1#ifndef _LINUX_INETDEVICE_H
2#define _LINUX_INETDEVICE_H
3
4#ifdef __KERNEL__
5
6#include <linux/bitmap.h>
7#include <linux/if.h>
8#include <linux/netdevice.h>
9#include <linux/rcupdate.h>
10#include <linux/timer.h>
11#include <linux/sysctl.h>
12#include <linux/rtnetlink.h>
13
14enum
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_ROUTE_LOCALNET,
42 __IPV4_DEVCONF_MAX
43};
44
45#define IPV4_DEVCONF_MAX (__IPV4_DEVCONF_MAX - 1)
46
47struct ipv4_devconf {
48 void *sysctl;
49 int data[IPV4_DEVCONF_MAX];
50 DECLARE_BITMAP(state, IPV4_DEVCONF_MAX);
51};
52
53struct in_device {
54 struct net_device *dev;
55 atomic_t refcnt;
56 int dead;
57 struct in_ifaddr *ifa_list;
58 struct ip_mc_list __rcu *mc_list;
59 int mc_count;
60 spinlock_t mc_tomb_lock;
61 struct ip_mc_list *mc_tomb;
62 unsigned long mr_v1_seen;
63 unsigned long mr_v2_seen;
64 unsigned long mr_maxdelay;
65 unsigned char mr_qrv;
66 unsigned char mr_gq_running;
67 unsigned char mr_ifc_count;
68 struct timer_list mr_gq_timer;
69 struct timer_list mr_ifc_timer;
70
71 struct neigh_parms *arp_parms;
72 struct ipv4_devconf cnf;
73 struct rcu_head rcu_head;
74};
75
76#define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1])
77#define IPV4_DEVCONF_ALL(net, attr) \
78 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
79
80static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
81{
82 index--;
83 return in_dev->cnf.data[index];
84}
85
86static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
87 int val)
88{
89 index--;
90 set_bit(index, in_dev->cnf.state);
91 in_dev->cnf.data[index] = val;
92}
93
94static inline void ipv4_devconf_setall(struct in_device *in_dev)
95{
96 bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX);
97}
98
99#define IN_DEV_CONF_GET(in_dev, attr) \
100 ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr)
101#define IN_DEV_CONF_SET(in_dev, attr, val) \
102 ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val))
103
104#define IN_DEV_ANDCONF(in_dev, attr) \
105 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
106 IN_DEV_CONF_GET((in_dev), attr))
107
108#define IN_DEV_NET_ORCONF(in_dev, net, attr) \
109 (IPV4_DEVCONF_ALL(net, attr) || \
110 IN_DEV_CONF_GET((in_dev), attr))
111
112#define IN_DEV_ORCONF(in_dev, attr) \
113 IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr)
114
115#define IN_DEV_MAXCONF(in_dev, attr) \
116 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
117 IN_DEV_CONF_GET((in_dev), attr)))
118
119#define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
120#define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
121#define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
122#define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK)
123#define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
124 ACCEPT_SOURCE_ROUTE)
125#define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
126#define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
127
128#define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
129#define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
130#define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN)
131#define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
132#define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
133#define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
134 SECURE_REDIRECTS)
135#define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
136#define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
137#define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
138 IN_DEV_ORCONF((in_dev), \
139 PROMOTE_SECONDARIES)
140#define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET)
141#define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \
142 IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET)
143
144#define IN_DEV_RX_REDIRECTS(in_dev) \
145 ((IN_DEV_FORWARD(in_dev) && \
146 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
147 || (!IN_DEV_FORWARD(in_dev) && \
148 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
149
150#define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
151#define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT)
152#define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
153#define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
154#define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
155
156struct in_ifaddr {
157 struct hlist_node hash;
158 struct in_ifaddr *ifa_next;
159 struct in_device *ifa_dev;
160 struct rcu_head rcu_head;
161 __be32 ifa_local;
162 __be32 ifa_address;
163 __be32 ifa_mask;
164 __be32 ifa_broadcast;
165 unsigned char ifa_scope;
166 unsigned char ifa_flags;
167 unsigned char ifa_prefixlen;
168 char ifa_label[IFNAMSIZ];
169
170
171 __u32 ifa_valid_lft;
172 __u32 ifa_preferred_lft;
173 unsigned long ifa_cstamp;
174 unsigned long ifa_tstamp;
175};
176
177extern int register_inetaddr_notifier(struct notifier_block *nb);
178extern int unregister_inetaddr_notifier(struct notifier_block *nb);
179
180extern void inet_netconf_notify_devconf(struct net *net, int type, int ifindex,
181 struct ipv4_devconf *devconf);
182
183extern struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref);
184static inline struct net_device *ip_dev_find(struct net *net, __be32 addr)
185{
186 return __ip_dev_find(net, addr, true);
187}
188
189extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
190extern int devinet_ioctl(struct net *net, unsigned int cmd, void __user *);
191extern void devinet_init(void);
192extern struct in_device *inetdev_by_index(struct net *, int);
193extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
194extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope);
195extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask);
196
197static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
198{
199 return !((addr^ifa->ifa_address)&ifa->ifa_mask);
200}
201
202
203
204
205
206static __inline__ int bad_mask(__be32 mask, __be32 addr)
207{
208 __u32 hmask;
209 if (addr & (mask = ~mask))
210 return 1;
211 hmask = ntohl(mask);
212 if (hmask & (hmask+1))
213 return 1;
214 return 0;
215}
216
217#define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
218 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
219
220#define for_ifa(in_dev) { struct in_ifaddr *ifa; \
221 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
222
223
224#define endfor_ifa(in_dev) }
225
226static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
227{
228 return rcu_dereference(dev->ip_ptr);
229}
230
231static inline struct in_device *in_dev_get(const struct net_device *dev)
232{
233 struct in_device *in_dev;
234
235 rcu_read_lock();
236 in_dev = __in_dev_get_rcu(dev);
237 if (in_dev)
238 atomic_inc(&in_dev->refcnt);
239 rcu_read_unlock();
240 return in_dev;
241}
242
243static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev)
244{
245 return rtnl_dereference(dev->ip_ptr);
246}
247
248extern void in_dev_finish_destroy(struct in_device *idev);
249
250static inline void in_dev_put(struct in_device *idev)
251{
252 if (atomic_dec_and_test(&idev->refcnt))
253 in_dev_finish_destroy(idev);
254}
255
256#define __in_dev_put(idev) atomic_dec(&(idev)->refcnt)
257#define in_dev_hold(idev) atomic_inc(&(idev)->refcnt)
258
259#endif
260
261static __inline__ __be32 inet_make_mask(int logmask)
262{
263 if (logmask)
264 return htonl(~((1<<(32-logmask))-1));
265 return 0;
266}
267
268static __inline__ int inet_mask_len(__be32 mask)
269{
270 __u32 hmask = ntohl(mask);
271 if (!hmask)
272 return 0;
273 return 32 - ffz(~hmask);
274}
275
276
277#endif
278
