MINOR: mux: add a "max_streams" method.

Add a new method to muxes, "max_streams", that returns the max number of
streams the mux can handle. This will be used to know if a mux is in use
or not.

include/types/connection.h

@@ -334,6 +334,7 @@ struct mux_ops {
 	int (*subscribe)(struct conn_stream *cs, int event_type, void *param); /* Subscribe to events, such as "being able to send" */
 	int (*unsubscribe)(struct conn_stream *cs, int event_type, void *param); /* Unsubscribe to events */
 	int (*avail_streams)(struct connection *conn); /* Returns the number of streams still available for a connection */
+	int (*max_streams)(struct connection *conn);   /* Returns the max number of streams available for that connection. */
 	void (*destroy)(struct connection *conn); /* Let the mux know one of its users left, so it may have to disappear */
 	const struct cs_info *(*get_cs_info)(struct conn_stream *cs); /* Return info on the specified conn_stream or NULL if not defined */
 	unsigned int flags;                           /* some flags characterizing the mux's capabilities (MX_FL_*) */
@@ -443,6 +444,7 @@ struct connection {
 		struct sockaddr_storage from;	/* client address, or address to spoof when connecting to the server */
 		struct sockaddr_storage to;	/* address reached by the client, or address to connect to */
 	} addr; /* addresses of the remote side, client for producer and server for consumer */
+	struct timeval idle_tv;                 /* Time the connection was added to the idle list */
 };
 
 /* PROTO token registration */

src/mux_h1.c

@@ -206,6 +206,10 @@ static int h1_avail_streams(struct connection *conn)
 	return h1c->h1s ? 0 : 1;
 }
 
+static int h1_max_streams(struct connection *conn)
+{
+	return 1;
+}
 
 /*****************************************************************/
 /* functions below are dedicated to the mux setup and management */
@@ -1981,6 +1985,7 @@ const struct mux_ops mux_h1_ops = {
 	.detach      = h1_detach,
 	.destroy     = h1_destroy,
 	.avail_streams = h1_avail_streams,
+	.max_streams = h1_max_streams,
 	.rcv_buf     = h1_rcv_buf,
 	.snd_buf     = h1_snd_buf,
 #if defined(CONFIG_HAP_LINUX_SPLICE)

src/mux_h2.c

@@ -347,9 +347,16 @@ static int h2_avail_streams(struct connection *conn)
 {
 	struct h2c *h2c = conn->mux_ctx;
 
+	/* XXX Should use the negociated max concurrent stream nb instead of the conf value */
 	return (h2_settings_max_concurrent_streams - h2c->nb_streams);
 }
 
+static int h2_max_streams(struct connection *conn)
+{
+	/* XXX Should use the negociated max concurrent stream nb instead of the conf value */
+	return h2_settings_max_concurrent_streams;
+}
+
 
 /*****************************************************************/
 /* functions below are dedicated to the mux setup and management */
@@ -4825,6 +4832,7 @@ static const struct mux_ops h2_ops = {
 	.detach = h2_detach,
 	.destroy = h2_destroy,
 	.avail_streams = h2_avail_streams,
+	.max_streams = h2_max_streams,
 	.shutr = h2_shutr,
 	.shutw = h2_shutw,
 	.show_fd = h2_show_fd,

src/mux_pt.c

@@ -198,6 +198,11 @@ static int mux_pt_avail_streams(struct connection *conn)
 	return (ctx->cs == NULL ? 1 : 0);
 }
 
+static int mux_pt_max_streams(struct connection *conn)
+{
+	return 1;
+}
+
 static void mux_pt_shutr(struct conn_stream *cs, enum cs_shr_mode mode)
 {
 	if (cs->flags & CS_FL_SHR)
@@ -311,6 +316,7 @@ const struct mux_ops mux_pt_ops = {
 	.get_first_cs = mux_pt_get_first_cs,
 	.detach = mux_pt_detach,
 	.avail_streams = mux_pt_avail_streams,
+	.max_streams = mux_pt_max_streams,
 	.destroy = mux_pt_destroy_meth,
 	.shutr = mux_pt_shutr,
 	.shutw = mux_pt_shutw,