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packet-bnetp-w3gs.lua
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packet-bnetp-w3gs.lua
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local X = require('xproto')
local p = X.protocol('w3gs', 'Warcraft III Game Protocol',
{ key = 'bnetp.type', value = 0xF7 })
--[[
`request_packet_data` is a custom DSL construct that
calls the `request` method on the state object to perform
reassembly of TCP PDUs all in one place.
--]]
p.api.request_packet_data = function(proto, ...)
local args = proto.utils.make_args_table_with_positional_map(
{ 'keyref', 'already_consumed' },
...
)
if not args.keyref or type(args.keyref) ~= 'string' then
error('keyref parameter is a required value of type string'
.. package.loaded.debug.traceback()
)
end
if args.already_consumed and type(args.already_consumed) ~= 'number' then
error('already_consumed parameter is an optional number'
.. package.loaded.debug.traceback()
)
end
return {
args = args,
dissect = function(self, state)
local plen = state.packet[self.args.keyref]
state:request(plen - (self.args.already_consumed or 0))
end
}
end
--[[
-- slot([label])
--
-- Displays a slot struct.
-- Is equals to the sequence
--
-- p:uint8 {"Player Number"},
-- p:uint8 {"Download status"},
-- p:uint8 {"Slot status"},
-- p:uint8 {"Computer status"},
-- p:uint8 {"Team"},
-- p:uint8 {"Colour"},
-- p:uint8 {"Race"},
-- p:uint8 {"Computer type"},
-- p:uint8 {"Handicap"},
--
-- with some summary.
--
-- Quick call:
-- @par label Name of the field. It will be used as a label for the
-- field's node at the dissection tree.
--]]
p.api.slot = function(proto, ...)
local args = proto.utils.make_args_table_with_positional_map(
{ "label" },
...
)
local template = { protofield_type = "bytes" }
function template.size()
return 9
end
---@diagnostic disable-next-line: redefined-local
function template:dissect(state, proto)
local proto_node = state.proto_node
state.proto_node = proto_node:add(self.pf, state:peek(self.size()))
state:dissect_packets(proto, self.imp)
local summary = string.format("Slot %d", state.packet.pnum)
if (self.label ~= nil) then
summary = self.label .. ": " .. summary
end
state.proto_node:set_text(summary)
state.proto_node = proto_node
end
local imp = {
proto:uint8 { "Player Number", key = "pnum" },
proto:uint8 { "Download status" },
proto:uint8 { "Slot status" },
proto:uint8 { "Computer Status" },
proto:uint8 { "Teram" },
proto:uint8 { "Colour" },
proto:uint8 { "Race" },
proto:uint8 { "Computer Type" },
proto:uint8 { "Handicap" },
}
return {
args = args,
imp = imp,
register = function (self)
self.args.imp = proto.utils.map_table(
self.imp,
function (c)
if c.register then
return c:register()
else
return c
end
end
)
-- add a dummy label as it's required by create_proto_field
self.args.label = self.args.label or "Slot"
local label = self.args.label
local tmp = proto.utils.create_proto_field(proto, template, self.args)
tmp.label = label
return tmp
end
}
end
p:entrypoint {
p:lookahead_uint8_check(0xF7),
p:begin_packet(),
p:uint8 {
label = 'Header Type',
display = base.HEX,
key = 'type',
filter = 'type'
},
p:when {
p.conditions.keyEquals('isServerPacket', true),
{p:uint8 {
'Packet ID',
base.HEX,
p.descs.server_packets,
key = 'pid',
filter = 'pid'
}},
{p:uint8 {
'Packet ID',
base.HEX,
p.descs.client_packets,
key = 'pid',
filter = 'pid'
}},
},
p:uint16 {
label = 'Packet Length',
display = base.DEC,
key = 'plen',
filter = 'plen'
},
-- Before jumping to the corresponding packet description,
-- request all the data in this packet.
--
-- This is done for perfomace and also because `stringz`
-- can only request one byte at a time and some kind of
-- Wireshark reassembly limit is reached before the whole
-- packet can be dissected successfuly.
p:request_packet_data('plen', 4),
p:jump {
ref = 'pid',
ccollection = 'client_packets',
scollection = 'server_packets'
},
p:consume('plen'),
p:end_packet('plen'),
}
p:collection {
name = 'client_packets',
packets = {
--[[doc
Message ID: 0x1E
Message Name: W3GS_REQJOIN
Direction: Client -> Server (Sent)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: (DWORD) Host Counter (Game ID)
(DWORD) Entry Key (used in LAN)
(BYTE) Unknown
(WORD) Listen Port
(DWORD) Peer Key
(STRING) Player name
(BYTE)[] Unknown
(SOCKADDR) Internal
Remarks: A client sends this to the host to enter the game lobby.
