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: head/sys/netinet6/ip6_var.h 296242 2016-03-01 00:17:14Z glebius $
   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  * IP6 reinjecting structure.
  103  */
  104 struct ip6_direct_ctx {
  105         uint32_t        ip6dc_nxt;      /* next header to process */
  106         uint32_t        ip6dc_off;      /* offset to next header */
  107 };
  108 
  109 /*
  110  * Structure attached to inpcb.in6p_moptions and
  111  * passed to ip6_output when IPv6 multicast options are in use.
  112  * This structure is lazy-allocated.
  113  */
  114 struct ip6_moptions {
  115         struct  ifnet *im6o_multicast_ifp; /* ifp for outgoing multicasts */
  116         u_char  im6o_multicast_hlim;    /* hoplimit for outgoing multicasts */
  117         u_char  im6o_multicast_loop;    /* 1 >= hear sends if a member */
  118         u_short im6o_num_memberships;   /* no. memberships this socket */
  119         u_short im6o_max_memberships;   /* max memberships this socket */
  120         struct  in6_multi **im6o_membership;    /* group memberships */
  121         struct  in6_mfilter *im6o_mfilters;     /* source filters */
  122 };
  123 
  124 /*
  125  * Control options for outgoing packets
  126  */
  127 
  128 /* Routing header related info */
  129 struct  ip6po_rhinfo {
  130         struct  ip6_rthdr *ip6po_rhi_rthdr; /* Routing header */
  131         struct  route_in6 ip6po_rhi_route; /* Route to the 1st hop */
  132 };
  133 #define ip6po_rthdr     ip6po_rhinfo.ip6po_rhi_rthdr
  134 #define ip6po_route     ip6po_rhinfo.ip6po_rhi_route
  135 
  136 /* Nexthop related info */
  137 struct  ip6po_nhinfo {
  138         struct  sockaddr *ip6po_nhi_nexthop;
  139         struct  route_in6 ip6po_nhi_route; /* Route to the nexthop */
  140 };
  141 #define ip6po_nexthop   ip6po_nhinfo.ip6po_nhi_nexthop
  142 #define ip6po_nextroute ip6po_nhinfo.ip6po_nhi_route
  143 
  144 struct  ip6_pktopts {
  145         struct  mbuf *ip6po_m;  /* Pointer to mbuf storing the data */
  146         int     ip6po_hlim;     /* Hoplimit for outgoing packets */
  147 
  148         /* Outgoing IF/address information */
  149         struct  in6_pktinfo *ip6po_pktinfo;
  150 
  151         /* Next-hop address information */
  152         struct  ip6po_nhinfo ip6po_nhinfo;
  153 
  154         struct  ip6_hbh *ip6po_hbh; /* Hop-by-Hop options header */
  155 
  156         /* Destination options header (before a routing header) */
  157         struct  ip6_dest *ip6po_dest1;
  158 
  159         /* Routing header related info. */
  160         struct  ip6po_rhinfo ip6po_rhinfo;
  161 
  162         /* Destination options header (after a routing header) */
  163         struct  ip6_dest *ip6po_dest2;
  164 
  165         int     ip6po_tclass;   /* traffic class */
  166 
  167         int     ip6po_minmtu;  /* fragment vs PMTU discovery policy */
  168 #define IP6PO_MINMTU_MCASTONLY  -1 /* default; send at min MTU for multicast*/
  169 #define IP6PO_MINMTU_DISABLE     0 /* always perform pmtu disc */
  170 #define IP6PO_MINMTU_ALL         1 /* always send at min MTU */
  171 
  172         int     ip6po_prefer_tempaddr;  /* whether temporary addresses are
  173                                            preferred as source address */
  174 #define IP6PO_TEMPADDR_SYSTEM   -1 /* follow the system default */
  175 #define IP6PO_TEMPADDR_NOTPREFER 0 /* not prefer temporary address */
  176 #define IP6PO_TEMPADDR_PREFER    1 /* prefer temporary address */
  177 
  178         int ip6po_flags;
  179 #if 0   /* parameters in this block is obsolete. do not reuse the values. */
  180 #define IP6PO_REACHCONF 0x01    /* upper-layer reachability confirmation. */
  181 #define IP6PO_MINMTU    0x02    /* use minimum MTU (IPV6_USE_MIN_MTU) */
  182 #endif
  183 #define IP6PO_DONTFRAG  0x04    /* disable fragmentation (IPV6_DONTFRAG) */
  184 #define IP6PO_USECOA    0x08    /* use care of address */
  185 };
  186 
  187 /*
  188  * Control options for incoming packets
  189  */
  190 
  191 struct  ip6stat {
  192         uint64_t ip6s_total;            /* total packets received */
  193         uint64_t ip6s_tooshort;         /* packet too short */
  194         uint64_t ip6s_toosmall;         /* not enough data */
