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Diffstat (limited to 'epan/dissectors/packet-dlep.c')
| -rw-r--r-- | epan/dissectors/packet-dlep.c | 1366 |
1 files changed, 1366 insertions, 0 deletions
diff --git a/epan/dissectors/packet-dlep.c b/epan/dissectors/packet-dlep.c new file mode 100644 index 00000000..af5e7809 --- /dev/null +++ b/epan/dissectors/packet-dlep.c @@ -0,0 +1,1366 @@ +/* packet-dlep.c + * Routines for DLEP protocol packet disassembly + * + * Copyright (C) 2019 Massachusetts Institute of Technology + * + * Original code from https://github.com/mit-ll/dlep-wireshark-dissector + * Original Author: Jeffrey Wildman <jeffrey.wildman@ll.mit.edu> + * + * Extended and supplemented by Uli Heilmeier <uh@heilmeier.eu>, 2020 + * Extended by: + * RFC 8757 Latency Range Extension + * RFC 8629 Multi-Hop Forwarding Extension + * RFC 8703 Link Identifier Extension + * TODO: Decoding of RFC 8651 Control-Plane-Based Pause Extension needs to be implemented + * + * SPDX-License-Identifier: MIT + * + */ + +#include "config.h" + +#include <epan/ftypes/ftypes.h> /* for fieldtype lengths */ +#include <epan/exceptions.h> +#include <epan/expert.h> +#include <epan/ipproto.h> /* for IP_PROTO_TCP and IP_PROTO_UDP */ +#include <epan/packet.h> +#include <epan/packet_info.h> /* for struct packet_info */ +#include <epan/prefs.h> +#include <epan/tvbuff.h> +#include <epan/to_str.h> +#include <epan/tfs.h> + +#include "packet-tcp.h" + +/* Section 13: DLEP Data Items */ + +/* DLEP Data Item Lengths (bytes) */ +#define DLEP_DIT_STATUS_MINLEN 1 /* variable length */ +#define DLEP_DIT_V4CONN_LEN 5 +#define DLEP_DIT_V4CONN_WPORT_LEN 7 +#define DLEP_DIT_V6CONN_LEN 17 +#define DLEP_DIT_V6CONN_WPORT_LEN 19 +#define DLEP_DIT_PEERTYPE_MINLEN 1 /* variable length */ +#define DLEP_DIT_HEARTBEAT_LEN 4 +/* EXTSUPP has variable, non-negative length */ +#define DLEP_DIT_MACADDR_EUI48_LEN 6 +#define DLEP_DIT_MACADDR_EUI64_LEN 8 +#define DLEP_DIT_V4ADDR_LEN 5 +#define DLEP_DIT_V6ADDR_LEN 17 +#define DLEP_DIT_V4SUBNET_LEN 6 +#define DLEP_DIT_V6SUBNET_LEN 18 +#define DLEP_DIT_MDRR_LEN 8 +#define DLEP_DIT_MDRT_LEN 8 +#define DLEP_DIT_CDRR_LEN 8 +#define DLEP_DIT_CDRT_LEN 8 +#define DLEP_DIT_LAT_LEN 8 +#define DLEP_DIT_RES_LEN 1 +#define DLEP_DIT_RLQR_LEN 1 +#define DLEP_DIT_RLQT_LEN 1 +#define DLEP_DIT_MTU_LEN 2 +#define DLEP_DIT_HOP_CNT_LEN 2 +#define DLEP_DIT_HOP_CNTRL_LEN 2 +#define DLEP_DIT_LI_LENGTH_LEN 2 +#define DLEP_DIT_LAT_RANGE_LEN 16 + +/* DLEP Data Item Flags Lengths (bytes) */ +#define DLEP_DIT_V4CONN_FLAGS_LEN 1 +#define DLEP_DIT_V6CONN_FLAGS_LEN 1 +#define DLEP_DIT_V4ADDR_FLAGS_LEN 1 +#define DLEP_DIT_V6ADDR_FLAGS_LEN 1 +#define DLEP_DIT_PEERTYPE_FLAGS_LEN 1 +#define DLEP_DIT_V4SUBNET_FLAGS_LEN 1 +#define DLEP_DIT_V6SUBNET_FLAGS_LEN 1 + + +/* Section 15: IANA Considerations */ + +/* Section 15.2: DLEP Signal Type Codes */ +#define DLEP_SIG_RESERVED 0 +#define DLEP_SIG_PEERDISC 1 +#define DLEP_SIG_PEEROFFR 2 + +/* Section 15.3: DLEP Message Type Codes */ +#define DLEP_MSG_RESERVED 0 +#define DLEP_MSG_SESSINIT 1 +#define DLEP_MSG_SESSINITRESP 2 +#define DLEP_MSG_SESSUPDATE 3 +#define DLEP_MSG_SESSUPDATERESP 4 +#define DLEP_MSG_SESSTERM 5 +#define DLEP_MSG_SESSTERMRESP 6 +#define DLEP_MSG_DESTUP 7 +#define DLEP_MSG_DESTUPRESP 8 +#define DLEP_MSG_DESTANN 9 +#define DLEP_MSG_DESTANNRESP 10 +#define DLEP_MSG_DESTDOWN 11 +#define DLEP_MSG_DESTDOWNRESP 12 +#define DLEP_MSG_DESTUPDATE 13 +#define DLEP_MSG_LINKCHARRQST 14 +#define DLEP_MSG_LINKCHARRESP 15 +#define DLEP_MSG_HEARTBEAT 16 + +/* Section 15.4: DLEP Data Item Type Codes */ +#define DLEP_DIT_RESERVED 0 +#define DLEP_DIT_STATUS 1 +#define DLEP_DIT_V4CONN 2 +#define DLEP_DIT_V6CONN 3 +#define DLEP_DIT_PEERTYPE 4 +#define DLEP_DIT_HEARTBEAT 5 +#define DLEP_DIT_EXTSUPP 6 +#define DLEP_DIT_MACADDR 7 +#define DLEP_DIT_V4ADDR 8 +#define DLEP_DIT_V6ADDR 9 +#define DLEP_DIT_V4SUBNET 10 +#define DLEP_DIT_V6SUBNET 11 +#define DLEP_DIT_MDRR 12 +#define DLEP_DIT_MDRT 13 +#define DLEP_DIT_CDRR 14 +#define DLEP_DIT_CDRT 15 +#define DLEP_DIT_LAT 16 +#define DLEP_DIT_RES 17 +#define DLEP_DIT_RLQR 18 +#define DLEP_DIT_RLQT 19 +#define DLEP_DIT_MTU 20 +#define DLEP_DIT_HOP_CNT 21 +#define DLEP_DIT_HOP_CNTRL 22 +#define DLEP_DIT_QUEUE_PARA 23 +#define DLEP_DIT_PAUSE 24 +#define DLEP_DIT_RESTART 25 +#define DLEP_DIT_LI_LENGTH 26 +#define DLEP_DIT_LI 27 +#define DLEP_DIT_LAT_RANGE 28 + +/* Section 15.5: DLEP Status Codes */ +#define DLEP_SC_CONT_SUCCESS 0 +#define DLEP_SC_CONT_NOTINT 1 +#define DLEP_SC_CONT_RQSTDENIED 2 +#define DLEP_SC_CONT_INCONSIST 3 +#define DLEP_SC_TERM_UNKWNMSG 128 +#define DLEP_SC_TERM_UNEXPMSG 129 +#define DLEP_SC_TERM_INVDATA 130 +#define DLEP_SC_TERM_INVDEST 131 +#define DLEP_SC_TERM_TIMEDOUT 132 +#define DLEP_SC_TERM_SHUTDOWN 255 + +/* Section 15.6: DLEP Extension Type Codes */ +#define DLEP_EXT_RESERVED 0 +#define DLEP_EXT_MULTIHOP 1 +#define DLEP_EXT_CPB_PAUSE 2 +#define DLEP_EXT_LI 3 +#define DLEP_EXT_LR 4 + +/* Section 15.7: DLEP IPv4 Connection Point Flags */ +#define DLEP_DIT_V4CONN_FLAGMASK_BITLEN DLEP_DIT_V4CONN_FLAGS_LEN * 8 +#define DLEP_DIT_V4CONN_FLAGMASK_TLS 0x01 + +/* Section 15.8: DLEP IPv6 Connection Point Flags */ +#define DLEP_DIT_V6CONN_FLAGMASK_BITLEN DLEP_DIT_V6CONN_FLAGS_LEN * 8 +#define DLEP_DIT_V6CONN_FLAGMASK_TLS 0x01 + +/* Section 15.9: DLEP Peer Type Flags */ +#define DLEP_DIT_PEERTYPE_FLAGMASK_BITLEN DLEP_DIT_PEERTYPE_FLAGS_LEN * 8 +#define DLEP_DIT_PEERTYPE_FLAGMASK_SMI 0x01 + +/* Section 15.10: DLEP IPv4 Address Flags */ +#define DLEP_DIT_V4ADDR_FLAGMASK_BITLEN DLEP_DIT_V4ADDR_FLAGS_LEN * 8 +#define DLEP_DIT_V4ADDR_FLAGMASK_ADDDROP 0x01 + +/* Section 15.11: DLEP IPv6 Address Flags */ +#define DLEP_DIT_V6ADDR_FLAGMASK_BITLEN DLEP_DIT_V6ADDR_FLAGS_LEN * 8 +#define DLEP_DIT_V6ADDR_FLAGMASK_ADDDROP 0x01 + +/* Section 15.12: DLEP IPv4 Attached Subnet Flags */ +#define DLEP_DIT_V4SUBNET_FLAGMASK_BITLEN DLEP_DIT_V4SUBNET_FLAGS_LEN * 8 +#define DLEP_DIT_V4SUBNET_FLAGMASK_ADDDROP 0x01 + +/* Section 15.13: DLEP IPv6 Attached Subnet Flags */ +#define DLEP_DIT_V6SUBNET_FLAGMASK_BITLEN DLEP_DIT_V6SUBNET_FLAGS_LEN * 8 +#define DLEP_DIT_V6SUBNET_FLAGMASK_ADDDROP 0x01 + +/* RFC 8629 Hop Count Flags */ +#define DLEP_DIT_HOP_CNT_FLAGMASK_P 0x80 +#define DLEP_DIT_HOP_CNT_FLAGMASK_RESERVED 0x7F + +/* Section 15.14: DLEP Well-known Port */ +#define DLEP_UDP_PORT "854" +#define DLEP_TCP_PORT "854" + +/* Section 15.15: DLEP IPv4 Link-Local Multicast Address */ +#define DLEP_IPV4_ADDR "224.0.0.117" + +/* Section 15.16: DLEP IPv6 Link-Local Multicast Address */ +#define DLEP_IPV6_ADDR "FF02:0:0:0:0:0:1:7" + +#define DLEP_MSG_HEADER_LEN 