1 /* 2 * inet6 interface/address list definitions 3 * Linux INET6 implementation 4 * 5 * Authors: 6 * Pedro Roque <roque@di.fc.ul.pt> 7 * 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License 11 * as published by the Free Software Foundation; either version 12 * 2 of the License, or (at your option) any later version. 13 */ 14 15 #ifndef _NET_IF_INET6_H 16 #define _NET_IF_INET6_H 17 18 #include <net/snmp.h> 19 #include <linux/ipv6.h> 20 #include <linux/refcount.h> 21 22 /* inet6_dev.if_flags */ 23 24 #define IF_RA_OTHERCONF 0x80 25 #define IF_RA_MANAGED 0x40 26 #define IF_RA_RCVD 0x20 27 #define IF_RS_SENT 0x10 28 #define IF_READY 0x80000000 29 30 /* prefix flags */ 31 #define IF_PREFIX_ONLINK 0x01 32 #define IF_PREFIX_AUTOCONF 0x02 33 34 enum { 35 INET6_IFADDR_STATE_PREDAD, 36 INET6_IFADDR_STATE_DAD, 37 INET6_IFADDR_STATE_POSTDAD, 38 INET6_IFADDR_STATE_ERRDAD, 39 INET6_IFADDR_STATE_DEAD, 40 }; 41 42 struct inet6_ifaddr { 43 struct in6_addr addr; 44 __u32 prefix_len; 45 __u32 rt_priority; 46 47 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */ 48 __u32 valid_lft; 49 __u32 prefered_lft; 50 refcount_t refcnt; 51 spinlock_t lock; 52 53 int state; 54 55 __u32 flags; 56 __u8 dad_probes; 57 __u8 stable_privacy_retry; 58 59 __u16 scope; 60 __u64 dad_nonce; 61 62 unsigned long cstamp; /* created timestamp */ 63 unsigned long tstamp; /* updated timestamp */ 64 65 struct delayed_work dad_work; 66 67 struct inet6_dev *idev; 68 struct fib6_info *rt; 69 70 struct hlist_node addr_lst; 71 struct list_head if_list; 72 73 struct list_head tmp_list; 74 struct inet6_ifaddr *ifpub; 75 int regen_count; 76 77 bool tokenized; 78 79 struct rcu_head rcu; 80 struct in6_addr peer_addr; 81 }; 82 83 struct ip6_sf_socklist { 84 unsigned int sl_max; 85 unsigned int sl_count; 86 struct in6_addr sl_addr[0]; 87 }; 88 89 #define IP6_SFLSIZE(count) (sizeof(struct ip6_sf_socklist) + \ 90 (count) * sizeof(struct in6_addr)) 91 92 #define IP6_SFBLOCK 10 /* allocate this many at once */ 93 94 struct ipv6_mc_socklist { 95 struct in6_addr addr; 96 int ifindex; 97 struct ipv6_mc_socklist __rcu *next; 98 rwlock_t sflock; 99 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */ 100 struct ip6_sf_socklist *sflist; 101 struct rcu_head rcu; 102 }; 103 104 struct ip6_sf_list { 105 struct ip6_sf_list *sf_next; 106 struct in6_addr sf_addr; 107 unsigned long sf_count[2]; /* include/exclude counts */ 108 unsigned char sf_gsresp; /* include in g & s response? */ 109 unsigned char sf_oldin; /* change state */ 110 unsigned char sf_crcount; /* retrans. left to send */ 111 }; 112 113 #define MAF_TIMER_RUNNING 0x01 114 #define MAF_LAST_REPORTER 0x02 115 #define MAF_LOADED 0x04 116 #define MAF_NOREPORT 0x08 117 #define MAF_GSQUERY 0x10 118 119 struct ifmcaddr6 { 120 struct in6_addr mca_addr; 121 struct inet6_dev *idev; 122 struct ifmcaddr6 *next; 123 struct ip6_sf_list *mca_sources; 124 struct ip6_sf_list *mca_tomb; 125 unsigned int mca_sfmode; 126 unsigned char mca_crcount; 127 unsigned long mca_sfcount[2]; 128 struct timer_list mca_timer; 129 unsigned int mca_flags; 130 int mca_users; 131 refcount_t mca_refcnt; 132 spinlock_t mca_lock; 133 unsigned long mca_cstamp; 134 unsigned long mca_tstamp; 135 }; 136 137 /* Anycast stuff */ 138 139 struct ipv6_ac_socklist { 140 struct in6_addr acl_addr; 141 int acl_ifindex; 142 struct ipv6_ac_socklist *acl_next; 143 }; 144 145 struct ifacaddr6 { 146 struct in6_addr aca_addr; 147 struct fib6_info *aca_rt; 148 struct ifacaddr6 *aca_next; 149 int aca_users; 150 refcount_t aca_refcnt; 151 unsigned long aca_cstamp; 152 unsigned long aca_tstamp; 153 }; 154 155 #define IFA_HOST IPV6_ADDR_LOOPBACK 156 #define IFA_LINK IPV6_ADDR_LINKLOCAL 157 #define IFA_SITE IPV6_ADDR_SITELOCAL 158 159 struct ipv6_devstat { 160 struct proc_dir_entry *proc_dir_entry; 161 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6); 162 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev); 163 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev); 164 }; 165 166 struct inet6_dev { 167 struct net_device *dev; 168 169 struct list_head addr_list; 170 171 struct ifmcaddr6 *mc_list; 172 struct ifmcaddr6 *mc_tomb; 173 spinlock_t mc_lock; 174 175 unsigned char mc_qrv; /* Query Robustness Variable */ 176 unsigned char mc_gq_running; 177 unsigned char mc_ifc_count; 178 unsigned char mc_dad_count; 179 180 unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */ 181 unsigned long mc_qi; /* Query Interval */ 182 unsigned long mc_qri; /* Query Response Interval */ 183 unsigned long mc_maxdelay; 184 185 struct timer_list mc_gq_timer; /* general query timer */ 186 struct timer_list mc_ifc_timer; /* interface change timer */ 187 struct timer_list mc_dad_timer; /* dad complete mc timer */ 188 189 struct ifacaddr6 *ac_list; 190 rwlock_t lock; 191 refcount_t refcnt; 192 __u32 if_flags; 193 int dead; 194 195 u32 desync_factor; 196 u8 rndid[8]; 197 struct list_head tempaddr_list; 198 199 struct in6_addr token; 200 201 struct neigh_parms *nd_parms; 202 struct ipv6_devconf cnf; 203 struct ipv6_devstat stats; 204 205 struct timer_list rs_timer; 206 __s32 rs_interval; /* in jiffies */ 207 __u8 rs_probes; 208 209 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */ 210 struct rcu_head rcu; 211 }; 212 213 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf) 214 { 215 /* 216 * +-------+-------+-------+-------+-------+-------+ 217 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 | 218 * +-------+-------+-------+-------+-------+-------+ 219 */ 220 221 buf[0]= 0x33; 222 buf[1]= 0x33; 223 224 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32)); 225 } 226 227 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf) 228 { 229 buf[0] = 0x00; 230 } 231 232 static inline void ipv6_ib_mc_map(const struct in6_addr *addr, 233 const unsigned char *broadcast, char *buf) 234 { 235 unsigned char scope = broadcast[5] & 0xF; 236 237 buf[0] = 0; /* Reserved */ 238 buf[1] = 0xff; /* Multicast QPN */ 239 buf[2] = 0xff; 240 buf[3] = 0xff; 241 buf[4] = 0xff; 242 buf[5] = 0x10 | scope; /* scope from broadcast address */ 243 buf[6] = 0x60; /* IPv6 signature */ 244 buf[7] = 0x1b; 245 buf[8] = broadcast[8]; /* P_Key */ 246 buf[9] = broadcast[9]; 247 memcpy(buf + 10, addr->s6_addr + 6, 10); 248 } 249 250 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr, 251 const unsigned char *broadcast, char *buf) 252 { 253 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) { 254 memcpy(buf, broadcast, 4); 255 } else { 256 /* v4mapped? */ 257 if ((addr->s6_addr32[0] | addr->s6_addr32[1] | 258 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0) 259 return -EINVAL; 260 memcpy(buf, &addr->s6_addr32[3], 4); 261 } 262 return 0; 263 } 264 265 #endif 266