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 #include <linux/rtnetlink.h> 13 14 enum 15 { 16 IPV4_DEVCONF_FORWARDING=1, 17 IPV4_DEVCONF_MC_FORWARDING, 18 IPV4_DEVCONF_PROXY_ARP, 19 IPV4_DEVCONF_ACCEPT_REDIRECTS, 20 IPV4_DEVCONF_SECURE_REDIRECTS, 21 IPV4_DEVCONF_SEND_REDIRECTS, 22 IPV4_DEVCONF_SHARED_MEDIA, 23 IPV4_DEVCONF_RP_FILTER, 24 IPV4_DEVCONF_ACCEPT_SOURCE_ROUTE, 25 IPV4_DEVCONF_BOOTP_RELAY, 26 IPV4_DEVCONF_LOG_MARTIANS, 27 IPV4_DEVCONF_TAG, 28 IPV4_DEVCONF_ARPFILTER, 29 IPV4_DEVCONF_MEDIUM_ID, 30 IPV4_DEVCONF_NOXFRM, 31 IPV4_DEVCONF_NOPOLICY, 32 IPV4_DEVCONF_FORCE_IGMP_VERSION, 33 IPV4_DEVCONF_ARP_ANNOUNCE, 34 IPV4_DEVCONF_ARP_IGNORE, 35 IPV4_DEVCONF_PROMOTE_SECONDARIES, 36 IPV4_DEVCONF_ARP_ACCEPT, 37 IPV4_DEVCONF_ARP_NOTIFY, 38 IPV4_DEVCONF_ACCEPT_LOCAL, 39 IPV4_DEVCONF_SRC_VMARK, 40 IPV4_DEVCONF_PROXY_ARP_PVLAN, 41 __IPV4_DEVCONF_MAX 42 }; 43 44 #define IPV4_DEVCONF_MAX (__IPV4_DEVCONF_MAX - 1) 45 46 struct ipv4_devconf { 47 void *sysctl; 48 int data[IPV4_DEVCONF_MAX]; 49 DECLARE_BITMAP(state, IPV4_DEVCONF_MAX); 50 }; 51 52 struct in_device { 53 struct net_device *dev; 54 atomic_t refcnt; 55 int dead; 56 struct in_ifaddr *ifa_list; /* IP ifaddr chain */ 57 struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */ 58 int mc_count; /* Number of installed mcasts */ 59 spinlock_t mc_tomb_lock; 60 struct ip_mc_list *mc_tomb; 61 unsigned long mr_v1_seen; 62 unsigned long mr_v2_seen; 63 unsigned long mr_maxdelay; 64 unsigned char mr_qrv; 65 unsigned char mr_gq_running; 66 unsigned char mr_ifc_count; 67 struct timer_list mr_gq_timer; /* general query timer */ 68 struct timer_list mr_ifc_timer; /* interface change timer */ 69 70 struct neigh_parms *arp_parms; 71 struct ipv4_devconf cnf; 72 struct rcu_head rcu_head; 73 }; 74 75 #define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1]) 76 #define IPV4_DEVCONF_ALL(net, attr) \ 77 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr) 78 79 static inline int ipv4_devconf_get(struct in_device *in_dev, int index) 80 { 81 index--; 82 return in_dev->cnf.data[index]; 83 } 84 85 static inline void ipv4_devconf_set(struct in_device *in_dev, int index, 86 int val) 87 { 88 index--; 89 set_bit(index, in_dev->cnf.state); 90 in_dev->cnf.data[index] = val; 91 } 92 93 static inline void ipv4_devconf_setall(struct in_device *in_dev) 94 { 95 bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX); 96 } 97 98 #define IN_DEV_CONF_GET(in_dev, attr) \ 99 ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr) 100 #define IN_DEV_CONF_SET(in_dev, attr, val) \ 101 ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val)) 102 103 #define IN_DEV_ANDCONF(in_dev, attr) \ 104 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \ 105 IN_DEV_CONF_GET((in_dev), attr)) 106 #define IN_DEV_ORCONF(in_dev, attr) \ 107 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) || \ 108 IN_DEV_CONF_GET((in_dev), attr)) 109 #define IN_DEV_MAXCONF(in_dev, attr) \ 110 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \ 111 IN_DEV_CONF_GET((in_dev), attr))) 112 113 #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING) 114 #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING) 115 #define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER) 116 #define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK) 117 #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \ 118 ACCEPT_SOURCE_ROUTE) 119 #define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL) 120 #define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY) 121 122 #define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS) 123 #define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP) 124 #define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN) 125 #define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA) 126 #define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS) 127 #define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \ 