forked from osmocom/wireshark
723 lines
28 KiB
C
723 lines
28 KiB
C
/* packet-lisp-tcp.c
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* Routines for Locator/ID Separation Protocol (LISP) TCP Control Message dissection
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* Copyright 2014, 2018 Lorand Jakab <ljakab@ac.upc.edu>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include "packet-tcp.h"
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#include "packet-lisp.h"
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#include <epan/to_str.h>
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#include <epan/afn.h>
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#include <epan/expert.h>
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void proto_register_lisp_tcp(void);
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void proto_reg_handoff_lisp_tcp(void);
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/*
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* See draft-kouvelas-lisp-map-server-reliable-transport-04 "LISP Map
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* Server Reliable Transport", and draft-kouvelas-lisp-rloc-membership-01
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* "LISP RLOC Membership Distribution" for packet format and protocol
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* information.
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*/
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#define LISP_MSG_HEADER_LEN 4
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#define LISP_MSG_END_MARKER 0x9FACADE9
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/* LISP Map Server Reliable Transport message types */
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#define TRANSPORT_BASE 16
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/* LISP RLOC Membership Distribution message types */
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#define MEMBERSHIP_BASE 22
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/* Registration refresh message flags */
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#define REFRESH_FLAG_R 0x8000
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static gboolean lisp_tcp_desegment = TRUE;
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/* Initialize the protocol and registered fields */
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static int proto_lisp_tcp = -1;
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static int hf_lisp_tcp_message_type = -1;
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static int hf_lisp_tcp_message_length = -1;
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static int hf_lisp_tcp_message_id = -1;
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static int hf_lisp_tcp_message_data = -1;
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static int hf_lisp_tcp_message_eid_afi = -1;
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static int hf_lisp_tcp_message_iid = -1;
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static int hf_lisp_tcp_message_sid = -1;
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static int hf_lisp_tcp_message_err = -1;
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static int hf_lisp_tcp_message_err_code = -1;
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static int hf_lisp_tcp_message_err_reserved = -1;
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static int hf_lisp_tcp_message_err_offending_msg_type = -1;
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static int hf_lisp_tcp_message_err_offending_msg_len = -1;
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static int hf_lisp_tcp_message_err_offending_msg_id = -1;
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static int hf_lisp_tcp_message_err_offending_msg_data = -1;
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static int hf_lisp_tcp_message_registration_reject_reason = -1;
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static int hf_lisp_tcp_message_registration_reject_res = -1;
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static int hf_lisp_tcp_message_registration_refresh_scope = -1;
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static int hf_lisp_tcp_message_registration_refresh_flags_rejected = -1;
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static int hf_lisp_tcp_message_registration_refresh_res = -1;
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static int hf_lisp_tcp_message_xtr_id = -1;
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static int hf_lisp_tcp_message_site_id = -1;
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static int hf_lisp_tcp_message_eid_prefix_length = -1;
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static int hf_lisp_tcp_message_eid_prefix_afi = -1;
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static int hf_lisp_tcp_message_eid_ipv4 = -1;
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static int hf_lisp_tcp_message_eid_ipv6 = -1;
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static int hf_lisp_tcp_message_eid_mac = -1;
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static int hf_lisp_tcp_message_eid_dn = -1;
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static int hf_lisp_tcp_message_rloc_afi = -1;
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static int hf_lisp_tcp_message_rloc_ipv4 = -1;
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static int hf_lisp_tcp_message_rloc_ipv6 = -1;
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static int hf_lisp_tcp_message_rid = -1;
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static int hf_lisp_tcp_message_end_marker = -1;
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/* Initialize the subtree pointers */
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static gint ett_lisp_tcp = -1;
