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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>
Eric Dumazet95ae6b22010-09-15 04:04:31 +000012#include <linux/rtnetlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013
Eric W. Biederman02291682010-02-14 03:25:51 +000014enum
15{
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,
27 IPV4_DEVCONF_TAG,
28 IPV4_DEVCONF_ARPFILTER,
29 IPV4_DEVCONF_MEDIUM_ID,
30 IPV4_DEVCONF_NOXFRM,
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_MAX
42};
43
Eric Dumazetd94d9fe2009-11-04 09:50:58 -080044struct ipv4_devconf {
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 void *sysctl;
Eric W. Biederman02291682010-02-14 03:25:51 +000046 int data[__IPV4_DEVCONF_MAX - 1];
47 DECLARE_BITMAP(state, __IPV4_DEVCONF_MAX - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070048};
49
Eric Dumazetd94d9fe2009-11-04 09:50:58 -080050struct in_device {
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 struct net_device *dev;
52 atomic_t refcnt;
53 int dead;
54 struct in_ifaddr *ifa_list; /* IP ifaddr chain */
55 rwlock_t mc_list_lock;
56 struct ip_mc_list *mc_list; /* IP multicast filter chain */
Rami Rosenb8bae412008-10-07 15:34:37 -070057 int mc_count; /* Number of installed mcasts */
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 spinlock_t mc_tomb_lock;
59 struct ip_mc_list *mc_tomb;
60 unsigned long mr_v1_seen;
61 unsigned long mr_v2_seen;
62 unsigned long mr_maxdelay;
63 unsigned char mr_qrv;
64 unsigned char mr_gq_running;
65 unsigned char mr_ifc_count;
66 struct timer_list mr_gq_timer; /* general query timer */
67 struct timer_list mr_ifc_timer; /* interface change timer */
68
69 struct neigh_parms *arp_parms;
70 struct ipv4_devconf cnf;
71 struct rcu_head rcu_head;
72};
73
Eric W. Biederman02291682010-02-14 03:25:51 +000074#define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1])
Pavel Emelyanov586f1212007-12-16 13:32:48 -080075#define IPV4_DEVCONF_ALL(net, attr) \
76 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
Herbert Xu42f811b2007-06-04 23:34:44 -070078static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
79{
80 index--;
81 return in_dev->cnf.data[index];
82}
83
84static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
85 int val)
86{
87 index--;
Herbert Xu31be3082007-06-04 23:35:37 -070088 set_bit(index, in_dev->cnf.state);
Herbert Xu42f811b2007-06-04 23:34:44 -070089 in_dev->cnf.data[index] = val;
90}
91
Herbert Xu71e27da2007-06-04 23:36:06 -070092static inline void ipv4_devconf_setall(struct in_device *in_dev)
93{
Eric W. Biederman02291682010-02-14 03:25:51 +000094 bitmap_fill(in_dev->cnf.state, __IPV4_DEVCONF_MAX - 1);
Herbert Xu71e27da2007-06-04 23:36:06 -070095}
96
Herbert Xu42f811b2007-06-04 23:34:44 -070097#define IN_DEV_CONF_GET(in_dev, attr) \
Eric W. Biederman02291682010-02-14 03:25:51 +000098 ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr)
Herbert Xu42f811b2007-06-04 23:34:44 -070099#define IN_DEV_CONF_SET(in_dev, attr, val) \
Eric W. Biederman02291682010-02-14 03:25:51 +0000100 ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val))
Herbert Xu42f811b2007-06-04 23:34:44 -0700101
102#define IN_DEV_ANDCONF(in_dev, attr) \
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900103 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
Pavel Emelyanov586f1212007-12-16 13:32:48 -0800104 IN_DEV_CONF_GET((in_dev), attr))
Herbert Xu42f811b2007-06-04 23:34:44 -0700105#define IN_DEV_ORCONF(in_dev, attr) \
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900106 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) || \
Pavel Emelyanov586f1212007-12-16 13:32:48 -0800107 IN_DEV_CONF_GET((in_dev), attr))
Herbert Xu42f811b2007-06-04 23:34:44 -0700108#define IN_DEV_MAXCONF(in_dev, attr) \
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900109 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
Pavel Emelyanov586f1212007-12-16 13:32:48 -0800110 IN_DEV_CONF_GET((in_dev), attr)))
Herbert Xu42f811b2007-06-04 23:34:44 -0700111
112#define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
Pavel Emelyanov01ecfe92007-12-11 02:16:47 -0800113#define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
Stephen Hemminger27fed412009-07-27 18:39:45 -0700114#define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
Jamal Hadi Salim28f6aee2009-12-25 17:30:22 -0800115#define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK)
Herbert Xu42f811b2007-06-04 23:34:44 -0700116#define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
117 ACCEPT_SOURCE_ROUTE)
Patrick McHardy8153a102009-12-03 01:25:58 +0000118#define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
Herbert Xu42f811b2007-06-04 23:34:44 -0700119#define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
120
121#define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
122#define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
Jesper Dangaard Brouer65324142010-01-05 05:50:47 +0000123#define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN)
Herbert Xu42f811b2007-06-04 23:34:44 -0700124#define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
125#define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
126#define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
127 SECURE_REDIRECTS)
128#define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
129#define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
130#define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
