Upgrade to tcpdump 4.9.0.
From CHANGES:
Wednesday January 18, 2017 devel.fx.lebail@orange.fr
Summary for 4.9.0 tcpdump release
General updates:
Improve separation frontend/backend (tcpdump/libnetdissect)
Don't require IPv6 library support in order to support IPv6 addresses
Introduce data types to use for integral values in packet structures
Fix display of timestamps with -tt, -ttt and -ttttt options
Fix some heap overflows found with American Fuzzy Lop by Hanno Boeck and others
(More information in the log with CVE-2016-* and CVE-2017-*)
Change the way protocols print link-layer addresses (Fix heap overflows
in CALM-FAST and GeoNetworking printers)
Pass correct caplen value to ether_print() and some other functions
Fix lookup_nsap() to match what isonsap_string() expects
Clean up relative time stamp printing (Fix an array overflow)
Fix some alignment issues with GCC on Solaris 10 SPARC
Add some ND_TTEST_/ND_TCHECK_ macros to simplify writing bounds checks
Add a fn_printztn() which returns the number of bytes processed
Add nd_init() and nd_cleanup() functions. Improve libsmi support
Add CONTRIBUTING file
Add a summary comment in all printers
Compile with more warning options in devel mode if supported (-Wcast-qual, ...)
Fix some leaks found by Valgrind/Memcheck
Fix a bunch of de-constifications
Squelch some Coverity warnings and some compiler warnings
Update Coverity and Travis-CI setup
Update Visual Studio files
Frontend:
Fix capsicum support to work with zerocopy buffers in bpf
Try opening interfaces by name first, then by name-as-index
Work around pcap_create() failures fetching time stamp type lists
Fix a segmentation fault with 'tcpdump -J'
Improve addrtostr6() bounds checking
Add exit_tcpdump() function
Don't drop CAP_SYS_CHROOT before chrooting
Fixes issue where statistics not reported when -G and -W options used
New printers supporting:
Generic Protocol Extension for VXLAN (VXLAN-GPE)
Home Networking Control Protocol (HNCP), RFCs 7787 and 7788
Locator/Identifier Separation Protocol (LISP), type 3 and type 4 packets
Marvell Extended Distributed Switch Architecture header (MEDSA)
Network Service Header (NSH)
REdis Serialization Protocol (RESP)
Updated printers:
802.11: Beginnings of 11ac radiotap support
802.11: Check the Protected bit for management frames
802.11: Do bounds checking on last_presentp before dereferencing it (Fix a heap overflow)
802.11: Fix the radiotap printer to handle the special bits correctly
802.11: If we have the MCS field, it's 11n
802.11: Only print unknown frame type or subtype messages once
802.11: Radiotap dBm values get printed as dB; Update a test output accordingly
802.11: Source and destination addresses were backwards
AH: Add a bounds check
AH: Report to our caller that dissection failed if a bounds check fails
AP1394: Print src > dst, not dst > src
ARP: Don't assume the target hardware address is <= 6 octets long (Fix a heap overflow)
ATALK: Add bounds and length checks (Fix heap overflows)
ATM: Add some bounds checks (Fix a heap overflow)
ATM: Fix an incorrect bounds check
BFD: Update specification from draft to RFC 5880
BFD: Update to print optional authentication field
BGP: Add decoding of ADD-PATH capability
BGP: Add support for the AIGP attribute (RFC7311)
