X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/ae1c61d25e54be35c0cc1836fbfd04918e929b4f..fb8b947488c7f22b518de1df1a91e663dc7ab33c:/ip.h

diff --git a/ip.h b/ip.h
index adba2e6c..eba63668 100644
--- a/ip.h
+++ b/ip.h
@@ -1,4 +1,4 @@
-/* @(#) $Header: /tcpdump/master/tcpdump/ip.h,v 1.2 2000-09-24 07:40:45 guy Exp $ (LBL) */
+/* @(#) $Header: /tcpdump/master/tcpdump/ip.h,v 1.10 2002-12-11 07:13:53 guy Exp $ (LBL) */
 /*
  * Copyright (c) 1982, 1986, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -34,29 +34,6 @@
  *	@(#)ip.h	8.2 (Berkeley) 6/1/94
  */
 
-#ifndef BYTE_ORDER
-#define	LITTLE_ENDIAN	1234	/* least-significant byte first (vax, pc) */
-#define	BIG_ENDIAN	4321	/* most-significant byte first (IBM, net) */
-#define	PDP_ENDIAN	3412	/* LSB first in word, MSW first in long (pdp)*/
-
-#ifdef WORDS_BIGENDIAN
-#define BYTE_ORDER	BIG_ENDIAN
-#else
-#define BYTE_ORDER	LITTLE_ENDIAN
-#endif /* WORDS_BIGENDIAN */
-#endif /* BYTE_ORDER */
-
-#if !defined(BYTE_ORDER) || \
-    (BYTE_ORDER != BIG_ENDIAN && BYTE_ORDER != LITTLE_ENDIAN && \
-    BYTE_ORDER != PDP_ENDIAN)
-	/* you must determine what the correct bit order is for
-	 * your compiler - the next line is an intentional error
-	 * which will force your compiles to bomb until you fix
-	 * the above macros.
-	 */
-  #error "Undefined or invalid BYTE_ORDER";
-#endif
-
 /*
  * Definitions for internet protocol version 4.
  * Per RFC 791, September 1981.
@@ -71,24 +48,19 @@
  * against negative integers quite easily, and fail in subtle ways.
  */
 struct ip {
-#if BYTE_ORDER == LITTLE_ENDIAN 
-	u_char	ip_hl:4,		/* header length */
-		ip_v:4;			/* version */
-#endif
-#if BYTE_ORDER == BIG_ENDIAN 
-	u_char	ip_v:4,			/* version */
-		ip_hl:4;		/* header length */
-#endif
-	u_char	ip_tos;			/* type of service */
-	short	ip_len;			/* total length */
-	u_short	ip_id;			/* identification */
-	short	ip_off;			/* fragment offset field */
+	u_int8_t	ip_vhl;		/* header length, version */
+#define IP_V(ip)	(((ip)->ip_vhl & 0xf0) >> 4)
+#define IP_HL(ip)	((ip)->ip_vhl & 0x0f)
+	u_int8_t	ip_tos;		/* type of service */
+	u_int16_t	ip_len;		/* total length */
+	u_int16_t	ip_id;		/* identification */
+	u_int16_t	ip_off;		/* fragment offset field */
 #define	IP_DF 0x4000			/* dont fragment flag */
 #define	IP_MF 0x2000			/* more fragments flag */
 #define	IP_OFFMASK 0x1fff		/* mask for fragmenting bits */
-	u_char	ip_ttl;			/* time to live */
-	u_char	ip_p;			/* protocol */
-	u_short	ip_sum;			/* checksum */
+	u_int8_t	ip_ttl;		/* time to live */
+	u_int8_t	ip_p;		/* protocol */
+	u_int16_t	ip_sum;		/* checksum */
 	struct	in_addr ip_src,ip_dst;	/* source and dest address */
 };
 
@@ -147,22 +119,17 @@ struct ip {
  * Time stamp option structure.
  */
 struct	ip_timestamp {
-	u_char	ipt_code;		/* IPOPT_TS */
-	u_char	ipt_len;		/* size of structure (variable) */
-	u_char	ipt_ptr;		/* index of current entry */
-#if BYTE_ORDER == LITTLE_ENDIAN 
-	u_char	ipt_flg:4,		/* flags, see below */
-		ipt_oflw:4;		/* overflow counter */
-#endif
-#if BYTE_ORDER == BIG_ENDIAN 
-	u_char	ipt_oflw:4,		/* overflow counter */
-		ipt_flg:4;		/* flags, see below */
-#endif
+	u_int8_t	ipt_code;	/* IPOPT_TS */
+	u_int8_t	ipt_len;	/* size of structure (variable) */
+	u_int8_t	ipt_ptr;	/* index of current entry */
+	u_int8_t	ipt_oflwflg;	/* flags, overflow counter */
+#define IPTS_OFLW(ip)	(((ipt)->ipt_oflwflg & 0xf0) >> 4)
+#define IPTS_FLG(ip)	((ipt)->ipt_oflwflg & 0x0f)
 	union ipt_timestamp {
-		n_long	ipt_time[1];
+		u_int32_t ipt_time[1];
 		struct	ipt_ta {
 			struct in_addr ipt_addr;
-			n_long ipt_time;
+			u_int32_t ipt_time;
 		} ipt_ta[1];
 	} ipt_timestamp;
 };
@@ -190,3 +157,6 @@ struct	ip_timestamp {
 #define	IPTTLDEC	1		/* subtracted when forwarding */
 
 #define	IP_MSS		576		/* default maximum segment size */
+
+/* in print-ip.c */
+extern u_int32_t ip_finddst(const struct ip *);