网络编程之路---6

来源：互联网发布：c 程序员招聘要求编辑：程序博客网时间：2024/06/11 11:21

int sendto{SOCKET s, const char* buf, int len, int flags, const struct sockaddr* to, int tolen}

指定一个socket句柄发送缓冲区发送缓冲区长度函数调用方式接收数据的目标地址指定地址长度

客户端：

#include <WinSock2.h>#include <stdio.h>#pragma comment(lib, "WS2_32.lib")//udp只需知道服务器的socketint main(int argc, char *argv[]){WSADATA wsaData;WSAStartup(MAKEWORD(2,2),&wsaData); //Windows socket apiSOCKET SendSocket;SendSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);int Port = 27051;char SendBuf[1054];int bufLen = 1054;SOCKADDR_IN RecvAddr; //服务器地址RecvAddr.sin_family = AF_INET;RecvAddr.sin_port = htons(Port);RecvAddr.sin_addr.S_un.S_addr = inet_addr("222.18.167.206");printf("sending a data to server\n");sendto(SendSocket, SendBuf, bufLen, 0, (SOCKADDR*)&RecvAddr, sizeof(RecvAddr));printf("Finishing sending data\n");closesocket(SendSocket);printf("exiting\n");WSACleanup();//socket句柄 传输数据的缓冲区 缓冲区长度 调用函数的方式 接收数据的目标地址 地址长度return 0;}

int recvfrom(SOCKET s, char* buf, int len, int flags, struct sockaddr* from, int *fromlen);

socket句柄要接收数据的缓冲区要接收数据的长度调用函数的方式发送数据的地址发送数据地址的长度

服务器：

/*#include "stdafx.h"*/#include <WinSock2.h>#include <stdio.h>#pragma comment(lib, "WS2_32.lib")int main(int argc, char* argv[]){WSADATA wsaData;int resValue;WSAStartup(MAKEWORD(2,2), &wsaData);SOCKET RecvSocket;RecvSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);int Port = 27051;char buf[1024];int bufLen = 1024;SOCKADDR_IN recvAddr; //服务端的地址recvAddr.sin_family = AF_INET;recvAddr.sin_port = htons(Port);recvAddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY);resValue = bind(RecvSocket, (const SOCKADDR*)&recvAddr, sizeof(recvAddr));if (resValue == SOCKET_ERROR){printf("bind failed...\n");return -1;}SOCKADDR_IN sendAddr;int sendLen = sizeof(sendAddr);printf("receiving data...\n");recvfrom(RecvSocket, buf, bufLen, 0, (SOCKADDR*)&sendAddr, &sendLen);printf("finished receiving...\n");closesocket(RecvSocket);printf("exiting");WSACleanup();return 0;}

0 0