1#ifndef _LINUX_INETDEVICE_H 2#define _LINUX_INETDEVICE_H 3 4#ifdef __KERNEL__ 5 6#include <linux/bitmap.h> 7#include <linux/if.h> 8#include <linux/netdevice.h> 9#include <linux/rcupdate.h> 10#include <linux/timer.h> 11#include <linux/sysctl.h> 12#include <linux/rtnetlink.h> 13 14enum 15{ 16 IPV4_DEVCONF_FORWARDING=1, 17 IPV4_DEVCONF_MC_FORWARDING, 18 IPV4_DEVCONF_PROXY_ARP, 19 IPV4_DEVCONF_ACCEPT_REDIRECTS, 20 IPV4_DEVCONF_SECURE_REDIRECTS, 21 IPV4_DEVCONF_SEND_REDIRECTS, 22 IPV4_DEVCONF_SHARED_MEDIA, 23 IPV4_DEVCONF_RP_FILTER, 24 IPV4_DEVCONF_ACCEPT_SOURCE_ROUTE, 25 IPV4_DEVCONF_BOOTP_RELAY, 26 IPV4_DEVCONF_LOG_MARTIANS, 27 IPV4_DEVCONF_TAG, 28 IPV4_DEVCONF_ARPFILTER, 29 IPV4_DEVCONF_MEDIUM_ID, 30 IPV4_DEVCONF_NOXFRM, 31 IPV4_DEVCONF_NOPOLICY, 32 IPV4_DEVCONF_FORCE_IGMP_VERSION, 33 IPV4_DEVCONF_ARP_ANNOUNCE, 34 IPV4_DEVCONF_ARP_IGNORE, 35 IPV4_DEVCONF_PROMOTE_SECONDARIES, 36 IPV4_DEVCONF_ARP_ACCEPT, 37 IPV4_DEVCONF_ARP_NOTIFY, 38 IPV4_DEVCONF_ACCEPT_LOCAL, 39 IPV4_DEVCONF_SRC_VMARK, 40 IPV4_DEVCONF_PROXY_ARP_PVLAN, 41 __IPV4_DEVCONF_MAX 42}; 43 44#define IPV4_DEVCONF_MAX (__IPV4_DEVCONF_MAX - 1) 45 46struct ipv4_devconf { 47 void *sysctl; 48 int data[IPV4_DEVCONF_MAX]; 49 DECLARE_BITMAP(state, IPV4_DEVCONF_MAX); 50}; 51 52struct in_device { 53 struct net_device *dev; 54 atomic_t refcnt; 55 int dead; 56 struct in_ifaddr *ifa_list; /* IP ifaddr chain */ 57 struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */ 58 int mc_count; /* Number of installed mcasts */ 59 spinlock_t mc_tomb_lock; 60 struct ip_mc_list *mc_tomb; 61 unsigned long mr_v1_seen; 62 unsigned long mr_v2_seen; 63 unsigned long mr_maxdelay; 64 unsigned char mr_qrv; 65 unsigned char mr_gq_running; 66 unsigned char mr_ifc_count; 67 struct timer_list mr_gq_timer; /* general query timer */ 68 struct timer_list mr_ifc_timer; /* interface change timer */ 69 70 struct neigh_parms *arp_parms; 71 struct ipv4_devconf cnf; 72 struct rcu_head rcu_head; 73}; 74 75#define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1]) 76#define IPV4_DEVCONF_ALL(net, attr) \ 77 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr) 78 79static inline int ipv4_devconf_get(struct in_device *in_dev, int index) 80{ 81 index--; 82 return in_dev->cnf.data[index]; 83} 84 85static inline void ipv4_devconf_set(struct in_device *in_dev, int index, 86 int val) 87{ 88 index--; 89 set_bit(index, in_dev->cnf.state); 90 in_dev->cnf.data[index] = val; 91} 92 93static inline void ipv4_devconf_setall(struct in_device *in_dev) 94{ 95 bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX); 96} 97 98#define IN_DEV_CONF_GET(in_dev, attr) \ 99 ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr) 100#define IN_DEV_CONF_SET(in_dev, attr, val) \ 101 ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val)) 102 103#define IN_DEV_ANDCONF(in_dev, attr) \ 104 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \ 105 IN_DEV_CONF_GET((in_dev), attr)) 106#define IN_DEV_ORCONF(in_dev, attr) \ 107 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) || \ 108 IN_DEV_CONF_GET((in_dev), attr)) 109#define IN_DEV_MAXCONF(in_dev, attr) \ 110 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \ 111 IN_DEV_CONF_GET((in_dev), attr))) 112 113#define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING) 114#define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING) 115#define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER) 116#define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK) 117#define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \ 118 ACCEPT_SOURCE_ROUTE) 119#define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL) 120#define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY) 121 122#define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS) 123#define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP) 124#define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN) 125#define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA) 126#define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS) 