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_MAX
42};
43
44#define IPV4_DEVCONF_MAX (__IPV4_DEVCONF_MAX - 1)
45
46struct ipv4_devconf {
47 void *sysctl;
48 int data[IPV4_DEVCONF_MAX];
49 DECLARE_BITMAP(state, IPV4_DEVCONF_MAX);
50};
51
52struct in_device {
53 struct net_device *dev;
54 atomic_t refcnt;
55 int dead;
56 struct in_ifaddr *ifa_list; /* IP ifaddr chain */
57 struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */
58 int mc_count; /* Number of installed mcasts */
59 spinlock_t mc_tomb_lock;
60 struct ip_mc_list *mc_tomb;
61 unsigned long mr_v1_seen;
62 unsigned long mr_v2_seen;
63 unsigned long mr_maxdelay;
64 unsigned char mr_qrv;
65 unsigned char mr_gq_running;
66 unsigned char mr_ifc_count;
67 struct timer_list mr_gq_timer; /* general query timer */
68 struct timer_list mr_ifc_timer; /* interface change timer */
69
70 struct neigh_parms *arp_parms;
71 struct ipv4_devconf cnf;
72 struct rcu_head rcu_head;
73};
74
75#define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1])
76#define IPV4_DEVCONF_ALL(net, attr) \
77 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
78
79static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
80{
81 index--;
82 return in_dev->cnf.data[index];
83}
84
85static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
86 int val)
87{
88 index--;
89 set_bit(index, in_dev->cnf.state);
90 in_dev->cnf.data[index] = val;
91}
92
93static inline void ipv4_devconf_setall(struct in_device *in_dev)
94{
95 bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX);
96}
97
98#define IN_DEV_CONF_GET(in_dev, attr) \
99 ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr)
100#define IN_DEV_CONF_SET(in_dev, attr, val) \
101 ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val))
102
103#define IN_DEV_ANDCONF(in_dev, attr) \
104 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
105 IN_DEV_CONF_GET((in_dev), attr))
106#define IN_DEV_ORCONF(in_dev, attr) \
107 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) || \
108 IN_DEV_CONF_GET((in_dev), attr))
109#define IN_DEV_MAXCONF(in_dev, attr) \
110 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
111 IN_DEV_CONF_GET((in_dev), attr)))
112
113#define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
114#define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
115#define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
116#define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK)
117#define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
118 ACCEPT_SOURCE_ROUTE)
119#define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
120#define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
121
122#define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
123#define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
124#define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN)
125#define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
126#define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
127#define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
128 SECURE_REDIRECTS)
129#define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
130#define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
131#define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
132 IN_DEV_ORCONF((in_dev), \
133 PROMOTE_SECONDARIES)
134
135#define IN_DEV_RX_REDIRECTS(in_dev) \
136 ((IN_DEV_FORWARD(in_dev) && \
137 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
138 || (!IN_DEV_FORWARD(in_dev) && \
139 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
140
141#define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
142#define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
143#define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
144#define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
145
146struct in_ifaddr {
147 struct in_ifaddr *ifa_next;
148 struct in_device *ifa_dev;
149 struct rcu_head rcu_head;
150 __be32 ifa_local;
151 __be32 ifa_address;
152 __be32 ifa_mask;
153 __be32 ifa_broadcast;
154 unsigned char ifa_scope;
155 unsigned char ifa_flags;
156 unsigned char ifa_prefixlen;
157 char ifa_label[IFNAMSIZ];
158};
159
160extern int register_inetaddr_notifier(struct notifier_block *nb);
161extern int unregister_inetaddr_notifier(struct notifier_block *nb);
162
163extern struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref);
164static inline struct net_device *ip_dev_find(struct net *net, __be32 addr)
165{
166 return __ip_dev_find(net, addr, true);
167}
168
169extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
170extern int devinet_ioctl(struct net *net, unsigned int cmd, void __user *);
171extern void devinet_init(void);
172extern struct in_device *inetdev_by_index(struct net *, int);
173extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
174extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope);
175extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask);
176
177static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
178{
179 return !((addr^ifa->ifa_address)&ifa->ifa_mask);
180}
181
182/*
183 * Check if a mask is acceptable.
184 */
185
186static __inline__ int bad_mask(__be32 mask, __be32 addr)
187{
188 __u32 hmask;
189 if (addr & (mask = ~mask))
190 return 1;
191 hmask = ntohl(mask);
192 if (hmask & (hmask+1))
193 return 1;
194 return 0;
195}
196
197#define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
198 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
199
200#define for_ifa(in_dev) { struct in_ifaddr *ifa; \
201 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
202
203
204#define endfor_ifa(in_dev) }
205
206static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
207{
208 return rcu_dereference(dev->ip_ptr);
209}
210
211static inline struct in_device *in_dev_get(const struct net_device *dev)
212{
213 struct in_device *in_dev;
214
215 rcu_read_lock();
216 in_dev = __in_dev_get_rcu(dev);
217 if (in_dev)
218 atomic_inc(&in_dev->refcnt);
219 rcu_read_unlock();
220 return in_dev;
221}
222
223static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev)
224{
225 return rtnl_dereference(dev->ip_ptr);
226}
227
228extern void in_dev_finish_destroy(struct in_device *idev);
229
230static inline void in_dev_put(struct in_device *idev)
231{
232 if (atomic_dec_and_test(&idev->refcnt))
233 in_dev_finish_destroy(idev);
234}
235
236#define __in_dev_put(idev) atomic_dec(&(idev)->refcnt)
237#define in_dev_hold(idev) atomic_inc(&(idev)->refcnt)
238
239#endif /* __KERNEL__ */
240
241static __inline__ __be32 inet_make_mask(int logmask)
242{
243 if (logmask)
244 return htonl(~((1<<(32-logmask))-1));
245 return 0;
246}
247
248static __inline__ int inet_mask_len(__be32 mask)
249{
250 __u32 hmask = ntohl(mask);
251 if (!hmask)
252 return 0;
253 return 32 - ffz(~hmask);
254}
255
256
257#endif /* _LINUX_INETDEVICE_H */