Version:  2.0.40 2.2.26 2.4.37 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9

Linux/include/net/addrconf.h

  1 #ifndef _ADDRCONF_H
  2 #define _ADDRCONF_H
  3 
  4 #define MAX_RTR_SOLICITATIONS           -1              /* unlimited */
  5 #define RTR_SOLICITATION_INTERVAL       (4*HZ)
  6 #define RTR_SOLICITATION_MAX_INTERVAL   (3600*HZ)       /* 1 hour */
  7 
  8 #define MIN_VALID_LIFETIME              (2*3600)        /* 2 hours */
  9 
 10 #define TEMP_VALID_LIFETIME             (7*86400)
 11 #define TEMP_PREFERRED_LIFETIME         (86400)
 12 #define REGEN_MAX_RETRY                 (3)
 13 #define MAX_DESYNC_FACTOR               (600)
 14 
 15 #define ADDR_CHECK_FREQUENCY            (120*HZ)
 16 
 17 #define IPV6_MAX_ADDRESSES              16
 18 
 19 #define ADDRCONF_TIMER_FUZZ_MINUS       (HZ > 50 ? HZ / 50 : 1)
 20 #define ADDRCONF_TIMER_FUZZ             (HZ / 4)
 21 #define ADDRCONF_TIMER_FUZZ_MAX         (HZ)
 22 
 23 #include <linux/in.h>
 24 #include <linux/in6.h>
 25 
 26 struct prefix_info {
 27         __u8                    type;
 28         __u8                    length;
 29         __u8                    prefix_len;
 30 
 31 #if defined(__BIG_ENDIAN_BITFIELD)
 32         __u8                    onlink : 1,
 33                                 autoconf : 1,
 34                                 reserved : 6;
 35 #elif defined(__LITTLE_ENDIAN_BITFIELD)
 36         __u8                    reserved : 6,
 37                                 autoconf : 1,
 38                                 onlink : 1;
 39 #else
 40 #error "Please fix <asm/byteorder.h>"
 41 #endif
 42         __be32                  valid;
 43         __be32                  prefered;
 44         __be32                  reserved2;
 45 
 46         struct in6_addr         prefix;
 47 };
 48 
 49 
 50 #include <linux/netdevice.h>
 51 #include <net/if_inet6.h>
 52 #include <net/ipv6.h>
 53 
 54 #define IN6_ADDR_HSIZE_SHIFT    4
 55 #define IN6_ADDR_HSIZE          (1 << IN6_ADDR_HSIZE_SHIFT)
 56 
 57 int addrconf_init(void);
 58 void addrconf_cleanup(void);
 59 
 60 int addrconf_add_ifaddr(struct net *net, void __user *arg);
 61 int addrconf_del_ifaddr(struct net *net, void __user *arg);
 62 int addrconf_set_dstaddr(struct net *net, void __user *arg);
 63 
 64 int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
 65                   const struct net_device *dev, int strict);
 66 int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
 67                             const struct net_device *dev, int strict,
 68                             u32 banned_flags);
 69 
 70 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 71 int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);
 72 #endif
 73 
 74 bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
 75                                    const unsigned int prefix_len,
 76                                    struct net_device *dev);
 77 
 78 int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
 79 
 80 struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
 81                                      const struct in6_addr *addr,
 82                                      struct net_device *dev, int strict);
 83 
 84 int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev,
 85                        const struct in6_addr *daddr, unsigned int srcprefs,
 86                        struct in6_addr *saddr);
 87 int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
 88                       u32 banned_flags);
 89 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
 90                     u32 banned_flags);
 91 int ipv4_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
 92                          bool match_wildcard);
 93 int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2,
 94                          bool match_wildcard);
 95 void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
 96 void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
 97 
 98 void addrconf_add_linklocal(struct inet6_dev *idev,
 99                             const struct in6_addr *addr, u32 flags);
100 
101 int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
102                                  const struct prefix_info *pinfo,
103                                  struct inet6_dev *in6_dev,
104                                  const struct in6_addr *addr, int addr_type,
105                                  u32 addr_flags, bool sllao, bool tokenized,
106                                  __u32 valid_lft, u32 prefered_lft);
107 
108 static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
109 {
110         if (dev->addr_len != ETH_ALEN)
111                 return -1;
112         memcpy(eui, dev->dev_addr, 3);
113         memcpy(eui + 5, dev->dev_addr + 3, 3);
114 
115         /*
116          * The zSeries OSA network cards can be shared among various
117          * OS instances, but the OSA cards have only one MAC address.
