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/*

 * Copyright (c) 1982, 1986, 1990, 1993

 *      The Regents of the University of California.  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.

 * 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.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *      This product includes software developed by the University of

 *      California, Berkeley and its contributors.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.

 *

 *      @(#)in_pcb.h    8.1 (Berkeley) 6/10/93

 * $FreeBSD: src/sys/netinet/in_pcb.h,v 1.48 2002/04/09 20:04:10 jhb Exp $

 */

#ifndef _NETINET_IN_PCB_H_

#define _NETINET_IN_PCB_H_

#include <sys/queue.h>

#include <net/route.h>

#include <netinet6/ipsec.h> /* for IPSEC */

#include <vm/uma.h>

#define in6pcb          inpcb   /* for KAME src sync over BSD*'s */

#define in6p_sp         inp_sp  /* for KAME src sync over BSD*'s */

/*

 * Common structure pcb for internet protocol implementation.

 * Here are stored pointers to local and foreign host table

 * entries, local and foreign socket numbers, and pointers

 * up (to a socket structure) and down (to a protocol-specific)

 * control block.

 */

LIST_HEAD(inpcbhead, inpcb);

LIST_HEAD(inpcbporthead, inpcbport);

typedef u_quad_t        inp_gen_t;

/*

 * PCB with AF_INET6 null bind'ed laddr can receive AF_INET input packet.

 * So, AF_INET6 null laddr is also used as AF_INET null laddr,

 * by utilize following structure. (At last, same as INRIA)

 */

struct in_addr_4in6 {

        u_int32_t       ia46_pad32[3];

        struct  in_addr ia46_addr4;

};

/*

 * NOTE: ipv6 addrs should be 64-bit aligned, per RFC 2553.

 * in_conninfo has some extra padding to accomplish this.

 */

struct in_endpoints {

        u_int16_t       ie_fport;               /* foreign port */

        u_int16_t       ie_lport;               /* local port */

        /* protocol dependent part, local and foreign addr */

        union {

                /* foreign host table entry */

                struct  in_addr_4in6 ie46_foreign;

                struct  in6_addr ie6_foreign;

        } ie_dependfaddr;

        union {

                /* local host table entry */

                struct  in_addr_4in6 ie46_local;

                struct  in6_addr ie6_local;

        } ie_dependladdr;

#define ie_faddr        ie_dependfaddr.ie46_foreign.ia46_addr4

#define ie_laddr        ie_dependladdr.ie46_local.ia46_addr4

#define ie6_faddr       ie_dependfaddr.ie6_foreign

#define ie6_laddr       ie_dependladdr.ie6_local

};

/*

 * XXX

 * At some point struct route should possibly change to:

 *   struct rtentry *rt

 *   struct in_endpoints *ie;

 */

struct in_conninfo {

        u_int8_t        inc_flags;

        u_int8_t        inc_len;

        u_int16_t       inc_pad;        /* XXX alignment for in_endpoints */

        /* protocol dependent part; cached route */

        struct  in_endpoints inc_ie;

        union {

                /* placeholder for routing entry */

                struct  route inc4_route;

                struct  route_in6 inc6_route;

        } inc_dependroute;

};

#define inc_isipv6      inc_flags       /* temp compatability */

#define inc_fport       inc_ie.ie_fport

#define inc_lport       inc_ie.ie_lport

#define inc_faddr       inc_ie.ie_faddr

#define inc_laddr       inc_ie.ie_laddr

#define inc_route       inc_dependroute.inc4_route

#define inc6_faddr      inc_ie.ie6_faddr

#define inc6_laddr      inc_ie.ie6_laddr

#define inc6_route      inc_dependroute.inc6_route

struct  icmp6_filter;

struct inpcb {

        LIST_ENTRY(inpcb) inp_hash; /* hash list */

        LIST_ENTRY(inpcb) inp_list; /* list for all PCBs of this proto */

        u_int32_t       inp_flow;

        /* local and foreign ports, local and foreign addr */

        struct  in_conninfo inp_inc;

        caddr_t inp_ppcb;               /* pointer to per-protocol pcb */

        struct  inpcbinfo *inp_pcbinfo; /* PCB list info */

        struct  socket *inp_socket;     /* back pointer to socket */

                                        /* list for this PCB's local port */

        int     inp_flags;              /* generic IP/datagram flags */

        struct  inpcbpolicy *inp_sp; /* for IPSEC */

        u_char  inp_vflag;              /* IP version flag (v4/v6) */

#define INP_IPV4        0x1

#define INP_IPV6        0x2

        u_char  inp_ip_ttl;             /* time to live proto */

        u_char  inp_ip_p;               /* protocol proto */

        /* protocol dependent part; options */

        struct {

                u_char  inp4_ip_tos;            /* type of service proto */

                struct  mbuf *inp4_options;     /* IP options */

                struct  ip_moptions *inp4_moptions; /* IP multicast options */

        } inp_depend4;

