, void *ctx, enum EVRPC_HOOK_RESULT res);
/** adds meta data to request
*
* evrpc_hook_add_meta() allows hooks to add meta data to a request. for
* a client request, the meta data can be inserted by an outgoing request hook
* and retrieved by the incoming request hook.
*
* @param ctx the context provided to the hook call
* @param key a NUL-terminated c-string
* @param data the data to be associated with the key
* @param data_size the size of the data
*/
void evrpc_hook_add_meta(void *ctx, const char *key,
const void *data, size_t data_size);
/** retrieves meta data previously associated
*
* evrpc_hook_find_meta() can be used to retrieve meta data associated to a
* request by a previous hook.
* @param ctx the context provided to the hook call
* @param key a NUL-terminated c-string
* @param data pointer to a data pointer that will contain the retrieved data
* @param data_size pointer to the size of the data
* @return 0 on success or -1 on failure
*/
int evrpc_hook_find_meta(void *ctx, const char *key,
void **data, size_t *data_size);
/**
* returns the connection object associated with the request
*
* @param ctx the context provided to the hook call
* @return a pointer to the evhttp_connection object
*/
struct evhttp_connection *evrpc_hook_get_connection(void *ctx);
/**
Function for sending a generic RPC request.
Do not call this function directly, use EVRPC_MAKE_REQUEST() instead.
@see EVRPC_MAKE_REQUEST()
*/
int evrpc_send_request_generic(struct evrpc_pool *pool,
void *request, void *reply,
void (*cb)(struct evrpc_status *, void *, void *, void *),
void *cb_arg,
const char *rpcname,
void (*req_marshal)(struct evbuffer *, void *),
void (*rpl_clear)(void *),
int (*rpl_unmarshal)(void *, struct evbuffer *));
/**
Function for registering a generic RPC with the RPC base.
Do not call this function directly, use EVRPC_REGISTER() instead.
@see EVRPC_REGISTER()
*/
int
evrpc_register_generic(struct evrpc_base *base, const char *name,
void (*callback)(struct evrpc_req_generic *, void *), void *cbarg,
void *(*req_new)(void *), void *req_new_arg, void (*req_free)(void *),
int (*req_unmarshal)(void *, struct evbuffer *),
void *(*rpl_new)(void *), void *rpl_new_arg, void (*rpl_free)(void *),
int (*rpl_complete)(void *),
void (*rpl_marshal)(struct evbuffer *, void *));
/** accessors for obscure and undocumented functionality */
struct evrpc_pool* evrpc_request_get_pool(struct evrpc_request_wrapper *ctx);
void evrpc_request_set_pool(struct evrpc_request_wrapper *ctx,
struct evrpc_pool *pool);
void evrpc_request_set_cb(struct evrpc_request_wrapper *ctx,
void (*cb)(struct evrpc_status*, void *request, void *reply, void *arg),
void *cb_arg);
#ifdef __cplusplus
}
#endif
#endif /* EVENT2_RPC_H_INCLUDED_ */

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/*
* Copyright (c) 2006-2007 Niels Provos <provos@citi.umich.edu>
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_RPC_COMPAT_H_INCLUDED_
#define EVENT2_RPC_COMPAT_H_INCLUDED_
/** @file event2/rpc_compat.h
Deprecated versions of the functions in rpc.h: provided only for
backwards compatibility.
*/
#ifdef __cplusplus
extern "C" {
#endif
/** backwards compatible accessors that work only with gcc */
#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
#undef EVTAG_ASSIGN
#undef EVTAG_GET
#undef EVTAG_ADD
#define EVTAG_ASSIGN(msg, member, args...) \
(*(msg)->base->member##_assign)(msg, ## args)
#define EVTAG_GET(msg, member, args...) \
(*(msg)->base->member##_get)(msg, ## args)
#define EVTAG_ADD(msg, member, args...) \
(*(msg)->base->member##_add)(msg, ## args)
#endif
#define EVTAG_LEN(msg, member) ((msg)->member##_length)
#ifdef __cplusplus
}
#endif
#endif /* EVENT2_EVENT_COMPAT_H_INCLUDED_ */

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/*
* Copyright (c) 2006-2007 Niels Provos <provos@citi.umich.edu>
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_RPC_STRUCT_H_INCLUDED_
#define EVENT2_RPC_STRUCT_H_INCLUDED_
#ifdef __cplusplus
extern "C" {
#endif
/** @file event2/rpc_struct.h
Structures used by rpc.h. Using these structures directly may harm
forward compatibility: be careful!
*/
/**
* provides information about the completed RPC request.
*/
struct evrpc_status {
#define EVRPC_STATUS_ERR_NONE 0
#define EVRPC_STATUS_ERR_TIMEOUT 1
#define EVRPC_STATUS_ERR_BADPAYLOAD 2
#define EVRPC_STATUS_ERR_UNSTARTED 3
#define EVRPC_STATUS_ERR_HOOKABORTED 4
int error;
/* for looking at headers or other information */
struct evhttp_request *http_req;
};
/* the structure below needs to be synchronized with evrpc_req_generic */
/* Encapsulates a request */
struct evrpc {
TAILQ_ENTRY(evrpc) next;
/* the URI at which the request handler lives */
const char* uri;
/* creates a new request structure */
void *(*request_new)(void *);
void *request_new_arg;
/* frees the request structure */
void (*request_free)(void *);
/* unmarshals the buffer into the proper request structure */
int (*request_unmarshal)(void *, struct evbuffer *);
/* creates a new reply structure */
void *(*reply_new)(void *);
void *reply_new_arg;
/* frees the reply structure */
void (*reply_free)(void *);
/* verifies that the reply is valid */
int (*reply_complete)(void *);
/* marshals the reply into a buffer */
void (*reply_marshal)(struct evbuffer*, void *);
/* the callback invoked for each received rpc */
void (*cb)(struct evrpc_req_generic *, void *);
void *cb_arg;
/* reference for further configuration */
struct evrpc_base *base;
};
#ifdef __cplusplus
}
#endif
#endif /* EVENT2_RPC_STRUCT_H_INCLUDED_ */

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/*
* Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_TAG_H_INCLUDED_
#define EVENT2_TAG_H_INCLUDED_
/** @file event2/tag.h
Helper functions for reading and writing tagged data onto buffers.
*/
#include <event2/visibility.h>
#ifdef __cplusplus
extern "C" {
#endif
#include <event2/event-config.h>
#ifdef EVENT__HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef EVENT__HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
/* For int types. */
#include <event2/util.h>
struct evbuffer;
/*
* Marshaling tagged data - We assume that all tags are inserted in their
* numeric order - so that unknown tags will always be higher than the
* known ones - and we can just ignore the end of an event buffer.
