+int ldp_msg_print(register const u_char *);
+int ldp_tlv_print(register const u_char *);
+
+/*
+ * ldp tlv header
+ *
+ * 0 1 2 3
+ * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |U|F| Type | Length |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | |
+ * | Value |
+ * ~ ~
+ * | |
+ * | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+
+int
+ldp_tlv_print(register const u_char *tptr) {
+
+ struct ldp_tlv_header {
+ u_int8_t type[2];
+ u_int8_t length[2];
+ };
+
+ const struct ldp_tlv_header *ldp_tlv_header;
+ u_short tlv_type,tlv_len,tlv_tlen,af,ft_flags;
+ u_char fec_type;
+ u_int ui,vc_info_len, vc_info_tlv_type, vc_info_tlv_len,idx;
+ char buf[100];
+ int i;
+
+ ldp_tlv_header = (const struct ldp_tlv_header *)tptr;
+ tlv_len=EXTRACT_16BITS(ldp_tlv_header->length);
+ tlv_tlen=tlv_len;
+ tlv_type=LDP_MASK_TLV_TYPE(EXTRACT_16BITS(ldp_tlv_header->type));
+
+ /* FIXME vendor private / experimental check */
+ printf("\n\t %s TLV (0x%04x), length: %u, Flags: [%s and %s forward if unknown]",
+ tok2str(ldp_tlv_values,
+ "Unknown",
+ tlv_type),
+ tlv_type,
+ tlv_len,
+ LDP_MASK_U_BIT(EXTRACT_16BITS(&ldp_tlv_header->type)) ? "continue processing" : "ignore",
+ LDP_MASK_F_BIT(EXTRACT_16BITS(&ldp_tlv_header->type)) ? "do" : "don't");
+
+ tptr+=sizeof(struct ldp_tlv_header);
+
+ switch(tlv_type) {
+
+ case LDP_TLV_COMMON_HELLO:
+ printf("\n\t Hold Time: %us, Flags: [%s Hello%s]",
+ EXTRACT_16BITS(tptr),
+ (EXTRACT_16BITS(tptr+2)&0x8000) ? "Targeted" : "Link",
+ (EXTRACT_16BITS(tptr+2)&0x4000) ? ", Request for targeted Hellos" : "");
+ break;
+
+ case LDP_TLV_IPV4_TRANSPORT_ADDR:
+ printf("\n\t IPv4 Transport Address: %s", ipaddr_string(tptr));
+ break;
+#ifdef INET6
+ case LDP_TLV_IPV6_TRANSPORT_ADDR:
+ printf("\n\t IPv6 Transport Address: %s", ip6addr_string(tptr));
+ break;
+#endif
+ case LDP_TLV_CONFIG_SEQ_NUMBER:
+ printf("\n\t Sequence Number: %u", EXTRACT_32BITS(tptr));
+ break;
+
+ case LDP_TLV_ADDRESS_LIST:
+ af = EXTRACT_16BITS(tptr);
+ tptr+=2;
+ printf("\n\t Adress Family: ");
+ if (af == AFNUM_INET) {
+ printf("IPv4, addresses:");
+ for (i=0; i<(tlv_tlen-2)/4; i++) {
+ printf(" %s",ipaddr_string(tptr));
+ tptr+=4;
+ }
+ }
+#ifdef INET6
+ else if (af == AFNUM_INET6) {
+ printf("IPv6, addresses:");
+ for (i=0; i<(tlv_tlen-2)/16; i++) {
+ printf(" %s",ip6addr_string(tptr));
+ tptr+=16;
+ }
+ }
+#endif
+ break;
+
+ case LDP_TLV_COMMON_SESSION:
+ printf("\n\t Version: %u, Keepalive: %us, Flags: [Downstream %s, Loop Detection %s]",
+ EXTRACT_16BITS(tptr), EXTRACT_16BITS(tptr+2),
+ (EXTRACT_16BITS(tptr+6)&0x8000) ? "On Demand" : "Unsolicited",
+ (EXTRACT_16BITS(tptr+6)&0x4000) ? "Enabled" : "Disabled"
+ );
+ break;
+
+ case LDP_TLV_FEC:
+ fec_type = *tptr;
+ printf("\n\t %s FEC (0x%02x)",
+ tok2str(ldp_fec_values, "Unknown", fec_type),
+ fec_type);
+
+ tptr+=1;
+ switch(fec_type) {
+
+ case LDP_FEC_WILDCARD:
+ break;
+ case LDP_FEC_PREFIX:
+ af = EXTRACT_16BITS(tptr);
+ tptr+=2;
+ if (af == AFNUM_INET) {
+ i=decode_prefix4(tptr,buf,sizeof(buf));
+ printf(": IPv4 prefix %s",buf);
+ }
+#ifdef INET6
+ else if (af == AFNUM_INET6) {
+ i=decode_prefix6(tptr,buf,sizeof(buf));
+ printf(": IPv6 prefix %s",buf);
+ }
+#endif
+ break;
