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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>
stephen hemminger4a5a8aa2013-08-21 21:09:47 -07008#include <linux/ip.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <linux/netdevice.h>
10#include <linux/rcupdate.h>
11#include <linux/timer.h>
Satyam Sharma8bfe6d62007-06-22 17:04:27 -070012#include <linux/sysctl.h>
Eric Dumazet95ae6b22010-09-15 04:04:31 +000013#include <linux/rtnetlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014
Eric Dumazetd94d9fe2009-11-04 09:50:58 -080015struct ipv4_devconf {
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 void *sysctl;
Thomas Grafca7479e2010-11-16 04:31:20 +000017 int data[IPV4_DEVCONF_MAX];
18 DECLARE_BITMAP(state, IPV4_DEVCONF_MAX);
Linus Torvalds1da177e2005-04-16 15:20:36 -070019};
20
Eric Dumazete9897072013-06-07 08:48:57 -070021#define MC_HASH_SZ_LOG 9
22
Eric Dumazetd94d9fe2009-11-04 09:50:58 -080023struct in_device {
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 struct net_device *dev;
25 atomic_t refcnt;
26 int dead;
27 struct in_ifaddr *ifa_list; /* IP ifaddr chain */
Eric Dumazete9897072013-06-07 08:48:57 -070028
Eric Dumazet1d7138d2010-11-12 05:46:50 +000029 struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */
Eric Dumazete9897072013-06-07 08:48:57 -070030 struct ip_mc_list __rcu * __rcu *mc_hash;
31
Eric Dumazet1d7138d2010-11-12 05:46:50 +000032 int mc_count; /* Number of installed mcasts */
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 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;
38 unsigned char mr_qrv;
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 */
43
44 struct neigh_parms *arp_parms;
45 struct ipv4_devconf cnf;
46 struct rcu_head rcu_head;
47};
48
Eric W. Biederman02291682010-02-14 03:25:51 +000049#define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1])
Pavel Emelyanov586f1212007-12-16 13:32:48 -080050#define IPV4_DEVCONF_ALL(net, attr) \
51 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Herbert Xu42f811b2007-06-04 23:34:44 -070053static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
54{
55 index--;
56 return in_dev->cnf.data[index];
57}
58
59static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
60 int val)
61{
62 index--;
Herbert Xu31be3082007-06-04 23:35:37 -070063 set_bit(index, in_dev->cnf.state);
Herbert Xu42f811b2007-06-04 23:34:44 -070064 in_dev->cnf.data[index] = val;
65}
66
Herbert Xu71e27da2007-06-04 23:36:06 -070067static inline void ipv4_devconf_setall(struct in_device *in_dev)
68{
Thomas Grafca7479e2010-11-16 04:31:20 +000069 bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX);
Herbert Xu71e27da2007-06-04 23:36:06 -070070}
71
Herbert Xu42f811b2007-06-04 23:34:44 -070072#define IN_DEV_CONF_GET(in_dev, attr) \
Eric W. Biederman02291682010-02-14 03:25:51 +000073 ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr)
Herbert Xu42f811b2007-06-04 23:34:44 -070074#define IN_DEV_CONF_SET(in_dev, attr, val) \
Eric W. Biederman02291682010-02-14 03:25:51 +000075 ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val))
Herbert Xu42f811b2007-06-04 23:34:44 -070076
77#define IN_DEV_ANDCONF(in_dev, attr) \
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +090078 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
Pavel Emelyanov586f1212007-12-16 13:32:48 -080079 IN_DEV_CONF_GET((in_dev), attr))
Eric Dumazet9eb43e72012-08-03 21:27:25 +000080
81#define IN_DEV_NET_ORCONF(in_dev, net, attr) \
82 (IPV4_DEVCONF_ALL(net, attr) || \
Pavel Emelyanov586f1212007-12-16 13:32:48 -080083 IN_DEV_CONF_GET((in_dev), attr))
Eric Dumazet9eb43e72012-08-03 21:27:25 +000084
85#define IN_DEV_ORCONF(in_dev, attr) \
86 IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr)
87
Herbert Xu42f811b2007-06-04 23:34:44 -070088#define IN_DEV_MAXCONF(in_dev, attr) \
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +090089 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
Pavel Emelyanov586f1212007-12-16 13:32:48 -080090 IN_DEV_CONF_GET((in_dev), attr)))
Herbert Xu42f811b2007-06-04 23:34:44 -070091
92#define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
Pavel Emelyanov01ecfe92007-12-11 02:16:47 -080093#define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
Stephen Hemminger27fed412009-07-27 18:39:45 -070094#define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
Jamal Hadi Salim28f6aee2009-12-25 17:30:22 -080095#define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK)
Herbert Xu42f811b2007-06-04 23:34:44 -070096#define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
97 ACCEPT_SOURCE_ROUTE)
Patrick McHardy8153a102009-12-03 01:25:58 +000098#define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
Herbert Xu42f811b2007-06-04 23:34:44 -070099#define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
100
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)
Jesper Dangaard Brouer65324142010-01-05 05:50:47 +0000103#define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN)
Herbert Xu42f811b2007-06-04 23:34:44 -0700104#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), \
107 SECURE_REDIRECTS)
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), \
112 PROMOTE_SECONDARIES)
Thomas Grafd0daebc32012-06-12 00:44:01 +0000113#define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET)
Eric Dumazet9eb43e72012-08-03 21:27:25 +0000114#define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \
115 IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116
117#define IN_DEV_RX_REDIRECTS(in_dev) \
118 ((IN_DEV_FORWARD(in_dev) && \
