lib/if.h

   1 /* Interface related header.
   2  * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published
   8  * by the Free Software Foundation; either version 2, or (at your
   9  * option) any later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef _ZEBRA_IF_H
  22 #define _ZEBRA_IF_H
  23
  24 #include "zebra.h"
  25 #include "linklist.h"
  26 #include "memory.h"
  27 #include "qobj.h"
  28 #include "hook.h"
  29
  30 #ifdef __cplusplus
  31 extern "C" {
  32 #endif
  33
  34 DECLARE_MTYPE(CONNECTED_LABEL)
  35
  36 /* Interface link-layer type, if known. Derived from:
  37  *
  38  * net/if_arp.h on various platforms - Linux especially.
  39  * http://www.iana.org/assignments/arp-parameters/arp-parameters.xhtml
  40  *
  41  * Some of the more obviously defunct technologies left out.
  42  */
  43 enum zebra_link_type {
  44         ZEBRA_LLT_UNKNOWN = 0,
  45         ZEBRA_LLT_ETHER,
  46         ZEBRA_LLT_EETHER,
  47         ZEBRA_LLT_AX25,
  48         ZEBRA_LLT_PRONET,
  49         ZEBRA_LLT_IEEE802,
  50         ZEBRA_LLT_ARCNET,
  51         ZEBRA_LLT_APPLETLK,
  52         ZEBRA_LLT_DLCI,
  53         ZEBRA_LLT_ATM,
  54         ZEBRA_LLT_METRICOM,
  55         ZEBRA_LLT_IEEE1394,
  56         ZEBRA_LLT_EUI64,
  57         ZEBRA_LLT_INFINIBAND,
  58         ZEBRA_LLT_SLIP,
  59         ZEBRA_LLT_CSLIP,
  60         ZEBRA_LLT_SLIP6,
  61         ZEBRA_LLT_CSLIP6,
  62         ZEBRA_LLT_RSRVD,
  63         ZEBRA_LLT_ADAPT,
  64         ZEBRA_LLT_ROSE,
  65         ZEBRA_LLT_X25,
  66         ZEBRA_LLT_PPP,
  67         ZEBRA_LLT_CHDLC,
  68         ZEBRA_LLT_LAPB,
  69         ZEBRA_LLT_RAWHDLC,
  70         ZEBRA_LLT_IPIP,
  71         ZEBRA_LLT_IPIP6,
  72         ZEBRA_LLT_FRAD,
  73         ZEBRA_LLT_SKIP,
  74         ZEBRA_LLT_LOOPBACK,
  75         ZEBRA_LLT_LOCALTLK,
  76         ZEBRA_LLT_FDDI,
  77         ZEBRA_LLT_SIT,
  78         ZEBRA_LLT_IPDDP,
  79         ZEBRA_LLT_IPGRE,
  80         ZEBRA_LLT_IP6GRE,
  81         ZEBRA_LLT_PIMREG,
  82         ZEBRA_LLT_HIPPI,
  83         ZEBRA_LLT_ECONET,
  84         ZEBRA_LLT_IRDA,
  85         ZEBRA_LLT_FCPP,
  86         ZEBRA_LLT_FCAL,
  87         ZEBRA_LLT_FCPL,
  88         ZEBRA_LLT_FCFABRIC,
  89         ZEBRA_LLT_IEEE802_TR,
  90         ZEBRA_LLT_IEEE80211,
  91         ZEBRA_LLT_IEEE80211_RADIOTAP,
  92         ZEBRA_LLT_IEEE802154,
  93         ZEBRA_LLT_IEEE802154_PHY,
  94 };
