本文实例讲述了C语言实现socket简单通信的方法，分享给大家供大家参考。具体实现方法如下：
服务器端代码如下：
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/*============================================================================Name : server.cAuthor : kingVersion :Copyright : Your copyright noticeDescription : Hello World in C, Ansi-style============================================================================*/#include <stdlib.h>#include <pthread.h>#include <sys/socket.h>#include <sys/types.h>#include <netinet/in.h>#include <arpa/inet.h> /* inet(3) functions */#include <stdlib.h>#include <errno.h>#include <stdio.h>#include <string.h>int handle(int point);int main(void) {int sfd, ind;struct sockaddr_in addr;struct sockaddr_in clent;char resv[1024], sendbuf[1024];char buf[1024];char * myaddr = "192.168.231.128";int ret; // 返回值设置socklen_t lent;int pid;addr.sin_family = AF_INET; //IPv4 Internet protocolsaddr.sin_port = htons(5050); //这里输入服务器端口号addr.sin_addr.s_addr = inet_addr(myaddr);; //INADDR_ANY表示本机IP//獲取socket描述符，IPV4asdprintf("socket start \n");sfd = socket(AF_INET, SOCK_STREAM, 0);if (sfd < 0) {printf("socket error \n");return -1;}printf("bind start \n");//将套接子与指定端口链接if (bind(sfd, (struct sockaddr *) &addr, sizeof(struct sockaddr)) < 0) {printf("bind error \n");return -1;}//监听套接子printf("listen start \n");if (listen(sfd, 1024) < 0) {printf("listen error \n");return -1;}for (;;) {//接受来自客户端的信息printf("accept start \n");memset(&clent, 0, sizeof(clent));lent = sizeof(clent);ind = accept(sfd, (struct sockaddr *) &clent, &lent);if (ind < 0) {printf("accept error %d \n", ind);return -1;}printf("infor \n");printf("clent addr%s porit %d\n",inet_ntop(AF_INET, &clent.sin_addr, buf, sizeof(buf)),ntohs(clent.sin_port));pid = fork();if (pid == 0) {//子进程close(sfd);handle(ind);} else if (pid < 0) {//errorclose(ind);} else {//父进程}}return EXIT_SUCCESS;}int handle(int point) {int retn;char buf[1024];for (;;) {retn = read(point, buf, sizeof(buf));if (retn < 0) {printf("read error \n");close(point);break;} else if (retn == 0) {printf("client exit \n");close(point);break;}printf("client:%s\n", buf);if (strcmp("exit", buf) == 0) {printf("exit \n");close(point);return 0;}}return 0;} |
客户端代码如下：
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/* ============================================================================ Name : client.c Author : king Version : Copyright : Your copyright notice Description : Hello World in C, Ansi-style ============================================================================ */#include <stdio.h>#include <stdlib.h>#include <sys/socket.h>#include <netinet/in.h>#include <arpa/inet.h> /* inet(3) functions */int handle(int fd);int main(void) { int nsd; char buf[1024]; char * myaddr = "192.168.231.128"; struct sockaddr_in addr; printf("welcome to echo client\n"); nsd = socket(AF_INET, SOCK_STREAM, 0); printf("connect start1 \n"); //bzero(addr, sizeof(*addr)); memset(&addr,0,sizeof(addr)); printf("connect start2 \n"); addr.sin_family = AF_INET; addr.sin_port = htons(5050); addr.sin_addr.s_addr=inet_addr(myaddr); printf("connect start3 \n"); if (connect(nsd, (struct sockaddr *)&addr, sizeof(struct sockaddr)) < 0) { printf("connect error \n"); return -1; } sleep(5); printf("handle start\n"); handle(nsd); close(nsd); return EXIT_SUCCESS;}int handle(int fd) { char sendl[1024], rev[1024]; int retn; for (;;) { memset(sendl,0,sizeof(sendl)); memset(rev,0,sizeof(rev)); if (fgets(sendl, 1024, stdin) == NULL) { break; } // printf("wirte start\n"); write(fd, sendl, strlen(sendl)); read(fd, rev,strlen(rev)); } return 0;} |
注意：
int connect(int sockfd, const struct sockaddr *addr,socklen_t addrlen);
记住一定是值 addrlen
accept socklen_t *addrlen要是一个指针
希望本文所述对大家C语言网络程序设计的学习有所帮助。