  195         uint64_t ip6s_fragments;        /* fragments received */
  196         uint64_t ip6s_fragdropped;      /* frags dropped(dups, out of space) */
  197         uint64_t ip6s_fragtimeout;      /* fragments timed out */
  198         uint64_t ip6s_fragoverflow;     /* fragments that exceeded limit */
  199         uint64_t ip6s_forward;          /* packets forwarded */
  200         uint64_t ip6s_cantforward;      /* packets rcvd for unreachable dest */
  201         uint64_t ip6s_redirectsent;     /* packets forwarded on same net */
  202         uint64_t ip6s_delivered;        /* datagrams delivered to upper level*/
  203         uint64_t ip6s_localout;         /* total ip packets generated here */
  204         uint64_t ip6s_odropped;         /* lost packets due to nobufs, etc. */
  205         uint64_t ip6s_reassembled;      /* total packets reassembled ok */
  206         uint64_t ip6s_fragmented;       /* datagrams successfully fragmented */
  207         uint64_t ip6s_ofragments;       /* output fragments created */
  208         uint64_t ip6s_cantfrag;         /* don't fragment flag was set, etc. */
  209         uint64_t ip6s_badoptions;       /* error in option processing */
  210         uint64_t ip6s_noroute;          /* packets discarded due to no route */
  211         uint64_t ip6s_badvers;          /* ip6 version != 6 */
  212         uint64_t ip6s_rawout;           /* total raw ip packets generated */
  213         uint64_t ip6s_badscope;         /* scope error */
  214         uint64_t ip6s_notmember;        /* don't join this multicast group */
  215 #define IP6S_HDRCNT             256     /* headers count */
  216         uint64_t ip6s_nxthist[IP6S_HDRCNT]; /* next header history */
  217         uint64_t ip6s_m1;               /* one mbuf */
  218 #define IP6S_M2MMAX             32
  219         uint64_t ip6s_m2m[IP6S_M2MMAX]; /* two or more mbuf */
  220         uint64_t ip6s_mext1;            /* one ext mbuf */
  221         uint64_t ip6s_mext2m;           /* two or more ext mbuf */
  222         uint64_t ip6s_exthdrtoolong;    /* ext hdr are not contiguous */
  223         uint64_t ip6s_nogif;            /* no match gif found */
  224         uint64_t ip6s_toomanyhdr;       /* discarded due to too many headers */
  225 
  226         /*
  227          * statistics for improvement of the source address selection
  228          * algorithm:
  229          * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
  230          */
  231 #define IP6S_RULESMAX           16
  232 #define IP6S_SCOPECNT           16
  233         /* number of times that address selection fails */
  234         uint64_t ip6s_sources_none;
  235         /* number of times that an address on the outgoing I/F is chosen */
  236         uint64_t ip6s_sources_sameif[IP6S_SCOPECNT];
  237         /* number of times that an address on a non-outgoing I/F is chosen */
  238         uint64_t ip6s_sources_otherif[IP6S_SCOPECNT];
  239         /*
  240          * number of times that an address that has the same scope
  241          * from the destination is chosen.
  242          */
  243         uint64_t ip6s_sources_samescope[IP6S_SCOPECNT];
  244         /*
  245          * number of times that an address that has a different scope
  246          * from the destination is chosen.
  247          */
  248         uint64_t ip6s_sources_otherscope[IP6S_SCOPECNT];
  249         /* number of times that a deprecated address is chosen */
  250         uint64_t ip6s_sources_deprecated[IP6S_SCOPECNT];
  251 
  252         /* number of times that each rule of source selection is applied. */
  253         uint64_t ip6s_sources_rule[IP6S_RULESMAX];
  254 };
  255 
  256 #ifdef _KERNEL
  257 #include <sys/counter.h>
  258 
  259 VNET_PCPUSTAT_DECLARE(struct ip6stat, ip6stat);
  260 #define IP6STAT_ADD(name, val)  \
  261     VNET_PCPUSTAT_ADD(struct ip6stat, ip6stat, name, (val))
  262 #define IP6STAT_SUB(name, val)  IP6STAT_ADD(name, -(val))
  263 #define IP6STAT_INC(name)       IP6STAT_ADD(name, 1)
  264 #define IP6STAT_DEC(name)       IP6STAT_SUB(name, 1)
  265 #endif
  266 
  267 #ifdef _KERNEL
  268 /* flags passed to ip6_output as last parameter */
  269 #define IPV6_UNSPECSRC          0x01    /* allow :: as the source address */
  270 #define IPV6_FORWARDING         0x02    /* most of IPv6 header exists */
