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