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作业：

多进程多线程并发服务器实现一遍提交。

多进程：

/*******************************************************/
//=> File Name: bingfaser.c
//=> Author: Water
//=> Mail: 1249496568@qq.com 
//=> Created Time: 2024年12月29日 星期日 14时08分42秒
/*******************************************************/#include<myhead.h>
#define IP "192.168.124.71"
#define PORT 9999
void handle(int sss)
{if(sss == SIGCHLD){while(waitpid(-1,NULL,WNOHANG) > 0);}printf("子进程回收成功\n");
}
int main(int argc, const char *argv[])
{//1、创建套接字int oldfd = socket(AF_INET,SOCK_STREAM,0);if(oldfd == -1){perror("socket");return -1;}//快速复用int k = 1;if(setsockopt(oldfd,SOL_SOCKET,SO_REUSEADDR,&k,sizeof(k)) == -1){perror("setsockopt");return -1;}printf("端口号快速复用成功\n");//2、绑定struct sockaddr_in server = {.sin_family = AF_INET,.sin_port = htons(PORT),.sin_addr.s_addr = inet_addr(IP)};if(bind(oldfd,(struct sockaddr *)&server,sizeof(server)) == -1){perror("bind");return -1;}//3、监听if(listen(oldfd,88) == -1){perror("listen");return -1;}//4、父进程连接新的客户端struct sockaddr_in client;int client_len = sizeof(client);while(1){int newfd = accept(oldfd,(struct sockaddr *)&client,&client_len);if(newfd == -1){perror("accept");return -1;}printf("客户端%s:%d已连接\n",inet_ntoa(client.sin_addr),ntohs(client.sin_port));//5、创建子进程,父进程关闭新的描述符pid_t pid = fork();char buff[1024] = "";if(pid > 0){if(signal(SIGCHLD,handle) == SIG_ERR) //绑定子进程退出时的信号{perror("signal");return -1;}close(newfd);}//6、子进程负责数据收发，关闭旧的描述符else if(pid == 0){close(oldfd);while(1){int res = recv(newfd,buff,sizeof(buff),0);if(res == 0){printf("\n客户端%s:%d已退出\n",\inet_ntoa(client.sin_addr),ntohs(client.sin_port));break;}printf("\n客户端%s:%d发来信息:%s\n",\inet_ntoa(client.sin_addr),ntohs(client.sin_port),buff);strcat(buff,"\n服务器已接收\n");send(newfd,buff,sizeof(buff),0);bzero(buff,sizeof(buff));}exit(0);}else{perror("fork");return -1;}}close(oldfd);return 0;
}

 多线程：

/*******************************************************/
//=> File Name: bingfaser.c
//=> Author: Water
//=> Mail: 1249496568@qq.com 
//=> Created Time: 2024年12月29日 星期日 14时08分42秒
/*******************************************************/#include<myhead.h>
#define IP "192.168.124.71"
#define PORT 9999
void * fun(void * fd)
{int newfd = *(int *)fd;char buff[1024];while(1){int res = recv(newfd,buff,sizeof(buff),0);if(res == 0){printf("\n客户端已退出\n");break;}printf("\n客户端发来信息:%s\n",buff);strcat(buff,"\n服务器已接收\n");send(newfd,buff,sizeof(buff),0);bzero(buff,sizeof(buff));}pthread_exit(NULL);
}
int main(int argc, const char *argv[])
{//1、创建套接字int oldfd = socket(AF_INET,SOCK_STREAM,0);if(oldfd == -1){perror("socket");return -1;}//快速复用int k = 1;if(setsockopt(oldfd,SOL_SOCKET,SO_REUSEADDR,&k,sizeof(k)) == -1){perror("setsockopt");return -1;}printf("端口号快速复用成功\n");//2、绑定struct sockaddr_in server = {.sin_family = AF_INET,.sin_port = htons(PORT),.sin_addr.s_addr = inet_addr(IP)};if(bind(oldfd,(struct sockaddr *)&server,sizeof(server)) == -1){perror("bind");return -1;}//3、监听if(listen(oldfd,88) == -1){perror("listen");return -1;}//4、主线程连接新的客户端struct sockaddr_in client;int client_len = sizeof(client);int newfd;pthread_t tid;while(1){newfd = accept(oldfd,(struct sockaddr *)&client,&client_len);if(newfd == -1){perror("accept");return -1;}printf("客户端%s:%d已连接\n",inet_ntoa(client.sin_addr),ntohs(client.sin_port));//5、创建子线程,主线程关闭新的描述符if(pthread_create(&tid,NULL,fun,&newfd) == -1){perror("pthread_create");return -1;}}pthread_join(tid,NULL); //回收子线程资源close(newfd);close(oldfd);return 0;
}