From e1e8d058a33f7566f9c565d04b0d8b56f9645c35 Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Wed, 25 Apr 2018 09:28:54 +0200 Subject: add vendor --- vendor/golang.org/x/net/ipv4/sys_asmreq.go | 119 +++++++++++++++++++++++++++++ 1 file changed, 119 insertions(+) create mode 100644 vendor/golang.org/x/net/ipv4/sys_asmreq.go (limited to 'vendor/golang.org/x/net/ipv4/sys_asmreq.go') diff --git a/vendor/golang.org/x/net/ipv4/sys_asmreq.go b/vendor/golang.org/x/net/ipv4/sys_asmreq.go new file mode 100644 index 0000000..0388cba --- /dev/null +++ b/vendor/golang.org/x/net/ipv4/sys_asmreq.go @@ -0,0 +1,119 @@ +// Copyright 2012 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. + +// +build darwin dragonfly freebsd netbsd openbsd solaris windows + +package ipv4 + +import ( + "net" + "unsafe" + + "golang.org/x/net/internal/socket" +) + +func (so *sockOpt) setIPMreq(c *socket.Conn, ifi *net.Interface, grp net.IP) error { + mreq := ipMreq{Multiaddr: [4]byte{grp[0], grp[1], grp[2], grp[3]}} + if err := setIPMreqInterface(&mreq, ifi); err != nil { + return err + } + b := (*[sizeofIPMreq]byte)(unsafe.Pointer(&mreq))[:sizeofIPMreq] + return so.Set(c, b) +} + +func (so *sockOpt) getMulticastIf(c *socket.Conn) (*net.Interface, error) { + var b [4]byte + if _, err := so.Get(c, b[:]); err != nil { + return nil, err + } + ifi, err := netIP4ToInterface(net.IPv4(b[0], b[1], b[2], b[3])) + if err != nil { + return nil, err + } + return ifi, nil +} + +func (so *sockOpt) setMulticastIf(c *socket.Conn, ifi *net.Interface) error { + ip, err := netInterfaceToIP4(ifi) + if err != nil { + return err + } + var b [4]byte + copy(b[:], ip) + return so.Set(c, b[:]) +} + +func setIPMreqInterface(mreq *ipMreq, ifi *net.Interface) error { + if ifi == nil { + return nil + } + ifat, err := ifi.Addrs() + if err != nil { + return err + } + for _, ifa := range ifat { + switch ifa := ifa.(type) { + case *net.IPAddr: + if ip := ifa.IP.To4(); ip != nil { + copy(mreq.Interface[:], ip) + return nil + } + case *net.IPNet: + if ip := ifa.IP.To4(); ip != nil { + copy(mreq.Interface[:], ip) + return nil + } + } + } + return errNoSuchInterface +} + +func netIP4ToInterface(ip net.IP) (*net.Interface, error) { + ift, err := net.Interfaces() + if err != nil { + return nil, err + } + for _, ifi := range ift { + ifat, err := ifi.Addrs() + if err != nil { + return nil, err + } + for _, ifa := range ifat { + switch ifa := ifa.(type) { + case *net.IPAddr: + if ip.Equal(ifa.IP) { + return &ifi, nil + } + case *net.IPNet: + if ip.Equal(ifa.IP) { + return &ifi, nil + } + } + } + } + return nil, errNoSuchInterface +} + +func netInterfaceToIP4(ifi *net.Interface) (net.IP, error) { + if ifi == nil { + return net.IPv4zero.To4(), nil + } + ifat, err := ifi.Addrs() + if err != nil { + return nil, err + } + for _, ifa := range ifat { + switch ifa := ifa.(type) { + case *net.IPAddr: + if ip := ifa.IP.To4(); ip != nil { + return ip, nil + } + case *net.IPNet: + if ip := ifa.IP.To4(); ip != nil { + return ip, nil + } + } + } + return nil, errNoSuchInterface +} -- cgit v1.2.3