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_DEAD, 39 }; 40 41 struct inet6_ifaddr { 42 struct in6_addr addr; 43 __u32 prefix_len; 44 45 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */ 46 __u32 valid_lft; 47 __u32 prefered_lft; 48 atomic_t refcnt; 49 spinlock_t lock; 50 51 int state; 52 53 __u32 flags; 54 __u8 dad_probes; 55 __u8 stable_privacy_retry; 56 57 __u16 scope; 58 59 unsigned long cstamp; /* created timestamp */ 60 unsigned long tstamp; /* updated timestamp */ 61 62 struct delayed_work dad_work; 63 64 struct inet6_dev *idev; 65 struct rt6_info *rt; 66 67 struct hlist_node addr_lst; 68 struct list_head if_list; 69 70 struct list_head tmp_list; 71 struct inet6_ifaddr *ifpub; 72 int regen_count; 73 74 bool tokenized; 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 in6_addr sl_addr[0]; 84 }; 85 86 #define IP6_SFLSIZE(count) (sizeof(struct ip6_sf_socklist) + \ 87 (count) * sizeof(struct in6_addr)) 88 89 #define IP6_SFBLOCK 10 /* allocate this many at once */ 90 91 struct ipv6_mc_socklist { 92 struct in6_addr addr; 93 int ifindex; 94 struct ipv6_mc_socklist __rcu *next; 95 rwlock_t sflock; 96 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */ 97 struct ip6_sf_socklist *sflist; 98 struct rcu_head rcu; 99 }; 100 101 struct ip6_sf_list { 102 struct ip6_sf_list *sf_next; 103 struct in6_addr sf_addr; 104 unsigned long sf_count[2]; /* include/exclude counts */ 105 unsigned char sf_gsresp; /* include in g & s response? */ 106 unsigned char sf_oldin; /* change state */ 107 unsigned char sf_crcount; /* retrans. left to send */ 108 }; 109 110 #define MAF_TIMER_RUNNING 0x01 111 #define MAF_LAST_REPORTER 0x02 112 #define MAF_LOADED 0x04 113 #define MAF_NOREPORT 0x08 114 #define MAF_GSQUERY 0x10 115 116 struct ifmcaddr6 { 117 struct in6_addr mca_addr; 118 struct inet6_dev *idev; 119 struct ifmcaddr6 *next; 120 struct ip6_sf_list *mca_sources; 121 struct ip6_sf_list *mca_tomb; 122 unsigned int mca_sfmode; 123 unsigned char mca_crcount; 124 unsigned long mca_sfcount[2]; 125 struct timer_list mca_timer; 126 unsigned int mca_flags; 127 int mca_users; 128 atomic_t mca_refcnt; 129 spinlock_t mca_lock; 130 unsigned long mca_cstamp; 131 unsigned long mca_tstamp; 132 }; 133 134 /* Anycast stuff */ 135 136 struct ipv6_ac_socklist { 137 struct in6_addr acl_addr; 138 int acl_ifindex; 139 struct ipv6_ac_socklist *acl_next; 140 }; 141 142 struct ifacaddr6 { 143 struct in6_addr aca_addr; 144 struct inet6_dev *aca_idev; 145 struct rt6_info *aca_rt; 146 struct ifacaddr6 *aca_next; 147 int aca_users; 148 atomic_t aca_refcnt; 149 unsigned long aca_cstamp; 150 unsigned long aca_tstamp; 151 }; 152 153 #define IFA_HOST IPV6_ADDR_LOOPBACK 154 #define IFA_LINK IPV6_ADDR_LINKLOCAL 155 #define IFA_SITE IPV6_ADDR_SITELOCAL 156 157 struct ipv6_devstat { 158 struct proc_dir_entry *proc_dir_entry; 159 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6); 160 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev); 161 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev); 162 }; 163 164 struct inet6_dev { 165 struct net_device *dev; 166 167 struct list_head addr_list; 168 169 struct ifmcaddr6 *mc_list; 170 struct ifmcaddr6 *mc_tomb; 171 spinlock_t mc_lock; 172 173 unsigned char mc_qrv; /* Query Robustness Variable */ 174 unsigned char mc_gq_running; 175 unsigned char mc_ifc_count; 176 unsigned char mc_dad_count; 177 178 unsigned long mc_v1_seen; /* Max time we stay in MLDv1 mode */ 179 unsigned long mc_qi; /* Query Interval */ 180 unsigned long mc_qri; /* Query Response Interval */ 181 unsigned long mc_maxdelay; 182 183 struct timer_list mc_gq_timer; /* general query timer */ 184 struct timer_list mc_ifc_timer; /* interface change timer */ 185 struct timer_list mc_dad_timer; /* dad complete mc timer */ 186 187 struct ifacaddr6 *ac_list; 188 rwlock_t lock; 189 atomic_t refcnt; 190 __u32 if_flags; 191 int dead; 192 193 u8 rndid[8]; 194 struct timer_list regen_timer; 195 struct list_head tempaddr_list; 196 197 struct in6_addr token; 198 199 struct neigh_parms *nd_parms; 200 struct ipv6_devconf cnf; 201 struct ipv6_devstat stats; 202 203 struct timer_list rs_timer; 204 __u8 rs_probes; 205 206 __u8 addr_gen_mode; 207 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */ 208 struct rcu_head rcu; 209 }; 210 211 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf) 212 { 213 /* 214 * +-------+-------+-------+-------+-------+-------+ 215 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 | 216 * +-------+-------+-------+-------+-------+-------+ 217 */ 218 219 buf[0]= 0x33; 220 buf[1]= 0x33; 221 222 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32)); 223 } 224 225 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf) 226 { 227 buf[0] = 0x00; 228 } 229 230 static inline void ipv6_ib_mc_map(const struct in6_addr *addr, 231 const unsigned char *broadcast, char *buf) 232 { 233 unsigned char scope = broadcast[5] & 0xF; 234 235 buf[0] = 0; /* Reserved */ 236 buf[1] = 0xff; /* Multicast QPN */ 237 buf[2] = 0xff; 238 buf[3] = 0xff; 239 buf[4] = 0xff; 240 buf[5] = 0x10 | scope; /* scope from broadcast address */ 241 buf[6] = 0x60; /* IPv6 signature */ 242 buf[7] = 0x1b; 243 buf[8] = broadcast[8]; /* P_Key */ 244 buf[9] = broadcast[9]; 245 memcpy(buf + 10, addr->s6_addr + 6, 10); 246 } 247 248 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr, 249 const unsigned char *broadcast, char *buf) 250 { 251 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) { 252 memcpy(buf, broadcast, 4); 253 } else { 254 /* v4mapped? */ 255 if ((addr->s6_addr32[0] | addr->s6_addr32[1] | 256 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0) 257 return -EINVAL; 258 memcpy(buf, &addr->s6_addr32[3], 4); 259 } 260 return 0; 261 } 262 263 #endif 264