*/
EVENT2_EXPORT_SYMBOL
void evtag_init(void);
/**
Unmarshals the header and returns the length of the payload
@param evbuf the buffer from which to unmarshal data
@param ptag a pointer in which the tag id is being stored
@returns -1 on failure or the number of bytes in the remaining payload.
*/
EVENT2_EXPORT_SYMBOL
int evtag_unmarshal_header(struct evbuffer *evbuf, ev_uint32_t *ptag);
EVENT2_EXPORT_SYMBOL
void evtag_marshal(struct evbuffer *evbuf, ev_uint32_t tag, const void *data,
ev_uint32_t len);
EVENT2_EXPORT_SYMBOL
void evtag_marshal_buffer(struct evbuffer *evbuf, ev_uint32_t tag,
struct evbuffer *data);
/**
Encode an integer and store it in an evbuffer.
We encode integers by nybbles; the first nibble contains the number
of significant nibbles - 1; this allows us to encode up to 64-bit
integers. This function is byte-order independent.
@param evbuf evbuffer to store the encoded number
@param number a 32-bit integer
*/
EVENT2_EXPORT_SYMBOL
void evtag_encode_int(struct evbuffer *evbuf, ev_uint32_t number);
EVENT2_EXPORT_SYMBOL
void evtag_encode_int64(struct evbuffer *evbuf, ev_uint64_t number);
EVENT2_EXPORT_SYMBOL
void evtag_marshal_int(struct evbuffer *evbuf, ev_uint32_t tag,
ev_uint32_t integer);
EVENT2_EXPORT_SYMBOL
void evtag_marshal_int64(struct evbuffer *evbuf, ev_uint32_t tag,
ev_uint64_t integer);
EVENT2_EXPORT_SYMBOL
void evtag_marshal_string(struct evbuffer *buf, ev_uint32_t tag,
const char *string);
EVENT2_EXPORT_SYMBOL
void evtag_marshal_timeval(struct evbuffer *evbuf, ev_uint32_t tag,
struct timeval *tv);
EVENT2_EXPORT_SYMBOL
int evtag_unmarshal(struct evbuffer *src, ev_uint32_t *ptag,
struct evbuffer *dst);
EVENT2_EXPORT_SYMBOL
int evtag_peek(struct evbuffer *evbuf, ev_uint32_t *ptag);
EVENT2_EXPORT_SYMBOL
int evtag_peek_length(struct evbuffer *evbuf, ev_uint32_t *plength);
EVENT2_EXPORT_SYMBOL
int evtag_payload_length(struct evbuffer *evbuf, ev_uint32_t *plength);
EVENT2_EXPORT_SYMBOL
int evtag_consume(struct evbuffer *evbuf);
EVENT2_EXPORT_SYMBOL
int evtag_unmarshal_int(struct evbuffer *evbuf, ev_uint32_t need_tag,
ev_uint32_t *pinteger);
EVENT2_EXPORT_SYMBOL
int evtag_unmarshal_int64(struct evbuffer *evbuf, ev_uint32_t need_tag,
ev_uint64_t *pinteger);
EVENT2_EXPORT_SYMBOL
int evtag_unmarshal_fixed(struct evbuffer *src, ev_uint32_t need_tag,
void *data, size_t len);
EVENT2_EXPORT_SYMBOL
int evtag_unmarshal_string(struct evbuffer *evbuf, ev_uint32_t need_tag,
char **pstring);
EVENT2_EXPORT_SYMBOL
int evtag_unmarshal_timeval(struct evbuffer *evbuf, ev_uint32_t need_tag,
struct timeval *ptv);
#ifdef __cplusplus
}
#endif
#endif /* EVENT2_TAG_H_INCLUDED_ */

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/*
* Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_TAG_COMPAT_H_INCLUDED_
#define EVENT2_TAG_COMPAT_H_INCLUDED_
/** @file event2/tag_compat.h
Obsolete/deprecated functions from tag.h; provided only for backwards
compatibility.
*/
/**
@name Misnamed functions
@deprecated These macros are deprecated because their names don't follow
Libevent's naming conventions. Use evtag_encode_int and
evtag_encode_int64 instead.
@{
*/
#define encode_int(evbuf, number) evtag_encode_int((evbuf), (number))
#define encode_int64(evbuf, number) evtag_encode_int64((evbuf), (number))
/**@}*/
#endif /* EVENT2_TAG_H_INCLUDED_ */

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/*
* Copyright (c) 2008-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_THREAD_H_INCLUDED_
#define EVENT2_THREAD_H_INCLUDED_
/** @file event2/thread.h
Functions for multi-threaded applications using Libevent.
When using a multi-threaded application in which multiple threads
add and delete events from a single event base, Libevent needs to
lock its data structures.
Like the memory-management function hooks, all of the threading functions
_must_ be set up before an event_base is created if you want the base to
use them.
Most programs will either be using Windows threads or Posix threads. You
can configure Libevent to use one of these event_use_windows_threads() or
event_use_pthreads() respectively. If you're using another threading
library, you'll need to configure threading functions manually using
evthread_set_lock_callbacks() and evthread_set_condition_callbacks().
*/
#include <event2/visibility.h>
#ifdef __cplusplus
extern "C" {
#endif
#include <event2/event-config.h>
/**
@name Flags passed to lock functions
@{
*/
/** A flag passed to a locking callback when the lock was allocated as a
* read-write lock, and we want to acquire or release the lock for writing. */
#define EVTHREAD_WRITE 0x04
/** A flag passed to a locking callback when the lock was allocated as a
* read-write lock, and we want to acquire or release the lock for reading. */
#define EVTHREAD_READ 0x08
/** A flag passed to a locking callback when we don't want to block waiting
* for the lock; if we can't get the lock immediately, we will instead
* return nonzero from the locking callback. */
#define EVTHREAD_TRY 0x10
/**@}*/
#if !defined(EVENT__DISABLE_THREAD_SUPPORT) || defined(EVENT_IN_DOXYGEN_)
#define EVTHREAD_LOCK_API_VERSION 1
/**
@name Types of locks
@{*/
/** A recursive lock is one that can be acquired multiple times at once by the
* same thread. No other process can allocate the lock until the thread that
* has been holding it has unlocked it as many times as it locked it. */
#define EVTHREAD_LOCKTYPE_RECURSIVE 1
/* A read-write lock is one that allows multiple simultaneous readers, but
* where any one writer excludes all other writers and readers. */
#define EVTHREAD_LOCKTYPE_READWRITE 2
/**@}*/
/** This structure describes the interface a threading library uses for
* locking. It's used to tell evthread_set_lock_callbacks() how to use
* locking on this platform.
