/* * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that: (1) source code * distributions retain the above copyright notice and this paragraph * in its entirety, and (2) distributions including binary code include * the above copyright notice and this paragraph in its entirety in * the documentation or other materials provided with the distribution. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE. * * Original code by Hannes Gredler (hannes@gredler.at) */ #include #ifndef lint __RCSID("$NetBSD: print-lspping.c,v 1.11 2024/09/02 16:15:32 christos Exp $"); #endif /* \summary: MPLS LSP PING printer */ /* specification: RFC 4379 */ #include #include "netdissect-stdinc.h" #define ND_LONGJMP_FROM_TCHECK #include "netdissect.h" #include "extract.h" #include "addrtoname.h" #include "ntp.h" #include "l2vpn.h" #include "oui.h" /* * LSPPING common 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Version Number | Must Be Zero | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Message Type | Reply mode | Return Code | Return Subcode| * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Sender's Handle | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Sequence Number | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | TimeStamp Sent (seconds) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | TimeStamp Sent (microseconds) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | TimeStamp Received (seconds) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | TimeStamp Received (microseconds) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | TLVs ... | * . . * . . * . . */ struct lspping_common_header { nd_uint16_t version; nd_uint16_t global_flags; nd_uint8_t msg_type; nd_uint8_t reply_mode; nd_uint8_t return_code; nd_uint8_t return_subcode; nd_uint32_t sender_handle; nd_uint32_t seq_number; struct l_fixedpt ts_sent; struct l_fixedpt ts_rcvd; }; #define LSPPING_VERSION 1 static const struct tok lspping_msg_type_values[] = { { 1, "MPLS Echo Request"}, { 2, "MPLS Echo Reply"}, { 0, NULL} }; static const struct tok lspping_reply_mode_values[] = { { 1, "Do not reply"}, { 2, "Reply via an IPv4/IPv6 UDP packet"}, { 3, "Reply via an IPv4/IPv6 UDP packet with Router Alert"}, { 4, "Reply via application level control channel"}, { 0, NULL} }; static const struct tok lspping_return_code_values[] = { { 0, "No return code or return code contained in the Error Code TLV"}, { 1, "Malformed echo request received"}, { 2, "One or more of the TLVs was not understood"}, { 3, "Replying router is an egress for the FEC at stack depth"}, { 4, "Replying router has no mapping for the FEC at stack depth"}, { 5, "Reserved"}, { 6, "Reserved"}, { 7, "Reserved"}, { 8, "Label switched at stack-depth"}, { 9, "Label switched but no MPLS forwarding at stack-depth"}, { 10, "Mapping for this FEC is not the given label at stack depth"}, { 11, "No label entry at stack-depth"}, { 12, "Protocol not associated with interface at FEC stack depth"}, { 13, "Premature termination of ping due to label stack shrinking to a single label"}, { 0, NULL}, }; /* * LSPPING 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Type | Length | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Value | * . . * . . * . . * | | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ struct lspping_tlv_header { nd_uint16_t type; nd_uint16_t length; }; #define LSPPING_TLV_TARGET_FEC_STACK 1 #define LSPPING_TLV_DOWNSTREAM_MAPPING 2 #define LSPPING_TLV_PAD 3 /* not assigned 4 */ #define LSPPING_TLV_VENDOR_ENTERPRISE 5 #define LSPPING_TLV_VENDOR_ENTERPRISE_LEN 4 /* not assigned 6 */ #define LSPPING_TLV_INTERFACE_LABEL_STACK 7 /* not assigned 8 */ #define LSPPING_TLV_ERROR_CODE 9 #define LSPPING_TLV_REPLY_TOS_BYTE 10 #define LSPPING_TLV_BFD_DISCRIMINATOR 15 /* draft-ietf-bfd-mpls-02 */ #define LSPPING_TLV_BFD_DISCRIMINATOR_LEN 4 #define LSPPING_TLV_VENDOR_PRIVATE 0xfc00 static const struct tok lspping_tlv_values[] = { { LSPPING_TLV_TARGET_FEC_STACK, "Target FEC Stack" }, { LSPPING_TLV_DOWNSTREAM_MAPPING, "Downstream Mapping" }, { LSPPING_TLV_PAD, "Pad" }, { LSPPING_TLV_ERROR_CODE, "Error Code" }, { LSPPING_TLV_VENDOR_ENTERPRISE, "Vendor Enterprise Code" }, { LSPPING_TLV_INTERFACE_LABEL_STACK, "Interface Label Stack" }, { LSPPING_TLV_REPLY_TOS_BYTE, "Reply TOS Byte" }, { LSPPING_TLV_BFD_DISCRIMINATOR, "BFD