FreeBSD/Linux Kernel Cross Reference
sys/netlink/netlink_generic.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2022 Alexander V. Chernikov <melifaro@FreeBSD.org>
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    /*
     * Generic netlink message header and attributes
     */
    #ifndef _NETLINK_NETLINK_GENERIC_H_
    #define _NETLINK_NETLINK_GENERIC_H_
    
    #include <netlink/netlink.h>
    
    /* Base header for all of the relevant messages */
    struct genlmsghdr {
            uint8_t         cmd;            /* CTRL_CMD_ */
            uint8_t         version;        /* ABI version for the cmd */
            uint16_t        reserved;       /* reserved: set to 0 */
    };
    #define GENL_HDRLEN     NL_ITEM_ALIGN(sizeof(struct genlmsghdr))
    
    /* Dynamic family number range, inclusive */
    #define GENL_MIN_ID     NLMSG_MIN_TYPE
    #define GENL_MAX_ID     1023
    
    /* Pre-defined family numbers */
    #define GENL_ID_CTRL    GENL_MIN_ID
    
    /* Available commands */
    enum {
            CTRL_CMD_UNSPEC         = 0,
            CTRL_CMD_NEWFAMILY      = 1,
            CTRL_CMD_DELFAMILY      = 2,
            CTRL_CMD_GETFAMILY      = 3, /* lists all (or matching) genetlink families */
            CTRL_CMD_NEWOPS         = 4,
            CTRL_CMD_DELOPS         = 5,
            CTRL_CMD_GETOPS         = 6,
            CTRL_CMD_NEWMCAST_GRP   = 7,
            CTRL_CMD_DELMCAST_GRP   = 8,
            CTRL_CMD_GETMCAST_GRP   = 9,
            CTRL_CMD_GETPOLICY      = 10,
            __CTRL_CMD_MAX,
    };
    #define CTRL_CMD_MAX    (__CTRL_CMD_MAX - 1)
    
    /* Generic attributes */
    enum {
            CTRL_ATTR_UNSPEC,
            CTRL_ATTR_FAMILY_ID     = 1, /* u16, dynamically-assigned ID */
            CTRL_ATTR_FAMILY_NAME   = 2, /* string, family name */
            CTRL_ATTR_VERSION       = 3, /* u32, command version */
            CTRL_ATTR_HDRSIZE       = 4, /* u32, family header size */
            CTRL_ATTR_MAXATTR       = 5, /* u32, maximum family attr # */
            CTRL_ATTR_OPS           = 6, /* nested, available operations */
            CTRL_ATTR_MCAST_GROUPS  = 7,
            CTRL_ATTR_POLICY        = 8,
            CTRL_ATTR_OP_POLICY     = 9,
            CTRL_ATTR_OP            = 10,
            __CTRL_ATTR_MAX,
    };
    #define CTRL_ATTR_MAX   (__CTRL_ATTR_MAX - 1)
    
    #define GENL_NAMSIZ     16 /* max family name length including \0 */
    
    /* CTRL_ATTR_OPS attributes */
    enum {
            CTRL_ATTR_OP_UNSPEC,
            CTRL_ATTR_OP_ID         = 1, /* u32, operation # */
            CTRL_ATTR_OP_FLAGS      = 2, /* u32, flags-based op description */
            __CTRL_ATTR_OP_MAX,
    };
    #define CTRL_ATTR_OP_MAX        (__CTRL_ATTR_OP_MAX - 1)
    
    /* CTRL_ATTR_OP_FLAGS values */
    #define GENL_ADMIN_PERM         0x0001 /* Requires elevated permissions */
    #define GENL_CMD_CAP_DO         0x0002 /* Operation is a modification request */
    #define GENL_CMD_CAP_DUMP       0x0004 /* Operation is a get/dump request */
   #define GENL_CMD_CAP_HASPOL     0x0008 /* Operation has a validation policy */
   #define GENL_UNS_ADMIN_PERM     0x0010
   
   /* CTRL_ATTR_MCAST_GROUPS attributes */
   enum {
           CTRL_ATTR_MCAST_GRP_UNSPEC,
           CTRL_ATTR_MCAST_GRP_NAME,       /* string, group name */
           CTRL_ATTR_MCAST_GRP_ID,         /* u32, dynamically-assigned group id */
           __CTRL_ATTR_MCAST_GRP_MAX,
   };
   #define CTRL_ATTR_MCAST_GRP_MAX (__CTRL_ATTR_MCAST_GRP_MAX - 1)
   
   
   #endif
   

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