119 lines
2.7 KiB
Go
119 lines
2.7 KiB
Go
// Copyright 2015 The go-ethereum Authors
|
|
// This file is part of go-ethereum.
|
|
//
|
|
// go-ethereum is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// go-ethereum is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package comms
|
|
|
|
import (
|
|
"fmt"
|
|
"math/rand"
|
|
"net"
|
|
|
|
"encoding/json"
|
|
|
|
"github.com/ethereum/go-ethereum/rpc/codec"
|
|
"github.com/ethereum/go-ethereum/rpc/shared"
|
|
)
|
|
|
|
type IpcConfig struct {
|
|
Endpoint string
|
|
}
|
|
|
|
type ipcClient struct {
|
|
endpoint string
|
|
c net.Conn
|
|
codec codec.Codec
|
|
coder codec.ApiCoder
|
|
}
|
|
|
|
func (self *ipcClient) Close() {
|
|
self.coder.Close()
|
|
}
|
|
|
|
func (self *ipcClient) Send(req interface{}) error {
|
|
var err error
|
|
if r, ok := req.(*shared.Request); ok {
|
|
if err = self.coder.WriteResponse(r); err != nil {
|
|
if _, ok := err.(*net.OpError); ok { // connection lost, retry once
|
|
if err = self.reconnect(); err == nil {
|
|
err = self.coder.WriteResponse(r)
|
|
}
|
|
}
|
|
}
|
|
return err
|
|
}
|
|
|
|
return fmt.Errorf("Invalid request (%T)", req)
|
|
}
|
|
|
|
func (self *ipcClient) Recv() (interface{}, error) {
|
|
res, err := self.coder.ReadResponse()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if r, ok := res.(shared.SuccessResponse); ok {
|
|
return r.Result, nil
|
|
}
|
|
|
|
if r, ok := res.(shared.ErrorResponse); ok {
|
|
return r.Error, nil
|
|
}
|
|
|
|
return res, err
|
|
}
|
|
|
|
func (self *ipcClient) SupportedModules() (map[string]string, error) {
|
|
req := shared.Request{
|
|
Id: 1,
|
|
Jsonrpc: "2.0",
|
|
Method: "modules",
|
|
}
|
|
|
|
if err := self.coder.WriteResponse(req); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
res, err := self.coder.ReadResponse()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if sucRes, ok := res.(shared.SuccessResponse); ok {
|
|
data, _ := json.Marshal(sucRes.Result)
|
|
modules := make(map[string]string)
|
|
err = json.Unmarshal(data, &modules)
|
|
if err == nil {
|
|
return modules, nil
|
|
}
|
|
}
|
|
|
|
return nil, fmt.Errorf("Invalid response")
|
|
}
|
|
|
|
// Create a new IPC client, UNIX domain socket on posix, named pipe on Windows
|
|
func NewIpcClient(cfg IpcConfig, codec codec.Codec) (*ipcClient, error) {
|
|
return newIpcClient(cfg, codec)
|
|
}
|
|
|
|
// Start IPC server
|
|
func StartIpc(cfg IpcConfig, codec codec.Codec, offeredApi shared.EthereumApi) error {
|
|
return startIpc(cfg, codec, offeredApi)
|
|
}
|
|
|
|
func newIpcConnId() int {
|
|
return rand.Int() % 1000000
|
|
}
|