[PATCH] Windows Bindings: handler for WSAEMSGSIZE added to avoid stop receiving data

[PATCH] Windows Bindings: handler for WSAEMSGSIZE added to avoid stop receiving data

[Sascha Dierberg]

From: Sascha Dierberg <dierberg@dresearch-fe.de>

Signed-off-by: Sascha Dierberg <dierberg@dresearch-fe.de>
---
 conn/bind_windows.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/conn/bind_windows.go b/conn/bind_windows.go
index fdd1c24..e78bef9 100644
--- a/conn/bind_windows.go
+++ b/conn/bind_windows.go
@@ -389,6 +389,10 @@ func (bind *afWinRingBind) Receive(buf []byte,
isOpen *uint32) (int, Endpoint, e
  if err != nil {
  return 0, nil, err
  }
+ // WSAEMSGSIZE message too long error on Winsock2
+ if results[0].Status == 10040 {
+ return 0, nil, nil
+ }
  if results[0].Status != 0 {
  return 0, nil, windows.Errno(results[0].Status)
  }
-- 
2.31.1

Re: [PATCH] Windows Bindings: handler for WSAEMSGSIZE added to avoid stop receiving data

[Jason A. Donenfeld]

Thanks for the patch. That's a nice bug you found.

I fixed things slightly differently, but mentioned you in the commit:
https://git.zx2c4.com/wireguard-go/commit/?id=8246d251ea9b9cbef07082bd69280a8f988cec0c

Re: [PATCH] Windows Bindings: handler for WSAEMSGSIZE added to avoid stop receiving data

[Sascha Dierberg]

Hello Jason,

your bugfix works fine for jumbo packets but not if the Windows socket
is flooded with  " nc -u <IP-Addr:port>  < /dev/urandom ".

best regards - Sascha

Am Di., 27. Apr. 2021 um 04:10 Uhr schrieb Jason A. Donenfeld <Jason@zx2c4.com>:
>
> Thanks for the patch. That's a nice bug you found.
>
> I fixed things slightly differently, but mentioned you in the commit:
> https://git.zx2c4.com/wireguard-go/commit/?id=8246d251ea9b9cbef07082bd69280a8f988cec0c



-- 
Sascha Dierberg
Karl-Marx-Allee 61
D-10243 Berlin
mailto:sascha@dierberg.de
Phone: +49 178 3727242
Fax: +49 30 42019631

Re: [PATCH] Windows Bindings: handler for WSAEMSGSIZE added to avoid stop receiving data

[Jason A. Donenfeld]

Hi Sascha,

Oh, boy, that's embarrassing. Fixed here:
https://git.zx2c4.com/wireguard-go/commit/?id=5846b622837e04dbc35b153d9ceda7fd66397520

Thanks again for the report.

Jason