Annotation of embedaddon/bird/nest/iface.h, revision 1.1.1.1

1.1       misho       1: /*
                      2:  *     BIRD Internet Routing Daemon -- Network Interfaces
                      3:  *
                      4:  *     (c) 1998--2000 Martin Mares <mj@ucw.cz>
                      5:  *
                      6:  *     Can be freely distributed and used under the terms of the GNU GPL.
                      7:  */
                      8: 
                      9: #ifndef _BIRD_IFACE_H_
                     10: #define _BIRD_IFACE_H_
                     11: 
                     12: #include "lib/lists.h"
                     13: 
                     14: extern list iface_list;
                     15: 
                     16: struct proto;
                     17: struct pool;
                     18: 
                     19: struct ifa {                           /* Interface address */
                     20:   node n;
                     21:   struct iface *iface;                 /* Interface this address belongs to */
                     22:   ip_addr ip;                          /* IP address of this host */
                     23:   ip_addr prefix;                      /* Network prefix */
                     24:   unsigned pxlen;                      /* Prefix length */
                     25:   ip_addr brd;                         /* Broadcast address */
                     26:   ip_addr opposite;                    /* Opposite end of a point-to-point link */
                     27:   unsigned scope;                      /* Interface address scope */
                     28:   unsigned flags;                      /* Analogous to iface->flags */
                     29: };
                     30: 
                     31: struct iface {
                     32:   node n;
                     33:   char name[16];
                     34:   unsigned flags;
                     35:   unsigned mtu;
                     36:   unsigned index;                      /* OS-dependent interface index */
                     37:   list addrs;                          /* Addresses assigned to this interface */
                     38:   struct ifa *addr;                    /* Primary address */
                     39:   list neighbors;                      /* All neighbors on this interface */
                     40: };
                     41: 
                     42: #define IF_UP 1                                /* IF_ADMIN_UP and IP address known */
                     43: #define IF_MULTIACCESS 2
                     44: #define IF_BROADCAST 4
                     45: #define IF_MULTICAST 8
                     46: #define IF_SHUTDOWN 0x10               /* Interface disappeared */
                     47: #define IF_LOOPBACK 0x20
                     48: #define IF_IGNORE 0x40                 /* Not to be used by routing protocols (loopbacks etc.) */
                     49: #define IF_ADMIN_UP 0x80               /* Administrative up (e.g. IFF_UP in Linux) */
                     50: #define IF_LINK_UP 0x100               /* Link available (e.g. IFF_LOWER_UP in Linux) */
                     51: 
                     52: #define IA_PRIMARY 0x10000             /* This address is primary */
                     53: #define IA_SECONDARY 0x20000           /* This address has been reported as secondary by the kernel */
                     54: #define IA_PEER 0x40000                        /* A peer/ptp address */
                     55: #define IA_HOST 0x80000                        /* A host/loopback address */
                     56: #define IA_FLAGS 0xff0000
                     57: 
                     58: /*
                     59:  * There are three kinds of addresses in BIRD:
                     60:  *  - Standard (prefix-based) addresses, these may define ifa.opposite (for /30 or /31).
                     61:  *  - Peer/ptp addresses, without common prefix for ifa.ip and ifa.opposite.
                     62:  *    ifa.opposite is defined and ifa.prefix/pxlen == ifa.opposite/32 (for simplicity).
                     63:  *  - Host addresses, with ifa.prefix/pxlen == ifa.ip/32 (or /128).
                     64:  *    May be considered a special case of standard addresses.
                     65:  *
                     66:  * Peer addresses (AFAIK) do not exist in IPv6. Linux also supports generalized peer
                     67:  * addresses (with pxlen < 32 and ifa.ip outside prefix), we do not support that.
