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1da177e4 LT |
1 | #ifndef _LINUX_INETDEVICE_H |
2 | #define _LINUX_INETDEVICE_H | |
3 | ||
4 | #ifdef __KERNEL__ | |
5 | ||
31be3085 | 6 | #include <linux/bitmap.h> |
1da177e4 | 7 | #include <linux/if.h> |
4a5a8aa6 | 8 | #include <linux/ip.h> |
1da177e4 LT |
9 | #include <linux/netdevice.h> |
10 | #include <linux/rcupdate.h> | |
11 | #include <linux/timer.h> | |
8bfe6d68 | 12 | #include <linux/sysctl.h> |
95ae6b22 | 13 | #include <linux/rtnetlink.h> |
7658b36f | 14 | #include <linux/refcount.h> |
1da177e4 | 15 | |
d94d9fee | 16 | struct ipv4_devconf { |
1da177e4 | 17 | void *sysctl; |
ca7479eb TG |
18 | int data[IPV4_DEVCONF_MAX]; |
19 | DECLARE_BITMAP(state, IPV4_DEVCONF_MAX); | |
1da177e4 LT |
20 | }; |
21 | ||
e9897071 ED |
22 | #define MC_HASH_SZ_LOG 9 |
23 | ||
d94d9fee | 24 | struct in_device { |
1da177e4 | 25 | struct net_device *dev; |
7658b36f | 26 | refcount_t refcnt; |
1da177e4 LT |
27 | int dead; |
28 | struct in_ifaddr *ifa_list; /* IP ifaddr chain */ | |
e9897071 | 29 | |
1d7138de | 30 | struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */ |
e9897071 ED |
31 | struct ip_mc_list __rcu * __rcu *mc_hash; |
32 | ||
1d7138de | 33 | int mc_count; /* Number of installed mcasts */ |
1da177e4 LT |
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 | ||
02291680 | 50 | #define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1]) |
586f1211 PE |
51 | #define IPV4_DEVCONF_ALL(net, attr) \ |
52 | IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr) | |
42f811b8 HX |
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--; | |
31be3085 | 64 | set_bit(index, in_dev->cnf.state); |
42f811b8 HX |
65 | in_dev->cnf.data[index] = val; |
66 | } | |
67 | ||
71e27da9 HX |
68 | static inline void ipv4_devconf_setall(struct in_device *in_dev) |
69 | { | |
ca7479eb | 70 | bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX); |
71e27da9 HX |
71 | } |
72 | ||
42f811b8 | 73 | #define IN_DEV_CONF_GET(in_dev, attr) \ |
02291680 | 74 | ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr) |
42f811b8 | 75 | #define IN_DEV_CONF_SET(in_dev, attr, val) \ |
02291680 | 76 | ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val)) |
42f811b8 HX |
77 | |
78 | #define IN_DEV_ANDCONF(in_dev, attr) \ | |
c346dca1 | 79 | (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \ |
586f1211 | 80 | IN_DEV_CONF_GET((in_dev), attr)) |
9eb43e76 ED |
81 | |
82 | #define IN_DEV_NET_ORCONF(in_dev, net, attr) \ | |
83 | (IPV4_DEVCONF_ALL(net, attr) || \ | |
586f1211 | 84 | IN_DEV_CONF_GET((in_dev), attr)) |
9eb43e76 ED |
85 | |
86 | #define IN_DEV_ORCONF(in_dev, attr) \ | |
87 | IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr) | |
88 | ||
42f811b8 | 89 | #define IN_DEV_MAXCONF(in_dev, attr) \ |
c346dca1 | 90 | (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \ |
586f1211 | 91 | IN_DEV_CONF_GET((in_dev), attr))) |
42f811b8 HX |
92 | |
93 | #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING) | |
01ecfe9b | 94 | #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING) |
27fed417 | 95 | #define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER) |
28f6aeea | 96 | #define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK) |
42f811b8 HX |
97 | #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \ |
98 | ACCEPT_SOURCE_ROUTE) | |
8153a10c | 99 | #define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL) |
42f811b8 HX |
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) | |
65324144 | 104 | #define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN) |
42f811b8 HX |
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) | |
d0daebc3 | 114 | #define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET) |
9eb43e76 ED |
115 | #define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \ |
116 | IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET) | |
1da177e4 LT |
117 | |
118 | #define IN_DEV_RX_REDIRECTS(in_dev) \ | |
119 | ((IN_DEV_FORWARD(in_dev) && \ | |
42f811b8 | 120 | IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \ |
1da177e4 | 121 | || (!IN_DEV_FORWARD(in_dev) && \ |
42f811b8 | 122 | IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS))) |
1da177e4 | 123 | |
0eeb075f AG |
124 | #define IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) \ |
125 | IN_DEV_CONF_GET((in_dev), IGNORE_ROUTES_WITH_LINKDOWN) | |
126 | ||
42f811b8 | 127 | #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER) |
124d37e9 | 128 | #define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT) |
