1 #ifndef _LINUX_INETDEVICE_H
2 #define _LINUX_INETDEVICE_H
3
4 #ifdef __KERNEL__
5
6 struct ipv4_devconf
7 {
8 int accept_redirects;
9 int send_redirects;
10 int secure_redirects;
11 int shared_media;
12 int accept_source_route;
13 int rp_filter;
14 int proxy_arp;
15 int bootp_relay;
16 int log_martians;
17 int forwarding;
18 int mc_forwarding;
19 int tag;
20 void *sysctl;
21 };
22
23 extern struct ipv4_devconf ipv4_devconf;
24
25 struct in_device
26 {
27 struct net_device *dev;
28 atomic_t refcnt;
29 rwlock_t lock;
30 int dead;
31 struct in_ifaddr *ifa_list; /* IP ifaddr chain */
32 struct ip_mc_list *mc_list; /* IP multicast filter chain */
33 unsigned long mr_v1_seen;
34 struct neigh_parms *arp_parms;
35 struct ipv4_devconf cnf;
36 };
37
38 #define IN_DEV_FORWARD(in_dev) ((in_dev)->cnf.forwarding)
39 #define IN_DEV_MFORWARD(in_dev) (ipv4_devconf.mc_forwarding && (in_dev)->cnf.mc_forwarding)
40 #define IN_DEV_RPFILTER(in_dev) (ipv4_devconf.rp_filter && (in_dev)->cnf.rp_filter)
41 #define IN_DEV_SOURCE_ROUTE(in_dev) (ipv4_devconf.accept_source_route && (in_dev)->cnf.accept_source_route)
42 #define IN_DEV_BOOTP_RELAY(in_dev) (ipv4_devconf.bootp_relay && (in_dev)->cnf.bootp_relay)
43
44 #define IN_DEV_LOG_MARTIANS(in_dev) (ipv4_devconf.log_martians || (in_dev)->cnf.log_martians)
45 #define IN_DEV_PROXY_ARP(in_dev) (ipv4_devconf.proxy_arp || (in_dev)->cnf.proxy_arp)
46 #define IN_DEV_SHARED_MEDIA(in_dev) (ipv4_devconf.shared_media || (in_dev)->cnf.shared_media)
47 #define IN_DEV_TX_REDIRECTS(in_dev) (ipv4_devconf.send_redirects || (in_dev)->cnf.send_redirects)
48 #define IN_DEV_SEC_REDIRECTS(in_dev) (ipv4_devconf.secure_redirects || (in_dev)->cnf.secure_redirects)
49 #define IN_DEV_IDTAG(in_dev) ((in_dev)->cnf.tag)
50
51 #define IN_DEV_RX_REDIRECTS(in_dev) \
52 ((IN_DEV_FORWARD(in_dev) && \
53 (ipv4_devconf.accept_redirects && (in_dev)->cnf.accept_redirects)) \
54 || (!IN_DEV_FORWARD(in_dev) && \
55 (ipv4_devconf.accept_redirects || (in_dev)->cnf.accept_redirects)))
56
57 struct in_ifaddr
58 {
59 struct in_ifaddr *ifa_next;
60 struct in_device *ifa_dev;
61 u32 ifa_local;
62 u32 ifa_address;
63 u32 ifa_mask;
64 u32 ifa_broadcast;
65 u32 ifa_anycast;
66 unsigned char ifa_scope;
67 unsigned char ifa_flags;
68 unsigned char ifa_prefixlen;
69 char ifa_label[IFNAMSIZ];
70 };
71
72 extern int register_inetaddr_notifier(struct notifier_block *nb);
73 extern int unregister_inetaddr_notifier(struct notifier_block *nb);
74
75 extern struct net_device *ip_dev_find(u32 addr);
76 extern int inet_addr_onlink(struct in_device *in_dev, u32 a, u32 b);
77 extern int devinet_ioctl(unsigned int cmd, void *);
78 extern void devinet_init(void);
79 extern struct in_device *inetdev_init(struct net_device *dev);
80 extern struct in_device *inetdev_by_index(int);
81 extern u32 inet_select_addr(const struct net_device *dev, u32 dst, int scope);
82 extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, u32 prefix, u32 mask);
83 extern void inet_forward_change(void);
84
85 extern __inline__ int inet_ifa_match(u32 addr, struct in_ifaddr *ifa)
86 {
87 return !((addr^ifa->ifa_address)&ifa->ifa_mask);
88 }
89
90 /*
91 * Check if a mask is acceptable.
92 */
93
94 extern __inline__ int bad_mask(u32 mask, u32 addr)
95 {
96 if (addr & (mask = ~mask))
97 return 1;
98 mask = ntohl(mask);
99 if (mask & (mask+1))
100 return 1;
101 return 0;
102 }
103
104 #define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
105 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
106
107 #define for_ifa(in_dev) { struct in_ifaddr *ifa; \
108 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
109
110
111 #define endfor_ifa(in_dev) }
112
113 extern rwlock_t inetdev_lock;
114
115
116 extern __inline__ struct in_device *
117 in_dev_get(const struct net_device *dev)
118 {
119 struct in_device *in_dev;
120
121 read_lock(&inetdev_lock);
122 in_dev = dev->ip_ptr;
123 if (in_dev)
124 atomic_inc(&in_dev->refcnt);
125 read_unlock(&inetdev_lock);
126 return in_dev;
127 }
128
129 extern __inline__ struct in_device *
130 __in_dev_get(const struct net_device *dev)
131 {
132 return (struct in_device*)dev->ip_ptr;
133 }
134
135 extern void in_dev_finish_destroy(struct in_device *idev);
136
137 extern __inline__ void
138 in_dev_put(struct in_device *idev)
139 {
140 if (atomic_dec_and_test(&idev->refcnt))
141 in_dev_finish_destroy(idev);
142 }
143
144 #define __in_dev_put(idev) atomic_dec(&(idev)->refcnt)
145 #define in_dev_hold(idev) atomic_inc(&(idev)->refcnt)
146
147 #endif /* __KERNEL__ */
148
149 extern __inline__ __u32 inet_make_mask(int logmask)
150 {
151 if (logmask)
152 return htonl(~((1<<(32-logmask))-1));
153 return 0;
154 }
155
156 extern __inline__ int inet_mask_len(__u32 mask)
157 {
158 if (!(mask = ntohl(mask)))
159 return 0;
160 return 32 - ffz(~mask);
161 }
162
163
164 #endif /* _LINUX_INETDEVICE_H */
165
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