1 #ifndef _LINUX_INETDEVICE_H
2 #define _LINUX_INETDEVICE_H
6 #include <linux/bitmap.h>
8 #include <linux/netdevice.h>
9 #include <linux/rcupdate.h>
10 #include <linux/timer.h>
11 #include <linux/sysctl.h>
12 #include <linux/rtnetlink.h>
16 IPV4_DEVCONF_FORWARDING
=1,
17 IPV4_DEVCONF_MC_FORWARDING
,
18 IPV4_DEVCONF_PROXY_ARP
,
19 IPV4_DEVCONF_ACCEPT_REDIRECTS
,
20 IPV4_DEVCONF_SECURE_REDIRECTS
,
21 IPV4_DEVCONF_SEND_REDIRECTS
,
22 IPV4_DEVCONF_SHARED_MEDIA
,
23 IPV4_DEVCONF_RP_FILTER
,
24 IPV4_DEVCONF_ACCEPT_SOURCE_ROUTE
,
25 IPV4_DEVCONF_BOOTP_RELAY
,
26 IPV4_DEVCONF_LOG_MARTIANS
,
28 IPV4_DEVCONF_ARPFILTER
,
29 IPV4_DEVCONF_MEDIUM_ID
,
31 IPV4_DEVCONF_NOPOLICY
,
32 IPV4_DEVCONF_FORCE_IGMP_VERSION
,
33 IPV4_DEVCONF_ARP_ANNOUNCE
,
34 IPV4_DEVCONF_ARP_IGNORE
,
35 IPV4_DEVCONF_PROMOTE_SECONDARIES
,
36 IPV4_DEVCONF_ARP_ACCEPT
,
37 IPV4_DEVCONF_ARP_NOTIFY
,
38 IPV4_DEVCONF_ACCEPT_LOCAL
,
39 IPV4_DEVCONF_SRC_VMARK
,
40 IPV4_DEVCONF_PROXY_ARP_PVLAN
,
41 IPV4_DEVCONF_ROUTE_LOCALNET
,
45 #define IPV4_DEVCONF_MAX (__IPV4_DEVCONF_MAX - 1)
49 int data
[IPV4_DEVCONF_MAX
];
50 DECLARE_BITMAP(state
, IPV4_DEVCONF_MAX
);
53 #define MC_HASH_SZ_LOG 9
56 struct net_device
*dev
;
59 struct in_ifaddr
*ifa_list
; /* IP ifaddr chain */
61 struct ip_mc_list __rcu
*mc_list
; /* IP multicast filter chain */
62 struct ip_mc_list __rcu
* __rcu
*mc_hash
;
64 int mc_count
; /* Number of installed mcasts */
65 spinlock_t mc_tomb_lock
;
66 struct ip_mc_list
*mc_tomb
;
67 unsigned long mr_v1_seen
;
68 unsigned long mr_v2_seen
;
69 unsigned long mr_maxdelay
;
71 unsigned char mr_gq_running
;
72 unsigned char mr_ifc_count
;
73 struct timer_list mr_gq_timer
; /* general query timer */
74 struct timer_list mr_ifc_timer
; /* interface change timer */
76 struct neigh_parms
*arp_parms
;
77 struct ipv4_devconf cnf
;
78 struct rcu_head rcu_head
;
81 #define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1])
82 #define IPV4_DEVCONF_ALL(net, attr) \
83 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
85 static inline int ipv4_devconf_get(struct in_device
*in_dev
, int index
)
88 return in_dev
->cnf
.data
[index
];
91 static inline void ipv4_devconf_set(struct in_device
*in_dev
, int index
,
95 set_bit(index
, in_dev
->cnf
.state
);
96 in_dev
->cnf
.data
[index
] = val
;
99 static inline void ipv4_devconf_setall(struct in_device
*in_dev
)
101 bitmap_fill(in_dev
->cnf
.state
, IPV4_DEVCONF_MAX
);
104 #define IN_DEV_CONF_GET(in_dev, attr) \
105 ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr)
106 #define IN_DEV_CONF_SET(in_dev, attr, val) \
107 ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val))
109 #define IN_DEV_ANDCONF(in_dev, attr) \
110 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
111 IN_DEV_CONF_GET((in_dev), attr))
113 #define IN_DEV_NET_ORCONF(in_dev, net, attr) \
114 (IPV4_DEVCONF_ALL(net, attr) || \
115 IN_DEV_CONF_GET((in_dev), attr))
117 #define IN_DEV_ORCONF(in_dev, attr) \
118 IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr)
120 #define IN_DEV_MAXCONF(in_dev, attr) \
121 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
122 IN_DEV_CONF_GET((in_dev), attr)))
124 #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
125 #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
126 #define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
127 #define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK)
128 #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
130 #define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
131 #define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
133 #define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
134 #define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
135 #define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN)
136 #define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
137 #define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
138 #define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
140 #define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
