56 lines
1.8 KiB
Go
56 lines
1.8 KiB
Go
// Copyright 2017 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package socket
|
|
|
|
import (
|
|
"syscall"
|
|
"unsafe"
|
|
)
|
|
|
|
func probeProtocolStack() int { return 8 }
|
|
|
|
const (
|
|
sysSETSOCKOPT = 0xe
|
|
sysGETSOCKOPT = 0xf
|
|
sysSENDMSG = 0x10
|
|
sysRECVMSG = 0x11
|
|
sysRECVMMSG = 0x13
|
|
sysSENDMMSG = 0x14
|
|
)
|
|
|
|
func socketcall(call, a0, a1, a2, a3, a4, a5 uintptr) (uintptr, syscall.Errno)
|
|
func rawsocketcall(call, a0, a1, a2, a3, a4, a5 uintptr) (uintptr, syscall.Errno)
|
|
|
|
func getsockopt(s uintptr, level, name int, b []byte) (int, error) {
|
|
l := uint32(len(b))
|
|
_, errno := socketcall(sysGETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(unsafe.Pointer(&l)), 0)
|
|
return int(l), errnoErr(errno)
|
|
}
|
|
|
|
func setsockopt(s uintptr, level, name int, b []byte) error {
|
|
_, errno := socketcall(sysSETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(len(b)), 0)
|
|
return errnoErr(errno)
|
|
}
|
|
|
|
func recvmsg(s uintptr, h *msghdr, flags int) (int, error) {
|
|
n, errno := socketcall(sysRECVMSG, s, uintptr(unsafe.Pointer(h)), uintptr(flags), 0, 0, 0)
|
|
return int(n), errnoErr(errno)
|
|
}
|
|
|
|
func sendmsg(s uintptr, h *msghdr, flags int) (int, error) {
|
|
n, errno := socketcall(sysSENDMSG, s, uintptr(unsafe.Pointer(h)), uintptr(flags), 0, 0, 0)
|
|
return int(n), errnoErr(errno)
|
|
}
|
|
|
|
func recvmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
|
|
n, errno := socketcall(sysRECVMMSG, s, uintptr(unsafe.Pointer(&hs[0])), uintptr(len(hs)), uintptr(flags), 0, 0)
|
|
return int(n), errnoErr(errno)
|
|
}
|
|
|
|
func sendmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
|
|
n, errno := socketcall(sysSENDMMSG, s, uintptr(unsafe.Pointer(&hs[0])), uintptr(len(hs)), uintptr(flags), 0, 0)
|
|
return int(n), errnoErr(errno)
|
|
}
|