Commit | Line | Data |
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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> |
1da177e4 | 12 | |
02291680 EB |
13 | enum |
14 | { | |
15 | IPV4_DEVCONF_FORWARDING=1, | |
16 | IPV4_DEVCONF_MC_FORWARDING, | |
17 | IPV4_DEVCONF_PROXY_ARP, | |
18 | IPV4_DEVCONF_ACCEPT_REDIRECTS, | |
19 | IPV4_DEVCONF_SECURE_REDIRECTS, | |
20 | IPV4_DEVCONF_SEND_REDIRECTS, | |
21 | IPV4_DEVCONF_SHARED_MEDIA, | |
22 | IPV4_DEVCONF_RP_FILTER, | |
23 | IPV4_DEVCONF_ACCEPT_SOURCE_ROUTE, | |
24 | IPV4_DEVCONF_BOOTP_RELAY, | |
25 | IPV4_DEVCONF_LOG_MARTIANS, | |
26 | IPV4_DEVCONF_TAG, | |
27 | IPV4_DEVCONF_ARPFILTER, | |
28 | IPV4_DEVCONF_MEDIUM_ID, | |
29 | IPV4_DEVCONF_NOXFRM, | |
30 | IPV4_DEVCONF_NOPOLICY, | |
31 | IPV4_DEVCONF_FORCE_IGMP_VERSION, | |
32 | IPV4_DEVCONF_ARP_ANNOUNCE, | |
33 | IPV4_DEVCONF_ARP_IGNORE, | |
34 | IPV4_DEVCONF_PROMOTE_SECONDARIES, | |
35 | IPV4_DEVCONF_ARP_ACCEPT, | |
36 | IPV4_DEVCONF_ARP_NOTIFY, | |
37 | IPV4_DEVCONF_ACCEPT_LOCAL, | |
38 | IPV4_DEVCONF_SRC_VMARK, | |
39 | IPV4_DEVCONF_PROXY_ARP_PVLAN, | |
40 | __IPV4_DEVCONF_MAX | |
41 | }; | |
42 | ||
d94d9fee | 43 | struct ipv4_devconf { |
1da177e4 | 44 | void *sysctl; |
02291680 EB |
45 | int data[__IPV4_DEVCONF_MAX - 1]; |
46 | DECLARE_BITMAP(state, __IPV4_DEVCONF_MAX - 1); | |
1da177e4 LT |
47 | }; |
48 | ||
d94d9fee | 49 | struct in_device { |
1da177e4 LT |
50 | struct net_device *dev; |
51 | atomic_t refcnt; | |
52 | int dead; | |
53 | struct in_ifaddr *ifa_list; /* IP ifaddr chain */ | |
54 | rwlock_t mc_list_lock; | |
55 | struct ip_mc_list *mc_list; /* IP multicast filter chain */ | |
b8bae41e | 56 | int mc_count; /* Number of installed mcasts */ |
1da177e4 LT |
57 | spinlock_t mc_tomb_lock; |
58 | struct ip_mc_list *mc_tomb; | |
59 | unsigned long mr_v1_seen; | |
60 | unsigned long mr_v2_seen; | |
61 | unsigned long mr_maxdelay; | |
62 | unsigned char mr_qrv; | |
63 | unsigned char mr_gq_running; | |
64 | unsigned char mr_ifc_count; | |
65 | struct timer_list mr_gq_timer; /* general query timer */ | |
66 | struct timer_list mr_ifc_timer; /* interface change timer */ | |
67 | ||
68 | struct neigh_parms *arp_parms; | |
69 | struct ipv4_devconf cnf; | |
70 | struct rcu_head rcu_head; | |
71 | }; | |
72 | ||
02291680 | 73 | #define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1]) |
586f1211 PE |
74 | #define IPV4_DEVCONF_ALL(net, attr) \ |
75 | IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr) | |
42f811b8 HX |
76 | |
77 | static inline int ipv4_devconf_get(struct in_device *in_dev, int index) | |
78 | { | |
79 | index--; | |
80 | return in_dev->cnf.data[index]; | |
81 | } | |
82 | ||
83 | static inline void ipv4_devconf_set(struct in_device *in_dev, int index, | |
84 | int val) | |
85 | { | |
86 | index--; | |
31be3085 | 87 | set_bit(index, in_dev->cnf.state); |
42f811b8 HX |
88 | in_dev->cnf.data[index] = val; |
89 | } | |
90 | ||
71e27da9 HX |
91 | static inline void ipv4_devconf_setall(struct in_device *in_dev) |
92 | { | |
02291680 | 93 | bitmap_fill(in_dev->cnf.state, __IPV4_DEVCONF_MAX - 1); |
71e27da9 HX |
94 | } |
95 | ||
42f811b8 | 96 | #define IN_DEV_CONF_GET(in_dev, attr) \ |
02291680 | 97 | ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr) |
42f811b8 | 98 | #define IN_DEV_CONF_SET(in_dev, attr, val) \ |
