Ivan
b0fad14504
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101 lines
2.5 KiB
Go
101 lines
2.5 KiB
Go
// +build linux
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package interfaces
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import (
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"fmt"
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"net"
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"syscall"
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"time"
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"unsafe"
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"github.com/Sudo-Ivan/reticulum-go/pkg/debug"
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)
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func (tc *TCPClientInterface) setTimeoutsLinux() error {
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tcpConn, ok := tc.conn.(*net.TCPConn)
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if !ok {
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return fmt.Errorf("not a TCP connection")
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}
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rawConn, err := tcpConn.SyscallConn()
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if err != nil {
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return fmt.Errorf("failed to get raw connection: %v", err)
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}
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var sockoptErr error
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err = rawConn.Control(func(fd uintptr) {
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var userTimeout, probeAfter, probeInterval, probeCount int
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if tc.i2pTunneled {
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userTimeout = I2P_USER_TIMEOUT_SEC * 1000
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probeAfter = I2P_PROBE_AFTER_SEC
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probeInterval = I2P_PROBE_INTERVAL_SEC
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probeCount = I2P_PROBES_COUNT
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} else {
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userTimeout = TCP_USER_TIMEOUT_SEC * 1000
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probeAfter = TCP_PROBE_AFTER_SEC
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probeInterval = TCP_PROBE_INTERVAL_SEC
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probeCount = TCP_PROBES_COUNT
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}
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if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, 18, userTimeout); err != nil {
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debug.Log(debug.DEBUG_VERBOSE, "Failed to set TCP_USER_TIMEOUT", "error", err)
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}
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if err := syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, 1); err != nil {
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sockoptErr = fmt.Errorf("failed to enable SO_KEEPALIVE: %v", err)
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return
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}
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if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, 4, probeAfter); err != nil {
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debug.Log(debug.DEBUG_VERBOSE, "Failed to set TCP_KEEPIDLE", "error", err)
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}
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if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, 5, probeInterval); err != nil {
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debug.Log(debug.DEBUG_VERBOSE, "Failed to set TCP_KEEPINTVL", "error", err)
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}
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if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, 6, probeCount); err != nil {
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debug.Log(debug.DEBUG_VERBOSE, "Failed to set TCP_KEEPCNT", "error", err)
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}
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})
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if err != nil {
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return fmt.Errorf("control failed: %v", err)
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}
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if sockoptErr != nil {
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return sockoptErr
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}
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debug.Log(debug.DEBUG_VERBOSE, "TCP keepalive configured (Linux)", "i2p", tc.i2pTunneled)
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return nil
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}
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func (tc *TCPClientInterface) setTimeoutsOSX() error {
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return tc.setTimeoutsLinux()
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}
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func platformGetRTT(fd uintptr) time.Duration {
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var info syscall.TCPInfo
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infoLen := uint32(unsafe.Sizeof(info))
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// TCP_INFO is 11 on Linux
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// #nosec G103
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_, _, errno := syscall.Syscall6(
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syscall.SYS_GETSOCKOPT,
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fd,
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syscall.IPPROTO_TCP,
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11, // TCP_INFO
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uintptr(unsafe.Pointer(&info)),
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uintptr(unsafe.Pointer(&infoLen)),
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0,
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)
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if errno != 0 {
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return 0
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}
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return time.Duration(info.Rtt) * time.Microsecond
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}
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