mirror of
https://github.com/Control-D-Inc/ctrld.git
synced 2026-02-03 22:18:39 +00:00
4c2d21a8f8
This commit add support for ctrld to run on freebsd, supported platforms are amd64/arm64/armv6/armv7,386. Supporting freebsd also requires adding debian and openresolv resolvconf. Updates #47
127 lines
3.3 KiB
Go
127 lines
3.3 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 dns
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import (
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"bufio"
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"fmt"
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"net/netip"
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"tailscale.com/types/logger"
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"tailscale.com/util/dnsname"
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)
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var _ OSConfigurator = (*directManager)(nil)
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// An OSConfigurator applies DNS settings to the operating system.
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type OSConfigurator interface {
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// SetDNS updates the OS's DNS configuration to match cfg.
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// If cfg is the zero value, all ctrld-related DNS
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// configuration is removed.
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// SetDNS must not be called after Close.
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// SetDNS takes ownership of cfg.
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SetDNS(cfg OSConfig) error
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// Close removes ctrld-related DNS configuration from the OS.
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Close() error
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Mode() string
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}
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// HostEntry represents a single line in the OS's hosts file.
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type HostEntry struct {
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Addr netip.Addr
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Hosts []string
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}
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// OSConfig is an OS DNS configuration.
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type OSConfig struct {
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// Hosts is a map of DNS FQDNs to their IPs, which should be added to the
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// OS's hosts file. Currently, (2022-08-12) it is only populated for Windows
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// in SplitDNS mode and with Smart Name Resolution turned on.
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Hosts []*HostEntry
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// Nameservers are the IP addresses of the nameservers to use.
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Nameservers []netip.Addr
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// SearchDomains are the domain suffixes to use when expanding
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// single-label name queries. SearchDomains is additive to
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// whatever non-Tailscale search domains the OS has.
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SearchDomains []dnsname.FQDN
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// MatchDomains are the DNS suffixes for which Nameservers should
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// be used. If empty, Nameservers is installed as the "primary" resolver.
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MatchDomains []dnsname.FQDN
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}
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func (o OSConfig) IsZero() bool {
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return len(o.Nameservers) == 0 && len(o.SearchDomains) == 0 && len(o.MatchDomains) == 0
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}
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func (a OSConfig) Equal(b OSConfig) bool {
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if len(a.Nameservers) != len(b.Nameservers) {
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return false
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}
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if len(a.SearchDomains) != len(b.SearchDomains) {
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return false
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}
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if len(a.MatchDomains) != len(b.MatchDomains) {
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return false
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}
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for i := range a.Nameservers {
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if a.Nameservers[i] != b.Nameservers[i] {
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return false
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}
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}
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for i := range a.SearchDomains {
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if a.SearchDomains[i] != b.SearchDomains[i] {
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return false
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}
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}
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for i := range a.MatchDomains {
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if a.MatchDomains[i] != b.MatchDomains[i] {
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return false
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}
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}
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return true
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}
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// Format implements the fmt.Formatter interface to ensure that Hosts is
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// printed correctly (i.e. not as a bunch of pointers).
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//
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// Fixes https://github.com/tailscale/tailscale/issues/5669
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func (a OSConfig) Format(f fmt.State, verb rune) {
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logger.ArgWriter(func(w *bufio.Writer) {
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_, _ = w.WriteString(`{Nameservers:[`)
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for i, ns := range a.Nameservers {
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if i != 0 {
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_, _ = w.WriteString(" ")
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}
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_, _ = fmt.Fprintf(w, "%+v", ns)
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}
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_, _ = w.WriteString(`] SearchDomains:[`)
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for i, domain := range a.SearchDomains {
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if i != 0 {
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_, _ = w.WriteString(" ")
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}
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_, _ = fmt.Fprintf(w, "%+v", domain)
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}
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_, _ = w.WriteString(`] MatchDomains:[`)
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for i, domain := range a.MatchDomains {
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if i != 0 {
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_, _ = w.WriteString(" ")
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}
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_, _ = fmt.Fprintf(w, "%+v", domain)
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}
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_, _ = w.WriteString(`] Hosts:[`)
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for i, host := range a.Hosts {
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if i != 0 {
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_, _ = w.WriteString(" ")
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}
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_, _ = fmt.Fprintf(w, "%+v", host)
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}
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_, _ = w.WriteString(`]}`)
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}).Format(f, verb)
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}
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