线程实现tcp服务器

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线程实现tcp服务器
#include <stdlib.h>#include <stdio.h>#include <errno.h>#include <string.h>#include <netdb.h>#include <sys/types.h>#include <netinet/in.h>#include <sys/socket.h>#define portnumber 3333void * read_msg(void *arg){    int fd = *((int *)arg);int nread = 0;char buffer[1024];while((nread = read(fd,buffer,sizeof(buffer))) > 0){    buffer[nread] = '\0';printf("get client message: %s\n",buffer);memset(buffer,0,sizeof(buffer));}}void * write_msg(void * arg){       int fd = *((int *)arg);    while(1){    write(fd,"hello",5);    sleep(2);}}int main(int argc, char *argv[]){int sockfd,new_fd;struct sockaddr_in server_addr;struct sockaddr_in client_addr;int sin_size;int nbytes;char buffer[1024];pthread_t id;/* 服务器端开始建立sockfd描述符 */if((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1) // AF_INET:IPV4;SOCK_STREAM:TCP{fprintf(stderr,"Socket error:%s\n\a",strerror(errno));exit(1);}/* 服务器端填充 sockaddr结构 */bzero(&server_addr,sizeof(struct sockaddr_in)); // 初始化,置0server_addr.sin_family=AF_INET;                 // Internetserver_addr.sin_addr.s_addr=htonl(INADDR_ANY);  // (将本机器上的long数据转化为网络上的long数据)和任何主机通信  //INADDR_ANY 表示可以接收任意IP地址的数据，即绑定到所有的IP//server_addr.sin_addr.s_addr=inet_addr("192.168.1.1");  //用于绑定到一个固定IP,inet_addr用于把数字加格式的ip转化为整形ipserver_addr.sin_port=htons(portnumber);         // (将本机器上的short数据转化为网络上的short数据)端口号/* 捆绑sockfd描述符到IP地址 */if(bind(sockfd,(struct sockaddr *)(&server_addr),sizeof(struct sockaddr))==-1){fprintf(stderr,"Bind error:%s\n\a",strerror(errno));exit(1);}/* 设置允许连接的最大客户端数 */if(listen(sockfd,5)==-1){fprintf(stderr,"Listen error:%s\n\a",strerror(errno));exit(1);}while(1){/* 服务器阻塞,直到客户程序建立连接 */sin_size=sizeof(struct sockaddr_in);printf("accepting!\n");if((new_fd=accept(sockfd,(struct sockaddr *)(&client_addr),&sin_size))==-1){fprintf(stderr,"Accept error:%s\n\a",strerror(errno));exit(1);}fprintf(stderr,"Server get connection from %s\n",inet_ntoa(client_addr.sin_addr)); // 将网络地址转换成.字符串                pthread_create(&id,NULL,(void *)read_msg,(void *)&new_fd);        pthread_create(&id,NULL,(void *)write_msg,(void *)&new_fd);}/* 结束通讯 */close(sockfd);exit(0);}
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