4 + +static gboolean dlep_desegment = TRUE; + +static dissector_handle_t dlep_msg_handle; +static dissector_handle_t dlep_sig_handle; +static dissector_table_t dlep_dataitem_table; + +void proto_register_dlep(void); +void proto_reg_handoff_dlep(void); + +static gint proto_dlep = -1; +static gint proto_dataitem = -1; + +static gint ett_dlep = -1; +static gint ett_dlep_dataitem = -1; +static gint ett_dlep_flags = -1; + +static gint hf_dlep_signal = -1; +static gint hf_dlep_signal_signature = -1; +static gint hf_dlep_signal_type = -1; +static gint hf_dlep_signal_length = -1; +static gint hf_dlep_message = -1; +static gint hf_dlep_message_type = -1; +static gint hf_dlep_message_length = -1; +static gint hf_dlep_dataitem = -1; +static gint hf_dlep_dataitem_type = -1; +static gint hf_dlep_dataitem_length = -1; +static gint hf_dlep_dataitem_value = -1; +static gint hf_dlep_dataitem_status = -1; +static gint hf_dlep_dataitem_status_code = -1; +static gint hf_dlep_dataitem_status_text = -1; +static gint hf_dlep_dataitem_v4conn = -1; +static gint hf_dlep_dataitem_v4conn_flags = -1; +static gint hf_dlep_dataitem_v4conn_flags_tls = -1; +static gint hf_dlep_dataitem_v4conn_addr = -1; +static gint hf_dlep_dataitem_v4conn_port = -1; +static gint hf_dlep_dataitem_v6conn = -1; +static gint hf_dlep_dataitem_v6conn_flags = -1; +static gint hf_dlep_dataitem_v6conn_flags_tls = -1; +static gint hf_dlep_dataitem_v6conn_addr = -1; +static gint hf_dlep_dataitem_v6conn_port = -1; +static gint hf_dlep_dataitem_peertype = -1; +static gint hf_dlep_dataitem_peertype_flags = -1; +static gint hf_dlep_dataitem_peertype_flags_smi = -1; +static gint hf_dlep_dataitem_peertype_description = -1; +static gint hf_dlep_dataitem_heartbeat = -1; +static gint hf_dlep_dataitem_extsupp = -1; +static gint hf_dlep_dataitem_extsupp_code = -1; +static gint hf_dlep_dataitem_macaddr_eui48 = -1; +static gint hf_dlep_dataitem_macaddr_eui64 = -1; +static gint hf_dlep_dataitem_v4addr = -1; +static gint hf_dlep_dataitem_v4addr_flags = -1; +static gint hf_dlep_dataitem_v4addr_flags_adddrop = -1; +static gint hf_dlep_dataitem_v4addr_addr = -1; +static gint hf_dlep_dataitem_v6addr = -1; +static gint hf_dlep_dataitem_v6addr_flags = -1; +static gint hf_dlep_dataitem_v6addr_flags_adddrop = -1; +static gint hf_dlep_dataitem_v6addr_addr = -1; +static gint hf_dlep_dataitem_v4subnet = -1; +static gint hf_dlep_dataitem_v4subnet_flags = -1; +static gint hf_dlep_dataitem_v4subnet_flags_adddrop = -1; +static gint hf_dlep_dataitem_v4subnet_subnet = -1; +static gint hf_dlep_dataitem_v4subnet_prefixlen = -1; +static gint hf_dlep_dataitem_v6subnet = -1; +static gint hf_dlep_dataitem_v6subnet_flags = -1; +static gint hf_dlep_dataitem_v6subnet_flags_adddrop = -1; +static gint hf_dlep_dataitem_v6subnet_subnet = -1; +static gint hf_dlep_dataitem_v6subnet_prefixlen = -1; +static gint hf_dlep_dataitem_mdrr = -1; +static gint hf_dlep_dataitem_mdrt = -1; +static gint hf_dlep_dataitem_cdrr = -1; +static gint hf_dlep_dataitem_cdrt = -1; +static gint hf_dlep_dataitem_latency = -1; +static gint hf_dlep_dataitem_resources = -1; +static gint hf_dlep_dataitem_rlqr = -1; +static gint hf_dlep_dataitem_rlqt = -1; +static gint hf_dlep_dataitem_mtu = -1; +static gint hf_dlep_dataitem_hop_count_flags = -1; +static gint hf_dlep_dataitem_hop_count_flags_p = -1; +static gint hf_dlep_dataitem_hop_count_flags_reserved = -1; +static gint hf_dlep_dataitem_hop_count = -1; +static gint hf_dlep_dataitem_hop_control = -1; +static gint hf_dlep_dataitem_li_length = -1; +static gint hf_dlep_dataitem_li = -1; +static gint hf_dlep_dataitem_max_lat = -1; +static gint hf_dlep_dataitem_min_lat = -1; + +static const value_string signal_type_vals[] = { + { DLEP_SIG_RESERVED, "Reserved" }, + { DLEP_SIG_PEERDISC, "Peer Discovery" }, + { DLEP_SIG_PEEROFFR, "Peer Offer" }, + { 0, NULL } +}; + +static const value_string message_type_vals[] = { + { DLEP_MSG_RESERVED, "Reserved" }, + { DLEP_MSG_SESSINIT, "Session Initialization" }, + { DLEP_MSG_SESSINITRESP, "Session Initialization Response" }, + { DLEP_MSG_SESSUPDATE, "Session Update" }, + { DLEP_MSG_SESSUPDATERESP, "Session Update Response" }, + { DLEP_MSG_SESSTERM, "Session Termination" }, + { DLEP_MSG_SESSTERMRESP, "Session Termination Response" }, + { DLEP_MSG_DESTUP, "Destination Up" }, + { DLEP_MSG_DESTUPRESP, "Destination Up Response" }, + { DLEP_MSG_DESTANN, "Destination Announce" }, + { DLEP_MSG_DESTANNRESP, "Destination Announce Response" }, + { DLEP_MSG_DESTDOWN, "Destination Down" }, + { DLEP_MSG_DESTDOWNRESP, "Destination Down Response" }, + { DLEP_MSG_DESTUPDATE, "Destination Update" }, + { DLEP_MSG_LINKCHARRQST, "Link Characteristics Request" }, + { DLEP_MSG_LINKCHARRESP, "Link Characteristics Response" }, + { DLEP_MSG_HEARTBEAT, "Heartbeat" }, + { 0, NULL } +}; + +static const value_string dataitem_type_vals[] = { + { DLEP_DIT_RESERVED, "Reserved" }, + { DLEP_DIT_STATUS, "Status" }, + { DLEP_DIT_V4CONN, "IPv4 Connection Point" }, + { DLEP_DIT_V6CONN, "IPv6 Connection Point" }, + { DLEP_DIT_PEERTYPE, "Peer Type" }, + { DLEP_DIT_HEARTBEAT, "Heartbeat Interval" }, + { DLEP_DIT_EXTSUPP, "Extensions Supported" }, + { DLEP_DIT_MACADDR, "MAC Address" }, + { DLEP_DIT_V4ADDR, "IPv4 Address" }, + { DLEP_DIT_V6ADDR, "IPv6 Address" }, + { DLEP_DIT_V4SUBNET, "IPv4 Attached Subnet" }, + { DLEP_DIT_V6SUBNET, "IPv6 Attached Subnet" }, + { DLEP_DIT_MDRR, "Maximum Data Rate (Receive) (MDRR)" }, + { DLEP_DIT_MDRT, "Maximum Data Rate (Transmit) (MDRT)" }, + { DLEP_DIT_CDRR, "Current Data Rate (Receive) (CDRR)" }, + { DLEP_DIT_CDRT, "Current Data Rate (Transmit) (CDRT)" }, + { DLEP_DIT_LAT, "Latency" }, + { DLEP_DIT_RES, "Resources (RES)" }, + { DLEP_DIT_RLQR, "Relative Link Quality (Receive) (RLQR)" }, + { DLEP_DIT_RLQT, "Relative Link Quality (Transmit) (RLQT)" }, + { DLEP_DIT_MTU, "Maximum Transmission Unit (MTU)" }, + { DLEP_DIT_HOP_CNT, "Hop Count" }, + { DLEP_DIT_HOP_CNTRL, "Hop Control" }, + { DLEP_DIT_QUEUE_PARA,"Queue Parameters" }, + { DLEP_DIT_PAUSE, "Pause" }, + { DLEP_DIT_RESTART, "Restart" }, + { DLEP_DIT_LI_LENGTH, "Link Identifier Length" }, + { DLEP_DIT_LI, "Link Identifier" }, + { DLEP_DIT_LAT_RANGE, "Latency Range" }, + { 0, NULL } +}; + +static const value_string status_code_vals[] = { + { DLEP_SC_CONT_SUCCESS, "Success" }, + { DLEP_SC_CONT_NOTINT, "Not Interested" }, + { DLEP_SC_CONT_RQSTDENIED, "Request Denied" }, + { DLEP_SC_CONT_INCONSIST, "Inconsistent Data" }, + { DLEP_SC_TERM_UNKWNMSG, "Unknown Message" }, + { DLEP_SC_TERM_UNEXPMSG, "Unexpected Message" }, + { DLEP_SC_TERM_INVDATA, "Invalid Data" }, + { DLEP_SC_TERM_INVDEST, "Invalid