118          * This leads to duplicate address conflicts in conjunction
119          * with IPv6 if more than one instance uses the same card.
120          *
121          * The driver for these cards can deliver a unique 16-bit
122          * identifier for each instance sharing the same card.  It is
123          * placed instead of 0xFFFE in the interface identifier.  The
124          * "u" bit of the interface identifier is not inverted in this
125          * case.  Hence the resulting interface identifier has local
126          * scope according to RFC2373.
127          */
128         if (dev->dev_id) {
129                 eui[3] = (dev->dev_id >> 8) & 0xFF;
130                 eui[4] = dev->dev_id & 0xFF;
131         } else {
132                 eui[3] = 0xFF;
133                 eui[4] = 0xFE;
134                 eui[0] ^= 2;
135         }
136         return 0;
137 }
138 
139 static inline unsigned long addrconf_timeout_fixup(u32 timeout,
140                                                    unsigned int unit)
141 {
142         if (timeout == 0xffffffff)
143                 return ~0UL;
144 
145         /*
146          * Avoid arithmetic overflow.
147          * Assuming unit is constant and non-zero, this "if" statement
148          * will go away on 64bit archs.
149          */
150         if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
151                 return LONG_MAX / unit;
152 
153         return timeout;
154 }
155 
156 static inline int addrconf_finite_timeout(unsigned long timeout)
157 {
158         return ~timeout;
159 }
160 
161 /*
162  *      IPv6 Address Label subsystem (addrlabel.c)
163  */
164 int ipv6_addr_label_init(void);
165 void ipv6_addr_label_cleanup(void);
166 void ipv6_addr_label_rtnl_register(void);
167 u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
168                     int type, int ifindex);
169 
170 /*
171  *      multicast prototypes (mcast.c)
172  */
173 int ipv6_sock_mc_join(struct sock *sk, int ifindex,
174                       const struct in6_addr *addr);
175 int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
176                       const struct in6_addr *addr);
177 void __ipv6_sock_mc_close(struct sock *sk);
178 void ipv6_sock_mc_close(struct sock *sk);
179 bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
180                     const struct in6_addr *src_addr);
181 
182 int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
183 int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
184 int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
185 void ipv6_mc_up(struct inet6_dev *idev);
186 void ipv6_mc_down(struct inet6_dev *idev);
187 void ipv6_mc_unmap(struct inet6_dev *idev);
188 void ipv6_mc_remap(struct inet6_dev *idev);
189 void ipv6_mc_init_dev(struct inet6_dev *idev);
190 void ipv6_mc_destroy_dev(struct inet6_dev *idev);
191 int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed);
192 void addrconf_dad_failure(struct inet6_ifaddr *ifp);
193 
194 bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
195                          const struct in6_addr *src_addr);
196 
197 void ipv6_mc_dad_complete(struct inet6_dev *idev);
198 
199 /* A stub used by vxlan module. This is ugly, ideally these
200  * symbols should be built into the core kernel.
201  */
202 struct ipv6_stub {
203         int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
204                                  const struct in6_addr *addr);
205         int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
206                                  const struct in6_addr *addr);
207         int (*ipv6_dst_lookup)(struct net *net, struct sock *sk,
208                                struct dst_entry **dst, struct flowi6 *fl6);
209         void (*udpv6_encap_enable)(void);
210         void (*ndisc_send_na)(struct net_device *dev, const struct in6_addr *daddr,
211                               const struct in6_addr *solicited_addr,
212                               bool router, bool solicited, bool override, bool inc_opt);
213         struct neigh_table *nd_tbl;
214 };
215 extern const struct ipv6_stub *ipv6_stub __read_mostly;
216 
217 /*
218  * identify MLD packets for MLD filter exceptions
219  */
220 static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
221 {
222         struct icmp6hdr *hdr;
223 
224         if (nexthdr != IPPROTO_ICMPV6 ||
225             !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
226                 return false;
227 
228         hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
229 
230         switch (hdr->icmp6_type) {
231         case ICMPV6_MGM_QUERY:
232         case ICMPV6_MGM_REPORT:
233         case ICMPV6_MGM_REDUCTION:
234         case ICMPV6_MLD2_REPORT:
235                 return true;
236         default:
237                 break;
238         }
239         return false;
240 }
241 
242 void addrconf_prefix_rcv(struct net_device *dev,
243                          u8 *opt, int len, bool sllao);
244 
245 /*
246  *      anycast prototypes (anycast.c)
247  */
248 int ipv6_sock_ac_join(struct sock *sk, int ifindex,
249                       const struct in6_addr *addr);
250 int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
251                       const struct in6_addr *addr);
252 void ipv6_sock_ac_close(struct sock *sk);
253 
254 int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);
255 int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
256 void ipv6_ac_destroy_dev(struct inet6_dev *idev);
257 bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
258                          const struct in6_addr *addr);
259 bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
260                              const struct in6_addr *addr);
261 
262 /* Device notifier */
263 int register_inet6addr_notifier(struct notifier_block *nb);
264 int unregister_inet6addr_notifier(struct notifier_block *nb);
265 int inet6addr_notifier_call_chain(unsigned long val, void *v);
266 
267 void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
268                                   struct ipv6_devconf *devconf);
269 
270 /**
271  * __in6_dev_get - get inet6_dev pointer from netdevice
272  * @dev: network device
273  *
274  * Caller must hold rcu_read_lock or RTNL, because this function
275  * does not take a reference on the inet6_dev.