The internal IP uses the Windows sockaddr_in structure.
Related: [0x05] W3GS_REJECTJOIN (S->C), [0x04] W3GS_SLOTINFOJOIN (S->C),
[0x06] W3GS_PLAYERINFO (S->C), [0x3D] W3GS_MAPCHECK (S->C)
]]
{
id = 0x1E,
name = "W3GS_REQJOIN",
def = {
p:uint32("Host Counter"),
p:uint32("Entry Key"),
p:uint8("Unknown"),
p:uint16("Listen Port"),
p:uint32("Peer Key"),
p:stringz("Player name"),
p:uint8{"Unknown", key="length"},
p:iterator{alias="none", label="Unknown", refkey="length", repeated={
p:uint8("Unknown")
}},
p:sockaddr("Socket"),
},
},
--[[doc
Message ID: 0x21
Message Name: W3GS_LEAVEREQ
Direction: Client -> Server (Sent)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: (DWORD) Reason
Remarks: A client requests to leave.
Reasons:
0x01 PLAYERLEAVE_DISCONNECT
0x07 PLAYERLEAVE_LOST
0x08 PLAYERLEAVE_LOSTBUILDINGS
0x09 PLAYERLEAVE_WON
0x0A PLAYERLEAVE_DRAW
0x0B PLAYERLEAVE_OBSERVER
0x0D PLAYERLEAVE_LOBBY
Related: [0x1E] W3GS_REQJOIN (C->S), [0x1B] W3GS_LEAVERES (S->C)
]]
{
id = 0x21,
name = "W3GS_LEAVEREQ",
def = {
p:uint32("Reason", nil, {
[0x01] = "PLAYERLEAVE_DISCONNECT",
[0x07] = "PLAYERLEAVE_LOST",
[0x08] = "PLAYERLEAVE_LOSTBUILDINGS",
[0x09] = "PLAYERLEAVE_WON",
[0x0A] = "PLAYERLEAVE_DRAW",
[0x0B] = "PLAYERLEAVE_OBSERVER",
[0x0D] = "PLAYERLEAVE_LOBBY",
}),
},
},
--[[doc
Message ID: 0x23
Message Name: W3GS_GAMELOADED_SELF
Direction: Client -> Server (Sent)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: [blank]
Remarks: The client sends this to the host when they have finished loading the
map.
Related: [0x08] W3GS_PLAYERLOADED (S->C), [0x0B] W3GS_COUNTDOWN_END (S->C)
]]
{
id = 0x23,
name = "W3GS_GAMELOADED_SELF",
def = {},
},
--[[doc
Message ID: 0x26
Message Name: W3GS_OUTGOING_ACTION
Direction: Client -> Server (Sent)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: (DWORD) CRC-32 encryption
(VOID) Action data
Remarks: A client sends this to the game host to execute an action in-game.
Related: [0x0C] W3GS_INCOMING_ACTION (S->C)
]]
{
id = 0x26,
name = "W3GS_OUTGOING_ACTION",
def = {
p:uint32("CRC-32 encryption"),
p:consume("plen", "Action data", 'action_data'),
},
},
--[[doc
Message ID: 0x27
Message Name: W3GS_OUTGOING_KEEPALIVE
Direction: Client -> Server (Sent)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: (BYTE)[] Unknown
Remarks: This is sent to the host from each client.
The unknown value may be a checksum and is also used in replays.
]]
{
id = 0x27,
name = "W3GS_OUTGOING_KEEPALIVE",
def = {
p:array("Unknown", p.uint8, 5),
},
},
--[[doc
Message ID: 0x28
Message Name: W3GS_CHAT_TO_HOST
Direction: Client -> Server (Sent)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: (BYTE) Total
For each total:
(BYTE) To player number
(BYTE) From player number
(BYTE) Flags
For Flag 0x10:
(STRING) Message
For Flag 0x11:
(BYTE) Team
For Flag 0x12:
(BYTE) Color
For Flag 0x13:
(BYTE) Race
For Flag 0x14:
(BYTE) Handicap
For Flag 0x20:
(DWORD) Extra Flags
(STRING) Message
Remarks: This is sent from the client to the host to send a message to the
other clients.
