diff options
Diffstat (limited to 'epan/dissectors/packet-pathport.c')
| -rw-r--r-- | epan/dissectors/packet-pathport.c | 703 |
1 files changed, 703 insertions, 0 deletions
diff --git a/epan/dissectors/packet-pathport.c b/epan/dissectors/packet-pathport.c new file mode 100644 index 00000000..1f0bc613 --- /dev/null +++ b/epan/dissectors/packet-pathport.c @@ -0,0 +1,703 @@ +/* packet-pathport.c + * Routines for Pathport Protocol dissection + * Copyright 2014, Kevin Loewen <kloewen@pathwayconnect.com> + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1998 Gerald Combs + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "config.h" +#include <epan/packet.h> +#include <epan/to_str.h> +#include <wsutil/ws_roundup.h> + +#define PATHPORT_UDP_PORT 3792 /* Not IANA registered */ +#define PATHPORT_MIN_LENGTH 24 /* HEADER + 1 PDU */ +#define PATHPORT_PROTO_MAGIC 0xed01 + +#define PATHPORT_HEADER_OFFSET 0 +#define PATHPORT_HEADER_SRCID_OFFSET (PATHPORT_HEADER_OFFSET + 12) + +#define PATHPORT_HEADER_DSTID_OFFSET (PATHPORT_HEADER_OFFSET + 16) +#define PATHPORT_HEADER_LENGTH 20 +#define PATHPORT_HEADER_END (PATHPORT_HEADER_OFFSET + PATHPORT_HEADER_LENGTH) + +/** Rounds the specified integer up to the next multiple of four. */ +#define roof4(a) WS_ROUNDUP_4(a) + +void proto_reg_handoff_pathport(void); +void proto_register_pathport(void); + +static dissector_handle_t pathport_handle; + +/* Initialize the protocol and registered fields */ +static int proto_pathport = -1; + +/* Initialize the subtree pointers */ +static gint ett_pathport = -1; +static gint ett_pp_pdu = -1; +static gint ett_pp_tlv = -1; +static gint ett_pp_data = -1; + +static int hf_pp_prot = -1; +static int hf_pp_reserved = -1; +static int hf_pp_version = -1; +static int hf_pp_seq = -1; +static int hf_pp_src = -1; +static int hf_pp_dst = -1; +static int hf_pp_data_encoding = -1; +static int hf_pp_data_len = -1; +static int hf_pp_data_start_code = -1; +static int hf_pp_data_dst = -1; +static int hf_pp_data_levels = -1; +static int hf_pp_arp_id = -1; +static int hf_pp_arp_manuf = -1; +static int hf_pp_arp_class = -1; +static int hf_pp_arp_type = -1; +static int hf_pp_arp_numdmx = -1; +static int hf_pp_arp_ip = -1; +static int hf_pp_get_type = -1; +static int hf_pp_pdu_type = -1; +static int hf_pp_pdu_len = -1; +static int hf_pp_pdu_payload = -1; +static int hf_pp_pid_type = -1; +static int hf_pp_pid_len = -1; +static int hf_pp_pid_value = -1; +static int hf_pp_pid_pad_bytes = -1; + +/* Begin field and constant declarations */ +#define PP_ID_BCAST 0xffffffff +#define PP_ID_MCAST_ALL 0xefffedff +#define PP_ID_MCAST_DATA 0xefffed01 +#define PP_ID_MCAST_MANAGE 0xefffed02 + +/* Top Level PDU Types */ +#define PP_ARP_REQUEST 0x0301 +#define PP_ARP_REPLY 0x0302 +#define PP_ARP_INFO 0x0303 +#define PP_GET 0x0222 +#define PP_GET_REPLY 0x0223 +#define PP_DATA 0x0100 +#define PP_SET 0x0400 + +static const value_string pp_pdu_vals[] = { + {PP_ARP_REQUEST, "ARP Request"}, + {PP_ARP_REPLY, "ARP