131 IN_DEV_ORCONF((in_dev), \
132 PROMOTE_SECONDARIES)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
134#define IN_DEV_RX_REDIRECTS(in_dev) \
135 ((IN_DEV_FORWARD(in_dev) && \
Herbert Xu42f811b2007-06-04 23:34:44 -0700136 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 || (!IN_DEV_FORWARD(in_dev) && \
Herbert Xu42f811b2007-06-04 23:34:44 -0700138 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
Herbert Xu42f811b2007-06-04 23:34:44 -0700140#define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
141#define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
142#define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
Stephen Hemmingereefef1c2009-02-01 01:04:33 -0800143#define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144
Eric Dumazetd94d9fe2009-11-04 09:50:58 -0800145struct in_ifaddr {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 struct in_ifaddr *ifa_next;
147 struct in_device *ifa_dev;
148 struct rcu_head rcu_head;
Al Viroa144ea42006-09-28 18:00:55 -0700149 __be32 ifa_local;
150 __be32 ifa_address;
151 __be32 ifa_mask;
152 __be32 ifa_broadcast;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 unsigned char ifa_scope;
154 unsigned char ifa_flags;
155 unsigned char ifa_prefixlen;
156 char ifa_label[IFNAMSIZ];
157};
158
159extern int register_inetaddr_notifier(struct notifier_block *nb);
160extern int unregister_inetaddr_notifier(struct notifier_block *nb);
161
Eric Dumazet82efee12010-09-30 03:31:56 +0000162extern struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref);
163static inline struct net_device *ip_dev_find(struct net *net, __be32 addr)
164{
165 return __ip_dev_find(net, addr, true);
166}
167
Al Viroff428d72006-09-26 22:13:35 -0700168extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
Denis V. Luneve5b13cb2008-02-28 20:51:43 -0800169extern int devinet_ioctl(struct net *net, unsigned int cmd, void __user *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170extern void devinet_init(void);
Denis V. Lunev7fee0ca2008-01-21 17:32:38 -0800171extern struct in_device *inetdev_by_index(struct net *, int);
Al Viroa61ced52006-09-26 21:27:54 -0700172extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
Denis V. Lunev9bd85e32008-01-14 23:05:55 -0800173extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope);
Al Viro60cad5d2006-09-26 22:17:09 -0700174extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175
Al Viro60cad5d2006-09-26 22:17:09 -0700176static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177{
178 return !((addr^ifa->ifa_address)&ifa->ifa_mask);
179}
180
181/*
182 * Check if a mask is acceptable.
183 */
184
Al Viro714e85b2006-11-14 20:51:49 -0800185static __inline__ int bad_mask(__be32 mask, __be32 addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186{
Al Viro714e85b2006-11-14 20:51:49 -0800187 __u32 hmask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 if (addr & (mask = ~mask))
189 return 1;
Al Viro714e85b2006-11-14 20:51:49 -0800190 hmask = ntohl(mask);
191 if (hmask & (hmask+1))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 return 1;
193 return 0;
194}
195
196#define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
197 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
198
199#define for_ifa(in_dev) { struct in_ifaddr *ifa; \
200 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
201
202
203#define endfor_ifa(in_dev) }
204
Herbert Xue5ed6392005-10-03 14:35:55 -0700205static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
206{
Eric Dumazet95ae6b22010-09-15 04:04:31 +0000207 return rcu_dereference(dev->ip_ptr);
Herbert Xue5ed6392005-10-03 14:35:55 -0700208}
209
Eric Dumazet95ae6b22010-09-15 04:04:31 +0000210static inline struct in_device *in_dev_get(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211{
212 struct in_device *in_dev;
213
214 rcu_read_lock();
Herbert Xue5ed6392005-10-03 14:35:55 -0700215 in_dev = __in_dev_get_rcu(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 if (in_dev)
217 atomic_inc(&in_dev->refcnt);
218 rcu_read_unlock();
219 return in_dev;
220}
221
Eric Dumazet95ae6b22010-09-15 04:04:31 +0000222static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223{
Eric Dumazet95ae6b22010-09-15 04:04:31 +0000224 return rcu_dereference_check(dev->ip_ptr, lockdep_rtnl_is_held());
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225}
226
227extern void in_dev_finish_destroy(struct in_device *idev);
228
229static inline void in_dev_put(struct in_device *idev)
230{
231 if (atomic_dec_and_test(&idev->refcnt))
232 in_dev_finish_destroy(idev);
233}
234
235#define __in_dev_put(idev) atomic_dec(&(idev)->refcnt)
236#define in_dev_hold(idev) atomic_inc(&(idev)->refcnt)
237
238#endif /* __KERNEL__ */
239
Al Viro60cad5d2006-09-26 22:17:09 -0700240static __inline__ __be32 inet_make_mask(int logmask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241{
242 if (logmask)
243 return htonl(~((1<<(32-logmask))-1));
244 return 0;
245}
246
Al Viro714e85b2006-11-14 20:51:49 -0800247static __inline__ int inet_mask_len(__be32 mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248{
Al Viro714e85b2006-11-14 20:51:49 -0800249 __u32 hmask = ntohl(mask);
250 if (!hmask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 return 0;
Al Viro714e85b2006-11-14 20:51:49 -0800252 return 32 - ffz(~hmask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253}
254
255
256#endif /* _LINUX_INETDEVICE_H */