ReactOS  r76032
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 */
22 typedef 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 }
37  *STREAM;
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++);
unsigned char * rdp_hdr
Definition: parse.h:33
unsigned char * data
Definition: parse.h:26
unsigned char * mcs_hdr
Definition: parse.h:31
struct stream * STREAM
unsigned char * iso_hdr
Definition: parse.h:30
unsigned char * end
Definition: parse.h:25
unsigned int size
Definition: parse.h:27
Definition: parse.h:22
unsigned char * p
Definition: parse.h:24
unsigned char * sec_hdr
Definition: parse.h:32
unsigned char * channel_hdr
Definition: parse.h:34