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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
*/
package wgcfg
import (
"fmt"
"net"
"strings"
)
func (conf *Config) ToUAPI() (string, error) {
output := new(strings.Builder)
fmt.Fprintf(output, "private_key=%s\n", conf.PrivateKey.HexString())
if conf.ListenPort > 0 {
fmt.Fprintf(output, "listen_port=%d\n", conf.ListenPort)
}
output.WriteString("replace_peers=true\n")
for _, peer := range conf.Peers {
fmt.Fprintf(output, "public_key=%s\n", peer.PublicKey.HexString())
fmt.Fprintf(output, "protocol_version=1\n")
fmt.Fprintf(output, "replace_allowed_ips=true\n")
if !peer.PresharedKey.IsZero() {
fmt.Fprintf(output, "preshared_key = %s\n", peer.PresharedKey.String())
}
if len(peer.AllowedIPs) > 0 {
for _, address := range peer.AllowedIPs {
fmt.Fprintf(output, "allowed_ip=%s\n", address.String())
}
}
if len(peer.Endpoints) > 0 {
var reps []string
for _, ep := range peer.Endpoints {
ips, err := net.LookupIP(ep.Host)
if err != nil {
return "", err
}
var ip net.IP
for _, iterip := range ips {
if ip4 := iterip.To4(); ip4 != nil {
ip = ip4
break
}
if ip == nil {
ip = iterip
}
}
if ip == nil {
return "", fmt.Errorf("unable to resolve IP address of endpoint %q (%v)", ep.Host, ips)
}
resolvedEndpoint := Endpoint{ip.String(), ep.Port}
reps = append(reps, resolvedEndpoint.String())
}
fmt.Fprintf(output, "endpoint=%s\n", strings.Join(reps, ","))
} else {
fmt.Fprint(output, "endpoint=\n")
}
// Note: this needs to come *after* endpoint definitions,
// because setting it will trigger a handshake to all
// already-defined endpoints.
fmt.Fprintf(output, "persistent_keepalive_interval=%d\n", peer.PersistentKeepalive)
}
return output.String(), nil
}
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