diff options
Diffstat (limited to 'uirdesktop/channels.c')
| -rw-r--r-- | uirdesktop/channels.c | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/uirdesktop/channels.c b/uirdesktop/channels.c deleted file mode 100644 index 389cce2e..00000000 --- a/uirdesktop/channels.c +++ /dev/null @@ -1,181 +0,0 @@ -/* -*- c-basic-offset: 8 -*- - rdesktop: A Remote Desktop Protocol client. - Protocol services - Virtual channels - Copyright (C) Erik Forsberg <forsberg@cendio.se> 2003 - Copyright (C) Matthew Chapman 2003-2005 - - 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" - -#define MAX_CHANNELS 6 -#define CHANNEL_CHUNK_LENGTH 1600 -#define CHANNEL_FLAG_FIRST 0x01 -#define CHANNEL_FLAG_LAST 0x02 -#define CHANNEL_FLAG_SHOW_PROTOCOL 0x10 - -extern BOOL g_use_rdp5; -extern BOOL g_encryption; - -VCHANNEL g_channels[MAX_CHANNELS]; -unsigned int g_num_channels; - -/* FIXME: We should use the information in TAG_SRV_CHANNELS to map RDP5 - channels to MCS channels. - - The format of TAG_SRV_CHANNELS seems to be - - global_channel_no (uint16le) - number_of_other_channels (uint16le) - ..followed by uint16les for the other channels. -*/ - -VCHANNEL * -channel_register(char *name, uint32 flags, void (*callback) (STREAM)) -{ - VCHANNEL *channel; - - if (!g_use_rdp5) - return NULL; - - if (g_num_channels >= MAX_CHANNELS) - { - error("Channel table full, increase MAX_CHANNELS\n"); - return NULL; - } - - channel = &g_channels[g_num_channels]; - channel->mcs_id = MCS_GLOBAL_CHANNEL + 1 + g_num_channels; - strncpy(channel->name, name, 8); - channel->flags = flags; - channel->process = callback; - g_num_channels++; - return channel; -} - -STREAM -channel_init(VCHANNEL * channel, uint32 length) -{ - STREAM s; - - s = sec_init(g_encryption ? SEC_ENCRYPT : 0, length + 8); - s_push_layer(s, channel_hdr, 8); - return s; -} - -void -channel_send(STREAM s, VCHANNEL * channel) -{ - uint32 length, flags; - uint32 thislength, remaining; - uint8 *data; - - /* first fragment sent in-place */ - s_pop_layer(s, channel_hdr); - length = s->end - s->p - 8; - - DEBUG_CHANNEL(("channel_send, length = %d\n", length)); - - thislength = MIN(length, CHANNEL_CHUNK_LENGTH); -/* Note: In the original clipboard implementation, this number was - 1592, not 1600. However, I don't remember the reason and 1600 seems - to work so.. This applies only to *this* length, not the length of - continuation or ending packets. */ - remaining = length - thislength; - flags = (remaining == 0) ? CHANNEL_FLAG_FIRST | CHANNEL_FLAG_LAST : CHANNEL_FLAG_FIRST; - if (channel->flags & CHANNEL_OPTION_SHOW_PROTOCOL) - flags |= CHANNEL_FLAG_SHOW_PROTOCOL; - - out_uint32_le(s, length); - out_uint32_le(s, flags); - data = s->end = s->p + thislength; - DEBUG_CHANNEL(("Sending %d bytes with FLAG_FIRST\n", thislength)); - sec_send_to_channel(s, g_encryption ? SEC_ENCRYPT : 0, channel->mcs_id); - - /* subsequent segments copied (otherwise would have to generate headers backwards) */ - while (remaining > 0) - { - thislength = MIN(remaining, CHANNEL_CHUNK_LENGTH); - remaining -= thislength; - flags = (remaining == 0) ? CHANNEL_FLAG_LAST : 0; - if (channel->flags & CHANNEL_OPTION_SHOW_PROTOCOL) - flags |= CHANNEL_FLAG_SHOW_PROTOCOL; - - DEBUG_CHANNEL(("Sending %d bytes with flags %d\n", thislength, flags)); - - s = sec_init(g_encryption ? SEC_ENCRYPT : 0, thislength + 8); - out_uint32_le(s, length); - out_uint32_le(s, flags); - out_uint8p(s, data, thislength); - s_mark_end(s); - sec_send_to_channel(s, g_encryption ? SEC_ENCRYPT : 0, channel->mcs_id); - - data += thislength; - } -} - -void -channel_process(STREAM s, uint16 mcs_channel) -{ - uint32 length, flags; - uint32 thislength; - VCHANNEL *channel = NULL; - unsigned int i; - STREAM in; - - for (i = 0; i < g_num_channels; i++) - { - channel = &g_channels[i]; - if (channel->mcs_id == mcs_channel) - break; - } - - if (i >= g_num_channels) - return; - - in_uint32_le(s, length); - in_uint32_le(s, flags); - if ((flags & CHANNEL_FLAG_FIRST) && (flags & CHANNEL_FLAG_LAST)) - { - /* single fragment - pass straight up */ - channel->process(s); - } - else - { - /* add fragment to defragmentation buffer */ - in = &channel->in; - if (flags & CHANNEL_FLAG_FIRST) - { - if (length > in->size) - { - in->data = (uint8 *) xrealloc(in->data, length); - in->size = length; - } - in->p = in->data; - } - - thislength = MIN(s->end - s->p, in->data + in->size - in->p); - memcpy(in->p, s->p, thislength); - in->p += thislength; - - if (flags & CHANNEL_FLAG_LAST) - { - in->end = in->p; - in->p = in->data; - channel->process(in); - } - } -} |