steamdatagram_messages_sdr.proto

Protobufs / steamdatagram_messages_sdr.proto

CS2 build 25218825 · Steam date 2026-09-09 · platform windows-x86_64 · schema format 2.2

Group: GC and Steam SDKMessages: 33 top-level, 42 totalEnums: 1 top-level, 10 total

Imports: steamnetworkingsockets_messages_certs.proto, steamnetworkingsockets_messages.proto

Enums

ESteamDatagramMsgID

Steam Datagram Msg ID SteamDatagram DatagramMsg MsgID k_ESteamDatagramMsg_Invalid k_ESteamDatagramMsg_RouterPingRequest k_ESteamDatagramMsg_RouterPingReply k_ESteamDatagramMsg_GameserverPingRequest k_ESteamDatagramMsg_GameserverSessionRequest k_ESteamDatagramMsg_GameserverSessionEstablished k_ESteamDatagramMsg_NoSession k_ESteamDatagramMsg_Diagnostic k_ESteamDatagramMsg_DataClientToRouter k_ESteamDatagramMsg_DataRouterToServer k_ESteamDatagramMsg_DataServerToRouter k_ESteamDatagramMsg_DataRouterToClient k_ESteamDatagramMsg_Stats k_ESteamDatagramMsg_ClientPingSampleRequest k_ESteamDatagramMsg_ClientPingSampleReply k_ESteamDatagramMsg_ClientToRouterSwitchedPrimary k_ESteamDatagramMsg_RelayHealth k_ESteamDatagramMsg_ConnectRequest k_ESteamDatagramMsg_ConnectOK k_ESteamDatagramMsg_ConnectionClosed k_ESteamDatagramMsg_NoConnection k_ESteamDatagramMsg_TicketDecryptRequest k_ESteamDatagramMsg_TicketDecryptReply k_ESteamDatagramMsg_P2PSessionRequest k_ESteamDatagramMsg_P2PSessionEstablished k_ESteamDatagramMsg_P2PStatsClient k_ESteamDatagramMsg_P2PStatsRelay k_ESteamDatagramMsg_P2PBadRoute k_ESteamDatagramMsg_GameserverPingReply k_ESteamDatagramMsg_LegacyGameserverRegistration k_ESteamDatagramMsg_SetSecondaryAddressRequest k_ESteamDatagramMsg_SetSecondaryAddressResult k_ESteamDatagramMsg_RelayToRelayPingRequest k_ESteamDatagramMsg_RelayToRelayPingReply

Name	Number	Message
k_ESteamDatagramMsg_Invalid	0
k_ESteamDatagramMsg_RouterPingRequest	1
k_ESteamDatagramMsg_RouterPingReply	2
k_ESteamDatagramMsg_GameserverPingRequest	3
k_ESteamDatagramMsg_GameserverSessionRequest	5
k_ESteamDatagramMsg_GameserverSessionEstablished	6
k_ESteamDatagramMsg_NoSession	7
k_ESteamDatagramMsg_Diagnostic	8
k_ESteamDatagramMsg_DataClientToRouter	9
k_ESteamDatagramMsg_DataRouterToServer	10
k_ESteamDatagramMsg_DataServerToRouter	11
k_ESteamDatagramMsg_DataRouterToClient	12
k_ESteamDatagramMsg_Stats	13
k_ESteamDatagramMsg_ClientPingSampleRequest	14
k_ESteamDatagramMsg_ClientPingSampleReply	15
k_ESteamDatagramMsg_ClientToRouterSwitchedPrimary	16
k_ESteamDatagramMsg_RelayHealth	17
k_ESteamDatagramMsg_ConnectRequest	18
k_ESteamDatagramMsg_ConnectOK	19
k_ESteamDatagramMsg_ConnectionClosed	20
k_ESteamDatagramMsg_NoConnection	21
k_ESteamDatagramMsg_TicketDecryptRequest	22
k_ESteamDatagramMsg_TicketDecryptReply	23
k_ESteamDatagramMsg_P2PSessionRequest	24
k_ESteamDatagramMsg_P2PSessionEstablished	25
k_ESteamDatagramMsg_P2PStatsClient	26
k_ESteamDatagramMsg_P2PStatsRelay	27
k_ESteamDatagramMsg_P2PBadRoute	28
k_ESteamDatagramMsg_GameserverPingReply	29
k_ESteamDatagramMsg_LegacyGameserverRegistration	30
k_ESteamDatagramMsg_SetSecondaryAddressRequest	31
k_ESteamDatagramMsg_SetSecondaryAddressResult	32
k_ESteamDatagramMsg_RelayToRelayPingRequest	33
k_ESteamDatagramMsg_RelayToRelayPingReply	34

Messages

CMsgSteamNetworkingIPAddress

Msg Steam Networking IP Address MsgSteam SteamNetworking NetworkingIP IPAddress v4 v6

Referenced by (1): CMsgSteamDatagramGameserverPingRequestBody

Field	Number	Label	Type	Default	Description
v4	1	optional	fixed32
v6	2	optional	bytes

CMsgSteamDatagramSignedMessageGeneric

Msg Steam Datagram Signed Message Generic MsgSteam SteamDatagram DatagramSigned SignedMessage MessageGeneric cert signed_data signature dummy_pad