127#define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \ 128 SECURE_REDIRECTS) 129#define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG) 130#define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID) 131#define IN_DEV_PROMOTE_SECONDARIES(in_dev) \ 132 IN_DEV_ORCONF((in_dev), \ 133 PROMOTE_SECONDARIES) 134 135#define IN_DEV_RX_REDIRECTS(in_dev) \ 136 ((IN_DEV_FORWARD(in_dev) && \ 137 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \ 138 || (!IN_DEV_FORWARD(in_dev) && \ 139 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS))) 140 141#define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER) 142#define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT) 143#define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE) 144#define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE) 145#define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY) 146 147struct in_ifaddr { 148 struct hlist_node hash; 149 struct in_ifaddr *ifa_next; 150 struct in_device *ifa_dev; 151 struct rcu_head rcu_head; 152 __be32 ifa_local; 153 __be32 ifa_address; 154 __be32 ifa_mask; 155 __be32 ifa_broadcast; 156 unsigned char ifa_scope; 157 unsigned char ifa_flags; 158 unsigned char ifa_prefixlen; 159 char ifa_label[IFNAMSIZ]; 160}; 161 162extern int register_inetaddr_notifier(struct notifier_block *nb); 163extern int unregister_inetaddr_notifier(struct notifier_block *nb); 164 165extern struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref); 166static inline struct net_device *ip_dev_find(struct net *net, __be32 addr) 167{ 168 return __ip_dev_find(net, addr, true); 169} 170 171extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b); 172extern int devinet_ioctl(struct net *net, unsigned int cmd, void __user *); 173extern void devinet_init(void); 174extern struct in_device *inetdev_by_index(struct net *, int); 175extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope); 176extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope); 177extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask); 178 179static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa) 180{ 181 return !((addr^ifa->ifa_address)&ifa->ifa_mask); 182} 183 184/* 185 * Check if a mask is acceptable. 186 */ 187 188static __inline__ int bad_mask(__be32 mask, __be32 addr) 189{ 190 __u32 hmask; 191 if (addr & (mask = ~mask)) 192 return 1; 193 hmask = ntohl(mask); 194 if (hmask & (hmask+1)) 195 return 1; 196 return 0; 197} 198 199#define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \ 200 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next) 201 202#define for_ifa(in_dev) { struct in_ifaddr *ifa; \ 203 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next) 204 205 206#define endfor_ifa(in_dev) } 207 208static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev) 209{ 210 return rcu_dereference(dev->ip_ptr); 211} 212 213static inline struct in_device *in_dev_get(const struct net_device *dev) 214{ 215 struct in_device *in_dev; 216 217 rcu_read_lock(); 218 in_dev = __in_dev_get_rcu(dev); 219 if (in_dev) 220 atomic_inc(&in_dev->refcnt); 221 rcu_read_unlock(); 222 return in_dev; 223} 224 225static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev) 226{ 227 return rtnl_dereference(dev->ip_ptr); 228} 229 230extern void in_dev_finish_destroy(struct in_device *idev); 231 232static inline void in_dev_put(struct in_device *idev) 233{ 234 if (atomic_dec_and_test(&idev->refcnt)) 235 in_dev_finish_destroy(idev); 236} 237 238#define __in_dev_put(idev) atomic_dec(&(idev)->refcnt) 239#define in_dev_hold(idev) atomic_inc(&(idev)->refcnt) 240 241#endif /* __KERNEL__ */ 242 243static __inline__ __be32 inet_make_mask(int logmask) 244{ 245 if (logmask) 246 return htonl(~((1<<(32-logmask))-1)); 247 return 0; 248} 249 250static __inline__ int inet_mask_len(__be32 mask) 251{ 252 __u32 hmask = ntohl(mask); 253 if (!hmask) 254 return 0; 255 return 32 - ffz(~hmask); 256} 257 258 259#endif /* _LINUX_INETDEVICE_H */ 260