repair IPv6 ESP decoder

diff --git a/print-ip6.c b/print-ip6.c
index f97ace66c72f3d1b97b92631fb6a52acf3bba9f8..7eab7e05aa30079397e35de75f0572c08cb64c35 100644 (file)
--- a/print-ip6.c
+++ b/print-ip6.c
@@ -21,7 +21,7 @@
 
 #ifndef lint
 static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-ip6.c,v 1.14 2000-10-07 05:53:11 itojun Exp $";
+    "@(#) $Header: /tcpdump/master/tcpdump/print-ip6.c,v 1.15 2000-11-09 07:43:50 itojun Exp $";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -54,7 +54,7 @@ void
 ip6_print(register const u_char *bp, register int length)
 {
        register const struct ip6_hdr *ip6;
-       register int hlen;
+       register int advance;
        register int len;
        register const u_char *cp;
        int nh;
@@ -87,17 +87,17 @@ ip6_print(register const u_char *bp, register int length)
                (void)printf("truncated-ip6 %d", length);
                return;
        }
-       hlen = sizeof(struct ip6_hdr);
+       advance = sizeof(struct ip6_hdr);
 
        len = ntohs(ip6->ip6_plen);
-       if (length < len + hlen)
+       if (length < len + advance)
                (void)printf("truncated-ip6 - %d bytes missing!",
-                       len + hlen - length);
+                       len + advance - length);
 
        cp = (const u_char *)ip6;
        nh = ip6->ip6_nxt;
        while (cp < snapend) {
-               cp += hlen;
+               cp += advance;
 
                if (cp == (u_char *)(ip6 + 1)
                 && nh != IPPROTO_TCP && nh != IPPROTO_UDP) {
@@ -107,21 +107,21 @@ ip6_print(register const u_char *bp, register int length)
 
                switch (nh) {
                case IPPROTO_HOPOPTS:
-                       hlen = hbhopt_print(cp);
+                       advance = hbhopt_print(cp);
                        nh = *cp;
                        break;
                case IPPROTO_DSTOPTS:
-                       hlen = dstopt_print(cp);
+                       advance = dstopt_print(cp);
                        nh = *cp;
                        break;
                case IPPROTO_FRAGMENT:
-                       hlen = frag6_print(cp, (const u_char *)ip6);
-                       if (snapend <= cp + hlen)
+                       advance = frag6_print(cp, (const u_char *)ip6);
+                       if (snapend <= cp + advance)
                                goto end;
                        nh = *cp;
                        break;
                case IPPROTO_ROUTING:
-                       hlen = rt6_print(cp, (const u_char *)ip6);
+                       advance = rt6_print(cp, (const u_char *)ip6);
                        nh = *cp;
                        break;
                case IPPROTO_TCP:
@@ -136,13 +136,13 @@ ip6_print(register const u_char *bp, register int length)
                        icmp6_print(cp, (const u_char *)ip6);
                        goto end;
                case IPPROTO_AH:
-                       hlen = ah_print(cp, (const u_char *)ip6);
+                       advance = ah_print(cp, (const u_char *)ip6);
                        nh = *cp;
                        break;
                case IPPROTO_ESP:
                    {
                        int enh;
-                       cp += esp_print(cp, (const u_char *)ip6, &enh);
+                       advance = esp_print(cp, (const u_char *)ip6, &enh);
                        if (enh < 0)
                                goto end;
                        nh = enh & 0xff;
@@ -154,7 +154,7 @@ ip6_print(register const u_char *bp, register int length)
                case IPPROTO_IPCOMP:
                    {
                        int enh;
-                       cp += ipcomp_print(cp, (const u_char *)ip6, &enh);
+                       advance = ipcomp_print(cp, (const u_char *)ip6, &enh);
                        if (enh < 0)
                                goto end;
                        nh = enh & 0xff;