+ int i;
+
+ ND_PRINT((ndo, "ID: %d, Name: ", mcid->format_id));
+
+ for(i=0; i<32; i++)
+ {
+ ND_PRINT((ndo, "%c", mcid->name[i]));
+ if(mcid->name[i] == '\0')
+ break;
+ }
+
+ ND_PRINT((ndo, "\n\t Lvl: %d", EXTRACT_16BITS(mcid->revision_lvl)));
+
+ ND_PRINT((ndo, ", Digest: "));
+
+ for(i=0;i<16;i++)
+ ND_PRINT((ndo, "%.2x ", mcid->digest[i]));
+}
+
+static int
+isis_print_mt_port_cap_subtlv(netdissect_options *ndo,
+ const uint8_t *tptr, int len)
+{
+ int stlv_type, stlv_len;
+ const struct isis_subtlv_spb_mcid *subtlv_spb_mcid;
+ int i;
+
+ while (len > 0)
+ {
+ stlv_type = *(tptr++);
+ stlv_len = *(tptr++);
+
+ /* first lets see if we know the subTLVs name*/
+ ND_PRINT((ndo, "\n\t %s subTLV #%u, length: %u",
+ tok2str(isis_mt_port_cap_subtlv_values, "unknown", stlv_type),
+ stlv_type,
+ stlv_len));
+
+ /*len -= TLV_TYPE_LEN_OFFSET;*/
+ len = len -2;
+
+ switch (stlv_type)
+ {
+ case ISIS_SUBTLV_SPB_MCID:
+ {
+ if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_MCID_MIN_LEN))
+ goto trunctlv;
+
+ subtlv_spb_mcid = (struct isis_subtlv_spb_mcid *)tptr;
+
+ ND_PRINT((ndo, "\n\t MCID: "));
+ isis_print_mcid(ndo, &(subtlv_spb_mcid->mcid));
+
+ /*tptr += SPB_MCID_MIN_LEN;
+ len -= SPB_MCID_MIN_LEN; */
+
+ ND_PRINT((ndo, "\n\t AUX-MCID: "));
+ isis_print_mcid(ndo, &(subtlv_spb_mcid->aux_mcid));
+
+ /*tptr += SPB_MCID_MIN_LEN;
+ len -= SPB_MCID_MIN_LEN; */
+ tptr = tptr + sizeof(struct isis_subtlv_spb_mcid);
+ len = len - sizeof(struct isis_subtlv_spb_mcid);
+
+ break;
+ }
+
+ case ISIS_SUBTLV_SPB_DIGEST:
+ {
+ if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_DIGEST_MIN_LEN))
+ goto trunctlv;
+
+ ND_PRINT((ndo, "\n\t RES: %d V: %d A: %d D: %d",
+ (*(tptr) >> 5), (((*tptr)>> 4) & 0x01),
+ ((*(tptr) >> 2) & 0x03), ((*tptr) & 0x03)));
+
+ tptr++;
+
+ ND_PRINT((ndo, "\n\t Digest: "));
+
+ for(i=1;i<=8; i++)
+ {
+ ND_PRINT((ndo, "%08x ", EXTRACT_32BITS(tptr)));
+ if (i%4 == 0 && i != 8)
+ ND_PRINT((ndo, "\n\t "));
+ tptr = tptr + 4;
+ }
+
+ len = len - ISIS_SUBTLV_SPB_DIGEST_MIN_LEN;
+
+ break;
+ }
+
+ case ISIS_SUBTLV_SPB_BVID:
+ {
+ if (!ND_TTEST2(*(tptr), stlv_len))
+ goto trunctlv;
+
+ while (len)
+ {
+ if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_BVID_MIN_LEN))
+ goto trunctlv;
+
+ ND_PRINT((ndo, "\n\t ECT: %08x",
+ EXTRACT_32BITS(tptr)));
+
+ tptr = tptr+4;
+
+ ND_PRINT((ndo, " BVID: %d, U:%01x M:%01x ",
+ (EXTRACT_16BITS (tptr) >> 4) ,
+ (EXTRACT_16BITS (tptr) >> 3) & 0x01,
+ (EXTRACT_16BITS (tptr) >> 2) & 0x01));
+
+ tptr = tptr + 2;
+ len = len - ISIS_SUBTLV_SPB_BVID_MIN_LEN;
+ }
+
+ break;
+ }
+
+ default:
+ break;
+ }
+ }
+
+ return 0;
+
+ trunctlv:
+ ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
+ return(1);
+}
+
+static int
+isis_print_mt_capability_subtlv(netdissect_options *ndo,
+ const uint8_t *tptr, int len)
+{
+ int stlv_type, stlv_len, tmp;
+
+ while (len > 0)
+ {
+ stlv_type = *(tptr++);
+ stlv_len = *(tptr++);
+
+ /* first lets see if we know the subTLVs name*/
+ ND_PRINT((ndo, "\n\t %s subTLV #%u, length: %u",
+ tok2str(isis_mt_capability_subtlv_values, "unknown", stlv_type),
+ stlv_type,
+ stlv_len));
+
+ len = len - 2;
+
+ switch (stlv_type)
+ {
+ case ISIS_SUBTLV_SPB_INSTANCE:
+
+ if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN))
+ goto trunctlv;
+
+ ND_PRINT((ndo, "\n\t CIST Root-ID: %08x", EXTRACT_32BITS(tptr)));
+ tptr = tptr+4;
+ ND_PRINT((ndo, " %08x", EXTRACT_32BITS(tptr)));
+ tptr = tptr+4;
+ ND_PRINT((ndo, ", Path Cost: %08x", EXTRACT_32BITS(tptr)));
+ tptr = tptr+4;
+ ND_PRINT((ndo, ", Prio: %d", EXTRACT_16BITS(tptr)));
+ tptr = tptr + 2;
+ ND_PRINT((ndo, "\n\t RES: %d",
+ EXTRACT_16BITS(tptr) >> 5));
+ ND_PRINT((ndo, ", V: %d",
+ (EXTRACT_16BITS(tptr) >> 4) & 0x0001));
+ ND_PRINT((ndo, ", SPSource-ID: %d",
+ (EXTRACT_32BITS(tptr) & 0x000fffff)));
+ tptr = tptr+4;
+ ND_PRINT((ndo, ", No of Trees: %x", *(tptr)));
+
+ tmp = *(tptr++);
+
+ len = len - ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN;
+
+ while (tmp)
+ {
+ if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN))
+ goto trunctlv;
+
+ ND_PRINT((ndo, "\n\t U:%d, M:%d, A:%d, RES:%d",
+ *(tptr) >> 7, (*(tptr) >> 6) & 0x01,
+ (*(tptr) >> 5) & 0x01, (*(tptr) & 0x1f)));
+
+ tptr++;
+
+ ND_PRINT((ndo, ", ECT: %08x", EXTRACT_32BITS(tptr)));
+
+ tptr = tptr + 4;
+
+ ND_PRINT((ndo, ", BVID: %d, SPVID: %d",
+ (EXTRACT_24BITS(tptr) >> 12) & 0x000fff,
+ EXTRACT_24BITS(tptr) & 0x000fff));
+
+ tptr = tptr + 3;
+ len = len - ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN;
+ tmp--;
+ }
+
+ break;
+
+ case ISIS_SUBTLV_SPBM_SI:
+
+ if (!ND_TTEST2(*(tptr), 6))
+ goto trunctlv;
+
+ ND_PRINT((ndo, "\n\t BMAC: %08x", EXTRACT_32BITS(tptr)));
