587 lines
16 KiB
Go
587 lines
16 KiB
Go
package pogs
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import (
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"context"
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"crypto/tls"
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"crypto/x509"
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"fmt"
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"net"
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"net/http"
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"net/url"
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"time"
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"github.com/cloudflare/cloudflared/originservice"
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"github.com/cloudflare/cloudflared/tlsconfig"
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"github.com/cloudflare/cloudflared/tunnelrpc"
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"github.com/pkg/errors"
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capnp "zombiezen.com/go/capnproto2"
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"zombiezen.com/go/capnproto2/pogs"
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"zombiezen.com/go/capnproto2/rpc"
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)
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///
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/// Structs
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///
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type ClientConfig struct {
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Version uint64
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AutoUpdateFrequency time.Duration
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MetricsUpdateFrequency time.Duration
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HeartbeatInterval time.Duration
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MaxFailedHeartbeats uint64
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GracePeriod time.Duration
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DoHProxyConfigs []*DoHProxyConfig
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ReverseProxyConfigs []*ReverseProxyConfig
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NumHAConnections uint8
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}
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type UseConfigurationResult struct {
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Success bool
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ErrorMessage string
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}
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type DoHProxyConfig struct {
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ListenHost string
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ListenPort uint16
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Upstreams []string
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}
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type ReverseProxyConfig struct {
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TunnelHostname string
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Origin OriginConfig
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Retries uint64
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ConnectionTimeout time.Duration
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CompressionQuality uint64
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}
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func NewReverseProxyConfig(
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tunnelHostname string,
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originConfig OriginConfig,
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retries uint64,
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connectionTimeout time.Duration,
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compressionQuality uint64,
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) (*ReverseProxyConfig, error) {
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if originConfig == nil {
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return nil, fmt.Errorf("NewReverseProxyConfig: originConfig was null")
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}
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return &ReverseProxyConfig{
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TunnelHostname: tunnelHostname,
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Origin: originConfig,
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Retries: retries,
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ConnectionTimeout: connectionTimeout,
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CompressionQuality: compressionQuality,
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}, nil
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}
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//go-sumtype:decl OriginConfig
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type OriginConfig interface {
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// Service returns a OriginService used to proxy to the origin
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Service() (originservice.OriginService, error)
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// go-sumtype requires at least one unexported method, otherwise it will complain that interface is not sealed
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isOriginConfig()
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}
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type HTTPOriginConfig struct {
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URL OriginAddr `capnp:"url"`
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TCPKeepAlive time.Duration `capnp:"tcpKeepAlive"`
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DialDualStack bool
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TLSHandshakeTimeout time.Duration `capnp:"tlsHandshakeTimeout"`
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TLSVerify bool `capnp:"tlsVerify"`
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OriginCAPool string
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OriginServerName string
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MaxIdleConnections uint64
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IdleConnectionTimeout time.Duration
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ProxyConnectTimeout time.Duration
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ExpectContinueTimeout time.Duration
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ChunkedEncoding bool
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}
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type OriginAddr interface {
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Addr() string
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}
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type HTTPURL struct {
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URL *url.URL
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}
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func (ha *HTTPURL) Addr() string {
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return ha.URL.String()
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}
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func (ha *HTTPURL) capnpHTTPURL() *CapnpHTTPURL {
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return &CapnpHTTPURL{
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URL: ha.URL.String(),
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}
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}
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// URL for a HTTP origin, capnp doesn't have native support for URL, so represent it as string
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type CapnpHTTPURL struct {
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URL string `capnp:"url"`
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}
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type UnixPath struct {
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Path string
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}