128 SECURE_REDIRECTS) 129 #define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG) 130 #define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID) 131 #define IN_DEV_PROMOTE_SECONDARIES(in_dev) \ 132 IN_DEV_ORCONF((in_dev), \ 133 PROMOTE_SECONDARIES) 134 135 #define IN_DEV_RX_REDIRECTS(in_dev) \ 136 ((IN_DEV_FORWARD(in_dev) && \ 137 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \ 138 || (!IN_DEV_FORWARD(in_dev) && \ 139 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS))) 140 141 #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER) 142 #define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE) 143 #define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE) 144 #define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY) 145 146 struct in_ifaddr { 147 struct hlist_node hash; 148 struct in_ifaddr *ifa_next; 149 struct in_device *ifa_dev; 150 struct rcu_head rcu_head; 151 __be32 ifa_local; 152 __be32 ifa_address; 153 __be32 ifa_mask; 154 __be32 ifa_broadcast; 155 unsigned char ifa_scope; 156 unsigned char ifa_flags; 157 unsigned char ifa_prefixlen; 158 char ifa_label[IFNAMSIZ]; 159 }; 160 161 extern int register_inetaddr_notifier(struct notifier_block *nb); 162 extern int unregister_inetaddr_notifier(struct notifier_block *nb); 163 164 extern struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref); 165 static inline struct net_device *ip_dev_find(struct net *net, __be32 addr) 166 { 167 return __ip_dev_find(net, addr, true); 168 } 169 170 extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b); 171 extern int devinet_ioctl(struct net *net, unsigned int cmd, void __user *); 172 extern void devinet_init(void); 173 extern struct in_device *inetdev_by_index(struct net *, int); 174 extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope); 175 extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope); 176 extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask); 177 178 static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa) 179 { 180 return !((addr^ifa->ifa_address)&ifa->ifa_mask); 181 } 182 183 /* 184 * Check if a mask is acceptable. 185 */ 186 187 static __inline__ int bad_mask(__be32 mask, __be32 addr) 188 { 189 __u32 hmask; 190 if (addr & (mask = ~mask)) 191 return 1; 192 hmask = ntohl(mask); 193 if (hmask & (hmask+1)) 194 return 1; 195 return 0; 196 } 197 198 #define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \ 199 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next) 200 201 #define for_ifa(in_dev) { struct in_ifaddr *ifa; \ 202 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next) 203 204 205 #define endfor_ifa(in_dev) } 206 207 static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev) 208 { 209 return rcu_dereference(dev->ip_ptr); 210 } 211 212 static inline struct in_device *in_dev_get(const struct net_device *dev) 213 { 214 struct in_device *in_dev; 215 216 rcu_read_lock(); 217 in_dev = __in_dev_get_rcu(dev); 218 if (in_dev) 219 atomic_inc(&in_dev->refcnt); 220 rcu_read_unlock(); 221 return in_dev; 222 } 223 224 static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev) 225 { 226 return rtnl_dereference(dev->ip_ptr); 227 } 228 229 extern void in_dev_finish_destroy(struct in_device *idev); 230 231 static inline void in_dev_put(struct in_device *idev) 232 { 233 if (atomic_dec_and_test(&idev->refcnt)) 234 in_dev_finish_destroy(idev); 235 } 236 237 #define __in_dev_put(idev) atomic_dec(&(idev)->refcnt) 238 #define in_dev_hold(idev) atomic_inc(&(idev)->refcnt) 239 240 #endif /* __KERNEL__ */ 241 242 static __inline__ __be32 inet_make_mask(int logmask) 243 { 244 if (logmask) 245 return htonl(~((1<<(32-logmask))-1)); 246 return 0; 247 } 248 249 static __inline__ int inet_mask_len(__be32 mask) 250 { 251 __u32 hmask = ntohl(mask); 252 if (!hmask) 253 return 0; 254 return 32 - ffz(~hmask); 255 } 256 257 258 #endif /* _LINUX_INETDEVICE_H */ 259