unix: allow calling Sendto with nil Sockaddr
Same as CL 433504 did for the syscall package.
For golang/go#55845
Change-Id: I3ca2d7fab9da77c304487b4c134a9675da99deca
Reviewed-on: https://go-review.googlesource.com/c/sys/+/434515
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
diff --git a/unix/syscall_unix.go b/unix/syscall_unix.go
index 9f75356..00bafda 100644
--- a/unix/syscall_unix.go
+++ b/unix/syscall_unix.go
@@ -423,11 +423,15 @@
}
func Sendto(fd int, p []byte, flags int, to Sockaddr) (err error) {
- ptr, n, err := to.sockaddr()
- if err != nil {
- return err
+ var ptr unsafe.Pointer
+ var salen _Socklen
+ if to != nil {
+ ptr, salen, err = to.sockaddr()
+ if err != nil {
+ return err
+ }
}
- return sendto(fd, p, flags, ptr, n)
+ return sendto(fd, p, flags, ptr, salen)
}
func SetsockoptByte(fd, level, opt int, value byte) (err error) {
