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Annotation of embedaddon/libpdel/ppp/ppp_l2tp_server.h, revision 1.1

1.1     ! misho       1: 
        !             2: /*
        !             3:  * Copyright (c) 2001-2002 Packet Design, LLC.
        !             4:  * All rights reserved.
        !             5:  * 
        !             6:  * Subject to the following obligations and disclaimer of warranty,
        !             7:  * use and redistribution of this software, in source or object code
        !             8:  * forms, with or without modifications are expressly permitted by
        !             9:  * Packet Design; provided, however, that:
        !            10:  * 
        !            11:  *    (i)  Any and all reproductions of the source or object code
        !            12:  *         must include the copyright notice above and the following
        !            13:  *         disclaimer of warranties; and
        !            14:  *    (ii) No rights are granted, in any manner or form, to use
        !            15:  *         Packet Design trademarks, including the mark "PACKET DESIGN"
        !            16:  *         on advertising, endorsements, or otherwise except as such
        !            17:  *         appears in the above copyright notice or in the software.
        !            18:  * 
        !            19:  * THIS SOFTWARE IS BEING PROVIDED BY PACKET DESIGN "AS IS", AND
        !            20:  * TO THE MAXIMUM EXTENT PERMITTED BY LAW, PACKET DESIGN MAKES NO
        !            21:  * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING
        !            22:  * THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED
        !            23:  * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
        !            24:  * OR NON-INFRINGEMENT.  PACKET DESIGN DOES NOT WARRANT, GUARANTEE,
        !            25:  * OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS
        !            26:  * OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY,
        !            27:  * RELIABILITY OR OTHERWISE.  IN NO EVENT SHALL PACKET DESIGN BE
        !            28:  * LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE
        !            29:  * OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT,
        !            30:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL
        !            31:  * DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF
        !            32:  * USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY THEORY OF
        !            33:  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
        !            34:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
        !            35:  * THE USE OF THIS SOFTWARE, EVEN IF PACKET DESIGN IS ADVISED OF
        !            36:  * THE POSSIBILITY OF SUCH DAMAGE.
        !            37:  *
        !            38:  * Author: Archie Cobbs <archie@freebsd.org>
        !            39:  */
        !            40: 
        !            41: #ifndef _PPP_L2TP_PDEL_PPP_PPP_L2TP_SERVER_H_
        !            42: #define _PPP_L2TP_PDEL_PPP_PPP_L2TP_SERVER_H_
        !            43: 
        !            44: struct ppp_engine;
        !            45: struct ppp_l2tp_peer;
        !            46: struct ppp_channel;
        !            47: 
        !            48: #define L2TP_PORT              1701
        !            49: 
        !            50: /*
        !            51:  * Callback for client to decide whether establishing a new L2TP
        !            52:  * connection from ip:port is ok or not.
        !            53:  *
        !            54:  * Should return a non-NULL cookie to let the channel be established.
        !            55:  * This argument becomes the 'carg' parameter to the 'plumb' and
        !            56:  * 'destroy' methods below; the destroy method below is guaranteed
        !            57:  * to be called exactly once if 'admit' returns a non-NULL cookie
        !            58:  * (unless ppp_l2tp_server_close() is called first).
        !            59:  *
        !            60:  * The 'peer' may be used in a call to ppp_l2tp_server_close() to
        !            61:  * close the associated L2TP connection before 'destroy' is called.
        !            62:  * If so, 'destroy' will not be called. Calling ppp_l2tp_server_close()
        !            63:  * after 'destroy' has been called will cause a crash.
        !            64:  *
        !            65:  * If desired, a name for this link (for logging purposes) may be
        !            66:  * printed into the 'name' buffer, which has size 'nsize'.
        !            67:  *
        !            68:  * Note: we only allow one L2TP session to be established within
        !            69:  * each control connection. So this will not be called if there is
        !            70:  * already a connection with ip:port.
        !            71:  */
        !            72: typedef void   *ppp_l2tp_server_admit_t(void *arg, struct ppp_l2tp_peer *peer,
        !            73:                        struct in_addr ip, u_int16_t port,
        !            74:                        struct ppp_auth_config *auth, char *name, size_t nsize);
        !            75: 
        !            76: /*
        !            77:  * Do any NAT mapping required to set up a reverse mapping from
        !            78:  * our address at self_ip:self_port back to peer_ip:peer_port.
        !            79:  * The original port we received the initial packet on is orig_port.
        !            80:  *
        !            81:  * This method is optional.
        !            82:  */
        !            83: typedef int    ppp_l2tp_server_natmap_t(void *arg,
        !            84:                        struct in_addr self_ip, u_int16_t self_port,
        !            85:                        u_int16_t orig_port, struct in_addr peer_ip,
        !            86:                        u_int16_t peer_port);
        !            87: 
        !            88: /*
        !            89:  * Callback to tear down client state associated with a L2TP connection.
        !            90:  *
        !            91:  * After this function is called, "carg" will not be used again.
        !            92:  */
        !            93: typedef void   ppp_l2tp_server_destroy_t(void *arg, void *carg);
        !            94: 
        !            95: /*
        !            96:  * Info supplied by client library to L2TP server.
        !            97:  */
        !            98: struct ppp_l2tp_server_info {
        !            99:        void                            *arg;
        !           100:        const char                      *vendor;
        !           101:        ppp_l2tp_server_admit_t         *admit;
        !           102:        ppp_l2tp_server_natmap_t        *natmap;
        !           103:        ppp_l2tp_server_destroy_t       *destroy;
        !           104: };
        !           105: 
        !           106: __BEGIN_DECLS
        !           107: 
        !           108: /* Functions */
        !           109: extern int     ppp_l2tp_server_start(struct ppp_engine *engine,
        !           110:                        const struct ppp_l2tp_server_info *info,
        !           111:                        struct in_addr ip, u_int16_t port, u_int max_conn);
        !           112: extern void    *ppp_l2tp_server_get_client_info(struct ppp_channel *chan);
        !           113: extern void    ppp_l2tp_server_close(struct ppp_engine *engine,
        !           114:                        struct ppp_l2tp_peer **peerp);
        !           115: extern void    ppp_l2tp_server_stop(struct ppp_engine *engine);
        !           116: 
        !           117: __END_DECLS
        !           118: 
        !           119: #endif /* _PPP_L2TP_PDEL_PPP_PPP_L2TP_SERVER_H_ */