1 #ifndef _LINUX_INETDEVICE_H
2 #define _LINUX_INETDEVICE_H
6 #include <linux/bitmap.h>
9 #include <linux/netdevice.h>
10 #include <linux/rcupdate.h>
11 #include <linux/timer.h>
12 #include <linux/sysctl.h>
13 #include <linux/rtnetlink.h>
17 int data[IPV4_DEVCONF_MAX];
18 DECLARE_BITMAP(state, IPV4_DEVCONF_MAX);
21 #define MC_HASH_SZ_LOG 9
24 struct net_device *dev;
27 struct in_ifaddr *ifa_list; /* IP ifaddr chain */
29 struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */
30 struct ip_mc_list __rcu * __rcu *mc_hash;
32 int mc_count; /* Number of installed mcasts */
33 spinlock_t mc_tomb_lock;
34 struct ip_mc_list *mc_tomb;
35 unsigned long mr_v1_seen;
36 unsigned long mr_v2_seen;
37 unsigned long mr_maxdelay;
39 unsigned char mr_gq_running;
40 unsigned char mr_ifc_count;
41 struct timer_list mr_gq_timer; /* general query timer */
42 struct timer_list mr_ifc_timer; /* interface change timer */
44 struct neigh_parms *arp_parms;
45 struct ipv4_devconf cnf;
46 struct rcu_head rcu_head;
49 #define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1])
50 #define IPV4_DEVCONF_ALL(net, attr) \
51 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
53 static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
56 return in_dev->cnf.data[index];
59 static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
63 set_bit(index, in_dev->cnf.state);
64 in_dev->cnf.data[index] = val;
67 static inline void ipv4_devconf_setall(struct in_device *in_dev)
69 bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX);
72 #define IN_DEV_CONF_GET(in_dev, attr) \
73 ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr)
74 #define IN_DEV_CONF_SET(in_dev, attr, val) \
75 ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val))
77 #define IN_DEV_ANDCONF(in_dev, attr) \
78 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
79 IN_DEV_CONF_GET((in_dev), attr))
81 #define IN_DEV_NET_ORCONF(in_dev, net, attr) \
82 (IPV4_DEVCONF_ALL(net, attr) || \
83 IN_DEV_CONF_GET((in_dev), attr))
85 #define IN_DEV_ORCONF(in_dev, attr) \
86 IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr)
88 #define IN_DEV_MAXCONF(in_dev, attr) \
89 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
90 IN_DEV_CONF_GET((in_dev), attr)))
92 #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
93 #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
94 #define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
95 #define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK)
96 #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
98 #define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
99 #define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
101 #define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
102 #define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
103 #define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN)
104 #define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
105 #define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
106 #define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
108 #define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
109 #define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
110 #define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
111 IN_DEV_ORCONF((in_dev), \
113 #define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET)
114 #define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \
115 IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET)
117 #define IN_DEV_RX_REDIRECTS(in_dev) \
118 ((IN_DEV_FORWARD(in_dev) && \
119 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
120 || (!IN_DEV_FORWARD(in_dev) && \
121 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
123 #define IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) \
124 IN_DEV_CONF_GET((in_dev), IGNORE_ROUTES_WITH_LINKDOWN)
126 #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
127 #define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT)
128 #define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
129 #define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
130 #define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
133 struct hlist_node hash;
134 struct in_ifaddr *ifa_next;
135 struct in_device *ifa_dev;
136 struct rcu_head rcu_head;
140 __be32 ifa_broadcast;
141 unsigned char ifa_scope;
142 unsigned char ifa_prefixlen;
144 char ifa_label[IFNAMSIZ];
146 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
148 __u32 ifa_preferred_lft;
149 unsigned long ifa_cstamp; /* created timestamp */
150 unsigned long ifa_tstamp; /* updated timestamp */
153 int register_inetaddr_notifier(struct notifier_block *nb);
154 int unregister_inetaddr_notifier(struct notifier_block *nb);
156 void inet_netconf_notify_devconf(struct net *net, int type, int ifindex,
157 struct ipv4_devconf *devconf);
159 struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref);
160 static inline struct net_device *ip_dev_find(struct net *net, __be32 addr)
162 return __ip_dev_find(net, addr, true);
165 int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
166 int devinet_ioctl(struct net *net, unsigned int cmd, void __user *);
167 void devinet_init(void);
168 struct in_device *inetdev_by_index(struct net *, int);
169 __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
170 __be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, __be32 dst,
171 __be32 local, int scope);
172 struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix,
174 static __inline__ bool inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
176 return !((addr^ifa->ifa_address)&ifa->ifa_mask);
180 * Check if a mask is acceptable.
183 static __inline__ bool bad_mask(__be32 mask, __be32 addr)
186 if (addr & (mask = ~mask))
189 if (hmask & (hmask+1))
194 #define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
195 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
197 #define for_ifa(in_dev) { struct in_ifaddr *ifa; \
198 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
201 #define endfor_ifa(in_dev) }
203 static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
205 return rcu_dereference(dev->ip_ptr);
208 static inline struct in_device *in_dev_get(const struct net_device *dev)
210 struct in_device *in_dev;
213 in_dev = __in_dev_get_rcu(dev);
215 atomic_inc(&in_dev->refcnt);
220 static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev)
222 return rtnl_dereference(dev->ip_ptr);
225 static inline struct neigh_parms *__in_dev_arp_parms_get_rcu(const struct net_device *dev)
227 struct in_device *in_dev = __in_dev_get_rcu(dev);
229 return in_dev ? in_dev->arp_parms : NULL;
232 void in_dev_finish_destroy(struct in_device *idev);
234 static inline void in_dev_put(struct in_device *idev)
236 if (atomic_dec_and_test(&idev->refcnt))
237 in_dev_finish_destroy(idev);
240 #define __in_dev_put(idev) atomic_dec(&(idev)->refcnt)
241 #define in_dev_hold(idev) atomic_inc(&(idev)->refcnt)
243 #endif /* __KERNEL__ */
245 static __inline__ __be32 inet_make_mask(int logmask)
248 return htonl(~((1U<<(32-logmask))-1));
252 static __inline__ int inet_mask_len(__be32 mask)
254 __u32 hmask = ntohl(mask);
257 return 32 - ffz(~hmask);
261 #endif /* _LINUX_INETDEVICE_H */