mirror of
https://github.com/tailscale/tailscale.git
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777c816b34
Prefer the error from the actual wireguard-go device method call,
not {To,From}UAPI, as those tend to be less interesting I/O errors.
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
65 lines
1.3 KiB
Go
65 lines
1.3 KiB
Go
// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package wgcfg
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import (
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"io"
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"sort"
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"github.com/tailscale/wireguard-go/device"
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"tailscale.com/types/logger"
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)
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func DeviceConfig(d *device.Device) (*Config, error) {
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r, w := io.Pipe()
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errc := make(chan error, 1)
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go func() {
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errc <- d.IpcGetOperation(w)
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w.Close()
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}()
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cfg, err := FromUAPI(r)
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// Prefer errors from IpcGetOperation.
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if setErr := <-errc; setErr != nil {
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return nil, setErr
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}
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// Check FromUAPI error.
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if err != nil {
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return nil, err
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}
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sort.Slice(cfg.Peers, func(i, j int) bool {
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return cfg.Peers[i].PublicKey.LessThan(&cfg.Peers[j].PublicKey)
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})
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return cfg, nil
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}
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// ReconfigDevice replaces the existing device configuration with cfg.
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func ReconfigDevice(d *device.Device, cfg *Config, logf logger.Logf) (err error) {
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defer func() {
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if err != nil {
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logf("wgcfg.Reconfig failed: %v", err)
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}
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}()
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prev, err := DeviceConfig(d)
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if err != nil {
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return err
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}
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r, w := io.Pipe()
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errc := make(chan error, 1)
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go func() {
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errc <- d.IpcSetOperation(r)
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w.Close()
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}()
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err = cfg.ToUAPI(w, prev)
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w.Close()
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// Prefer errors from IpcSetOperation.
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if setErr := <-errc; setErr != nil {
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return setErr
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}
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return err // err (if any) from cfg.ToUAPI
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}
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