New global discovery protocol over HTTPS (fixes #628, fixes #1907)

lib/discover/localpackets.go

@@ -0,0 +1,37 @@
+// Copyright (C) 2014 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+//go:generate -command genxdr go run ../../Godeps/_workspace/src/github.com/calmh/xdr/cmd/genxdr/main.go
+//go:generate genxdr -o localpackets_xdr.go localpackets.go
+
+package discover
+
+const (
+	AnnouncementMagic = 0x9D79BC40
+	QueryMagic        = 0x2CA856F6
+)
+
+type Query struct {
+	Magic    uint32
+	DeviceID []byte // max:32
+}
+
+type Announce struct {
+	Magic uint32
+	This  Device
+	Extra []Device // max:16
+}
+
+type Relay struct {
+	URL     string `json:"url"` // max:2083
+	Latency int32  `json:"latency"`
+}
+
+type Device struct {
+	ID        []byte   // max:32
+	Addresses []string // max:16
+	Relays    []Relay  // max:16
+}