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#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
53#define MC_HASH_SZ_LOG 9
54
55struct in_device {
56 struct net_device *dev;
57 atomic_t refcnt;
58 int dead;
59 struct in_ifaddr *ifa_list; /* IP ifaddr chain */
60
61 struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */
62 struct ip_mc_list __rcu * __rcu *mc_hash;
63
64 int mc_count; /* Number of installed mcasts */
65 spinlock_t mc_tomb_lock;
66 struct ip_mc_list *mc_tomb;
67 unsigned long mr_v1_seen;
68 unsigned long mr_v2_seen;
69 unsigned long mr_maxdelay;
70 unsigned char mr_qrv;
71 unsigned char mr_gq_running;
72 unsigned char mr_ifc_count;
73 struct timer_list mr_gq_timer; /* general query timer */
74 struct timer_list mr_ifc_timer; /* interface change timer */
75
76 struct neigh_parms *arp_parms;
77 struct ipv4_devconf cnf;
78 struct rcu_head rcu_head;
79};
80
81#define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1])
82#define IPV4_DEVCONF_ALL(net, attr) \
83 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
84
85static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
86{
87 index--;
88 return in_dev->cnf.data[index];
89}
90
91static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
92 int val)
93{
94 index--;
95 set_bit(index, in_dev->cnf.state);
96 in_dev->cnf.data[index] = val;
97}
98
99static inline void ipv4_devconf_setall(struct in_device *in_dev)
100{
101 bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX);
102}
103
104#define IN_DEV_CONF_GET(in_dev, attr) \
105 ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr)
106#define IN_DEV_CONF_SET(in_dev, attr, val) \
107 ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val))
108
109#define IN_DEV_ANDCONF(in_dev, attr) \
110 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
111 IN_DEV_CONF_GET((in_dev), attr))
112
113#define IN_DEV_NET_ORCONF(in_dev, net, attr) \
114 (IPV4_DEVCONF_ALL(net, attr) || \
115 IN_DEV_CONF_GET((in_dev), attr))
116
117#define IN_DEV_ORCONF(in_dev, attr) \
118 IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr)
119
120#define IN_DEV_MAXCONF(in_dev, attr) \
121 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
122 IN_DEV_CONF_GET((in_dev), attr)))
123
124#define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
125#define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
126#define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
127#define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK)
128#define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
129 ACCEPT_SOURCE_ROUTE)
130#define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
131#define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
132
133#define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
134#define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
135#define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN)
136#define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
137#define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
138#define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
139 SECURE_REDIRECTS)
140#define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
141#define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
142#define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
143 IN_DEV_ORCONF((in_dev), \
144 PROMOTE_SECONDARIES)
145#define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET)
146#define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \
147 IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET)
148
149#define IN_DEV_RX_REDIRECTS(in_dev) \
150 ((IN_DEV_FORWARD(in_dev) && \
151 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
152 || (!IN_DEV_FORWARD(in_dev) && \
153 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
154
155#define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
156#define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT)
157#define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
158#define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
159#define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
160
161struct in_ifaddr {
162 struct hlist_node hash;
163 struct in_ifaddr *ifa_next;
164 struct in_device *ifa_dev;
165 struct rcu_head rcu_head;
166 __be32 ifa_local;
167 __be32 ifa_address;
168 __be32 ifa_mask;
169 __be32 ifa_broadcast;
170 unsigned char ifa_scope;
171 unsigned char ifa_flags;
172 unsigned char ifa_prefixlen;
173 char ifa_label[IFNAMSIZ];
174
175 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
176 __u32 ifa_valid_lft;
177 __u32 ifa_preferred_lft;
178 unsigned long ifa_cstamp; /* created timestamp */
179 unsigned long ifa_tstamp; /* updated timestamp */
180};
181
182extern int register_inetaddr_notifier(struct notifier_block *nb);
183extern int unregister_inetaddr_notifier(struct notifier_block *nb);
184
185extern void inet_netconf_notify_devconf(struct net *net, int type, int ifindex,
186 struct ipv4_devconf *devconf);
187
188extern struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref);
189static inline struct net_device *ip_dev_find(struct net *net, __be32 addr)
190{
191 return __ip_dev_find(net, addr, true);
192}
193
194extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
195extern int devinet_ioctl(struct net *net, unsigned int cmd, void __user *);
196extern void devinet_init(void);
197extern struct in_device *inetdev_by_index(struct net *, int);
198extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
199extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope);
200extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask);
201
202static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
203{
204 return !((addr^ifa->ifa_address)&ifa->ifa_mask);
205}
206
207/*
208 * Check if a mask is acceptable.
209 */
210
211static __inline__ int bad_mask(__be32 mask, __be32 addr)
212{
213 __u32 hmask;
214 if (addr & (mask = ~mask))
215 return 1;
216 hmask = ntohl(mask);
217 if (hmask & (hmask+1))
218 return 1;
219 return 0;
220}
221
222#define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
223 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
224
225#define for_ifa(in_dev) { struct in_ifaddr *ifa; \
226 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
227
228
229#define endfor_ifa(in_dev) }
230
231static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
232{
233 return rcu_dereference(dev->ip_ptr);
234}
235
236static inline struct in_device *in_dev_get(const struct net_device *dev)
237{
238 struct in_device *in_dev;
239
240 rcu_read_lock();
241 in_dev = __in_dev_get_rcu(dev);
242 if (in_dev)
243 atomic_inc(&in_dev->refcnt);
244 rcu_read_unlock();
245 return in_dev;
246}
247
248static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev)
249{
250 return rtnl_dereference(dev->ip_ptr);
251}
252
253extern void in_dev_finish_destroy(struct in_device *idev);
254
255static inline void in_dev_put(struct in_device *idev)
256{
257 if (atomic_dec_and_test(&idev->refcnt))
258 in_dev_finish_destroy(idev);
259}
260
261#define __in_dev_put(idev) atomic_dec(&(idev)->refcnt)
262#define in_dev_hold(idev) atomic_inc(&(idev)->refcnt)
263
264#endif /* __KERNEL__ */
265
266static __inline__ __be32 inet_make_mask(int logmask)
267{
268 if (logmask)
269 return htonl(~((1<<(32-logmask))-1));
270 return 0;
271}
272
273static __inline__ int inet_mask_len(__be32 mask)
274{
275 __u32 hmask = ntohl(mask);
276 if (!hmask)
277 return 0;
278 return 32 - ffz(~hmask);
279}
280
281
282#endif /* _LINUX_INETDEVICE_H */