  95
  96 /*
  97   Interface name length.
  98
  99    Linux define value in /usr/include/linux/if.h.
 100    #define IFNAMSIZ        16
 101
 102    FreeBSD define value in /usr/include/net/if.h.
 103    #define IFNAMSIZ        16
 104 */
 105
 106 #define INTERFACE_NAMSIZ      20
 107 #define INTERFACE_HWADDR_MAX  20
 108
 109 typedef signed int ifindex_t;
 110
 111 #ifdef HAVE_PROC_NET_DEV
 112 struct if_stats {
 113         unsigned long rx_packets;   /* total packets received       */
 114         unsigned long tx_packets;   /* total packets transmitted    */
 115         unsigned long rx_bytes;     /* total bytes received         */
 116         unsigned long tx_bytes;     /* total bytes transmitted      */
 117         unsigned long rx_errors;    /* bad packets received         */
 118         unsigned long tx_errors;    /* packet transmit problems     */
 119         unsigned long rx_dropped;   /* no space in linux buffers    */
 120         unsigned long tx_dropped;   /* no space available in linux  */
 121         unsigned long rx_multicast; /* multicast packets received   */
 122         unsigned long rx_compressed;
 123         unsigned long tx_compressed;
 124         unsigned long collisions;
 125
 126         /* detailed rx_errors: */
 127         unsigned long rx_length_errors;
 128         unsigned long rx_over_errors;   /* receiver ring buff overflow  */
 129         unsigned long rx_crc_errors;    /* recved pkt with crc error    */
 130         unsigned long rx_frame_errors;  /* recv'd frame alignment error */
 131         unsigned long rx_fifo_errors;   /* recv'r fifo overrun          */
 132         unsigned long rx_missed_errors; /* receiver missed packet     */
 133         /* detailed tx_errors */
 134         unsigned long tx_aborted_errors;
 135         unsigned long tx_carrier_errors;
 136         unsigned long tx_fifo_errors;
 137         unsigned long tx_heartbeat_errors;
 138         unsigned long tx_window_errors;
 139 };
 140 #endif /* HAVE_PROC_NET_DEV */
 141
 142 /* Here are "non-official" architectural constants. */
 143 #define TE_EXT_MASK             0x0FFFFFFF
 144 #define TE_EXT_ANORMAL          0x80000000
 145 #define LOSS_PRECISION          0.000003
 146 #define TE_MEGA_BIT             1000000
 147 #define TE_BYTE                 8
 148 #define DEFAULT_BANDWIDTH       10000
 149 #define MAX_CLASS_TYPE          8
 150 #define MAX_PKT_LOSS            50.331642
 151
 152 /*
 153  * Link Parameters Status:
 154  *  equal to 0: unset
 155  *  different from 0: set
 156  */
 157 #define LP_UNSET                0x0000
 158 #define LP_TE_METRIC            0x0001
 159 #define LP_MAX_BW               0x0002
 160 #define LP_MAX_RSV_BW           0x0004
 161 #define LP_UNRSV_BW             0x0008
 162 #define LP_ADM_GRP              0x0010
 163 #define LP_RMT_AS               0x0020
 164 #define LP_DELAY                0x0040
 165 #define LP_MM_DELAY             0x0080
 166 #define LP_DELAY_VAR            0x0100
 167 #define LP_PKT_LOSS             0x0200
 168 #define LP_RES_BW               0x0400
 169 #define LP_AVA_BW               0x0800
 170 #define LP_USE_BW               0x1000
 171
 172 #define IS_PARAM_UNSET(lp, st) !(lp->lp_status & st)
 173 #define IS_PARAM_SET(lp, st) (lp->lp_status & st)
 174 #define IS_LINK_PARAMS_SET(lp) (lp->lp_status != LP_UNSET)
 175
 176 #define SET_PARAM(lp, st) (lp->lp_status) |= (st)
 177 #define UNSET_PARAM(lp, st) (lp->lp_status) &= ~(st)
 178 #define RESET_LINK_PARAM(lp) (lp->lp_status = LP_UNSET)
 179
 180 /* Link Parameters for Traffic Engineering */
 181 struct if_link_params {
 182         uint32_t lp_status; /* Status of Link Parameters: */
 183         uint32_t te_metric; /* Traffic Engineering metric */
 184         float default_bw;
 185         float max_bw;                   /* Maximum Bandwidth */
 186         float max_rsv_bw;               /* Maximum Reservable Bandwidth */
 187         float unrsv_bw[MAX_CLASS_TYPE]; /* Unreserved Bandwidth per Class Type
 188                                            (8) */
 189         uint32_t admin_grp;             /* Administrative group */
 190         uint32_t rmt_as;                /* Remote AS number */
