diff options
Diffstat (limited to 'include/linux/inetdevice.h')
| -rw-r--r-- | include/linux/inetdevice.h | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h new file mode 100644 index 00000000000..6fafb27877a --- /dev/null +++ b/include/linux/inetdevice.h @@ -0,0 +1,190 @@ +#ifndef _LINUX_INETDEVICE_H +#define _LINUX_INETDEVICE_H + +#ifdef __KERNEL__ + +#include <linux/if.h> +#include <linux/netdevice.h> +#include <linux/rcupdate.h> +#include <linux/timer.h> + +struct ipv4_devconf +{ + int accept_redirects; + int send_redirects; + int secure_redirects; + int shared_media; + int accept_source_route; + int rp_filter; + int proxy_arp; + int bootp_relay; + int log_martians; + int forwarding; + int mc_forwarding; + int tag; + int arp_filter; + int arp_announce; + int arp_ignore; + int medium_id; + int no_xfrm; + int no_policy; + int force_igmp_version; + void *sysctl; +}; + +extern struct ipv4_devconf ipv4_devconf; + +struct in_device +{ + struct net_device *dev; + atomic_t refcnt; + int dead; + struct in_ifaddr *ifa_list; /* IP ifaddr chain */ + rwlock_t mc_list_lock; + struct ip_mc_list *mc_list; /* IP multicast filter chain */ + spinlock_t mc_tomb_lock; + struct ip_mc_list *mc_tomb; + unsigned long mr_v1_seen; + unsigned long mr_v2_seen; + unsigned long mr_maxdelay; + unsigned char mr_qrv; + unsigned char mr_gq_running; + unsigned char mr_ifc_count; + struct timer_list mr_gq_timer; /* general query timer */ + struct timer_list mr_ifc_timer; /* interface change timer */ + + struct neigh_parms *arp_parms; + struct ipv4_devconf cnf; + struct rcu_head rcu_head; +}; + +#define IN_DEV_FORWARD(in_dev) ((in_dev)->cnf.forwarding) +#define IN_DEV_MFORWARD(in_dev) (ipv4_devconf.mc_forwarding && (in_dev)->cnf.mc_forwarding) +#define IN_DEV_RPFILTER(in_dev) (ipv4_devconf.rp_filter && (in_dev)->cnf.rp_filter) +#define IN_DEV_SOURCE_ROUTE(in_dev) (ipv4_devconf.accept_source_route && (in_dev)->cnf.accept_source_route) +#define IN_DEV_BOOTP_RELAY(in_dev) (ipv4_devconf.bootp_relay && (in_dev)->cnf.bootp_relay) + +#define IN_DEV_LOG_MARTIANS(in_dev) (ipv4_devconf.log_martians || (in_dev)->cnf.log_martians) +#define IN_DEV_PROXY_ARP(in_dev) (ipv4_devconf.proxy_arp || (in_dev)->cnf.proxy_arp) +#define IN_DEV_SHARED_MEDIA(in_dev) (ipv4_devconf.shared_media || (in_dev)->cnf.shared_media) +#define IN_DEV_TX_REDIRECTS(in_dev) (ipv4_devconf.send_redirects || (in_dev)->cnf.send_redirects) +#define IN_DEV_SEC_REDIRECTS(in_dev) (ipv4_devconf.secure_redirects || (in_dev)->cnf.secure_redirects) +#define IN_DEV_IDTAG(in_dev) ((in_dev)->cnf.tag) +#define IN_DEV_MEDIUM_ID(in_dev) ((in_dev)->cnf.medium_id) + +#define IN_DEV_RX_REDIRECTS(in_dev) \ + ((IN_DEV_FORWARD(in_dev) && \ + (ipv4_devconf.accept_redirects && (in_dev)->cnf.accept_redirects)) \ + || (!IN_DEV_FORWARD(in_dev) && \ + (ipv4_devconf.accept_redirects || (in_dev)->cnf.accept_redirects))) + +#define IN_DEV_ARPFILTER(in_dev) (ipv4_devconf.arp_filter || (in_dev)->cnf.arp_filter) +#define IN_DEV_ARP_ANNOUNCE(in_dev) (max(ipv4_devconf.arp_announce, (in_dev)->cnf.arp_announce)) +#define IN_DEV_ARP_IGNORE(in_dev) (max(ipv4_devconf.arp_ignore, (in_dev)->cnf.arp_ignore)) + +struct in_ifaddr +{ + struct in_ifaddr *ifa_next; + struct in_device *ifa_dev; + struct rcu_head rcu_head; + u32 ifa_local; + u32 ifa_address; + u32 ifa_mask; + u32 ifa_broadcast; + u32 ifa_anycast; + unsigned char ifa_scope; + unsigned char ifa_flags; + unsigned char ifa_prefixlen; + char ifa_label[IFNAMSIZ]; +}; + +extern int register_inetaddr_notifier(struct notifier_block *nb); +extern int unregister_inetaddr_notifier(struct notifier_block *nb); + +extern struct net_device *ip_dev_find(u32 addr); +extern int inet_addr_onlink(struct in_device *in_dev, u32 a, u32 b); +extern int devinet_ioctl(unsigned int cmd, void __user *); +extern void devinet_init(void); +extern struct in_device *inetdev_init(struct net_device *dev); +extern struct in_device *inetdev_by_index(int); +extern u32 inet_select_addr(const struct net_device *dev, u32 dst, int scope); +extern u32 inet_confirm_addr(const struct net_device *dev, u32 dst, u32 local, int scope); +extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, u32 prefix, u32 mask); +extern void inet_forward_change(void); + +static __inline__ int inet_ifa_match(u32 addr, struct in_ifaddr *ifa) +{ + return !((addr^ifa->ifa_address)&ifa->ifa_mask); +} + +/* + * Check if a mask is acceptable. + */ + +static __inline__ int bad_mask(u32 mask, u32 addr) +{ + if (addr & (mask = ~mask)) + return 1; + mask = ntohl(mask); + if (mask & (mask+1)) + return 1; + return 0; +} + +#define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \ + for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next) + +#define for_ifa(in_dev) { struct in_ifaddr *ifa; \ + for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next) + + +#define endfor_ifa(in_dev) } + +static __inline__ struct in_device * +in_dev_get(const struct net_device *dev) +{ + struct in_device *in_dev; + + rcu_read_lock(); + in_dev = dev->ip_ptr; + if (in_dev) + atomic_inc(&in_dev->refcnt); + rcu_read_unlock(); + return in_dev; +} + +static __inline__ struct in_device * +__in_dev_get(const struct net_device *dev) +{ + return (struct in_device*)dev->ip_ptr; +} + +extern void in_dev_finish_destroy(struct in_device *idev); + +static inline void in_dev_put(struct in_device *idev) +{ + if (atomic_dec_and_test(&idev->refcnt)) + in_dev_finish_destroy(idev); +} + +#define __in_dev_put(idev) atomic_dec(&(idev)->refcnt) +#define in_dev_hold(idev) atomic_inc(&(idev)->refcnt) + +#endif /* __KERNEL__ */ + +static __inline__ __u32 inet_make_mask(int logmask) +{ + if (logmask) + return htonl(~((1<<(32-logmask))-1)); + return 0; +} + +static __inline__ int inet_mask_len(__u32 mask) +{ + if (!(mask = ntohl(mask))) + return 0; + return 32 - ffz(~mask); +} + + +#endif /* _LINUX_INETDEVICE_H */ |