+ int i;
+
+ printf("%s0x0000: ",lf);
+ for(i=0;i<len;i++) {
+ if (!TTEST2(*(cp+i), 1))
+ goto trunctlv;
+ printf("%02x",*(cp+i));
+ if (i%2)
+ printf(" ");
+ if (i/16!=(i+1)/16) {
+ if (i<(len-1))
+ printf("%s0x%04x: ",lf,i);
+ }
+ }
+ return(1); /* everything is ok */
+
+trunctlv:
+ printf("%spacket exceeded snapshot",lf);
+ return(0);
+
+}
+
+/* print the 4-byte metric block which is common found in the old-style TLVs */
+
+static int
+isis_print_metric_block (const struct isis_metric_block *isis_metric_block)
+{
+ printf(", Default Metric: %d, %s",
+ ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_default),
+ ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal");
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_delay))
+ printf("\n\t\t\t Delay Metric: %d, %s",
+ ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_delay),
+ ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal");
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_expense))
+ printf("\n\t\t\t Expense Metric: %d, %s",
+ ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_expense),
+ ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal");
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_error))
+ printf("\n\t\t\t Error Metric: %d, %s",
+ ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_error),
+ ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal");
+
+ return(1); /* everything is ok */
+}
+
+static int
+isis_print_tlv_ip_reach (const u_char *cp, int length)
+{
+ u_int bitmasks[33] = {
+ 0x00000000,
+ 0x80000000, 0xc0000000, 0xe0000000, 0xf0000000,
+ 0xf8000000, 0xfc000000, 0xfe000000, 0xff000000,
+ 0xff800000, 0xffc00000, 0xffe00000, 0xfff00000,
+ 0xfff80000, 0xfffc0000, 0xfffe0000, 0xffff0000,
+ 0xffff8000, 0xffffc000, 0xffffe000, 0xfffff000,
+ 0xfffff800, 0xfffffc00, 0xfffffe00, 0xffffff00,
+ 0xffffff80, 0xffffffc0, 0xffffffe0, 0xfffffff0,
+ 0xfffffff8, 0xfffffffc, 0xfffffffe, 0xffffffff
+ };
+ u_int mask;
+ int prefix_len;
+ const struct isis_tlv_ip_reach *tlv_ip_reach;
+
+ tlv_ip_reach = (const struct isis_tlv_ip_reach *)cp;
+
+ while (length > 0) {
+ if (length < sizeof(*tlv_ip_reach)) {
+ printf("short IPv4 reachability (%d vs %lu)", length,
+ (unsigned long)sizeof(*tlv_ip_reach));
+ return (0);
+ }
+
+ if (!TTEST(*tlv_ip_reach))
+ return (0);
+
+ mask = EXTRACT_32BITS(tlv_ip_reach->mask);
+ prefix_len = 0;
+
+ /* lets see if we can transform the mask into a prefixlen */
+ while (prefix_len <= 33) {
+ if (bitmasks[prefix_len++] == mask) {
+ prefix_len--;
+ break;
+ }
+ }
+
+ /*
+ * 34 indicates no match -> must be a discontiguous netmask
+ * lets dump the mask, otherwise print the prefix_len
+ */
+ if (prefix_len == 34)
+ printf("\n\t\t\tIPv4 prefix: %s mask %s",
+ ipaddr_string((tlv_ip_reach->prefix)),
+ ipaddr_string((tlv_ip_reach->mask)));
+ else
+ printf("\n\t\t\tIPv4 prefix: %s/%u",
+ ipaddr_string((tlv_ip_reach->prefix)),
+ prefix_len);
+
+ printf("\n\t\t\t Default Metric: %02d, %s, Distribution: %s",
+ ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_default),
+ ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal",
+ ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up");
+
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay))
+ printf("\n\t\t\t Delay Metric: %02d, %s",
+ ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_delay),
+ ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal");
+
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_expense))
