# HG changeset patch
# User Vladimir Homutov <vl@nginx.com>
# Date 1617104023 -10800
# Node ID 385d511b50641957dc09f8345d9ca3aab72ed982
# Parent  db58c7ef1d7c2d994c8345e21c8e04c0d7dba586
QUIC: fixed udp buffer initialization.

The start field is used to check if the QUIC packet is first in the datagram.
This fixes stateless reset detection.

diff --git a/src/event/ngx_event_udp.c b/src/event/ngx_event_udp.c
--- a/src/event/ngx_event_udp.c
+++ b/src/event/ngx_event_udp.c
@@ -279,6 +279,8 @@ ngx_event_recvmsg(ngx_event_t *ev)
 
             buf.pos = buffer;
             buf.last = buffer + n;
+            buf.start = buf.pos;
+            buf.end = buffer + sizeof(buffer);
 
             rev = c->read;