1 #ifndef _LINUX_INETDEVICE_H 2 #define _LINUX_INETDEVICE_H 3 4 #ifdef __KERNEL__ 5 6 #include <linux/bitmap.h> 7 #include <linux/if.h> 8 #include <linux/ip.h> 9 #include <linux/netdevice.h> 10 #include <linux/rcupdate.h> 11 #include <linux/timer.h> 12 #include <linux/sysctl.h> 13 #include <linux/rtnetlink.h> 14 #include <linux/refcount.h> 15 16 struct ipv4_devconf { 17 void *sysctl; 18 int data[IPV4_DEVCONF_MAX]; 19 DECLARE_BITMAP(state, IPV4_DEVCONF_MAX); 20 }; 21 22 #define MC_HASH_SZ_LOG 9 23 24 struct in_device { 25 struct net_device *dev; 26 refcount_t refcnt; 27 int dead; 28 struct in_ifaddr *ifa_list; /* IP ifaddr chain */ 29 30 struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */ 31 struct ip_mc_list __rcu * __rcu *mc_hash; 32 33 int mc_count; /* Number of installed mcasts */ 34 spinlock_t mc_tomb_lock; 35 struct ip_mc_list *mc_tomb; 36 unsigned long mr_v1_seen; 37 unsigned long mr_v2_seen; 38 unsigned long mr_maxdelay; 39 unsigned char mr_qrv; 40 unsigned char mr_gq_running; 41 unsigned char mr_ifc_count; 42 struct timer_list mr_gq_timer; /* general query timer */ 43 struct timer_list mr_ifc_timer; /* interface change timer */ 44 45 struct neigh_parms *arp_parms; 46 struct ipv4_devconf cnf; 47 struct rcu_head rcu_head; 48 }; 49 50 #define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1]) 51 #define IPV4_DEVCONF_ALL(net, attr) \ 52 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr) 53 54 static inline int ipv4_devconf_get(struct in_device *in_dev, int index) 55 { 56 index--; 57 return in_dev->cnf.data[index]; 58 } 59 60 static inline void ipv4_devconf_set(struct in_device *in_dev, int index, 61 int val) 62 { 63 index--; 64 set_bit(index, in_dev->cnf.state); 65 in_dev->cnf.data[index] = val; 66 } 67 68 static inline void ipv4_devconf_setall(struct in_device *in_dev) 69 { 70 bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX); 71 } 72 73 #define IN_DEV_CONF_GET(in_dev, attr) \ 74 ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr) 75 #define IN_DEV_CONF_SET(in_dev, attr, val) \ 76 ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val)) 77 78 #define IN_DEV_ANDCONF(in_dev, attr) \ 79 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \ 80 IN_DEV_CONF_GET((in_dev), attr)) 81 82 #define IN_DEV_NET_ORCONF(in_dev, net, attr) \ 83 (IPV4_DEVCONF_ALL(net, attr) || \ 84 IN_DEV_CONF_GET((in_dev), attr)) 85 86 #define IN_DEV_ORCONF(in_dev, attr) \ 87 IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr) 88 89 #define IN_DEV_MAXCONF(in_dev, attr) \ 90 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \ 91 IN_DEV_CONF_GET((in_dev), attr))) 92 93 #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING) 94 #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING) 95 #define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER) 96 #define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK) 97 #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \ 98 ACCEPT_SOURCE_ROUTE) 99 #define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL) 100 #define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY) 101 102 #define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS) 103 #define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP) 104 #define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN) 105 #define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA) 106 #define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS) 107 #define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \ 108 SECURE_REDIRECTS) 109 #define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG) 110 #define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID) 111 #define IN_DEV_PROMOTE_SECONDARIES(in_dev) \ 112 IN_DEV_ORCONF((in_dev), \ 113 PROMOTE_SECONDARIES) 114 #define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET) 115 #define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \ 116 IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET) 117 118 #define IN_DEV_RX_REDIRECTS(in_dev) \ 119 ((IN_DEV_FORWARD(in_dev) && \ 120 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \ 121 || (!IN_DEV_FORWARD(in_dev) && \ 122 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS))) 123 124 #define IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) \ 125 IN_DEV_CONF_GET((in_dev), IGNORE_ROUTES_WITH_LINKDOWN) 