90 lines
2.5 KiB
Go
90 lines
2.5 KiB
Go
// VulcanizeDB
|
|
// Copyright © 2022 Vulcanize
|
|
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
|
|
// This program 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 Affero General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package rpc
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"os"
|
|
"path/filepath"
|
|
|
|
"github.com/ethereum/go-ethereum/p2p/netutil"
|
|
"github.com/ethereum/go-ethereum/rpc"
|
|
log "github.com/sirupsen/logrus"
|
|
)
|
|
|
|
var (
|
|
// On Linux, sun_path is 108 bytes in size
|
|
// see http://man7.org/linux/man-pages/man7/unix.7.html
|
|
maxPathSize = 108
|
|
)
|
|
|
|
// ipcListen will create a Unix socket on the given endpoint.
|
|
func ipcListen(endpoint string) (net.Listener, error) {
|
|
if len(endpoint) > int(maxPathSize) {
|
|
log.Warn(fmt.Sprintf("The ipc endpoint is longer than %d characters. ", maxPathSize),
|
|
"endpoint", endpoint)
|
|
}
|
|
|
|
// Ensure the IPC path exists and remove any previous leftover
|
|
if err := os.MkdirAll(filepath.Dir(endpoint), 0751); err != nil {
|
|
return nil, err
|
|
}
|
|
os.Remove(endpoint)
|
|
l, err := net.Listen("unix", endpoint)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
os.Chmod(endpoint, 0600)
|
|
return l, nil
|
|
}
|
|
|
|
func ipcServe(srv *rpc.Server, listener net.Listener) {
|
|
for {
|
|
conn, err := listener.Accept()
|
|
if netutil.IsTemporaryError(err) {
|
|
log.WithError(err).Warn("rpc accept error")
|
|
continue
|
|
}
|
|
if err != nil {
|
|
log.WithError(err).Warn("unknown error")
|
|
continue
|
|
}
|
|
log.WithField("addr", conn.RemoteAddr()).Trace("accepted ipc connection")
|
|
}
|
|
}
|
|
|
|
// StartIPCEndpoint starts an IPC endpoint.
|
|
func StartIPCEndpoint(ipcEndpoint string, apis []rpc.API) (net.Listener, *rpc.Server, error) {
|
|
// Register all the APIs exposed by the services.
|
|
handler := rpc.NewServer()
|
|
for _, api := range apis {
|
|
if err := handler.RegisterName(api.Namespace, api.Service); err != nil {
|
|
return nil, nil, err
|
|
}
|
|
log.Debug("IPC registered", "namespace", api.Namespace)
|
|
}
|
|
// All APIs registered, start the IPC listener.
|
|
listener, err := ipcListen(ipcEndpoint)
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
go ipcServe(handler, listener)
|
|
return listener, handler, nil
|
|
}
|