udp_recv.c

来自「ARM9200+嵌入式linux下的网络驱动」· C语言 代码 · 共 34 行

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>

int port = 6789;

int main()
{
  int sin_len;
  char message[256];
  int socket_descriptor;
  struct sockaddr_in sin;
  bzero(&sin,sizeof(sin));
  sin.sin_family = AF_INET;
  sin.sin_addr.s_addr = htonl(INADDR_ANY);
  sin.sin_port=htons(port);
  sin_len = sizeof(sin);

  socket_descriptor = socket(AF_INET,SOCK_DGRAM,0);
  bind(socket_descriptor, (struct sockaddr *)&sin,sizeof(sin));
  while(1)
    {
      recvfrom(socket_descriptor,message,sizeof(message),0,\
	       (struct sockaddr *)&sin, &sin_len);
      printf(message);
    }
  close(socket_descriptor);
  exit(0);
}