# HG changeset patch
# User Roman Arutyunyan <arut@nginx.com>
# Date 1652856132 -14400
# Wed May 18 10:42:12 2022 +0400
# Branch quic
# Node ID a0f2d69f1fe43dfc718262235bf04d7b05f1fd68
# Parent 67ae4b649f2e38a44b245b7a842cf396c8250f02
QUIC: init_streams() callback.

It's called after handshake completion to initialize application-level data
prior to creating streams.

HTTP/3 callback implementation switches main QUIC connection to idle and
reusable modes and sets keepalive timer.

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 +28,9 @@
#define NGX_QUIC_STREAM_UNIDIRECTIONAL 0x02


+typedef ngx_int_t (*ngx_quic_init_streams_pt)(ngx_connection_t *c);
+
+
typedef enum {
NGX_QUIC_STREAM_SEND_READY = 0,
NGX_QUIC_STREAM_SEND_SEND,
@@ -74,6 +77,8 @@ typedef struct {
ngx_int_t stream_reject_code_uni;
ngx_int_t stream_reject_code_bidi;

+ ngx_quic_init_streams_pt init_streams;
+
u_char av_token_key[NGX_QUIC_AV_KEY_LEN];
u_char sr_token_key[NGX_QUIC_SR_KEY_LEN];
} ngx_quic_conf_t;
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);
@@ -571,15 +572,22 @@ 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;
@@ -588,6 +596,12 @@ ngx_quic_init_streams_handler(ngx_connec

qc = ngx_quic_get_connection(c);

+ if (qc->conf->init_streams) {
+ if (qc->conf->init_streams(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))
@@ -597,6 +611,8 @@ 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
@@ -17,21 +17,15 @@ 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;

- 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;
}
@@ -42,16 +36,16 @@ 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->keepalive.cancelable = 1;

- 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;
}
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
@@ -153,6 +153,7 @@ struct ngx_http_v3_session_s {

void ngx_http_v3_init(ngx_connection_t *c);
void ngx_http_v3_reset_connection(ngx_connection_t *c);
+ngx_int_t ngx_http_v3_init_streams(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);

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 +249,8 @@ 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_streams = ngx_http_v3_init_streams;
+
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
@@ -93,11 +93,6 @@ ngx_http_v3_init(ngx_connection_t *c)
}
#endif

- 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);

@@ -107,6 +102,43 @@ ngx_http_v3_init(ngx_connection_t *c)
}


+ngx_int_t
+ngx_http_v3_init_streams(ngx_connection_t *c)
+{
+ ngx_http_v3_session_t *h3c;
+ ngx_http_connection_t *hc;
+ ngx_http_v3_srv_conf_t *h3scf;
+ ngx_http_core_loc_conf_t *clcf;
+
+ if (ngx_terminate || ngx_exiting) {
+ return NGX_ERROR;
+ }
+
+ hc = c->data;
+
+ h3scf = ngx_http_get_module_srv_conf(hc->conf_ctx, ngx_http_v3_module);
+
+#if (NGX_HTTP_V3_HQ)
+ if (h3scf->hq) {
+ return NGX_OK;
+ }
+#endif
+
+ if (ngx_http_v3_init_session(c) != NGX_OK) {
+ return NGX_ERROR;
+ }
+
+ c->idle = 1;
+ ngx_reusable_connection(c, 1);
+
+ 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);
+
+ return NGX_OK;
+}
+
+
#if (NGX_HTTP_V3_HQ)

static void

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