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/if.h>
7#include <linux/netdevice.h>
8#include <linux/rcupdate.h>
9#include <linux/timer.h>
10
11struct ipv4_devconf
12{
13 int accept_redirects;
14 int send_redirects;
15 int secure_redirects;
16 int shared_media;
17 int accept_source_route;
18 int rp_filter;
19 int proxy_arp;
20 int bootp_relay;
21 int log_martians;
22 int forwarding;
23 int mc_forwarding;
24 int tag;
25 int arp_filter;
26 int arp_announce;
27 int arp_ignore;
28 int arp_accept;
29 int medium_id;
30 int no_xfrm;
31 int no_policy;
32 int force_igmp_version;
33 int promote_secondaries;
34 void *sysctl;
35};
36
37extern struct ipv4_devconf ipv4_devconf;
38
39struct in_device
40{
41 struct net_device *dev;
42 atomic_t refcnt;
43 int dead;
44 struct in_ifaddr *ifa_list; /* IP ifaddr chain */
45 rwlock_t mc_list_lock;
46 struct ip_mc_list *mc_list; /* IP multicast filter chain */
47 spinlock_t mc_tomb_lock;
48 struct ip_mc_list *mc_tomb;
49 unsigned long mr_v1_seen;
50 unsigned long mr_v2_seen;
51 unsigned long mr_maxdelay;
52 unsigned char mr_qrv;
53 unsigned char mr_gq_running;
54 unsigned char mr_ifc_count;
55 struct timer_list mr_gq_timer; /* general query timer */
56 struct timer_list mr_ifc_timer; /* interface change timer */
57
58 struct neigh_parms *arp_parms;
59 struct ipv4_devconf cnf;
60 struct rcu_head rcu_head;
61};
62
63#define IN_DEV_FORWARD(in_dev) ((in_dev)->cnf.forwarding)
64#define IN_DEV_MFORWARD(in_dev) (ipv4_devconf.mc_forwarding && (in_dev)->cnf.mc_forwarding)
65#define IN_DEV_RPFILTER(in_dev) (ipv4_devconf.rp_filter && (in_dev)->cnf.rp_filter)
66#define IN_DEV_SOURCE_ROUTE(in_dev) (ipv4_devconf.accept_source_route && (in_dev)->cnf.accept_source_route)
67#define IN_DEV_BOOTP_RELAY(in_dev) (ipv4_devconf.bootp_relay && (in_dev)->cnf.bootp_relay)
68
69#define IN_DEV_LOG_MARTIANS(in_dev) (ipv4_devconf.log_martians || (in_dev)->cnf.log_martians)
70#define IN_DEV_PROXY_ARP(in_dev) (ipv4_devconf.proxy_arp || (in_dev)->cnf.proxy_arp)
71#define IN_DEV_SHARED_MEDIA(in_dev) (ipv4_devconf.shared_media || (in_dev)->cnf.shared_media)
72#define IN_DEV_TX_REDIRECTS(in_dev) (ipv4_devconf.send_redirects || (in_dev)->cnf.send_redirects)
73#define IN_DEV_SEC_REDIRECTS(in_dev) (ipv4_devconf.secure_redirects || (in_dev)->cnf.secure_redirects)
74#define IN_DEV_IDTAG(in_dev) ((in_dev)->cnf.tag)
75#define IN_DEV_MEDIUM_ID(in_dev) ((in_dev)->cnf.medium_id)
76#define IN_DEV_PROMOTE_SECONDARIES(in_dev) (ipv4_devconf.promote_secondaries || (in_dev)->cnf.promote_secondaries)
77
78#define IN_DEV_RX_REDIRECTS(in_dev) \
79 ((IN_DEV_FORWARD(in_dev) && \
80 (ipv4_devconf.accept_redirects && (in_dev)->cnf.accept_redirects)) \
81 || (!IN_DEV_FORWARD(in_dev) && \
82 (ipv4_devconf.accept_redirects || (in_dev)->cnf.accept_redirects)))
83
84#define IN_DEV_ARPFILTER(in_dev) (ipv4_devconf.arp_filter || (in_dev)->cnf.arp_filter)
85#define IN_DEV_ARP_ANNOUNCE(in_dev) (max(ipv4_devconf.arp_announce, (in_dev)->cnf.arp_announce))
86#define IN_DEV_ARP_IGNORE(in_dev) (max(ipv4_devconf.arp_ignore, (in_dev)->cnf.arp_ignore))
87
88struct in_ifaddr
