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

   1 /*
   2  * Dropbear SSH
   3  *
   4  * Copyright (c) 2002,2003 Matt Johnston
   5  * Copyright (c) 2004 by Mihnea Stoenescu
   6  * All rights reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  24  * SOFTWARE. */
  25
  26 #include "includes.h"
  27 #include "service.h"
  28 #include "dbutil.h"
  29 #include "packet.h"
  30 #include "buffer.h"
  31 #include "session.h"
  32 #include "ssh.h"
  33
  34 void send_msg_service_request(char* servicename) {
  35
  36         TRACE(("enter send_msg_service_request: servicename='%s'", servicename))
  37
  38         CHECKCLEARTOWRITE();
  39
  40         buf_putbyte(ses.writepayload, SSH_MSG_SERVICE_REQUEST);
  41         buf_putstring(ses.writepayload, servicename, strlen(servicename));
  42
  43         encrypt_packet();
  44         TRACE(("leave send_msg_service_request"))
  45 }
  46
  47 /* This just sets up the state variables right for the main client session loop
  48  * to deal with */
  49 void recv_msg_service_accept() {
  50
  51         unsigned char* servicename;
  52         unsigned int len;
  53
  54         TRACE(("enter recv_msg_service_accept"))
  55
  56         servicename = buf_getstring(ses.payload, &len);
  57
  58         /* ssh-userauth */
  59         if (cli_ses.state == SERVICE_AUTH_REQ_SENT
  60                         && len == SSH_SERVICE_USERAUTH_LEN
  61                         && strncmp(SSH_SERVICE_USERAUTH, servicename, len) == 0) {
  62
  63                 cli_ses.state = SERVICE_AUTH_ACCEPT_RCVD;
  64                 m_free(servicename);
  65                 TRACE(("leave recv_msg_service_accept: done ssh-userauth"))
  66                 return;
  67         }
  68
  69         /* ssh-connection */
  70         if (cli_ses.state == SERVICE_CONN_REQ_SENT
  71                         && len == SSH_SERVICE_CONNECTION_LEN
  72                         && strncmp(SSH_SERVICE_CONNECTION, servicename, len) == 0) {
  73
  74                 if (ses.authstate.authdone != 1) {
  75                         dropbear_exit("Request for connection before auth");
  76                 }
  77
  78                 cli_ses.state = SERVICE_CONN_ACCEPT_RCVD;
  79                 m_free(servicename);
  80                 TRACE(("leave recv_msg_service_accept: done ssh-connection"))
  81                 return;
  82         }
  83
  84         dropbear_exit("Unrecognised service accept");
  85 }