Boost实现简单的udp代理服务器
[来源] 达内 [编辑] 达内 [时间]2012-10-16
这段时间在开发代理服务器,这方面的资料了解的比较多,这里我总结下udp代理服务的实现,也方便我以后查阅
这段时间在开发代理服务器,这方面的资料了解的比较多,这里我总结下udp代理服务的实现,也方便我以后查阅。
< h1 style="margin: 0px; padding: 0px; font-weight: bold; color: rgb(0, 0, 0); line-height: 1.5; font-family: verdana, Arial, Helvetica, sans-serif; font-style: normal; font-variant: normal; letter-spacing: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); " class="cjk">
一、通信模型
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
1、非代理情况下的通信模型
< p style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
这是典型的C-S通信模型,客户端和服务器直接交互。
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
2、代理情况下的通信模型
< p style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
这种情况下,服务器和客户端不是直接交互,而是通过代理服务器进行的,代理服务器负责把客户端发来的请求转发给服务器,并把服务的回应返回给客户端。
< h1 style="margin: 0px; padding: 0px; font-weight: bold; color: rgb(0, 0, 0); line-height: 1.5; font-family: verdana, Arial, Helvetica, sans-serif; font-style: normal; font-variant: normal; letter-spacing: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); " class="cjk">
二、
UDP服务器和客户端
demo
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
上面分析了通信模型,这里给出一个echo的服务器和客户端代码以供下文使用。
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
1、服务端demo
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
这里有一个python实现的echo服务器,代码如下:
< div style="margin: 5px 0px; padding: 5px; background-color: rgb(245, 245, 245); font-family: 'Courier New'; font-size: 12px; border: 1px solid rgb(204, 204, 204); overflow: auto; color: rgb(51, 51, 51); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; " class="cnblogs_code">
#
! /usr/bin/python #
a simple udp server
import socket, traceback s
= socket.socket(socket.AF_INET, socket.SOCK_DGRAM) s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR,
1) s.bind(("
"
,12345)) while
True: try
: message, address = s.recvfrom(1024)
print "
Got data from"
, address print
message s.sendto(message, address) except
(KeyboardInterrupt, SystemExit):
raise except
: traceback.print_exc()
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
服务端把收到的数据输出并发给客户端。
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
2、客户端demo
< div style="margin: 5px 0px; padding: 5px; background-color: rgb(245, 245, 245); font-family: 'Courier New'; font-size: 12px; border: 1px solid rgb(204, 204, 204); overflow: auto; color: rgb(51, 51, 51); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; " class="cnblogs_code">
#
! /usr/bin/python #
a simple udp client
import socket,time client
= socket.socket(socket.AF_INET, socket.SOCK_DGRAM) client.connect((
'
', 12345))
while
True: client.sendall('
3'
) print
time.time(),' : send success
'
print time.time(),
" : "
,client.recv(1024) time.sleep(3
)
#client.close()
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
客户端负责给服务端发数据并接收服务器返回的数据。
< h1 style="margin: 0px; padding: 0px; font-weight: bold; color: rgb(0, 0, 0); line-height: 1.5; font-family: verdana, Arial, Helvetica, sans-serif; font-style: normal; font-variant: normal; letter-spacing: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); " class="cjk">
三、
UDP代理服务器
demo
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
这里采用boost库实现,用asio中的异步机制。
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
1、成员变量及参数说明
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
类名称:
m_udpProxyServer
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
私有成员:
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
ip::udp::socket downstream_socket_; //代理服务器和客户端的链接
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
ip::udp::socket upstream_socket_; //代理服务器和远端服务器(echo server)的链接
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
string _remotehost; // 远端服务器(echo server
)的ip地址
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
int _remoteport; //远端服务器(echo server)的端口
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
ip::udpndpoint downstream_remoteUdpEndpoint; //客户端信息
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
ip::udpndpoint upstream_remoteUdpEndpoint; //服务端信息
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
unsigned char downstream_data_[max_data_length]; //上传链路buffer
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
unsigned char upstream_data_[max_data_length]; //下载链路buffer
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
2、启动本地服务
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
代理服务器在这个模型中既充当客户端的服务器,又充当远端服务器(echo server
)的客户端,所以代理服务器既要有本地监听端口供客户端连接,又要向远端服务器(echo server)发起链接,转发客户端发来的数据。
< div style="margin: 5px 0px; padding: 5px; background-color: rgb(245, 245, 245); font-family: 'Courier New'; font-size: 12px; border: 1px solid rgb(204, 204, 204); overflow: auto; color: rgb(51, 51, 51); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; " class="cnblogs_code">
View Code
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
< p lang="zh-CN" style="margin: 10px auto; padding: 0px; text-indent: 0px; color: rgb(51, 51, 51); font-family: verdana, Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 25px; orphans: 2; text-align: -webkit-auto; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">
< div style="margin: 5px 0px; padding: 5px; background-color: rgb(245, 245, 245); font-family: 'Courier New'; font-size: 12px; border: 1px solid rgb(204, 204, 204); overflow: auto; color: rgb(51, 51, 51); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; " class="cnblogs_code">