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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 LT |
12 | |
13 | struct ipv4_devconf | |
14 | { | |
1da177e4 | 15 | void *sysctl; |
42f811b8 | 16 | int data[__NET_IPV4_CONF_MAX - 1]; |
31be3085 | 17 | DECLARE_BITMAP(state, __NET_IPV4_CONF_MAX - 1); |
1da177e4 LT |
18 | }; |
19 | ||
20 | extern struct ipv4_devconf ipv4_devconf; | |
21 | ||
22 | struct in_device | |
23 | { | |
24 | struct net_device *dev; | |
25 | atomic_t refcnt; | |
26 | int dead; | |
27 | struct in_ifaddr *ifa_list; /* IP ifaddr chain */ | |
28 | rwlock_t mc_list_lock; | |
29 | struct ip_mc_list *mc_list; /* IP multicast filter chain */ | |
30 | spinlock_t mc_tomb_lock; | |
31 | struct ip_mc_list *mc_tomb; | |
32 | unsigned long mr_v1_seen; | |
33 | unsigned long mr_v2_seen; | |
34 | unsigned long mr_maxdelay; | |
35 | unsigned char mr_qrv; | |
36 | unsigned char mr_gq_running; | |
37 | unsigned char mr_ifc_count; | |
38 | struct timer_list mr_gq_timer; /* general query timer */ | |
39 | struct timer_list mr_ifc_timer; /* interface change timer */ | |
40 | ||
41 | struct neigh_parms *arp_parms; | |
42 | struct ipv4_devconf cnf; | |
43 | struct rcu_head rcu_head; | |
44 | }; | |
45 | ||
42f811b8 | 46 | #define IPV4_DEVCONF(cnf, attr) ((cnf).data[NET_IPV4_CONF_ ## attr - 1]) |
586f1211 PE |
47 | #define IPV4_DEVCONF_ALL(net, attr) \ |
48 | IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr) | |
42f811b8 HX |
49 | |
50 | static inline int ipv4_devconf_get(struct in_device *in_dev, int index) | |
51 | { | |
52 | index--; | |
53 | return in_dev->cnf.data[index]; | |
54 | } | |
55 | ||
56 | static inline void ipv4_devconf_set(struct in_device *in_dev, int index, | |
57 | int val) | |
58 | { | |
59 | index--; | |
31be3085 | 60 | set_bit(index, in_dev->cnf.state); |
42f811b8 HX |
61 | in_dev->cnf.data[index] = val; |
62 | } | |
63 | ||
71e27da9 HX |
64 | static inline void ipv4_devconf_setall(struct in_device *in_dev) |
65 | { | |
66 | bitmap_fill(in_dev->cnf.state, __NET_IPV4_CONF_MAX - 1); | |
67 | } | |
68 | ||
42f811b8 HX |
69 | #define IN_DEV_CONF_GET(in_dev, attr) \ |
70 | ipv4_devconf_get((in_dev), NET_IPV4_CONF_ ## attr) | |
71 | #define IN_DEV_CONF_SET(in_dev, attr, val) \ | |
72 | ipv4_devconf_set((in_dev), NET_IPV4_CONF_ ## attr, (val)) | |
73 | ||
74 | #define IN_DEV_ANDCONF(in_dev, attr) \ | |
586f1211 PE |
75 | (IPV4_DEVCONF_ALL(in_dev->dev->nd_net, attr) && \ |
76 | IN_DEV_CONF_GET((in_dev), attr)) | |
42f811b8 | 77 | #define IN_DEV_ORCONF(in_dev, attr) \ |
586f1211 PE |
78 | (IPV4_DEVCONF_ALL(in_dev->dev->nd_net, attr) || \ |
79 | IN_DEV_CONF_GET((in_dev), attr)) | |
42f811b8 | 80 | #define IN_DEV_MAXCONF(in_dev, attr) \ |
586f1211 PE |
81 | (max(IPV4_DEVCONF_ALL(in_dev->dev->nd_net, attr), \ |
82 | IN_DEV_CONF_GET((in_dev), attr))) | |
42f811b8 HX |
83 | |
84 | #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING) | |
01ecfe9b | 85 | #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING) |
42f811b8 HX |
86 | #define IN_DEV_RPFILTER(in_dev) IN_DEV_ANDCONF((in_dev), RP_FILTER) |
87 | #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \ | |
88 | ACCEPT_SOURCE_ROUTE) | |
89 | #define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY) | |
90 | ||
91 | #define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS) | |
92 | #define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP) | |
93 | #define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA) | |
94 | #define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS) | |
95 | #define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \ | |
96 | SECURE_REDIRECTS) | |
97 | #define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG) | |
98 | #define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID) | |
99 | #define IN_DEV_PROMOTE_SECONDARIES(in_dev) \ | |
100 | IN_DEV_ORCONF((in_dev), \ | |
101 | PROMOTE_SECONDARIES) | |
1da177e4 LT |
102 | |
103 | #define IN_DEV_RX_REDIRECTS(in_dev) \ | |
104 | ((IN_DEV_FORWARD(in_dev) && \ | |
42f811b8 | 105 | IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \ |
1da177e4 | 106 | || (!IN_DEV_FORWARD(in_dev) && \ |
42f811b8 | 107 | IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS))) |
1da177e4 | 108 | |
42f811b8 HX |
