/*
- * Copyright (c) 2008 Nicira Networks.
+ * Copyright (c) 2008, 2010, 2011 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
/* Netlink protocol definitions.
*
- * These definitions are equivalent to those in the Linux 2.6 kernel headers,
- * without requiring those headers to be available. */
+ * Netlink is a message framing format described in RFC 3549 and used heavily
+ * in Linux to access the network stack. Open vSwitch uses AF_NETLINK sockets
+ * for this purpose on Linux. But on all platforms, Open vSwitch uses Netlink
+ * message framing internally for certain purposes.
+ *
+ * This header provides access to the Netlink message framing definitions
+ * regardless of platform. On Linux, it includes the proper headers directly;
+ * on other platforms it directly defines the structures and macros itself.
+ */
#include <stdint.h>
#include <sys/socket.h>
#include "util.h"
+#ifdef HAVE_NETLINK
+#include <linux/netlink.h>
+#include <linux/genetlink.h>
+
+#else
#define NETLINK_GENERIC 16
struct sockaddr_nl {
};
BUILD_ASSERT_DECL(sizeof(struct nlmsgerr) == 20);
-#define NETLINK_ADD_MEMBERSHIP 1
-#define NETLINK_DROP_MEMBERSHIP 2
-#define NETLINK_PKTINFO 3
-
struct genlmsghdr {
uint8_t cmd;
uint8_t version;
};
#define CTRL_ATTR_OP_MAX (__CTRL_ATTR_OP_MAX - 1)
+#endif /* !HAVE_NETLINK */
+
+/* These were introduced all together in 2.6.24. */
+#ifndef NLA_TYPE_MASK
+#define NLA_F_NESTED (1 << 15)
+#define NLA_F_NET_BYTEORDER (1 << 14)
+#define NLA_TYPE_MASK ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER)
+#endif
+
+/* These were introduced all together in 2.6.14. (We want our programs to
+ * support the newer kernel features even if compiled with older headers.) */
+#ifndef NETLINK_ADD_MEMBERSHIP
+#define NETLINK_ADD_MEMBERSHIP 1
+#define NETLINK_DROP_MEMBERSHIP 2
+#endif
+
+/* These were introduced all together in 2.6.23. (We want our programs to
+ * support the newer kernel features even if compiled with older headers.) */
+#ifndef CTRL_ATTR_MCAST_GRP_MAX
+
+#undef CTRL_ATTR_MAX
+#define CTRL_ATTR_MAX 7
+#define CTRL_ATTR_MCAST_GROUPS 7
+
+enum {
+ CTRL_ATTR_MCAST_GRP_UNSPEC,
+ CTRL_ATTR_MCAST_GRP_NAME,
+ CTRL_ATTR_MCAST_GRP_ID,
+ __CTRL_ATTR_MCAST_GRP_MAX,
+};
+
+#define CTRL_ATTR_MCAST_GRP_MAX (__CTRL_ATTR_MCAST_GRP_MAX - 1)
+#endif /* CTRL_ATTR_MCAST_GRP_MAX */
#endif /* netlink-protocol.h */