FreeBSD/Linux Kernel Cross Reference
sys/netinet/in_pcb.h

     /*
      * 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
     * $FreeBSD$
     */
    
    #ifndef _NETINET_IN_PCB_H_
    #define _NETINET_IN_PCB_H_
    
    #include <sys/queue.h>
    
    #include <net/route.h>
    
    #define in6pcb          inpcb   /* for KAME src sync over BSD*'s */
    #define in6p_sp         inp_sp  /* for KAME src sync over BSD*'s */
    struct inpcbpolicy;
    
    /*
     * 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
   
   /*
    * NB: the zone allocator is type-stable EXCEPT FOR THE FIRST TWO LONGS
    * of the structure.  Therefore, it is important that the members in
    * that position not contain any information which is required to be
    * stable.
    */
   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;
   #define INP_IPV4        0x1
   #define INP_IPV6        0x2
   #define INP_ONESBCAST   0x10            /* send all-ones broadcast */
           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;
           struct  vm_zone *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 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;
   extern struct callout ipport_tick_callout;
   
   void    in_pcbpurgeif0 __P((struct inpcb *, struct ifnet *));
   void    in_losing __P((struct inpcb *));
   void    in_rtchange __P((struct inpcb *, int));
   int     in_pcballoc __P((struct socket *, struct inpcbinfo *, struct proc *));
   int     in_pcbbind __P((struct inpcb *, struct sockaddr *, struct proc *));
   int     in_pcbconnect __P((struct inpcb *, struct sockaddr *, struct proc *));
   void    in_pcbdetach __P((struct inpcb *));
   void    in_pcbdisconnect __P((struct inpcb *));
   int     in_pcbinshash __P((struct inpcb *));
   int     in_pcbladdr __P((struct inpcb *, struct sockaddr *,
               struct sockaddr_in **));
   struct inpcb *
           in_pcblookup_local __P((struct inpcbinfo *,
               struct in_addr, u_int, int));
   struct inpcb *
           in_pcblookup_hash __P((struct inpcbinfo *,
                                  struct in_addr, u_int, struct in_addr, u_int,
                                  int, struct ifnet *));
   void    in_pcbnotifyall __P((struct inpcbhead *, struct in_addr,
               int, void (*)(struct inpcb *, int)));
   void    in_pcbrehash __P((struct inpcb *));
   int     in_setpeeraddr __P((struct socket *so, struct sockaddr **nam));
   int     in_setsockaddr __P((struct socket *so, struct sockaddr **nam));
   void    in_pcbremlists __P((struct inpcb *inp));
   void    ipport_tick(void *xtp);
   int     prison_xinpcb __P((struct proc *p, struct inpcb *inp));
   #endif /* _KERNEL */
   
   #endif /* !_NETINET_IN_PCB_H_ */

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