From a85edfeef6cdf4094e6e12b663b7371271cb610f Mon Sep 17 00:00:00 2001 From: Valentin Bartenev Date: Tue, 19 Jul 2016 20:34:17 +0300 Subject: [PATCH] HTTP/2: flushing of the SSL buffer in transition to the idle state. It fixes potential connection leak if some unsent data was left in the SSL buffer. Particularly, that could happen when a client canceled the stream after the HEADERS frame has already been created. In this case no other frames might be produced and the HEADERS frame alone didn't flush the buffer. --- src/http/v2/ngx_http_v2.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/src/http/v2/ngx_http_v2.c b/src/http/v2/ngx_http_v2.c index 292f430a7..d0cd2ab79 100644 --- a/src/http/v2/ngx_http_v2.c +++ b/src/http/v2/ngx_http_v2.c @@ -599,7 +599,8 @@ error: static void ngx_http_v2_handle_connection(ngx_http_v2_connection_t *h2c) { - ngx_connection_t *c; + ngx_int_t rc; + ngx_connection_t *c; ngx_http_v2_srv_conf_t *h2scf; if (h2c->last_out || h2c->processing) { @@ -614,7 +615,22 @@ ngx_http_v2_handle_connection(ngx_http_v2_connection_t *h2c) } if (c->buffered) { - return; + h2c->blocked = 1; + + rc = ngx_http_v2_send_output_queue(h2c); + + h2c->blocked = 0; + + if (rc == NGX_ERROR) { + ngx_http_close_connection(c); + return; + } + + if (rc == NGX_AGAIN) { + return; + } + + /* rc == NGX_OK */ } h2scf = ngx_http_get_module_srv_conf(h2c->http_connection->conf_ctx,