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>
#define DEST_IP "192.168.0.91"
#define DEST_PORT 23

main()
{
  int sockfd;
  struct sockaddr_in dest_addr;
  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);
  
  if (connect(sockfd,(struct sockaddr *)&dest_addr,sizeof(struct sockaddr))==-1)
    { printf(" can not connect\n");
      exit(-1);
    }
 
  len=strlen(msg);
  bytes_sent=send(sockfd,msg,len,0);
  printf(" send success,length=%d\n",bytes_sent);
  close(sockfd);
}