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