122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
/* -*- c-basic-offset: 8 -*-
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rdesktop: A Remote Desktop Protocol client.
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Protocol services - RDP Fast-Path PDU processing
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Copyright (C) Matthew Chapman <matthewc.unsw.edu.au> 1999-2008
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Copyright 2003-2008 Erik Forsberg <forsberg@cendio.se> for Cendio AB
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Copyright 2017 Karl Mikaelsson <derfian@cendio.se> for Cendio AB
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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 3 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, see <http://www.gnu.org/licenses/>.
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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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process_ts_fp_updates(STREAM s)
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{
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uint16 length, count, x, y;
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uint8 hdr, code, frag, comp, ctype = 0;
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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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ui_begin_update();
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while (s->p < s->end)
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{
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/* Reading a number of TS_FP_UPDATE structures from the stream here.. */
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in_uint8(s, hdr); /* updateHeader */
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code = hdr & 0x0F; /* |- updateCode */
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frag = hdr & 0x30; /* |- fragmentation */
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comp = hdr & 0xC0; /* `- compression */
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if (comp & FASTPATH_OUTPUT_COMPRESSION_USED)
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in_uint8(s, ctype); /* compressionFlags */
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in_uint16_le(s, length); /* length */
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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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logger(Protocol, Error,
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"process_ts_fp_update_pdu(), error while decompressing packet");
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/* allocate memory and copy the uncompressed data into the temporary stream */
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ns->data = (uint8 *) 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 (code)
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{
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case FASTPATH_UPDATETYPE_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 FASTPATH_UPDATETYPE_BITMAP:
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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 FASTPATH_UPDATETYPE_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 FASTPATH_UPDATETYPE_SYNCHRONIZE:
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break;
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case FASTPATH_UPDATETYPE_PTR_NULL:
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ui_set_null_cursor();
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break;
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case FASTPATH_UPDATETYPE_PTR_DEFAULT:
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set_system_pointer(SYSPTR_DEFAULT);
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break;
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case FASTPATH_UPDATETYPE_PTR_POSITION:
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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 FASTPATH_UPDATETYPE_COLOR:
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process_colour_pointer_pdu(ts);
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break;
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case FASTPATH_UPDATETYPE_CACHED:
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process_cached_pointer_pdu(ts);
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break;
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case FASTPATH_UPDATETYPE_POINTER:
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process_new_pointer_pdu(ts);
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break;
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default:
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logger(Protocol, Warning, "process_ts_fp_updates(), unhandled opcode %d",
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code);
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}
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s->p = next;
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}
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ui_end_update();
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}
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