1 files changed, 78 insertions, 0 deletions
diff --git a/wgcfg/config.go b/wgcfg/config.go
new file mode 100644
index 0000000..2b5e714
--- /dev/null
+++ b/wgcfg/config.go
@@ -0,0 +1,78 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
+ */
+
+// Package wgcfg has types and a parser for representing WireGuard config.
+package wgcfg
+
+import (
+	"fmt"
+	"strings"
+)
+
+// Config is a wireguard configuration.
+type Config struct {
+	Name       string
+	PrivateKey PrivateKey
+	Addresses  []CIDR
+	ListenPort uint16
+	MTU        uint16
+	DNS        []IP
+	Peers      []Peer
+}
+
+type Peer struct {
+	PublicKey           Key
+	PresharedKey        SymmetricKey
+	AllowedIPs          []CIDR
+	Endpoints           []Endpoint
+	PersistentKeepalive uint16
+}
+
+type Endpoint struct {
+	Host string
+	Port uint16
+}
+
+func (e *Endpoint) String() string {
+	if strings.IndexByte(e.Host, ':') > 0 {
+		return fmt.Sprintf("[%s]:%d", e.Host, e.Port)
+	}
+	return fmt.Sprintf("%s:%d", e.Host, e.Port)
+}
+
+func (e *Endpoint) IsEmpty() bool {
+	return len(e.Host) == 0
+}
+
+// Copy makes a deep copy of Config.
+// The result aliases no memory with the original.
+func (cfg Config) Copy() Config {
+	res := cfg
+	if res.Addresses != nil {
+		res.Addresses = append([]CIDR{}, res.Addresses...)
+	}
+	if res.DNS != nil {
+		res.DNS = append([]IP{}, res.DNS...)
+	}
+	peers := make([]Peer, 0, len(res.Peers))
+	for _, peer := range res.Peers {
+		peers = append(peers, peer.Copy())
+	}
+	res.Peers = peers
+	return res
+}
+
+// Copy makes a deep copy of Peer.
+// The result aliases no memory with the original.
+func (peer Peer) Copy() Peer {
+	res := peer
+	if res.AllowedIPs != nil {
+		res.AllowedIPs = append([]CIDR{}, res.AllowedIPs...)
+	}
+	if res.Endpoints != nil {
+		res.Endpoints = append([]Endpoint{}, res.Endpoints...)
+	}
+	return res
+}