*/
struct evthread_lock_callbacks {
/** The current version of the locking API. Set this to
* EVTHREAD_LOCK_API_VERSION */
int lock_api_version;
/** Which kinds of locks does this version of the locking API
* support? A bitfield of EVTHREAD_LOCKTYPE_RECURSIVE and
* EVTHREAD_LOCKTYPE_READWRITE.
*
* (Note that RECURSIVE locks are currently mandatory, and
* READWRITE locks are not currently used.)
**/
unsigned supported_locktypes;
/** Function to allocate and initialize new lock of type 'locktype'.
* Returns NULL on failure. */
void *(*alloc)(unsigned locktype);
/** Funtion to release all storage held in 'lock', which was created
* with type 'locktype'. */
void (*free)(void *lock, unsigned locktype);
/** Acquire an already-allocated lock at 'lock' with mode 'mode'.
* Returns 0 on success, and nonzero on failure. */
int (*lock)(unsigned mode, void *lock);
/** Release a lock at 'lock' using mode 'mode'. Returns 0 on success,
* and nonzero on failure. */
int (*unlock)(unsigned mode, void *lock);
};
/** Sets a group of functions that Libevent should use for locking.
* For full information on the required callback API, see the
* documentation for the individual members of evthread_lock_callbacks.
*
* Note that if you're using Windows or the Pthreads threading library, you
* probably shouldn't call this function; instead, use
* evthread_use_windows_threads() or evthread_use_posix_threads() if you can.
*/
EVENT2_EXPORT_SYMBOL
int evthread_set_lock_callbacks(const struct evthread_lock_callbacks *);
#define EVTHREAD_CONDITION_API_VERSION 1
struct timeval;
/** This structure describes the interface a threading library uses for
* condition variables. It's used to tell evthread_set_condition_callbacks
* how to use locking on this platform.
*/
struct evthread_condition_callbacks {
/** The current version of the conditions API. Set this to
* EVTHREAD_CONDITION_API_VERSION */
int condition_api_version;
/** Function to allocate and initialize a new condition variable.
* Returns the condition variable on success, and NULL on failure.
* The 'condtype' argument will be 0 with this API version.
*/
void *(*alloc_condition)(unsigned condtype);
/** Function to free a condition variable. */
void (*free_condition)(void *cond);
/** Function to signal a condition variable. If 'broadcast' is 1, all
* threads waiting on 'cond' should be woken; otherwise, only on one
* thread is worken. Should return 0 on success, -1 on failure.
* This function will only be called while holding the associated
* lock for the condition.
*/
int (*signal_condition)(void *cond, int broadcast);
/** Function to wait for a condition variable. The lock 'lock'
* will be held when this function is called; should be released
* while waiting for the condition to be come signalled, and
* should be held again when this function returns.
* If timeout is provided, it is interval of seconds to wait for
* the event to become signalled; if it is NULL, the function
* should wait indefinitely.
*
* The function should return -1 on error; 0 if the condition
* was signalled, or 1 on a timeout. */
int (*wait_condition)(void *cond, void *lock,
const struct timeval *timeout);
};
/** Sets a group of functions that Libevent should use for condition variables.
* For full information on the required callback API, see the
* documentation for the individual members of evthread_condition_callbacks.
*
* Note that if you're using Windows or the Pthreads threading library, you
* probably shouldn't call this function; instead, use
* evthread_use_windows_threads() or evthread_use_pthreads() if you can.
*/
EVENT2_EXPORT_SYMBOL
int evthread_set_condition_callbacks(
const struct evthread_condition_callbacks *);
/**
Sets the function for determining the thread id.
@param base the event base for which to set the id function
@param id_fn the identify function Libevent should invoke to
determine the identity of a thread.
*/
EVENT2_EXPORT_SYMBOL
void evthread_set_id_callback(
unsigned long (*id_fn)(void));
#if (defined(_WIN32) && !defined(EVENT__DISABLE_THREAD_SUPPORT)) || defined(EVENT_IN_DOXYGEN_)
/** Sets up Libevent for use with Windows builtin locking and thread ID
functions. Unavailable if Libevent is not built for Windows.
@return 0 on success, -1 on failure. */
EVENT2_EXPORT_SYMBOL
int evthread_use_windows_threads(void);
/**
Defined if Libevent was built with support for evthread_use_windows_threads()
*/
#define EVTHREAD_USE_WINDOWS_THREADS_IMPLEMENTED 1
#endif
#if defined(EVENT__HAVE_PTHREADS) || defined(EVENT_IN_DOXYGEN_)
/** Sets up Libevent for use with Pthreads locking and thread ID functions.
Unavailable if Libevent is not build for use with pthreads. Requires
libraries to link against Libevent_pthreads as well as Libevent.
@return 0 on success, -1 on failure. */
EVENT2_EXPORT_SYMBOL
int evthread_use_pthreads(void);
/** Defined if Libevent was built with support for evthread_use_pthreads() */
#define EVTHREAD_USE_PTHREADS_IMPLEMENTED 1
#endif
/** Enable debugging wrappers around the current lock callbacks. If Libevent
* makes one of several common locking errors, exit with an assertion failure.
*
* If you're going to call this function, you must do so before any locks are
* allocated.
**/
EVENT2_EXPORT_SYMBOL
void evthread_enable_lock_debugging(void);
/* Old (misspelled) version: This is deprecated; use
* evthread_enable_log_debugging instead. */
EVENT2_EXPORT_SYMBOL
void evthread_enable_lock_debuging(void);
#endif /* EVENT__DISABLE_THREAD_SUPPORT */
struct event_base;
/** Make sure it's safe to tell an event base to wake up from another thread
or a signal handler.
You shouldn't need to call this by hand; configuring the base with thread
support should be necessary and sufficient.
@return 0 on success, -1 on failure.
*/
EVENT2_EXPORT_SYMBOL
int evthread_make_base_notifiable(struct event_base *base);
#ifdef __cplusplus
}
#endif
#endif /* EVENT2_THREAD_H_INCLUDED_ */

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/*
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_UTIL_H_INCLUDED_
#define EVENT2_UTIL_H_INCLUDED_
/** @file event2/util.h
Common convenience functions for cross-platform portability and
related socket manipulations.