Discriminator" }, { LSPPING_TLV_VENDOR_PRIVATE, "Vendor Private Code" }, { 0, NULL} }; #define LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV4 1 #define LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV6 2 #define LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV4 3 #define LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV6 4 /* not assigned 5 */ #define LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV4 6 #define LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV6 7 #define LSPPING_TLV_TARGETFEC_SUBTLV_L2VPN_ENDPT 8 #define LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW_OLD 9 #define LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW 10 #define LSPPING_TLV_TARGETFEC_SUBTLV_FEC_129_PW 11 #define LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV4 12 #define LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV6 13 #define LSPPING_TLV_TARGETFEC_SUBTLV_GENERIC_IPV4 14 #define LSPPING_TLV_TARGETFEC_SUBTLV_GENERIC_IPV6 15 #define LSPPING_TLV_TARGETFEC_SUBTLV_NIL_FEC 16 static const struct tok lspping_tlvtargetfec_subtlv_values[] = { { LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV4, "LDP IPv4 prefix"}, { LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV6, "LDP IPv6 prefix"}, { LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV4, "RSVP IPv4 Session Query"}, { LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV6, "RSVP IPv6 Session Query"}, { 5, "Reserved"}, { LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV4, "VPN IPv4 prefix"}, { LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV6, "VPN IPv6 prefix"}, { LSPPING_TLV_TARGETFEC_SUBTLV_L2VPN_ENDPT, "L2 VPN endpoint"}, { LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW_OLD, "FEC 128 pseudowire (old)"}, { LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW, "FEC 128 pseudowire"}, { LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV4, "BGP labeled IPv4 prefix"}, { LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV6, "BGP labeled IPv6 prefix"}, { 0, NULL} }; /* * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | IPv4 prefix | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Prefix Length | Must Be Zero | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ struct lspping_tlv_targetfec_subtlv_ldp_ipv4_t { nd_ipv4 prefix; nd_uint8_t prefix_len; }; /* * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | IPv6 prefix | * | (16 octets) | * | | * | | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Prefix Length | Must Be Zero | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ struct lspping_tlv_targetfec_subtlv_ldp_ipv6_t { nd_ipv6 prefix; nd_uint8_t prefix_len; }; /* * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | IPv4 tunnel end point address | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Must Be Zero | Tunnel ID | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Extended Tunnel ID | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | IPv4 tunnel sender address | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Must Be Zero | LSP ID | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ struct lspping_tlv_targetfec_subtlv_rsvp_ipv4_t { nd_ipv4 tunnel_endpoint; nd_byte res[2]; nd_uint16_t tunnel_id; nd_ipv4 extended_tunnel_id; nd_ipv4 tunnel_sender; nd_byte res2[2]; nd_uint16_t lsp_id; }; /* * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | IPv6 tunnel end point address | * | | * | | * | | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Must Be Zero | Tunnel ID | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Extended Tunnel ID | * | | * | | * | | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | IPv6 tunnel sender address | * | | * | | * | | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Must Be Zero | LSP ID | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ struct lspping_tlv_targetfec_subtlv_rsvp_ipv6_t { nd_ipv6 tunnel_endpoint; nd_byte res[2]; nd_uint16_t tunnel_id; nd_ipv6 extended_tunnel_id; nd_ipv6 tunnel_sender; nd_byte res2[2]; nd_uint16_t lsp_id; }; /* * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Route Distinguisher | * | (8 octets) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | IPv4 prefix | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Prefix Length | Must Be Zero | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ struct lspping_tlv_targetfec_subtlv_l3vpn_ipv4_t { nd_byte rd[8]; nd_ipv4 prefix; nd_uint8_t prefix_len; }; /* * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Route Distinguisher | * | (8 octets) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | IPv6 prefix | * | (16 octets) | * | | * | | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Prefix Length | Must Be Zero | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ struct lspping_tlv_targetfec_subtlv_l3vpn_ipv6_t { nd_byte rd[8]; nd_ipv6 prefix; nd_uint8_t prefix_len; }; /* * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Route Distinguisher | * | (8 octets) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Sender's VE ID | Receiver's VE ID | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Encapsulation Type | Must Be Zero | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * 0 1 2 3 */ struct lspping_tlv_targetfec_subtlv_l2vpn_endpt_t { nd_byte rd[8]; nd_uint16_t sender_ve_id; nd_uint16_t receiver_ve_id; nd_uint16_t encapsulation; }; /* * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Remote PE Address | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | PW ID | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | PW Type | Must Be Zero | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ struct lspping_tlv_targetfec_subtlv_fec_128_pw_old { nd_ipv4 remote_pe_address; nd_uint32_t pw_id; nd_uint16_t pw_type; }; /* * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Sender's PE Address | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Remote PE Address | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | PW ID | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | PW Type | Must Be Zero | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ struct lspping_tlv_targetfec_subtlv_fec_128_pw { nd_ipv4 sender_pe_address; nd_ipv4 remote_pe_address; nd_uint32_t pw_id; nd_uint16_t pw_type; }; /* * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | IPv4 prefix | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Prefix Length | Must Be Zero | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ struct lspping_tlv_targetfec_subtlv_bgp_ipv4_t { nd_ipv4 prefix; nd_uint8_t prefix_len; }; /* * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | IPv6 prefix | * | (16 octets) | * | | * | | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Prefix Length | Must Be Zero | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ struct lspping_tlv_targetfec_subtlv_bgp_ipv6_t { nd_ipv6 prefix; nd_uint8_t prefix_len; }; /* * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | MTU | Address Type | Resvd (SBZ) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Downstream IP Address (4 or 16 octets) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Downstream Interface Address (4 or 16 octets) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Multipath Type| Depth Limit | Multipath Length | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * . . * . (Multipath Information) . * . . * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Downstream Label | Protocol | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * . . * . . * . . * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Downstream Label | Protocol | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ /* Enough to get the address type */ struct lspping_tlv_downstream_map_t { nd_uint16_t mtu; nd_uint8_t address_type; nd_uint8_t ds_flags; }; struct lspping_tlv_downstream_map_ipv4_t { nd_uint16_t mtu; nd_uint8_t address_type; nd_uint8_t ds_flags; nd_ipv4 downstream_ip; nd_ipv4 downstream_interface; }; struct lspping_tlv_downstream_map_ipv4_unmb_t { nd_uint16_t mtu; nd_uint8_t address_type; nd_uint8_t ds_flags; nd_ipv4 downstream_ip; nd_uint32_t downstream_interface; }; struct lspping_tlv_downstream_map_ipv6_t { nd_uint16_t mtu; nd_uint8_t address_type; nd_uint8_t ds_flags; nd_ipv6 downstream_ip; nd_ipv6 downstream_interface; }; struct lspping_tlv_downstream_map_ipv6_unmb_t { nd_uint16_t mtu; nd_uint8_t address_type; nd_uint8_t ds_flags; nd_ipv6 downstream_ip; nd_uint32_t downstream_interface; }; struct lspping_tlv_downstream_map_info_t { nd_uint8_t multipath_type; nd_uint8_t depth_limit; nd_uint16_t multipath_length; }; #define LSPPING_AFI_IPV4 1 #define LSPPING_AFI_IPV4_UNMB 2 #define LSPPING_AFI_IPV6 3 #define LSPPING_AFI_IPV6_UNMB 4 static const struct tok