| 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 type, int ifindex, |
| 157 | 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 */ |