[PATCH 1 of 2] QUIC: resized input datagram buffer from 65535 to 65527

[Roman Arutyunyan]

# HG changeset patch
# User Roman Arutyunyan <arut at nginx.com>
# Date 1683784174 -14400
#      Thu May 11 09:49:34 2023 +0400
# Branch quic
# Node ID d2cc7adb261edc92988411ac7e0c8059419c201d
# Parent  d565cf69ff5d82d76011fdd8af03ae42b2cb145b
QUIC: resized input datagram buffer from 65535 to 65527.

The value of 65527 is the maximum permitted UDP payload size.

diff --git a/src/event/quic/ngx_event_quic_udp.c b/src/event/quic/ngx_event_quic_udp.c
--- a/src/event/quic/ngx_event_quic_udp.c
+++ b/src/event/quic/ngx_event_quic_udp.c
@@ -34,7 +34,7 @@ ngx_quic_recvmsg(ngx_event_t *ev)
     ngx_event_conf_t   *ecf;
     ngx_connection_t   *c, *lc;
     ngx_quic_socket_t  *qsock;
-    static u_char       buffer[65535];
+    static u_char       buffer[NGX_QUIC_MAX_UDP_PAYLOAD_SIZE];
 
 #if (NGX_HAVE_ADDRINFO_CMSG)
     u_char             msg_control[CMSG_SPACE(sizeof(ngx_addrinfo_t))];