+ tptr = tptr+4;
+ ND_PRINT((ndo, "%04x", EXTRACT_16BITS(tptr)));
+ tptr = tptr+2;
+
+ ND_PRINT((ndo, ", RES: %d, VID: %d", EXTRACT_16BITS(tptr) >> 12,
+ (EXTRACT_16BITS(tptr)) & 0x0fff));
+
+ tptr = tptr+2;
+ len = len - 8;
+ stlv_len = stlv_len - 8;
+
+ while (stlv_len)
+ {
+ ND_PRINT((ndo, "\n\t T: %d, R: %d, RES: %d, ISID: %d",
+ (EXTRACT_32BITS(tptr) >> 31),
+ (EXTRACT_32BITS(tptr) >> 30) & 0x01,
+ (EXTRACT_32BITS(tptr) >> 24) & 0x03f,
+ (EXTRACT_32BITS(tptr)) & 0x0ffffff));
+
+ tptr = tptr + 4;
+ len = len - 4;
+ stlv_len = stlv_len - 4;
+ }
+
+ break;
+
+ default:
+ break;
+ }
+ }
+ return 0;
+
+ trunctlv:
+ ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
+ return(1);
+}
+
+/* shared routine for printing system, node and lsp-ids */
+static char *
+isis_print_id(const uint8_t *cp, int id_len)
+{
+ int i;
+ static char id[sizeof("xxxx.xxxx.xxxx.yy-zz")];
+ char *pos = id;
+
+ for (i = 1; i <= SYSTEM_ID_LEN; i++) {
+ snprintf(pos, sizeof(id) - (pos - id), "%02x", *cp++);
+ pos += strlen(pos);
+ if (i == 2 || i == 4)
+ *pos++ = '.';
+ }
+ if (id_len >= NODE_ID_LEN) {
+ snprintf(pos, sizeof(id) - (pos - id), ".%02x", *cp++);
+ pos += strlen(pos);
+ }
+ if (id_len == LSP_ID_LEN)
+ snprintf(pos, sizeof(id) - (pos - id), "-%02x", *cp);
+ return (id);
+}
+
+/* print the 4-byte metric block which is common found in the old-style TLVs */
+static int
+isis_print_metric_block(netdissect_options *ndo,
+ const struct isis_metric_block *isis_metric_block)
+{
+ ND_PRINT((ndo, ", 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))
+ ND_PRINT((ndo, "\n\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))
+ ND_PRINT((ndo, "\n\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))
+ ND_PRINT((ndo, "\n\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(netdissect_options *ndo,
+ const uint8_t *cp, const char *ident, int length)
+{
+ 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 ((size_t)length < sizeof(*tlv_ip_reach)) {
+ ND_PRINT((ndo, "short IPv4 Reachability (%d vs %lu)",
+ length,
+ (unsigned long)sizeof(*tlv_ip_reach)));
+ return (0);
+ }
+
+ if (!ND_TTEST(*tlv_ip_reach))
+ return (0);
+
+ prefix_len = mask2plen(EXTRACT_32BITS(tlv_ip_reach->mask));
+
+ if (prefix_len == -1)
+ ND_PRINT((ndo, "%sIPv4 prefix: %s mask %s",
+ ident,
+ ipaddr_string(ndo, (tlv_ip_reach->prefix)),
+ ipaddr_string(ndo, (tlv_ip_reach->mask))));
+ else
+ ND_PRINT((ndo, "%sIPv4 prefix: %15s/%u",
+ ident,
+ ipaddr_string(ndo, (tlv_ip_reach->prefix)),
+ prefix_len));
+
+ ND_PRINT((ndo, ", Distribution: %s, Metric: %u, %s",
+ ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up",
+ 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"));
+
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay))
+ ND_PRINT((ndo, "%s Delay Metric: %u, %s",
+ ident,
+ 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))
+ ND_PRINT((ndo, "%s Expense Metric: %u, %s",
+ ident,
+ 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))
+ ND_PRINT((ndo, "%s Error Metric: %u, %s",
+ ident,
+ 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(netdissect_options *ndo,
+ const uint8_t *tptr, int subt, int subl,
+ const char *ident) {
+
+ /* first lets see if we know the subTLVs name*/
+ ND_PRINT((ndo, "%s%s subTLV #%u, length: %u",
+ ident, tok2str(isis_ext_ip_reach_subtlv_values, "unknown", subt),
+ subt, subl));
+
+ if (!ND_TTEST2(*tptr,subl))
+ goto trunctlv;
+
+ switch(subt) {
+ case ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR: /* fall through */
+ case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32:
+ while (subl >= 4) {
+ ND_PRINT((ndo, ", 0x%08x (=%u)",
+ EXTRACT_32BITS(tptr),
+ EXTRACT_32BITS(tptr)));
+ tptr+=4;
+ subl-=4;
+ }
+ break;
+ case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64:
+ while (subl >= 8) {
+ ND_PRINT((ndo, ", 0x%08x%08x",
+ EXTRACT_32BITS(tptr),
+ EXTRACT_32BITS(tptr+4)));
+ tptr+=8;
+ subl-=8;
+ }
+ break;
+ default:
+ if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl))
+ return(0);
+ break;
+ }
+ return(1);
+
+trunctlv:
+ ND_PRINT((ndo, "%spacket exceeded snapshot", ident));
+ return(0);
+}
+
+/*
+ * this is the common IS-REACH subTLV decoder it is called
+ * from isis_print_ext_is_reach()
+ */
+
+static int
+isis_print_is_reach_subtlv(netdissect_options *ndo,
+ const uint8_t *tptr, u_int subt, u_int subl,
+ const char *ident) {
+
+ u_int te_class,priority_level,gmpls_switch_cap;
+ union { /* int to float conversion buffer for several subTLVs */
+ float f;
+ uint32_t i;
+ } bw;
+
+ /* first lets see if we know the subTLVs name*/
+ ND_PRINT((ndo, "%s%s subTLV #%u, length: %u",
+ ident, tok2str(isis_ext_is_reach_subtlv_values, "unknown", subt),
