mirror of https://github.com/poanetwork/quorum.git
697 lines
19 KiB
Go
697 lines
19 KiB
Go
// +build windows
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package comms
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import (
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"fmt"
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"io"
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"net"
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"os"
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"sync"
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"syscall"
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"time"
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"unsafe"
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"github.com/ethereum/go-ethereum/logger"
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"github.com/ethereum/go-ethereum/logger/glog"
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"github.com/ethereum/go-ethereum/rpc/api"
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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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var (
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modkernel32 = syscall.NewLazyDLL("kernel32.dll")
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procCreateNamedPipeW = modkernel32.NewProc("CreateNamedPipeW")
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procConnectNamedPipe = modkernel32.NewProc("ConnectNamedPipe")
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procDisconnectNamedPipe = modkernel32.NewProc("DisconnectNamedPipe")
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procWaitNamedPipeW = modkernel32.NewProc("WaitNamedPipeW")
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procCreateEventW = modkernel32.NewProc("CreateEventW")
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procGetOverlappedResult = modkernel32.NewProc("GetOverlappedResult")
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procCancelIoEx = modkernel32.NewProc("CancelIoEx")
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)
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func createNamedPipe(name *uint16, openMode uint32, pipeMode uint32, maxInstances uint32, outBufSize uint32, inBufSize uint32, defaultTimeout uint32, sa *syscall.SecurityAttributes) (handle syscall.Handle, err error) {
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r0, _, e1 := syscall.Syscall9(procCreateNamedPipeW.Addr(), 8, uintptr(unsafe.Pointer(name)), uintptr(openMode), uintptr(pipeMode), uintptr(maxInstances), uintptr(outBufSize), uintptr(inBufSize), uintptr(defaultTimeout), uintptr(unsafe.Pointer(sa)), 0)
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handle = syscall.Handle(r0)
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if handle == syscall.InvalidHandle {
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if e1 != 0 {
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err = error(e1)
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} else {
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err = syscall.EINVAL
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}
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}
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return
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}
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func cancelIoEx(handle syscall.Handle, overlapped *syscall.Overlapped) (err error) {
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r1, _, e1 := syscall.Syscall(procCancelIoEx.Addr(), 2, uintptr(handle), uintptr(unsafe.Pointer(overlapped)), 0)
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if r1 == 0 {
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if e1 != 0 {
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err = error(e1)
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} else {
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err = syscall.EINVAL
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}
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}
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return
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}
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func connectNamedPipe(handle syscall.Handle, overlapped *syscall.Overlapped) (err error) {
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r1, _, e1 := syscall.Syscall(procConnectNamedPipe.Addr(), 2, uintptr(handle), uintptr(unsafe.Pointer(overlapped)), 0)
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if r1 == 0 {
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if e1 != 0 {
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err = error(e1)
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} else {
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err = syscall.EINVAL
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}
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}
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return
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}
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func disconnectNamedPipe(handle syscall.Handle) (err error) {
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r1, _, e1 := syscall.Syscall(procDisconnectNamedPipe.Addr(), 1, uintptr(handle), 0, 0)
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if r1 == 0 {
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if e1 != 0 {
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err = error(e1)
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} else {
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err = syscall.EINVAL
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}
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}
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return
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}
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func waitNamedPipe(name *uint16, timeout uint32) (err error) {
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r1, _, e1 := syscall.Syscall(procWaitNamedPipeW.Addr(), 2, uintptr(unsafe.Pointer(name)), uintptr(timeout), 0)
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if r1 == 0 {
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if e1 != 0 {
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err = error(e1)
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} else {
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err = syscall.EINVAL
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}
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}
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return
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}
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func createEvent(sa *syscall.SecurityAttributes, manualReset bool, initialState bool, name *uint16) (handle syscall.Handle, err error) {
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var _p0 uint32
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if manualReset {
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_p0 = 1
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} else {
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_p0 = 0
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}
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var _p1 uint32
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if initialState {
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_p1 = 1
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} else {
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_p1 = 0
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}
