/*
* BIRD Internet Routing Daemon -- Network Interfaces
*
- * (c) 1998--1999 Martin Mares <mj@ucw.cz>
+ * (c) 1998--2000 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
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;
unsigned flags;
unsigned mtu;
unsigned index; /* OS-dependent interface index */
- ip_addr ip; /* IP address of this host (0=unset) */
- 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 */
- struct neighbor *neigh; /* List of neighbors on this interface */
+ unsigned master_index; /* Interface index of master iface */
+ list addrs; /* Addresses assigned to this interface */
+ struct ifa *addr; /* Primary address */
+#ifdef IPV6
+ struct ifa *llv6; /* Selected IPv6 link-local address */
+#endif
+ struct iface *master; /* Master iface (e.g. for VRF) */
+ list neighbors; /* All neighbors on this interface */
};
-#define IF_UP 1 /* IF_LINK_UP, not IF_IGNORE and IP address known */
+#define IF_UP 1 /* IF_ADMIN_UP and IP address known */
#define IF_MULTIACCESS 2
-#define IF_UNNUMBERED 4
-#define IF_BROADCAST 8
-#define IF_MULTICAST 16
-#define IF_TUNNEL 32
-#define IF_ADMIN_DOWN 64
-#define IF_LOOPBACK 128
-#define IF_IGNORE 256
-#define IF_LINK_UP 512
+#define IF_BROADCAST 4
+#define IF_MULTICAST 8
+#define IF_SHUTDOWN 0x10 /* Interface disappeared */
+#define IF_LOOPBACK 0x20
+#define IF_IGNORE 0x40 /* Not to be used by routing protocols (loopbacks etc.) */
+#define IF_ADMIN_UP 0x80 /* Administrative up (e.g. IFF_UP in Linux) */
+#define IF_LINK_UP 0x100 /* Link available (e.g. IFF_LOWER_UP in Linux) */
+
+#define IA_PRIMARY 0x10000 /* This address is primary */
+#define IA_SECONDARY 0x20000 /* This address has been reported as secondary by the kernel */
+#define IA_PEER 0x40000 /* A peer/ptp address */
+#define IA_HOST 0x80000 /* A host/loopback address */
+#define IA_FLAGS 0xff0000
+
+/*
+ * There are three kinds of addresses in BIRD:
+ * - Standard (prefix-based) addresses, these may define ifa.opposite (for /30 or /31).
+ * - Peer/ptp addresses, without common prefix for ifa.ip and ifa.opposite.
+ * ifa.opposite is defined and ifa.prefix/pxlen == ifa.opposite/32 (for simplicity).
+ * - Host addresses, with ifa.prefix/pxlen == ifa.ip/32 (or /128).
+ * May be considered a special case of standard addresses.
+ *
+ * Peer addresses (AFAIK) do not exist in IPv6. Linux also supports generalized peer
+ * addresses (with pxlen < 32 and ifa.ip outside prefix), we do not support that.
+ */
+
+
+#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_FLAGS 4 /* Can be converted to down/up internally */
-#define IF_CHANGE_MTU 8
-#define IF_CHANGE_CREATE 16 /* Seen this interface for the first time */
+#define IF_CHANGE_MTU 4
+#define IF_CHANGE_CREATE 8 /* Seen this interface for the first time */
+#define IF_CHANGE_LINK 0x10
+#define IF_CHANGE_TOO_MUCH 0x40000000 /* Used internally */
void if_init(void);
void if_dump(struct iface *);
void if_dump_all(void);
-void if_update(struct iface *);
+void ifa_dump(struct ifa *);
+void if_show(void);
+void if_show_summary(void);
+struct iface *if_update(struct iface *);
+void if_delete(struct iface *old);
+struct ifa *ifa_update(struct ifa *);
+void ifa_delete(struct ifa *);
void if_start_update(void);
+void if_end_partial_update(struct iface *);
void if_end_update(void);
+void if_flush_ifaces(struct proto *p);
void if_feed_baby(struct proto *);
struct iface *if_find_by_index(unsigned);
+struct iface *if_find_by_name(char *);
+struct iface *if_get_by_name(char *);
+void ifa_recalc_all_primary_addresses(void);
+
+static inline struct ifa *
+ifa_llv6(struct iface *i UNUSED4)
+{
+#ifdef IPV6
+ return i->llv6;
+#else
+ return NULL;
+#endif
+}
-/*
- * 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.
- */
+
+/* The Neighbor Cache */
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 ifa *ifa; /* Ifa on related iface */
struct iface *iface; /* Interface it's connected to */
- struct neighbor *sibling; /* Next in per-device chain */
struct proto *proto; /* Protocol this belongs to */
void *data; /* Protocol-specific data */
+ unsigned aux; /* Protocol-specific data */
unsigned flags;
+ int scope; /* Address scope, -1 for unreachable sticky neighbors,
+ SCOPE_HOST when it's our own address */
} neighbor;
#define NEF_STICKY 1
+#define NEF_ONLINK 2
+#define NEF_BIND 4 /* Used internally for neighbors bound to an iface */
-/*
- * 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);
+neighbor *neigh_find2(struct proto *p, ip_addr *a, struct iface *ifa, 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_if_link(struct iface *);
+void neigh_ifa_update(struct ifa *);
+void neigh_init(struct pool *);
/*
* Interface Pattern Lists
*/
+struct iface_patt_node {
+ node n;
+ int positive;
+ byte *pattern;
+ ip_addr prefix;
+ int pxlen;
+};
+
struct iface_patt {
node n;
- byte *pattern; /* Interface name pattern */
-
- /* Protocol-specific data follow, but keep them like this:
- struct rip_iface_patt {
- struct iface_patt i;
- whatever you (need);
- }
- */
+ list ipn_list; /* A list of struct iface_patt_node */
+
+ /* Protocol-specific data follow after this structure */
};
-struct iface_patt *iface_patt_match(list *, struct iface *);
+int iface_patt_match(struct iface_patt *ifp, struct iface *i, struct ifa *a);
+struct iface_patt *iface_patt_find(list *l, struct iface *i, struct ifa *a);
int iface_patts_equal(list *, list *, int (*)(struct iface_patt *, struct iface_patt *));
+
+u32 if_choose_router_id(struct iface_patt *mask, u32 old_id);
+
#endif
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