Version:  2.0.40 2.2.26 2.4.37 3.8 3.9 3.10 3.11 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

Linux/include/net/addrconf.h

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

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