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