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