windows: allow calling WSASendto with nil Sockaddr
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>
diff --git a/windows/syscall_windows.go b/windows/syscall_windows.go
index 3f2cbb6..5f4f043 100644
--- a/windows/syscall_windows.go
+++ b/windows/syscall_windows.go
@@ -1115,9 +1115,13 @@
}
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)
}
