netlink.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:5k
- #ifndef __LINUX_NETLINK_H
- #define __LINUX_NETLINK_H
- #define NETLINK_ROUTE 0 /* Routing/device hook */
- #define NETLINK_SKIP 1 /* Reserved for ENskip */
- #define NETLINK_USERSOCK 2 /* Reserved for user mode socket protocols */
- #define NETLINK_FIREWALL 3 /* Firewalling hook */
- #define NETLINK_TCPDIAG 4 /* TCP socket monitoring */
- #define NETLINK_NFLOG 5 /* netfilter/iptables ULOG */
- #define NETLINK_ARPD 8
- #define NETLINK_ROUTE6 11 /* af_inet6 route comm channel */
- #define NETLINK_IP6_FW 13
- #define NETLINK_DNRTMSG 14 /* DECnet routing messages */
- #define NETLINK_TAPBASE 16 /* 16 to 31 are ethertap */
- #define MAX_LINKS 32
- struct sockaddr_nl
- {
- sa_family_t nl_family; /* AF_NETLINK */
- unsigned short nl_pad; /* zero */
- __u32 nl_pid; /* process pid */
- __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 PID */
- };
- /* 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 4
- #define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) )
- #define NLMSG_LENGTH(len) ((len)+NLMSG_ALIGN(sizeof(struct nlmsghdr)))
- #define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len))
- #define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0)))
- #define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len),
- (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len)))
- #define NLMSG_OK(nlh,len) ((len) > 0 && (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) &&
- (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 */
- struct nlmsgerr
- {
- int error;
- struct nlmsghdr msg;
- };
- #define NET_MAJOR 36 /* Major 36 is reserved for networking */
- #ifdef __KERNEL__
- struct netlink_skb_parms
- {
- struct ucred creds; /* Skb credentials */
- __u32 pid;
- __u32 groups;
- __u32 dst_pid;
- __u32 dst_groups;
- kernel_cap_t eff_cap;
- };
- #define NETLINK_CB(skb) (*(struct netlink_skb_parms*)&((skb)->cb))
- #define NETLINK_CREDS(skb) (&NETLINK_CB((skb)).creds)
- extern int netlink_attach(int unit, int (*function)(int,struct sk_buff *skb));
- extern void netlink_detach(int unit);
- extern int netlink_post(int unit, struct sk_buff *skb);
- extern int init_netlink(void);
- extern struct sock *netlink_kernel_create(int unit, void (*input)(struct sock *sk, int len));
- extern void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err);
- extern int netlink_unicast(struct sock *ssk, struct sk_buff *skb, __u32 pid, int nonblock);
- extern void netlink_broadcast(struct sock *ssk, struct sk_buff *skb, __u32 pid,
- __u32 group, int allocation);
- extern void 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);
- /*
- * skb should fit one page. This choice is good for headerless malloc.
- *
- * FIXME: What is the best size for SLAB???? --ANK
- */
- #define NLMSG_GOODSIZE (PAGE_SIZE - ((sizeof(struct sk_buff)+0xF)&~0xF))
- struct netlink_callback
- {
- struct sk_buff *skb;
- struct nlmsghdr *nlh;
- int (*dump)(struct sk_buff * skb, struct netlink_callback *cb);
- int (*done)(struct netlink_callback *cb);
- int family;
- long args[4];
- };
- struct netlink_notify
- {
- int pid;
- int protocol;
- };
- static __inline__ struct nlmsghdr *
- __nlmsg_put(struct sk_buff *skb, u32 pid, u32 seq, int type, int len)
- {
- 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 = 0;
- nlh->nlmsg_pid = pid;
- nlh->nlmsg_seq = seq;
- return nlh;
- }
- #define NLMSG_PUT(skb, pid, seq, type, len)
- ({ if (skb_tailroom(skb) < (int)NLMSG_SPACE(len)) goto nlmsg_failure;
- __nlmsg_put(skb, pid, seq, type, len); })
- extern int netlink_dump_start(struct sock *ssk, struct sk_buff *skb,
- 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 */