send.c~

Linux下简单的网络通讯：发出接受数据（Socket）编程

#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <linux/in.h>
//#define DEST_IP "192.168.0.83"
#define DEST_IP "127.0.0.1"
#define DEST_PORT 4000

main()
{
  int sockfd;
  struct sockaddr_in dest_addr;
  char *msg="hello!world!";
  int len,bytes_sent;
  int count=0;
  int result=0;

  sockfd=socket(AF_INET,SOCK_STREAM,0);
  dest_addr.sin_family=AF_INET;
  dest_addr.sin_port=htons(DEST_PORT);
  dest_addr.sin_addr.s_addr=inet_addr(DEST_IP);
  bzero(&(dest_addr.sin_zero),8);

  result=connect(sockfd,(struct sockaddr *)&dest_addr,sizeof(struct sockaddr));
  while ((count<5)&&(result==-1))
    {
      printf(" can not connect\n");
      count++;
      result=connect(sockfd,(struct sockaddr *)&dest_addr,sizeof(struct sockaddr));
    
    }
  if (count==5) 
  {
    printf(" connect failed\n"); 
    exit(-1);
  }
  len=strlen(msg);
  bytes_sent=send(sockfd,msg,len,0);
  printf(" send success,length=%d\n",bytes_sent);
  close(sockfd);
}