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/* |
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rdesktop: A Remote Desktop Protocol client. |
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Parsing primitives |
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Copyright (C) Matthew Chapman 1999-2000 |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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/* Parser state */ |
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typedef struct stream |
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{ |
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unsigned char *p; |
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unsigned char *end; |
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unsigned char *data; |
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unsigned int size; |
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/* Offsets of various headers */ |
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unsigned char *iso_hdr; |
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unsigned char *mcs_hdr; |
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unsigned char *sec_hdr; |
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unsigned char *rdp_hdr; |
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} *STREAM; |
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#define s_push_layer(s,h,n) { (s)->h = (s)->p; (s)->p += n; } |
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#define s_pop_layer(s,h) (s)->p = (s)->h; |
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#define s_mark_end(s) (s)->end = (s)->p; |
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#define s_check(s) ((s)->p <= (s)->end) |
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#define s_check_rem(s,n) ((s)->p + n <= (s)->end) |
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#define s_check_end(s) ((s)->p == (s)->end) |
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#if defined(L_ENDIAN) && !defined(NEED_ALIGN) |
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#define in_uint16_le(s,v) { v = *(uint16 *)((s)->p); (s)->p += 2; } |
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#define in_uint32_le(s,v) { v = *(uint32 *)((s)->p); (s)->p += 4; } |
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#define out_uint16_le(s,v) { *(uint16 *)((s)->p) = v; (s)->p += 2; } |
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#define out_uint32_le(s,v) { *(uint32 *)((s)->p) = v; (s)->p += 4; } |
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#else |
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#define in_uint16_le(s,v) { v = *((s)->p++); v += *((s)->p++) << 8; } |
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#define in_uint32_le(s,v) { in_uint16_le(s,v) \ |
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v += *((s)->p++) << 16; v += *((s)->p++) << 24; } |
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#define out_uint16_le(s,v) { *((s)->p++) = (v) & 0xff; *((s)->p++) = ((v) >> 8) & 0xff; } |
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#define out_uint32_le(s,v) { out_uint16_le(s, (v) & 0xffff); out_uint16_le(s, ((v) >> 16) & 0xffff); } |
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#endif |
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#if defined(B_ENDIAN) && !defined(NEED_ALIGN) |
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#define in_uint16_be(s,v) { v = *(uint16 *)((s)->p); (s)->p += 2; } |
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#define in_uint32_be(s,v) { v = *(uint32 *)((s)->p); (s)->p += 4; } |
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#define out_uint16_be(s,v) { *(uint16 *)((s)->p) = v; (s)->p += 2; } |
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#define out_uint32_be(s,v) { *(uint32 *)((s)->p) = v; (s)->p += 4; } |
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#define B_ENDIAN_PREFERRED |
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#define in_uint16(s,v) in_uint16_be(s,v) |
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#define in_uint32(s,v) in_uint32_be(s,v) |
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#define out_uint16(s,v) out_uint16_be(s,v) |
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#define out_uint32(s,v) out_uint32_be(s,b) |
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#else |
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#define next_be(s,v) v = ((v) << 8) + *((s)->p++); |
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#define in_uint16_be(s,v) { v = *((s)->p++); next_be(s,v); } |
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#define in_uint32_be(s,v) { in_uint16_be(s,v); next_be(s,v); next_be(s,v); } |
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#define out_uint16_be(s,v) { *((s)->p++) = ((v) >> 8) & 0xff; *((s)->p++) = (v) & 0xff; } |
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#define out_uint32_be(s,v) { out_uint16_be(s, ((v) >> 16) & 0xffff); out_uint16_be(s, (v) & 0xffff); } |
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#endif |
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#ifndef B_ENDIAN_PREFERRED |
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#define in_uint16(s,v) in_uint16_le(s,v) |
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#define in_uint32(s,v) in_uint32_le(s,v) |
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#define out_uint16(s,v) out_uint16_le(s,v) |
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#define out_uint32(s,v) out_uint32_le(s,v) |
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#endif |
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#define in_uint8(s,v) v = *((s)->p++); |
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#define in_uint8p(s,v,n) { v = (s)->p; (s)->p += n; } |
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#define in_uint8a(s,v,n) { memcpy(v,(s)->p,n); (s)->p += n; } |
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#define in_uint8s(s,n) (s)->p += n; |
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#define out_uint8(s,v) *((s)->p++) = v; |
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#define out_uint8p(s,v,n) { memcpy((s)->p,v,n); (s)->p += n; } |
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#define out_uint8a(s,v,n) out_uint8p(s,v,n); |
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#define out_uint8s(s,n) { memset((s)->p,0,n); (s)->p += n; } |
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