Destination" }, + { DLEP_SC_TERM_TIMEDOUT, "Timed Out" }, + { DLEP_SC_TERM_SHUTDOWN, "Shutting Down" }, + { 0, NULL } +}; + +static const range_string extension_code_vals[] = { + { DLEP_EXT_RESERVED, DLEP_EXT_RESERVED, "Reserved" }, + { DLEP_EXT_MULTIHOP, DLEP_EXT_MULTIHOP, "Multi-Hop Forwarding" }, + { DLEP_EXT_CPB_PAUSE, DLEP_EXT_CPB_PAUSE, "Control-Plane-Based Pause" }, + { DLEP_EXT_LI, DLEP_EXT_LI, "Link Identifiers" }, + { DLEP_EXT_LR, DLEP_EXT_LR, "Latency Range" }, + { 5, 65519, "Unassigned" }, + { 65520, 65534, "Reserved for Private Use" }, + { 0, 0, NULL } +}; + +static const range_string hop_cntrl_action_vals[] = { + { 0, 0, "Reset" }, + { 1, 1, "Terminate" }, + { 2, 2, "Direct Connection" }, + { 3, 3, "Suppress Forwarding" }, + { 4, 65519, "Specification Required" }, + { 65520, 65534, "Private Use" }, + { 65535, 65535, "Reserved" }, + { 0, 0, NULL } +}; + +static expert_field ei_dlep_signal_unexpected_length = EI_INIT; +static expert_field ei_dlep_message_unexpected_length = EI_INIT; +static expert_field ei_dlep_dataitem_unexpected_length = EI_INIT; +static expert_field ei_dlep_dataitem_macaddr_unexpected_length = EI_INIT; + +/* Section 13.1: Status */ +static int +decode_dataitem_status(tvbuff_t *tvb, packet_info *pinfo, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + const gint len = tvb_captured_length(tvb); + gint offset = 0; + proto_item *tmp_pi = NULL; + guint32 status_code; + + /* Add and hide the specific dataitem protocol item */ + tmp_pi = proto_tree_add_item(pt, hf_dlep_dataitem_status, tvb, offset, len, ENC_NA); + proto_item_set_hidden(tmp_pi); + + if (len < DLEP_DIT_STATUS_MINLEN) { + return offset; + } + + proto_tree_add_item_ret_uint(pt, hf_dlep_dataitem_status_code, tvb, offset, 1, ENC_NA, &status_code); + proto_item_append_text(pi, ", Code: %s (%u)", val_to_str_const(status_code, status_code_vals, "Unknown"), status_code); + offset+=1; + + proto_tree_add_item(pt, hf_dlep_dataitem_status_text, tvb, offset, len-1, ENC_UTF_8); + proto_item_append_text(pi, ", Text: %s", tvb_get_string_enc(pinfo->pool, tvb, offset, len-1, ENC_UTF_8)); + offset+=len-1; + + return offset; +} + +/* Section 13.2: IPv4 Connection Point */ +static int +decode_dataitem_v4conn(tvbuff_t *tvb, packet_info *pinfo, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + const gint len = tvb_captured_length(tvb); + gint offset = 0; + proto_item* tmp_pi = NULL; + proto_tree* flags_pt = NULL; + guint32 v4conn_port; + + tmp_pi = proto_tree_add_item(pt, hf_dlep_dataitem_v4conn, tvb, offset, len, ENC_NA); + proto_item_set_hidden(tmp_pi); + + tmp_pi = proto_tree_add_item(pt, hf_dlep_dataitem_v4conn_flags, tvb, offset, DLEP_DIT_V4CONN_FLAGS_LEN, ENC_NA); + flags_pt = proto_item_add_subtree(tmp_pi, ett_dlep_flags); + proto_tree_add_item(flags_pt, hf_dlep_dataitem_v4conn_flags_tls, tvb, offset, DLEP_DIT_V4CONN_FLAGS_LEN, ENC_NA); + offset+=DLEP_DIT_V4CONN_FLAGS_LEN; + + proto_tree_add_item(pt, hf_dlep_dataitem_v4conn_addr, tvb, offset, FT_IPv4_LEN, ENC_BIG_ENDIAN); + proto_item_append_text(pi, ", Addr: %s", tvb_ip_to_str(pinfo->pool, tvb, offset)); + offset+=FT_IPv4_LEN; + + if (len == DLEP_DIT_V4CONN_WPORT_LEN) { + proto_tree_add_item_ret_uint(pt, hf_dlep_dataitem_v4conn_port, tvb, offset, 2, ENC_BIG_ENDIAN, &v4conn_port); + proto_item_append_text(pi, ", Port: %u", v4conn_port); + offset+=2; + } + + return offset; +} + +/* Section 13.3: IPv6 Connection Point */ +static int +decode_dataitem_v6conn(tvbuff_t *tvb, packet_info *pinfo, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + const gint len = tvb_captured_length(tvb); + gint offset = 0; + proto_item* tmp_pi = NULL; + proto_tree* flags_pt = NULL; + guint32 v6conn_port; + + tmp_pi = proto_tree_add_item(pt, hf_dlep_dataitem_v6conn, tvb, offset, len, ENC_NA); + proto_item_set_hidden(tmp_pi); + + tmp_pi = proto_tree_add_item(pt, hf_dlep_dataitem_v6conn_flags, tvb, offset, DLEP_DIT_V6CONN_FLAGS_LEN, ENC_NA); + flags_pt = proto_item_add_subtree(tmp_pi, ett_dlep_flags); + proto_tree_add_item(flags_pt, hf_dlep_dataitem_v6conn_flags_tls, tvb, offset, DLEP_DIT_V6CONN_FLAGS_LEN, ENC_NA); + offset+=DLEP_DIT_V6CONN_FLAGS_LEN; + + proto_tree_add_item(pt, hf_dlep_dataitem_v6conn_addr, tvb, offset, FT_IPv6_LEN, ENC_NA); + proto_item_append_text(pi, ", Addr: %s", tvb_ip6_to_str(pinfo->pool, tvb, offset)); + offset+=FT_IPv6_LEN; + + if (len == DLEP_DIT_V6CONN_WPORT_LEN) { + proto_tree_add_item_ret_uint(pt, hf_dlep_dataitem_v6conn_port, tvb, offset, 2, ENC_BIG_ENDIAN, &v6conn_port); + proto_item_append_text(pi, ", Port: %u", v6conn_port); + offset+=2; + } + + return offset; +} + +/* Section 13.4: Peer Type */ +static int +decode_dataitem_peertype(tvbuff_t *tvb, packet_info *pinfo, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + const gint len = tvb_captured_length(tvb); + gint offset = 0; + proto_item *tmp_pi = NULL; + proto_tree * flags_pt = NULL; + + tmp_pi = proto_tree_add_item(pt, hf_dlep_dataitem_peertype, tvb, offset, len, ENC_NA); + proto_item_set_hidden(tmp_pi); + + if (len < DLEP_DIT_PEERTYPE_MINLEN) { + return offset; + } + + tmp_pi = proto_tree_add_item(pt, hf_dlep_dataitem_peertype_flags, tvb, offset, DLEP_DIT_PEERTYPE_FLAGS_LEN, ENC_NA); + flags_pt = proto_item_add_subtree(tmp_pi, ett_dlep_flags); + proto_tree_add_item(flags_pt, hf_dlep_dataitem_peertype_flags_smi, tvb, offset, DLEP_DIT_PEERTYPE_FLAGS_LEN, ENC_NA); + offset+=DLEP_DIT_PEERTYPE_FLAGS_LEN; + + proto_tree_add_item(pt, hf_dlep_dataitem_peertype_description, tvb, offset, len-DLEP_DIT_PEERTYPE_FLAGS_LEN, ENC_UTF_8); + proto_item_append_text(pi, ", Description: %s", tvb_get_string_enc(pinfo->pool, tvb, offset, len-DLEP_DIT_PEERTYPE_FLAGS_LEN, ENC_UTF_8)); + offset+=len-DLEP_DIT_PEERTYPE_FLAGS_LEN; + + return offset; +} + +/* Section 13.5: Heartbeat Interval */ +static int +decode_dataitem_heartbeat(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + gint offset = 0; + guint32 heartbeat; + + proto_tree_add_item_ret_uint(pt, hf_dlep_dataitem_heartbeat, tvb, offset, DLEP_DIT_HEARTBEAT_LEN, ENC_BIG_ENDIAN, &heartbeat); + proto_item_append_text(pi, ": %u (ms)", heartbeat); + offset+=DLEP_DIT_HEARTBEAT_LEN; + + return offset; +} + +/* Section 13.6: Extensions Supported */ +static int +decode_dataitem_extsupp(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + const gint len = tvb_captured_length(tvb); + gint offset = 0; + guint32 extension_code; + + proto_item* tmp_pi = NULL; + + tmp_pi = proto_tree_add_item(pt, hf_dlep_dataitem_extsupp, tvb, offset, len, ENC_NA); + proto_item_set_hidden(tmp_pi); + + while(offset < len) { + proto_tree_add_item_ret_uint(pt, hf_dlep_dataitem_extsupp_code, tvb, offset, 