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func (up *UnixPath) Addr() string {
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return up.Path
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}
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func (hc *HTTPOriginConfig) Service() (originservice.OriginService, error) {
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rootCAs, err := tlsconfig.LoadCustomCertPool(hc.OriginCAPool)
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if err != nil {
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return nil, err
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}
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dialContext := (&net.Dialer{
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Timeout: hc.ProxyConnectTimeout,
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KeepAlive: hc.TCPKeepAlive,
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DualStack: hc.DialDualStack,
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}).DialContext
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transport := &http.Transport{
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Proxy: http.ProxyFromEnvironment,
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DialContext: dialContext,
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TLSClientConfig: &tls.Config{
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RootCAs: rootCAs,
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ServerName: hc.OriginServerName,
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InsecureSkipVerify: hc.TLSVerify,
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},
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TLSHandshakeTimeout: hc.TLSHandshakeTimeout,
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MaxIdleConns: int(hc.MaxIdleConnections),
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IdleConnTimeout: hc.IdleConnectionTimeout,
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ExpectContinueTimeout: hc.ExpectContinueTimeout,
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}
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if unixPath, ok := hc.URL.(*UnixPath); ok {
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transport.DialContext = func(ctx context.Context, _, _ string) (net.Conn, error) {
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return dialContext(ctx, "unix", unixPath.Addr())
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}
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}
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return originservice.NewHTTPService(transport, hc.URL.Addr(), hc.ChunkedEncoding), nil
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}
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func (_ *HTTPOriginConfig) isOriginConfig() {}
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type WebSocketOriginConfig struct {
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URL string `capnp:"url"`
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TLSVerify bool `capnp:"tlsVerify"`
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OriginCAPool string
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OriginServerName string
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}
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func (wsc *WebSocketOriginConfig) Service() (originservice.OriginService, error) {
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rootCAs, err := tlsconfig.LoadCustomCertPool(wsc.OriginCAPool)
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if err != nil {
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return nil, err
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}
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tlsConfig := &tls.Config{
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RootCAs: rootCAs,
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ServerName: wsc.OriginServerName,
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InsecureSkipVerify: wsc.TLSVerify,
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}
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return originservice.NewWebSocketService(tlsConfig, wsc.URL)
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}
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func (_ *WebSocketOriginConfig) isOriginConfig() {}
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type HelloWorldOriginConfig struct{}
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func (_ *HelloWorldOriginConfig) Service() (originservice.OriginService, error) {
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helloCert, err := tlsconfig.GetHelloCertificateX509()
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if err != nil {
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return nil, errors.Wrap(err, "Cannot get Hello World server certificate")
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}
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rootCAs := x509.NewCertPool()
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rootCAs.AddCert(helloCert)
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transport := &http.Transport{
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Proxy: http.ProxyFromEnvironment,
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DialContext: (&net.Dialer{
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Timeout: 30 * time.Second,
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KeepAlive: 30 * time.Second,
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DualStack: true,
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}).DialContext,
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TLSClientConfig: &tls.Config{
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RootCAs: rootCAs,
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},
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MaxIdleConns: 100,
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IdleConnTimeout: 90 * time.Second,
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TLSHandshakeTimeout: 10 * time.Second,
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ExpectContinueTimeout: 1 * time.Second,
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}
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return originservice.NewHelloWorldService(transport)
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}
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func (_ *HelloWorldOriginConfig) isOriginConfig() {}
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/*
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* Boilerplate to convert between these structs and the primitive structs
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* generated by capnp-go.
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* Mnemonics for variable names in this section:
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* - `p` is for POGS (plain old Go struct)
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* - `s` (and `ss`) is for "capnp.Struct", which is the fundamental type
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* underlying the capnp-go data structures.
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*/
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func MarshalClientConfig(s tunnelrpc.ClientConfig, p *ClientConfig) error {
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s.SetVersion(p.Version)
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s.SetAutoUpdateFrequency(p.AutoUpdateFrequency.Nanoseconds())
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s.SetMetricsUpdateFrequency(p.MetricsUpdateFrequency.Nanoseconds())
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s.SetHeartbeatInterval(p.HeartbeatInterval.Nanoseconds())
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s.SetMaxFailedHeartbeats(p.MaxFailedHeartbeats)
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s.SetGracePeriod(p.GracePeriod.Nanoseconds())
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s.SetNumHAConnections(p.NumHAConnections)
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err := marshalDoHProxyConfigs(s, p.DoHProxyConfigs)