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static gint ett_lisp_tcp_lcaf = -1;
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static gint ett_lisp_tcp_eid_prefix = -1;
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static gint ett_lisp_tcp_map_register = -1;
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/* Initialize expert fields */
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static expert_field ei_lisp_tcp_undecoded = EI_INIT;
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static expert_field ei_lisp_tcp_invalid_length = EI_INIT;
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static expert_field ei_lisp_tcp_invalid_marker = EI_INIT;
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static expert_field ei_lisp_tcp_unexpected_afi = EI_INIT;
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static dissector_handle_t lisp_tcp_handle;
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static const value_string lisp_tcp_typevals[] = {
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{ TRANSPORT_BASE, "Error Notification" },
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{ TRANSPORT_BASE + 1, "Registration" },
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{ TRANSPORT_BASE + 2, "Registration ACK" },
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{ TRANSPORT_BASE + 3, "Registration NACK" },
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{ TRANSPORT_BASE + 4, "Registration Refresh" },
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{ TRANSPORT_BASE + 5, "Mapping Notification" },
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{ MEMBERSHIP_BASE, "RLOC Membership Subscribe" },
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{ MEMBERSHIP_BASE + 1, "RLOC Membership Subscribe ACK" },
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{ MEMBERSHIP_BASE + 2, "RLOC Membership Subscribe NACK" },
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{ MEMBERSHIP_BASE + 3, "RLOC Membership Unsubscribe" },
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{ MEMBERSHIP_BASE + 4, "RLOC Membership Element Add" },
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{ MEMBERSHIP_BASE + 5, "RLOC Membership Element Remove" },
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{ MEMBERSHIP_BASE + 6, "RLOC Membership Refresh Request" },
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{ MEMBERSHIP_BASE + 7, "RLOC Membership Refresh Begin" },
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{ MEMBERSHIP_BASE + 8, "RLOC Membership Refresh End" },
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{ 0, NULL}
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};
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static const value_string lisp_tcp_membership_subscribe_errors[] = {
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{ 0, "Undefined" },
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{ 1, "Instance not found" },
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{ 2, "Distribution not enabled" },
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{ 3, "Not Authorized" },
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{ 0, NULL}
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};
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static const value_string lisp_tcp_registration_reject_reason[] = {
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{ 1, "Not a valid site EID prefix" },
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{ 2, "Authentication failure" },
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{ 3, "Locator set not allowed" },
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{ 4, "Reason not defined" },
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{ 0, NULL}
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};
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static const value_string lisp_tcp_registration_refresh_scope[] = {
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{ 0, "All prefixes under all address families under all EID instances" },
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{ 1, "All prefixes under all address families under a single EID instance" },
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{ 2, "All prefixes under a single address family under a single EID instance" },
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{ 3, "All prefixes covered by a specific EID prefix in a single EID instance" },
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{ 4, "A specific EID prefix in a single EID instance" },
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{ 0, NULL}
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};
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/*
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* Dissector for EID prefixes
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*/
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static guint
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dissect_lisp_tcp_message_eid_prefix(tvbuff_t *tvb, packet_info *pinfo, proto_tree *message_tree,
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guint offset, proto_item *tim)
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{
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proto_tree *prefix_tree, *lcaf_tree;
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gint str_len;
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guint8 prefix_length;
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guint16 prefix_afi, addr_len = 0;
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const gchar *prefix;
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prefix_length = tvb_get_guint8(tvb, offset);
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prefix_afi = tvb_get_ntohs(tvb, offset + 1);
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prefix = get_addr_str(pinfo->pool, tvb, offset + 3, prefix_afi, &addr_len);
