X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/bce91cc243d98e08c6c578b53b5370c8a0ea7b0f..a9d6fee301938c5a1d2033bf8b8f09db19efca5b:/print-isoclns.c

diff --git a/print-isoclns.c b/print-isoclns.c
index fb15911c..5944286a 100644
--- a/print-isoclns.c
+++ b/print-isoclns.c
@@ -102,6 +102,7 @@ static const struct tok isis_pdu_values[] = {
 #define ISIS_TLV_AUTH                10  /* iso10589, rfc3567 */
 #define ISIS_TLV_CHECKSUM            12  /* rfc3358 */
 #define ISIS_TLV_CHECKSUM_MINLEN 2
+#define ISIS_TLV_POI                 13  /* rfc6232 */
 #define ISIS_TLV_LSP_BUFFERSIZE      14  /* iso10589 rev2 */
 #define ISIS_TLV_LSP_BUFFERSIZE_MINLEN 2
 #define ISIS_TLV_EXT_IS_REACH        22  /* draft-ietf-isis-traffic-05 */
@@ -151,6 +152,7 @@ static const struct tok isis_tlv_values[] = {
     { ISIS_TLV_LSP,                "LSP entries"},
     { ISIS_TLV_AUTH,               "Authentication"},
     { ISIS_TLV_CHECKSUM,           "Checksum"},
+    { ISIS_TLV_POI,                "Purge Originator Identifier"},
     { ISIS_TLV_LSP_BUFFERSIZE,     "LSP Buffersize"},
     { ISIS_TLV_EXT_IS_REACH,       "Extended IS Reachability"},
     { ISIS_TLV_IS_ALIAS_ID,        "IS Alias ID"},
@@ -558,8 +560,8 @@ struct isis_tlv_ptp_adj {
     uint8_t neighbor_extd_local_circuit_id[4];
 };
 
-static void osi_print_cksum(netdissect_options *, const uint8_t *pptr, uint16_t checksum,
-                            u_int checksum_offset, u_int length);
+static void osi_print_cksum(netdissect_options *, const uint8_t *pptr,
+			    uint16_t checksum, int checksum_offset, int length);
 static int clnp_print(netdissect_options *, const uint8_t *, u_int);
 static void esis_print(netdissect_options *, const uint8_t *, u_int);
 static int isis_print(netdissect_options *, const uint8_t *, u_int);
@@ -2885,6 +2887,22 @@ isis_print(netdissect_options *ndo,
             osi_print_cksum(ndo, optr, EXTRACT_16BITS(tptr), tptr-optr, length);
 	    break;
 
+	case ISIS_TLV_POI:
+	    if (tlv_len >= SYSTEM_ID_LEN + 1) {
+		if (!ND_TTEST2(*tptr, SYSTEM_ID_LEN + 1))
+		    goto trunctlv;
+		ND_PRINT((ndo, "\n\t      Purge Originator System-ID: %s",
+		       isis_print_id(tptr + 1, SYSTEM_ID_LEN)));
+	    }
+
+	    if (tlv_len == 2 * SYSTEM_ID_LEN + 1) {
+		if (!ND_TTEST2(*tptr, 2 * SYSTEM_ID_LEN + 1))
+		    goto trunctlv;
+		ND_PRINT((ndo, "\n\t      Received from System-ID: %s",
+		       isis_print_id(tptr + SYSTEM_ID_LEN + 1, SYSTEM_ID_LEN)));
+	    }
+	    break;
+
 	case ISIS_TLV_MT_SUPPORTED:
             if (tmp < ISIS_TLV_MT_SUPPORTED_MINLEN)
                 break;
@@ -3074,9 +3092,8 @@ isis_print(netdissect_options *ndo,
 }
 
 static void
-osi_print_cksum(netdissect_options *ndo,
-                const uint8_t *pptr, uint16_t checksum,
-                    u_int checksum_offset, u_int length)
+osi_print_cksum(netdissect_options *ndo, const uint8_t *pptr,
+	        uint16_t checksum, int checksum_offset, int length)
 {
         uint16_t calculated_checksum;
 
@@ -3086,6 +3103,8 @@ osi_print_cksum(netdissect_options *ndo,
          * or the base pointer is not sane
          */
         if (!checksum
+            || length < 0
+            || checksum_offset < 0
             || length > ndo->ndo_snaplen
             || checksum_offset > ndo->ndo_snaplen
             || checksum_offset > length) {