# HG changeset patch
# User Roman Arutyunyan <arut@nginx.com>
# Date 1669798275 -14400
# Node ID b0c2234aaa9f01ab2cb8cac9f56cd0d8479cbaba
# Parent  7b83da3bdf9f92934ef99b1b2ab6a5f7990cd98e
QUIC: application init() callback.

It's called after handshake completion or prior to the first early data stream
creation.  The callback should initialize application-level data before
creating streams.

HTTP/3 callback implementation sets keepalive timer and sends SETTINGS.

Also, this allows to limit max handshake time in ngx_http_v3_init_stream().

diff --git a/src/event/quic/ngx_event_quic.h b/src/event/quic/ngx_event_quic.h
--- a/src/event/quic/ngx_event_quic.h
+++ b/src/event/quic/ngx_event_quic.h
@@ -28,6 +28,7 @@
 #define NGX_QUIC_STREAM_UNIDIRECTIONAL       0x02
 
 
+typedef ngx_int_t (*ngx_quic_init_pt)(ngx_connection_t *c);
 typedef void (*ngx_quic_shutdown_pt)(ngx_connection_t *c);
 
 
@@ -77,6 +78,7 @@ typedef struct {
     ngx_int_t                      stream_reject_code_uni;
     ngx_int_t                      stream_reject_code_bidi;
 
+    ngx_quic_init_pt               init;
     ngx_quic_shutdown_pt           shutdown;
 
     u_char                         av_token_key[NGX_QUIC_AV_KEY_LEN];
diff --git a/src/event/quic/ngx_event_quic_streams.c b/src/event/quic/ngx_event_quic_streams.c
--- a/src/event/quic/ngx_event_quic_streams.c
+++ b/src/event/quic/ngx_event_quic_streams.c
@@ -21,6 +21,7 @@ static ngx_quic_stream_t *ngx_quic_get_s
 static ngx_int_t ngx_quic_reject_stream(ngx_connection_t *c, uint64_t id);
 static void ngx_quic_init_stream_handler(ngx_event_t *ev);
 static void ngx_quic_init_streams_handler(ngx_connection_t *c);
+static ngx_int_t ngx_quic_do_init_streams(ngx_connection_t *c);
 static ngx_quic_stream_t *ngx_quic_create_stream(ngx_connection_t *c,
     uint64_t id);
 static void ngx_quic_empty_handler(ngx_event_t *ev);
@@ -555,15 +556,22 @@ ngx_quic_init_streams(ngx_connection_t *
         return NGX_OK;
     }
 
-    ngx_quic_init_streams_handler(c);
-
-    return NGX_OK;
+    return ngx_quic_do_init_streams(c);
 }
 
 
 static void
 ngx_quic_init_streams_handler(ngx_connection_t *c)
 {
+    if (ngx_quic_do_init_streams(c) != NGX_OK) {
+        ngx_quic_close_connection(c, NGX_ERROR);
+    }
+}
+
+
+static ngx_int_t
+ngx_quic_do_init_streams(ngx_connection_t *c)
+{
     ngx_queue_t            *q;
     ngx_quic_stream_t      *qs;
     ngx_quic_connection_t  *qc;
@@ -572,6 +580,12 @@ ngx_quic_init_streams_handler(ngx_connec
 
     qc = ngx_quic_get_connection(c);
 
+    if (qc->conf->init) {
+        if (qc->conf->init(c) != NGX_OK) {
+            return NGX_ERROR;
+        }
+    }
+
     for (q = ngx_queue_head(&qc->streams.uninitialized);
          q != ngx_queue_sentinel(&qc->streams.uninitialized);
          q = ngx_queue_next(q))
@@ -581,6 +595,8 @@ ngx_quic_init_streams_handler(ngx_connec
     }
 
     qc->streams.initialized = 1;
+
+    return NGX_OK;
 }
 
 
diff --git a/src/http/v3/ngx_http_v3.c b/src/http/v3/ngx_http_v3.c
--- a/src/http/v3/ngx_http_v3.c
+++ b/src/http/v3/ngx_http_v3.c
@@ -17,7 +17,6 @@ static void ngx_http_v3_cleanup_session(
 ngx_int_t
 ngx_http_v3_init_session(ngx_connection_t *c)
 {
-    ngx_connection_t        *pc;
     ngx_pool_cleanup_t      *cln;
     ngx_http_connection_t   *hc;
     ngx_http_v3_session_t   *h3c;
@@ -25,16 +24,11 @@ ngx_http_v3_init_session(ngx_connection_
     ngx_http_v3_srv_conf_t  *h3scf;
 #endif
 
-    pc = c->quic->parent;
-    hc = pc->data;
-
-    if (hc->v3_session) {
-        return NGX_OK;
-    }
+    hc = c->data;
 
     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 init session");
 
-    h3c = ngx_pcalloc(pc->pool, sizeof(ngx_http_v3_session_t));
+    h3c = ngx_pcalloc(c->pool, sizeof(ngx_http_v3_session_t));
     if (h3c == NULL) {
         goto failed;
     }
@@ -52,15 +46,15 @@ ngx_http_v3_init_session(ngx_connection_
     ngx_queue_init(&h3c->blocked);
     ngx_queue_init(&h3c->pushing);
 
