互联网套接字在同一主机上

Question

我试图让互联网套接字客户端和服务器在同一主机上运行，​​但我只是从客户端获得连接错误超时连接，我就是这样做的这里的Ubuntu虚拟机是我的代码：

服务器

#include <stdlib.h>        /* for getenv */
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>    /* Internet domain header */
#include <strings.h>
#define SERVER_PORT  59154
struct sockaddr_in self = {AF_INET};
int main()
{ int soc, ns, k;
  char buf[256];
  struct sockaddr_in peer = {AF_INET}; 
  int peer_len = sizeof(peer);
  char *host;
  /* set up listening socket soc */

      soc = socket(AF_INET, SOCK_STREAM, 0);
     if (soc < 0)
     {  perror("server:socket"); exit(1);
     }
     bzero(&self, sizeof(self));
     self.sin_family = AF_INET;
     self.sin_addr.s_addr = htonl(INADDR_ANY);
     self.sin_port = htons(SERVER_PORT);
     if (bind(soc, (struct sockaddr *)&self, 
            sizeof(self)) == -1)
     {  perror("server:bind"); close(soc); exit(1); }
     listen(soc, 1);
  /* accept connection request */
     ns = accept(soc, (struct sockaddr *)&peer, &peer_len);
     if (ns < 0)
     {  perror("server:accept"); close(soc); exit(1); }
  /* data transfer on connected socket ns */

      k = read(ns, buf, sizeof(buf));
     host = getenv("HOST");
     printf("SERVER ON %s RECEIVED: %s\n”,
                      host, buf);
     write(ns, buf, k);
     close(ns);   close(soc);
     return(0);
}

这是客户：

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>    /* Internet domain header */
#include <netdb.h>
#include <strings.h>
#define SERVER_PORT  59154
struct sockaddr_in peer = {AF_INET}; 

int main(int argc, char* argv[])
{ int soc;
  char buf[256];
  struct hostent *hp;
    if ( argc != 2 )
    {  fprintf(stderr, "Usage: %s hostname\n", argv[0]);
       exit(1);
    }
/* fill in peer address */
    hp = gethostbyname(argv[1]);
    if ( hp == NULL )
    {  fprintf(stderr, "%s: %s unknow host\n",
               argv[0], argv[1]);
       exit(1);
    }
     bzero(&peer, sizeof(peer));
    peer.sin_family = AF_INET;
    peer.sin_addr.s_addr = htonl(INADDR_ANY);
    peer.sin_port = htons(SERVER_PORT);
    bcopy(hp->h_addr_list[0],
          (char*)&peer.sin_addr, hp->h_length);
/* create socket */
    soc = socket(AF_INET, SOCK_STREAM, 0);
/* request connection to server */
    if (connect(soc, (struct sockaddr *)&peer, 
            sizeof(peer)) == -1)
    {  perror("client:connect"); close(soc); exit(1); }
    write(soc, "Hello Internet", 15);
    read(soc, buf, sizeof(buf));
    printf("SERVER ECHOED: %s\n", buf);
    close(soc); return(0);
}