Field	Number	Label	Type	Default	Description
cert	1	optional	CMsgSteamDatagramCertificateSigned
signed_data	2	optional	bytes
signature	3	optional	bytes
dummy_pad	1023	optional	bytes

CMsgSteamDatagramRouterPingReply

Msg Steam Datagram Router Ping Reply MsgSteam SteamDatagram DatagramRouter RouterPing PingReply client_timestamp latency_datacenter_ids latency_ping_ms your_public_ip server_time challenge seconds_until_shutdown client_cookie scoring_penalty_relay_cluster route_exceptions your_public_port flags alt_addresses latency_datacenter_ids_p2p latency_ping_ms_p2p recv_tos echo_sent_tos sent_tos echo_request_reply_tos dummy_pad dummy_varint

Field	Number	Label	Type	Default	Description
client_timestamp	1	optional	fixed32
latency_datacenter_ids	2	repeated	fixed32
latency_ping_ms	3	repeated	uint32
your_public_ip	4	optional	fixed32
server_time	5	optional	fixed32
challenge	6	optional	fixed64
seconds_until_shutdown	7	optional	uint32
client_cookie	8	optional	fixed32
scoring_penalty_relay_cluster	9	optional	uint32
route_exceptions	10	repeated	CMsgSteamDatagramRouterPingReply.RouteException
your_public_port	11	optional	fixed32
flags	12	optional	uint32
alt_addresses	13	repeated	CMsgSteamDatagramRouterPingReply.AltAddress
latency_datacenter_ids_p2p	14	repeated	fixed32
latency_ping_ms_p2p	15	repeated	uint32
recv_tos	16	optional	uint32
echo_sent_tos	17	optional	uint32
sent_tos	18	optional	uint32
echo_request_reply_tos	19	optional	uint32
dummy_pad	99	optional	bytes
dummy_varint	100	optional	uint64

CMsgSteamDatagramRouterPingReply.RouteException

Route Exception data_center_id flags penalty

Referenced by (1): CMsgSteamDatagramRouterPingReply

Field	Number	Label	Type	Default	Description
data_center_id	1	optional	fixed32
flags	2	optional	uint32
penalty	3	optional	uint32

CMsgSteamDatagramRouterPingReply.AltAddress

Alt Address ipv4 port penalty protocol id

Referenced by (1): CMsgSteamDatagramRouterPingReply

Field	Number	Label	Type	Default	Description
ipv4	1	optional	fixed32
port	2	optional	uint32
penalty	3	optional	uint32
protocol	4	optional	CMsgSteamDatagramRouterPingReply.AltAddress.Protocol	DefaultProtocol
id	5	optional	string

CMsgSteamDatagramRouterPingReply.AltAddress.Protocol

DefaultProtocol

Name	Number	Message
DefaultProtocol	0

CMsgSteamDatagramRouterPingReply.Flags

FLAG_MAYBE_MORE_DATA_CENTERS FLAG_MAYBE_MORE_ALT_ADDRESSES

Name	Number	Message
FLAG_MAYBE_MORE_DATA_CENTERS	1
FLAG_MAYBE_MORE_ALT_ADDRESSES	2

CMsgSteamDatagramGameserverPingRequestBody

Msg Steam Datagram Gameserver Ping Request Body MsgSteam SteamDatagram DatagramGameserver GameserverPing PingRequest RequestBody relay_popid your_public_ip your_public_port relay_unix_time routing_secret my_ips echo

Field	Number	Label	Type	Default	Description
relay_popid	1	optional	fixed32
your_public_ip	2	optional	CMsgSteamNetworkingIPAddress
your_public_port	3	optional	uint32
relay_unix_time	4	optional	uint64
routing_secret	5	optional	fixed64
my_ips	6	repeated	CMsgSteamNetworkingIPAddress
echo	8	optional	bytes

CMsgSteamDatagramGameserverPingRequestEnvelope

Msg Steam Datagram Gameserver Ping Request Envelope MsgSteam SteamDatagram DatagramGameserver GameserverPing PingRequest RequestEnvelope legacy_your_public_ip legacy_relay_unix_time legacy_challenge legacy_router_timestamp legacy_your_public_port cert signed_data signature dummy_pad

Field	Number	Label	Type	Default	Description
legacy_your_public_ip	1	optional	fixed32
legacy_relay_unix_time	2	optional	fixed32
legacy_challenge	3	optional	fixed64
legacy_router_timestamp	4	optional	fixed32
legacy_your_public_port	5	optional	fixed32
cert	6	optional	CMsgSteamDatagramCertificateSigned
signed_data	7	optional	bytes
signature	8	optional	bytes
dummy_pad	1023	optional	bytes

CMsgSteamDatagramGameserverPingReplyData

Msg Steam Datagram Gameserver Ping Reply Data MsgSteam SteamDatagram DatagramGameserver GameserverPing PingReply ReplyData echo_relay_unix_time legacy_challenge legacy_router_timestamp data_center_id appid protocol_version echo build network_config_version my_unix_time routing_blob