*/
#include <event2/visibility.h>
#ifdef __cplusplus
extern "C" {
#endif
#include <event2/event-config.h>
#ifdef EVENT__HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef EVENT__HAVE_STDINT_H
#include <stdint.h>
#elif defined(EVENT__HAVE_INTTYPES_H)
#include <inttypes.h>
#endif
#ifdef EVENT__HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef EVENT__HAVE_STDDEF_H
#include <stddef.h>
#endif
#ifdef _MSC_VER
#include <BaseTsd.h>
#endif
#include <stdarg.h>
#ifdef EVENT__HAVE_NETDB_H
#if !defined(_GNU_SOURCE)
#define _GNU_SOURCE
#endif
#include <netdb.h>
#endif
#ifdef _WIN32
#include <winsock2.h>
#ifdef EVENT__HAVE_GETADDRINFO
/* for EAI_* definitions. */
#include <ws2tcpip.h>
#endif
#else
#ifdef EVENT__HAVE_ERRNO_H
#include <errno.h>
#endif
#include <sys/socket.h>
#endif
#include <time.h>
/* Some openbsd autoconf versions get the name of this macro wrong. */
#if defined(EVENT__SIZEOF_VOID__) && !defined(EVENT__SIZEOF_VOID_P)
#define EVENT__SIZEOF_VOID_P EVENT__SIZEOF_VOID__
#endif
/**
* @name Standard integer types.
*
* Integer type definitions for types that are supposed to be defined in the
* C99-specified stdint.h. Shamefully, some platforms do not include
* stdint.h, so we need to replace it. (If you are on a platform like this,
* your C headers are now over 10 years out of date. You should bug them to
* do something about this.)
*
* We define:
*
* <dl>
* <dt>ev_uint64_t, ev_uint32_t, ev_uint16_t, ev_uint8_t</dt>
* <dd>unsigned integer types of exactly 64, 32, 16, and 8 bits
* respectively.</dd>
* <dt>ev_int64_t, ev_int32_t, ev_int16_t, ev_int8_t</dt>
* <dd>signed integer types of exactly 64, 32, 16, and 8 bits
* respectively.</dd>
* <dt>ev_uintptr_t, ev_intptr_t</dt>
* <dd>unsigned/signed integers large enough
* to hold a pointer without loss of bits.</dd>
* <dt>ev_ssize_t</dt>
* <dd>A signed type of the same size as size_t</dd>
* <dt>ev_off_t</dt>
* <dd>A signed type typically used to represent offsets within a
* (potentially large) file</dd>
*
* @{
*/
#ifdef EVENT__HAVE_UINT64_T
#define ev_uint64_t uint64_t
#define ev_int64_t int64_t
#elif defined(_WIN32)
#define ev_uint64_t unsigned __int64
#define ev_int64_t signed __int64
#elif EVENT__SIZEOF_LONG_LONG == 8
#define ev_uint64_t unsigned long long
#define ev_int64_t long long
#elif EVENT__SIZEOF_LONG == 8
#define ev_uint64_t unsigned long
#define ev_int64_t long
#elif defined(EVENT_IN_DOXYGEN_)
#define ev_uint64_t ...
#define ev_int64_t ...
#else
#error "No way to define ev_uint64_t"
#endif
#ifdef EVENT__HAVE_UINT32_T
#define ev_uint32_t uint32_t
#define ev_int32_t int32_t
#elif defined(_WIN32)
#define ev_uint32_t unsigned int
#define ev_int32_t signed int
#elif EVENT__SIZEOF_LONG == 4
#define ev_uint32_t unsigned long
#define ev_int32_t signed long
#elif EVENT__SIZEOF_INT == 4
#define ev_uint32_t unsigned int
#define ev_int32_t signed int
#elif defined(EVENT_IN_DOXYGEN_)
#define ev_uint32_t ...
#define ev_int32_t ...
#else
#error "No way to define ev_uint32_t"
#endif
#ifdef EVENT__HAVE_UINT16_T
#define ev_uint16_t uint16_t
#define ev_int16_t int16_t
#elif defined(_WIN32)
#define ev_uint16_t unsigned short
#define ev_int16_t signed short
#elif EVENT__SIZEOF_INT == 2
#define ev_uint16_t unsigned int
#define ev_int16_t signed int
#elif EVENT__SIZEOF_SHORT == 2
#define ev_uint16_t unsigned short
#define ev_int16_t signed short
#elif defined(EVENT_IN_DOXYGEN_)
#define ev_uint16_t ...
#define ev_int16_t ...
#else
#error "No way to define ev_uint16_t"
#endif
#ifdef EVENT__HAVE_UINT8_T
#define ev_uint8_t uint8_t
#define ev_int8_t int8_t
#elif defined(EVENT_IN_DOXYGEN_)
#define ev_uint8_t ...
#define ev_int8_t ...
#else
#define ev_uint8_t unsigned char
#define ev_int8_t signed char
#endif
#ifdef EVENT__HAVE_UINTPTR_T
#define ev_uintptr_t uintptr_t
#define ev_intptr_t intptr_t
#elif EVENT__SIZEOF_VOID_P <= 4
#define ev_uintptr_t ev_uint32_t
#define ev_intptr_t ev_int32_t
#elif EVENT__SIZEOF_VOID_P <= 8
#define ev_uintptr_t ev_uint64_t
#define ev_intptr_t ev_int64_t
#elif defined(EVENT_IN_DOXYGEN_)
#define ev_uintptr_t ...
#define ev_intptr_t ...
#else
#error "No way to define ev_uintptr_t"
#endif
#ifdef EVENT__ssize_t
#define ev_ssize_t EVENT__ssize_t
#else
#define ev_ssize_t ssize_t
#endif
/* Note that we define ev_off_t based on the compile-time size of off_t that
* we used to build Libevent, and not based on the current size of off_t.
* (For example, we don't define ev_off_t to off_t.). We do this because
* some systems let you build your software with different off_t sizes
* at runtime, and so putting in any dependency on off_t would risk API
* mismatch.
*/
#ifdef _WIN32
#define ev_off_t ev_int64_t
#elif EVENT__SIZEOF_OFF_T == 8
#define ev_off_t ev_int64_t
#elif EVENT__SIZEOF_OFF_T == 4
#define ev_off_t ev_int32_t
#elif defined(EVENT_IN_DOXYGEN_)
#define ev_off_t ...
#else
#define ev_off_t off_t
#endif
/**@}*/
/* Limits for integer types.
We're making two assumptions here:
- The compiler does constant folding properly.
- The platform does signed arithmetic in two's complement.
*/
/**
@name Limits for integer types
These macros hold the largest or smallest values possible for the
ev_[u]int*_t types.
