1// Copyright 2020 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 5package socket 6 7import ( 8 "syscall" 9 "unsafe" 10) 11 12func syscall_syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err syscall.Errno) 13func syscall_syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno) 14 15func probeProtocolStack() int { 16 return 4 // sizeof(int) on GOOS=zos GOARCH=s390x 17} 18 19func getsockopt(s uintptr, level, name int, b []byte) (int, error) { 20 l := uint32(len(b)) 21 _, _, errno := syscall_syscall6(syscall.SYS_GETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(unsafe.Pointer(&l)), 0) 22 return int(l), errnoErr(errno) 23} 24 25func setsockopt(s uintptr, level, name int, b []byte) error { 26 _, _, errno := syscall_syscall6(syscall.SYS_SETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(len(b)), 0) 27 return errnoErr(errno) 28} 29 30func recvmsg(s uintptr, h *msghdr, flags int) (int, error) { 31 n, _, errno := syscall_syscall(syscall.SYS___RECVMSG_A, s, uintptr(unsafe.Pointer(h)), uintptr(flags)) 32 return int(n), errnoErr(errno) 33} 34 35func sendmsg(s uintptr, h *msghdr, flags int) (int, error) { 36 n, _, errno := syscall_syscall(syscall.SYS___SENDMSG_A, s, uintptr(unsafe.Pointer(h)), uintptr(flags)) 37 return int(n), errnoErr(errno) 38} 39