Linux下的socket编程源码

#include <sys/types.h> /* See NOTES */ #include <sys/socket.h> #include <string.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <unistd.h> #include <stdio.h> #include <signal.h> /* socket * bind * listen * accept * send/recv */ #define SERVER_PORT 8888 #define BACKLOG 10 int main(int argc, char **argv) { int iSocketServer; int iSocketClient; struct sockaddr_in tSocketServerAddr; struct sockaddr_in tSocketClientAddr; int iRet; int iAddrLen; int iRecvLen; unsigned char ucRecvBuf[1000]; int iClientNum = -1; signal(SIGCHLD,SIG_IGN); iSocketServer = socket(AF_INET, SOCK_STREAM, 0); if (-1 == iSocketServer) { printf("socket error!\n"); return -1; } tSocketServerAddr.sin_family = AF_INET; tSocketServerAddr.sin_port = htons(SERVER_PORT); /* host to net, short */ tSocketServerAddr.sin_addr.s_addr = INADDR_ANY; memset(tSocketServerAddr.sin_zero, 0, 8); iRet = bind(iSocketServer, (const struct sockaddr *)&tSocketServerAddr, sizeof(struct sockaddr)); if (-1 == iRet) { printf("bind error!\n"); return -1; } iRet = listen(iSocketServer, BACKLOG); if (-1 == iRet) { printf("listen error!\n"); return -1; } while (1) { iAddrLen = sizeof(struct sockaddr); iSocketClient = accept(iSocketServer, (struct sockaddr *)&tSocketClientAddr, &iAddrLen); if (-1 != iSocketClient) { iClientNum++; printf("Get connect from client %d : %s\n", iClientNum, inet_ntoa(tSocketClientAddr.sin_addr)); if (!fork()) { /* 子进程的源码 */ while (1) { /* 接收客户端发来的数据并显示出来 */ iRecvLen = recv(iSocketClient, ucRecvBuf, 999, 0); if (iRecvLen <= 0) { close(iSocketClient); return -1; } else { ucRecvBuf[iRecvLen] = '\0'; printf("Get Msg From Client %d: %s\n", iClientNum, ucRecvBuf); } } } } } close(iSocketServer); return 0; }