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1da177e4 LT |
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 | ||
11 | struct 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; | |
abd596a4 | 28 | int arp_accept; |
1da177e4 LT |
29 | int medium_id; |
30 | int no_xfrm; | |
31 | int no_policy; | |
32 | int force_igmp_version; | |
8f937c60 | 33 | int promote_secondaries; |
1da177e4 LT |
34 | void *sysctl; |
35 | }; | |
36 | ||
37 | extern struct ipv4_devconf ipv4_devconf; | |
38 | ||
39 | struct 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) | |
8f937c60 | 76 | #define IN_DEV_PROMOTE_SECONDARIES(in_dev) (ipv4_devconf.promote_secondaries || (in_dev)->cnf.promote_secondaries) |
1da177e4 LT |
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 | ||
88 | struct 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 | ||
104 | extern int register_inetaddr_notifier(struct notifier_block *nb); | |
105 | extern int unregister_inetaddr_notifier(struct notifier_block *nb); | |
106 | ||
107 | extern struct net_device *ip_dev_find(u32 addr); | |
108 | extern int inet_addr_onlink(struct in_device *in_dev, u32 a, u32 b); | |
109 | extern int devinet_ioctl(unsigned int cmd, void __user *); | |
110 | extern void devinet_init(void); | |
111 | extern struct in_device *inetdev_init(struct net_device *dev); | |
112 | extern struct in_device *inetdev_by_index(int); | |
113 | extern u32 inet_select_addr(const struct net_device *dev, u32 dst, int scope); | |
114 | extern u32 inet_confirm_addr(const struct net_device *dev, u32 dst, u32 local, int scope); | |
115 | extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, u32 prefix, u32 mask); | |
116 | extern void inet_forward_change(void); | |
117 | ||
118 | static __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 | ||
127 | static __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 | ||
e5ed6399 HX |
146 | static 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 | ||
1da177e4 LT |
154 | static __inline__ struct in_device * |
155 | in_dev_get(const struct net_device *dev) | |
156 | { | |
157 | struct in_device *in_dev; | |
158 | ||
159 | rcu_read_lock(); | |
e5ed6399 | 160 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 LT |
161 | if (in_dev) |
162 | atomic_inc(&in_dev->refcnt); | |
163 | rcu_read_unlock(); | |
164 | return in_dev; | |
165 | } | |
166 | ||
167 | static __inline__ struct in_device * | |
e5ed6399 | 168 | __in_dev_get_rtnl(const struct net_device *dev) |
1da177e4 LT |
169 | { |
170 | return (struct in_device*)dev->ip_ptr; | |
171 | } | |
172 | ||
173 | extern void in_dev_finish_destroy(struct in_device *idev); | |
174 | ||
175 | static 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 | ||
186 | static __inline__ __u32 inet_make_mask(int logmask) | |
187 | { | |
188 | if (logmask) | |
189 | return htonl(~((1<<(32-logmask))-1)); | |
190 | return 0; | |
191 | } | |
192 | ||
193 | static __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 */ |