add support for custom p2p node listen maddrs and dht announce maddrs (#799)

Author: mintyleaf

cmd/util.go

@@ -45,6 +45,16 @@ var CommonFlags []cli.Flag = []cli.Flag{
 		Usage:   "Specify a path to a edgevpn config file",
 		EnvVars: []string{"EDGEVPNCONFIG"},
 	},
+	&cli.StringSliceFlag{
+		Name:    "listen-maddrs",
+		Usage:   "Override default 0.0.0.0 listen multiaddresses",
+		EnvVars: []string{"EDGEVPNLISTENMADDRS"},
+	},
+	&cli.StringSliceFlag{
+		Name:    "dht-announce-maddrs",
+		Usage:   "Override listen-maddrs on DHT announce",
+		EnvVars: []string{"EDGEVPNDHTANNOUNCEMADDRS"},
+	},
 	&cli.StringFlag{
 		Name:    "timeout",
 		Usage:   "Specify a default timeout for connection stream",
@@ -407,6 +417,8 @@ func ConfigFromContext(c *cli.Context) *config.Config {
 	return &config.Config{
 		NetworkConfig:     c.String("config"),
 		NetworkToken:      c.String("token"),
+		ListenMaddrs:      (c.StringSlice("listen-maddrs")),
+		DHTAnnounceMaddrs: stringsToMultiAddr(c.StringSlice("dht-announce-maddrs")),
 		Address:           c.String("address"),
 		Router:            c.String("router"),
 		Interface:         c.String("interface"),

pkg/config/config.go

@@ -47,6 +47,8 @@ import (
 type Config struct {
 	NetworkConfig, NetworkToken                string
 	Address                                    string
+	ListenMaddrs                               []string
+	DHTAnnounceMaddrs                          []multiaddr.Multiaddr
 	Router                                     string
 	Interface                                  string
 	Libp2pLogLevel, LogLevel                   string
@@ -204,10 +206,20 @@ func (c Config) ToOpts(l *logger.Logger) ([]node.Option, []vpn.Option, error) {
 	if c.LowProfile {
 		dhtOpts = append(dhtOpts, dht.BucketSize(20))
 	}
+	if len(c.DHTAnnounceMaddrs) > 0 {
+		dhtOpts = append(dhtOpts, dht.AddressFilter(
+			func(m []multiaddr.Multiaddr) []multiaddr.Multiaddr {
+				return c.DHTAnnounceMaddrs
+			},
+		),
+		)
+	}
+
 	d := discovery.NewDHT(dhtOpts...)
 	m := &discovery.MDNS{}
 
 	opts := []node.Option{
+		node.ListenAddresses(c.ListenMaddrs...),
 		node.WithDiscoveryInterval(c.Discovery.Interval),
 		node.WithLedgerAnnounceTime(c.Ledger.AnnounceInterval),
 		node.WithLedgerInterval(c.Ledger.SyncInterval),