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
13struct ipv4_devconf {
14 void *sysctl;
15 int data[__NET_IPV4_CONF_MAX - 1];
16 DECLARE_BITMAP(state, __NET_IPV4_CONF_MAX - 1);
17};
18
19struct in_device {
20 struct net_device *dev;
21 atomic_t refcnt;
22 int dead;
23 struct in_ifaddr *ifa_list;
24 rwlock_t mc_list_lock;
25 struct ip_mc_list *mc_list;
26 int mc_count;
27 spinlock_t mc_tomb_lock;
28 struct ip_mc_list *mc_tomb;
29 unsigned long mr_v1_seen;
30 unsigned long mr_v2_seen;
31 unsigned long mr_maxdelay;
32 unsigned char mr_qrv;
33 unsigned char mr_gq_running;
34 unsigned char mr_ifc_count;
35 struct timer_list mr_gq_timer;
36 struct timer_list mr_ifc_timer;
37
38 struct neigh_parms *arp_parms;
39 struct ipv4_devconf cnf;
40 struct rcu_head rcu_head;
41};
42
43#define IPV4_DEVCONF(cnf, attr) ((cnf).data[NET_IPV4_CONF_ ## attr - 1])
44#define IPV4_DEVCONF_ALL(net, attr) \
45 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
46
47static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
48{
49 index--;
50 return in_dev->cnf.data[index];
51}
52
53static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
54 int val)
55{
56 index--;
57 set_bit(index, in_dev->cnf.state);
58 in_dev->cnf.data[index] = val;
59}
60
61static inline void ipv4_devconf_setall(struct in_device *in_dev)
62{
63 bitmap_fill(in_dev->cnf.state, __NET_IPV4_CONF_MAX - 1);
64}
65
66#define IN_DEV_CONF_GET(in_dev, attr) \
67 ipv4_devconf_get((in_dev), NET_IPV4_CONF_ ## attr)
68#define IN_DEV_CONF_SET(in_dev, attr, val) \
69 ipv4_devconf_set((in_dev), NET_IPV4_CONF_ ## attr, (val))
70
71#define IN_DEV_ANDCONF(in_dev, attr) \
72 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
73 IN_DEV_CONF_GET((in_dev), attr))
74#define IN_DEV_ORCONF(in_dev, attr) \
75 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) || \
76 IN_DEV_CONF_GET((in_dev), attr))
77#define IN_DEV_MAXCONF(in_dev, attr) \
78 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
79 IN_DEV_CONF_GET((in_dev), attr)))
80
81#define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
82#define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
83#define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
84#define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK)
85#define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
86 ACCEPT_SOURCE_ROUTE)
87#define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
88#define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
89
90#define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
91#define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
92#define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
93#define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
94#define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
95 SECURE_REDIRECTS)
96#define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
97#define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
98#define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
99 IN_DEV_ORCONF((in_dev), \
100 PROMOTE_SECONDARIES)
101
102#define IN_DEV_RX_REDIRECTS(in_dev) \
103 ((IN_DEV_FORWARD(in_dev) && \
104 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
105 || (!IN_DEV_FORWARD(in_dev) && \
106 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
107
108#define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
109#define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
110#define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
111#define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
112
113struct in_ifaddr {
114 struct in_ifaddr *ifa_next;
115 struct in_device *ifa_dev;
116 struct rcu_head rcu_head;
117 __be32 ifa_local;
118 __be32 ifa_address;
119 __be32 ifa_mask;
120 __be32 ifa_broadcast;
121 unsigned char ifa_scope;
122 unsigned char ifa_flags;
123 unsigned char ifa_prefixlen;
124 char ifa_label[IFNAMSIZ];
125};
126
127extern int register_inetaddr_notifier(struct notifier_block *nb);
128extern int unregister_inetaddr_notifier(struct notifier_block *nb);
129
130extern struct net_device *ip_dev_find(struct net *net, __be32 addr);
131extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
132extern int devinet_ioctl(struct net *net, unsigned int cmd, void __user *);
133extern void devinet_init(void);
134extern struct in_device *inetdev_by_index(struct net *, int);
135extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
136extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope);
137extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask);
138
139static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
140{
141 return !((addr^ifa->ifa_address)&ifa->ifa_mask);
142}
143
144
145
146
147
148static __inline__ int bad_mask(__be32 mask, __be32 addr)
149{
150 __u32 hmask;
151 if (addr & (mask = ~mask))
152 return 1;
153 hmask = ntohl(mask);
154 if (hmask & (hmask+1))
155 return 1;
156 return 0;
157}
158
159#define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
160 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
161
162#define for_ifa(in_dev) { struct in_ifaddr *ifa; \
163 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
164
165
166#define endfor_ifa(in_dev) }
167
168static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
169{
170 struct in_device *in_dev = dev->ip_ptr;
171 if (in_dev)
172 in_dev = rcu_dereference(in_dev);
173 return in_dev;
174}
175
176static __inline__ struct in_device *
177in_dev_get(const struct net_device *dev)
178{
179 struct in_device *in_dev;
180
181 rcu_read_lock();
182 in_dev = __in_dev_get_rcu(dev);
183 if (in_dev)
184 atomic_inc(&in_dev->refcnt);
185 rcu_read_unlock();
186 return in_dev;
187}
188
189static __inline__ struct in_device *
190__in_dev_get_rtnl(const struct net_device *dev)
191{
192 return (struct in_device*)dev->ip_ptr;
193}
194
195extern void in_dev_finish_destroy(struct in_device *idev);
196
197static inline void in_dev_put(struct in_device *idev)
198{
199 if (atomic_dec_and_test(&idev->refcnt))
200 in_dev_finish_destroy(idev);
201}
202
203#define __in_dev_put(idev) atomic_dec(&(idev)->refcnt)
204#define in_dev_hold(idev) atomic_inc(&(idev)->refcnt)
205
206#endif
207
208static __inline__ __be32 inet_make_mask(int logmask)
209{
210 if (logmask)
211 return htonl(~((1<<(32-logmask))-1));
212 return 0;
213}
214
215static __inline__ int inet_mask_len(__be32 mask)
216{
217 __u32 hmask = ntohl(mask);
218 if (!hmask)
219 return 0;
220 return 32 - ffz(~hmask);
221}
222
223
224#endif
225
