netlink.h

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    1 #ifndef _UAPI__LINUX_NETLINK_H
    2 #define _UAPI__LINUX_NETLINK_H
    3 
    4 #include <linux/socket.h> /* for __kernel_sa_family_t */
    5 #include <linux/types.h>
    6 
    7 #define NETLINK_ROUTE           0       /* Routing/device hook                          */
    8 #define NETLINK_UNUSED          1       /* Unused number                                */
    9 #define NETLINK_USERSOCK        2       /* Reserved for user mode socket protocols      */
   10 #define NETLINK_FIREWALL        3       /* Unused number, formerly ip_queue             */
   11 #define NETLINK_SOCK_DIAG       4       /* 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
   24 /* leave room for NETLINK_DM (DM Events) */
   25 #define NETLINK_SCSITRANSPORT   18      /* SCSI Transports */
   26 #define NETLINK_ECRYPTFS        19
   27 #define NETLINK_RDMA            20
   28 #define NETLINK_CRYPTO          21      /* Crypto layer */
   29 
   30 #define NETLINK_INET_DIAG       NETLINK_SOCK_DIAG
   31 
   32 #define MAX_LINKS 32            
   33 
   34 struct sockaddr_nl {
   35         __kernel_sa_family_t    nl_family;      /* AF_NETLINK   */
   36         unsigned short  nl_pad;         /* zero         */
   37         __u32           nl_pid;         /* port ID      */
   38         __u32           nl_groups;      /* multicast groups mask */
   39 };
   40 
   41 struct nlmsghdr {
   42         __u32           nlmsg_len;      /* Length of message including header */
   43         __u16           nlmsg_type;     /* Message content */
   44         __u16           nlmsg_flags;    /* Additional flags */
   45         __u32           nlmsg_seq;      /* Sequence number */
   46         __u32           nlmsg_pid;      /* Sending process port ID */
   47 };
   48 
   49 /* Flags values */
   50 
   51 #define NLM_F_REQUEST           1       /* It is request message.       */
   52 #define NLM_F_MULTI             2       /* Multipart message, terminated by NLMSG_DONE */
   53 #define NLM_F_ACK               4       /* Reply with ack, with zero or error code */
   54 #define NLM_F_ECHO              8       /* Echo this request            */
   55 #define NLM_F_DUMP_INTR         16      /* Dump was inconsistent due to sequence change */
   56 
   57 /* Modifiers to GET request */
   58 #define NLM_F_ROOT      0x100   /* specify tree root    */
   59 #define NLM_F_MATCH     0x200   /* return all matching  */
   60 #define NLM_F_ATOMIC    0x400   /* atomic GET           */
   61 #define NLM_F_DUMP      (NLM_F_ROOT|NLM_F_MATCH)
   62 
   63 /* Modifiers to NEW request */
   64 #define NLM_F_REPLACE   0x100   /* Override existing            */
   65 #define NLM_F_EXCL      0x200   /* Do not touch, if it exists   */
   66 #define NLM_F_CREATE    0x400   /* Create, if it does not exist */
   67 #define NLM_F_APPEND    0x800   /* Add to end of list           */
   68 
   69 /*
   70    4.4BSD ADD           NLM_F_CREATE|NLM_F_EXCL
   71    4.4BSD CHANGE        NLM_F_REPLACE
   72 
   73    True CHANGE          NLM_F_CREATE|NLM_F_REPLACE
   74    Append               NLM_F_CREATE
   75    Check                NLM_F_EXCL
   76  */
   77 
   78 #define NLMSG_ALIGNTO   4U
   79 #define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) )
   80 #define NLMSG_HDRLEN     ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr)))
   81 #define NLMSG_LENGTH(len) ((len)+NLMSG_ALIGN(NLMSG_HDRLEN))
   82 #define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len))
   83 #define NLMSG_DATA(nlh)  ((void*)(((char*)nlh) + NLMSG_LENGTH(0)))
   84 #define NLMSG_NEXT(nlh,len)      ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \
   85                                   (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len)))
   86 #define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \
   87                            (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \
   88                            (nlh)->nlmsg_len <= (len))
   89 #define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len)))
   90 
   91 #define NLMSG_NOOP              0x1     /* Nothing.             */
   92 #define NLMSG_ERROR             0x2     /* Error                */
   93 #define NLMSG_DONE              0x3     /* End of a dump        */
   94 #define NLMSG_OVERRUN           0x4     /* Data lost            */
   95 
   96 #define NLMSG_MIN_TYPE          0x10    /* < 0x10: reserved control messages */
   97 
   98 struct nlmsgerr {
   99         int             error;
  100         struct nlmsghdr msg;
  101 };
  102 
  103 #define NETLINK_ADD_MEMBERSHIP  1
  104 #define NETLINK_DROP_MEMBERSHIP 2
  105 #define NETLINK_PKTINFO         3
  106 #define NETLINK_BROADCAST_ERROR 4
  107 #define NETLINK_NO_ENOBUFS      5
  108 
  109 struct nl_pktinfo {
  110         __u32   group;
  111 };
  112 
  113 #define NET_MAJOR 36            /* Major 36 is reserved for networking                                          */
  114 
  115 enum {
  116         NETLINK_UNCONNECTED = 0,
  117         NETLINK_CONNECTED,
  118 };
  119 
  120 /*
  121  *  <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)-->
  122  * +---------------------+- - -+- - - - - - - - - -+- - -+
  123  * |        Header       | Pad |     Payload       | Pad |
  124  * |   (struct nlattr)   | ing |                   | ing |
  125  * +---------------------+- - -+- - - - - - - - - -+- - -+
  126  *  <-------------- nlattr->nla_len -------------->
  127  */
  128 
  129 struct nlattr {
  130         __u16           nla_len;
  131         __u16           nla_type;
  132 };
  133 
  134 /*
  135  * nla_type (16 bits)
  136  * +---+---+-------------------------------+
  137  * | N | O | Attribute Type                |
  138  * +---+---+-------------------------------+
  139  * N := Carries nested attributes
  140  * O := Payload stored in network byte order
  141  *
  142  * Note: The N and O flag are mutually exclusive.
  143  */
  144 #define NLA_F_NESTED            (1 << 15)
  145 #define NLA_F_NET_BYTEORDER     (1 << 14)
  146 #define NLA_TYPE_MASK           ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER)
  147 
  148 #define NLA_ALIGNTO             4
  149 #define NLA_ALIGN(len)          (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1))
  150 #define NLA_HDRLEN              ((int) NLA_ALIGN(sizeof(struct nlattr)))
  151 
  152 
  153 #endif /* _UAPI__LINUX_NETLINK_H */

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FreeBSD/Linux Kernel Cross Reference sys/include/uapi/linux/netlink.h

FreeBSD/Linux Kernel Cross Reference
sys/include/uapi/linux/netlink.h