LXR linux/include/uapi/linux/netlink.h

   1#ifndef _UAPI__LINUX_NETLINK_H
   2#define _UAPI__LINUX_NETLINK_H
   3
   4#include <linux/kernel.h>
   5#include <linux/socket.h> /* for __kernel_sa_family_t */
   6#include <linux/types.h>
   7
   8#define NETLINK_ROUTE           0       /* Routing/device hook                          */
   9#define NETLINK_UNUSED          1       /* Unused number                                */
  10#define NETLINK_USERSOCK        2       /* Reserved for user mode socket protocols      */
  11#define NETLINK_FIREWALL        3       /* Unused number, formerly ip_queue             */
  12#define NETLINK_SOCK_DIAG       4       /* socket monitoring                            */
  13#define NETLINK_NFLOG           5       /* netfilter/iptables ULOG */
  14#define NETLINK_XFRM            6       /* ipsec */
  15#define NETLINK_SELINUX         7       /* SELinux event notifications */
  16#define NETLINK_ISCSI           8       /* Open-iSCSI */
  17#define NETLINK_AUDIT           9       /* auditing */
  18#define NETLINK_FIB_LOOKUP      10      
  19#define NETLINK_CONNECTOR       11
  20#define NETLINK_NETFILTER       12      /* netfilter subsystem */
  21#define NETLINK_IP6_FW          13
  22#define NETLINK_DNRTMSG         14      /* DECnet routing messages */
  23#define NETLINK_KOBJECT_UEVENT  15      /* Kernel messages to userspace */
  24#define NETLINK_GENERIC         16
  25/* leave room for NETLINK_DM (DM Events) */
  26#define NETLINK_SCSITRANSPORT   18      /* SCSI Transports */
  27#define NETLINK_ECRYPTFS        19
  28#define NETLINK_RDMA            20
  29#define NETLINK_CRYPTO          21      /* Crypto layer */
  30
  31#define NETLINK_INET_DIAG       NETLINK_SOCK_DIAG
  32
  33#define MAX_LINKS 32            
  34
  35struct sockaddr_nl {
  36        __kernel_sa_family_t    nl_family;      /* AF_NETLINK   */
  37        unsigned short  nl_pad;         /* zero         */
  38        __u32           nl_pid;         /* port ID      */
  39        __u32           nl_groups;      /* multicast groups mask */
  40};
  41
  42struct nlmsghdr {
  43        __u32           nlmsg_len;      /* Length of message including header */
  44        __u16           nlmsg_type;     /* Message content */
  45        __u16           nlmsg_flags;    /* Additional flags */
  46        __u32           nlmsg_seq;      /* Sequence number */
  47        __u32           nlmsg_pid;      /* Sending process port ID */
  48};
  49
  50/* Flags values */
  51
  52#define NLM_F_REQUEST           1       /* It is request message.       */
  53#define NLM_F_MULTI             2       /* Multipart message, terminated by NLMSG_DONE */
  54#define NLM_F_ACK               4       /* Reply with ack, with zero or error code */
  55#define NLM_F_ECHO              8       /* Echo this request            */
  56#define NLM_F_DUMP_INTR         16      /* Dump was inconsistent due to sequence change */
  57#define NLM_F_DUMP_FILTERED     32      /* Dump was filtered as requested */
  58
  59/* Modifiers to GET request */
  60#define NLM_F_ROOT      0x100   /* specify tree root    */
  61#define NLM_F_MATCH     0x200   /* return all matching  */
  62#define NLM_F_ATOMIC    0x400   /* atomic GET           */
  63#define NLM_F_DUMP      (NLM_F_ROOT|NLM_F_MATCH)
  64
  65/* Modifiers to NEW request */
  66#define NLM_F_REPLACE   0x100   /* Override existing            */
  67#define NLM_F_EXCL      0x200   /* Do not touch, if it exists   */
  68#define NLM_F_CREATE    0x400   /* Create, if it does not exist */
  69#define NLM_F_APPEND    0x800   /* Add to end of list           */
  70
  71/*
  72   4.4BSD ADD           NLM_F_CREATE|NLM_F_EXCL
  73   4.4BSD CHANGE        NLM_F_REPLACE
  74
  75   True CHANGE          NLM_F_CREATE|NLM_F_REPLACE
  76   Append               NLM_F_CREATE
  77   Check                NLM_F_EXCL
  78 */
  79
  80#define NLMSG_ALIGNTO   4U
  81#define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) )
  82#define NLMSG_HDRLEN     ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr)))
  83#define NLMSG_LENGTH(len) ((len) + NLMSG_HDRLEN)
