Messages Pregame

Every message in the Pregame area: its opcode, direction, how far it is verified, and its fields.

Note

Generated from the message declarations at bootstrap 48bb36d by Tools/NexusTomorrow.ProtocolReference. Don't edit it by hand: change the declaration's documentation and regenerate.

Server to client

0x0015 Server0015

Opcode	Direction	Verified to
0x0015	server to client	unverified

Field	Bits	Encoding
Unknown0	5	unsigned
Unknown1	32	unsigned

0x0036 CreationLevelLimit

A level that limits the character creation options the client offers.

Opcode	Direction	Verified to
0x0036	server to client	fields

Field	Bits	Encoding	Meaning
Level	32	unsigned	The level. Of the creation options that need no entitlement, the client offers only those whose starting level is at most this, or at most 1 when it is 0.

0x0076 LoginEnvelope

A server message encrypted with the login connection's key.

Opcode	Direction	Verified to
0x0076	server to client	fields

Field	Bits	Encoding	Meaning
Payload	varies	byte block, 32-bit length, the length counts itself	One whole message, which begins with its own 32-bit length (counting those four bytes). The length travels in clear and the bytes after it are encrypted with the login connection's key; the client decrypts them and handles the result as that message.

The client picks the key by opcode, not by the connection the envelope arrives on. Every server message but a ServerHello on the login connection arrives inside this or WorldEnvelope (0x03DC); the client drops any other message that arrives bare.

0x00AD EnterWorld

Moves the player into a world: on character select, the answer to CharacterSelect; in the world, a change of world.

Opcode	Direction	Verified to
0x00AD	server to client	fields

Field	Bits	Encoding	Meaning
WorldId	15	unsigned	The world, as an id in the client's World table.
Position.X	32	float	A point in the world. The client hands it to the world it loads on every update, until it replaces it with a point of its own.
Position.Y	32	float
Position.Z	32	float
Unknown2	32	float	The client gives this value no meaning.
Unknown3	32	float	The client gives this value no meaning.

On character select the client takes it only while a selection is pending, shows the world's loading screen and loads the world.

0x00DC CharacterCreateResult

The answer to CharacterCreate. On success the client selects the new character.

Opcode	Direction	Verified to
0x00DC	server to client	fields

Field	Bits	Encoding	Meaning
CharacterId	64	unsigned	The new character's id, which the client then selects.
Unknown1	32	unsigned	The client gives this value no meaning.
Result	6	unsigned	The result. 3 means the character was created. Any other value is a failure the client hands to its interface, which has a message of its own for 6 (the name is taken), 9 (the account is full), 10 (the name is not allowed), 11 (refused because of the character's faction) and 44 (a character is online), and a general message for the rest.

Taken only while a creation is pending.

0x00E6 CharacterDeleteResult

The answer to CharacterDelete.

Opcode	Direction	Verified to
0x00E6	server to client	fields

Field	Bits	Encoding	Meaning
Result	6	unsigned	The result. 0 means the character was deleted: the client removes it from its list. The interface has a message of its own for 2 (the character leads a guild) and 42 (the character is online), and a general message for the rest.
Count	32	unsigned	A number the interface puts into result 2's message; it reads it for no other result.

Taken only while a deletion is pending.

0x00E7 CharacterDisabled

Marks one listed character disabled or enabled on character select.

Opcode	Direction	Verified to
0x00E7	server to client	fields

Field	Bits	Encoding	Meaning
CharacterId	64	unsigned	The character, as listed in the character list (0x0117).
Disabled	1	unsigned	Whether the character is disabled; the client keeps the flag with the character and shows it.

Taken in any state; a character the list does not hold is ignored.

0x0116 DeletedCharacterList

The account's deleted characters, kept for the character-select interface to look up.

Opcode	Direction	Verified to
0x0116	server to client	fields

Field	Bits	Encoding	Meaning
Characters count	32	unsigned
Characters		array, counted by Characters count	The deleted characters.
Characters[].Unknown0	64	unsigned	The client gives this value no meaning.
Characters[].Unknown1	32	unsigned	The client gives this value no meaning.
Characters[].Name	varies	wide string	The character's name.
Characters[].Level	32	unsigned	The character's level.
Characters[].ClassId	14	unsigned	The character's class id.
Characters[].RaceId	14	unsigned	The character's race id.
Characters[].GenderId	2	unsigned	The character's gender id.
Characters[].FactionId	14	unsigned	The character's faction id.
Characters[].PathId	3	unsigned	The character's path id.
Characters[].WorldId	15	unsigned	The world the character was in.
Characters[].WorldZoneId	15	unsigned	The zone the character was in, as a world zone id.
Characters[].Unknown11	32	float	The client gives this value no meaning. It hands it to its interface as the character's purge date.

Taken while character select is active; the client replaces the list it holds and raises nothing. No interface script looks the list up.

0x0117 CharacterList

The account's characters and its character creation options, the answer to CharacterListRequest. The client replaces its list with this one.

