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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _LINUX_INETDEVICE_H
2#define _LINUX_INETDEVICE_H
3
4#ifdef __KERNEL__
5
Herbert Xu31be3082007-06-04 23:35:37 -07006#include <linux/bitmap.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007#include <linux/if.h>
8#include <linux/netdevice.h>
9#include <linux/rcupdate.h>
10#include <linux/timer.h>
Satyam Sharma8bfe6d62007-06-22 17:04:27 -070011#include <linux/sysctl.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012
13struct ipv4_devconf
14{
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 void *sysctl;
Herbert Xu42f811b2007-06-04 23:34:44 -070016 int data[__NET_IPV4_CONF_MAX - 1];
Herbert Xu31be3082007-06-04 23:35:37 -070017 DECLARE_BITMAP(state, __NET_IPV4_CONF_MAX - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070018};
19
Linus Torvalds1da177e2005-04-16 15:20:36 -070020struct 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 */
28 spinlock_t mc_tomb_lock;
29 struct ip_mc_list *mc_tomb;
30 unsigned long mr_v1_seen;
31 unsigned long mr_v2_seen;
32 unsigned long mr_maxdelay;
33 unsigned char mr_qrv;
34 unsigned char mr_gq_running;
35 unsigned char mr_ifc_count;
36 struct timer_list mr_gq_timer; /* general query timer */
37 struct timer_list mr_ifc_timer; /* interface change timer */
38
39 struct neigh_parms *arp_parms;
40 struct ipv4_devconf cnf;
41 struct rcu_head rcu_head;
42};
43
Herbert Xu42f811b2007-06-04 23:34:44 -070044#define IPV4_DEVCONF(cnf, attr) ((cnf).data[NET_IPV4_CONF_ ## attr - 1])
Pavel Emelyanov586f1212007-12-16 13:32:48 -080045#define IPV4_DEVCONF_ALL(net, attr) \
46 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
Herbert Xu42f811b2007-06-04 23:34:44 -070048static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
49{
50 index--;
51 return in_dev->cnf.data[index];
52}
53
54static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
55 int val)
56{
57 index--;
Herbert Xu31be3082007-06-04 23:35:37 -070058 set_bit(index, in_dev->cnf.state);
Herbert Xu42f811b2007-06-04 23:34:44 -070059 in_dev->cnf.data[index] = val;
60}
61
Herbert Xu71e27da2007-06-04 23:36:06 -070062static inline void ipv4_devconf_setall(struct in_device *in_dev)
63{
64 bitmap_fill(in_dev->cnf.state, __NET_IPV4_CONF_MAX - 1);
65}
66
Herbert Xu42f811b2007-06-04 23:34:44 -070067#define IN_DEV_CONF_GET(in_dev, attr) \
68 ipv4_devconf_get((in_dev), NET_IPV4_CONF_ ## attr)
69#define IN_DEV_CONF_SET(in_dev, attr, val) \
70 ipv4_devconf_set((in_dev), NET_IPV4_CONF_ ## attr, (val))
71
72#define IN_DEV_ANDCONF(in_dev, attr) \
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +090073 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
Pavel Emelyanov586f1212007-12-16 13:32:48 -080074 IN_DEV_CONF_GET((in_dev), attr))
Herbert Xu42f811b2007-06-04 23:34:44 -070075#define IN_DEV_ORCONF(in_dev, attr) \
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +090076 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) || \
Pavel Emelyanov586f1212007-12-16 13:32:48 -080077 IN_DEV_CONF_GET((in_dev), attr))
Herbert Xu42f811b2007-06-04 23:34:44 -070078#define IN_DEV_MAXCONF(in_dev, attr) \
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +090079 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
Pavel Emelyanov586f1212007-12-16 13:32:48 -080080 IN_DEV_CONF_GET((in_dev), attr)))
Herbert Xu42f811b2007-06-04 23:34:44 -070081
82#define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
Pavel Emelyanov01ecfe92007-12-11 02:16:47 -080083#define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
Herbert Xu42f811b2007-06-04 23:34:44 -070084#define IN_DEV_RPFILTER(in_dev) IN_DEV_ANDCONF((in_dev), RP_FILTER)
85#define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
86 ACCEPT_SOURCE_ROUTE)
87#define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
88
89#define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
90#define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
91#define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
92#define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
93#define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
94 SECURE_REDIRECTS)
95#define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
96#define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
97#define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
