LINUX C 的TCP发送接收测试

最新推荐文章于 2025-01-07 12:54:45 发布

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#tcp #线程

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本文详细介绍了TCP协议下使用C语言进行套接字编程，包括客户端和服务器端的代码实现，涉及socket、read、write、pthread等函数的应用。

今天学习了TCP协议的知识，写了一个本机测试套接字收发的例子，用到了TCP编程和线程的一些函数，在vim下运行无误，代码如下：

客户端：

<p>#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<unistd.h>
#include<pthread.h>
#include<errno.h>
void *cil_recv(void *arg)</p>{
   int fd = (int)arg;
   char buff[100];
   int ret;
   while(1)
   {
   ret = read(fd,buff,100);
   write(1,buff,ret);
   }
}

int main()
{
   draw();
   int fd = socket(AF_INET,SOCK_STREAM,0);
   
   struct sockaddr_in servaddr;
   servaddr.sin_family = AF_INET;
   servaddr.sin_port = htons(7770);
   servaddr.sin_addr.s_addr = inet_addr("127.0.0.1");

   connect(fd,(struct sockaddr *)&servaddr,sizeof(servaddr));
   
   pthread_t tid;
   pthread_create(&tid,NULL,cil_recv,(void *)fd);
   char buff[100];
   int ret;
   while(1)
   {
      fgets(buff,100,stdin);
      write(fd,buff,strlen(buff));
      if(strncmp(buff,"quit",4)==0)
      {
         pthread_cancel(tid);
         break;
      }
   }
   close(fd);
   return 0;
}

服务端：

#include<stdio.h>
#include<stdlib.h>
#include<string.h>

#include<sys/types.h>
#include<sys/socket.h>  //socket()
#include<netinet/in.h>  //inet_addr()
#include<arpa/inet.h>
#include<unistd.h>   //read() /write()
#include<pthread.h>
#include<errno.h>


void *ser_send(void *arg)
{
   char buff[100];
   int newfd = (int)arg;
   while(1)
   {
      fgets(buff,100,stdin);
      write(newfd,buff,strlen(buff));
   }
}

int main()
{
   draw();
   int fd = socket(AF_INET,SOCK_STREAM,0);
   printf("socket id = %d\n",fd);
   
   struct sockaddr_in servaddr;
   servaddr.sin_family = AF_INET;
   servaddr.sin_port = htons(7770);
   servaddr.sin_addr.s_addr = htonl(INADDR_ANY);


   int err = bind(fd,(struct sockaddr *)&servaddr,sizeof(servaddr));
   if(err < 0)
   {
      fprintf(stderr,"%s\n",strerror(err));
      return -1;
   }
   listen(fd,5);
  
   int newfd;
   struct sockaddr_in peer; 
   socklen_t size;
   size = sizeof(peer);
   while(1)
   {
   printf("waiting for client connectting...\n");
   newfd = accept(fd,(struct sockaddr *)&peer,&size);
   printf("ip:%s,port:%d\n",inet_ntoa(peer.sin_addr),ntohs(peer.sin_port));
   pthread_t tid;
   pthread_create(&tid,NULL,ser_send,(void *)newfd);

   char buff[100];
   int cnt;
   while(1)
   {
      cnt = read(newfd,buff,100);
      write(1,buff,cnt);
     
      buff[cnt] = '\0';
      if(strncmp(buff,"quit",4)==0)
      {
         pthread_cancel(tid);
         break;
      }
   }
   close(newfd);
   }
   close(fd);

   return 0;
}