Opcode	Direction	Verified to
0x0117	server to client	fields

Field	Bits	Encoding	Meaning
ServerTime	64	unsigned	The server's clock, as a Windows file time. The client keeps its difference from its own clock.
Characters count	32	unsigned
Characters		array, counted by Characters count	The account's characters.
Characters[].CharacterId	64	unsigned	The character's id, which the client sends back to select, delete or rename it.
Characters[].Name	varies	wide string	The character's name.
Characters[].GenderId	2	unsigned	The character's gender id.
Characters[].RaceId	5	unsigned	The character's race id.
Characters[].ClassId	5	unsigned	The character's class id.
Characters[].FactionId	32	unsigned	The character's faction id.
Characters[].Level	32	unsigned	The character's level.
Characters[].PlainItems count	32	unsigned
Characters[].PlainItems		array, counted by Characters[].PlainItems count	Items that set a slot's look only: the client reads each item's slot and display id here, and neither colour field.
Characters[].PlainItems[].Slot	7	unsigned	The item slot, 0 to 71.
Characters[].PlainItems[].DisplayId	15	unsigned	The look to show in the slot, as a display id.
Characters[].PlainItems[].ColorSetId	14	unsigned	A colour set, as an id in the ItemColorSet table, used when Color is 0.
Characters[].PlainItems[].Color	32	unsigned	The slot's colour, with the top bit set and three 10-bit channels below it; 0 means the colour comes from ColorSetId.
Characters[].ColoredItems count	32	unsigned
Characters[].ColoredItems		array, counted by Characters[].ColoredItems count	Items that set a slot's look and colour, applied after PlainItems and over it for the same slot.
Characters[].ColoredItems[].Slot	7	unsigned	The item slot, 0 to 71.
Characters[].ColoredItems[].DisplayId	15	unsigned	The look to show in the slot, as a display id.
Characters[].ColoredItems[].ColorSetId	14	unsigned	A colour set, as an id in the ItemColorSet table, used when Color is 0.
Characters[].ColoredItems[].Color	32	unsigned	The slot's colour, with the top bit set and three 10-bit channels below it; 0 means the colour comes from ColorSetId.
Characters[].WorldId	15	unsigned	The world the character is in.
Characters[].ZoneId	15	unsigned	A zone id the client uses, with WorldId and Position, to pick the zone whose name it hands to its interface.
Characters[].Unknown11	14	unsigned	The client gives this value no meaning.
Characters[].Position.X	32	float	A point the client uses, x and z only, with WorldId and ZoneId, to pick the zone whose name it hands to its interface.
Characters[].Position.Y	32	float
Characters[].Position.Z	32	float
Characters[].Unknown13	32	float	The client gives this value no meaning.
Characters[].Unknown14	32	float	The client gives this value no meaning.
Characters[].PathId	3	unsigned	The character's path id.
Characters[].Disabled	1	unsigned	Whether the character is disabled; CharacterDisabled updates it.
Characters[].RequiresRename	1	unsigned	Whether the character must be renamed; a successful rename clears it.
Characters[].CostumeMask	32	unsigned	Which costume entries the character shows: bit i set shows entry i of CostumeItems, clear empties its slot. Entries 0 to 5 are item slots 1 to 6 and entry 6 is slot 20.
Characters[].CostumeCount	4	unsigned; counts Characters[].CostumeItems, Characters[].CostumeColors	How many costume entries follow; the client uses at most seven.
Characters[].CostumeItems		array, counted by Characters[].CostumeCount	The costume's items, one per entry, as ids in the Item2 table.
Characters[].CostumeItems[]	32	unsigned
Characters[].CostumeColors		array, counted by Characters[].CostumeCount	A colour per costume entry, laid over its item's own colour.
Characters[].CostumeColors[]	32	unsigned
Characters[].Bones count	32	unsigned
Characters[].Bones		array, counted by Characters[].Bones count	Values the client applies to the character's model.
Characters[].Bones[]	32	float
Characters[].LastLoggedOutDays	32	float	Days relative to when the list arrives, negative in the past; 0 hands nothing over. The client hands it to its interface as the character's last logout, and the interface first selects the character with the largest value.
OfferedCreationIds count	32	unsigned
OfferedCreationIds		array, counted by OfferedCreationIds count	Character creation options to add to those the client considers, as ids in the CharacterCreation table.
OfferedCreationIds[]	32	unsigned
WithheldCreationIds count	32	unsigned
WithheldCreationIds		array, counted by WithheldCreationIds count	Character creation options to withhold, as ids in the CharacterCreation table.
WithheldCreationIds[]	32	unsigned
RealmId	14	unsigned	A realm id; the client takes it as its current realm when a character is selected.
Removal		the fields below	A character the client hands to its interface with RemovalTime, when both parts are not 0 and the character is listed.
Removal.Unknown0	14	unsigned	The client gives this value no meaning. The client uses the pair only when this is not 0.
Removal.CharacterId	64	unsigned	The character, as listed in Characters.
RemovalTime	32	unsigned	Milliseconds left before the character in Removal is removed.
Reservations	32	unsigned	The number of character reservations, which the client hands to its interface.
Unknown8	32	unsigned	The client gives this value no meaning. It hands it to its interface with the list.
Unknown9	32	unsigned	The client gives this value no meaning.
FactionRestriction	14	unsigned	The faction the interface shows the account locked to: 166 Dominion, 167 Exile, 0 none. The client hands it to its interface, which applies it only on a realm that keeps characters to one faction.
FreeLevel50	1	unsigned	Whether the account may create characters at level 50 for free: it gates the interface's count of those and lets character creation skip an entitlement check for one type of creation option.