276  */
277 static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
278 {
279         return rcu_dereference_rtnl(dev->ip6_ptr);
280 }
281 
282 /**
283  * in6_dev_get - get inet6_dev pointer from netdevice
284  * @dev: network device
285  *
286  * This version can be used in any context, and takes a reference
287  * on the inet6_dev. Callers must use in6_dev_put() later to
288  * release this reference.
289  */
290 static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
291 {
292         struct inet6_dev *idev;
293 
294         rcu_read_lock();
295         idev = rcu_dereference(dev->ip6_ptr);
296         if (idev)
297                 atomic_inc(&idev->refcnt);
298         rcu_read_unlock();
299         return idev;
300 }
301 
302 static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
303 {
304         struct inet6_dev *idev = __in6_dev_get(dev);
305 
306         return idev ? idev->nd_parms : NULL;
307 }
308 
309 void in6_dev_finish_destroy(struct inet6_dev *idev);
310 
311 static inline void in6_dev_put(struct inet6_dev *idev)
312 {
313         if (atomic_dec_and_test(&idev->refcnt))
314                 in6_dev_finish_destroy(idev);
315 }
316 
317 static inline void __in6_dev_put(struct inet6_dev *idev)
318 {
319         atomic_dec(&idev->refcnt);
320 }
321 
322 static inline void in6_dev_hold(struct inet6_dev *idev)
323 {
324         atomic_inc(&idev->refcnt);
325 }
326 
327 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
328 
329 static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
330 {
331         if (atomic_dec_and_test(&ifp->refcnt))
332                 inet6_ifa_finish_destroy(ifp);
333 }
334 
335 static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
336 {
337         atomic_dec(&ifp->refcnt);
338 }
339 
340 static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
341 {
342         atomic_inc(&ifp->refcnt);
343 }
344 
345 
346 /*
347  *      compute link-local solicited-node multicast address
348  */
349 
350 static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
351                                              struct in6_addr *solicited)
352 {
353         ipv6_addr_set(solicited,
354                       htonl(0xFF020000), 0,
355                       htonl(0x1),
356                       htonl(0xFF000000) | addr->s6_addr32[3]);
357 }
358 
359 static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
360 {
361 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
362         __be64 *p = (__be64 *)addr;
363         return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
364 #else
365         return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
366                 addr->s6_addr32[1] | addr->s6_addr32[2] |
367                 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
368 #endif
369 }
370 
371 static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
372 {
373 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
374         __be64 *p = (__be64 *)addr;
375         return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
376 #else
377         return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
378                 addr->s6_addr32[1] | addr->s6_addr32[2] |
379                 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
380 #endif
381 }
382 
383 static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
384 {
385         return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
386 }
387 
388 static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
389 {
390 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
391         __be64 *p = (__be64 *)addr;
392         return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
393                 ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
394                  cpu_to_be64(0xffffffffff000000UL))) == 0UL;
395 #else
396         return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
397                 addr->s6_addr32[1] |
398                 (addr->s6_addr32[2] ^ htonl(0x00000001)) |
399                 (addr->s6_addr[12] ^ 0xff)) == 0;
400 #endif
401 }
402 
403 #ifdef CONFIG_PROC_FS
404 int if6_proc_init(void);
405 void if6_proc_exit(void);
406 #endif
407 
408 #endif
409 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us