Related: [0x0F] W3GS_CHAT_FROM_HOST (S->C)
]]
{
id = 0x28,
name = "W3GS_CHAT_TO_HOST",
def = {
p:uint8("Total"),
p:uint8("To player number"),
p:uint8("From player number"),
p:uint8{"Flags", key="flags"},
p:casewhen{
{p.conditions.keyEquals("flags", 0x10), {
p:stringz("Message"),
}},
{p.conditions.keyEquals("flags", 0x11), {
p:uint8("Team"),
}},
{p.conditions.keyEquals("flags", 0x12), {
p:uint8("Color"),
}},
{p.conditions.keyEquals("flags", 0x13), {
p:uint8("Race"),
}},
{p.conditions.keyEquals("flags", 0x14), {
p:uint8("Handicap"),
}},
{p.conditions.keyEquals("flags", 0x20), {
p:uint32("Extra Flags"), --message scope
p:stringz("Message"),
}},
{p.conditions.always(), { --Probably never happens
p:stringz("Message"),
}},
},
},
},
--[[doc
Message ID: 0x2F
Message Name: W3GS_SEARCHGAME
Direction: Client -> Server (Sent)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: (DWORD) Product
(DWORD) Version
(DWORD) Unknown (0)
Remarks: This is sent to the entire local area network to detect games.
Product is either WAR3 or W3XP.
Related: [0x30] W3GS_GAMEINFO (S->C)
]]
{
id = 0x2F,
name = "W3GS_SEARCHGAME",
def = {
p:strdw("Product", p.descs.ClientTag),
p:uint32("Version"),
p:uint32("Unknown"),
},
},
--[[doc
Message ID: 0x35
Message Name: W3GS_PING_FROM_OTHERS
Direction: Client -> Server (Sent)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: [blank]
Remarks: Client requests an echo from another client (occurs every 10 seconds).
Related: [0x36] W3GS_PONG_TO_OTHERS (S->C)
]]
{
id = 0x35,
name = "W3GS_PING_FROM_OTHERS",
def = {},
},
--[[doc
Message ID: 0x37
Message Name: W3GS_CLIENTINFO
Message Status: MORE RESEARCH NEEDED
Direction: Client -> Server (Sent)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: (DWORD) Player Counter
(DWORD) Unknown (0)
(BYTE) Player number
(BYTE)[5] Unknown
Remarks: A client sends this to another client to gain information about self
when connected.
The first byte in the second unknown is possibly the status of the
player.
Packet Log:
F7 37 12 00
02 00 00 00
00 00 00 00
06
FF 5E 00 00 00
]]
{
id = 0x37,
name = "W3GS_CLIENTINFO",
def = {
p:uint32("Player Counter"),
p:uint32("Unknown"),
p:uint8("Player number"),
p:uint8("[5] Unknown"),
},
},
--[[doc
Message ID: 0x3F
Message Name: W3GS_STARTDOWNLOAD
Direction: Client -> Server (Sent)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: [blank]
Remarks: A client sends this to the host to initiate a map download.
Related: [0x3D] W3GS_MAPCHECK (S->C)
]]
{
id = 0x3F,
name = "W3GS_STARTDOWNLOAD",
def = {},
},
--[[doc
Message ID: 0x42
Message Name: W3GS_MAPSIZE
Direction: Client -> Server (Sent)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: (DWORD) Unknown
(BYTE) Size Flag
(DWORD) Map Size
Remarks: This is sent from the client to tell the host about the map file on
the client's local system.
]]
{
id = 0x42,
name = "W3GS_MAPSIZE",
def = {
p:uint32("Unknown"),
p:uint8("Size Flag"),
p:uint32("Map Size"),
},
},
--[[doc
Message ID: 0x44
Message Name: W3GS_MAPPARTOK
Direction: Client -> Server (Sent)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: (BYTE) To player number
(BYTE) From player number
(DWORD) Unknown
(DWORD) Chunk position in file
Remarks: The client sends this when it has successfully received a chunk of the
map file from the host client.
Related: [0x43] W3GS_MAPPART (S->C)
]]
{
id = 0x44,
name = "W3GS_MAPPARTOK",
def = {
p:uint8("To player number"),
p:uint8("From player number"),
p:uint32("Unknown"),
p:uint32("Chunk position in file"),
},
},
--[[doc
Message ID: 0x45
Message Name: W3GS_MAPPARTNOTOK
Message Status: MORE RESEARCH NEEDED
Direction: Client -> Server (Sent)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: [unknown]
Remarks: More research is required.
