Network Protocol/Server/gpcm.gs.nintendowifi.net

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Server gpcm.gs.nintendowifi.net

Client and server communicate using the PARAM-STRING protocol. The server is listening at TCP port 29900. This server has many records:

This is an old table. The content will be migrated to the other section.

Parameters

The following table shows all parameters. For some parameters which open a parameter list the value is so important, that it is part of the name.

Protocol Parameters
Name Sender Param
Type		 Description
addbuddy client empty First parameter of a addbuddy list: Add a profile id to the friends list.
authadd client empty This is an authentication prefix for addbuddy.
authtoken client char(3)+base64 The 3 characters »NDS« followed by a BASE64 coded string with 96 decoded bytes.
bdy server integer Amount of people on the buddy list. It follows a comma-seperated list "\list\" with the player-ids.
blk server integer Amount of people on the block list. It follows a comma-seperated list "\list\" with the player-ids.
bm=1 both "1" BM_MESSAGE.
bm=2 server "2" BM_REQUEST. First parameter of a bm=2 list. It is send by the server to inform that an other users added the player.
bm=4 server "4" BM_AUTH. First parameter of a bm=4 list. It is send by the server as success message for an addbuddy list.
bm=6 server "6" BM_REVOKE. Not used by MKWii. In other games, the server can remove a buddy out of the local friend list.
bm=100 server "100" BM_STATUS. A bm=100 list (buddy message) is send when a buddy (friend) changes its online status.
challenge both char(10,32) Server/client-challenge during login. Strings with either 10 or 32 characters seen.
date server integer Timestamp in seconds since epoch (1970-01-01 00:00:00).
delbuddy client empty First parameter of a delbuddy list. The list is send when a player removes a friend from its friends list.
delprofileid client profile id The profile id to delete from the friends list. This parameter is only used with the delbuddy list.
email server nick+char(4) The user nick (same as uniquenick) with an appended »@nds«.
err server integer An error code as part of an error list.
errmsg server string An error message as part of an error list.
error server empty Starts an error list.
f server profile id f (like from) is the profile id of bm lists. It indicates the sender of this message.
final both empty Last parameter of a parameter list. One or more parameter lists may follow.
firewall client integer This is always set to 1 (hardcoded in game), since nobody has a public IP (no NAT) at the Wii.
firstname both char(25) The firstname is the prefix "Wii:", then your Wii-FC without minus signs, then "@" and then the ID4 of the game.

Example for MKWii: Wii:1234567890123456@RMCP (for Wii-FC 1234-5678-9012-3456)

fromprofileid client profile id The profile id.
gamename client string The Gamespy-Gamename. For MKWii, it's "mariokartwii".
getprofile client empty The client requests the full profile for a profile id.
id both integer This ID is a sequence ID - each answer to a question has the same ID as the question.
ka both empty Simple keepalive packet.
lastname server user nick The user nick with the first 9 characters (Wii part) replaced by »000000000«.
lat server float This is the latitude of a geographic coordinate. Only value 0.000000 seen yet. (Nintendo doesn't use this).
lc=1 server "1" Login step 1
lc=2 server "2" Login step 2
loc server empty ?
locstring client BASE64 A BASE64 coded string with 8 decoded bytes. It contains information about the status of the player.
login client empty This is sent while logging in.
logout client empty This is sent while logging out.
lon server float This is the longitude of a geographic coordinate. Only value 0.000000 seen yet. (Nintendo doesn't use this)
lt server char(24) A loginticket.
msg both string Any message sent to / received from the server.
namespaceid client integer Only value 16 seen yet. May indicate the protocol version.
newprofileid client profile id Parameter for the addbuddy list: Add this profile id to the friends list.
nick server user nick The user nick of the client user. Same as uniquenick.
partnerid client integer Only value 11 seen yet. Probably the same as pid.
pi server empty This is sent while generating a new profile.
pid server integer Only value 11 seen yet. Probably the same as partnerid.
port client integer Only value 0 seen yet.
productid client integer Only value 11059 seen yet.
profileid both profile id The profile id.
proof server MD5 The proof is a MD5-hash out of the following string:
"<MD5 from SSL-challenge><48x space><authtoken><server-challenge><client-challenge><MD5 from SSL-challenge>"
quiet client integer Only value 0 seen yet.
rar server ? ?
reason client empty Always empty in MKWii. In other games this parameter is used to send a short comment to the other player.
response client MD5 The response is a MD5-hash out of the following string:
"<MD5 from SSL-challenge><48x space><authtoken><client-challenge><server-challenge><MD5 from SSL-challenge>"
sdkrevision client integer Only value 3 seen yet.
sesskey both integer A Session-ID
sig both MD5 ?
statstring client subparam This parameter is used in status lists and with alias ss in bm=100 lists. Its format is: /SCM/<max>/SCN/<num>/VER/<vers>. For <max> values 1 and 12 seen, for <num> (number of) values 0–12 and for <vers> only value 90.
status client integer This is the first parameter of a status list.

