network_cmds/rtadvd.tproj/rtadvd.h

   1 /*      $KAME: rtadvd.h,v 1.26 2003/08/05 12:34:23 itojun Exp $ */
   2
   3 /*
   4  * Copyright (C) 1998 WIDE Project.
   5  * Copyright (C) 2011 Hiroki Sato <hrs@FreeBSD.org>
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the project nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32 #include "rtadvd_logging.h"
  33
  34 #define ELM_MALLOC(p, error_action)                                     \
  35         do {                                                            \
  36                 p = malloc(sizeof(*p));                                 \
  37                 if (p == NULL) {                                        \
  38                         errorlog("<%s> malloc failed: %s",      \
  39                             __func__, strerror(errno));                 \
  40                         error_action;                                   \
  41                 }                                                       \
  42                 memset(p, 0, sizeof(*p));                               \
  43         } while(0)
  44
  45 #define ROUTEINFO       1
  46
  47 #define ALLNODES "ff02::1"
  48 #define ALLROUTERS_LINK "ff02::2"
  49 #define ALLROUTERS_SITE "ff05::2"
  50 #define ANY "::"
  51 #define RTSOLLEN 8
  52
  53 /* protocol constants and default values */
  54 #define DEF_MAXRTRADVINTERVAL 600
  55 #define DEF_ADVLINKMTU 0
  56 #define DEF_ADVREACHABLETIME 0
  57 #define DEF_ADVRETRANSTIMER 0
  58 #define DEF_ADVCURHOPLIMIT 64
  59 #define DEF_ADVVALIDLIFETIME 2592000
  60 #define DEF_ADVPREFERREDLIFETIME 604800
  61
  62 #define MAXROUTERLIFETIME 9000
  63 #define MIN_MAXINTERVAL 4
  64 #define MAX_MAXINTERVAL 1800
  65 #define MIN_MININTERVAL 3
  66 #define MAXREACHABLETIME 3600000
  67
  68 #define MAX_INITIAL_RTR_ADVERT_INTERVAL  16
  69 #define MAX_INITIAL_RTR_ADVERTISEMENTS    3
  70 #define MAX_FINAL_RTR_ADVERTISEMENTS      1
  71 #define MIN_DELAY_BETWEEN_RAS             3
  72 #define MAX_RA_DELAY_TIME                 500000 /* usec */
  73
  74 #define PREFIX_FROM_KERNEL 1
  75 #define PREFIX_FROM_CONFIG 2
  76 #define PREFIX_FROM_DYNAMIC 3
  77
  78 struct prefix {
  79         struct prefix *next;    /* forward link */
  80         struct prefix *prev;    /* previous link */
  81
  82         struct rainfo *rainfo;  /* back pointer to the interface */
  83
  84         struct rtadvd_timer *timer; /* expiration timer.  used when a prefix
  85                                      * derived from the kernel is deleted.
  86                                      */
  87
  88         u_int32_t validlifetime; /* AdvValidLifetime */
  89         long    vltimeexpire;   /* expiration of vltime; decrement case only */
  90         u_int32_t preflifetime; /* AdvPreferredLifetime */
  91         long    pltimeexpire;   /* expiration of pltime; decrement case only */
  92         u_int onlinkflg;        /* bool: AdvOnLinkFlag */
  93         u_int autoconfflg;      /* bool: AdvAutonomousFlag */
  94         int prefixlen;
  95         int origin;             /* from kernel or config */
  96         struct in6_addr prefix;
  97 };
  98
  99 #ifdef ROUTEINFO
 100 struct rtinfo {
 101         struct rtinfo *prev;    /* previous link */
 102         struct rtinfo *next;    /* forward link */
 103
 104         u_int32_t ltime;        /* route lifetime */
 105         u_int rtpref;           /* route preference */
 106         int prefixlen;
 107         struct in6_addr prefix;
 108 };
 109 #endif
 110
 111 struct soliciter {
 112         struct soliciter *next;
 113         struct sockaddr_in6 addr;
 114 };
 115
 116 struct rdnss {
 117         struct rdnss *next;     /* forward link */
 118         struct rdnss *prev;     /* previous link */
 119
 120         struct in6_addr addr;
 121 };
 122
 123 struct dnssl {
 124         struct dnssl *next;
 125         struct dnssl *prev;
 126
 127         char domain[1];
 128 };
 129
 130 struct  rainfo {
 131         /* pointer for list */
 132         struct  rainfo *next;
 133
 134         /* timer related parameters */
 135         struct rtadvd_timer *timer;
 136         int initcounter; /* counter for the first few advertisements */
 137         struct timeval lastsent; /* timestamp when the latest RA was sent */
 138         int waiting;            /* number of RS waiting for RA */
 139
 140         /* interface information */
 141         int     ifindex;
 142         int     advlinkopt;     /* bool: whether include link-layer addr opt */
 143         struct sockaddr_dl *sdl;
 144         char    ifname[16];
 145         int     phymtu;         /* mtu of the physical interface */
 146
 147         /* Router configuration variables */
 148         u_short lifetime;       /* AdvDefaultLifetime */
 149         u_int   maxinterval;    /* MaxRtrAdvInterval */
 150         u_int   mininterval;    /* MinRtrAdvInterval */
 151         int     managedflg;     /* AdvManagedFlag */
 152         int     otherflg;       /* AdvOtherConfigFlag */
 153
 154         int     rtpref;         /* router preference */
 155         u_int32_t linkmtu;      /* AdvLinkMTU */
 156         u_int32_t reachabletime; /* AdvReachableTime */
 157         u_int32_t retranstimer; /* AdvRetransTimer */
 158         u_int   hoplimit;       /* AdvCurHopLimit */
 159         struct prefix prefix;   /* AdvPrefixList(link head) */
 160         int     pfxs;           /* number of prefixes */
 161         long    clockskew;      /* used for consisitency check of lifetimes */
 162
 163 #ifdef ROUTEINFO
 164         struct rtinfo route;    /* route information option (link head) */
 165         int     routes;         /* number of route information options */
 166 #endif
 167
 168         /* Recursive DNS Servers RFC5006 */
 169         struct rdnss rdnss_list;
 170         int rdnss_length;
 171         u_int32_t rdnss_lifetime;
 172
 173         /* DNS Search List RFC6106 */
 174         struct dnssl dnssl_list;
 175         int dnssl_length;
 176         u_int32_t dnssl_lifetime;
 177         u_int32_t dnssl_option_length;
 178
 179         /* Captive Portal RFC 7710 */
 180         char *  capport;
 181         u_int32_t capport_length;
 182         u_int32_t capport_option_length;
 183
 184         /* actual RA packet data and its length */
 185         size_t ra_datalen;
 186         u_char *ra_data;
 187
 188         /* statistics */
 189         u_quad_t raoutput;      /* number of RAs sent */
 190         u_quad_t rainput;       /* number of RAs received */
 191         u_quad_t rainconsistent; /* number of RAs inconsistent with ours */
 192         u_quad_t rsinput;       /* number of RSs received */
 193
 194         /* info about soliciter */
 195         struct soliciter *soliciter;    /* recent solication source */
 196 };
 197
 198 struct rtadvd_timer *ra_timeout(void *);
 199 void ra_timer_update(void *, struct timeval *);
 200
 201 int prefix_match(struct in6_addr *, int, struct in6_addr *, int);
 202 struct rainfo *if_indextorainfo(int);
 203 struct prefix *find_prefix(struct rainfo *, struct in6_addr *, int);
 204
 205 extern struct in6_addr in6a_site_allrouters;