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
);
54 struct net_device
*dev
;
57 struct in_ifaddr
*ifa_list
; /* IP ifaddr chain */
58 struct ip_mc_list __rcu
*mc_list
; /* IP multicast filter chain */
59 int mc_count
; /* Number of installed mcasts */
60 spinlock_t mc_tomb_lock
;
61 struct ip_mc_list
*mc_tomb
;
62 unsigned long mr_v1_seen
;
63 unsigned long mr_v2_seen
;
64 unsigned long mr_maxdelay
;
66 unsigned char mr_gq_running
;
67 unsigned char mr_ifc_count
;
68 struct timer_list mr_gq_timer
; /* general query timer */
69 struct timer_list mr_ifc_timer
; /* interface change timer */
71 struct neigh_parms
*arp_parms
;
72 struct ipv4_devconf cnf
;
73 struct rcu_head rcu_head
;
76 #define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1])
77 #define IPV4_DEVCONF_ALL(net, attr) \
78 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
80 static inline int ipv4_devconf_get(struct in_device
*in_dev
, int index
)
83 return in_dev
->cnf
.data
[index
];
86 static inline void ipv4_devconf_set(struct in_device
*in_dev
, int index
,
90 set_bit(index
, in_dev
->cnf
.state
);
91 in_dev
->cnf
.data
[index
] = val
;
94 static inline void ipv4_devconf_setall(struct in_device
*in_dev
)
96 bitmap_fill(in_dev
->cnf
.state
, IPV4_DEVCONF_MAX
);
99 #define IN_DEV_CONF_GET(in_dev, attr) \
100 ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr)
101 #define IN_DEV_CONF_SET(in_dev, attr, val) \
102 ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val))
104 #define IN_DEV_ANDCONF(in_dev, attr) \
105 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
106 IN_DEV_CONF_GET((in_dev), attr))
108 #define IN_DEV_NET_ORCONF(in_dev, net, attr) \
109 (IPV4_DEVCONF_ALL(net, attr) || \
110 IN_DEV_CONF_GET((in_dev), attr))
112 #define IN_DEV_ORCONF(in_dev, attr) \
113 IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr)
115 #define IN_DEV_MAXCONF(in_dev, attr) \
116 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
117 IN_DEV_CONF_GET((in_dev), attr)))
119 #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
120 #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
121 #define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
122 #define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK)
123 #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
125 #define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
126 #define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
128 #define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
129 #define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
130 #define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN)
131 #define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
132 #define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
133 #define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
135 #define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
136 #define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
137 #define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
138 IN_DEV_ORCONF((in_dev), \
140 #define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET)
141 #define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \
142 IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET)
144 #define IN_DEV_RX_REDIRECTS(in_dev) \
145 ((IN_DEV_FORWARD(in_dev) && \
146 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
147 || (!IN_DEV_FORWARD(in_dev) && \
148 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
150 #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
151 #define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT)
152 #define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
153 #define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
154 #define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
157 struct hlist_node hash
;
158 struct in_ifaddr
*ifa_next
;
159 struct in_device
*ifa_dev
;
160 struct rcu_head rcu_head
;
164 __be32 ifa_broadcast
;
165 unsigned char ifa_scope
;
166 unsigned char ifa_flags
;
167 unsigned char ifa_prefixlen
;
168 char ifa_label
[IFNAMSIZ
];
171 extern int register_inetaddr_notifier(struct notifier_block
*nb
);
172 extern int unregister_inetaddr_notifier(struct notifier_block
*nb
);
174 extern struct net_device
*__ip_dev_find(struct net
*net
, __be32 addr
, bool devref
);
175 static inline struct net_device
*ip_dev_find(struct net
*net
, __be32 addr
)
177 return __ip_dev_find(net
, addr
, true);
180 extern int inet_addr_onlink(struct in_device
*in_dev
, __be32 a
, __be32 b
);
181 extern int devinet_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
182 extern void devinet_init(void);
183 extern struct in_device
*inetdev_by_index(struct net
*, int);
184 extern __be32
inet_select_addr(const struct net_device
*dev
, __be32 dst
, int scope
);
185 extern __be32
inet_confirm_addr(struct in_device
*in_dev
, __be32 dst
, __be32 local
, int scope
);
186 extern struct in_ifaddr
*inet_ifa_byprefix(struct in_device
*in_dev
, __be32 prefix
, __be32 mask
);
188 static __inline__
int inet_ifa_match(__be32 addr
, struct in_ifaddr
*ifa
)
190 return !((addr
^ifa
->ifa_address
)&ifa
->ifa_mask
);
194 * Check if a mask is acceptable.
197 static __inline__
int bad_mask(__be32 mask
, __be32 addr
)
200 if (addr
& (mask
= ~mask
))
203 if (hmask
& (hmask
+1))
208 #define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
209 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
211 #define for_ifa(in_dev) { struct in_ifaddr *ifa; \
212 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
215 #define endfor_ifa(in_dev) }
217 static inline struct in_device
*__in_dev_get_rcu(const struct net_device
*dev
)
219 return rcu_dereference(dev
->ip_ptr
);
222 static inline struct in_device
*in_dev_get(const struct net_device
*dev
)
224 struct in_device
*in_dev
;
227 in_dev
= __in_dev_get_rcu(dev
);
229 atomic_inc(&in_dev
->refcnt
);
234 static inline struct in_device
*__in_dev_get_rtnl(const struct net_device
*dev
)
236 return rtnl_dereference(dev
->ip_ptr
);
239 extern void in_dev_finish_destroy(struct in_device
*idev
);
241 static inline void in_dev_put(struct in_device
*idev
)
243 if (atomic_dec_and_test(&idev
->refcnt
))
244 in_dev_finish_destroy(idev
);
247 #define __in_dev_put(idev) atomic_dec(&(idev)->refcnt)
248 #define in_dev_hold(idev) atomic_inc(&(idev)->refcnt)
250 #endif /* __KERNEL__ */
252 static __inline__ __be32
inet_make_mask(int logmask
)
255 return htonl(~((1<<(32-logmask
))-1));
259 static __inline__
int inet_mask_len(__be32 mask
)
261 __u32 hmask
= ntohl(mask
);
264 return 32 - ffz(~hmask
);
268 #endif /* _LINUX_INETDEVICE_H */