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/ip.h>
9#include <linux/netdevice.h>
10#include <linux/rcupdate.h>
11#include <linux/timer.h>
12#include <linux/sysctl.h>
13#include <linux/rtnetlink.h>
14
15struct ipv4_devconf {
16 void *sysctl;
17 int data[IPV4_DEVCONF_MAX];
18 DECLARE_BITMAP(state, IPV4_DEVCONF_MAX);
19};
20
21#define MC_HASH_SZ_LOG 9
22
23struct in_device {
24 struct net_device *dev;
25 atomic_t refcnt;
26 int dead;
27 struct in_ifaddr *ifa_list;
28
29 struct ip_mc_list __rcu *mc_list;
30 struct ip_mc_list __rcu * __rcu *mc_hash;
31
32 int mc_count;
33 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;
42 struct timer_list mr_ifc_timer;
43
44 struct neigh_parms *arp_parms;
45 struct ipv4_devconf cnf;
46 struct rcu_head rcu_head;
47};
48
49#define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1])
50#define IPV4_DEVCONF_ALL(net, attr) \
51 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
52
53static 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--;
63 set_bit(index, in_dev->cnf.state);
64 in_dev->cnf.data[index] = val;
65}
66
67static inline void ipv4_devconf_setall(struct in_device *in_dev)
68{
69 bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX);
70}
71
72#define IN_DEV_CONF_GET(in_dev, attr) \
73 ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr)
74#define IN_DEV_CONF_SET(in_dev, attr, val) \
75 ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val))
76
77#define IN_DEV_ANDCONF(in_dev, attr) \
78 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
79 IN_DEV_CONF_GET((in_dev), attr))
80
81#define IN_DEV_NET_ORCONF(in_dev, net, attr) \
82 (IPV4_DEVCONF_ALL(net, attr) || \
83 IN_DEV_CONF_GET((in_dev), attr))
84
85#define IN_DEV_ORCONF(in_dev, attr) \
86 IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr)
87
88#define IN_DEV_MAXCONF(in_dev, attr) \
89 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
90 IN_DEV_CONF_GET((in_dev), attr)))
91
92#define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
93#define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
94#define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
95#define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK)
96#define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
97 ACCEPT_SOURCE_ROUTE)
98#define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
99#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)
103#define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN)
104#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)
113#define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET)
114#define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \
115 IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET)
116
117#define IN_DEV_RX_REDIRECTS(in_dev) \
118 ((IN_DEV_FORWARD(in_dev) && \
119 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
120 || (!IN_DEV_FORWARD(in_dev) && \
121 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
122
123#define IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) \
124 IN_DEV_CONF_GET((in_dev), IGNORE_ROUTES_WITH_LINKDOWN)
125
126#define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
127#define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT)
128#define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
129#define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
130#define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
131
132struct in_ifaddr {
133 struct hlist_node hash;
134 struct in_ifaddr *ifa_next;
135 struct in_device *ifa_dev;
136 struct rcu_head rcu_head;
137 __be32 ifa_local;
138 __be32 ifa_address;
139 __be32 ifa_mask;
140 __be32 ifa_broadcast;
141 unsigned char ifa_scope;
142 unsigned char ifa_prefixlen;
143 __u32 ifa_flags;
144 char ifa_label[IFNAMSIZ];
145
146
147 __u32 ifa_valid_lft;
148 __u32 ifa_preferred_lft;
149 unsigned long ifa_cstamp;
150 unsigned long ifa_tstamp;
151};
152
153int register_inetaddr_notifier(struct notifier_block *nb);
154int unregister_inetaddr_notifier(struct notifier_block *nb);
155
156void inet_netconf_notify_devconf(struct net *net, int type, int ifindex,
157 struct ipv4_devconf *devconf);
158
159struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref);
160static inline struct net_device *ip_dev_find(struct net *net, __be32 addr)
161{
162 return __ip_dev_find(net, addr, true);
163}
164
165int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
166int devinet_ioctl(struct net *net, unsigned int cmd, void __user *);
167void devinet_init(void);
168struct in_device *inetdev_by_index(struct net *, int);
169__be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
170__be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, __be32 dst,
171 __be32 local, int scope);
172struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix,
173 __be32 mask);
174static __inline__ bool inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
175{
176 return !((addr^ifa->ifa_address)&ifa->ifa_mask);
177}
178
179
180
181
182
183static __inline__ bool bad_mask(__be32 mask, __be32 addr)
184{
185 __u32 hmask;
186 if (addr & (mask = ~mask))
187 return true;
188 hmask = ntohl(mask);
189 if (hmask & (hmask+1))
190 return true;
191 return false;
192}
193
194#define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
195 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
196
197#define for_ifa(in_dev) { struct in_ifaddr *ifa; \
198 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
199
200
201#define endfor_ifa(in_dev) }
202
203static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
204{
205 return rcu_dereference(dev->ip_ptr);
206}
207
208static inline struct in_device *in_dev_get(const struct net_device *dev)
209{
210 struct in_device *in_dev;
211
212 rcu_read_lock();
213 in_dev = __in_dev_get_rcu(dev);
214 if (in_dev)
215 atomic_inc(&in_dev->refcnt);
216 rcu_read_unlock();
217 return in_dev;
218}
219
220static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev)
221{
222 return rtnl_dereference(dev->ip_ptr);
223}
224
225static inline struct neigh_parms *__in_dev_arp_parms_get_rcu(const struct net_device *dev)
226{
227 struct in_device *in_dev = __in_dev_get_rcu(dev);
228
229 return in_dev ? in_dev->arp_parms : NULL;
230}
231
232void in_dev_finish_destroy(struct in_device *idev);
233
234static inline void in_dev_put(struct in_device *idev)
235{
236 if (atomic_dec_and_test(&idev->refcnt))
237 in_dev_finish_destroy(idev);
238}
239
240#define __in_dev_put(idev) atomic_dec(&(idev)->refcnt)
241#define in_dev_hold(idev) atomic_inc(&(idev)->refcnt)
242
243#endif
244
245static __inline__ __be32 inet_make_mask(int logmask)
246{
247 if (logmask)
248 return htonl(~((1U<<(32-logmask))-1));
249 return 0;
250}
251
252static __inline__ int inet_mask_len(__be32 mask)
253{
254 __u32 hmask = ntohl(mask);
255 if (!hmask)
256 return 0;
257 return 32 - ffz(~hmask);
258}
259
260
261#endif
262
