Exemplo n.º 1
0
static int send_socks_request(struct connreq *conn) {
	int rc = 0;
	
	if (conn->path->type == 4) 
		rc = send_socksv4_request(conn);
	else
		rc = send_socksv5_method(conn);

   return(rc);
}
Exemplo n.º 2
0
static int send_socks_request(struct connreq *conn) {
	int rc = 0;

#ifdef USE_TOR_DNS
    if (conn->path->type == 4) {
        char *name = get_pool_entry(pool, &(conn->connaddr.sin_addr));
        if(name != NULL) {
            rc = send_socksv4a_request(conn,name);
        } else {
            rc = send_socksv4_request(conn);
        }
#else 
    if (conn->path->type == 4) {
      rc = send_socksv4_request(conn);
#endif
    } else {
	  rc = send_socksv5_method(conn);
	}
   return(rc);
}			

#ifdef USE_TOR_DNS
static int send_socksv4a_request(struct connreq *conn,const char *onion_host) 
{
  struct passwd *user;
  struct sockreq *thisreq;
  int endOfUser;
  /* Determine the current username */
  user = getpwuid(getuid());	

  thisreq = (struct sockreq *) conn->buffer;
  endOfUser=sizeof(struct sockreq) +
  (user == NULL ? 0 : strlen(user->pw_name)) + 1;

  /* Check the buffer has enough space for the request  */
  /* and the user name                                  */
  conn->datalen = endOfUser+ 
                  (onion_host == NULL ? 0 : strlen(onion_host)) + 1;
  if (sizeof(conn->buffer) < conn->datalen) {
      show_msg(MSGERR, "The SOCKS username is too long");
      conn->state = FAILED;
      return(ECONNREFUSED);
  }

  /* Create the request */
  thisreq->version = 4;
  thisreq->command = 1;
  thisreq->dstport = conn->connaddr.sin_port;
  thisreq->dstip   = htonl(1);

  /* Copy the username */
  strcpy((char *) thisreq + sizeof(struct sockreq), 
         (user == NULL ? "" : user->pw_name));

  /* Copy the onion host */
  strcpy((char *) thisreq + endOfUser,
         (onion_host == NULL ? "" : onion_host));

  conn->datadone = 0;
  conn->state = SENDING;
  conn->nextstate = SENTV4REQ;

  return(0);   
}
#endif /* USE_TOR_DNS */

static int send_socksv4_request(struct connreq *conn) {
	struct passwd *user;
	struct sockreq *thisreq;
	
	/* Determine the current username */
	user = getpwuid(getuid());	

   thisreq = (struct sockreq *) conn->buffer;

   /* Check the buffer has enough space for the request  */
   /* and the user name                                  */
   conn->datalen = sizeof(struct sockreq) + 
                   (user == NULL ? 0 : strlen(user->pw_name)) + 1;
   if (sizeof(conn->buffer) < conn->datalen) {
      show_msg(MSGERR, "The SOCKS username is too long");
      conn->state = FAILED;
      return(ECONNREFUSED);
   }

	/* Create the request */
	thisreq->version = 4;
	thisreq->command = 1;
	thisreq->dstport = conn->connaddr.sin_port;
	thisreq->dstip   = conn->connaddr.sin_addr.s_addr;

	/* Copy the username */
	strcpy((char *) thisreq + sizeof(struct sockreq), 
	       (user == NULL ? "" : user->pw_name));

   conn->datadone = 0;
   conn->state = SENDING;
   conn->nextstate = SENTV4REQ;

	return(0);   
}			

static int send_socksv5_method(struct connreq *conn) {
   char verstring[] = { 0x05,    /* Version 5 SOCKS */
                        0x02,    /* No. Methods     */
                        0x00,    /* Null Auth       */
                        0x02 };  /* User/Pass Auth  */

   show_msg(MSGDEBUG, "Constructing V5 method negotiation\n");
   conn->state = SENDING;
   conn->nextstate = SENTV5METHOD;
   memcpy(conn->buffer, verstring, sizeof(verstring)); 
   conn->datalen = sizeof(verstring);
   conn->datadone = 0;

   return(0);
}