| #ifndef __LINUX_NETLINK_H |
| #define __LINUX_NETLINK_H |
| |
| #include <linux/socket.h> /* for sa_family_t */ |
| #include <linux/types.h> |
| |
| #define NETLINK_ROUTE 0 /* Routing/device hook */ |
| #define NETLINK_UNUSED 1 /* Unused number */ |
| #define NETLINK_USERSOCK 2 /* Reserved for user mode socket protocols */ |
| #define NETLINK_FIREWALL 3 /* Firewalling hook */ |
| #define NETLINK_INET_DIAG 4 /* INET socket monitoring */ |
| #define NETLINK_NFLOG 5 /* netfilter/iptables ULOG */ |
| #define NETLINK_XFRM 6 /* ipsec */ |
| #define NETLINK_SELINUX 7 /* SELinux event notifications */ |
| #define NETLINK_ISCSI 8 /* Open-iSCSI */ |
| #define NETLINK_AUDIT 9 /* auditing */ |
| #define NETLINK_FIB_LOOKUP 10 |
| #define NETLINK_CONNECTOR 11 |
| #define NETLINK_NETFILTER 12 /* netfilter subsystem */ |
| #define NETLINK_IP6_FW 13 |
| #define NETLINK_DNRTMSG 14 /* DECnet routing messages */ |
| #define NETLINK_KOBJECT_UEVENT 15 /* Kernel messages to userspace */ |
| #define NETLINK_GENERIC 16 |
| /* leave room for NETLINK_DM (DM Events) */ |
| #define NETLINK_SCSITRANSPORT 18 /* SCSI Transports */ |
| #define NETLINK_ECRYPTFS 19 |
| |
| #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 4 |
| #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))) |
| #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) >= (int)sizeof(struct nlmsghdr) && \ |
| (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 */ |
| |
| #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 |
| |
| struct nl_pktinfo |
| { |
| __u32 group; |
| }; |
| |
| #define NET_MAJOR 36 /* Major 36 is reserved for networking */ |
| |
| enum { |
| NETLINK_UNCONNECTED = 0, |
| 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))) |
| |
| |
| #endif /* __LINUX_NETLINK_H */ |