Make auto updating optional

mtglib/internal/dc/init.go

@@ -57,6 +57,9 @@ var defaultDCAddrSet = dcAddrSet{
 		5: {
 			{Network: "tcp4", Address: "149.154.171.5:443"},
 		},
+		203: {
+			{Network: "tcp4", Address: "91.105.192.100:443"},
+		},
 	},
 	v6: map[int][]Addr{
 		1: {
@@ -74,5 +77,8 @@ var defaultDCAddrSet = dcAddrSet{
 		5: {
 			{Network: "tcp6", Address: "[2001:b28:f23f:f005::a]:443"},
 		},
+		203: {
+			{Network: "tcp6", Address: "[2a0a:f280:0203:000a:5000:0000:0000:0100]:443"},
+		},
 	},
 }

mtglib/internal/dc/view_test.go

@@ -41,6 +41,7 @@ func (suite *ViewTestSuite) TestGetV4() {
 		},
 		203: {
 			{Network: "tcp4", Address: "127.0.0.2:443"},
+			{Network: "tcp4", Address: "91.105.192.100:443"},
 		},
 		2: {
 			{Network: "tcp4", Address: "149.154.167.51:443"},
@@ -60,6 +61,7 @@ func (suite *ViewTestSuite) TestGetV6() {
 		111: {},
 		203: {
 			{Network: "tcp6", Address: "xxx"},
+			{Network: "tcp6", Address: "[2a0a:f280:0203:000a:5000:0000:0000:0100]:443"},
 		},
 		1: {
 			{Network: "tcp6", Address: "[2001:b28:f23d:f001::a]:443"},

mtglib/proxy.go

@@ -346,8 +346,10 @@ func NewProxy(opts ProxyOpts) (*Proxy, error) {
 		domainFrontingProxyProtocol: opts.DomainFrontingProxyProtocol,
 	}
 
-	proxy.configUpdater.Run(ctx, dc.PublicConfigUpdateURLv4, "tcp4")
-	proxy.configUpdater.Run(ctx, dc.PublicConfigUpdateURLv6, "tcp6")
+	if opts.AutoUpdate {
+		proxy.configUpdater.Run(ctx, dc.PublicConfigUpdateURLv4, "tcp4")
+		proxy.configUpdater.Run(ctx, dc.PublicConfigUpdateURLv6, "tcp6")
+	}
 
 	pool, err := ants.NewPoolWithFunc(opts.getConcurrency(),
 		func(arg any) {

mtglib/proxy_opts.go

@@ -85,6 +85,12 @@ type ProxyOpts struct {
 	// This is an optional setting.
 	PreferIP string
 
+	// AutoUpdate defines if it is required to auto update proxy list from
+	// Telegram instead of relying on a hardcoded list.
+	//
+	// This is an optional setting.
+	AutoUpdate bool
+
 	// DomainFrontingPort is a port we use to connect to a fronting domain.
 	//
 	// This is required because secret does not specify a port. It specifies a