2, ENC_BIG_ENDIAN, &extension_code); + proto_item_append_text(pi, ", Ext: %s (%u)", rval_to_str_const(extension_code, extension_code_vals, "Unknown"), extension_code); + offset+=2; + } + + return offset; +} + +/* Section 13.7: MAC Address */ +static int +decode_dataitem_macaddr(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + const gint len = tvb_captured_length(tvb); + gint offset = 0; + switch(len) { + case FT_ETHER_LEN: + proto_tree_add_item(pt, hf_dlep_dataitem_macaddr_eui48, tvb, offset, len, ENC_NA); + proto_item_append_text(pi, ": %s", tvb_ether_to_str(wmem_packet_scope(), tvb, offset)); + break; + case FT_EUI64_LEN: + proto_tree_add_item(pt, hf_dlep_dataitem_macaddr_eui64, tvb, offset, len, ENC_BIG_ENDIAN); + proto_item_append_text(pi, ": %s", tvb_eui64_to_str(wmem_packet_scope(), tvb, offset)); + break; + default: + proto_tree_add_expert(pt, NULL, &ei_dlep_dataitem_macaddr_unexpected_length, tvb, offset, len); + break; + } + offset+=len; + + return offset; +} + +/* Section 13.8: IPv4 Address */ +static int +decode_dataitem_v4addr(tvbuff_t *tvb, packet_info *pinfo, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + gint offset = 0; + proto_item* tmp_pi = NULL; + proto_tree* flags_pt = NULL; + + tmp_pi = proto_tree_add_item(pt, hf_dlep_dataitem_v4addr, tvb, offset, DLEP_DIT_V4ADDR_LEN, ENC_NA); + proto_item_set_hidden(tmp_pi); + + tmp_pi = proto_tree_add_item(pt, hf_dlep_dataitem_v4addr_flags, tvb, offset, DLEP_DIT_V4ADDR_FLAGS_LEN, ENC_NA); + flags_pt = proto_item_add_subtree(tmp_pi, ett_dlep_flags); + proto_tree_add_item(flags_pt, hf_dlep_dataitem_v4addr_flags_adddrop, tvb, offset, DLEP_DIT_V4ADDR_FLAGS_LEN, ENC_BIG_ENDIAN); + proto_item_append_text(pi, ", %s:", tfs_get_string(tvb_get_guint8(tvb, offset) & DLEP_DIT_V4ADDR_FLAGMASK_ADDDROP, &tfs_add_drop)); + offset+=DLEP_DIT_V4ADDR_FLAGS_LEN; + + proto_tree_add_item(pt, hf_dlep_dataitem_v4addr_addr, tvb, offset, FT_IPv4_LEN, ENC_BIG_ENDIAN); + proto_item_append_text(pi, " %s", tvb_ip_to_str(pinfo->pool, tvb, offset)); + offset+=FT_IPv4_LEN; + + return offset; +} + +/* Section 13.9: IPv6 Address */ +static int +decode_dataitem_v6addr(tvbuff_t *tvb, packet_info *pinfo, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + gint offset = 0; + proto_item* tmp_pi = NULL; + proto_tree* flags_pt = NULL; + + tmp_pi = proto_tree_add_item(pt, hf_dlep_dataitem_v6addr, tvb, offset, DLEP_DIT_V6ADDR_LEN, ENC_NA); + proto_item_set_hidden(tmp_pi); + + tmp_pi = proto_tree_add_item(pt, hf_dlep_dataitem_v6addr_flags, tvb, offset, DLEP_DIT_V6ADDR_FLAGS_LEN, ENC_NA); + flags_pt = proto_item_add_subtree(tmp_pi, ett_dlep_flags); + proto_tree_add_item(flags_pt, hf_dlep_dataitem_v6addr_flags_adddrop, tvb, offset, DLEP_DIT_V6ADDR_FLAGS_LEN, ENC_BIG_ENDIAN); + proto_item_append_text(pi, ", %s:", tfs_get_string(tvb_get_guint8(tvb, offset) & DLEP_DIT_V6ADDR_FLAGMASK_ADDDROP, &tfs_add_drop)); + offset+=DLEP_DIT_V6ADDR_FLAGS_LEN; + + proto_tree_add_item(pt, hf_dlep_dataitem_v6addr_addr, tvb, offset, FT_IPv6_LEN, ENC_NA); + proto_item_append_text(pi, " %s", tvb_ip6_to_str(pinfo->pool, tvb, offset)); + offset+=FT_IPv6_LEN; + + return offset; +} + +/* Section 13.10: IPv4 Attached Subnet */ +static int +decode_dataitem_v4subnet(tvbuff_t *tvb, packet_info *pinfo, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + gint offset = 0; + proto_item* tmp_pi = NULL; + proto_tree* flags_pt = NULL; + guint32 prefixlen; + + tmp_pi = proto_tree_add_item(pt, hf_dlep_dataitem_v4subnet, tvb, offset, DLEP_DIT_V4SUBNET_LEN, ENC_NA); + proto_item_set_hidden(tmp_pi); + + tmp_pi = proto_tree_add_item(pt, hf_dlep_dataitem_v4subnet_flags, tvb, offset, DLEP_DIT_V4SUBNET_FLAGS_LEN, ENC_NA); + flags_pt = proto_item_add_subtree(tmp_pi, ett_dlep_flags); + proto_tree_add_item(flags_pt, hf_dlep_dataitem_v4subnet_flags_adddrop, tvb, offset, DLEP_DIT_V4SUBNET_FLAGS_LEN, ENC_BIG_ENDIAN); + proto_item_append_text(pi, ", %s:", tfs_get_string(tvb_get_guint8(tvb, offset) & DLEP_DIT_V4SUBNET_FLAGMASK_ADDDROP, &tfs_add_drop)); + offset+=DLEP_DIT_V4SUBNET_FLAGS_LEN; + + proto_tree_add_item(pt, hf_dlep_dataitem_v4subnet_subnet, tvb, offset, FT_IPv4_LEN, ENC_BIG_ENDIAN); + proto_item_append_text(pi, " %s", tvb_ip_to_str(pinfo->pool, tvb, offset)); + offset+=FT_IPv4_LEN; + + proto_tree_add_item_ret_uint(pt, hf_dlep_dataitem_v4subnet_prefixlen, tvb, offset, 1, ENC_BIG_ENDIAN, &prefixlen); + proto_item_append_text(pi, "/%u", prefixlen); + offset+=1; + + return offset; +} + +/* Section 13.11: IPv6 Attached Subnet */ +static int +decode_dataitem_v6subnet(tvbuff_t *tvb, packet_info *pinfo, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + gint offset = 0; + proto_item* tmp_pi = NULL; + proto_tree* flags_pt = NULL; + guint32 prefixlen; + + tmp_pi = proto_tree_add_item(pt, hf_dlep_dataitem_v6subnet, tvb, offset, DLEP_DIT_V6SUBNET_LEN, ENC_NA); + proto_item_set_hidden(tmp_pi); + + tmp_pi = proto_tree_add_item(pt, hf_dlep_dataitem_v6subnet_flags, tvb, offset, DLEP_DIT_V6SUBNET_FLAGS_LEN, ENC_NA); + flags_pt = proto_item_add_subtree(tmp_pi, ett_dlep_flags); + proto_tree_add_item(flags_pt, hf_dlep_dataitem_v6subnet_flags_adddrop, tvb, offset, DLEP_DIT_V6SUBNET_FLAGS_LEN, ENC_BIG_ENDIAN); + proto_item_append_text(pi, ", %s:", tfs_get_string(tvb_get_guint8(tvb, offset) & DLEP_DIT_V6SUBNET_FLAGMASK_ADDDROP, &tfs_add_drop)); + offset+=DLEP_DIT_V6SUBNET_FLAGS_LEN; + + proto_tree_add_item(pt, hf_dlep_dataitem_v6subnet_subnet, tvb, offset, FT_IPv6_LEN, ENC_NA); + proto_item_append_text(pi, " %s", tvb_ip6_to_str(pinfo->pool, tvb, offset)); + offset+=FT_IPv6_LEN; + + proto_tree_add_item_ret_uint(pt, hf_dlep_dataitem_v6subnet_prefixlen, tvb, offset, 1, ENC_BIG_ENDIAN, &prefixlen); + proto_item_append_text(pi, "/%u", prefixlen); + offset+=1; + + return offset; +} + +/* Section 13.12: Maximum Data Rate (Receive) */ +static int +decode_dataitem_mdrr(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + gint offset = 0; + guint64 mdrr; + + proto_tree_add_item_ret_uint64(pt, hf_dlep_dataitem_mdrr, tvb, offset, DLEP_DIT_MDRR_LEN, ENC_BIG_ENDIAN, &mdrr); + proto_item_append_text(pi, ": %" PRIu64 " (bps)", mdrr); + offset+=DLEP_DIT_MDRR_LEN; + + return offset; +} + +/* Section 13.13: Maximum Data Rate (Transmit) */ +static int +decode_dataitem_mdrt(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + gint offset = 0; + guint64 mdrt; + + proto_tree_add_item_ret_uint64(pt, hf_dlep_dataitem_mdrt, tvb, offset, DLEP_DIT_MDRT_LEN, ENC_BIG_ENDIAN, &mdrt); + proto_item_append_text(pi, ": %" PRIu64 " (bps)", mdrt); + offset+=DLEP_DIT_MDRT_LEN; + + return offset; +} + +/* Section 