Linux下基于socket多线程并发通信的实现 阻塞

/*************************************************** 
* 文件名：pthread_server.c 
* 文件描述：创建子线程来接收客户端的数据 
***************************************************/
#include <sys/types.h>   
#include <sys/socket.h>   
#include <stdio.h>   
#include <netinet/in.h>   
#include <arpa/inet.h>   
#include <unistd.h>   
#include <stdlib.h>   
#include <pthread.h>   
void *rec_data(void *fd);   
int main(int argc,char *argv[])   
{   
       int server_sockfd;   
    int *client_sockfd;   
       int server_len, client_len;   
       struct sockaddr_in server_address;   
       struct sockaddr_in client_address;   
       struct sockaddr_in tempaddr;   
       int i,byte;   
       char char_recv,char_send;   
       socklen_t templen;   
       server_sockfd = socket(AF_INET, SOCK_STREAM, 0);//创建套接字   
            
       server_address.sin_family = AF_INET;   
       server_address.sin_addr.s_addr =  htonl(INADDR_ANY);   
       server_address.sin_port = htons(9734);   
       server_len = sizeof(server_address);   
                 
       bind(server_sockfd, (struct sockaddr *)&server_address, server_len);//绑定套接字   
       templen = sizeof(struct sockaddr);   
            
       printf("server waiting for connect/n");   
       while(1){   
              pthread_t thread;//创建不同的子线程以区别不同的客户端   
              client_sockfd = (int *)malloc(sizeof(int));   
              client_len = sizeof(client_address);   
              *client_sockfd = accept(server_sockfd,(struct sockaddr *)&client_address, (socklen_t *)&client_len);   
              if(-1==*client_sockfd){   
                     perror("accept");   
                     continue;   
              }   
              if(pthread_create(&thread, NULL, rec_data, client_sockfd)!=0)//创建子线程   
              {   
                     perror("pthread_create");   
                     break;   
              }   
       }   
       shutdown(*client_sockfd,2);   
       shutdown(server_sockfd,2);   
}   
/***************************************** 
* 函数名称：rec_data 
* 功能描述：接受客户端的数据 
* 参数列表：fd——连接套接字 
* 返回结果：void 
*****************************************/
void *rec_data(void *fd)   
{   
       int client_sockfd;   
       int i,byte;   
       char char_recv[100];//存放数据   
       client_sockfd=*((int*)fd);   
       for(;;)   
       {   
              if((byte=recv(client_sockfd,char_recv,100,0))==-1)   
              {   
                     perror("recv");   
                     exit(EXIT_FAILURE);    
              }   
              if(strcmp(char_recv, "exit")==0)//接受到exit时，跳出循环   
                     break;   
              printf("receive from client is %s/n",char_recv);//打印收到的数据   
       }   
       free(fd);   
       close(client_sockfd);   
       pthread_exit(NULL);   
}

 

 

/*************************************************** 
* 文件名：pthread_client.c 
* 文件描述：创建子线程来接收客户端的数据 
***************************************************/
#include <sys/types.h>   
#include <sys/socket.h>   
#include <stdio.h>   
#include <netinet/in.h>   
#include <arpa/inet.h>   
#include <unistd.h>   
#include <stdlib.h>   
int main(int argc,char *argv[])   
{   
       int sockfd;   
       int len;   
       struct sockaddr_in address;      
       int result;   
       int i,byte;   
       char char_send[100] = { 0 };   
    if((sockfd = socket(AF_INET, SOCK_STREAM, 0))==-1)   
       {   
              perror("socket");   
              exit(EXIT_FAILURE);   
       }   
    if(argc != 3){   
      printf("Usage: fileclient <address> <port>/n");//用法：文件名 服务器IP地址 服务器端口地址   
      return 0;   
   }   
   if((sockfd = socket(AF_INET,SOCK_STREAM,0)) == -1){   
       perror("sock");   
       exit(1);   
   }   
   bzero(&address,sizeof(address));   
   address.sin_family = AF_INET;   
   address.sin_port = htons(atoi(argv[2]));   
   inet_pton(AF_INET,argv[1],&address.sin_addr);   
len = sizeof(address);   
            
    if((result = connect(sockfd, (struct sockaddr *)&address, len))==-1)   
       {   
              perror("connect");   
              exit(EXIT_FAILURE);   
       }   
            
       for(;;)   
       {   
             scanf("%s", char_send);//输入发送数据   
              fflush(stdin);//清除输入缓存   
              if(strcmp(char_send, "exit")==0){//如果输入exit，跳出循环   
                     if((byte=send(sockfd,char_send,100,0))==-1)   
                     {   
                            perror("send");   
                            exit(EXIT_FAILURE);   
                     }              
                     break;   
              }                     
              if((byte=send(sockfd,char_send,100,0))==-1)   
              {   
                     perror("send");   
                     exit(EXIT_FAILURE);   
              }   
       }   
    close(sockfd);   
    exit(0);   
}

编译服务器端程序 pthread_server.c ：

$gcc pthread_server.c –o server –lpthread

编译客户端程序 pthread_client.c:

$gcc pthread_client.c –o client

编译在开发板上跑的客户端程序：

$arm-linux-gcc client.c –o arm_client

先启动服务器端的程序 server:

$./server

打开另一个终端，启动客户端的程序 client:

$./client 127.0.0.1 9734

把 arm_client 放到开发板上，启动 arm_client:

$./arm_client 219.222.170.9 9734

结果 :

服务器端：

tongs@tong's-desktop:~/c_c++_program/sock_inet_comm2$ ./server

server waiting for connect

receive from client is client

receive from client is client

receive from client is arm_client

receive from client is arm_client

客户端：

tongs@tong's-desktop:~/c_c++_program/sock_inet_comm2$ ./client 127.0.0.1 9734

client

client

exit