#define MAX_LINKS 32
-struct net;
+struct sockaddr_nl {
+ sa_family_t nl_family; /* AF_NETLINK */
+ unsigned short nl_pad; /* zero */
+ __u32 nl_pid; /* port ID */
+ __u32 nl_groups; /* multicast groups mask */
+};
+
+struct nlmsghdr {
+ __u32 nlmsg_len; /* Length of message including header */
+ __u16 nlmsg_type; /* Message content */
+ __u16 nlmsg_flags; /* Additional flags */
+ __u32 nlmsg_seq; /* Sequence number */
+ __u32 nlmsg_pid; /* Sending process port ID */
+};
+
+/* Flags values */
+
+#define NLM_F_REQUEST 1 /* It is request message. */
+#define NLM_F_MULTI 2 /* Multipart message, terminated by NLMSG_DONE */
+#define NLM_F_ACK 4 /* Reply with ack, with zero or error code */
+#define NLM_F_ECHO 8 /* Echo this request */
+/* Modifiers to GET request */
+#define NLM_F_ROOT 0x100 /* specify tree root */
+#define NLM_F_MATCH 0x200 /* return all matching */
+#define NLM_F_ATOMIC 0x400 /* atomic GET */
+#define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH)
+
+/* Modifiers to NEW request */
+#define NLM_F_REPLACE 0x100 /* Override existing */
+#define NLM_F_EXCL 0x200 /* Do not touch, if it exists */
+#define NLM_F_CREATE 0x400 /* Create, if it does not exist */
+#define NLM_F_APPEND 0x800 /* Add to end of list */
+
+/*
+ 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL
+ 4.4BSD CHANGE NLM_F_REPLACE
+
+ True CHANGE NLM_F_CREATE|NLM_F_REPLACE
+ Append NLM_F_CREATE
+ Check NLM_F_EXCL
+ */
+
+#define NLMSG_ALIGNTO 4U
+#define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) )
+#define NLMSG_HDRLEN ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr)))
#define NLMSG_LENGTH(len) ((len)+NLMSG_ALIGN(NLMSG_HDRLEN))
#define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len))
#define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0)))
(nlh)->nlmsg_len <= (len))
#define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len)))
+#define NLMSG_NOOP 0x1 /* Nothing. */
+#define NLMSG_ERROR 0x2 /* Error */
+#define NLMSG_DONE 0x3 /* End of a dump */
+#define NLMSG_OVERRUN 0x4 /* Data lost */
+
+#define NLMSG_MIN_TYPE 0x10 /* < 0x10: reserved control messages */
+
+struct nlmsgerr {
+ int error;
+ struct nlmsghdr msg;
+};
+
#define NETLINK_ADD_MEMBERSHIP 1
#define NETLINK_DROP_MEMBERSHIP 2
#define NETLINK_PKTINFO 3
#define NETLINK_BROADCAST_ERROR 4
#define NETLINK_NO_ENOBUFS 5
+struct nl_pktinfo {
+ __u32 group;
+};
+
#define NET_MAJOR 36 /* Major 36 is reserved for networking */
enum {
NETLINK_CONNECTED,
};
+/*
+ * <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)-->
+ * +---------------------+- - -+- - - - - - - - - -+- - -+
+ * | Header | Pad | Payload | Pad |
+ * | (struct nlattr) | ing | | ing |
+ * +---------------------+- - -+- - - - - - - - - -+- - -+
+ * <-------------- nlattr->nla_len -------------->
+ */
+
+struct nlattr {
+ __u16 nla_len;
+ __u16 nla_type;
+};
+
+/*
+ * nla_type (16 bits)
+ * +---+---+-------------------------------+
+ * | N | O | Attribute Type |
+ * +---+---+-------------------------------+
+ * N := Carries nested attributes
+ * O := Payload stored in network byte order
+ *
+ * Note: The N and O flag are mutually exclusive.
