FreeBSD/Linux Kernel Cross Reference
sys/netinet/ip_divert.h

     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright (c) 2003 Sam Leffler, Errno Consulting
      * All rights reserved.
      *
      * 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,
     *    without modification.
     * 2. Redistributions in binary form must reproduce at minimum a disclaimer
     *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
     *    redistribution must be conditioned upon including a substantially
     *    similar Disclaimer requirement for further binary redistribution.
     * 3. Neither the names of the above-listed copyright holders nor the names
     *    of any contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * NO WARRANTY
     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
     * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
     * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
     *
     * $FreeBSD$
     */
    
    #ifndef _NETINET_IP_DIVERT_H_
    #define _NETINET_IP_DIVERT_H_
    #include <sys/types.h>
    
    /*
     * All communication occurs through a sockaddr_in socket where
     *
     * kernel-->userland
     *      sin_port = matching rule, host format;
     *      sin_addr = IN: first address of the incoming interface;
     *                 OUT: INADDR_ANY
     *      sin_zero = if fits, the interface name (max 7 bytes + NUL)
     *
     * userland->kernel
     *      sin_port = restart-rule - 1, host order
     *              (we restart at sin_port + 1)
     *      sin_addr = IN: address of the incoming interface;
     *                 OUT: INADDR_ANY
     */
    
    struct divstat {
            uint64_t        div_diverted;   /* successfully diverted to userland */
            uint64_t        div_noport;     /* failed due to no bound socket */
            uint64_t        div_outbound;   /* re-injected as outbound */
            uint64_t        div_inbound;    /* re-injected as inbound */
    };
    #endif /* _NETINET_IP_DIVERT_H_ */

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