89{
90 struct in_ifaddr *ifa_next;
91 struct in_device *ifa_dev;
92 struct rcu_head rcu_head;
93 u32 ifa_local;
94 u32 ifa_address;
95 u32 ifa_mask;
96 u32 ifa_broadcast;
97 u32 ifa_anycast;
98 unsigned char ifa_scope;
99 unsigned char ifa_flags;
100 unsigned char ifa_prefixlen;
101 char ifa_label[IFNAMSIZ];
102};
103
104extern int register_inetaddr_notifier(struct notifier_block *nb);
105extern int unregister_inetaddr_notifier(struct notifier_block *nb);
106
107extern struct net_device *ip_dev_find(u32 addr);
108extern int inet_addr_onlink(struct in_device *in_dev, u32 a, u32 b);
109extern int devinet_ioctl(unsigned int cmd, void __user *);
110extern void devinet_init(void);
111extern struct in_device *inetdev_init(struct net_device *dev);
112extern struct in_device *inetdev_by_index(int);
113extern u32 inet_select_addr(const struct net_device *dev, u32 dst, int scope);
114extern u32 inet_confirm_addr(const struct net_device *dev, u32 dst, u32 local, int scope);
115extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, u32 prefix, u32 mask);
116extern void inet_forward_change(void);
117
118static __inline__ int inet_ifa_match(u32 addr, struct in_ifaddr *ifa)
119{
120 return !((addr^ifa->ifa_address)&ifa->ifa_mask);
121}
122
123/*
124 * Check if a mask is acceptable.
125 */
126
127static __inline__ int bad_mask(u32 mask, u32 addr)
128{
129 if (addr & (mask = ~mask))
130 return 1;
131 mask = ntohl(mask);
132 if (mask & (mask+1))
133 return 1;
134 return 0;
135}
136
137#define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
138 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
139
140#define for_ifa(in_dev) { struct in_ifaddr *ifa; \
141 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
142
143
144#define endfor_ifa(in_dev) }
145
146static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
147{
148 struct in_device *in_dev = dev->ip_ptr;
149 if (in_dev)
150 in_dev = rcu_dereference(in_dev);
151 return in_dev;
152}
153
154static __inline__ struct in_device *
155in_dev_get(const struct net_device *dev)
156{
157 struct in_device *in_dev;
158
159 rcu_read_lock();
160 in_dev = __in_dev_get_rcu(dev);
161 if (in_dev)
162 atomic_inc(&in_dev->refcnt);
163 rcu_read_unlock();
164 return in_dev;
165}
166
167static __inline__ struct in_device *
168__in_dev_get_rtnl(const struct net_device *dev)
169{
170 return (struct in_device*)dev->ip_ptr;
171}
172
173extern void in_dev_finish_destroy(struct in_device *idev);
174
175static inline void in_dev_put(struct in_device *idev)
176{
177 if (atomic_dec_and_test(&idev->refcnt))
178 in_dev_finish_destroy(idev);
179}
180
181#define __in_dev_put(idev) atomic_dec(&(idev)->refcnt)
182#define in_dev_hold(idev) atomic_inc(&(idev)->refcnt)
183
184#endif /* __KERNEL__ */
185
186static __inline__ __u32 inet_make_mask(int logmask)
187{
188 if (logmask)
189 return htonl(~((1<<(32-logmask))-1));
190 return 0;
191}
192
193static __inline__ int inet_mask_len(__u32 mask)
194{
195 if (!(mask = ntohl(mask)))
196 return 0;
197 return 32 - ffz(~mask);
198}
199
200
201#endif /* _LINUX_INETDEVICE_H */