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