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if (prefix == NULL) {
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expert_add_info_format(pinfo, message_tree, &ei_lisp_tcp_unexpected_afi,
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"Unexpected EID prefix AFI (%d), cannot decode", prefix_afi);
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return offset + addr_len;
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}
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proto_item_append_text(tim, " for %s/%d", prefix, prefix_length);
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prefix_tree = proto_tree_add_subtree_format(message_tree, tvb, offset, 3 + addr_len, ett_lisp_tcp_eid_prefix,
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NULL, "EID Prefix: %s/%d", prefix, prefix_length);
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/* Prefix-Length (1 byte) */
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proto_tree_add_item(prefix_tree, hf_lisp_tcp_message_eid_prefix_length, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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/* EID-Prefix-AFI (2 bytes) */
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proto_tree_add_item(prefix_tree, hf_lisp_tcp_message_eid_prefix_afi, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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/* EID-Prefix */
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switch(prefix_afi) {
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case AFNUM_INET:
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proto_tree_add_item(prefix_tree, hf_lisp_tcp_message_eid_ipv4, tvb, offset, INET_ADDRLEN, ENC_BIG_ENDIAN);
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offset += INET_ADDRLEN;
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break;
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case AFNUM_INET6:
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proto_tree_add_item(prefix_tree, hf_lisp_tcp_message_eid_ipv6, tvb, offset, INET6_ADDRLEN, ENC_NA);
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offset += INET6_ADDRLEN;
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break;
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case AFNUM_LCAF:
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lcaf_tree = proto_tree_add_subtree_format(prefix_tree, tvb, offset, addr_len, ett_lisp_tcp_lcaf, NULL, "Address: %s", prefix);
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dissect_lcaf(tvb, pinfo, lcaf_tree, offset, NULL);
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offset += addr_len;
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break;
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case AFNUM_802:
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case AFNUM_EUI48:
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proto_tree_add_item(prefix_tree, hf_lisp_tcp_message_eid_mac, tvb, offset, EUI48_ADDRLEN, ENC_NA);
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offset += EUI48_ADDRLEN;
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break;
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case AFNUM_DISTNAME:
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str_len = tvb_strsize(tvb, offset);
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proto_tree_add_item(prefix_tree, hf_lisp_tcp_message_eid_dn, tvb, offset, str_len, ENC_ASCII);
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offset += str_len;
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break;
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}
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return offset;
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}
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/*
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* Dissector for Reliable Transport messages
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*/
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static guint
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dissect_lisp_tcp_reliable_transport_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *message_tree,
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guint offset, guint16 type, guint16 data_len, proto_item *tim)
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{
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guint initial_offset = offset;
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proto_tree *map_register_tree;
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guint8 reject_reason, scope, err;
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guint16 refresh_flags, offending_msg_type;
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switch (type) {
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/* Error Notification */
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case TRANSPORT_BASE:
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/* Error code (1 byte) */
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err = tvb_get_guint8(tvb, offset);
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_err_code, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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data_len -= 1;
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proto_item_append_text(tim, ", Code: %d", err);
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/* Reserved (3 bytes) */
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_err_reserved, tvb, offset, 3, ENC_BIG_ENDIAN);
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offset += 3;
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data_len -= 3;
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/* Offending message type (2 bytes) */
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offending_msg_type = tvb_get_ntohs(tvb, offset);