#define inp_fport       inp_inc.inc_fport

#define inp_lport       inp_inc.inc_lport

#define inp_faddr       inp_inc.inc_faddr

#define inp_laddr       inp_inc.inc_laddr

#define inp_route       inp_inc.inc_route

#define inp_ip_tos      inp_depend4.inp4_ip_tos

#define inp_options     inp_depend4.inp4_options

#define inp_moptions    inp_depend4.inp4_moptions

        struct {

                /* IP options */

                struct  mbuf *inp6_options;

                /* IP6 options for outgoing packets */

                struct  ip6_pktopts *inp6_outputopts;

                /* IP multicast options */

                struct  ip6_moptions *inp6_moptions;

                /* ICMPv6 code type filter */

                struct  icmp6_filter *inp6_icmp6filt;

                /* IPV6_CHECKSUM setsockopt */

                int     inp6_cksum;

                u_short inp6_ifindex;

                short   inp6_hops;

                u_int8_t        inp6_hlim;

        } inp_depend6;

        LIST_ENTRY(inpcb) inp_portlist;

        struct  inpcbport *inp_phd;     /* head of this list */

        inp_gen_t       inp_gencnt;     /* generation count of this instance */

#define in6p_faddr      inp_inc.inc6_faddr

#define in6p_laddr      inp_inc.inc6_laddr

#define in6p_route      inp_inc.inc6_route

#define in6p_ip6_hlim   inp_depend6.inp6_hlim

#define in6p_hops       inp_depend6.inp6_hops   /* default hop limit */

#define in6p_ip6_nxt    inp_ip_p

#define in6p_flowinfo   inp_flow

#define in6p_vflag      inp_vflag

#define in6p_options    inp_depend6.inp6_options

#define in6p_outputopts inp_depend6.inp6_outputopts

#define in6p_moptions   inp_depend6.inp6_moptions

#define in6p_icmp6filt  inp_depend6.inp6_icmp6filt

#define in6p_cksum      inp_depend6.inp6_cksum

#define inp6_ifindex    inp_depend6.inp6_ifindex

#define in6p_flags      inp_flags  /* for KAME src sync over BSD*'s */

#define in6p_socket     inp_socket  /* for KAME src sync over BSD*'s */

#define in6p_lport      inp_lport  /* for KAME src sync over BSD*'s */

#define in6p_fport      inp_fport  /* for KAME src sync over BSD*'s */

#define in6p_ppcb       inp_ppcb  /* for KAME src sync over BSD*'s */

};

/*

 * The range of the generation count, as used in this implementation,

 * is 9e19.  We would have to create 300 billion connections per

 * second for this number to roll over in a year.  This seems sufficiently

 * unlikely that we simply don't concern ourselves with that possibility.

 */

/*

 * Interface exported to userland by various protocols which use

 * inpcbs.  Hack alert -- only define if struct xsocket is in scope.

 */

#ifdef _SYS_SOCKETVAR_H_

struct  xinpcb {

        size_t  xi_len;         /* length of this structure */

        struct  inpcb xi_inp;

        struct  xsocket xi_socket;

        u_quad_t        xi_alignment_hack;

};

struct  xinpgen {

        size_t  xig_len;        /* length of this structure */

        u_int   xig_count;      /* number of PCBs at this time */

        inp_gen_t xig_gen;      /* generation count at this time */

        so_gen_t xig_sogen;     /* socket generation count at this time */

};

#endif /* _SYS_SOCKETVAR_H_ */

struct inpcbport {

        LIST_ENTRY(inpcbport) phd_hash;

        struct inpcbhead phd_pcblist;

        u_short phd_port;

};

struct inpcbinfo {              /* XXX documentation, prefixes */

        struct  inpcbhead *hashbase;

        u_long  hashmask;

        struct  inpcbporthead *porthashbase;

        u_long  porthashmask;

        struct  inpcbhead *listhead;

        u_short lastport;

        u_short lastlow;

        u_short lasthi;

        uma_zone_t ipi_zone; /* zone to allocate pcbs from */

        u_int   ipi_count;      /* number of pcbs in this list */

        u_quad_t ipi_gencnt;    /* current generation count */

};

#define INP_PCBHASH(faddr, lport, fport, mask) \

        (((faddr) ^ ((faddr) >> 16) ^ ntohs((lport) ^ (fport))) & (mask))

#define INP_PCBPORTHASH(lport, mask) \

        (ntohs((lport)) & (mask))

