mirror of
https://github.com/netbirdio/netbird.git
synced 2026-04-16 15:26:40 +00:00
55126f990c
- Move `util/grpc` and `util/net` to `client` so `internal` packages can be accessed - Add methods to return the next best interface after the NetBird interface. - Use `IP_UNICAST_IF` sock opt to force the outgoing interface for the NetBird `net.Dialer` and `net.ListenerConfig` to avoid routing loops. The interface is picked by the new route lookup method. - Some refactoring to avoid import cycles - Old behavior is available through `NB_USE_LEGACY_ROUTING=true` env var
83 lines
2.0 KiB
Go
83 lines
2.0 KiB
Go
//go:build !ios
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package net
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import (
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"fmt"
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"net"
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"sync"
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"github.com/pion/transport/v3"
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log "github.com/sirupsen/logrus"
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)
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func DialUDP(network string, laddr, raddr *net.UDPAddr) (transport.UDPConn, error) {
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if CustomRoutingDisabled() {
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return net.DialUDP(network, laddr, raddr)
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}
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dialer := NewDialer()
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dialer.LocalAddr = laddr
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conn, err := dialer.Dial(network, raddr.String())
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if err != nil {
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return nil, fmt.Errorf("dialing UDP %s: %w", raddr.String(), err)
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}
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switch c := conn.(type) {
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case *net.UDPConn:
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// Advanced routing: plain connection
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return c, nil
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case *Conn:
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// Legacy routing: wrapped connection preserves close hooks
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udpConn, ok := c.Conn.(*net.UDPConn)
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if !ok {
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if err := conn.Close(); err != nil {
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log.Errorf("Failed to close connection: %v", err)
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}
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return nil, fmt.Errorf("expected UDP connection, got %T", c.Conn)
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}
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return &UDPConn{UDPConn: udpConn, ID: c.ID, seenAddrs: &sync.Map{}}, nil
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}
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if err := conn.Close(); err != nil {
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log.Errorf("failed to close connection: %v", err)
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}
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return nil, fmt.Errorf("unexpected connection type: %T", conn)
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}
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func DialTCP(network string, laddr, raddr *net.TCPAddr) (transport.TCPConn, error) {
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if CustomRoutingDisabled() {
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return net.DialTCP(network, laddr, raddr)
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}
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dialer := NewDialer()
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dialer.LocalAddr = laddr
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conn, err := dialer.Dial(network, raddr.String())
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if err != nil {
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return nil, fmt.Errorf("dialing TCP %s: %w", raddr.String(), err)
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}
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switch c := conn.(type) {
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case *net.TCPConn:
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// Advanced routing: plain connection
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return c, nil
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case *Conn:
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// Legacy routing: wrapped connection preserves close hooks
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tcpConn, ok := c.Conn.(*net.TCPConn)
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if !ok {
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if err := conn.Close(); err != nil {
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log.Errorf("Failed to close connection: %v", err)
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}
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return nil, fmt.Errorf("expected TCP connection, got %T", c.Conn)
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}
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return &TCPConn{TCPConn: tcpConn, ID: c.ID}, nil
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}
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if err := conn.Close(); err != nil {
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log.Errorf("failed to close connection: %v", err)
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}
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return nil, fmt.Errorf("unexpected connection type: %T", conn)
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}
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