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1272bf9dcd
On FreeBSD 11.3 or 12 kernel running COMPAT_FREEBSD32, it looks like the system call recvmsg always returns an incorrect length for the out-of-band data. This change adjusts the length when it looks incorrect and the running kernel is FreeBSD 11.3 or above. Fixes golang/go#30899. Change-Id: Ia58d8b4bd4caf3783d2e38161ee4afd1a64ca522 Reviewed-on: https://go-review.googlesource.com/c/net/+/168297 Run-TryBot: Mikio Hara <mikioh.public.networking@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
53 lines
1.2 KiB
Go
53 lines
1.2 KiB
Go
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build darwin freebsd linux solaris
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package ipv4
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import (
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"net"
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"unsafe"
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"golang.org/x/net/internal/socket"
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)
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func (so *sockOpt) setGroupReq(c *socket.Conn, ifi *net.Interface, grp net.IP) error {
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var gr groupReq
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if ifi != nil {
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gr.Interface = uint32(ifi.Index)
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}
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gr.setGroup(grp)
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var b []byte
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if compatFreeBSD32 {
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var d [sizeofGroupReq + 4]byte
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s := (*[sizeofGroupReq]byte)(unsafe.Pointer(&gr))
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copy(d[:4], s[:4])
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copy(d[8:], s[4:])
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b = d[:]
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} else {
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b = (*[sizeofGroupReq]byte)(unsafe.Pointer(&gr))[:sizeofGroupReq]
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}
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return so.Set(c, b)
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}
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func (so *sockOpt) setGroupSourceReq(c *socket.Conn, ifi *net.Interface, grp, src net.IP) error {
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var gsr groupSourceReq
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if ifi != nil {
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gsr.Interface = uint32(ifi.Index)
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}
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gsr.setSourceGroup(grp, src)
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var b []byte
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if compatFreeBSD32 {
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var d [sizeofGroupSourceReq + 4]byte
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s := (*[sizeofGroupSourceReq]byte)(unsafe.Pointer(&gsr))
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copy(d[:4], s[:4])
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copy(d[8:], s[4:])
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b = d[:]
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} else {
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b = (*[sizeofGroupSourceReq]byte)(unsafe.Pointer(&gsr))[:sizeofGroupSourceReq]
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}
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return so.Set(c, b)
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}
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