/* flags in inp_flags: */

#define INP_RECVOPTS            0x01    /* receive incoming IP options */

#define INP_RECVRETOPTS         0x02    /* receive IP options for reply */

#define INP_RECVDSTADDR         0x04    /* receive IP dst address */

#define INP_HDRINCL             0x08    /* user supplies entire IP header */

#define INP_HIGHPORT            0x10    /* user wants "high" port binding */

#define INP_LOWPORT             0x20    /* user wants "low" port binding */

#define INP_ANONPORT            0x40    /* port chosen for user */

#define INP_RECVIF              0x80    /* receive incoming interface */

#define INP_MTUDISC             0x100   /* user can do MTU discovery */

#define INP_FAITH               0x200   /* accept FAITH'ed connections */

#define IN6P_IPV6_V6ONLY        0x008000 /* restrict AF_INET6 socket for v6 */

#define IN6P_PKTINFO            0x010000 /* receive IP6 dst and I/F */

#define IN6P_HOPLIMIT           0x020000 /* receive hoplimit */

#define IN6P_HOPOPTS            0x040000 /* receive hop-by-hop options */

#define IN6P_DSTOPTS            0x080000 /* receive dst options after rthdr */

#define IN6P_RTHDR              0x100000 /* receive routing header */

#define IN6P_RTHDRDSTOPTS       0x200000 /* receive dstoptions before rthdr */

#define IN6P_AUTOFLOWLABEL      0x800000 /* attach flowlabel automatically */

#define IN6P_BINDV6ONLY         0x10000000 /* do not grab IPv4 traffic */

#define INP_CONTROLOPTS         (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\

                                        INP_RECVIF|\

                                 IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_HOPOPTS|\

                                 IN6P_DSTOPTS|IN6P_RTHDR|IN6P_RTHDRDSTOPTS|\

                                 IN6P_AUTOFLOWLABEL)

#define INP_UNMAPPABLEOPTS      (IN6P_HOPOPTS|IN6P_DSTOPTS|IN6P_RTHDR|\

                                 IN6P_AUTOFLOWLABEL)

 /* for KAME src sync over BSD*'s */

#define IN6P_HIGHPORT           INP_HIGHPORT

#define IN6P_LOWPORT            INP_LOWPORT

#define IN6P_ANONPORT           INP_ANONPORT

#define IN6P_RECVIF             INP_RECVIF

#define IN6P_MTUDISC            INP_MTUDISC

#define IN6P_FAITH              INP_FAITH

#define IN6P_CONTROLOPTS INP_CONTROLOPTS

        /*

         * socket AF version is {newer than,or include}

         * actual datagram AF version

         */

#define INPLOOKUP_WILDCARD      1

#define sotoinpcb(so)   ((struct inpcb *)(so)->so_pcb)

#define sotoin6pcb(so)  sotoinpcb(so) /* for KAME src sync over BSD*'s */

#define INP_SOCKAF(so) so->so_proto->pr_domain->dom_family

#define INP_CHECK_SOCKAF(so, af)        (INP_SOCKAF(so) == af)

#ifdef _KERNEL

extern int      ipport_lowfirstauto;

extern int      ipport_lowlastauto;

extern int      ipport_firstauto;

extern int      ipport_lastauto;

extern int      ipport_hifirstauto;

extern int      ipport_hilastauto;

void    in_pcbpurgeif0(struct inpcb *, struct ifnet *);

void    in_losing(struct inpcb *);

void    in_rtchange(struct inpcb *, int);

int     in_pcballoc(struct socket *, struct inpcbinfo *, struct thread *);

int     in_pcbbind(struct inpcb *, struct sockaddr *, struct thread *);

int     in_pcbconnect(struct inpcb *, struct sockaddr *, struct thread *);

void    in_pcbdetach(struct inpcb *);

void    in_pcbdisconnect(struct inpcb *);

int     in_pcbinshash(struct inpcb *);

int     in_pcbladdr(struct inpcb *, struct sockaddr *,

            struct sockaddr_in **);

struct inpcb *

        in_pcblookup_local(struct inpcbinfo *,

            struct in_addr, u_int, int);

struct inpcb *

        in_pcblookup_hash(struct inpcbinfo *, struct in_addr, u_int,

            struct in_addr, u_int, int, struct ifnet *);

void    in_pcbnotifyall(struct inpcbhead *, struct in_addr,

            int, void (*)(struct inpcb *, int));

void    in_pcbrehash(struct inpcb *);

int     in_setpeeraddr(struct socket *so, struct sockaddr **nam);

int     in_setsockaddr(struct socket *so, struct sockaddr **nam);

void    in_pcbremlists(struct inpcb *inp);

int     prison_xinpcb(struct thread *td, struct inpcb *inp);

#endif /* _KERNEL */

#endif /* !_NETINET_IN_PCB_H_ */