mirror of
https://github.com/XTLS/Xray-core.git
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152 lines
4.0 KiB
Go
152 lines
4.0 KiB
Go
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package policy
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import (
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"context"
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"runtime"
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"time"
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"github.com/xtls/xray-core/v1/common/platform"
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"github.com/xtls/xray-core/v1/features"
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)
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// Timeout contains limits for connection timeout.
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type Timeout struct {
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// Timeout for handshake phase in a connection.
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Handshake time.Duration
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// Timeout for connection being idle, i.e., there is no egress or ingress traffic in this connection.
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ConnectionIdle time.Duration
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// Timeout for an uplink only connection, i.e., the downlink of the connection has been closed.
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UplinkOnly time.Duration
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// Timeout for an downlink only connection, i.e., the uplink of the connection has been closed.
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DownlinkOnly time.Duration
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}
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// Stats contains settings for stats counters.
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type Stats struct {
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// Whether or not to enable stat counter for user uplink traffic.
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UserUplink bool
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// Whether or not to enable stat counter for user downlink traffic.
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UserDownlink bool
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}
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// Buffer contains settings for internal buffer.
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type Buffer struct {
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// Size of buffer per connection, in bytes. -1 for unlimited buffer.
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PerConnection int32
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}
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// SystemStats contains stat policy settings on system level.
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type SystemStats struct {
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// Whether or not to enable stat counter for uplink traffic in inbound handlers.
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InboundUplink bool
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// Whether or not to enable stat counter for downlink traffic in inbound handlers.
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InboundDownlink bool
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// Whether or not to enable stat counter for uplink traffic in outbound handlers.
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OutboundUplink bool
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// Whether or not to enable stat counter for downlink traffic in outbound handlers.
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OutboundDownlink bool
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}
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// System contains policy settings at system level.
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type System struct {
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Stats SystemStats
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Buffer Buffer
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}
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// Session is session based settings for controlling Xray requests. It contains various settings (or limits) that may differ for different users in the context.
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type Session struct {
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Timeouts Timeout // Timeout settings
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Stats Stats
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Buffer Buffer
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}
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// Manager is a feature that provides Policy for the given user by its id or level.
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//
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// xray:api:stable
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type Manager interface {
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features.Feature
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// ForLevel returns the Session policy for the given user level.
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ForLevel(level uint32) Session
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// ForSystem returns the System policy for Xray system.
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ForSystem() System
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}
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// ManagerType returns the type of Manager interface. Can be used to implement common.HasType.
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//
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// xray:api:stable
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func ManagerType() interface{} {
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return (*Manager)(nil)
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}
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var defaultBufferSize int32
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func init() {
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const key = "xray.ray.buffer.size"
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const defaultValue = -17
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size := platform.EnvFlag{
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Name: key,
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AltName: platform.NormalizeEnvName(key),
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}.GetValueAsInt(defaultValue)
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switch size {
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case 0:
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defaultBufferSize = -1 // For pipe to use unlimited size
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case defaultValue: // Env flag not defined. Use default values per CPU-arch.
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switch runtime.GOARCH {
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case "arm", "mips", "mipsle":
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defaultBufferSize = 0
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case "arm64", "mips64", "mips64le":
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defaultBufferSize = 4 * 1024 // 4k cache for low-end devices
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default:
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defaultBufferSize = 512 * 1024
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}
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default:
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defaultBufferSize = int32(size) * 1024 * 1024
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}
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}
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func defaultBufferPolicy() Buffer {
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return Buffer{
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PerConnection: defaultBufferSize,
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}
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}
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// SessionDefault returns the Policy when user is not specified.
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func SessionDefault() Session {
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return Session{
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Timeouts: Timeout{
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// Align Handshake timeout with nginx client_header_timeout
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// So that this value will not indicate server identity
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Handshake: time.Second * 60,
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ConnectionIdle: time.Second * 300,
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UplinkOnly: time.Second * 1,
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DownlinkOnly: time.Second * 1,
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},
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Stats: Stats{
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UserUplink: false,
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UserDownlink: false,
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},
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Buffer: defaultBufferPolicy(),
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}
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}
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type policyKey int32
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const (
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bufferPolicyKey policyKey = 0
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)
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func ContextWithBufferPolicy(ctx context.Context, p Buffer) context.Context {
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return context.WithValue(ctx, bufferPolicyKey, p)
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}
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func BufferPolicyFromContext(ctx context.Context) Buffer {
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pPolicy := ctx.Value(bufferPolicyKey)
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if pPolicy == nil {
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return defaultBufferPolicy()
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}
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return pPolicy.(Buffer)
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}
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