netdev implementation for FreeBSD

[sliver-openvswitch.git] / lib / rtbsd.h

diff --git a/lib/rtbsd.h b/lib/rtbsd.h
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+/*
+ * Copyright (c) 2011 Gaetano Catalli.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef RTBSD_H
+#define RTBSD_H 1
+
+#include "list.h"
+
+/*
+ * A digested version of a message received from a PF_ROUTE socket which
+ * indicates that a network device has been created or destroyed or changed.
+ */
+struct rtbsd_change {
+    /* Copied from struct if_msghdr. */
+    int msg_type;             /* e.g. XXX. */
+
+    /* Copied from struct if_msghdr. */
+    int if_index;              /* Index of network device. */
+
+    char if_name[IF_NAMESIZE];         /* Name of network device. */
+    int master_ifindex;         /* Ifindex of datapath master (0 if none). */
+};
+
+/*
+ * Function called to report that a netdev has changed.  'change' describes the
+ * specific change.  It may be null if the buffer of change information
+ * overflowed, in which case the function must assume that every device may
+ * have changed.  'aux' is as specified in the call to
+ * rtbsd_notifier_register().
+ */
+typedef void rtbsd_notify_func(const struct rtbsd_change *, void *aux);
+
+struct rtbsd_notifier {
+    struct list node;
+    rtbsd_notify_func *cb;
+    void *aux;
+};
+
+int rtbsd_notifier_register(struct rtbsd_notifier *,
+                                rtbsd_notify_func *, void *aux);
+void rtbsd_notifier_unregister(struct rtbsd_notifier *);
+void rtbsd_notifier_run(void);
+void rtbsd_notifier_wait(void);
+
+#endif /* rtbsd.h */