Improve Fast-Path code readability
Using constants and field definitions from MS-RDPBCGR.
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21
constants.h
21
constants.h
@ -23,6 +23,27 @@
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#define DEFAULT_CODEPAGE "UTF-8"
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#define WINDOWS_CODEPAGE "UTF-16LE"
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/* [MS-RDPBCGR] 2.2.9.1.2.1 */
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/* adjusted for position in updateHeader */
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#define FASTPATH_UPDATETYPE_ORDERS 0x0
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#define FASTPATH_UPDATETYPE_BITMAP 0x1
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#define FASTPATH_UPDATETYPE_PALETTE 0x2
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#define FASTPATH_UPDATETYPE_SYNCHRONIZE 0x3
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#define FASTPATH_UPDATETYPE_SURFCMDS 0x4
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#define FASTPATH_UPDATETYPE_PTR_NULL 0x5
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#define FASTPATH_UPDATETYPE_PTR_DEFAULT 0x6
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#define FASTPATH_UPDATETYPE_PTR_POSITION 0x8
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#define FASTPATH_UPDATETYPE_COLOR 0x9
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#define FASTPATH_UPDATETYPE_CACHED 0xA
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#define FASTPATH_UPDATETYPE_POINTER 0xB
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#define FASTPATH_FRAGMENT_SINGLE (0x0 << 4)
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#define FASTPATH_FRAGMENT_LAST (0x1 << 4)
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#define FASTPATH_FRAGMENT_FIRST (0x2 << 4)
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#define FASTPATH_FRAGMENT_NEXT (0x3 << 4)
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#define FASTPATH_OUTPUT_COMPRESSION_USED (0x2 << 6)
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/* ISO PDU codes */
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enum ISO_PDU_CODE
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{
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2
proto.h
2
proto.h
@ -144,7 +144,7 @@ int rd_write_file(int fd, void *ptr, int len);
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int rd_lseek_file(int fd, int offset);
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RD_BOOL rd_lock_file(int fd, int start, int len);
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/* rdp5.c */
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void rdp5_process(STREAM s);
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void process_ts_fp_updates(STREAM s);
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/* rdp.c */
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void rdp_in_unistr(STREAM s, int in_len, char **string, uint32 * str_size);
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void rdp_send_input(uint32 time, uint16 message_type, uint16 device_flags, uint16 param1,
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4
rdp.c
4
rdp.c
@ -104,8 +104,8 @@ rdp_recv(uint8 * type)
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}
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else if (rdpver != 3)
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{
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/* rdp5_process should move g_next_packet ok */
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rdp5_process(rdp_s);
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/* process_ts_fp_updates moves g_next_packet */
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process_ts_fp_updates(rdp_s);
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*type = 0;
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return rdp_s;
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}
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57
rdp5.c
57
rdp5.c
@ -1,6 +1,6 @@
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/* -*- c-basic-offset: 8 -*-
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rdesktop: A Remote Desktop Protocol client.
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Protocol services - RDP5 short form PDU processing
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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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@ -26,10 +26,10 @@ 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)
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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 type, ctype;
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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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@ -39,25 +39,24 @@ rdp5_process(STREAM s)
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ui_begin_update();
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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 & RDP5_COMPRESSED)
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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 ^= RDP5_COMPRESSED;
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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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/* 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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"rdp5_process(), error while decompressing packet");
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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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@ -74,46 +73,46 @@ rdp5_process(STREAM s)
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else
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ts = s;
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switch (type)
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switch (code)
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{
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case 0: /* update orders */
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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 1: /* update bitmap */
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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 2: /* update palette */
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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 3: /* update synchronize */
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case FASTPATH_UPDATETYPE_SYNCHRONIZE:
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break;
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case 5: /* null pointer */
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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 6: /* default pointer */
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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 8: /* pointer position */
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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 9: /* color pointer */
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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 10: /* cached pointer */
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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 11:
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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, "rdp5_process(), unhandled opcode %d",
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type);
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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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