277 lines
8.4 KiB
C
277 lines
8.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_INETDEVICE_H
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#define _LINUX_INETDEVICE_H
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#ifdef __KERNEL__
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#include <linux/bitmap.h>
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#include <linux/if.h>
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#include <linux/ip.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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#include <linux/sysctl.h>
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#include <linux/rtnetlink.h>
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#include <linux/refcount.h>
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struct ipv4_devconf {
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void *sysctl;
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int data[IPV4_DEVCONF_MAX];
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DECLARE_BITMAP(state, IPV4_DEVCONF_MAX);
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};
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#define MC_HASH_SZ_LOG 9
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struct in_device {
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struct net_device *dev;
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refcount_t refcnt;
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int dead;
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struct in_ifaddr *ifa_list; /* IP ifaddr chain */
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struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */
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struct ip_mc_list __rcu * __rcu *mc_hash;
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int mc_count; /* Number of installed mcasts */
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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 long mr_qi; /* Query Interval */
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unsigned long mr_qri; /* Query Response Interval */
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unsigned char mr_qrv; /* Query Robustness Variable */
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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 IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1])
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#define IPV4_DEVCONF_ALL(net, attr) \
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IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
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static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
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{
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index--;
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return in_dev->cnf.data[index];
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}
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static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
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int val)
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{
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index--;
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set_bit(index, in_dev->cnf.state);
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in_dev->cnf.data[index] = val;
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}
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static inline void ipv4_devconf_setall(struct in_device *in_dev)
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{
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bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX);
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}
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#define IN_DEV_CONF_GET(in_dev, attr) \
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ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr)
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#define IN_DEV_CONF_SET(in_dev, attr, val) \
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ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val))
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#define IN_DEV_ANDCONF(in_dev, attr) \
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(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
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IN_DEV_CONF_GET((in_dev), attr))
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#define IN_DEV_NET_ORCONF(in_dev, net, attr) \
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(IPV4_DEVCONF_ALL(net, attr) || \
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IN_DEV_CONF_GET((in_dev), attr))
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#define IN_DEV_ORCONF(in_dev, attr) \
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IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr)
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#define IN_DEV_MAXCONF(in_dev, attr) \
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(max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
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IN_DEV_CONF_GET((in_dev), attr)))
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#define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
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#define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
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#define IN_DEV_BFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), BC_FORWARDING)
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#define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
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#define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK)
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#define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
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ACCEPT_SOURCE_ROUTE)
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#define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
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#define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
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#define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
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#define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
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#define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN)
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#define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
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#define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
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#define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
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SECURE_REDIRECTS)
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#define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
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#define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
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#define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
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IN_DEV_ORCONF((in_dev), \
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PROMOTE_SECONDARIES)
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#define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET)
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#define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \
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IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET)
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#define IN_DEV_RX_REDIRECTS(in_dev) \
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((IN_DEV_FORWARD(in_dev) && \
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IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
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|| (!IN_DEV_FORWARD(in_dev) && \
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IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
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#define IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) \
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IN_DEV_CONF_GET((in_dev), IGNORE_ROUTES_WITH_LINKDOWN)
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#define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
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#define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT)
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#define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
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#define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
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#define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
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struct in_ifaddr {
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struct hlist_node hash;
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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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__be32 ifa_local;
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__be32 ifa_address;
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__be32 ifa_mask;
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__u32 ifa_rt_priority;
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__be32 ifa_broadcast;
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unsigned char ifa_scope;
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unsigned char ifa_prefixlen;
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__u32 ifa_flags;
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char ifa_label[IFNAMSIZ];
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/* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
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__u32 ifa_valid_lft;
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__u32 ifa_preferred_lft;
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unsigned long ifa_cstamp; /* created timestamp */
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unsigned long ifa_tstamp; /* updated timestamp */
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};
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struct in_validator_info {
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__be32 ivi_addr;
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struct in_device *ivi_dev;
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struct netlink_ext_ack *extack;
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};
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int register_inetaddr_notifier(struct notifier_block *nb);
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int unregister_inetaddr_notifier(struct notifier_block *nb);
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int register_inetaddr_validator_notifier(struct notifier_block *nb);
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int unregister_inetaddr_validator_notifier(struct notifier_block *nb);
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void inet_netconf_notify_devconf(struct net *net, int event, int type,
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int ifindex, struct ipv4_devconf *devconf);
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struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref);
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static inline struct net_device *ip_dev_find(struct net *net, __be32 addr)
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{
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return __ip_dev_find(net, addr, true);
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}
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int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
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int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *);
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void devinet_init(void);
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struct in_device *inetdev_by_index(struct net *, int);
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__be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
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__be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, __be32 dst,
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__be32 local, int scope);
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struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix,
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__be32 mask);
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struct in_ifaddr *inet_lookup_ifaddr_rcu(struct net *net, __be32 addr);
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static __inline__ bool inet_ifa_match(__be32 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__ bool bad_mask(__be32 mask, __be32 addr)
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{
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__u32 hmask;
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if (addr & (mask = ~mask))
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return true;
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hmask = ntohl(mask);
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if (hmask & (hmask+1))
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return true;
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return false;
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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 *__in_dev_get_rcu(const struct net_device *dev)
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{
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return rcu_dereference(dev->ip_ptr);
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}
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static inline struct in_device *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 = __in_dev_get_rcu(dev);
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if (in_dev)
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refcount_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 *__in_dev_get_rtnl(const struct net_device *dev)
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{
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return rtnl_dereference(dev->ip_ptr);
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}
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static inline struct neigh_parms *__in_dev_arp_parms_get_rcu(const struct net_device *dev)
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{
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struct in_device *in_dev = __in_dev_get_rcu(dev);
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return in_dev ? in_dev->arp_parms : NULL;
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}
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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 (refcount_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) refcount_dec(&(idev)->refcnt)
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#define in_dev_hold(idev) refcount_inc(&(idev)->refcnt)
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#endif /* __KERNEL__ */
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static __inline__ __be32 inet_make_mask(int logmask)
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{
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if (logmask)
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return htonl(~((1U<<(32-logmask))-1));
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return 0;
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}
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static __inline__ int inet_mask_len(__be32 mask)
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{
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__u32 hmask = ntohl(mask);
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if (!hmask)
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return 0;
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return 32 - ffz(~hmask);
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}
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#endif /* _LINUX_INETDEVICE_H */
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