+ subt, subl));
+
+ if (!ND_TTEST2(*tptr,subl))
+ goto trunctlv;
+
+ switch(subt) {
+ case ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP:
+ case ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID:
+ case ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID:
+ if (subl >= 4) {
+ ND_PRINT((ndo, ", 0x%08x", EXTRACT_32BITS(tptr)));
+ if (subl == 8) /* rfc4205 */
+ ND_PRINT((ndo, ", 0x%08x", EXTRACT_32BITS(tptr+4)));
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR:
+ case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR:
+ if (subl >= sizeof(struct in_addr))
+ ND_PRINT((ndo, ", %s", ipaddr_string(ndo, tptr)));
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW :
+ case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW:
+ if (subl >= 4) {
+ bw.i = EXTRACT_32BITS(tptr);
+ ND_PRINT((ndo, ", %.3f Mbps", bw.f * 8 / 1000000));
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW :
+ if (subl >= 32) {
+ for (te_class = 0; te_class < 8; te_class++) {
+ bw.i = EXTRACT_32BITS(tptr);
+ ND_PRINT((ndo, "%s TE-Class %u: %.3f Mbps",
+ ident,
+ te_class,
+ bw.f * 8 / 1000000));
+ tptr+=4;
+ }
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */
+ case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD:
+ ND_PRINT((ndo, "%sBandwidth Constraints Model ID: %s (%u)",
+ ident,
+ tok2str(diffserv_te_bc_values, "unknown", *tptr),
+ *tptr));
+ tptr++;
+ /* decode BCs until the subTLV ends */
+ for (te_class = 0; te_class < (subl-1)/4; te_class++) {
+ bw.i = EXTRACT_32BITS(tptr);
+ ND_PRINT((ndo, "%s Bandwidth constraint CT%u: %.3f Mbps",
+ ident,
+ te_class,
+ bw.f * 8 / 1000000));
+ tptr+=4;
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC:
+ if (subl >= 3)
+ ND_PRINT((ndo, ", %u", EXTRACT_24BITS(tptr)));
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE:
+ if (subl == 2) {
+ ND_PRINT((ndo, ", [ %s ] (0x%04x)",
+ bittok2str(isis_subtlv_link_attribute_values,
+ "Unknown",
+ EXTRACT_16BITS(tptr)),
+ EXTRACT_16BITS(tptr)));
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE:
+ if (subl >= 2) {
+ ND_PRINT((ndo, ", %s, Priority %u",
+ bittok2str(gmpls_link_prot_values, "none", *tptr),
+ *(tptr+1)));
+ }
+ break;
+ case ISIS_SUBTLV_SPB_METRIC:
+ if (subl >= 6) {
+ ND_PRINT((ndo, ", LM: %u", EXTRACT_24BITS(tptr)));
+ tptr=tptr+3;
+ ND_PRINT((ndo, ", P: %u", *(tptr)));
+ tptr++;
+ ND_PRINT((ndo, ", P-ID: %u", EXTRACT_16BITS(tptr)));
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR:
+ if (subl >= 36) {
+ gmpls_switch_cap = *tptr;
+ ND_PRINT((ndo, "%s Interface Switching Capability:%s",
+ ident,
+ tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap)));
+ ND_PRINT((ndo, ", LSP Encoding: %s",
+ tok2str(gmpls_encoding_values, "Unknown", *(tptr + 1))));
+ tptr+=4;
+ ND_PRINT((ndo, "%s Max LSP Bandwidth:", ident));
+ for (priority_level = 0; priority_level < 8; priority_level++) {
+ bw.i = EXTRACT_32BITS(tptr);
+ ND_PRINT((ndo, "%s priority level %d: %.3f Mbps",
+ ident,
+ priority_level,
+ bw.f * 8 / 1000000));
+ tptr+=4;
+ }
+ subl-=36;
+ switch (gmpls_switch_cap) {
+ case GMPLS_PSC1:
+ case GMPLS_PSC2:
+ case GMPLS_PSC3:
+ case GMPLS_PSC4:
+ bw.i = EXTRACT_32BITS(tptr);
+ ND_PRINT((ndo, "%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000));
+ ND_PRINT((ndo, "%s Interface MTU: %u", ident, EXTRACT_16BITS(tptr + 4)));
+ break;
+ case GMPLS_TSC:
+ bw.i = EXTRACT_32BITS(tptr);
+ ND_PRINT((ndo, "%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000));
+ ND_PRINT((ndo, "%s Indication %s", ident,
+ tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", *(tptr + 4))));
+ break;
+ default:
+ /* 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 (!print_unknown_data(ndo, tptr, "\n\t\t ", subl))
+ return(0);
+ }
+ }
+ }
+ break;
+ default:
+ if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl))
+ return(0);
+ break;
+ }
+ return(1);
+
+trunctlv:
+ ND_PRINT((ndo, "%spacket exceeded snapshot", ident));
+ return(0);
+}
+
+
+/*
+ * this is the common IS-REACH decoder it is called
+ * from various EXTD-IS REACH style TLVs (22,24,222)
+ */
+
+static int
+isis_print_ext_is_reach(netdissect_options *ndo,
+ const uint8_t *tptr, const char *ident, int tlv_type) {
+
+ char ident_buffer[20];
+ int subtlv_type,subtlv_len,subtlv_sum_len;
+ int proc_bytes = 0; /* how many bytes did we process ? */
+
+ if (!ND_TTEST2(*tptr, NODE_ID_LEN))
+ return(0);
+
+ ND_PRINT((ndo, "%sIS Neighbor: %s", ident, isis_print_id(tptr, NODE_ID_LEN)));
+ tptr+=(NODE_ID_LEN);
+
+ if (tlv_type != ISIS_TLV_IS_ALIAS_ID) { /* the Alias TLV Metric field is implicit 0 */
+ if (!ND_TTEST2(*tptr, 3)) /* and is therefore skipped */
+ return(0);
