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 21 /* inet6_dev.if_flags */ 22 23 #define IF_RA_OTHERCONF 0x80 24 #define IF_RA_MANAGED 0x40 25 #define IF_RA_RCVD 0x20 26 #define IF_RS_SENT 0x10 27 #define IF_READY 0x80000000 28 29 /* prefix flags */ 30 #define IF_PREFIX_ONLINK 0x01 31 #define IF_PREFIX_AUTOCONF 0x02 32 33 enum { 34 INET6_IFADDR_STATE_PREDAD, 35 INET6_IFADDR_STATE_DAD, 36 INET6_IFADDR_STATE_POSTDAD, 37 INET6_IFADDR_STATE_ERRDAD, 38 INET6_IFADDR_STATE_UP, 39 INET6_IFADDR_STATE_DEAD, 40 }; 41 42 struct inet6_ifaddr { 43 struct in6_addr addr; 44 __u32 prefix_len; 45 46 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */ 47 __u32 valid_lft; 48 __u32 prefered_lft; 49 atomic_t refcnt; 50 spinlock_t lock; 51 spinlock_t state_lock; 52 53 int state; 54 55 __u32 flags; 56 __u8 dad_probes; 57 58 __u16 scope; 59 60 unsigned long cstamp; /* created timestamp */ 61 unsigned long tstamp; /* updated timestamp */ 62 63 struct delayed_work dad_work; 64 65 struct inet6_dev *idev; 66 struct rt6_info *rt; 67 68 struct hlist_node addr_lst; 69 struct list_head if_list; 70 71 struct list_head tmp_list; 72 struct inet6_ifaddr *ifpub; 73 int regen_count; 74 75 bool tokenized; 76 77 struct rcu_head rcu; 78 struct in6_addr peer_addr; 79 }; 80 81 struct ip6_sf_socklist { 82 unsigned int sl_max; 83 unsigned int sl_count; 84 struct in6_addr sl_addr[0]; 85 }; 86 87 #define IP6_SFLSIZE(count) (sizeof(struct ip6_sf_socklist) + \ 88 (count) * sizeof(struct in6_addr)) 89 90 #define IP6_SFBLOCK 10 /* allocate this many at once */ 91 92 struct ipv6_mc_socklist { 93 struct in6_addr addr; 94 int ifindex; 95 struct ipv6_mc_socklist __rcu *next; 96 rwlock_t sflock; 97 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */ 98 struct ip6_sf_socklist *sflist; 99 struct rcu_head rcu; 100 }; 101 102 struct ip6_sf_list { 103 struct ip6_sf_list *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 }; 110 111 #define MAF_TIMER_RUNNING 0x01 112 #define MAF_LAST_REPORTER 0x02 113 #define MAF_LOADED 0x04 114 #define MAF_NOREPORT 0x08 115 #define MAF_GSQUERY 0x10 116 117 struct ifmcaddr6 { 118 struct in6_addr mca_addr; 119 struct inet6_dev *idev; 120 struct ifmcaddr6 *next; 121 struct ip6_sf_list *mca_sources; 122 struct ip6_sf_list *mca_tomb; 123 unsigned int mca_sfmode; 124 unsigned char mca_crcount; 125 unsigned long mca_sfcount[2]; 126 struct timer_list mca_timer; 127 unsigned int mca_flags; 128 int mca_users; 129 atomic_t mca_refcnt; 130 spinlock_t mca_lock; 131 unsigned long mca_cstamp; 132 unsigned long mca_tstamp; 133 }; 134 135 /* Anycast stuff */ 136 137 struct ipv6_ac_socklist { 138 struct in6_addr acl_addr; 139 int acl_ifindex; 140 struct ipv6_ac_socklist *acl_next; 141 }; 142 143 struct ifacaddr6 { 144 struct in6_addr aca_addr; 145 struct inet6_dev *aca_idev; 146 struct rt6_info *aca_rt; 147 struct ifacaddr6 *aca_next; 148 int aca_users; 149 atomic_t aca_refcnt; 150 spinlock_t aca_lock; 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 atomic_t refcnt; 192 __u32 if_flags; 193 int dead; 194 195 u8 rndid[8]; 196 struct timer_list regen_timer; 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 __u8 rs_probes; 207 208 __u8 addr_gen_mode; 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