Taken while character select is active.

0x014B CharacterRenameResult

The answer to CharacterRename.

Opcode	Direction	Verified to
0x014B	server to client	fields

Field	Bits	Encoding	Meaning
Result	6	unsigned	The result. 18 means the character was renamed: the client applies the new name and clears the character's rename-required mark. The interface has a message of its own for 14 (an internal error), 15 (the name is not allowed), 16 (the name is taken), 17 (no rename is available for the character) and 43 (the character is online), and a general message for the rest.
CharacterId	64	unsigned	The character, as listed in the character list (0x0117).
Name	varies	wide string	The character's new name, applied when the result is 18.

Taken only while a rename is pending. The client also reports 15 itself, without sending, for a name that fails its own check.

0x0162 CharacterSelectFailed

Tells the client a CharacterSelect failed; the client returns to idle and passes the reason to its interface.

Opcode	Direction	Verified to
0x0162	server to client	fields

Field	Bits	Encoding	Meaning
Reason	3	unsigned	Why the selection failed. The interface has a message of its own for 1 (the character must be renamed first), 3 (the character is disabled) and 4 (another of the account's characters is still in the world), and a general message for 2 and any other value.

Taken only while a selection is pending.

0x033D SubscriptionState

The account's subscription state.

Opcode	Direction	Verified to
0x033D	server to client	fields

Field	Bits	Encoding	Meaning
TransferFlags	32	unsigned	Bit 0 set makes the interface offer a free realm transfer; the client reads no other bit.
Expired	1	unsigned	Whether the subscription has expired. While it has, the client refuses to create, delete, rename or select characters and to ask for transfer destinations.
GameTimeHours	32	float	The game time left, in hours.

0x036A Kicked

The server ends the player's session.

Opcode	Direction	Verified to
0x036A	server to client	fields

Field	Bits	Encoding	Meaning
Reason	5	unsigned	Why the session ended: 6, 7, 8, 12, 15, 16, 19 and 20 each have a message of their own, any other value a general message.

Taken on character select, realm select and in the world: the client drops its connections and shows the reason's message.

0x03DB RealmHandoff

The login server hands the client to a realm's world server: where to connect, the session key, and the realm's details.

Opcode	Direction	Verified to
0x03DB	server to client	fields

Field	Bits	Encoding	Meaning
WorldAddress	32	unsigned	The world server's IPv4 address as a host-order integer: a.b.c.d is (a << 24) | (b << 16) | (c << 8) | d.
WorldPort	16	unsigned	The world server's TCP port.
SessionKey		the fields below	The session key, in the GUID layout. The client sends it back in WorldHello (0x058F) and derives the world connection's key from it.
SessionKey.Data1	32	signed	The first 32 bits.
SessionKey.Data2	16	signed	The next 16 bits.
SessionKey.Data3	16	signed	The 16 bits after those.
SessionKey.Data4[0]	8	unsigned	The last eight bytes, in order.
SessionKey.Data4[1]	8	unsigned
SessionKey.Data4[2]	8	unsigned
SessionKey.Data4[3]	8	unsigned
SessionKey.Data4[4]	8	unsigned
SessionKey.Data4[5]	8	unsigned
SessionKey.Data4[6]	8	unsigned
SessionKey.Data4[7]	8	unsigned
Echo	32	unsigned	A value the client keeps and sends back unchanged as the first field of WorldHello (0x058F).
RealmName	varies	wide string	The realm's name, shown to the player and used to name the client's settings file for the realm.
RealmFlags	32	unsigned	The realm's flags. Bit 4 set means the realm keeps characters to one faction; the client tests no other bit.
PvpType	2	unsigned	The realm's PvP type: 0 PvE, 1 PvP. The interface treats any other value as PvE.
NoteTextId	21	unsigned	A note about the realm, as an id in the client's text table; 0 means none.

Taken only on the login connection after LoginAccepted. The client opens a connection to the world server, starts it under the build's fixed key, and waits there for ServerHello; the login connection stays open.

0x03DC WorldEnvelope

A server message encrypted with the world connection's key.

Opcode	Direction	Verified to
0x03DC	server to client	fields

Field	Bits	Encoding	Meaning
Payload	varies	byte block, 32-bit length, the length counts itself	One whole message, which begins with its own 32-bit length (counting those four bytes). The length travels in clear and the bytes after it are encrypted with the world connection's key; the client decrypts them and handles the result as that message.

The client picks the key by opcode, not by the connection the envelope arrives on, and drops a server message that arrives bare on the world connection.

0x03E1 RealmAnnouncement

A realm-wide announcement, taken on every screen.

Opcode	Direction	Verified to
0x03E1	server to client	fields

Field	Bits	Encoding	Meaning
Tier	2	unsigned	The announcement's tier. On character and realm select the client passes it to its interface with the text; in the world, 0 and 1 each raise an announcement of their own, and 2 and 3 do not.
Text	varies	wide string	The announcement's text.

