cmd: allow import/running ctrld as library

cmd/cli/os_freebsd.go

@@ -0,0 +1,68 @@
+package cli
+
+import (
+	"net"
+	"net/netip"
+	"os/exec"
+
+	"github.com/Control-D-Inc/ctrld/internal/dns"
+	"github.com/Control-D-Inc/ctrld/internal/resolvconffile"
+)
+
+// allocate loopback ip
+// sudo ifconfig lo0 127.0.0.53 alias
+func allocateIP(ip string) error {
+	cmd := exec.Command("ifconfig", "lo0", ip, "alias")
+	if err := cmd.Run(); err != nil {
+		mainLog.Load().Error().Err(err).Msg("allocateIP failed")
+		return err
+	}
+	return nil
+}
+
+func deAllocateIP(ip string) error {
+	cmd := exec.Command("ifconfig", "lo0", ip, "-alias")
+	if err := cmd.Run(); err != nil {
+		mainLog.Load().Error().Err(err).Msg("deAllocateIP failed")
+		return err
+	}
+	return nil
+}
+
+// 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.Load().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.Load().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.Load().Error().Err(err).Msg("failed to create DNS OS configurator")
+		return err
+	}
+
+	if err := r.Close(); err != nil {
+		mainLog.Load().Error().Err(err).Msg("failed to rollback DNS setting")
+		return err
+	}
+	return nil
+}
+
+func currentDNS(_ *net.Interface) []string {
+	return resolvconffile.NameServers("")
+}