The value tells the server the local status: 0:offline, 1:online, 2:playing, 3:changing role, 4:room entered, 5:host of room. The status is distributed by a bm=100 list.

t client profile id t (like to) is the profile id of bm lists. It indicates the receiver of this message.
uniquenick server user nick The translated user nick.
updatepro client empty The client updates his profile at the server with new information.
userid server integer Your User-ID

Here is a list of found parameters for further analysis: param-of-server-gpcm.list (3.8 MB text file)

The Wiimmfi GPCM server adds some more records to the stream:

Parameter Lists

The following parameter lists have been found yet. The name of the first parameter is used as caption. See PARAM-STRING for the protocol and the naming convention.

addbuddy

If adding a user either by entering the friend code or by clicking the »New Friend« button in a room, the client send this message: 

    addbuddy =
     sesskey = <sesssion_key>
newprofileid = <profile id>
      reason =
       final /

The server replies a bm=4 list on success or a error list on faulure.

authadd

Client sends: 

authadd,sesskey=,fromprofileid=,sig=,final

bm

The parameter "t" only exists in messages to the server, the parameter "f" only exists in messages from the server.

bm=1

???
Send by client and server (maybe room infos): 

     bm = 1
sesskey = <session_key>
      t = <profile id>
    msg = GPCM90vMAT<control><base64>

msg starts always with string »GPCM90vMAT«, followed by a control character (ASCII codes 1 – 6 and 16) and a BASE64 coded string of different length.

msg
Control BASE64:
decoded
length		 Description
1 36 Ask for permission to enter room. The decoded data is almost little endian and equal to STATUS Type 0x01 without the message header.
2 52 Permission granted. The decoded data is almost little endian and equal to STATUS Type 0x02 without the message header.
3 4 Access denied, room full. 1st byte is 0x11 or 0x12 and indicates player count as BCD, all others are 0x00.
4 — Unknown.
5 — Unknown.
6 8 Connecting.
16 4 Unknown.

The data has the same format as transmitted in the masterserver-Record 0x06 (click). Detailed information for each record can be found there.

bm=5, bm=102 and bm=103 have exactly the same parameters and can be handled the same (but they don't exist in MKWii). We don't need to know what is transmitted in "msg" since those packets only get forwarded by the server.

bm=2

The server send this list as notification, that an other player has added him. 

     bm = 2
      f = <profile id>
   date = <seconds_since_epoch>
    msg = \r\n\r\n|signed|<hex_string>
  final /

The date parameter is optional and only set for delayed notifications.

In OpenSpy, the hex string is called "signature" and is saved as "syncrequest" in the database. But it is an other value than the "sig" in the authadd.

bm=4

The server send this list to confirm a previous addbuddy message. 

     bm = 4
      f = <profile id>
   date = <seconds_since_epoch>
    msg =
  final /

The date parameter is optional and only set for delayed notifications.

bm=6

This isn't used in MKWii, but maybe in other games. It's used to remove a friend out of the local friend list. 

     bm = 6
      f = <profile id>
   date = <seconds_since_epoch>
  final /

bm=100

The server informs the client about the online status of friends: 

     bm = 100
      f = <profile id>
    msg = <status>
   final /

msg has one of the following formats: 

|s|<status>|ss|<statstring>|ls|<locstring>|ip|<ip_addr>|p|0|qm|0	At status change or at login if buddy is online
|s|<status>|ss|<statstring>						At login if buddy is offline
|s|0|ss|Offline|ls||ip|<ip_addr>|p|0|qm|0				At logout (use last known IP)

status, statstring and locstring are copies of the values, that the client sends using the status list. ip_addr is the decimal representation of a 32 bit IP4 address. p (port) and qm (quietmode) are always 0. If the client is offline, ip contains the last known IP address, ls is empty, ss is "Offline" and s is 0.

