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