+ 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;
+
+ uint8_t version, pdu_version, fixed_len;
+ uint8_t pdu_type, pdu_max_area, max_area, pdu_id_length, id_length, tlv_type, tlv_len, tlen, alen, prefix_len;
+ u_int ext_is_len, ext_ip_len;
+ uint8_t mt_len;
+ uint8_t isis_subtlv_idrp;
+ const uint8_t *optr, *pptr, *tptr;
+ u_int packet_len;
+ u_short pdu_len, key_id;
+ u_int i,vendor_id, num_vals;
+ uint8_t auth_type;
+ uint8_t num_system_ids;
+ int sigcheck;
+
+ ndo->ndo_protocol = "isis";
+ packet_len=length;
+ optr = p; /* initialize the _o_riginal pointer to the packet start -
+ need it for parsing the checksum TLV and authentication
+ TLV verification */
+ isis_header = (const struct isis_common_header *)p;
+ ND_TCHECK_SIZE(isis_header);
+ if (length < ISIS_COMMON_HEADER_SIZE)
+ goto trunc;
+ 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;
+
+ if (!ndo->ndo_eflag)
+ ND_PRINT("IS-IS");
+
+ /*
+ * Sanity checking of the header.
+ */
+
+ version = GET_U_1(isis_header->version);
+ if (version != ISIS_VERSION) {
+ ND_PRINT("version %u packet not supported", version);
+ return (0);
+ }
+
+ pdu_id_length = GET_U_1(isis_header->id_length);
+ if ((pdu_id_length != SYSTEM_ID_LEN) && (pdu_id_length != 0)) {
+ ND_PRINT("system ID length of %u is not supported",
+ pdu_id_length);
+ return (0);
+ }
+
+ pdu_version = GET_U_1(isis_header->pdu_version);
+ if (pdu_version != ISIS_VERSION) {
+ ND_PRINT("version %u packet not supported", pdu_version);
+ return (0);
+ }
+
+ fixed_len = GET_U_1(isis_header->fixed_len);
+ if (length < fixed_len) {
+ ND_PRINT("fixed header length %u > packet length %u", fixed_len, length);
+ return (0);
+ }
+
+ if (fixed_len < ISIS_COMMON_HEADER_SIZE) {
+ ND_PRINT("fixed header length %u < minimum header size %u", fixed_len, (u_int)ISIS_COMMON_HEADER_SIZE);
+ return (0);
+ }
+
+ pdu_max_area = GET_U_1(isis_header->max_area);
+ switch(pdu_max_area) {
+ case 0:
+ max_area = 3; /* silly shit */
+ break;
+ case 255:
+ ND_PRINT("bad packet -- 255 areas");
+ return (0);
+ default:
+ max_area = pdu_max_area;
+ break;
+ }
+
+ switch(pdu_id_length) {
+ case 0:
+ id_length = 6; /* silly shit again */
+ break;
+ case 1: /* 1-8 are valid sys-ID lengths */
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ case 6:
+ case 7:
+ case 8:
+ id_length = pdu_id_length;
+ break;
+ case 255:
+ id_length = 0; /* entirely useless */
+ break;
+ default:
+ id_length = pdu_id_length;
+ break;
+ }
+
+ /* toss any non 6-byte sys-ID len PDUs */
+ if (id_length != 6 ) {
+ ND_PRINT("bad packet -- illegal sys-ID length (%u)", id_length);
+ return (0);
+ }
+
+ pdu_type = GET_U_1(isis_header->pdu_type);
+
+ /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT("%s%s",
+ ndo->ndo_eflag ? "" : ", ",
+ tok2str(isis_pdu_values, "unknown PDU-Type %u", pdu_type));
+ } else {
+ /* ok they seem to want to know everything - lets fully decode it */
+ ND_PRINT("%slength %u", ndo->ndo_eflag ? "" : ", ", length);
+
+ ND_PRINT("\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),
+ fixed_len,
+ version,
+ pdu_version,
+ id_length,
+ pdu_id_length,
+ max_area,
+ pdu_max_area);
+
+ if (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, 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 (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) {
+ ND_PRINT(", bogus fixed header length %u should be %zu",
+ fixed_len, ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
+ return (0);
+ }
+ ND_TCHECK_SIZE(header_iih_lan);
