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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 LT |
7 | #include <linux/if.h> |
8 | #include <linux/netdevice.h> | |
9 | #include <linux/rcupdate.h> | |
10 | #include <linux/timer.h> | |
8bfe6d68 | 11 | #include <linux/sysctl.h> |
95ae6b22 | 12 | #include <linux/rtnetlink.h> |
1da177e4 | 13 | |
02291680 EB |
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, | |
d0daebc3 | 41 | IPV4_DEVCONF_ROUTE_LOCALNET, |
02291680 EB |
42 | __IPV4_DEVCONF_MAX |
43 | }; | |
44 | ||
ca7479eb TG |
45 | #define IPV4_DEVCONF_MAX (__IPV4_DEVCONF_MAX - 1) |
46 | ||
d94d9fee | 47 | struct ipv4_devconf { |
1da177e4 | 48 | void *sysctl; |
ca7479eb TG |
49 | int data[IPV4_DEVCONF_MAX]; |
50 | DECLARE_BITMAP(state, IPV4_DEVCONF_MAX); | |
1da177e4 LT |
51 | }; |
52 | ||
e9897071 ED |
53 | #define MC_HASH_SZ_LOG 9 |
54 | ||
d94d9fee | 55 | struct in_device { |
1da177e4 LT |
56 | struct net_device *dev; |
57 | atomic_t refcnt; | |
58 | int dead; | |
59 | struct in_ifaddr *ifa_list; /* IP ifaddr chain */ | |
e9897071 | 60 | |
1d7138de | 61 | struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */ |
e9897071 ED |
62 | struct ip_mc_list __rcu * __rcu *mc_hash; |
63 | ||
1d7138de | 64 | int mc_count; /* Number of installed mcasts */ |
1da177e4 LT |
65 | spinlock_t mc_tomb_lock; |
66 | struct ip_mc_list *mc_tomb; | |
67 | unsigned long mr_v1_seen; | |
68 | unsigned long mr_v2_seen; | |
69 | unsigned long mr_maxdelay; | |
70 | unsigned char mr_qrv; | |
71 | unsigned char mr_gq_running; | |
72 | unsigned char mr_ifc_count; | |
73 | struct timer_list mr_gq_timer; /* general query timer */ | |
74 | struct timer_list mr_ifc_timer; /* interface change timer */ | |
75 | ||
76 | struct neigh_parms *arp_parms; | |
77 | struct ipv4_devconf cnf; | |
78 | struct rcu_head rcu_head; | |
79 | }; | |
80 | ||
02291680 | 81 | #define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1]) |
586f1211 PE |
82 | #define IPV4_DEVCONF_ALL(net, attr) \ |
83 | IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr) | |
42f811b8 HX |
84 | |
85 | static inline int ipv4_devconf_get(struct in_device *in_dev, int index) | |
86 | { | |
87 | index--; | |
88 | return in_dev->cnf.data[index]; | |
89 | } | |
90 | ||
91 | static inline void ipv4_devconf_set(struct in_device *in_dev, int index, | |
92 | int val) | |
93 | { | |
94 | index--; | |
31be3085 | 95 | set_bit(index, in_dev->cnf.state); |
42f811b8 HX |
96 | in_dev->cnf.data[index] = val; |
97 | } | |
98 | ||
71e27da9 HX |
99 | static inline void ipv4_devconf_setall(struct in_device *in_dev) |
100 | { | |
ca7479eb | 101 | bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX); |
71e27da9 HX |
102 | } |
103 | ||
42f811b8 | 104 | #define IN_DEV_CONF_GET(in_dev, attr) \ |
02291680 | 105 | ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr) |
42f811b8 | 106 | #define IN_DEV_CONF_SET(in_dev, attr, val) \ |
02291680 | 107 | ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val)) |
42f811b8 HX |
108 | |
109 | #define IN_DEV_ANDCONF(in_dev, attr) \ | |
c346dca1 | 110 | (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \ |
586f1211 | 111 | IN_DEV_CONF_GET((in_dev), attr)) |
9eb43e76 ED |
112 | |
113 | #define IN_DEV_NET_ORCONF(in_dev, net, attr) \ | |
114 | (IPV4_DEVCONF_ALL(net, attr) || \ | |
586f1211 | 115 | IN_DEV_CONF_GET((in_dev), attr)) |
9eb43e76 ED |
116 | |
117 | #define IN_DEV_ORCONF(in_dev, attr) \ | |
118 | IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr) | |
119 | ||
42f811b8 | 120 | #define IN_DEV_MAXCONF(in_dev, attr) \ |
