Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_INETDEVICE_H |
| 2 | #define _LINUX_INETDEVICE_H |
| 3 | |
| 4 | #ifdef __KERNEL__ |
| 5 | |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 6 | #include <linux/bitmap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | #include <linux/if.h> |
| 8 | #include <linux/netdevice.h> |
| 9 | #include <linux/rcupdate.h> |
| 10 | #include <linux/timer.h> |
Satyam Sharma | 8bfe6d6 | 2007-06-22 17:04:27 -0700 | [diff] [blame] | 11 | #include <linux/sysctl.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | |
| 13 | struct ipv4_devconf |
| 14 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | void *sysctl; |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 16 | int data[__NET_IPV4_CONF_MAX - 1]; |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 17 | DECLARE_BITMAP(state, __NET_IPV4_CONF_MAX - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | }; |
| 19 | |
| 20 | extern struct ipv4_devconf ipv4_devconf; |
| 21 | |
| 22 | struct in_device |
| 23 | { |
| 24 | struct net_device *dev; |
| 25 | atomic_t refcnt; |
| 26 | int dead; |
| 27 | struct in_ifaddr *ifa_list; /* IP ifaddr chain */ |
| 28 | rwlock_t mc_list_lock; |
| 29 | struct ip_mc_list *mc_list; /* IP multicast filter chain */ |
| 30 | spinlock_t mc_tomb_lock; |
| 31 | struct ip_mc_list *mc_tomb; |
| 32 | unsigned long mr_v1_seen; |
| 33 | unsigned long mr_v2_seen; |
| 34 | unsigned long mr_maxdelay; |
| 35 | unsigned char mr_qrv; |
| 36 | unsigned char mr_gq_running; |
| 37 | unsigned char mr_ifc_count; |
| 38 | struct timer_list mr_gq_timer; /* general query timer */ |
| 39 | struct timer_list mr_ifc_timer; /* interface change timer */ |
| 40 | |
| 41 | struct neigh_parms *arp_parms; |
| 42 | struct ipv4_devconf cnf; |
| 43 | struct rcu_head rcu_head; |
| 44 | }; |
| 45 | |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 46 | #define IPV4_DEVCONF(cnf, attr) ((cnf).data[NET_IPV4_CONF_ ## attr - 1]) |
Pavel Emelyanov | 586f121 | 2007-12-16 13:32:48 -0800 | [diff] [blame] | 47 | #define IPV4_DEVCONF_ALL(net, attr) \ |
| 48 | IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 50 | static inline int ipv4_devconf_get(struct in_device *in_dev, int index) |
| 51 | { |
| 52 | index--; |
| 53 | return in_dev->cnf.data[index]; |
| 54 | } |
| 55 | |
| 56 | static inline void ipv4_devconf_set(struct in_device *in_dev, int index, |
| 57 | int val) |
| 58 | { |
| 59 | index--; |
Herbert Xu | 31be308 | 2007-06-04 23:35:37 -0700 | [diff] [blame] | 60 | set_bit(index, in_dev->cnf.state); |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 61 | in_dev->cnf.data[index] = val; |
| 62 | } |
| 63 | |
Herbert Xu | 71e27da | 2007-06-04 23:36:06 -0700 | [diff] [blame] | 64 | static inline void ipv4_devconf_setall(struct in_device *in_dev) |
| 65 | { |
| 66 | bitmap_fill(in_dev->cnf.state, __NET_IPV4_CONF_MAX - 1); |
| 67 | } |
| 68 | |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 69 | #define IN_DEV_CONF_GET(in_dev, attr) \ |
| 70 | ipv4_devconf_get((in_dev), NET_IPV4_CONF_ ## attr) |
| 71 | #define IN_DEV_CONF_SET(in_dev, attr, val) \ |
| 72 | ipv4_devconf_set((in_dev), NET_IPV4_CONF_ ## attr, (val)) |
| 73 | |
| 74 | #define IN_DEV_ANDCONF(in_dev, attr) \ |
Pavel Emelyanov | 586f121 | 2007-12-16 13:32:48 -0800 | [diff] [blame] | 75 | (IPV4_DEVCONF_ALL(in_dev->dev->nd_net, attr) && \ |
| 76 | IN_DEV_CONF_GET((in_dev), attr)) |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 77 | #define IN_DEV_ORCONF(in_dev, attr) \ |
Pavel Emelyanov | 586f121 | 2007-12-16 13:32:48 -0800 | [diff] [blame] | 78 | (IPV4_DEVCONF_ALL(in_dev->dev->nd_net, attr) || \ |