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_err_offending_msg_type, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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data_len -= 2;
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proto_item_append_text(tim, ", Offending message type: %s",
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val_to_str(offending_msg_type, lisp_tcp_typevals, "Unknown type (%u)"));
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/* Offending message length (2 bytes) */
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_err_offending_msg_len, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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data_len -= 2;
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/* Offending message ID (4 bytes) */
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_err_offending_msg_id, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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data_len -= 4;
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/* Offending message data */
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if (data_len) {
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_err_offending_msg_data, tvb, offset, data_len, ENC_NA);
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offset += data_len;
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}
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return offset;
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/* Registration */
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case TRANSPORT_BASE + 1:
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/* Map-Register */
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map_register_tree = proto_tree_add_subtree(message_tree, tvb, offset, data_len,
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ett_lisp_tcp_map_register, NULL, "Map-Register");
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offset = dissect_lisp_map_register(tvb, pinfo, map_register_tree, offset, tim, FALSE);
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data_len -= offset - initial_offset;
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break;
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/* Registration ACK */
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case TRANSPORT_BASE + 2:
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/* EID */
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offset = dissect_lisp_tcp_message_eid_prefix(tvb, pinfo, message_tree, offset, tim);
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data_len -= offset - initial_offset;
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break;
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/* Registration Reject */
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case TRANSPORT_BASE + 3:
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/* Reason (1 byte) */
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reject_reason = tvb_get_guint8(tvb, offset);
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_registration_reject_reason, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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proto_item_append_text(tim, ", Reason: %s",
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val_to_str(reject_reason, lisp_tcp_registration_reject_reason, "Unknown reason code (%u)"));
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/* Reserved (2 bytes) */
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_registration_reject_res, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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/* EID */
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offset = dissect_lisp_tcp_message_eid_prefix(tvb, pinfo, message_tree, offset, tim);
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data_len -= offset - initial_offset;
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break;
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/* Registration Refresh */
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case TRANSPORT_BASE + 4:
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/* Reason (1 byte) */
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scope = tvb_get_guint8(tvb, offset);
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_registration_refresh_scope, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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proto_item_append_text(tim, ", Scope: %s",
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val_to_str(scope, lisp_tcp_registration_refresh_scope, "Unknown scope code (%u)"));
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col_append_fstr(pinfo->cinfo, COL_INFO, ", Scope: %d", scope);
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/* Rejected only flag (1 bit) */
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refresh_flags = tvb_get_ntohs(tvb, offset);
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_registration_refresh_flags_rejected, tvb, offset, 2, ENC_BIG_ENDIAN);
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if (refresh_flags & REFRESH_FLAG_R) {
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proto_item_append_text(tim, " (rejected only)");
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col_append_fstr(pinfo->cinfo, COL_INFO, " (rejected only)");
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}
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/* Reserved (15 bits) */
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_registration_refresh_res, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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if (scope == 0) {
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data_len -= 3;
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break;
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}
