+ byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */
+
+ if (!TTEST2(*tptr, byte_length))
+ return (0);
+ memset(prefix, 0, 16); /* clear the copy buffer */
+ memcpy(prefix,tptr,byte_length); /* copy as much as is stored in the TLV */
+ tptr+=byte_length;
+ processed+=byte_length;
+
+ if (afi == IPV4)
+ printf("%sIPv4 prefix: %15s/%u",
+ ident,
+ ipaddr_string(prefix),
+ bit_length);
+#ifdef INET6
+ if (afi == IPV6)
+ printf("%sIPv6 prefix: %s/%u",
+ ident,
+ ip6addr_string(prefix),
+ bit_length);
+#endif
+
+ printf(", Distribution: %s, Metric: %u",
+ ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up",
+ metric);
+
+ if (afi == IPV4 && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
+ printf(", sub-TLVs present");
+#ifdef INET6
+ if (afi == IPV6)
+ printf(", %s%s",
+ ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal",
+ ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : "");
+#endif
+
+ if ((ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte) && afi == IPV4) ||
+ (ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) && afi == IPV6)) {
+ /* assume that one prefix can hold more
+ than one subTLV - therefore the first byte must reflect
+ the aggregate bytecount of the subTLVs for this prefix
+ */
+ if (!TTEST2(*tptr, 1))
+ return (0);
+ sublen=*(tptr++);
+ processed+=sublen+1;
+ printf(" (%u)",sublen); /* print out subTLV length */
+
+ while (sublen>0) {
+ if (!TTEST2(*tptr,2))
+ return (0);
+ subtlvtype=*(tptr++);
+ subtlvlen=*(tptr++);
+ /* prepend the ident string */
+ snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
+ if(!isis_print_ip_reach_subtlv(tptr,subtlvtype,subtlvlen,ident_buffer))
+ return(0);
+ tptr+=subtlvlen;
+ sublen-=(subtlvlen+2);
+ }
+ }
+ return (processed);
+}
+
+/*
+ * isis_print
+ * Decode IS-IS packets. Return 0 on error.
+ */
+
+static int isis_print (const u_int8_t *p, u_int length)
+{
+ const struct isis_common_header *isis_header;
+
+ const struct isis_iih_lan_header *header_iih_lan;
+ const struct isis_iih_ptp_header *header_iih_ptp;
+ const struct isis_lsp_header *header_lsp;
+ const struct isis_csnp_header *header_csnp;
+ const struct isis_psnp_header *header_psnp;
+
+ const struct isis_tlv_lsp *tlv_lsp;
+ const struct isis_tlv_ptp_adj *tlv_ptp_adj;
+ const struct isis_tlv_is_reach *tlv_is_reach;
+ const struct isis_tlv_es_reach *tlv_es_reach;
+
+ u_int8_t pdu_type, max_area, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len;
+ u_int8_t ext_is_len, ext_ip_len, mt_len;
+ const u_int8_t *optr, *pptr, *tptr;
+ u_short packet_len,pdu_len;
+ u_int i,vendor_id;
+
+ packet_len=length;
+ optr = p; /* initialize the _o_riginal pointer to the packet start -
+ need it for parsing the checksum TLV */
+ isis_header = (const struct isis_common_header *)p;
+ TCHECK(*isis_header);
+ pptr = p+(ISIS_COMMON_HEADER_SIZE);
+ header_iih_lan = (const struct isis_iih_lan_header *)pptr;
+ header_iih_ptp = (const struct isis_iih_ptp_header *)pptr;
+ header_lsp = (const struct isis_lsp_header *)pptr;
+ header_csnp = (const struct isis_csnp_header *)pptr;
+ header_psnp = (const struct isis_psnp_header *)pptr;
+
+ /*
+ * Sanity checking of the header.
