ReactOS 0.4.15-dev-8408-g466a198
parse.h
Go to the documentation of this file.
1/*
2 rdesktop: A Remote Desktop Protocol client.
3 Parsing primitives
4 Copyright (C) Matthew Chapman 1999-2005
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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
46#if defined(L_ENDIAN) && !defined(NEED_ALIGN)
47#define in_uint16_le(s,v) { v = *(uint16 *)((s)->p); (s)->p += 2; }
48#define in_uint32_le(s,v) { v = *(uint32 *)((s)->p); (s)->p += 4; }
49#define out_uint16_le(s,v) { *(uint16 *)((s)->p) = v; (s)->p += 2; }
50#define out_uint32_le(s,v) { *(uint32 *)((s)->p) = v; (s)->p += 4; }
51
52#else
53#define in_uint16_le(s,v) { v = *((s)->p++); v += *((s)->p++) << 8; }
54#define in_uint32_le(s,v) { in_uint16_le(s,v) \
55 v += *((s)->p++) << 16; v += *((s)->p++) << 24; }
56#define out_uint16_le(s,v) { *((s)->p++) = (v) & 0xff; *((s)->p++) = ((v) >> 8) & 0xff; }
57#define out_uint32_le(s,v) { out_uint16_le(s, (v) & 0xffff); out_uint16_le(s, ((v) >> 16) & 0xffff); }
58#endif
59
60#if defined(B_ENDIAN) && !defined(NEED_ALIGN)
61#define in_uint16_be(s,v) { v = *(uint16 *)((s)->p); (s)->p += 2; }
62#define in_uint32_be(s,v) { v = *(uint32 *)((s)->p); (s)->p += 4; }
63#define out_uint16_be(s,v) { *(uint16 *)((s)->p) = v; (s)->p += 2; }
64#define out_uint32_be(s,v) { *(uint32 *)((s)->p) = v; (s)->p += 4; }
65
66#define B_ENDIAN_PREFERRED
67#define in_uint16(s,v) in_uint16_be(s,v)
68#define in_uint32(s,v) in_uint32_be(s,v)
69#define out_uint16(s,v) out_uint16_be(s,v)
70#define out_uint32(s,v) out_uint32_be(s,v)
71
72#else
73#define in_uint16_be(s,v) { v = *((s)->p++); next_be(s,v); }
74#define in_uint32_be(s,v) { in_uint16_be(s,v); next_be(s,v); next_be(s,v); }
75#define out_uint16_be(s,v) { *((s)->p++) = (uint8)((v) >> 8) & 0xff; *((s)->p++) = (uint8)((v) & 0xff); }
76#define out_uint32_be(s,v) { out_uint16_be(s, (uint16)(((v) >> 16) & 0xffff)); out_uint16_be(s, (uint16)((v) & 0xffff)); }
77#endif
78
79#ifndef B_ENDIAN_PREFERRED
80#define in_uint16(s,v) in_uint16_le(s,v)
81#define in_uint32(s,v) in_uint32_le(s,v)
82#define out_uint16(s,v) out_uint16_le(s,v)
83#define out_uint32(s,v) out_uint32_le(s,v)
84#endif
85
86#define in_uint8(s,v) v = *((s)->p++);
87#define in_uint8p(s,v,n) { v = (s)->p; (s)->p += n; }
88#define in_uint8a(s,v,n) { memcpy(v,(s)->p,n); (s)->p += n; }
89#define in_uint8s(s,n) (s)->p += n;
90#define out_uint8(s,v) *((s)->p++) = v;
91#define out_uint8p(s,v,n) { memcpy((s)->p,v,n); (s)->p += n; }
92#define out_uint8a(s,v,n) out_uint8p(s,v,n);
93#define out_uint8s(s,n) { memset((s)->p,0,n); (s)->p += n; }
94
95#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