The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netinet6/ip6_var.h

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    1 /*-
    2  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. Neither the name of the project nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      $KAME: ip6_var.h,v 1.62 2001/05/03 14:51:48 itojun Exp $
   30  */
   31 
   32 /*-
   33  * Copyright (c) 1982, 1986, 1993
   34  *      The Regents of the University of California.  All rights reserved.
   35  *
   36  * Redistribution and use in source and binary forms, with or without
   37  * modification, are permitted provided that the following conditions
   38  * are met:
   39  * 1. Redistributions of source code must retain the above copyright
   40  *    notice, this list of conditions and the following disclaimer.
   41  * 2. Redistributions in binary form must reproduce the above copyright
   42  *    notice, this list of conditions and the following disclaimer in the
   43  *    documentation and/or other materials provided with the distribution.
   44  * 4. Neither the name of the University nor the names of its contributors
   45  *    may be used to endorse or promote products derived from this software
   46  *    without specific prior written permission.
   47  *
   48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   58  * SUCH DAMAGE.
   59  *
   60  *      @(#)ip_var.h    8.1 (Berkeley) 6/10/93
   61  * $FreeBSD: releng/8.3/sys/netinet6/ip6_var.h 212351 2010-09-09 06:43:18Z bz $
   62  */
   63 
   64 #ifndef _NETINET6_IP6_VAR_H_
   65 #define _NETINET6_IP6_VAR_H_
   66 
   67 /*
   68  * IP6 reassembly queue structure.  Each fragment
   69  * being reassembled is attached to one of these structures.
   70  */
   71 struct  ip6q {
   72         struct ip6asfrag *ip6q_down;
   73         struct ip6asfrag *ip6q_up;
   74         u_int32_t       ip6q_ident;
   75         u_int8_t        ip6q_nxt;
   76         u_int8_t        ip6q_ecn;
   77         u_int8_t        ip6q_ttl;
   78         struct in6_addr ip6q_src, ip6q_dst;
   79         struct ip6q     *ip6q_next;
   80         struct ip6q     *ip6q_prev;
   81         int             ip6q_unfrglen;  /* len of unfragmentable part */
   82 #ifdef notyet
   83         u_char          *ip6q_nxtp;
   84 #endif
   85         int             ip6q_nfrag;     /* # of fragments */
   86         struct label    *ip6q_label;
   87 };
   88 
   89 struct  ip6asfrag {
   90         struct ip6asfrag *ip6af_down;
   91         struct ip6asfrag *ip6af_up;
   92         struct mbuf     *ip6af_m;
   93         int             ip6af_offset;   /* offset in ip6af_m to next header */
   94         int             ip6af_frglen;   /* fragmentable part length */
   95         int             ip6af_off;      /* fragment offset */
   96         u_int16_t       ip6af_mff;      /* more fragment bit in frag off */
   97 };
   98 
   99 #define IP6_REASS_MBUF(ip6af) (*(struct mbuf **)&((ip6af)->ip6af_m))
  100 
  101 /*
  102  * Structure attached to inpcb.in6p_moptions and
  103  * passed to ip6_output when IPv6 multicast options are in use.
  104  * This structure is lazy-allocated.