  271 #define IPV6_MINMTU             0x04    /* use minimum MTU (IPV6_USE_MIN_MTU) */
  272 
  273 #ifdef __NO_STRICT_ALIGNMENT
  274 #define IP6_HDR_ALIGNED_P(ip)   1
  275 #else
  276 #define IP6_HDR_ALIGNED_P(ip)   ((((intptr_t) (ip)) & 3) == 0)
  277 #endif
  278 
  279 VNET_DECLARE(int, ip6_defhlim);         /* default hop limit */
  280 VNET_DECLARE(int, ip6_defmcasthlim);    /* default multicast hop limit */
  281 VNET_DECLARE(int, ip6_forwarding);      /* act as router? */
  282 VNET_DECLARE(int, ip6_use_deprecated);  /* allow deprecated addr as source */
  283 VNET_DECLARE(int, ip6_rr_prune);        /* router renumbering prefix
  284                                          * walk list every 5 sec.    */
  285 VNET_DECLARE(int, ip6_mcast_pmtu);      /* enable pMTU discovery for multicast? */
  286 VNET_DECLARE(int, ip6_v6only);
  287 #define V_ip6_defhlim                   VNET(ip6_defhlim)
  288 #define V_ip6_defmcasthlim              VNET(ip6_defmcasthlim)
  289 #define V_ip6_forwarding                VNET(ip6_forwarding)
  290 #define V_ip6_use_deprecated            VNET(ip6_use_deprecated)
  291 #define V_ip6_rr_prune                  VNET(ip6_rr_prune)
  292 #define V_ip6_mcast_pmtu                VNET(ip6_mcast_pmtu)
  293 #define V_ip6_v6only                    VNET(ip6_v6only)
  294 
  295 VNET_DECLARE(struct socket *, ip6_mrouter);     /* multicast routing daemon */
  296 VNET_DECLARE(int, ip6_sendredirects);   /* send IP redirects when forwarding? */
  297 VNET_DECLARE(int, ip6_maxfragpackets);  /* Maximum packets in reassembly
  298                                          * queue */
  299 VNET_DECLARE(int, ip6_maxfrags);        /* Maximum fragments in reassembly
  300                                          * queue */
  301 VNET_DECLARE(int, ip6_accept_rtadv);    /* Acts as a host not a router */
  302 VNET_DECLARE(int, ip6_no_radr);         /* No defroute from RA */
  303 VNET_DECLARE(int, ip6_norbit_raif);     /* Disable R-bit in NA on RA
  304                                          * receiving IF. */
  305 VNET_DECLARE(int, ip6_rfc6204w3);       /* Accept defroute from RA even when
  306                                            forwarding enabled */
  307 VNET_DECLARE(int, ip6_log_interval);
  308 VNET_DECLARE(time_t, ip6_log_time);
  309 VNET_DECLARE(int, ip6_hdrnestlimit);    /* upper limit of # of extension
  310                                          * headers */
  311 VNET_DECLARE(int, ip6_dad_count);       /* DupAddrDetectionTransmits */
  312 #define V_ip6_mrouter                   VNET(ip6_mrouter)
  313 #define V_ip6_sendredirects             VNET(ip6_sendredirects)
  314 #define V_ip6_maxfragpackets            VNET(ip6_maxfragpackets)
  315 #define V_ip6_maxfrags                  VNET(ip6_maxfrags)
  316 #define V_ip6_accept_rtadv              VNET(ip6_accept_rtadv)
  317 #define V_ip6_no_radr                   VNET(ip6_no_radr)
  318 #define V_ip6_norbit_raif               VNET(ip6_norbit_raif)
  319 #define V_ip6_rfc6204w3                 VNET(ip6_rfc6204w3)
  320 #define V_ip6_log_interval              VNET(ip6_log_interval)
  321 #define V_ip6_log_time                  VNET(ip6_log_time)
  322 #define V_ip6_hdrnestlimit              VNET(ip6_hdrnestlimit)
  323 #define V_ip6_dad_count                 VNET(ip6_dad_count)
  324 
  325 VNET_DECLARE(int, ip6_auto_flowlabel);
  326 VNET_DECLARE(int, ip6_auto_linklocal);
  327 #define V_ip6_auto_flowlabel            VNET(ip6_auto_flowlabel)
  328 #define V_ip6_auto_linklocal            VNET(ip6_auto_linklocal)
  329 
  330 VNET_DECLARE(int, ip6_use_tempaddr);    /* Whether to use temporary addresses */
  331 VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary
  332                                          * addresses in the source address
  333                                          * selection */
  334 #define V_ip6_use_tempaddr              VNET(ip6_use_tempaddr)
  335 #define V_ip6_prefer_tempaddr           VNET(ip6_prefer_tempaddr)
  336 
  337 VNET_DECLARE(int, ip6_use_defzone);     /* Whether to use the default scope
  338                                          * zone when unspecified */
  339 #define V_ip6_use_defzone               VNET(ip6_use_defzone)
  340 
  341 VNET_DECLARE (struct pfil_head, inet6_pfil_hook);       /* packet filter hooks */