Herbert Xu42f811b2007-06-04 23:34:44 -0700119 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 || (!IN_DEV_FORWARD(in_dev) && \
Herbert Xu42f811b2007-06-04 23:34:44 -0700121 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
Herbert Xu42f811b2007-06-04 23:34:44 -0700123#define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
Neil Horman124d37e2012-03-15 05:25:58 +0000124#define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT)
Herbert Xu42f811b2007-06-04 23:34:44 -0700125#define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
126#define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
Stephen Hemmingereefef1c2009-02-01 01:04:33 -0800127#define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128
Eric Dumazetd94d9fe2009-11-04 09:50:58 -0800129struct in_ifaddr {
David S. Millerfd23c3b2011-02-18 12:42:28 -0800130 struct hlist_node hash;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 struct in_ifaddr *ifa_next;
132 struct in_device *ifa_dev;
133 struct rcu_head rcu_head;
Al Viroa144ea42006-09-28 18:00:55 -0700134 __be32 ifa_local;
135 __be32 ifa_address;
136 __be32 ifa_mask;
137 __be32 ifa_broadcast;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 unsigned char ifa_scope;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 unsigned char ifa_prefixlen;
Jiri Pirkoad6c8132013-12-08 12:16:10 +0100140 __u32 ifa_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 char ifa_label[IFNAMSIZ];
Jiri Pirko5c766d62013-01-24 09:41:41 +0000142
143 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
144 __u32 ifa_valid_lft;
145 __u32 ifa_preferred_lft;
146 unsigned long ifa_cstamp; /* created timestamp */
147 unsigned long ifa_tstamp; /* updated timestamp */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148};
149
Joe Perchesf629d202013-09-26 14:48:15 -0700150int register_inetaddr_notifier(struct notifier_block *nb);
151int unregister_inetaddr_notifier(struct notifier_block *nb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
Joe Perchesf629d202013-09-26 14:48:15 -0700153void inet_netconf_notify_devconf(struct net *net, int type, int ifindex,
154 struct ipv4_devconf *devconf);
Nicolas Dichteld67b8c62012-12-04 01:13:35 +0000155
Joe Perchesf629d202013-09-26 14:48:15 -0700156struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref);
Eric Dumazet82efee12010-09-30 03:31:56 +0000157static inline struct net_device *ip_dev_find(struct net *net, __be32 addr)
158{
159 return __ip_dev_find(net, addr, true);
160}
161
Joe Perchesf629d202013-09-26 14:48:15 -0700162int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
163int devinet_ioctl(struct net *net, unsigned int cmd, void __user *);
164void devinet_init(void);
165struct in_device *inetdev_by_index(struct net *, int);
166__be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
Nicolas Dichtelb601fa12013-12-10 15:02:40 +0100167__be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, __be32 dst,
168 __be32 local, int scope);
Joe Perchesf629d202013-09-26 14:48:15 -0700169struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix,
170 __be32 mask);
Al Viro60cad5d2006-09-26 22:17:09 -0700171static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172{
173 return !((addr^ifa->ifa_address)&ifa->ifa_mask);
174}
175
176/*
177 * Check if a mask is acceptable.
178 */
179
Al Viro714e85b2006-11-14 20:51:49 -0800180static __inline__ int bad_mask(__be32 mask, __be32 addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181{
Al Viro714e85b2006-11-14 20:51:49 -0800182 __u32 hmask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 if (addr & (mask = ~mask))
184 return 1;
Al Viro714e85b2006-11-14 20:51:49 -0800185 hmask = ntohl(mask);
186 if (hmask & (hmask+1))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 return 1;
188 return 0;
189}
190
191#define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
192 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
193
194#define for_ifa(in_dev) { struct in_ifaddr *ifa; \
195 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
196
197
198#define endfor_ifa(in_dev) }
199
Herbert Xue5ed6392005-10-03 14:35:55 -0700200static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
201{
Eric Dumazet95ae6b22010-09-15 04:04:31 +0000202 return rcu_dereference(dev->ip_ptr);
Herbert Xue5ed6392005-10-03 14:35:55 -0700203}
204
Eric Dumazet95ae6b22010-09-15 04:04:31 +0000205static inline struct in_device *in_dev_get(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206{
207 struct in_device *in_dev;
208
209 rcu_read_lock();
Herbert Xue5ed6392005-10-03 14:35:55 -0700210 in_dev = __in_dev_get_rcu(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 if (in_dev)
212 atomic_inc(&in_dev->refcnt);
213 rcu_read_unlock();
214 return in_dev;
215}
216
Eric Dumazet95ae6b22010-09-15 04:04:31 +0000217static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218{
Eric Dumazet06a97012010-12-01 01:37:42 +0000219 return rtnl_dereference(dev->ip_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220}
221
Jiri Pirko1d4c8c22013-12-07 19:26:56 +0100222static inline struct neigh_parms *__in_dev_arp_parms_get_rcu(const struct net_device *dev)
223{
224 struct in_device *in_dev = __in_dev_get_rcu(dev);
225
226 return in_dev ? in_dev->arp_parms : NULL;
227}
228
Joe Perchesf629d202013-09-26 14:48:15 -0700229void in_dev_finish_destroy(struct in_device *idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
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)
Vincent BENAYOUN84bc8862014-11-13 13:47:26 +0100245 return htonl(~((1U<<(32-logmask))-1));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 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 */