release/src/router/radvd/radvd.h

   1 /*
   2  *   $Id: radvd.h,v 1.42 2011/04/28 15:08:40 reubenhwk Exp $
   3  *
   4  *   Authors:
   5  *    Pedro Roque               <roque@di.fc.ul.pt>
   6  *    Lars Fenneberg            <lf@elemental.net>
   7  *
   8  *   This software is Copyright 1996,1997 by the above mentioned author(s),
   9  *   All Rights Reserved.
  10  *
  11  *   The license which is distributed with this software in the file COPYRIGHT
  12  *   applies to this software. If your distribution is missing this file, you
  13  *   may request it from <pekkas@netcore.fi>.
  14  *
  15  */
  16
  17 #ifndef RADV_H
  18 #define RADV_H
  19
  20 #include "config.h"
  21 #include "includes.h"
  22 #include "defaults.h"
  23 #include "log.h"
  24
  25 #define CONTACT_EMAIL   "Pekka Savola <pekkas@netcore.fi>"
  26
  27 extern int sock;
  28
  29 #define min(a,b)        (((a) < (b)) ? (a) : (b))
  30
  31 struct AdvPrefix;
  32 struct Clients;
  33
  34 #define HWADDR_MAX 16
  35 #define USER_HZ 100
  36
  37 struct Interface {
  38         char                    Name[IFNAMSIZ]; /* interface name */
  39
  40         struct in6_addr         if_addr;
  41         unsigned int            if_index;
  42
  43         uint8_t                 init_racount;   /* Initial RAs */
  44
  45         uint8_t                 if_hwaddr[HWADDR_MAX];
  46         int                     if_hwaddr_len;
  47         int                     if_prefix_len;
  48         int                     if_maxmtu;
  49
  50         int                     cease_adv;
  51
  52         struct timeval          last_ra_time;
  53
  54         int                     IgnoreIfMissing;
  55         int                     AdvSendAdvert;
  56         double                  MaxRtrAdvInterval;
  57         double                  MinRtrAdvInterval;
  58         double                  MinDelayBetweenRAs;
  59         int                     AdvManagedFlag;
  60         int                     AdvOtherConfigFlag;
  61         uint32_t                AdvLinkMTU;
  62         uint32_t                AdvReachableTime;
  63         uint32_t                AdvRetransTimer;
  64         uint8_t                 AdvCurHopLimit;
  65         int32_t                 AdvDefaultLifetime;   /* XXX: really uint16_t but we need to use -1 */
  66         int                     AdvDefaultPreference;
  67         int                     AdvSourceLLAddress;
  68         int                     UnicastOnly;
  69
  70         /* Mobile IPv6 extensions */
  71         int                     AdvIntervalOpt;
  72         int                     AdvHomeAgentInfo;
  73         int                     AdvHomeAgentFlag;
  74         uint16_t                HomeAgentPreference;
  75         int32_t                 HomeAgentLifetime;    /* XXX: really uint16_t but we need to use -1 */
  76
  77         /* NEMO extensions */
  78         int                     AdvMobRtrSupportFlag;
  79
  80         struct AdvPrefix        *AdvPrefixList;
  81         struct AdvRoute         *AdvRouteList;
  82         struct AdvRDNSS         *AdvRDNSSList;
  83         struct AdvDNSSL         *AdvDNSSLList;
  84         struct Clients          *ClientList;
  85         struct timeval          last_multicast;
  86         struct timeval          next_multicast;
  87
  88         /* Info whether this interface has failed in the past (and may need to be reinitialized) */
  89         int                     HasFailed;
  90
  91         struct Interface        *next;
  92 };
  93
  94 struct Clients {
  95         struct in6_addr         Address;
  96         struct Clients          *next;
  97 };
  98
  99 struct AdvPrefix {
 100         struct in6_addr         Prefix;
 101         uint8_t                 PrefixLen;
 102
 103         int                     AdvOnLinkFlag;
 104         int                     AdvAutonomousFlag;
 105         uint32_t                AdvValidLifetime;
 106         uint32_t                AdvPreferredLifetime;
 107         int                     DeprecatePrefixFlag;
 108         int                     DecrementLifetimesFlag;
 109
 110         uint32_t                curr_validlft;
 111         uint32_t                curr_preferredlft;
 112
 113         /* Mobile IPv6 extensions */
 114         int                     AdvRouterAddr;
 115
 116         /* 6to4 etc. extensions */
 117         char                    if6to4[IFNAMSIZ];
 118         int                     enabled;
 119         int                     AutoSelected;
 120
 121         /* Select prefixes from this interface. */
 122         char                    if6[IFNAMSIZ];
 123
 124         struct AdvPrefix        *next;
 125 };
 126
 127 /* More-Specific Routes extensions */
 128
 129 struct AdvRoute {
 130         struct in6_addr         Prefix;
 131         uint8_t                 PrefixLen;
 132
 133         int                     AdvRoutePreference;
 134         uint32_t                AdvRouteLifetime;
 135         int                     RemoveRouteFlag;
 136
 137         struct AdvRoute         *next;
 138 };
 139
 140 /* Options for DNS configuration */
 141
 142 struct AdvRDNSS {
 143         int                     AdvRDNSSNumber;