BGP: Print LARGE_COMMUNITY Path Attribute
BGP: Update BGP numbers from IANA; Print minor values for FSM notification
BOOTP: Add a bounds check
Babel: Add decoder for source-specific extension
CDP: Filter out non-printable characters
CFM: Fixes to match the IEEE standard, additional bounds and length checks
CSLIP: Add more bounds checks (Fix a heap overflow)
ClassicalIPoATM: Add a bounds check on LLC+SNAP header (Fix a heap overflow)
DHCP: Fix MUDURL and TZ options
DHCPv6: Process MUDURL and TZ options
DHCPv6: Update Status Codes with RFCs/IANA names
DNS: Represent the "DNSSEC OK" bit as "DO" instead of "OK". Add a test case
DTP: Improve packet integrity checks
EGP: Fix bounds checks
ESP: Don't use OpenSSL_add_all_algorithms() in OpenSSL 1.1.0 or later
ESP: Handle OpenSSL 1.1.x
Ethernet: Add some bounds checking before calling isoclns_print (Fix a heap overflow)
Ethernet: Print the Length/Type field as length when needed
FDDI: Fix -e output for FDDI
FR: Add some packet-length checks and improve Q.933 printing (Fix heap overflows)
GRE: Add some bounds checks (Fix heap overflows)
Geneve: Fix error message with invalid option length; Update list option classes
HNCP: Fix incorrect time interval format. Fix handling of IPv4 prefixes
ICMP6: Fetch a 32-bit big-endian quantity with EXTRACT_32BITS()
ICMP6: dagid is always an IPv6 address, not an opaque 128-bit string
IGMP: Add a length check
IP: Add a bounds check (Fix a heap overflow)
IP: Check before fetching the protocol version (Fix a heap overflow)
IP: Don't try to dissect if IP version != 4 (Fix a heap overflow)
IP: Stop processing IPPROTO_ values once we hit IPPROTO_IPCOMP
IPComp: Check whether we have the CPI before we fetch it (Fix a heap overflow)
IPoFC: Fix -e output (IP-over-Fibre Channel)
IPv6: Don't overwrite the destination IPv6 address for routing headers
IPv6: Fix header printing
IPv6: Stop processing IPPROTO_ values once we hit IPPROTO_IPCOMP
ISAKMP: Clean up parsing of IKEv2 Security Associations
ISOCLNS/IS-IS: Add support for Purge Originator Identifier (RFC6232) and test cases
ISOCLNS/IS-IS: Don't overwrite packet data when checking the signature
ISOCLNS/IS-IS: Filter out non-printable characters
ISOCLNS/IS-IS: Fix segmentation faults
ISOCLNS/IS-IS: Have signature_verify() do the copying and clearing
ISOCLNS: Add some bounds checks
Juniper: Make sure a Juniper header TLV isn't bigger than what's left in the packet (Fix a heap overflow)
LLC/SNAP: With -e, print the LLC header before the SNAP header; without it, cut the SNAP header
LLC: Add a bounds check (Fix a heap overflow)
LLC: Clean up printing of LLC packets
LLC: Fix the printing of RFC 948-style IP packets
LLC: Skip the LLC and SNAP headers with -x for 802.11 and some other protocols
LLDP: Implement IANA OUI and LLDP MUD option
MPLS LSP ping: Update printing for RFC 4379, bug fixes, more bounds checks
MPLS: "length" is now the *remaining* packet length
MPLS: Add bounds and length checks (Fix a heap overflow)
NFS: Add a test that makes unaligned accesses
NFS: Don't assume the ONC RPC header is nicely aligned
NFS: Don't overflow the Opaque_Handle buffer (Fix a segmentation fault)
NFS: Don't run past the end of an NFSv3 file handle
OLSR: Add a test to cover a HNA sgw case
OLSR: Fix 'Advertised networks' count