c346dca1 | 121 | (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \ |
586f1211 | 122 | IN_DEV_CONF_GET((in_dev), attr))) |
42f811b8 HX |
123 | |
124 | #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING) | |
01ecfe9b | 125 | #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING) |
27fed417 | 126 | #define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER) |
28f6aeea | 127 | #define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK) |
42f811b8 HX |
128 | #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \ |
129 | ACCEPT_SOURCE_ROUTE) | |
8153a10c | 130 | #define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL) |
42f811b8 HX |
131 | #define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY) |
132 | ||
133 | #define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS) | |
134 | #define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP) | |
65324144 | 135 | #define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN) |
42f811b8 HX |
136 | #define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA) |
137 | #define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS) | |
138 | #define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \ | |
139 | SECURE_REDIRECTS) | |
140 | #define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG) | |
141 | #define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID) | |
142 | #define IN_DEV_PROMOTE_SECONDARIES(in_dev) \ | |
143 | IN_DEV_ORCONF((in_dev), \ | |
144 | PROMOTE_SECONDARIES) | |
d0daebc3 | 145 | #define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET) |
9eb43e76 ED |
146 | #define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \ |
147 | IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET) | |
1da177e4 LT |
148 | |
149 | #define IN_DEV_RX_REDIRECTS(in_dev) \ | |
150 | ((IN_DEV_FORWARD(in_dev) && \ | |
42f811b8 | 151 | IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \ |
1da177e4 | 152 | || (!IN_DEV_FORWARD(in_dev) && \ |
42f811b8 | 153 | IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS))) |
1da177e4 | 154 | |
42f811b8 | 155 | #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER) |
124d37e9 | 156 | #define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT) |
42f811b8 HX |
157 | #define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE) |
158 | #define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE) | |
eefef1cf | 159 | #define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY) |
1da177e4 | 160 | |
d94d9fee | 161 | struct in_ifaddr { |
fd23c3b3 | 162 | struct hlist_node hash; |
1da177e4 LT |
163 | struct in_ifaddr *ifa_next; |
164 | struct in_device *ifa_dev; | |
165 | struct rcu_head rcu_head; | |
a144ea4b AV |
166 | __be32 ifa_local; |
167 | __be32 ifa_address; | |
168 | __be32 ifa_mask; | |
169 | __be32 ifa_broadcast; | |
1da177e4 LT |
170 | unsigned char ifa_scope; |
171 | unsigned char ifa_flags; | |
172 | unsigned char ifa_prefixlen; | |
173 | char ifa_label[IFNAMSIZ]; | |
5c766d64 JP |
174 | |
175 | /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */ | |
176 | __u32 ifa_valid_lft; | |
177 | __u32 ifa_preferred_lft; | |
178 | unsigned long ifa_cstamp; /* created timestamp */ | |
179 | unsigned long ifa_tstamp; /* updated timestamp */ | |
1da177e4 LT |
180 | }; |
181 | ||
182 | extern int register_inetaddr_notifier(struct notifier_block *nb); | |
183 | extern int unregister_inetaddr_notifier(struct notifier_block *nb); | |
184 | ||
d67b8c61 ND |
185 | extern void inet_netconf_notify_devconf(struct net *net, int type, int ifindex, |
186 | struct ipv4_devconf *devconf); | |
187 | ||
82efee14 ED |
188 | extern struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref); |
189 | static inline struct net_device *ip_dev_find(struct net *net, __be32 addr) | |
190 | { | |
191 | return __ip_dev_find(net, addr, true); | |
192 | } | |
193 | ||
ff428d72 | 194 | extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b); |
e5b13cb1 | 195 | extern int devinet_ioctl(struct net *net, unsigned int cmd, void __user *); |
1da177e4 | 196 | extern void devinet_init(void); |
7fee0ca2 | 197 | extern struct in_device *inetdev_by_index(struct net *, int); |
a61ced5d | 198 | extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope); |
9bd85e32 | 199 | extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope); |
60cad5da | 200 | extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask); |
1da177e4 | 201 | |
60cad5da | 202 | static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa) |
1da177e4 LT |
203 | { |
204 | return !((addr^ifa->ifa_address)&ifa->ifa_mask); | |
205 | } | |
206 | ||
207 | /* | |
208 | * Check if a mask is acceptable. | |
209 | */ | |
210 | ||
714e85be | 211 | static __inline__ int bad_mask(__be32 mask, __be32 addr) |
1da177e4 | 212 | { |
714e85be | 213 | __u32 hmask; |
1da177e4 LT |
214 | if (addr & (mask = ~mask)) |
215 | return 1; | |
714e85be AV |
216 | hmask = ntohl(mask); |
217 | if (hmask & (hmask+1)) | |
1da177e4 LT |
218 | return 1; |
219 | return 0; | |
220 | } | |
221 | ||
222 | #define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \ | |
223 | for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next) | |
224 | ||
225 | #define for_ifa(in_dev) { struct in_ifaddr *ifa; \ | |
226 | for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next) | |
227 | ||
228 | ||
229 | #define endfor_ifa(in_dev) } | |
230 | ||
e5ed6399 HX |
231 | static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev) |
232 | { | |
95ae6b22 | 233 | return rcu_dereference(dev->ip_ptr); |
e5ed6399 HX |
234 | } |
235 | ||
95ae6b22 | 236 | static inline struct in_device *in_dev_get(const struct net_device *dev) |
1da177e4 LT |
237 | { |
238 | struct in_device *in_dev; | |
239 | ||
240 | rcu_read_lock(); | |
e5ed6399 | 241 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 LT |
242 | if (in_dev) |
243 | atomic_inc(&in_dev->refcnt); | |
244 | rcu_read_unlock(); | |
245 | return in_dev; | |
246 | } | |
247 | ||
95ae6b22 | 248 | static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev) |
1da177e4 | 249 | { |
06a9701f | 250 | return rtnl_dereference(dev->ip_ptr); |
1da177e4 LT |
251 | } |
252 | ||
253 | extern void in_dev_finish_destroy(struct in_device *idev); | |
254 | ||
255 | static inline void in_dev_put(struct in_device *idev) | |
256 | { | |
257 | if (atomic_dec_and_test(&idev->refcnt)) | |
258 | in_dev_finish_destroy(idev); | |
259 | } | |
260 | ||
261 | #define __in_dev_put(idev) atomic_dec(&(idev)->refcnt) | |
262 | #define in_dev_hold(idev) atomic_inc(&(idev)->refcnt) | |
263 | ||
264 | #endif /* __KERNEL__ */ | |
265 | ||
60cad5da | 266 | static __inline__ __be32 inet_make_mask(int logmask) |
1da177e4 LT |
267 | { |
268 | if (logmask) | |
269 | return htonl(~((1<<(32-logmask))-1)); | |
270 | return 0; | |
271 | } | |
272 | ||
714e85be | 273 | static __inline__ int inet_mask_len(__be32 mask) |
1da177e4 | 274 | { |
714e85be AV |
275 | __u32 hmask = ntohl(mask); |
276 | if (!hmask) | |
1da177e4 | 277 | return 0; |
714e85be | 278 | return 32 - ffz(~hmask); |
1da177e4 LT |
279 | } |
280 | ||
281 | ||
282 | #endif /* _LINUX_INETDEVICE_H */ |