Reply"}, + {PP_ARP_INFO, "ARP Extend Info"}, + {PP_GET, "Get"}, + {PP_GET_REPLY, "Get Reply"}, + {PP_DATA, "XDMX Data"}, + {PP_SET, "Set"}, + {0, NULL} +}; + +/* XDMX Data Transport Encodings */ +#define PP_DATA_FLAT 0x0101 +#define PP_DATA_RELEASE 0x0103 + +/** Data encoding strings. */ +static const value_string pp_data_encoding_vals[] = { + {PP_DATA_FLAT, "Flat"}, + {PP_DATA_RELEASE, "Release"}, + {0, NULL} +}; + +/** ID strings. */ +static const value_string ednet_id_vals[] = { + {PP_ID_BCAST, "Broadcast"}, + {PP_ID_MCAST_ALL, "All"}, + {PP_ID_MCAST_DATA, "Data"}, + {PP_ID_MCAST_MANAGE, "Manage"}, + {0, NULL} +}; + +/* Configuration Property IDs */ +#define PP_PAD 0x0000 +#define PP_NODE_NAME 0x0401 +#define PP_PORT_NAME 0x0411 +#define PP_PATCH_NAME 0x0412 +#define PP_PORT_SPEED 0x0413 +#define PP_IS_BIDIRECTIONAL 0x0414 +#define PP_IS_PHYSICAL 0x0415 +#define PP_IS_MALE 0x0416 +#define PP_IS_SINK 0x0417 +#define PP_XDMX_COUNT 0x0418 +#define PP_ALT_START_CODE 0x041A +#define PP_MAX_PATCHES 0x041B +#define PP_NUM_PATCHES 0x041C +#define PP_TERMINATED 0x041E +#define PP_INPUT_PRIORITY 0x041F +#define PP_INPUT_PRIORITY_CHANNEL 0x0420 +#define PP_MAC 0x0421 +#define PP_IP 0x0422 +#define PP_NETMASK 0x0423 +#define PP_ROUTER 0x0424 +#define PP_PP_ID 0x0461 +#define PP_PP_ID_MASK 0x0462 +#define PP_PP_TX_DATA_DST 0x0463 +#define PP_BACKLIGHT 0x0481 +#define PP_SW_VERSION 0x0482 +#define PP_HW_TYPE 0x0483 +#define PP_LOADER_VERSION 0x0484 +#define PP_IDENTIFY 0x0485 +#define PP_IRENABLE 0x0486 +#define PP_SERIAL 0x0487 +#define PP_KEYPAD_LOCKOUT 0x0488 +#define PP_ARTNET_RX_ENABLE 0x0489 +#define PP_TX_PROTOCOL 0x048a +#define PP_SHOWNET_RX_ENABLE 0x048b +#define PP_LED_INTENSITY 0x048c +#define PP_JUMPER_CONFIGURED 0x048d +#define PP_SACN_RX_ENABLE 0x048e +#define PP_NET2_RX_ENABLE 0x048f +#define PP_PATHPORT_RX_ENABLE 0x0490 +#define PP_SACN_IS_DRAFT 0x0491 +#define PP_REBOOT 0x04a1 +#define PP_BOOTORDER 0x04a2 +#define PP_FACTORY_DEFAULT 0x04a4 +#define PP_TEST_LCD 0x04c1 +#define PP_IS_TERMINAL_BLOCK 0x04c2 +#define PP_IS_RACK_MOUNTED 0x04c3 +#define PP_IS_ENABLED 0x04c4 +#define PP_IS_DMX_ACTIVE 0x04c5 +#define PP_IS_XDMX_ACTIVE 0x04c6 +#define PP_SIGNAL_LOSS_HOLD_TIME 0x04c7 +#define PP_SIGNAL_LOSS_HOLD_FOREVER 0x04c8 +#define PP_SIGNAL_LOSS_FADE_ENABLE 0x04c9 +#define PP_SIGNAL_LOSS_FADE_TIME 0x04ca +#define PP_SIGNAL_LOSS_PORT_SHUTDOWN 0x04cb +#define PP_NET2_ADMIN_MCAST 0x04ce +#define PP_NET2_DATA_MCAST 0x04cf +#define PP_ROOMS_FEATURES 0x04d0 +#define PP_UNIVERSE_TEMP 0x04d1 +#define PP_CROSSFADE_TIME 0x04d2 +#define PP_CROSSFADE_ENABLE 0x04d3 +#define PP_IGNORE_INPUT_PRI 0x04d4 +#define PP_ARTNET_ALT_MAP 0x04d5 +#define PP_PATCH_CRC 0x04d6 +#define PP_CONF_CHANGE 0x04d7 +#define PP_PORT_ACTIVE_SUMMARY 0x04d8 +#define PP_SUPPORTED_UNIV 0x04d9 +#define PP_INPUT_HLL_TIME 0x04da +#define PP_PCP_ENABLE 0x04db +#define PP_INPUT_UNIVERSE 0x04dc +#define PP_MODEL_NAME 0x04dd +#define PP_MANUF_NAME 0x04de +#define PP_VER_STR 0x04df +#define PP_SERIAL_STR 0x04e0 +#define PP_NODE_NOTES 0x04e1 +#define PP_PORT_NOTES 0x04e2 +#define PP_USER_NODE_ID 0x04e3 +#define PP_MDG_GEN_STATE 0x0601 +#define PP_EMBEDDED_ID 0x0602 +#define PP_SLAVE_DMX_START 0x0603 +#define PP_TB_MODE 0x0605 +#define PP_LINK_MODE 0x0701 +#define PP_LINK_STATUS 0x0702 +#define PP_CONNECTED_COUNT 0x0703 +#define PP_POE_STATUS 0x0704 +#define PP_POE_EXTERN_WATT 0x0705 +#define PP_POE_CURRENT_WATT 0x0706 +#define PP_SFP_MODULE_TYPE 0x0707 +#define PP_POE_EXTERN_PRESENT 0x0708 +#define PP_POE_CAPABLE 0x0709 +#define PP_SWITCH_PORT_TYPE 0x070a +#define PP_POE_MAX_ALLOC_MW 0x070b +#define PP_POE_CURRENT_ALLOC_MW 0x070c +#define PP_VLAN_RANGE_START 0x070d +#define PP_VLAN_RANGE_END 0x070e +#define PP_VLAN_IS_TAGGED 0x070f +#define PP_VLAN_PORT_VID 0x0710 +#define PP_VLAN_MGMT_VID 0x0711 +#define PP_VLAN_ENABLE 0x0712 +#define PP_EAPS_MODE 0x0713 +#define PP_EAPS_VLAN 0x0714 +#define PP_EAPS_PRI_PORT 0x0715 +#define PP_EAPS_SEC_PORT 0x0716 +#define PP_LLDP_PARTNER_MAC 0x0717 +#define PP_LLDP_PARTNER_PORT 0x0718 +#define PP_ET_PARAM_1 0x1101 +#define PP_END 0xffff + +/** Property strings. */ +static const value_string pp_pid_vals[] = { + {PP_PAD, "Pad"}, + {PP_NODE_NAME, "Node Name"}, + {PP_PORT_NAME, "Port Name"}, + {PP_PATCH_NAME, "Patch Name"}, + {PP_PORT_SPEED, "Port Speed"}, + {PP_IS_BIDIRECTIONAL, "Bi Directional"}, + {PP_IS_PHYSICAL, "Physical"}, + {PP_IS_MALE, "Is Male"}, + {PP_IS_SINK, "Is Sink"}, + {PP_XDMX_COUNT, "XDMX Channel Count"}, + {PP_ALT_START_CODE, "Alt Start Code List"}, + {PP_MAX_PATCHES, "Max # Patches"}, + {PP_NUM_PATCHES, "Current # Patches"}, + {PP_TERMINATED, "Is Terminated"}, + {PP_INPUT_PRIORITY, "Input Priority (Static)"}, + {PP_INPUT_PRIORITY_CHANNEL, "Input Priority Channel"}, + {PP_MAC, "Ethernet Address"}, + {PP_IP, "IP Address"}, + {PP_NETMASK, "IP Netmask"}, + {PP_ROUTER, "Default Router"}, + {PP_PP_ID, "Pathport ID"}, + {PP_PP_ID_MASK, "Pathport ID Mask"}, + {PP_PP_TX_DATA_DST, "Pathport Data Transmit Offset"}, + {PP_BACKLIGHT, "Backlight"}, + {PP_SW_VERSION, "Software Version"}, + {PP_HW_TYPE, "Hardware Type"}, + {PP_LOADER_VERSION, "Loader Version"}, + {PP_IDENTIFY, "Identify"}, + {PP_IRENABLE, "IR Enable"}, + {PP_SERIAL, "Serial Number"}, + {PP_KEYPAD_LOCKOUT, "Front Panel Lockout"}, + {PP_ARTNET_RX_ENABLE, "ArtNet Rx Enable"}, + {PP_TX_PROTOCOL, "Data Tx Proto"}, + {PP_SHOWNET_RX_ENABLE, "Shownet Rx Enable"}, + /* XXX: PP_LED_INTENSITY ?? */ + {PP_JUMPER_CONFIGURED, "Universe Patched By Jumper"}, + {PP_SACN_RX_ENABLE, "sACN (E1.31) Rx Enable"}, + {PP_NET2_RX_ENABLE, "ETCNet2 Rx Enable"}, + {PP_PATHPORT_RX_ENABLE, "xDMX Rx Enable"}, + {PP_SACN_IS_DRAFT, "sACN TX is Draft"}, + {PP_REBOOT, "Reboot"}, + {PP_BOOTORDER, "Boot Order"}, + {PP_FACTORY_DEFAULT, "Factory Default"}, + {PP_TEST_LCD, "Test LCD"}, + /* XXX: PP_IS_TERMINAL_BLOCK ?? */ + /* XXX: PP_IS_RACK_MOUNTED ?? */ + {PP_IS_ENABLED, "Port Enable"}, + {PP_IS_DMX_ACTIVE , "DMX Active"}, + {PP_IS_XDMX_ACTIVE , "xDMX Active"}, + {PP_SIGNAL_LOSS_HOLD_TIME, "Signal Loss Hold Time (DMX OUT)"}, + {PP_SIGNAL_LOSS_HOLD_FOREVER , "Signal Loss Infinite Hold"}, + {PP_SIGNAL_LOSS_FADE_ENABLE, "Signal Loss Fade Enable"}, + {PP_SIGNAL_LOSS_FADE_TIME, "Signal Loss Fade Time"}, + {PP_SIGNAL_LOSS_PORT_SHUTDOWN, "Signal Loss Port Shutdown"}, + /* XXX: PP_NET2_ADMIN_MCAST ?? */ + /* XXX: PP_NET2_DATA_MCAST ?? */ + /* XXX: PP_ROOMS_FEATURES ?? */ + {PP_UNIVERSE_TEMP, "xDMX Universe"}, + {PP_CROSSFADE_TIME, "Crossfade Time(ms)"}, + {PP_CROSSFADE_ENABLE, "Crossfade Enable"}, + {PP_IGNORE_INPUT_PRI, "Ignore Input Priority"}, + {PP_ARTNET_ALT_MAP, "ArtNet Alternate Univ Mapping"}, + {PP_PATCH_CRC, "Output Patch File CRC"}, + {PP_CONF_CHANGE, "Config Change Notify"}, + {PP_PORT_ACTIVE_SUMMARY, "Port Active Bitmap"}, + {PP_SUPPORTED_UNIV, "Number Supported Univ"}, + {PP_INPUT_HLL_TIME, "Signal Loss Hold Time (DMX IN)"}, + {PP_PCP_ENABLE, "Per Channel Priority Enable"}, + {PP_INPUT_UNIVERSE, "Input Universe"}, + {PP_MODEL_NAME, "Model Name"}, + {PP_MANUF_NAME, "Manufacturer Name"}, + {PP_VER_STR, "Firmware Ver (String)"}, + {PP_SERIAL_STR, "Serial Number (String)"}, + {PP_NODE_NOTES, "Node User Notes"}, + {PP_PORT_NOTES, "Port User Notes"}, + {PP_USER_NODE_ID, "User Node ID"}, + {PP_MDG_GEN_STATE, "MDG Generator Status"}, + {PP_EMBEDDED_ID, "Embedded Device ID"}, + {PP_SLAVE_DMX_START, "Embedded Device DMX Address"}, + {PP_TB_MODE, "RDM Discovery Enable"}, + {PP_LINK_MODE, "Ethernet Link Mode"}, + {PP_LINK_STATUS, "Ethernet Link Status"}, + {PP_CONNECTED_COUNT, "Connected PP Devices"}, + {PP_POE_STATUS, "PoE Status"}, + {PP_POE_EXTERN_WATT, "PoE External Supply Wattage"}, + {PP_POE_CURRENT_WATT, "PoE Current Supply Wattage"}, + {PP_SFP_MODULE_TYPE, "SFP Module Type"}, + {PP_POE_EXTERN_PRESENT, "PoE External Supply Present"}, + {PP_POE_CAPABLE, "PoE Capable Port"}, + {PP_SWITCH_PORT_TYPE, "Ethernet Port Type"}, + {PP_POE_MAX_ALLOC_MW, "PoE Max Alloc mW"}, + {PP_POE_CURRENT_ALLOC_MW, "PoE Current Alloc mW"}, + {PP_VLAN_RANGE_START, "VLAN Range Start"}, + {PP_VLAN_RANGE_END, "VLAN Range End"}, + {PP_VLAN_IS_TAGGED, "VLAN Port is Tagged"}, + {PP_VLAN_PORT_VID, "VLAN Port VID"}, + {PP_VLAN_MGMT_VID, "VLAN Management VID"}, + {PP_VLAN_ENABLE, "VLAN Enable"}, + {PP_EAPS_MODE, "EAPS Mode"}, + {PP_EAPS_VLAN, "EAPS Control VLAN"}, + {PP_EAPS_PRI_PORT, "EAPS Primary Port"}, + {PP_EAPS_SEC_PORT, "EAPS Secondary Port"}, + {PP_LLDP_PARTNER_MAC, "LLDP Partner MAC"}, + {PP_LLDP_PARTNER_PORT, "LLDP Partner Port"}, + /* XXX: ET_PARAM ?? */ + {PP_END, "End"}, + {0, NULL} +}; + +static value_string_ext pp_pid_vals_ext = VALUE_STRING_EXT_INIT(pp_pid_vals); + +/** Unknown type format. */ +#define TYPE_UNKNOWN "Unknown (%04x)" + +/* End Field and enum declarations */ + + +/* Code to actually dissect the packets */ +static guint dissect_one_tlv(tvbuff_t *tvb, proto_tree *tree, + guint offset) +{ + proto_item *ti; + proto_tree *tlv_tree = proto_tree_add_subtree(tree, tvb, offset, 0, ett_pp_tlv, &ti, "Property"); + + guint len; + guint pad_len; + + guint type = tvb_get_ntohs(tvb, offset); + const char *name = val_to_str_ext(type, &pp_pid_vals_ext, TYPE_UNKNOWN); + proto_item_append_text(ti, " : %s", name); + + proto_tree_add_item(tlv_tree, hf_pp_pid_type, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + + len = tvb_get_ntohs(tvb, offset); + proto_item_set_len(ti, 4 + len); + + proto_tree_add_item(tlv_tree, hf_pp_pid_len, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + + proto_tree_add_item(tlv_tree, hf_pp_pid_value, tvb, offset, len, ENC_NA); + offset += len; + + pad_len = ~(offset-1) & 3; + if(pad_len) + { + proto_tree_add_item(tlv_tree, hf_pp_pid_pad_bytes, tvb, offset, pad_len, ENC_NA); + offset += pad_len; + } + return offset; +} + + +static guint +dissect_multiple_tlvs(tvbuff_t *tvb, proto_item *ti, + guint offset, guint len) +{ + guint end = offset + len; + while(offset < end) { + offset = dissect_one_tlv(tvb, ti, offset); + } + return offset; +} + +static guint +dissect_multiple_get_pids(tvbuff_t *tvb, proto_item *tree, guint offset, guint len) +{ + guint end = offset + len; + + while(offset < end) + { + proto_tree_add_item(tree, hf_pp_get_type, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + } + return len; +} + +static guint +dissect_data_payload(tvbuff_t *tvb, proto_item *tree, guint offset, guint len) +{ + guint end = offset + len; + guint blklen = 0; + guint xdmx, stc; + + while(offset < end) + { + proto_item *ti; + proto_tree *data_tree = proto_tree_add_subtree(tree, tvb, offset, 0, ett_pp_data, &ti, "xDMX Data: "); + proto_tree_add_item(data_tree, hf_pp_data_encoding, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + blklen = tvb_get_ntohs(tvb, offset); + proto_tree_add_item(data_tree, hf_pp_data_len, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + proto_tree_add_item(data_tree, hf_pp_reserved, tvb, offset++, 1, ENC_NA); + stc = tvb_get_guint8(tvb, offset); + proto_tree_add_item(data_tree, hf_pp_data_start_code, tvb, offset++, 1, ENC_BIG_ENDIAN); + xdmx = tvb_get_ntohs(tvb, offset); + proto_tree_add_item(data_tree, hf_pp_data_dst, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + proto_tree_add_item(data_tree, hf_pp_data_levels, tvb, offset, blklen, ENC_NA); + proto_item_append_text(ti, "%d Channels at xDMX %d (Univ %d.%d) StartCode: %d ", blklen, xdmx, xdmx / 512 + 1, xdmx % 512, stc); + offset += roof4(blklen); + } + return len; +} + +static guint +dissect_arp_reply(tvbuff_t *tvb, proto_tree *tree, guint offset, guint len) +{ + proto_tree_add_item(tree, hf_pp_arp_id, tvb, offset, 4, ENC_BIG_ENDIAN); + offset += 4; + proto_tree_add_item(tree, hf_pp_arp_ip, tvb, offset, 4, ENC_NA); + offset += 4; + proto_tree_add_item(tree, hf_pp_arp_manuf, tvb, offset++, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(tree, hf_pp_arp_class, tvb, offset++, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(tree, hf_pp_arp_type, tvb, offset++, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(tree, hf_pp_arp_numdmx, tvb, offset++, 