OLSR: Fix printing of smart-gateway HNAs in IPv4
OSPF: Add a bounds check for the Hello packet options
OSPF: Do more bounds checking
OSPF: Fix a segmentation fault
OSPF: Fix printing 'ospf_topology_values' default
OTV: Add missing bounds checks
PGM: Print the formatted IP address, not the raw binary address, as a string
PIM: Add some bounds checking (Fix a heap overflow)
PIMv2: Fix checksumming of Register messages
PPI: Pass an adjusted struct pcap_pkthdr to the sub-printer
PPP: Add some bounds checks (Fix a heap overflow)
PPP: Report invalid PAP AACK/ANAK packets
Q.933: Add a missing bounds check
RADIUS: Add Value 13 "VLAN" to Tunnel-Type attribute
RADIUS: Filter out non-printable characters
RADIUS: Translate UDP/1700 as RADIUS
RESP: Do better checking of RESP packets
RPKI-RTR: Add a return value check for "fn_printn" call
RPKI-RTR: Remove printing when truncated condition already detected
RPL: Fix 'Consistency Check' control code
RPL: Fix suboption print
RSVP: An INTEGRITY object in a submessage covers only the submessage
RSVP: Fix an infinite loop; Add bounds and length checks
RSVP: Fix some if statements missing brackets
RSVP: Have signature_verify() do the copying and clearing
RTCP: Add some bounds checks
RTP: Add some bounds checks, fix two segmentation faults
SCTP: Do more bounds checking
SFLOW: Fix bounds checking
SLOW: Fix bugs, add checks
SMB: Before fetching the flags2 field, make sure we have it
SMB: Do bounds checks on NBNS resource types and resource data lengths
SNMP: Clean up the "have libsmi but no modules loaded" case
SNMP: Clean up the object abbreviation list and fix the code to match them
SNMP: Do bounds checks when printing character and octet strings
SNMP: Improve ASN.1 bounds checks
SNMP: More bounds and length checks
STP: Add a bunch of bounds checks, and fix some printing (Fix heap overflows)
STP: Filter out non-printable characters
TCP: Add bounds and length checks for packets with TCP option 20
TCP: Correct TCP option Kind value for TCP Auth and add SCPS-TP
TCP: Fix two bounds checks (Fix heap overflows)
TCP: Make sure we have the data offset field before fetching it (Fix a heap overflow)
TCP: Put TCP-AO option decoding right
TFTP: Don't use strchr() to scan packet data (Fix a heap overflow)
Telnet: Add some bounds checks
TokenRing: Fix -e output
UDLD: Fix an infinite loop
UDP: Add a bounds check (Fix a heap overflow)
UDP: Check against the packet length first
UDP: Don't do the DDP-over-UDP heuristic check up front
VAT: Add some bounds checks
VTP: Add a test on Mgmt Domain Name length
VTP: Add bounds checks and filter out non-printable characters
VXLAN: Add a bound check and a test case
ZeroMQ: Fix an infinite loop
Tuesday April 14, 2015 guy@alum.mit.edu
Summary for 4.8.0 tcpdump release
Fix "-x" for Apple PKTAP and PPI packets
Bug: N/A
Test: "adb shell tcpdump"
Change-Id: I81df72cf1ebdbe61c5b6069d8532ae817570f23f
diff --git a/print-lisp.c b/print-lisp.c
new file mode 100644
index 0000000..47afe50
--- /dev/null
+++ b/print-lisp.c
@@ -0,0 +1,449 @@
+/*
+ * Copyright (c) 2015 Ritesh Ranjan (r.ranjan789@gmail.com)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* \summary: - Locator/Identifier Separation Protocol (LISP) printer */
+
+/*
+ * specification: RFC 6830
+ *
+ *