challenge

The server-challenge has 10 random uppercase letters generated with the following algo: 

string CClientCM :: GenerateRandomString( string table, unsigned int len )
{
	srand( (unsigned int)time(NULL) );
	int randomInt = rand( );
	int tableLen = table.size( );

	string randomString( " ", len );

    for( unsigned int i = 0; i < len; i++ )
	{
        randomInt = ( randomInt * 0x343FD ) + 0x269EC3;
		randomInt >>= 1;
        randomString[i] = table[ (unsigned int)randomInt % tableLen ];
    }

    return randomString;
}

(table = "ABCDEFGHIJKLMNOPQRSTUVWXYZ", len = 10)

The client-challenge is generated out of random numbers with the following algorithmus. 

char *makechallenge()
{
	int ecx,eax,edx,esi;
	char hash[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

	ecx = rand();

	esi = 0; 
	int test = ecx;
	char *result = new char[33];
	for(int x = 0; x < 32; x++)
	{
		/* CALL */
		ecx = test;
		ecx *= 0x343fd;
		ecx += 0x269ec3;
		eax = ecx;
		eax >>= 0x10;
		eax = eax & 0x7FFF;
		test = ecx;
		/* END CALL */
		ecx = 0x3e;
		edx = eax % ecx;
		esi++;
		result[x] = hash[edx];
	}
	result[32] = 0;
	return result;
}

Now the array result[] contains the client challenge string.

But we can also make our own algo or use a standard one.

delbuddy

The client sends his message, if a friend is removed from the friends list: 

    delbuddy =
     sesskey = <session_key>
delprofileid = <profile id>
       final /

error

The server sends error messages of the following scheme: 

   error  =
     err  = <error_number>
<errtype> = 
  errmsg  = <error_message>
   final /

The error type is only set, if "fatal". Then it is inserted between err and errmsg. Not all error codes are used by all games; this is a complete list of Gamespy errors. These are the known error numbers and related messages:

Error code list

getprofile

Client sends: 

getprofile,sesskey=,profileid=,id=,final

ka

Server sends: 

ka,final

Client sends: 

ka,final

lc=1

Server sends: 

lc=,challenge=,id=,final

lc=2

Server sends: 

lc=,sesskey=,proof=,userid=,profileid=,uniquenick=,lt=,id=,final

login

Client sends: 

login,challenge=,authtoken=,partnerid=,response=,firewall=,port=,productid=,gamename=,namespaceid=,sdkrevision=,quiet=,

logout

Client sends: 

logout,sesskey=,final

lt

Server sends: 

lt=,final

The loginticket is a random string with 22 chars from the following string 

0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ][

and an appended "__".

pi

Server sends: 

pi,profileid=,nick=,userid=,email=,sig=,uniquenick=,pid=,firstname=,lastname=,lon=,lat=,loc,id=,final
pi,profileid=,nick=,userid=,email=,sig=,uniquenick=,pid=,firstname=,lon=,lat=,loc,id=,final
pi,profileid=,nick=,userid=,email=,sig=,uniquenick=,pid=,lon=,lat=,loc,id=,final
pi,profileid=,nick=,userid=,sig=,uniquenick=,pid=,firstname=,lastname=,lon=,lat=,loc,id=,final

status

A status list is send by the client to inform the server about the online status: 

