github.com/Andyfoo/golang/x/net@v0.0.0-20190901054642-57c1bf301704/internal/socket/sys_unix.go (about) 1 // Copyright 2017 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 // +build dragonfly freebsd linux,!s390x,!386 netbsd openbsd 6 7 package socket 8 9 import ( 10 "syscall" 11 "unsafe" 12 ) 13 14 func getsockopt(s uintptr, level, name int, b []byte) (int, error) { 15 l := uint32(len(b)) 16 _, _, errno := syscall.Syscall6(syscall.SYS_GETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(unsafe.Pointer(&l)), 0) 17 return int(l), errnoErr(errno) 18 } 19 20 func setsockopt(s uintptr, level, name int, b []byte) error { 21 _, _, errno := syscall.Syscall6(syscall.SYS_SETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(len(b)), 0) 22 return errnoErr(errno) 23 } 24 25 func recvmsg(s uintptr, h *msghdr, flags int) (int, error) { 26 n, _, errno := syscall.Syscall(syscall.SYS_RECVMSG, s, uintptr(unsafe.Pointer(h)), uintptr(flags)) 27 return int(n), errnoErr(errno) 28 } 29 30 func sendmsg(s uintptr, h *msghdr, flags int) (int, error) { 31 n, _, errno := syscall.Syscall(syscall.SYS_SENDMSG, s, uintptr(unsafe.Pointer(h)), uintptr(flags)) 32 return int(n), errnoErr(errno) 33 }