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 #define IP6_SFBLOCK 10 /* allocate this many at once */ 92 93 struct ipv6_mc_socklist { 94 struct in6_addr addr; 95 int ifindex; 96 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */ 97 struct ipv6_mc_socklist __rcu *next; 98 struct ip6_sf_socklist __rcu *sflist; 99 struct rcu_head rcu; 100 }; 101 102 struct ip6_sf_list { 103 struct ip6_sf_list __rcu *sf_next; 104 struct in6_addr sf_addr; 105 unsigned long sf_count[2]; /* include/exclude counts */ 106 unsigned char sf_gsresp; /* include in g & s response? */ 107 unsigned char sf_oldin; /* change state */ 108 unsigned char sf_crcount; /* retrans. left to send */ 109 struct rcu_head rcu; 110 }; 111 112 #define MAF_TIMER_RUNNING 0x01 113 #define MAF_LAST_REPORTER 0x02 114 #define MAF_LOADED 0x04 115 #define MAF_NOREPORT 0x08 116 #define MAF_GSQUERY 0x10 117 118 struct ifmcaddr6 { 119 struct in6_addr mca_addr; 120 struct inet6_dev *idev; 121 struct ifmcaddr6 __rcu *next; 122 struct ip6_sf_list __rcu *mca_sources; 123 struct ip6_sf_list __rcu *mca_tomb; 124 unsigned int mca_sfmode; 125 unsigned char mca_crcount; 126 unsigned long mca_sfcount[2]; 127 struct delayed_work mca_work; 128 unsigned int mca_flags; 129 int mca_users; 130 refcount_t mca_refcnt; 131 unsigned long mca_cstamp; 132 unsigned long mca_tstamp; 133 struct rcu_head rcu; 134 }; 135 136 /* Anycast stuff */ 137 138 struct ipv6_ac_socklist { 139 struct in6_addr acl_addr; 140 int acl_ifindex; 141 struct ipv6_ac_socklist *acl_next; 142 }; 143 144 struct ifacaddr6 { 145 struct in6_addr aca_addr; 146 struct fib6_info *aca_rt; 147 struct ifacaddr6 __rcu *aca_next; 148 struct hlist_node aca_addr_lst; 149 int aca_users; 150 refcount_t aca_refcnt; 151 unsigned long aca_cstamp; 152 unsigned long aca_tstamp; 153 struct rcu_head rcu; 154 }; 155 156 #define IFA_HOST IPV6_ADDR_LOOPBACK 157 #define IFA_LINK IPV6_ADDR_LINKLOCAL 158 #define IFA_SITE IPV6_ADDR_SITELOCAL 159 160 struct ipv6_devstat { 161 struct proc_dir_entry *proc_dir_entry; 162 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6); 163 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev); 164 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev); 165 }; 166 167 struct inet6_dev { 168 struct net_device *dev; 169 netdevice_tracker dev_tracker; 170 171 struct list_head addr_list; 172 173 struct ifmcaddr6 __rcu *mc_list; 174 struct ifmcaddr6 __rcu *mc_tomb; 175 176 unsigned char mc_qrv; /* Query Robustness Variable */ 177 unsigned char mc_gq_running; 178 unsigned char mc_ifc_count; 179 unsigned char mc_dad_count; 180 181 unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */ 182 unsigned long mc_qi; /* Query Interval */ 183 unsigned long mc_qri; /* Query Response Interval */ 184 unsigned long mc_maxdelay; 185 186 struct delayed_work mc_gq_work; /* general query work */ 187 struct delayed_work mc_ifc_work; /* interface change work */ 188 struct delayed_work mc_dad_work; /* dad complete mc work */ 189 struct delayed_work mc_query_work; /* mld query work */ 190 struct delayed_work mc_report_work; /* mld report work */ 191 192 struct sk_buff_head mc_query_queue; /* mld query queue */ 193 struct sk_buff_head mc_report_queue; /* mld report queue */ 194 195 spinlock_t mc_query_lock; /* mld query queue lock */ 196 spinlock_t mc_report_lock; /* mld query report lock */ 197 struct mutex mc_lock; /* mld global lock */ 198 199 struct ifacaddr6 __rcu *ac_list; 200 rwlock_t lock; 201 refcount_t refcnt; 202 __u32 if_flags; 203 int dead; 204 205 u32 desync_factor; 206 struct list_head tempaddr_list; 207 208 struct in6_addr token; 209 210 struct neigh_parms *nd_parms; 211 struct ipv6_devconf cnf; 212 struct ipv6_devstat stats; 213 214 struct timer_list rs_timer; 215 __s32 rs_interval; /* in jiffies */ 216 __u8 rs_probes; 217 218 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */ 219 struct rcu_head rcu; 220 221 unsigned int ra_mtu; 222 }; 223 ipv6_eth_mc_map(const struct in6_addr * addr,char * buf)224 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf) 225 { 226 /* 227 * +-------+-------+-------+-------+-------+-------+ 228 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 | 229 * +-------+-------+-------+-------+-------+-------+ 230 */ 231 232 buf[0]= 0x33; 233 buf[1]= 0x33; 234 235 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32)); 236 } 237 ipv6_arcnet_mc_map(const struct in6_addr * addr,char * buf)238 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf) 239 { 240 buf[0] = 0x00; 241 } 242 ipv6_ib_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)243 static inline void ipv6_ib_mc_map(const struct in6_addr *addr, 244 const unsigned char *broadcast, char *buf) 245 { 246 unsigned char scope = broadcast[5] & 0xF; 247 248 buf[0] = 0; /* Reserved */ 249 buf[1] = 0xff; /* Multicast QPN */ 250 buf[2] = 0xff; 251 buf[3] = 0xff; 252 buf[4] = 0xff; 253 buf[5] = 0x10 | scope; /* scope from broadcast address */ 254 buf[6] = 0x60; /* IPv6 signature */ 255 buf[7] = 0x1b; 256 buf[8] = broadcast[8]; /* P_Key */ 257 buf[9] = broadcast[9]; 258 memcpy(buf + 10, addr->s6_addr + 6, 10); 259 } 260 ipv6_ipgre_mc_map(const struct in6_addr * addr,const unsigned char * broadcast,char * buf)261 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr, 262 const unsigned char *broadcast, char *buf) 263 { 264 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) { 265 memcpy(buf, broadcast, 4); 266 } else { 267 /* v4mapped? */ 268 if ((addr->s6_addr32[0] | addr->s6_addr32[1] | 269 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0) 270 return -EINVAL; 271 memcpy(buf, &addr->s6_addr32[3], 4); 272 } 273 return 0; 274 } 275 276 #endif 277