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if err != nil {
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return err
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}
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return marshalReverseProxyConfigs(s, p.ReverseProxyConfigs)
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}
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func marshalDoHProxyConfigs(s tunnelrpc.ClientConfig, dohProxyConfigs []*DoHProxyConfig) error {
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capnpList, err := s.NewDohProxyConfigs(int32(len(dohProxyConfigs)))
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if err != nil {
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return err
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}
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for i, unmarshalledConfig := range dohProxyConfigs {
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err := MarshalDoHProxyConfig(capnpList.At(i), unmarshalledConfig)
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if err != nil {
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return err
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}
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}
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return nil
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}
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func marshalReverseProxyConfigs(s tunnelrpc.ClientConfig, reverseProxyConfigs []*ReverseProxyConfig) error {
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capnpList, err := s.NewReverseProxyConfigs(int32(len(reverseProxyConfigs)))
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if err != nil {
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return err
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}
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for i, unmarshalledConfig := range reverseProxyConfigs {
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err := MarshalReverseProxyConfig(capnpList.At(i), unmarshalledConfig)
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if err != nil {
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return err
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}
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}
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return nil
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}
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func UnmarshalClientConfig(s tunnelrpc.ClientConfig) (*ClientConfig, error) {
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p := new(ClientConfig)
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p.Version = s.Version()
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p.AutoUpdateFrequency = time.Duration(s.AutoUpdateFrequency())
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p.MetricsUpdateFrequency = time.Duration(s.MetricsUpdateFrequency())
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p.HeartbeatInterval = time.Duration(s.HeartbeatInterval())
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p.MaxFailedHeartbeats = s.MaxFailedHeartbeats()
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p.GracePeriod = time.Duration(s.GracePeriod())
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p.NumHAConnections = s.NumHAConnections()
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dohProxyConfigs, err := unmarshalDoHProxyConfigs(s)
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if err != nil {
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return nil, err
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}
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p.DoHProxyConfigs = dohProxyConfigs
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reverseProxyConfigs, err := unmarshalReverseProxyConfigs(s)
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if err != nil {
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return nil, err
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}
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p.ReverseProxyConfigs = reverseProxyConfigs
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return p, err
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}
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func unmarshalDoHProxyConfigs(s tunnelrpc.ClientConfig) ([]*DoHProxyConfig, error) {
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var result []*DoHProxyConfig
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marshalledDoHProxyConfigs, err := s.DohProxyConfigs()
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if err != nil {
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return nil, err
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}
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for i := 0; i < marshalledDoHProxyConfigs.Len(); i++ {
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ss := marshalledDoHProxyConfigs.At(i)
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dohProxyConfig, err := UnmarshalDoHProxyConfig(ss)
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if err != nil {
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return nil, err
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}
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result = append(result, dohProxyConfig)
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}
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return result, nil
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}
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func unmarshalReverseProxyConfigs(s tunnelrpc.ClientConfig) ([]*ReverseProxyConfig, error) {
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var result []*ReverseProxyConfig
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marshalledReverseProxyConfigs, err := s.ReverseProxyConfigs()
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if err != nil {
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return nil, err
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}
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for i := 0; i < marshalledReverseProxyConfigs.Len(); i++ {
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ss := marshalledReverseProxyConfigs.At(i)
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reverseProxyConfig, err := UnmarshalReverseProxyConfig(ss)
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if err != nil {
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return nil, err
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}
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result = append(result, reverseProxyConfig)
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}
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return result, nil
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}
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func MarshalUseConfigurationResult(s tunnelrpc.UseConfigurationResult, p *UseConfigurationResult) error {
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return pogs.Insert(tunnelrpc.UseConfigurationResult_TypeID, s.Struct, p)
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}
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func UnmarshalUseConfigurationResult(s tunnelrpc.UseConfigurationResult) (*UseConfigurationResult, error) {
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p := new(UseConfigurationResult)
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err := pogs.Extract(p, tunnelrpc.UseConfigurationResult_TypeID, s.Struct)
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return p, err
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}
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func MarshalDoHProxyConfig(s tunnelrpc.DoHProxyConfig, p *DoHProxyConfig) error {
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return pogs.Insert(tunnelrpc.DoHProxyConfig_TypeID, s.Struct, p)
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}
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func UnmarshalDoHProxyConfig(s tunnelrpc.DoHProxyConfig) (*DoHProxyConfig, error) {
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p := new(DoHProxyConfig)
