1 #ifndef _LINUX_INETDEVICE_H 2 #define _LINUX_INETDEVICE_H 3 4 #ifdef __KERNEL__ 5 6 #include <linux/if.h> 7 #include <linux/netdevice.h> 8 #include <linux/rcupdate.h> 9 #include <linux/timer.h> 10 11 struct ipv4_devconf 12 { 13 int accept_redirects; 14 int send_redirects; 15 int secure_redirects; 16 int shared_media; 17 int accept_source_route; 18 int rp_filter; 19 int proxy_arp; 20 int bootp_relay; 21 int log_martians; 22 int forwarding; 23 int mc_forwarding; 24 int tag; 25 int arp_filter; 26 int arp_announce; 27 int arp_ignore; 28 int medium_id; 29 int no_xfrm; 30 int no_policy; 31 int force_igmp_version; 32 void *sysctl; 33 }; 34 35 extern struct ipv4_devconf ipv4_devconf; 36 37 struct in_device 38 { 39 struct net_device *dev; 40 atomic_t refcnt; 41 int dead; 42 struct in_ifaddr *ifa_list; /* IP ifaddr chain */ 43 rwlock_t mc_list_lock; 44 struct ip_mc_list *mc_list; /* IP multicast filter chain */ 45 spinlock_t mc_tomb_lock; 46 struct ip_mc_list *mc_tomb; 47 unsigned long mr_v1_seen; 48 unsigned long mr_v2_seen; 49 unsigned long mr_maxdelay; 50 unsigned char mr_qrv; 51 unsigned char mr_gq_running; 52 unsigned char mr_ifc_count; 53 struct timer_list mr_gq_timer; /* general query timer */ 54 struct timer_list mr_ifc_timer; /* interface change timer */ 55 56 struct neigh_parms *arp_parms; 57 struct ipv4_devconf cnf; 58 struct rcu_head rcu_head; 59 }; 60 61 #define IN_DEV_FORWARD(in_dev) ((in_dev)->cnf.forwarding) 62 #define IN_DEV_MFORWARD(in_dev) (ipv4_devconf.mc_forwarding && (in_dev)->cnf.mc_forwarding) 63 #define IN_DEV_RPFILTER(in_dev) (ipv4_devconf.rp_filter && (in_dev)->cnf.rp_filter) 64 #define IN_DEV_SOURCE_ROUTE(in_dev) (ipv4_devconf.accept_source_route && (in_dev)->cnf.accept_source_route) 65 #define IN_DEV_BOOTP_RELAY(in_dev) (ipv4_devconf.bootp_relay && (in_dev)->cnf.bootp_relay) 66 67 #define IN_DEV_LOG_MARTIANS(in_dev) (ipv4_devconf.log_martians || (in_dev)->cnf.log_martians) 68 #define IN_DEV_PROXY_ARP(in_dev) (ipv4_devconf.proxy_arp || (in_dev)->cnf.proxy_arp) 69 #define IN_DEV_SHARED_MEDIA(in_dev) (ipv4_devconf.shared_media || (in_dev)->cnf.shared_media) 70 #define IN_DEV_TX_REDIRECTS(in_dev) (ipv4_devconf.send_redirects || (in_dev)->cnf.send_redirects) 71 #define IN_DEV_SEC_REDIRECTS(in_dev) (ipv4_devconf.secure_redirects || (in_dev)->cnf.secure_redirects) 72 #define IN_DEV_IDTAG(in_dev) ((in_dev)->cnf.tag) 73 #define IN_DEV_MEDIUM_ID(in_dev) ((in_dev)->cnf.medium_id) 74 75 #define IN_DEV_RX_REDIRECTS(in_dev) \ 76 ((IN_DEV_FORWARD(in_dev) && \ 77 (ipv4_devconf.accept_redirects && (in_dev)->cnf.accept_redirects)) \ 78 || (!IN_DEV_FORWARD(in_dev) && \ 79 (ipv4_devconf.accept_redirects || (in_dev)->cnf.accept_redirects))) 80 81 #define IN_DEV_ARPFILTER(in_dev) (ipv4_devconf.arp_filter || (in_dev)->cnf.arp_filter) 82 #define IN_DEV_ARP_ANNOUNCE(in_dev) (max(ipv4_devconf.arp_announce, (in_dev)->cnf.arp_announce)) 83 #define IN_DEV_ARP_IGNORE(in_dev) (max(ipv4_devconf.arp_ignore, (in_dev)->cnf.arp_ignore)) 