+ ND_PRINT((ndo, ", Metric: %d", EXTRACT_24BITS(tptr)));
+ tptr+=3;
+ }
+
+ if (!ND_TTEST2(*tptr, 1))
+ return(0);
+ subtlv_sum_len=*(tptr++); /* read out subTLV length */
+ proc_bytes=NODE_ID_LEN+3+1;
+ ND_PRINT((ndo, ", %ssub-TLVs present",subtlv_sum_len ? "" : "no "));
+ if (subtlv_sum_len) {
+ ND_PRINT((ndo, " (%u)", subtlv_sum_len));
+ while (subtlv_sum_len>0) {
+ if (!ND_TTEST2(*tptr,2))
+ return(0);
+ subtlv_type=*(tptr++);
+ subtlv_len=*(tptr++);
+ /* prepend the ident string */
+ snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
+ if (!isis_print_is_reach_subtlv(ndo, tptr, subtlv_type, subtlv_len, ident_buffer))
+ return(0);
+ tptr+=subtlv_len;
+ subtlv_sum_len-=(subtlv_len+2);
+ proc_bytes+=(subtlv_len+2);
+ }
+ }
+ return(proc_bytes);
+}
+
+/*
+ * this is the common Multi Topology ID decoder
+ * it is called from various MT-TLVs (222,229,235,237)
+ */
+
+static int
+isis_print_mtid(netdissect_options *ndo,
+ const uint8_t *tptr, const char *ident) {
+
+ if (!ND_TTEST2(*tptr, 2))
+ return(0);
+
+ ND_PRINT((ndo, "%s%s",
+ ident,
+ tok2str(isis_mt_values,
+ "Reserved for IETF Consensus",
+ ISIS_MASK_MTID(EXTRACT_16BITS(tptr)))));
+
+ ND_PRINT((ndo, " Topology (0x%03x), Flags: [%s]",
+ ISIS_MASK_MTID(EXTRACT_16BITS(tptr)),
+ bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(EXTRACT_16BITS(tptr)))));
+
+ return(2);
+}
+
+/*
+ * this is the common extended IP reach decoder
+ * it is called from TLVs (135,235,236,237)
+ * we process the TLV and optional subTLVs and return
+ * the amount of processed bytes
+ */
+
+static int
+isis_print_extd_ip_reach(netdissect_options *ndo,
+ const uint8_t *tptr, const char *ident, uint16_t afi) {
+
+ char ident_buffer[20];
+#ifdef INET6
+ uint8_t prefix[sizeof(struct in6_addr)]; /* shared copy buffer for IPv4 and IPv6 prefixes */
+#else
+ uint8_t prefix[sizeof(struct in_addr)]; /* shared copy buffer for IPv4 prefixes */
+#endif
+ u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen;
+
+ if (!ND_TTEST2(*tptr, 4))
+ return (0);
+ metric = EXTRACT_32BITS(tptr);
+ processed=4;
+ tptr+=4;
+
+ if (afi == AF_INET) {
+ if (!ND_TTEST2(*tptr, 1)) /* fetch status byte */
+ return (0);
+ status_byte=*(tptr++);
+ bit_length = status_byte&0x3f;
+ if (bit_length > 32) {
+ ND_PRINT((ndo, "%sIPv4 prefix: bad bit length %u",
+ ident,
+ bit_length));
+ return (0);
+ }
+ processed++;
+#ifdef INET6
+ } else if (afi == AF_INET6) {
+ if (!ND_TTEST2(*tptr, 1)) /* fetch status & prefix_len byte */
+ return (0);
+ status_byte=*(tptr++);
+ bit_length=*(tptr++);
+ if (bit_length > 128) {
+ ND_PRINT((ndo, "%sIPv6 prefix: bad bit length %u",
+ ident,
+ bit_length));
+ return (0);
+ }
+ processed+=2;
+#endif
+ } else
+ return (0); /* somebody is fooling us */
+
+ byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */
+
+ if (!ND_TTEST2(*tptr, byte_length))
+ return (0);
+ memset(prefix, 0, sizeof prefix); /* 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 == AF_INET)
+ ND_PRINT((ndo, "%sIPv4 prefix: %15s/%u",
+ ident,
+ ipaddr_string(ndo, prefix),
+ bit_length));
+#ifdef INET6
+ if (afi == AF_INET6)
+ ND_PRINT((ndo, "%sIPv6 prefix: %s/%u",
+ ident,
+ ip6addr_string(ndo, prefix),
+ bit_length));
+#endif
+
+ ND_PRINT((ndo, ", Distribution: %s, Metric: %u",
+ ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up",
+ metric));
+
+ if (afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
+ ND_PRINT((ndo, ", sub-TLVs present"));
+#ifdef INET6
+ if (afi == AF_INET6)
+ ND_PRINT((ndo, ", %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 ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
+#ifdef INET6
+ || (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte))
+#endif
+ ) {
+ /* 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 (!ND_TTEST2(*tptr, 1))
+ return (0);
+ sublen=*(tptr++);
+ processed+=sublen+1;
+ ND_PRINT((ndo, " (%u)", sublen)); /* print out subTLV length */
+
+ while (sublen>0) {
+ if (!ND_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(ndo, 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(netdissect_options *ndo,
+ const uint8_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;
+ 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 pdu_type, max_area, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len;
+ uint8_t ext_is_len, ext_ip_len, mt_len;
+ const uint8_t *optr, *pptr, *tptr;
+ u_short packet_len,pdu_len, key_id;
+ u_int i,vendor_id;
+ int sigcheck;
+
+ 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(*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 = (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((ndo, "IS-IS"));
+
+ /*
+ * Sanity checking of the header.
