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