13.14: Current Data Rate (Receive) */ +static int +decode_dataitem_cdrr(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + gint offset = 0; + guint64 cdrr; + + proto_tree_add_item_ret_uint64(pt, hf_dlep_dataitem_cdrr, tvb, offset, DLEP_DIT_CDRR_LEN, ENC_BIG_ENDIAN, &cdrr); + proto_item_append_text(pi, ": %" PRIu64 " (bps)", cdrr); + offset+=DLEP_DIT_CDRR_LEN; + + return offset; +} + +/* Section 13.15: Current Data Rate (Transmit) */ +static int +decode_dataitem_cdrt(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + gint offset = 0; + guint64 cdrt; + + proto_tree_add_item_ret_uint64(pt, hf_dlep_dataitem_cdrt, tvb, offset, DLEP_DIT_CDRT_LEN, ENC_BIG_ENDIAN, &cdrt); + proto_item_append_text(pi, ": %" PRIu64 " (bps)", cdrt); + offset+=DLEP_DIT_CDRT_LEN; + + return offset; +} + +/* Section 13.16: Latency */ +static int +decode_dataitem_latency(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + gint offset = 0; + guint64 latency; + + proto_tree_add_item_ret_uint64(pt, hf_dlep_dataitem_latency, tvb, offset, DLEP_DIT_LAT_LEN, ENC_BIG_ENDIAN, &latency); + proto_item_append_text(pi, ": %" PRIu64 " (us)", latency); + offset+=DLEP_DIT_LAT_LEN; + + return offset; +} + +/* Section 13.17: Resources */ +static int +decode_dataitem_resources(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + gint offset = 0; + guint32 resources; + + proto_tree_add_item_ret_uint(pt, hf_dlep_dataitem_resources, tvb, offset, DLEP_DIT_RES_LEN, ENC_BIG_ENDIAN, &resources); + proto_item_append_text(pi, ": %u (%%)", resources); + offset+=DLEP_DIT_RES_LEN; + + return offset; +} + +/* Section 13.18: Relative Link Quality (Receive) */ +static int +decode_dataitem_rlqr(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + gint offset = 0; + guint32 rlqr; + + proto_tree_add_item_ret_uint(pt, hf_dlep_dataitem_rlqr, tvb, offset, DLEP_DIT_RLQR_LEN, ENC_BIG_ENDIAN, &rlqr); + proto_item_append_text(pi, ": %u (%%)", rlqr); + offset+=DLEP_DIT_RLQR_LEN; + + return offset; +} + +/* Section 13.19: Relative Link Quality (Transmit) */ +static int +decode_dataitem_rlqt(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + gint offset = 0; + guint32 rlqt; + + proto_tree_add_item_ret_uint(pt, hf_dlep_dataitem_rlqt, tvb, offset, DLEP_DIT_RLQT_LEN, ENC_BIG_ENDIAN, &rlqt); + proto_item_append_text(pi, ": %u (%%)", rlqt); + offset+=DLEP_DIT_RLQT_LEN; + + return offset; +} + +/* Section 11.20: Maximum Transmission Unit (MTU) */ +static int +decode_dataitem_mtu(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + gint offset = 0; + guint32 mtu; + + proto_tree_add_item_ret_uint(pt, hf_dlep_dataitem_mtu, tvb, offset, DLEP_DIT_MTU_LEN, ENC_BIG_ENDIAN, &mtu); + proto_item_append_text(pi, ": %u (bytes)", mtu); + offset+=DLEP_DIT_MTU_LEN; + + return offset; +} + +/* RFC 8629 Multi-Hop Extension Hop Count*/ +static int +decode_dataitem_hop_cnt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + gint offset = 0; + proto_item *pi_field = NULL; + static int * const hop_cnt_flags[] = { + &hf_dlep_dataitem_hop_count_flags_p, + &hf_dlep_dataitem_hop_count_flags_reserved, + NULL + }; + + proto_tree_add_bitmask(pt, tvb, offset, hf_dlep_dataitem_hop_count_flags, ett_dlep_flags, hop_cnt_flags, ENC_BIG_ENDIAN); + offset+=1; + pi_field = proto_tree_add_item(pt, hf_dlep_dataitem_hop_count, tvb, offset, 1, ENC_NA); + proto_item_append_text(pi, ": %s Hops", proto_item_get_display_repr(pinfo->pool, pi_field)); + offset+=1; + + return offset; +} + +/* RFC 8629 Multi-Hop Extension Hop Control*/ +static int +decode_dataitem_hop_cntrl(tvbuff_t *tvb, packet_info *pinfo, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + gint offset = 0; + proto_item *pi_field = NULL; + + pi_field = proto_tree_add_item(pt, hf_dlep_dataitem_hop_control, tvb, offset, DLEP_DIT_HOP_CNTRL_LEN, ENC_BIG_ENDIAN); + proto_item_append_text(pi, ": %s", proto_item_get_display_repr(pinfo->pool, pi_field)); + offset+=DLEP_DIT_HOP_CNTRL_LEN; + + return offset; +} + +/* RFC 8703 Link Identifier Extension Length */ +static int +decode_dataitem_li_length(tvbuff_t *tvb, packet_info *pinfo, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + gint offset = 0; + proto_item *pi_field = NULL; + + pi_field = proto_tree_add_item(pt, hf_dlep_dataitem_li_length, tvb, offset, DLEP_DIT_LI_LENGTH_LEN, ENC_BIG_ENDIAN); + proto_item_append_text(pi, ": %s Bytes", proto_item_get_display_repr(pinfo->pool, pi_field)); + offset+=DLEP_DIT_LI_LENGTH_LEN; + + return offset; +} + +/* RFC 8703 Link Identifier Extension Data */ +static int +decode_dataitem_li(tvbuff_t *tvb, packet_info *pinfo, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + const gint len = tvb_captured_length(tvb); + gint offset = 0; + + proto_tree_add_item(pt, hf_dlep_dataitem_li, tvb, offset, len, ENC_NA); + proto_item_append_text(pi, ": %s", tvb_bytes_to_str(pinfo->pool, tvb, offset, len)); + offset+=len; + + return offset; +} + +/* RFC 8757 Latency Range Extension */ +static int +decode_dataitem_lat_range(tvbuff_t *tvb, packet_info *pinfo, proto_tree *pt, void *data _U_) +{ + proto_item *pi = proto_tree_get_parent(pt); + gint offset = 0; + proto_item *max_lat = NULL; + proto_item *min_lat = NULL; + + max_lat = proto_tree_add_item(pt, hf_dlep_dataitem_max_lat, tvb, offset, 8, ENC_BIG_ENDIAN); + offset+=8; + min_lat = proto_tree_add_item(pt, hf_dlep_dataitem_min_lat, tvb, offset, 8, ENC_BIG_ENDIAN); + proto_item_append_text(pi, ": %s - %s (us)", proto_item_get_display_repr(pinfo->pool, min_lat), proto_item_get_display_repr(pinfo->pool, max_lat)); + offset+=8; + + return offset; +} + +/** + * Section 11.3: DLEP Generic Data Item + * + * A note on dataitem decoding: + * + * When decoding a specific dataitem, we append information to the generic + * dataitem's protocol display line using proto_item_append_text. This is + * intended to provide a one-line summary of the specific dataitem without + * needing to open the corresponding subtree. The pattern is to typically + * augment the one-line summary as each piece of the specific dataitem is + * decoded. + * + * Additionally, we often create a hidden proto_item under the generic + * dataitem tree that can be used for filtering on the specific dataitem name. + * Subfields of the specific dataitem are then placed under the generic + * dataitem tree. For example, the following filter 'dlep.dataitem.status' is + * valid, but the protocol tree display places 'dlep.dataitem.status.code' + * under 'dlep.dataitem'. For very simple dataitems (e.g., Heartbeat Interval), + * there is only one subfield, and this step is skipped. + */ +static int +decode_dataitem(tvbuff_t *tvb, volatile int