+ */
+
+ if (isis_header->version != ISIS_VERSION) {
+ ND_PRINT((ndo, "version %d packet not supported", isis_header->version));
+ return (0);
+ }
+
+ if ((isis_header->id_length != SYSTEM_ID_LEN) && (isis_header->id_length != 0)) {
+ ND_PRINT((ndo, "system ID length of %d is not supported",
+ isis_header->id_length));
+ return (0);
+ }
+
+ if (isis_header->pdu_version != ISIS_VERSION) {
+ ND_PRINT((ndo, "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:
+ ND_PRINT((ndo, "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 ) {
+ ND_PRINT((ndo, "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 (ndo->ndo_vflag < 1) {
+ ND_PRINT((ndo, "%s%s",
+ ndo->ndo_eflag ? "" : ", ",
+ 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:
+ ND_PRINT((ndo, ", src-id %s",
+ isis_print_id(header_iih_lan->source_id, SYSTEM_ID_LEN)));
+ ND_PRINT((ndo, ", 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:
+ ND_PRINT((ndo, ", 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:
+ ND_PRINT((ndo, ", 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:
+ ND_PRINT((ndo, ", src-id %s", isis_print_id(header_csnp->source_id, NODE_ID_LEN)));
+ break;
+ case ISIS_PDU_L1_PSNP:
+ case ISIS_PDU_L2_PSNP:
+ ND_PRINT((ndo, ", src-id %s", isis_print_id(header_psnp->source_id, NODE_ID_LEN)));
+ break;
+
+ }
+ ND_PRINT((ndo, ", length %u", length));
+
+ return(1);
+ }
+
+ /* ok they seem to want to know everything - lets fully decode it */
+ ND_PRINT((ndo, "%slength %u", ndo->ndo_eflag ? "" : ", ", length));
+
+ ND_PRINT((ndo, "\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 (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 (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) {
+ ND_PRINT((ndo, ", 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;
+ }
+
+ ND_TCHECK(*header_iih_lan);
+ ND_PRINT((ndo, "\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)));
+
+ ND_PRINT((ndo, "\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 (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, 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)) {
+ ND_PRINT((ndo, ", 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;
+ }
+
+ ND_TCHECK(*header_iih_ptp);
+ ND_PRINT((ndo, "\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)));
+
+ ND_PRINT((ndo, "\n\t circuit-id: 0x%02x, PDU length: %u",
+ 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);
+ }
+
+ 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)) {
+ ND_PRINT((ndo, ", 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;
+ }
+
+ ND_TCHECK(*header_lsp);
+ ND_PRINT((ndo, "\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)));
+
+
+ osi_print_cksum(ndo, (uint8_t *)header_lsp->lsp_id,
+ EXTRACT_16BITS(header_lsp->checksum), 12, length-12);
+
+ /*
+ * Clear checksum and lifetime prior to signature verification.
+ */
+ header_lsp->checksum[0] = 0;
+ header_lsp->checksum[1] = 0;
+ header_lsp->remaining_lifetime[0] = 0;
+ header_lsp->remaining_lifetime[1] = 0;
+
+
+ ND_PRINT((ndo, ", 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((ndo, "%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : ""));
+ ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : ""));
+ ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : ""));
+ ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : ""));
+ ND_PRINT((ndo, "ATT bit set, "));
+ }
+ ND_PRINT((ndo, "%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : ""));
+ ND_PRINT((ndo, "%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);
+ }
+
+ 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)) {
+ ND_PRINT((ndo, ", 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;
+ }
+
+ ND_TCHECK(*header_csnp);
+ ND_PRINT((ndo, "\n\t source-id: %s, PDU length: %u",
+ isis_print_id(header_csnp->source_id, NODE_ID_LEN),
+ pdu_len));
+ ND_PRINT((ndo, "\n\t start lsp-id: %s",
+ isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN)));
+ ND_PRINT((ndo, "\n\t end lsp-id: %s",
+ isis_print_id(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);
+ }
+
+ 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)) {
+ ND_PRINT((ndo, "- 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;
+ }
+
+ ND_TCHECK(*header_psnp);
+ ND_PRINT((ndo, "\n\t source-id: %s, PDU length: %u",
+ isis_print_id(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);
+ }
+
+ 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(ndo, pptr, "\n\t ", length))
+ return(0);
+ return (0);
+ }
+
+ /*
+ * Now print the TLV's.
+ */
+
+ while (packet_len >= 2) {
+ if (pptr == ndo->ndo_snapend) {
+ return (1);
+ }
+
+ if (!ND_TTEST2(*pptr, 2)) {
+ ND_PRINT((ndo, "\n\t\t packet exceeded snapshot (%ld) bytes",
+ (long)(pptr - ndo->ndo_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*/
+ ND_PRINT((ndo, "\n\t %s TLV #%u, length: %u",
+ tok2str(isis_tlv_values,
+ "unknown",
+ tlv_type),
+ tlv_type,
+ tlv_len));
+
+ if (tlv_len == 0) /* something is malformed */
