Andrew Beresford
cf70a0cbe1
Exposes TCP keepalive configuration via listener and dialer metadata: keepalive: true keepalive.idle: 30s keepalive.interval: 10s keepalive.count: 6 When enabled, the OS sends keepalive probes after the idle period and tears down the socket if the remote does not respond. This causes any blocked Read() on a dead connection to return promptly, releasing goroutines and memory — covering both legs of a CONNECT tunnel (the inbound client connection via the listener, and the outbound upstream connection via the dialer). This is the correct alternative to a hard application-level read deadline (SetReadDeadline) for detecting dead connections, as it distinguishes truly dead connections from legitimately idle ones. Relates to: https://github.com/go-gost/x/issues/91
34 lines
692 B
Go
34 lines
692 B
Go
package tcp
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import (
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"time"
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md "github.com/go-gost/core/metadata"
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mdutil "github.com/go-gost/x/metadata/util"
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)
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const (
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dialTimeout = "dialTimeout"
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)
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const (
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defaultDialTimeout = 5 * time.Second
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)
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type metadata struct {
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dialTimeout time.Duration
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keepalive bool
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keepaliveIdle time.Duration
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keepaliveInterval time.Duration
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keepaliveCount int
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}
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func (d *tcpDialer) parseMetadata(md md.Metadata) (err error) {
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d.md.keepalive = mdutil.GetBool(md, "keepalive")
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d.md.keepaliveIdle = mdutil.GetDuration(md, "keepalive.idle")
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d.md.keepaliveInterval = mdutil.GetDuration(md, "keepalive.interval")
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d.md.keepaliveCount = mdutil.GetInt(md, "keepalive.count")
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return
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}
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