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r0, _, e1 := syscall.Syscall6(procCreateEventW.Addr(), 4, uintptr(unsafe.Pointer(sa)), uintptr(_p0), uintptr(_p1), uintptr(unsafe.Pointer(name)), 0, 0)
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handle = syscall.Handle(r0)
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if handle == syscall.InvalidHandle {
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if e1 != 0 {
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err = error(e1)
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} else {
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err = syscall.EINVAL
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}
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}
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return
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}
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func getOverlappedResult(handle syscall.Handle, overlapped *syscall.Overlapped, transferred *uint32, wait bool) (err error) {
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var _p0 uint32
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if wait {
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_p0 = 1
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} else {
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_p0 = 0
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}
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r1, _, e1 := syscall.Syscall6(procGetOverlappedResult.Addr(), 4, uintptr(handle), uintptr(unsafe.Pointer(overlapped)), uintptr(unsafe.Pointer(transferred)), uintptr(_p0), 0, 0)
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if r1 == 0 {
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if e1 != 0 {
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err = error(e1)
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} else {
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err = syscall.EINVAL
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}
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}
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return
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}
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const (
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// openMode
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pipe_access_duplex = 0x3
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pipe_access_inbound = 0x1
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pipe_access_outbound = 0x2
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// openMode write flags
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file_flag_first_pipe_instance = 0x00080000
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file_flag_write_through = 0x80000000
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file_flag_overlapped = 0x40000000
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// openMode ACL flags
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write_dac = 0x00040000
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write_owner = 0x00080000
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access_system_security = 0x01000000
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// pipeMode
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pipe_type_byte = 0x0
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pipe_type_message = 0x4
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// pipeMode read mode flags
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pipe_readmode_byte = 0x0
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pipe_readmode_message = 0x2
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// pipeMode wait mode flags
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pipe_wait = 0x0
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pipe_nowait = 0x1
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// pipeMode remote-client mode flags
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pipe_accept_remote_clients = 0x0
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pipe_reject_remote_clients = 0x8
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pipe_unlimited_instances = 255
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nmpwait_wait_forever = 0xFFFFFFFF
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// the two not-an-errors below occur if a client connects to the pipe between
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// the server's CreateNamedPipe and ConnectNamedPipe calls.
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error_no_data syscall.Errno = 0xE8
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error_pipe_connected syscall.Errno = 0x217
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error_pipe_busy syscall.Errno = 0xE7
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error_sem_timeout syscall.Errno = 0x79
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error_bad_pathname syscall.Errno = 0xA1
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error_invalid_name syscall.Errno = 0x7B
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error_io_incomplete syscall.Errno = 0x3e4
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)
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var _ net.Conn = (*PipeConn)(nil)
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var _ net.Listener = (*PipeListener)(nil)
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// ErrClosed is the error returned by PipeListener.Accept when Close is called
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// on the PipeListener.
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var ErrClosed = PipeError{"Pipe has been closed.", false}
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// PipeError is an error related to a call to a pipe
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type PipeError struct {
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msg string
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timeout bool
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}
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// Error implements the error interface
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func (e PipeError) Error() string {
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return e.msg
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}
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// Timeout implements net.AddrError.Timeout()
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func (e PipeError) Timeout() bool {
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return e.timeout
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}
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// Temporary implements net.AddrError.Temporary()
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func (e PipeError) Temporary() bool {
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return false
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}
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// Dial connects to a named pipe with the given address. If the specified pipe is not available,
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// it will wait indefinitely for the pipe to become available.
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//
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// The address must be of the form \\.\\pipe\<name> for local pipes and \\<computer>\pipe\<name>
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// for remote pipes.
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//
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// Dial will return a PipeError if you pass in a badly formatted pipe name.