+ if (length < ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)
+ goto trunc;
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT(", src-id %s",
+ isis_print_id(ndo, header_iih_lan->source_id, SYSTEM_ID_LEN));
+ ND_PRINT(", lan-id %s, prio %u",
+ isis_print_id(ndo, header_iih_lan->lan_id,NODE_ID_LEN),
+ GET_U_1(header_iih_lan->priority));
+ ND_PRINT(", length %u", length);
+ return (1);
+ }
+ pdu_len=GET_BE_U_2(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;
+ }
+
+ ND_PRINT("\n\t source-id: %s, holding time: %us, Flags: [%s]",
+ isis_print_id(ndo, header_iih_lan->source_id,SYSTEM_ID_LEN),
+ GET_BE_U_2(header_iih_lan->holding_time),
+ tok2str(isis_iih_circuit_type_values,
+ "unknown circuit type 0x%02x",
+ GET_U_1(header_iih_lan->circuit_type)));
+
+ ND_PRINT("\n\t lan-id: %s, Priority: %u, PDU length: %u",
+ isis_print_id(ndo, header_iih_lan->lan_id, NODE_ID_LEN),
+ GET_U_1(header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK,
+ pdu_len);
+
+ if (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_LAN_HEADER_SIZE))
+ return (0);
+ }
+
+ INVALID_OR_DECREMENT(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 (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) {
+ ND_PRINT(", bogus fixed header length %u should be %zu",
+ fixed_len, ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
+ return (0);
+ }
+ ND_TCHECK_SIZE(header_iih_ptp);
+ if (length < ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)
+ goto trunc;
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT(", src-id %s", isis_print_id(ndo, header_iih_ptp->source_id, SYSTEM_ID_LEN));
+ ND_PRINT(", length %u", length);
+ return (1);
+ }
+ pdu_len=GET_BE_U_2(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;
+ }
+
+ ND_PRINT("\n\t source-id: %s, holding time: %us, Flags: [%s]",
+ isis_print_id(ndo, header_iih_ptp->source_id,SYSTEM_ID_LEN),
+ GET_BE_U_2(header_iih_ptp->holding_time),
+ tok2str(isis_iih_circuit_type_values,
+ "unknown circuit type 0x%02x",
+ GET_U_1(header_iih_ptp->circuit_type)));
+
+ ND_PRINT("\n\t circuit-id: 0x%02x, PDU length: %u",
+ GET_U_1(header_iih_ptp->circuit_id),
+ pdu_len);
+
+ if (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_PTP_HEADER_SIZE))
+ return (0);
+ }
+ INVALID_OR_DECREMENT(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 (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) {
+ ND_PRINT(", bogus fixed header length %u should be %zu",
+ fixed_len, ISIS_LSP_HEADER_SIZE);
+ return (0);
+ }
+ ND_TCHECK_SIZE(header_lsp);
+ if (length < ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)
+ goto trunc;
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT(", lsp-id %s, seq 0x%08x, lifetime %5us",
+ isis_print_id(ndo, header_lsp->lsp_id, LSP_ID_LEN),
+ GET_BE_U_4(header_lsp->sequence_number),
+ GET_BE_U_2(header_lsp->remaining_lifetime));
+ ND_PRINT(", length %u", length);
+ return (1);
+ }
+ pdu_len=GET_BE_U_2(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;
+ }
+
+ ND_PRINT("\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x",
+ isis_print_id(ndo, header_lsp->lsp_id, LSP_ID_LEN),
+ GET_BE_U_4(header_lsp->sequence_number),
+ GET_BE_U_2(header_lsp->remaining_lifetime),
+ GET_BE_U_2(header_lsp->checksum));
+
+ osi_print_cksum(ndo, (const uint8_t *)header_lsp->lsp_id,
+ GET_BE_U_2(header_lsp->checksum),
+ 12, length-12);
+
+ ND_PRINT(", 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)) {
