From: Ted Lemon <source@isc.org>
Date: Tue, 1 Feb 2000 18:25:09 +0000 (+0000)
Subject: Make IP_HL and IP_HL_SET consistent.
X-Git-Tag: V3-BETA-2-PATCH-1~366
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=11515e7a8c26841c7c5cfb8b705da034cba7ab6a;p=thirdparty%2Fdhcp.git

Make IP_HL and IP_HL_SET consistent.
---

diff --git a/common/icmp.c b/common/icmp.c
index 02e2150f6..c510055ab 100644
--- a/common/icmp.c
+++ b/common/icmp.c
@@ -23,7 +23,7 @@
 
 #ifndef lint
 static char copyright[] =
-"$Id: icmp.c,v 1.19 2000/02/01 18:19:48 mellon Exp $ Copyright (c) 1997, 1998 The Internet Software Consortium.  All rights reserved.\n";
+"$Id: icmp.c,v 1.20 2000/02/01 18:25:07 mellon Exp $ Copyright (c) 1997, 1998 The Internet Software Consortium.  All rights reserved.\n";
 #endif /* not lint */
 
 #include "dhcpd.h"
@@ -180,7 +180,7 @@ isc_result_t icmp_echoreply (h)
 
 	/* Find the IP header length... */
 	ip = (struct ip *)icbuf;
-	hlen = IP_HL (ip) << 2;
+	hlen = IP_HL (ip);
 
 	/* Short packet? */
 	if (status < hlen + (sizeof *icfrom)) {
diff --git a/common/tr.c b/common/tr.c
index f9707816b..e03bc9831 100644
--- a/common/tr.c
+++ b/common/tr.c
@@ -161,7 +161,7 @@ ssize_t decode_tr_header (interface, buf, bufix, from)
          * filter code in bpf.c */
         llc = (struct trllc *)(buf + bufix + hdr_len);
         ip = (struct ip *) (llc + 1);
-        udp = (struct udphdr *) ((unsigned char*) ip + ip->ip_hl * 4);
+        udp = (struct udphdr *) ((unsigned char*) ip + IP_HL (ip));
 
         /* make sure it is a snap encoded, IP, UDP, unfragmented packet sent
          * to our port */
diff --git a/includes/netinet/ip.h b/includes/netinet/ip.h
index 4afb80d73..0a1e35840 100644
--- a/includes/netinet/ip.h
+++ b/includes/netinet/ip.h
@@ -64,10 +64,10 @@ struct ip {
 };
 
 #define IP_V(iph)	((iph)->ip_fvhl >> 4)
-#define IP_HL(iph)	((iph)->ip_fvhl & 0x0F)
+#define IP_HL(iph)	(((iph)->ip_fvhl & 0x0F) << 2)
 #define IP_V_SET(iph,x)	((iph)->ip_fvhl = ((iph)->ip_fvhl & 0x0F) | ((x) << 4))
 #define IP_HL_SET(iph,x) ((iph)->ip_fvhl = \
-			  ((iph)->ip_fvhl & 0xF0) | ((x) >> 2))
+			  ((iph)->ip_fvhl & 0xF0) | (((x) >> 2) & 0x0F))
 
 #define	IP_MAXPACKET	65535		/* maximum packet size */