0x0591 LoginAccepted

The login server accepts the login.

Opcode	Direction	Verified to
0x0591	server to client	fields

Field	Bits	Encoding	Meaning
DroppedForLag	32	unsigned	Bit 0 set means the player's previous session was dropped for lag, which the login screen can show. The client ignores the other bits.

Taken only on the login connection while the client waits for an answer to LoginRequest. The client then waits for RealmHandoff.

0x0594 WorldLogout

Ends the player's session in the world.

Opcode	Direction	Verified to
0x0594	server to client	fields

Field	Bits	Encoding	Meaning
ToCharacterSelect	1	unsigned	With an ordinary Reason, true returns the player to character select on the same connection and false shows a disconnect message.
Reason	5	unsigned	Why the session ended. 6, 7, 8, 12, 15, 16, 19 and 20 always end in a disconnect message, whatever ToCharacterSelect says; with any other value ToCharacterSelect decides.

Character select and realm select drop it.

0x063D LoginDenied

The login server refuses the login.

Opcode	Direction	Verified to
0x063D	server to client	fields

Field	Bits	Encoding	Meaning
Result	32	unsigned	Why the login was refused. The client has a message of its own for 0 to 13, 16 to 20 and 22 to 27, and a general message for 14, 15 and anything above 27; for 21 it builds its message from Duration.
ResultArgument	32	unsigned	A number the client puts into the message it shows, for every result but 21.
Duration	32	float	Read only when Result is 21: the client multiplies it by 24 and shows the product, to one decimal place, in that result's message.

Taken on the login connection in any state until the client has greeted the world server. The client shows a message chosen by Result, closes its connections and returns to the login screen.

0x06EA PtrCopyQueued

Tells the client a copy of a character to the test realm was queued.

Opcode	Direction	Verified to
0x06EA	server to client	fields

Field	Bits	Encoding	Meaning
(none)	0

On character select the client passes it to its interface.

0x0715 LoginQueueFinished

Tells character select the login queue is done.

Opcode	Direction	Verified to
0x0715	server to client	fields

Field	Bits	Encoding	Meaning
(none)	0

Taken in any state; the client passes it to its interface.

0x0717 LoginQueueStatus

The login queue's status, which the client passes to the character-select interface.

Opcode	Direction	Verified to
0x0717	server to client	fields

Field	Bits	Encoding	Meaning
Position	32	unsigned	The player's place in the queue, shown as a number.
WaitSeconds	32	unsigned	The expected wait, in seconds.
ShowNotice	1	unsigned	Whether the interface shows an extra notice in its queue window.

Taken while character select is active; realm select drops it.

0x0763 RealmNotices

The realm's current notices, each in several languages.

Opcode	Direction	Verified to
0x0763	server to client	fields

Field	Bits	Encoding	Meaning
Notices count	32	unsigned
Notices		array, counted by Notices count	The notices. The client replaces the ones it holds with these.
Notices[].Unknown0	32	unsigned	The client gives this value no meaning.
Notices[].Translations count	8	unsigned
Notices[].Translations		array, counted by Notices[].Translations count	The notice's text per language: the client shows the string at its language id less one (the id its Language table gives the language), and the first string when that one is empty. It does not check that index against the notice's own string count, and the ids are not consecutive, so every notice carries strings through the highest language id less one, with any string at an index no language uses.
Notices[].Translations[]	varies	wide string

Arrives inside an envelope; the client takes it in any state.

0x0765 RealmTransferResult

The outcome of a realm transfer, which the client hands to the character-select screen's interface.

Opcode	Direction	Verified to
0x0765	server to client	fields

Field	Bits	Encoding	Meaning
Result	6	unsigned	The result. 21 means the transfer went through, and the interface treats every other value as an error. It has a message of its own for 20 to 33, 47, 48, 51 and 55.

0x07A1 RealmRedirect

The server's answer to a RealmChoice of another realm: its world server, the session key and the realm's details.

Opcode	Direction	Verified to
0x07A1	server to client	fields

Field	Bits	Encoding	Meaning
Unknown0	32	unsigned	The client gives this value no meaning.
SessionKey		the fields below	The session key, in the GUID layout. The client sends it back in WorldHello on the new connection and derives that connection's key from it.
SessionKey.Data1	32	signed	The first 32 bits.
SessionKey.Data2	16	signed	The next 16 bits.
SessionKey.Data3	16	signed	The 16 bits after those.
SessionKey.Data4[0]	8	unsigned	The last eight bytes, in order.
SessionKey.Data4[1]	8	unsigned
SessionKey.Data4[2]	8	unsigned
SessionKey.Data4[3]	8	unsigned
SessionKey.Data4[4]	8	unsigned
SessionKey.Data4[5]	8	unsigned
SessionKey.Data4[6]	8	unsigned
SessionKey.Data4[7]	8	unsigned
Gateway		the fields below	The realm's world server.
Gateway.Address	32	unsigned	The IPv4 address as a host-order integer: a.b.c.d is (a << 24) | (b << 16) | (c << 8) | d.
Gateway.Port	16	unsigned	The TCP port.
Unknown3	1	unsigned	The client gives this value no meaning.
RealmName	varies	wide string	The realm's name; the client keeps it and names its settings file for the realm with it.
RealmFlags	32	unsigned	The realm's flags. Bit 4 set means the realm keeps characters to one faction; the client tests no other bit.
PvpType	2	unsigned	The realm's PvP type: 0 PvE, 1 PvP. The interface treats any other value as PvE.
NoteTextId	21	unsigned	A note about the realm, as an id in the client's text table; 0 means none.