+ * The Map-Register message format is:
+ *
+ * 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=3 |P|S|I|R| Reserved |M| Record Count |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Nonce . . . |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | . . . Nonce |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Key ID | Authentication Data Length |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * ~ Authentication Data ~
+ * +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | | Record TTL |
+ * | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * R | Locator Count | EID mask-len | ACT |A| Reserved |
+ * e +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * c | Rsvd | Map-Version Number | EID-Prefix-AFI |
+ * o +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * r | EID-Prefix |
+ * d +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | /| Priority | Weight | M Priority | M Weight |
+ * | L +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | o | Unused Flags |L|p|R| Loc-AFI |
+ * | c +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | \| Locator |
+ * +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ *
+ * The Map-Notify message format is:
+ *
+ * 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=4 |I|R| Reserved | Record Count |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Nonce . . . |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | . . . Nonce |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Key ID | Authentication Data Length |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * ~ Authentication Data ~
+ * +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | | Record TTL |
+ * | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * R | Locator Count | EID mask-len | ACT |A| Reserved |
+ * e +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * c | Rsvd | Map-Version Number | EID-Prefix-AFI |
+ * o +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * r | EID-Prefix |
+ * d +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | /| Priority | Weight | M Priority | M Weight |
+ * | L +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | o | Unused Flags |L|p|R| Loc-AFI |
+ * | c +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | \| Locator |
+ * +-> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <netdissect-stdinc.h>
+#include <netdissect.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "ip.h"
+#include "ip6.h"
+
+#include "extract.h"
+#include "addrtoname.h"
+
+static const char tstr[] = " [|LISP]";
+
+#define IPv4_AFI 1
+#define IPv6_AFI 2
+#define TYPE_INDEX 4
+#define LISP_MAP_NOTIFY_IBIT_MASK 8
+#define LISP_MAP_REGISTER_IBIT_MASK 2
+
+enum {
+ LISP_MAP_REQUEST = 1,
+ LISP_MAP_REPLY,
+ LISP_MAP_REGISTER,
+ LISP_MAP_NOTIFY,
+ LISP_ENCAPSULATED_CONTROL_MESSAGE = 8
+};
+
+enum {
+ LISP_AUTH_NONE,
+ LISP_AUTH_SHA1,
+ LISP_AUTH_SHA256
+};
+
+static const struct tok lisp_type [] = {
+ { 0, "LISP-Reserved" },
+ { 1, "LISP-Map-Request" },
+ { 2, "LISP-Map-Reply" },
+ { 3, "LISP-Map-Register" },
+ { 4, "LISP-Map-Notify" },
+ { 8, "LISP-Encapsulated-Contol-Message" },
+ { 0, NULL }
+};
+
+/*
+ * P-Bit : Request for Proxy Map-Reply from the MS/MR
+ * S-Bit : Security Enhancement. ETR is LISP-SEC enabled. draft-ietf-lisp-sec
