gotosocial/vendor/golang.org/x/net/ipv4/control_pktinfo.go
dependabot[bot] 5c17ecd93a
[chore]: Bump golang.org/x/net from 0.17.0 to 0.18.0 (#2390)
Bumps [golang.org/x/net](https://github.com/golang/net) from 0.17.0 to 0.18.0.
- [Commits](https://github.com/golang/net/compare/v0.17.0...v0.18.0)

---
updated-dependencies:
- dependency-name: golang.org/x/net
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
2023-11-27 13:59:07 +01:00

42 lines
980 B
Go

// Copyright 2014 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.
//go:build darwin || linux || solaris
package ipv4
import (
"net"
"unsafe"
"golang.org/x/net/internal/iana"
"golang.org/x/net/internal/socket"
"golang.org/x/sys/unix"
)
func marshalPacketInfo(b []byte, cm *ControlMessage) []byte {
m := socket.ControlMessage(b)
m.MarshalHeader(iana.ProtocolIP, unix.IP_PKTINFO, sizeofInetPktinfo)
if cm != nil {
pi := (*inetPktinfo)(unsafe.Pointer(&m.Data(sizeofInetPktinfo)[0]))
if ip := cm.Src.To4(); ip != nil {
copy(pi.Spec_dst[:], ip)
}
if cm.IfIndex > 0 {
pi.setIfindex(cm.IfIndex)
}
}
return m.Next(sizeofInetPktinfo)
}
func parsePacketInfo(cm *ControlMessage, b []byte) {
pi := (*inetPktinfo)(unsafe.Pointer(&b[0]))
cm.IfIndex = int(pi.Ifindex)
if len(cm.Dst) < net.IPv4len {
cm.Dst = make(net.IP, net.IPv4len)
}
copy(cm.Dst, pi.Addr[:])
}