diff options
Diffstat (limited to 'include/linux/inetdevice.h')
| -rw-r--r-- | include/linux/inetdevice.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h new file mode 100644 index 000000000..5f84c38de --- /dev/null +++ b/include/linux/inetdevice.h @@ -0,0 +1,118 @@ +#ifndef _LINUX_INETDEVICE_H +#define _LINUX_INETDEVICE_H + +/* IPv4 specific flags. They are initialized from global sysctl variables, + when IPv4 is initialized. + */ + +#define IFF_IP_FORWARD 1 +#define IFF_IP_PROXYARP 2 +#define IFF_IP_RXREDIRECTS 4 +#define IFF_IP_TXREDIRECTS 8 +#define IFF_IP_SHAREDMEDIA 0x10 +#define IFF_IP_MFORWARD 0x20 +#define IFF_IP_RPFILTER 0x40 + +#ifdef __KERNEL__ + +struct in_device +{ + struct device *dev; + struct in_ifaddr *ifa_list; /* IP ifaddr chain */ + struct ip_mc_list *mc_list; /* IP multicast filter chain */ + unsigned long mr_v1_seen; + unsigned flags; +}; + + +#define IN_DEV_RPFILTER(in_dev) (ipv4_config.rfc1812_filter && ((in_dev)->flags&IFF_IP_RPFILTER)) +#define IN_DEV_MFORWARD(in_dev) (ipv4_config.multicast_route && ((in_dev)->flags&IFF_IP_MFORWARD)) +#define IN_DEV_PROXY_ARP(in_dev) ((in_dev)->flags&IFF_IP_PROXYARP) + +#if 1 +#define IN_DEV_FORWARD(in_dev) (IS_ROUTER) +#define IN_DEV_RX_REDIRECTS(in_dev) (ipv4_config.accept_redirects) +#define IN_DEV_TX_REDIRECTS(in_dev) (1) +#define IN_DEV_SHARED_MEDIA(in_dev) (ipv4_config.rfc1620_redirects) +#else +#define IN_DEV_FORWARD(in_dev) (ipv4_config.ip_forwarding==1 && ((in_dev)->flags&IFF_IP_FORWARD)) +#define IN_DEV_RX_REDIRECTS(in_dev) ((in_dev)->flags&IFF_IP_RXREDIRECTS) +#define IN_DEV_TX_REDIRECTS(in_dev) ((in_dev)->flags&IFF_IP_TXREDIRECTS) +#define IN_DEV_SHARED_MEDIA(in_dev) ((in_dev)->flags&IFF_IP_SHAREDMEDIA) +#endif + +struct in_ifaddr +{ + struct in_ifaddr *ifa_next; + struct in_device *ifa_dev; + u32 ifa_local; + u32 ifa_address; + u32 ifa_mask; + u32 ifa_broadcast; + u32 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 device *ip_dev_find(u32 addr); +extern struct in_ifaddr *inet_addr_onlink(struct in_device *in_dev, u32 a, u32 b); +extern int devinet_ioctl(unsigned int cmd, void *); +extern void devinet_init(void); +extern struct in_device *inetdev_init(struct device *dev); +extern struct in_device *inetdev_by_index(int); +extern u32 inet_select_addr(struct device *dev, u32 dst, int scope); +extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, u32 prefix, u32 mask); +extern int inet_add_bootp_addr(struct device *dev); +extern void inet_del_bootp_addr(struct device *dev); + +extern __inline__ int inet_ifa_match(u32 addr, struct in_ifaddr *ifa) +{ + return !((addr^ifa->ifa_address)&ifa->ifa_mask); +} + +/* + * Check if a mask is acceptable. + */ + +extern __inline__ int bad_mask(u32 mask, u32 addr) +{ + if (addr & (mask = ~mask)) + return 1; + mask = ntohl(mask); + if (mask & (mask+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) } + +#endif /* __KERNEL__ */ + +extern __inline__ __u32 inet_make_mask(int logmask) +{ + if (logmask) + return htonl(~((1<<(32-logmask))-1)); + return 0; +} + +extern __inline__ int inet_mask_len(__u32 mask) +{ + if (!(mask = ntohl(mask))) + return 0; + return 32 - ffz(~mask); +} + + +#endif /* _LINUX_INETDEVICE_H */ |