+ * I-Bit : 128 bit xTR-ID and 64 bit Site-ID present.
+ * xTR-ID and Site-ID help in differentiation of xTRs in multi xTR
+ * and multi Site deployment scenarios.
+ * R-Bit : Built for a Reencapsulating-Tunnel-Router. Used in Traffic
+ * Engineering and Service Chaining
+ */
+static const struct tok map_register_hdr_flag[] = {
+ { 0x08000000, "P-Proxy-Map-Reply" },
+ { 0x04000000, "S-LISP-SEC-Capable" },
+ { 0x02000000, "I-xTR-ID-Present" },
+ { 0x01000000, "R-Build-For-RTR" },
+ { 0x00000100, "M-Want-Map-Notify" },
+ { 0, NULL }
+};
+
+static const struct tok map_notify_hdr_flag[] = {
+ { 0x08000000, "I-xTR-ID-Present" },
+ { 0x04000000, "R-Build-For-RTR" },
+ { 0, NULL }
+};
+
+static const struct tok auth_type[] = {
+ { LISP_AUTH_NONE, "None" },
+ { LISP_AUTH_SHA1, "SHA1" },
+ { LISP_AUTH_SHA256, "SHA256" },
+ { 0, NULL}
+};
+
+static const struct tok lisp_eid_action[] = {
+ { 0, "No-Action" },
+ { 1, "Natively-Forward" },
+ { 2, "Send-Map-Request" },
+ { 3, "Drop" },
+ { 0, NULL}
+};
+
+static const struct tok lisp_loc_flag[] = {
+ { 0x0004, "Local-Locator" },
+ { 0x0002, "RLoc-Probed" },
+ { 0x0001, "Reachable" },
+ { 0, NULL }
+};
+
+typedef struct map_register_hdr {
+ nd_uint8_t type_and_flag;
+ nd_uint8_t reserved;
+ nd_uint8_t reserved_and_flag2;
+ nd_uint8_t record_count;
+ nd_uint64_t nonce;
+ nd_uint16_t key_id;
+ nd_uint16_t auth_data_len;
+} lisp_map_register_hdr;
+
+#define MAP_REGISTER_HDR_LEN sizeof(lisp_map_register_hdr)
+
+typedef struct map_register_eid {
+ nd_uint32_t ttl;
+ nd_uint8_t locator_count;
+ nd_uint8_t eid_prefix_mask_length;
+ nd_uint8_t act_auth_inc_res;
+ nd_uint8_t reserved;
+ nd_uint8_t reserved_version_hi;
+ nd_uint8_t version_low;
+ nd_uint16_t eid_prefix_afi;
+} lisp_map_register_eid;
+
+#define MAP_REGISTER_EID_LEN sizeof(lisp_map_register_eid)
+
+typedef struct map_register_loc {
+ nd_uint8_t priority;
+ nd_uint8_t weight;
+ nd_uint8_t m_priority;
+ nd_uint8_t m_weight;
+ nd_uint16_t unused_and_flag;
+ nd_uint16_t locator_afi;
+} lisp_map_register_loc;
+
+#define MAP_REGISTER_LOC_LEN sizeof(lisp_map_register_loc)
+
+static inline uint8_t extract_lisp_type(uint8_t);
+static inline uint8_t is_xtr_data_present(uint8_t , uint8_t);
+static void lisp_hdr_flag(netdissect_options *, const lisp_map_register_hdr *);
+static void action_flag(netdissect_options *, uint8_t);
+static void loc_hdr_flag(netdissect_options *, uint16_t);
+
+void lisp_print(netdissect_options *ndo, const u_char *bp, u_int length)
+{
+ uint8_t type;
+ uint8_t mask_len;
+ uint8_t loc_count;
+ uint8_t xtr_present;
+ uint8_t record_count;
+ uint16_t key_id;
+ uint16_t eid_afi;
+ uint16_t loc_afi;
+ uint16_t map_version;
+ uint16_t packet_offset;
+ uint16_t auth_data_len;
+ uint32_t ttl;
+ const u_char *packet_iterator;
+ const u_char *loc_ip_pointer;
+ const lisp_map_register_hdr *lisp_hdr;
+ const lisp_map_register_eid *lisp_eid;
+ const lisp_map_register_loc *lisp_loc;
+
+ /* Check if enough bytes for header are available */
+ ND_TCHECK2(*bp, MAP_REGISTER_HDR_LEN);
+ lisp_hdr = (const lisp_map_register_hdr *) bp;
+ lisp_hdr_flag(ndo, lisp_hdr);
+ /* Supporting only MAP NOTIFY and MAP REGISTER LISP packets */
+ type = extract_lisp_type(lisp_hdr->type_and_flag);
+ if ((type != LISP_MAP_REGISTER) && (type != LISP_MAP_NOTIFY))
