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 * Used to safely traverse idev->addr_list in process context 69 * if the idev->lock needed to protect idev->addr_list cannot be held. 70 * In that case, add the items to this list temporarily and iterate 71 * without holding idev->lock. 72 * See addrconf_ifdown and dev_forward_change. 73 */ 74 struct list_head if_list_aux; 75 76 struct list_head tmp_list; 77 struct inet6_ifaddr *ifpub; 78 int regen_count; 79 80 bool tokenized; 81 82 u8 ifa_proto; 83 84 struct rcu_head rcu; 85 struct in6_addr peer_addr; 86 }; 87 88 struct ip6_sf_socklist { 89 unsigned int sl_max; 90 unsigned int sl_count; 91 struct rcu_head rcu; 92 struct in6_addr sl_addr[]; 93 }; 94 95 #define IP6_SFBLOCK 10 /* allocate this many at once */ 96 97 struct ipv6_mc_socklist { 98 struct in6_addr addr; 99 int ifindex; 100 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */ 101 struct ipv6_mc_socklist __rcu *next; 102 struct ip6_sf_socklist __rcu *sflist; 103 struct rcu_head rcu; 104 }; 105 106 struct ip6_sf_list { 107 struct ip6_sf_list __rcu *sf_next; 108 struct in6_addr sf_addr; 109 unsigned long sf_count[2]; /* include/exclude counts */ 110 unsigned char sf_gsresp; /* include in g & s response? */ 111 unsigned char sf_oldin; /* change state */ 112 unsigned char sf_crcount; /* retrans. left to send */ 113 struct rcu_head rcu; 114 }; 115 116 #define MAF_TIMER_RUNNING 0x01 117 #define MAF_LAST_REPORTER 0x02 118 #define MAF_LOADED 0x04 119 #define MAF_NOREPORT 0x08 120 #define MAF_GSQUERY 0x10 121 122 struct ifmcaddr6 { 123 struct in6_addr mca_addr; 124 struct inet6_dev *idev; 125 struct ifmcaddr6 __rcu *next; 126 struct ip6_sf_list __rcu *mca_sources; 127 struct ip6_sf_list __rcu *mca_tomb; 128 unsigned int mca_sfmode; 129 unsigned char mca_crcount; 130 unsigned long mca_sfcount[2]; 131 struct delayed_work mca_work; 132 unsigned int mca_flags; 133 int mca_users; 134 refcount_t mca_refcnt; 135 unsigned long mca_cstamp; 136 unsigned long mca_tstamp; 137 struct rcu_head rcu; 138 }; 139 140 /* Anycast stuff */ 141 142 struct ipv6_ac_socklist { 143 struct in6_addr acl_addr; 144 int acl_ifindex; 145 struct ipv6_ac_socklist *acl_next; 146 }; 147 148 struct ifacaddr6 { 149 struct in6_addr aca_addr; 150 struct fib6_info *aca_rt; 151 struct ifacaddr6 *aca_next; 152 struct hlist_node aca_addr_lst; 153 int aca_users; 154 refcount_t aca_refcnt; 155 unsigned long aca_cstamp; 156 unsigned long aca_tstamp; 157 struct rcu_head rcu; 158 }; 159 160 #define IFA_HOST IPV6_ADDR_LOOPBACK 161 #define IFA_LINK IPV6_ADDR_LINKLOCAL 162 #define IFA_SITE IPV6_ADDR_SITELOCAL 163 164 struct ipv6_devstat { 165 struct proc_dir_entry *proc_dir_entry; 166 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6); 167 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev); 168 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev); 169 }; 170 171 struct inet6_dev { 172 struct net_device *dev; 173 netdevice_tracker dev_tracker; 174 175 struct list_head addr_list; 176 177 struct ifmcaddr6 __rcu *mc_list; 178 struct ifmcaddr6 __rcu *mc_tomb; 179 180 unsigned char mc_qrv; /* Query Robustness Variable */ 181 unsigned char mc_gq_running; 182 unsigned char mc_ifc_count; 183 unsigned char mc_dad_count; 184 185 unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */ 186 unsigned long mc_qi; /* Query Interval */ 187 unsigned long mc_qri; /* Query Response Interval */ 188 unsigned long mc_maxdelay; 189 190 struct delayed_work mc_gq_work; /* general query work */ 191 struct delayed_work mc_ifc_work; /* interface change work */ 192 struct delayed_work mc_dad_work; /* dad complete mc work */ 193 struct delayed_work mc_query_work; /* mld query work */ 194 struct delayed_work mc_report_work; /* mld report work */ 195 196 struct sk_buff_head mc_query_queue; /* mld query queue */ 197 struct sk_buff_head mc_report_queue; /* mld report queue */ 198 199 spinlock_t mc_query_lock; /* mld query queue lock */ 200 spinlock_t mc_report_lock; /* mld query report lock */ 201 struct mutex mc_lock; /* mld global lock */ 202 203 struct ifacaddr6 *ac_list; 204 rwlock_t lock; 205 refcount_t refcnt; 206 __u32 if_flags; 207 int dead; 208 209 u32 desync_factor; 210 struct list_head tempaddr_list; 211 212 struct in6_addr token; 213 214 struct neigh_parms *nd_parms; 215 struct ipv6_devconf cnf; 216 struct ipv6_devstat stats; 217 218 struct timer_list rs_timer; 219 __s32 rs_interval; /* in jiffies */ 220 __u8 rs_probes; 221 222 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */ 223 struct rcu_head rcu; 224 225 unsigned int ra_mtu; 226 }; 227 228 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf) 229 { 230 /* 231 * +-------+-------+-------+-------+-------+-------+ 232 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 | 233 * +-------+-------+-------+-------+-------+-------+ 234 */ 235 236 buf[0]= 0x33; 237 buf[1]= 0x33; 238 239 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32)); 240 } 241 242 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf) 243 { 244 buf[0] = 0x00; 245 } 246 247 static inline void ipv6_ib_mc_map(const struct in6_addr *addr, 248 const unsigned char *broadcast, char *buf) 249 { 250 unsigned char scope = broadcast[5] & 0xF; 251 252 buf[0] = 0; /* Reserved */ 253 buf[1] = 0xff; /* Multicast QPN */ 254 buf[2] = 0xff; 255 buf[3] = 0xff; 256 buf[4] = 0xff; 257 buf[5] = 0x10 | scope; /* scope from broadcast address */ 258 buf[6] = 0x60; /* IPv6 signature */ 259 buf[7] = 0x1b; 260 buf[8] = broadcast[8]; /* P_Key */ 261 buf[9] = broadcast[9]; 262 memcpy(buf + 10, addr->s6_addr + 6, 10); 263 } 264 265 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr, 266 const unsigned char *broadcast, char *buf) 267 { 268 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) { 269 memcpy(buf, broadcast, 4); 270 } else { 271 /* v4mapped? */ 272 if ((addr->s6_addr32[0] | addr->s6_addr32[1] | 273 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0) 274 return -EINVAL; 275 memcpy(buf, &addr->s6_addr32[3], 4); 276 } 277 return 0; 278 } 279 280 #endif 281