Using message queue to send commands from cli thread to bgp thread.

1 files changed, 83 insertions, 0 deletions

diff --git a/lib/command_queue.c b/lib/command_queue.c
new file mode 100644
index 00000000..a74398c3
--- /dev/null
+++ b/lib/command_queue.c
@@ -0,0 +1,83 @@
+/* Command Message Queue
+ * Copyright (C) 2009 Chris Hall (GMCH), Highwayman
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2, or (at your
+ * option) any later version.
+ *
+ * GNU Zebra is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Zebra; see the file COPYING.  If not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <zebra.h>
+
+#include "mqueue.h"
+#include "qpnexus.h"
+#include "memory.h"
+#include "command_queue.h"
+
+/* Prototypes */
+static void cq_action(mqueue_block mqb);
+
+/* We have too many parameters for a message queue block so have to marshal */
+struct marshal
+{
+  struct cmd_element *matched_element;
+  struct vty *vty;
+  int argc;
+  char **argv;
+};
+
+void
+cq_enqueue(struct cmd_element *matched_element, struct vty *vty,
+    int argc, const char *argv[], qpn_nexus bgp_nexus)
+{
+  struct marshal *wyatt = XCALLOC(MTYPE_MARSHAL, sizeof(struct marshal)) ;
+  int i;
+  mqueue_block mqb = NULL;
+
+  wyatt->matched_element = matched_element;
+  wyatt->vty = vty;
+  wyatt->argc = argc;
+  wyatt->argv = XCALLOC(MTYPE_MARSHAL, sizeof (char*) * argc);
+  for (i = 0; i < argc; ++i)
+    {
+      wyatt->argv[i] = XSTRDUP(MTYPE_MARSHAL, argv[i]);
+    }
+
+  mqb = mqb_init_new(mqb, cq_action, 0) ;
+  mqb_set_arg0_p(mqb, wyatt);
+  mqueue_enqueue(bgp_nexus->queue, mqb, 0) ;
+}
+
+/* dispatch a command from the message queue block */
+static void
+cq_action(mqueue_block mqb)
+{
+  int result;
+  int i;
+  struct marshal *wyatt = mqb_get_arg0_p(mqb);
+
+  /* Execute matched command. */
+  result = (*wyatt->matched_element->func)
+       (wyatt->matched_element, wyatt->vty, wyatt->argc, wyatt->argv);
+
+  /* clean up */
+  for (i = 0; i< wyatt->argc; ++i)
+    {
+      XFREE(MTYPE_MARSHAL, wyatt->argv[i]);
+    }
+  XFREE(MTYPE_MARSHAL, wyatt->argv);
+  XFREE(MTYPE_MARSHAL, wyatt);
+  mqb_free(mqb);
+}