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{
15 void *sysctl;
16 int data[__NET_IPV4_CONF_MAX - 1];
17 DECLARE_BITMAP(state, __NET_IPV4_CONF_MAX - 1);
18};
19
20struct in_device
21{
22 struct net_device *dev;
23 atomic_t refcnt;
24 int dead;
25 struct in_ifaddr *ifa_list;
26 rwlock_t mc_list_lock;
27 struct ip_mc_list *mc_list;
28 int mc_count;
29 spinlock_t mc_tomb_lock;
30 struct ip_mc_list *mc_tomb;
31 unsigned long mr_v1_seen;
32 unsigned long mr_v2_seen;
33 unsigned long mr_maxdelay;
34 unsigned char mr_qrv;
35 unsigned char mr_gq_running;
36 unsigned char mr_ifc_count;
37 struct timer_list mr_gq_timer;
38 struct timer_list mr_ifc_timer;
39
40 struct neigh_parms *arp_parms;
41 struct ipv4_devconf cnf;
42 struct rcu_head rcu_head;
43};
44
45#define IPV4_DEVCONF(cnf, attr) ((cnf).data[NET_IPV4_CONF_ ## attr - 1])
46#define IPV4_DEVCONF_ALL(net, attr) \
47 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
48
49static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
50{
51 index--;
52 return in_dev->cnf.data[index];
53}
54
55static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
56 int val)
57{
58 index--;
59 set_bit(index, in_dev->cnf.state);
60 in_dev->cnf.data[index] = val;
61}
62
63static inline void ipv4_devconf_setall(struct in_device *in_dev)
64{
65 bitmap_fill(in_dev->cnf.state, __NET_IPV4_CONF_MAX - 1);
66}
67
68#define IN_DEV_CONF_GET(in_dev, attr) \
69 ipv4_devconf_get((in_dev), NET_IPV4_CONF_ ## attr)
70#define IN_DEV_CONF_SET(in_dev, attr, val) \
71 ipv4_devconf_set((in_dev), NET_IPV4_CONF_ ## attr, (val))
72
73#define IN_DEV_ANDCONF(in_dev, attr) \
74 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
75 IN_DEV_CONF_GET((in_dev), attr))
76#define IN_DEV_ORCONF(in_dev, attr) \
77 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) || \
78 IN_DEV_CONF_GET((in_dev), attr))
79#define IN_DEV_MAXCONF(in_dev, attr) \
80 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
81 IN_DEV_CONF_GET((in_dev), attr)))
82
83#define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
84#define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
85#define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
86#define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
87 ACCEPT_SOURCE_ROUTE)
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{
115 struct in_ifaddr *ifa_next;
116 struct in_device *ifa_dev;
117 struct rcu_head rcu_head;
118 __be32 ifa_local;
119 __be32 ifa_address;
120 __be32 ifa_mask;
121 __be32 ifa_broadcast;
122 unsigned char ifa_scope;
123 unsigned char ifa_flags;
124 unsigned char ifa_prefixlen;
125 char ifa_label[IFNAMSIZ];
126};
127
128extern int register_inetaddr_notifier(struct notifier_block *nb);
129extern int unregister_inetaddr_notifier(struct notifier_block *nb);
130
131extern struct net_device *ip_dev_find(struct net *net, __be32 addr);
132extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
133extern int devinet_ioctl(struct net *net, unsigned int cmd, void __user *);
134extern void devinet_init(void);
135extern struct in_device *inetdev_by_index(struct net *, int);
136extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
137extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope);
138extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask);
139
140static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
141{
142 return !((addr^ifa->ifa_address)&ifa->ifa_mask);
143}
144
145
146
147
148
149static __inline__ int bad_mask(__be32 mask, __be32 addr)
150{
151 __u32 hmask;
152 if (addr & (mask = ~mask))
153 return 1;
154 hmask = ntohl(mask);
155 if (hmask & (hmask+1))
156 return 1;
157 return 0;
158}
159
160#define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
161 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
162
163#define for_ifa(in_dev) { struct in_ifaddr *ifa; \
164 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
165
166
167#define endfor_ifa(in_dev) }
168
169static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
170{
171 struct in_device *in_dev = dev->ip_ptr;
172 if (in_dev)
173 in_dev = rcu_dereference(in_dev);
174 return in_dev;
175}
176
177static __inline__ struct in_device *
178in_dev_get(const struct net_device *dev)
179{
180 struct in_device *in_dev;
181
182 rcu_read_lock();
183 in_dev = __in_dev_get_rcu(dev);
184 if (in_dev)
185 atomic_inc(&in_dev->refcnt);
186 rcu_read_unlock();
187 return in_dev;
188}
189
190static __inline__ struct in_device *
191__in_dev_get_rtnl(const struct net_device *dev)
192{
193 return (struct in_device*)dev->ip_ptr;
194}
195
196extern void in_dev_finish_destroy(struct in_device *idev);
197
198static inline void in_dev_put(struct in_device *idev)
199{
200 if (atomic_dec_and_test(&idev->refcnt))
201 in_dev_finish_destroy(idev);
202}
203
204#define __in_dev_put(idev) atomic_dec(&(idev)->refcnt)
205#define in_dev_hold(idev) atomic_inc(&(idev)->refcnt)
206
207#endif
208
209static __inline__ __be32 inet_make_mask(int logmask)
210{
211 if (logmask)
212 return htonl(~((1<<(32-logmask))-1));
213 return 0;
214}
215
216static __inline__ int inet_mask_len(__be32 mask)
217{
218 __u32 hmask = ntohl(mask);
219 if (!hmask)
220 return 0;
221 return 32 - ffz(~hmask);
222}
223
224
225#endif
226