+ return;
+
+ /* Find if the packet contains xTR and Site-ID data */
+ xtr_present = is_xtr_data_present(type, lisp_hdr->type_and_flag);
+
+ /* Extract the number of EID records present */
+ auth_data_len = EXTRACT_16BITS(&lisp_hdr->auth_data_len);
+ packet_iterator = (const u_char *)(lisp_hdr);
+ packet_offset = MAP_REGISTER_HDR_LEN;
+ record_count = lisp_hdr->record_count;
+
+ if (ndo->ndo_vflag) {
+ key_id = EXTRACT_16BITS(&lisp_hdr->key_id);
+ ND_PRINT((ndo, "\n %u record(s), ", record_count));
+ ND_PRINT((ndo, "Authentication %s,",
+ tok2str(auth_type, "unknown-type", key_id)));
+ hex_print(ndo, "\n Authentication-Data: ", packet_iterator +
+ packet_offset, auth_data_len);
+ } else {
+ ND_PRINT((ndo, " %u record(s),", record_count));
+ }
+ packet_offset += auth_data_len;
+
+ if (record_count == 0)
+ goto invalid;
+
+ /* Print all the EID records */
+ while ((length > packet_offset) && (record_count--)) {
+
+ ND_TCHECK2(*(packet_iterator + packet_offset), MAP_REGISTER_EID_LEN);
+ ND_PRINT((ndo, "\n"));
+ lisp_eid = (const lisp_map_register_eid *)
+ ((const u_char *)lisp_hdr + packet_offset);
+ packet_offset += MAP_REGISTER_EID_LEN;
+ mask_len = lisp_eid->eid_prefix_mask_length;
+ eid_afi = EXTRACT_16BITS(&lisp_eid->eid_prefix_afi);
+ loc_count = lisp_eid->locator_count;
+
+ if (ndo->ndo_vflag) {
+ ttl = EXTRACT_32BITS(&lisp_eid->ttl);
+ ND_PRINT((ndo, " Record TTL %u,", ttl));
+ action_flag(ndo, lisp_eid->act_auth_inc_res);
+ map_version = (((lisp_eid->reserved_version_hi) & 15 ) * 255) +
+ lisp_eid->version_low;
+ ND_PRINT((ndo, " Map Version: %u,", map_version));
+ }
+
+ switch (eid_afi) {
+ case IPv4_AFI:
+ ND_TCHECK2(*(packet_iterator + packet_offset), 4);
+ ND_PRINT((ndo, " EID %s/%u,", ipaddr_string(ndo,
+ packet_iterator + packet_offset), mask_len));
+ packet_offset += 4;
+ break;
+ case IPv6_AFI:
+ ND_TCHECK2(*(packet_iterator + packet_offset), 16);
+ ND_PRINT((ndo, " EID %s/%u,", ip6addr_string(ndo,
+ packet_iterator + packet_offset), mask_len));
+ packet_offset += 16;
+ break;
+ default:
+ /*
+ * No support for LCAF right now.
+ */
+ return;
+ break;
+ }
+
+ ND_PRINT((ndo, " %u locator(s)", loc_count));
+
+ while (loc_count--) {
+ ND_TCHECK2(*(packet_iterator + packet_offset), MAP_REGISTER_LOC_LEN);
+ lisp_loc = (const lisp_map_register_loc *) (packet_iterator + packet_offset);
+ loc_ip_pointer = (const u_char *) (lisp_loc + 1);
+ packet_offset += MAP_REGISTER_LOC_LEN;
+ loc_afi = EXTRACT_16BITS(&lisp_loc->locator_afi);
+
+ if (ndo->ndo_vflag)
+ ND_PRINT((ndo, "\n "));
+
+ switch (loc_afi) {
+ case IPv4_AFI:
+ ND_TCHECK2(*(packet_iterator + packet_offset), 4);
+ ND_PRINT((ndo, " LOC %s", ipaddr_string(ndo, loc_ip_pointer)));
+ packet_offset += 4;
+ break;
+ case IPv6_AFI:
+ ND_TCHECK2(*(packet_iterator + packet_offset), 16);
+ ND_PRINT((ndo, " LOC %s", ip6addr_string(ndo, loc_ip_pointer)));
+ packet_offset += 16;
+ break;
+ default:
+ break;
+ }
+ if (ndo->ndo_vflag) {
+ ND_PRINT((ndo, "\n Priority/Weight %u/%u,"
+ " Multicast Priority/Weight %u/%u,",
+ lisp_loc->priority, lisp_loc->weight,
+ lisp_loc->m_priority, lisp_loc->m_weight));
+ loc_hdr_flag(ndo, EXTRACT_16BITS(&lisp_loc->unused_and_flag));
+ }
+ }
+ }
+
+ /*
+ * Print xTR and Site ID. Handle the fact that the packet could be invalid.