02291680 | 99 | ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val)) |
42f811b8 HX |
100 | |
101 | #define IN_DEV_ANDCONF(in_dev, attr) \ | |
c346dca1 | 102 | (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \ |
586f1211 | 103 | IN_DEV_CONF_GET((in_dev), attr)) |
42f811b8 | 104 | #define IN_DEV_ORCONF(in_dev, attr) \ |
c346dca1 | 105 | (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) || \ |
586f1211 | 106 | IN_DEV_CONF_GET((in_dev), attr)) |
42f811b8 | 107 | #define IN_DEV_MAXCONF(in_dev, attr) \ |
c346dca1 | 108 | (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \ |
586f1211 | 109 | IN_DEV_CONF_GET((in_dev), attr))) |
42f811b8 HX |
110 | |
111 | #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING) | |
01ecfe9b | 112 | #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING) |
27fed417 | 113 | #define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER) |
28f6aeea | 114 | #define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK) |
42f811b8 HX |
115 | #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \ |
116 | ACCEPT_SOURCE_ROUTE) | |
8153a10c | 117 | #define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL) |
42f811b8 HX |
118 | #define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY) |
119 | ||
120 | #define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS) | |
121 | #define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP) | |
65324144 | 122 | #define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN) |
42f811b8 HX |
123 | #define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA) |
124 | #define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS) | |
125 | #define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \ | |
126 | SECURE_REDIRECTS) | |
127 | #define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG) | |
128 | #define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID) | |
129 | #define IN_DEV_PROMOTE_SECONDARIES(in_dev) \ | |
130 | IN_DEV_ORCONF((in_dev), \ | |
131 | PROMOTE_SECONDARIES) | |
1da177e4 LT |
132 | |
133 | #define IN_DEV_RX_REDIRECTS(in_dev) \ | |
134 | ((IN_DEV_FORWARD(in_dev) && \ | |
42f811b8 | 135 | IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \ |
1da177e4 | 136 | || (!IN_DEV_FORWARD(in_dev) && \ |
42f811b8 | 137 | IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS))) |
1da177e4 | 138 | |
42f811b8 HX |
139 | #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER) |
140 | #define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE) | |
141 | #define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE) | |
eefef1cf | 142 | #define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY) |
1da177e4 | 143 | |
d94d9fee | 144 | struct in_ifaddr { |
1da177e4 LT |
145 | struct in_ifaddr *ifa_next; |
146 | struct in_device *ifa_dev; | |
147 | struct rcu_head rcu_head; | |
a144ea4b AV |
148 | __be32 ifa_local; |
149 | __be32 ifa_address; | |
150 | __be32 ifa_mask; | |
151 | __be32 ifa_broadcast; | |
1da177e4 LT |
152 | unsigned char ifa_scope; |
153 | unsigned char ifa_flags; | |
154 | unsigned char ifa_prefixlen; | |
155 | char ifa_label[IFNAMSIZ]; | |
156 | }; | |
157 | ||
158 | extern int register_inetaddr_notifier(struct notifier_block *nb); | |
