多线程编程示例（基于tcp_socket）

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服务端（server）

/*************************************************************************> File Name: threadserver.c> Author: kid> Mail: 280197326@qq.com > Created Time: 2014年03月01日 星期六 23时20分20秒 ************************************************************************/#include <stdio.h>#include <stdlib.h>#include <errno.h>#include <string.h>#include <sys/types.h>#include <netinet/in.h>#include <sys/socket.h>#include <sys/wait.h>#include <linux/shm.h>#define MYPORT    3490 /* 监听端口 */#define BACKLOG 10 /* listen的请求接收队列长度 */#define LISTLENGTH 32#define MAXDATASIZE 100/*一次可以读的最大字节数 */struct ip_list{int count;int ip_fd[LISTLENGTH];};struct ip_list *viraddr;void * trd(int new_fd){int numbytes,i;char buf[MAXDATASIZE];while(1){numbytes = recv(new_fd,buf,MAXDATASIZE,0);buf[numbytes] = '\0';if(numbytes==0){printf("tid: %d close connect!\n", new_fd);viraddr->ip_fd[new_fd]=0;break;}printf("Received: %s",buf);for(i=0;i<LISTLENGTH;i++){if(viraddr->ip_fd[i]!=0){send(viraddr->ip_fd[i], buf, MAXDATASIZE, 0);printf("ip_fd:%d\n",viraddr->ip_fd[i]);}}}pthread_exit();}void main(){int  sockfd, new_fd, numbytes, i=0; /* 监听端口，数据端口 */char buf[MAXDATASIZE];struct sockaddr_in my_addr; /* 自身的地址信息 */struct sockaddr_in their_addr; /* 连接对方的地址信息 */int sin_size,pid;pthread_t  t1;viraddr = (struct ip_list *)malloc(sizeof(struct ip_list));viraddr->count = 0;for(i=0;i<LISTLENGTH;i++){viraddr->ip_fd[i]=0;}sockfd = socket(AF_INET, SOCK_STREAM, 0);my_addr.sin_family = AF_INET; my_addr.sin_port = htons(MYPORT); /* 网络字节顺序 */my_addr.sin_addr.s_addr = INADDR_ANY; /* 自动填本机IP */bzero(&(my_addr.sin_zero), 8); /* 其余部分置0 */bind(sockfd, (struct sockaddr *)&my_addr,sizeof(struct sockaddr));listen(sockfd, BACKLOG);while(1){ /* 主循环 */sin_size = sizeof(struct sockaddr_in);new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size);//i=viraddr->count;viraddr->ip_fd[new_fd]=new_fd;viraddr->count = viraddr->count +1;printf("Got connection from %s\n", inet_ntoa(their_addr.sin_addr));pthread_create(&t1, NULL, trd, new_fd);}}

客户端（client）

/*************************************************************************> File Name: threadclient.c> Author: kid> Mail: 280197326@qq.com > Created Time: 2014年03月01日 星期六 23时25分41秒 ************************************************************************/#include <stdio.h>#include <stdlib.h>#include <errno.h>#include <string.h>#include <netdb.h>#include <sys/types.h>#include <netinet/in.h>#include <sys/socket.h>#define PORT 3490 /* Server的端口 */#define MAXDATASIZE 100/*一次可以读的最大字节数 */int main(int argc, char *argv[]){int sockfd, numbytes,pid;char buf[MAXDATASIZE];struct hostent *he;/* 主机信息 */struct sockaddr_in their_addr; /* 对方地址信息 */if (argc != 2) {fprintf(stderr,"usage: client hostname\n");exit(1);}he=gethostbyname(argv[1]);sockfd=socket(AF_INET,SOCK_STREAM,0);their_addr.sin_family = AF_INET; their_addr.sin_port = htons(PORT); /* short, NBO */their_addr.sin_addr = *((struct in_addr *)he->h_addr);bzero(&(their_addr.sin_zero), 8); /* 其余部分设成0 */connect(sockfd, (struct sockaddr *)&their_addr, sizeof(struct sockaddr));while((pid=fork())==-1);if(pid==0){while(1){numbytes = recv(sockfd,buf,MAXDATASIZE,0);buf[numbytes] = '\0';if(numbytes==0){printf("connect close:%s\n",inet_ntoa(their_addr.sin_addr));break;}printf("Received: %s\n",buf);}}else{while(1){//printf("your message:");fgets(buf,MAXDATASIZE,stdin);if(strncmp(buf,"#end#",5)==0)break;send(sockfd, buf, MAXDATASIZE, 0);}kill(pid,9);}close(sockfd);return 0;}

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