server.c

linux下采用UDP协议的套接字的收发报文例子,套接口编程练习。

#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <stdlib.h>


int port = 5678;
int count = 10;

int main(void)
{
  int sd;
  int i;
  struct sockaddr_in s_addr;
  sd=socket(AF_INET,SOCK_DGRAM,0);
  printf("sd==%d\n",sd);
 if(sd==-1)
  {
       printf("socket created error!\n");
      exit(0);
  }
 else
  printf("socket created success\n");

       memset(&s_addr,0,sizeof(s_addr));
       s_addr.sin_family=AF_INET;
       s_addr.sin_addr.s_addr=inet_addr("10.0.0.18");
       s_addr.sin_port=htons(port);
 
  for(i=0;i<count;i++)
  {
  if(sendto(sd,"test from server",sizeof("test from server"),0,(struct sockaddr *) &s_addr,sizeof(s_addr))<0)
   {
   printf("send error!\n");
   exit(0);
   }
   printf("send success!\n");
   sleep(3);
  } 
 
}