massive refactoring against json config parsing

proxy/socks/config_json.go

@@ -0,0 +1,64 @@
+// +build json
+
+package socks
+
+import (
+	"encoding/json"
+
+	"github.com/v2ray/v2ray-core/common/log"
+	v2net "github.com/v2ray/v2ray-core/common/net"
+	v2netjson "github.com/v2ray/v2ray-core/common/net/json"
+	"github.com/v2ray/v2ray-core/proxy/internal"
+	"github.com/v2ray/v2ray-core/proxy/internal/config"
+)
+
+const (
+	AuthMethodNoAuth   = "noauth"
+	AuthMethodUserPass = "password"
+)
+
+func init() {
+	config.RegisterInboundConnectionConfig("socks",
+		func(data []byte) (interface{}, error) {
+			type SocksAccount struct {
+				Username string `json:"user"`
+				Password string `json:"pass"`
+			}
+
+			type SocksConfig struct {
+				AuthMethod string          `json:"auth"`
+				Accounts   []*SocksAccount `json:"accounts"`
+				UDP        bool            `json:"udp"`
+				Host       *v2netjson.Host `json:"ip"`
+			}
+
+			rawConfig := new(SocksConfig)
+			if err := json.Unmarshal(data, rawConfig); err != nil {
+				return nil, err
+			}
+			socksConfig := new(Config)
+			if rawConfig.AuthMethod == AuthMethodNoAuth {
+				socksConfig.AuthType = AuthTypeNoAuth
+			} else if rawConfig.AuthMethod == AuthMethodUserPass {
+				socksConfig.AuthType = AuthTypePassword
+			} else {
+				log.Error("Socks: Unknown auth method: %s", rawConfig.AuthMethod)
+				return nil, internal.ErrorBadConfiguration
+			}
+
+			if len(rawConfig.Accounts) > 0 {
+				socksConfig.Accounts = make(map[string]string, len(rawConfig.Accounts))
+				for _, account := range rawConfig.Accounts {
+					socksConfig.Accounts[account.Username] = account.Password
+				}
+			}
+
+			socksConfig.UDPEnabled = rawConfig.UDP
+			if rawConfig.Host != nil {
+				socksConfig.Address = rawConfig.Host.Address()
+			} else {
+				socksConfig.Address = v2net.IPAddress([]byte{127, 0, 0, 1})
+			}
+			return socksConfig, nil
+		})
+}