【0814作业】多线程并发服务器

1) 代码

#include <stdio.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <string.h>
#include <stdlib.h>
#include <signal.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <head.h>
#include <pthread.h>#define PORT 6666               //1024-49151
#define IP "192.168.1.102"    //ifconfig查看本机ip//需要传入到分支线程的数据类型
struct CliMsg
{int newfd;struct sockaddr_in cin;
};void *deal_cli_msg(void *arg);
void handlr(int sig)
{while(waitpid(-1,NULL,WNOHANG) > 0);
}int main(int argc, const char *argv[])
{if(signal(17,handlr) == SIG_ERR){ERR_MSG("signal");return -1;}//创建流式套接字int sfd = socket(AF_INET,SOCK_STREAM,0);if(sfd < 0){ERR_MSG("socket");return -1;}printf("sfd= %d\n",sfd);                                                                                                    //设置端口允许端口被快速复用int reuse = 1;if(setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) < 0){ERR_MSG("setsockopt");return -1;}printf("允许端口快速重用成功\n");//填充地址信息结构体，真实的地址信息结构体根据地址族制定//AF_INET: man 7 ipstruct sockaddr_in sin;sin.sin_family         = AF_INET;       //必须填AF_INETsin.sin_port           = htons(PORT);   //端口号：1024~49151(网络端口号的字节序)(端口号存储在2个字节的无符号整数中)sin.sin_addr.s_addr    = inet_addr(IP); //本机IP inconfig查看(本机IP地址的字节序)//绑定服务器的IP和端口号--->必须绑定( bind )if(bind(sfd , (struct sockaddr*)&sin, sizeof(sin)) < 0){ERR_MSG("bind");return -1;}printf("bind success\n");//将套接字设置为被动监听状态( listen)if(listen(sfd,128) < 0){ERR_MSG("listen");return -1;}printf("listen success\n");struct sockaddr_in cin;   //存储客户端的地址信息socklen_t addrlen = sizeof(cin);int newfd = -1;pthread_t tid;struct CliMsg info;while(1){newfd = accept(sfd, (struct sockaddr*)&cin, &addrlen);if(newfd < 0){ERR_MSG("accept");return -1;}printf("[%s : %d]newfd=%d 客户端连接成功\n",\inet_ntoa(cin.sin_addr),ntohs(cin.sin_port),newfd);info.newfd = newfd;info.cin=cin;if(pthread_create(&tid,NULL,deal_cli_msg,&info) != 0){ERR_MSG("pthread_create");return -1;}pthread_detach(tid);}//关闭所有文件描述符close(sfd);return 0;
}
//线程执行体
void* deal_cli_msg(void *arg)
{int newfd = ((struct CliMsg *)arg)->newfd;struct sockaddr_in cin = ((struct CliMsg *)arg)->cin;char buf[128]="";ssize_t res = 0;while(1){//接收数据bzero(buf,sizeof(buf));res=recv(newfd,buf,sizeof(buf),0);if(res < 0){ERR_MSG("recv");break;}else if(0 == res){printf("[%s : %d]newfd=%d 客户端已下线\n",\inet_ntoa(cin.sin_addr),ntohs(cin.sin_port),newfd);break;}printf("[%s : %d]newfd=%d : %s\n",\inet_ntoa(cin.sin_addr),ntohs(cin.sin_port),newfd, buf);//发送数据strcat(buf,"*_*");if(send(newfd,buf,sizeof(buf),0) < 0){ERR_MSG("send");return NULL;}printf("send succuss\n");}close(newfd);pthread_exit(NULL);
}