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 enum { 26 INET6_IFADDR_STATE_PREDAD, 27 INET6_IFADDR_STATE_DAD, 28 INET6_IFADDR_STATE_POSTDAD, 29 INET6_IFADDR_STATE_ERRDAD, 30 INET6_IFADDR_STATE_DEAD, 31 }; 32 33 struct inet6_ifaddr { 34 struct in6_addr addr; 35 __u32 prefix_len; 36 __u32 rt_priority; 37 38 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */ 39 __u32 valid_lft; 40 __u32 prefered_lft; 41 refcount_t refcnt; 42 spinlock_t lock; 43 44 int state; 45 46 __u32 flags; 47 __u8 dad_probes; 48 __u8 stable_privacy_retry; 49 50 __u16 scope; 51 __u64 dad_nonce; 52 53 unsigned long cstamp; /* created timestamp */ 54 unsigned long tstamp; /* updated timestamp */ 55 56 struct delayed_work dad_work; 57 58 struct inet6_dev *idev; 59 struct fib6_info *rt; 60 61 struct hlist_node addr_lst; 62 struct list_head if_list; 63 /* 64 * Used to safely traverse idev->addr_list in process context 65 * if the idev->lock needed to protect idev->addr_list cannot be held. 66 * In that case, add the items to this list temporarily and iterate 67 * without holding idev->lock. 68 * See addrconf_ifdown and dev_forward_change. 69 */ 70 struct list_head if_list_aux; 71 72 struct list_head tmp_list; 73 struct inet6_ifaddr *ifpub; 74 int regen_count; 75 76 bool tokenized; 77 78 u8 ifa_proto; 79 80 struct rcu_head rcu; 81 struct in6_addr peer_addr; 82 }; 83 84 struct ip6_sf_socklist { 85 unsigned int sl_max; 86 unsigned int sl_count; 87 struct rcu_head rcu; 88 struct in6_addr sl_addr[] __counted_by(sl_max); 89 }; 90 91 struct ipv6_mc_socklist { 92 struct in6_addr addr; 93 int ifindex; 94 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */ 95 struct ipv6_mc_socklist __rcu *next; 96 struct ip6_sf_socklist __rcu *sflist; 97 struct rcu_head rcu; 98 }; 99 100 struct ip6_sf_list { 101 struct ip6_sf_list __rcu *sf_next; 102 struct in6_addr sf_addr; 103 unsigned long sf_count[2]; /* include/exclude counts */ 104 unsigned char sf_gsresp; /* include in g & s response? */ 105 unsigned char sf_oldin; /* change state */ 106 unsigned char sf_crcount; /* retrans. left to send */ 107 struct rcu_head rcu; 108 }; 109 110 #define MAF_TIMER_RUNNING 0x01 111 #define MAF_LAST_REPORTER 0x02 112 #define MAF_LOADED 0x04 113 #define MAF_NOREPORT 0x08 114 #define MAF_GSQUERY 0x10 115 116 struct ifmcaddr6 { 117 struct in6_addr mca_addr; 118 struct inet6_dev *idev; 119 struct ifmcaddr6 __rcu *next; 120 struct ip6_sf_list __rcu *mca_sources; 121 struct ip6_sf_list __rcu *mca_tomb; 122 unsigned int mca_sfmode; 123 unsigned char mca_crcount; 124 unsigned long mca_sfcount[2]; 125 struct delayed_work mca_work; 126 unsigned int mca_flags; 127 int mca_users; 128 refcount_t mca_refcnt; 129 unsigned long mca_cstamp; 130 unsigned long mca_tstamp; 131 struct rcu_head rcu; 132 }; 133 134 /* Anycast stuff */ 135 136 struct ipv6_ac_socklist { 137 struct in6_addr acl_addr; 138 int acl_ifindex; 139 struct ipv6_ac_socklist *acl_next; 140 }; 141 142 struct ifacaddr6 { 143 struct in6_addr aca_addr; 144 struct fib6_info *aca_rt; 145 struct ifacaddr6 __rcu *aca_next; 146 struct hlist_node aca_addr_lst; 147 int aca_users; 148 refcount_t aca_refcnt; 149 unsigned long aca_cstamp; 150 unsigned long aca_tstamp; 151 struct rcu_head rcu; 152 }; 153 154 #define IFA_HOST IPV6_ADDR_LOOPBACK 155 #define IFA_LINK IPV6_ADDR_LINKLOCAL 156 #define IFA_SITE IPV6_ADDR_SITELOCAL 157 158 struct ipv6_devstat { 159 