| 79 | IN_DEV_CONF_GET((in_dev), attr)) |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 80 | #define IN_DEV_MAXCONF(in_dev, attr) \ |
Pavel Emelyanov | 586f121 | 2007-12-16 13:32:48 -0800 | [diff] [blame] | 81 | (max(IPV4_DEVCONF_ALL(in_dev->dev->nd_net, attr), \ |
| 82 | IN_DEV_CONF_GET((in_dev), attr))) |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 83 | |
| 84 | #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING) |
Pavel Emelyanov | 01ecfe9 | 2007-12-11 02:16:47 -0800 | [diff] [blame] | 85 | #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING) |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 86 | #define IN_DEV_RPFILTER(in_dev) IN_DEV_ANDCONF((in_dev), RP_FILTER) |
| 87 | #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \ |
| 88 | ACCEPT_SOURCE_ROUTE) |
| 89 | #define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY) |
| 90 | |
| 91 | #define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS) |
| 92 | #define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP) |
| 93 | #define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA) |
| 94 | #define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS) |
| 95 | #define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \ |
| 96 | SECURE_REDIRECTS) |
| 97 | #define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG) |
| 98 | #define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID) |
| 99 | #define IN_DEV_PROMOTE_SECONDARIES(in_dev) \ |
| 100 | IN_DEV_ORCONF((in_dev), \ |
| 101 | PROMOTE_SECONDARIES) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | |
| 103 | #define IN_DEV_RX_REDIRECTS(in_dev) \ |
| 104 | ((IN_DEV_FORWARD(in_dev) && \ |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 105 | IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | || (!IN_DEV_FORWARD(in_dev) && \ |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 107 | IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | |
Herbert Xu | 42f811b | 2007-06-04 23:34:44 -0700 | [diff] [blame] | 109 | #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER) |
| 110 | #define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE) |
| 111 | #define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
| 113 | struct in_ifaddr |
| 114 | { |
| 115 | struct in_ifaddr *ifa_next; |
| 116 | struct in_device *ifa_dev; |
| 117 | struct rcu_head rcu_head; |
Al Viro | a144ea4 | 2006-09-28 18:00:55 -0700 | [diff] [blame] | 118 | __be32 ifa_local; |
| 119 | __be32 ifa_address; |
| 120 | __be32 ifa_mask; |
| 121 | __be32 ifa_broadcast; |
| 122 | __be32 ifa_anycast; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | unsigned char ifa_scope; |
| 124 | unsigned char ifa_flags; |
| 125 | unsigned char ifa_prefixlen; |
| 126 | char ifa_label[IFNAMSIZ]; |
| 127 | }; |
| 128 | |
| 129 | extern int register_inetaddr_notifier(struct notifier_block *nb); |
| 130 | extern int unregister_inetaddr_notifier(struct notifier_block *nb); |
| 131 | |
Denis V. Lunev | 1ab3527 | 2008-01-22 22:04:30 -0800 | [diff] [blame^] | 132 | extern struct net_device *ip_dev_find(struct net *net, __be32 addr); |
Al Viro | ff428d7 | 2006-09-26 22:13:35 -0700 | [diff] [blame] | 133 | extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | extern int devinet_ioctl(unsigned int cmd, void __user *); |
| 135 | extern void devinet_init(void); |
Denis V. Lunev | 7fee0ca | 2008-01-21 17:32:38 -0800 | [diff] [blame] | 136 | extern struct in_device *inetdev_by_index(struct net *, int); |
Al Viro | a61ced5 | 2006-09-26 21:27:54 -0700 | [diff] [blame] | 137 | extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope); |
Denis V. Lunev | 9bd85e3 | 2008-01-14 23:05:55 -0800 | [diff] [blame] | 138 | extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope); |
