C++udp通信(精品文檔).doc

1、/ initsock.h 文件#include #pragma comment(lib, WS2_32)/ 鏈接到WS2_32.libclass CInitSockpublic:CInitSock(BYTE minorVer = 2, BYTE majorVer = 2)/ 初始化 WS2_32.dll WSADATA wsaData;WORD sockVersion = MAKEWORD(minorVer, majorVer); if(:WSAStartup(sockVersion, &wsaData) != 0)exit(0);CInitSock():WSACleanup();/ UDPC

2、lient 文件#include ./common/InitSock.h#include CInitSock initSock;/ 初始化Winsock庫int main()/ 創(chuàng)建套節(jié)字SOCKET s = :socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);if(s = INVALID_SOCKET)printf(Failed socket() %d n, :WSAGetLastError();return 0;/ 也可以在這里調(diào)用 bind 函數(shù)綁定一個(gè)本地地址/ 否則系統(tǒng)將會(huì)自動(dòng)安排/ 填寫遠(yuǎn)程地址信息sockaddr_in addr;addr.sin_

3、family = AF_INET;addr.sin_port = htons(4567);/ 注意，這里要填寫服務(wù)器程序所在機(jī)器的IP 地址/ 如果你的計(jì)算機(jī)沒有聯(lián)網(wǎng)，直接使用127.0.0.1 即可addr.sin_addr.S_un.S_addr = inet_addr(127.0.0.1);/ 發(fā)送數(shù)據(jù)char szText = TCP Server Demo! rn;:sendto(s, szText, strlen(szText), 0, (sockaddr*)&addr, sizeof(addr);:closesocket(s);return 0;/ UDPServer.cpp 文

4、件#include ./common/InitSock.h#include CInitSock initSock;/ 初始化 Winsock 庫int main()/ 創(chuàng)建套節(jié)字SOCKET s = :socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);if(s = INVALID_SOCKET)printf(Failed socket() n);return 0;/ 填充 sockaddr_in 結(jié)構(gòu)sockaddr_in sin;sin.sin_family = AF_INET;sin.sin_port = htons(4567);sin.sin_addr.S_un.S_addr = INADDR_ANY;/ 綁定這個(gè)套節(jié)字到一個(gè)本地地址if(:bind(s, (LPSOCKADDR)&sin, sizeof(sin) = SOCKET_ERROR)printf(Failed bind() n);return 0;/ 接收數(shù)據(jù)char buff1024;sockaddr_in addr;int nLen = sizeof(addr);while(TRUE)int nRecv = :recvfrom(s, buff, 1024, 0, (sockaddr*)&addr, &nLen);if(nRecv 0)buffnRe