Thread: Telnet-client, get abracadabra from server

Code:

#include <stdio.h>
#include <sys/socket.h>
#include <netdb.h>
#include <stdlib.h>
#include <string.h>

#define BUF_LEN 1024
#define PORT 23

int main (void)
{
   int sock=socket(PF_INET, SOCK_STREAM,0);
                       if(sock==-1)  {perror("socket()="); return 0;}


      struct sockaddr_in addr;
      addr.sin_family = AF_INET;
      
      struct hostent *host=gethostbyname("192.168.56.101");
        perror("gethostbyname()=");

     addr.sin_addr =*(struct in_addr*)
	              	host->h_addr_list[0];

     addr.sin_port=htons(PORT);

     int con=connect(sock,(struct sockaddr*) &addr, sizeof(addr));
     perror("connect()=");

     if (con==-1)return 0;

     char buf[BUF_LEN];
     int count;

      while ( (count=read(sock,buf, 2))>0 ) 
                                                      write (1,buf,count);

      close(sock); 

return 0;
}

result in console:

Code:

[up@COR ~]$ ./telc
gethostbyname()=: Success
connect()=: Success
���� ��#��'^X
^C

How can i get normal symbols? Where is my mistake?

Telnet - Wikipedia, the free encyclopedia

are you sure its a telnet server and not ssh?

i'm sure, because it is my telnet-server, and i can connect with it through standard telnet-client

Maybe the server wants to perform option negotation and you're reading that stuff and not characters you were expecting.