一个简单的可以接收TCP客户端数据的TCP服务器

来源：互联网发布：mac是什么意思啊编辑：程序博客网时间：2024/05/30 05:05
#include <stdio.h>#include <stdlib.h>#include <string.h>#include <unistd.h>#include <sys/socket.h>#include <netinet/in.h>#include <arpa/inet.h>int main(int argc, char * argv [ ]){unsigned short port = 8000;if (argc > 1){port = atoi(argv[1]);}//创建TCP套接字int sockfd = socket(AF_INET, SOCK_STREAM,0);if (sockfd < 0){perror("socket");exit(-1);}//组织本地信息struct sockaddr_in my_addr;bzero(&my_addr,sizeof my_addr);my_addr.sin_family = AF_INET;my_addr.sin_port = htons(port);my_addr.sin_addr.s_addr = htonl(INADDR_ANY);//绑定信息int err_log = bind(sockfd, (struct sockaddr *)&my_addr, sizeof my_addr);if (err_log != 0){perror("binding");close(sockfd);exit(-1);}//主动变被动err_log = listen(sockfd,10);if (err_log != 0){perror("listen");close(sockfd);exit(-1);}printf("listen client @port=%d...\n",port);while (1){struct sockaddr_in client_addr;char cli_ip[INET_ADDRSTRLEN] = "";socklen_t cliaddr_len = sizeof client_addr;int connfd;//等待消息的到来connfd = accept(sockfd, (struct sockaddr *)&client_addr,&cliaddr_len);if (connfd < 0){perror("accept");continue;}//转换并打印inet_ntop(AF_INET,&client_addr.sin_addr,cli_ip,INET_ADDRSTRLEN);printf("------------------------------------------\n");printf("client ip=%s,port=%d\n",cli_ip,ntohs(client_addr.sin_port));//接收信息char recv_buf[2048] = "";while (recv(connfd,recv_buf,sizeof recv_buf,0) > 0){printf("\nrecv data:\n");printf("%s\n",recv_buf);}close(connfd);//关闭已连接套接字printf("client closed!\n");}close(sockfd);//关闭监听套接字return 0;}
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