+ printf("\n\t\t\t Expense Metric: %02d, %s",
+ ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_expense),
+ ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal");
+
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_error))
+ printf("\n\t\t\t Error Metric: %02d, %s",
+ ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_error),
+ ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal");
+
+ length -= sizeof(struct isis_tlv_ip_reach);
+ tlv_ip_reach++;
+ }
+ return (1);
+}
+
+/*
+ * this is the common IP-REACH subTLV decoder it is called
+ * from various EXTD-IP REACH TLVs (135,235,236,237)
+ */
+
+static int
+isis_print_ip_reach_subtlv (const u_char *tptr,int subt,int subl,const char *lf) {
+
+ switch(subt) {
+ case SUBTLV_IP_REACH_ADMIN_TAG32:
+ if (!TTEST2(*tptr,4))
+ goto trunctlv;
+ printf("%s32-Bit Administrative tag: 0x%08x",
+ lf,
+ EXTRACT_32BITS(tptr));
+ break;
+ case SUBTLV_IP_REACH_ADMIN_TAG64:
+ if (!TTEST2(*tptr,8))
+ goto trunctlv;
+ printf("%s64-Bit Administrative tag: 0x%08x%08x",
+ lf,
+ EXTRACT_32BITS(tptr),
+ EXTRACT_32BITS(tptr+4));
+ break;
+ default:
+ printf("%sunknown subTLV, type %d, length %d",
+ lf,
+ subt,
+ subl);
+ if(!isis_print_unknown_data(tptr,"\n\t\t\t ",
+ subl))
+ return(0);
+ break;
+ }
+ return(1);
+
+trunctlv:
+ printf("%spacket exceeded snapshot",lf);
+ return(0);
+}
+
+/*
+ * this is the common IS-REACH subTLV decoder it is called
+ * from various EXTD-IS REACH TLVs (22,24,222)
+ */
+
+static int
+isis_print_is_reach_subtlv (const u_char *tptr,int subt,int subl,const char *lf) {
+
+ int i,j;
+ float bw; /* copy buffer for several subTLVs */
+
+ switch(subt) {
+ case SUBTLV_EXT_IS_REACH_ADMIN_GROUP:
+ if (!TTEST2(*tptr,4))
+ goto trunctlv;
+ printf("%sAdministrative groups: 0x%08x",
+ lf,
+ EXTRACT_32BITS(tptr));
+ break;
+ case SUBTLV_EXT_IS_REACH_LINK_LOCAL_ID:
+ if (!TTEST2(*tptr,4))
+ goto trunctlv;
+ printf("%sLink Local Identifier: 0x%08x",
+ lf,
+ EXTRACT_32BITS(tptr));
+ break;
+ case SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID:
+ if (!TTEST2(*tptr,4))
+ goto trunctlv;
+ printf("%sLink Remote Identifier: 0x%08x",
+ lf,
+ EXTRACT_32BITS(tptr));
+ break;
+ case SUBTLV_EXT_IS_REACH_MAX_LINK_BW :
+ if (!TTEST2(*tptr,4))
+ goto trunctlv;
+ j = EXTRACT_32BITS(tptr);
+ memcpy (&bw, &j, 4);
+ printf("%sMaximum link bandwidth : %.3f Mbps",
+ lf,
+ bw*8/1000000 );
+ break;
+ case SUBTLV_EXT_IS_REACH_RESERVABLE_BW :
+ if (!TTEST2(*tptr,4))
+ goto trunctlv;
+ j = EXTRACT_32BITS(tptr);
+ memcpy (&bw, &j, 4);
+ printf("%sReservable link bandwidth: %.3f Mbps",
+ lf,
+ bw*8/1000000 );
+ break;
+ case SUBTLV_EXT_IS_REACH_UNRESERVED_BW :
+ printf("%sUnreserved bandwidth:",lf);
+ for (i = 0; i < 8; i++) {
+ if (!TTEST2(*(tptr+i*4),4))
+ goto trunctlv;
+ j = EXTRACT_32BITS(tptr);
+ memcpy (&bw, &j, 4);
+ printf("%s priority level %d: %.3f Mbps",
+ lf,
+ i,
+ bw*8/1000000 );
+ }
+ break;
+ case SUBTLV_EXT_IS_REACH_TE_METRIC:
+ if (!TTEST2(*tptr,3))
+ goto trunctlv;
+ printf("%sTraffic Engineering Metric: %d",
+ lf,
+ EXTRACT_24BITS(tptr));
+ break;
+ case SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR:
+ if (!TTEST2(*tptr,4))
+ goto trunctlv;
+ printf("%sIPv4 interface address: %s",
+ lf,
+ ipaddr_string(tptr));
+ break;
+ case SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR:
+ if (!TTEST2(*tptr,4))
+ goto trunctlv;
+ printf("%sIPv4 neighbor address: %s",
+ lf,
+ ipaddr_string(tptr));
+ break;
+ case SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE:
