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FILE / ScuroNeko/mtg
network/sockopts.go
Исходный файл и его история в репозитории.
appolimp
5f81ae3743
TCP keepalive was configured (SetKeepAlivePeriod) but never actually enabled (SO_KEEPALIVE) on accepted client connections. Go 1.26's SetKeepAlivePeriod only sets TCP_KEEPIDLE — it does not call setsockopt(SO_KEEPALIVE, 1). Without SO_KEEPALIVE the kernel never sends probe packets, so dead connections from sleeping mobile clients linger until the idle timeout fires. Replace SetKeepAlive + SetKeepAlivePeriod with net.KeepAliveConfig (available since Go 1.24) for explicit per-socket control: Idle: 30s (time before first probe) Interval: 10s (between probes) Count: 3 (failed probes to declare dead) This detects dead connections in ~60s instead of relying on system defaults (tcp_keepalive_intvl=75s, probes=9 → up to 11 minutes). Increase the default idle timeout from 1 minute to 5 minutes. MTProto clients send ping_delay_disconnect every ~60s, which resets the idle timer. The previous 1-minute default created a race: if a ping arrived even 1–2 seconds late the relay was killed. A 5-minute window also survives typical mobile sleep periods (phone idle 2–5 min) where the NAT mapping is still alive and the connection can resume without reconnection. Ref: #132
47 lines
1.3 KiB
Go
47 lines
1.3 KiB
Go
package network
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import (
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"fmt"
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"net"
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)
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// SetClientSocketOptions tunes a TCP socket that represents a connection to
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// end user (not Telegram service or fronting domain).
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//
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// bufferSize setting is deprecated and ignored.
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func SetClientSocketOptions(conn net.Conn, bufferSize int) error {
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return setCommonSocketOptions(conn.(*net.TCPConn)) //nolint: forcetypeassert
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}
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// SetServerSocketOptions tunes a TCP socket that represents a connection to
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// remote server like Telegram or fronting domain (but not end user).
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func SetServerSocketOptions(conn net.Conn, bufferSize int) error {
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return setCommonSocketOptions(conn.(*net.TCPConn)) //nolint: forcetypeassert
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}
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func setCommonSocketOptions(conn *net.TCPConn) error {
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if err := conn.SetKeepAliveConfig(net.KeepAliveConfig{
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Enable: true,
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Idle: DefaultKeepAliveIdle,
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Interval: DefaultKeepAliveInterval,
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Count: DefaultKeepAliveCount,
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}); err != nil {
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return fmt.Errorf("cannot configure TCP keepalive: %w", err)
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}
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if err := conn.SetLinger(tcpLingerTimeout); err != nil {
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return fmt.Errorf("cannot set TCP linger timeout: %w", err)
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}
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rawConn, err := conn.SyscallConn()
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if err != nil {
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return fmt.Errorf("cannot get underlying raw connection: %w", err)
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}
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if err := setSocketReuseAddrPort(rawConn); err != nil {
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return fmt.Errorf("cannot setup SO_REUSEADDR/PORT: %w", err)
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}
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return nil
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}
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