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  * $FreeBSD$
   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 #define IP6S_HDRCNT             256     /* headers count */
  208         u_quad_t ip6s_nxthist[IP6S_HDRCNT]; /* next header history */
  209         u_quad_t ip6s_m1;               /* one mbuf */
  210 #define IP6S_M2MMAX             32
  211         u_quad_t ip6s_m2m[IP6S_M2MMAX]; /* two or more mbuf */
  212         u_quad_t ip6s_mext1;            /* one ext mbuf */
  213         u_quad_t ip6s_mext2m;           /* two or more ext mbuf */
  214         u_quad_t ip6s_exthdrtoolong;    /* ext hdr are not contiguous */
  215         u_quad_t ip6s_nogif;            /* no match gif found */
  216         u_quad_t ip6s_toomanyhdr;       /* discarded due to too many headers */
  217 
  218         /*
  219          * statistics for improvement of the source address selection
  220          * algorithm:
  221          * XXX: hardcoded 16 = # of ip6 multicast scope types + 1
  222          */
  223 #define IP6S_RULESMAX           16
  224 #define IP6S_SCOPECNT           16
  225         /* number of times that address selection fails */
  226         u_quad_t ip6s_sources_none;
  227         /* number of times that an address on the outgoing I/F is chosen */
  228         u_quad_t ip6s_sources_sameif[IP6S_SCOPECNT];
  229         /* number of times that an address on a non-outgoing I/F is chosen */
  230         u_quad_t ip6s_sources_otherif[IP6S_SCOPECNT];
  231         /*
  232          * number of times that an address that has the same scope
  233          * from the destination is chosen.
  234          */
  235         u_quad_t ip6s_sources_samescope[IP6S_SCOPECNT];
  236         /*
  237          * number of times that an address that has a different scope
  238          * from the destination is chosen.
  239          */
  240         u_quad_t ip6s_sources_otherscope[IP6S_SCOPECNT];
  241         /* number of times that a deprecated address is chosen */
  242         u_quad_t ip6s_sources_deprecated[IP6S_SCOPECNT];
  243 
  244         /* number of times that each rule of source selection is applied. */
  245         u_quad_t ip6s_sources_rule[IP6S_RULESMAX];
  246 };
  247 
  248 #ifdef _KERNEL
  249 #define IP6STAT_ADD(name, val)  V_ip6stat.name += (val)
  250 #define IP6STAT_SUB(name, val)  V_ip6stat.name -= (val)
  251 #define IP6STAT_INC(name)       IP6STAT_ADD(name, 1)
  252 #define IP6STAT_DEC(name)       IP6STAT_SUB(name, 1)
  253 #endif
  254 
  255 #ifdef _KERNEL
  256 /*
  257  * IPv6 onion peeling state.
  258  * it will be initialized when we come into ip6_input().
  259  * XXX do not make it a kitchen sink!
  260  */
  261 struct ip6aux {
  262         u_int32_t ip6a_flags;
  263 #define IP6A_SWAP       0x01            /* swapped home/care-of on packet */
  264 #define IP6A_HASEEN     0x02            /* HA was present */
  265 #define IP6A_BRUID      0x04            /* BR Unique Identifier was present */
  266 #define IP6A_RTALERTSEEN 0x08           /* rtalert present */
  267 
  268         /* ip6.ip6_src */
  269         struct in6_addr ip6a_careof;    /* care-of address of the peer */
  270         struct in6_addr ip6a_home;      /* home address of the peer */
  271         u_int16_t       ip6a_bruid;     /* BR unique identifier */
  272 
  273         /* ip6.ip6_dst */
  274         struct in6_ifaddr *ip6a_dstia6; /* my ifaddr that matches ip6_dst */
  275 
  276         /* rtalert */
  277         u_int16_t ip6a_rtalert;         /* rtalert option value */
  278 
  279         /*
  280          * decapsulation history will be here.
  281          * with IPsec it may not be accurate.