Taken on the realm-select connection. The client connects to Gateway and waits there for ServerHello.

Client to server

0x0241 PregameKeepAlive

Keeps the connection alive on character and realm select.

Opcode	Direction	Verified to
0x0241	client to server	fields

Field	Bits	Encoding	Meaning
(none)	0

The client sends it at most about once a minute (the interval is a row of its game formula table, 60 seconds by default).

0x0244 ClientEnvelope

A client message encrypted for the connection it is sent on. The client sends every message inside one.

Opcode	Direction	Verified to
0x0244	client to server	fields

Field	Bits	Encoding	Meaning
Payload	varies	byte block, 32-bit length, the length counts itself	One whole message, which begins with its own 32-bit length (counting those four bytes). The length travels in clear and the bytes after it are encrypted with the key of the connection it is sent on.

The message inside is either a TaggedMessage (0x038C), which carries another message under a tag, or a message on its own with no tag. The client sends tagged messages before the world as well as in it. Those it sends on their own include LoginRequest (0x0592), WorldHello (0x058F), CharacterListRequest (0x07E0), CharacterSelect (0x07DD), CharacterDelete (0x0352), PregameKeepAlive (0x0241) and NestedMessage (0x025C).

0x025B CharacterCreate

Creates a character from a character creation option, a name and the player's choices.

Opcode	Direction	Verified to
0x025B	client to server	fields

Field	Bits	Encoding	Meaning
CreationId	32	unsigned	The character creation option, as an id in the CharacterCreation table.
Name	varies	wide string	The new character's name.
Path	3	unsigned	The character's path: 0 Soldier, 1 Settler, 2 Scientist, 3 Explorer.
LookCount	32	unsigned; counts LookIds, LookValues	How many look entries follow.
LookIds		array, counted by LookCount	The look options the player set, by the ids the client keys its look options by.
LookIds[]	32	unsigned
LookValues		array, counted by LookCount	The value chosen for each option in LookIds.
LookValues[]	32	unsigned
Bones count	32	unsigned
Bones		array, counted by Bones count	Values the client's model produces from the player's bone settings.
Bones[]	32	float

Sent inside a NestedMessage, itself inside a ClientEnvelope; the client then waits for CharacterCreateResult.

0x025C NestedMessage

One already-encoded client message, unencrypted, sent only inside a ClientEnvelope.

Opcode	Direction	Verified to
0x025C	client to server	fields

Field	Bits	Encoding	Meaning
Payload	varies	byte block, 32-bit length, the length counts itself	One whole encoded message, which begins with its own 32-bit length (counting those four bytes).

The client uses it only for character creation (0x025B).

0x0352 CharacterDelete

Deletes one listed character.

Opcode	Direction	Verified to
0x0352	client to server	fields

Field	Bits	Encoding	Meaning
CharacterId	64	unsigned	The character, as listed in the character list (0x0117).

The client then waits for the reply (CharacterDeleteResult).

0x03EE TransferDestinationsRequest

Asks for the realms a character could transfer to.

Opcode	Direction	Verified to
0x03EE	client to server	fields

Field	Bits	Encoding	Meaning
Paid	1	unsigned	True when the player asks from the interface's paid transfer, false from its free transfer.

The client sends it only while the account's subscription has not expired (SubscriptionState); the answer is TransferDestinationList.

0x058F WorldHello

The client's greeting on a world connection, its answer to ServerHello there.

Opcode	Direction	Verified to
0x058F	client to server	fields

Field	Bits	Encoding	Meaning
Echo	32	unsigned	The value RealmHandoff (0x03DB) gave the client to send back, unchanged.
SessionKey		the fields below	The session key the client was handed, sent back unchanged, in the GUID layout.
SessionKey.Data1	32	signed	The first 32 bits.
SessionKey.Data2	16	signed	The next 16 bits.
SessionKey.Data3	16	signed	The 16 bits after those.
SessionKey.Data4[0]	8	unsigned	The last eight bytes, in order.
SessionKey.Data4[1]	8	unsigned
SessionKey.Data4[2]	8	unsigned
SessionKey.Data4[3]	8	unsigned
SessionKey.Data4[4]	8	unsigned
SessionKey.Data4[5]	8	unsigned
SessionKey.Data4[6]	8	unsigned
SessionKey.Data4[7]	8	unsigned
Unknown2	64	unsigned	The client gives this value no meaning. It always sends 0.
AccountName	varies	wide string	The account name the login server accepted.
Unknown4	32	unsigned	The client gives this value no meaning. It always sends 3.

The client sends it under the connection's current key, and right after sending it switches the connection to a key derived from SessionKey.

0x0592 LoginRequest

The client's login request on the login connection, its answer to a valid ServerHello: its build, the account and the game token the STS issued, and a description of the client and its machine.

Opcode	Direction	Verified to
0x0592	client to server	fields

Field	Bits	Encoding	Meaning
Build	32	unsigned	The client's build, 16042.
Fingerprint	64	unsigned	A fingerprint of the client's install: a fixed seed folded, byte by byte, over the SHA-1 digests of the running executable and of its patch index file. The same install sends the same value on every login.
AccountName	varies	terminated wide string	The account name the player logged in with, as typed. At most 251 characters.
StsUserId		the fields below	The user id the STS returned when the login finished, parsed from its text form.
StsUserId.Data1	32	signed	The first 32 bits.
StsUserId.Data2	16	signed	The next 16 bits.
StsUserId.Data3	16	signed	The 16 bits after those.
StsUserId.Data4[0]	8	unsigned	The last eight bytes, in order.
StsUserId.Data4[1]	8	unsigned
StsUserId.Data4[2]	8	unsigned
StsUserId.Data4[3]	8	unsigned
StsUserId.Data4[4]	8	unsigned
StsUserId.Data4[5]	8	unsigned
StsUserId.Data4[6]	8	unsigned
StsUserId.Data4[7]	8	unsigned
GameToken		the fields below	The game token the STS issued for this login, parsed from its text form.
GameToken.Data1	32	signed	The first 32 bits.
GameToken.Data2	16	signed	The next 16 bits.
GameToken.Data3	16	signed	The 16 bits after those.
GameToken.Data4[0]	8	unsigned	The last eight bytes, in order.
GameToken.Data4[1]	8	unsigned
GameToken.Data4[2]	8	unsigned
GameToken.Data4[3]	8	unsigned
GameToken.Data4[4]	8	unsigned
GameToken.Data4[5]	8	unsigned
GameToken.Data4[6]	8	unsigned
GameToken.Data4[7]	8	unsigned
ClientAddress	32	unsigned	The client's own IPv4 address on its STS connection, as its socket reports the local end, as a host-order integer: a.b.c.d is (a << 24) | (b << 16) | (c << 8) | d.
LanguageId	32	unsigned	The client's interface language, as an id in the client's Language table.
GameMode	32	unsigned	The client's game mode, set when it starts: 0 by default, and any value of 2 or more becomes 0.
Unknown8	32	unsigned	The client gives this value no meaning. It always sends 0.
Machine		the fields below	A description of the client's machine.
Machine.Processor		the fields below	The processor.
Machine.Processor.Manufacturer	varies	wide string	The processor's manufacturer.
Machine.Processor.Name	varies	wide string	The processor's name.
Machine.Processor.Description	varies	wide string	The processor's description.
Machine.Processor.Family	32	unsigned	The processor's family code.
Machine.Processor.Level	32	unsigned	The processor's level.
Machine.Processor.Revision	32	unsigned	The processor's revision; 0 when Windows gives none.
Machine.Processor.ClockMhz	32	unsigned	The processor's maximum clock speed, in MHz.
Machine.Processor.Cores	32	unsigned	The processor's core count; its logical processor count when Windows reports no cores.
Machine.MemoryMb	32	unsigned	The machine's physical memory, in MiB, rounded up.
Machine.Adapter		the fields below	The default display adapter.
Machine.Adapter.Description	varies	wide string	The adapter's description.
Machine.Adapter.VendorId	32	unsigned	The adapter's vendor id.
Machine.Adapter.DeviceId	32	unsigned	The adapter's device id.
Machine.Adapter.SubsystemId	32	unsigned	The adapter's subsystem id.
Machine.Adapter.Revision	32	unsigned	The adapter's revision.
Machine.Adapter.MemoryMb	32	unsigned	The adapter's memory, in MiB. Windows' own figure stops at 4095.
Machine.Architecture	32	unsigned	The processor architecture: 0x10000 plus a code, 1 for x86, 2 for x64, 3 for IA-64, 4 for ARM and 0 for any other.
Machine.OsVersion	32	unsigned	The Windows version, as (major << 16) | minor.
Machine.OsServicePack	32	unsigned	The Windows service pack, as (major << 16) | minor.
Machine.OsEdition	32	unsigned	The Windows edition: the suite mask in bits 16 to 31, the product type in bits 8 to 15, and in bits 0 to 3 whether Windows is Server R2, Media Center, Starter and Tablet PC.
RealmDataCenterId	32	unsigned	The realm data center the client was started for, as an id in the client's RealmDataCenter table.

The client sends it once per login connection, inside a ClientEnvelope, only once it has an account name, and then waits for LoginAccepted or LoginDenied.

0x06E8 PtrCopyCurrentCharacter

Asks to copy the current character to the test realm, from inside the world.

Opcode	Direction	Verified to
0x06E8	client to server	fields

Field	Bits	Encoding	Meaning
(none)	0

Sent on the world connection, at most once every three seconds from the interface or without that limit from a chat command. The character-select version is 0x06E7, which carries a character id.

0x0786 CharacterRename

Renames one listed character.