 191         struct in_addr rmt_ip;          /* Remote IP address */
 192         uint32_t av_delay;              /* Link Average Delay */
 193         uint32_t min_delay;             /* Link Min Delay */
 194         uint32_t max_delay;             /* Link Max Delay */
 195         uint32_t delay_var;             /* Link Delay Variation */
 196         float pkt_loss;                 /* Link Packet Loss */
 197         float res_bw;                   /* Residual Bandwidth */
 198         float ava_bw;                   /* Available Bandwidth */
 199         float use_bw;                   /* Utilized Bandwidth */
 200 };
 201
 202 #define INTERFACE_LINK_PARAMS_SIZE   sizeof(struct if_link_params)
 203 #define HAS_LINK_PARAMS(ifp)  ((ifp)->link_params != NULL)
 204
 205 /* Interface structure */
 206 struct interface {
 207         RB_ENTRY(interface) name_entry, index_entry;
 208
 209         /* Interface name.  This should probably never be changed after the
 210            interface is created, because the configuration info for this
 211            interface
 212            is associated with this structure.  For that reason, the interface
 213            should also never be deleted (to avoid losing configuration info).
 214            To delete, just set ifindex to IFINDEX_INTERNAL to indicate that the
 215            interface does not exist in the kernel.
 216          */
 217         char name[INTERFACE_NAMSIZ];
 218
 219         /* Interface index (should be IFINDEX_INTERNAL for non-kernel or
 220            deleted interfaces).
 221            WARNING: the ifindex needs to be changed using the if_set_index()
 222            function. Failure to respect this will cause corruption in the data
 223            structure used to store the interfaces and if_lookup_by_index() will
 224            not work as expected.
 225          */
 226         ifindex_t ifindex;
 227         ifindex_t oldifindex;
 228
 229         /*
 230          * ifindex of parent interface, if any
 231          */
 232         ifindex_t link_ifindex;
 233 #define IFINDEX_INTERNAL        0
 234
 235         /* Zebra internal interface status */
 236         uint8_t status;
 237 #define ZEBRA_INTERFACE_ACTIVE     (1 << 0)
 238 #define ZEBRA_INTERFACE_SUB        (1 << 1)
 239 #define ZEBRA_INTERFACE_LINKDETECTION (1 << 2)
 240 #define ZEBRA_INTERFACE_VRF_LOOPBACK (1 << 3)
 241
 242         /* Interface flags. */
 243         uint64_t flags;
 244
 245         /* Interface metric */
 246         uint32_t metric;
 247
 248         /* Interface Speed in Mb/s */
 249         uint32_t speed;
 250
 251         /* Interface MTU. */
 252         unsigned int mtu; /* IPv4 MTU */
 253         unsigned int
 254                 mtu6; /* IPv6 MTU - probably, but not neccessarily same as mtu
 255                          */
 256
 257         /* Link-layer information and hardware address */
 258         enum zebra_link_type ll_type;
 259         uint8_t hw_addr[INTERFACE_HWADDR_MAX];
 260         int hw_addr_len;
 261
 262         /* interface bandwidth, kbits */
 263         unsigned int bandwidth;
 264
 265         /* Link parameters for Traffic Engineering */
 266         struct if_link_params *link_params;
 267
 268         /* description of the interface. */
 269         char *desc;
 270
 271         /* Distribute list. */
 272         void *distribute_in;
 273         void *distribute_out;
 274
 275         /* Connected address list. */
 276         struct list *connected;
 277
 278         /* Neighbor connected address list. */
 279         struct list *nbr_connected;
 280
 281         /* Daemon specific interface data pointer. */
 282         void *info;
 283
 284         char ptm_enable; /* Should we look at ptm_status ? */
 285         char ptm_status;
 286
 287 /* Statistics fileds. */
 288 #ifdef HAVE_PROC_NET_DEV
 289         struct if_stats stats;
 290 #endif /* HAVE_PROC_NET_DEV */
 291 #ifdef HAVE_NET_RT_IFLIST
 292         struct if_data stats;
 293 #endif /* HAVE_NET_RT_IFLIST */
 294
 295         struct route_node *node;
 296         vrf_id_t vrf_id;
 297
 298         /*
 299          * Has the end users entered `interface XXXX` from the cli in some
 300          * fashion?
