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dfnet.go
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dfnet.go
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/*
* Copyright 2020 The Dragonfly Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package dfnet
import (
"encoding/json"
"errors"
"fmt"
"gopkg.in/yaml.v3"
)
type NetworkType string
const (
// TCP represents protocol of tcp.
TCP NetworkType = "tcp"
// TCP represents protocol of unix.
UNIX NetworkType = "unix"
// TCP represents protocol of vsock.
VSOCK NetworkType = "vsock"
)
// NetAddr is the definition structure of grpc address,
// refer to https://github.com/grpc/grpc/blob/master/doc/naming.md.
type NetAddr struct {
// Type is the type of network.
Type NetworkType `mapstructure:"type" yaml:"type"`
// Addr is the address of network.
Addr string `mapstructure:"addr" yaml:"addr"`
}
// String returns the endpoint of network address.
func (n *NetAddr) String() string {
switch n.Type {
case UNIX:
return fmt.Sprintf("unix://%s", n.Addr)
case VSOCK:
return fmt.Sprintf("vsock://%s", n.Addr)
default:
return fmt.Sprintf("dns:///%s", n.Addr)
}
}
// UnmarshalJSON parses the JSON-encoded data and stores the result in NetAddr.
func (n *NetAddr) UnmarshalJSON(b []byte) error {
var v any
if err := json.Unmarshal(b, &v); err != nil {
return err
}
switch value := v.(type) {
case string:
n.Type = TCP
n.Addr = value
return nil
case map[string]any:
if err := n.unmarshal(json.Unmarshal, b); err != nil {
return err
}
return nil
default:
return errors.New("invalid net addr")
}
}
// UnmarshalYAML parses the YAML-encoded data and stores the result in NetAddr.
func (n *NetAddr) UnmarshalYAML(node *yaml.Node) error {
switch node.Kind {
case yaml.ScalarNode:
var addr string
if err := node.Decode(&addr); err != nil {
return err
}
n.Type = TCP
n.Addr = addr
return nil
case yaml.MappingNode:
var m = make(map[string]any)
for i := 0; i < len(node.Content); i += 2 {
var (
key string
value any
)
if err := node.Content[i].Decode(&key); err != nil {
return err
}
if err := node.Content[i+1].Decode(&value); err != nil {
return err
}
m[key] = value
}
b, err := yaml.Marshal(m)
if err != nil {
return err
}
if err := n.unmarshal(yaml.Unmarshal, b); err != nil {
return err
}
return nil
default:
return errors.New("invalid net addr")
}
}
// unmarshal parses the encoded data and stores the result.
func (n *NetAddr) unmarshal(unmarshal func(in []byte, out any) (err error), b []byte) error {
netAddr := struct {
Type NetworkType `json:"type" yaml:"type"`
Addr string `json:"addr" yaml:"addr"`
}{}
if err := unmarshal(b, &netAddr); err != nil {
return err
}
n.Type = netAddr.Type
n.Addr = netAddr.Addr
return nil
}