-    h3c->keepalive.log = pc->log;
-    h3c->keepalive.data = pc;
+    h3c->keepalive.log = c->log;
+    h3c->keepalive.data = c;
     h3c->keepalive.handler = ngx_http_v3_keepalive_handler;
 
-    h3c->table.send_insert_count.log = pc->log;
-    h3c->table.send_insert_count.data = pc;
+    h3c->table.send_insert_count.log = c->log;
+    h3c->table.send_insert_count.data = c;
     h3c->table.send_insert_count.handler = ngx_http_v3_inc_insert_count_handler;
 
-    cln = ngx_pool_cleanup_add(pc->pool, 0);
+    cln = ngx_pool_cleanup_add(c->pool, 0);
     if (cln == NULL) {
         goto failed;
     }
@@ -70,13 +64,7 @@ ngx_http_v3_init_session(ngx_connection_
 
     hc->v3_session = h3c;
 
-#if (NGX_HTTP_V3_HQ)
-    if (h3c->hq) {
-        return NGX_OK;
-    }
-#endif
-
-    return ngx_http_v3_send_settings(c);
+    return NGX_OK;
 
 failed:
 
diff --git a/src/http/v3/ngx_http_v3.h b/src/http/v3/ngx_http_v3.h
--- a/src/http/v3/ngx_http_v3.h
+++ b/src/http/v3/ngx_http_v3.h
@@ -159,6 +159,7 @@ void ngx_http_v3_init_stream(ngx_connect
 void ngx_http_v3_reset_stream(ngx_connection_t *c);
 ngx_int_t ngx_http_v3_init_session(ngx_connection_t *c);
 ngx_int_t ngx_http_v3_check_flood(ngx_connection_t *c);
+ngx_int_t ngx_http_v3_init(ngx_connection_t *c);
 void ngx_http_v3_shutdown(ngx_connection_t *c);
 
 ngx_int_t ngx_http_v3_read_request_body(ngx_http_request_t *r);
diff --git a/src/http/v3/ngx_http_v3_module.c b/src/http/v3/ngx_http_v3_module.c
--- a/src/http/v3/ngx_http_v3_module.c
+++ b/src/http/v3/ngx_http_v3_module.c
@@ -249,6 +249,7 @@ ngx_http_v3_create_srv_conf(ngx_conf_t *
     h3scf->quic.stream_reject_code_bidi = NGX_HTTP_V3_ERR_REQUEST_REJECTED;
     h3scf->quic.active_connection_id_limit = NGX_CONF_UNSET_UINT;
 
+    h3scf->quic.init = ngx_http_v3_init;
     h3scf->quic.shutdown = ngx_http_v3_shutdown;
 
     return h3scf;
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
@@ -57,18 +57,29 @@ static const struct {
 void
 ngx_http_v3_init_stream(ngx_connection_t *c)
 {
+    ngx_http_v3_session_t     *h3c;
     ngx_http_connection_t     *hc, *phc;
     ngx_http_v3_srv_conf_t    *h3scf;
     ngx_http_core_loc_conf_t  *clcf;
+    ngx_http_core_srv_conf_t  *cscf;
 
     hc = c->data;
 
     hc->ssl = 1;
 
     clcf = ngx_http_get_module_loc_conf(hc->conf_ctx, ngx_http_core_module);
+    cscf = ngx_http_get_module_srv_conf(hc->conf_ctx, ngx_http_core_module);
     h3scf = ngx_http_get_module_srv_conf(hc->conf_ctx, ngx_http_v3_module);
 
     if (c->quic == NULL) {
+        if (ngx_http_v3_init_session(c) != NGX_OK) {
+            ngx_http_close_connection(c);
+            return;
+        }
+
+        h3c = hc->v3_session;
+        ngx_add_timer(&h3c->keepalive, cscf->client_header_timeout);
+
         h3scf->quic.timeout = clcf->keepalive_timeout;
         ngx_quic_run(c, &h3scf->quic);
         return;
@@ -86,11 +97,6 @@ ngx_http_v3_init_stream(ngx_connection_t
         ngx_set_connection_log(c, clcf->error_log);
     }
 
-    if (ngx_http_v3_init_session(c) != NGX_OK) {
-        ngx_http_close_connection(c);
-        return;
-    }
-
     if (c->quic->id & NGX_QUIC_STREAM_UNIDIRECTIONAL) {
         ngx_http_v3_init_uni_stream(c);
 
@@ -100,6 +106,28 @@ ngx_http_v3_init_stream(ngx_connection_t
 }
 
 
+ngx_int_t
+ngx_http_v3_init(ngx_connection_t *c)
+{
+    ngx_http_v3_session_t     *h3c;
+    ngx_http_core_loc_conf_t  *clcf;
+
+    ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 init");
+
+    h3c = ngx_http_v3_get_session(c);
+    clcf = ngx_http_v3_get_module_loc_conf(c, ngx_http_core_module);
+    ngx_add_timer(&h3c->keepalive, clcf->keepalive_timeout);
+
+#if (NGX_HTTP_V3_HQ)
+    if (h3c->hq) {
+        return NGX_OK;
+    }
+#endif
+
+    return ngx_http_v3_send_settings(c);
+}
+
+
 void
 ngx_http_v3_shutdown(ngx_connection_t *c)
 {