Opcode	Direction	Verified to
0x0786	client to server	fields

Field	Bits	Encoding	Meaning
CharacterId	64	unsigned	The character, as listed in the character list (0x0117).
NewName	varies	wide string	The new name. The client sends only names that pass its own check; a server checks it again.

The client then waits for the reply (CharacterRenameResult).

0x07A4 RealmListRequest

Asks for the realm list when the player opens realm select from character select.

Opcode	Direction	Verified to
0x07A4	client to server	fields

Field	Bits	Encoding	Meaning
(none)	0

Sent on the character-select connection, which realm select takes over.

0x07DD CharacterSelect

Enters the world with one listed character.

Opcode	Direction	Verified to
0x07DD	client to server	fields

Field	Bits	Encoding	Meaning
CharacterId	64	unsigned	The character, as listed in the character list (0x0117).

The client takes the realm id from the character list (0x0117) as its current realm, then waits for EnterWorld or the selection's failure (CharacterSelectFailed).

0x07DF RealmChoice

The player's realm choice on the realm-select screen.

Opcode	Direction	Verified to
0x07DF	client to server	fields

Field	Bits	Encoding	Meaning
RealmId	32	unsigned	The chosen realm's id from RealmList, or the current realm's when the player backs out of realm select.

For the realm the client is already on, it carries on in character select without waiting; for another realm it waits for RealmRedirect.

0x07E0 CharacterListRequest

Asks for the character list.

Opcode	Direction	Verified to
0x07E0	client to server	fields

Field	Bits	Encoding	Meaning
(none)	0

The client sends it each time it enters character select: after a world connection's greeting, on choosing the current realm or backing out of realm select, and after leaving the world.

Both ways

0x0003 ServerHello

The server's greeting, the first message on every connection.

Opcode	Direction	Verified to
0x0003	both ways	fields

Field	Bits	Encoding	Meaning
Build	32	unsigned	The client's build. On the login connection the client ends the login unless this is 16042.
RealmId	32	unsigned	The realm the connection serves. The client reads it only on the world connection the login opens, and keeps it as its current realm.
Unknown2	32	unsigned	The client gives this value no meaning.
Unknown3	32	unsigned	The client gives this value no meaning.
Unknown4	64	unsigned	The client gives this value no meaning.
Unknown5	16	unsigned	The client gives this value no meaning.
Unknown6	5	unsigned	The client gives this value no meaning.
ProtocolVersion	32	unsigned	The protocol version. On the login connection the client ends the login unless this is 0x097998A0.
Unknown8	32	unsigned	The client gives this value no meaning.
Unknown9	64	unsigned	The client gives this value no meaning.
Unknown10	32	unsigned	The client gives this value no meaning.

On the login connection the client checks Build and ProtocolVersion and answers with LoginRequest (0x0592). On a world connection it answers with WorldHello (0x058F) and then switches the connection to the key derived from the session key; of its fields it reads only RealmId, and only on the world connection the login opens. The client takes a bare greeting only on the login connection and drops one that arrives bare on any other. The client registers a writer for it as well.

0x003D Message003D

Opcode	Direction	Verified to
0x003D	both ways	unverified

Field	Bits	Encoding
Unknown0	14	unsigned
Unknown1	32	unsigned
Unknown2	varies	wide string
Unknown3	64	unsigned

0x0761 RealmList

The realm-select screen's list of realms, and the realm notices.

Opcode	Direction	Verified to
0x0761	both ways	fields

Field	Bits	Encoding	Meaning
Unknown0	64	unsigned	The client gives this value no meaning.
Realms count	32	unsigned
Realms		array, counted by Realms count	The realms. The client replaces its list with these.
Realms[].RealmId	32	unsigned	The realm's id; RealmChoice names a realm by it.
Realms[].Name	varies	wide string	The realm's name, shown to the player.
Realms[].NoteTextId	32	unsigned	A note about the realm, as an id in the client's text table, shown to the player.
Realms[].Flags	32	unsigned	The realm's flags. Bit 4 set means the realm keeps characters to one faction; bit 0 marks the realm the client picks when it selects one on its own. The client tests no other bit.
Realms[].PvpType	2	unsigned	The realm's PvP type: 0 PvE, 1 PvP. The interface treats any other value as PvE.
Realms[].Status	3	unsigned	The realm's status: 0 unknown, 1 offline, 2 down, 3 on standby, 4 up. The interface shows any other value as unknown.
Realms[].Population	3	unsigned	The realm's population: 0 low, 1 medium, 2 high, 3 full. The interface labels no other value.
Realms[].Unknown7	32	unsigned	The client gives this value no meaning.
Realms[].Unknown8[0]	8	unsigned	The client gives this value no meaning.
Realms[].Unknown8[1]	8	unsigned
Realms[].Unknown8[2]	8	unsigned
Realms[].Unknown8[3]	8	unsigned
Realms[].Unknown8[4]	8	unsigned
Realms[].Unknown8[5]	8	unsigned
Realms[].Unknown8[6]	8	unsigned
Realms[].Unknown8[7]	8	unsigned
Realms[].Unknown8[8]	8	unsigned
Realms[].Unknown8[9]	8	unsigned
Realms[].Unknown8[10]	8	unsigned
Realms[].Unknown8[11]	8	unsigned
Realms[].Unknown8[12]	8	unsigned
Realms[].Unknown8[13]	8	unsigned
Realms[].Unknown8[14]	8	unsigned
Realms[].Unknown8[15]	8	unsigned
Realms[].Summary		the fields below	Values the client shows with the realm.
Realms[].Summary.Unknown0	14	unsigned	The client gives this value no meaning.
Realms[].Summary.Count	32	unsigned	A count the client shows with the realm.
Realms[].Summary.LastPlayed	varies	wide string	A character name the client shows as last played on the realm, when present.
Realms[].Summary.Unknown3	64	unsigned	The client gives this value no meaning.
Realms[].Unknown10	16	unsigned	The client gives this value no meaning.
Realms[].Unknown11	16	unsigned	The client gives this value no meaning.
Realms[].Unknown12	16	unsigned	The client gives this value no meaning.
Realms[].Unknown13	16	unsigned	The client gives this value no meaning.
Notices count	32	unsigned
Notices		array, counted by Notices count	The realm notices. The client replaces the ones it holds with these.
Notices[].Unknown0	32	unsigned	The client gives this value no meaning.
Notices[].Translations count	8	unsigned
Notices[].Translations		array, counted by Notices[].Translations count	The notice's text per language: the client shows the string at its language id less one (the id its Language table gives the language), and the first string when that one is empty. It does not check that index against the notice's own string count, and the ids are not consecutive, so every notice carries strings through the highest language id less one, with any string at an index no language uses.
Notices[].Translations[]	varies	wide string