159 | extern int unregister_inetaddr_notifier(struct notifier_block *nb); | |
160 | ||
1ab35276 | 161 | extern struct net_device *ip_dev_find(struct net *net, __be32 addr); |
ff428d72 | 162 | extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b); |
e5b13cb1 | 163 | extern int devinet_ioctl(struct net *net, unsigned int cmd, void __user *); |
1da177e4 | 164 | extern void devinet_init(void); |
7fee0ca2 | 165 | extern struct in_device *inetdev_by_index(struct net *, int); |
a61ced5d | 166 | extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope); |
9bd85e32 | 167 | extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope); |
60cad5da | 168 | extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask); |
1da177e4 | 169 | |
60cad5da | 170 | static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa) |
1da177e4 LT |
171 | { |
172 | return !((addr^ifa->ifa_address)&ifa->ifa_mask); | |
173 | } | |
174 | ||
175 | /* | |
176 | * Check if a mask is acceptable. | |
177 | */ | |
178 | ||
714e85be | 179 | static __inline__ int bad_mask(__be32 mask, __be32 addr) |
1da177e4 | 180 | { |
714e85be | 181 | __u32 hmask; |
1da177e4 LT |
182 | if (addr & (mask = ~mask)) |
183 | return 1; | |
714e85be AV |
184 | hmask = ntohl(mask); |
185 | if (hmask & (hmask+1)) | |
1da177e4 LT |
186 | return 1; |
187 | return 0; | |
188 | } | |
189 | ||
190 | #define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \ | |
191 | for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next) | |
192 | ||
193 | #define for_ifa(in_dev) { struct in_ifaddr *ifa; \ | |
194 | for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next) | |
195 | ||
196 | ||
197 | #define endfor_ifa(in_dev) } | |
198 | ||
e5ed6399 HX |
199 | static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev) |
200 | { | |
201 | struct in_device *in_dev = dev->ip_ptr; | |
202 | if (in_dev) | |
203 | in_dev = rcu_dereference(in_dev); | |
204 | return in_dev; | |
205 | } | |
206 | ||
1da177e4 LT |
207 | static __inline__ struct in_device * |
208 | in_dev_get(const struct net_device *dev) | |
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 | ||
220 | static __inline__ struct in_device * | |
e5ed6399 | 221 | __in_dev_get_rtnl(const struct net_device *dev) |
1da177e4 LT |
222 | { |
223 | return (struct in_device*)dev->ip_ptr; | |
224 | } | |
225 | ||
226 | extern void in_dev_finish_destroy(struct in_device *idev); | |
227 | ||
228 | static inline void in_dev_put(struct in_device *idev) | |
229 | { | |
230 | if (atomic_dec_and_test(&idev->refcnt)) | |
231 | in_dev_finish_destroy(idev); | |
232 | } | |
233 | ||
234 | #define __in_dev_put(idev) atomic_dec(&(idev)->refcnt) | |
235 | #define in_dev_hold(idev) atomic_inc(&(idev)->refcnt) | |
236 | ||
237 | #endif /* __KERNEL__ */ | |
238 | ||
60cad5da | 239 | static __inline__ __be32 inet_make_mask(int logmask) |
1da177e4 LT |
240 | { |
241 | if (logmask) | |
242 | return htonl(~((1<<(32-logmask))-1)); | |
243 | return 0; | |
244 | } | |
245 | ||
714e85be | 246 | static __inline__ int inet_mask_len(__be32 mask) |
1da177e4 | 247 | { |
714e85be AV |
248 | __u32 hmask = ntohl(mask); |
249 | if (!hmask) | |
1da177e4 | 250 | return 0; |
714e85be | 251 | return 32 - ffz(~hmask); |
1da177e4 LT |
252 | } |
253 | ||
254 | ||
255 | #endif /* _LINUX_INETDEVICE_H */ |