  282          */
  283 };
  284 #endif
  285 
  286 #ifdef _KERNEL
  287 /* flags passed to ip6_output as last parameter */
  288 #define IPV6_UNSPECSRC          0x01    /* allow :: as the source address */
  289 #define IPV6_FORWARDING         0x02    /* most of IPv6 header exists */
  290 #define IPV6_MINMTU             0x04    /* use minimum MTU (IPV6_USE_MIN_MTU) */
  291 
  292 #define M_IP6_NEXTHOP           M_PROTO7        /* explicit ip nexthop */
  293 
  294 #ifdef __NO_STRICT_ALIGNMENT
  295 #define IP6_HDR_ALIGNED_P(ip)   1
  296 #else
  297 #define IP6_HDR_ALIGNED_P(ip)   ((((intptr_t) (ip)) & 3) == 0)
  298 #endif
  299 
  300 VNET_DECLARE(struct ip6stat, ip6stat);  /* statistics */
  301 VNET_DECLARE(int, ip6_defhlim);         /* default hop limit */
  302 VNET_DECLARE(int, ip6_defmcasthlim);    /* default multicast hop limit */
  303 VNET_DECLARE(int, ip6_forwarding);      /* act as router? */
  304 VNET_DECLARE(int, ip6_use_deprecated);  /* allow deprecated addr as source */
  305 VNET_DECLARE(int, ip6_rr_prune);        /* router renumbering prefix
  306                                          * walk list every 5 sec.    */
  307 VNET_DECLARE(int, ip6_mcast_pmtu);      /* enable pMTU discovery for multicast? */
  308 VNET_DECLARE(int, ip6_v6only);
  309 #define V_ip6stat                       VNET(ip6stat)
  310 #define V_ip6_defhlim                   VNET(ip6_defhlim)
  311 #define V_ip6_defmcasthlim              VNET(ip6_defmcasthlim)
  312 #define V_ip6_forwarding                VNET(ip6_forwarding)
  313 #define V_ip6_use_deprecated            VNET(ip6_use_deprecated)
  314 #define V_ip6_rr_prune                  VNET(ip6_rr_prune)
  315 #define V_ip6_mcast_pmtu                VNET(ip6_mcast_pmtu)
  316 #define V_ip6_v6only                    VNET(ip6_v6only)
  317 
  318 VNET_DECLARE(struct socket *, ip6_mrouter);     /* multicast routing daemon */
  319 VNET_DECLARE(int, ip6_sendredirects);   /* send IP redirects when forwarding? */
  320 VNET_DECLARE(int, ip6_maxfragpackets);  /* Maximum packets in reassembly
  321                                          * queue */
  322 VNET_DECLARE(int, ip6_maxfrags);        /* Maximum fragments in reassembly
  323                                          * queue */
  324 VNET_DECLARE(int, ip6_accept_rtadv);    /* Acts as a host not a router */
  325 VNET_DECLARE(int, ip6_no_radr);         /* No defroute from RA */
  326 VNET_DECLARE(int, ip6_norbit_raif);     /* Disable R-bit in NA on RA
  327                                          * receiving IF. */
  328 VNET_DECLARE(int, ip6_rfc6204w3);       /* Accept defroute from RA even when
  329                                            forwarding enabled */
  330 VNET_DECLARE(int, ip6_keepfaith);       /* Firewall Aided Internet Translator */
  331 VNET_DECLARE(int, ip6_log_interval);
  332 VNET_DECLARE(time_t, ip6_log_time);
  333 VNET_DECLARE(int, ip6_hdrnestlimit);    /* upper limit of # of extension
  334                                          * headers */
  335 VNET_DECLARE(int, ip6_dad_count);       /* DupAddrDetectionTransmits */
  336 #define V_ip6_mrouter                   VNET(ip6_mrouter)
  337 #define V_ip6_sendredirects             VNET(ip6_sendredirects)
  338 #define V_ip6_maxfragpackets            VNET(ip6_maxfragpackets)
  339 #define V_ip6_maxfrags                  VNET(ip6_maxfrags)
  340 #define V_ip6_accept_rtadv              VNET(ip6_accept_rtadv)
  341 #define V_ip6_no_radr                   VNET(ip6_no_radr)
  342 #define V_ip6_norbit_raif               VNET(ip6_norbit_raif)
  343 #define V_ip6_rfc6204w3                 VNET(ip6_rfc6204w3)
  344 #define V_ip6_keepfaith                 VNET(ip6_keepfaith)
  345 #define V_ip6_log_interval              VNET(ip6_log_interval)
  346 #define V_ip6_log_time                  VNET(ip6_log_time)
  347 #define V_ip6_hdrnestlimit              VNET(ip6_hdrnestlimit)
  348 #define V_ip6_dad_count                 VNET(ip6_dad_count)
  349 
  350 VNET_DECLARE(int, ip6_auto_flowlabel);
  351 VNET_DECLARE(int, ip6_auto_linklocal);
  352 #define V_ip6_auto_flowlabel            VNET(ip6_auto_flowlabel)
  353 #define V_ip6_auto_linklocal            VNET(ip6_auto_linklocal)
  354 
  355 VNET_DECLARE(int, ip6_use_tempaddr);    /* Whether to use temporary addresses */
  356 VNET_DECLARE(int, ip6_prefer_tempaddr); /* Whether to prefer temporary
  357                                          * addresses in the source address
  358                                          * selection */
  359 #define V_ip6_use_tempaddr              VNET(ip6_use_tempaddr)
