gotosocial/vendor/golang.org/x/net/ipv4/control_unix.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

76 lines
1.7 KiB
Go

// 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.
//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
package ipv4
import (
"unsafe"
"golang.org/x/net/internal/iana"
"golang.org/x/net/internal/socket"
"golang.org/x/sys/unix"
)
func setControlMessage(c *socket.Conn, opt *rawOpt, cf ControlFlags, on bool) error {
opt.Lock()
defer opt.Unlock()
if so, ok := sockOpts[ssoReceiveTTL]; ok && cf&FlagTTL != 0 {
if err := so.SetInt(c, boolint(on)); err != nil {
return err
}
if on {
opt.set(FlagTTL)
} else {
opt.clear(FlagTTL)
}
}
if so, ok := sockOpts[ssoPacketInfo]; ok {
if cf&(FlagSrc|FlagDst|FlagInterface) != 0 {
if err := so.SetInt(c, boolint(on)); err != nil {
return err
}
if on {
opt.set(cf & (FlagSrc | FlagDst | FlagInterface))
} else {
opt.clear(cf & (FlagSrc | FlagDst | FlagInterface))
}
}
} else {
if so, ok := sockOpts[ssoReceiveDst]; ok && cf&FlagDst != 0 {
if err := so.SetInt(c, boolint(on)); err != nil {
return err
}
if on {
opt.set(FlagDst)
} else {
opt.clear(FlagDst)
}
}
if so, ok := sockOpts[ssoReceiveInterface]; ok && cf&FlagInterface != 0 {
if err := so.SetInt(c, boolint(on)); err != nil {
return err
}
if on {
opt.set(FlagInterface)
} else {
opt.clear(FlagInterface)
}
}
}
return nil
}
func marshalTTL(b []byte, cm *ControlMessage) []byte {
m := socket.ControlMessage(b)
m.MarshalHeader(iana.ProtocolIP, unix.IP_RECVTTL, 1)
return m.Next(1)
}
func parseTTL(cm *ControlMessage, b []byte) {
cm.TTL = int(*(*byte)(unsafe.Pointer(&b[:1][0])))
}