并发概念:并发是指两个或多个事件在同一时间间隔发生;多线程实现TCP并发服务器的实现流程:一、创建套接字(socket函数):通信域选择IPV4网络协议、套接字类型选择流式; int sockfd =
int sockfd = Socket(AF_INET,SOCK_STREAM,0); //通信域选择IPV4、套接字类型选择流式
struct sockaddr_in serveraddr; //定义网络信息结构体变量 socklen_t serveraddrlen = sizeof(serveraddr);//求出结构体变量的内存空间大小 memset(&serveraddr,0,serveraddrlen); //结构体清零 serveraddr.sin_family = AF_INET; //使用IPV4网络协议 serveraddr.sin_addr.s_addr = inet_addr(argv[1]); //IP地址 serveraddr.sin_port = htons(atoi(argv[2]));//网络字节序的端口号
int ret = bind(sockfd,(struct sockaddr *)&serveraddr,serveraddrlen);
int ret1 = listen(sockfd, 5);
if(-1 == (info.accept_fd = accept(sockfd,(struct sockaddr *)&(info.clientaddr),&clientaddr_len))) { perror("accept error"); exit(-1); }
if(0 != (ret1 = pthread_create(&thread_id,NULL,message_handling,&info))) { printf("pthread_create error : errno = [%d] errstr = [%s]\n",ret1,strerror(ret1)); exit(EXIT_FaiLURE); }
if(0 != (ret2 = pthread_detach(thread_id))) { printf("pthread_create error : errno = [%d] errstr = [%s]\n",ret2,strerror(ret2)); exit(EXIT_FAILURE); }
//线程处理函数void *message_handling(void *arg);int nbytes = recv(acceptfd,buf,sizeof(buf),0);printf("客户端发来数据[%s]\n",buf);strcat(buf,"----k"); //组装应答消息int ret2 = send(acceptfd,buf,sizeof(buf),0);
close(info.accept_fd); pthread_exit(NULL);
//多线程实现tcp并发服务器#include #include #include #include #include #include #include #include #include #include #include typedef struct INFO{ int accept_fd; struct sockaddr_in clientaddr;}info_t;//线程处理函数void *message_handling(void *arg);int main(int arGC, char const *argv[]){ //入参合理性检查 if(3 != argc) { printf("Usage : %s \n" ,argv[0]); exit(-1); } //创建套接字 int sockfd = socket(AF_INET,SOCK_STREAM,0); if(-1 == sockfd) { perror("socket error"); exit(-1); } //填充服务器网络信息结构体 struct sockaddr_in serveraddr; socklen_t serveraddr_len = sizeof(serveraddr); memset(&serveraddr,0,serveraddr_len); serveraddr.sin_family = AF_INET; serveraddr.sin_addr.s_addr = inet_addr(argv[1]); serveraddr.sin_port = htons(atoi(argv[2])); //将套接字与服务器网络信息结构体绑定 if(-1 == bind(sockfd,(struct sockaddr *)&serveraddr,serveraddr_len)) { perror("bind error"); exit(-1); } //将套接字设置成被监听状态 if(-1 == listen(sockfd,5)) { perror("listen error"); exit(-1); } info_t info; pthread_t thread_id; int ret1 = 0; int ret2 = 0; socklen_t clientaddr_len = sizeof(info.clientaddr); while(true) { //等待客户端连接 if(-1 == (info.accept_fd = accept(sockfd,(struct sockaddr *)&(info.clientaddr),&clientaddr_len))) { perror("accept error"); exit(-1); } //若有客户端连接成功,就创建线程,专门用来和该客户端通信 if(0 != (ret1 = pthread_create(&thread_id,NULL,message_handling,&info))) { printf("pthread_create error : errno = [%d] errstr = [%s]\n",ret1,strerror(ret1)); exit(EXIT_FAILURE); } //将线程设置成分离属性,线程结束后由操作系统回收资源 if(0 != (ret2 = pthread_detach(thread_id))) { printf("pthread_create error : errno = [%d] errstr = [%s]\n",ret2,strerror(ret2)); exit(EXIT_FAILURE); } } close(sockfd); return 0;}void *message_handling(void *arg){ info_t info = *(info_t *)arg; printf("客户端[%s : %d]连接到服务器\n",inet_ntoa(info.clientaddr.sin_addr),ntohs(info.clientaddr.sin_port)); //接收客户端数据,并作出应答 int nbytes = 0; char buf[128] = {0}; while(true) { memset(buf,0,sizeof(buf)); //接收消息 if(-1 == (nbytes = recv(info.accept_fd,buf,sizeof(buf),0))) { perror("recv error"); break; }else if(0 == nbytes){ printf("客户端[%s : %d]断开了连接\n",inet_ntoa(info.clientaddr.sin_addr),ntohs(info.clientaddr.sin_port)); break; } if(!strcmp(buf,"quit")) { printf("客户端[%s : %d]退出了\n",inet_ntoa(info.clientaddr.sin_addr),ntohs(info.clientaddr.sin_port)); break; } printf("客户端[%s : %d]发来消息[%s]\n",inet_ntoa(info.clientaddr.sin_addr),ntohs(info.clientaddr.sin_port),buf); //组装应答 strcat(buf,"------k"); //发送应答 if(-1 == send(info.accept_fd,buf,sizeof(buf),0)) { perror("send error"); break; } } close(info.accept_fd); pthread_exit(NULL); }
来源地址:https://blog.csdn.net/qq_41878292/article/details/133689780
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本文标题: C/S架构学习之多线程实现TCP并发服务器
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