Socket-基础客户端/服务器数据传输

来源：互联网发布：搏击俱乐部知乎编辑：程序博客网时间：2024/06/05 13:28

客户端发送代码

/*回射客户端*/#include<unistd.h>#include<stdio.h>#include<sys/socket.h>#include<sys/types.h>#include<stdlib.h>#include<stdio.h>#include<errno.h>#include<netinet/in.h>#include<arpa/inet.h>#include<string.h>#define ERR_EXIT(m) (perror(m),exit(EXIT_FAILURE))/*do{perror(m);exit(EXIT_FAILURE);} while(0))///错误宏定义*/int main(void){//创建套接口int sock;if((sock=socket(PF_INET,SOCK_STREAM,IPPROTO_TCP))<0)/*if((sock=socket(PF_INET,SOCK_TREAM,0))<0)*/ERR_EXIT("socket");struct sockaddr_in servaddr;//IPv4地址结构memset(&servaddr,0,sizeof(servaddr));//服务器地址//初始化地址servaddr.sin_family=AF_INET;//地址族servaddr.sin_port=htons(5188);//端口号（需要两个字节的网络端口号）servaddr.sin_addr.s_addr=inet_addr("192.168.241.129");//地址（选用本机任意地址）/*servaddr.sin_addr.s_addr=inet_addr("192.168.241.129");//选用指定地址*//*inet_aton("192.168.241.129",&servaddr.sin_addr);//将本机地址转换为网络地址*///连接if(connect(sock,(struct sockaddr*)&servaddr,sizeof(servaddr))<0)ERR_EXIT("connect");char sendbuf[1024]={0};char recvbuf[1024]={0};while(fgets(sendbuf,sizeof(sendbuf),stdin)!=NULL){write(sock,sendbuf,strlen(sendbuf));//发送数据read(sock,recvbuf,sizeof(recvbuf));fputs(recvbuf,stdout);memset(sendbuf,0,sizeof(sendbuf));memset(recvbuf,0,sizeof(recvbuf));}close(sock);return 0;}

服务器接收代码

/*回射服务器*/#include<unistd.h>#include<stdio.h>#include<sys/socket.h>#include<sys/types.h>#include<stdlib.h>#include<stdio.h>#include<errno.h>#include<netinet/in.h>#include<arpa/inet.h>#include<string.h>#define ERR_EXIT(m) (perror(m),exit(EXIT_FAILURE))/*do{perror(m);exit(EXIT_FAILURE);} while(0))///错误宏定义*/int main(void){//创建套接口int listenfd;if((listenfd=socket(PF_INET,SOCK_STREAM,IPPROTO_TCP))<0)/*if((listenfd=socket(PF_INET,SOCK_TREAM,0))<0)*/ERR_EXIT("socket");struct sockaddr_in servaddr;//IPv4地址结构memset(&servaddr,0,sizeof(servaddr));//服务器地址//初始化地址servaddr.sin_family=AF_INET;//地址族servaddr.sin_port=htons(5188);//端口号（需要两个字节的网络端口号）servaddr.sin_addr.s_addr=htonl(INADDR_ANY);//地址（选用本机任意地址）/*servaddr.sin_addr.s_addr=inet_addr("192.168.241.129");//选用指定地址*//*inet_aton("192.168.241.129",&servaddr.sin_addr);//将本机地址转换为网络地址*///绑定if((bind(listenfd,(struct sockaddr*)&servaddr,sizeof(servaddr)))<0)ERR_EXIT("bind");//绑定失败//监听if((listen(listenfd,SOMAXCONN))<0)ERR_EXIT("listen");//监听失败//监听后变成被动套接字struct sockaddr_in peeraddr;//定义对方地址结构socklen_t peerlen=sizeof(peeraddr);//对方地址长度int conn;//已连接socket获得的数据if((conn=accept(listenfd,(struct sockaddr*)&peeraddr,&peerlen))<0)ERR_EXIT("accept");//接收失败//接收连接成功char recvbuf[1024];while(1){memset(recvbuf,0,sizeof(recvbuf));//接收数据int ret=read(conn,recvbuf,sizeof(recvbuf));//读取数据fputs(recvbuf,stdout);//输出数据(标准输出)write(conn,recvbuf,ret);//回射数据}return 0;close(conn);close(listenfd);}

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