126 127 #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER) 128 #define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT) 129 #define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE) 130 #define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE) 131 #define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY) 132 133 struct in_ifaddr { 134 struct hlist_node hash; 135 struct in_ifaddr *ifa_next; 136 struct in_device *ifa_dev; 137 struct rcu_head rcu_head; 138 __be32 ifa_local; 139 __be32 ifa_address; 140 __be32 ifa_mask; 141 __be32 ifa_broadcast; 142 unsigned char ifa_scope; 143 unsigned char ifa_prefixlen; 144 __u32 ifa_flags; 145 char ifa_label[IFNAMSIZ]; 146 147 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */ 148 __u32 ifa_valid_lft; 149 __u32 ifa_preferred_lft; 150 unsigned long ifa_cstamp; /* created timestamp */ 151 unsigned long ifa_tstamp; /* updated timestamp */ 152 }; 153 154 struct in_validator_info { 155 __be32 ivi_addr; 156 struct in_device *ivi_dev; 157 }; 158 159 int register_inetaddr_notifier(struct notifier_block *nb); 160 int unregister_inetaddr_notifier(struct notifier_block *nb); 161 int register_inetaddr_validator_notifier(struct notifier_block *nb); 162 int unregister_inetaddr_validator_notifier(struct notifier_block *nb); 163 164 void inet_netconf_notify_devconf(struct net *net, int event, int type, 165 int ifindex, struct ipv4_devconf *devconf); 166 167 struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref); 168 static inline struct net_device *ip_dev_find(struct net *net, __be32 addr) 169 { 170 return __ip_dev_find(net, addr, true); 171 } 172 173 int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b); 174 int devinet_ioctl(struct net *net, unsigned int cmd, void __user *); 175 void devinet_init(void); 176 struct in_device *inetdev_by_index(struct net *, int); 177 __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope); 178 __be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, __be32 dst, 179 __be32 local, int scope); 180 struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, 181 __be32 mask); 182 static __inline__ bool inet_ifa_match(__be32 addr, struct in_ifaddr *ifa) 183 { 184 return !((addr^ifa->ifa_address)&ifa->ifa_mask); 185 } 186 187 /* 188 * Check if a mask is acceptable. 189 */ 190 191 static __inline__ bool bad_mask(__be32 mask, __be32 addr) 192 { 193 __u32 hmask; 194 if (addr & (mask = ~mask)) 195 return true; 196 hmask = ntohl(mask); 197 if (hmask & (hmask+1)) 198 return true; 199 return false; 200 } 201 202 #define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \ 203 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next) 204 205 #define for_ifa(in_dev) { struct in_ifaddr *ifa; \ 206 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next) 207 208 209 #define endfor_ifa(in_dev) } 210 211 static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev) 212 { 213 return rcu_dereference(dev->ip_ptr); 214 } 215 216 static inline struct in_device *in_dev_get(const struct net_device *dev) 217 { 218 struct in_device *in_dev; 219 220 rcu_read_lock(); 221 in_dev = __in_dev_get_rcu(dev); 222 if (in_dev) 223 refcount_inc(&in_dev->refcnt); 224 rcu_read_unlock(); 225 return in_dev; 226 } 227 228 static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev) 229 { 230 return rtnl_dereference(dev->ip_ptr); 231 } 232 233 static inline struct neigh_parms *__in_dev_arp_parms_get_rcu(const struct net_device *dev) 234 { 235 struct in_device *in_dev = __in_dev_get_rcu(dev); 236 237 return in_dev ? in_dev->arp_parms : NULL; 238 } 239 240 void in_dev_finish_destroy(struct in_device *idev); 241 242 static inline void in_dev_put(struct in_device *idev) 243 { 244 if (refcount_dec_and_test(&idev->refcnt)) 245 in_dev_finish_destroy(idev); 246 } 247 248 #define __in_dev_put(idev) refcount_dec(&(idev)->refcnt) 249 #define in_dev_hold(idev) refcount_inc(&(idev)->refcnt) 250 251 #endif /* __KERNEL__ */ 252 253 static __inline__ __be32 inet_make_mask(int logmask) 254 { 255 if (logmask) 256 return htonl(~((1U<<(32-logmask))-1)); 257 return 0; 258 } 259 260 static __inline__ int inet_mask_len(__be32 mask) 261 { 262 __u32 hmask = ntohl(mask); 263 if (!hmask) 264 return 0; 265 return 32 - ffz(~hmask); 266 } 267 268 269 #endif /* _LINUX_INETDEVICE_H */ 270