@{
*/
#ifndef EVENT__HAVE_STDINT_H
#define EV_UINT64_MAX ((((ev_uint64_t)0xffffffffUL) << 32) | 0xffffffffUL)
#define EV_INT64_MAX ((((ev_int64_t) 0x7fffffffL) << 32) | 0xffffffffL)
#define EV_INT64_MIN ((-EV_INT64_MAX) - 1)
#define EV_UINT32_MAX ((ev_uint32_t)0xffffffffUL)
#define EV_INT32_MAX ((ev_int32_t) 0x7fffffffL)
#define EV_INT32_MIN ((-EV_INT32_MAX) - 1)
#define EV_UINT16_MAX ((ev_uint16_t)0xffffUL)
#define EV_INT16_MAX ((ev_int16_t) 0x7fffL)
#define EV_INT16_MIN ((-EV_INT16_MAX) - 1)
#define EV_UINT8_MAX 255
#define EV_INT8_MAX 127
#define EV_INT8_MIN ((-EV_INT8_MAX) - 1)
#else
#define EV_UINT64_MAX UINT64_MAX
#define EV_INT64_MAX INT64_MAX
#define EV_INT64_MIN INT64_MIN
#define EV_UINT32_MAX UINT32_MAX
#define EV_INT32_MAX INT32_MAX
#define EV_INT32_MIN INT32_MIN
#define EV_UINT16_MAX UINT16_MAX
#define EV_INT16_MAX INT16_MAX
#define EV_UINT8_MAX UINT8_MAX
#define EV_INT8_MAX INT8_MAX
#define EV_INT8_MIN INT8_MIN
/** @} */
#endif
/**
@name Limits for SIZE_T and SSIZE_T
@{
*/
#if EVENT__SIZEOF_SIZE_T == 8
#define EV_SIZE_MAX EV_UINT64_MAX
#define EV_SSIZE_MAX EV_INT64_MAX
#elif EVENT__SIZEOF_SIZE_T == 4
#define EV_SIZE_MAX EV_UINT32_MAX
#define EV_SSIZE_MAX EV_INT32_MAX
#elif defined(EVENT_IN_DOXYGEN_)
#define EV_SIZE_MAX ...
#define EV_SSIZE_MAX ...
#else
#error "No way to define SIZE_MAX"
#endif
#define EV_SSIZE_MIN ((-EV_SSIZE_MAX) - 1)
/**@}*/
#ifdef _WIN32
#define ev_socklen_t int
#elif defined(EVENT__socklen_t)
#define ev_socklen_t EVENT__socklen_t
#else
#define ev_socklen_t socklen_t
#endif
#ifdef EVENT__HAVE_STRUCT_SOCKADDR_STORAGE___SS_FAMILY
#if !defined(EVENT__HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY) \
&& !defined(ss_family)
#define ss_family __ss_family
#endif
#endif
/**
* A type wide enough to hold the output of "socket()" or "accept()". On
* Windows, this is an intptr_t; elsewhere, it is an int. */
#ifdef _WIN32
#define evutil_socket_t intptr_t
#else
#define evutil_socket_t int
#endif
/**
* Structure to hold information about a monotonic timer
*
* Use this with evutil_configure_monotonic_time() and
* evutil_gettime_monotonic().
*
* This is an opaque structure; you can allocate one using
* evutil_monotonic_timer_new().
*
* @see evutil_monotonic_timer_new(), evutil_monotonic_timer_free(),
* evutil_configure_monotonic_time(), evutil_gettime_monotonic()
*/
struct evutil_monotonic_timer
#ifdef EVENT_IN_DOXYGEN_
{/*Empty body so that doxygen will generate documentation here.*/}
#endif
;
#define EV_MONOT_PRECISE 1
#define EV_MONOT_FALLBACK 2
/** Format a date string using RFC 1123 format (used in HTTP).
* If `tm` is NULL, current system's time will be used.
* The number of characters written will be returned.
* One should check if the return value is smaller than `datelen` to check if
* the result is truncated or not.
*/
EVENT2_EXPORT_SYMBOL int
evutil_date_rfc1123(char *date, const size_t datelen, const struct tm *tm);
/** Allocate a new struct evutil_monotonic_timer for use with the
* evutil_configure_monotonic_time() and evutil_gettime_monotonic()
* functions. You must configure the timer with
* evutil_configure_monotonic_time() before using it.
*/
EVENT2_EXPORT_SYMBOL
struct evutil_monotonic_timer * evutil_monotonic_timer_new(void);
/** Free a struct evutil_monotonic_timer that was allocated using
* evutil_monotonic_timer_new().
*/
EVENT2_EXPORT_SYMBOL
void evutil_monotonic_timer_free(struct evutil_monotonic_timer *timer);
/** Set up a struct evutil_monotonic_timer; flags can include
* EV_MONOT_PRECISE and EV_MONOT_FALLBACK.
*/
EVENT2_EXPORT_SYMBOL
int evutil_configure_monotonic_time(struct evutil_monotonic_timer *timer,
int flags);
/** Query the current monotonic time from a struct evutil_monotonic_timer
* previously configured with evutil_configure_monotonic_time(). Monotonic
* time is guaranteed never to run in reverse, but is not necessarily epoch-
* based, or relative to any other definite point. Use it to make reliable
* measurements of elapsed time between events even when the system time
* may be changed.
*
* It is not safe to use this funtion on the same timer from multiple
* threads.
*/
EVENT2_EXPORT_SYMBOL
int evutil_gettime_monotonic(struct evutil_monotonic_timer *timer,
struct timeval *tp);
/** Create two new sockets that are connected to each other.
On Unix, this simply calls socketpair(). On Windows, it uses the
loopback network interface on 127.0.0.1, and only
AF_INET,SOCK_STREAM are supported.
(This may fail on some Windows hosts where firewall software has cleverly
decided to keep 127.0.0.1 from talking to itself.)
Parameters and return values are as for socketpair()
*/
EVENT2_EXPORT_SYMBOL
int evutil_socketpair(int d, int type, int protocol, evutil_socket_t sv[2]);
/** Do platform-specific operations as needed to make a socket nonblocking.
@param sock The socket to make nonblocking
@return 0 on success, -1 on failure
*/
EVENT2_EXPORT_SYMBOL
int evutil_make_socket_nonblocking(evutil_socket_t sock);
/** Do platform-specific operations to make a listener socket reusable.
Specifically, we want to make sure that another program will be able
to bind this address right after we've closed the listener.
This differs from Windows's interpretation of "reusable", which
allows multiple listeners to bind the same address at the same time.
