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/* -*- 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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|
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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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|
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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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|
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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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|
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#include "rdesktop.h" |
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|
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extern uint8 *g_next_packet; |
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|
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extern RDPCOMP g_mppc_dict; |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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if (ctype & RDP_MPPC_COMPRESSED) |
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{ |
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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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|
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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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|
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memcpy((ns->data), (unsigned char *) (g_mppc_dict.hist + roff), rlen); |
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|
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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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|
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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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|
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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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|
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s->p = next; |
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} |
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} |
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