mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-12-22 01:31:55 +00:00
e2ae08694e
Modify protocols to use preferred address change notification instead on depending on hard-reset of interfaces in that case, and remove hard-reset in that case. This avoids issue when e.g. IPv6 protocol restarts interface when IPv4 preferred address changed (as hard-reset is unavoidable and common for whole iface). The patch also fixes a bug when removing last address does not send preferred address change notification.
182 lines
6.0 KiB
C
182 lines
6.0 KiB
C
/*
|
|
* BIRD Internet Routing Daemon -- Network Interfaces
|
|
*
|
|
* (c) 1998--2000 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"
|
|
#include "lib/ip.h"
|
|
|
|
extern list iface_list;
|
|
|
|
struct proto;
|
|
struct pool;
|
|
|
|
struct ifa { /* Interface address */
|
|
node n;
|
|
struct iface *iface; /* Interface this address belongs to */
|
|
net_addr prefix; /* Network prefix */
|
|
ip_addr ip; /* IP address of this host */
|
|
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 */
|
|
unsigned master_index; /* Interface index of master iface */
|
|
struct iface *master; /* Master iface (e.g. for VRF) */
|
|
list addrs; /* Addresses assigned to this interface */
|
|
struct ifa *addr4; /* Primary address for IPv4 */
|
|
struct ifa *addr6; /* Primary address for IPv6 */
|
|
struct ifa *llv6; /* Primary link-local address for IPv6 */
|
|
ip4_addr sysdep; /* Arbitrary IPv4 address for internal sysdep use */
|
|
list neighbors; /* All neighbors on this interface */
|
|
};
|
|
|
|
#define IF_UP 1 /* Currently just IF_ADMIN_UP */
|
|
#define IF_MULTIACCESS 2
|
|
#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 /* Iface touched in last scan */
|
|
#define IF_NEEDS_RECALC 0x80000000 /* Preferred address recalculation is needed */
|
|
#define IF_LOST_ADDR4 0x01000000 /* Preferred address was deleted, notification needed */
|
|
#define IF_LOST_ADDR6 0x02000000
|
|
#define IF_LOST_LLV6 0x04000000
|
|
|
|
#define IA_UPDATED IF_UPDATED /* Address 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_LINK 0x10
|
|
#define IF_CHANGE_ADDR4 0x100 /* Change of iface->addr4 */
|
|
#define IF_CHANGE_ADDR6 0x200 /* ... */
|
|
#define IF_CHANGE_LLV6 0x400
|
|
#define IF_CHANGE_SYSDEP 0x800
|
|
#define IF_CHANGE_TOO_MUCH 0x40000000 /* Used internally */
|
|
|
|
#define IF_CHANGE_UPDOWN (IF_CHANGE_UP | IF_CHANGE_DOWN)
|
|
#define IF_CHANGE_PREFERRED (IF_CHANGE_ADDR4 | IF_CHANGE_ADDR6 | IF_CHANGE_LLV6)
|
|
|
|
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 *);
|
|
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 if_recalc_all_preferred_addresses(void);
|
|
|
|
|
|
/* 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 iface *ifreq; /* Requested iface, NULL for any */
|
|
struct proto *proto; /* Protocol this belongs to */
|
|
void *data; /* Protocol-specific data */
|
|
uint aux; /* Protocol-specific data */
|
|
u16 flags; /* NEF_* flags */
|
|
s16 scope; /* Address scope, -1 for unreachable neighbors,
|
|
SCOPE_HOST when it's our own address */
|
|
} neighbor;
|
|
|
|
#define NEF_STICKY 1
|
|
#define NEF_ONLINK 2
|
|
#define NEF_IFACE 4 /* Entry for whole iface */
|
|
|
|
|
|
neighbor *neigh_find(struct proto *p, ip_addr a, struct iface *ifa, uint flags);
|
|
|
|
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;
|
|
net_addr prefix;
|
|
};
|
|
|
|
struct iface_patt {
|
|
node n;
|
|
list ipn_list; /* A list of struct iface_patt_node */
|
|
|
|
/* Protocol-specific data follow after this structure */
|
|
};
|
|
|
|
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
|