1, ENC_BIG_ENDIAN); + return len; +} + +static guint +dissect_one_pdu(tvbuff_t *tvb, proto_tree *tree, guint offset) +{ + proto_item *ti; + proto_tree *pdu_tree = proto_tree_add_subtree(tree, tvb, offset, 0, ett_pp_pdu, &ti, "PDU"); + + guint len; + + guint type = tvb_get_ntohs(tvb, offset); + const char *name = val_to_str(type, pp_pdu_vals, TYPE_UNKNOWN); + + proto_item_append_text(ti, " : %s", name); + + proto_tree_add_item(pdu_tree, hf_pp_pdu_type, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + + len = tvb_get_ntohs(tvb, offset); + proto_item_set_len(ti, 4 + len); + + proto_tree_add_item(pdu_tree, hf_pp_pdu_len, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + + switch(type) + { + case PP_ARP_REPLY : + dissect_arp_reply(tvb, pdu_tree, offset, len); + break; + case PP_GET : + dissect_multiple_get_pids(tvb, pdu_tree, offset, len); + break; + case PP_SET : + case PP_GET_REPLY : + case PP_ARP_INFO : + dissect_multiple_tlvs(tvb, pdu_tree, offset, len); + break; + case PP_DATA : + dissect_data_payload(tvb, pdu_tree, offset, len); + break; + default: + proto_tree_add_item(pdu_tree, hf_pp_pdu_payload, tvb, offset, len, ENC_NA); + break; + } + offset += roof4(len); + return offset; +} + +static guint +dissect_multiple_pdus(tvbuff_t *tvb, proto_item *ti, + guint offset, guint len) +{ + guint end = offset + len; + while(offset < end) { + offset = dissect_one_pdu(tvb, ti, offset); + } + return offset; +} + +static int +dissect_header(tvbuff_t *tvb, proto_tree *parent, guint offset) +{ + proto_tree *tree = proto_tree_add_subtree(parent, tvb, offset, PATHPORT_HEADER_LENGTH, ett_pathport, NULL, "Header"); + + proto_tree_add_item(tree, hf_pp_prot, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + proto_tree_add_item(tree, hf_pp_version, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + proto_tree_add_item(tree, hf_pp_seq, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + proto_tree_add_item(tree, hf_pp_reserved, tvb, offset, 6, ENC_NA); + offset += 6; + proto_tree_add_item(tree, hf_pp_src, tvb, offset, 4, ENC_BIG_ENDIAN); + offset += 4; + proto_tree_add_item(tree, hf_pp_dst, tvb, offset, 4, ENC_BIG_ENDIAN); + offset += 4; + return offset; +} + +static gboolean +packet_is_pathport(tvbuff_t *tvb) +{ + if(tvb_captured_length(tvb) < PATHPORT_MIN_LENGTH) + return FALSE; + + if(tvb_get_ntohs(tvb, 0) != PATHPORT_PROTO_MAGIC) + return FALSE; + /* could also check that the first PDU is in our list of supported PDUs */ + + return TRUE; +} + +/** Resolves the specified ID to a name. */ +static const char * +resolve_pp_id(guint32 id) +{ + return val_to_str(id, ednet_id_vals, "%X"); +} + +static int dissect_pathport_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + /* Set up structures needed to add the protocol subtree and manage it */ + proto_item *ti; + proto_tree *pathport_tree; + guint offset = 