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