#ifndef __NET_GENERIC_NETLINK_H#define __NET_GENERIC_NETLINK_H #include <linux/genetlink.h>#include <net/netlink.h> /** * struct genl_family - generic netlink family * @id: protocol family idenfitier * @hdrsize: length of user specific header in bytes * @name: name of family * @version: protocol version * @maxattr: maximum number of attributes supported * @attrbuf: buffer to store parsed attributes * @ops_list: list of all assigned operations * @family_list: family list */struct genl_family{	unsigned int		id;	unsigned int		hdrsize;	char			name[GENL_NAMSIZ];	unsigned int		version;	unsigned int		maxattr;	struct nlattr **	attrbuf;	/* private */	struct list_head	ops_list;	/* private */	struct list_head	family_list;	/* private */}; #define GENL_ADMIN_PERM		0x01 /** * struct genl_info - receiving information * @snd_seq: sending sequence number * @snd_pid: netlink pid of sender * @nlhdr: netlink message header * @genlhdr: generic netlink message header * @userhdr: user specific header * @attrs: netlink attributes */struct genl_info{	u32			snd_seq;	u32			snd_pid;	struct nlmsghdr *	nlhdr;	struct genlmsghdr *	genlhdr;	void *			userhdr;	struct nlattr **	attrs;}; /** * struct genl_ops - generic netlink operations * @cmd: command identifier * @flags: flags * @policy: attribute validation policy * @doit: standard command callback * @dumpit: callback for dumpers * @ops_list: operations list */struct genl_ops{	u8			cmd;	unsigned int		flags;	struct nla_policy	*policy;	int		       (*doit)(struct sk_buff *skb,				       struct genl_info *info);	int		       (*dumpit)(struct sk_buff *skb,					 struct netlink_callback *cb);	struct list_head	ops_list;}; extern int genl_register_family(struct genl_family *family);extern int genl_unregister_family(struct genl_family *family);extern int genl_register_ops(struct genl_family *, struct genl_ops *ops);extern int genl_unregister_ops(struct genl_family *, struct genl_ops *ops); extern struct sock *genl_sock; /** * genlmsg_put - Add generic netlink header to netlink message * @skb: socket buffer holding the message * @pid: netlink pid the message is addressed to * @seq: sequence number (usually the one of the sender) * @type: netlink message type * @hdrlen: length of the user specific header * @flags netlink message flags * @cmd: generic netlink command * @version: version * * Returns pointer to user specific header */static inline void *genlmsg_put(struct sk_buff *skb, u32 pid, u32 seq,				int type, int hdrlen, int flags,				u8 cmd, u8 version){	struct nlmsghdr *nlh;	struct genlmsghdr *hdr; 	nlh = nlmsg_put(skb, pid, seq, type, GENL_HDRLEN + hdrlen, flags);	if (nlh == NULL)		return NULL; 	hdr = nlmsg_data(nlh);	hdr->cmd = cmd;	hdr->version = version;	hdr->reserved = 0; 	return (char *) hdr + GENL_HDRLEN;} /** * genlmsg_end - Finalize a generic netlink message * @skb: socket buffer the message is stored in * @hdr: user specific header */static inline int genlmsg_end(struct sk_buff *skb, void *hdr){	return nlmsg_end(skb, hdr - GENL_HDRLEN - NLMSG_HDRLEN);} /** * genlmsg_cancel - Cancel construction of a generic netlink message * @skb: socket buffer the message is stored in * @hdr: generic netlink message header */static inline int genlmsg_cancel(struct sk_buff *skb, void *hdr){	return nlmsg_cancel(skb, hdr - GENL_HDRLEN - NLMSG_HDRLEN);} /** * genlmsg_multicast - multicast a netlink message * @skb: netlink message as socket buffer * @pid: own netlink pid to avoid sending to yourself * @group: multicast group id */static inline int genlmsg_multicast(struct sk_buff *skb, u32 pid,				    unsigned int group){	return nlmsg_multicast(genl_sock, skb, pid, group);} /** * genlmsg_unicast - unicast a netlink message * @skb: netlink message as socket buffer * @pid: netlink pid of the destination socket */static inline int genlmsg_unicast(struct sk_buff *skb, u32 pid){	return nlmsg_unicast(genl_sock, skb, pid);} #endif	/* __NET_GENERIC_NETLINK_H */