+ ND_PRINT("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : "");
+ ND_PRINT("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : "");
+ ND_PRINT("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : "");
+ ND_PRINT("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : "");
+ ND_PRINT("ATT bit set, ");
+ }
+ ND_PRINT("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : "");
+ ND_PRINT("%s ]", tok2str(isis_lsp_istype_values, "Unknown(0x%x)",
+ ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock)));
+
+ if (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_LSP_HEADER_SIZE))
+ return (0);
+ }
+
+ INVALID_OR_DECREMENT(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 (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) {
+ ND_PRINT(", bogus fixed header length %u should be %zu",
+ fixed_len, ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
+ return (0);
+ }
+ ND_TCHECK_SIZE(header_csnp);
+ if (length < ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)
+ goto trunc;
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT(", src-id %s", isis_print_id(ndo, header_csnp->source_id, NODE_ID_LEN));
+ ND_PRINT(", length %u", length);
+ return (1);
+ }
+ pdu_len=GET_BE_U_2(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;
+ }
+
+ ND_PRINT("\n\t source-id: %s, PDU length: %u",
+ isis_print_id(ndo, header_csnp->source_id, NODE_ID_LEN),
+ pdu_len);
+ ND_PRINT("\n\t start lsp-id: %s",
+ isis_print_id(ndo, header_csnp->start_lsp_id, LSP_ID_LEN));
+ ND_PRINT("\n\t end lsp-id: %s",
+ isis_print_id(ndo, header_csnp->end_lsp_id, LSP_ID_LEN));
+
+ if (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_CSNP_HEADER_SIZE))
+ return (0);
+ }
+
+ INVALID_OR_DECREMENT(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 (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) {
+ ND_PRINT("- bogus fixed header length %u should be %zu",
+ fixed_len, ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
+ return (0);
+ }
+ ND_TCHECK_SIZE(header_psnp);
+ if (length < ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)
+ goto trunc;
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT(", src-id %s", isis_print_id(ndo, header_psnp->source_id, NODE_ID_LEN));
+ ND_PRINT(", length %u", length);
+ return (1);
+ }
+ pdu_len=GET_BE_U_2(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;
+ }
+
+ ND_PRINT("\n\t source-id: %s, PDU length: %u",
+ isis_print_id(ndo, header_psnp->source_id, NODE_ID_LEN),
+ pdu_len);
+
+ if (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_PSNP_HEADER_SIZE))
+ return (0);
+ }
+
+ INVALID_OR_DECREMENT(packet_len,ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
+ break;
+
+ default:
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT(", length %u", length);
+ return (1);
+ }
+ (void)print_unknown_data(ndo, pptr, "\n\t ", length);
+ return (0);
+ }
+
+ /*
+ * Now print the TLV's.
+ */
+
+ while (packet_len > 0) {
+ ND_TCHECK_2(pptr);
+ if (packet_len < 2)
+ goto trunc;
+ tlv_type = GET_U_1(pptr);
+ tlv_len = GET_U_1(pptr + 1);
+ pptr += 2;
+ packet_len -= 2;
+ tlen = tlv_len; /* copy temporary len & pointer to packet data */
+ tptr = pptr;
+
+ /* first lets see if we know the TLVs name*/
+ ND_PRINT("\n\t %s TLV #%u, length: %u",
+ tok2str(isis_tlv_values,
+ "unknown",
+ tlv_type),
+ tlv_type,
+ tlv_len);
+
+ if (packet_len < tlv_len)
+ goto trunc;
+
+ /* now check if we have a decoder otherwise do a hexdump at the end*/
+ switch (tlv_type) {
+ case ISIS_TLV_AREA_ADDR:
+ while (tlen != 0) {
+ alen = GET_U_1(tptr);
+ tptr++;
+ tlen--;
+ if (tlen < alen)
+ goto tlv_trunc;
+ ND_PRINT("\n\t Area address (length: %u): %s",
+ alen,
+ GET_ISONSAP_STRING(tptr, alen));
+ tptr += alen;
+ tlen -= alen;
+ }
+ break;
+ case ISIS_TLV_ISNEIGH:
+ while (tlen != 0) {
+ if (tlen < MAC_ADDR_LEN)
+ goto tlv_trunc;
+ ND_TCHECK_LEN(tptr, MAC_ADDR_LEN);
+ ND_PRINT("\n\t SNPA: %s", isis_print_id(ndo, tptr, MAC_ADDR_LEN));
+ tlen -= MAC_ADDR_LEN;
+ tptr += MAC_ADDR_LEN;
+ }
+ break;
+
+ case ISIS_TLV_INSTANCE_ID:
+ if (tlen < 4)
+ goto tlv_trunc;
+ num_vals = (tlen-2)/2;
+ ND_PRINT("\n\t Instance ID: %u, ITIDs(%u)%s ",
+ GET_BE_U_2(tptr), num_vals,
+ num_vals ? ":" : "");
+ tptr += 2;
+ tlen -= 2;
+ for (i=0; i < num_vals; i++) {
+ ND_PRINT("%u", GET_BE_U_2(tptr));
+ if (i < (num_vals - 1)) {
+ ND_PRINT(", ");
+ }
+ tptr += 2;
+ tlen -= 2;
+ }
+ break;
+
+ case ISIS_TLV_PADDING:
+ break;
+
+ case ISIS_TLV_MT_IS_REACH:
+ mt_len = isis_print_mtid(ndo, tptr, "\n\t ", tlen);
+ if (mt_len == 0) /* did something go wrong ? */
+ goto trunc;
+ tptr+=mt_len;
+ tlen-=mt_len;
+ while (tlen != 0) {
+ ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tlen);
+ if (ext_is_len == 0) /* did something go wrong ? */
+ goto trunc;
+ if (tlen < ext_is_len) {
+ ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_is_len);
+ nd_print_invalid(ndo);
+ break;
+ }
+ tlen-=(uint8_t)ext_is_len;
+ tptr+=(uint8_t)ext_is_len;
+ }
+ break;
+
+ case ISIS_TLV_IS_ALIAS_ID:
+ while (tlen != 0) {
+ ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tlen);
+ if (ext_is_len == 0) /* did something go wrong ? */
+ goto trunc;
+ if (tlen < ext_is_len) {
+ ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_is_len);
+ nd_print_invalid(ndo);
+ break;
+ }
+ tlen-=(uint8_t)ext_is_len;
+ tptr+=(uint8_t)ext_is_len;
+ }
+ break;
+
+ case ISIS_TLV_EXT_IS_REACH:
+ while (tlen != 0) {
+ ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tlen);
+ if (ext_is_len == 0) /* did something go wrong ? */
+ goto trunc;
+ if (tlen < ext_is_len) {
+ ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_is_len);
+ nd_print_invalid(ndo);
+ break;
+ }
+ tlen-=(uint8_t)ext_is_len;
+ tptr+=(uint8_t)ext_is_len;
+ }
+ break;
+ case ISIS_TLV_IS_REACH:
+ if (tlen < 1)
+ goto tlv_trunc;
+ ND_PRINT("\n\t %s",
+ tok2str(isis_is_reach_virtual_values,
+ "bogus virtual flag 0x%02x",
+ GET_U_1(tptr)));
+ tptr++;
+ tlen--;
+ tlv_is_reach = (const struct isis_tlv_is_reach *)tptr;
+ while (tlen != 0) {
+ if (tlen < sizeof(struct isis_tlv_is_reach))
+ goto tlv_trunc;
+ ND_TCHECK_SIZE(tlv_is_reach);
+ ND_PRINT("\n\t IS Neighbor: %s",
+ isis_print_id(ndo, tlv_is_reach->neighbor_nodeid, NODE_ID_LEN));
+ isis_print_metric_block(ndo, &tlv_is_reach->isis_metric_block);
+ tlen -= 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 (tlen != 0) {
+ if (tlen < sizeof(struct isis_tlv_es_reach))
+ goto tlv_trunc;
+ ND_TCHECK_SIZE(tlv_es_reach);
+ ND_PRINT("\n\t ES Neighbor: %s",
+ isis_print_id(ndo, tlv_es_reach->neighbor_sysid, SYSTEM_ID_LEN));
+ isis_print_metric_block(ndo, &tlv_es_reach->isis_metric_block);
+ tlen -= 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(ndo, pptr, "\n\t ", tlv_len))
+ return (1);
+ break;
+
+ case ISIS_TLV_EXTD_IP_REACH:
+ while (tlen != 0) {
+ ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET);
+ if (ext_ip_len == 0) /* did something go wrong ? */
+ goto trunc;
+ if (tlen < ext_ip_len) {
+ ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_ip_len);