84 85 struct in_ifaddr 86 { 87 struct in_ifaddr *ifa_next; 88 struct in_device *ifa_dev; 89 struct rcu_head rcu_head; 90 u32 ifa_local; 91 u32 ifa_address; 92 u32 ifa_mask; 93 u32 ifa_broadcast; 94 u32 ifa_anycast; 95 unsigned char ifa_scope; 96 unsigned char ifa_flags; 97 unsigned char ifa_prefixlen; 98 char ifa_label[IFNAMSIZ]; 99 }; 100 101 extern int register_inetaddr_notifier(struct notifier_block *nb); 102 extern int unregister_inetaddr_notifier(struct notifier_block *nb); 103 104 extern struct net_device *ip_dev_find(u32 addr); 105 extern int inet_addr_onlink(struct in_device *in_dev, u32 a, u32 b); 106 extern int devinet_ioctl(unsigned int cmd, void __user *); 107 extern void devinet_init(void); 108 extern struct in_device *inetdev_init(struct net_device *dev); 109 extern struct in_device *inetdev_by_index(int); 110 extern u32 inet_select_addr(const struct net_device *dev, u32 dst, int scope); 111 extern u32 inet_confirm_addr(const struct net_device *dev, u32 dst, u32 local, int scope); 112 extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, u32 prefix, u32 mask); 113 extern void inet_forward_change(void); 114 115 static __inline__ int inet_ifa_match(u32 addr, struct in_ifaddr *ifa) 116 { 117 return !((addr^ifa->ifa_address)&ifa->ifa_mask); 118 } 119 120 /* 121 * Check if a mask is acceptable. 122 */ 123 124 static __inline__ int bad_mask(u32 mask, u32 addr) 125 { 126 if (addr & (mask = ~mask)) 127 return 1; 128 mask = ntohl(mask); 129 if (mask & (mask+1)) 130 return 1; 131 return 0; 132 } 133 134 #define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \ 135 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next) 136 137 #define for_ifa(in_dev) { struct in_ifaddr *ifa; \ 138 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next) 139 140 141 #define endfor_ifa(in_dev) } 142 143 static __inline__ struct in_device * 144 in_dev_get(const struct net_device *dev) 145 { 146 struct in_device *in_dev; 147 148 rcu_read_lock(); 149 in_dev = dev->ip_ptr; 150 if (in_dev) 151 atomic_inc(&in_dev->refcnt); 152 rcu_read_unlock(); 153 return in_dev; 154 } 155 156 static __inline__ struct in_device * 157 __in_dev_get(const struct net_device *dev) 158 { 159 return (struct in_device*)dev->ip_ptr; 160 } 161 162 extern void in_dev_finish_destroy(struct in_device *idev); 163 164 static inline void in_dev_put(struct in_device *idev) 165 { 166 if (atomic_dec_and_test(&idev->refcnt)) 167 in_dev_finish_destroy(idev); 168 } 169 170 #define __in_dev_put(idev) atomic_dec(&(idev)->refcnt) 171 #define in_dev_hold(idev) atomic_inc(&(idev)->refcnt) 172 173 #endif /* __KERNEL__ */ 174 175 static __inline__ __u32 inet_make_mask(int logmask) 176 { 177 if (logmask) 178 return htonl(~((1<<(32-logmask))-1)); 179 return 0; 180 } 181 182 static __inline__ int inet_mask_len(__u32 mask) 183 { 184 if (!(mask = ntohl(mask))) 185 return 0; 186 return 32 - ffz(~mask); 187 } 188 189 190 #endif /* _LINUX_INETDEVICE_H */ 191