offset, proto_tree *pt, packet_info *pinfo) +{ + proto_item *dataitem_pi = NULL; + proto_tree *dataitem_pt = NULL; + int dataitem_type = 0; + int dataitem_length = 0; + tvbuff_t *dataitem_tvb = NULL; + volatile int used_length = 0; + + dataitem_type = tvb_get_ntohs(tvb, offset); + dataitem_length = tvb_get_ntohs(tvb, offset+2); + + dataitem_pi = proto_tree_add_item(pt, hf_dlep_dataitem, tvb, offset, 2+2+dataitem_length, ENC_NA); + dataitem_pt = proto_item_add_subtree(dataitem_pi, ett_dlep_dataitem); + + /* Start the one-line description of the data item */ + proto_item_set_text(dataitem_pi, "%s Data Item", val_to_str_const(dataitem_type, dataitem_type_vals, "Unknown")); + + /* Add supporting fields underneath */ + proto_tree_add_item(dataitem_pt, hf_dlep_dataitem_type, tvb, offset, 2, ENC_BIG_ENDIAN); + offset+=2; + + proto_tree_add_item(dataitem_pt, hf_dlep_dataitem_length, tvb, offset, 2, ENC_BIG_ENDIAN); + offset+=2; + + dataitem_tvb = tvb_new_subset_length(tvb, offset, dataitem_length); + TRY { + used_length = dissector_try_uint(dlep_dataitem_table, dataitem_type, dataitem_tvb, pinfo, dataitem_pt); + } + CATCH_BOUNDS_ERRORS { + expert_add_info(pinfo, dataitem_pi, &ei_dlep_dataitem_unexpected_length); + used_length = dataitem_length; + } + ENDTRY; + if (used_length == 0) { + proto_tree_add_item(dataitem_pt, hf_dlep_dataitem_value, dataitem_tvb, 0, dataitem_length, ENC_NA); + } + else if (used_length != dataitem_length) { + expert_add_info(pinfo, dataitem_pi, &ei_dlep_dataitem_unexpected_length); + } + offset+=dataitem_length; + + return offset; +} + +/* Section 11.1: DLEP Signal Header */ +static int +decode_signal_header(tvbuff_t *tvb, int offset, proto_item* pi, proto_tree *pt, packet_info *pinfo) +{ + proto_item *tmp_pi = NULL; + guint32 signal_type; + guint32 signal_length; + + tmp_pi = proto_tree_add_item(pt, hf_dlep_signal, tvb, offset, 0, ENC_NA); + proto_item_set_hidden(tmp_pi); + + proto_tree_add_item(pt, hf_dlep_signal_signature, tvb, offset, 4, ENC_ASCII); + offset+=4; + + proto_tree_add_item_ret_uint(pt, hf_dlep_signal_type, tvb, offset, 2, ENC_BIG_ENDIAN, &signal_type); + proto_item_append_text(pi, ", Signal: %s (%u)", val_to_str_const(signal_type, signal_type_vals, "Unknown"), signal_type); + col_add_fstr(pinfo->cinfo, COL_INFO, "Signal: %s (%u)", val_to_str_const(signal_type, signal_type_vals, "Unknown"), signal_type); + offset+=2; + + tmp_pi = proto_tree_add_item_ret_uint(pt, hf_dlep_signal_length, tvb, offset, 2, ENC_BIG_ENDIAN, &signal_length); + offset+=2; + + if (signal_length != (guint32)tvb_reported_length_remaining(tvb, offset)) + expert_add_info(pinfo, tmp_pi, &ei_dlep_signal_unexpected_length); + + return offset; +} + +/* Section 11.2: DLEP Message Header */ +static guint +get_dlep_message_header_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset, void *data _U_) +{ + guint message_length; + + message_length = tvb_get_guint16(tvb, offset+2, ENC_BIG_ENDIAN); + + return message_length + DLEP_MSG_HEADER_LEN; +} + +static int +decode_message_header(tvbuff_t *tvb, int offset, proto_item* pi, proto_tree *pt, packet_info *pinfo) +{ + proto_item *tmp_pi = NULL; + guint32 message_type; + guint32 message_length; + + tmp_pi = proto_tree_add_item(pt, hf_dlep_message, tvb, offset, 0, ENC_NA); + proto_item_set_hidden(tmp_pi); + + proto_tree_add_item_ret_uint(pt, hf_dlep_message_type, tvb, offset, 2, ENC_BIG_ENDIAN, &message_type); + proto_item_append_text(pi, ", Message: %s (%u)", val_to_str_const(message_type, message_type_vals, "Unknown"), message_type); + col_add_fstr(pinfo->cinfo, COL_INFO, "Message: %s (%u)", val_to_str_const(message_type, message_type_vals, "Unknown"), message_type); + offset+=2; + + tmp_pi = proto_tree_add_item_ret_uint(pt, hf_dlep_message_length, tvb, offset, 2, ENC_BIG_ENDIAN, &message_length); + offset+=2; + + if (message_length != (guint32)tvb_reported_length_remaining(tvb, offset)) + expert_add_info(pinfo, tmp_pi, &ei_dlep_message_unexpected_length); + + return offset; +} + +static int +dissect_dlep_sig(tvbuff_t *tvb, packet_info *pinfo, proto_tree *pt, void *data _U_) +{ + int offset = 0; + proto_item *dlep_pi = NULL; + proto_tree *dlep_pt = NULL; + + /* init column strings */ + col_set_str(pinfo->cinfo, COL_PROTOCOL, "DLEP"); + col_clear(pinfo->cinfo, COL_INFO); + + dlep_pi = proto_tree_add_item(pt, proto_dlep, tvb, 0, -1, ENC_NA); + dlep_pt = proto_item_add_subtree(dlep_pi, ett_dlep); + + /* decode dlep header */ + offset = decode_signal_header(tvb, offset, dlep_pi, dlep_pt, pinfo); + + /* decode dlep dataitems */ + while (tvb_reported_length_remaining(tvb, offset) > 0) { + offset = decode_dataitem(tvb, offset, dlep_pt, pinfo); + } + + return tvb_captured_length(tvb); +} + +static int +dissect_dlep_msg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *pt, void *data _U_) +{ + int offset = 0; + proto_item *dlep_pi = NULL; + proto_tree *dlep_pt = NULL; + + /* init column strings */ + col_set_str(pinfo->cinfo, COL_PROTOCOL, "DLEP"); + col_clear(pinfo->cinfo, COL_INFO); + + dlep_pi = proto_tree_add_item(pt, proto_dlep, tvb, 0, -1, ENC_NA); + dlep_pt = proto_item_add_subtree(dlep_pi, ett_dlep); + + /* decode dlep header */ + offset = decode_message_header(tvb, offset, dlep_pi, dlep_pt, pinfo); + + /* decode dlep dataitems */ + while (tvb_reported_length_remaining(tvb, offset) > 0) { + offset = decode_dataitem(tvb, offset, dlep_pt, pinfo); + } + + return tvb_captured_length(tvb); +} + +static gboolean +dissect_dlep_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) +{ + tcp_dissect_pdus(tvb, pinfo, tree, dlep_desegment, DLEP_MSG_HEADER_LEN, get_dlep_message_header_len, dissect_dlep_msg, data); + return tvb_reported_length(tvb); +} + +void +proto_register_dlep(void) +{ + module_t* dlep_module; + expert_module_t* dlep_expert_module; + + static hf_register_info hf[] = { + /* name, abbrev, type, display, strings, bitmask, blurb */ + { &hf_dlep_signal, + { "Signal", "dlep.signal", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_signal_signature, + { "Signature", "dlep.signal.signature", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_signal_type, + { "Signal Type", "dlep.signal.type", FT_UINT16, BASE_DEC, VALS(signal_type_vals), 0x0, NULL, HFILL } + }, + { &hf_dlep_signal_length, + { "Signal Length (bytes)", "dlep.signal.length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_message, + { "Message", "dlep.message", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_message_type, + { "Message Type", "dlep.message.type", FT_UINT16, BASE_DEC, VALS(message_type_vals), 0x0, NULL, HFILL } + }, + { &hf_dlep_message_length, + { "Message