mirror of
https://github.com/golang/net.git
synced 2026-03-31 02:17:08 +09:00
d23d9bc549
Done with: go get go@1.18 go mod tidy go fix ./... Using go1.21.3. With a manual change to keep golang.org/x/net/context testing itself, not context in the standard library. For golang/go#60268. Change-Id: I00682bf7cf1e3ba4370e2a3e7f63dc245b294a36 Reviewed-on: https://go-review.googlesource.com/c/net/+/534241 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Reviewed-by: Damien Neil <dneil@google.com> Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
76 lines
1.7 KiB
Go
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])))
|
|
}
|