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//
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// Examples:
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// // local pipe
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// conn, err := Dial(`\\.\pipe\mypipename`)
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//
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// // remote pipe
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// conn, err := Dial(`\\othercomp\pipe\mypipename`)
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func Dial(address string) (*PipeConn, error) {
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for {
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conn, err := dial(address, nmpwait_wait_forever)
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if err == nil {
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return conn, nil
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}
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if isPipeNotReady(err) {
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<-time.After(100 * time.Millisecond)
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continue
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}
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return nil, err
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}
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}
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// DialTimeout acts like Dial, but will time out after the duration of timeout
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func DialTimeout(address string, timeout time.Duration) (*PipeConn, error) {
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deadline := time.Now().Add(timeout)
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now := time.Now()
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for now.Before(deadline) {
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millis := uint32(deadline.Sub(now) / time.Millisecond)
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conn, err := dial(address, millis)
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if err == nil {
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return conn, nil
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}
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if err == error_sem_timeout {
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// This is WaitNamedPipe's timeout error, so we know we're done
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return nil, PipeError{fmt.Sprintf(
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"Timed out waiting for pipe '%s' to come available", address), true}
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}
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if isPipeNotReady(err) {
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left := deadline.Sub(time.Now())
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retry := 100 * time.Millisecond
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if left > retry {
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<-time.After(retry)
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} else {
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<-time.After(left - time.Millisecond)
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}
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now = time.Now()
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continue
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}
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return nil, err
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}
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return nil, PipeError{fmt.Sprintf(
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"Timed out waiting for pipe '%s' to come available", address), true}
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}
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// isPipeNotReady checks the error to see if it indicates the pipe is not ready
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func isPipeNotReady(err error) bool {
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// Pipe Busy means another client just grabbed the open pipe end,
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// and the server hasn't made a new one yet.
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// File Not Found means the server hasn't created the pipe yet.
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// Neither is a fatal error.
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return err == syscall.ERROR_FILE_NOT_FOUND || err == error_pipe_busy
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}
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// newOverlapped creates a structure used to track asynchronous
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// I/O requests that have been issued.
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func newOverlapped() (*syscall.Overlapped, error) {
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event, err := createEvent(nil, true, true, nil)
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if err != nil {
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return nil, err
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}
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return &syscall.Overlapped{HEvent: event}, nil
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}
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// waitForCompletion waits for an asynchronous I/O request referred to by overlapped to complete.
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// This function returns the number of bytes transferred by the operation and an error code if
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// applicable (nil otherwise).
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func waitForCompletion(handle syscall.Handle, overlapped *syscall.Overlapped) (uint32, error) {
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_, err := syscall.WaitForSingleObject(overlapped.HEvent, syscall.INFINITE)
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if err != nil {
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return 0, err
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}
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var transferred uint32
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err = getOverlappedResult(handle, overlapped, &transferred, true)
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return transferred, err
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}
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// dial is a helper to initiate a connection to a named pipe that has been started by a server.
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// The timeout is only enforced if the pipe server has already created the pipe, otherwise
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// this function will return immediately.
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func dial(address string, timeout uint32) (*PipeConn, error) {
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name, err := syscall.UTF16PtrFromString(string(address))
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if err != nil {
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return nil, err
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}
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// If at least one instance of the pipe has been created, this function
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// will wait timeout milliseconds for it to become available.
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// It will return immediately regardless of timeout, if no instances
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// of the named pipe have been created yet.
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// If this returns with no error, there is a pipe available.
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if err := waitNamedPipe(name, timeout); err != nil {
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if err == error_bad_pathname {
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// badly formatted pipe name
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return nil, badAddr(address)
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}
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return nil, err
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}
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pathp, err := syscall.UTF16PtrFromString(address)
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if err != nil {
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return nil, err
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}
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handle, err := syscall.CreateFile(pathp, syscall.GENERIC_READ|syscall.GENERIC_WRITE,
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uint32(syscall.FILE_SHARE_READ|syscall.FILE_SHARE_WRITE), nil, syscall.OPEN_EXISTING,
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syscall.FILE_FLAG_OVERLAPPED, 0)
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if err != nil {
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return nil, err
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}
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return &PipeConn{handle: handle, addr: PipeAddr(address)}, nil
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}
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// Listen returns a new PipeListener that will listen on a pipe with the given
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// address. The address must be of the form \\.\pipe\<name>
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//
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// Listen will return a PipeError for an incorrectly formatted pipe name.