struct proc_dir_entry *proc_dir_entry; 160 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6); 161 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev); 162 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev); 163 }; 164 165 struct inet6_dev { 166 struct net_device *dev; 167 netdevice_tracker dev_tracker; 168 169 struct list_head addr_list; 170 171 struct ifmcaddr6 __rcu *mc_list; 172 struct ifmcaddr6 __rcu *mc_tomb; 173 174 unsigned char mc_qrv; /* Query Robustness Variable */ 175 unsigned char mc_gq_running; 176 unsigned char mc_ifc_count; 177 unsigned char mc_dad_count; 178 179 unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */ 180 unsigned long mc_qi; /* Query Interval */ 181 unsigned long mc_qri; /* Query Response Interval */ 182 unsigned long mc_maxdelay; 183 184 struct delayed_work mc_gq_work; /* general query work */ 185 struct delayed_work mc_ifc_work; /* interface change work */ 186 struct delayed_work mc_dad_work; /* dad complete mc work */ 187 struct delayed_work mc_query_work; /* mld query work */ 188 struct delayed_work mc_report_work; /* mld report work */ 189 190 struct sk_buff_head mc_query_queue; /* mld query queue */ 191 struct sk_buff_head mc_report_queue; /* mld report queue */ 192 193 spinlock_t mc_query_lock; /* mld query queue lock */ 194 spinlock_t mc_report_lock; /* mld query report lock */ 195 struct mutex mc_lock; /* mld global lock */ 196 197 struct ifacaddr6 __rcu *ac_list; 198 rwlock_t lock; 199 refcount_t refcnt; 200 __u32 if_flags; 201 int dead; 202 203 u32 desync_factor; 204 struct list_head tempaddr_list; 205 206 struct in6_addr token; 207 208 struct neigh_parms *nd_parms; 209 struct ipv6_devconf cnf; 210 struct ipv6_devstat stats; 211 212 struct timer_list rs_timer; 213 __s32 rs_interval; /* in jiffies */ 214 __u8 rs_probes; 215 216 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */ 217 struct rcu_head rcu; 218 219 unsigned int ra_mtu; 220 }; 221 222 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf) 223 { 224 /* 225 * +-------+-------+-------+-------+-------+-------+ 226 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 | 227 * +-------+-------+-------+-------+-------+-------+ 228 */ 229 230 buf[0]= 0x33; 231 buf[1]= 0x33; 232 233 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32)); 234 } 235 236 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf) 237 { 238 buf[0] = 0x00; 239 } 240 241 static inline void ipv6_ib_mc_map(const struct in6_addr *addr, 242 const unsigned char *broadcast, char *buf) 243 { 244 unsigned char scope = broadcast[5] & 0xF; 245 246 buf[0] = 0; /* Reserved */ 247 buf[1] = 0xff; /* Multicast QPN */ 248 buf[2] = 0xff; 249 buf[3] = 0xff; 250 buf[4] = 0xff; 251 buf[5] = 0x10 | scope; /* scope from broadcast address */ 252 buf[6] = 0x60; /* IPv6 signature */ 253 buf[7] = 0x1b; 254 buf[8] = broadcast[8]; /* P_Key */ 255 buf[9] = broadcast[9]; 256 memcpy(buf + 10, addr->s6_addr + 6, 10); 257 } 258 259 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr, 260 const unsigned char *broadcast, char *buf) 261 { 262 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) { 263 memcpy(buf, broadcast, 4); 264 } else { 265 /* v4mapped? */ 266 if ((addr->s6_addr32[0] | addr->s6_addr32[1] | 267 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0) 268 return -EINVAL; 269 memcpy(buf, &addr->s6_addr32[3], 4); 270 } 271 return 0; 272 } 273 274 #endif 275