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// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library 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.
//
// The go-ethereum library 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 the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// +build darwin dragonfly freebsd linux nacl netbsd openbsd solaris
package comms
import (
"net"
"os"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/rpc/codec"
"github.com/ethereum/go-ethereum/rpc/shared"
"github.com/ethereum/go-ethereum/rpc/useragent"
)
func newIpcClient(cfg IpcConfig, codec codec.Codec) (*ipcClient, error) {
c, err := net.DialUnix("unix", nil, &net.UnixAddr{cfg.Endpoint, "unix"})
if err != nil {
return nil, err
}
coder := codec.New(c)
msg := shared.Request{
Id: 0,
Method: useragent.EnableUserAgentMethod,
Jsonrpc: shared.JsonRpcVersion,
Params: []byte("[]"),
}
coder.WriteResponse(msg)
coder.Recv()
return &ipcClient{cfg.Endpoint, c, codec, coder}, nil
}
func (self *ipcClient) reconnect() error {
self.coder.Close()
c, err := net.DialUnix("unix", nil, &net.UnixAddr{self.endpoint, "unix"})
if err == nil {
self.coder = self.codec.New(c)
msg := shared.Request{
Id: 0,
Method: useragent.EnableUserAgentMethod,
Jsonrpc: shared.JsonRpcVersion,
Params: []byte("[]"),
}
self.coder.WriteResponse(msg)
self.coder.Recv()
}
return err
}
func startIpc(cfg IpcConfig, codec codec.Codec, initializer func(conn net.Conn) (shared.EthereumApi, error)) error {
os.Remove(cfg.Endpoint) // in case it still exists from a previous run
l, err := net.ListenUnix("unix", &net.UnixAddr{Name: cfg.Endpoint, Net: "unix"})
if err != nil {
return err
}
os.Chmod(cfg.Endpoint, 0600)
go func() {
for {
conn, err := l.AcceptUnix()
if err != nil {
glog.V(logger.Error).Infof("Error accepting ipc connection - %v\n", err)
continue
}
id := newIpcConnId()
glog.V(logger.Debug).Infof("New IPC connection with id %06d started\n", id)
api, err := initializer(conn)
if err != nil {
glog.V(logger.Error).Infof("Unable to initialize IPC connection - %v\n", err)
conn.Close()
continue
}
go handle(id, conn, api, codec)
}
os.Remove(cfg.Endpoint)
}()
glog.V(logger.Info).Infof("IPC service started (%s)\n", cfg.Endpoint)
return nil
}
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