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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
Thomas Grafca7479e2010-11-16 04:31:20 +000044#define IPV4_DEVCONF_MAX (__IPV4_DEVCONF_MAX - 1)
45
Eric Dumazetd94d9fe2009-11-04 09:50:58 -080046struct ipv4_devconf {
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 void *sysctl;
Thomas Grafca7479e2010-11-16 04:31:20 +000048 int data[IPV4_DEVCONF_MAX];
49 DECLARE_BITMAP(state, IPV4_DEVCONF_MAX);
Linus Torvalds1da177e2005-04-16 15:20:36 -070050};
51
Eric Dumazetd94d9fe2009-11-04 09:50:58 -080052struct in_device {
Linus Torvalds1da177e2005-04-16 15:20:36 -070053 struct net_device *dev;
54 atomic_t refcnt;
55 int dead;
56 struct in_ifaddr *ifa_list; /* IP ifaddr chain */
Eric Dumazet1d7138d2010-11-12 05:46:50 +000057 struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */
58 int mc_count; /* Number of installed mcasts */
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 spinlock_t mc_tomb_lock;
60 struct ip_mc_list *mc_tomb;
61 unsigned long mr_v1_seen;
62 unsigned long mr_v2_seen;
63 unsigned long mr_maxdelay;
64 unsigned char mr_qrv;
65 unsigned char mr_gq_running;
66 unsigned char mr_ifc_count;
67 struct timer_list mr_gq_timer; /* general query timer */
68 struct timer_list mr_ifc_timer; /* interface change timer */
69
70 struct neigh_parms *arp_parms;
71 struct ipv4_devconf cnf;
72 struct rcu_head rcu_head;
73};
74
Eric W. Biederman02291682010-02-14 03:25:51 +000075#define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1])
Pavel Emelyanov586f1212007-12-16 13:32:48 -080076#define IPV4_DEVCONF_ALL(net, attr) \
77 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
Herbert Xu42f811b2007-06-04 23:34:44 -070079static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
80{
81 index--;
82 return in_dev->cnf.data[index];
83}
84
85static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
86 int val)
87{
88 index--;
Herbert Xu31be3082007-06-04 23:35:37 -070089 set_bit(index, in_dev->cnf.state);
Herbert Xu42f811b2007-06-04 23:34:44 -070090 in_dev->cnf.data[index] = val;
91}
92
Herbert Xu71e27da2007-06-04 23:36:06 -070093static inline void ipv4_devconf_setall(struct in_device *in_dev)
94{
Thomas Grafca7479e2010-11-16 04:31:20 +000095 bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX);
Herbert Xu71e27da2007-06-04 23:36:06 -070096}
97
Herbert Xu42f811b2007-06-04 23:34:44 -070098#define IN_DEV_CONF_GET(in_dev, attr) \
Eric W. Biederman02291682010-02-14 03:25:51 +000099 ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr)
Herbert Xu42f811b2007-06-04 23:34:44 -0700100#define IN_DEV_CONF_SET(in_dev, attr, val) \
Eric W. Biederman02291682010-02-14 03:25:51 +0000101 ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val))
Herbert Xu42f811b2007-06-04 23:34:44 -0700102
103#define IN_DEV_ANDCONF(in_dev, attr) \
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900104 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
Pavel Emelyanov586f1212007-12-16 13:32:48 -0800105 IN_DEV_CONF_GET((in_dev), attr))
Herbert Xu42f811b2007-06-04 23:34:44 -0700106#define IN_DEV_ORCONF(in_dev, attr) \
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900107 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) || \
Pavel Emelyanov586f1212007-12-16 13:32:48 -0800108 IN_DEV_CONF_GET((in_dev), attr))
Herbert Xu42f811b2007-06-04 23:34:44 -0700109#define IN_DEV_MAXCONF(in_dev, attr) \
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900110 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
Pavel Emelyanov586f1212007-12-16 13:32:48 -0800111 IN_DEV_CONF_GET((in_dev), attr)))
Herbert Xu42f811b2007-06-04 23:34:44 -0700112
113#define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
Pavel Emelyanov01ecfe92007-12-11 02:16:47 -0800114#define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
Stephen Hemminger27fed412009-07-27 18:39:45 -0700115#define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
Jamal Hadi Salim28f6aee2009-12-25 17:30:22 -0800116#define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK)
Herbert Xu42f811b2007-06-04 23:34:44 -0700117#define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
118 ACCEPT_SOURCE_ROUTE)
Patrick McHardy8153a102009-12-03 01:25:58 +0000119#define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
Herbert Xu42f811b2007-06-04 23:34:44 -0700120#define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
121
122#define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
123#define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
Jesper Dangaard Brouer65324142010-01-05 05:50:47 +0000124#define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN)
Herbert Xu42f811b2007-06-04 23:34:44 -0700125#define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
126#define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
127#define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
128 SECURE_REDIRECTS)
129#define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
130#define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
131#define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
132 IN_DEV_ORCONF((in_dev), \
133 PROMOTE_SECONDARIES)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
135#define IN_DEV_RX_REDIRECTS(in_dev) \
136 ((IN_DEV_FORWARD(in_dev) && \