141 #define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
142 #define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
143 IN_DEV_ORCONF((in_dev), \
145 #define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET)
146 #define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \
147 IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET)
149 #define IN_DEV_RX_REDIRECTS(in_dev) \
150 ((IN_DEV_FORWARD(in_dev) && \
151 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
152 || (!IN_DEV_FORWARD(in_dev) && \
153 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
155 #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
156 #define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT)
157 #define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
158 #define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
159 #define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
162 struct hlist_node hash
;
163 struct in_ifaddr
*ifa_next
;
164 struct in_device
*ifa_dev
;
165 struct rcu_head rcu_head
;
169 __be32 ifa_broadcast
;
170 unsigned char ifa_scope
;
171 unsigned char ifa_flags
;
172 unsigned char ifa_prefixlen
;
173 char ifa_label
[IFNAMSIZ
];
175 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
177 __u32 ifa_preferred_lft
;
178 unsigned long ifa_cstamp
; /* created timestamp */
179 unsigned long ifa_tstamp
; /* updated timestamp */
182 extern int register_inetaddr_notifier(struct notifier_block
*nb
);
183 extern int unregister_inetaddr_notifier(struct notifier_block
*nb
);
185 extern void inet_netconf_notify_devconf(struct net
*net
, int type
, int ifindex
,
186 struct ipv4_devconf
*devconf
);
188 extern struct net_device
*__ip_dev_find(struct net
*net
, __be32 addr
, bool devref
);
189 static inline struct net_device
*ip_dev_find(struct net
*net
, __be32 addr
)
191 return __ip_dev_find(net
, addr
, true);
194 extern int inet_addr_onlink(struct in_device
*in_dev
, __be32 a
, __be32 b
);
195 extern int devinet_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
196 extern void devinet_init(void);
197 extern struct in_device
*inetdev_by_index(struct net
*, int);
198 extern __be32
inet_select_addr(const struct net_device
*dev
, __be32 dst
, int scope
);
199 extern __be32
inet_confirm_addr(struct in_device
*in_dev
, __be32 dst
, __be32 local
, int scope
);
200 extern struct in_ifaddr
*inet_ifa_byprefix(struct in_device
*in_dev
, __be32 prefix
, __be32 mask
);
202 static __inline__
int inet_ifa_match(__be32 addr
, struct in_ifaddr
*ifa
)
204 return !((addr
^ifa
->ifa_address
)&ifa
->ifa_mask
);
208 * Check if a mask is acceptable.
211 static __inline__
int bad_mask(__be32 mask
, __be32 addr
)
214 if (addr
& (mask
= ~mask
))
217 if (hmask
& (hmask
+1))
222 #define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
223 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
225 #define for_ifa(in_dev) { struct in_ifaddr *ifa; \
226 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
229 #define endfor_ifa(in_dev) }
231 static inline struct in_device
*__in_dev_get_rcu(const struct net_device
*dev
)
233 return rcu_dereference(dev
->ip_ptr
);
236 static inline struct in_device
*in_dev_get(const struct net_device
*dev
)
238 struct in_device
*in_dev
;
241 in_dev
= __in_dev_get_rcu(dev
);
243 atomic_inc(&in_dev
->refcnt
);
248 static inline struct in_device
*__in_dev_get_rtnl(const struct net_device
*dev
)
250 return rtnl_dereference(dev
->ip_ptr
);
253 extern void in_dev_finish_destroy(struct in_device
*idev
);
255 static inline void in_dev_put(struct in_device
*idev
)
257 if (atomic_dec_and_test(&idev
->refcnt
))
258 in_dev_finish_destroy(idev
);
261 #define __in_dev_put(idev) atomic_dec(&(idev)->refcnt)
262 #define in_dev_hold(idev) atomic_inc(&(idev)->refcnt)
264 #endif /* __KERNEL__ */
266 static __inline__ __be32
inet_make_mask(int logmask
)
269 return htonl(~((1<<(32-logmask
))-1));
273 static __inline__
int inet_mask_len(__be32 mask
)
275 __u32 hmask
= ntohl(mask
);
278 return 32 - ffz(~hmask
);
282 #endif /* _LINUX_INETDEVICE_H */