+ nd_print_invalid(ndo);
+ break;
+ }
+ tlen-=(uint8_t)ext_ip_len;
+ tptr+=(uint8_t)ext_ip_len;
+ }
+ break;
+
+ case ISIS_TLV_MT_IP_REACH:
+ mt_len = isis_print_mtid(ndo, tptr, "\n\t ", tlen);
+ if (mt_len == 0) { /* did something go wrong ? */
+ goto trunc;
+ }
+ tptr+=mt_len;
+ tlen-=mt_len;
+
+ while (tlen != 0) {
+ ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET);
+ if (ext_ip_len == 0) /* did something go wrong ? */
+ goto trunc;
+ if (tlen < ext_ip_len) {
+ ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_ip_len);
+ nd_print_invalid(ndo);
+ break;
+ }
+ tlen-=(uint8_t)ext_ip_len;
+ tptr+=(uint8_t)ext_ip_len;
+ }
+ break;
+
+ case ISIS_TLV_IP6_REACH:
+ while (tlen != 0) {
+ ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6);
+ if (ext_ip_len == 0) /* did something go wrong ? */
+ goto trunc;
+ if (tlen < ext_ip_len) {
+ ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_ip_len);
+ nd_print_invalid(ndo);
+ break;
+ }
+ tlen-=(uint8_t)ext_ip_len;
+ tptr+=(uint8_t)ext_ip_len;
+ }
+ break;
+
+ case ISIS_TLV_MT_IP6_REACH:
+ mt_len = isis_print_mtid(ndo, tptr, "\n\t ", tlen);
+ if (mt_len == 0) { /* did something go wrong ? */
+ goto trunc;
+ }
+ tptr+=mt_len;
+ tlen-=mt_len;
+
+ while (tlen != 0) {
+ ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6);
+ if (ext_ip_len == 0) /* did something go wrong ? */
+ goto trunc;
+ if (tlen < ext_ip_len) {
+ ND_PRINT(" [remaining tlv length %u < %u]", tlen, ext_ip_len);
+ nd_print_invalid(ndo);
+ break;
+ }
+ tlen-=(uint8_t)ext_ip_len;
+ tptr+=(uint8_t)ext_ip_len;
+ }
+ break;
+
+ case ISIS_TLV_IP6ADDR:
+ while (tlen != 0) {
+ if (tlen < sizeof(nd_ipv6))
+ goto tlv_trunc;
+ ND_PRINT("\n\t IPv6 interface address: %s",
+ GET_IP6ADDR_STRING(tptr));
+
+ tptr += sizeof(nd_ipv6);
+ tlen -= sizeof(nd_ipv6);
+ }
+ break;
+ case ISIS_TLV_AUTH:
+ if (tlen < 1)
+ goto tlv_trunc;
+ auth_type = GET_U_1(tptr);
+ tptr++;
+ tlen--;
+
+ ND_PRINT("\n\t %s: ",
+ tok2str(isis_subtlv_auth_values,
+ "unknown Authentication type 0x%02x",
+ auth_type));
+
+ switch (auth_type) {
+ case ISIS_SUBTLV_AUTH_SIMPLE:
+ nd_printjnp(ndo, tptr, tlen);
+ break;
+ case ISIS_SUBTLV_AUTH_MD5:
+ for(i=0;i<tlen;i++) {
+ ND_PRINT("%02x", GET_U_1(tptr + i));
+ }
+ if (tlen != ISIS_SUBTLV_AUTH_MD5_LEN)
+ ND_PRINT(", (invalid subTLV) ");
+
+ sigcheck = signature_verify(ndo, optr, length, tptr,
+ isis_clear_checksum_lifetime,
+ header_lsp);
+ ND_PRINT(" (%s)", tok2str(signature_check_values, "Unknown", sigcheck));
+
+ break;
+ case ISIS_SUBTLV_AUTH_GENERIC:
+ if (tlen < 2)
+ goto tlv_trunc;
+ key_id = GET_BE_U_2(tptr);
+ ND_PRINT("%u, password: ", key_id);
+ tptr += 2;
+ tlen -= 2;
+ for(i=0;i<tlen;i++) {
+ ND_PRINT("%02x", GET_U_1(tptr + i));
+ }
+ break;
+ case ISIS_SUBTLV_AUTH_PRIVATE:
+ default:
+ if (!print_unknown_data(ndo, tptr, "\n\t\t ", tlen))
+ return(0);
+ break;
+ }
+ break;
+
+ case ISIS_TLV_PTP_ADJ:
+ tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr;
+ if(tlen>=1) {
+ ND_PRINT("\n\t Adjacency State: %s (%u)",
+ tok2str(isis_ptp_adjacency_values, "unknown", GET_U_1(tptr)),
+ GET_U_1(tptr));
+ tlen--;
+ }
+ if(tlen>sizeof(tlv_ptp_adj->extd_local_circuit_id)) {
+ ND_PRINT("\n\t Extended Local circuit-ID: 0x%08x",
+ GET_BE_U_4(tlv_ptp_adj->extd_local_circuit_id));
+ tlen-=sizeof(tlv_ptp_adj->extd_local_circuit_id);
+ }
+ if(tlen>=SYSTEM_ID_LEN) {
+ ND_TCHECK_LEN(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN);
