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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 | |
d94d9fee | 13 | struct ipv4_devconf { |
1da177e4 | 14 | void *sysctl; |
42f811b8 | 15 | int data[__NET_IPV4_CONF_MAX - 1]; |
31be3085 | 16 | DECLARE_BITMAP(state, __NET_IPV4_CONF_MAX - 1); |
1da177e4 LT |
17 | }; |
18 | ||
d94d9fee | 19 | struct in_device { |
1da177e4 LT |
20 | struct net_device *dev; |
21 | atomic_t refcnt; | |
22 | int dead; | |
23 | struct in_ifaddr *ifa_list; /* IP ifaddr chain */ | |
24 | rwlock_t mc_list_lock; | |
25 | struct ip_mc_list *mc_list; /* IP multicast filter chain */ | |
b8bae41e | 26 | int mc_count; /* Number of installed mcasts */ |
1da177e4 LT |
27 | spinlock_t mc_tomb_lock; |
28 | struct ip_mc_list *mc_tomb; | |
29 | unsigned long mr_v1_seen; | |
30 | unsigned long mr_v2_seen; | |
31 | unsigned long mr_maxdelay; | |
32 | unsigned char mr_qrv; | |
33 | unsigned char mr_gq_running; | |
34 | unsigned char mr_ifc_count; | |
35 | struct timer_list mr_gq_timer; /* general query timer */ | |
36 | struct timer_list mr_ifc_timer; /* interface change timer */ | |
37 | ||
38 | struct neigh_parms *arp_parms; | |
39 | struct ipv4_devconf cnf; | |
40 | struct rcu_head rcu_head; | |
41 | }; | |
42 | ||
42f811b8 | 43 | #define IPV4_DEVCONF(cnf, attr) ((cnf).data[NET_IPV4_CONF_ ## attr - 1]) |
586f1211 PE |
44 | #define IPV4_DEVCONF_ALL(net, attr) \ |
45 | IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr) | |
42f811b8 HX |
46 | |
47 | static inline int ipv4_devconf_get(struct in_device *in_dev, int index) | |
48 | { | |
49 | index--; | |
50 | return in_dev->cnf.data[index]; | |
51 | } | |
52 | ||
53 | static inline void ipv4_devconf_set(struct in_device *in_dev, int index, | |
54 | int val) | |
55 | { | |
56 | index--; | |
31be3085 | 57 | set_bit(index, in_dev->cnf.state); |
42f811b8 HX |
58 | in_dev->cnf.data[index] = val; |
59 | } | |
60 | ||
71e27da9 HX |
61 | static inline void ipv4_devconf_setall(struct in_device *in_dev) |
62 | { | |
63 | bitmap_fill(in_dev->cnf.state, __NET_IPV4_CONF_MAX - 1); | |
64 | } | |
65 | ||
42f811b8 HX |
66 | #define IN_DEV_CONF_GET(in_dev, attr) \ |
67 | ipv4_devconf_get((in_dev), NET_IPV4_CONF_ ## attr) | |
68 | #define IN_DEV_CONF_SET(in_dev, attr, val) \ | |
69 | ipv4_devconf_set((in_dev), NET_IPV4_CONF_ ## attr, (val)) | |
70 | ||
71 | #define IN_DEV_ANDCONF(in_dev, attr) \ | |
c346dca1 | 72 | (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \ |
586f1211 | 73 | IN_DEV_CONF_GET((in_dev), attr)) |
42f811b8 | 74 | #define IN_DEV_ORCONF(in_dev, attr) \ |
c346dca1 | 75 | (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) || \ |
586f1211 | 76 | IN_DEV_CONF_GET((in_dev), attr)) |
42f811b8 | 77 | #define IN_DEV_MAXCONF(in_dev, attr) \ |
c346dca1 | 78 | (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \ |
586f1211 | 79 | IN_DEV_CONF_GET((in_dev), attr))) |
42f811b8 HX |
80 | |
81 | #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING) | |
01ecfe9b | 82 | #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING) |
27fed417 | 83 | #define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER) |
42f811b8 HX |
84 | #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \ |
85 | ACCEPT_SOURCE_ROUTE) | |
86 | #define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY) | |
87 | ||
88 | #define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS) | |
89 | #define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP) | |
90 | #define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA) | |
91 | #define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS) | |
92 | #define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \ | |
93 | SECURE_REDIRECTS) | |
94 | #define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG) | |
95 | #define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID) | |
96 | #define IN_DEV_PROMOTE_SECONDARIES(in_dev) \ | |
97 | IN_DEV_ORCONF((in_dev), \ | |
98 | PROMOTE_SECONDARIES) | |
1da177e4 LT |
99 | |
100 | #define IN_DEV_RX_REDIRECTS(in_dev) \ | |
101 | ((IN_DEV_FORWARD(in_dev) && \ | |
42f811b8 | 102 | IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \ |
1da177e4 | 103 | || (!IN_DEV_FORWARD(in_dev) && \ |
42f811b8 | 104 | IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS))) |
1da177e4 | 105 | |
42f811b8 HX |
106 | #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER) |