 144         uint32_t                AdvRDNSSLifetime;
 145         int                     FlushRDNSSFlag;
 146         struct in6_addr         AdvRDNSSAddr1;
 147         struct in6_addr         AdvRDNSSAddr2;
 148         struct in6_addr         AdvRDNSSAddr3;
 149
 150         struct AdvRDNSS         *next;
 151 };
 152
 153 struct AdvDNSSL {
 154         uint32_t                AdvDNSSLLifetime;
 155
 156         int                     AdvDNSSLNumber;
 157         int                     FlushDNSSLFlag;
 158         char                    **AdvDNSSLSuffixes;
 159
 160         struct AdvDNSSL         *next;
 161 };
 162
 163 /* Mobile IPv6 extensions */
 164
 165 struct AdvInterval {
 166         uint8_t                 type;
 167         uint8_t                 length;
 168         uint16_t                reserved;
 169         uint32_t                adv_ival;
 170 };
 171
 172 struct HomeAgentInfo {
 173         uint8_t                 type;
 174         uint8_t                 length;
 175         uint16_t                flags_reserved;
 176         uint16_t                preference;
 177         uint16_t                lifetime;
 178 };
 179
 180
 181 /* gram.y */
 182 int yyparse(void);
 183
 184 /* scanner.l */
 185 int yylex(void);
 186
 187 /* radvd.c */
 188 int check_ip6_forwarding(void);
 189 void reload_config(void);
 190 void reset_prefix_lifetimes(void);
 191
 192 /* timer.c */
 193 struct timeval next_timeval(double next);
 194 int timevaldiff(struct timeval const *a, struct timeval const *b);
 195 int next_time_msec(struct Interface const * iface);
 196 int expired(struct Interface const * iface);
 197
 198 /* device.c */
 199 int setup_deviceinfo(struct Interface *);
 200 int check_device(struct Interface *);
 201 int setup_linklocal_addr(struct Interface *);
 202 int setup_allrouters_membership(struct Interface *);
 203 int check_allrouters_membership(struct Interface *);
 204 int get_v4addr(const char *, unsigned int *);
 205 int set_interface_var(const char *, const char *, const char *, uint32_t);
 206 int set_interface_linkmtu(const char *, uint32_t);
 207 int set_interface_curhlim(const char *, uint8_t);
 208 int set_interface_reachtime(const char *, uint32_t);
 209 int set_interface_retranstimer(const char *, uint32_t);
 210
 211 /* interface.c */
 212 void iface_init_defaults(struct Interface *);
 213 void prefix_init_defaults(struct AdvPrefix *);
 214 void route_init_defaults(struct AdvRoute *, struct Interface *);
 215 void rdnss_init_defaults(struct AdvRDNSS *, struct Interface *);
 216 void dnssl_init_defaults(struct AdvDNSSL *, struct Interface *);
 217 int check_iface(struct Interface *);
 218
 219 /* socket.c */
 220 int open_icmpv6_socket(void);
 221
 222 /* send.c */
 223 int send_ra(struct Interface *iface, struct in6_addr *dest);
 224 int send_ra_forall(struct Interface *iface, struct in6_addr *dest);
 225
 226 /* process.c */
 227 void process(struct Interface *, unsigned char *, int,
 228         struct sockaddr_in6 *, struct in6_pktinfo *, int);
 229
 230 /* recv.c */
 231 int recv_rs_ra(unsigned char *, struct sockaddr_in6 *, struct in6_pktinfo **, int *);
 232
 233 /* util.c */
 234 void mdelay(double);
 235 double rand_between(double, double);
 236 void print_addr(struct in6_addr *, char *);
 237 int check_rdnss_presence(struct AdvRDNSS *, struct in6_addr *);
 238 int check_dnssl_presence(struct AdvDNSSL *, const char *);
 239 ssize_t readn(int fd, void *buf, size_t count);
 240 ssize_t writen(int fd, const void *buf, size_t count);
 241
 242 /* privsep.c */
 243 int privsep_init(void);
 244 int privsep_enabled(void);
 245 int privsep_interface_linkmtu(const char *iface, uint32_t mtu);
 246 int privsep_interface_curhlim(const char *iface, uint32_t hlim);
 247 int privsep_interface_reachtime(const char *iface, uint32_t rtime);
 248 int privsep_interface_retranstimer(const char *iface, uint32_t rettimer);
 249
 250 /*
 251  * compat hacks in case libc and kernel get out of sync:
 252  *
 253  * glibc 2.4 and uClibc 0.9.29 introduce IPV6_RECVPKTINFO etc. and change IPV6_PKTINFO
 254  * This is only supported in Linux kernel >= 2.6.14
 255  *
 256  * This is only an approximation because the kernel version that libc was compiled against
 257  * could be older or newer than the one being run.  But this should not be a problem --
 258  * we just keep using the old kernel interface.
 259  *
 260  * these are placed here because they're needed in all of socket.c, recv.c and send.c
 261  */
 262 #ifdef __linux__
 263 #  if defined IPV6_RECVHOPLIMIT || defined IPV6_RECVPKTINFO
 264 #    include <linux/version.h>
 265 #    if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,14)
 266 #      if defined IPV6_RECVHOPLIMIT && defined IPV6_2292HOPLIMIT
 267 #        undef IPV6_RECVHOPLIMIT
 268 #        define IPV6_RECVHOPLIMIT IPV6_2292HOPLIMIT
 269 #      endif
 270 #      if defined IPV6_RECVPKTINFO && defined IPV6_2292PKTINFO
 271 #        undef IPV6_RECVPKTINFO
 272 #        undef IPV6_PKTINFO
 273 #        define IPV6_RECVPKTINFO IPV6_2292PKTINFO
 274 #        define IPV6_PKTINFO IPV6_2292PKTINFO
 275 #      endif
 276 #    endif
 277 #  endif
 278 #endif
 279
 280 #endif