diff options
author | mcr <mcr> | 1999-10-07 23:47:09 +0000 |
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committer | mcr <mcr> | 1999-10-07 23:47:09 +0000 |
commit | f555c163f90c9de17ebcef8313f86404c5174ca9 (patch) | |
tree | d039217784b67ee5dd91bc7a5bbc480d91c04356 /extract.h | |
download | tcpdump-f555c163f90c9de17ebcef8313f86404c5174ca9.tar.gz |
Initial revision
Diffstat (limited to 'extract.h')
-rw-r--r-- | extract.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/extract.h b/extract.h new file mode 100644 index 00000000..a58c73b0 --- /dev/null +++ b/extract.h @@ -0,0 +1,57 @@ +/* + * Copyright (c) 1992, 1993, 1994, 1995, 1996 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that: (1) source code distributions + * retain the above copyright notice and this paragraph in its entirety, (2) + * distributions including binary code include the above copyright notice and + * this paragraph in its entirety in the documentation or other materials + * provided with the distribution, and (3) all advertising materials mentioning + * features or use of this software display the following acknowledgement: + * ``This product includes software developed by the University of California, + * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of + * the University nor the names of its contributors may be used to endorse + * or promote products derived from this software without specific prior + * written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * @(#) $Header: /tcpdump/master/tcpdump/extract.h,v 1.15 1999-10-07 23:47:10 mcr Exp $ (LBL) + */ + +/* Network to host order macros */ + +#ifdef LBL_ALIGN +#define EXTRACT_16BITS(p) \ + ((u_short)*((u_char *)(p) + 0) << 8 | \ + (u_short)*((u_char *)(p) + 1)) +#define EXTRACT_32BITS(p) \ + ((u_int32_t)*((u_char *)(p) + 0) << 24 | \ + (u_int32_t)*((u_char *)(p) + 1) << 16 | \ + (u_int32_t)*((u_char *)(p) + 2) << 8 | \ + (u_int32_t)*((u_char *)(p) + 3)) +#else +#define EXTRACT_16BITS(p) \ + ((u_short)ntohs(*(u_short *)(p))) +#define EXTRACT_32BITS(p) \ + ((u_int32_t)ntohl(*(u_int32_t *)(p))) +#endif + +#define EXTRACT_24BITS(p) \ + ((u_int32_t)*((u_char *)(p) + 0) << 16 | \ + (u_int32_t)*((u_char *)(p) + 1) << 8 | \ + (u_int32_t)*((u_char *)(p) + 2)) + +/* Little endian protocol host order macros */ + +#define EXTRACT_LE_8BITS(p) (*(p)) +#define EXTRACT_LE_16BITS(p) \ + ((u_short)*((u_char *)(p) + 1) << 8 | \ + (u_short)*((u_char *)(p) + 0)) +#define EXTRACT_LE_32BITS(p) \ + ((u_int32_t)*((u_char *)(p) + 3) << 24 | \ + (u_int32_t)*((u_char *)(p) + 2) << 16 | \ + (u_int32_t)*((u_char *)(p) + 1) << 8 | \ + (u_int32_t)*((u_char *)(p) + 0)) |