+ continue;
+
+ /* now check if we have a decoder otherwise do a hexdump at the end*/
+ switch (tlv_type) {
+ case ISIS_TLV_AREA_ADDR:
+ if (!ND_TTEST2(*tptr, 1))
+ goto trunctlv;
+ alen = *tptr++;
+ while (tmp && alen < tmp) {
+ ND_PRINT((ndo, "\n\t Area address (length: %u): %s",
+ alen,
+ isonsap_string(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 (!ND_TTEST2(*tptr, 1))
+ goto trunctlv;
+ alen = *tptr++;
+ }
+ break;
+ case ISIS_TLV_ISNEIGH:
+ while (tmp >= ETHER_ADDR_LEN) {
+ if (!ND_TTEST2(*tptr, ETHER_ADDR_LEN))
+ goto trunctlv;
+ ND_PRINT((ndo, "\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 (!ND_TTEST2(*tptr, 1) || tmp < 3) /* min. TLV length */
+ goto trunctlv;
+ lan_alen = *tptr++; /* LAN address length */
+ if (lan_alen == 0) {
+ ND_PRINT((ndo, "\n\t LAN address length 0 bytes (invalid)"));
+ break;
+ }
+ tmp --;
+ ND_PRINT((ndo, "\n\t LAN address length %u bytes ", lan_alen));
+ while (tmp >= lan_alen) {
+ if (!ND_TTEST2(*tptr, lan_alen))
+ goto trunctlv;
+ ND_PRINT((ndo, "\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:
+ mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
+ if (mt_len == 0) /* did something go wrong ? */
+ goto trunctlv;
+ tptr+=mt_len;
+ tmp-=mt_len;
+ while (tmp >= 2+NODE_ID_LEN+3+1) {
+ ext_is_len = isis_print_ext_is_reach(ndo, 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(ndo, 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(ndo, 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 (!ND_TTEST2(*tptr,1)) /* check if there is one byte left to read out the virtual flag */
+ goto trunctlv;
+ ND_PRINT((ndo, "\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 (!ND_TTEST(*tlv_is_reach))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t IS Neighbor: %s",
+ isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN)));
+ isis_print_metric_block(ndo, &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 (!ND_TTEST(*tlv_es_reach))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t ES Neighbor: %s",
+ isis_print_id(tlv_es_reach->neighbor_sysid, SYSTEM_ID_LEN)));
+ isis_print_metric_block(ndo, &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(ndo, 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(ndo, tptr, "\n\t ", AF_INET);
+ 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:
+ mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
+ if (mt_len == 0) { /* did something go wrong ? */
+ goto trunctlv;
+ }
+ tptr+=mt_len;
+ tmp-=mt_len;
+
+ while (tmp>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 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(ndo, tptr, "\n\t ", AF_INET6);
+ 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:
+ mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
+ if (mt_len == 0) { /* did something go wrong ? */
+ goto trunctlv;
+ }
+ tptr+=mt_len;
+ tmp-=mt_len;
+
+ while (tmp>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 trunctlv;
+ tptr+=ext_ip_len;
+ tmp-=ext_ip_len;
+ }
+ break;
+
+ case ISIS_TLV_IP6ADDR:
+ while (tmp>=sizeof(struct in6_addr)) {
+ if (!ND_TTEST2(*tptr, sizeof(struct in6_addr)))
+ goto trunctlv;
+
+ ND_PRINT((ndo, "\n\t IPv6 interface address: %s",
+ ip6addr_string(ndo, tptr)));
+
+ tptr += sizeof(struct in6_addr);
+ tmp -= sizeof(struct in6_addr);
+ }
+ break;
+#endif
+ case ISIS_TLV_AUTH:
+ if (!ND_TTEST2(*tptr, 1))
+ goto trunctlv;
+
+ ND_PRINT((ndo, "\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 (!ND_TTEST2(*(tptr + i), 1))
+ goto trunctlv;
+ ND_PRINT((ndo, "%c", *(tptr + i)));
+ }
+ break;
+ case ISIS_SUBTLV_AUTH_MD5:
+ for(i=1;i<tlv_len;i++) {
+ if (!ND_TTEST2(*(tptr + i), 1))
+ goto trunctlv;
+ ND_PRINT((ndo, "%02x", *(tptr + i)));
+ }
+ if (tlv_len != ISIS_SUBTLV_AUTH_MD5_LEN+1)
+ ND_PRINT((ndo, ", (malformed subTLV) "));
+
+#ifdef HAVE_LIBCRYPTO
+ sigcheck = signature_verify(ndo, optr, length,
+ (unsigned char *)tptr + 1);
+#else
+ sigcheck = CANT_CHECK_SIGNATURE;
+#endif
+ ND_PRINT((ndo, " (%s)", tok2str(signature_check_values, "Unknown", sigcheck)));
+
+ break;
+ case ISIS_SUBTLV_AUTH_GENERIC:
+ key_id = EXTRACT_16BITS((tptr+1));
+ ND_PRINT((ndo, "%u, password: ", key_id));
+ for(i=1 + sizeof(uint16_t);i<tlv_len;i++) {
+ if (!ND_TTEST2(*(tptr + i), 1))
+ goto trunctlv;
+ ND_PRINT((ndo, "%02x", *(tptr + i)));
+ }
+ break;
+ case ISIS_SUBTLV_AUTH_PRIVATE:
+ default:
+ if (!print_unknown_data(ndo, tptr + 1, "\n\t\t ", tlv_len - 1))
+ return(0);
+ break;
+ }
+ break;
+
+ case ISIS_TLV_PTP_ADJ:
+ tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr;
+ if(tmp>=1) {
+ if (!ND_TTEST2(*tptr, 1))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t Adjacency State: %s (%u)",
+ tok2str(isis_ptp_adjancey_values, "unknown", *tptr),
+ *tptr));
+ tmp--;
+ }
+ if(tmp>sizeof(tlv_ptp_adj->extd_local_circuit_id)) {
+ if (!ND_TTEST2(tlv_ptp_adj->extd_local_circuit_id,
+ sizeof(tlv_ptp_adj->extd_local_circuit_id)))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t Extended Local circuit-ID: 0x%08x",
