release/src/router/dropbear/svr-service.c

   1 /*
   2  * Dropbear - a SSH2 server
   3  *
   4  * Copyright (c) 2002,2003 Matt Johnston
   5  * All rights reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE. */
  24
  25 #include "includes.h"
  26 #include "dbutil.h"
  27 #include "service.h"
  28 #include "session.h"
  29 #include "packet.h"
  30 #include "ssh.h"
  31 #include "auth.h"
  32
  33 static void send_msg_service_accept(unsigned char *name, int len);
  34
  35 /* processes a SSH_MSG_SERVICE_REQUEST, returning 0 if finished,
  36  * 1 if not */
  37 void recv_msg_service_request() {
  38
  39         unsigned char * name;
  40         unsigned int len;
  41
  42         TRACE(("enter recv_msg_service_request"))
  43
  44         name = buf_getstring(ses.payload, &len);
  45
  46         /* ssh-userauth */
  47         if (len == SSH_SERVICE_USERAUTH_LEN &&
  48                         strncmp(SSH_SERVICE_USERAUTH, name, len) == 0) {
  49
  50                 send_msg_service_accept(name, len);
  51                 m_free(name);
  52                 TRACE(("leave recv_msg_service_request: done ssh-userauth"))
  53                 return;
  54         }
  55
  56         /* ssh-connection */
  57         if (len == SSH_SERVICE_CONNECTION_LEN &&
  58                         (strncmp(SSH_SERVICE_CONNECTION, name, len) == 0)) {
  59                 if (ses.authstate.authdone != 1) {
  60                         dropbear_exit("Request for connection before auth");
  61                 }
  62
  63                 send_msg_service_accept(name, len);
  64                 m_free(name);
  65                 TRACE(("leave recv_msg_service_request: done ssh-connection"))
  66                 return;
  67         }
  68
  69         m_free(name);
  70         /* TODO this should be a MSG_DISCONNECT */
  71         dropbear_exit("Unrecognised SSH_MSG_SERVICE_REQUEST");
  72
  73
  74 }
  75
  76 static void send_msg_service_accept(unsigned char *name, int len) {
  77
  78         TRACE(("accepting service %s", name))
  79
  80         CHECKCLEARTOWRITE();
  81
  82         buf_putbyte(ses.writepayload, SSH_MSG_SERVICE_ACCEPT);
  83         buf_putstring(ses.writepayload, name, len);
  84
  85         encrypt_packet();
  86
  87 }