Al Viro | 60cad5d | 2006-09-26 22:17:09 -0700 | [diff] [blame] | 139 | extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
Al Viro | 60cad5d | 2006-09-26 22:17:09 -0700 | [diff] [blame] | 141 | static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | { |
| 143 | return !((addr^ifa->ifa_address)&ifa->ifa_mask); |
| 144 | } |
| 145 | |
| 146 | /* |
| 147 | * Check if a mask is acceptable. |
| 148 | */ |
| 149 | |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 150 | static __inline__ int bad_mask(__be32 mask, __be32 addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | { |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 152 | __u32 hmask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | if (addr & (mask = ~mask)) |
| 154 | return 1; |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 155 | hmask = ntohl(mask); |
| 156 | if (hmask & (hmask+1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | return 1; |
| 158 | return 0; |
| 159 | } |
| 160 | |
| 161 | #define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \ |
| 162 | for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next) |
| 163 | |
| 164 | #define for_ifa(in_dev) { struct in_ifaddr *ifa; \ |
| 165 | for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next) |
| 166 | |
| 167 | |
| 168 | #define endfor_ifa(in_dev) } |
| 169 | |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 170 | static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev) |
| 171 | { |
| 172 | struct in_device *in_dev = dev->ip_ptr; |
| 173 | if (in_dev) |
| 174 | in_dev = rcu_dereference(in_dev); |
| 175 | return in_dev; |
| 176 | } |
| 177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | static __inline__ struct in_device * |
| 179 | in_dev_get(const struct net_device *dev) |
| 180 | { |
| 181 | struct in_device *in_dev; |
| 182 | |
| 183 | rcu_read_lock(); |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 184 | in_dev = __in_dev_get_rcu(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | if (in_dev) |
| 186 | atomic_inc(&in_dev->refcnt); |
| 187 | rcu_read_unlock(); |
| 188 | return in_dev; |
| 189 | } |
| 190 | |
| 191 | static __inline__ struct in_device * |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 192 | __in_dev_get_rtnl(const struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | { |
| 194 | return (struct in_device*)dev->ip_ptr; |
| 195 | } |
| 196 | |
| 197 | extern void in_dev_finish_destroy(struct in_device *idev); |
| 198 | |
| 199 | static inline void in_dev_put(struct in_device *idev) |
| 200 | { |
| 201 | if (atomic_dec_and_test(&idev->refcnt)) |
| 202 | in_dev_finish_destroy(idev); |
| 203 | } |
| 204 | |
| 205 | #define __in_dev_put(idev) atomic_dec(&(idev)->refcnt) |
| 206 | #define in_dev_hold(idev) atomic_inc(&(idev)->refcnt) |
| 207 | |
| 208 | #endif /* __KERNEL__ */ |
| 209 | |
Al Viro | 60cad5d | 2006-09-26 22:17:09 -0700 | [diff] [blame] | 210 | static __inline__ __be32 inet_make_mask(int logmask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | { |
| 212 | if (logmask) |
| 213 | return htonl(~((1<<(32-logmask))-1)); |
| 214 | return 0; |
| 215 | } |
| 216 | |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 217 | static __inline__ int inet_mask_len(__be32 mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | { |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 219 | __u32 hmask = ntohl(mask); |
| 220 | if (!hmask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | return 0; |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 222 | return 32 - ffz(~hmask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | } |
| 224 | |
| 225 | |
| 226 | #endif /* _LINUX_INETDEVICE_H */ |