Herbert Xu42f811b2007-06-04 23:34:44 -0700137 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 || (!IN_DEV_FORWARD(in_dev) && \
Herbert Xu42f811b2007-06-04 23:34:44 -0700139 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140
Herbert Xu42f811b2007-06-04 23:34:44 -0700141#define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
142#define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
143#define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
Stephen Hemmingereefef1c2009-02-01 01:04:33 -0800144#define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
Eric Dumazetd94d9fe2009-11-04 09:50:58 -0800146struct in_ifaddr {
David S. Millerfd23c3b2011-02-18 12:42:28 -0800147 struct hlist_node hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 struct in_ifaddr *ifa_next;
149 struct in_device *ifa_dev;
150 struct rcu_head rcu_head;
Al Viroa144ea42006-09-28 18:00:55 -0700151 __be32 ifa_local;
152 __be32 ifa_address;
153 __be32 ifa_mask;
154 __be32 ifa_broadcast;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 unsigned char ifa_scope;
156 unsigned char ifa_flags;
157 unsigned char ifa_prefixlen;
158 char ifa_label[IFNAMSIZ];
159};
160
161extern int register_inetaddr_notifier(struct notifier_block *nb);
162extern int unregister_inetaddr_notifier(struct notifier_block *nb);
163
Eric Dumazet82efee12010-09-30 03:31:56 +0000164extern struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref);
165static inline struct net_device *ip_dev_find(struct net *net, __be32 addr)
166{
167 return __ip_dev_find(net, addr, true);
168}
169
Al Viroff428d72006-09-26 22:13:35 -0700170extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
Denis V. Luneve5b13cb2008-02-28 20:51:43 -0800171extern int devinet_ioctl(struct net *net, unsigned int cmd, void __user *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172extern void devinet_init(void);
Denis V. Lunev7fee0ca2008-01-21 17:32:38 -0800173extern struct in_device *inetdev_by_index(struct net *, int);
Al Viroa61ced52006-09-26 21:27:54 -0700174extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
Denis V. Lunev9bd85e32008-01-14 23:05:55 -0800175extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope);
Al Viro60cad5d2006-09-26 22:17:09 -0700176extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177
Al Viro60cad5d2006-09-26 22:17:09 -0700178static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179{
180 return !((addr^ifa->ifa_address)&ifa->ifa_mask);
181}
182
183/*
184 * Check if a mask is acceptable.
185 */
186
Al Viro714e85b2006-11-14 20:51:49 -0800187static __inline__ int bad_mask(__be32 mask, __be32 addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188{
Al Viro714e85b2006-11-14 20:51:49 -0800189 __u32 hmask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 if (addr & (mask = ~mask))
191 return 1;
Al Viro714e85b2006-11-14 20:51:49 -0800192 hmask = ntohl(mask);
193 if (hmask & (hmask+1))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 return 1;
195 return 0;
196}
197
198#define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
199 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
200
201#define for_ifa(in_dev) { struct in_ifaddr *ifa; \
202 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
203
204
205#define endfor_ifa(in_dev) }
206
Herbert Xue5ed6392005-10-03 14:35:55 -0700207static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
208{
Eric Dumazet95ae6b22010-09-15 04:04:31 +0000209 return rcu_dereference(dev->ip_ptr);
Herbert Xue5ed6392005-10-03 14:35:55 -0700210}
211
Eric Dumazet95ae6b22010-09-15 04:04:31 +0000212static inline struct in_device *in_dev_get(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213{
214 struct in_device *in_dev;
215
216 rcu_read_lock();
Herbert Xue5ed6392005-10-03 14:35:55 -0700217 in_dev = __in_dev_get_rcu(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 if (in_dev)
219 atomic_inc(&in_dev->refcnt);
220 rcu_read_unlock();
221 return in_dev;
222}
223
Eric Dumazet95ae6b22010-09-15 04:04:31 +0000224static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225{
Eric Dumazet06a97012010-12-01 01:37:42 +0000226 return rtnl_dereference(dev->ip_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227}
228
229extern void in_dev_finish_destroy(struct in_device *idev);
230
231static inline void in_dev_put(struct in_device *idev)
232{
233 if (atomic_dec_and_test(&idev->refcnt))
234 in_dev_finish_destroy(idev);
235}
236
237#define __in_dev_put(idev) atomic_dec(&(idev)->refcnt)
238#define in_dev_hold(idev) atomic_inc(&(idev)->refcnt)
239
240#endif /* __KERNEL__ */
241
Al Viro60cad5d2006-09-26 22:17:09 -0700242static __inline__ __be32 inet_make_mask(int logmask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243{
244 if (logmask)
245 return htonl(~((1<<(32-logmask))-1));
246 return 0;
247}
248
Al Viro714e85b2006-11-14 20:51:49 -0800249static __inline__ int inet_mask_len(__be32 mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250{
Al Viro714e85b2006-11-14 20:51:49 -0800251 __u32 hmask = ntohl(mask);
252 if (!hmask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 return 0;
Al Viro714e85b2006-11-14 20:51:49 -0800254 return 32 - ffz(~hmask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255}
256
257
258#endif /* _LINUX_INETDEVICE_H */