Xray-core/common/session/context.go

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package session
import (
"context"
_ "unsafe"
"github.com/xtls/xray-core/features/routing"
)
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//go:linkname IndependentCancelCtx context.newCancelCtx
func IndependentCancelCtx(parent context.Context) context.Context
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type sessionKey int
const (
idSessionKey sessionKey = iota
inboundSessionKey
outboundSessionKey
contentSessionKey
muxPreferedSessionKey
sockoptSessionKey
trackedConnectionErrorKey
dispatcherKey
timeoutOnlyKey
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)
// ContextWithID returns a new context with the given ID.
func ContextWithID(ctx context.Context, id ID) context.Context {
return context.WithValue(ctx, idSessionKey, id)
}
// IDFromContext returns ID in this context, or 0 if not contained.
func IDFromContext(ctx context.Context) ID {
if id, ok := ctx.Value(idSessionKey).(ID); ok {
return id
}
return 0
}
func ContextWithInbound(ctx context.Context, inbound *Inbound) context.Context {
return context.WithValue(ctx, inboundSessionKey, inbound)
}
func InboundFromContext(ctx context.Context) *Inbound {
if inbound, ok := ctx.Value(inboundSessionKey).(*Inbound); ok {
return inbound
}
return nil
}
func ContextWithOutbound(ctx context.Context, outbound *Outbound) context.Context {
return context.WithValue(ctx, outboundSessionKey, outbound)
}
func OutboundFromContext(ctx context.Context) *Outbound {
if outbound, ok := ctx.Value(outboundSessionKey).(*Outbound); ok {
return outbound
}
return nil
}
func ContextWithContent(ctx context.Context, content *Content) context.Context {
return context.WithValue(ctx, contentSessionKey, content)
}
func ContentFromContext(ctx context.Context) *Content {
if content, ok := ctx.Value(contentSessionKey).(*Content); ok {
return content
}
return nil
}
// ContextWithMuxPrefered returns a new context with the given bool
func ContextWithMuxPrefered(ctx context.Context, forced bool) context.Context {
return context.WithValue(ctx, muxPreferedSessionKey, forced)
}
// MuxPreferedFromContext returns value in this context, or false if not contained.
func MuxPreferedFromContext(ctx context.Context) bool {
if val, ok := ctx.Value(muxPreferedSessionKey).(bool); ok {
return val
}
return false
}
// ContextWithSockopt returns a new context with Socket configs included
func ContextWithSockopt(ctx context.Context, s *Sockopt) context.Context {
return context.WithValue(ctx, sockoptSessionKey, s)
}
// SockoptFromContext returns Socket configs in this context, or nil if not contained.
func SockoptFromContext(ctx context.Context) *Sockopt {
if sockopt, ok := ctx.Value(sockoptSessionKey).(*Sockopt); ok {
return sockopt
}
return nil
}
func GetForcedOutboundTagFromContext(ctx context.Context) string {
if ContentFromContext(ctx) == nil {
return ""
}
return ContentFromContext(ctx).Attribute("forcedOutboundTag")
}
func SetForcedOutboundTagToContext(ctx context.Context, tag string) context.Context {
if contentFromContext := ContentFromContext(ctx); contentFromContext == nil {
ctx = ContextWithContent(ctx, &Content{})
}
ContentFromContext(ctx).SetAttribute("forcedOutboundTag", tag)
return ctx
}
type TrackedRequestErrorFeedback interface {
SubmitError(err error)
}
func SubmitOutboundErrorToOriginator(ctx context.Context, err error) {
if errorTracker := ctx.Value(trackedConnectionErrorKey); errorTracker != nil {
errorTracker := errorTracker.(TrackedRequestErrorFeedback)
errorTracker.SubmitError(err)
}
}
func TrackedConnectionError(ctx context.Context, tracker TrackedRequestErrorFeedback) context.Context {
return context.WithValue(ctx, trackedConnectionErrorKey, tracker)
}
func ContextWithDispatcher(ctx context.Context, dispatcher routing.Dispatcher) context.Context {
return context.WithValue(ctx, dispatcherKey, dispatcher)
}
func DispatcherFromContext(ctx context.Context) routing.Dispatcher {
if dispatcher, ok := ctx.Value(dispatcherKey).(routing.Dispatcher); ok {
return dispatcher
}
return nil
}
func ContextWithTimeoutOnly(ctx context.Context, only bool) context.Context {
return context.WithValue(ctx, timeoutOnlyKey, only)
}
func TimeoutOnlyFromContext(ctx context.Context) bool {
if val, ok := ctx.Value(timeoutOnlyKey).(bool); ok {
return val
}
return false
}