The client registers a writer for it as well. When a client-side switch is set, the client selects a realm from the list on its own: the first whose Flags has bit 0 set, else the first.

0x0862 TransferDestinationList

The realms a character may transfer to, the answer to TransferDestinationsRequest.

Opcode	Direction	Verified to
0x0862	both ways	fields

Field	Bits	Encoding	Meaning
Destinations count	32	unsigned
Destinations		array, counted by Destinations count	The realms.
Destinations[].RealmId	32	unsigned	The realm's id; RealmChoice names a realm by it.
Destinations[].Name	varies	wide string	The realm's name, shown to the player.
Destinations[].NoteTextId	32	unsigned	A note about the realm, as an id in the client's text table, shown to the player.
Destinations[].Flags	32	unsigned	The realm's flags. Bit 4 set means the realm keeps characters to one faction; bit 0 marks the realm the client picks when it selects one on its own. The client tests no other bit.
Destinations[].PvpType	2	unsigned	The realm's PvP type: 0 PvE, 1 PvP. The interface treats any other value as PvE.
Destinations[].Status	3	unsigned	The realm's status: 0 unknown, 1 offline, 2 down, 3 on standby, 4 up. The interface shows any other value as unknown.
Destinations[].Population	3	unsigned	The realm's population: 0 low, 1 medium, 2 high, 3 full. The interface labels no other value.
Destinations[].Unknown7	32	unsigned	The client gives this value no meaning.
Destinations[].Unknown8[0]	8	unsigned	The client gives this value no meaning.
Destinations[].Unknown8[1]	8	unsigned
Destinations[].Unknown8[2]	8	unsigned
Destinations[].Unknown8[3]	8	unsigned
Destinations[].Unknown8[4]	8	unsigned
Destinations[].Unknown8[5]	8	unsigned
Destinations[].Unknown8[6]	8	unsigned
Destinations[].Unknown8[7]	8	unsigned
Destinations[].Unknown8[8]	8	unsigned
Destinations[].Unknown8[9]	8	unsigned
Destinations[].Unknown8[10]	8	unsigned
Destinations[].Unknown8[11]	8	unsigned
Destinations[].Unknown8[12]	8	unsigned
Destinations[].Unknown8[13]	8	unsigned
Destinations[].Unknown8[14]	8	unsigned
Destinations[].Unknown8[15]	8	unsigned
Destinations[].Summary		the fields below	Values the client shows with the realm.
Destinations[].Summary.Unknown0	14	unsigned	The client gives this value no meaning.
Destinations[].Summary.Count	32	unsigned	A count the client shows with the realm.
Destinations[].Summary.LastPlayed	varies	wide string	A character name the client shows as last played on the realm, when present.
Destinations[].Summary.Unknown3	64	unsigned	The client gives this value no meaning.
Destinations[].Unknown10	16	unsigned	The client gives this value no meaning.
Destinations[].Unknown11	16	unsigned	The client gives this value no meaning.
Destinations[].Unknown12	16	unsigned	The client gives this value no meaning.
Destinations[].Unknown13	16	unsigned	The client gives this value no meaning.
Destinations[].IsFree	1	unsigned	Whether the transfer to this realm is free; the interface leaves such realms out of its paid-transfer list.

The client registers a writer for it as well.

Where the code lives

Piece	Path
Message declarations	Source/NexusTomorrow.Network.Auth/Message/Model/
Message declarations	Source/NexusTomorrow.Network.World/Message/Model/Pregame/
Message declarations	Source/NexusTomorrow.Network/Message/Model/
This page's generator	Tools/NexusTomorrow.ProtocolReference/