trunk/rdesktop/channels.c

/* -*- c-basic-offset: 8 -*-
   rdesktop: A Remote Desktop Protocol client.
   Protocol services - Channel register
   Copyright (C) Erik Forsberg <forsberg@cendio.se> 2003

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "rdesktop.h"

static uint16 num_channels;
static rdp5_channel *channels[MAX_RDP5_CHANNELS];

uint16
get_num_channels(void)
{
        return num_channels;
}

/* FIXME: We should use the information in TAG_SRV_SRV_3 to map RDP5
   channels to MCS channels. 

   The format of TAG_SRV_SRV_3 seems to be

   global_channel_no (uint16le)
   number_of_other_channels (uint16le)
   ..followed by uint16les for the other channels.
   Might be a few (two) bytes of padding at the end.

*/

void
register_channel(char *name, uint32 flags, void (*callback) (STREAM, uint16))
{
        if (num_channels > MAX_RDP5_CHANNELS)
        {
                error("Maximum number of RDP5 channels reached. Redefine MAX_RDP5_CHANNELS in constants.h and recompile!\n!");
        }
        num_channels++;
        channels[num_channels - 1] = xrealloc(channels[num_channels - 1],
                                              sizeof(rdp5_channel) * num_channels);
        channels[num_channels - 1]->channelno = MCS_GLOBAL_CHANNEL + num_channels;
        strcpy(channels[num_channels - 1]->name, name);
        channels[num_channels - 1]->channelflags = flags;
        channels[num_channels - 1]->channelcallback = callback;
}

rdp5_channel *
find_channel_by_channelno(uint16 channelno)
{
        if (channelno > MCS_GLOBAL_CHANNEL + num_channels)
        {
                warning("Channel %d not defined. Highest channel defined is %d\n",
                        channelno, MCS_GLOBAL_CHANNEL + num_channels);
                return NULL;
        }
        else
        {
                return channels[channelno - MCS_GLOBAL_CHANNEL - 1];
        }
}

rdp5_channel *
find_channel_by_num(uint16 num)
{
        if (num > num_channels)
        {
                error("There are only %d channels defined, channel %d doesn't exist\n",
                      num_channels, num);
        }
        else
        {
                return channels[num];
        }
        return NULL;            // Shut the compiler up
}


void
dummy_callback(STREAM s, uint16 channelno)
{
        warning("Server is sending information on our dummy channel (%d). Why?\n", channelno);
}

void
channels_init(void)
{
        DEBUG_RDP5(("channels_init\n"));
        register_channel("dummych", 0xc0a0, dummy_callback);
        register_channel("cliprdr", 0xc0a0, cliprdr_callback);
}
1	forsberg	400	/* -- c-basic-offset: 8 --
2			rdesktop: A Remote Desktop Protocol client.
3			Protocol services - Channel register
4			Copyright (C) Erik Forsberg <forsberg@cendio.se> 2003
5
6			This program is free software; you can redistribute it and/or modify
7			it under the terms of the GNU General Public License as published by
8			the Free Software Foundation; either version 2 of the License, or
9			(at your option) any later version.
10
11			This program is distributed in the hope that it will be useful,
12			but WITHOUT ANY WARRANTY; without even the implied warranty of
13			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			GNU General Public License for more details.
15
16			You should have received a copy of the GNU General Public License
17			along with this program; if not, write to the Free Software
18			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19			*/
20
21			#include "rdesktop.h"
22
23			static uint16 num_channels;
24			static rdp5_channel *channels[MAX_RDP5_CHANNELS];
25
26			uint16
27			get_num_channels(void)
28			{
29			return num_channels;
30			}
31
32	forsberg	419	/* FIXME: We should use the information in TAG_SRV_SRV_3 to map RDP5
33			channels to MCS channels.
34
35			The format of TAG_SRV_SRV_3 seems to be
36
37			global_channel_no (uint16le)
38			number_of_other_channels (uint16le)
39			..followed by uint16les for the other channels.
40			Might be a few (two) bytes of padding at the end.
41
42			*/
43
44	forsberg	400	void
45			register_channel(char name, uint32 flags, void (callback) (STREAM, uint16))
46			{
47			if (num_channels > MAX_RDP5_CHANNELS)
48			{
49			error("Maximum number of RDP5 channels reached. Redefine MAX_RDP5_CHANNELS in constants.h and recompile!\n!");
50			}
51			num_channels++;
52			channels[num_channels - 1] = xrealloc(channels[num_channels - 1],
53			sizeof(rdp5_channel) * num_channels);
54			channels[num_channels - 1]->channelno = MCS_GLOBAL_CHANNEL + num_channels;
55			strcpy(channels[num_channels - 1]->name, name);
56			channels[num_channels - 1]->channelflags = flags;
57			channels[num_channels - 1]->channelcallback = callback;
58			}
59
60			rdp5_channel *
61			find_channel_by_channelno(uint16 channelno)
62			{
63			if (channelno > MCS_GLOBAL_CHANNEL + num_channels)
64			{
65			warning("Channel %d not defined. Highest channel defined is %d\n",
66			channelno, MCS_GLOBAL_CHANNEL + num_channels);
67			return NULL;
68			}
69			else
70			{
71			return channels[channelno - MCS_GLOBAL_CHANNEL - 1];
72			}
73			}
74
75			rdp5_channel *
76			find_channel_by_num(uint16 num)
77			{
78			if (num > num_channels)
79			{
80			error("There are only %d channels defined, channel %d doesn't exist\n",
81			num_channels, num);
82			}
83			else
84			{
85			return channels[num];
86			}
87			return NULL; // Shut the compiler up
88			}
89
90
91
92			void
93			dummy_callback(STREAM s, uint16 channelno)
94			{
95			warning("Server is sending information on our dummy channel (%d). Why?\n", channelno);
96			}
97
98			void
99			channels_init(void)
100			{
101			DEBUG_RDP5(("channels_init\n"));
102			register_channel("dummych", 0xc0a0, dummy_callback);
103			register_channel("cliprdr", 0xc0a0, cliprdr_callback);
104			}