+ */
+
+ if (isis_header->version != ISIS_VERSION) {
+ printf(", version %d packet not supported", isis_header->version);
+ return (0);
+ }
+
+ if ((isis_header->id_length != SYSTEM_ID_LEN) && (isis_header->id_length != 0)) {
+ printf(", system ID length of %d is not supported",
+ isis_header->id_length);
+ return (0);
+ }
+
+ if (isis_header->pdu_version != ISIS_VERSION) {
+ printf(", version %d packet not supported", isis_header->pdu_version);
+ return (0);
+ }
+
+ max_area = isis_header->max_area;
+ switch(max_area) {
+ case 0:
+ max_area = 3; /* silly shit */
+ break;
+ case 255:
+ printf(", bad packet -- 255 areas");
+ return (0);
+ default:
+ break;
+ }
+
+ id_length = isis_header->id_length;
+ switch(id_length) {
+ case 0:
+ id_length = 6; /* silly shit again */
+ break;
+ case 1: /* 1-8 are valid sys-ID lenghts */
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ case 6:
+ case 7:
+ case 8:
+ break;
+ case 255:
+ id_length = 0; /* entirely useless */
+ break;
+ default:
+ break;
+ }
+
+ /* toss any non 6-byte sys-ID len PDUs */
+ if (id_length != 6 ) {
+ printf(", bad packet -- illegal sys-ID length (%u)", id_length);
+ return (0);
+ }
+
+ pdu_type=isis_header->pdu_type;
+
+ /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/
+ if (vflag < 1) {
+ printf(", %s", tok2str(isis_pdu_values,"unknown PDU-Type %u",pdu_type));
+
+ switch (pdu_type) {
+
+ case ISIS_PDU_L1_LAN_IIH:
+ case ISIS_PDU_L2_LAN_IIH:
+ printf(", src-id %s",
+ isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN));
+ printf(", lan-id %s, prio %u",
+ isis_print_id(header_iih_lan->lan_id,NODE_ID_LEN),
+ header_iih_lan->priority);
+ break;
+ case ISIS_PDU_PTP_IIH:
+ printf(", src-id %s", isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN));
+ break;
+ case ISIS_PDU_L1_LSP:
+ case ISIS_PDU_L2_LSP:
+ printf(", lsp-id %s, seq 0x%08x, lifetime %5us",
+ isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
+ EXTRACT_32BITS(header_lsp->sequence_number),
+ EXTRACT_16BITS(header_lsp->remaining_lifetime));
+ break;
+ case ISIS_PDU_L1_CSNP:
+ case ISIS_PDU_L2_CSNP:
+ printf(", src-id %s", isis_print_id(header_csnp->source_id,SYSTEM_ID_LEN));
+ break;
+ case ISIS_PDU_L1_PSNP:
+ case ISIS_PDU_L2_PSNP:
+ printf(", src-id %s", isis_print_id(header_psnp->source_id,SYSTEM_ID_LEN));
+ break;
+
+ }
+ printf(", length %u", length);
+
+ return(1);
+ }
+
+ /* ok they seem to want to know everything - lets fully decode it */
+ printf(", length: %u",length);
+
+ printf("\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)",
+ tok2str(isis_pdu_values,
+ "unknown, type %u",
+ pdu_type),
+ isis_header->fixed_len,
+ isis_header->version,
+ isis_header->pdu_version,
+ id_length,
+ isis_header->id_length,
+ max_area,
+ isis_header->max_area);
+
+ if (vflag > 1) {
+ if(!print_unknown_data(optr,"\n\t",8)) /* provide the _o_riginal pointer */
+ return(0); /* for optionally debugging the common header */
+ }
+
+ switch (pdu_type) {
+
+ case ISIS_PDU_L1_LAN_IIH:
+ case ISIS_PDU_L2_LAN_IIH:
+ if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) {
+ printf(", bogus fixed header length %u should be %lu",
+ isis_header->fixed_len, (unsigned long)ISIS_IIH_LAN_HEADER_SIZE);
+ return (0);
+ }
+
+ pdu_len=EXTRACT_16BITS(header_iih_lan->pdu_len);
+ if (packet_len>pdu_len) {
+ packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
+ length=pdu_len;
+ }
+
+ TCHECK(*header_iih_lan);
+ printf("\n\t source-id: %s, holding time: %us, Flags: [%s]",
+ isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN),
+ EXTRACT_16BITS(header_iih_lan->holding_time),
+ tok2str(isis_iih_circuit_type_values,
+ "unknown circuit type 0x%02x",
+ header_iih_lan->circuit_type));
+
+ printf("\n\t lan-id: %s, Priority: %u, PDU length: %u",
+ isis_print_id(header_iih_lan->lan_id, NODE_ID_LEN),
+ (header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK,
+ pdu_len);
+
+ if (vflag > 1) {
+ if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_LAN_HEADER_SIZE))
+ return(0);
+ }
+
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
+ break;
+
+ case ISIS_PDU_PTP_IIH:
+ if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) {
+ printf(", bogus fixed header length %u should be %lu",
+ isis_header->fixed_len, (unsigned long)ISIS_IIH_PTP_HEADER_SIZE);
+ return (0);
+ }
+
+ pdu_len=EXTRACT_16BITS(header_iih_ptp->pdu_len);
+ if (packet_len>pdu_len) {
+ packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
+ length=pdu_len;
+ }
+
+ TCHECK(*header_iih_ptp);
+ printf("\n\t source-id: %s, holding time: %us, Flags: [%s]",
+ isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN),
+ EXTRACT_16BITS(header_iih_ptp->holding_time),
+ tok2str(isis_iih_circuit_type_values,
+ "unknown circuit type 0x%02x",
+ header_iih_ptp->circuit_type));
+
+ printf("\n\t circuit-id: 0x%02x, PDU length: %u",
+ header_iih_ptp->circuit_id,
+ pdu_len);
+
+ if (vflag > 1) {
+ if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_PTP_HEADER_SIZE))
+ return(0);
+ }
+
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
+ break;
+
+ case ISIS_PDU_L1_LSP:
+ case ISIS_PDU_L2_LSP:
+ if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) {
+ printf(", bogus fixed header length %u should be %lu",
+ isis_header->fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE);
+ return (0);
+ }
+
+ pdu_len=EXTRACT_16BITS(header_lsp->pdu_len);
+ if (packet_len>pdu_len) {
+ packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
+ length=pdu_len;
+ }
+
+ TCHECK(*header_lsp);
+ printf("\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x",
+ isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
+ EXTRACT_32BITS(header_lsp->sequence_number),
+ EXTRACT_16BITS(header_lsp->remaining_lifetime),
+ EXTRACT_16BITS(header_lsp->checksum));
+
+ /* if this is a purge do not attempt to verify the checksum */
+ if ( EXTRACT_16BITS(header_lsp->remaining_lifetime) == 0 &&
+ EXTRACT_16BITS(header_lsp->checksum) == 0)
+ printf(" (purged)");
+ else
+ /* verify the checksum -
+ * checking starts at the lsp-id field at byte position [12]
+ * hence the length needs to be reduced by 12 bytes */
+ printf(" (%s)", (osi_cksum((u_int8_t *)header_lsp->lsp_id, length-12)) ? "incorrect" : "correct");
+
+ printf(", PDU length: %u, Flags: [ %s",
+ pdu_len,
+ ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : "");
+
+ if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) {
+ printf("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : "");
+ printf("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : "");
+ printf("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : "");
+ printf("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : "");
+ printf("ATT bit set, ");
+ }
+ printf("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : "");
+ printf("%s ]", tok2str(isis_lsp_istype_values,"Unknown(0x%x)",ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock)));
+
+ if (vflag > 1) {
+ if(!print_unknown_data(pptr,"\n\t ",ISIS_LSP_HEADER_SIZE))
+ return(0);
+ }
+
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
+ break;
+
+ case ISIS_PDU_L1_CSNP:
+ case ISIS_PDU_L2_CSNP:
+ if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) {
+ printf(", bogus fixed header length %u should be %lu",
+ isis_header->fixed_len, (unsigned long)ISIS_CSNP_HEADER_SIZE);
+ return (0);
+ }
+
+ pdu_len=EXTRACT_16BITS(header_csnp->pdu_len);
+ if (packet_len>pdu_len) {
+ packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
+ length=pdu_len;
+ }
+
+ TCHECK(*header_csnp);
+ printf("\n\t source-id: %s, PDU length: %u",
+ isis_print_id(header_csnp->source_id, NODE_ID_LEN),
+ pdu_len);
+ printf("\n\t start lsp-id: %s",
+ isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN));
+ printf("\n\t end lsp-id: %s",
+ isis_print_id(header_csnp->end_lsp_id, LSP_ID_LEN));
+
+ if (vflag > 1) {
+ if(!print_unknown_data(pptr,"\n\t ",ISIS_CSNP_HEADER_SIZE))
+ return(0);
+ }
+
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
+ break;
+
+ case ISIS_PDU_L1_PSNP:
+ case ISIS_PDU_L2_PSNP:
+ if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) {
+ printf("- bogus fixed header length %u should be %lu",
+ isis_header->fixed_len, (unsigned long)ISIS_PSNP_HEADER_SIZE);
+ return (0);
+ }
+
+ pdu_len=EXTRACT_16BITS(header_psnp->pdu_len);
+ if (packet_len>pdu_len) {
+ packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
+ length=pdu_len;
+ }
+
+ TCHECK(*header_psnp);
+ printf("\n\t source-id: %s, PDU length: %u",
+ isis_print_id(header_psnp->source_id, NODE_ID_LEN),
+ pdu_len);
+
+ if (vflag > 1) {
+ if(!print_unknown_data(pptr,"\n\t ",ISIS_PSNP_HEADER_SIZE))
+ return(0);
+ }
+
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
+ break;
+
+ default:
+ if(!print_unknown_data(pptr,"\n\t ",length))
+ return(0);
+ return (0);
+ }
+
+ /*
+ * Now print the TLV's.