+ ND_PRINT("\n\t Neighbor System-ID: %s",
+ isis_print_id(ndo, tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN));
+ tlen-=SYSTEM_ID_LEN;
+ }
+ if(tlen>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) {
+ ND_PRINT("\n\t Neighbor Extended Local circuit-ID: 0x%08x",
+ GET_BE_U_4(tlv_ptp_adj->neighbor_extd_local_circuit_id));
+ }
+ break;
+
+ case ISIS_TLV_PROTOCOLS:
+ ND_PRINT("\n\t NLPID(s): ");
+ while (tlen != 0) {
+ ND_PRINT("%s (0x%02x)",
+ tok2str(nlpid_values,
+ "unknown",
+ GET_U_1(tptr)),
+ GET_U_1(tptr));
+ if (tlen>1) /* further NPLIDs ? - put comma */
+ ND_PRINT(", ");
+ tptr++;
+ tlen--;
+ }
+ break;
+
+ case ISIS_TLV_MT_PORT_CAP:
+ {
+ if (tlen < 2)
+ goto tlv_trunc;
+
+ ND_PRINT("\n\t RES: %u, MTID(s): %u",
+ (GET_BE_U_2(tptr) >> 12),
+ (GET_BE_U_2(tptr) & 0x0fff));
+
+ tptr += 2;
+ tlen -= 2;
+
+ if (tlen)
+ isis_print_mt_port_cap_subtlv(ndo, tptr, tlen);
+
+ break;
+ }
+
+ case ISIS_TLV_MT_CAPABILITY:
+ if (tlen < 2)
+ goto tlv_trunc;
+
+ ND_PRINT("\n\t O: %u, RES: %u, MTID(s): %u",
+ (GET_BE_U_2(tptr) >> 15) & 0x01,
+ (GET_BE_U_2(tptr) >> 12) & 0x07,
+ GET_BE_U_2(tptr) & 0x0fff);
+
+ tptr += 2;
+ tlen -= 2;
+
+ if (tlen)
+ isis_print_mt_capability_subtlv(ndo, tptr, tlen);
+
+ break;
+
+ case ISIS_TLV_TE_ROUTER_ID:
+ if (tlen < sizeof(nd_ipv4))
+ goto tlv_trunc;
+ ND_PRINT("\n\t Traffic Engineering Router ID: %s", GET_IPADDR_STRING(pptr));
+ break;
+
+ case ISIS_TLV_IPADDR:
+ while (tlen != 0) {
+ if (tlen < sizeof(nd_ipv4))
+ goto tlv_trunc;
+ ND_PRINT("\n\t IPv4 interface address: %s", GET_IPADDR_STRING(tptr));
+ tptr += sizeof(nd_ipv4);
+ tlen -= sizeof(nd_ipv4);
+ }
+ break;
+
+ case ISIS_TLV_HOSTNAME:
+ ND_PRINT("\n\t Hostname: ");
+ nd_printjnp(ndo, tptr, tlen);
+ break;
+
+ case ISIS_TLV_SHARED_RISK_GROUP:
+ if (tlen < NODE_ID_LEN)
+ break;
+ ND_TCHECK_LEN(tptr, NODE_ID_LEN);
+ ND_PRINT("\n\t IS Neighbor: %s", isis_print_id(ndo, tptr, NODE_ID_LEN));
+ tptr+=NODE_ID_LEN;
+ tlen-=NODE_ID_LEN;
+
+ if (tlen < 1)
+ break;
+ ND_PRINT(", Flags: [%s]",
+ ISIS_MASK_TLV_SHARED_RISK_GROUP(GET_U_1(tptr)) ? "numbered" : "unnumbered");
+ tptr++;
+ tlen--;
+
+ if (tlen < sizeof(nd_ipv4))
+ break;
+ ND_PRINT("\n\t IPv4 interface address: %s", GET_IPADDR_STRING(tptr));
+ tptr+=sizeof(nd_ipv4);
+ tlen-=sizeof(nd_ipv4);
+
+ if (tlen < sizeof(nd_ipv4))
+ break;
+ ND_PRINT("\n\t IPv4 neighbor address: %s", GET_IPADDR_STRING(tptr));
+ tptr+=sizeof(nd_ipv4);
+ tlen-=sizeof(nd_ipv4);
+
+ while (tlen != 0) {
+ if (tlen < 4)
+ goto tlv_trunc;
+ ND_PRINT("\n\t Link-ID: 0x%08x", GET_BE_U_4(tptr));
+ tptr+=4;
+ tlen-=4;
+ }
+ break;
+
+ case ISIS_TLV_LSP:
+ tlv_lsp = (const struct isis_tlv_lsp *)tptr;
+ while (tlen != 0) {
+ if (tlen < sizeof(struct isis_tlv_lsp))
+ goto tlv_trunc;
+ ND_TCHECK_1(tlv_lsp->lsp_id + LSP_ID_LEN - 1);
+ ND_PRINT("\n\t lsp-id: %s",
+ isis_print_id(ndo, tlv_lsp->lsp_id, LSP_ID_LEN));
+ ND_PRINT(", seq: 0x%08x",
+ GET_BE_U_4(tlv_lsp->sequence_number));
+ ND_PRINT(", lifetime: %5ds",
+ GET_BE_U_2(tlv_lsp->remaining_lifetime));
+ ND_PRINT(", chksum: 0x%04x", GET_BE_U_2(tlv_lsp->checksum));
+ tlen-=sizeof(struct isis_tlv_lsp);
+ tlv_lsp++;
+ }
+ break;
+
+ case ISIS_TLV_CHECKSUM:
+ if (tlen < ISIS_TLV_CHECKSUM_MINLEN)
+ break;
+ ND_TCHECK_LEN(tptr, ISIS_TLV_CHECKSUM_MINLEN);
+ ND_PRINT("\n\t checksum: 0x%04x ", GET_BE_U_2(tptr));
+ /* do not attempt to verify the checksum if it is zero
+ * most likely a HMAC-MD5 TLV is also present and
+ * to avoid conflicts the checksum TLV is zeroed.
