/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _OSPF6_H
#define _OSPF6_H

/*
 * Definitions for parsing OSPF packets (RFC 2328)
 */

#ifdef __cplusplus
extern "C" {
#endif

struct lsa6_hdr {
        uint16_t ls6_age;
        uint16_t ls6_type;
        uint32_t ls6_stateid;
        uint32_t ls6_router;
        uint32_t ls6_seq;
        uint16_t ls6_chksum;
        uint16_t ls6_length;
};

struct lsa6_prefix {
        uint8_t  lsa6_plen;
        uint8_t  lsa6_popt;
        uint16_t lsa6_pmbz;
        uint8_t  lsa6_pfx[4];
};

/* link state advertisement */
struct lsa6 {
        struct lsa6_hdr ls6_hdr;

        /* Link state types */
        union {
                /* Router links advertisements */
                struct {
                        union {
                                uint8_t  rla_flg;
                                uint32_t rla_opt;
                        } un_rla_flgopt;
#define rla6_flags      un_rla_flgopt.rla_flg
#define rla6_options    un_rla_flgopt.rla_opt
                        struct rla6link {
                                uint8_t link_type;
                                uint8_t link_zero[1];
                                uint16_t link_metric;
                                uint32_t link_ifid;
                                uint32_t link_nifid;
                                uint32_t link_nrtid;
                        } rla_link[1];          /* may repeat   */
                } un_rla;

                /* Network links advertisements */
                struct {
                        uint32_t nla_options;
                        uint32_t nla_router[1]; /* may repeat   */
                } un_nla;

                /* Inter Area Prefix LSA */
                struct {
                        uint32_t inter_ap_metric;
                        struct lsa6_prefix inter_ap_prefix[1];
                } un_inter_ap;

                /* Link LSA */
                struct llsa {
                        union {
                                uint8_t pri;
                                uint32_t opt;
                        } llsa_priandopt;
#define llsa_priority   llsa_priandopt.pri
#define llsa_options    llsa_priandopt.opt
                        struct in6_addr llsa_lladdr;
                        uint32_t llsa_nprefix;
                        struct lsa6_prefix llsa_prefix[1];
                } un_llsa;

                /* Intra-Area-Prefix */
                struct {
                        uint16_t intra_ap_nprefix;
                        uint16_t intra_ap_lstype;
                        uint32_t intra_ap_lsid;
                        uint32_t intra_ap_rtid;
                        struct lsa6_prefix intra_ap_prefix[1];
                } un_intra_ap;
        } lsa_un;
};

struct ospf6hdr {
        uint8_t ospf6_version;
        uint8_t ospf6_type;
        uint16_t ospf6_len;
        uint32_t ospf6_routerid;
        uint32_t ospf6_areaid;
        uint16_t ospf6_chksum;
        uint8_t ospf6_instanceid;
        uint8_t ospf6_rsvd;
        union {

                /* Hello packet */
                struct {
                        uint32_t hello_ifid;
                        union {
                                uint8_t pri;
                                uint32_t opt;
                        } hello_priandopt;
#define hello6_priority hello_priandopt.pri
#define hello6_options  hello_priandopt.opt
                        uint16_t hello_helloint;
                        uint16_t hello_deadint;
                        uint32_t hello_dr;
                        uint32_t hello_bdr;
                        uint32_t hello_neighbor[1];     /* may repeat   */
                } un_hello;

                /* Database Description packet */
                struct {
                        uint32_t db_options;
                        uint16_t db_mtu;
                        uint8_t db_mbz;
                        uint8_t db_flags;
                        uint32_t db_seq;
                        struct lsa6_hdr db_lshdr[1];    /* may repeat   */
                } un_db;

                /* Link State Request */
                struct lsr6 {
                        uint16_t ls_mbz;
                        uint16_t ls_type;
                        uint32_t ls_stateid;
                        uint32_t ls_router;
                } un_lsr[1];                            /* may repeat   */

                /* Link State Update */
                struct {
                        uint32_t lsu_count;
                        struct lsa6 lsu_lsa[1];         /* may repeat   */
                } un_lsu;

                /* Link State Acknowledgement */
                struct {
                        struct lsa6_hdr lsa_lshdr[1];   /* may repeat   */
                } un_lsa;
        } ospf6_un;
};

#define ospf6_hello     ospf6_un.un_hello
#define ospf6_db        ospf6_un.un_db
#define ospf6_lsr       ospf6_un.un_lsr
#define ospf6_lsu       ospf6_un.un_lsu
#define ospf6_lsa       ospf6_un.un_lsa

#ifdef __cplusplus
}
#endif

#endif /* _OSPF6_H */