ecdd66ff04
git-svn-id: svn://svn.code.sf.net/p/rdesktop/code/trunk/rdesktop@686 423420c4-83ab-492f-b58f-81f9feb106b5
129 lines
3.0 KiB
C
129 lines
3.0 KiB
C
/* -*- c-basic-offset: 8 -*-
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rdesktop: A Remote Desktop Protocol client.
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Protocol services - Multipoint Communications Service
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Copyright (C) Matthew Chapman 1999-2002
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Copyright (C) Erik Forsberg 2003
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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
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "rdesktop.h"
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extern uint8 *g_next_packet;
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extern RDPCOMP g_mppc_dict;
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void
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rdp5_process(STREAM s, BOOL encryption)
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{
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uint16 length, count, x, y;
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uint8 type, ctype;
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uint8 *next;
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uint32 roff, rlen;
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struct stream *ns = &(g_mppc_dict.ns);
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struct stream *ts;
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if (encryption)
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{
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in_uint8s(s, 8); /* signature */
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sec_decrypt(s->p, s->end - s->p);
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}
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#if 0
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printf("RDP5 data:\n");
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hexdump(s->p, s->end - s->p);
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#endif
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while (s->p < s->end)
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{
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in_uint8(s, type);
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if (type & RDP_COMPRESSION)
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{
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in_uint8(s, ctype);
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in_uint16_le(s, length);
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type ^= RDP_COMPRESSION;
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}
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else
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{
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ctype = 0;
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in_uint16_le(s, length);
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}
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g_next_packet = next = s->p + length;
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if (ctype & RDP_MPPC_COMPRESSED)
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{
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if (mppc_expand(s->p, length, ctype, &roff, &rlen) == -1)
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error("error while decompressing packet\n");
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/* allocate memory and copy the uncompressed data into the temporary stream */
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ns->data = xrealloc(ns->data, rlen);
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memcpy((ns->data), (unsigned char *) (g_mppc_dict.hist + roff), rlen);
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ns->size = rlen;
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ns->end = (ns->data + ns->size);
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ns->p = ns->data;
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ns->rdp_hdr = ns->p;
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ts = ns;
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}
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else
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ts = s;
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switch (type)
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{
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/* Thanks to Jeroen Meijer <jdmeijer at yahoo
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dot com> for finding out the meaning of
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most of the opcodes here. Especially opcode
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8! :) */
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case 0: /* orders */
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in_uint16_le(ts, count);
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process_orders(ts, count);
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break;
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case 1: /* bitmap update (???) */
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in_uint8s(ts, 2); /* part length */
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process_bitmap_updates(ts);
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break;
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case 2: /* palette */
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in_uint8s(ts, 2); /* uint16 = 2 */
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process_palette(ts);
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break;
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case 3: /* probably an palette with offset 3. Weird */
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break;
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case 5:
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ui_set_null_cursor();
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break;
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case 8:
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in_uint16_le(ts, x);
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in_uint16_le(ts, y);
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if (s_check(ts))
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ui_move_pointer(x, y);
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break;
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case 9:
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process_colour_pointer_pdu(ts);
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break;
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case 10:
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process_cached_pointer_pdu(ts);
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break;
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default:
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unimpl("RDP5 opcode %d\n", type);
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}
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s->p = next;
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}
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}
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