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unix: allow calling Sendto with nil Sockaddr

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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>
This commit is contained in:
Tobias Klauser
2022-09-26 16:36:19 +02:00
committed by Gopher Robot
parent fb04ddd9f9
commit 8cfa568d3c
1 changed files with 8 additions and 4 deletions
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12
unix/syscall_unix.go
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@@ -423,11 +423,15 @@ func Send(s int, buf []byte, flags int) (err error) {
}
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) {