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rdesktop: A Remote Desktop Protocol client. |
rdesktop: A Remote Desktop Protocol client. |
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Protocol services - Virtual channels |
Protocol services - Virtual channels |
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Copyright (C) Erik Forsberg <forsberg@cendio.se> 2003 |
Copyright (C) Erik Forsberg <forsberg@cendio.se> 2003 |
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Copyright (C) Matthew Chapman 2003 |
Copyright (C) Matthew Chapman 2003-2005 |
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This program is free software; you can redistribute it and/or modify |
This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
it under the terms of the GNU General Public License as published by |
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#include "rdesktop.h" |
#include "rdesktop.h" |
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#define MAX_CHANNELS 4 |
#define MAX_CHANNELS 5 |
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#define CHANNEL_CHUNK_LENGTH 1600 |
#define CHANNEL_CHUNK_LENGTH 1600 |
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#define CHANNEL_FLAG_FIRST 0x01 |
#define CHANNEL_FLAG_FIRST 0x01 |
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#define CHANNEL_FLAG_LAST 0x02 |
#define CHANNEL_FLAG_LAST 0x02 |
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{ |
{ |
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uint32 length, flags; |
uint32 length, flags; |
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uint32 thislength, remaining; |
uint32 thislength, remaining; |
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char *data; |
uint8 *data; |
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/* first fragment sent in-place */ |
/* first fragment sent in-place */ |
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s_pop_layer(s, channel_hdr); |
s_pop_layer(s, channel_hdr); |
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length = s->end - s->p - 8; |
length = s->end - s->p - 8; |
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DEBUG_CLIPBOARD(("channel_send, length = %d\n", length)); |
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thislength = MIN(length, CHANNEL_CHUNK_LENGTH); |
thislength = MIN(length, CHANNEL_CHUNK_LENGTH); |
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/* Note: In the original clipboard implementation, this number was |
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1592, not 1600. However, I don't remember the reason and 1600 seems |
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to work so.. This applies only to *this* length, not the length of |
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continuation or ending packets. */ |
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remaining = length - thislength; |
remaining = length - thislength; |
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flags = (remaining == 0) ? CHANNEL_FLAG_FIRST | CHANNEL_FLAG_LAST : CHANNEL_FLAG_FIRST; |
flags = (remaining == 0) ? CHANNEL_FLAG_FIRST | CHANNEL_FLAG_LAST : CHANNEL_FLAG_FIRST; |
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if (channel->flags & CHANNEL_OPTION_SHOW_PROTOCOL) |
if (channel->flags & CHANNEL_OPTION_SHOW_PROTOCOL) |
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out_uint32_le(s, length); |
out_uint32_le(s, length); |
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out_uint32_le(s, flags); |
out_uint32_le(s, flags); |
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data = s->end = s->p + thislength; |
data = s->end = s->p + thislength; |
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DEBUG_CLIPBOARD(("Sending %d bytes with FLAG_FIRST\n", thislength)); |
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sec_send_to_channel(s, g_encryption ? SEC_ENCRYPT : 0, channel->mcs_id); |
sec_send_to_channel(s, g_encryption ? SEC_ENCRYPT : 0, channel->mcs_id); |
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/* subsequent segments copied (otherwise would have to generate headers backwards) */ |
/* subsequent segments copied (otherwise would have to generate headers backwards) */ |
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thislength = MIN(remaining, CHANNEL_CHUNK_LENGTH); |
thislength = MIN(remaining, CHANNEL_CHUNK_LENGTH); |
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remaining -= thislength; |
remaining -= thislength; |
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flags = (remaining == 0) ? CHANNEL_FLAG_LAST : 0; |
flags = (remaining == 0) ? CHANNEL_FLAG_LAST : 0; |
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if (channel->flags & CHANNEL_OPTION_SHOW_PROTOCOL) |
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flags |= CHANNEL_FLAG_SHOW_PROTOCOL; |
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DEBUG_CLIPBOARD(("Sending %d bytes with flags %d\n", thislength, flags)); |
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s = sec_init(g_encryption ? SEC_ENCRYPT : 0, thislength + 8); |
s = sec_init(g_encryption ? SEC_ENCRYPT : 0, thislength + 8); |
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out_uint32_le(s, length); |
out_uint32_le(s, length); |
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{ |
{ |
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uint32 length, flags; |
uint32 length, flags; |
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uint32 thislength; |
uint32 thislength; |
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VCHANNEL *channel; |
VCHANNEL *channel = NULL; |
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unsigned int i; |
unsigned int i; |
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STREAM in; |
STREAM in; |
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{ |
{ |
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if (length > in->size) |
if (length > in->size) |
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{ |
{ |
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in->data = xrealloc(in->data, length); |
in->data = (uint8 *) xrealloc(in->data, length); |
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in->size = length; |
in->size = length; |
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} |
} |
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in->p = in->data; |
in->p = in->data; |