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/*
* Copyright (C) Roman Arutyunyan
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
static void ngx_http_v3_keepalive_handler(ngx_event_t *ev);
static void ngx_http_v3_cleanup_session(void *data);
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;
#if (NGX_HTTP_V3_HQ)
ngx_http_v3_srv_conf_t *h3scf;
#endif
pc = c->quic->parent;
hc = pc->data;
if (hc->v3_session) {
return NGX_OK;
}
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 init session");
h3c = ngx_pcalloc(pc->pool, sizeof(ngx_http_v3_session_t));
if (h3c == NULL) {
goto failed;
}
h3c->max_push_id = (uint64_t) -1;
h3c->goaway_push_id = (uint64_t) -1;
#if (NGX_HTTP_V3_HQ)
h3scf = ngx_http_get_module_srv_conf(hc->conf_ctx, ngx_http_v3_module);
if (h3scf->hq) {
h3c->hq = 1;
}
#endif
ngx_queue_init(&h3c->blocked);
ngx_queue_init(&h3c->pushing);
h3c->keepalive.log = pc->log;
h3c->keepalive.data = pc;
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.handler = ngx_http_v3_inc_insert_count_handler;
cln = ngx_pool_cleanup_add(pc->pool, 0);
if (cln == NULL) {
goto failed;
}
cln->handler = ngx_http_v3_cleanup_session;
cln->data = h3c;
hc->v3_session = h3c;
#if (NGX_HTTP_V3_HQ)
if (h3c->hq) {
return NGX_OK;
}
#endif
return ngx_http_v3_send_settings(c);
failed:
ngx_log_error(NGX_LOG_ERR, c->log, 0, "failed to create http3 session");
ngx_http_v3_finalize_connection(c, NGX_HTTP_V3_ERR_INTERNAL_ERROR,
"failed to create http3 session");
return NGX_ERROR;
}
static void
ngx_http_v3_keepalive_handler(ngx_event_t *ev)
{
ngx_connection_t *c;
c = ev->data;
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 keepalive handler");
ngx_http_v3_finalize_connection(c, NGX_HTTP_V3_ERR_NO_ERROR,
"keepalive timeout");
}
static void
ngx_http_v3_cleanup_session(void *data)
{
ngx_http_v3_session_t *h3c = data;
ngx_http_v3_cleanup_table(h3c);
if (h3c->keepalive.timer_set) {
ngx_del_timer(&h3c->keepalive);
}
if (h3c->table.send_insert_count.posted) {
ngx_delete_posted_event(&h3c->table.send_insert_count);
}
}
ngx_int_t
ngx_http_v3_check_flood(ngx_connection_t *c)
{
ngx_http_v3_session_t *h3c;
h3c = ngx_http_v3_get_session(c);
if (h3c->total_bytes / 8 > h3c->payload_bytes + 1048576) {
ngx_log_error(NGX_LOG_INFO, c->log, 0, "http3 flood detected");
ngx_http_v3_finalize_connection(c, NGX_HTTP_V3_ERR_NO_ERROR,
"HTTP/3 flood detected");
return NGX_ERROR;
}
return NGX_OK;
}
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