listener.h

   1 /*
   2  * Dropbear SSH
   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 #ifndef _LISTENER_H
  26 #define _LISTENER_H
  27
  28 #define MAX_LISTENERS 20
  29 #define LISTENER_EXTEND_SIZE 1
  30
  31 struct Listener {
  32
  33         int socks[DROPBEAR_MAX_SOCKS];
  34         unsigned int nsocks;
  35
  36         int index; /* index in the array of listeners */
  37
  38         void (*acceptor)(struct Listener*, int sock);
  39         void (*cleanup)(struct Listener*);
  40
  41         int type; /* CHANNEL_ID_X11, CHANNEL_ID_AGENT,
  42                                  CHANNEL_ID_TCPDIRECT (for clients),
  43                                  CHANNEL_ID_TCPFORWARDED (for servers) */
  44
  45         void *typedata;
  46
  47 };
  48
  49 void listeners_initialise();
  50 void handle_listeners(fd_set * readfds);
  51 void set_listener_fds(fd_set * readfds);
  52
  53 struct Listener* new_listener(int socks[], unsigned int nsocks,
  54                 int type, void* typedata,
  55                 void (*acceptor)(struct Listener* listener, int sock),
  56                 void (*cleanup)(struct Listener*));
  57
  58 struct Listener * get_listener(int type, void* typedata,
  59                 int (*match)(void*, void*));
  60
  61 void remove_listener(struct Listener* listener);
  62
  63 #endif /* _LISTENER_H */