[PATCH 4 of 4] HTTP/3: insert count block timeout

[Roman Arutyunyan]

# HG changeset patch
# User Roman Arutyunyan <arut at nginx.com>
# Date 1672931002 -14400
#      Thu Jan 05 19:03:22 2023 +0400
# Branch quic
# Node ID 7dac46ecb27d3f488d40b28cd8d07f884046e171
# Parent  7358ff656a6b124166926c026a13ec3057b6db6b
HTTP/3: insert count block timeout.

Previously, there was no timeout for a request stream blocked on insert count,
which could result in infinite wait.  Now client_header_timeout is set when
stream is first blocked.

diff --git a/src/http/v3/ngx_http_v3_request.c b/src/http/v3/ngx_http_v3_request.c
--- a/src/http/v3/ngx_http_v3_request.c
+++ b/src/http/v3/ngx_http_v3_request.c
@@ -558,6 +558,12 @@ ngx_http_v3_process_request(ngx_event_t 
                 break;
             }
 
+            if (!rev->timer_set) {
+                cscf = ngx_http_get_module_srv_conf(r,
+                                                    ngx_http_core_module);
+                ngx_add_timer(rev, cscf->client_header_timeout);
+            }
+
             if (ngx_handle_read_event(rev, 0) != NGX_OK) {
                 ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
             }