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err := pogs.Extract(p, tunnelrpc.DoHProxyConfig_TypeID, s.Struct)
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return p, err
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}
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func MarshalReverseProxyConfig(s tunnelrpc.ReverseProxyConfig, p *ReverseProxyConfig) error {
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s.SetTunnelHostname(p.TunnelHostname)
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switch config := p.Origin.(type) {
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case *HTTPOriginConfig:
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ss, err := s.Origin().NewHttp()
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if err != nil {
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return err
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}
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if err := MarshalHTTPOriginConfig(ss, config); err != nil {
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return err
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}
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case *WebSocketOriginConfig:
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ss, err := s.Origin().NewWebsocket()
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if err != nil {
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return err
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}
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if err := MarshalWebSocketOriginConfig(ss, config); err != nil {
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return err
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}
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case *HelloWorldOriginConfig:
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ss, err := s.Origin().NewHelloWorld()
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if err != nil {
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return err
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}
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if err := MarshalHelloWorldOriginConfig(ss, config); err != nil {
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return err
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}
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default:
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return fmt.Errorf("Unknown type for config: %T", config)
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}
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s.SetRetries(p.Retries)
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s.SetConnectionTimeout(p.ConnectionTimeout.Nanoseconds())
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s.SetCompressionQuality(p.CompressionQuality)
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return nil
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}
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func UnmarshalReverseProxyConfig(s tunnelrpc.ReverseProxyConfig) (*ReverseProxyConfig, error) {
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p := new(ReverseProxyConfig)
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tunnelHostname, err := s.TunnelHostname()
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if err != nil {
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return nil, err
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}
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p.TunnelHostname = tunnelHostname
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switch s.Origin().Which() {
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case tunnelrpc.ReverseProxyConfig_origin_Which_http:
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ss, err := s.Origin().Http()
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if err != nil {
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return nil, err
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}
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config, err := UnmarshalHTTPOriginConfig(ss)
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if err != nil {
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return nil, err
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}
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p.Origin = config
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case tunnelrpc.ReverseProxyConfig_origin_Which_websocket:
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ss, err := s.Origin().Websocket()
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if err != nil {
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return nil, err
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}
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config, err := UnmarshalWebSocketOriginConfig(ss)
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if err != nil {
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return nil, err
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}
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p.Origin = config
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case tunnelrpc.ReverseProxyConfig_origin_Which_helloWorld:
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ss, err := s.Origin().HelloWorld()
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if err != nil {
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return nil, err
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}
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config, err := UnmarshalHelloWorldOriginConfig(ss)
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if err != nil {
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return nil, err
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}
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p.Origin = config
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}
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p.Retries = s.Retries()
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p.ConnectionTimeout = time.Duration(s.ConnectionTimeout())
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p.CompressionQuality = s.CompressionQuality()
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return p, nil
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}
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func MarshalHTTPOriginConfig(s tunnelrpc.HTTPOriginConfig, p *HTTPOriginConfig) error {
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switch originAddr := p.URL.(type) {
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case *HTTPURL:
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ss, err := s.OriginAddr().NewHttp()
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if err != nil {
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return err
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}
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if err := MarshalHTTPURL(ss, originAddr); err != nil {
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return err
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}
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case *UnixPath:
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ss, err := s.OriginAddr().NewUnix()
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if err != nil {
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return err
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}
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if err := MarshalUnixPath(ss, originAddr); err != nil {
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return err
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}
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default:
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return fmt.Errorf("Unknown type for OriginAddr: %T", originAddr)
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}
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s.SetTcpKeepAlive(p.TCPKeepAlive.Nanoseconds())
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s.SetDialDualStack(p.DialDualStack)
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s.SetTlsHandshakeTimeout(p.TLSHandshakeTimeout.Nanoseconds())
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s.SetTlsVerify(p.TLSVerify)
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s.SetOriginCAPool(p.OriginCAPool)
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s.SetOriginServerName(p.OriginServerName)
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s.SetMaxIdleConnections(p.MaxIdleConnections)
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s.SetIdleConnectionTimeout(p.IdleConnectionTimeout.Nanoseconds())
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s.SetProxyConnectionTimeout(p.ProxyConnectTimeout.Nanoseconds())
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s.SetExpectContinueTimeout(p.ExpectContinueTimeout.Nanoseconds())
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s.SetChunkedEncoding(p.ChunkedEncoding)
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return nil
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}
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func UnmarshalHTTPOriginConfig(s tunnelrpc.HTTPOriginConfig) (*HTTPOriginConfig, error) {
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p := new(HTTPOriginConfig)
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switch s.OriginAddr().Which() {
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case tunnelrpc.HTTPOriginConfig_originAddr_Which_http:
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ss, err := s.OriginAddr().Http()
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if err != nil {
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return nil, err
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}
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originAddr, err := UnmarshalCapnpHTTPURL(ss)
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if err != nil {
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return nil, err
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}
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p.URL = originAddr
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case tunnelrpc.HTTPOriginConfig_originAddr_Which_unix:
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ss, err := s.OriginAddr().Unix()
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if err != nil {
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return nil, err
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}
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originAddr, err := UnmarshalUnixPath(ss)
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if err != nil {
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return nil, err
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}
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p.URL = originAddr
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default:
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return nil, fmt.Errorf("Unknown type for OriginAddr: %T", s.OriginAddr().Which())
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}
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p.TCPKeepAlive = time.Duration(s.TcpKeepAlive())
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p.DialDualStack = s.DialDualStack()
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p.TLSHandshakeTimeout = time.Duration(s.TlsHandshakeTimeout())
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p.TLSVerify = s.TlsVerify()
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originCAPool, err := s.OriginCAPool()
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if err != nil {
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return nil, err
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}
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p.OriginCAPool = originCAPool
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originServerName, err := s.OriginServerName()
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if err != nil {
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return nil, err
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}
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p.OriginServerName = originServerName
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p.MaxIdleConnections = s.MaxIdleConnections()
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p.IdleConnectionTimeout = time.Duration(s.IdleConnectionTimeout())
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p.ProxyConnectTimeout = time.Duration(s.ProxyConnectionTimeout())
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p.ExpectContinueTimeout = time.Duration(s.ExpectContinueTimeout())
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p.ChunkedEncoding = s.ChunkedEncoding()
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return p, nil
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}
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func MarshalHTTPURL(s tunnelrpc.CapnpHTTPURL, p *HTTPURL) error {
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return pogs.Insert(tunnelrpc.CapnpHTTPURL_TypeID, s.Struct, p.capnpHTTPURL())
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}
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func UnmarshalCapnpHTTPURL(s tunnelrpc.CapnpHTTPURL) (*HTTPURL, error) {
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p := new(CapnpHTTPURL)
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err := pogs.Extract(p, tunnelrpc.CapnpHTTPURL_TypeID, s.Struct)
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if err != nil {
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return nil, err
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}
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url, err := url.Parse(p.URL)
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if err != nil {
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return nil, err
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}
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return &HTTPURL{
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URL: url,
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}, nil
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}
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|
|
func MarshalUnixPath(s tunnelrpc.UnixPath, p *UnixPath) error {
|
|
err := pogs.Insert(tunnelrpc.UnixPath_TypeID, s.Struct, p)
|
|
return err
|
|
}
|
|
|
|
func UnmarshalUnixPath(s tunnelrpc.UnixPath) (*UnixPath, error) {
|
|
p := new(UnixPath)
|
|
err := pogs.Extract(p, tunnelrpc.UnixPath_TypeID, s.Struct)
|
|
return p, err
|
|
}
|
|
|
|
func MarshalWebSocketOriginConfig(s tunnelrpc.WebSocketOriginConfig, p *WebSocketOriginConfig) error {
|
|
return pogs.Insert(tunnelrpc.WebSocketOriginConfig_TypeID, s.Struct, p)
|
|
}
|
|
|
|
func UnmarshalWebSocketOriginConfig(s tunnelrpc.WebSocketOriginConfig) (*WebSocketOriginConfig, error) {
|
|
p := new(WebSocketOriginConfig)
|
|
err := pogs.Extract(p, tunnelrpc.WebSocketOriginConfig_TypeID, s.Struct)
|
|
return p, err
|
|
}
|
|
|
|
func MarshalHelloWorldOriginConfig(s tunnelrpc.HelloWorldOriginConfig, p *HelloWorldOriginConfig) error {
|
|
return pogs.Insert(tunnelrpc.HelloWorldOriginConfig_TypeID, s.Struct, p)
|
|
}
|
|
|
|
func UnmarshalHelloWorldOriginConfig(s tunnelrpc.HelloWorldOriginConfig) (*HelloWorldOriginConfig, error) {
|
|
p := new(HelloWorldOriginConfig)
|
|
err := pogs.Extract(p, tunnelrpc.HelloWorldOriginConfig_TypeID, s.Struct)
|
|
return p, err
|
|
}
|
|
|
|
type ClientService interface {
|
|
UseConfiguration(ctx context.Context, config *ClientConfig) (*UseConfigurationResult, error)
|
|
}
|
|
|
|
type ClientService_PogsClient struct {
|
|
Client capnp.Client
|
|
Conn *rpc.Conn
|
|
}
|
|
|
|
func (c *ClientService_PogsClient) Close() error {
|
|
return c.Conn.Close()
|
|
}
|
|
|
|
func (c *ClientService_PogsClient) UseConfiguration(
|
|
ctx context.Context,
|
|
config *ClientConfig,
|
|
) (*UseConfigurationResult, error) {
|
|
client := tunnelrpc.ClientService{Client: c.Client}
|
|
promise := client.UseConfiguration(ctx, func(p tunnelrpc.ClientService_useConfiguration_Params) error {
|
|
clientServiceConfig, err := p.NewClientServiceConfig()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return MarshalClientConfig(clientServiceConfig, config)
|
|
})
|
|
retval, err := promise.Result().Struct()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return UnmarshalUseConfigurationResult(retval)
|
|
}
|