Field	Number	Label	Type	Default	Description
echo_relay_unix_time	2	optional	fixed32
legacy_challenge	3	optional	fixed64
legacy_router_timestamp	4	optional	fixed32
data_center_id	5	optional	fixed32
appid	6	optional	uint32
protocol_version	7	optional	uint32
echo	8	optional	bytes
build	9	optional	string
network_config_version	10	optional	uint64
my_unix_time	11	optional	fixed32
routing_blob	12	optional	bytes

CMsgSteamDatagramNoSessionRelayToClient

Msg Steam Datagram No Session Relay To Client MsgSteam SteamDatagram DatagramNo NoSession SessionRelay RelayTo ToClient your_public_ip server_time challenge seconds_until_shutdown your_public_port connection_id

Field	Number	Label	Type	Default	Description
your_public_ip	2	optional	fixed32
server_time	3	optional	fixed32
challenge	4	optional	fixed64
seconds_until_shutdown	5	optional	uint32
your_public_port	6	optional	fixed32
connection_id	7	optional	fixed32

CMsgSteamDatagramNoSessionRelayToPeer

Msg Steam Datagram No Session Relay To Peer MsgSteam SteamDatagram DatagramNo NoSession SessionRelay RelayTo ToPeer legacy_relay_session_id from_relay_session_id from_connection_id kludge_pad

Field	Number	Label	Type	Default	Description
legacy_relay_session_id	1	optional	uint32
from_relay_session_id	2	optional	fixed32
from_connection_id	7	optional	fixed32
kludge_pad	99	optional	fixed64

CMsgTOSTreatment

Msg TOS Treatment MsgTOS TOSTreatment l4s_detect up_ecn1 down_dscp45

Referenced by (1): CMsgSteamDatagramClientPingSampleReply

Field	Number	Label	Type	Default	Description
l4s_detect	1	optional	string
up_ecn1	2	optional	string
down_dscp45	3	optional	string

CMsgSteamDatagramClientPingSampleRequest

Msg Steam Datagram Client Ping Sample Request MsgSteam SteamDatagram DatagramClient ClientPing PingSample SampleRequest connection_id

Field	Number	Label	Type	Default	Description
connection_id	1	optional	fixed32

CMsgSteamDatagramClientPingSampleReply

Msg Steam Datagram Client Ping Sample Reply MsgSteam SteamDatagram DatagramClient ClientPing PingSample SampleReply connection_id pops legacy_data_centers relay_override_active tos

Field	Number	Label	Type	Default	Description
connection_id	1	optional	fixed32
pops	2	repeated	CMsgSteamDatagramClientPingSampleReply.POP
legacy_data_centers	3	repeated	CMsgSteamDatagramClientPingSampleReply.LegacyDataCenter
relay_override_active	5	optional	bool
tos	6	optional	CMsgTOSTreatment

CMsgSteamDatagramClientPingSampleReply.POP

pop_id default_front_ping_ms default_e2e_ping_ms cluster_penalty default_e2e_score p2p_via_peer_relay_pop_id alt_addresses best_dc_ping_ms best_dc_score best_dc_via_relay_pop_id default_dc_ping_ms default_dc_score default_dc_via_relay_pop_id test_dc_ping_ms test_dc_score test_dc_via_relay_pop_id

Referenced by (1): CMsgSteamDatagramClientPingSampleReply

Field	Number	Label	Type	Default	Description
pop_id	1	optional	fixed32
default_front_ping_ms	2	optional	uint32
default_e2e_ping_ms	3	optional	uint32
cluster_penalty	4	optional	uint32
default_e2e_score	5	optional	uint32
p2p_via_peer_relay_pop_id	6	optional	fixed32
alt_addresses	7	repeated	CMsgSteamDatagramClientPingSampleReply.POP.AltAddress
best_dc_ping_ms	9	optional	uint32
best_dc_score	10	optional	uint32
best_dc_via_relay_pop_id	11	optional	fixed32
default_dc_ping_ms	12	optional	uint32
default_dc_score	13	optional	uint32
default_dc_via_relay_pop_id	14	optional	fixed32
test_dc_ping_ms	15	optional	uint32
test_dc_score	16	optional	uint32
test_dc_via_relay_pop_id	17	optional	fixed32

CMsgSteamDatagramClientPingSampleReply.POP.AltAddress

Alt Address id front_ping_ms penalty

Referenced by (1): CMsgSteamDatagramClientPingSampleReply.POP

Field	Number	Label	Type	Default	Description
id	1	optional	string
front_ping_ms	2	optional	uint32
penalty	3	optional	uint32

CMsgSteamDatagramClientPingSampleReply.LegacyDataCenter

Legacy Data Center LegacyData DataCenter data_center_id best_dc_via_relay_pop_id best_dc_ping_ms

Referenced by (1): CMsgSteamDatagramClientPingSampleReply

Field	Number	Label	Type	Default	Description
data_center_id	1	optional	fixed32
best_dc_via_relay_pop_id	2	optional	fixed32
best_dc_ping_ms	3	optional	uint32

CMsgSteamDatagramClientSwitchedPrimary

Msg Steam Datagram Client Switched Primary MsgSteam SteamDatagram DatagramClient ClientSwitched SwitchedPrimary connection_id from_ip from_port from_router_cluster from_active_time from_active_packets_recv from_dropped_reason gap_ms from_quality_now to_quality_now from_quality_then to_quality_then