107 | #define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE) | |
108 | #define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE) | |
eefef1cf | 109 | #define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY) |
1da177e4 | 110 | |
d94d9fee | 111 | struct in_ifaddr { |
1da177e4 LT |
112 | struct in_ifaddr *ifa_next; |
113 | struct in_device *ifa_dev; | |
114 | struct rcu_head rcu_head; | |
a144ea4b AV |
115 | __be32 ifa_local; |
116 | __be32 ifa_address; | |
117 | __be32 ifa_mask; | |
118 | __be32 ifa_broadcast; | |
1da177e4 LT |
119 | unsigned char ifa_scope; |
120 | unsigned char ifa_flags; | |
121 | unsigned char ifa_prefixlen; | |
122 | char ifa_label[IFNAMSIZ]; | |
123 | }; | |
124 | ||
125 | extern int register_inetaddr_notifier(struct notifier_block *nb); | |
126 | extern int unregister_inetaddr_notifier(struct notifier_block *nb); | |
127 | ||
1ab35276 | 128 | extern struct net_device *ip_dev_find(struct net *net, __be32 addr); |
ff428d72 | 129 | extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b); |
e5b13cb1 | 130 | extern int devinet_ioctl(struct net *net, unsigned int cmd, void __user *); |
1da177e4 | 131 | extern void devinet_init(void); |
7fee0ca2 | 132 | extern struct in_device *inetdev_by_index(struct net *, int); |
a61ced5d | 133 | extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope); |
9bd85e32 | 134 | extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope); |
60cad5da | 135 | extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask); |
1da177e4 | 136 | |
60cad5da | 137 | static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa) |
1da177e4 LT |
138 | { |
139 | return !((addr^ifa->ifa_address)&ifa->ifa_mask); | |
140 | } | |
141 | ||
142 | /* | |
143 | * Check if a mask is acceptable. | |
144 | */ | |
145 | ||
714e85be | 146 | static __inline__ int bad_mask(__be32 mask, __be32 addr) |
1da177e4 | 147 | { |
714e85be | 148 | __u32 hmask; |
1da177e4 LT |
149 | if (addr & (mask = ~mask)) |
150 | return 1; | |
714e85be AV |
151 | hmask = ntohl(mask); |
152 | if (hmask & (hmask+1)) | |
1da177e4 LT |
153 | return 1; |
154 | return 0; | |
155 | } | |
156 | ||
157 | #define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \ | |
158 | for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next) | |
159 | ||
160 | #define for_ifa(in_dev) { struct in_ifaddr *ifa; \ | |
161 | for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next) | |
162 | ||
163 | ||
164 | #define endfor_ifa(in_dev) } | |
165 | ||
e5ed6399 HX |
166 | static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev) |
167 | { | |
168 | struct in_device *in_dev = dev->ip_ptr; | |
169 | if (in_dev) | |
170 | in_dev = rcu_dereference(in_dev); | |
171 | return in_dev; | |
172 | } | |
173 | ||
1da177e4 LT |
174 | static __inline__ struct in_device * |
175 | in_dev_get(const struct net_device *dev) | |
176 | { | |
177 | struct in_device *in_dev; | |
178 | ||
179 | rcu_read_lock(); | |
e5ed6399 | 180 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 LT |
181 | if (in_dev) |
182 | atomic_inc(&in_dev->refcnt); | |
183 | rcu_read_unlock(); | |
184 | return in_dev; | |
185 | } | |
186 | ||
187 | static __inline__ struct in_device * | |
e5ed6399 | 188 | __in_dev_get_rtnl(const struct net_device *dev) |
1da177e4 LT |
189 | { |
190 | return (struct in_device*)dev->ip_ptr; | |
191 | } | |
192 | ||
193 | extern void in_dev_finish_destroy(struct in_device *idev); | |
194 | ||
195 | static inline void in_dev_put(struct in_device *idev) | |
196 | { | |
197 | if (atomic_dec_and_test(&idev->refcnt)) | |
198 | in_dev_finish_destroy(idev); | |
199 | } | |
200 | ||
201 | #define __in_dev_put(idev) atomic_dec(&(idev)->refcnt) | |
202 | #define in_dev_hold(idev) atomic_inc(&(idev)->refcnt) | |
203 | ||
204 | #endif /* __KERNEL__ */ | |
205 | ||
60cad5da | 206 | static __inline__ __be32 inet_make_mask(int logmask) |
1da177e4 LT |
207 | { |
208 | if (logmask) | |
209 | return htonl(~((1<<(32-logmask))-1)); | |
210 | return 0; | |
211 | } | |
212 | ||
714e85be | 213 | static __inline__ int inet_mask_len(__be32 mask) |
1da177e4 | 214 | { |
714e85be AV |
215 | __u32 hmask = ntohl(mask); |
216 | if (!hmask) | |
1da177e4 | 217 | return 0; |
714e85be | 218 | return 32 - ffz(~hmask); |
1da177e4 LT |
219 | } |
220 | ||
221 | ||
222 | #endif /* _LINUX_INETDEVICE_H */ |