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Linux/include/net/if_inet6.h

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  1 /* SPDX-License-Identifier: GPL-2.0-or-later */
  2 /*
  3  *      inet6 interface/address list definitions
  4  *      Linux INET6 implementation 
  5  *
  6  *      Authors:
  7  *      Pedro Roque             <roque@di.fc.ul.pt>     
  8  */
  9 
 10 #ifndef _NET_IF_INET6_H
 11 #define _NET_IF_INET6_H
 12 
 13 #include <net/snmp.h>
 14 #include <linux/ipv6.h>
 15 #include <linux/refcount.h>
 16 
 17 /* inet6_dev.if_flags */
 18 
 19 #define IF_RA_OTHERCONF 0x80
 20 #define IF_RA_MANAGED   0x40
 21 #define IF_RA_RCVD      0x20
 22 #define IF_RS_SENT      0x10
 23 #define IF_READY        0x80000000
 24 
 25 /* prefix flags */
 26 #define IF_PREFIX_ONLINK        0x01
 27 #define IF_PREFIX_AUTOCONF      0x02
 28 
 29 enum {
 30         INET6_IFADDR_STATE_PREDAD,
 31         INET6_IFADDR_STATE_DAD,
 32         INET6_IFADDR_STATE_POSTDAD,
 33         INET6_IFADDR_STATE_ERRDAD,
 34         INET6_IFADDR_STATE_DEAD,
 35 };
 36 
 37 struct inet6_ifaddr {
 38         struct in6_addr         addr;
 39         __u32                   prefix_len;
 40         __u32                   rt_priority;
 41 
 42         /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
 43         __u32                   valid_lft;
 44         __u32                   prefered_lft;
 45         refcount_t              refcnt;
 46         spinlock_t              lock;
 47 
 48         int                     state;
 49 
 50         __u32                   flags;
 51         __u8                    dad_probes;
 52         __u8                    stable_privacy_retry;
 53 
 54         __u16                   scope;
 55         __u64                   dad_nonce;
 56 
 57         unsigned long           cstamp; /* created timestamp */
 58         unsigned long           tstamp; /* updated timestamp */
 59 
 60         struct delayed_work     dad_work;
 61 
 62         struct inet6_dev        *idev;
 63         struct fib6_info        *rt;
 64 
 65         struct hlist_node       addr_lst;
 66         struct list_head        if_list;
 67 
 68         struct list_head        tmp_list;
 69         struct inet6_ifaddr     *ifpub;
 70         int                     regen_count;
 71 
 72         bool                    tokenized;
 73 
 74         struct rcu_head         rcu;
 75         struct in6_addr         peer_addr;
 76 };
 77 
 78 struct ip6_sf_socklist {
 79         unsigned int            sl_max;
 80         unsigned int            sl_count;
 81         struct in6_addr         sl_addr[0];
 82 };
 83 
 84 #define IP6_SFLSIZE(count)      (sizeof(struct ip6_sf_socklist) + \
 85         (count) * sizeof(struct in6_addr))
 86 
 87 #define IP6_SFBLOCK     10      /* allocate this many at once */
 88 
 89 struct ipv6_mc_socklist {
 90         struct in6_addr         addr;
 91         int                     ifindex;
 92         struct ipv6_mc_socklist __rcu *next;
 93         rwlock_t                sflock;
 94         unsigned int            sfmode;         /* MCAST_{INCLUDE,EXCLUDE} */
 95         struct ip6_sf_socklist  *sflist;
 96         struct rcu_head         rcu;
 97 };
 98 
 99 struct ip6_sf_list {
100         struct ip6_sf_list      *sf_next;
101         struct in6_addr         sf_addr;
102         unsigned long           sf_count[2];    /* include/exclude counts */
103         unsigned char           sf_gsresp;      /* include in g & s response? */
104         unsigned char           sf_oldin;       /* change state */
105         unsigned char           sf_crcount;     /* retrans. left to send */
106 };
107 
108 #define MAF_TIMER_RUNNING       0x01
109 #define MAF_LAST_REPORTER       0x02
110 #define MAF_LOADED              0x04
111 #define MAF_NOREPORT            0x08
112 #define MAF_GSQUERY             0x10
113 
114 struct ifmcaddr6 {
115         struct in6_addr         mca_addr;
116         struct inet6_dev        *idev;
117         struct ifmcaddr6        *next;
118         struct ip6_sf_list      *mca_sources;
119         struct ip6_sf_list      *mca_tomb;
120         unsigned int            mca_sfmode;
121         unsigned char           mca_crcount;
122         unsigned long           mca_sfcount[2];
123         struct timer_list       mca_timer;
124         unsigned int            mca_flags;
125         int                     mca_users;
126         refcount_t              mca_refcnt;
127         spinlock_t              mca_lock;
128         unsigned long           mca_cstamp;
129         unsigned long           mca_tstamp;
130 };
131 
132 /* Anycast stuff */
133 
134 struct ipv6_ac_socklist {
135         struct in6_addr         acl_addr;
136         int                     acl_ifindex;