98 IN_DEV_ORCONF((in_dev), \
99 PROMOTE_SECONDARIES)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
101#define IN_DEV_RX_REDIRECTS(in_dev) \
102 ((IN_DEV_FORWARD(in_dev) && \
Herbert Xu42f811b2007-06-04 23:34:44 -0700103 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 || (!IN_DEV_FORWARD(in_dev) && \
Herbert Xu42f811b2007-06-04 23:34:44 -0700105 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
Herbert Xu42f811b2007-06-04 23:34:44 -0700107#define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
108#define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
109#define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
111struct in_ifaddr
112{
113 struct in_ifaddr *ifa_next;
114 struct in_device *ifa_dev;
115 struct rcu_head rcu_head;
Al Viroa144ea42006-09-28 18:00:55 -0700116 __be32 ifa_local;
117 __be32 ifa_address;
118 __be32 ifa_mask;
119 __be32 ifa_broadcast;
120 __be32 ifa_anycast;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 unsigned char ifa_scope;
122 unsigned char ifa_flags;
123 unsigned char ifa_prefixlen;
124 char ifa_label[IFNAMSIZ];
125};
126
127extern int register_inetaddr_notifier(struct notifier_block *nb);
128extern int unregister_inetaddr_notifier(struct notifier_block *nb);
129
Denis V. Lunev1ab35272008-01-22 22:04:30 -0800130extern struct net_device *ip_dev_find(struct net *net, __be32 addr);
Al Viroff428d72006-09-26 22:13:35 -0700131extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
Denis V. Luneve5b13cb2008-02-28 20:51:43 -0800132extern int devinet_ioctl(struct net *net, unsigned int cmd, void __user *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133extern void devinet_init(void);
Denis V. Lunev7fee0ca2008-01-21 17:32:38 -0800134extern struct in_device *inetdev_by_index(struct net *, int);
Al Viroa61ced52006-09-26 21:27:54 -0700135extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
Denis V. Lunev9bd85e32008-01-14 23:05:55 -0800136extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope);
Al Viro60cad5d2006-09-26 22:17:09 -0700137extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
Al Viro60cad5d2006-09-26 22:17:09 -0700139static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140{
141 return !((addr^ifa->ifa_address)&ifa->ifa_mask);
142}
143
144/*
145 * Check if a mask is acceptable.
146 */
147
Al Viro714e85b2006-11-14 20:51:49 -0800148static __inline__ int bad_mask(__be32 mask, __be32 addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149{
Al Viro714e85b2006-11-14 20:51:49 -0800150 __u32 hmask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 if (addr & (mask = ~mask))
152 return 1;
Al Viro714e85b2006-11-14 20:51:49 -0800153 hmask = ntohl(mask);
154 if (hmask & (hmask+1))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 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
Herbert Xue5ed6392005-10-03 14:35:55 -0700168static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176static __inline__ struct in_device *
177in_dev_get(const struct net_device *dev)
178{
179 struct in_device *in_dev;
180
181 rcu_read_lock();
Herbert Xue5ed6392005-10-03 14:35:55 -0700182 in_dev = __in_dev_get_rcu(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 if (in_dev)
184 atomic_inc(&in_dev->refcnt);
185 rcu_read_unlock();
186 return in_dev;
187}
188
189static __inline__ struct in_device *
Herbert Xue5ed6392005-10-03 14:35:55 -0700190__in_dev_get_rtnl(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191{
192 return (struct in_device*)dev->ip_ptr;
193}
194
195extern void in_dev_finish_destroy(struct in_device *idev);
196
197static 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
Al Viro60cad5d2006-09-26 22:17:09 -0700208static __inline__ __be32 inet_make_mask(int logmask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209{
210 if (logmask)
211 return htonl(~((1<<(32-logmask))-1));
212 return 0;
213}
214
Al Viro714e85b2006-11-14 20:51:49 -0800215static __inline__ int inet_mask_len(__be32 mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216{
Al Viro714e85b2006-11-14 20:51:49 -0800217 __u32 hmask = ntohl(mask);
218 if (!hmask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 return 0;
Al Viro714e85b2006-11-14 20:51:49 -0800220 return 32 - ffz(~hmask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221}
222
223
224#endif /* _LINUX_INETDEVICE_H */