lspping_tlv_downstream_addr_values[] = { { LSPPING_AFI_IPV4, "IPv4"}, { LSPPING_AFI_IPV4_UNMB, "Unnumbered IPv4"}, { LSPPING_AFI_IPV6, "IPv6"}, { LSPPING_AFI_IPV6_UNMB, "IPv6"}, { 0, NULL} }; void lspping_print(netdissect_options *ndo, const u_char *pptr, u_int len) { const struct lspping_common_header *lspping_com_header; const struct lspping_tlv_header *lspping_tlv_header; const struct lspping_tlv_header *lspping_subtlv_header; const u_char *tptr,*tlv_tptr,*subtlv_tptr; u_int return_code, return_subcode; u_int tlen,lspping_tlv_len,lspping_tlv_type,tlv_tlen; int tlv_hexdump,subtlv_hexdump; u_int lspping_subtlv_len,lspping_subtlv_type; uint32_t int_part, fraction; u_int address_type; union { const struct lspping_tlv_downstream_map_t *lspping_tlv_downstream_map; const struct lspping_tlv_downstream_map_ipv4_t *lspping_tlv_downstream_map_ipv4; const struct lspping_tlv_downstream_map_ipv4_unmb_t *lspping_tlv_downstream_map_ipv4_unmb; const struct lspping_tlv_downstream_map_ipv6_t *lspping_tlv_downstream_map_ipv6; const struct lspping_tlv_downstream_map_ipv6_unmb_t *lspping_tlv_downstream_map_ipv6_unmb; const struct lspping_tlv_downstream_map_info_t *lspping_tlv_downstream_map_info; } tlv_ptr; union { const struct lspping_tlv_targetfec_subtlv_ldp_ipv4_t *lspping_tlv_targetfec_subtlv_ldp_ipv4; const struct lspping_tlv_targetfec_subtlv_ldp_ipv6_t *lspping_tlv_targetfec_subtlv_ldp_ipv6; const struct lspping_tlv_targetfec_subtlv_rsvp_ipv4_t *lspping_tlv_targetfec_subtlv_rsvp_ipv4; const struct lspping_tlv_targetfec_subtlv_rsvp_ipv6_t *lspping_tlv_targetfec_subtlv_rsvp_ipv6; const struct lspping_tlv_targetfec_subtlv_l3vpn_ipv4_t *lspping_tlv_targetfec_subtlv_l3vpn_ipv4; const struct lspping_tlv_targetfec_subtlv_l3vpn_ipv6_t *lspping_tlv_targetfec_subtlv_l3vpn_ipv6; const struct lspping_tlv_targetfec_subtlv_l2vpn_endpt_t *lspping_tlv_targetfec_subtlv_l2vpn_endpt; const struct lspping_tlv_targetfec_subtlv_fec_128_pw_old *lspping_tlv_targetfec_subtlv_l2vpn_vcid_old; const struct lspping_tlv_targetfec_subtlv_fec_128_pw *lspping_tlv_targetfec_subtlv_l2vpn_vcid; const struct lspping_tlv_targetfec_subtlv_bgp_ipv4_t *lspping_tlv_targetfec_subtlv_bgp_ipv4; const struct lspping_tlv_targetfec_subtlv_bgp_ipv6_t *lspping_tlv_targetfec_subtlv_bgp_ipv6; } subtlv_ptr; ndo->ndo_protocol = "lspping"; tptr=pptr; lspping_com_header = (const struct lspping_common_header *)pptr; if (len < sizeof(struct lspping_common_header)) goto tooshort; ND_TCHECK_SIZE(lspping_com_header); /* * Sanity checking of the header. */ if (GET_BE_U_2(lspping_com_header->version) != LSPPING_VERSION) { ND_PRINT("LSP-PING version %u packet not supported", GET_BE_U_2(lspping_com_header->version)); return; } /* in non-verbose mode just lets print the basic Message Type*/ if (ndo->ndo_vflag < 1) { ND_PRINT("LSP-PINGv%u, %s, seq %u, length: %u", GET_BE_U_2(lspping_com_header->version), tok2str(lspping_msg_type_values, "unknown (%u)",GET_U_1(lspping_com_header->msg_type)), GET_BE_U_4(lspping_com_header->seq_number), len); return; } /* ok they seem to want to know everything - lets fully decode it */ tlen=len; ND_PRINT("\n\tLSP-PINGv%u, msg-type: %s (%u), length: %u\n\t reply-mode: %s (%u)", GET_BE_U_2(lspping_com_header->version), tok2str(lspping_msg_type_values, "unknown",GET_U_1(lspping_com_header->msg_type)), GET_U_1(lspping_com_header->msg_type), len, tok2str(lspping_reply_mode_values, "unknown",GET_U_1(lspping_com_header->reply_mode)), GET_U_1(lspping_com_header->reply_mode)); /* * the following return codes require that the subcode is attached * at the end of the translated token output */ return_code = GET_U_1(lspping_com_header->return_code); return_subcode = GET_U_1(lspping_com_header->return_subcode); if (return_code == 3 || return_code == 4 || return_code == 8 || return_code == 10 || return_code == 11 || return_code == 12 ) ND_PRINT("\n\t Return Code: %s %u (%u)\n\t Return Subcode: (%u)", tok2str(lspping_return_code_values, "unknown",return_code), return_subcode, return_code, return_subcode); else ND_PRINT("\n\t Return Code: %s (%u)\n\t Return Subcode: (%u)", tok2str(lspping_return_code_values, "unknown",return_code), return_code, return_subcode); ND_PRINT("\n\t Sender Handle: 0x%08x, Sequence: %u", GET_BE_U_4(lspping_com_header->sender_handle), GET_BE_U_4(lspping_com_header->seq_number)); ND_PRINT("\n\t Sender Timestamp: "); p_ntp_time(ndo, &lspping_com_header->ts_sent); ND_PRINT(" "); int_part=GET_BE_U_4(lspping_com_header->ts_rcvd.int_part); fraction=GET_BE_U_4(lspping_com_header->ts_rcvd.fraction); ND_PRINT("Receiver Timestamp: "); if (! (int_part == 0 && fraction == 0)) p_ntp_time(ndo, &lspping_com_header->ts_rcvd); else ND_PRINT("no timestamp"); tptr+=sizeof(struct lspping_common_header); tlen-=sizeof(struct lspping_common_header); while (tlen != 0) { /* Does the TLV go past the end of the packet? */ if (tlen < sizeof(struct lspping_tlv_header)) goto tooshort; lspping_tlv_header = (const struct lspping_tlv_header *)tptr; lspping_tlv_type=GET_BE_U_2(lspping_tlv_header->type); lspping_tlv_len=GET_BE_U_2(lspping_tlv_header->length); ND_PRINT("\n\t %s TLV (%u), length: %u", tok2str(lspping_tlv_values, "Unknown", lspping_tlv_type), lspping_tlv_type, lspping_tlv_len); /* some little sanity checking */ if (lspping_tlv_len == 0) { tptr+=sizeof(struct lspping_tlv_header); tlen-=sizeof(struct lspping_tlv_header); continue; /* no value to dissect */ } tlv_tptr=tptr+sizeof(struct lspping_tlv_header); tlv_tlen=lspping_tlv_len; /* header not included -> no adjustment */ /* Does the TLV go past the end of the packet? */ if (tlen < lspping_tlv_len+sizeof(struct lspping_tlv_header)) goto tooshort; /* did we capture enough for fully decoding the tlv ? */ ND_TCHECK_LEN(tlv_tptr, lspping_tlv_len); tlv_hexdump=FALSE; switch(lspping_tlv_type) { case LSPPING_TLV_TARGET_FEC_STACK: while (tlv_tlen != 0) { /* Does the subTLV header go past the end of the TLV? */ if (tlv_tlen < sizeof(struct lspping_tlv_header)) { ND_PRINT("\n\t TLV is too short"); tlv_hexdump = TRUE; goto tlv_tooshort; } subtlv_hexdump=FALSE; lspping_subtlv_header = (const struct lspping_tlv_header *)tlv_tptr; lspping_subtlv_type=GET_BE_U_2(lspping_subtlv_header->type); lspping_subtlv_len=GET_BE_U_2(lspping_subtlv_header->length); subtlv_tptr=tlv_tptr+sizeof(struct lspping_tlv_header); /* Does the subTLV go past the end of the TLV? */ if (tlv_tlen < lspping_subtlv_len+sizeof(struct lspping_tlv_header)) { ND_PRINT("\n\t TLV is too short"); tlv_hexdump = TRUE; goto tlv_tooshort; } /* Did we capture enough for fully decoding the subTLV? */ ND_TCHECK_LEN(subtlv_tptr, lspping_subtlv_len); ND_PRINT("\n\t %s subTLV (%u), length: %u", tok2str(lspping_tlvtargetfec_subtlv_values, "Unknown", lspping_subtlv_type), lspping_subtlv_type, lspping_subtlv_len); switch(lspping_subtlv_type) { case LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV4: /* Is the subTLV length correct? */ if (lspping_subtlv_len != 5) { ND_PRINT("\n\t invalid subTLV length, should be 5"); subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ } else { subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv4 = (const struct lspping_tlv_targetfec_subtlv_ldp_ipv4_t *)subtlv_tptr; ND_PRINT("\n\t %s/%u", GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv4->prefix), GET_U_1(subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv4->prefix_len)); } break; case LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV6: /* Is the subTLV length correct? */ if (lspping_subtlv_len != 17) { ND_PRINT("\n\t invalid subTLV length, should be 17"); subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ } else { subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv6 = (const struct lspping_tlv_targetfec_subtlv_ldp_ipv6_t *)subtlv_tptr; ND_PRINT("\n\t %s/%u", GET_IP6ADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv6->prefix), GET_U_1(subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv6->prefix_len)); } break; case LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV4: /* Is the subTLV length correct? */ if (lspping_subtlv_len != 5) { ND_PRINT("\n\t invalid subTLV length, should be 5"); subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ } else { subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv4 = (const struct lspping_tlv_targetfec_subtlv_bgp_ipv4_t *)subtlv_tptr; ND_PRINT("\n\t %s/%u", GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv4->prefix), GET_U_1(subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv4->prefix_len)); } break; case LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV6: /* Is the subTLV length correct? */ if (lspping_subtlv_len != 17) { ND_PRINT("\n\t invalid subTLV length, should be 17"); subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ } else { subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv6 = (const struct lspping_tlv_targetfec_subtlv_bgp_ipv6_t *)subtlv_tptr; ND_PRINT("\n\t %s/%u", GET_IP6ADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv6->prefix), GET_U_1(subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv6->prefix_len)); } break; case LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV4: /* Is the subTLV length correct? */ if (lspping_subtlv_len != 20) { ND_PRINT("\n\t invalid subTLV length, should be 20"); subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ } else { subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4 = (const struct lspping_tlv_targetfec_subtlv_rsvp_ipv4_t *)subtlv_tptr; ND_PRINT("\n\t tunnel end-point %s, tunnel sender %s, lsp-id 0x%04x" "\n\t tunnel-id 0x%04x, extended tunnel-id %s", GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->tunnel_endpoint), GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->tunnel_sender), GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->lsp_id), GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->tunnel_id), GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->extended_tunnel_id)); } break; case LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV6: /* Is the subTLV length correct? */ if (lspping_subtlv_len != 56) { ND_PRINT("\n\t invalid subTLV length, should be 56"); subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ } else { subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6 = (const struct lspping_tlv_targetfec_subtlv_rsvp_ipv6_t *)subtlv_tptr; ND_PRINT("\n\t tunnel end-point %s, tunnel sender %s, lsp-id 0x%04x" "\n\t tunnel-id 0x%04x, extended tunnel-id %s", GET_IP6ADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->tunnel_endpoint), GET_IP6ADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->tunnel_sender), GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->lsp_id), GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->tunnel_id), GET_IP6ADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->extended_tunnel_id)); } break; case LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV4: /* Is the subTLV length correct? */ if (lspping_subtlv_len != 13) { ND_PRINT("\n\t invalid subTLV length, should be 13"); subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ } else { subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv4 = (const struct lspping_tlv_targetfec_subtlv_l3vpn_ipv4_t *)subtlv_tptr; ND_PRINT("\n\t RD: %s, %s/%u", bgp_vpn_rd_print(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv4->rd), GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv4->prefix), GET_U_1(subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv4->prefix_len)); } break; case LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV6: /* Is the subTLV length correct? */ if (lspping_subtlv_len != 25) { ND_PRINT("\n\t invalid subTLV length, should be 25"); subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ } else { subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv6 = (const struct lspping_tlv_targetfec_subtlv_l3vpn_ipv6_t *)subtlv_tptr; ND_PRINT("\n\t RD: %s, %s/%u", bgp_vpn_rd_print(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv6->rd), GET_IP6ADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv6->prefix), GET_U_1(subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv6->prefix_len)); } break; case LSPPING_TLV_TARGETFEC_SUBTLV_L2VPN_ENDPT: /* Is the subTLV length correct? */ if (lspping_subtlv_len != 14) { ND_PRINT("\n\t invalid subTLV length, should be 14"); subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ } else { subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt = (const struct lspping_tlv_targetfec_subtlv_l2vpn_endpt_t *)subtlv_tptr; ND_PRINT("\n\t RD: %s, Sender VE ID: %u, Receiver VE ID: %u" "\n\t Encapsulation Type: %s (%u)", bgp_vpn_rd_print(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->rd), GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->sender_ve_id), GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->receiver_ve_id), tok2str(mpls_pw_types_values, "unknown", GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->encapsulation)), GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->encapsulation)); } break; /* the old L2VPN VCID subTLV does not have support for the sender field */ case LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW_OLD: /* Is the subTLV length correct? */ if (lspping_subtlv_len != 10) { ND_PRINT("\n\t invalid subTLV length, should be 10"); subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ } else { subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old = (const struct lspping_tlv_targetfec_subtlv_fec_128_pw_old *)subtlv_tptr; ND_PRINT("\n\t Remote PE: %s" "\n\t PW ID: 0x%08x, PW Type: %s (%u)", GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->remote_pe_address), GET_BE_U_4(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->pw_id), tok2str(mpls_pw_types_values, "unknown", GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->pw_type)), GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->pw_type)); } break; case LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW: /* Is the subTLV length correct? */ if (lspping_subtlv_len != 14) { ND_PRINT("\n\t invalid subTLV length, should be 14"); subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ } else { subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid = (const struct lspping_tlv_targetfec_subtlv_fec_128_pw *)subtlv_tptr; ND_PRINT("\n\t Sender PE: %s, Remote PE: %s" "\n\t PW ID: 0x%08x, PW Type: %s (%u)", GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->sender_pe_address), GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->remote_pe_address), GET_BE_U_4(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->pw_id), tok2str(mpls_pw_types_values, "unknown", GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->pw_type)), GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->pw_type)); } break; default: subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ break; } /* do we want to see an additionally subtlv hexdump ? */ if (ndo->ndo_vflag > 1 || subtlv_hexdump==TRUE) print_unknown_data(ndo, tlv_tptr+sizeof(struct lspping_tlv_header), "\n\t ", lspping_subtlv_len); /* All subTLVs are aligned to four octet boundary */ if (lspping_subtlv_len % 4) { lspping_subtlv_len += 4 - (lspping_subtlv_len % 4); /* Does the subTLV, including padding, go past the end of the TLV? */ if (tlv_tlen < lspping_subtlv_len+sizeof(struct lspping_tlv_header)) { ND_PRINT("\n\t\t TLV is too short"); return; } } tlv_tptr+=lspping_subtlv_len; tlv_tlen-=lspping_subtlv_len+sizeof(struct lspping_tlv_header); } break; case LSPPING_TLV_DOWNSTREAM_MAPPING: /* Does the header go past the end of the TLV? */ if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_t)) { ND_PRINT("\n\t TLV is too short"); tlv_hexdump = TRUE; goto tlv_tooshort; } /* Did we capture enough to get the address family? */ ND_TCHECK_LEN(tlv_tptr, sizeof(struct lspping_tlv_downstream_map_t)); tlv_ptr.lspping_tlv_downstream_map= (const struct lspping_tlv_downstream_map_t *)tlv_tptr; /* that strange thing with the downstream map TLV is that until now * we do not know if its IPv4 or IPv6 or is unnumbered; after * we find the address-type, we recast the tlv_tptr and move on. */ address_type = GET_U_1(tlv_ptr.lspping_tlv_downstream_map->address_type); ND_PRINT("\n\t MTU: %u, Address-Type: %s (%u)", GET_BE_U_2(tlv_ptr.lspping_tlv_downstream_map->mtu), tok2str(lspping_tlv_downstream_addr_values, "unknown", address_type), address_type); switch(address_type) { case LSPPING_AFI_IPV4: /* Does the data go past the end of the TLV? */ if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv4_t)) { ND_PRINT("\n\t TLV is too short"); tlv_hexdump = TRUE; goto tlv_tooshort; } /* Did we capture enough for this part of the TLV? */ ND_TCHECK_LEN(tlv_tptr, sizeof(struct lspping_tlv_downstream_map_ipv4_t)); tlv_ptr.lspping_tlv_downstream_map_ipv4= (const struct lspping_tlv_downstream_map_ipv4_t *)tlv_tptr; ND_PRINT("\n\t Downstream IP: %s" "\n\t Downstream Interface IP: %s", GET_IPADDR_STRING(tlv_ptr.lspping_tlv_downstream_map_ipv4->downstream_ip), GET_IPADDR_STRING(tlv_ptr.lspping_tlv_downstream_map_ipv4->downstream_interface)); tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv4_t); tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv4_t); break; case LSPPING_AFI_IPV4_UNMB: /* Does the data go past the end of the TLV? */ if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t)) { ND_PRINT("\n\t TLV is too short"); tlv_hexdump = TRUE; goto tlv_tooshort; } /* Did we capture enough for this part of the TLV? */ ND_TCHECK_LEN(tlv_tptr, sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t)); tlv_ptr.lspping_tlv_downstream_map_ipv4_unmb= (const struct lspping_tlv_downstream_map_ipv4_unmb_t *)tlv_tptr; ND_PRINT("\n\t Downstream IP: %s" "\n\t Downstream Interface Index: 0x%08x", GET_IPADDR_STRING(tlv_ptr.lspping_tlv_downstream_map_ipv4_unmb->downstream_ip), GET_BE_U_4(tlv_ptr.lspping_tlv_downstream_map_ipv4_unmb->downstream_interface)); tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t); tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t); break; case LSPPING_AFI_IPV6: /* Does the data go past the end of the TLV? */ if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv6_t)) { ND_PRINT("\n\t TLV is too short"); tlv_hexdump = TRUE; goto tlv_tooshort; } /* Did we capture enough for this part of the TLV? */ ND_TCHECK_LEN(tlv_tptr, sizeof(struct lspping_tlv_downstream_map_ipv6_t)); tlv_ptr.lspping_tlv_downstream_map_ipv6= (const struct lspping_tlv_downstream_map_ipv6_t *)tlv_tptr; ND_PRINT("\n\t Downstream IP: %s" "\n\t Downstream Interface IP: %s", GET_IP6ADDR_STRING(tlv_ptr.lspping_tlv_downstream_map_ipv6->downstream_ip), GET_IP6ADDR_STRING(tlv_ptr.lspping_tlv_downstream_map_ipv6->downstream_interface)); tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv6_t); tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv6_t); break; case LSPPING_AFI_IPV6_UNMB: /* Does the data go past the end of the TLV? */ if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t)) { ND_PRINT("\n\t TLV is too short"); tlv_hexdump = TRUE; goto tlv_tooshort; } /* Did we capture enough for this part of the TLV? */ ND_TCHECK_LEN(tlv_tptr, sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t)); tlv_ptr.lspping_tlv_downstream_map_ipv6_unmb= (const struct lspping_tlv_downstream_map_ipv6_unmb_t *)tlv_tptr; ND_PRINT("\n\t Downstream IP: %s" "\n\t Downstream Interface Index: 0x%08x", GET_IP6ADDR_STRING(tlv_ptr.lspping_tlv_downstream_map_ipv6_unmb->downstream_ip), GET_BE_U_4(tlv_ptr.lspping_tlv_downstream_map_ipv6_unmb->downstream_interface)); tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t); tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t); break; default: /* should not happen ! - no error message - tok2str() has barked already */ break; } /* Does the data go past the end of the TLV? */ if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_info_t)) { ND_PRINT("\n\t TLV is too short"); tlv_hexdump = TRUE; goto tlv_tooshort; } /* Did we capture enough for this part of the TLV? */ ND_TCHECK_LEN(tlv_tptr, sizeof(struct lspping_tlv_downstream_map_info_t)); tlv_ptr.lspping_tlv_downstream_map_info= (const struct lspping_tlv_downstream_map_info_t *)tlv_tptr; /* FIXME add hash-key type, depth limit, multipath processing */ /* FIXME print downstream labels */ tlv_hexdump=TRUE; /* dump the TLV until code complete */ break; case LSPPING_TLV_BFD_DISCRIMINATOR: if (tlv_tlen < LSPPING_TLV_BFD_DISCRIMINATOR_LEN) { ND_PRINT("\n\t TLV is too short"); tlv_hexdump = TRUE; goto tlv_tooshort; } else { ND_PRINT("\n\t BFD Discriminator 0x%08x", GET_BE_U_4(tlv_tptr)); } break; case LSPPING_TLV_VENDOR_ENTERPRISE: { uint32_t vendor_id; if (tlv_tlen < LSPPING_TLV_VENDOR_ENTERPRISE_LEN) { ND_PRINT("\n\t TLV is too short"); tlv_hexdump = TRUE; goto tlv_tooshort; } else { vendor_id = GET_BE_U_4(tlv_tptr); ND_PRINT("\n\t Vendor: %s (0x%04x)", tok2str(smi_values, "Unknown", vendor_id), vendor_id); } } break; /* * FIXME those are the defined TLVs that lack a decoder * you are welcome to contribute code ;-) */ case LSPPING_TLV_PAD: case LSPPING_TLV_ERROR_CODE: case LSPPING_TLV_VENDOR_PRIVATE: default: if (ndo->ndo_vflag <= 1) print_unknown_data(ndo, tlv_tptr, "\n\t ", tlv_tlen); break; } /* do we want to see an additionally tlv hexdump ? */ tlv_tooshort: if (ndo->ndo_vflag > 1 || tlv_hexdump==TRUE) print_unknown_data(ndo, tptr+sizeof(struct lspping_tlv_header), "\n\t ", lspping_tlv_len); /* All TLVs are aligned to four octet boundary */ if (lspping_tlv_len % 4) { lspping_tlv_len += (4 - lspping_tlv_len % 4); /* Does the TLV, including padding, go past the end of the packet? */ if (tlen < lspping_tlv_len+sizeof(struct lspping_tlv_header)) goto tooshort; } tptr+=lspping_tlv_len+sizeof(struct lspping_tlv_header); tlen-=lspping_tlv_len+sizeof(struct lspping_tlv_header); } return; tooshort: ND_PRINT("\n\t\t packet is too short"); }