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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 | ||
1da177e4 LT |
20 | struct in_device |
21 | { | |
22 | struct net_device *dev; | |
23 | atomic_t refcnt; | |
24 | int dead; | |
25 | struct in_ifaddr *ifa_list; /* IP ifaddr chain */ | |
26 | rwlock_t mc_list_lock; | |
27 | struct ip_mc_list *mc_list; /* IP multicast filter chain */ | |
b8bae41e | 28 | int mc_count; /* Number of installed mcasts */ |
1da177e4 LT |
29 | spinlock_t mc_tomb_lock; |
30 | struct ip_mc_list *mc_tomb; | |
31 | unsigned long mr_v1_seen; | |
32 | unsigned long mr_v2_seen; | |
33 | unsigned long mr_maxdelay; | |
34 | unsigned char mr_qrv; | |
35 | unsigned char mr_gq_running; | |
36 | unsigned char mr_ifc_count; | |
37 | struct timer_list mr_gq_timer; /* general query timer */ | |
38 | struct timer_list mr_ifc_timer; /* interface change timer */ | |
39 | ||
40 | struct neigh_parms *arp_parms; | |
41 | struct ipv4_devconf cnf; | |
42 | struct rcu_head rcu_head; | |
43 | }; | |
44 | ||
42f811b8 | 45 | #define IPV4_DEVCONF(cnf, attr) ((cnf).data[NET_IPV4_CONF_ ## attr - 1]) |
586f1211 PE |
46 | #define IPV4_DEVCONF_ALL(net, attr) \ |
47 | IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr) | |
42f811b8 HX |
48 | |
49 | static inline int ipv4_devconf_get(struct in_device *in_dev, int index) | |
50 | { | |
51 | index--; | |
52 | return in_dev->cnf.data[index]; | |
53 | } | |
54 | ||
55 | static inline void ipv4_devconf_set(struct in_device *in_dev, int index, | |
56 | int val) | |
57 | { | |
58 | index--; | |
31be3085 | 59 | set_bit(index, in_dev->cnf.state); |
42f811b8 HX |
60 | in_dev->cnf.data[index] = val; |
61 | } | |
62 | ||
71e27da9 HX |
63 | static inline void ipv4_devconf_setall(struct in_device *in_dev) |
64 | { | |
65 | bitmap_fill(in_dev->cnf.state, __NET_IPV4_CONF_MAX - 1); | |
66 | } | |
67 | ||
42f811b8 HX |
68 | #define IN_DEV_CONF_GET(in_dev, attr) \ |
69 | ipv4_devconf_get((in_dev), NET_IPV4_CONF_ ## attr) | |
70 | #define IN_DEV_CONF_SET(in_dev, attr, val) \ | |
71 | ipv4_devconf_set((in_dev), NET_IPV4_CONF_ ## attr, (val)) | |
72 | ||
73 | #define IN_DEV_ANDCONF(in_dev, attr) \ | |
c346dca1 | 74 | (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \ |
586f1211 | 75 | IN_DEV_CONF_GET((in_dev), attr)) |
42f811b8 | 76 | #define IN_DEV_ORCONF(in_dev, attr) \ |
c346dca1 | 77 | (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) || \ |
586f1211 | 78 | IN_DEV_CONF_GET((in_dev), attr)) |
42f811b8 | 79 | #define IN_DEV_MAXCONF(in_dev, attr) \ |
c346dca1 | 80 | (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \ |
586f1211 | 81 | IN_DEV_CONF_GET((in_dev), attr))) |
42f811b8 HX |
82 | |
83 | #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING) | |
01ecfe9b | 84 | #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING) |
42f811b8 HX |
85 | #define IN_DEV_RPFILTER(in_dev) IN_DEV_ANDCONF((in_dev), RP_FILTER) |
86 | #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \ | |
87 | ACCEPT_SOURCE_ROUTE) | |
88 | #define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY) | |
89 | ||
90 | #define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS) | |
91 | #define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP) | |
92 | #define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA) | |
93 | #define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS) | |
94 | #define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \ | |
95 | SECURE_REDIRECTS) | |
96 | #define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG) | |
97 | #define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID) | |
98 | #define IN_DEV_PROMOTE_SECONDARIES(in_dev) \ | |
99 | IN_DEV_ORCONF((in_dev), \ | |
100 | PROMOTE_SECONDARIES) | |
1da177e4 LT |
101 | |
102 | #define IN_DEV_RX_REDIRECTS(in_dev) \ | |
103 | ((IN_DEV_FORWARD(in_dev) && \ | |
42f811b8 | 104 | IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \ |
1da177e4 | 105 | || (!IN_DEV_FORWARD(in_dev) && \ |
42f811b8 | 106 | IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS))) |
1da177e4 | 107 | |
42f811b8 HX |
108 | #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER) |
109 | #define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE) | |