      status = <online_status>
     sesskey = <session_key>
  statstring = /SCM/<max>/SCN/<num>/VER/<vers>
   locstring = <empty_or_string>
Known Status Values
Status Name Description
0 OFFLINE Player is offline.
1 ONLINE Player is online and waiting.
2 PLAYING Player is guest in a race.
3 MATCH_ANYBODY Player is searching for a global room.
4 MATCH_FRIEND Player is connecting to friend room.
5 MATCH_SC_CL MKWii: Player is host of a global / friend room. SSBB & other games: Player is guest in a friend room.
6 MATCH_SC_SV SSBB & other games: Player is host of friend room
Statstring Sub-Parameters
Name Description
VER Matchmaking protocol version (90 for MKWii)
FME Desired number of connections when performing friend specified peer matchmaking.
Not used in Mario Kart Wii.
MDF Should friends of friends be allowed during friend specified peer matchmaking?
Not used in Mario Kart Wii.
SCM the maximum number of connections for server-client matchmaking (max player count, usually 12)
SCN the current number of connections for server-client matchmaking (including the local player)
locstring (8 bytes, BASE64 encoded)
Offset Size Description
0x00 4 dwc_groupid of room owner or host.
0x04 1 last byte of region ID in continental race, 0x7d, 0xef or 0xff elsewhere.
0x05 1 0x00: Inactive
0x02: Waiting
0x03: Host of room
0x04: Guest in room
0x05: Online global/regional VS race
0x08: Online global/regional Battle
0x0b: Online Race Room (host) (Team or GP)
0x0c: Online Battle Room (host)
0x0d: Online Race Room (guest) (Team or GP)
0x0e: Online Battle Room (guest)
0x06 1 player count (0x01 = 1 player, 0x0c = 12 players)
0x07 1 In room races: 0–3 for race 1–4
In room battle: 0–5 for battle 1–6, after 6 battles it stays at 0x05
In continental/global race: Race count of this player, for more than six races it stays at 0x05. Also 0x05 during VIEW.

The locstring status is always updated in the "PREPARE RACE"-phase (just before the countdown of a race starts).

The server distributes the parameters of this list to friends by using the bm=100 parameter list.

updatepro

Client sends: 

updatepro,sesskey=,firstname=,partnerid=,final
updatepro,sesskey=,lastname=,partnerid=,final

Other Servers

Network Protocol Servers
DNS Name IP Address Port Protocol Description
gamestats.gs.nintendowifi.net
mariokartwii.gamestats.gs.nintendowifi.net 		69.10.30.240 29920 — These are looked up, but never used.
gamestats2.gs.nintendowifi.net
mariokartwii.gamestats2.gs.nintendowifi.net 		69.10.30.234 — TCP These are looked up, but never used.
gpcm.gs.nintendowifi.net 69.10.30.242 29900 TCP This connection is used to manage friends and to inform about one's status.
gpsp.gs.nintendowifi.net 69.10.30.241 29901 TCP This server exchanges profile IDs into nicks.
mariokartwii.available.gs.nintendowifi.net
mariokartwii.master.gs.nintendowifi.net 		69.10.30.248 27900 UDP This checks if the server is available.
mariokartwii.ms19.gs.nintendowifi.net 69.10.30.247 28910 TCP This server handles database requests for online matchmaking.
mariokartwii.natneg1.gs.nintendowifi.net 69.10.30.254 27901 UDP NATNEG is a way to bypass NAT and firewalls.
mariokartwii.natneg2.gs.nintendowifi.net 69.10.30.253 27901 UDP NATNEG is a way to bypass NAT and firewalls.
mariokartwii.natneg3.gs.nintendowifi.net 69.10.30.252 27901 UDP NATNEG is a way to bypass NAT and firewalls.
mariokartwii.sake.gs.nintendowifi.net 69.10.24.119 443 TCP/HTTP(S) This server handles Mii exchanges and ghost up- and downloads.
naswii.nintendowifi.net 192.195.204.143
69.25.139.143 		443 TCP/HTTP(S) The authority DNS server delivers randomly both IP addresses with a time to live of 30 seconds to support a kind of load balancing.
mariokartwii.race.gs.nintendowifi.net 69.10.24.125 443 TCP/HTTP(S) This server is used for Time Trial and Competition leaderboards and the actual competition distribution.


Related Topics

Network Protocol

Information:
Nintendo's Servers – Friend Code – Nick – Dumping Network Traffic

Record Types:
HEADER – ROOM – SELECT – USER
RACEHEADER_1 – RACEHEADER_2 – RACEDATA – ITEM – EVENT
NATNEG – ANNOUNCE – QUIT – STATUS – PARAM-STRING

Wiimmfi Extensions:
Online Status – Connection Status – Wiimmfi packets – Server SV

Software:
Wiimms mkw-ana

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