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 u8 ifa_proto; 75 76 struct rcu_head rcu; 77 struct in6_addr peer_addr; 78 }; 79 80 struct ip6_sf_socklist { 81 unsigned int sl_max; 82 unsigned int sl_count; 83 struct rcu_head rcu; 84 struct in6_addr sl_addr[]; 85 }; 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 struct ip6_sf_socklist __rcu *sflist; 95 struct rcu_head rcu; 96 }; 97 98 struct ip6_sf_list { 99 struct ip6_sf_list __rcu *sf_next; 100 struct in6_addr sf_addr; 101 unsigned long sf_count[2]; /* include/exclude counts */ 102 unsigned char sf_gsresp; /* include in g & s response? */ 103 unsigned char sf_oldin; /* change state */ 104 unsigned char sf_crcount; /* retrans. left to send */ 105 struct rcu_head rcu; 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 __rcu *next; 118 struct ip6_sf_list __rcu *mca_sources; 119 struct ip6_sf_list __rcu *mca_tomb; 120 unsigned int mca_sfmode; 121 unsigned char mca_crcount; 122 unsigned long mca_sfcount[2]; 123 struct delayed_work mca_work; 124 unsigned int mca_flags; 125 int mca_users; 126 refcount_t mca_refcnt; 127 unsigned long mca_cstamp; 128 unsigned long mca_tstamp; 129 struct rcu_head rcu; 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 netdevice_tracker dev_tracker; 166 167 struct list_head addr_list; 168 169 struct ifmcaddr6 __rcu *mc_list; 170 struct ifmcaddr6 __rcu *mc_tomb; 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 delayed_work mc_gq_work; /* general query work */ 183 struct delayed_work mc_ifc_work; /* interface change work */ 184 struct delayed_work mc_dad_work; /* dad complete mc work */ 185 struct delayed_work mc_query_work; /* mld query work */ 186 struct delayed_work mc_report_work; /* mld report work */ 187 188 struct sk_buff_head mc_query_queue; /* mld query queue */ 189 struct sk_buff_head mc_report_queue; /* mld report queue */ 190 191 spinlock_t mc_query_lock; /* mld query queue lock */ 192 spinlock_t mc_report_lock; /* mld query report lock */ 193 struct mutex mc_lock; /* mld global lock */ 194 195 struct ifacaddr6 *ac_list; 196 rwlock_t lock; 197 refcount_t refcnt; 198 __u32 if_flags; 199 int dead; 200 201 u32 desync_factor; 202 struct list_head tempaddr_list; 203 204 struct in6_addr token; 205 206 struct neigh_parms *nd_parms; 207 struct ipv6_devconf cnf; 208 struct ipv6_devstat stats; 209 210 struct timer_list rs_timer; 211 __s32 rs_interval; /* in jiffies */ 212 __u8 rs_probes; 213 214 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */ 215 struct rcu_head rcu; 216 217 unsigned int ra_mtu; 218 }; 219 220 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf) 221 { 222 /* 223 * +-------+-------+-------+-------+-------+-------+ 224 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 | 225 * +-------+-------+-------+-------+-------+-------+ 226 */ 227 228 buf[0]= 0x33; 229 buf[1]= 0x33; 230 231 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32)); 232 } 233 234 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf) 235 { 236 buf[0] = 0x00; 237 } 238 239 static inline void ipv6_ib_mc_map(const struct in6_addr *addr, 240 const unsigned char *broadcast, char *buf) 241 { 242 unsigned char scope = broadcast[5] & 0xF; 243 244 buf[0] = 0; /* Reserved */ 245 buf[1] = 0xff; /* Multicast QPN */ 246 buf[2] = 0xff; 247 buf[3] = 0xff; 248 buf[4] = 0xff; 249 buf[5] = 0x10 | scope; /* scope from broadcast address */ 250 buf[6] = 0x60; /* IPv6 signature */ 251 buf[7] = 0x1b; 252 buf[8] = broadcast[8]; /* P_Key */ 253 buf[9] = broadcast[9]; 254 memcpy(buf + 10, addr->s6_addr + 6, 10); 255 } 256 257 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr, 258 const unsigned char *broadcast, char *buf) 259 { 260 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) { 261 memcpy(buf, broadcast, 4); 262 } else { 263 /* v4mapped? */ 264 if ((addr->s6_addr32[0] | addr->s6_addr32[1] | 265 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0) 266 return -EINVAL; 267 memcpy(buf, &addr->s6_addr32[3], 4); 268 } 269 return 0; 270 } 271 272 #endif 273