                     68:  */
                     69: 
                     70: 
                     71: #define IF_JUST_CREATED 0x10000000     /* Send creation event as soon as possible */
                     72: #define IF_TMP_DOWN 0x20000000         /* Temporary shutdown due to interface reconfiguration */
                     73: #define IF_UPDATED 0x40000000          /* Touched in last scan */
                     74: 
                     75: /* Interface change events */
                     76: 
                     77: #define IF_CHANGE_UP 1
                     78: #define IF_CHANGE_DOWN 2
                     79: #define IF_CHANGE_MTU 4
                     80: #define IF_CHANGE_CREATE 8             /* Seen this interface for the first time */
                     81: #define IF_CHANGE_LINK 0x10
                     82: #define IF_CHANGE_TOO_MUCH 0x40000000  /* Used internally */
                     83: 
                     84: void if_init(void);
                     85: void if_dump(struct iface *);
                     86: void if_dump_all(void);
                     87: void ifa_dump(struct ifa *);
                     88: void if_show(void);
                     89: void if_show_summary(void);
                     90: struct iface *if_update(struct iface *);
                     91: void if_delete(struct iface *old);
                     92: struct ifa *ifa_update(struct ifa *);
                     93: void ifa_delete(struct ifa *);
                     94: void if_start_update(void);
                     95: void if_end_partial_update(struct iface *);
                     96: void if_end_update(void);
                     97: void if_flush_ifaces(struct proto *p);
                     98: void if_feed_baby(struct proto *);
                     99: struct iface *if_find_by_index(unsigned);
                    100: struct iface *if_find_by_name(char *);
                    101: struct iface *if_get_by_name(char *);
                    102: void ifa_recalc_all_primary_addresses(void);
                    103: 
                    104: 
                    105: /* The Neighbor Cache */
                    106: 
                    107: typedef struct neighbor {
                    108:   node n;                              /* Node in global neighbor list */
                    109:   node if_n;                           /* Node in per-interface neighbor list */
                    110:   ip_addr addr;                                /* Address of the neighbor */
                    111:   struct ifa *ifa;                     /* Ifa on related iface */
                    112:   struct iface *iface;                 /* Interface it's connected to */
                    113:   struct proto *proto;                 /* Protocol this belongs to */
                    114:   void *data;                          /* Protocol-specific data */
                    115:   unsigned aux;                                /* Protocol-specific data */
                    116:   unsigned flags;
                    117:   int scope;                           /* Address scope, -1 for unreachable sticky neighbors,
                    118:                                           SCOPE_HOST when it's our own address */
                    119: } neighbor;
                    120: 
                    121: #define NEF_STICKY 1
                    122: #define NEF_ONLINK 2
                    123: #define NEF_BIND 4                     /* Used internally for neighbors bound to an iface */
                    124: 
                    125: neighbor *neigh_find(struct proto *, ip_addr *, unsigned flags);
                    126: neighbor *neigh_find2(struct proto *p, ip_addr *a, struct iface *ifa, unsigned flags);
                    127: 
                    128: static inline int neigh_connected_to(struct proto *p, ip_addr *a, struct iface *i)
                    129: {
                    130:   neighbor *n = neigh_find(p, a, 0);
                    131:   return n && n->iface == i;
                    132: }
                    133: 
                    134: void neigh_dump(neighbor *);
                    135: void neigh_dump_all(void);
                    136: void neigh_prune(void);
                    137: void neigh_if_up(struct iface *);
                    138: void neigh_if_down(struct iface *);
                    139: void neigh_if_link(struct iface *);
                    140: void neigh_ifa_update(struct ifa *);
                    141: void neigh_init(struct pool *);
                    142: 
                    143: /*
                    144:  *     Interface Pattern Lists
                    145:  */
                    146: 
                    147: struct iface_patt_node {
                    148:   node n;
                    149:   int positive;
                    150:   byte *pattern;
                    151:   ip_addr prefix;
                    152:   int pxlen;
                    153: };
                    154: 
                    155: struct iface_patt {
                    156:   node n;
                    157:   list ipn_list;                       /* A list of struct iface_patt_node */
                    158: 
                    159:   /* Protocol-specific data follow after this structure */
                    160: };
                    161: 
                    162: int iface_patt_match(struct iface_patt *ifp, struct iface *i, struct ifa *a);
                    163: struct iface_patt *iface_patt_find(list *l, struct iface *i, struct ifa *a);
                    164: int iface_patts_equal(list *, list *, int (*)(struct iface_patt *, struct iface_patt *));
                    165: 
                    166: 
                    167: u32 if_choose_router_id(struct iface_patt *mask, u32 old_id);
                    168: 
                    169: #endif

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>