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