137         struct ipv6_ac_socklist *acl_next;
138 };
139 
140 struct ifacaddr6 {
141         struct in6_addr         aca_addr;
142         struct fib6_info        *aca_rt;
143         struct ifacaddr6        *aca_next;
144         struct hlist_node       aca_addr_lst;
145         int                     aca_users;
146         refcount_t              aca_refcnt;
147         unsigned long           aca_cstamp;
148         unsigned long           aca_tstamp;
149         struct rcu_head         rcu;
150 };
151 
152 #define IFA_HOST        IPV6_ADDR_LOOPBACK
153 #define IFA_LINK        IPV6_ADDR_LINKLOCAL
154 #define IFA_SITE        IPV6_ADDR_SITELOCAL
155 
156 struct ipv6_devstat {
157         struct proc_dir_entry   *proc_dir_entry;
158         DEFINE_SNMP_STAT(struct ipstats_mib, ipv6);
159         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev);
160         DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev);
161 };
162 
163 struct inet6_dev {
164         struct net_device       *dev;
165 
166         struct list_head        addr_list;
167 
168         struct ifmcaddr6        *mc_list;
169         struct ifmcaddr6        *mc_tomb;
170         spinlock_t              mc_lock;
171 
172         unsigned char           mc_qrv;         /* Query Robustness Variable */
173         unsigned char           mc_gq_running;
174         unsigned char           mc_ifc_count;
175         unsigned char           mc_dad_count;
176 
177         unsigned long           mc_v1_seen;     /* Max time we stay in MLDv1 mode */
178         unsigned long           mc_qi;          /* Query Interval */
179         unsigned long           mc_qri;         /* Query Response Interval */
180         unsigned long           mc_maxdelay;
181 
182         struct timer_list       mc_gq_timer;    /* general query timer */
183         struct timer_list       mc_ifc_timer;   /* interface change timer */
184         struct timer_list       mc_dad_timer;   /* dad complete mc timer */
185 
186         struct ifacaddr6        *ac_list;
187         rwlock_t                lock;
188         refcount_t              refcnt;
189         __u32                   if_flags;
190         int                     dead;
191 
192         u32                     desync_factor;
193         u8                      rndid[8];
194         struct list_head        tempaddr_list;
195 
196         struct in6_addr         token;
197 
198         struct neigh_parms      *nd_parms;
199         struct ipv6_devconf     cnf;
200         struct ipv6_devstat     stats;
201 
202         struct timer_list       rs_timer;
203         __s32                   rs_interval;    /* in jiffies */
204         __u8                    rs_probes;
205 
206         unsigned long           tstamp; /* ipv6InterfaceTable update timestamp */
207         struct rcu_head         rcu;
208 };
209 
210 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf)
211 {
212         /*
213          *      +-------+-------+-------+-------+-------+-------+
214          *      |   33  |   33  | DST13 | DST14 | DST15 | DST16 |
215          *      +-------+-------+-------+-------+-------+-------+
216          */
217 
218         buf[0]= 0x33;
219         buf[1]= 0x33;
220 
221         memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
222 }
223 
224 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
225 {
226         buf[0] = 0x00;
227 }
228 
229 static inline void ipv6_ib_mc_map(const struct in6_addr *addr,
230                                   const unsigned char *broadcast, char *buf)
231 {
232         unsigned char scope = broadcast[5] & 0xF;
233 
234         buf[0]  = 0;            /* Reserved */
235         buf[1]  = 0xff;         /* Multicast QPN */
236         buf[2]  = 0xff;
237         buf[3]  = 0xff;
238         buf[4]  = 0xff;
239         buf[5]  = 0x10 | scope; /* scope from broadcast address */
240         buf[6]  = 0x60;         /* IPv6 signature */
241         buf[7]  = 0x1b;
242         buf[8]  = broadcast[8]; /* P_Key */
243         buf[9]  = broadcast[9];
244         memcpy(buf + 10, addr->s6_addr + 6, 10);
245 }
246 
247 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr,
248                                     const unsigned char *broadcast, char *buf)
249 {
250         if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) {
251                 memcpy(buf, broadcast, 4);
252         } else {
253                 /* v4mapped? */
254                 if ((addr->s6_addr32[0] | addr->s6_addr32[1] |
255                      (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0)
256                         return -EINVAL;
257                 memcpy(buf, &addr->s6_addr32[3], 4);
258         }
259         return 0;
260 }
261 
262 #endif
263 

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