+ case LDP_FEC_HOSTADDRESS:
+ break;
+ case LDP_FEC_MARTINI_VC:
+ if (!TTEST2(*tptr, 11))
+ goto trunc;
+ vc_info_len = *(tptr+2);
+
+ printf(": %s, %scontrol word, group-ID %u, VC-ID %u, VC-info-length: %u",
+ tok2str(l2vpn_encaps_values, "Unknown", EXTRACT_16BITS(tptr)&0x7fff),
+ EXTRACT_16BITS(tptr)&0x8000 ? "" : "no ",
+ EXTRACT_32BITS(tptr+3),
+ EXTRACT_32BITS(tptr+7),
+ vc_info_len);
+
+ if (vc_info_len == 0) /* infinite loop protection */
+ break;
+
+ tptr+=11;
+ if (!TTEST2(*tptr, vc_info_len))
+ goto trunc;
+
+ while (vc_info_len > 2) {
+ vc_info_tlv_type = *tptr;
+ vc_info_tlv_len = *(tptr+1);
+ if (vc_info_tlv_len < 2)
+ break;
+
+ printf("\n\t\tInterface Parameter: %s (0x%02x), len %u",
+ tok2str(ldp_fec_martini_ifparm_values,"Unknown",vc_info_tlv_type),
+ vc_info_tlv_type,
+ vc_info_tlv_len);
+
+ switch(vc_info_tlv_type) {
+ case LDP_FEC_MARTINI_IFPARM_MTU:
+ printf(": %u",EXTRACT_16BITS(tptr+2));
+ break;
+
+ case LDP_FEC_MARTINI_IFPARM_DESC:
+ printf(": ");
+ for (idx = 2; idx < vc_info_tlv_len; idx++)
+ safeputchar(*(tptr+idx));
+ break;
+
+ case LDP_FEC_MARTINI_IFPARM_VCCV:
+ printf("\n\t\t Control Channels (0x%02x) = [%s]",
+ *(tptr+2),
+ bittok2str(ldp_fec_martini_ifparm_vccv_cc_values,"none",*(tptr+2)));
+ printf("\n\t\t CV Types (0x%02x) = [%s]",
+ *(tptr+3),
+ bittok2str(ldp_fec_martini_ifparm_vccv_cv_values,"none",*(tptr+3)));
+ break;
+
+ default:
+ print_unknown_data(tptr+2,"\n\t\t ",vc_info_tlv_len-2);
+ break;
+ }
+
+ vc_info_len -= vc_info_tlv_len;
+ tptr += vc_info_tlv_len;
+ }
+ break;
+ }
+
+ break;
+
+ case LDP_TLV_GENERIC_LABEL:
+ printf("\n\t Label: %u", EXTRACT_32BITS(tptr) & 0xfffff);
+ break;
+
+ case LDP_TLV_STATUS:
+ ui = EXTRACT_32BITS(tptr);
+ tptr+=4;
+ printf("\n\t Status: 0x%02x, Flags: [%s and %s forward]",
+ ui&0x3fffffff,
+ ui&0x80000000 ? "Fatal error" : "Advisory Notification",
+ ui&0x40000000 ? "do" : "don't");
+ ui = EXTRACT_32BITS(tptr);
+ tptr+=4;
+ if (ui)
+ printf(", causing Message ID: 0x%08x", ui);
+ break;
+
+ case LDP_TLV_FT_SESSION:
+ ft_flags = EXTRACT_16BITS(tptr);
+ printf("\n\t Flags: [%sReconnect, %sSave State, %sAll-Label Protection, %s Checkpoint, %sRe-Learn State]",
+ ft_flags&0x8000 ? "" : "No ",
+ ft_flags&0x8 ? "" : "Don't ",
+ ft_flags&0x4 ? "" : "No ",
+ ft_flags&0x2 ? "Sequence Numbered Label" : "All Labels",
+ ft_flags&0x1 ? "" : "Don't ");
+ tptr+=4;
+ ui = EXTRACT_32BITS(tptr);
+ if (ui)
+ printf(", Reconnect Timeout: %ums", ui);
+ tptr+=4;
+ ui = EXTRACT_32BITS(tptr);
+ if (ui)
+ printf(", Recovery Time: %ums", ui);
+ break;
+
+
+ /*
+ * FIXME those are the defined TLVs that lack a decoder
+ * you are welcome to contribute code ;-)
+ */
+
+ case LDP_TLV_HOP_COUNT:
+ case LDP_TLV_PATH_VECTOR:
+ case LDP_TLV_ATM_LABEL:
+ case LDP_TLV_FR_LABEL:
+ case LDP_TLV_EXTD_STATUS:
+ case LDP_TLV_RETURNED_PDU:
+ case LDP_TLV_RETURNED_MSG:
+ case LDP_TLV_ATM_SESSION_PARM:
+ case LDP_TLV_FR_SESSION_PARM:
+ case LDP_TLV_LABEL_REQUEST_MSG_ID:
+
+ default:
+ if (vflag <= 1)
+ print_unknown_data(tptr,"\n\t ",tlv_tlen);
+ break;
+ }
+ return(tlv_len+4); /* Type & Length fields not included */
+
+trunc:
+ printf("\n\t\t packet exceeded snapshot");
+ return 0;
+}
+
projects / tcpdump / blobdiff