This is sent when downloading a map in reply to 0x43 W3GS_MAPPART and
a chunk of the map file does not match its CRC encryption.
Related: [0x43] W3GS_MAPPART (S->C), [0x44] W3GS_MAPPARTOK (C->S)
]]
{
id = 0x45,
name = "W3GS_MAPPARTNOTOK",
def = {
p:consume('plen', 'Unknown')
}
},
--[[doc
Message ID: 0x46
Message Name: W3GS_PONG_TO_HOST
Direction: Client -> Server (Sent)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: (DWORD) tickCount
Remarks: This is sent in response to 0x01 W3GS_HOSTECHOREQ.
The tickCount value is from GetTickCount().
Ping = (GetTickCount()-tickCount)/2
For the local area network, it can be 0.
Related: [0x01] W3GS_PING_FROM_HOST (S->C)
]]
{
id = 0x46,
name = "W3GS_PONG_TO_HOST",
def = {
p:uint32("tickCount"),
},
},
},
}
p:collection {
name = 'server_packets',
packets = {
--[[doc
Message ID: 0x01
Message Name: W3GS_PING_FROM_HOST
Direction: Server -> Client (Received)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: (DWORD) Tick Count
Remarks: This is sent every 30 seconds to make sure that the client is still
responsive.
Related: [0x46] W3GS_PONG_TO_HOST (C->S)
]]
{
id = 0x01,
name = "W3GS_PING_FROM_HOST",
def = {
p:uint32("tickCount"),
},
},
--[[doc
Message ID: 0x04
Message Name: W3GS_SLOTINFOJOIN
Direction: Server -> Client (Received)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: (WORD) Length of Slot Info
(BYTE) Number of slots
(BYTE)[] Slot data
(DWORD) Random seed
(BYTE) Game type
(BYTE) Number of player slots without observers
(BYTE) Player number
(SOCKADDR) Player's socket data
For each slot:
(BYTE) Player number
(BYTE) Download status
(BYTE) Slot status
(BYTE) Computer status
(BYTE) Team
(BYTE) Color
(BYTE) Race
(BYTE) Computer type (Difficulty)
(BYTE) Handicap
Remarks: This is sent to tell the client about the game slots, upon entry of
the lobby.
Download status is a percentage of their download progress. As such,
this value can only be between 0 and 100.
Slot statuses:
0x00 Open
0x01 Closed
0x02 Occupied
If the slot is a computer, then Computer will be 0x01, otherwise
it will be 0x00.
Available races:
0x01 Human
0x02 Orc
0x04 Night Elf
0x08 Undead
0x20 Random
0x40 Fixed
Computer types:
0x00 Easy
0x01 Normal / Human
0x02 Hard
Related: [0x1E] W3GS_REQJOIN (C->S)
]]
{
id = 0x04,
name = "W3GS_SLOTINFOJOIN",
def = {
p:uint16("Length of Slot Info"),
p:uint8{"Number of slots", key="length"},
p:iterator{alias="none", label="Slot data", refkey="length", repeated={
p:slot()
}},
p:uint32("Random seed"),
p:uint8("Game type"),
p:uint8("Number of player slots without observers"),
p:uint8("Player number"),
p:sockaddr("Socket"),
},
},
--[[doc
Message ID: 0x05
Message Name: W3GS_REJECTJOIN
Direction: Server -> Client (Received)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: (DWORD) Reason
Remarks: This is sent in a response to a request to join the game lobby and
indicates that the request was denied.
Reasons:
0x09 REJECTJOIN_FULL
0x10 REJECTJOIN_STARTED
0x27 REJECTJOIN_WRONGPASSWORD
Related: [0x1E] W3GS_REQJOIN (C->S)
]]
{
id = 0x05,
name = "W3GS_REJECTION",
def = {
p:uint32("Reason"),
},
},
--[[doc
Message ID: 0x06
Message Name: W3GS_PLAYERINFO
Message Status: MORE RESEARCH NEEDED
Direction: Server -> Client (Received)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: (DWORD) Player Counter
(BYTE) Player number
(STRING) Player name
(BYTE)[] Unknown
(SOCKADDR) External
(SOCKADDR) Internal
Remarks: Tells a client about a player's information.