@param sock The socket to make reusable
@return 0 on success, -1 on failure
*/
EVENT2_EXPORT_SYMBOL
int evutil_make_listen_socket_reuseable(evutil_socket_t sock);
/** Do platform-specific operations to make a listener port reusable.
Specifically, we want to make sure that multiple programs which also
set the same socket option will be able to bind, listen at the same time.
This is a feature available only to Linux 3.9+
@param sock The socket to make reusable
@return 0 on success, -1 on failure
*/
EVENT2_EXPORT_SYMBOL
int evutil_make_listen_socket_reuseable_port(evutil_socket_t sock);
/** Do platform-specific operations as needed to close a socket upon a
successful execution of one of the exec*() functions.
@param sock The socket to be closed
@return 0 on success, -1 on failure
*/
EVENT2_EXPORT_SYMBOL
int evutil_make_socket_closeonexec(evutil_socket_t sock);
/** Do the platform-specific call needed to close a socket returned from
socket() or accept().
@param sock The socket to be closed
@return 0 on success, -1 on failure
*/
EVENT2_EXPORT_SYMBOL
int evutil_closesocket(evutil_socket_t sock);
#define EVUTIL_CLOSESOCKET(s) evutil_closesocket(s)
/** Do platform-specific operations, if possible, to make a tcp listener
* socket defer accept()s until there is data to read.
*
* Not all platforms support this. You don't want to do this for every
* listener socket: only the ones that implement a protocol where the
* client transmits before the server needs to respond.
*
* @param sock The listening socket to to make deferred
* @return 0 on success (whether the operation is supported or not),
* -1 on failure
*/
EVENT2_EXPORT_SYMBOL
int evutil_make_tcp_listen_socket_deferred(evutil_socket_t sock);
#ifdef _WIN32
/** Return the most recent socket error. Not idempotent on all platforms. */
#define EVUTIL_SOCKET_ERROR() WSAGetLastError()
/** Replace the most recent socket error with errcode */
#define EVUTIL_SET_SOCKET_ERROR(errcode) \
do { WSASetLastError(errcode); } while (0)
/** Return the most recent socket error to occur on sock. */
EVENT2_EXPORT_SYMBOL
int evutil_socket_geterror(evutil_socket_t sock);
/** Convert a socket error to a string. */
EVENT2_EXPORT_SYMBOL
const char *evutil_socket_error_to_string(int errcode);
#elif defined(EVENT_IN_DOXYGEN_)
/**
@name Socket error functions
These functions are needed for making programs compatible between
Windows and Unix-like platforms.
You see, Winsock handles socket errors differently from the rest of
the world. Elsewhere, a socket error is like any other error and is
stored in errno. But winsock functions require you to retrieve the
error with a special function, and don't let you use strerror for
the error codes. And handling EWOULDBLOCK is ... different.
@{
*/
/** Return the most recent socket error. Not idempotent on all platforms. */
#define EVUTIL_SOCKET_ERROR() ...
/** Replace the most recent socket error with errcode */
#define EVUTIL_SET_SOCKET_ERROR(errcode) ...
/** Return the most recent socket error to occur on sock. */
#define evutil_socket_geterror(sock) ...
/** Convert a socket error to a string. */
#define evutil_socket_error_to_string(errcode) ...
/**@}*/
#else
#define EVUTIL_SOCKET_ERROR() (errno)
#define EVUTIL_SET_SOCKET_ERROR(errcode) \
do { errno = (errcode); } while (0)
#define evutil_socket_geterror(sock) (errno)
#define evutil_socket_error_to_string(errcode) (strerror(errcode))
#endif
/**
* @name Manipulation macros for struct timeval.
*
* We define replacements
* for timeradd, timersub, timerclear, timercmp, and timerisset.
*
* @{
*/
#ifdef EVENT__HAVE_TIMERADD
#define evutil_timeradd(tvp, uvp, vvp) timeradd((tvp), (uvp), (vvp))
#define evutil_timersub(tvp, uvp, vvp) timersub((tvp), (uvp), (vvp))
#else
#define evutil_timeradd(tvp, uvp, vvp) \
do { \
(vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \
(vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \
if ((vvp)->tv_usec >= 1000000) { \
(vvp)->tv_sec++; \
(vvp)->tv_usec -= 1000000; \
} \
} while (0)
#define evutil_timersub(tvp, uvp, vvp) \
do { \
(vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
(vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
if ((vvp)->tv_usec < 0) { \
(vvp)->tv_sec--; \
(vvp)->tv_usec += 1000000; \
} \
} while (0)
#endif /* !EVENT__HAVE_TIMERADD */
#ifdef EVENT__HAVE_TIMERCLEAR
#define evutil_timerclear(tvp) timerclear(tvp)
#else
#define evutil_timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0
#endif
/**@}*/
/** Return true iff the tvp is related to uvp according to the relational
* operator cmp. Recognized values for cmp are ==, <=, <, >=, and >. */
#define evutil_timercmp(tvp, uvp, cmp) \
(((tvp)->tv_sec == (uvp)->tv_sec) ? \
((tvp)->tv_usec cmp (uvp)->tv_usec) : \
((tvp)->tv_sec cmp (uvp)->tv_sec))
#ifdef EVENT__HAVE_TIMERISSET
#define evutil_timerisset(tvp) timerisset(tvp)
#else
#define evutil_timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
#endif
/** Replacement for offsetof on platforms that don't define it. */
#ifdef offsetof
#define evutil_offsetof(type, field) offsetof(type, field)
#else
#define evutil_offsetof(type, field) ((off_t)(&((type *)0)->field))
#endif
/* big-int related functions */
/** Parse a 64-bit value from a string. Arguments are as for strtol. */
EVENT2_EXPORT_SYMBOL
ev_int64_t evutil_strtoll(const char *s, char **endptr, int base);
/** Replacement for gettimeofday on platforms that lack it. */
#ifdef EVENT__HAVE_GETTIMEOFDAY
#define evutil_gettimeofday(tv, tz) gettimeofday((tv), (tz))
#else
struct timezone;
EVENT2_EXPORT_SYMBOL
int evutil_gettimeofday(struct timeval *tv, struct timezone *tz);
#endif
/** Replacement for snprintf to get consistent behavior on platforms for
which the return value of snprintf does not conform to C99.
*/
EVENT2_EXPORT_SYMBOL
int evutil_snprintf(char *buf, size_t buflen, const char *format, ...)
#ifdef __GNUC__
__attribute__((format(printf, 3, 4)))
#endif
;
/** Replacement for vsnprintf to get consistent behavior on platforms for
which the return value of snprintf does not conform to C99.