  342 #define V_inet6_pfil_hook       VNET(inet6_pfil_hook)
  343 #ifdef IPSTEALTH
  344 VNET_DECLARE(int, ip6stealth);
  345 #define V_ip6stealth                    VNET(ip6stealth)
  346 #endif
  347 
  348 extern struct   pr_usrreqs rip6_usrreqs;
  349 struct sockopt;
  350 
  351 struct inpcb;
  352 
  353 int     icmp6_ctloutput(struct socket *, struct sockopt *sopt);
  354 
  355 struct in6_ifaddr;
  356 void    ip6_init(void);
  357 #ifdef VIMAGE
  358 void    ip6_destroy(void);
  359 #endif
  360 int     ip6proto_register(short);
  361 int     ip6proto_unregister(short);
  362 
  363 void    ip6_input(struct mbuf *);
  364 void    ip6_direct_input(struct mbuf *);
  365 void    ip6_freepcbopts(struct ip6_pktopts *);
  366 
  367 int     ip6_unknown_opt(u_int8_t *, struct mbuf *, int);
  368 char *  ip6_get_prevhdr(const struct mbuf *, int);
  369 int     ip6_nexthdr(const struct mbuf *, int, int, int *);
  370 int     ip6_lasthdr(const struct mbuf *, int, int, int *);
  371 
  372 extern int      (*ip6_mforward)(struct ip6_hdr *, struct ifnet *,
  373     struct mbuf *);
  374 
  375 int     ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
  376                                  u_int32_t *);
  377 struct mbuf     **ip6_savecontrol_v4(struct inpcb *, struct mbuf *,
  378             struct mbuf **, int *);
  379 void    ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **);
  380 void    ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *, u_int32_t);
  381 int     ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
  382 
  383 void    ip6_forward(struct mbuf *, int);
  384 
  385 void    ip6_mloopback(struct ifnet *, struct mbuf *);
  386 int     ip6_output(struct mbuf *, struct ip6_pktopts *,
  387                         struct route_in6 *,
  388                         int,
  389                         struct ip6_moptions *, struct ifnet **,
  390                         struct inpcb *);
  391 int     ip6_ctloutput(struct socket *, struct sockopt *);
  392 int     ip6_raw_ctloutput(struct socket *, struct sockopt *);
  393 void    ip6_initpktopts(struct ip6_pktopts *);
  394 int     ip6_setpktopts(struct mbuf *, struct ip6_pktopts *,
  395         struct ip6_pktopts *, struct ucred *, int);
  396 void    ip6_clearpktopts(struct ip6_pktopts *, int);
  397 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int);
  398 int     ip6_optlen(struct inpcb *);
  399 int     ip6_deletefraghdr(struct mbuf *, int, int);
  400 int     ip6_fragment(struct ifnet *, struct mbuf *, int, u_char, int,
  401                         uint32_t);
  402 
  403 int     route6_input(struct mbuf **, int *, int);
  404 
  405 void    frag6_init(void);
  406 int     frag6_input(struct mbuf **, int *, int);
  407 void    frag6_slowtimo(void);
  408 void    frag6_drain(void);
  409 
  410 void    rip6_init(void);
  411 int     rip6_input(struct mbuf **, int *, int);
  412 void    rip6_ctlinput(int, struct sockaddr *, void *);
  413 int     rip6_ctloutput(struct socket *, struct sockopt *);
  414 int     rip6_output(struct mbuf *, struct socket *, ...);
  415 int     rip6_usrreq(struct socket *,
  416             int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *);
  417 
  418 int     dest6_input(struct mbuf **, int *, int);
  419 int     none_input(struct mbuf **, int *, int);
  420 
  421 int     in6_selectsrc_socket(struct sockaddr_in6 *, struct ip6_pktopts *,
  422     struct inpcb *, struct ucred *, int, struct in6_addr *, int *);
  423 int     in6_selectsrc_addr(uint32_t, const struct in6_addr *,
  424     uint32_t, struct ifnet *, struct in6_addr *, int *);
  425 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *,
  426         struct ip6_moptions *, struct route_in6 *, struct ifnet **,
  427         struct rtentry **);
  428 int     in6_selectroute_fib(struct sockaddr_in6 *, struct ip6_pktopts *,
  429             struct ip6_moptions *, struct route_in6 *, struct ifnet **,
  430             struct rtentry **, u_int);
  431 u_int32_t ip6_randomid(void);
  432 u_int32_t ip6_randomflowlabel(void);
  433 void in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset);
  434 #endif /* _KERNEL */
  435 
  436 #endif /* !_NETINET6_IP6_VAR_H_ */

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