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func Listen(address string) (*PipeListener, error) {
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handle, err := createPipe(address, true)
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if err == error_invalid_name {
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return nil, badAddr(address)
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}
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if err != nil {
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return nil, err
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}
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return &PipeListener{
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addr: PipeAddr(address),
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handle: handle,
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}, nil
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}
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// PipeListener is a named pipe listener. Clients should typically
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// use variables of type net.Listener instead of assuming named pipe.
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type PipeListener struct {
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addr PipeAddr
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handle syscall.Handle
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closed bool
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// acceptHandle contains the current handle waiting for
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// an incoming connection or nil.
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acceptHandle syscall.Handle
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// acceptOverlapped is set before waiting on a connection.
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// If not waiting, it is nil.
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acceptOverlapped *syscall.Overlapped
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// acceptMutex protects the handle and overlapped structure.
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acceptMutex sync.Mutex
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}
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// Accept implements the Accept method in the net.Listener interface; it
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// waits for the next call and returns a generic net.Conn.
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func (l *PipeListener) Accept() (net.Conn, error) {
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c, err := l.AcceptPipe()
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for err == error_no_data {
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// Ignore clients that connect and immediately disconnect.
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c, err = l.AcceptPipe()
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}
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if err != nil {
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return nil, err
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}
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return c, nil
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}
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// AcceptPipe accepts the next incoming call and returns the new connection.
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// It might return an error if a client connected and immediately cancelled
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// the connection.
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func (l *PipeListener) AcceptPipe() (*PipeConn, error) {
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if l == nil || l.addr == "" || l.closed {
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return nil, syscall.EINVAL
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}
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// the first time we call accept, the handle will have been created by the Listen
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// call. This is to prevent race conditions where the client thinks the server
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// isn't listening because it hasn't actually called create yet. After the first time, we'll
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// have to create a new handle each time
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handle := l.handle
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if handle == 0 {
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var err error
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handle, err = createPipe(string(l.addr), false)
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if err != nil {
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return nil, err
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}
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} else {
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l.handle = 0
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}
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overlapped, err := newOverlapped()
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if err != nil {
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return nil, err
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}
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defer syscall.CloseHandle(overlapped.HEvent)
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if err := connectNamedPipe(handle, overlapped); err != nil && err != error_pipe_connected {
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if err == error_io_incomplete || err == syscall.ERROR_IO_PENDING {
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l.acceptMutex.Lock()
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l.acceptOverlapped = overlapped
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l.acceptHandle = handle
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l.acceptMutex.Unlock()
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defer func() {
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l.acceptMutex.Lock()
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l.acceptOverlapped = nil
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l.acceptHandle = 0
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l.acceptMutex.Unlock()
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}()
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_, err = waitForCompletion(handle, overlapped)
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}
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if err == syscall.ERROR_OPERATION_ABORTED {
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// Return error compatible to net.Listener.Accept() in case the
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// listener was closed.
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return nil, ErrClosed
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}
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if err != nil {
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return nil, err
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}
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}
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return &PipeConn{handle: handle, addr: l.addr}, nil
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}
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// Close stops listening on the address.
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// Already Accepted connections are not closed.
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func (l *PipeListener) Close() error {
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if l.closed {
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return nil
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}
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l.closed = true
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if l.handle != 0 {
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err := disconnectNamedPipe(l.handle)
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if err != nil {
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return err
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}
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err = syscall.CloseHandle(l.handle)
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if err != nil {
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return err
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}
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l.handle = 0
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}
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l.acceptMutex.Lock()
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defer l.acceptMutex.Unlock()
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if l.acceptOverlapped != nil && l.acceptHandle != 0 {
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// Cancel the pending IO. This call does not block, so it is safe
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// to hold onto the mutex above.
