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_DAD, 35 INET6_IFADDR_STATE_POSTDAD, 36 INET6_IFADDR_STATE_UP, 37 INET6_IFADDR_STATE_DEAD, 38 }; 39 40 struct inet6_ifaddr { 41 struct in6_addr addr; 42 __u32 prefix_len; 43 44 __u32 valid_lft; 45 __u32 prefered_lft; 46 atomic_t refcnt; 47 spinlock_t lock; 48 spinlock_t state_lock; 49 50 int state; 51 52 __u8 probes; 53 __u8 flags; 54 55 __u16 scope; 56 57 unsigned long cstamp; /* created timestamp */ 58 unsigned long tstamp; /* updated timestamp */ 59 60 struct timer_list timer; 61 62 struct inet6_dev *idev; 63 struct rt6_info *rt; 64 65 struct hlist_node addr_lst; 66 struct list_head if_list; 67 68 #ifdef CONFIG_IPV6_PRIVACY 69 struct list_head tmp_list; 70 struct inet6_ifaddr *ifpub; 71 int regen_count; 72 #endif 73 struct rcu_head rcu; 74 }; 75 76 struct ip6_sf_socklist { 77 unsigned int sl_max; 78 unsigned int sl_count; 79 struct in6_addr sl_addr[0]; 80 }; 81 82 #define IP6_SFLSIZE(count) (sizeof(struct ip6_sf_socklist) + \ 83 (count) * sizeof(struct in6_addr)) 84 85 #define IP6_SFBLOCK 10 /* allocate this many at once */ 86 87 struct ipv6_mc_socklist { 88 struct in6_addr addr; 89 int ifindex; 90 struct ipv6_mc_socklist __rcu *next; 91 rwlock_t sflock; 92 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */ 93 struct ip6_sf_socklist *sflist; 94 struct rcu_head rcu; 95 }; 96 97 struct ip6_sf_list { 98 struct ip6_sf_list *sf_next; 99 struct in6_addr sf_addr; 100 unsigned long sf_count[2]; /* include/exclude counts */ 101 unsigned char sf_gsresp; /* include in g & s response? */ 102 unsigned char sf_oldin; /* change state */ 103 unsigned char sf_crcount; /* retrans. left to send */ 104 }; 105 106 #define MAF_TIMER_RUNNING 0x01 107 #define MAF_LAST_REPORTER 0x02 108 #define MAF_LOADED 0x04 109 #define MAF_NOREPORT 0x08 110 #define MAF_GSQUERY 0x10 111 112 struct ifmcaddr6 { 113 struct in6_addr mca_addr; 114 struct inet6_dev *idev; 115 struct ifmcaddr6 *next; 116 struct ip6_sf_list *mca_sources; 117 struct ip6_sf_list *mca_tomb; 118 unsigned int mca_sfmode; 119 unsigned char mca_crcount; 120 unsigned long mca_sfcount[2]; 121 struct timer_list mca_timer; 122 unsigned mca_flags; 123 int mca_users; 124 atomic_t mca_refcnt; 125 spinlock_t mca_lock; 126 unsigned long mca_cstamp; 127 unsigned long mca_tstamp; 128 }; 129 130 /* Anycast stuff */ 131 132 struct ipv6_ac_socklist { 133 struct in6_addr acl_addr; 134 int acl_ifindex; 135 struct ipv6_ac_socklist *acl_next; 136 }; 137 138 struct ifacaddr6 { 139 struct in6_addr aca_addr; 140 struct inet6_dev *aca_idev; 141 struct rt6_info *aca_rt; 142 struct ifacaddr6 *aca_next; 143 int aca_users; 144 atomic_t aca_refcnt; 145 spinlock_t aca_lock; 146 unsigned long aca_cstamp; 147 unsigned long aca_tstamp; 148 }; 149 150 #define IFA_HOST IPV6_ADDR_LOOPBACK 151 #define IFA_LINK IPV6_ADDR_LINKLOCAL 152 #define IFA_SITE IPV6_ADDR_SITELOCAL 153 154 struct ipv6_devstat { 155 struct proc_dir_entry *proc_dir_entry; 156 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6); 157 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6_mib_device, icmpv6dev); 158 DEFINE_SNMP_STAT_ATOMIC(struct icmpv6msg_mib_device, icmpv6msgdev); 159 }; 160 161 struct inet6_dev { 162 struct net_device *dev; 163 164 struct list_head addr_list; 165 166 struct ifmcaddr6 *mc_list; 167 struct ifmcaddr6 *mc_tomb; 168 spinlock_t mc_lock; 169 unsigned char mc_qrv; 170 unsigned char mc_gq_running; 171 unsigned char mc_ifc_count; 172 unsigned long mc_v1_seen; 