  105  */
  106 struct ip6_moptions {
  107         struct  ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
  108         u_char  im6o_multicast_hlim;    /* hoplimit for outgoing multicasts */
  109         u_char  im6o_multicast_loop;    /* 1 >= hear sends if a member */
  110         u_short im6o_num_memberships;   /* no. memberships this socket */
  111         u_short im6o_max_memberships;   /* max memberships this socket */
  112         struct  in6_multi **im6o_membership;    /* group memberships */
  113         struct  in6_mfilter *im6o_mfilters;     /* source filters */
  114 };
  115 
  116 /*
  117  * Control options for outgoing packets
  118  */
  119 
  120 /* Routing header related info */
  121 struct  ip6po_rhinfo {
  122         struct  ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
  123         struct  route_in6 ip6po_rhi_route; /* Route to the 1st hop */
  124 };
  125 #define ip6po_rthdr     ip6po_rhinfo.ip6po_rhi_rthdr
  126 #define ip6po_route     ip6po_rhinfo.ip6po_rhi_route
  127 
  128 /* Nexthop related info */
  129 struct  ip6po_nhinfo {
  130         struct  sockaddr *ip6po_nhi_nexthop;
  131         struct  route_in6 ip6po_nhi_route; /* Route to the nexthop */
  132 };
  133 #define ip6po_nexthop   ip6po_nhinfo.ip6po_nhi_nexthop
  134 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route
  135 
  136 struct  ip6_pktopts {
  137         struct  mbuf *ip6po_m;  /* Pointer to mbuf storing the data */
  138         int     ip6po_hlim;     /* Hoplimit for outgoing packets */
  139 
  140         /* Outgoing IF/address information */
  141         struct  in6_pktinfo *ip6po_pktinfo;
  142 
  143         /* Next-hop address information */
  144         struct  ip6po_nhinfo ip6po_nhinfo;
  145 
  146         struct  ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
  147 
  148         /* Destination options header (before a routing header) */
  149         struct  ip6_dest *ip6po_dest1;
  150 
  151         /* Routing header related info. */
  152         struct  ip6po_rhinfo ip6po_rhinfo;
  153 
  154         /* Destination options header (after a routing header) */
  155         struct  ip6_dest *ip6po_dest2;
  156 
  157         int     ip6po_tclass;   /* traffic class */
  158 
  159         int     ip6po_minmtu;  /* fragment vs PMTU discovery policy */
  160 #define IP6PO_MINMTU_MCASTONLY  -1 /* default; send at min MTU for multicast*/
  161 #define IP6PO_MINMTU_DISABLE     0 /* always perform pmtu disc */
  162 #define IP6PO_MINMTU_ALL         1 /* always send at min MTU */
  163 
  164         int     ip6po_prefer_tempaddr;  /* whether temporary addresses are
  165                                            preferred as source address */
  166 #define IP6PO_TEMPADDR_SYSTEM   -1 /* follow the system default */
  167 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */
  168 #define IP6PO_TEMPADDR_PREFER    1 /* prefer temporary address */
  169 
  170         int ip6po_flags;
  171 #if 0   /* parameters in this block is obsolete. do not reuse the values. */
  172 #define IP6PO_REACHCONF 0x01    /* upper-layer reachability confirmation. */
  173 #define IP6PO_MINMTU    0x02    /* use minimum MTU (IPV6_USE_MIN_MTU) */
  174 #endif
  175 #define IP6PO_DONTFRAG  0x04    /* disable fragmentation (IPV6_DONTFRAG) */
  176 #define IP6PO_USECOA    0x08    /* use care of address */
  177 };
  178 
  179 /*
  180  * Control options for incoming packets
  181  */
  182 
  183 struct  ip6stat {
  184         u_quad_t ip6s_total;            /* total packets received */
  185         u_quad_t ip6s_tooshort;         /* packet too short */
  186         u_quad_t ip6s_toosmall;         /* not enough data */
  187         u_quad_t ip6s_fragments;        /* fragments received */
  188         u_quad_t ip6s_fragdropped;      /* frags dropped(dups, out of space) */
  189         u_quad_t ip6s_fragtimeout;      /* fragments timed out */
  190         u_quad_t ip6s_fragoverflow;     /* fragments that exceeded limit */
  191         u_quad_t ip6s_forward;          /* packets forwarded */
  192         u_quad_t ip6s_cantforward;      /* packets rcvd for unreachable dest */
  193         u_quad_t ip6s_redirectsent;     /* packets forwarded on same net */
  194         u_quad_t ip6s_delivered;        /* datagrams delivered to upper level*/
  195         u_quad_t ip6s_localout;         /* total ip packets generated here */
  196         u_quad_t ip6s_odropped;         /* lost packets due to nobufs, etc. */
  197         u_quad_t ip6s_reassembled;      /* total packets reassembled ok */
  198         u_quad_t ip6s_fragmented;       /* datagrams successfully fragmented */
  199         u_quad_t ip6s_ofragments;       /* output fragments created */
  200         u_quad_t ip6s_cantfrag;         /* don't fragment flag was set, etc. */
  201         u_quad_t ip6s_badoptions;       /* error in option processing */
  202         u_quad_t ip6s_noroute;          /* packets discarded due to no route */
  203         u_quad_t ip6s_badvers;          /* ip6 version != 6 */
  204         u_quad_t ip6s_rawout;           /* total raw ip packets generated */
  205         u_quad_t ip6s_badscope;         /* scope error */
  206         u_quad_t ip6s_notmember;        /* don't join this multicast group */
  207         u_quad_t ip6s_nxthist[256];     /* next header history */
  208         u_quad_t ip6s_m1;               /* one mbuf */
  209         u_quad_t ip6s_m2m[32];          /* two or more mbuf */
  210         u_quad_t ip6s_mext1;            /* one ext mbuf */
  211         u_quad_t ip6s_mext2m;           /* two or more ext mbuf */
  212         u_quad_t ip6s_exthdrtoolong;    /* ext hdr are not continuous */
  213         u_quad_t ip6s_nogif;            /* no match gif found */
  214         u_quad_t ip6s_toomanyhdr;       /* discarded due to too many headers */
  215 
  216         /*
  217          * statistics for improvement of the source address selection
  218          * algorithm:
  219          * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
  220          */
  221         /* number of times that address selection fails */
  222         u_quad_t ip6s_sources_none;
  223         /* number of times that an address on the outgoing I/F is chosen */
  224         u_quad_t ip6s_sources_sameif[16];
  225         /* number of times that an address on a non-outgoing I/F is chosen */
  226         u_quad_t ip6s_sources_otherif[16];
  227         /*
  228          * number of times that an address that has the same scope
  229          * from the destination is chosen.