0; + guint remaining_len; + guint len; + guint16 type; + guint32 srcid; + guint32 dstid; + + len = tvb_reported_length(tvb); + + /* Set the Protocol column to the constant string of Pathport */ + col_set_str(pinfo->cinfo, COL_PROTOCOL, "Pathport"); + + /* Set the info column to reflect the first PDU in the packet */ + col_clear(pinfo->cinfo, COL_INFO); + srcid = tvb_get_ntohl(tvb, PATHPORT_HEADER_SRCID_OFFSET); + type = tvb_get_ntohs(tvb, PATHPORT_HEADER_LENGTH); + + if(type == PP_ARP_REQUEST) + { + dstid = tvb_get_ntohl(tvb, PATHPORT_HEADER_DSTID_OFFSET); + col_add_fstr(pinfo->cinfo, COL_INFO, "Who has %s? Tell %s", + resolve_pp_id(dstid), resolve_pp_id(srcid)); + } + else + { + if((type == PP_ARP_REPLY) && (len >= 36)) + { + guint32 id = tvb_get_ntohl(tvb, 24); + col_add_fstr(pinfo->cinfo, COL_INFO, "%s is at %s", resolve_pp_id(id), tvb_ip_to_str(pinfo->pool, tvb, 28)); + } + else if((type == PP_DATA) && (len >= 32)) + { + guint16 xdmx_start = tvb_get_ntohs(tvb, 30); + col_add_fstr(pinfo->cinfo, COL_INFO, "xDMX Data - %d channels @ %d (Univ %d.%d)", + tvb_get_ntohs(tvb, 26), + xdmx_start, xdmx_start / 512 + 1, xdmx_start % 512); + } + else /* default */ + { + col_add_str(pinfo->cinfo, COL_INFO, val_to_str(type, pp_pdu_vals, TYPE_UNKNOWN)); + } + } + if(tree == NULL) + return tvb_reported_length(tvb); + + /* create display subtree for the protocol */ + ti = proto_tree_add_item(tree, proto_pathport, tvb, 0, -1, ENC_NA); + + pathport_tree = proto_item_add_subtree(ti, ett_pathport); + offset = dissect_header(tvb, pathport_tree, PATHPORT_HEADER_OFFSET); + remaining_len = tvb_reported_length_remaining(tvb, offset); + offset = dissect_multiple_pdus(tvb, tree, offset, remaining_len); + + return offset; +} + +static int +dissect_pathport(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, + void *data _U_) +{ + if(!packet_is_pathport(tvb)) + return 0; + return dissect_pathport_common(tvb, pinfo, tree); +} + +static gboolean +dissect_pathport_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) +{ + if(!packet_is_pathport(tvb)) + return FALSE; + + dissect_pathport_common(tvb, pinfo, tree); + return (TRUE); +} + +/* Register the protocol with Wireshark. + */ +void +proto_register_pathport(void) +{ + static hf_register_info hf[] = { +/* Packet Header */ + {&hf_pp_prot, {"Protocol", "pathport.prot", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + {&hf_pp_reserved, {"Reserved", "pathport.resv", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}, + {&hf_pp_version, {"Version", "pathport.version", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + {&hf_pp_seq, {"Sequence", "pathport.seq", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + {&hf_pp_src, {"Source ID", "pathport.src", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + {&hf_pp_dst, {"Destination ID", "pathport.dst", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + +/* PDU Header */ + {&hf_pp_pdu_type, {"PDU", "pathport.pdu", FT_UINT16, BASE_HEX, VALS(pp_pdu_vals), 