cloudflared-mirror/tunnelrpc/tunnelrpc.capnp

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using Go = import "go.capnp";
@0xdb8274f9144abc7e;
$Go.package("tunnelrpc");
$Go.import("github.com/cloudflare/cloudflared/tunnelrpc");
struct Authentication {
key @0 :Text;
email @1 :Text;
originCAKey @2 :Text;
}
struct TunnelRegistration {
err @0 :Text;
# the url to access the tunnel
url @1 :Text;
# Used to inform the client of actions taken.
logLines @2 :List(Text);
# In case of error, whether the client should attempt to reconnect.
permanentFailure @3 :Bool;
# Displayed to user
tunnelID @4 :Text;
}
struct RegistrationOptions {
# The tunnel client's unique identifier, used to verify a reconnection.
clientId @0 :Text;
# Information about the running binary.
version @1 :Text;
os @2 :Text;
# What to do with existing tunnels for the given hostname.
existingTunnelPolicy @3 :ExistingTunnelPolicy;
# If using the balancing policy, identifies the LB pool to use.
poolName @4 :Text;
# Client-defined tags to associate with the tunnel
tags @5 :List(Tag);
# A unique identifier for a high-availability connection made by a single client.
connectionId @6 :UInt8;
# origin LAN IP
originLocalIp @7 :Text;
# whether Argo Tunnel client has been autoupdated
isAutoupdated @8 :Bool;
# whether Argo Tunnel client is run from a terminal
runFromTerminal @9 :Bool;
# cross stream compression setting, 0 - off, 3 - high
compressionQuality @10 :UInt64;
uuid @11 :Text;
}
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struct CapnpConnectParameters {
# certificate and token to prove ownership of a zone
originCert @0 :Data;
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# UUID assigned to this cloudflared obtained from Hello
cloudflaredID @1 :Data;
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# number of previous attempts to send Connect
numPreviousAttempts @2 :UInt8;
# user defined labels for this cloudflared
tags @3 :List(Tag);
# release version of cloudflared
cloudflaredVersion @4 :Text;
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}
struct ConnectResult {
err @0 :ConnectError;
# Information about the server this connection is established with
serverInfo @1 :ServerInfo;
}
struct ConnectError {
cause @0 :Text;
# How long should this connection wait to retry in ns
retryAfter @1 :Int64;
shouldRetry @2 :Bool;
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}
struct ClientConfig {
# Version of this configuration. This value is opaque, but is guaranteed
# to monotonically increase in value. Any configuration supplied to
# useConfiguration() with a smaller `version` should be ignored.
version @0 :UInt64;
# Frequency (in ns) to check Equinox for updates.
# Zero means auto-update is disabled.
# cloudflared CLI option: `autoupdate-freq`
autoUpdateFrequency @1 :Int64;
# Frequency (in ns) to update connection-based metrics.
# cloudflared CLI option: `metrics-update-freq`
metricsUpdateFrequency @2 :Int64;
# interval (in ns) between heartbeats with the Cloudflare edge
# cloudflared CLI option: `heartbeat-interval`
heartbeatInterval @3 :Int64;
# Minimum number of unacked heartbeats for cloudflared to send before
# closing the connection to the edge.
# cloudflared CLI option: `heartbeat-count`
maxFailedHeartbeats @4 :UInt64;
# Time (in ns) to continue serving requests after cloudflared receives its
# first SIGINT/SIGTERM. A second SIGINT/SIGTERM will force cloudflared to
# shutdown immediately. For example, this field can be used to gracefully
# transition traffic to another cloudflared instance.
# cloudflared CLI option: `grace-period`
gracePeriod @5 :Int64;
# Configuration for cloudflared to run as a DNS-over-HTTPS proxy.
# cloudflared CLI option: `proxy-dns`
dohProxyConfigs @6 :List(DoHProxyConfig);
# Configuration for cloudflared to run as an HTTP reverse proxy.
reverseProxyConfigs @7 :List(ReverseProxyConfig);
# Number of persistent connections to keep open between cloudflared and
# the edge.
# cloudflared CLI option: `ha-connections`
numHAConnections @8 :UInt8;
}
struct ReverseProxyConfig {
tunnelHostname @0 :Text;
origin :union {
http @1 :HTTPOriginConfig;
websocket @2 :WebSocketOriginConfig;
helloWorld @3 :HelloWorldOriginConfig;
}
# Maximum number of retries for connection/protocol errors.
# cloudflared CLI option: `retries`
retries @4 :UInt64;
# maximum time (in ns) for cloudflared to wait to establish a connection
# to the origin. Zero means no timeout.
# cloudflared CLI option: `proxy-connect-timeout`
connectionTimeout @5 :Int64;
# (beta) Use cross-stream compression instead of HTTP compression.
# 0=off, 1=low, 2=medium, 3=high.
# For more context see the mapping here: https://github.com/cloudflare/cloudflared/blob/2019.3.2/h2mux/h2_dictionaries.go#L62
# cloudflared CLI option: `compression-quality`
compressionQuality @6 :UInt64;
