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