  360 #define V_ip6_prefer_tempaddr           VNET(ip6_prefer_tempaddr)
  361 
  362 VNET_DECLARE(int, ip6_use_defzone);     /* Whether to use the default scope
  363                                          * zone when unspecified */
  364 #define V_ip6_use_defzone               VNET(ip6_use_defzone)
  365 
  366 VNET_DECLARE (struct pfil_head, inet6_pfil_hook);       /* packet filter hooks */
  367 #define V_inet6_pfil_hook       VNET(inet6_pfil_hook)
  368 #ifdef IPSTEALTH
  369 VNET_DECLARE(int, ip6stealth);
  370 #define V_ip6stealth                    VNET(ip6stealth)
  371 #endif
  372 
  373 extern struct   pr_usrreqs rip6_usrreqs;
  374 struct sockopt;
  375 
  376 struct inpcb;
  377 
  378 int     icmp6_ctloutput(struct socket *, struct sockopt *sopt);
  379 
  380 struct in6_ifaddr;
  381 void    ip6_init(void);
  382 #ifdef VIMAGE
  383 void    ip6_destroy(void);
  384 #endif
  385 int     ip6proto_register(short);
  386 int     ip6proto_unregister(short);
  387 
  388 void    ip6_input(struct mbuf *);
  389 struct in6_ifaddr *ip6_getdstifaddr(struct mbuf *);
  390 void    ip6_freepcbopts(struct ip6_pktopts *);
  391 
  392 int     ip6_unknown_opt(u_int8_t *, struct mbuf *, int);
  393 char *  ip6_get_prevhdr(struct mbuf *, int);
  394 int     ip6_nexthdr(struct mbuf *, int, int, int *);
  395 int     ip6_lasthdr(struct mbuf *, int, int, int *);
  396 
  397 #ifdef __notyet__
  398 struct ip6aux *ip6_findaux(struct mbuf *);
  399 #endif
  400 
  401 extern int      (*ip6_mforward)(struct ip6_hdr *, struct ifnet *,
  402     struct mbuf *);
  403 
  404 int     ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *,
  405                                  u_int32_t *);
  406 struct mbuf     **ip6_savecontrol_v4(struct inpcb *, struct mbuf *,
  407             struct mbuf **, int *);
  408 void    ip6_savecontrol(struct inpcb *, struct mbuf *, struct mbuf **);
  409 void    ip6_notify_pmtu(struct inpcb *, struct sockaddr_in6 *, u_int32_t);
  410 int     ip6_sysctl(int *, u_int, void *, size_t *, void *, size_t);
  411 
  412 void    ip6_forward(struct mbuf *, int);
  413 
  414 void    ip6_mloopback(struct ifnet *, struct mbuf *, struct sockaddr_in6 *);
  415 int     ip6_output(struct mbuf *, struct ip6_pktopts *,
  416                         struct route_in6 *,
  417                         int,
  418                         struct ip6_moptions *, struct ifnet **,
  419                         struct inpcb *);
  420 int     ip6_ctloutput(struct socket *, struct sockopt *);
  421 int     ip6_raw_ctloutput(struct socket *, struct sockopt *);
  422 void    ip6_initpktopts(struct ip6_pktopts *);
  423 int     ip6_setpktopts(struct mbuf *, struct ip6_pktopts *,
  424         struct ip6_pktopts *, struct ucred *, int);
  425 void    ip6_clearpktopts(struct ip6_pktopts *, int);
  426 struct ip6_pktopts *ip6_copypktopts(struct ip6_pktopts *, int);
  427 int     ip6_optlen(struct inpcb *);
  428 
  429 int     route6_input(struct mbuf **, int *, int);
  430 
  431 void    frag6_init(void);
  432 int     frag6_input(struct mbuf **, int *, int);
  433 void    frag6_slowtimo(void);
  434 void    frag6_drain(void);
  435 
  436 void    rip6_init(void);
  437 int     rip6_input(struct mbuf **, int *, int);
  438 void    rip6_ctlinput(int, struct sockaddr *, void *);
  439 int     rip6_ctloutput(struct socket *, struct sockopt *);
  440 int     rip6_output(struct mbuf *, ...);
  441 int     rip6_usrreq(struct socket *,
  442             int, struct mbuf *, struct mbuf *, struct mbuf *, struct thread *);
  443 
  444 int     dest6_input(struct mbuf **, int *, int);
  445 int     none_input(struct mbuf **, int *, int);
  446 
  447 int     in6_selectsrc(struct sockaddr_in6 *, struct ip6_pktopts *,
  448         struct inpcb *inp, struct route_in6 *, struct ucred *cred,
  449         struct ifnet **, struct in6_addr *);
  450 int in6_selectroute(struct sockaddr_in6 *, struct ip6_pktopts *,
  451         struct ip6_moptions *, struct route_in6 *, struct ifnet **,
  452         struct rtentry **);
  453 int     in6_selectroute_fib(struct sockaddr_in6 *, struct ip6_pktopts *,
  454             struct ip6_moptions *, struct route_in6 *, struct ifnet **,
  455             struct rtentry **, u_int);
  456 u_int32_t ip6_randomid(void);
  457 u_int32_t ip6_randomflowlabel(void);
  458 void in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset);
  459 #endif /* _KERNEL */
  460 
  461 #endif /* !_NETINET6_IP6_VAR_H_ */

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