+ */
+
+ while (packet_len >= 2) {
+ if (pptr == snapend) {
+ return (1);
+ }
+
+ if (!TTEST2(*pptr, 2)) {
+ printf("\n\t\t packet exceeded snapshot (%ld) bytes",
+ (long)(pptr-snapend));
+ return (1);
+ }
+ tlv_type = *pptr++;
+ tlv_len = *pptr++;
+ tmp =tlv_len; /* copy temporary len & pointer to packet data */
+ tptr = pptr;
+ packet_len -= 2;
+ if (tlv_len > packet_len) {
+ break;
+ }
+
+ /* first lets see if we know the TLVs name*/
+ printf("\n\t %s TLV #%u, length: %u",
+ tok2str(isis_tlv_values,
+ "unknown",
+ tlv_type),
+ tlv_type,
+ tlv_len);
+
+ /* now check if we have a decoder otherwise do a hexdump at the end*/
+ switch (tlv_type) {
+ case ISIS_TLV_AREA_ADDR:
+ if (!TTEST2(*tptr, 1))
+ goto trunctlv;
+ alen = *tptr++;
+ while (tmp && alen < tmp) {
+ printf("\n\t Area address (length: %u): %s",
+ alen,
+ print_nsap(tptr, alen));
+ tptr += alen;
+ tmp -= alen + 1;
+ if (tmp==0) /* if this is the last area address do not attemt a boundary check */
+ break;
+ if (!TTEST2(*tptr, 1))
+ goto trunctlv;
+ alen = *tptr++;
+ }
+ break;
+ case ISIS_TLV_ISNEIGH:
+ while (tmp >= ETHER_ADDR_LEN) {
+ if (!TTEST2(*tptr, ETHER_ADDR_LEN))
+ goto trunctlv;
+ printf("\n\t SNPA: %s",isis_print_id(tptr,ETHER_ADDR_LEN));
+ tmp -= ETHER_ADDR_LEN;
+ tptr += ETHER_ADDR_LEN;
+ }
+ break;
+
+ case ISIS_TLV_ISNEIGH_VARLEN:
+ if (!TTEST2(*tptr, 1))
+ goto trunctlv;
+ lan_alen = *tptr++; /* LAN adress length */
+ tmp --;
+ printf("\n\t LAN address length %u bytes ",lan_alen);
+ while (tmp >= lan_alen) {
+ if (!TTEST2(*tptr, lan_alen))
+ goto trunctlv;
+ printf("\n\t\tIS Neighbor: %s",isis_print_id(tptr,lan_alen));
+ tmp -= lan_alen;
+ tptr +=lan_alen;
+ }
+ break;
+
+ case ISIS_TLV_PADDING:
+ break;
+
+ case ISIS_TLV_MT_IS_REACH:
+ while (tmp >= 2+NODE_ID_LEN+3+1) {
+ mt_len = isis_print_mtid(tptr, "\n\t ");
+ if (mt_len == 0) /* did something go wrong ? */
+ goto trunctlv;
+ tptr+=mt_len;
+ tmp-=mt_len;
+
+ ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type);
+ if (ext_is_len == 0) /* did something go wrong ? */
+ goto trunctlv;
+
+ tmp-=ext_is_len;
+ tptr+=ext_is_len;
+ }
+ break;
+
+ case ISIS_TLV_IS_ALIAS_ID:
+ while (tmp >= NODE_ID_LEN+1) { /* is it worth attempting a decode ? */
+ ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type);
+ if (ext_is_len == 0) /* did something go wrong ? */
+ goto trunctlv;
+ tmp-=ext_is_len;
+ tptr+=ext_is_len;
+ }
+ break;
+
+ case ISIS_TLV_EXT_IS_REACH:
+ while (tmp >= NODE_ID_LEN+3+1) { /* is it worth attempting a decode ? */
+ ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type);
+ if (ext_is_len == 0) /* did something go wrong ? */
+ goto trunctlv;
+ tmp-=ext_is_len;
+ tptr+=ext_is_len;
+ }
+ break;
+ case ISIS_TLV_IS_REACH:
+ if (!TTEST2(*tptr,1)) /* check if there is one byte left to read out the virtual flag */
+ goto trunctlv;
+ printf("\n\t %s",