42f811b8 HX |
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) | |
eefef1cf | 131 | #define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY) |
1da177e4 | 132 | |
d94d9fee | 133 | struct in_ifaddr { |
fd23c3b3 | 134 | struct hlist_node hash; |
1da177e4 LT |
135 | struct in_ifaddr *ifa_next; |
136 | struct in_device *ifa_dev; | |
137 | struct rcu_head rcu_head; | |
a144ea4b AV |
138 | __be32 ifa_local; |
139 | __be32 ifa_address; | |
140 | __be32 ifa_mask; | |
141 | __be32 ifa_broadcast; | |
1da177e4 | 142 | unsigned char ifa_scope; |
1da177e4 | 143 | unsigned char ifa_prefixlen; |
ad6c8135 | 144 | __u32 ifa_flags; |
1da177e4 | 145 | char ifa_label[IFNAMSIZ]; |
5c766d64 JP |
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 */ | |
1da177e4 LT |
152 | }; |
153 | ||
3ad7d246 KJ |
154 | struct in_validator_info { |
155 | __be32 ivi_addr; | |
156 | struct in_device *ivi_dev; | |
157 | }; | |
158 | ||
f629d208 JP |
159 | int register_inetaddr_notifier(struct notifier_block *nb); |
160 | int unregister_inetaddr_notifier(struct notifier_block *nb); | |
3ad7d246 KJ |
161 | int register_inetaddr_validator_notifier(struct notifier_block *nb); |
162 | int unregister_inetaddr_validator_notifier(struct notifier_block *nb); | |
1da177e4 | 163 | |
3b022865 DA |
164 | void inet_netconf_notify_devconf(struct net *net, int event, int type, |
165 | int ifindex, struct ipv4_devconf *devconf); | |
d67b8c61 | 166 | |
f629d208 | 167 | struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref); |
82efee14 ED |
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 | ||
f629d208 JP |
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); | |
b601fa19 ND |
178 | __be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, __be32 dst, |
179 | __be32 local, int scope); | |
f629d208 JP |
180 | struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, |
181 | __be32 mask); | |
c3225164 | 182 | static __inline__ bool inet_ifa_match(__be32 addr, struct in_ifaddr *ifa) |
1da177e4 LT |
183 | { |
184 | return !((addr^ifa->ifa_address)&ifa->ifa_mask); | |
185 | } | |
186 | ||
187 | /* | |
188 | * Check if a mask is acceptable. | |
189 | */ | |
190 | ||
f06cc7b2 | 191 | static __inline__ bool bad_mask(__be32 mask, __be32 addr) |
1da177e4 | 192 | { |
714e85be | 193 | __u32 hmask; |
1da177e4 | 194 | if (addr & (mask = ~mask)) |
f06cc7b2 | 195 | return true; |
714e85be AV |
196 | hmask = ntohl(mask); |
197 | if (hmask & (hmask+1)) | |
f06cc7b2 YB |
198 | return true; |
199 | return false; | |
1da177e4 LT |
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 | ||
e5ed6399 HX |
211 | static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev) |
212 | { | |
95ae6b22 | 213 | return rcu_dereference(dev->ip_ptr); |
e5ed6399 HX |
214 | } |
215 | ||
95ae6b22 | 216 | static inline struct in_device *in_dev_get(const struct net_device *dev) |
1da177e4 LT |
217 | { |
218 | struct in_device *in_dev; | |
219 | ||
220 | rcu_read_lock(); | |
e5ed6399 | 221 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 | 222 | if (in_dev) |
7658b36f | 223 | refcount_inc(&in_dev->refcnt); |
1da177e4 LT |
224 | rcu_read_unlock(); |
225 | return in_dev; | |
226 | } | |
227 | ||
95ae6b22 | 228 | static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev) |
1da177e4 | 229 | { |
06a9701f | 230 | return rtnl_dereference(dev->ip_ptr); |
1da177e4 LT |
231 | } |
232 | ||
1d4c8c29 JP |
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 | ||
f629d208 | 240 | void in_dev_finish_destroy(struct in_device *idev); |
1da177e4 LT |
241 | |
242 | static inline void in_dev_put(struct in_device *idev) | |
243 | { | |
7658b36f | 244 | if (refcount_dec_and_test(&idev->refcnt)) |
1da177e4 LT |
245 | in_dev_finish_destroy(idev); |
246 | } | |
247 | ||
7658b36f RE |
248 | #define __in_dev_put(idev) refcount_dec(&(idev)->refcnt) |
249 | #define in_dev_hold(idev) refcount_inc(&(idev)->refcnt) | |
1da177e4 LT |
250 | |
251 | #endif /* __KERNEL__ */ | |
252 | ||
60cad5da | 253 | static __inline__ __be32 inet_make_mask(int logmask) |
1da177e4 LT |
254 | { |
255 | if (logmask) | |
84bc8868 | 256 | return htonl(~((1U<<(32-logmask))-1)); |
1da177e4 LT |
257 | return 0; |
258 | } | |
259 | ||
714e85be | 260 | static __inline__ int inet_mask_len(__be32 mask) |
1da177e4 | 261 | { |
714e85be AV |
262 | __u32 hmask = ntohl(mask); |
263 | if (!hmask) | |
1da177e4 | 264 | return 0; |
714e85be | 265 | return 32 - ffz(~hmask); |
1da177e4 LT |
266 | } |
267 | ||
268 | ||
269 | #endif /* _LINUX_INETDEVICE_H */ |