Field	Number	Label	Type	Default	Description
connection_id	1	optional	fixed32
from_ip	2	optional	fixed32
from_port	3	optional	uint32
from_router_cluster	4	optional	fixed32
from_active_time	5	optional	uint32
from_active_packets_recv	6	optional	uint32
from_dropped_reason	7	optional	string
gap_ms	8	optional	uint32
from_quality_now	9	optional	CMsgSteamDatagramClientSwitchedPrimary.RouterQuality
to_quality_now	10	optional	CMsgSteamDatagramClientSwitchedPrimary.RouterQuality
from_quality_then	11	optional	CMsgSteamDatagramClientSwitchedPrimary.RouterQuality
to_quality_then	12	optional	CMsgSteamDatagramClientSwitchedPrimary.RouterQuality

CMsgSteamDatagramClientSwitchedPrimary.RouterQuality

Router Quality score front_ping back_ping seconds_until_down

Referenced by (1): CMsgSteamDatagramClientSwitchedPrimary

Field	Number	Label	Type	Default	Description
score	1	optional	uint32
front_ping	2	optional	uint32
back_ping	3	optional	uint32
seconds_until_down	4	optional	uint32

CMsgSteamDatagramConnectRequest

Msg Steam Datagram Connect Request MsgSteam SteamDatagram DatagramConnect ConnectRequest connection_id gameserver_relay_session_id legacy_client_steam_id my_timestamp ping_est_ms crypt cert virtual_port routing_secret

Field	Number	Label	Type	Default	Description
connection_id	1	optional	fixed32
gameserver_relay_session_id	2	optional	uint32
legacy_client_steam_id	3	optional	fixed64
my_timestamp	4	optional	fixed64
ping_est_ms	5	optional	uint32
crypt	6	optional	CMsgSteamDatagramSessionCryptInfoSigned
cert	7	optional	CMsgSteamDatagramCertificateSigned
virtual_port	9	optional	uint32
routing_secret	10	optional	fixed64

CMsgSteamDatagramConnectOK

Msg Steam Datagram Connect OK MsgSteam SteamDatagram DatagramConnect ConnectOK client_connection_id gameserver_relay_session_id your_timestamp delay_time_usec crypt cert server_connection_id

Field	Number	Label	Type	Default	Description
client_connection_id	1	optional	fixed32
gameserver_relay_session_id	2	optional	uint32
your_timestamp	3	optional	fixed64
delay_time_usec	4	optional	uint32
crypt	5	optional	CMsgSteamDatagramSessionCryptInfoSigned
cert	6	optional	CMsgSteamDatagramCertificateSigned
server_connection_id	7	optional	fixed32

CMsgSteamNetworkingP2PSDRRoutingSummary

Msg Steam Networking P2 PSDR Routing Summary MsgSteam SteamNetworking NetworkingP2 P2PSDR PSDRRouting RoutingSummary initial_ping initial_ping_front_local initial_ping_front_remote initial_score initial_pop_local initial_pop_remote negotiation_ms selected_seconds best_ping best_ping_front_local best_ping_front_remote best_score best_pop_local best_pop_remote best_time

Referenced by (1): CMsgSteamDatagramP2PRoutingSummary

Field	Number	Label	Type	Default	Description
initial_ping	1	optional	uint32
initial_ping_front_local	2	optional	uint32
initial_ping_front_remote	3	optional	uint32
initial_score	4	optional	uint32
initial_pop_local	5	optional	fixed32
initial_pop_remote	6	optional	fixed32
negotiation_ms	7	optional	uint32
selected_seconds	8	optional	uint32
best_ping	11	optional	uint32
best_ping_front_local	12	optional	uint32
best_ping_front_remote	13	optional	uint32
best_score	14	optional	uint32
best_pop_local	15	optional	fixed32
best_pop_remote	16	optional	fixed32
best_time	17	optional	uint32

CMsgSteamDatagramP2PRoutingSummary

Msg Steam Datagram P2 Routing Summary MsgSteam SteamDatagram DatagramP2 P2Routing RoutingSummary ice sdr

Referenced by (4): CGameNetworkingUI_ConnectionState, CMsgSteamDatagramConnectionClosed, CMsgSteamDatagramConnectionStatsP2PClientToRouter, CMsgSteamDatagramNoConnection

Field	Number	Label	Type	Default	Description
ice	2	optional	CMsgSteamNetworkingICESessionSummary
sdr	3	optional	CMsgSteamNetworkingP2PSDRRoutingSummary

CMsgSteamDatagramConnectionClosed

Msg Steam Datagram Connection Closed MsgSteam SteamDatagram DatagramConnection ConnectionClosed legacy_gameserver_relay_session_id legacy_from_steam_id relay_mode debug reason_code to_connection_id from_connection_id to_relay_session_id from_relay_session_id forward_target_relay_routing_token forward_target_revision legacy_from_identity_binary routing_secret from_identity_string not_primary_session quality_relay quality_e2e not_primary_transport p2p_routing_summary relay_override_active

