/*
 *      inet6 interface/address list definitions
 *      Linux INET6 implementation 
 *
 *      Authors:
 *      Pedro Roque             <roque@di.fc.ul.pt>     
 *
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */

#ifndef _NET_IF_INET6_H
#define _NET_IF_INET6_H

#include <net/snmp.h>
#include <linux/ipv6.h>

/* inet6_dev.if_flags */

#define IF_RA_OTHERCONF 0x80
#define IF_RA_MANAGED   0x40
#define IF_RA_RCVD      0x20
#define IF_RS_SENT      0x10
#define IF_READY        0x80000000

/* prefix flags */
#define IF_PREFIX_ONLINK        0x01
#define IF_PREFIX_AUTOCONF      0x02

#ifdef __KERNEL__

struct inet6_ifaddr 
{
        struct in6_addr         addr;
        __u32                   prefix_len;
        
        __u32                   valid_lft;
        __u32                   prefered_lft;
        atomic_t                refcnt;
        spinlock_t              lock;

        __u8                    probes;
        __u8                    flags;

        __u16                   scope;

        unsigned long           cstamp; /* created timestamp */
        unsigned long           tstamp; /* updated timestamp */

        struct timer_list       timer;

        struct inet6_dev        *idev;
        struct rt6_info         *rt;

        struct inet6_ifaddr     *lst_next;      /* next addr in addr_lst */
        struct inet6_ifaddr     *if_next;       /* next addr in inet6_dev */

#ifdef CONFIG_IPV6_PRIVACY
        struct inet6_ifaddr     *tmp_next;      /* next addr in tempaddr_lst */
        struct inet6_ifaddr     *ifpub;
        int                     regen_count;
#endif

        int                     dead;
};

struct ip6_sf_socklist
{
        unsigned int            sl_max;
        unsigned int            sl_count;
        struct in6_addr         sl_addr[0];
};

#define IP6_SFLSIZE(count)      (sizeof(struct ip6_sf_socklist) + \
        (count) * sizeof(struct in6_addr))

#define IP6_SFBLOCK     10      /* allocate this many at once */

struct ipv6_mc_socklist
{
        struct in6_addr         addr;
        int                     ifindex;
        struct ipv6_mc_socklist *next;
        rwlock_t                sflock;
        unsigned int            sfmode;         /* MCAST_{INCLUDE,EXCLUDE} */
        struct ip6_sf_socklist  *sflist;
};

struct ip6_sf_list
{
        struct ip6_sf_list      *sf_next;
        struct in6_addr         sf_addr;
        unsigned long           sf_count[2];    /* include/exclude counts */
        unsigned char           sf_gsresp;      /* include in g & s response? */
        unsigned char           sf_oldin;       /* change state */
        unsigned char           sf_crcount;     /* retrans. left to send */
};

#define MAF_TIMER_RUNNING       0x01
#define MAF_LAST_REPORTER       0x02
#define MAF_LOADED              0x04
#define MAF_NOREPORT            0x08
#define MAF_GSQUERY             0x10

struct ifmcaddr6
{
        struct in6_addr         mca_addr;
        struct inet6_dev        *idev;
        struct ifmcaddr6        *next;
        struct ip6_sf_list      *mca_sources;
        struct ip6_sf_list      *mca_tomb;
        unsigned int            mca_sfmode;
        unsigned char           mca_crcount;
        unsigned long           mca_sfcount[2];
        struct timer_list       mca_timer;
        unsigned                mca_flags;
        int                     mca_users;
        atomic_t                mca_refcnt;
        spinlock_t              mca_lock;
        unsigned long           mca_cstamp;
        unsigned long           mca_tstamp;
};

/* Anycast stuff */

struct ipv6_ac_socklist
{
        struct in6_addr         acl_addr;
        int                     acl_ifindex;
        struct ipv6_ac_socklist *acl_next;
};

struct ifacaddr6
{
        struct in6_addr         aca_addr;
        struct inet6_dev        *aca_idev;
        struct rt6_info         *aca_rt;
        struct ifacaddr6        *aca_next;
        int                     aca_users;
        atomic_t                aca_refcnt;
        spinlock_t              aca_lock;
        unsigned long           aca_cstamp;
        unsigned long           aca_tstamp;
};

