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 struct hlist_node aca_addr_lst; 150 int aca_users; 151 refcount_t aca_refcnt; 152 unsigned long aca_cstamp; 153 unsigned long aca_tstamp; 154 struct rcu_head rcu; 155 }; 156 157 #define IFA_HOST IPV6_ADDR_LOOPBACK 158 #define IFA_LINK IPV6_ADDR_LINKLOCAL 159 #define IFA_SITE IPV6_ADDR_SITELOCAL 160 161 struct ipv6_devstat { 162 struct proc_dir_entry *proc_dir_entry; 163 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6); 164 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev); 165 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev); 166 }; 167 168 struct inet6_dev { 169 struct net_device *dev; 170 171 struct list_head addr_list; 172 173 struct ifmcaddr6 *mc_list; 174 struct ifmcaddr6 *mc_tomb; 175 spinlock_t mc_lock; 176 177 unsigned char mc_qrv; /* Query Robustness Variable */ 178 unsigned char mc_gq_running; 179 unsigned char mc_ifc_count; 180 unsigned char mc_dad_count; 181 182 unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */ 183 unsigned long mc_qi; /* Query Interval */ 184 unsigned long mc_qri; /* Query Response Interval */ 185 unsigned long mc_maxdelay; 186 187 struct timer_list mc_gq_timer; /* general query timer */ 188 struct timer_list mc_ifc_timer; /* interface change timer */ 189 struct timer_list mc_dad_timer; /* dad complete mc timer */ 190 191 struct ifacaddr6 *ac_list; 192 rwlock_t lock; 193 refcount_t refcnt; 194 __u32 if_flags; 195 int dead; 196 197 u32 desync_factor; 198 u8 rndid[8]; 199 struct list_head tempaddr_list; 200 201 struct in6_addr token; 202 203 struct neigh_parms *nd_parms; 204 struct ipv6_devconf cnf; 205 struct ipv6_devstat stats; 206 207 struct timer_list rs_timer; 208 __s32 rs_interval; /* in jiffies */ 209 __u8 rs_probes; 210 211 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */ 212 struct rcu_head rcu; 213 }; 214 215 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf) 216 { 217 /* 218 * +-------+-------+-------+-------+-------+-------+ 219 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 | 220 * +-------+-------+-------+-------+-------+-------+ 221 */ 222 223 buf[0]= 0x33; 224 buf[1]= 0x33; 225 226 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32)); 227 } 228 229 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf) 230 { 231 buf[0] = 0x00; 232 } 233 234 static inline void ipv6_ib_mc_map(const struct in6_addr *addr, 235 const unsigned char *broadcast, char *buf) 236 { 237 unsigned char scope = broadcast[5] & 0xF; 238 239 buf[0] = 0; /* Reserved */ 240 buf[1] = 0xff; /* Multicast QPN */ 241 buf[2] = 0xff; 242 buf[3] = 0xff; 243 buf[4] = 0xff; 244 buf[5] = 0x10 | scope; /* scope from broadcast address */ 245 buf[6] = 0x60; /* IPv6 signature */ 246 buf[7] = 0x1b; 247 buf[8] = broadcast[8]; /* P_Key */ 248 buf[9] = broadcast[9]; 249 memcpy(buf + 10, addr->s6_addr + 6, 10); 250 } 251 252 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr, 253 const unsigned char *broadcast, char *buf) 254 { 255 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) { 256 memcpy(buf, broadcast, 4); 257 } else { 258 /* v4mapped? */ 259 if ((addr->s6_addr32[0] | addr->s6_addr32[1] | 260 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0) 261 return -EINVAL; 262 memcpy(buf, &addr->s6_addr32[3], 4); 263 } 264 return 0; 265 } 266 267 #endif 268