129 lines
3.7 KiB
Go
129 lines
3.7 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
|
|
// SPDX-License-Identifier: BSD-3-Clause
|
|
|
|
//go:build go1.19
|
|
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"path/filepath"
|
|
|
|
"tailscale.com/ipn/ipnlocal"
|
|
"tailscale.com/types/logger"
|
|
"tailscale.com/version/distro"
|
|
)
|
|
|
|
func configureTaildrop(logf logger.Logf, lb *ipnlocal.LocalBackend) {
|
|
dg := distro.Get()
|
|
switch dg {
|
|
case distro.Synology, distro.TrueNAS, distro.QNAP, distro.Unraid:
|
|
// See if they have a "Taildrop" share.
|
|
// See https://github.com/tailscale/tailscale/issues/2179#issuecomment-982821319
|
|
path, err := findTaildropDir(dg)
|
|
if err != nil {
|
|
logf("%s Taildrop support: %v", dg, err)
|
|
} else {
|
|
logf("%s Taildrop: using %v", dg, path)
|
|
lb.SetDirectFileRoot(path)
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
func findTaildropDir(dg distro.Distro) (string, error) {
|
|
const name = "Taildrop"
|
|
switch dg {
|
|
case distro.Synology:
|
|
return findSynologyTaildropDir(name)
|
|
case distro.TrueNAS:
|
|
return findTrueNASTaildropDir(name)
|
|
case distro.QNAP:
|
|
return findQnapTaildropDir(name)
|
|
case distro.Unraid:
|
|
return findUnraidTaildropDir(name)
|
|
}
|
|
return "", fmt.Errorf("%s is an unsupported distro for Taildrop dir", dg)
|
|
}
|
|
|
|
// findSynologyTaildropDir looks for the first volume containing a
|
|
// "Taildrop" directory. We'd run "synoshare --get Taildrop" command
|
|
// but on DSM7 at least, we lack permissions to run that.
|
|
func findSynologyTaildropDir(name string) (dir string, err error) {
|
|
for i := 1; i <= 16; i++ {
|
|
dir = fmt.Sprintf("/volume%v/%s", i, name)
|
|
if fi, err := os.Stat(dir); err == nil && fi.IsDir() {
|
|
return dir, nil
|
|
}
|
|
}
|
|
return "", fmt.Errorf("shared folder %q not found", name)
|
|
}
|
|
|
|
// findTrueNASTaildropDir returns the first matching directory of
|
|
// /mnt/{name} or /mnt/*/{name}
|
|
func findTrueNASTaildropDir(name string) (dir string, err error) {
|
|
// If we're running in a jail, a mount point could just be added at /mnt/Taildrop
|
|
dir = fmt.Sprintf("/mnt/%s", name)
|
|
if fi, err := os.Stat(dir); err == nil && fi.IsDir() {
|
|
return dir, nil
|
|
}
|
|
|
|
// but if running on the host, it may be something like /mnt/Primary/Taildrop
|
|
fis, err := os.ReadDir("/mnt")
|
|
if err != nil {
|
|
return "", fmt.Errorf("error reading /mnt: %w", err)
|
|
}
|
|
for _, fi := range fis {
|
|
dir = fmt.Sprintf("/mnt/%s/%s", fi.Name(), name)
|
|
if fi, err := os.Stat(dir); err == nil && fi.IsDir() {
|
|
return dir, nil
|
|
}
|
|
}
|
|
return "", fmt.Errorf("shared folder %q not found", name)
|
|
}
|
|
|
|
// findQnapTaildropDir checks if a Shared Folder named "Taildrop" exists.
|
|
func findQnapTaildropDir(name string) (string, error) {
|
|
dir := fmt.Sprintf("/share/%s", name)
|
|
fi, err := os.Stat(dir)
|
|
if err != nil {
|
|
return "", fmt.Errorf("shared folder %q not found", name)
|
|
}
|
|
if fi.IsDir() {
|
|
return dir, nil
|
|
}
|
|
|
|
// share/Taildrop is usually a symlink to CACHEDEV1_DATA/Taildrop/ or some such.
|
|
fullpath, err := filepath.EvalSymlinks(dir)
|
|
if err != nil {
|
|
return "", fmt.Errorf("symlink to shared folder %q not found", name)
|
|
}
|
|
if fi, err = os.Stat(fullpath); err == nil && fi.IsDir() {
|
|
return dir, nil // return the symlink, how QNAP set it up
|
|
}
|
|
return "", fmt.Errorf("shared folder %q not found", name)
|
|
}
|
|
|
|
// findUnraidTaildropDir looks for a directory linked at
|
|
// /var/lib/tailscale/Taildrop. This is a symlink to the
|
|
// path specified by the user in the Unraid Web UI
|
|
func findUnraidTaildropDir(name string) (string, error) {
|
|
dir := fmt.Sprintf("/var/lib/tailscale/%s", name)
|
|
_, err := os.Stat(dir)
|
|
if err != nil {
|
|
return "", fmt.Errorf("symlink %q not found", name)
|
|
}
|
|
|
|
fullpath, err := filepath.EvalSymlinks(dir)
|
|
if err != nil {
|
|
return "", fmt.Errorf("symlink %q to shared folder not valid", name)
|
|
}
|
|
|
|
fi, err := os.Stat(fullpath)
|
|
if err == nil && fi.IsDir() {
|
|
return dir, nil // return the symlink
|
|
}
|
|
return "", fmt.Errorf("shared folder %q not found", name)
|
|
}
|