*/
EVENT2_EXPORT_SYMBOL
int evutil_vsnprintf(char *buf, size_t buflen, const char *format, va_list ap)
#ifdef __GNUC__
__attribute__((format(printf, 3, 0)))
#endif
;
/** Replacement for inet_ntop for platforms which lack it. */
EVENT2_EXPORT_SYMBOL
const char *evutil_inet_ntop(int af, const void *src, char *dst, size_t len);
/** Replacement for inet_pton for platforms which lack it. */
EVENT2_EXPORT_SYMBOL
int evutil_inet_pton(int af, const char *src, void *dst);
struct sockaddr;
/** Parse an IPv4 or IPv6 address, with optional port, from a string.
Recognized formats are:
- [IPv6Address]:port
- [IPv6Address]
- IPv6Address
- IPv4Address:port
- IPv4Address
If no port is specified, the port in the output is set to 0.
@param str The string to parse.
@param out A struct sockaddr to hold the result. This should probably be
a struct sockaddr_storage.
@param outlen A pointer to the number of bytes that that 'out' can safely
hold. Set to the number of bytes used in 'out' on success.
@return -1 if the address is not well-formed, if the port is out of range,
or if out is not large enough to hold the result. Otherwise returns
0 on success.
*/
EVENT2_EXPORT_SYMBOL
int evutil_parse_sockaddr_port(const char *str, struct sockaddr *out, int *outlen);
/** Compare two sockaddrs; return 0 if they are equal, or less than 0 if sa1
* preceeds sa2, or greater than 0 if sa1 follows sa2. If include_port is
* true, consider the port as well as the address. Only implemented for
* AF_INET and AF_INET6 addresses. The ordering is not guaranteed to remain
* the same between Libevent versions. */
EVENT2_EXPORT_SYMBOL
int evutil_sockaddr_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2,
int include_port);
/** As strcasecmp, but always compares the characters in locale-independent
ASCII. That's useful if you're handling data in ASCII-based protocols.
*/
EVENT2_EXPORT_SYMBOL
int evutil_ascii_strcasecmp(const char *str1, const char *str2);
/** As strncasecmp, but always compares the characters in locale-independent
ASCII. That's useful if you're handling data in ASCII-based protocols.
*/
EVENT2_EXPORT_SYMBOL
int evutil_ascii_strncasecmp(const char *str1, const char *str2, size_t n);
/* Here we define evutil_addrinfo to the native addrinfo type, or redefine it
* if this system has no getaddrinfo(). */
#ifdef EVENT__HAVE_STRUCT_ADDRINFO
#define evutil_addrinfo addrinfo
#else
/** A definition of struct addrinfo for systems that lack it.
(This is just an alias for struct addrinfo if the system defines
struct addrinfo.)
*/
struct evutil_addrinfo {
int ai_flags; /* AI_PASSIVE, AI_CANONNAME, AI_NUMERICHOST */
int ai_family; /* PF_xxx */
int ai_socktype; /* SOCK_xxx */
int ai_protocol; /* 0 or IPPROTO_xxx for IPv4 and IPv6 */
size_t ai_addrlen; /* length of ai_addr */
char *ai_canonname; /* canonical name for nodename */
struct sockaddr *ai_addr; /* binary address */
struct evutil_addrinfo *ai_next; /* next structure in linked list */
};
#endif
/** @name evutil_getaddrinfo() error codes
These values are possible error codes for evutil_getaddrinfo() and
related functions.
@{
*/
#if defined(EAI_ADDRFAMILY) && defined(EVENT__HAVE_GETADDRINFO)
#define EVUTIL_EAI_ADDRFAMILY EAI_ADDRFAMILY
#else
#define EVUTIL_EAI_ADDRFAMILY -901
#endif
#if defined(EAI_AGAIN) && defined(EVENT__HAVE_GETADDRINFO)
#define EVUTIL_EAI_AGAIN EAI_AGAIN
#else
#define EVUTIL_EAI_AGAIN -902
#endif
#if defined(EAI_BADFLAGS) && defined(EVENT__HAVE_GETADDRINFO)
#define EVUTIL_EAI_BADFLAGS EAI_BADFLAGS
#else
#define EVUTIL_EAI_BADFLAGS -903
#endif
#if defined(EAI_FAIL) && defined(EVENT__HAVE_GETADDRINFO)
#define EVUTIL_EAI_FAIL EAI_FAIL
#else
#define EVUTIL_EAI_FAIL -904
#endif
#if defined(EAI_FAMILY) && defined(EVENT__HAVE_GETADDRINFO)
#define EVUTIL_EAI_FAMILY EAI_FAMILY
#else
#define EVUTIL_EAI_FAMILY -905
#endif
#if defined(EAI_MEMORY) && defined(EVENT__HAVE_GETADDRINFO)
#define EVUTIL_EAI_MEMORY EAI_MEMORY
#else
#define EVUTIL_EAI_MEMORY -906
#endif
/* This test is a bit complicated, since some MS SDKs decide to
* remove NODATA or redefine it to be the same as NONAME, in a
* fun interpretation of RFC 2553 and RFC 3493. */
#if defined(EAI_NODATA) && defined(EVENT__HAVE_GETADDRINFO) && (!defined(EAI_NONAME) || EAI_NODATA != EAI_NONAME)
#define EVUTIL_EAI_NODATA EAI_NODATA
#else
#define EVUTIL_EAI_NODATA -907
#endif
#if defined(EAI_NONAME) && defined(EVENT__HAVE_GETADDRINFO)
#define EVUTIL_EAI_NONAME EAI_NONAME
#else
#define EVUTIL_EAI_NONAME -908
#endif
#if defined(EAI_SERVICE) && defined(EVENT__HAVE_GETADDRINFO)
#define EVUTIL_EAI_SERVICE EAI_SERVICE
#else
#define EVUTIL_EAI_SERVICE -909
#endif
#if defined(EAI_SOCKTYPE) && defined(EVENT__HAVE_GETADDRINFO)
#define EVUTIL_EAI_SOCKTYPE EAI_SOCKTYPE
#else
#define EVUTIL_EAI_SOCKTYPE -910
#endif
#if defined(EAI_SYSTEM) && defined(EVENT__HAVE_GETADDRINFO)
#define EVUTIL_EAI_SYSTEM EAI_SYSTEM
#else
#define EVUTIL_EAI_SYSTEM -911
#endif
#define EVUTIL_EAI_CANCEL -90001
#if defined(AI_PASSIVE) && defined(EVENT__HAVE_GETADDRINFO)
#define EVUTIL_AI_PASSIVE AI_PASSIVE
#else
#define EVUTIL_AI_PASSIVE 0x1000
#endif
#if defined(AI_CANONNAME) && defined(EVENT__HAVE_GETADDRINFO)
#define EVUTIL_AI_CANONNAME AI_CANONNAME
#else
#define EVUTIL_AI_CANONNAME 0x2000
#endif
#if defined(AI_NUMERICHOST) && defined(EVENT__HAVE_GETADDRINFO)
#define EVUTIL_AI_NUMERICHOST AI_NUMERICHOST
#else
#define EVUTIL_AI_NUMERICHOST 0x4000
#endif
#if defined(AI_NUMERICSERV) && defined(EVENT__HAVE_GETADDRINFO)
#define EVUTIL_AI_NUMERICSERV AI_NUMERICSERV
#else
#define EVUTIL_AI_NUMERICSERV 0x8000
#endif
#if defined(AI_V4MAPPED) && defined(EVENT__HAVE_GETADDRINFO)
#define EVUTIL_AI_V4MAPPED AI_V4MAPPED
#else
#define EVUTIL_AI_V4MAPPED 0x10000
#endif
#if defined(AI_ALL) && defined(EVENT__HAVE_GETADDRINFO)
#define EVUTIL_AI_ALL AI_ALL
#else
#define EVUTIL_AI_ALL 0x20000
#endif
#if defined(AI_ADDRCONFIG) && defined(EVENT__HAVE_GETADDRINFO)
#define EVUTIL_AI_ADDRCONFIG AI_ADDRCONFIG
#else
#define EVUTIL_AI_ADDRCONFIG 0x40000
#endif
/**@}*/
struct evutil_addrinfo;
/**
* This function clones getaddrinfo for systems that don't have it. For full
* details, see RFC 3493, section 6.1.