+ * see rfc3358 for details
+ */
+ osi_print_cksum(ndo, optr, GET_BE_U_2(tptr), (int)(tptr-optr),
+ length);
+ break;
+
+ case ISIS_TLV_POI:
+ if (tlen < 1)
+ goto tlv_trunc;
+ num_system_ids = GET_U_1(tptr);
+ tptr++;
+ tlen--;
+ if (num_system_ids == 0) {
+ /* Not valid */
+ ND_PRINT(" No system IDs supplied");
+ } else {
+ if (tlen < SYSTEM_ID_LEN)
+ goto tlv_trunc;
+ ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN);
+ ND_PRINT("\n\t Purge Originator System-ID: %s",
+ isis_print_id(ndo, tptr, SYSTEM_ID_LEN));
+ tptr += SYSTEM_ID_LEN;
+ tlen -= SYSTEM_ID_LEN;
+
+ if (num_system_ids > 1) {
+ if (tlen < SYSTEM_ID_LEN)
+ goto tlv_trunc;
+ ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN);
+ ND_TCHECK_LEN(tptr, 2 * SYSTEM_ID_LEN + 1);
+ ND_PRINT("\n\t Received from System-ID: %s",
+ isis_print_id(ndo, tptr, SYSTEM_ID_LEN));
+ }
+ }
+ break;
+
+ case ISIS_TLV_MT_SUPPORTED:
+ while (tlen != 0) {
+ /* length can only be a multiple of 2, otherwise there is
+ something broken -> so decode down until length is 1 */
+ if (tlen!=1) {
+ mt_len = isis_print_mtid(ndo, tptr, "\n\t ", tlen);
+ if (mt_len == 0) /* did something go wrong ? */
+ goto trunc;
+ tptr+=mt_len;
+ tlen-=mt_len;
+ } else {
+ ND_PRINT("\n\t invalid MT-ID");
+ break;
+ }
+ }
+ break;
+
+ case ISIS_TLV_RESTART_SIGNALING:
+ /* first attempt to decode the flags */
+ if (tlen < ISIS_TLV_RESTART_SIGNALING_FLAGLEN)
+ break;
+ ND_TCHECK_LEN(tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN);
+ ND_PRINT("\n\t Flags [%s]",
+ bittok2str(isis_restart_flag_values, "none", GET_U_1(tptr)));
+ tptr+=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
+ tlen-=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
+
+ /* is there anything other than the flags field? */
+ if (tlen == 0)
+ break;
+
+ if (tlen < ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN)
+ break;
+ ND_TCHECK_LEN(tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN);
+
+ ND_PRINT(", Remaining holding time %us", GET_BE_U_2(tptr));
+ tptr+=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
+ tlen-=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
+
+ /* is there an additional sysid field present ?*/
+ if (tlen == SYSTEM_ID_LEN) {
+ ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN);
+ ND_PRINT(", for %s", isis_print_id(ndo, tptr,SYSTEM_ID_LEN));
+ }
+ break;
+
+ case ISIS_TLV_IDRP_INFO:
+ if (tlen < 1)
+ break;
+ isis_subtlv_idrp = GET_U_1(tptr);
+ ND_PRINT("\n\t Inter-Domain Information Type: %s",
+ tok2str(isis_subtlv_idrp_values,
+ "Unknown (0x%02x)",
+ isis_subtlv_idrp));
+ tptr++;
+ tlen--;
+ switch (isis_subtlv_idrp) {
+ case ISIS_SUBTLV_IDRP_ASN:
+ if (tlen < 2)
+ goto tlv_trunc;
+ ND_PRINT("AS Number: %u", GET_BE_U_2(tptr));
+ break;
+ case ISIS_SUBTLV_IDRP_LOCAL:
+ case ISIS_SUBTLV_IDRP_RES:
+ default:
+ if (!print_unknown_data(ndo, tptr, "\n\t ", tlen))
+ return(0);
+ break;
+ }
+ break;
+
+ case ISIS_TLV_LSP_BUFFERSIZE:
+ if (tlen < 2)
+ break;
+ ND_PRINT("\n\t LSP Buffersize: %u", GET_BE_U_2(tptr));
+ break;
+
+ case ISIS_TLV_PART_DIS:
+ while (tlen != 0) {
+ if (tlen < SYSTEM_ID_LEN)
+ goto tlv_trunc;
+ ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN);
+ ND_PRINT("\n\t %s", isis_print_id(ndo, tptr, SYSTEM_ID_LEN));
+ tptr+=SYSTEM_ID_LEN;
+ tlen-=SYSTEM_ID_LEN;
+ }
+ break;
+
+ case ISIS_TLV_PREFIX_NEIGH:
+ if (tlen < sizeof(struct isis_metric_block))
+ break;
+ ND_TCHECK_LEN(tptr, sizeof(struct isis_metric_block));
+ ND_PRINT("\n\t Metric Block");
+ isis_print_metric_block(ndo, (const struct isis_metric_block *)tptr);
+ tptr+=sizeof(struct isis_metric_block);
+ tlen-=sizeof(struct isis_metric_block);
+
+ while (tlen != 0) {
+ prefix_len=GET_U_1(tptr); /* read out prefix length in semioctets*/
+ tptr++;
+ tlen--;
+ if (prefix_len < 2) {
+ ND_PRINT("\n\t\tAddress: prefix length %u < 2", prefix_len);
+ break;
+ }
+ if (tlen < prefix_len/2)
+ break;
+ ND_PRINT("\n\t\tAddress: %s/%u",
+ GET_ISONSAP_STRING(tptr, prefix_len / 2), prefix_len * 4);
+ tptr+=prefix_len/2;
+ tlen-=prefix_len/2;
+ }
+ break;
+
+ case ISIS_TLV_IIH_SEQNR:
+ if (tlen < 4)
+ break;
+ ND_PRINT("\n\t Sequence number: %u", GET_BE_U_4(tptr));
+ break;
+
+ case ISIS_TLV_ROUTER_CAPABILITY:
+ if (tlen < 5) {
+ ND_PRINT(" [object length %u < 5]", tlen);
+ nd_print_invalid(ndo);
+ break;
+ }
+ ND_PRINT("\n\t Router-ID %s", GET_IPADDR_STRING(tptr));
+ ND_PRINT(", Flags [%s]",
+ bittok2str(isis_tlv_router_capability_flags, "none", GET_U_1(tptr+4)));
+
+ /* Optional set of sub-TLV */
+ if (tlen > 5) {
+ isis_print_router_cap_subtlv(ndo, tptr+5, tlen-5);
+ }
+ break;
+
+ case ISIS_TLV_VENDOR_PRIVATE:
+ if (tlen < 3)
+ break;
+ vendor_id = GET_BE_U_3(tptr);
+ ND_PRINT("\n\t Vendor: %s (%u)",
+ tok2str(oui_values, "Unknown", vendor_id),
+ vendor_id);
+ tptr+=3;
+ tlen-=3;
+ if (tlen != 0) /* hexdump the rest */
+ if (!print_unknown_data(ndo, tptr, "\n\t\t", tlen))
+ return(0);
+ break;
+ /*
+ * FIXME those are the defined TLVs that lack a decoder
+ * you are welcome to contribute code ;-)
+ */
+
+ case ISIS_TLV_DECNET_PHASE4:
+ case ISIS_TLV_LUCENT_PRIVATE:
+ case ISIS_TLV_IPAUTH:
+ case ISIS_TLV_NORTEL_PRIVATE1:
+ case ISIS_TLV_NORTEL_PRIVATE2:
+
+ default:
+ if (ndo->ndo_vflag <= 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t\t", tlv_len))
+ return(0);
+ }
+ break;
+ }
+tlv_trunc:
+ /* do we want to see an additionally hexdump ? */
+ if (ndo->ndo_vflag> 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t ", tlv_len))
+ return(0);
projects / tcpdump / blobdiff