Field	Number	Label	Type	Default	Description
legacy_gameserver_relay_session_id	2	optional	uint32
legacy_from_steam_id	3	optional	fixed64
relay_mode	4	optional	CMsgSteamDatagramConnectionClosed.ERelayMode
debug	5	optional	string
reason_code	6	optional	uint32
to_connection_id	7	optional	fixed32
from_connection_id	8	optional	fixed32
to_relay_session_id	9	optional	fixed32
from_relay_session_id	10	optional	fixed32
forward_target_relay_routing_token	11	optional	bytes
forward_target_revision	12	optional	uint32
legacy_from_identity_binary	13	optional	CMsgSteamNetworkingIdentityLegacyBinary
routing_secret	14	optional	fixed64
from_identity_string	15	optional	string
not_primary_session	16	optional	bool
quality_relay	17	optional	CMsgSteamDatagramConnectionQuality
quality_e2e	18	optional	CMsgSteamDatagramConnectionQuality
not_primary_transport	19	optional	bool
p2p_routing_summary	21	optional	CMsgSteamDatagramP2PRoutingSummary
relay_override_active	22	optional	bool

CMsgSteamDatagramConnectionClosed.ERelayMode

Relay Mode RelayMode None EndToEnd ClosedByPeer

Name	Number	Message
None	0
EndToEnd	1
ClosedByPeer	2

CMsgSteamDatagramNoConnection

Msg Steam Datagram No Connection MsgSteam SteamDatagram DatagramNo NoConnection legacy_gameserver_relay_session_id legacy_from_steam_id end_to_end to_connection_id from_connection_id from_identity_string to_relay_session_id from_relay_session_id routing_secret not_primary_session quality_relay quality_e2e not_primary_transport p2p_routing_summary relay_override_active dummy_pad

Field	Number	Label	Type	Default	Description
legacy_gameserver_relay_session_id	2	optional	uint32
legacy_from_steam_id	3	optional	fixed64
end_to_end	4	optional	bool
to_connection_id	5	optional	fixed32
from_connection_id	6	optional	fixed32
from_identity_string	7	optional	string
to_relay_session_id	9	optional	fixed32
from_relay_session_id	10	optional	fixed32
routing_secret	11	optional	fixed64
not_primary_session	12	optional	bool
quality_relay	13	optional	CMsgSteamDatagramConnectionQuality
quality_e2e	14	optional	CMsgSteamDatagramConnectionQuality
not_primary_transport	15	optional	bool
p2p_routing_summary	16	optional	CMsgSteamDatagramP2PRoutingSummary
relay_override_active	17	optional	bool
dummy_pad	1023	optional	fixed32

CMsgSteamDatagramGameserverSessionRequest

Msg Steam Datagram Gameserver Session Request MsgSteam SteamDatagram DatagramGameserver GameserverSession SessionRequest ticket challenge_time challenge client_connection_id network_config_version protocol_version server_connection_id platform build dev_gameserver_identity dev_client_cert

Field	Number	Label	Type	Default	Description
ticket	1	optional	bytes
challenge_time	3	optional	fixed32
challenge	4	optional	fixed64
client_connection_id	5	optional	fixed32
network_config_version	6	optional	uint64
protocol_version	7	optional	uint32
server_connection_id	8	optional	fixed32
platform	9	optional	string
build	10	optional	string
dev_gameserver_identity	100	optional	string
dev_client_cert	101	optional	CMsgSteamDatagramCertificateSigned

CMsgSteamDatagramGameserverSessionEstablished

Msg Steam Datagram Gameserver Session Established MsgSteam SteamDatagram DatagramGameserver GameserverSession SessionEstablished connection_id gameserver_identity_string legacy_gameserver_steamid seconds_until_shutdown seq_num_r2c dummy_legacy_identity_binary

Field	Number	Label	Type	Default	Description
connection_id	1	optional	fixed32
gameserver_identity_string	2	optional	string
legacy_gameserver_steamid	3	optional	fixed64
seconds_until_shutdown	4	optional	uint32
seq_num_r2c	6	optional	uint32
dummy_legacy_identity_binary	7	optional	bytes

CMsgSteamDatagramConnectionStatsClientToRouter

Msg Steam Datagram Connection Stats Client To Router MsgSteam SteamDatagram DatagramConnection ConnectionStats StatsClient ClientTo ToRouter quality_relay quality_e2e ack_relay legacy_ack_e2e flags client_connection_id seq_num_c2r seq_num_e2e

Field	Number	Label	Type	Default	Description
quality_relay	1	optional	CMsgSteamDatagramConnectionQuality
quality_e2e	2	optional	CMsgSteamDatagramConnectionQuality
ack_relay	4	repeated	fixed32
legacy_ack_e2e	5	repeated	fixed32
flags	6	optional	uint32
client_connection_id	8	optional	fixed32
seq_num_c2r	9	optional	uint32
seq_num_e2e	10	optional	uint32

CMsgSteamDatagramConnectionStatsClientToRouter.Flags

ACK_REQUEST_RELAY ACK_REQUEST_E2E ACK_REQUEST_IMMEDIATE NOT_PRIMARY_SESSION CLIENT_RELAY_OVERRIDE

Name	Number	Message
ACK_REQUEST_RELAY	1
ACK_REQUEST_E2E	2
ACK_REQUEST_IMMEDIATE	4
NOT_PRIMARY_SESSION	8
CLIENT_RELAY_OVERRIDE	32