173 unsigned long mc_maxdelay; 174 struct timer_list mc_gq_timer; /* general query timer */ 175 struct timer_list mc_ifc_timer; /* interface change timer */ 176 177 struct ifacaddr6 *ac_list; 178 rwlock_t lock; 179 atomic_t refcnt; 180 __u32 if_flags; 181 int dead; 182 183 #ifdef CONFIG_IPV6_PRIVACY 184 u8 rndid[8]; 185 struct timer_list regen_timer; 186 struct list_head tempaddr_list; 187 #endif 188 189 struct neigh_parms *nd_parms; 190 struct inet6_dev *next; 191 struct ipv6_devconf cnf; 192 struct ipv6_devstat stats; 193 unsigned long tstamp; /* ipv6InterfaceTable update timestamp */ 194 struct rcu_head rcu; 195 }; 196 197 static inline void ipv6_eth_mc_map(const struct in6_addr *addr, char *buf) 198 { 199 /* 200 * +-------+-------+-------+-------+-------+-------+ 201 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 | 202 * +-------+-------+-------+-------+-------+-------+ 203 */ 204 205 buf[0]= 0x33; 206 buf[1]= 0x33; 207 208 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32)); 209 } 210 211 static inline void ipv6_tr_mc_map(const struct in6_addr *addr, char *buf) 212 { 213 /* All nodes FF01::1, FF02::1, FF02::1:FFxx:xxxx */ 214 215 if (((addr->s6_addr[0] == 0xFF) && 216 ((addr->s6_addr[1] == 0x01) || (addr->s6_addr[1] == 0x02)) && 217 (addr->s6_addr16[1] == 0) && 218 (addr->s6_addr32[1] == 0) && 219 (addr->s6_addr32[2] == 0) && 220 (addr->s6_addr16[6] == 0) && 221 (addr->s6_addr[15] == 1)) || 222 ((addr->s6_addr[0] == 0xFF) && 223 (addr->s6_addr[1] == 0x02) && 224 (addr->s6_addr16[1] == 0) && 225 (addr->s6_addr32[1] == 0) && 226 (addr->s6_addr16[4] == 0) && 227 (addr->s6_addr[10] == 0) && 228 (addr->s6_addr[11] == 1) && 229 (addr->s6_addr[12] == 0xff))) 230 { 231 buf[0]=0xC0; 232 buf[1]=0x00; 233 buf[2]=0x01; 234 buf[3]=0x00; 235 buf[4]=0x00; 236 buf[5]=0x00; 237 /* All routers FF0x::2 */ 238 } else if ((addr->s6_addr[0] ==0xff) && 239 ((addr->s6_addr[1] & 0xF0) == 0) && 240 (addr->s6_addr16[1] == 0) && 241 (addr->s6_addr32[1] == 0) && 242 (addr->s6_addr32[2] == 0) && 243 (addr->s6_addr16[6] == 0) && 244 (addr->s6_addr[15] == 2)) 245 { 246 buf[0]=0xC0; 247 buf[1]=0x00; 248 buf[2]=0x02; 249 buf[3]=0x00; 250 buf[4]=0x00; 251 buf[5]=0x00; 252 } else { 253 unsigned char i ; 254 255 i = addr->s6_addr[15] & 7 ; 256 buf[0]=0xC0; 257 buf[1]=0x00; 258 buf[2]=0x00; 259 buf[3]=0x01 << i ; 260 buf[4]=0x00; 261 buf[5]=0x00; 262 } 263 } 264 265 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf) 266 { 267 buf[0] = 0x00; 268 } 269 270 static inline void ipv6_ib_mc_map(const struct in6_addr *addr, 271 const unsigned char *broadcast, char *buf) 272 { 273 unsigned char scope = broadcast[5] & 0xF; 274 275 buf[0] = 0; /* Reserved */ 276 buf[1] = 0xff; /* Multicast QPN */ 277 buf[2] = 0xff; 278 buf[3] = 0xff; 279 buf[4] = 0xff; 280 buf[5] = 0x10 | scope; /* scope from broadcast address */ 281 buf[6] = 0x60; /* IPv6 signature */ 282 buf[7] = 0x1b; 283 buf[8] = broadcast[8]; /* P_Key */ 284 buf[9] = broadcast[9]; 285 memcpy(buf + 10, addr->s6_addr + 6, 10); 286 } 287 288 static inline int ipv6_ipgre_mc_map(const struct in6_addr *addr, 289 const unsigned char *broadcast, char *buf) 290 { 291 if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0) { 292 memcpy(buf, broadcast, 4); 293 } else { 294 /* v4mapped? */ 295 if ((addr->s6_addr32[0] | addr->s6_addr32[1] | 296 (addr->s6_addr32[2] ^ htonl(0x0000ffff))) != 0) 297 return -EINVAL; 298 memcpy(buf, &addr->s6_addr32[3], 4); 299 } 300 return 0; 301 } 302 303 #endif 304