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/netdevice.h> 9 #include <linux/rcupdate.h> 10 #include <linux/timer.h> 11 #include <linux/sysctl.h> 12 #include <linux/rtnetlink.h> 13 14 enum 15 { 16 IPV4_DEVCONF_FORWARDING=1, 17 IPV4_DEVCONF_MC_FORWARDING, 18 IPV4_DEVCONF_PROXY_ARP, 19 IPV4_DEVCONF_ACCEPT_REDIRECTS, 20 IPV4_DEVCONF_SECURE_REDIRECTS, 21 IPV4_DEVCONF_SEND_REDIRECTS, 22 IPV4_DEVCONF_SHARED_MEDIA, 23 IPV4_DEVCONF_RP_FILTER, 24 IPV4_DEVCONF_ACCEPT_SOURCE_ROUTE, 25 IPV4_DEVCONF_BOOTP_RELAY, 26 IPV4_DEVCONF_LOG_MARTIANS, 27 IPV4_DEVCONF_TAG, 28 IPV4_DEVCONF_ARPFILTER, 29 IPV4_DEVCONF_MEDIUM_ID, 30 IPV4_DEVCONF_NOXFRM, 31 IPV4_DEVCONF_NOPOLICY, 32 IPV4_DEVCONF_FORCE_IGMP_VERSION, 33 IPV4_DEVCONF_ARP_ANNOUNCE, 34 IPV4_DEVCONF_ARP_IGNORE, 35 IPV4_DEVCONF_PROMOTE_SECONDARIES, 36 IPV4_DEVCONF_ARP_ACCEPT, 37 IPV4_DEVCONF_ARP_NOTIFY, 38 IPV4_DEVCONF_ACCEPT_LOCAL, 39 IPV4_DEVCONF_SRC_VMARK, 40 IPV4_DEVCONF_PROXY_ARP_PVLAN, 41 IPV4_DEVCONF_ROUTE_LOCALNET, 42 __IPV4_DEVCONF_MAX 43 }; 44 45 #define IPV4_DEVCONF_MAX (__IPV4_DEVCONF_MAX - 1) 46 47 struct ipv4_devconf { 48 void *sysctl; 49 int data[IPV4_DEVCONF_MAX]; 50 DECLARE_BITMAP(state, IPV4_DEVCONF_MAX); 51 }; 52 53 struct in_device { 54 struct net_device *dev; 55 atomic_t refcnt; 56 int dead; 57 struct in_ifaddr *ifa_list; /* IP ifaddr chain */ 58 struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */ 59 int mc_count; /* Number of installed mcasts */ 60 spinlock_t mc_tomb_lock; 61 struct ip_mc_list *mc_tomb; 62 unsigned long mr_v1_seen; 63 unsigned long mr_v2_seen; 64 unsigned long mr_maxdelay; 65 unsigned char mr_qrv; 66 unsigned char mr_gq_running; 67 unsigned char mr_ifc_count; 68 struct timer_list mr_gq_timer; /* general query timer */ 69 struct timer_list mr_ifc_timer; /* interface change timer */ 70 71 struct neigh_parms *arp_parms; 72 struct ipv4_devconf cnf; 73 struct rcu_head rcu_head; 74 }; 75 76 #define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1]) 77 #define IPV4_DEVCONF_ALL(net, attr) \ 78 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr) 79 80 static inline int ipv4_devconf_get(struct in_device *in_dev, int index) 81 { 82 index--; 83 return in_dev->cnf.data[index]; 84 } 85 86 static inline void ipv4_devconf_set(struct in_device *in_dev, int index, 87 int val) 88 { 89 index--; 90 set_bit(index, in_dev->cnf.state); 91 in_dev->cnf.data[index] = val; 92 } 93 94 static inline void ipv4_devconf_setall(struct in_device *in_dev) 95 { 96 bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX); 97 } 98 99 #define IN_DEV_CONF_GET(in_dev, attr) \ 100 ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr) 101 #define IN_DEV_CONF_SET(in_dev, attr, val) \ 102 ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val)) 103 104 #define IN_DEV_ANDCONF(in_dev, attr) \ 105 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \ 106 IN_DEV_CONF_GET((in_dev), attr)) 107 108 #define IN_DEV_NET_ORCONF(in_dev, net, attr) \ 109 (IPV4_DEVCONF_ALL(net, attr) || \ 110 IN_DEV_CONF_GET((in_dev), attr)) 111 112 #define IN_DEV_ORCONF(in_dev, attr) \ 113 IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr) 114 115 #define IN_DEV_MAXCONF(in_dev, attr) \ 116 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \ 117 IN_DEV_CONF_GET((in_dev), attr))) 118 119 #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING) 120 #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING) 121 #define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER) 122 #define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK) 123 #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \ 124 ACCEPT_SOURCE_ROUTE) 125 #define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL) 126 #define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY) 127 128 #define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS) 129 #define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP) 130 #define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN) 131 #define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA) 132 #define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS) 133 #define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \ 134 SECURE_REDIRECTS) 135 #define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG) 136 #define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID) 137 #define IN_DEV_PROMOTE_SECONDARIES(in_dev) \ 138 IN_DEV_ORCONF((in_dev), \ 139 PROMOTE_SECONDARIES) 140 #define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET) 141 #define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \ 142 IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET) 143 144 #define IN_DEV_RX_REDIRECTS(in_dev) \ 145 ((IN_DEV_FORWARD(in_dev) && \ 146 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \ 147 || (!IN_DEV_FORWARD(in_dev) && \ 148 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS))) 149 150 #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER) 151 #define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT) 152 #define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE) 153 #define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE) 154 #define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY) 155 156 struct in_ifaddr { 157 struct hlist_node hash; 158 struct in_ifaddr *ifa_next; 159 struct in_device *ifa_dev; 160 struct rcu_head rcu_head; 161 __be32 ifa_local; 162 __be32 ifa_address; 163 __be32 ifa_mask; 164 __be32 ifa_broadcast; 165 unsigned char ifa_scope; 166 unsigned char ifa_flags; 167 unsigned char ifa_prefixlen; 168 char ifa_label[IFNAMSIZ]; 169 }; 170 171 extern int register_inetaddr_notifier(struct notifier_block *nb); 172 extern int unregister_inetaddr_notifier(struct notifier_block *nb); 173 174 extern struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref); 175 static inline struct net_device *ip_dev_find(struct net *net, __be32 addr) 176 { 177 return __ip_dev_find(net, addr, true); 178 } 179 180 extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b); 181 extern int devinet_ioctl(struct net *net, unsigned int cmd, void __user *); 182 extern void devinet_init(void); 183 extern struct in_device *inetdev_by_index(struct net *, int); 184 extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope); 185 extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope); 186 extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask); 187 188 static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa) 189 { 190 return !((addr^ifa->ifa_address)&ifa->ifa_mask); 191 } 192 193 /* 194 * Check if a mask is acceptable. 195 */ 196 197 static __inline__ int bad_mask(__be32 mask, __be32 addr) 198 { 199 __u32 hmask; 200 if (addr & (mask = ~mask)) 201 return 1; 202 hmask = ntohl(mask); 203 if (hmask & (hmask+1)) 204 return 1; 205 return 0; 206 } 207 208 #define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \ 209 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next) 210 211 #define for_ifa(in_dev) { struct in_ifaddr *ifa; \ 212 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next) 213 214 215 #define endfor_ifa(in_dev) } 216 217 static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev) 218 { 219 return rcu_dereference(dev->ip_ptr); 220 } 221 222 static inline struct in_device *in_dev_get(const struct net_device *dev) 223 { 224 struct in_device *in_dev; 225 226 rcu_read_lock(); 227 in_dev = __in_dev_get_rcu(dev); 228 if (in_dev) 229 atomic_inc(&in_dev->refcnt); 230 rcu_read_unlock(); 231 return in_dev; 232 } 233 234 static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev) 235 { 236 return rtnl_dereference(dev->ip_ptr); 237 } 238 239 extern void in_dev_finish_destroy(struct in_device *idev); 240 241 static inline void in_dev_put(struct in_device *idev) 242 { 243 if (atomic_dec_and_test(&idev->refcnt)) 244 in_dev_finish_destroy(idev); 245 } 246 247 #define __in_dev_put(idev) atomic_dec(&(idev)->refcnt) 248 #define in_dev_hold(idev) atomic_inc(&(idev)->refcnt) 249 250 #endif /* __KERNEL__ */ 251 252 static __inline__ __be32 inet_make_mask(int logmask) 253 { 254 if (logmask) 255 return htonl(~((1<<(32-logmask))-1)); 256 return 0; 257 } 258 259 static __inline__ int inet_mask_len(__be32 mask) 260 { 261 __u32 hmask = ntohl(mask); 262 if (!hmask) 263 return 0; 264 return 32 - ffz(~hmask); 265 } 266 267 268 #endif /* _LINUX_INETDEVICE_H */ 269