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