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syscall: permit nil destination address in sendmsgN{Inet4,Inet6}

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For #74841

Change-Id: Ic3ef9c61a89bc8bc0594724a6d94eed91fb63eae
Reviewed-on: https://go-review.googlesource.com/c/go/+/692435
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
This commit is contained in:
database64128 2025-08-02 00:34:48 +08:00 • committed by Gopher Robot
parent a8564bd412
commit 3871c0d84d
1 changed files with 14 additions and 6 deletions
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20
src/syscall/syscall_unix.go
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@ -410,17 +410,25 @@ func SendmsgN(fd int, p, oob []byte, to Sockaddr, flags int) (n int, err error)
}
func sendmsgNInet4(fd int, p, oob []byte, to *SockaddrInet4, flags int) (n int, err error) {
ptr, salen, err := to.sockaddr()
if err != nil {
return 0, err
var ptr unsafe.Pointer
var salen _Socklen
if to != nil {
ptr, salen, err = to.sockaddr()
if err != nil {
return 0, err
}
}
return sendmsgN(fd, p, oob, ptr, salen, flags)
}
func sendmsgNInet6(fd int, p, oob []byte, to *SockaddrInet6, flags int) (n int, err error) {
ptr, salen, err := to.sockaddr()
if err != nil {
return 0, err
var ptr unsafe.Pointer
var salen _Socklen
if to != nil {
ptr, salen, err = to.sockaddr()
if err != nil {
return 0, err
}
}
return sendmsgN(fd, p, oob, ptr, salen, flags)
}