+ EXTRACT_32BITS(tlv_ptp_adj->extd_local_circuit_id)));
+ tmp-=sizeof(tlv_ptp_adj->extd_local_circuit_id);
+ }
+ if(tmp>=SYSTEM_ID_LEN) {
+ if (!ND_TTEST2(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t Neighbor System-ID: %s",
+ isis_print_id(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN)));
+ tmp-=SYSTEM_ID_LEN;
+ }
+ if(tmp>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) {
+ if (!ND_TTEST2(tlv_ptp_adj->neighbor_extd_local_circuit_id,
+ sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t Neighbor Extended Local circuit-ID: 0x%08x",
+ EXTRACT_32BITS(tlv_ptp_adj->neighbor_extd_local_circuit_id)));
+ }
+ break;
+
+ case ISIS_TLV_PROTOCOLS:
+ ND_PRINT((ndo, "\n\t NLPID(s): "));
+ while (tmp>0) {
+ if (!ND_TTEST2(*(tptr), 1))
+ goto trunctlv;
+ ND_PRINT((ndo, "%s (0x%02x)",
+ tok2str(nlpid_values,
+ "unknown",
+ *tptr),
+ *tptr));
+ if (tmp>1) /* further NPLIDs ? - put comma */
+ ND_PRINT((ndo, ", "));
+ tptr++;
+ tmp--;
+ }
+ break;
+
+ case ISIS_TLV_MT_PORT_CAP:
+ {
+ if (!ND_TTEST2(*(tptr), 2))
+ goto trunctlv;
+
+ ND_PRINT((ndo, "\n\t RES: %d, MTID(s): %d",
+ (EXTRACT_16BITS (tptr) >> 12),
+ (EXTRACT_16BITS (tptr) & 0x0fff)));
+
+ tmp = tmp-2;
+ tptr = tptr+2;
+
+ if (tmp)
+ isis_print_mt_port_cap_subtlv(ndo, tptr, tmp);
+
+ break;
+ }
+
+ case ISIS_TLV_MT_CAPABILITY:
+
+ if (!ND_TTEST2(*(tptr), 2))
+ goto trunctlv;
+
+ ND_PRINT((ndo, "\n\t O: %d, RES: %d, MTID(s): %d",
+ (EXTRACT_16BITS(tptr) >> 15) & 0x01,
+ (EXTRACT_16BITS(tptr) >> 12) & 0x07,
+ EXTRACT_16BITS(tptr) & 0x0fff));
+
+ tmp = tmp-2;
+ tptr = tptr+2;
+
+ if (tmp)
+ isis_print_mt_capability_subtlv(ndo, tptr, tmp);
+
+ break;
+
+ case ISIS_TLV_TE_ROUTER_ID:
+ if (!ND_TTEST2(*pptr, sizeof(struct in_addr)))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t Traffic Engineering Router ID: %s", ipaddr_string(ndo, pptr)));
+ break;
+
+ case ISIS_TLV_IPADDR:
+ while (tmp>=sizeof(struct in_addr)) {
+ if (!ND_TTEST2(*tptr, sizeof(struct in_addr)))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr)));
+ tptr += sizeof(struct in_addr);
+ tmp -= sizeof(struct in_addr);
+ }
+ break;
+
+ case ISIS_TLV_HOSTNAME:
+ ND_PRINT((ndo, "\n\t Hostname: "));
+ while (tmp>0) {
+ if (!ND_TTEST2(*tptr, 1))
+ goto trunctlv;
+ ND_PRINT((ndo, "%c", *tptr++));
+ tmp--;
+ }
+ break;
+
+ case ISIS_TLV_SHARED_RISK_GROUP:
+ if (tmp < NODE_ID_LEN)
+ break;
+ if (!ND_TTEST2(*tptr, NODE_ID_LEN))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t IS Neighbor: %s", isis_print_id(tptr, NODE_ID_LEN)));
+ tptr+=(NODE_ID_LEN);
+ tmp-=(NODE_ID_LEN);
+
+ if (tmp < 1)
+ break;
+ if (!ND_TTEST2(*tptr, 1))
+ goto trunctlv;
+ ND_PRINT((ndo, ", Flags: [%s]", ISIS_MASK_TLV_SHARED_RISK_GROUP(*tptr++) ? "numbered" : "unnumbered"));
+ tmp--;
+
+ if (tmp < sizeof(struct in_addr))
+ break;
+ if (!ND_TTEST2(*tptr, sizeof(struct in_addr)))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr)));
+ tptr+=sizeof(struct in_addr);
+ tmp-=sizeof(struct in_addr);
+
+ if (tmp < sizeof(struct in_addr))
+ break;
+ if (!ND_TTEST2(*tptr, sizeof(struct in_addr)))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t IPv4 neighbor address: %s", ipaddr_string(ndo, tptr)));
+ tptr+=sizeof(struct in_addr);
+ tmp-=sizeof(struct in_addr);
+
+ while (tmp>=4) {
+ if (!ND_TTEST2(*tptr, 4))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t Link-ID: 0x%08x", EXTRACT_32BITS(tptr)));
+ tptr+=4;
+ tmp-=4;
+ }
+ break;
+
+ case ISIS_TLV_LSP:
+ tlv_lsp = (const struct isis_tlv_lsp *)tptr;
+ while(tmp>=sizeof(struct isis_tlv_lsp)) {
+ if (!ND_TTEST((tlv_lsp->lsp_id)[LSP_ID_LEN-1]))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t lsp-id: %s",
+ isis_print_id(tlv_lsp->lsp_id, LSP_ID_LEN)));
+ if (!ND_TTEST2(tlv_lsp->sequence_number, 4))
+ goto trunctlv;
+ ND_PRINT((ndo, ", seq: 0x%08x", EXTRACT_32BITS(tlv_lsp->sequence_number)));
+ if (!ND_TTEST2(tlv_lsp->remaining_lifetime, 2))
+ goto trunctlv;
+ ND_PRINT((ndo, ", lifetime: %5ds", EXTRACT_16BITS(tlv_lsp->remaining_lifetime)));
+ if (!ND_TTEST2(tlv_lsp->checksum, 2))
+ goto trunctlv;
+ ND_PRINT((ndo, ", chksum: 0x%04x", EXTRACT_16BITS(tlv_lsp->checksum)));
+ tmp-=sizeof(struct isis_tlv_lsp);
+ tlv_lsp++;
+ }
+ break;
+
+ case ISIS_TLV_CHECKSUM:
+ if (tmp < ISIS_TLV_CHECKSUM_MINLEN)
+ break;
+ if (!ND_TTEST2(*tptr, ISIS_TLV_CHECKSUM_MINLEN))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t checksum: 0x%04x ", EXTRACT_16BITS(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, EXTRACT_16BITS(tptr), tptr-optr, length);
+ break;
+
+ case ISIS_TLV_MT_SUPPORTED:
+ if (tmp < ISIS_TLV_MT_SUPPORTED_MINLEN)
+ break;
+ while (tmp>1) {
+ /* length can only be a multiple of 2, otherwise there is
+ something broken -> so decode down until length is 1 */
+ if (tmp!=1) {
+ mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
+ if (mt_len == 0) /* did something go wrong ? */
+ goto trunctlv;
+ tptr+=mt_len;
+ tmp-=mt_len;
+ } else {