 301          */
 302         bool configured;
 303
 304         QOBJ_FIELDS
 305 };
 306
 307 RB_HEAD(if_name_head, interface);
 308 RB_PROTOTYPE(if_name_head, interface, name_entry, if_cmp_func)
 309 RB_HEAD(if_index_head, interface);
 310 RB_PROTOTYPE(if_index_head, interface, index_entry, if_cmp_index_func)
 311 DECLARE_QOBJ_TYPE(interface)
 312
 313 #define IFNAME_RB_INSERT(vrf, ifp)                                                    \
 314         ({                                                                            \
 315                 struct interface *_iz =                                               \
 316                         RB_INSERT(if_name_head, &vrf->ifaces_by_name, (ifp));         \
 317                 if (_iz)                                                              \
 318                         flog_err(                                                     \
 319                                 EC_LIB_INTERFACE,                                     \
 320                                 "%s(%s): corruption detected -- interface with this " \
 321                                 "name exists already in VRF %u!",                     \
 322                                 __func__, (ifp)->name, (ifp)->vrf_id);                \
 323                 _iz;                                                                  \
 324         })
 325
 326 #define IFNAME_RB_REMOVE(vrf, ifp)                                                    \
 327         ({                                                                            \
 328                 struct interface *_iz =                                               \
 329                         RB_REMOVE(if_name_head, &vrf->ifaces_by_name, (ifp));         \
 330                 if (_iz == NULL)                                                      \
 331                         flog_err(                                                     \
 332                                 EC_LIB_INTERFACE,                                     \
 333                                 "%s(%s): corruption detected -- interface with this " \
 334                                 "name doesn't exist in VRF %u!",                      \
 335                                 __func__, (ifp)->name, (ifp)->vrf_id);                \
 336                 _iz;                                                                  \
 337         })
 338
 339
 340 #define IFINDEX_RB_INSERT(vrf, ifp)                                                   \
 341         ({                                                                            \
 342                 struct interface *_iz = RB_INSERT(                                    \
 343                         if_index_head, &vrf->ifaces_by_index, (ifp));                 \
 344                 if (_iz)                                                              \
 345                         flog_err(                                                     \
 346                                 EC_LIB_INTERFACE,                                     \
 347                                 "%s(%u): corruption detected -- interface with this " \
 348                                 "ifindex exists already in VRF %u!",                  \
 349                                 __func__, (ifp)->ifindex, (ifp)->vrf_id);             \
 350                 _iz;                                                                  \
 351         })
 352
 353 #define IFINDEX_RB_REMOVE(vrf, ifp)                                                   \
 354         ({                                                                            \
 355                 struct interface *_iz = RB_REMOVE(                                    \
 356                         if_index_head, &vrf->ifaces_by_index, (ifp));                 \
 357                 if (_iz == NULL)                                                      \
