github.com/m10x/go/src@v0.0.0-20220112094212-ba61592315da/net/sockopt_aix.go (about) 1 // Copyright 2018 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 package net 6 7 import ( 8 "os" 9 "syscall" 10 ) 11 12 func setDefaultSockopts(s, family, sotype int, ipv6only bool) error { 13 if family == syscall.AF_INET6 && sotype != syscall.SOCK_RAW { 14 // Allow both IP versions even if the OS default 15 // is otherwise. Note that some operating systems 16 // never admit this option. 17 syscall.SetsockoptInt(s, syscall.IPPROTO_IPV6, syscall.IPV6_V6ONLY, boolint(ipv6only)) 18 } 19 if (sotype == syscall.SOCK_DGRAM || sotype == syscall.SOCK_RAW) && family != syscall.AF_UNIX { 20 // Allow broadcast. 21 return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_BROADCAST, 1)) 22 } 23 return nil 24 } 25 26 func setDefaultListenerSockopts(s int) error { 27 // Allow reuse of recently-used addresses. 28 return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1)) 29 } 30 31 func setDefaultMulticastSockopts(s int) error { 32 // Allow multicast UDP and raw IP datagram sockets to listen 33 // concurrently across multiple listeners. 34 if err := syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1); err != nil { 35 return os.NewSyscallError("setsockopt", err) 36 } 37 // Allow reuse of recently-used ports. 38 return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEPORT, 1)) 39 }