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 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */ 93 struct ipv6_mc_socklist __rcu *next; 94 rwlock_t sflock; 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