# HG changeset patch
# User Sergey Kandaurov <pluknet@nginx.com>
# Date 1638881391 -10800
# Node ID e06283038ec892dbe401e740abb458e2557e911c
# Parent  e4952530e6af47dc4a038fad194fe849961b9fc5
QUIC: clear SSL_OP_ENABLE_MIDDLEBOX_COMPAT on SSL context switch.

The SSL_OP_ENABLE_MIDDLEBOX_COMPAT option is provided by QuicTLS and enabled
by default in the newly created SSL contexts.  SSL_set_quic_method() is used
to clear it, which is required for SSL handshake to work on QUIC connections.
Switching context in the ngx_http_ssl_servername() SNI callback overrides SSL
options from the new SSL context.  This results in the option set again.
Fix is to explicitly clear it when switching to another SSL context.

Initially reported here (in Russian):
http://mailman.nginx.org/pipermail/nginx-ru/2021-November/063989.html

diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c
--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -954,6 +954,14 @@ ngx_http_ssl_servername(ngx_ssl_conn_t *
 #ifdef SSL_OP_NO_RENEGOTIATION
         SSL_set_options(ssl_conn, SSL_OP_NO_RENEGOTIATION);
 #endif
+
+#ifdef SSL_OP_ENABLE_MIDDLEBOX_COMPAT
+#if (NGX_HTTP_QUIC)
+        if (c->listening->quic) {
+            SSL_clear_options(ssl_conn, SSL_OP_ENABLE_MIDDLEBOX_COMPAT);
+        }
+#endif
+#endif
     }
 
 done: