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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> |
1da177e4 | 14 | |
d94d9fee | 15 | struct ipv4_devconf { |
1da177e4 | 16 | void *sysctl; |
ca7479eb TG |
17 | int data[IPV4_DEVCONF_MAX]; |
18 | DECLARE_BITMAP(state, IPV4_DEVCONF_MAX); | |
1da177e4 LT |
19 | }; |
20 | ||
e9897071 ED |
21 | #define MC_HASH_SZ_LOG 9 |
22 | ||
d94d9fee | 23 | struct in_device { |
1da177e4 LT |
24 | struct net_device *dev; |
25 | atomic_t refcnt; | |
26 | int dead; | |
27 | struct in_ifaddr *ifa_list; /* IP ifaddr chain */ | |
e9897071 | 28 | |
1d7138de | 29 | struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */ |
e9897071 ED |
30 | struct ip_mc_list __rcu * __rcu *mc_hash; |
31 | ||
1d7138de | 32 | int mc_count; /* Number of installed mcasts */ |
1da177e4 LT |
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 | ||
02291680 | 49 | #define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1]) |
586f1211 PE |
50 | #define IPV4_DEVCONF_ALL(net, attr) \ |
51 | IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr) | |
42f811b8 HX |
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--; | |
31be3085 | 63 | set_bit(index, in_dev->cnf.state); |
42f811b8 HX |
64 | in_dev->cnf.data[index] = val; |
65 | } | |
66 | ||
71e27da9 HX |
67 | static inline void ipv4_devconf_setall(struct in_device *in_dev) |
68 | { | |
ca7479eb | 69 | bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX); |
71e27da9 HX |
70 | } |
71 | ||
42f811b8 | 72 | #define IN_DEV_CONF_GET(in_dev, attr) \ |
02291680 | 73 | ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr) |
42f811b8 | 74 | #define IN_DEV_CONF_SET(in_dev, attr, val) \ |
02291680 | 75 | ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val)) |
42f811b8 HX |
76 | |
77 | #define IN_DEV_ANDCONF(in_dev, attr) \ | |
c346dca1 | 78 | (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \ |
586f1211 | 79 | IN_DEV_CONF_GET((in_dev), attr)) |
9eb43e76 ED |
80 | |
81 | #define IN_DEV_NET_ORCONF(in_dev, net, attr) \ | |
82 | (IPV4_DEVCONF_ALL(net, attr) || \ | |
586f1211 | 83 | IN_DEV_CONF_GET((in_dev), attr)) |
9eb43e76 ED |
84 | |
85 | #define IN_DEV_ORCONF(in_dev, attr) \ | |
86 | IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr) | |
87 | ||
42f811b8 | 88 | #define IN_DEV_MAXCONF(in_dev, attr) \ |
c346dca1 | 89 | (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \ |
586f1211 | 90 | IN_DEV_CONF_GET((in_dev), attr))) |
42f811b8 HX |
91 | |
92 | #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING) | |
01ecfe9b | 93 | #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING) |
27fed417 | 94 | #define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER) |
28f6aeea | 95 | #define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK) |
42f811b8 HX |
96 | #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \ |
97 | ACCEPT_SOURCE_ROUTE) | |
8153a10c | 98 | #define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL) |
42f811b8 HX |
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) | |
65324144 | 103 | #define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN) |
42f811b8 HX |
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) | |
d0daebc3 | 113 | #define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET) |
9eb43e76 ED |
114 | #define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \ |
115 | IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET) | |
1da177e4 LT |
116 | |
117 | #define IN_DEV_RX_REDIRECTS(in_dev) \ | |
118 | ((IN_DEV_FORWARD(in_dev) && \ | |
42f811b8 | 119 | IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \ |
1da177e4 | 120 | || (!IN_DEV_FORWARD(in_dev) && \ |
42f811b8 | 121 | IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS))) |
1da177e4 | 122 | |
0eeb075f AG |
123 | #define IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) \ |
124 | IN_DEV_CONF_GET((in_dev), IGNORE_ROUTES_WITH_LINKDOWN) | |
125 | ||
42f811b8 | 126 | #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER) |
124d37e9 | 127 | #define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT) |
42f811b8 HX |
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) | |
eefef1cf | 130 | #define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY) |
1da177e4 | 131 | |
d94d9fee | 132 | struct in_ifaddr { |
fd23c3b3 | 133 | struct hlist_node hash; |
1da177e4 LT |
134 | struct in_ifaddr *ifa_next; |
135 | struct in_device *ifa_dev; | |
136 | struct rcu_head rcu_head; | |
a144ea4b AV |
137 | __be32 ifa_local; |
138 | __be32 ifa_address; | |
139 | __be32 ifa_mask; | |
140 | __be32 ifa_broadcast; | |
1da177e4 | 141 | unsigned char ifa_scope; |
1da177e4 | 142 | unsigned char ifa_prefixlen; |
ad6c8135 | 143 | __u32 ifa_flags; |
1da177e4 | 144 | char ifa_label[IFNAMSIZ]; |
5c766d64 JP |
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 */ | |
1da177e4 LT |
151 | }; |
152 | ||
f629d208 JP |
153 | int register_inetaddr_notifier(struct notifier_block *nb); |
154 | int unregister_inetaddr_notifier(struct notifier_block *nb); | |
1da177e4 | 155 | |
f629d208 JP |
156 | void inet_netconf_notify_devconf(struct net *net, int type, int ifindex, |
157 | struct ipv4_devconf *devconf); | |
d67b8c61 | 158 | |
f629d208 | 159 | struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref); |
82efee14 ED |
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 | ||
f629d208 JP |
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); | |
b601fa19 ND |
170 | __be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, __be32 dst, |
171 | __be32 local, int scope); | |
f629d208 JP |
172 | struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, |
173 | __be32 mask); | |
c3225164 | 174 | static __inline__ bool inet_ifa_match(__be32 addr, struct in_ifaddr *ifa) |
1da177e4 LT |
175 | { |
176 | return !((addr^ifa->ifa_address)&ifa->ifa_mask); | |
177 | } | |
178 | ||
179 | /* | |
180 | * Check if a mask is acceptable. | |
181 | */ | |
182 | ||
f06cc7b2 | 183 | static __inline__ bool bad_mask(__be32 mask, __be32 addr) |
1da177e4 | 184 | { |
714e85be | 185 | __u32 hmask; |
1da177e4 | 186 | if (addr & (mask = ~mask)) |
f06cc7b2 | 187 | return true; |
714e85be AV |
188 | hmask = ntohl(mask); |
189 | if (hmask & (hmask+1)) | |
f06cc7b2 YB |
190 | return true; |
191 | return false; | |
1da177e4 LT |
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 | ||
e5ed6399 HX |
203 | static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev) |
204 | { | |
95ae6b22 | 205 | return rcu_dereference(dev->ip_ptr); |
e5ed6399 HX |
206 | } |
207 | ||
95ae6b22 | 208 | static inline struct in_device *in_dev_get(const struct net_device *dev) |
1da177e4 LT |
209 | { |
210 | struct in_device *in_dev; | |
211 | ||
212 | rcu_read_lock(); | |
e5ed6399 | 213 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 LT |
214 | if (in_dev) |
215 | atomic_inc(&in_dev->refcnt); | |
216 | rcu_read_unlock(); | |
217 | return in_dev; | |
218 | } | |
219 | ||
95ae6b22 | 220 | static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev) |
1da177e4 | 221 | { |
06a9701f | 222 | return rtnl_dereference(dev->ip_ptr); |
1da177e4 LT |
223 | } |
224 | ||
1d4c8c29 JP |
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 | ||
f629d208 | 232 | void in_dev_finish_destroy(struct in_device *idev); |
1da177e4 LT |
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 | ||
60cad5da | 245 | static __inline__ __be32 inet_make_mask(int logmask) |
1da177e4 LT |
246 | { |
247 | if (logmask) | |
84bc8868 | 248 | return htonl(~((1U<<(32-logmask))-1)); |
1da177e4 LT |
249 | return 0; |
250 | } | |
251 | ||
714e85be | 252 | static __inline__ int inet_mask_len(__be32 mask) |
1da177e4 | 253 | { |
714e85be AV |
254 | __u32 hmask = ntohl(mask); |
255 | if (!hmask) | |
1da177e4 | 256 | return 0; |
714e85be | 257 | return 32 - ffz(~hmask); |
1da177e4 LT |
258 | } |
259 | ||
260 | ||
261 | #endif /* _LINUX_INETDEVICE_H */ |