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https://github.com/cloudflare/cloudflared.git
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3bf9217de5
Make sure to enforce snapshots of features and client information for each connection so that the feature information can change in the background. This allows for new features to only be applied to a connection if it completely disconnects and attempts a reconnect. Updates the feature refresh time to 1 hour from previous cloudflared versions which refreshed every 6 hours. Closes TUN-9319
85 lines
2.2 KiB
Go
85 lines
2.2 KiB
Go
package features
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import "slices"
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const (
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FeatureSerializedHeaders = "serialized_headers"
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FeatureQuickReconnects = "quick_reconnects"
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FeatureAllowRemoteConfig = "allow_remote_config"
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FeatureDatagramV2 = "support_datagram_v2"
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FeaturePostQuantum = "postquantum"
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FeatureQUICSupportEOF = "support_quic_eof"
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FeatureManagementLogs = "management_logs"
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FeatureDatagramV3_1 = "support_datagram_v3_1"
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DeprecatedFeatureDatagramV3 = "support_datagram_v3" // Deprecated: TUN-9291
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)
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var defaultFeatures = []string{
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FeatureAllowRemoteConfig,
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FeatureSerializedHeaders,
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FeatureDatagramV2,
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FeatureQUICSupportEOF,
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FeatureManagementLogs,
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}
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// List of features that are no longer in-use.
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var deprecatedFeatures = []string{
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DeprecatedFeatureDatagramV3,
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}
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// Features set by user provided flags
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type staticFeatures struct {
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PostQuantumMode *PostQuantumMode
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}
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type FeatureSnapshot struct {
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PostQuantum PostQuantumMode
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DatagramVersion DatagramVersion
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// We provide the list of features since we need it to send in the ConnectionOptions during connection
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// registrations.
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FeaturesList []string
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}
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type PostQuantumMode uint8
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const (
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// Prefer post quantum, but fallback if connection cannot be established
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PostQuantumPrefer PostQuantumMode = iota
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// If the user passes the --post-quantum flag, we override
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// CurvePreferences to only support hybrid post-quantum key agreements.
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PostQuantumStrict
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)
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type DatagramVersion string
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const (
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// DatagramV2 is the currently supported datagram protocol for UDP and ICMP packets
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DatagramV2 DatagramVersion = FeatureDatagramV2
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// DatagramV3 is a new datagram protocol for UDP and ICMP packets. It is not backwards compatible with datagram v2.
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DatagramV3 DatagramVersion = FeatureDatagramV3_1
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)
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// Remove any duplicate features from the list and remove deprecated features
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func dedupAndRemoveFeatures(features []string) []string {
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// Convert the slice into a set
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set := map[string]bool{}
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for _, feature := range features {
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// Remove deprecated features from the provided list
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if slices.Contains(deprecatedFeatures, feature) {
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continue
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}
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set[feature] = true
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}
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// Convert the set back into a slice
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keys := make([]string, len(set))
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i := 0
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for str := range set {
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keys[i] = str
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i++
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}
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return keys
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}
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