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xrdp-proprietary/common/parse.h

302 lines
7.2 KiB

/*
rdesktop: A Remote Desktop Protocol client.
Parsing primitives
Copyright (C) Matthew Chapman 1999-2002
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* modified for xrdp */
/* this is a super fast stream method, you bet */
#if defined(L_ENDIAN)
#elif defined(B_ENDIAN)
#else
#error Unknown endianness.
#endif
/* parser state */
struct stream
{
char* p;
char* end;
char* data;
int size;
/* offsets of various headers */
char* iso_hdr;
char* mcs_hdr;
char* sec_hdr;
char* rdp_hdr;
char* channel_hdr;
char* next_packet;
};
/******************************************************************************/
#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 make_stream(s) \
{ \
(s) = (struct stream*)g_malloc(sizeof(struct stream), 1); \
}
/******************************************************************************/
#define init_stream(s, v) \
{ \
if ((v) > (s)->size) \
{ \
g_free((s)->data); \
(s)->data = (char*)g_malloc((v), 0); \
(s)->size = (v); \
} \
(s)->p = (s)->data; \
(s)->end = (s)->data; \
(s)->next_packet = 0; \
}
/******************************************************************************/
#define free_stream(s) \
{ \
if ((s) != 0) \
{ \
g_free((s)->data); \
} \
g_free((s)); \
} \
/******************************************************************************/
#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 in_uint8(s, v) \
{ \
(v) = *((unsigned char*)((s)->p)); \
(s)->p++; \
}
/******************************************************************************/
#if defined(B_ENDIAN) || defined(NEED_ALIGN)
#define in_sint16_le(s, v) \
{ \
(v) = (signed short) \
( \
(*((unsigned char*)((s)->p + 0)) << 0) | \
(*((unsigned char*)((s)->p + 1)) << 8) \
); \
(s)->p += 2; \
}
#else
#define in_sint16_le(s, v) \
{ \
(v) = *((signed short*)((s)->p)); \
(s)->p += 2; \
}
#endif
/******************************************************************************/
#if defined(B_ENDIAN) || defined(NEED_ALIGN)
#define in_uint16_le(s, v) \
{ \
(v) = (unsigned short) \
( \
(*((unsigned char*)((s)->p + 0)) << 0) | \
(*((unsigned char*)((s)->p + 1)) << 8) \
); \
(s)->p += 2; \
}
#else
#define in_uint16_le(s, v) \
{ \
(v) = *((unsigned short*)((s)->p)); \
(s)->p += 2; \
}
#endif
/******************************************************************************/
#define in_uint16_be(s, v) \
{ \
(v) = *((unsigned char*)((s)->p)); \
(s)->p++; \
(v) <<= 8; \
(v) |= *((unsigned char*)((s)->p)); \
(s)->p++; \
}
/******************************************************************************/
#if defined(B_ENDIAN) || defined(NEED_ALIGN)
#define in_uint32_le(s, v) \
{ \
(v) = (unsigned int) \
( \
(*((unsigned char*)((s)->p + 0)) << 0) | \
(*((unsigned char*)((s)->p + 1)) << 8) | \
(*((unsigned char*)((s)->p + 2)) << 16) | \
(*((unsigned char*)((s)->p + 3)) << 24) \
); \
(s)->p += 4; \
}
#else
#define in_uint32_le(s, v) \
{ \
(v) = *((unsigned int*)((s)->p)); \
(s)->p += 4; \
}
#endif
/******************************************************************************/
#define in_uint32_be(s, v) \
{ \
(v) = *((unsigned char*)((s)->p)); \
(s)->p++; \
(v) <<= 8; \
(v) |= *((unsigned char*)((s)->p)); \
(s)->p++; \
(v) <<= 8; \
(v) |= *((unsigned char*)((s)->p)); \
(s)->p++; \
(v) <<= 8; \
(v) |= *((unsigned char*)((s)->p)); \
(s)->p++; \
}
/******************************************************************************/
#define out_uint8(s, v) \
{ \
*((s)->p) = (unsigned char)(v); \
(s)->p++; \
}
/******************************************************************************/
#if defined(B_ENDIAN) || defined(NEED_ALIGN)
#define out_uint16_le(s, v) \
{ \
*((s)->p) = (unsigned char)((v) >> 0); \
(s)->p++; \
*((s)->p) = (unsigned char)((v) >> 8); \
(s)->p++; \
}
#else
#define out_uint16_le(s, v) \
{ \
*((unsigned short*)((s)->p)) = (unsigned short)(v); \
(s)->p += 2; \
}
#endif
/******************************************************************************/
#define out_uint16_be(s, v) \
{ \
*((s)->p) = (unsigned char)((v) >> 8); \
(s)->p++; \
*((s)->p) = (unsigned char)((v) >> 0); \
(s)->p++; \
}
/******************************************************************************/
#if defined(B_ENDIAN) || defined(NEED_ALIGN)
#define out_uint32_le(s, v) \
{ \
*((s)->p) = (unsigned char)((v) >> 0); \
(s)->p++; \
*((s)->p) = (unsigned char)((v) >> 8); \
(s)->p++; \
*((s)->p) = (unsigned char)((v) >> 16); \
(s)->p++; \
*((s)->p) = (unsigned char)((v) >> 24); \
(s)->p++; \
}
#else
#define out_uint32_le(s, v) \
{ \
*((unsigned int*)((s)->p)) = (v); \
(s)->p += 4; \
}
#endif
/******************************************************************************/
#define out_uint32_be(s, v) \
{ \
*((s)->p) = (unsigned char)((v) >> 24); \
s->p++; \
*((s)->p) = (unsigned char)((v) >> 16); \
s->p++; \
*((s)->p) = (unsigned char)((v) >> 8); \
s->p++; \
*((s)->p) = (unsigned char)(v); \
(s)->p++; \
}
/******************************************************************************/
#define in_uint8p(s, v, n) \
{ \
(v) = (s)->p; \
(s)->p += (n); \
}
/******************************************************************************/
#define in_uint8a(s, v, n) \
{ \
g_memcpy((v), (s)->p, (n)); \
(s)->p += (n); \
}
/******************************************************************************/
#define in_uint8s(s, n) \
{ \
(s)->p += (n); \
}
/******************************************************************************/
#define out_uint8p(s, v, n) \
{ \
g_memcpy((s)->p, (v), (n)); \
(s)->p += (n); \
}
/******************************************************************************/
#define out_uint8a(s, v, n) \
{ \
out_uint8p((s), (v), (n)); \
}
/******************************************************************************/
#define out_uint8s(s, n) \
{ \
g_memset((s)->p, 0, (n)); \
(s)->p += (n); \
}