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/* EID */
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offset = dissect_lisp_tcp_message_eid_prefix(tvb, pinfo, message_tree, offset, tim);
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data_len -= offset - initial_offset;
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break;
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/* Mapping Notification */
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case TRANSPORT_BASE + 5:
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/* xTR-ID (16 bytes) */
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_xtr_id, tvb, offset, LISP_XTRID_LEN, ENC_NA);
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offset += LISP_XTRID_LEN;
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/* Site-ID (8 bytes) */
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_site_id, tvb, offset, LISP_SITEID_LEN, ENC_NA);
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offset += LISP_SITEID_LEN;
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/* Mapping Record */
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offset = dissect_lisp_mapping(tvb, pinfo, message_tree, 0, 1, FALSE, offset, tim);
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data_len -= offset - initial_offset;
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break;
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}
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if (data_len) {
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_data, tvb, offset, data_len, ENC_NA);
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offset += data_len;
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expert_add_info_format(pinfo, message_tree, &ei_lisp_tcp_undecoded, "Work-in-progress");
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}
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return offset;
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}
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/*
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* Dissector for Membership messages
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*/
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static guint
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dissect_lisp_tcp_membership_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *message_tree,
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guint offset, guint16 type, guint16 data_len, proto_item *tim)
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{
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guint32 iid, sid, rid;
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guint8 err;
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guint64 siteid;
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guint16 afi;
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/* EID AFI (2 bytes) */
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_eid_afi, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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data_len -= 2;
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/* Instance ID (4 bytes) */
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iid = tvb_get_ntohl(tvb, offset);
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_iid, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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data_len -= 4;
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proto_item_append_text(tim, ", IID: %u", iid);
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switch (type) {
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case MEMBERSHIP_BASE + 1:
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case MEMBERSHIP_BASE + 2:
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/* Subscribe ID (4 bytes) */
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sid = tvb_get_ntohl(tvb, offset);
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_sid, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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data_len -= 4;
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col_append_fstr(pinfo->cinfo, COL_INFO, ", Sub ID: %u", sid);
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proto_item_append_text(tim, ", Sub ID: %u", sid);
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if (type == MEMBERSHIP_BASE + 2) {
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/* Error code (1 byte) */
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err = tvb_get_guint8(tvb, offset);
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_err, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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data_len -= 1;
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proto_item_append_text(tim, ", Error code: %s",
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val_to_str(err, lisp_tcp_membership_subscribe_errors, "Unknown error code (%u)"));
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}
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break;
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case MEMBERSHIP_BASE + 4:
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case MEMBERSHIP_BASE + 5:
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/* Site ID (8 bytes) */
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siteid = tvb_get_ntoh64(tvb, offset);
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_site_id, tvb, offset, LISP_SITEID_LEN, ENC_NA);
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offset += 8;
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data_len -= 8;
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proto_item_append_text(tim, ", Site-ID: %"PRIu64, siteid);
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/* RLOC AFI (2 bytes) */
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afi = tvb_get_ntohs(tvb, offset);