0x0, NULL, HFILL }}, + {&hf_pp_pdu_len, {"Length", "pathport.len", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + {&hf_pp_pdu_payload, {"Payload", "pathport.payload", FT_BYTES, 0, NULL, 0x0, NULL, HFILL }}, + +/* Property structures */ + {&hf_pp_get_type, {"Get", "pathport.get.pid", FT_UINT16, BASE_HEX | BASE_EXT_STRING, &pp_pid_vals_ext, 0x0, NULL, HFILL }}, + {&hf_pp_pid_type, {"Property", "pathport.pid", FT_UINT16, BASE_HEX | BASE_EXT_STRING, &pp_pid_vals_ext, 0x0, NULL, HFILL }}, + {&hf_pp_pid_len, {"Length", "pathport.pid.len", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, + {&hf_pp_pid_value, {"Value", "pathport.pid.value", FT_BYTES, 0, NULL, 0x0, NULL, HFILL }}, + {&hf_pp_pid_pad_bytes, {"Pad bytes", "pathport.pid.pad_bytes", FT_BYTES, 0, NULL, 0x0, NULL, HFILL }}, + +/* Pathport XDMX Data */ + {&hf_pp_data_encoding, {"Data Encoding", "pathport.data.encoding", FT_UINT16, BASE_HEX, VALS(pp_data_encoding_vals), 0x0, NULL, HFILL }}, + {&hf_pp_data_start_code, {"DMX Start Code", "pathport.data.startcode", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + {&hf_pp_data_len, {"Data Length", "pathport.data.len", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + {&hf_pp_data_dst, {"xDMX Destination", "pathport.data.dst", FT_UINT16, BASE_HEX, NULL, 0x0,NULL, HFILL }}, + {&hf_pp_data_levels, {"Levels", "pathport.data.levels", FT_NONE, 0, NULL, 0x0, NULL, HFILL }}, + +/* PP_ARP Reply structures */ + {&hf_pp_arp_id, {"ID", "pathport.arp.id", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + {&hf_pp_arp_manuf, {"Manufacturer", "pathport.arp.manuf", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + {&hf_pp_arp_class, {"Device Class", "pathport.arp.class", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + {&hf_pp_arp_type, {"Device Type", "pathport.arp.type", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + {&hf_pp_arp_numdmx, {"Subcomponents", "pathport.arp.numdmx", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, + {&hf_pp_arp_ip, {"IP", "pathport.arp.ip", FT_IPv4, 0, NULL, 0x0, NULL, HFILL }} + }; + + /* Setup protocol subtree array */ + static gint *ett[] = { + &ett_pathport, + &ett_pp_pdu, + &ett_pp_tlv, + &ett_pp_data + }; + + /* Register the protocol name and description */ + proto_pathport = proto_register_protocol("Pathport Protocol", "Pathport", "pathport"); + + /* Required function calls to register the header fields and subtrees */ + proto_register_field_array(proto_pathport, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + + /* Register the dissector handle */ + pathport_handle = register_dissector("pathport", dissect_pathport, proto_pathport); +} + +void +proto_reg_handoff_pathport(void) +{ + heur_dissector_add("udp", dissect_pathport_heur, "Pathport over UDP", "pathport_udp", proto_pathport, HEURISTIC_ENABLE); + dissector_add_uint_with_preference("udp.port", PATHPORT_UDP_PORT, pathport_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: + */ |