discover: Allow discover server to receive boot messages

Currently, the petitboot socket is one way: messages are only sent from
server to client.

Beause we want the clients to trigger a boot, this change allows the
server to receive messages on the petitboot socket. This is just a
matter of adding a waiter to the client-specific socket, then handling
incoming messages.

At present we don't do anything with the messages, but we'll add a
handler later.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

1 files changed, 24 insertions, 2 deletions

diff --git a/discover/discover-server.c b/discover/discover-server.c
index 21e15da..bafcb77 100644
--- a/discover/discover-server.c
+++ b/discover/discover-server.c
@@ -126,7 +126,26 @@ static int write_remove_message(struct discover_server *server,
 	return client_write_message(server, client, message);
 }
 
-static int discover_server_process(void *arg)
+static int discover_server_process_message(void *arg)
+{
+	struct pb_protocol_message *message;
+	struct client *client = arg;
+
+	message = pb_protocol_read_message(client, client->fd);
+
+	if (!message)
+		return 0;
+
+	if (message->action != PB_PROTOCOL_ACTION_BOOT) {
+		pb_log("%s: invalid action %d\n", __func__, message->action);
+		return 0;
+	}
+
+	/* todo: process boot message */
+	return 0;
+}
+
+static int discover_server_process_connection(void *arg)
 {
 	struct discover_server *server = arg;
 	struct client *client;
@@ -156,6 +175,9 @@ static int discover_server_process(void *arg)
 		write_add_message(server, client, device);
 	}
 
+	waiter_register(server->waitset, client->fd, WAIT_IN,
+			discover_server_process_message, client);
+
 	return 0;
 }
 
@@ -222,7 +244,7 @@ struct discover_server *discover_server_init(struct waitset *waitset)
 	}
 
 	server->waiter = waiter_register(server->waitset, server->socket,
-			WAIT_IN, discover_server_process, server);
+			WAIT_IN, discover_server_process_connection, server);
 
 	return server;