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proto_tree_add_item(message_tree, hf_lisp_tcp_message_rloc_afi, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
|
|
data_len -= 2;
|
|
|
|
switch (afi) {
|
|
case AFNUM_INET:
|
|
proto_tree_add_item(message_tree, hf_lisp_tcp_message_rloc_ipv4, tvb, offset, INET_ADDRLEN, ENC_NA);
|
|
proto_item_append_text(tim, ", RLOC: %s", tvb_ip_to_str(pinfo->pool, tvb, offset));
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " [%u] %s", iid, tvb_ip_to_str(pinfo->pool, tvb, offset));
|
|
offset += INET_ADDRLEN;
|
|
data_len -= INET_ADDRLEN;
|
|
break;
|
|
case AFNUM_INET6:
|
|
proto_tree_add_item(message_tree, hf_lisp_tcp_message_rloc_ipv6, tvb, offset, INET6_ADDRLEN, ENC_NA);
|
|
proto_item_append_text(tim, ", RLOC: %s", tvb_ip6_to_str(pinfo->pool, tvb, offset));
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " [%u] %s", iid, tvb_ip6_to_str(pinfo->pool, tvb, offset));
|
|
offset += INET6_ADDRLEN;
|
|
data_len -= INET6_ADDRLEN;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
case MEMBERSHIP_BASE + 7:
|
|
case MEMBERSHIP_BASE + 8:
|
|
/* Request ID (4 bytes) */
|
|
rid = tvb_get_ntohl(tvb, offset);
|
|
proto_tree_add_item(message_tree, hf_lisp_tcp_message_rid, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
data_len -= 4;
|
|
proto_item_append_text(tim, ", Req ID: %u", rid);
|
|
break;
|
|
}
|
|
|
|
if (data_len) {
|
|
proto_tree_add_item(message_tree, hf_lisp_tcp_message_data, tvb, offset, data_len, ENC_NA);
|
|
offset += data_len;
|
|
expert_add_info_format(pinfo, message_tree, &ei_lisp_tcp_undecoded, "Work-in-progress");
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
|
|
/*
|
|
* Dissector for individual messages
|
|
*/
|
|
|
|
static int
|
|
dissect_lisp_tcp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
guint offset = 0;
|
|
guint16 type, len, data_len;
|
|
guint32 id, marker;
|
|
proto_item *tim, *til, *tiem;
|
|
proto_tree *message_tree;
|
|
|
|
tim = proto_tree_add_item(tree, proto_lisp_tcp, tvb, offset, -1, ENC_NA);
|
|
message_tree = proto_item_add_subtree(tim, ett_lisp_tcp);
|
|
|
|
/* Message type (2 bytes) */
|
|
type = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_item(message_tree, hf_lisp_tcp_message_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
/* Message length (2 bytes) */
|
|
len = tvb_get_ntohs(tvb, offset);
|
|
til = proto_tree_add_item(message_tree, hf_lisp_tcp_message_length, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
if (len < 8) {
|
|
expert_add_info_format(pinfo, til, &ei_lisp_tcp_invalid_length,
|
|
"Invalid message length (%u < 8)", len);
|
|
} else if (len > 8) {
|
|
/* Message ID (4 bytes) */
|
|
id = tvb_get_ntohl(tvb, offset);
|
|
proto_tree_add_item(message_tree, hf_lisp_tcp_message_id, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
col_append_sep_fstr(pinfo->cinfo, COL_INFO, "; ", "Msg: %u, %s", id, val_to_str(type, lisp_tcp_typevals,
|
|
"Unknown type (%u)"));
|
|
proto_item_append_text(tim, ", Msg: %u, %s", id, val_to_str(type, lisp_tcp_typevals,
|
|
"Unknown type (%u)"));
|
|
proto_item_set_len(tim, len);
|
|
|
|
data_len = len - 12;
|
|
if (type >= TRANSPORT_BASE && type <= TRANSPORT_BASE + 5) {
|
|
/* Map Server reliable transport message types */
|
|
offset = dissect_lisp_tcp_reliable_transport_message(tvb, pinfo, message_tree, offset, type, data_len, tim);
|
|
} else if (type >= MEMBERSHIP_BASE && type <= MEMBERSHIP_BASE + 8) {
|
|
/* EID instance membership message types */
|
|
offset = dissect_lisp_tcp_membership_message(tvb, pinfo, message_tree, offset, type, data_len, tim);
|
|
} else {
|
|
/* Message Data (variable length) */
|
|
proto_tree_add_item(message_tree, hf_lisp_tcp_message_data, tvb, offset, data_len, ENC_NA);
|
|
offset += data_len;
|
|
}
|
|
}
|
|
|
|
/* Message End Marker (4 bytes) */
|
|
marker = tvb_get_ntohl(tvb, offset);
|
|
tiem = proto_tree_add_item(message_tree, hf_lisp_tcp_message_end_marker, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
offset += 4;
|
|
|
|
if (marker != LISP_MSG_END_MARKER) {
|
|
expert_add_info_format(pinfo, tiem, &ei_lisp_tcp_invalid_marker,
|
|
"Invalid message end marker (0x%08x)", marker);
|
|
} else {
|
|
proto_item_append_text(tiem, " (correct)");
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
|
|
/*
|
|
* Get message length, needed by tcp_dissect_pdus()
|
|
*/
|
|
|
|
static guint
|
|
get_lisp_tcp_message_len(packet_info *pinfo _U_, tvbuff_t *tvb,
|
|
int offset, void *data _U_)
|
|
{
|
|
guint16 mlen;
|
|
|
|
/* Get length of memebership message */
|
|
mlen = tvb_get_ntohs(tvb, offset + 2);
|
|
|
|
return mlen;
|
|
}
|
|
|
|
|
|
/*
|
|
* Main dissector code
|
|
*/
|
|
|
|
static int
|
|
dissect_lisp_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
/* Clear Info column before fetching data in case an exception is thrown */
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
/* Make entries in Protocol column and Info column on summary display */
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "LISP");
|
|
|
|
/* Reassemble and dissect PDUs */
|
|
tcp_dissect_pdus(tvb, pinfo, tree, lisp_tcp_desegment, LISP_MSG_HEADER_LEN,
|
|
get_lisp_tcp_message_len, dissect_lisp_tcp_message, data);
|
|
|
|
/* Return the amount of data this dissector was able to dissect */
|
|
return tvb_reported_length(tvb);
|
|
}
|
|
|
|
|
|
/*
|
|
* Register the LISP protocol with Wireshark
|
|
*/
|
|
|
|
void
|
|
proto_register_lisp_tcp(void)
|
|
{
|
|
/* Setup list of header fields */
|
|
static hf_register_info hf[] = {
|
|
{ &hf_lisp_tcp_message_type,
|
|
{ "Type", "lisp-tcp.message.type",
|
|
FT_UINT16, BASE_DEC, VALS(lisp_tcp_typevals), 0x0, "TLV Message Type", HFILL }},
|
|
{ &hf_lisp_tcp_message_length,
|
|
{ "Length", "lisp-tcp.message.length",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0, "TLV Message Length", HFILL }},
|
|
{ &hf_lisp_tcp_message_id,
|
|
{ "Message ID", "lisp-tcp.message.id",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_data,