+ tok2str(isis_is_reach_virtual_values,
+ "bogus virtual flag 0x%02x",
+ *tptr++));
+ tlv_is_reach = (const struct isis_tlv_is_reach *)tptr;
+ while (tmp >= sizeof(struct isis_tlv_is_reach)) {
+ if (!TTEST(*tlv_is_reach))
+ goto trunctlv;
+ printf("\n\t IS Neighbor: %s",
+ isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN));
+ isis_print_metric_block(&tlv_is_reach->isis_metric_block);
+ tmp -= sizeof(struct isis_tlv_is_reach);
+ tlv_is_reach++;
+ }
+ break;
+
+ case ISIS_TLV_ESNEIGH:
+ tlv_es_reach = (const struct isis_tlv_es_reach *)tptr;
+ while (tmp >= sizeof(struct isis_tlv_es_reach)) {
+ if (!TTEST(*tlv_es_reach))
+ goto trunctlv;
+ printf("\n\t ES Neighbor: %s",
+ isis_print_id(tlv_es_reach->neighbor_sysid,SYSTEM_ID_LEN));
+ isis_print_metric_block(&tlv_es_reach->isis_metric_block);
+ tmp -= sizeof(struct isis_tlv_es_reach);
+ tlv_es_reach++;
+ }
+ break;
+
+ /* those two TLVs share the same format */
+ case ISIS_TLV_INT_IP_REACH:
+ case ISIS_TLV_EXT_IP_REACH:
+ if (!isis_print_tlv_ip_reach(pptr, "\n\t ", tlv_len))
+ return (1);
+ break;
+
+ case ISIS_TLV_EXTD_IP_REACH:
+ while (tmp>0) {
+ ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", IPV4);
+ if (ext_ip_len == 0) /* did something go wrong ? */
+ goto trunctlv;
+ tptr+=ext_ip_len;
+ tmp-=ext_ip_len;
+ }
+ break;
+
+ case ISIS_TLV_MT_IP_REACH:
+ while (tmp>0) {
+ mt_len = isis_print_mtid(tptr, "\n\t ");
+ if (mt_len == 0) /* did something go wrong ? */
+ goto trunctlv;
+ tptr+=mt_len;
+ tmp-=mt_len;
+
+ ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", IPV4);
+ if (ext_ip_len == 0) /* did something go wrong ? */
+ goto trunctlv;
+ tptr+=ext_ip_len;
+ tmp-=ext_ip_len;
+ }
+ break;
+
+#ifdef INET6
+ case ISIS_TLV_IP6_REACH:
+ while (tmp>0) {
+ ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", IPV6);
+ if (ext_ip_len == 0) /* did something go wrong ? */
+ goto trunctlv;
+ tptr+=ext_ip_len;
+ tmp-=ext_ip_len;
+ }
+ break;
+
+ case ISIS_TLV_MT_IP6_REACH:
+ while (tmp>0) {
+ mt_len = isis_print_mtid(tptr, "\n\t ");
+ if (mt_len == 0) /* did something go wrong ? */
+ goto trunctlv;
+ tptr+=mt_len;
+ tmp-=mt_len;
+
+ ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", IPV6);
+ if (ext_ip_len == 0) /* did something go wrong ? */
+ goto trunctlv;
+ tptr+=ext_ip_len;
+ tmp-=ext_ip_len;
+ }
+ break;
+
+ case ISIS_TLV_IP6ADDR:
+ while (tmp>0) {
+ if (!TTEST2(*tptr, 16))
+ goto trunctlv;
+
+ printf("\n\t IPv6 interface address: %s",
+ ip6addr_string(tptr));
+
+ tptr += 16;
+ tmp -= 16;
+ }
+ break;
+#endif
+ case ISIS_TLV_AUTH:
+ if (!TTEST2(*tptr, 1))
+ goto trunctlv;
+
+ printf("\n\t %s: ",
+ tok2str(isis_subtlv_auth_values,
+ "unknown Authentication type 0x%02x",
+ *tptr));
+
+ switch (*tptr) {
+ case ISIS_SUBTLV_AUTH_SIMPLE:
+ for(i=1;i<tlv_len;i++) {
+ if (!TTEST2(*(tptr+i), 1))
+ goto trunctlv;
+ printf("%c",*(tptr+i));
projects / tcpdump / blobdiff