mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Al Viro](/assets/img/avatar_default.png)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
203 lines
5.8 KiB
C
203 lines
5.8 KiB
C
#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 arp_accept;
|
|
int medium_id;
|
|
int no_xfrm;
|
|
int no_policy;
|
|
int force_igmp_version;
|
|
int promote_secondaries;
|
|
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_PROMOTE_SECONDARIES(in_dev) (ipv4_devconf.promote_secondaries || (in_dev)->cnf.promote_secondaries)
|
|
|
|
#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;
|
|
__be32 ifa_local;
|
|
__be32 ifa_address;
|
|
__be32 ifa_mask;
|
|
__be32 ifa_broadcast;
|
|
__be32 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(__be32 addr);
|
|
extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 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 __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
|
|
extern __be32 inet_confirm_addr(const struct net_device *dev, __be32 dst, __be32 local, int scope);
|
|
extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask);
|
|
extern void inet_forward_change(void);
|
|
|
|
static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
|
|
{
|
|
return !((addr^ifa->ifa_address)&ifa->ifa_mask);
|
|
}
|
|
|
|
/*
|
|
* Check if a mask is acceptable.
|
|
*/
|
|
|
|
static __inline__ int bad_mask(__be32 mask, __be32 addr)
|
|
{
|
|
__u32 hmask;
|
|
if (addr & (mask = ~mask))
|
|
return 1;
|
|
hmask = ntohl(mask);
|
|
if (hmask & (hmask+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_rcu(const struct net_device *dev)
|
|
{
|
|
struct in_device *in_dev = dev->ip_ptr;
|
|
if (in_dev)
|
|
in_dev = rcu_dereference(in_dev);
|
|
return 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 = __in_dev_get_rcu(dev);
|
|
if (in_dev)
|
|
atomic_inc(&in_dev->refcnt);
|
|
rcu_read_unlock();
|
|
return in_dev;
|
|
}
|
|
|
|
static __inline__ struct in_device *
|
|
__in_dev_get_rtnl(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__ __be32 inet_make_mask(int logmask)
|
|
{
|
|
if (logmask)
|
|
return htonl(~((1<<(32-logmask))-1));
|
|
return 0;
|
|
}
|
|
|
|
static __inline__ int inet_mask_len(__be32 mask)
|
|
{
|
|
__u32 hmask = ntohl(mask);
|
|
if (!hmask)
|
|
return 0;
|
|
return 32 - ffz(~hmask);
|
|
}
|
|
|
|
|
|
#endif /* _LINUX_INETDEVICE_H */
|