1 #ifndef __LINUX_NETLINK_H
2 #define __LINUX_NETLINK_H
4 #include <linux/socket.h> /* for sa_family_t */
5 #include <linux/types.h>
7 #define NETLINK_ROUTE 0 /* Routing/device hook */
8 #define NETLINK_W1 1 /* 1-wire subsystem */
9 #define NETLINK_USERSOCK 2 /* Reserved for user mode socket protocols */
10 #define NETLINK_FIREWALL 3 /* Firewalling hook */
11 #define NETLINK_INET_DIAG 4 /* INET socket monitoring */
12 #define NETLINK_NFLOG 5 /* netfilter/iptables ULOG */
13 #define NETLINK_XFRM 6 /* ipsec */
14 #define NETLINK_SELINUX 7 /* SELinux event notifications */
15 #define NETLINK_ISCSI 8 /* Open-iSCSI */
16 #define NETLINK_AUDIT 9 /* auditing */
17 #define NETLINK_FIB_LOOKUP 10
18 #define NETLINK_CONNECTOR 11
19 #define NETLINK_NETFILTER 12 /* netfilter subsystem */
20 #define NETLINK_IP6_FW 13
21 #define NETLINK_DNRTMSG 14 /* DECnet routing messages */
22 #define NETLINK_KOBJECT_UEVENT 15 /* Kernel messages to userspace */
23 #define NETLINK_GENERIC 16
29 sa_family_t nl_family; /* AF_NETLINK */
30 unsigned short nl_pad; /* zero */
31 __u32 nl_pid; /* process pid */
32 __u32 nl_groups; /* multicast groups mask */
37 __u32 nlmsg_len; /* Length of message including header */
38 __u16 nlmsg_type; /* Message content */
39 __u16 nlmsg_flags; /* Additional flags */
40 __u32 nlmsg_seq; /* Sequence number */
41 __u32 nlmsg_pid; /* Sending process PID */
46 #define NLM_F_REQUEST 1 /* It is request message. */
47 #define NLM_F_MULTI 2 /* Multipart message, terminated by NLMSG_DONE */
48 #define NLM_F_ACK 4 /* Reply with ack, with zero or error code */
49 #define NLM_F_ECHO 8 /* Echo this request */
51 /* Modifiers to GET request */
52 #define NLM_F_ROOT 0x100 /* specify tree root */
53 #define NLM_F_MATCH 0x200 /* return all matching */
54 #define NLM_F_ATOMIC 0x400 /* atomic GET */
55 #define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH)
57 /* Modifiers to NEW request */
58 #define NLM_F_REPLACE 0x100 /* Override existing */
59 #define NLM_F_EXCL 0x200 /* Do not touch, if it exists */
60 #define NLM_F_CREATE 0x400 /* Create, if it does not exist */
61 #define NLM_F_APPEND 0x800 /* Add to end of list */
64 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL
65 4.4BSD CHANGE NLM_F_REPLACE
67 True CHANGE NLM_F_CREATE|NLM_F_REPLACE
72 #define NLMSG_ALIGNTO 4
73 #define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) )
74 #define NLMSG_HDRLEN ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr)))
75 #define NLMSG_LENGTH(len) ((len)+NLMSG_ALIGN(NLMSG_HDRLEN))
76 #define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len))
77 #define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0)))
78 #define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \
79 (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len)))
80 #define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \
81 (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \
82 (nlh)->nlmsg_len <= (len))
83 #define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len)))
85 #define NLMSG_NOOP 0x1 /* Nothing. */
86 #define NLMSG_ERROR 0x2 /* Error */
87 #define NLMSG_DONE 0x3 /* End of a dump */
88 #define NLMSG_OVERRUN 0x4 /* Data lost */
90 #define NLMSG_MIN_TYPE 0x10 /* < 0x10: reserved control messages */
98 #define NETLINK_ADD_MEMBERSHIP 1
99 #define NETLINK_DROP_MEMBERSHIP 2
100 #define NETLINK_PKTINFO 3
107 #define NET_MAJOR 36 /* Major 36 is reserved for networking */
110 NETLINK_UNCONNECTED = 0,
115 * <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)-->
116 * +---------------------+- - -+- - - - - - - - - -+- - -+
117 * | Header | Pad | Payload | Pad |
118 * | (struct nlattr) | ing | | ing |
119 * +---------------------+- - -+- - - - - - - - - -+- - -+
120 * <-------------- nlattr->nla_len -------------->
129 #define NLA_ALIGNTO 4
130 #define NLA_ALIGN(len) (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1))
131 #define NLA_HDRLEN ((int) NLA_ALIGN(sizeof(struct nlattr)))
134 #endif /* __LINUX_NETLINK_H */