110 | #define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE) | |
1da177e4 LT |
111 | |
112 | struct in_ifaddr | |
113 | { | |
114 | struct in_ifaddr *ifa_next; | |
115 | struct in_device *ifa_dev; | |
116 | struct rcu_head rcu_head; | |
a144ea4b AV |
117 | __be32 ifa_local; |
118 | __be32 ifa_address; | |
119 | __be32 ifa_mask; | |
120 | __be32 ifa_broadcast; | |
1da177e4 LT |
121 | unsigned char ifa_scope; |
122 | unsigned char ifa_flags; | |
123 | unsigned char ifa_prefixlen; | |
124 | char ifa_label[IFNAMSIZ]; | |
125 | }; | |
126 | ||
127 | extern int register_inetaddr_notifier(struct notifier_block *nb); | |
128 | extern int unregister_inetaddr_notifier(struct notifier_block *nb); | |
129 | ||
1ab35276 | 130 | extern struct net_device *ip_dev_find(struct net *net, __be32 addr); |
ff428d72 | 131 | extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b); |
e5b13cb1 | 132 | extern int devinet_ioctl(struct net *net, unsigned int cmd, void __user *); |
1da177e4 | 133 | extern void devinet_init(void); |
7fee0ca2 | 134 | extern struct in_device *inetdev_by_index(struct net *, int); |
a61ced5d | 135 | extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope); |
9bd85e32 | 136 | extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope); |
60cad5da | 137 | extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask); |
1da177e4 | 138 | |
60cad5da | 139 | static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa) |
1da177e4 LT |
140 | { |
141 | return !((addr^ifa->ifa_address)&ifa->ifa_mask); | |
142 | } | |
143 | ||
144 | /* | |
145 | * Check if a mask is acceptable. | |
146 | */ | |
147 | ||
714e85be | 148 | static __inline__ int bad_mask(__be32 mask, __be32 addr) |
1da177e4 | 149 | { |
714e85be | 150 | __u32 hmask; |
1da177e4 LT |
151 | if (addr & (mask = ~mask)) |
152 | return 1; | |
714e85be AV |
153 | hmask = ntohl(mask); |
154 | if (hmask & (hmask+1)) | |
1da177e4 LT |
155 | return 1; |
156 | return 0; | |
157 | } | |
158 | ||
159 | #define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \ | |
160 | for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next) | |
161 | ||
162 | #define for_ifa(in_dev) { struct in_ifaddr *ifa; \ | |
163 | for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next) | |
164 | ||
165 | ||
166 | #define endfor_ifa(in_dev) } | |
167 | ||
e5ed6399 HX |
168 | static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev) |
169 | { | |
170 | struct in_device *in_dev = dev->ip_ptr; | |
171 | if (in_dev) | |
172 | in_dev = rcu_dereference(in_dev); | |
173 | return in_dev; | |
174 | } | |
175 | ||
1da177e4 LT |
176 | static __inline__ struct in_device * |
177 | in_dev_get(const struct net_device *dev) | |
178 | { | |
179 | struct in_device *in_dev; | |
180 | ||
181 | rcu_read_lock(); | |
e5ed6399 | 182 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 LT |
183 | if (in_dev) |
184 | atomic_inc(&in_dev->refcnt); | |
185 | rcu_read_unlock(); | |
186 | return in_dev; | |
187 | } | |
188 | ||
189 | static __inline__ struct in_device * | |
e5ed6399 | 190 | __in_dev_get_rtnl(const struct net_device *dev) |
1da177e4 LT |
191 | { |
192 | return (struct in_device*)dev->ip_ptr; | |
193 | } | |
194 | ||
195 | extern void in_dev_finish_destroy(struct in_device *idev); | |
196 | ||
197 | static inline void in_dev_put(struct in_device *idev) | |
198 | { | |
199 | if (atomic_dec_and_test(&idev->refcnt)) | |
200 | in_dev_finish_destroy(idev); | |
201 | } | |
202 | ||
203 | #define __in_dev_put(idev) atomic_dec(&(idev)->refcnt) | |
204 | #define in_dev_hold(idev) atomic_inc(&(idev)->refcnt) | |
205 | ||
206 | #endif /* __KERNEL__ */ | |
207 | ||
60cad5da | 208 | static __inline__ __be32 inet_make_mask(int logmask) |
1da177e4 LT |
209 | { |
210 | if (logmask) | |
211 | return htonl(~((1<<(32-logmask))-1)); | |
212 | return 0; | |
213 | } | |
214 | ||
714e85be | 215 | static __inline__ int inet_mask_len(__be32 mask) |
1da177e4 | 216 | { |
714e85be AV |
217 | __u32 hmask = ntohl(mask); |
218 | if (!hmask) | |
1da177e4 | 219 | return 0; |
714e85be | 220 | return 32 - ffz(~hmask); |
1da177e4 LT |
221 | } |
222 | ||
223 | ||
224 | #endif /* _LINUX_INETDEVICE_H */ |