+ if (!TTEST2(*tptr,2))
+ goto trunctlv;
+ i = 0;
+ j = (ISIS_8BIT_MASK(*tptr)); /* fetch the typecode and make sure
+ that no high-order LSBs are set */
+ printf("%sLink Protection Type: %s",
+ lf,
+ (j) ? "" : "none" );
+ /* scan through the bits until the typecode is zero */
+ while(!j) {
+ printf("%s", isis_gmpls_link_prot_values[i]);
+ j=j>>1;
+ if (j) /*any other bit set ?*/
+ printf(", ");
+ i++;
+ }
+ printf(", Priority %u", *(tptr+1));
+ break;
+ case SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR:
+ printf("%sInterface Switching Capability",lf);
+
+ if (!TTEST2(*tptr,1))
+ goto trunctlv;
+ printf("%s Interface Switching Capability:%s",
+ lf,
+ tok2str(isis_gmpls_sw_cap_values, "Unknown", *(tptr)));
+
+ if (!TTEST2(*(tptr+1),1))
+ goto trunctlv;
+ printf(", LSP Encoding: %s",
+ tok2str(isis_gmpls_lsp_enc_values, "Unknown", *(tptr+1)));
+
+ if (!TTEST2(*(tptr+2),2)) /* skip 2 res. bytes */
+ goto trunctlv;
+
+ printf("%s Max LSP Bandwidth:",lf);
+ for (i = 0; i < 8; i++) {
+ if (!TTEST2(*(tptr+(i*4)+4),4))
+ goto trunctlv;
+ j = EXTRACT_32BITS(tptr);
+ memcpy (&bw, &j, 4);
+ printf("%s priority level %d: %.3f Mbps",
+ lf,
+ i,
+ bw*8/1000000 );
+ }
+ subl-=36;
+ /* there is some optional stuff left to decode but this is as of yet
+ not specified so just lets hexdump what is left */
+ if(subl>0){
+ if(!isis_print_unknown_data(tptr,"\n\t\t\t ",
+ subl-36))
+ return(0);
+ }
+ break;
+ case 250:
+ case 251:
+ case 252:
+ case 253:
+ case 254:
+ printf("%sReserved for cisco specific extensions, type %d, length %d",
+ lf,
+ subt,
+ subl);
+ break;
+ case 255:
+ printf("%sReserved for future expansion, type %d, length %d",
+ lf,
+ subt,
+ subl);
+ break;
+ default:
+ printf("%sunknown subTLV, type %d, length %d",
+ lf,
+ subt,
+ subl);
+ if(!isis_print_unknown_data(tptr,"\n\t\t\t ",
+ subl))
+ return(0);
+ break;
+ }
+ return(1);
+
+trunctlv:
+ printf("%spacket exceeded snapshot",lf);
+ return(0);
+}
+
+
+/*
+ * isis_print
+ * Decode IS-IS packets. Return 0 on error.
+ */
+
+static int isis_print (const u_char *p, u_int length)
+{
+ const struct isis_common_header *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_char pdu_type, max_area, id_length, type, len, tmp, alen, lan_alen, prefix_len, subl, subt, tslen;
+ const u_char *optr, *pptr, *tptr;
+ u_short packet_len,pdu_len,time_remain;
+ u_int i,j,bit_length,byte_length,metric,ra,rr;
+ u_char prefix[4]; /* copy buffer for ipv4 prefixes */
+#ifdef INET6
+ u_char prefix6[16]; /* copy buffer for ipv6 prefixes */
+#endif
+ packet_len=length;
+ optr = p; /* initialize the _o_riginal pointer to the packet start -
+ need it for parsing the checksum TLV */
+ header = (const struct isis_common_header *)p;
+ TCHECK(*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 (header->nlpid != NLPID_ISIS) {
+ printf(", coding error!");
+ return (0);
+ }
+
+ if (header->version != ISIS_VERSION) {
+ printf(", version %d packet not supported", header->version);
+ return (0);
+ }
+
+ if ((header->id_length != SYSTEM_ID_LEN) && (header->id_length != 0)) {
+ printf(", system ID length of %d is not supported",
+ header->id_length);
+ return (0);
+ }
+
+ if (header->pkt_version != ISIS_VERSION) {
+ printf(", version %d packet not supported", header->pkt_version);
+ return (0);
+ }
+
+ max_area = 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 = 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:
+ printf(", bad packet -- illegal sys-ID length (%u)", id_length);
+ return (0);