}
struct WebSocketOriginConfig {
# URI of the origin service.
# cloudflared will start a websocket server that forwards data to this URI
# cloudflared CLI option: `url`
# cloudflared logic: https://github.com/cloudflare/cloudflared/blob/2019.3.2/cmd/cloudflared/tunnel/cmd.go#L304
url @0 :Text;
# Whether cloudflared should verify TLS connections to the origin.
# negation of cloudflared CLI option: `no-tls-verify`
tlsVerify @1 :Bool;
# originCAPool specifies the root CA that cloudflared should use when
# verifying TLS connections to the origin.
# - if tlsVerify is false, originCAPool will be ignored.
# - if tlsVerify is true and originCAPool is empty, the system CA pool
# will be loaded if possible.
# - if tlsVerify is true and originCAPool is non-empty, cloudflared will
# treat it as the filepath to the root CA.
# cloudflared CLI option: `origin-ca-pool`
originCAPool @2 :Text;
# Hostname to use when verifying TLS connections to the origin.
# cloudflared CLI option: `origin-server-name`
originServerName @3 :Text;
}
struct HTTPOriginConfig {
# HTTP(S) URL of the origin service.
# cloudflared CLI option: `url`
originAddr :union {
http @0 :CapnpHTTPURL;
unix @1 :UnixPath;
}
# the TCP keep-alive period (in ns) for an active network connection.
# Zero means keep-alives are not enabled.
# cloudflared CLI option: `proxy-tcp-keepalive`
tcpKeepAlive @2 :Int64;
# whether cloudflared should use a "happy eyeballs"-compliant procedure
# to connect to origins that resolve to both IPv4 and IPv6 addresses
# negation of cloudflared CLI option: `proxy-no-happy-eyeballs`
dialDualStack @3 :Bool;
# maximum time (in ns) for cloudflared to wait for a TLS handshake
# with the origin. Zero means no timeout.
# cloudflared CLI option: `proxy-tls-timeout`
tlsHandshakeTimeout @4 :Int64;
# Whether cloudflared should verify TLS connections to the origin.
# negation of cloudflared CLI option: `no-tls-verify`
tlsVerify @5 :Bool;
# originCAPool specifies the root CA that cloudflared should use when
# verifying TLS connections to the origin.
# - if tlsVerify is false, originCAPool will be ignored.
# - if tlsVerify is true and originCAPool is empty, the system CA pool
# will be loaded if possible.
# - if tlsVerify is true and originCAPool is non-empty, cloudflared will
# treat it as the filepath to the root CA.
# cloudflared CLI option: `origin-ca-pool`
originCAPool @6 :Text;
# Hostname to use when verifying TLS connections to the origin.
# cloudflared CLI option: `origin-server-name`
originServerName @7 :Text;
# maximum number of idle (keep-alive) connections for cloudflared to
# keep open with the origin. Zero means no limit.
# cloudflared CLI option: `proxy-keepalive-connections`
maxIdleConnections @8 :UInt64;
# maximum time (in ns) for an idle (keep-alive) connection to remain
# idle before closing itself. Zero means no timeout.
# cloudflared CLI option: `proxy-keepalive-timeout`
idleConnectionTimeout @9 :Int64;
# maximum amount of time a dial will wait for a connect to complete.
proxyConnectionTimeout @10 :Int64;
# The amount of time to wait for origin's first response headers after fully
# writing the request headers if the request has an "Expect: 100-continue" header.
# Zero means no timeout and causes the body to be sent immediately, without
# waiting for the server to approve.
expectContinueTimeout @11 :Int64;
# Whether cloudflared should allow chunked transfer encoding to the
# origin. (This should be disabled for WSGI origins, for example.)
# negation of cloudflared CLI option: `no-chunked-encoding`
chunkedEncoding @12 :Bool;
}
# URL for a HTTP origin, capnp doesn't have native support for URL, so represent it as Text
struct CapnpHTTPURL {
url @0: Text;
}
# Path to a unix socket
struct UnixPath {
path @0: Text;
}
# configuration for cloudflared to provide a DNS over HTTPS proxy server
struct DoHProxyConfig {
# The hostname for the DoH proxy server to listen on.
# cloudflared CLI option: `proxy-dns-address`
listenHost @0 :Text;
# The port for the DoH proxy server to listen on.
# cloudflared CLI option: `proxy-dns-port`
listenPort @1 :UInt16;
# Upstream endpoint URLs for the DoH proxy server.
# cloudflared CLI option: `proxy-dns-upstream`
upstreams @2 :List(Text);
}
struct HelloWorldOriginConfig {
# nothing to configure
}
struct Tag {
name @0 :Text;
value @1 :Text;
}
enum ExistingTunnelPolicy {
ignore @0;
disconnect @1;
balance @2;
}
struct ServerInfo {
locationName @0 :Text;
}
struct UseConfigurationResult {
success @0 :Bool;
errorMessage @1 :Text;
}
interface TunnelServer {
registerTunnel @0 (originCert :Data, hostname :Text, options :RegistrationOptions) -> (result :TunnelRegistration);
getServerInfo @1 () -> (result :ServerInfo);
unregisterTunnel @2 (gracePeriodNanoSec :Int64) -> ();
connect @3 (parameters :CapnpConnectParameters) -> (result :ConnectResult);
}
interface ClientService {
useConfiguration @0 (clientServiceConfig :ClientConfig) -> (result :UseConfigurationResult);
}