  230          */
  231         u_quad_t ip6s_sources_samescope[16];
  232         /*
  233          * number of times that an address that has a different scope
  234          * from the destination is chosen.
  235          */
  236         u_quad_t ip6s_sources_otherscope[16];
  237         /* number of times that a deprecated address is chosen */
  238         u_quad_t ip6s_sources_deprecated[16];
  239 
  240         /* number of times that each rule of source selection is applied. */
  241         u_quad_t ip6s_sources_rule[16];
  242 };
  243 
  244 #ifdef _KERNEL
  245 #define IP6STAT_ADD(name, val)  V_ip6stat.name += (val)
  246 #define IP6STAT_SUB(name, val)  V_ip6stat.name -= (val)
  247 #define IP6STAT_INC(name)       IP6STAT_ADD(name, 1)
  248 #define IP6STAT_DEC(name)       IP6STAT_SUB(name, 1)
  249 #endif
  250 
  251 #ifdef _KERNEL
  252 /*
  253  * IPv6 onion peeling state.
  254  * it will be initialized when we come into ip6_input().
  255  * XXX do not make it a kitchen sink!
  256  */
  257 struct ip6aux {
  258         u_int32_t ip6a_flags;
  259 #define IP6A_SWAP       0x01            /* swapped home/care-of on packet */
  260 #define IP6A_HASEEN     0x02            /* HA was present */
  261 #define IP6A_BRUID      0x04            /* BR Unique Identifier was present */
  262 #define IP6A_RTALERTSEEN 0x08           /* rtalert present */
  263 
  264         /* ip6.ip6_src */
  265         struct in6_addr ip6a_careof;    /* care-of address of the peer */
  266         struct in6_addr ip6a_home;      /* home address of the peer */
  267         u_int16_t       ip6a_bruid;     /* BR unique identifier */
  268 
  269         /* ip6.ip6_dst */
  270         struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */
  271 
  272         /* rtalert */
  273         u_int16_t ip6a_rtalert;         /* rtalert option value */
  274 
  275         /*
  276          * decapsulation history will be here.
  277          * with IPsec it may not be accurate.