+ break;
+ }
+
+ printf(", hlen: %u, v: %u, sys-id-len: %u (%u), max-area: %u (%u)",
+ header->fixed_len,
+ header->version,
+ id_length,
+ header->id_length,
+ max_area,
+ header->max_area);
+
+ pdu_type=header->pdu_type;
+
+ /* first lets see if we know the PDU name*/
+ printf(", %s",
+ tok2str(isis_pdu_values,
+ "unknown PDU, type %d",
+ pdu_type));
+
+ switch (pdu_type) {
+
+ case L1_LAN_IIH:
+ case L2_LAN_IIH:
+ if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) {
+ printf(", bogus fixed header length %u should be %lu",
+ 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\t source-id: %s, holding time: %u, %s",
+ isis_print_sysid(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\t lan-id: %s, Priority: %u, PDU length: %u",
+ isis_print_nodeid(header_iih_lan->lan_id),
+ (header_iih_lan->priority) & PRIORITY_MASK,
+ pdu_len);
+
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
+ break;
+
+ case PTP_IIH:
+ if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) {
+ printf(", bogus fixed header length %u should be %lu",
+ 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\t source-id: %s, holding time: %us, circuit-id: 0x%02x, %s, PDU length: %u",
+ isis_print_sysid(header_iih_ptp->source_id,SYSTEM_ID_LEN),
+ EXTRACT_16BITS(header_iih_ptp->holding_time),
+ header_iih_ptp->circuit_id,
+ tok2str(isis_iih_circuit_type_values,
+ "unknown circuit type 0x%02x",
+ header_iih_ptp->circuit_type),
+ pdu_len);
+
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
+ break;
+
+ case L1_LSP:
+ case L2_LSP:
+ if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) {
+ printf(", bogus fixed header length %u should be %lu",
+ 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\t lsp-id: %s, seq: 0x%08x, lifetime: %5us",
+ isis_print_lspid(header_lsp->lsp_id),
+ EXTRACT_32BITS(header_lsp->sequence_number),
+ EXTRACT_16BITS(header_lsp->remaining_lifetime));
+ /* verify the checksum -
+ * checking starts at the lsp-id field
+ * which is 12 bytes after the packet start*/
+ printf("\n\t\t chksum: 0x%04x (%s), PDU length: %u",
+ EXTRACT_16BITS(header_lsp->checksum),
+ (osi_cksum(optr+12, length-12)) ? "incorrect" : "correct",
+ pdu_len);
+
+ printf(", %s", 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)));
+
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
+ break;
+
+ case L1_CSNP:
+ case L2_CSNP:
+ if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) {
+ printf(", bogus fixed header length %u should be %lu",
+ 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\t source-id: %s, PDU length: %u",
+ isis_print_nodeid(header_csnp->source_id),
+ pdu_len);
+ printf("\n\t\t start lsp-id: %s",
+ isis_print_lspid(header_csnp->start_lsp_id));
+ printf("\n\t\t end lsp-id: %s",
+ isis_print_lspid(header_csnp->end_lsp_id));
+
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
+ break;
+
+ case L1_PSNP:
+ case L2_PSNP:
+ if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) {
+ printf("- bogus fixed header length %u should be %lu",
+ 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\t source-id: %s",
+ isis_print_nodeid(header_psnp->source_id));
+
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
+ break;
+
+ default:
+ if(!isis_print_unknown_data(pptr,"\n\t\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\t packet exceeded snapshot (%ld) bytes",
+ (long)(pptr-snapend));
+ return (1);
+ }
+ type = *pptr++;
+ len = *pptr++;
+ tmp =len; /* copy temporary len & pointer to packet data */