CMsgSteamDatagramConnectionStatsRouterToClient

Msg Steam Datagram Connection Stats Router To Client MsgSteam SteamDatagram DatagramConnection ConnectionStats StatsRouter RouterTo ToClient quality_relay quality_e2e seconds_until_shutdown client_connection_id seq_num_r2c seq_num_e2e migrate_request_ip migrate_request_port scoring_penalty_relay_cluster ack_relay legacy_ack_e2e flags

Field	Number	Label	Type	Default	Description
quality_relay	1	optional	CMsgSteamDatagramConnectionQuality
quality_e2e	2	optional	CMsgSteamDatagramConnectionQuality
seconds_until_shutdown	6	optional	uint32
client_connection_id	7	optional	fixed32
seq_num_r2c	8	optional	uint32
seq_num_e2e	9	optional	uint32
migrate_request_ip	10	optional	fixed32
migrate_request_port	11	optional	uint32
scoring_penalty_relay_cluster	12	optional	uint32
ack_relay	13	repeated	fixed32
legacy_ack_e2e	14	repeated	fixed32
flags	15	optional	uint32

CMsgSteamDatagramConnectionStatsRouterToClient.Flags

ACK_REQUEST_RELAY ACK_REQUEST_E2E ACK_REQUEST_IMMEDIATE

Name	Number	Message
ACK_REQUEST_RELAY	1
ACK_REQUEST_E2E	2
ACK_REQUEST_IMMEDIATE	4

CMsgSteamDatagramConnectionStatsRouterToServer

Msg Steam Datagram Connection Stats Router To Server MsgSteam SteamDatagram DatagramConnection ConnectionStats StatsRouter RouterTo ToServer quality_relay quality_e2e seq_num_r2s seq_num_e2e legacy_client_steam_id relay_session_id client_connection_id ack_relay legacy_ack_e2e flags server_connection_id routing_secret client_identity_string

Field	Number	Label	Type	Default	Description
quality_relay	1	optional	CMsgSteamDatagramConnectionQuality
quality_e2e	2	optional	CMsgSteamDatagramConnectionQuality
seq_num_r2s	5	optional	uint32
seq_num_e2e	6	optional	uint32
legacy_client_steam_id	7	optional	fixed64
relay_session_id	8	optional	uint32
client_connection_id	9	optional	fixed32
ack_relay	10	repeated	fixed32
legacy_ack_e2e	11	repeated	fixed32
flags	12	optional	uint32
server_connection_id	13	optional	fixed32
routing_secret	14	optional	fixed64
client_identity_string	15	optional	string

CMsgSteamDatagramConnectionStatsRouterToServer.Flags

ACK_REQUEST_RELAY ACK_REQUEST_E2E ACK_REQUEST_IMMEDIATE

Name	Number	Message
ACK_REQUEST_RELAY	1
ACK_REQUEST_E2E	2
ACK_REQUEST_IMMEDIATE	4

CMsgSteamDatagramConnectionStatsServerToRouter

Msg Steam Datagram Connection Stats Server To Router MsgSteam SteamDatagram DatagramConnection ConnectionStats StatsServer ServerTo ToRouter quality_relay quality_e2e seq_num_s2r seq_num_e2e relay_session_id client_connection_id ack_relay legacy_ack_e2e flags server_connection_id

Field	Number	Label	Type	Default	Description
quality_relay	1	optional	CMsgSteamDatagramConnectionQuality
quality_e2e	2	optional	CMsgSteamDatagramConnectionQuality
seq_num_s2r	3	optional	uint32
seq_num_e2e	4	optional	uint32
relay_session_id	6	optional	uint32
client_connection_id	7	optional	fixed32
ack_relay	8	repeated	fixed32
legacy_ack_e2e	9	repeated	fixed32
flags	10	optional	uint32
server_connection_id	11	optional	fixed32

CMsgSteamDatagramConnectionStatsServerToRouter.Flags

ACK_REQUEST_RELAY ACK_REQUEST_E2E ACK_REQUEST_IMMEDIATE

Name	Number	Message
ACK_REQUEST_RELAY	1
ACK_REQUEST_E2E	2
ACK_REQUEST_IMMEDIATE	4

CMsgSteamDatagramP2PSessionRequestBody

Msg Steam Datagram P2 Session Request Body MsgSteam SteamDatagram DatagramP2 P2Session SessionRequest RequestBody challenge_time challenge client_connection_id legacy_peer_steam_id peer_connection_id protocol_version network_config_version peer_identity_string platform build encrypted_data encryption_your_public_key_lead_byte encryption_my_ephemeral_public_key

Field	Number	Label	Type	Default	Description
challenge_time	1	optional	fixed32
challenge	2	optional	fixed64
client_connection_id	3	optional	fixed32
legacy_peer_steam_id	4	optional	fixed64
peer_connection_id	5	optional	fixed32
protocol_version	8	optional	uint32
network_config_version	9	optional	uint64
peer_identity_string	11	optional	string
platform	12	optional	string
build	13	optional	string
encrypted_data	14	optional	bytes
encryption_your_public_key_lead_byte	15	optional	uint32
encryption_my_ephemeral_public_key	16	optional	bytes

CMsgSteamDatagramP2PSessionRequestBody.EncryptedData

Encrypted Data peer_identity_string

Field	Number	Label	Type	Default	Description
peer_identity_string	1	optional	string