*
* Limitations:
* - When the system has no getaddrinfo, we fall back to gethostbyname_r or
* gethostbyname, with their attendant issues.
* - The AI_V4MAPPED and AI_ALL flags are not currently implemented.
*
* For a nonblocking variant, see evdns_getaddrinfo.
*/
EVENT2_EXPORT_SYMBOL
int evutil_getaddrinfo(const char *nodename, const char *servname,
const struct evutil_addrinfo *hints_in, struct evutil_addrinfo **res);
/** Release storage allocated by evutil_getaddrinfo or evdns_getaddrinfo. */
EVENT2_EXPORT_SYMBOL
void evutil_freeaddrinfo(struct evutil_addrinfo *ai);
EVENT2_EXPORT_SYMBOL
const char *evutil_gai_strerror(int err);
/** Generate n bytes of secure pseudorandom data, and store them in buf.
*
* Current versions of Libevent use an ARC4-based random number generator,
* seeded using the platform's entropy source (/dev/urandom on Unix-like
* systems; CryptGenRandom on Windows). This is not actually as secure as it
* should be: ARC4 is a pretty lousy cipher, and the current implementation
* provides only rudimentary prediction- and backtracking-resistance. Don't
* use this for serious cryptographic applications.
*/
EVENT2_EXPORT_SYMBOL
void evutil_secure_rng_get_bytes(void *buf, size_t n);
/**
* Seed the secure random number generator if needed, and return 0 on
* success or -1 on failure.
*
* It is okay to call this function more than once; it will still return
* 0 if the RNG has been successfully seeded and -1 if it can't be
* seeded.
*
* Ordinarily you don't need to call this function from your own code;
* Libevent will seed the RNG itself the first time it needs good random
* numbers. You only need to call it if (a) you want to double-check
* that one of the seeding methods did succeed, or (b) you plan to drop
* the capability to seed (by chrooting, or dropping capabilities, or
* whatever), and you want to make sure that seeding happens before your
* program loses the ability to do it.
*/
EVENT2_EXPORT_SYMBOL
int evutil_secure_rng_init(void);
/**
* Set a filename to use in place of /dev/urandom for seeding the secure
* PRNG. Return 0 on success, -1 on failure.
*
* Call this function BEFORE calling any other initialization or RNG
* functions.
*
* (This string will _NOT_ be copied internally. Do not free it while any
* user of the secure RNG might be running. Don't pass anything other than a
* real /dev/...random device file here, or you might lose security.)
*
* This API is unstable, and might change in a future libevent version.
*/
EVENT2_EXPORT_SYMBOL
int evutil_secure_rng_set_urandom_device_file(char *fname);
/** Seed the random number generator with extra random bytes.
You should almost never need to call this function; it should be
sufficient to invoke evutil_secure_rng_init(), or let Libevent take
care of calling evutil_secure_rng_init() on its own.
If you call this function as a _replacement_ for the regular
entropy sources, then you need to be sure that your input
contains a fairly large amount of strong entropy. Doing so is
notoriously hard: most people who try get it wrong. Watch out!
@param dat a buffer full of a strong source of random numbers
@param datlen the number of bytes to read from datlen
*/
EVENT2_EXPORT_SYMBOL
void evutil_secure_rng_add_bytes(const char *dat, size_t datlen);
#ifdef __cplusplus
}
#endif
#endif /* EVENT1_EVUTIL_H_INCLUDED_ */

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third/inc/libevent/include/event2/visibility.h Normal file
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@ -0,0 +1,50 @@
/* -*- Mode: C; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_VISIBILITY_H_INCLUDED_
#define EVENT2_VISIBILITY_H_INCLUDED_
#include <event2/event-config.h>
#if defined(event_EXPORTS) || defined(event_extra_EXPORTS) || defined(event_core_EXPORTS)
# if defined (__SUNPRO_C) && (__SUNPRO_C >= 0x550)
# define EVENT2_EXPORT_SYMBOL __global
# elif defined __GNUC__
# define EVENT2_EXPORT_SYMBOL __attribute__ ((visibility("default")))
# elif defined(_MSC_VER)
# define EVENT2_EXPORT_SYMBOL extern __declspec(dllexport)
# else
# define EVENT2_EXPORT_SYMBOL /* unknown compiler */
# endif
#else
# if defined(EVENT__NEED_DLLIMPORT) && defined(_MSC_VER) && !defined(EVENT_BUILDING_REGRESS_TEST)
# define EVENT2_EXPORT_SYMBOL extern __declspec(dllimport)
# else
# define EVENT2_EXPORT_SYMBOL
# endif
#endif
#endif /* EVENT2_VISIBILITY_H_INCLUDED_ */

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third/inc/libevent/evrpc.h → third/inc/libevent/include/evrpc.h
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third/inc/libevent/evutil.h → third/inc/libevent/include/evutil.h
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third/inc/libevent/include.am → third/inc/libevent/include/include.am
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