+ */
+#define NLA_F_NESTED (1 << 15)
+#define NLA_F_NET_BYTEORDER (1 << 14)
+#define NLA_TYPE_MASK ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER)
+
+#define NLA_ALIGNTO 4
+#define NLA_ALIGN(len) (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1))
+#define NLA_HDRLEN ((int) NLA_ALIGN(sizeof(struct nlattr)))
+
+#ifdef __KERNEL__
+
+#include <linux/capability.h>
+#include <linux/skbuff.h>
+
+struct net;
+
+static inline struct nlmsghdr *nlmsg_hdr(const struct sk_buff *skb)
+{
+ return (struct nlmsghdr *)skb->data;
+}
+
+struct netlink_skb_parms {
+ struct ucred creds; /* Skb credentials */
+ __u32 pid;
+ __u32 dst_group;
+ kernel_cap_t eff_cap;
+ __u32 loginuid; /* Login (audit) uid */
+ __u32 sessionid; /* Session id (audit) */
+ __u32 sid; /* SELinux security id */
+};
+
+#define NETLINK_CB(skb) (*(struct netlink_skb_parms*)&((skb)->cb))
+#define NETLINK_CREDS(skb) (&NETLINK_CB((skb)).creds)
+
+
+extern void netlink_table_grab(void);
+extern void netlink_table_ungrab(void);
+
+extern struct sock *netlink_kernel_create(struct net *net,
+ int unit,unsigned int groups,
+ void (*input)(struct sk_buff *skb),
+ struct mutex *cb_mutex,
+ struct module *module);
+extern void netlink_kernel_release(struct sock *sk);
+extern int __netlink_change_ngroups(struct sock *sk, unsigned int groups);
+extern int netlink_change_ngroups(struct sock *sk, unsigned int groups);
+extern void __netlink_clear_multicast_users(struct sock *sk, unsigned int group);
+extern void netlink_clear_multicast_users(struct sock *sk, unsigned int group);
+extern void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err);
+extern int netlink_has_listeners(struct sock *sk, unsigned int group);
+extern int netlink_unicast(struct sock *ssk, struct sk_buff *skb, __u32 pid, int nonblock);
+extern int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, __u32 pid,
+ __u32 group, gfp_t allocation);
+extern int netlink_broadcast_filtered(struct sock *ssk, struct sk_buff *skb,
+ __u32 pid, __u32 group, gfp_t allocation,
+ int (*filter)(struct sock *dsk, struct sk_buff *skb, void *data),
+ void *filter_data);
+extern int netlink_set_err(struct sock *ssk, __u32 pid, __u32 group, int code);
+extern int netlink_register_notifier(struct notifier_block *nb);
+extern int netlink_unregister_notifier(struct notifier_block *nb);
+
+/* finegrained unicast helpers: */
+struct sock *netlink_getsockbyfilp(struct file *filp);
+int netlink_attachskb(struct sock *sk, struct sk_buff *skb,
+ long *timeo, struct sock *ssk);
+void netlink_detachskb(struct sock *sk, struct sk_buff *skb);
+int netlink_sendskb(struct sock *sk, struct sk_buff *skb);
+
+/*
+ * skb should fit one page. This choice is good for headerless malloc.
+ * But we should limit to 8K so that userspace does not have to
+ * use enormous buffer sizes on recvmsg() calls just to avoid
+ * MSG_TRUNC when PAGE_SIZE is very large.
+ */
+#if PAGE_SIZE < 8192UL
+#define NLMSG_GOODSIZE SKB_WITH_OVERHEAD(PAGE_SIZE)
+#else
+#define NLMSG_GOODSIZE SKB_WITH_OVERHEAD(8192UL)
+#endif
+
+#define NLMSG_DEFAULT_SIZE (NLMSG_GOODSIZE - NLMSG_HDRLEN)
+
+
+struct netlink_callback {
+ struct sk_buff *skb;
+ const struct nlmsghdr *nlh;
+ int (*dump)(struct sk_buff * skb,
+ struct netlink_callback *cb);
+ int (*done)(struct netlink_callback *cb);
+ int family;
+ long args[6];
+};
+
+struct netlink_notify {
+ struct net *net;
+ int pid;
+ int protocol;
+};
+
+static __inline__ struct nlmsghdr *
+__nlmsg_put(struct sk_buff *skb, u32 pid, u32 seq, int type, int len, int flags)
+{
+ struct nlmsghdr *nlh;
+ int size = NLMSG_LENGTH(len);
+
+ nlh = (struct nlmsghdr*)skb_put(skb, NLMSG_ALIGN(size));
+ nlh->nlmsg_type = type;
+ nlh->nlmsg_len = size;
+ nlh->nlmsg_flags = flags;
+ nlh->nlmsg_pid = pid;
+ nlh->nlmsg_seq = seq;
+ if (!__builtin_constant_p(size) || NLMSG_ALIGN(size) - size != 0)
+ memset(NLMSG_DATA(nlh) + len, 0, NLMSG_ALIGN(size) - size);
+ return nlh;
+}
+
+#define NLMSG_NEW(skb, pid, seq, type, len, flags) \
+({ if (unlikely(skb_tailroom(skb) < (int)NLMSG_SPACE(len))) \
+ goto nlmsg_failure; \
+ __nlmsg_put(skb, pid, seq, type, len, flags); })
+
+#define NLMSG_PUT(skb, pid, seq, type, len) \
+ NLMSG_NEW(skb, pid, seq, type, len, 0)
+
+extern int netlink_dump_start(struct sock *ssk, struct sk_buff *skb,
+ const struct nlmsghdr *nlh,
+ int (*dump)(struct sk_buff *skb, struct netlink_callback*),
+ int (*done)(struct netlink_callback*));
+
+
+#define NL_NONROOT_RECV 0x1
+#define NL_NONROOT_SEND 0x2
+extern void netlink_set_nonroot(int protocol, unsigned flag);
+
+#endif /* __KERNEL__ */
+
#endif /* __LINUX_NETLINK_H */
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