+ tptr = pptr;
+ packet_len -= 2;
+ if (len > packet_len) {
+ break;
+ }
+
+ /* first lets see if we know the TLVs name*/
+ printf("\n\t\t %s TLV #%u, length: %u",
+ tok2str(isis_tlv_values,
+ "unknown",
+ type),
+ type,
+ len);
+
+ /* now check if we have a decoder otherwise do a hexdump at the end*/
+ switch (type) {
+ case TLV_AREA_ADDR:
+ if (!TTEST2(*tptr, 1))
+ goto trunctlv;
+ alen = *tptr++;
+ while (tmp && alen < tmp) {
+ printf("\n\t\t\tArea address (%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 TLV_ISNEIGH:
+ while (tmp >= ETHER_ADDR_LEN) {
+ if (!TTEST2(*tptr, ETHER_ADDR_LEN))
+ goto trunctlv;
+ printf("\n\t\t\tIS Neighbor: %s",isis_print_sysid(tptr,ETHER_ADDR_LEN));
+ tmp -= ETHER_ADDR_LEN;
+ tptr += ETHER_ADDR_LEN;
+ }
+ break;
+
+ case TLV_ISNEIGH_VARLEN:
+ if (!TTEST2(*tptr, 1))
+ goto trunctlv;
+ lan_alen = *tptr++; /* LAN adress length */
+ tmp --;
+ printf("\n\t\t\tLAN address length %u bytes ",lan_alen);
+ while (tmp >= lan_alen) {
+ if (!TTEST2(*tptr, lan_alen))
+ goto trunctlv;
+ printf("\n\t\t\tIS Neighbor: %s",isis_print_sysid(tptr,lan_alen));
+ tmp -= lan_alen;
+ tptr +=lan_alen;
+ }
+ break;
+
+ case TLV_PADDING:
+ break;
+
+ case TLV_MT_IS_REACH:
+ while (tmp>0) {
+ if (!TTEST2(*tptr, 2))
+ goto trunctlv;
+ printf("\n\t\t\t%s",
+ tok2str(isis_mt_values,
+ "Reserved for IETF Consensus",
+ ISIS_MASK_MTID(EXTRACT_16BITS(tptr))));
+
+ printf(" Topology (0x%03x)",
+ ISIS_MASK_MTID(EXTRACT_16BITS(tptr)));
+ tptr+=2;
+ if (!TTEST2(*tptr, NODE_ID_LEN))
+ goto trunctlv;
+ printf("\n\t\t\t IS Neighbor: %s", isis_print_nodeid(tptr));
+ tptr+=(NODE_ID_LEN);
+ if (!TTEST2(*tptr, 3))
+ goto trunctlv;
+ printf(", Metric: %d",EXTRACT_24BITS(tptr));
+ tptr+=3;
+ if (!TTEST2(*tptr, 1))
+ goto trunctlv;
+ tslen=*(tptr++);
+ printf(", %ssub-TLVs present",tslen ? "" : "no ");
+ if (tslen) {
+ printf(" (%u)",tslen);
+ while (tslen>0) {
+ if (!TTEST2(*tptr,2))
+ goto trunctlv;
+ subt=*(tptr++);
+ subl=*(tptr++);
+ if(!isis_print_is_reach_subtlv(tptr,subt,subl,"\n\t\t\t "))
+ return(0);
+ tptr+=subl;
+ tslen-=(subl+2);
+ tmp-=(subl+2);
+ }
+ }
+ tmp-=(SYSTEM_ID_LEN+7);
+ }
+ break;
+
+ case TLV_EXT_IS_REACH:
+ while (tmp>0) {
+ if (!TTEST2(*tptr, NODE_ID_LEN))
+ goto trunctlv;
+ printf("\n\t\t\tIS Neighbor: %s", isis_print_nodeid(tptr));
+ tptr+=(NODE_ID_LEN);
+
+ if (!TTEST2(*tptr, 3))
+ goto trunctlv;
+ printf(", Metric: %d",EXTRACT_24BITS(tptr));
+ tptr+=3;
+
+ if (!TTEST2(*tptr, 1))
+ goto trunctlv;
+ tslen=*(tptr++); /* read out subTLV length */
+ printf(", %ssub-TLVs present",tslen ? "" : "no ");
+ if (tslen) {
+ printf(" (%u)",tslen);
+ while (tslen>0) {
+ if (!TTEST2(*tptr,2))
+ goto trunctlv;
+ subt=*(tptr++);
+ subl=*(tptr++);
+ if(!isis_print_is_reach_subtlv(tptr,subt,subl,"\n\t\t\t "))
+ return(0);
+ tptr+=subl;
+ tslen-=(subl+2);
+ tmp-=(subl+2);
+ }
+ }
+ tmp-=(SYSTEM_ID_LEN+5);
+ }
+ break;
+ case 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\t\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\t\tIS Neighbor: %s", isis_print_nodeid(tlv_is_reach->neighbor_nodeid));
+ isis_print_metric_block(&tlv_is_reach->isis_metric_block);
+ tmp -= sizeof(struct isis_tlv_is_reach);
+ tlv_is_reach++;
+ }
+ break;
+
+ case 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\t\tES Neighbor: %s",
+ isis_print_sysid(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 TLV_IP_REACH:
+ case TLV_IP_REACH_EXT:
+ if (!isis_print_tlv_ip_reach(pptr, len))
+ return (1);
+ break;
projects / tcpdump / blobdiff