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windows: allow calling WSASendto with nil Sockaddr

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Same as CL 434535 did for the syscall package.

For golang/go#55845

Change-Id: I17f30152ae973b64ac65e08cefd5442e9bf19e2c
Reviewed-on: https://go-review.googlesource.com/c/sys/+/435777
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Benny Siegert <bsiegert@gmail.com>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Benny Siegert <bsiegert@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
This commit is contained in:
Tobias Klauser
2022-09-28 12:47:23 +02:00
committed by Gopher Robot
parent c57c793909
commit 6fa7a7ca2b
1 changed files with 7 additions and 3 deletions
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10
windows/syscall_windows.go
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@@ -1115,9 +1115,13 @@ func Shutdown(fd Handle, how int) (err error) {
}
func WSASendto(s Handle, bufs *WSABuf, bufcnt uint32, sent *uint32, flags uint32, to Sockaddr, overlapped *Overlapped, croutine *byte) (err error) {
rsa, l, err := to.sockaddr()
if err != nil {
return err
var rsa unsafe.Pointer
var l int32
if to != nil {
rsa, l, err = to.sockaddr()
if err != nil {
return err
}
}
return WSASendTo(s, bufs, bufcnt, sent, flags, (*RawSockaddrAny)(unsafe.Pointer(rsa)), l, overlapped, croutine)
}