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Reactos
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3.7 kB · 97 lines
C
at master
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798/* rdesktop: A Remote Desktop Protocol client. Parsing primitives Copyright (C) Matthew Chapman 1999-2008 Copyright 2012 Henrik Andersson <hean01@cendio.se> for Cendio AB
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.*/
/* Parser state */typedef struct stream{ unsigned char *p; unsigned char *end; unsigned char *data; unsigned int size;
/* Offsets of various headers */ unsigned char *iso_hdr; unsigned char *mcs_hdr; unsigned char *sec_hdr; unsigned char *rdp_hdr; unsigned char *channel_hdr;
} *STREAM;
#define s_push_layer(s,h,n) { (s)->h = (s)->p; (s)->p += n; }#define s_pop_layer(s,h) (s)->p = (s)->h;#define s_mark_end(s) (s)->end = (s)->p;#define s_check(s) ((s)->p <= (s)->end)#define s_check_rem(s,n) ((s)->p + n <= (s)->end)#define s_check_end(s) ((s)->p == (s)->end)#define s_length(s) ((s)->end - (s)->data)#define s_reset(s) ((s)->end = (s)->p = (s)->data)
#if defined(L_ENDIAN) && !defined(NEED_ALIGN)#define in_uint16_le(s,v) { v = *(uint16 *)((s)->p); (s)->p += 2; }#define in_uint32_le(s,v) { v = *(uint32 *)((s)->p); (s)->p += 4; }#define out_uint16_le(s,v) { *(uint16 *)((s)->p) = v; (s)->p += 2; }#define out_uint32_le(s,v) { *(uint32 *)((s)->p) = v; (s)->p += 4; }
#else#define in_uint16_le(s,v) { v = *((s)->p++); v += *((s)->p++) << 8; }#define in_uint32_le(s,v) { in_uint16_le(s,v) \ v += *((s)->p++) << 16; v += *((s)->p++) << 24; }#define out_uint16_le(s,v) { *((s)->p++) = (v) & 0xff; *((s)->p++) = ((v) >> 8) & 0xff; }#define out_uint32_le(s,v) { out_uint16_le(s, (v) & 0xffff); out_uint16_le(s, ((v) >> 16) & 0xffff); }#endif
#if defined(B_ENDIAN) && !defined(NEED_ALIGN)#define in_uint16_be(s,v) { v = *(uint16 *)((s)->p); (s)->p += 2; }#define in_uint32_be(s,v) { v = *(uint32 *)((s)->p); (s)->p += 4; }#define out_uint16_be(s,v) { *(uint16 *)((s)->p) = v; (s)->p += 2; }#define out_uint32_be(s,v) { *(uint32 *)((s)->p) = v; (s)->p += 4; }
#define B_ENDIAN_PREFERRED#define in_uint16(s,v) in_uint16_be(s,v)#define in_uint32(s,v) in_uint32_be(s,v)#define out_uint16(s,v) out_uint16_be(s,v)#define out_uint32(s,v) out_uint32_be(s,v)
#else#define in_uint16_be(s,v) { v = *((s)->p++); next_be(s,v); }#define in_uint32_be(s,v) { in_uint16_be(s,v); next_be(s,v); next_be(s,v); }#define out_uint16_be(s,v) { *((s)->p++) = ((v) >> 8) & 0xff; *((s)->p++) = (v) & 0xff; }#define out_uint32_be(s,v) { out_uint16_be(s, ((v) >> 16) & 0xffff); out_uint16_be(s, (v) & 0xffff); }#endif
#ifndef B_ENDIAN_PREFERRED#define in_uint16(s,v) in_uint16_le(s,v)#define in_uint32(s,v) in_uint32_le(s,v)#define out_uint16(s,v) out_uint16_le(s,v)#define out_uint32(s,v) out_uint32_le(s,v)#endif
#define in_uint8(s,v) v = *((s)->p++);#define in_uint8p(s,v,n) { v = (s)->p; (s)->p += n; }#define in_uint8a(s,v,n) { memcpy(v,(s)->p,n); (s)->p += n; }#define in_uint8s(s,n) (s)->p += n;#define out_uint8(s,v) *((s)->p++) = v;#define out_uint8p(s,v,n) { memcpy((s)->p,v,n); (s)->p += n; }#define out_uint8a(s,v,n) out_uint8p(s,v,n);#define out_uint8s(s,n) { memset((s)->p,0,n); (s)->p += n; }
#define next_be(s,v) v = ((v) << 8) + *((s)->p++);