Method lostPeer

tailnet/coordinator.go:462–474

removePeer removes and cleans up a lost peer. It updates all peers it shares a tunnel with, deletes all tunnels from which the removed peer is the source.

(p *peer, closeErr string)

// removePeer removes and cleans up a lost peer.  It updates all peers it shares a tunnel with, deletes
// all tunnels from which the removed peer is the source.
func (c *core) lostPeer(p *peer, closeErr string) error {
	c.mutex.Lock()
	defer c.mutex.Unlock()
	c.logger.Debug(context.Background(), "lostPeer", slog.F("peer_id", p.id))
	if c.closed {
		return ErrClosed
	}
	if existing, ok := c.peers[p.id]; !ok || existing != p {
		return ErrAlreadyRemoved
	}
	c.removePeerLocked(p.id, proto.CoordinateResponse_PeerUpdate_LOST, "lost", closeErr)
	return nil
}

func (c *core) removePeerLocked(id uuid.UUID, kind proto.CoordinateResponse_PeerUpdate_Kind, reason, closeErr string) {
	p, ok := c.peers[id]