+ * If the xTR_ID_Present bit is not set, and we still have data to display,
+ * show it as hex data.
+ */
+ if (xtr_present) {
+ if (!ND_TTEST2(*(packet_iterator + packet_offset), 24))
+ goto invalid;
+ hex_print_with_offset(ndo, "\n xTR-ID: ", packet_iterator + packet_offset, 16, 0);
+ ND_PRINT((ndo, "\n SITE-ID: %" PRIu64,
+ EXTRACT_64BITS(packet_iterator + packet_offset + 16)));
+ } else {
+ /* Check if packet isn't over yet */
+ if (packet_iterator + packet_offset < ndo->ndo_snapend) {
+ hex_print_with_offset(ndo, "\n Data: ", packet_iterator + packet_offset,
+ (ndo->ndo_snapend - (packet_iterator + packet_offset)), 0);
+ }
+ }
+ return;
+trunc:
+ ND_PRINT((ndo, "\n %s", tstr));
+ return;
+invalid:
+ ND_PRINT((ndo, "\n %s", istr));
+ return;
+}
+
+static inline uint8_t extract_lisp_type(uint8_t lisp_hdr_flags)
+{
+ return (lisp_hdr_flags) >> TYPE_INDEX;
+}
+
+static inline uint8_t is_xtr_data_present(uint8_t type, uint8_t lisp_hdr_flags)
+{
+ uint8_t xtr_present = 0;
+
+ if (type == LISP_MAP_REGISTER)
+ xtr_present = (lisp_hdr_flags) & LISP_MAP_REGISTER_IBIT_MASK;
+ else if (type == LISP_MAP_NOTIFY)
+ xtr_present = (lisp_hdr_flags) & LISP_MAP_NOTIFY_IBIT_MASK;
+
+ return xtr_present;
+}
+
+static void lisp_hdr_flag(netdissect_options *ndo, const lisp_map_register_hdr *lisp_hdr)
+{
+ uint8_t type = extract_lisp_type(lisp_hdr->type_and_flag);
+
+ if (!ndo->ndo_vflag) {
+ ND_PRINT((ndo, "%s,", tok2str(lisp_type, "unknown-type-%u", type)));
+ return;
+ } else {
+ ND_PRINT((ndo, "%s,", tok2str(lisp_type, "unknown-type-%u", type)));
+ }
+
+ if (type == LISP_MAP_REGISTER) {
+ ND_PRINT((ndo, " flags [%s],", bittok2str(map_register_hdr_flag,
+ "none", EXTRACT_32BITS(lisp_hdr))));
+ } else if (type == LISP_MAP_NOTIFY) {
+ ND_PRINT((ndo, " flags [%s],", bittok2str(map_notify_hdr_flag,
+ "none", EXTRACT_32BITS(lisp_hdr))));
+ }
+
+ return;
+}
+
+static void action_flag(netdissect_options *ndo, uint8_t act_auth_inc_res)
+{
+ uint8_t action;
+ uint8_t authoritative;
+
+ authoritative = ((act_auth_inc_res >> 4) & 1);
+
+ if (authoritative)
+ ND_PRINT((ndo, " Authoritative,"));
+ else
+ ND_PRINT((ndo, " Non-Authoritative,"));
+
+ action = act_auth_inc_res >> 5;
+ ND_PRINT((ndo, " %s,", tok2str(lisp_eid_action, "unknown", action)));
+}
+
+static void loc_hdr_flag(netdissect_options *ndo, uint16_t flag)
+{
+ ND_PRINT((ndo, " flags [%s],", bittok2str(lisp_loc_flag, "none", flag)));
+}
+