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 void *sysctl; 15 int data[__NET_IPV4_CONF_MAX - 1]; 16 DECLARE_BITMAP(state, __NET_IPV4_CONF_MAX - 1); 17 }; 18 19 struct in_device { 20 struct net_device *dev; 21 atomic_t refcnt; 22 int dead; 23 struct in_ifaddr *ifa_list; /* IP ifaddr chain */ 24 rwlock_t mc_list_lock; 25 struct ip_mc_list *mc_list; /* IP multicast filter chain */ 26 int mc_count; /* Number of installed mcasts */ 27 spinlock_t mc_tomb_lock; 28 struct ip_mc_list *mc_tomb; 29 unsigned long mr_v1_seen; 30 unsigned long mr_v2_seen; 31 unsigned long mr_maxdelay; 32 unsigned char mr_qrv; 33 unsigned char mr_gq_running; 34 unsigned char mr_ifc_count; 35 struct timer_list mr_gq_timer; /* general query timer */ 36 struct timer_list mr_ifc_timer; /* interface change timer */ 37 38 struct neigh_parms *arp_parms; 39 struct ipv4_devconf cnf; 40 struct rcu_head rcu_head; 41 }; 42 43 #define IPV4_DEVCONF(cnf, attr) ((cnf).data[NET_IPV4_CONF_ ## attr - 1]) 44 #define IPV4_DEVCONF_ALL(net, attr) \ 45 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr) 46 47 static inline int ipv4_devconf_get(struct in_device *in_dev, int index) 48 { 49 index--; 50 return in_dev->cnf.data[index]; 51 } 52 53 static inline void ipv4_devconf_set(struct in_device *in_dev, int index, 54 int val) 55 { 56 index--; 57 set_bit(index, in_dev->cnf.state); 58 in_dev->cnf.data[index] = val; 59 } 60 61 static inline void ipv4_devconf_setall(struct in_device *in_dev) 62 { 63 bitmap_fill(in_dev->cnf.state, __NET_IPV4_CONF_MAX - 1); 64 } 65 66 #define IN_DEV_CONF_GET(in_dev, attr) \ 67 ipv4_devconf_get((in_dev), NET_IPV4_CONF_ ## attr) 68 #define IN_DEV_CONF_SET(in_dev, attr, val) \ 69 ipv4_devconf_set((in_dev), NET_IPV4_CONF_ ## attr, (val)) 70 71 #define IN_DEV_ANDCONF(in_dev, attr) \ 72 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \ 73 IN_DEV_CONF_GET((in_dev), attr)) 74 #define IN_DEV_ORCONF(in_dev, attr) \ 75 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) || \ 76 IN_DEV_CONF_GET((in_dev), attr)) 77 #define IN_DEV_MAXCONF(in_dev, attr) \ 78 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \ 79 IN_DEV_CONF_GET((in_dev), attr))) 80 81 #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING) 82 #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING) 83 #define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER) 84 #define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK) 85 #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \ 86 ACCEPT_SOURCE_ROUTE) 87 #define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL) 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 struct in_ifaddr *ifa_next; 115 struct in_device *ifa_dev; 116 struct rcu_head rcu_head; 117 __be32 ifa_local; 118 __be32 ifa_address; 119 __be32 ifa_mask; 120 __be32 ifa_broadcast; 121 unsigned char ifa_scope; 122 unsigned char ifa_flags; 123 unsigned char ifa_prefixlen; 124 char ifa_label[IFNAMSIZ]; 125 }; 126 127 extern int register_inetaddr_notifier(struct notifier_block *nb); 128 extern int unregister_inetaddr_notifier(struct notifier_block *nb); 129 130 extern struct net_device *ip_dev_find(struct net *net, __be32 addr); 131 extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b); 132 extern int devinet_ioctl(struct net *net, unsigned int cmd, void __user *); 133 extern void devinet_init(void); 134 extern struct in_device *inetdev_by_index(struct net *, int); 135 extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope); 136 extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope); 137 extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask); 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