CMsgSteamDatagramP2PSessionRequest

Msg Steam Datagram P2 Session Request MsgSteam SteamDatagram DatagramP2 P2Session SessionRequest cert body signature

Field	Number	Label	Type	Default	Description
cert	1	optional	CMsgSteamDatagramCertificateSigned
body	2	optional	bytes
signature	3	optional	bytes

CMsgSteamDatagramP2PSessionEstablished

Msg Steam Datagram P2 Session Established MsgSteam SteamDatagram DatagramP2 P2Session SessionEstablished connection_id seconds_until_shutdown relay_routing_token seq_num_r2c

Field	Number	Label	Type	Default	Description
connection_id	1	optional	fixed32
seconds_until_shutdown	3	optional	uint32
relay_routing_token	4	optional	bytes
seq_num_r2c	5	optional	uint32

CMsgSteamDatagramConnectionStatsP2PClientToRouter

Msg Steam Datagram Connection Stats P2 Client To Router MsgSteam SteamDatagram DatagramConnection ConnectionStats StatsP2 P2Client ClientTo ToRouter quality_relay quality_e2e ack_relay legacy_ack_e2e flags forward_target_relay_routing_token forward_target_revision routes ack_peer_routes_revision connection_id seq_num_c2r seq_num_e2e p2p_routing_summary

Field	Number	Label	Type	Default	Description
quality_relay	1	optional	CMsgSteamDatagramConnectionQuality
quality_e2e	2	optional	CMsgSteamDatagramConnectionQuality
ack_relay	3	repeated	fixed32
legacy_ack_e2e	4	repeated	fixed32
flags	5	optional	uint32
forward_target_relay_routing_token	6	optional	bytes
forward_target_revision	7	optional	uint32
routes	8	optional	bytes
ack_peer_routes_revision	9	optional	uint32
connection_id	10	optional	fixed32
seq_num_c2r	11	optional	uint32
seq_num_e2e	12	optional	uint32
p2p_routing_summary	14	optional	CMsgSteamDatagramP2PRoutingSummary

CMsgSteamDatagramConnectionStatsP2PClientToRouter.Flags

ACK_REQUEST_RELAY ACK_REQUEST_E2E ACK_REQUEST_IMMEDIATE NOT_PRIMARY_SESSION NOT_PRIMARY_TRANSPORT_E2E CLIENT_RELAY_OVERRIDE

Name	Number	Message
ACK_REQUEST_RELAY	1
ACK_REQUEST_E2E	2
ACK_REQUEST_IMMEDIATE	4
NOT_PRIMARY_SESSION	8
NOT_PRIMARY_TRANSPORT_E2E	16
CLIENT_RELAY_OVERRIDE	32

CMsgSteamDatagramConnectionStatsP2PRouterToClient

Msg Steam Datagram Connection Stats P2 Router To Client MsgSteam SteamDatagram DatagramConnection ConnectionStats StatsP2 P2Router RouterTo ToClient quality_relay quality_e2e seconds_until_shutdown migrate_request_ip migrate_request_port scoring_penalty_relay_cluster ack_relay legacy_ack_e2e flags ack_forward_target_revision routes ack_peer_routes_revision connection_id seq_num_r2c seq_num_e2e

Field	Number	Label	Type	Default	Description
quality_relay	1	optional	CMsgSteamDatagramConnectionQuality
quality_e2e	2	optional	CMsgSteamDatagramConnectionQuality
seconds_until_shutdown	3	optional	uint32
migrate_request_ip	4	optional	fixed32
migrate_request_port	5	optional	uint32
scoring_penalty_relay_cluster	6	optional	uint32
ack_relay	7	repeated	fixed32
legacy_ack_e2e	8	repeated	fixed32
flags	9	optional	uint32
ack_forward_target_revision	10	optional	uint32
routes	11	optional	bytes
ack_peer_routes_revision	12	optional	uint32
connection_id	13	optional	fixed32
seq_num_r2c	14	optional	uint32
seq_num_e2e	15	optional	uint32

CMsgSteamDatagramConnectionStatsP2PRouterToClient.Flags

ACK_REQUEST_RELAY ACK_REQUEST_E2E ACK_REQUEST_IMMEDIATE NOT_PRIMARY_TRANSPORT_E2E

Name	Number	Message
ACK_REQUEST_RELAY	1
ACK_REQUEST_E2E	2
ACK_REQUEST_IMMEDIATE	4
NOT_PRIMARY_TRANSPORT_E2E	16

CMsgSteamDatagramP2PBadRouteRouterToClient

Msg Steam Datagram P2 Bad Route Router To Client MsgSteam SteamDatagram DatagramP2 P2Bad BadRoute RouteRouter RouterTo ToClient connection_id failed_relay_routing_token ack_forward_target_revision kludge_pad

Field	Number	Label	Type	Default	Description
connection_id	1	optional	fixed32
failed_relay_routing_token	2	optional	bytes
ack_forward_target_revision	3	optional	uint32
kludge_pad	99	optional	fixed64

CMsgSteamDatagramP2PRoutes

Msg Steam Datagram P2 Routes MsgSteam SteamDatagram DatagramP2 P2Routes relay_clusters routes revision

