X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/436ced3bd83f6b3a5b4a206538c56189837add59..e01c9bf76740802025c9328901b55ee4a0c49ed6:/print-ospf.c

diff --git a/print-ospf.c b/print-ospf.c
index e8aa26ce..4c09912a 100644
--- a/print-ospf.c
+++ b/print-ospf.c
@@ -21,6 +21,8 @@
  * OSPF support contributed by Jeffrey Honig (jch@mitchell.cit.cornell.edu)
  */
 
+/* \summary: Open Shortest Path First (OSPF) printer */
+
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
@@ -566,16 +568,16 @@ trunc:
 
 /* draft-ietf-ospf-mt-09 */
 static const struct tok ospf_topology_values[] = {
-    { 0, "default " },
-    { 1, "multicast " },
-    { 2, "management " },
+    { 0, "default" },
+    { 1, "multicast" },
+    { 2, "management" },
     { 0, NULL }
 };
 
 /*
  * Print all the per-topology metrics.
  */
-static void
+static int
 ospf_print_tos_metrics(netdissect_options *ndo,
                        const union un_tos *tos)
 {
@@ -588,9 +590,10 @@ ospf_print_tos_metrics(netdissect_options *ndo,
     /*
      * All but the first metric contain a valid topology id.
      */
-    while (toscount) {
-        ND_PRINT((ndo, "\n\t\ttopology %s(%u), metric %u",
-               tok2str(ospf_topology_values, "",
+    while (toscount > 0) {
+        ND_TCHECK(*tos);
+        ND_PRINT((ndo, "\n\t\ttopology %s (%u), metric %u",
+               tok2str(ospf_topology_values, "Unknown",
                        metric_count ? tos->metrics.tos_type : 0),
                metric_count ? tos->metrics.tos_type : 0,
                EXTRACT_16BITS(&tos->metrics.tos_metric)));
@@ -598,6 +601,9 @@ ospf_print_tos_metrics(netdissect_options *ndo,
         tos++;
         toscount--;
     }
+    return 0;
+trunc:
+    return 1;
 }
 
 /*
@@ -671,7 +677,8 @@ ospf_print_lsa(netdissect_options *ndo,
 				return (ls_end);
 			}
 
-			ospf_print_tos_metrics(ndo, &rlp->un_tos);
+			if (ospf_print_tos_metrics(ndo, &rlp->un_tos))
+				goto trunc;
 
 			rlp = (const struct rlalink *)((const u_char *)(rlp + 1) +
 			    ((rlp->un_tos.link.link_tos_count) * sizeof(union un_tos)));
@@ -699,11 +706,11 @@ ospf_print_lsa(netdissect_options *ndo,
 		while ((const u_char *)lp < ls_end) {
 			register uint32_t ul;
 
-			ND_TCHECK(*lp);
+			ND_TCHECK_32BITS(lp);
 			ul = EXTRACT_32BITS(lp);
                         topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS;
-			ND_PRINT((ndo, "\n\t\ttopology %s(%u) metric %d",
-                               tok2str(ospf_topology_values, "", topology),
+			ND_PRINT((ndo, "\n\t\ttopology %s (%u) metric %d",
+                               tok2str(ospf_topology_values, "Unknown", topology),
                                topology,
                                ul & SLA_MASK_METRIC));
 			++lp;
@@ -716,11 +723,11 @@ ospf_print_lsa(netdissect_options *ndo,
 		while ((const u_char *)lp < ls_end) {
 			register uint32_t ul;
 
-			ND_TCHECK(*lp);
+			ND_TCHECK_32BITS(lp);
 			ul = EXTRACT_32BITS(lp);
                         topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS;
-			ND_PRINT((ndo, "\n\t\ttopology %s(%u) metric %d",
-                               tok2str(ospf_topology_values, "", topology),
+			ND_PRINT((ndo, "\n\t\ttopology %s (%u) metric %d",
+                               tok2str(ospf_topology_values, "Unknown", topology),
                                topology,
                                ul & SLA_MASK_METRIC));
 			++lp;
@@ -741,8 +748,8 @@ ospf_print_lsa(netdissect_options *ndo,
 			ND_TCHECK(almp->asla_tosmetric);
 			ul = EXTRACT_32BITS(&almp->asla_tosmetric);
                         topology = ((ul & ASLA_MASK_TOS) >> ASLA_SHIFT_TOS);
-			ND_PRINT((ndo, "\n\t\ttopology %s(%u), type %d, metric",
-                               tok2str(ospf_topology_values, "", topology),
+			ND_PRINT((ndo, "\n\t\ttopology %s (%u), type %d, metric",
+                               tok2str(ospf_topology_values, "Unknown", topology),
                                topology,
                                (ul & ASLA_FLAG_EXTERNAL) ? 2 : 1));
 			if ((ul & ASLA_MASK_METRIC) == 0xffffff)
@@ -989,6 +996,7 @@ ospf_decode_v2(netdissect_options *ndo,
 		break;
 
 	case OSPF_TYPE_HELLO:
+		ND_TCHECK(op->ospf_hello.hello_options);
 		ND_PRINT((ndo, "\n\tOptions [%s]",
 		          bittok2str(ospf_option_values,"none",op->ospf_hello.hello_options)));