Length (bytes)", "dlep.message.length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem, + { "Data Item", "dlep.dataitem", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_type, + { "Type", "dlep.dataitem.type", FT_UINT16, BASE_DEC, VALS(dataitem_type_vals), 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_length, + { "Length (bytes)", "dlep.dataitem.length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_value, + { "Value", "dlep.dataitem.value", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_status, + { "Status", "dlep.dataitem.status", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_status_code, + { "Code", "dlep.dataitem.status.code", FT_UINT8, BASE_DEC, VALS(status_code_vals), 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_status_text, + { "Text", "dlep.dataitem.status.text", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v4conn, + { "IPv4 Connection Point", "dlep.dataitem.v4conn", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v4conn_flags, + { "Flags", "dlep.dataitem.v4conn.flags", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v4conn_flags_tls, + { "Use TLS Indicator", "dlep.dataitem.v4conn.flags.tls", FT_BOOLEAN, DLEP_DIT_V4CONN_FLAGMASK_BITLEN, TFS(&tfs_set_notset), DLEP_DIT_V4CONN_FLAGMASK_TLS, NULL, HFILL } + }, + { &hf_dlep_dataitem_v4conn_addr, + { "Address", "dlep.dataitem.v4conn.addr", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v4conn_port, + { "Port", "dlep.dataitem.v4conn.port", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v6conn, + { "IPv6 Connection Point", "dlep.dataitem.v6conn", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v6conn_flags, + { "Flags", "dlep.dataitem.v6conn.flags", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v6conn_flags_tls, + { "Use TLS Indicator", "dlep.dataitem.v6conn.flags.tls", FT_BOOLEAN, DLEP_DIT_V6CONN_FLAGMASK_BITLEN, TFS(&tfs_set_notset), DLEP_DIT_V6CONN_FLAGMASK_TLS, NULL, HFILL } + }, + { &hf_dlep_dataitem_v6conn_addr, + { "Address", "dlep.dataitem.v6conn.addr", FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v6conn_port, + { "Port", "dlep.dataitem.v6conn.port", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_peertype, + { "Peer Type", "dlep.dataitem.peertype", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_peertype_flags, + { "Flags", "dlep.dataitem.peertype.flags", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_peertype_flags_smi, + { "Secure Medium Indicator", "dlep.dataitem.peertype.flags.smi", FT_BOOLEAN, DLEP_DIT_PEERTYPE_FLAGMASK_BITLEN, TFS(&tfs_set_notset), DLEP_DIT_PEERTYPE_FLAGMASK_SMI, NULL, HFILL } + }, + { &hf_dlep_dataitem_peertype_description, + { "Text", "dlep.dataitem.peertype.description", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_heartbeat, + { "Heartbeat Interval (ms)", "dlep.dataitem.heartbeat", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_extsupp, + { "Extensions Supported", "dlep.dataitem.extsupp", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_extsupp_code, + { "Code", "dlep.dataitem.extsupp.code", FT_UINT32, BASE_DEC|BASE_RANGE_STRING, RVALS(extension_code_vals), 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_macaddr_eui48, + { "MAC Address", "dlep.dataitem.macaddr_eui48", FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_macaddr_eui64, + { "MAC Address", "dlep.dataitem.macaddr_eui64", FT_EUI64, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v4addr, + { "IPv4 Address", "dlep.dataitem.v4addr", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v4addr_flags, + { "Flags", "dlep.dataitem.v4addr.flags", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v4addr_flags_adddrop, + { "Add/Drop Indicator", "dlep.dataitem.v4addr.flags.adddrop", FT_BOOLEAN, DLEP_DIT_V4ADDR_FLAGMASK_BITLEN, TFS(&tfs_add_drop), DLEP_DIT_V4ADDR_FLAGMASK_ADDDROP, NULL, HFILL } + }, + { &hf_dlep_dataitem_v4addr_addr, + { "Address", "dlep.dataitem.v4addr.addr", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v6addr, + { "IPv6 Address", "dlep.dataitem.v6addr", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v6addr_flags, + { "Flags", "dlep.dataitem.v6addr.flags", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v6addr_flags_adddrop, + { "Add/Drop Indicator", "dlep.dataitem.v6addr.flags.adddrop", FT_BOOLEAN, DLEP_DIT_V6ADDR_FLAGMASK_BITLEN, TFS(&tfs_add_drop), DLEP_DIT_V6ADDR_FLAGMASK_ADDDROP, NULL, HFILL } + }, + { &hf_dlep_dataitem_v6addr_addr, + { "Address", "dlep.dataitem.v6addr.addr", FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v4subnet, + { "IPv4 Attached Subnet", "dlep.dataitem.v4subnet", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v4subnet_flags, + { "Flags", "dlep.dataitem.v4subnet.flags", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v4subnet_flags_adddrop, + { "Add/Drop Indicator", "dlep.dataitem.v4subnet.flags.adddrop", FT_BOOLEAN, DLEP_DIT_V4SUBNET_FLAGMASK_BITLEN, TFS(&tfs_add_drop), DLEP_DIT_V4SUBNET_FLAGMASK_ADDDROP, NULL, HFILL } + }, + { &hf_dlep_dataitem_v4subnet_subnet, + { "Subnet", "dlep.dataitem.v4subnet.subnet", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v4subnet_prefixlen, + { "Prefix Length", "dlep.dataitem.v4subnet.prefixlen", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v6subnet, + { "IPv6 Attached Subnet", "dlep.dataitem.v6subnet", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v6subnet_flags, + { "Flags", "dlep.dataitem.v6subnet.flags", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v6subnet_flags_adddrop, + { "Add/Drop Indicator", "dlep.dataitem.v6subnet.flags.adddrop", FT_BOOLEAN, DLEP_DIT_V6SUBNET_FLAGMASK_BITLEN, TFS(&tfs_add_drop), DLEP_DIT_V6SUBNET_FLAGMASK_ADDDROP, NULL, HFILL } + }, + { &hf_dlep_dataitem_v6subnet_subnet, + { "Subnet", "dlep.dataitem.v6subnet.subnet", FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_v6subnet_prefixlen, + { "Prefix Length", "dlep.dataitem.v6subnet.prefixlen", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_mdrr, + { "Maximum Data Rate (Receive) (bps)", "dlep.dataitem.mdrr", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_mdrt, + { "Maximum Data Rate (Transmit) (bps)", "dlep.dataitem.mdrt", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_cdrr, + { "Current Data Rate (Receive) (bps)", "dlep.dataitem.cdrr", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_cdrt, + { "Current Data Rate (Transmit) (bps)", "dlep.dataitem.cdrt", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_latency, + { "Latency (us)", "dlep.dataitem.latency", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_resources, + { "Resources (%)", "dlep.dataitem.resources", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_rlqr, + { "Relative Link Quality (Receive) (%)", "dlep.dataitem.rlqr", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_rlqt, + { "Relative Link Quality (Transmit) (%)", "dlep.dataitem.rlqt", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_mtu, + { "Maximum Transmission Unit (bytes)", "dlep.dataitem.mtu", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_hop_count_flags, + { "Flags", "dlep.dataitem.hop_count_flags", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_hop_count_flags_p, + { "P-Bit", "dlep.dataitem.hop_count_flags.p", FT_BOOLEAN, 8, TFS(&tfs_set_notset), DLEP_DIT_HOP_CNT_FLAGMASK_P, "Destination is potentially directly reachable", HFILL } + }, + { &hf_dlep_dataitem_hop_count_flags_reserved, + { "Reserved", "dlep.dataitem.hop_count_flags.reserved", FT_UINT8, BASE_HEX, NULL, DLEP_DIT_HOP_CNT_FLAGMASK_RESERVED, NULL, HFILL } + }, + { &hf_dlep_dataitem_hop_count, + { "Hop Count", "dlep.dataitem.hop_count", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_hop_control, + { "Hop Control", "dlep.dataitem.hop_control", FT_UINT16, BASE_DEC|BASE_RANGE_STRING, RVALS(hop_cntrl_action_vals), 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_li_length, + { "Link Identifier Length", "dlep.dataitem.link_identifier_length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_li, + { "Link Identifier", "dlep.dataitem.link_identifier", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_max_lat, + { "Maximum Latency (us)", "dlep.dataitem.max_latency", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } + }, + { &hf_dlep_dataitem_min_lat, + { "Minimum Latency (us)", "dlep.dataitem.min_latency", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } + } + }; + + static gint *ett[] = { + &ett_dlep, + &ett_dlep_dataitem, + &ett_dlep_flags + }; + + static ei_register_info ei[] = { + { &ei_dlep_signal_unexpected_length, { "dlep.signal.unexpected_length", PI_PROTOCOL, PI_WARN, "Message length does not match reported length remaining", EXPFILL }}, + { &ei_dlep_message_unexpected_length, { "dlep.message.unexpected_length", PI_PROTOCOL, PI_WARN, "Signal length does not match reported length remaining", EXPFILL }}, + { &ei_dlep_dataitem_unexpected_length, { "dlep.dataitem.unexpected_length", PI_PROTOCOL, PI_WARN, "Unexpected Data Item length", EXPFILL }}, + { &ei_dlep_dataitem_macaddr_unexpected_length, { "dlep.dataitem.macaddr.unexpected_length", PI_PROTOCOL, PI_WARN, "Unexpected MAC Address length", EXPFILL }}, + }; + + proto_dlep = proto_register_protocol("Dynamic Link Exchange Protocol", "DLEP", "dlep"); + dlep_msg_handle = register_dissector ("dlep.tcp", dissect_dlep_tcp, proto_dlep); + dlep_sig_handle = register_dissector ("dlep.udp", dissect_dlep_sig, proto_dlep); + + dlep_dataitem_table = register_dissector_table("dlep.dataitem", "DLEP Data Item Type", proto_dlep, FT_UINT16, BASE_DEC); + proto_dataitem = proto_register_protocol_in_name_only("DLEP Data Item Dissector", "DLEP Data Item", "dlep.dataitem", proto_dlep, FT_BYTES); + dissector_add_uint("dlep.dataitem", DLEP_DIT_STATUS, create_dissector_handle(decode_dataitem_status, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_V4CONN, create_dissector_handle(decode_dataitem_v4conn, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_V6CONN, create_dissector_handle(decode_dataitem_v6conn, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_PEERTYPE, create_dissector_handle(decode_dataitem_peertype, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_HEARTBEAT, create_dissector_handle(decode_dataitem_heartbeat, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_EXTSUPP, create_dissector_handle(decode_dataitem_extsupp, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_MACADDR, create_dissector_handle(decode_dataitem_macaddr, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_V4ADDR, create_dissector_handle(decode_dataitem_v4addr, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_V6ADDR, create_dissector_handle(decode_dataitem_v6addr, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_V4SUBNET, create_dissector_handle(decode_dataitem_v4subnet, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_V6SUBNET, create_dissector_handle(decode_dataitem_v6subnet, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_MDRR, create_dissector_handle(decode_dataitem_mdrr, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_MDRT, create_dissector_handle(decode_dataitem_mdrt, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_CDRR, create_dissector_handle(decode_dataitem_cdrr, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_CDRT, create_dissector_handle(decode_dataitem_cdrt, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_LAT, create_dissector_handle(decode_dataitem_latency, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_RES, create_dissector_handle(decode_dataitem_resources, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_RLQR, create_dissector_handle(decode_dataitem_rlqr, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_RLQT, create_dissector_handle(decode_dataitem_rlqt, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_MTU, create_dissector_handle(decode_dataitem_mtu, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_HOP_CNT, create_dissector_handle(decode_dataitem_hop_cnt, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_HOP_CNTRL, create_dissector_handle(decode_dataitem_hop_cntrl, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_LI_LENGTH, create_dissector_handle(decode_dataitem_li_length, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_LI, create_dissector_handle(decode_dataitem_li, proto_dataitem)); + dissector_add_uint("dlep.dataitem", DLEP_DIT_LAT_RANGE, create_dissector_handle(decode_dataitem_lat_range, proto_dataitem)); + + proto_register_field_array(proto_dlep, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + + dlep_module = prefs_register_protocol(proto_dlep, NULL); + prefs_register_bool_preference(dlep_module, "desegment", + "Reassemble DLEP messages spanning multiple TCP segments", + "Whether the DLEP dissector should reassemble messages spanning multiple TCP segments." + " To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.", + &dlep_desegment); + + dlep_expert_module = expert_register_protocol(proto_dlep); + expert_register_field_array(dlep_expert_module, ei, array_length(ei)); +} + +void +proto_reg_handoff_dlep(void) +{ + dissector_add_uint_range_with_preference("tcp.port", DLEP_TCP_PORT, dlep_msg_handle); + dissector_add_uint_range_with_preference("udp.port", DLEP_UDP_PORT, dlep_sig_handle); +} |