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