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if err := cancelIoEx(l.acceptHandle, l.acceptOverlapped); err != nil {
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return err
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}
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err := syscall.CloseHandle(l.acceptOverlapped.HEvent)
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if err != nil {
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return err
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}
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l.acceptOverlapped.HEvent = 0
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err = syscall.CloseHandle(l.acceptHandle)
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if err != nil {
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return err
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}
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l.acceptHandle = 0
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}
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return nil
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}
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// Addr returns the listener's network address, a PipeAddr.
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func (l *PipeListener) Addr() net.Addr { return l.addr }
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// PipeConn is the implementation of the net.Conn interface for named pipe connections.
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type PipeConn struct {
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handle syscall.Handle
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addr PipeAddr
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// these aren't actually used yet
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readDeadline *time.Time
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writeDeadline *time.Time
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}
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type iodata struct {
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n uint32
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err error
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}
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// completeRequest looks at iodata to see if a request is pending. If so, it waits for it to either complete or to
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// abort due to hitting the specified deadline. Deadline may be set to nil to wait forever. If no request is pending,
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// the content of iodata is returned.
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func (c *PipeConn) completeRequest(data iodata, deadline *time.Time, overlapped *syscall.Overlapped) (int, error) {
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if data.err == error_io_incomplete || data.err == syscall.ERROR_IO_PENDING {
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var timer <-chan time.Time
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if deadline != nil {
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if timeDiff := deadline.Sub(time.Now()); timeDiff > 0 {
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timer = time.After(timeDiff)
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}
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}
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done := make(chan iodata)
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go func() {
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n, err := waitForCompletion(c.handle, overlapped)
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done <- iodata{n, err}
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}()
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select {
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case data = <-done:
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case <-timer:
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syscall.CancelIoEx(c.handle, overlapped)
|
|
data = iodata{0, timeout(c.addr.String())}
|
|
}
|
|
}
|
|
// Windows will produce ERROR_BROKEN_PIPE upon closing
|
|
// a handle on the other end of a connection. Go RPC
|
|
// expects an io.EOF error in this case.
|
|
if data.err == syscall.ERROR_BROKEN_PIPE {
|
|
data.err = io.EOF
|
|
}
|
|
return int(data.n), data.err
|
|
}
|
|
|
|
// Read implements the net.Conn Read method.
|
|
func (c *PipeConn) Read(b []byte) (int, error) {
|
|
// Use ReadFile() rather than Read() because the latter
|
|
// contains a workaround that eats ERROR_BROKEN_PIPE.
|
|
overlapped, err := newOverlapped()
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
defer syscall.CloseHandle(overlapped.HEvent)
|
|
var n uint32
|
|
err = syscall.ReadFile(c.handle, b, &n, overlapped)
|
|
return c.completeRequest(iodata{n, err}, c.readDeadline, overlapped)
|
|
}
|
|
|
|
// Write implements the net.Conn Write method.
|
|
func (c *PipeConn) Write(b []byte) (int, error) {
|
|
overlapped, err := newOverlapped()
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
defer syscall.CloseHandle(overlapped.HEvent)
|
|
var n uint32
|
|
err = syscall.WriteFile(c.handle, b, &n, overlapped)
|
|
return c.completeRequest(iodata{n, err}, c.writeDeadline, overlapped)
|
|
}
|
|
|
|
// Close closes the connection.
|
|
func (c *PipeConn) Close() error {
|
|
return syscall.CloseHandle(c.handle)
|
|
}
|
|
|
|
// LocalAddr returns the local network address.
|
|
func (c *PipeConn) LocalAddr() net.Addr {
|
|
return c.addr
|
|
}
|
|
|
|
// RemoteAddr returns the remote network address.
|
|
func (c *PipeConn) RemoteAddr() net.Addr {
|
|
// not sure what to do here, we don't have remote addr....
|
|
return c.addr
|
|
}
|
|
|
|
// SetDeadline implements the net.Conn SetDeadline method.
|
|
// Note that timeouts are only supported on Windows Vista/Server 2008 and above
|
|
func (c *PipeConn) SetDeadline(t time.Time) error {
|
|
c.SetReadDeadline(t)
|
|
c.SetWriteDeadline(t)
|
|
return nil
|
|
}
|
|
|
|
// SetReadDeadline implements the net.Conn SetReadDeadline method.
