Implement 'vpn firewall list', and move 'nebula create-cert' to 'vpn create-cert'

go/cmd/entrypoint/main.go

@@ -38,10 +38,10 @@ var rootCmd = subCmd{
 			subCmdDaemon,
 			subCmdGarage,
 			subCmdHost,
-			subCmdNebula,
 			subCmdNetwork,
 			subCmdStorage,
 			subCmdVersion,
+			subCmdVPN,
 		)
 	},
 }

go/cmd/entrypoint/storage.go

@@ -197,7 +197,7 @@ var subCmdStorageAllocationRemove = subCmd{
 
 var subCmdStorage = subCmd{
 	name:  "storage",
-	descr: "Sub-commands having to do with configuration of storage on this host",
+	descr: "Sub-commands related to configuration of storage on this host",
 	do: func(ctx subCmdCtx) error {
 		return ctx.doSubCmd(
 			subCmdStorageAllocationAdd,

go/cmd/entrypoint/vpn.go

@@ -7,7 +7,7 @@ import (
 	"os"
 )
 
-var subCmdNebulaCreateCert = subCmd{
+var subCmdVPNCreateCert = subCmd{
 	name:  "create-cert",
 	descr: "Creates a signed nebula certificate file for an existing host and writes it to stdout",
 	do: func(ctx subCmdCtx) error {
@@ -63,12 +63,13 @@ var subCmdNebulaCreateCert = subCmd{
 	},
 }
 
-var subCmdNebula = subCmd{
+var subCmdVPN = subCmd{
-	name:  "nebula",
+	name:  "vpn",
-	descr: "Sub-commands related to the nebula VPN",
+	descr: "Sub-commands related to this host's VPN, which connects it to other hosts in the network",
 	do: func(ctx subCmdCtx) error {
 		return ctx.doSubCmd(
-			subCmdNebulaCreateCert,
+			subCmdVPNCreateCert,
+			subCmdVPNFirewall,
 		)
 	},
 }

go/cmd/entrypoint/vpn_firewall.go

@@ -0,0 +1,64 @@
+package main
+
+import (
+	"fmt"
+	"isle/daemon/daecommon"
+)
+
+type firewallRuleView struct {
+	Index                        int `yaml:"index"`
+	daecommon.ConfigFirewallRule `yaml:",inline"`
+}
+
+func newFirewallRuleViews(
+	rules []daecommon.ConfigFirewallRule,
+) []firewallRuleView {
+	views := make([]firewallRuleView, len(rules))
+	for i := range rules {
+		views[i] = firewallRuleView{
+			Index:              i,
+			ConfigFirewallRule: rules[i],
+		}
+	}
+	return views
+}
+
+type firewallView struct {
+	Outbound []firewallRuleView `yaml:"outbound"`
+	Inbound  []firewallRuleView `yaml:"inbound"`
+}
+
+func newFirewallView(firewallConfig daecommon.ConfigFirewall) firewallView {
+	return firewallView{
+		Outbound: newFirewallRuleViews(firewallConfig.Outbound),
+		Inbound:  newFirewallRuleViews(firewallConfig.Inbound),
+	}
+}
+
+var subCmdVPNFirewallList = subCmd{
+	name:  "list",
+	descr: "List all currently configured firewall rules",
+	do: doWithOutput(func(ctx subCmdCtx) (any, error) {
+		ctx, err := ctx.withParsedFlags()
+		if err != nil {
+			return nil, fmt.Errorf("parsing flags: %w", err)
+		}
+
+		config, err := ctx.getDaemonRPC().GetConfig(ctx)
+		if err != nil {
+			return nil, fmt.Errorf("getting network config: %w", err)
+		}
+
+		return newFirewallView(config.VPN.Firewall), nil
+	}),
+}
+
+var subCmdVPNFirewall = subCmd{
+	name:  "firewall",
+	descr: "Sub-commands related to this host's VPN firewall",
+	do: func(ctx subCmdCtx) error {
+		return ctx.doSubCmd(
+			subCmdVPNFirewallList,
+		)
+	},
+}

go/cmd/entrypoint/vpn_firewall_test.go

@@ -0,0 +1,108 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"isle/daemon/daecommon"
+	"isle/toolkit"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestVPNFirewallList(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		name              string
+		outbound, inbound []string
+		want              map[string][]any
+	}{
+		{
+			name: "empty",
+			want: map[string][]any{
+				"outbound": {},
+				"inbound":  {},
+			},
+		},
+		{
+			name: "single",
+			outbound: []string{
+				`{"port":"any","proto":"icmp","host":"any"}`,
+			},
+			want: map[string][]any{
+				"outbound": {
+					map[string]any{
+						"index": 0,
+						"port":  "any",
+						"proto": "icmp",
+						"host":  "any",
+					},
+				},
+				"inbound": {},
+			},
+		},
+		{
+			name: "multiple",
+			outbound: []string{
+				`{"port":"any","proto":"icmp","host":"any"}`,
+			},
+			inbound: []string{
+				`{"port":"any","proto":"icmp","host":"any"}`,
+				`{"port":"22","proto":"tcp","host":"foo"}`,
+			},
+			want: map[string][]any{
+				"outbound": {
+					map[string]any{
+						"index": 0,
+						"port":  "any",
+						"proto": "icmp",
+						"host":  "any",
+					},
+				},
+				"inbound": {
+					map[string]any{
+						"index": 0,
+						"port":  "any",
+						"proto": "icmp",
+						"host":  "any",
+					},
+					map[string]any{
+						"index": 1,
+						"port":  "22",
+						"proto": "tcp",
+						"host":  "foo",
+					},
+				},
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			var (
+				h      = newRunHarness(t)
+				config daecommon.NetworkConfig
+
+				outboundRawJSON = "[" + strings.Join(test.outbound, ",") + "]"
+				inboundRawJSON  = "[" + strings.Join(test.inbound, ",") + "]"
+			)
+
+			require.NoError(t, json.Unmarshal(
+				[]byte(outboundRawJSON), &config.VPN.Firewall.Outbound,
+			))
+
+			require.NoError(t, json.Unmarshal(
+				[]byte(inboundRawJSON), &config.VPN.Firewall.Inbound,
+			))
+
+			h.daemonRPC.
+				On("GetConfig", toolkit.MockArg[context.Context]()).
+				Return(config, nil).
+				Once()
+
+			h.runAssertStdout(t, test.want, "vpn", "firewall", "list")
+		})
+	}
+}