Linux 网络编程---->简单的UDP实例

liuweinn

2012-03-22

这是一个简单的UDP的实例而已～

//!> server
//!> server.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <netinet/in.h>

#define

  SERV_PORT   6000
#define   MAXLINE       1024

int main( int argc, char ** argv )
{
    char   recv[MAXLINE];
    int       listenfd,connfd;
    int       chilen, len,i;
    int       nread;
    structsockaddr_in servaddr, chiaddr;

   //!> establish the socket
   //!>
    if( (listenfd = socket( AF_INET, SOCK_DGRAM,0 ) ) == -1 )
    {
      printf("Socket error.. %d\n", errno);
       exit(EXIT_FAILURE );
    }

   //!>
   //!> write info
    bzero(&servaddr, sizeof( servaddr ) );
   servaddr.sin_family = AF_INET;
   servaddr.sin_addr.s_addr =htonl( INADDR_ANY);
   servaddr.sin_port = htons( SERV_PORT );

   //!>
   //!> bind
    if( bind(listenfd, ( struct sockaddr * )&servaddr, sizeof(servaddr ) ) == -1 )
    {
       printf("Binderror... %d\n", errno);
       exit(EXIT_FAILURE );
    }

    while( 1)
   {
       chilen =sizeof( chiaddr );

       memset( recv, 0, sizeof( recv ) );
        nread =recvfrom(connfd,recv, MAXLINE, 0, (struct sockaddr*)&chiaddr, &chilen);//read(connfd, recv, MAXLINE );
                                                               //!> 记住：一般都用它
       if( nread ==-1 )

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Linux 网络编程----&gt;简单的UDP实例

liuweinn

liuweinn

liuweinn

Linux 网络编程---->简单的UDP实例