|
|
// Note that timeouts are only supported on Windows Vista/Server 2008 and above
|
|
func (c *PipeConn) SetReadDeadline(t time.Time) error {
|
|
c.readDeadline = &t
|
|
return nil
|
|
}
|
|
|
|
// SetWriteDeadline implements the net.Conn SetWriteDeadline method.
|
|
// Note that timeouts are only supported on Windows Vista/Server 2008 and above
|
|
func (c *PipeConn) SetWriteDeadline(t time.Time) error {
|
|
c.writeDeadline = &t
|
|
return nil
|
|
}
|
|
|
|
// PipeAddr represents the address of a named pipe.
|
|
type PipeAddr string
|
|
|
|
// Network returns the address's network name, "pipe".
|
|
func (a PipeAddr) Network() string { return "pipe" }
|
|
|
|
// String returns the address of the pipe
|
|
func (a PipeAddr) String() string {
|
|
return string(a)
|
|
}
|
|
|
|
// createPipe is a helper function to make sure we always create pipes
|
|
// with the same arguments, since subsequent calls to create pipe need
|
|
// to use the same arguments as the first one. If first is set, fail
|
|
// if the pipe already exists.
|
|
func createPipe(address string, first bool) (syscall.Handle, error) {
|
|
n, err := syscall.UTF16PtrFromString(address)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
mode := uint32(pipe_access_duplex | syscall.FILE_FLAG_OVERLAPPED)
|
|
if first {
|
|
mode |= file_flag_first_pipe_instance
|
|
}
|
|
return createNamedPipe(n,
|
|
mode,
|
|
pipe_type_byte,
|
|
pipe_unlimited_instances,
|
|
512, 512, 0, nil)
|
|
}
|
|
|
|
func badAddr(addr string) PipeError {
|
|
return PipeError{fmt.Sprintf("Invalid pipe address '%s'.", addr), false}
|
|
}
|
|
func timeout(addr string) PipeError {
|
|
return PipeError{fmt.Sprintf("Pipe IO timed out waiting for '%s'", addr), true}
|
|
}
|
|
|
|
func newIpcClient(cfg IpcConfig, codec codec.Codec) (*ipcClient, error) {
|
|
c, err := Dial(cfg.Endpoint)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &ipcClient{codec.New(c)}, nil
|
|
}
|
|
|
|
func startIpc(cfg IpcConfig, codec codec.Codec, api api.EthereumApi) error {
|
|
os.Remove(cfg.Endpoint) // in case it still exists from a previous run
|
|
|
|
l, err := Listen(cfg.Endpoint)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
os.Chmod(cfg.Endpoint, 0600)
|
|
|
|
go func() {
|
|
for {
|
|
conn, err := l.Accept()
|
|
if err != nil {
|
|
glog.V(logger.Error).Infof("Error accepting ipc connection - %v\n", err)
|
|
continue
|
|
}
|
|
|
|
go func(conn net.Conn) {
|
|
codec := codec.New(conn)
|
|
|
|
for {
|
|
req, err := codec.ReadRequest()
|
|
if err == io.EOF {
|
|
codec.Close()
|
|
return
|
|
} else if err != nil {
|
|
glog.V(logger.Error).Infof("IPC recv err - %v\n", err)
|
|
codec.Close()
|
|
return
|
|
}
|
|
|
|
var rpcResponse interface{}
|
|
res, err := api.Execute(req)
|
|
|
|
rpcResponse = shared.NewRpcResponse(req.Id, req.Jsonrpc, res, err)
|
|
err = codec.WriteResponse(rpcResponse)
|
|
if err != nil {
|
|
glog.V(logger.Error).Infof("IPC send err - %v\n", err)
|
|
codec.Close()
|
|
return
|
|
}
|
|
}
|
|
}(conn)
|
|
}
|
|
}()
|
|
|
|
glog.V(logger.Info).Infof("IPC service started (%s)\n", cfg.Endpoint)
|
|
|
|
return nil
|
|
}
|