#define IFA_HOST        IPV6_ADDR_LOOPBACK
#define IFA_LINK        IPV6_ADDR_LINKLOCAL
#define IFA_SITE        IPV6_ADDR_SITELOCAL

struct ipv6_devstat {
        struct proc_dir_entry   *proc_dir_entry;
        DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
        DEFINE_SNMP_STAT(struct icmpv6_mib, icmpv6);
        DEFINE_SNMP_STAT(struct icmpv6msg_mib, icmpv6msg);
};

struct inet6_dev 
{
        struct net_device               *dev;

        struct inet6_ifaddr     *addr_list;

        struct ifmcaddr6        *mc_list;
        struct ifmcaddr6        *mc_tomb;
        rwlock_t                mc_lock;
        unsigned char           mc_qrv;
        unsigned char           mc_gq_running;
        unsigned char           mc_ifc_count;
        unsigned long           mc_v1_seen;
        unsigned long           mc_maxdelay;
        struct timer_list       mc_gq_timer;    /* general query timer */
        struct timer_list       mc_ifc_timer;   /* interface change timer */

        struct ifacaddr6        *ac_list;
        rwlock_t                lock;
        atomic_t                refcnt;
        __u32                   if_flags;
        int                     dead;

#ifdef CONFIG_IPV6_PRIVACY
        u8                      rndid[8];
        struct timer_list       regen_timer;
        struct inet6_ifaddr     *tempaddr_list;
#endif

        struct neigh_parms      *nd_parms;
        struct inet6_dev        *next;
        struct ipv6_devconf     cnf;
        struct ipv6_devstat     stats;
        unsigned long           tstamp; /* ipv6InterfaceTable update timestamp */
        struct rcu_head         rcu;
};

static inline void ipv6_eth_mc_map(struct in6_addr *addr, char *buf)
{
        /*
         *      +-------+-------+-------+-------+-------+-------+
         *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
         *      +-------+-------+-------+-------+-------+-------+
         */

        buf[0]= 0x33;
        buf[1]= 0x33;

        memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
}

static inline void ipv6_tr_mc_map(struct in6_addr *addr, char *buf)
{
        /* All nodes FF01::1, FF02::1, FF02::1:FFxx:xxxx */

        if (((addr->s6_addr[0] == 0xFF) &&
            ((addr->s6_addr[1] == 0x01) || (addr->s6_addr[1] == 0x02)) &&
             (addr->s6_addr16[1] == 0) &&
             (addr->s6_addr32[1] == 0) &&
             (addr->s6_addr32[2] == 0) &&
             (addr->s6_addr16[6] == 0) &&
             (addr->s6_addr[15] == 1)) ||
            ((addr->s6_addr[0] == 0xFF) &&
             (addr->s6_addr[1] == 0x02) &&
             (addr->s6_addr16[1] == 0) &&
             (addr->s6_addr32[1] == 0) &&
             (addr->s6_addr16[4] == 0) &&
             (addr->s6_addr[10] == 0) &&
             (addr->s6_addr[11] == 1) &&
             (addr->s6_addr[12] == 0xff)))
        {
                buf[0]=0xC0;
                buf[1]=0x00;
                buf[2]=0x01;
                buf[3]=0x00;
                buf[4]=0x00;
                buf[5]=0x00;
        /* All routers FF0x::2 */
        } else if ((addr->s6_addr[0] ==0xff) &&
                ((addr->s6_addr[1] & 0xF0) == 0) &&
                (addr->s6_addr16[1] == 0) &&
                (addr->s6_addr32[1] == 0) &&
                (addr->s6_addr32[2] == 0) &&
                (addr->s6_addr16[6] == 0) &&
                (addr->s6_addr[15] == 2))
        {
                buf[0]=0xC0;
                buf[1]=0x00;
                buf[2]=0x02;
                buf[3]=0x00;
                buf[4]=0x00;
                buf[5]=0x00;
        } else {
                unsigned char i ; 
                
                i = addr->s6_addr[15] & 7 ; 
                buf[0]=0xC0;
                buf[1]=0x00;
                buf[2]=0x00;
                buf[3]=0x01 << i ; 
                buf[4]=0x00;
                buf[5]=0x00;
        }
}

static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
{
        buf[0] = 0x00;
}

static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
                                  const unsigned char *broadcast, char *buf)
{
        unsigned char scope = broadcast[5] & 0xF;

        buf[0]  = 0;            /* Reserved */
        buf[1]  = 0xff;         /* Multicast QPN */
        buf[2]  = 0xff;
        buf[3]  = 0xff;
        buf[4]  = 0xff;
        buf[5]  = 0x10 | scope; /* scope from broadcast address */
        buf[6]  = 0x60;         /* IPv6 signature */
        buf[7]  = 0x1b;
        buf[8]  = broadcast[8]; /* P_Key */
        buf[9]  = broadcast[9];
        memcpy(buf + 10, addr->s6_addr + 6, 10);
}
#endif
#endif