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// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"context"
"errors"
"fmt"
"log"
"strings"
"tailscale.com/derp"
"tailscale.com/derp/derphttp"
"tailscale.com/types/key"
"tailscale.com/types/logger"
)
func startMesh(s *derp.Server) error {
if *meshWith == "" {
return nil
}
if !s.HasMeshKey() {
return errors.New("--mesh-with requires --mesh-psk-file")
}
for _, host := range strings.Split(*meshWith, ",") {
if err := startMeshWithHost(s, host); err != nil {
return err
}
}
return nil
}
func startMeshWithHost(s *derp.Server, host string) error {
logf := logger.WithPrefix(log.Printf, fmt.Sprintf("mesh(%q): ", host))
c, err := derphttp.NewClient(s.PrivateKey(), "https://"+host+"/derp", logf)
if err != nil {
return err
}
c.MeshKey = s.MeshKey()
add := func(k key.Public) { s.AddPacketForwarder(k, c) }
remove := func(k key.Public) { s.RemovePacketForwarder(k, c) }
go c.RunWatchConnectionLoop(context.Background(), s.PublicKey(), logf, add, remove)
return nil
}
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