  278          */
  279 };
  280 #endif
  281 
  282 #ifdef _KERNEL
  283 /* flags passed to ip6_output as last parameter */
  284 #define IPV6_UNSPECSRC          0x01    /* allow :: as the source address */
  285 #define IPV6_FORWARDING         0x02    /* most of IPv6 header exists */
  286 #define IPV6_MINMTU             0x04    /* use minimum MTU (IPV6_USE_MIN_MTU) */
  287 
  288 #ifdef __NO_STRICT_ALIGNMENT
  289 #define IP6_HDR_ALIGNED_P(ip)   1
  290 #else
  291 #define IP6_HDR_ALIGNED_P(ip)   ((((intptr_t) (ip)) & 3) == 0)
  292 #endif
  293 
  294 VNET_DECLARE(struct ip6stat, ip6stat);  /* statistics */
  295 VNET_DECLARE(int, ip6_defhlim);         /* default hop limit */
  296 VNET_DECLARE(int, ip6_defmcasthlim);    /* default multicast hop limit */
  297 VNET_DECLARE(int, ip6_forwarding);      /* act as router? */
  298 VNET_DECLARE(int, ip6_use_deprecated);  /* allow deprecated addr as source */
  299 VNET_DECLARE(int, ip6_rr_prune);        /* router renumbering prefix
  300                                          * walk list every 5 sec.    */
  301 VNET_DECLARE(int, ip6_mcast_pmtu);      /* enable pMTU discovery for multicast? */
  302 VNET_DECLARE(int, ip6_v6only);
  303 #define V_ip6stat                       VNET(ip6stat)
  304 #define V_ip6_defhlim                   VNET(ip6_defhlim)
  305 #define V_ip6_defmcasthlim              VNET(ip6_defmcasthlim)
  306 #define V_ip6_forwarding                VNET(ip6_forwarding)
  307 #define V_ip6_use_deprecated            VNET(ip6_use_deprecated)
  308 #define V_ip6_rr_prune                  VNET(ip6_rr_prune)
  309 #define V_ip6_mcast_pmtu                VNET(ip6_mcast_pmtu)
  310 #define V_ip6_v6only                    VNET(ip6_v6only)
  311 
  312 VNET_DECLARE(struct socket *, ip6_mrouter);     /* multicast routing daemon */
  313 VNET_DECLARE(int, ip6_sendredirects);   /* send IP redirects when forwarding? */
  314 VNET_DECLARE(int, ip6_maxfragpackets);  /* Maximum packets in reassembly
  315                                          * queue */
  316 VNET_DECLARE(int, ip6_maxfrags);        /* Maximum fragments in reassembly
  317                                          * queue */
  318 VNET_DECLARE(int, ip6_accept_rtadv);    /* Acts as a host not a router */
  319 VNET_DECLARE(int, ip6_keepfaith);       /* Firewall Aided Internet Translator */
  320 VNET_DECLARE(int, ip6_log_interval);
  321 VNET_DECLARE(time_t, ip6_log_time);
  322 VNET_DECLARE(int, ip6_hdrnestlimit);    /* upper limit of # of extension
  323                                          * headers */
  324 VNET_DECLARE(int, ip6_dad_count);       /* DupAddrDetectionTransmits */
  325 #define V_ip6_mrouter                   VNET(ip6_mrouter)
  326 #define V_ip6_sendredirects             VNET(ip6_sendredirects)
  327 #define V_ip6_maxfragpackets            VNET(ip6_maxfragpackets)
  328 #define V_ip6_maxfrags                  VNET(ip6_maxfrags)
  329 #define V_ip6_accept_rtadv              VNET(ip6_accept_rtadv)
  330 #define V_ip6_keepfaith                 VNET(ip6_keepfaith)
  331 #define V_ip6_log_interval              VNET(ip6_log_interval)
  332 #define V_ip6_log_time                  VNET(ip6_log_time)
  333 #define V_ip6_hdrnestlimit              VNET(ip6_hdrnestlimit)
  334 #define V_ip6_dad_count                 VNET(ip6_dad_count)
  335 
  336 VNET_DECLARE(int, ip6_auto_flowlabel);
  337 VNET_DECLARE(int, ip6_auto_linklocal);
  338 #define V_ip6_auto_flowlabel            VNET(ip6_auto_flowlabel)
  339 #define V_ip6_auto_linklocal            VNET(ip6_auto_linklocal)
  340 
  341 VNET_DECLARE(int, ip6_use_tempaddr);    /* Whether to use temporary addresses */
  342 VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary
  343                                          * addresses in the source address
  344                                          * selection */
  345 #define V_ip6_use_tempaddr              VNET(ip6_use_tempaddr)
  346 #define V_ip6_prefer_tempaddr           VNET(ip6_prefer_tempaddr)
  347 
  348 VNET_DECLARE(int, ip6_use_defzone);     /* Whether to use the default scope
  349                                          * zone when unspecified */
  350 #define V_ip6_use_defzone               VNET(ip6_use_defzone)
  351 