The external and internal IP are always zero for the host.
NOTE: This packet needs a better structure in the Format. Until then,
you will have to deal with the unorganized fields.
]]
{
id = 0x06,
name = "W3GS_PLAYERINFO",
def = {
p:uint32("Player Counter"),
p:uint8("Player number"),
p:stringz("Player name"),
p:uint8{"Unknown", key="length"},
p:iterator{alias="none", label="Unknown", refkey="length", repeated={
p:uint8("Unknown")
}},
p:sockaddr("External Socket"),
p:sockaddr("Internal Socket"),
},
},
--[[doc
Message ID: 0x07
Message Name: W3GS_PLAYERLEFT
Direction: Server -> Client (Received)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: (BYTE) Player number
(DWORD) Reason
Remarks: This is received from the game host when a player leaves.
Reasons:
0x01 PLAYERLEAVE_DISCONNECT
0x07 PLAYERLEAVE_LOST
0x08 PLAYERLEAVE_LOSTBUILDINGS
0x09 PLAYERLEAVE_WON
0x0A PLAYERLEAVE_DRAW
0x0B PLAYERLEAVE_OBSERVER
0x0D PLAYERLEAVE_LOBBY
]]
{
id = 0x07,
name = "W3GS_PLAYERLEFT",
def = {
p:uint8("Player number"),
p:uint32("Reason"),
},
},
--[[doc
Message ID: 0x08
Message Name: W3GS_PLAYERLOADED
Direction: Server -> Client (Received)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: (BYTE) Player number
Remarks: Sent to all other clients in-game to notify that a player has finished
loading.
]]
{
id = 0x08,
name = "W3GS_PLAYERLOADED",
def = {
p:uint8("Player number"),
},
},
--[[doc
Message ID: 0x09
Message Name: W3GS_SLOTINFO
Direction: Server -> Client (Received)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: (WORD) Length of Slot Info
(BYTE) Number of slots
(BYTE)[] Slot data
(DWORD) Random seed
(BYTE) Game type
(BYTE) Number of player slots without observers
Slot Info:
(BYTE) Player number
(BYTE) Download status
(BYTE) Slot status
(BYTE) Computer status
(BYTE) Team
(BYTE) Color
(BYTE) Race
(BYTE) Computer type
(BYTE) Handicap
Remarks: This is sent for slot updates.
The length of slot info should always be 0x0B.
Related: [0x04] W3GS_SLOTINFOJOIN (S->C)
]]
{
id = 0x09,
name = "W3GS_SLOTINFO",
def = {
p:uint16("Length of Slot Info"),
p:uint8{"Number of slots", key="length"},
p:iterator{alias="none", label="Slot data", refkey="length", repeated={
p:slot()
}},
p:uint32("Random seed"),
p:uint8("Layout status", nil, {
[0x00] = "Melee",
[0x01] = "Custom forces",
[0x02] = "Fixed player settings",
[0x03] = "Custom forces and fixed player settings",
}),
p:uint8("Non-observer slots")
},
},
--[[doc
Message ID: 0x0A
Message Name: W3GS_COUNTDOWN_START
Direction: Server -> Client (Received)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: [blank]
Remarks: The game has begun the countdown to start.
The official clients countdown from 5 seconds, however it is possible
to use any time you wish. For example, the GHost++ bot uses 10 seconds
when auto-hosted, but 5 seconds when started using an administrative
command.
Related: [0x0B] W3GS_COUNTDOWN_END (S->C)
]]
{
id = 0x0A,
name = "W3GS_COUNTDOWN_START",
def = {},
},
--[[doc
Message ID: 0x0B
Message Name: W3GS_COUNTDOWN_END
Direction: Server -> Client (Received)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: [blank]
Remarks: The game has finished the countdown and has now started. Players
should see a loading screen for the map once this is received.
0x10 W3GS_COUNTDOWN_START should be received before this packet is,
even if there is no countdown.
Related: [0x0A] W3GS_COUNTDOWN_START (S->C)
]]
{
id = 0x0B,
name = "W3GS_COUNTDOWN_END",
def = {},
},
--[[doc
Message ID: 0x0C
Message Name: W3GS_INCOMING_ACTION
Direction: Server -> Client (Received)
Used By: Warcraft III: The Frozen Throne, Warcraft III
Format: (WORD) Send interval
(WORD) CRC-16 encryption