109 | #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER) |
110 | #define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE) | |
111 | #define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE) | |
1da177e4 LT |
112 | |
113 | struct in_ifaddr | |
114 | { | |
115 | struct in_ifaddr *ifa_next; | |
116 | struct in_device *ifa_dev; | |
117 | struct rcu_head rcu_head; | |
a144ea4b AV |
118 | __be32 ifa_local; |
119 | __be32 ifa_address; | |
120 | __be32 ifa_mask; | |
121 | __be32 ifa_broadcast; | |
122 | __be32 ifa_anycast; | |
1da177e4 LT |
123 | unsigned char ifa_scope; |
124 | unsigned char ifa_flags; | |
125 | unsigned char ifa_prefixlen; | |
126 | char ifa_label[IFNAMSIZ]; | |
127 | }; | |
128 | ||
129 | extern int register_inetaddr_notifier(struct notifier_block *nb); | |
130 | extern int unregister_inetaddr_notifier(struct notifier_block *nb); | |
131 | ||
60cad5da | 132 | extern struct net_device *ip_dev_find(__be32 addr); |
ff428d72 | 133 | extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b); |
1da177e4 LT |
134 | extern int devinet_ioctl(unsigned int cmd, void __user *); |
135 | extern void devinet_init(void); | |
1da177e4 | 136 | extern struct in_device *inetdev_by_index(int); |
a61ced5d | 137 | extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope); |
9bd85e32 | 138 | extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope); |
60cad5da | 139 | extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask); |
1da177e4 | 140 | |
60cad5da | 141 | static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa) |
1da177e4 LT |
142 | { |
143 | return !((addr^ifa->ifa_address)&ifa->ifa_mask); | |
144 | } | |
145 | ||
146 | /* | |
147 | * Check if a mask is acceptable. | |
148 | */ | |
149 | ||
714e85be | 150 | static __inline__ int bad_mask(__be32 mask, __be32 addr) |
1da177e4 | 151 | { |
714e85be | 152 | __u32 hmask; |
1da177e4 LT |
153 | if (addr & (mask = ~mask)) |
154 | return 1; | |
714e85be AV |
155 | hmask = ntohl(mask); |
156 | if (hmask & (hmask+1)) | |
1da177e4 LT |
157 | return 1; |
158 | return 0; | |
159 | } | |
160 | ||
161 | #define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \ | |
162 | for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next) | |
163 | ||
164 | #define for_ifa(in_dev) { struct in_ifaddr *ifa; \ | |
165 | for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next) | |
166 | ||
167 | ||
168 | #define endfor_ifa(in_dev) } | |
169 | ||
e5ed6399 HX |
170 | static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev) |
171 | { | |
172 | struct in_device *in_dev = dev->ip_ptr; | |
173 | if (in_dev) | |
174 | in_dev = rcu_dereference(in_dev); | |
175 | return in_dev; | |
176 | } | |
177 | ||
1da177e4 LT |
178 | static __inline__ struct in_device * |
179 | in_dev_get(const struct net_device *dev) | |
180 | { | |
181 | struct in_device *in_dev; | |
182 | ||
183 | rcu_read_lock(); | |
e5ed6399 | 184 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 LT |
185 | if (in_dev) |
186 | atomic_inc(&in_dev->refcnt); | |
187 | rcu_read_unlock(); | |
188 | return in_dev; | |
189 | } | |
190 | ||
191 | static __inline__ struct in_device * | |
e5ed6399 | 192 | __in_dev_get_rtnl(const struct net_device *dev) |
1da177e4 LT |
193 | { |
194 | return (struct in_device*)dev->ip_ptr; | |
195 | } | |
196 | ||
197 | extern void in_dev_finish_destroy(struct in_device *idev); | |
198 | ||
199 | static inline void in_dev_put(struct in_device *idev) | |
200 | { | |
201 | if (atomic_dec_and_test(&idev->refcnt)) | |
202 | in_dev_finish_destroy(idev); | |
203 | } | |
204 | ||
205 | #define __in_dev_put(idev) atomic_dec(&(idev)->refcnt) | |
206 | #define in_dev_hold(idev) atomic_inc(&(idev)->refcnt) | |
207 | ||
208 | #endif /* __KERNEL__ */ | |
209 | ||
60cad5da | 210 | static __inline__ __be32 inet_make_mask(int logmask) |
1da177e4 LT |
211 | { |
212 | if (logmask) | |
213 | return htonl(~((1<<(32-logmask))-1)); | |
214 | return 0; | |
215 | } | |
216 | ||
714e85be | 217 | static __inline__ int inet_mask_len(__be32 mask) |
1da177e4 | 218 | { |
714e85be AV |
219 | __u32 hmask = ntohl(mask); |
220 | if (!hmask) | |
1da177e4 | 221 | return 0; |
714e85be | 222 | return 32 - ffz(~hmask); |
1da177e4 LT |
223 | } |
224 | ||
225 | ||
226 | #endif /* _LINUX_INETDEVICE_H */ |