/* * BIRD Internet Routing Daemon -- Network Interfaces * * (c) 1998--1999 Martin Mares <mj@ucw.cz> * * Can be freely distributed and used under the terms of the GNU GPL. */ #ifndef _BIRD_IFACE_H_ #define _BIRD_IFACE_H_ #include "lib/lists.h" extern list iface_list; struct proto; struct pool; struct ifa { /* Interface address */ node n; struct iface *iface; /* Interface this address belongs to */ ip_addr ip; /* IP address of this host */ ip_addr prefix; /* Network prefix */ unsigned pxlen; /* Prefix length */ ip_addr brd; /* Broadcast address */ ip_addr opposite; /* Opposite end of a point-to-point link */ unsigned scope; /* Interface address scope */ unsigned flags; /* Analogous to iface->flags */ }; struct iface { node n; char name[16]; unsigned flags; unsigned mtu; unsigned index; /* OS-dependent interface index */ list addrs; /* Addresses assigned to this interface */ struct ifa *addr; /* Primary address */ list neighbors; /* All neighbors on this interface */ }; #define IF_UP 1 /* IF_LINK_UP and IP address known */ #define IF_MULTIACCESS 2 #define IF_BROADCAST 4 #define IF_MULTICAST 8 #define IF_ADMIN_DOWN 0x10 #define IF_LOOPBACK 0x20 #define IF_IGNORE 0x40 /* Not to be used by routing protocols (loopbacks etc.) */ #define IF_LINK_UP 0x80 #define IA_PRIMARY 0x10000 /* This address is primary */ #define IA_SECONDARY 0x20000 /* This address has been reported as secondary by the kernel */ #define IA_UNNUMBERED 0x40000 /* This address belongs to an unnumbered device */ #define IA_FLAGS 0xff0000 #define IF_JUST_CREATED 0x10000000 /* Send creation event as soon as possible */ #define IF_TMP_DOWN 0x20000000 /* Temporary shutdown due to interface reconfiguration */ #define IF_UPDATED 0x40000000 /* Touched in last scan */ /* Interface change events */ #define IF_CHANGE_UP 1 #define IF_CHANGE_DOWN 2 #define IF_CHANGE_MTU 4 #define IF_CHANGE_CREATE 8 /* Seen this interface for the first time */ #define IF_CHANGE_TOO_MUCH 0x40000000 /* Used internally */ void if_init(void); void if_dump(struct iface *); void if_dump_all(void); void ifa_dump(struct ifa *); void if_show(void); void if_show_summary(void); struct iface *if_update(struct iface *); struct ifa *ifa_update(struct ifa *); void ifa_delete(struct ifa *); void if_start_update(void); void if_end_update(void); void if_end_partial_update(struct iface *); void if_feed_baby(struct proto *); struct iface *if_find_by_index(unsigned); struct iface *if_find_by_name(char *); /* * Neighbor Cache. We hold (direct neighbor, protocol) pairs we've seen * along with pointer to protocol-specific data. * * The primary goal of this cache is to quickly validate all incoming * packets if their have been sent by our neighbors and to notify * protocols about lost neighbors when an interface goes down. * * Anyway, it can also contain `sticky' entries for currently unreachable * addresses which cause notification when the address becomes a neighbor. */ typedef struct neighbor { node n; /* Node in global neighbor list */ node if_n; /* Node in per-interface neighbor list */ ip_addr addr; /* Address of the neighbor */ struct iface *iface; /* Interface it's connected to */ struct proto *proto; /* Protocol this belongs to */ void *data; /* Protocol-specific data */ unsigned aux; /* Protocol-specific data */ unsigned flags; } neighbor; #define NEF_STICKY 1 /* * Find neighbor or return NULL if it doesn't exist. * If you specify flags == NEF_STICKY, a sticky entry is created if the * address is not a neighbor, but NULL can still be returned if the address * given is invalid. */ neighbor *neigh_find(struct proto *, ip_addr *, unsigned flags); static inline int neigh_connected_to(struct proto *p, ip_addr *a, struct iface *i) { neighbor *n = neigh_find(p, a, 0); return n && n->iface == i; } void neigh_dump(neighbor *); void neigh_dump_all(void); void neigh_prune(void); void neigh_if_up(struct iface *); void neigh_if_down(struct iface *); void neigh_init(struct pool *); /* * Interface Pattern Lists */ struct iface_patt { node n; byte *pattern; /* Interface name pattern */ ip_addr prefix; /* Interface prefix */ int pxlen; /* Protocol-specific data follow after this structure */ }; struct iface_patt *iface_patt_match(list *, struct iface *); int iface_patts_equal(list *, list *, int (*)(struct iface_patt *, struct iface_patt *)); #endif