kevin
616d30bc08
Add comprehensive console logging at key data path points: - [TUN-RX]: per-packet TUN read (size, proto, src/dst IP, slow write detection) - [TUN-TX]: per-packet TUN write (size, success/error) - [WS-RX]: per-packet WebSocket read from client (size, proto, src/dst IP) - [WS-TX]: per-packet WebSocket write to client (size, lockWaitMs, writeMs) - [ROUTE]: routing decisions (TUN->client, client->tun, client->relay, anti-spoof) - [CONN]: connection lifecycle (init, ready, stats every 10s, disconnect with final stats) - [STATS]: global traffic stats every 10s (clients, rx/tx bytes and rates) - [PING]: WebSocket ping failures - [WS]: WebSocket upgrade with client IP and auth method - [TUN]: MTU set confirmation, VPN start/stop environment info
40 lines
1019 B
Go
40 lines
1019 B
Go
//go:build linux
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package vpn
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import (
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"fmt"
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"log"
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"net"
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)
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func (t *TUNInterface) Configure(localIP net.IP, prefix int, peerIP net.IP) error {
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if err := execCmd("ip", "link", "set", "dev", t.Name(), "up"); err != nil {
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return err
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}
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if localIP == nil {
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return nil
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}
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localCidr := fmt.Sprintf("%s/%d", localIP.String(), prefix)
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if peerIP != nil {
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if err := execCmd("ip", "addr", "add", "dev", t.Name(), localCidr, "peer", peerIP.String()); err == nil {
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return nil
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}
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}
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return execCmd("ip", "addr", "add", "dev", t.Name(), localCidr)
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}
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func (t *TUNInterface) AddSubnetRoute(subnet *net.IPNet) error {
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return execCmd("ip", "route", "add", subnet.String(), "dev", t.Name())
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}
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func (t *TUNInterface) SetMTU(mtu int) error {
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err := execCmd("ip", "link", "set", "dev", t.Name(), "mtu", fmt.Sprintf("%d", mtu))
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if err != nil {
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log.Printf("[TUN] set MTU dev=%s mtu=%d ok=false err=%v", t.Name(), mtu, err)
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} else {
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log.Printf("[TUN] set MTU dev=%s mtu=%d ok=true", t.Name(), mtu)
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}
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return err
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}
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