 358                         flog_err(                                                     \
 359                                 EC_LIB_INTERFACE,                                     \
 360                                 "%s(%u): corruption detected -- interface with this " \
 361                                 "ifindex doesn't exist in VRF %u!",                   \
 362                                 __func__, (ifp)->ifindex, (ifp)->vrf_id);             \
 363                 _iz;                                                                  \
 364         })
 365
 366 #define FOR_ALL_INTERFACES(vrf, ifp)                                           \
 367         if (vrf)                                                               \
 368                 RB_FOREACH (ifp, if_name_head, &vrf->ifaces_by_name)
 369
 370 #define FOR_ALL_INTERFACES_ADDRESSES(ifp, connected, node)                     \
 371         for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, connected))
 372
 373 /* called from the library code whenever interfaces are created/deleted
 374  * note: interfaces may not be fully realized at that point; also they
 375  * may not exist in the system (ifindex = IFINDEX_INTERNAL)
 376  *
 377  * priority values are important here, daemons should be at 0 while modules
 378  * can use 1000+ so they run after the daemon has initialised daemon-specific
 379  * interface data
 380  */
 381 DECLARE_HOOK(if_add, (struct interface * ifp), (ifp))
 382 DECLARE_KOOH(if_del, (struct interface * ifp), (ifp))
 383
 384 #define METRIC_MAX (~0)
 385
 386 /* Connected address structure. */
 387 struct connected {
 388         /* Attached interface. */
 389         struct interface *ifp;
 390
 391         /* Flags for configuration. */
 392         uint8_t conf;
 393 #define ZEBRA_IFC_REAL         (1 << 0)
 394 #define ZEBRA_IFC_CONFIGURED   (1 << 1)
 395 #define ZEBRA_IFC_QUEUED       (1 << 2)
 396         /*
 397            The ZEBRA_IFC_REAL flag should be set if and only if this address
 398            exists in the kernel and is actually usable. (A case where it exists
 399            but
 400            is not yet usable would be IPv6 with DAD)
 401            The ZEBRA_IFC_CONFIGURED flag should be set if and only if this
 402            address
 403            was configured by the user from inside quagga.
 404            The ZEBRA_IFC_QUEUED flag should be set if and only if the address
 405            exists
 406            in the kernel. It may and should be set although the address might
 407            not be
 408            usable yet. (compare with ZEBRA_IFC_REAL)
 409          */
 410
 411         /* Flags for connected address. */
 412         uint8_t flags;
 413 #define ZEBRA_IFA_SECONDARY    (1 << 0)
 414 #define ZEBRA_IFA_PEER         (1 << 1)
 415 #define ZEBRA_IFA_UNNUMBERED   (1 << 2)
 416         /* N.B. the ZEBRA_IFA_PEER flag should be set if and only if
 417            a peer address has been configured.  If this flag is set,
 418            the destination field must contain the peer address.
 419          */
 420
 421         /* Address of connected network. */
 422         struct prefix *address;
 423
 424         /* Peer address, if ZEBRA_IFA_PEER is set, otherwise NULL */
 425         struct prefix *destination;
 426
 427         /* Label for Linux 2.2.X and upper. */
 428         char *label;
 429
 430         /*
 431          * Used for setting the connected route's cost. If the metric
 432          * here is set to METRIC_MAX the connected route falls back to
 433          * "struct interface"
 434          */
 435         uint32_t metric;
 436 };
 437
 438 /* Nbr Connected address structure. */
 439 struct nbr_connected {
 440         /* Attached interface. */
 441         struct interface *ifp;
 442
 443         /* Address of connected network. */
 444         struct prefix *address;
 445 };
 446
