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