|
|
{ "Message Data", "lisp-tcp.message.data",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_eid_afi,
|
|
{ "EID AFI", "lisp-tcp.message.eid.afi",
|
|
FT_UINT16, BASE_DEC, VALS(afn_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_iid,
|
|
{ "Instance ID", "lisp-tcp.message.iid",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_sid,
|
|
{ "Subscribe Message ID", "lisp-tcp.message.sid",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_err,
|
|
{ "Error code", "lisp-tcp.message.err",
|
|
FT_UINT8, BASE_DEC, VALS(lisp_tcp_membership_subscribe_errors), 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_err_code,
|
|
{ "Error code", "lisp-tcp.message.err.code",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_err_reserved,
|
|
{ "Error code", "lisp-tcp.message.err.reserved",
|
|
FT_UINT24, BASE_HEX, NULL, 0x0, "Must be zero", HFILL }},
|
|
{ &hf_lisp_tcp_message_err_offending_msg_type,
|
|
{ "Offending message type", "lisp-tcp.message.err.offending_msg.type",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_err_offending_msg_len,
|
|
{ "Offending message length", "lisp-tcp.message.err.offending_msg.len",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_err_offending_msg_id,
|
|
{ "Offending message ID", "lisp-tcp.message.err.offending_msg.id",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_err_offending_msg_data,
|
|
{ "Offending message data", "lisp-tcp.message.err.offending_msg.data",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_registration_reject_reason,
|
|
{ "Registration reject reason", "lisp-tcp.message.registration_reject.reason",
|
|
FT_UINT8, BASE_DEC, VALS(lisp_tcp_registration_reject_reason), 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_registration_reject_res,
|
|
{ "Reserved bits", "lisp-tcp.message.registration_reject.res",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, "Must be zero", HFILL }},
|
|
{ &hf_lisp_tcp_message_registration_refresh_scope,
|
|
{ "Registration refresh scope", "lisp-tcp.message.registration_refresh.scope",
|
|
FT_UINT8, BASE_DEC, VALS(lisp_tcp_registration_refresh_scope), 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_registration_refresh_flags_rejected,
|
|
{ "Rejected only", "lisp-tcp.message.registration_refresh.flags.rejected",
|
|
FT_BOOLEAN, 16, TFS(&tfs_set_notset), REFRESH_FLAG_R, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_registration_refresh_res,
|
|
{ "Reserved", "lisp-tcp.message.registration_refresh.res",
|
|
FT_UINT16, BASE_HEX, NULL, 0x7FFF, "Must be zero", HFILL }},
|
|
{ &hf_lisp_tcp_message_xtr_id,
|
|
{ "xTR-ID", "lisp-tcp.message.xtrid",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_site_id,
|
|
{ "Site-ID", "lisp-tcp.message.siteid",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_eid_prefix_length,
|
|
{ "Prefix Length", "lisp-tcp.message.eid.prefix.length",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_eid_prefix_afi,
|
|
{ "Prefix AFI", "lisp-tcp.message.eid.prefix.afi",
|
|
FT_UINT16, BASE_DEC, VALS(afn_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_eid_ipv4,
|
|
{ "Address", "lisp-tcp.message.eid.ipv4",
|
|
FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_eid_ipv6,
|
|
{ "Address", "lisp-tcp.message.eid.ipv6",
|
|
FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_eid_mac,
|
|
{ "Address", "lisp-tcp.message.eid.mac",
|
|
FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_eid_dn,
|
|
{ "Address", "lisp-tcp.message.eid.dn",
|
|
FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_rloc_afi,
|
|
{ "RLOC AFI", "lisp-tcp.message.rloc.afi",
|
|
FT_UINT16, BASE_DEC, VALS(afn_vals), 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_rloc_ipv4,
|
|
{ "RLOC", "lisp-tcp.message.rloc.ipv4",
|
|
FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_rloc_ipv6,
|
|
{ "RLOC", "lisp-tcp.message.rloc.ipv6",
|
|
FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_rid,
|
|
{ "Request Message ID", "lisp-tcp.message.rid",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_lisp_tcp_message_end_marker,
|
|
{ "Message End Marker", "lisp-tcp.message.end_marker",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_lisp_tcp,
|
|
&ett_lisp_tcp_lcaf,
|
|
&ett_lisp_tcp_eid_prefix,
|
|
&ett_lisp_tcp_map_register
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_lisp_tcp_undecoded, { "lisp-tcp.undecoded", PI_UNDECODED, PI_WARN, "Not dissected yet (report to wireshark.org)", EXPFILL }},
|
|
{ &ei_lisp_tcp_invalid_length, { "lisp-tcp.invalid_length", PI_PROTOCOL, PI_ERROR, "Invalid message length", EXPFILL }},
|
|
{ &ei_lisp_tcp_invalid_marker, { "lisp-tcp.invalid_marker", PI_PROTOCOL, PI_ERROR, "Invalid message end marker", EXPFILL }},
|
|
{ &ei_lisp_tcp_unexpected_afi, { "lisp-tcp.unexpected_afi", PI_PROTOCOL, PI_ERROR, "Unexpected AFI", EXPFILL }},
|
|
};
|
|
|
|
expert_module_t* expert_lisp_tcp;
|
|
|
|
/* Register the protocol name and description */
|
|
proto_lisp_tcp = proto_register_protocol("Locator/ID Separation Protocol (Reliable Transport)",
|
|
"LISP Reliable Transport", "lisp-tcp");
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
proto_register_field_array(proto_lisp_tcp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
expert_lisp_tcp = expert_register_protocol(proto_lisp_tcp);
|
|
expert_register_field_array(expert_lisp_tcp, ei, array_length(ei));
|
|
|
|
/* Register dissector so that other dissectors can call it */
|
|
lisp_tcp_handle = register_dissector("lisp-tcp", dissect_lisp_tcp, proto_lisp_tcp);
|
|
}
|
|
|
|
|
|
/*
|
|
* Simple form of proto_reg_handoff_lisp_tcp which can be used if there are
|
|
* no prefs-dependent registration function calls.
|
|
*/
|
|
|
|
void
|
|
proto_reg_handoff_lisp_tcp(void)
|
|
{
|
|
dissector_add_uint_with_preference("tcp.port", LISP_CONTROL_PORT, lisp_tcp_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - https://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|