 447 /* Does the destination field contain a peer address? */
 448 #define CONNECTED_PEER(C) CHECK_FLAG((C)->flags, ZEBRA_IFA_PEER)
 449
 450 /* Prefix to insert into the RIB */
 451 #define CONNECTED_PREFIX(C)                                                    \
 452         (CONNECTED_PEER(C) ? (C)->destination : (C)->address)
 453
 454 /* Identifying address.  We guess that if there's a peer address, but the
 455    local address is in the same prefix, then the local address may be unique. */
 456 #define CONNECTED_ID(C)                                                        \
 457         ((CONNECTED_PEER(C) && !prefix_match((C)->destination, (C)->address))  \
 458                  ? (C)->destination                                            \
 459                  : (C)->address)
 460
 461 /* There are some interface flags which are only supported by some
 462    operating system. */
 463
 464 #ifndef IFF_NOTRAILERS
 465 #define IFF_NOTRAILERS 0x0
 466 #endif /* IFF_NOTRAILERS */
 467 #ifndef IFF_OACTIVE
 468 #define IFF_OACTIVE 0x0
 469 #endif /* IFF_OACTIVE */
 470 #ifndef IFF_SIMPLEX
 471 #define IFF_SIMPLEX 0x0
 472 #endif /* IFF_SIMPLEX */
 473 #ifndef IFF_LINK0
 474 #define IFF_LINK0 0x0
 475 #endif /* IFF_LINK0 */
 476 #ifndef IFF_LINK1
 477 #define IFF_LINK1 0x0
 478 #endif /* IFF_LINK1 */
 479 #ifndef IFF_LINK2
 480 #define IFF_LINK2 0x0
 481 #endif /* IFF_LINK2 */
 482 #ifndef IFF_NOXMIT
 483 #define IFF_NOXMIT 0x0
 484 #endif /* IFF_NOXMIT */
 485 #ifndef IFF_NORTEXCH
 486 #define IFF_NORTEXCH 0x0
 487 #endif /* IFF_NORTEXCH */
 488 #ifndef IFF_IPV4
 489 #define IFF_IPV4 0x0
 490 #endif /* IFF_IPV4 */
 491 #ifndef IFF_IPV6
 492 #define IFF_IPV6 0x0
 493 #endif /* IFF_IPV6 */
 494 #ifndef IFF_VIRTUAL
 495 #define IFF_VIRTUAL 0x0
 496 #endif /* IFF_VIRTUAL */
 497
 498 /* Prototypes. */
 499 extern int if_cmp_name_func(const char *p1, const char *p2);
 500
 501 /*
 502  * Passing in VRF_UNKNOWN is a valid thing to do, unless we
 503  * are creating a new interface.
 504  *
 505  * This is useful for vrf route-leaking.  So more than anything
 506  * else think before you use VRF_UNKNOWN
 507  */
 508 extern void if_update_to_new_vrf(struct interface *, vrf_id_t vrf_id);
 509
 510 /* Create new interface, adds to name list only */
 511 extern struct interface *if_create_name(const char *name, vrf_id_t vrf_id);
 512
 513 /* Create new interface, adds to index list only */
 514 extern struct interface *if_create_ifindex(ifindex_t ifindex, vrf_id_t vrf_id);
 515 extern struct interface *if_lookup_by_index(ifindex_t, vrf_id_t vrf_id);
 516 extern struct interface *if_lookup_by_index_all_vrf(ifindex_t);
 517 extern struct interface *if_lookup_exact_address(const void *matchaddr,
 518                                                  int family, vrf_id_t vrf_id);
 519 extern struct connected *if_lookup_address(const void *matchaddr, int family,
 520                                            vrf_id_t vrf_id);
 521 extern struct interface *if_lookup_prefix(const struct prefix *prefix,
 522                                           vrf_id_t vrf_id);
 523 size_t if_lookup_by_hwaddr(const uint8_t *hw_addr, size_t addrsz,
 524                            struct interface ***result, vrf_id_t vrf_id);
 525
 526 struct vrf;
 527 extern struct interface *if_lookup_by_name_all_vrf(const char *ifname);
 528 extern struct interface *if_lookup_by_name_vrf(const char *name, struct vrf *vrf);
 529 extern struct interface *if_lookup_by_name(const char *ifname, vrf_id_t vrf_id);
 530 extern struct interface *if_get_by_name(const char *ifname, vrf_id_t vrf_id);
 531 extern struct interface *if_get_by_ifindex(ifindex_t ifindex, vrf_id_t vrf_id);
 532
 533 /* Sets the index and adds to index list */
 534 extern int if_set_index(struct interface *ifp, ifindex_t ifindex);
 535 /* Sets the name and adds to name list */
 536 extern void if_set_name(struct interface *ifp, const char *name);
