FreeBSD/Linux Kernel Cross Reference
sys/net/if_pppoe.h

     /* $NetBSD: if_pppoe.h,v 1.15 2017/10/12 09:50:55 knakahara Exp $ */
     
     /*-
      * Copyright (c) 2002 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Martin Husemann <martin@NetBSD.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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
     */
    
    #ifndef _NET_IF_PPPOE_H_
    #define _NET_IF_PPPOE_H_
    
    #include <sys/ioccom.h>
    
    struct pppoediscparms {
            char    ifname[IFNAMSIZ];       /* pppoe interface name */
            char    eth_ifname[IFNAMSIZ];   /* external ethernet interface name */
            const char *ac_name;            /* access concentrator name (or NULL) */
            size_t  ac_name_len;            /* on write: length of buffer for ac_name */
            const char *service_name;       /* service name (or NULL) */
            size_t  service_name_len;       /* on write: length of buffer for service name */
    };
    
    #define PPPOESETPARMS   _IOW('i', 110, struct pppoediscparms)
    #define PPPOEGETPARMS   _IOWR('i', 111, struct pppoediscparms)
    
    #define PPPOE_STATE_INITIAL     0
    #define PPPOE_STATE_PADI_SENT   1
    #define PPPOE_STATE_PADR_SENT   2
    #define PPPOE_STATE_SESSION     3
    #define PPPOE_STATE_CLOSING     4
    /* passive */
    #define PPPOE_STATE_PADO_SENT   1
    
    struct pppoeconnectionstate {
            char    ifname[IFNAMSIZ];       /* pppoe interface name */
            u_int   state;                  /* one of the PPPOE_STATE_ states above */
            u_int   session_id;             /* if state == PPPOE_STATE_SESSION */
            u_int   padi_retry_no;          /* number of retries already sent */
            u_int   padr_retry_no;
    };
    
    #define PPPOEGETSESSION _IOWR('i', 112, struct pppoeconnectionstate)
    
    #ifdef _KERNEL
    
    void pppoe_input(struct ifnet *, struct mbuf *);
    void pppoedisc_input(struct ifnet *, struct mbuf *);
    #endif /* _KERNEL */
    /*
     * Locking notes:
     * + pppoe_softc_list is protected by pppoe_softc_list_lock (an rwlock)
     *     pppoe_softc_list is a list of all pppoe_softc, and it is used to
     *     find pppoe interface by session id or host unique tag.
     * + pppoe_softc is protected by pppoe_softc->sc_lock (an rwlock)
     *     pppoe_softc holds session id and parameters to establish the id
     *
     * Locking order:
     *    - pppoe_softc_list_lock => pppoe_softc->sc_lock
     */
    #endif /* !_NET_IF_PPPOE_H_ */
    

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