+ ND_PRINT((ndo, "\n\t malformed MT-ID"));
+ break;
+ }
+ }
+ break;
+
+ case ISIS_TLV_RESTART_SIGNALING:
+ /* first attempt to decode the flags */
+ if (tmp < ISIS_TLV_RESTART_SIGNALING_FLAGLEN)
+ break;
+ if (!ND_TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t Flags [%s]",
+ bittok2str(isis_restart_flag_values, "none", *tptr)));
+ tptr+=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
+ tmp-=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
+
+ /* is there anything other than the flags field? */
+ if (tmp == 0)
+ break;
+
+ if (tmp < ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN)
+ break;
+ if (!ND_TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN))
+ goto trunctlv;
+
+ ND_PRINT((ndo, ", Remaining holding time %us", EXTRACT_16BITS(tptr)));
+ tptr+=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
+ tmp-=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
+
+ /* is there an additional sysid field present ?*/
+ if (tmp == SYSTEM_ID_LEN) {
+ if (!ND_TTEST2(*tptr, SYSTEM_ID_LEN))
+ goto trunctlv;
+ ND_PRINT((ndo, ", for %s", isis_print_id(tptr,SYSTEM_ID_LEN)));
+ }
+ break;
+
+ case ISIS_TLV_IDRP_INFO:
+ if (tmp < ISIS_TLV_IDRP_INFO_MINLEN)
+ break;
+ if (!ND_TTEST2(*tptr, ISIS_TLV_IDRP_INFO_MINLEN))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t Inter-Domain Information Type: %s",
+ tok2str(isis_subtlv_idrp_values,
+ "Unknown (0x%02x)",
+ *tptr)));
+ switch (*tptr++) {
+ case ISIS_SUBTLV_IDRP_ASN:
+ if (!ND_TTEST2(*tptr, 2)) /* fetch AS number */
+ goto trunctlv;
+ ND_PRINT((ndo, "AS Number: %u", EXTRACT_16BITS(tptr)));
+ break;
+ case ISIS_SUBTLV_IDRP_LOCAL:
+ case ISIS_SUBTLV_IDRP_RES:
+ default:
+ if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_len - 1))
+ return(0);
+ break;
+ }
+ break;
+
+ case ISIS_TLV_LSP_BUFFERSIZE:
+ if (tmp < ISIS_TLV_LSP_BUFFERSIZE_MINLEN)
+ break;
+ if (!ND_TTEST2(*tptr, ISIS_TLV_LSP_BUFFERSIZE_MINLEN))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t LSP Buffersize: %u", EXTRACT_16BITS(tptr)));
+ break;
+
+ case ISIS_TLV_PART_DIS:
+ while (tmp >= SYSTEM_ID_LEN) {
+ if (!ND_TTEST2(*tptr, SYSTEM_ID_LEN))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t %s", isis_print_id(tptr, SYSTEM_ID_LEN)));
+ tptr+=SYSTEM_ID_LEN;
+ tmp-=SYSTEM_ID_LEN;
+ }
+ break;
+
+ case ISIS_TLV_PREFIX_NEIGH:
+ if (tmp < sizeof(struct isis_metric_block))
+ break;
+ if (!ND_TTEST2(*tptr, sizeof(struct isis_metric_block)))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t Metric Block"));
+ isis_print_metric_block(ndo, (const struct isis_metric_block *)tptr);
+ tptr+=sizeof(struct isis_metric_block);
+ tmp-=sizeof(struct isis_metric_block);
+
+ while(tmp>0) {
+ if (!ND_TTEST2(*tptr, 1))
+ goto trunctlv;
+ prefix_len=*tptr++; /* read out prefix length in semioctets*/
+ if (prefix_len < 2) {
+ ND_PRINT((ndo, "\n\t\tAddress: prefix length %u < 2", prefix_len));
+ break;
+ }
+ tmp--;
+ if (tmp < prefix_len/2)
+ break;
+ if (!ND_TTEST2(*tptr, prefix_len / 2))
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t\tAddress: %s/%u",
+ isonsap_string(tptr, prefix_len / 2), prefix_len * 4));
+ tptr+=prefix_len/2;
+ tmp-=prefix_len/2;
+ }
+ break;
+
+ case ISIS_TLV_IIH_SEQNR:
+ if (tmp < ISIS_TLV_IIH_SEQNR_MINLEN)
+ break;
+ if (!ND_TTEST2(*tptr, ISIS_TLV_IIH_SEQNR_MINLEN)) /* check if four bytes are on the wire */
+ goto trunctlv;
+ ND_PRINT((ndo, "\n\t Sequence number: %u", EXTRACT_32BITS(tptr)));
+ break;
+
+ case ISIS_TLV_VENDOR_PRIVATE:
+ if (tmp < ISIS_TLV_VENDOR_PRIVATE_MINLEN)
+ break;
+ if (!ND_TTEST2(*tptr, ISIS_TLV_VENDOR_PRIVATE_MINLEN)) /* check if enough byte for a full oui */
+ goto trunctlv;
+ vendor_id = EXTRACT_24BITS(tptr);
+ ND_PRINT((ndo, "\n\t Vendor: %s (%u)",
+ tok2str(oui_values, "Unknown", vendor_id),
+ vendor_id));
+ tptr+=3;
+ tmp-=3;
+ if (tmp > 0) /* hexdump the rest */
+ if (!print_unknown_data(ndo, tptr, "\n\t\t", tmp))
+ 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;
+ }
+ /* 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);
+ }
+
+ pptr += tlv_len;
+ packet_len -= tlv_len;
+ }
+
+ if (packet_len != 0) {
+ ND_PRINT((ndo, "\n\t %u straggler bytes", packet_len));
+ }
+ return (1);
+
+ trunc:
+ ND_PRINT((ndo, "[|isis]"));
+ return (1);
+
+ trunctlv:
+ ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
+ return(1);
+}
+
+static void
+osi_print_cksum(netdissect_options *ndo,
+ const uint8_t *pptr, uint16_t checksum,
+ u_int checksum_offset, u_int length)
+{
+ uint16_t calculated_checksum;
+
+ /* do not attempt to verify the checksum if it is zero */
+ if (!checksum) {
+ ND_PRINT((ndo, "(unverified)"));
+ } else {
+ calculated_checksum = create_osi_cksum(pptr, checksum_offset, length);
+ if (checksum == calculated_checksum) {
+ ND_PRINT((ndo, " (correct)"));
+ } else {
+ ND_PRINT((ndo, " (incorrect should be 0x%04x)", calculated_checksum));
+ }
+ }
+}
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */
projects / tcpdump / blobdiff