  352 VNET_DECLARE (struct pfil_head, inet6_pfil_hook);       /* packet filter hooks */
  353 #define V_inet6_pfil_hook       VNET(inet6_pfil_hook)
  354 #ifdef IPSTEALTH
  355 VNET_DECLARE(int, ip6stealth);
  356 #define V_ip6stealth                    VNET(ip6stealth)
  357 #endif
  358 
  359 extern struct   pr_usrreqs rip6_usrreqs;
  360 struct sockopt;
  361 
  362 struct inpcb;
  363 
  364 int     icmp6_ctloutput __P((struct socket *, struct sockopt *sopt));
  365 
  366 struct in6_ifaddr;
  367 void    ip6_init __P((void));
  368 #ifdef VIMAGE
  369 void    ip6_destroy __P((void));
  370 #endif
  371 int     ip6proto_register(short);
  372 int     ip6proto_unregister(short);
  373 
  374 void    ip6_input __P((struct mbuf *));
  375 struct in6_ifaddr *ip6_getdstifaddr __P((struct mbuf *));
  376 void    ip6_freepcbopts __P((struct ip6_pktopts *));
  377 
  378 int     ip6_unknown_opt __P((u_int8_t *, struct mbuf *, int));
  379 char *  ip6_get_prevhdr __P((struct mbuf *, int));
  380 int     ip6_nexthdr __P((struct mbuf *, int, int, int *));
  381 int     ip6_lasthdr __P((struct mbuf *, int, int, int *));
  382 
  383 struct ip6aux *ip6_addaux __P((struct mbuf *));
  384 struct ip6aux *ip6_findaux __P((struct mbuf *));
  385 void    ip6_delaux __P((struct mbuf *));
  386 
  387 extern int      (*ip6_mforward)(struct ip6_hdr *, struct ifnet *,
  388     struct mbuf *);
  389 
  390 int     ip6_process_hopopts __P((struct mbuf *, u_int8_t *, int, u_int32_t *,
  391                                  u_int32_t *));
  392 struct mbuf     **ip6_savecontrol_v4(struct inpcb *, struct mbuf *,
  393             struct mbuf **, int *);
  394 void    ip6_savecontrol __P((struct inpcb *, struct mbuf *, struct mbuf **));
  395 void    ip6_notify_pmtu __P((struct inpcb *, struct sockaddr_in6 *,
  396                              u_int32_t *));
  397 int     ip6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
  398 
  399 void    ip6_forward __P((struct mbuf *, int));
  400 
  401 void    ip6_mloopback __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *));
  402 int     ip6_output __P((struct mbuf *, struct ip6_pktopts *,
  403                         struct route_in6 *,
  404                         int,
  405                         struct ip6_moptions *, struct ifnet **,
  406                         struct inpcb *));
  407 int     ip6_ctloutput __P((struct socket *, struct sockopt *));
  408 int     ip6_raw_ctloutput __P((struct socket *, struct sockopt *));
  409 void    ip6_initpktopts __P((struct ip6_pktopts *));
  410 int     ip6_setpktopts __P((struct mbuf *, struct ip6_pktopts *,
  411         struct ip6_pktopts *, struct ucred *, int));
  412 void    ip6_clearpktopts __P((struct ip6_pktopts *, int));
  413 struct ip6_pktopts *ip6_copypktopts __P((struct ip6_pktopts *, int));
  414 int     ip6_optlen __P((struct inpcb *));
  415 
  416 int     route6_input __P((struct mbuf **, int *, int));
  417 
  418 void    frag6_init __P((void));
  419 int     frag6_input __P((struct mbuf **, int *, int));
  420 void    frag6_slowtimo __P((void));
  421 void    frag6_drain __P((void));
  422 
  423 void    rip6_init __P((void));
  424 int     rip6_input __P((struct mbuf **, int *, int));
  425 void    rip6_ctlinput __P((int, struct sockaddr *, void *));
  426 int     rip6_ctloutput __P((struct socket *, struct sockopt *));
  427 int     rip6_output __P((struct mbuf *, ...));
  428 int     rip6_usrreq __P((struct socket *,
  429             int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *));
  430 
  431 int     dest6_input __P((struct mbuf **, int *, int));
  432 int     none_input __P((struct mbuf **, int *, int));
  433 
  434 int     in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *,
  435         struct inpcb *inp, struct route_in6 *, struct ucred *cred,
  436         struct ifnet **, struct in6_addr *);
  437 int in6_selectroute __P((struct sockaddr_in6 *, struct ip6_pktopts *,
  438         struct ip6_moptions *, struct route_in6 *, struct ifnet **,
  439         struct rtentry **));
  440 u_int32_t ip6_randomid __P((void));
  441 u_int32_t ip6_randomflowlabel __P((void));
  442 #endif /* _KERNEL */
  443 
  444 #endif /* !_NETINET6_IP6_VAR_H_ */

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