Maint: firewall and routing use logger.Debug

- Remove SetVerbose and SetDebug from both
- Log routing teardown
- Default logging level set to info

internal/firewall/firewall.go

@@ -15,13 +15,11 @@ import (
 
 // Configurator allows to change firewall rules and modify network routes.
 type Configurator interface {
-	Version(ctx context.Context) (string, error)
 	SetEnabled(ctx context.Context, enabled bool) (err error)
 	SetVPNConnection(ctx context.Context, connection models.OpenVPNConnection) (err error)
 	SetAllowedPort(ctx context.Context, port uint16, intf string) (err error)
 	SetOutboundSubnets(ctx context.Context, subnets []net.IPNet) (err error)
 	RemoveAllowedPort(ctx context.Context, port uint16) (err error)
-	SetDebug()
 	// SetNetworkInformation is meant to be called only once
 	SetNetworkInformation(defaultInterface string, defaultGateway net.IP,
 		localNetworks []routing.LocalNetwork, localIP net.IP)
@@ -33,7 +31,6 @@ type configurator struct { //nolint:maligned
 	routing          routing.Routing
 	iptablesMutex    sync.Mutex
 	ip6tablesMutex   sync.Mutex
-	debug            bool
 	defaultInterface string
 	defaultGateway   net.IP
 	localNetworks    []routing.LocalNetwork
@@ -65,10 +62,6 @@ func NewConfigurator(logger logging.Logger, routing routing.Routing) Configurato
 	}
 }
 
-func (c *configurator) SetDebug() {
-	c.debug = true
-}
-
 func (c *configurator) SetNetworkInformation(
 	defaultInterface string, defaultGateway net.IP, localNetworks []routing.LocalNetwork, localIP net.IP) {
 	c.networkInfoMutex.Lock()

internal/firewall/ip6tables.go

@@ -38,9 +38,9 @@ func (c *configurator) runIP6tablesInstruction(ctx context.Context, instruction
 	}
 	c.ip6tablesMutex.Lock() // only one ip6tables command at once
 	defer c.ip6tablesMutex.Unlock()
-	if c.debug {
-		fmt.Println("ip6tables " + instruction)
-	}
+
+	c.logger.Debug("ip6tables " + instruction)
+
 	flags := strings.Fields(instruction)
 	cmd := exec.CommandContext(ctx, "ip6tables", flags...)
 	if output, err := c.commander.Run(cmd); err != nil {

internal/firewall/iptables.go

@@ -11,6 +11,7 @@ import (
 	"strings"
 
 	"github.com/qdm12/gluetun/internal/models"
+	"github.com/qdm12/golibs/command"
 )
 
 var (
@@ -46,9 +47,9 @@ func flipRule(rule string) string {
 }
 
 // Version obtains the version of the installed iptables.
-func (c *configurator) Version(ctx context.Context) (string, error) {
+func Version(ctx context.Context, commander command.Commander) (string, error) {
 	cmd := exec.CommandContext(ctx, "iptables", "--version")
-	output, err := c.commander.Run(cmd)
+	output, err := commander.Run(cmd)
 	if err != nil {
 		return "", err
 	}
@@ -72,9 +73,9 @@ func (c *configurator) runIptablesInstructions(ctx context.Context, instructions
 func (c *configurator) runIptablesInstruction(ctx context.Context, instruction string) error {
 	c.iptablesMutex.Lock() // only one iptables command at once
 	defer c.iptablesMutex.Unlock()
-	if c.debug {
-		fmt.Printf("iptables %s\n", instruction)
-	}
+
+	c.logger.Debug("iptables " + instruction)
+
 	flags := strings.Fields(instruction)
 	cmd := exec.CommandContext(ctx, "iptables", flags...)
 	if output, err := c.commander.Run(cmd); err != nil {