 537
 538 /* Delete the interface, but do not free the structure, and leave it in the
 539    interface list.  It is often advisable to leave the pseudo interface
 540    structure because there may be configuration information attached. */
 541 extern void if_delete_retain(struct interface *);
 542
 543 /* Delete and free the interface structure: calls if_delete_retain and then
 544    deletes it from the interface list and frees the structure. */
 545 extern void if_delete(struct interface **ifp);
 546
 547 extern int if_is_up(const struct interface *ifp);
 548 extern int if_is_running(const struct interface *ifp);
 549 extern int if_is_operative(const struct interface *ifp);
 550 extern int if_is_no_ptm_operative(const struct interface *ifp);
 551 extern int if_is_loopback(const struct interface *ifp);
 552 extern int if_is_vrf(const struct interface *ifp);
 553 extern bool if_is_loopback_or_vrf(const struct interface *ifp);
 554 extern int if_is_broadcast(const struct interface *ifp);
 555 extern int if_is_pointopoint(const struct interface *ifp);
 556 extern int if_is_multicast(const struct interface *ifp);
 557 extern void if_terminate(struct vrf *vrf);
 558 extern void if_dump_all(void);
 559 extern const char *if_flag_dump(unsigned long);
 560 extern const char *if_link_type_str(enum zebra_link_type);
 561
 562 /* Please use ifindex2ifname instead of if_indextoname where possible;
 563    ifindex2ifname uses internal interface info, whereas if_indextoname must
 564    make a system call. */
 565 extern const char *ifindex2ifname(ifindex_t, vrf_id_t vrf_id);
 566
 567 /* Please use ifname2ifindex instead of if_nametoindex where possible;
 568    ifname2ifindex uses internal interface info, whereas if_nametoindex must
 569    make a system call. */
 570 extern ifindex_t ifname2ifindex(const char *ifname, vrf_id_t vrf_id);
 571
 572 /* Connected address functions. */
 573 extern struct connected *connected_new(void);
 574 extern void connected_free(struct connected **connected);
 575 extern void connected_add(struct interface *, struct connected *);
 576 extern struct connected *
 577 connected_add_by_prefix(struct interface *, struct prefix *, struct prefix *);
 578 extern struct connected *connected_delete_by_prefix(struct interface *,
 579                                                     struct prefix *);
 580 extern struct connected *connected_lookup_prefix(struct interface *,
 581                                                  const struct prefix *);
 582 extern struct connected *connected_lookup_prefix_exact(struct interface *,
 583                                                        const struct prefix *);
 584 extern unsigned int connected_count_by_family(struct interface *, int family);
 585 extern struct nbr_connected *nbr_connected_new(void);
 586 extern void nbr_connected_free(struct nbr_connected *);
 587 struct nbr_connected *nbr_connected_check(struct interface *, struct prefix *);
 588 struct connected *connected_get_linklocal(struct interface *ifp);
 589
 590 /* link parameters */
 591 struct if_link_params *if_link_params_get(struct interface *);
 592 void if_link_params_free(struct interface *);
 593
 594 /* Northbound. */
 595 extern void if_cmd_init(void);
 596 extern void if_zapi_callbacks(int (*create)(struct interface *ifp),
 597                               int (*up)(struct interface *ifp),
 598                               int (*down)(struct interface *ifp),
 599                               int (*destroy)(struct interface *ifp));
 600
 601 extern void if_new_via_zapi(struct interface *ifp);
 602 extern void if_up_via_zapi(struct interface *ifp);
 603 extern void if_down_via_zapi(struct interface *ifp);
 604 extern void if_destroy_via_zapi(struct interface *ifp);
 605
 606 extern const struct frr_yang_module_info frr_interface_info;
 607
 608 #ifdef __cplusplus
 609 }
 610 #endif
 611
 612 #endif /* _ZEBRA_IF_H */