  84#define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len))
  85#define NLMSG_DATA(nlh)  ((void*)(((char*)nlh) + NLMSG_LENGTH(0)))
  86#define NLMSG_NEXT(nlh,len)      ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \
  87                                  (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len)))
  88#define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \
  89                           (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \
  90                           (nlh)->nlmsg_len <= (len))
  91#define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len)))
  92
  93#define NLMSG_NOOP              0x1     /* Nothing.             */
  94#define NLMSG_ERROR             0x2     /* Error                */
  95#define NLMSG_DONE              0x3     /* End of a dump        */
  96#define NLMSG_OVERRUN           0x4     /* Data lost            */
  97
  98#define NLMSG_MIN_TYPE          0x10    /* < 0x10: reserved control messages */
  99
 100struct nlmsgerr {
 101        int             error;
 102        struct nlmsghdr msg;
 103};
 104
 105#define NETLINK_ADD_MEMBERSHIP          1
 106#define NETLINK_DROP_MEMBERSHIP         2
 107#define NETLINK_PKTINFO                 3
 108#define NETLINK_BROADCAST_ERROR         4
 109#define NETLINK_NO_ENOBUFS              5
 110#ifndef __KERNEL__
 111#define NETLINK_RX_RING                 6
 112#define NETLINK_TX_RING                 7
 113#endif
 114#define NETLINK_LISTEN_ALL_NSID         8
 115#define NETLINK_LIST_MEMBERSHIPS        9
 116#define NETLINK_CAP_ACK                 10
 117
 118struct nl_pktinfo {
 119        __u32   group;
 120};
 121
 122struct nl_mmap_req {
 123        unsigned int    nm_block_size;
 124        unsigned int    nm_block_nr;
 125        unsigned int    nm_frame_size;
 126        unsigned int    nm_frame_nr;
 127};
 128
 129struct nl_mmap_hdr {
 130        unsigned int    nm_status;
 131        unsigned int    nm_len;
 132        __u32           nm_group;
 133        /* credentials */
 134        __u32           nm_pid;
 135        __u32           nm_uid;
 136        __u32           nm_gid;
 137};
 138
 139#ifndef __KERNEL__
 140enum nl_mmap_status {
 141        NL_MMAP_STATUS_UNUSED,
 142        NL_MMAP_STATUS_RESERVED,
 143        NL_MMAP_STATUS_VALID,
 144        NL_MMAP_STATUS_COPY,
 145        NL_MMAP_STATUS_SKIP,
 146};
 147
 148#define NL_MMAP_MSG_ALIGNMENT           NLMSG_ALIGNTO
 149#define NL_MMAP_MSG_ALIGN(sz)           __ALIGN_KERNEL(sz, NL_MMAP_MSG_ALIGNMENT)
 150#define NL_MMAP_HDRLEN                  NL_MMAP_MSG_ALIGN(sizeof(struct nl_mmap_hdr))
 151#endif
 152
 153#define NET_MAJOR 36            /* Major 36 is reserved for networking                                          */
 154
 155enum {
 156        NETLINK_UNCONNECTED = 0,
 157        NETLINK_CONNECTED,
 158};
 159
 160/*
 161 *  <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)-->
 162 * +---------------------+- - -+- - - - - - - - - -+- - -+
 163 * |        Header       | Pad |     Payload       | Pad |
 164 * |   (struct nlattr)   | ing |                   | ing |
 165 * +---------------------+- - -+- - - - - - - - - -+- - -+
 166 *  <-------------- nlattr->nla_len -------------->
 167 */
 168
 169struct nlattr {
 170        __u16           nla_len;
 171        __u16           nla_type;
 172};
 173
 174/*
 175 * nla_type (16 bits)
 176 * +---+---+-------------------------------+
 177 * | N | O | Attribute Type                |
 178 * +---+---+-------------------------------+
 179 * N := Carries nested attributes
 180 * O := Payload stored in network byte order
 181 *
 182 * Note: The N and O flag are mutually exclusive.
 183 */
 184#define NLA_F_NESTED            (1 << 15)
 185#define NLA_F_NET_BYTEORDER     (1 << 14)
 186#define NLA_TYPE_MASK           ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER)
 187
 188#define NLA_ALIGNTO             4
 189#define NLA_ALIGN(len)          (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1))
 190#define NLA_HDRLEN              ((int) NLA_ALIGN(sizeof(struct nlattr)))
 191
 192
 193#endif /* _UAPI__LINUX_NETLINK_H */
 194