X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/3d932490b826facb568937a1290910a1265267f5..98fddc3bb425b51e164d187b459c0514ac6f8a9a:/print-ip6opts.c

diff --git a/print-ip6opts.c b/print-ip6opts.c
index f0349a0f..2121b460 100644
--- a/print-ip6opts.c
+++ b/print-ip6opts.c
@@ -32,8 +32,8 @@
 #endif
 
 #ifndef lint
-static const char rcsid[] =
-     "@(#) $Header: /tcpdump/master/tcpdump/print-ip6opts.c,v 1.12 2002-08-01 08:53:11 risso Exp $";
+static const char rcsid[] _U_ =
+     "@(#) $Header: /tcpdump/master/tcpdump/print-ip6opts.c,v 1.18 2005-04-20 22:18:50 guy Exp $";
 #endif
 
 #ifdef INET6
@@ -45,6 +45,7 @@ static const char rcsid[] =
 
 #include "interface.h"
 #include "addrtoname.h"
+#include "extract.h"
 
 /* items outside of rfc2292bis */
 #ifndef IP6OPT_MINLEN
@@ -103,7 +104,7 @@ ip6_sopt_print(const u_char *bp, int len)
 		printf(", ui: trunc");
 		goto trunc;
 	    }
-            printf(", ui: 0x%04x ", ntohs(*(u_int16_t *)&bp[i + 2]));
+            printf(", ui: 0x%04x ", EXTRACT_16BITS(&bp[i + 2]));
 	    break;
         case IP6SOPT_ALTCOA:
              if (len - i < IP6SOPT_ALTCOA_MINLEN) {
@@ -117,8 +118,7 @@ ip6_sopt_print(const u_char *bp, int len)
 		printf(", auth: trunc");
 		goto trunc;
 	    }
-            printf(", auth spi: 0x%08x",
-		   (u_int32_t)ntohl(*(u_int32_t *)&bp[i + 2]));
+            printf(", auth spi: 0x%08x", EXTRACT_32BITS(&bp[i + 2]));
 	    break;
 	default:
 	    if (len - i < IP6OPT_MINLEN) {
@@ -139,8 +139,10 @@ void
 ip6_opt_print(const u_char *bp, int len)
 {
     int i;
-    int optlen;
+    int optlen = 0;
 
+    if (len == 0)
+        return;
     for (i = 0; i < len; i += optlen) {
 	if (bp[i] == IP6OPT_PAD1)
 	    optlen = 1;
@@ -173,7 +175,7 @@ ip6_opt_print(const u_char *bp, int len)
 		printf("(rtalert: invalid len %d)", bp[i + 1]);
 		goto trunc;
 	    }
-	    printf("(rtalert: 0x%04x) ", ntohs(*(u_int16_t *)&bp[i + 2]));
+	    printf("(rtalert: 0x%04x) ", EXTRACT_16BITS(&bp[i + 2]));
 	    break;
 	case IP6OPT_JUMBO:
 	    if (len - i < IP6OPT_JUMBO_LEN) {
@@ -184,7 +186,7 @@ ip6_opt_print(const u_char *bp, int len)
 		printf("(jumbo: invalid len %d)", bp[i + 1]);
 		goto trunc;
 	    }
-	    printf("(jumbo: %u) ", (u_int32_t)ntohl(*(u_int32_t *)&bp[i + 2]));
+	    printf("(jumbo: %u) ", EXTRACT_32BITS(&bp[i + 2]));
 	    break;
         case IP6OPT_HOME_ADDRESS:
 	    if (len - i < IP6OPT_HOMEADDR_MINLEN) {
@@ -223,8 +225,7 @@ ip6_opt_print(const u_char *bp, int len)
 	    if ((bp[i + 2] & 0x0f) || bp[i + 3] || bp[i + 4])
 		    printf("res");
 	    printf(", sequence: %u", bp[i + 5]);
-	    printf(", lifetime: %u",
-		(u_int32_t)ntohl(*(u_int32_t *)&bp[i + 6]));
+	    printf(", lifetime: %u", EXTRACT_32BITS(&bp[i + 6]));
 
 	    if (bp[i + 1] > IP6OPT_BU_MINLEN - 2) {
 		ip6_sopt_print(&bp[i + IP6OPT_BU_MINLEN],
@@ -246,10 +247,8 @@ ip6_opt_print(const u_char *bp, int len)
 	    if (bp[i + 3])
 		    printf("res");
 	    printf(", sequence: %u", bp[i + 4]);
-	    printf(", lifetime: %u",
-		(u_int32_t)ntohl(*(u_int32_t *)&bp[i + 5]));
-	    printf(", refresh: %u",
-		(u_int32_t)ntohl(*(u_int32_t *)&bp[i + 9]));
+	    printf(", lifetime: %u", EXTRACT_32BITS(&bp[i + 5]));
+	    printf(", refresh: %u", EXTRACT_32BITS(&bp[i + 9]));
 
 	    if (bp[i + 1] > IP6OPT_BA_MINLEN - 2) {
 		ip6_sopt_print(&bp[i + IP6OPT_BA_MINLEN],
@@ -274,10 +273,11 @@ ip6_opt_print(const u_char *bp, int len)
 		printf("(type %d: trunc)", bp[i]);
 		goto trunc;
 	    }
-	    printf("(opt_type 0x%02x: len=%d) ", bp[i], bp[i + 1]);
+	    printf("(opt_type 0x%02x: len=%d)", bp[i], bp[i + 1]);
 	    break;
 	}
     }
+    printf(" ");
 
 #if 0
 end:
@@ -292,11 +292,8 @@ int
 hbhopt_print(register const u_char *bp)
 {
     const struct ip6_hbh *dp = (struct ip6_hbh *)bp;
-    register const u_char *ep;
     int hbhlen = 0;
 
-    /* 'ep' points to the end of available data. */
-    ep = snapend;
     TCHECK(dp->ip6h_len);
     hbhlen = (int)((dp->ip6h_len + 1) << 3);
     TCHECK2(*dp, hbhlen);
@@ -308,18 +305,15 @@ hbhopt_print(register const u_char *bp)
 
   trunc:
     fputs("[|HBH]", stdout);
-    return(hbhlen);
+    return(-1);
 }
 
 int
 dstopt_print(register const u_char *bp)
 {
     const struct ip6_dest *dp = (struct ip6_dest *)bp;
-    register const u_char *ep;
     int dstoptlen = 0;
 
-    /* 'ep' points to the end of available data. */
-    ep = snapend;
     TCHECK(dp->ip6d_len);
     dstoptlen = (int)((dp->ip6d_len + 1) << 3);
     TCHECK2(*dp, dstoptlen);
@@ -333,6 +327,6 @@ dstopt_print(register const u_char *bp)
 
   trunc:
     fputs("[|DSTOPT]", stdout);
-    return(dstoptlen);
+    return(-1);
 }
 #endif /* INET6 */