all: add freebsd supports

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

cmd/ctrld/cli.go

@@ -197,8 +197,7 @@ func initCLI() {
 			setDependencies(sc)
 			sc.Arguments = append([]string{"run"}, osArgs...)
 			if dir, err := os.UserHomeDir(); err == nil {
-				// WorkingDirectory is not supported on Windows.
-				sc.WorkingDirectory = dir
+				setWorkingDirectory(sc, dir)
 				// No config path, generating config in HOME directory.
 				noConfigStart := isNoConfigStart(cmd)
 				writeDefaultConfig := !noConfigStart && configBase64 == ""

cmd/ctrld/network_manager_linux.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"os"
 	"path/filepath"
-	"runtime"
 	"time"
 
 	"github.com/coreos/go-systemd/v22/dbus"
@@ -24,10 +23,6 @@ systemd-resolved=false
 var networkManagerCtrldConfFile = filepath.Join(nmConfDir, nmCtrldConfFilename)
 
 func setupNetworkManager() error {
-	if runtime.GOOS != "linux" {
-		mainLog.Debug().Msg("skipping NetworkManager setup, not on Linux")
-		return nil
-	}
 	if content, _ := os.ReadFile(nmCtrldConfContent); string(content) == nmCtrldConfContent {
 		mainLog.Debug().Msg("NetworkManager already setup, nothing to do")
 		return nil
@@ -48,10 +43,6 @@ func setupNetworkManager() error {
 }
 
 func restoreNetworkManager() error {
-	if runtime.GOOS != "linux" {
-		mainLog.Debug().Msg("skipping NetworkManager restoring, not on Linux")
-		return nil
-	}
 	err := os.Remove(networkManagerCtrldConfFile)
 	if os.IsNotExist(err) {
 		mainLog.Debug().Msg("NetworkManager is not available")

cmd/ctrld/network_manager_others.go

@@ -0,0 +1,13 @@
+//go:build !linux
+
+package main
+
+func setupNetworkManager() error {
+	return nil
+}
+
+func restoreNetworkManager() error {
+	return nil
+}
+
+func reloadNetworkManager() {}

cmd/ctrld/os_darwin.go

@@ -1,6 +1,3 @@
-//go:build darwin
-// +build darwin
-
 package main
 
 import (

cmd/ctrld/os_freebsd.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"net"
+	"net/netip"
+
+	"github.com/Control-D-Inc/ctrld/internal/dns"
+	"github.com/Control-D-Inc/ctrld/internal/resolvconffile"
+)
+
+// set the dns server for the provided network interface
+func setDNS(iface *net.Interface, nameservers []string) error {
+	r, err := dns.NewOSConfigurator(logf, iface.Name)
+	if err != nil {
+		mainLog.Error().Err(err).Msg("failed to create DNS OS configurator")
+		return err
+	}
+
+	ns := make([]netip.Addr, 0, len(nameservers))
+	for _, nameserver := range nameservers {
+		ns = append(ns, netip.MustParseAddr(nameserver))
+	}
+
+	if err := r.SetDNS(dns.OSConfig{Nameservers: ns}); err != nil {
+		mainLog.Error().Err(err).Msg("failed to set DNS")
+		return err
+	}
+	return nil
+}
+
+func resetDNS(iface *net.Interface) error {
+	r, err := dns.NewOSConfigurator(logf, iface.Name)
+	if err != nil {
+		mainLog.Error().Err(err).Msg("failed to create DNS OS configurator")
+		return err
+	}
+
+	if err := r.Close(); err != nil {
+		mainLog.Error().Err(err).Msg("failed to rollback DNS setting")
+		return err
+	}
+	return nil
+}
+
+func currentDNS(_ *net.Interface) []string {
+	return resolvconffile.NameServers("")
+}

cmd/ctrld/os_others.go

@@ -0,0 +1,13 @@
+//go:build !linux && !darwin
+
+package main
+
+// TODO(cuonglm): implement.
+func allocateIP(ip string) error {
+	return nil
+}
+
+// TODO(cuonglm): implement.
+func deAllocateIP(ip string) error {
+	return nil
+}

cmd/ctrld/os_windows.go

@@ -1,6 +1,3 @@
-//go:build windows
-// +build windows
-
 package main
 
 import (
@@ -14,16 +11,6 @@ import (
 	ctrldnet "github.com/Control-D-Inc/ctrld/internal/net"
 )
 
-// TODO(cuonglm): implement.
-func allocateIP(ip string) error {
-	return nil
-}
-
-// TODO(cuonglm): implement.
-func deAllocateIP(ip string) error {
-	return nil
-}
-
 func setDNS(iface *net.Interface, nameservers []string) error {
 	if len(nameservers) == 0 {
 		return errors.New("empty DNS nameservers")

cmd/ctrld/prog_freebsd.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"os"
+
+	"github.com/kardianos/service"
+)
+
+func (p *prog) preRun() {
+	if !service.Interactive() {
+		p.setDNS()
+	}
+}
+
+func setDependencies(svc *service.Config) {
+	// TODO(cuonglm): remove once https://github.com/kardianos/service/issues/359 fixed.
+	_ = os.MkdirAll("/usr/local/etc/rc.d", 0755)
+}
+
+func setWorkingDirectory(svc *service.Config, dir string) {}

cmd/ctrld/prog_linux.go

@@ -18,3 +18,7 @@ func setDependencies(svc *service.Config) {
 		"After=NetworkManager-wait-online.service",
 	}
 }
+
+func setWorkingDirectory(svc *service.Config, dir string) {
+	svc.WorkingDirectory = dir
+}

cmd/ctrld/prog_others.go

@@ -1,5 +1,4 @@
-//go:build !linux
-// +build !linux
+//go:build !linux && !freebsd
 
 package main
 
@@ -8,3 +7,8 @@ import "github.com/kardianos/service"
 func (p *prog) preRun() {}
 
 func setDependencies(svc *service.Config) {}
+
+func setWorkingDirectory(svc *service.Config, dir string) {
+	// WorkingDirectory is not supported on Windows.
+	svc.WorkingDirectory = dir
+}