Field	Number	Label	Type	Default	Description
relay_clusters	1	repeated	CMsgSteamDatagramP2PRoutes.RelayCluster
routes	2	repeated	CMsgSteamDatagramP2PRoutes.Route
revision	3	optional	uint32

CMsgSteamDatagramP2PRoutes.RelayCluster

Relay Cluster pop_id ping_ms score_penalty session_relay_routing_token

Referenced by (1): CMsgSteamDatagramP2PRoutes

Field	Number	Label	Type	Default	Description
pop_id	1	optional	fixed32
ping_ms	2	optional	uint32
score_penalty	3	optional	uint32
session_relay_routing_token	4	optional	bytes

CMsgSteamDatagramP2PRoutes.Route

my_pop_id your_pop_id legacy_score interior_score

Referenced by (1): CMsgSteamDatagramP2PRoutes

Field	Number	Label	Type	Default	Description
my_pop_id	1	optional	fixed32
your_pop_id	2	optional	fixed32
legacy_score	3	optional	uint32
interior_score	4	optional	uint32

CMsgSteamDatagramSetSecondaryAddressRequest

Msg Steam Datagram Set Secondary Address Request MsgSteam SteamDatagram DatagramSet SetSecondary SecondaryAddress AddressRequest client_main_ip client_main_port client_connection_id client_identity request_send_duplication kludge_pad

Field	Number	Label	Type	Default	Description
client_main_ip	1	optional	fixed32
client_main_port	2	optional	fixed32
client_connection_id	3	optional	fixed32
client_identity	4	optional	string
request_send_duplication	5	optional	bool
kludge_pad	99	optional	bytes

CMsgSteamDatagramSetSecondaryAddressResult

Msg Steam Datagram Set Secondary Address Result MsgSteam SteamDatagram DatagramSet SetSecondary SecondaryAddress AddressResult success message

Field	Number	Label	Type	Default	Description
success	1	optional	bool
message	2	optional	string

Reference graph

Message reference graph (32 edges)

flowchart LR
    n0["CMsgSteamDatagramSignedMessageGeneric"]
    n1["CMsgSteamDatagramCertificateSigned"]
    n0 --> n1
    n2["CMsgSteamDatagramRouterPingReply"]
    n3["CMsgSteamDatagramRouterPingReply.RouteException"]
    n2 --> n3
    n4["CMsgSteamDatagramRouterPingReply.AltAddress"]
    n2 --> n4
    n5["CMsgSteamDatagramGameserverPingRequestBody"]
    n6["CMsgSteamNetworkingIPAddress"]
    n5 --> n6
    n7["CMsgSteamDatagramGameserverPingRequestEnvelope"]
    n7 --> n1
    n8["CMsgSteamDatagramClientPingSampleReply"]
    n9["CMsgSteamDatagramClientPingSampleReply.POP"]
    n8 --> n9
    n10["CMsgSteamDatagramClientPingSampleReply.LegacyDataCenter"]
    n8 --> n10
    n11["CMsgTOSTreatment"]
    n8 --> n11
    n12["CMsgSteamDatagramClientPingSampleReply.POP.AltAddress"]
    n9 --> n12
    n13["CMsgSteamDatagramClientSwitchedPrimary"]
    n14["CMsgSteamDatagramClientSwitchedPrimary.RouterQuality"]
    n13 --> n14
    n15["CMsgSteamDatagramConnectRequest"]
    n16["CMsgSteamDatagramSessionCryptInfoSigned"]
    n15 --> n16
    n15 --> n1
    n17["CMsgSteamDatagramConnectOK"]
    n17 --> n16
    n17 --> n1
    n18["CMsgSteamDatagramP2PRoutingSummary"]
    n19["CMsgSteamNetworkingICESessionSummary"]
    n18 --> n19
    n20["CMsgSteamNetworkingP2PSDRRoutingSummary"]
    n18 --> n20
    n21["CMsgSteamDatagramConnectionClosed"]
    n22["CMsgSteamNetworkingIdentityLegacyBinary"]
    n21 --> n22
    n23["CMsgSteamDatagramConnectionQuality"]
    n21 --> n23
    n21 --> n18
    n24["CMsgSteamDatagramNoConnection"]
    n24 --> n23
    n24 --> n18
    n25["CMsgSteamDatagramGameserverSessionRequest"]
    n25 --> n1
    n26["CMsgSteamDatagramConnectionStatsClientToRouter"]
    n26 --> n23
    n27["CMsgSteamDatagramConnectionStatsRouterToClient"]
    n27 --> n23
    n28["CMsgSteamDatagramConnectionStatsRouterToServer"]
    n28 --> n23
    n29["CMsgSteamDatagramConnectionStatsServerToRouter"]
    n29 --> n23
    n30["CMsgSteamDatagramP2PSessionRequest"]
    n30 --> n1
    n31["CMsgSteamDatagramConnectionStatsP2PClientToRouter"]
    n31 --> n23
    n31 --> n18
    n32["CMsgSteamDatagramConnectionStatsP2PRouterToClient"]
    n32 --> n23
    n33["CMsgSteamDatagramP2PRoutes"]
    n34["CMsgSteamDatagramP2PRoutes.RelayCluster"]
    n33 --> n34
    n35["CMsgSteamDatagramP2PRoutes.Route"]
    n33 --> n35