多进程服务器
#include<myhead.h>
#define PORT 8888 //端口号
#define IP "192.168.10.10" //IP地址//定义信号处理函数，用于回收僵尸进程
void handler(int signo)
{if(signo == SIGCHLD){while(waitpid(-1, NULL, WNOHANG) > 0 );}
}//定义处理客户端操作的函数
int deal_cli_msg(int newfd, struct sockaddr_in cin)
{//5、收发数据char rbuf[128] = ""; //读取消息的容器while(1){//清空内容bzero(rbuf, sizeof(rbuf));int res = recv(newfd, rbuf, sizeof(rbuf), 0);if(res == 0){printf("客户端下线\n");break;}printf("[%s:%d] : %s\n", inet_ntoa(cin.sin_addr), ntohs(cin.sin_port), rbuf);}close(newfd);return 0;
}int main(int argc, const char *argv[])
{//将SIGCHLD信号与信号处理函数进行绑定if(signal(SIGCHLD, handler) == SIG_ERR){perror("signal error");return -1;}int sfd = -1;if((sfd = socket(AF_INET, SOCK_STREAM, 0)) == -1){perror("socket error");return -1;}printf("sfd = %d\n", sfd); //设置端口号快速重用int reuse = 1;if(setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse))==-1){perror("setsockopt error");return -1;}struct sockaddr_in sin;sin.sin_family = AF_INET; //地址族为IPv4sin.sin_port = htons(PORT); //端口号，需要转换网络字节序sin.sin_addr.s_addr = inet_addr(IP); //IP地址if(bind(sfd, (struct sockaddr*)&sin, sizeof(sin)) == -1){perror("bind error");return -1;}if(listen(sfd, 128) == -1){perror("listen error");return -1;}struct sockaddr_in cin;socklen_t socklen = sizeof(cin); //接收长度int newfd = -1; //用于跟客户端通信的套接字文件描述符pid_t pid = -1; //接收子进程pid号while(1){if( (newfd=accept(sfd, (struct sockaddr*)&cin, &socklen)) == -1){perror("accept error");return -1;}printf("[%s:%d] 连接成功, newfd = %d\n", inet_ntoa(cin.sin_addr),\ntohs(cin.sin_port), newfd); //创建子进程用于跟新的客户端进行通信工作pid = fork();if(pid > 0){//父进程用于接收客户端连接请求//父进程中关闭newfdclose(newfd);}else if(pid == 0){//关闭sfdclose(sfd);//调用处理客户端信息的函数deal_cli_msg(newfd, cin);//退出子进程exit(EXIT_SUCCESS);}else {perror("fork error");return -1;}}//关闭套接字close(sfd);return 0;
}多线程服务器
#include<myhead.h>
#define PORT 8888 //端口号
#define IP "192.168.10.10" //IP地址//定义向线程体中传递参数的结构体类型
struct pthread_ds
{int newfd; //处理客户端的套接字文件描述符struct sockaddr_in cin; //客户端套接字地址信息结构体变量
};//定义线程处理函数
void *deal_cli_msg(void *arg)
{//分解传过来的参数int newfd = ((struct pthread_ds*)arg)->newfd; struct sockaddr_in cin = ((struct pthread_ds*)arg)->cin;//5、收发数据char rbuf[128] = ""; //读取消息的容器while(1){//清空内容bzero(rbuf, sizeof(rbuf));int res = recv(newfd, rbuf, sizeof(rbuf), 0);if(res == 0){printf("客户端下线\n");break;}}close(newfd);//退出线程pthread_exit(NULL);}int main(int argc, const char *argv[])
{//1、创建套接字int sfd = -1;if((sfd = socket(AF_INET, SOCK_STREAM, 0)) == -1){perror("socket error");return -1;}printf("sfd = %d\n", sfd); //设置端口号快速重用int reuse = 1;if(setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse))==-1){perror("setsockopt error");return -1;}//2、绑定地址信息结构体（必须）//2.1 填充地址信息结构体struct sockaddr_in sin;sin.sin_family = AF_INET; //地址族为IPv4sin.sin_port = htons(PORT); //端口号，需要转换网络字节序sin.sin_addr.s_addr = inet_addr(IP); //IP地址//2.2绑定工作if(bind(sfd, (struct sockaddr*)&sin, sizeof(sin)) == -1){perror("bind error");return -1;}//3、将套接字设置成被动监听状态if(listen(sfd, 128) == -1){perror("listen error");return -1;}//4、接收链接请求//4.1 定义用于接收客户端地址信息的结构体变量struct sockaddr_in cin;socklen_t socklen = sizeof(cin); //接收长度//4.2 接收客户端链接请求int newfd = -1; //用于跟客户端通信的套接字文件描述符pthread_t tid = -1; //接收线程号while(1){//接收客户端链接请求if( (newfd=accept(sfd, (struct sockaddr*)&cin, &socklen)) == -1){perror("accept error");return -1;}printf("[%s:%d] 连接成功, newfd = %d\n", inet_ntoa(cin.sin_addr),\ntohs(cin.sin_port), newfd); //?//定义一个向线程体传递的结构体变量struct pthread_ds info = {newfd, cin};//创建一个分支线程，用于跟客户端进行通信if(pthread_create(&tid, NULL, deal_cli_msg, &info) != 0){printf("tid create error\n");return -1;}//回收线程资源//pthread_join(tid); //不能使用阻塞形式回收线程资源pthread_detach(tid); //将线程设置成分离态}//关闭套接字close(sfd);return 0;
}
)
