ReactOS 0.4.15-dev-8348-gc1b9bb5
parse.h
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1/*
2 rdesktop: A Remote Desktop Protocol client.
3 Parsing primitives
4 Copyright (C) Matthew Chapman 1999-2008
5 Copyright 2012 Henrik Andersson <hean01@cendio.se> for Cendio AB
6
7 This program is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19*/
20
21/* Parser state */
22typedef struct stream
23{
24 unsigned char *p;
25 unsigned char *end;
26 unsigned char *data;
27 unsigned int size;
28
29 /* Offsets of various headers */
30 unsigned char *iso_hdr;
31 unsigned char *mcs_hdr;
32 unsigned char *sec_hdr;
33 unsigned char *rdp_hdr;
34 unsigned char *channel_hdr;
35
36}
38
39#define s_push_layer(s,h,n) { (s)->h = (s)->p; (s)->p += n; }
40#define s_pop_layer(s,h) (s)->p = (s)->h;
41#define s_mark_end(s) (s)->end = (s)->p;
42#define s_check(s) ((s)->p <= (s)->end)
43#define s_check_rem(s,n) ((s)->p + n <= (s)->end)
44#define s_check_end(s) ((s)->p == (s)->end)
45#define s_length(s) ((s)->end - (s)->data)
46#define s_reset(s) ((s)->end = (s)->p = (s)->data)
47
48#if defined(L_ENDIAN) && !defined(NEED_ALIGN)
49#define in_uint16_le(s,v) { v = *(uint16 *)((s)->p); (s)->p += 2; }
50#define in_uint32_le(s,v) { v = *(uint32 *)((s)->p); (s)->p += 4; }
51#define out_uint16_le(s,v) { *(uint16 *)((s)->p) = v; (s)->p += 2; }
52#define out_uint32_le(s,v) { *(uint32 *)((s)->p) = v; (s)->p += 4; }
53
54#else
55#define in_uint16_le(s,v) { v = *((s)->p++); v += *((s)->p++) << 8; }
56#define in_uint32_le(s,v) { in_uint16_le(s,v) \
57 v += *((s)->p++) << 16; v += *((s)->p++) << 24; }
58#define out_uint16_le(s,v) { *((s)->p++) = (v) & 0xff; *((s)->p++) = ((v) >> 8) & 0xff; }
59#define out_uint32_le(s,v) { out_uint16_le(s, (v) & 0xffff); out_uint16_le(s, ((v) >> 16) & 0xffff); }
60#endif
61
62#if defined(B_ENDIAN) && !defined(NEED_ALIGN)
63#define in_uint16_be(s,v) { v = *(uint16 *)((s)->p); (s)->p += 2; }
64#define in_uint32_be(s,v) { v = *(uint32 *)((s)->p); (s)->p += 4; }
65#define out_uint16_be(s,v) { *(uint16 *)((s)->p) = v; (s)->p += 2; }
66#define out_uint32_be(s,v) { *(uint32 *)((s)->p) = v; (s)->p += 4; }
67
68#define B_ENDIAN_PREFERRED
69#define in_uint16(s,v) in_uint16_be(s,v)
70#define in_uint32(s,v) in_uint32_be(s,v)
71#define out_uint16(s,v) out_uint16_be(s,v)
72#define out_uint32(s,v) out_uint32_be(s,v)
73
74#else
75#define in_uint16_be(s,v) { v = *((s)->p++); next_be(s,v); }
76#define in_uint32_be(s,v) { in_uint16_be(s,v); next_be(s,v); next_be(s,v); }
77#define out_uint16_be(s,v) { *((s)->p++) = ((v) >> 8) & 0xff; *((s)->p++) = (v) & 0xff; }
78#define out_uint32_be(s,v) { out_uint16_be(s, ((v) >> 16) & 0xffff); out_uint16_be(s, (v) & 0xffff); }
79#endif
80
81#ifndef B_ENDIAN_PREFERRED
82#define in_uint16(s,v) in_uint16_le(s,v)
83#define in_uint32(s,v) in_uint32_le(s,v)
84#define out_uint16(s,v) out_uint16_le(s,v)
85#define out_uint32(s,v) out_uint32_le(s,v)
86#endif
87
88#define in_uint8(s,v) v = *((s)->p++);
89#define in_uint8p(s,v,n) { v = (s)->p; (s)->p += n; }
90#define in_uint8a(s,v,n) { memcpy(v,(s)->p,n); (s)->p += n; }
91#define in_uint8s(s,n) (s)->p += n;
92#define out_uint8(s,v) *((s)->p++) = v;
93#define out_uint8p(s,v,n) { memcpy((s)->p,v,n); (s)->p += n; }
94#define out_uint8a(s,v,n) out_uint8p(s,v,n);
95#define out_uint8s(s,n) { memset((s)->p,0,n); (s)->p += n; }
96
97#define next_be(s,v) v = ((v) << 8) + *((s)->p++);
struct stream * STREAM
Definition: parse.h:23
unsigned char * channel_hdr
Definition: parse.h:34
unsigned char * iso_hdr
Definition: parse.h:30
unsigned char * end
Definition: parse.h:25
unsigned char * sec_hdr
Definition: parse.h:32
unsigned char * p
Definition: parse.h:24
unsigned char * mcs_hdr
Definition: parse.h:31
unsigned int size
Definition: parse.h:27
unsigned char * data
Definition: parse.h:26
unsigned char * rdp_hdr
Definition: parse.h:33