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_KILO_BIT             1000
 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         /*
 228          * ifindex of parent interface, if any
 229          */
 230         ifindex_t link_ifindex;
 231 #define IFINDEX_INTERNAL        0
 232
 233         /* Zebra internal interface status */
 234         uint8_t status;
 235 #define ZEBRA_INTERFACE_ACTIVE     (1 << 0)
 236 #define ZEBRA_INTERFACE_SUB        (1 << 1)
 237 #define ZEBRA_INTERFACE_LINKDETECTION (1 << 2)
 238 #define ZEBRA_INTERFACE_VRF_LOOPBACK (1 << 3)
 239
 240         /* Interface flags. */
 241         uint64_t flags;
 242
 243         /* Interface metric */
 244         uint32_t metric;
 245
 246         /* Interface Speed in Mb/s */
 247         uint32_t speed;
 248
 249         /* Interface MTU. */
 250         unsigned int mtu; /* IPv4 MTU */
 251         unsigned int
 252                 mtu6; /* IPv6 MTU - probably, but not neccessarily same as mtu
 253                          */
 254
 255         /* Link-layer information and hardware address */
 256         enum zebra_link_type ll_type;
 257         uint8_t hw_addr[INTERFACE_HWADDR_MAX];
 258         int hw_addr_len;
 259
 260         /* interface bandwidth, kbits */
 261         unsigned int bandwidth;
 262
 263         /* Link parameters for Traffic Engineering */
 264         struct if_link_params *link_params;
 265
 266         /* description of the interface. */
 267         char *desc;
 268
 269         /* Distribute list. */
 270         void *distribute_in;
 271         void *distribute_out;
 272
 273         /* Connected address list. */
 274         struct list *connected;
 275
 276         /* Neighbor connected address list. */
 277         struct list *nbr_connected;
 278
 279         /* Daemon specific interface data pointer. */
 280         void *info;
 281
 282         char ptm_enable; /* Should we look at ptm_status ? */
 283         char ptm_status;
 284
 285 /* Statistics fileds. */
 286 #ifdef HAVE_PROC_NET_DEV
 287         struct if_stats stats;
 288 #endif /* HAVE_PROC_NET_DEV */
 289 #ifdef HAVE_NET_RT_IFLIST
 290         struct if_data stats;
 291 #endif /* HAVE_NET_RT_IFLIST */
 292
 293         struct route_node *node;
 294         vrf_id_t vrf_id;
 295
 296         QOBJ_FIELDS
 297 };
 298
 299 RB_HEAD(if_name_head, interface);
 300 RB_PROTOTYPE(if_name_head, interface, name_entry, if_cmp_func)
 301 RB_HEAD(if_index_head, interface);
 302 RB_PROTOTYPE(if_index_head, interface, index_entry, if_cmp_func)
 303 DECLARE_QOBJ_TYPE(interface)
 304
 305 #define IFNAME_RB_INSERT(vrf, ifp)                                             \
 306         if (RB_INSERT(if_name_head, &vrf->ifaces_by_name, (ifp)))              \
 307                 flog_err(EC_LIB_INTERFACE,                                     \
 308                          "%s(%s): corruption detected -- interface with this " \
 309                          "name exists already in VRF %u!",                     \
 310                          __func__, (ifp)->name, (ifp)->vrf_id);
 311
 312 #define IFNAME_RB_REMOVE(vrf, ifp)                                             \
 313         if (RB_REMOVE(if_name_head, &vrf->ifaces_by_name, (ifp)) == NULL)      \
 314                 flog_err(EC_LIB_INTERFACE,                                     \
 315                          "%s(%s): corruption detected -- interface with this " \
 316                          "name doesn't exist in VRF %u!",                      \
 317                          __func__, (ifp)->name, (ifp)->vrf_id);
 318
 319 #define IFINDEX_RB_INSERT(vrf, ifp)                                            \
 320         if (RB_INSERT(if_index_head, &vrf->ifaces_by_index, (ifp)))            \
 321                 flog_err(EC_LIB_INTERFACE,                                     \
 322                          "%s(%u): corruption detected -- interface with this " \
 323                          "ifindex exists already in VRF %u!",                  \
 324                          __func__, (ifp)->ifindex, (ifp)->vrf_id);
 325
 326 #define IFINDEX_RB_REMOVE(vrf, ifp)                                            \
 327         if (RB_REMOVE(if_index_head, &vrf->ifaces_by_index, (ifp)) == NULL)    \
 328                 flog_err(EC_LIB_INTERFACE,                                     \
 329                          "%s(%u): corruption detected -- interface with this " \
 330                          "ifindex doesn't exist in VRF %u!",                   \
 331                          __func__, (ifp)->ifindex, (ifp)->vrf_id);
 332
 333 #define FOR_ALL_INTERFACES(vrf, ifp)                                           \
 334         if (vrf)                                                               \
 335                 RB_FOREACH (ifp, if_name_head, &vrf->ifaces_by_name)
 336
 337 #define FOR_ALL_INTERFACES_ADDRESSES(ifp, connected, node)                     \
 338         for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, connected))
 339
 340 /* called from the library code whenever interfaces are created/deleted
 341  * note: interfaces may not be fully realized at that point; also they
 342  * may not exist in the system (ifindex = IFINDEX_INTERNAL)
 343  *
 344  * priority values are important here, daemons should be at 0 while modules
 345  * can use 1000+ so they run after the daemon has initialised daemon-specific
 346  * interface data
 347  */
 348 DECLARE_HOOK(if_add, (struct interface * ifp), (ifp))
 349 DECLARE_KOOH(if_del, (struct interface * ifp), (ifp))
 350
 351 #define METRIC_MAX (~0)
 352
 353 /* Connected address structure. */
 354 struct connected {
 355         /* Attached interface. */
 356         struct interface *ifp;
 357
 358         /* Flags for configuration. */
 359         uint8_t conf;
 360 #define ZEBRA_IFC_REAL         (1 << 0)
 361 #define ZEBRA_IFC_CONFIGURED   (1 << 1)
 362 #define ZEBRA_IFC_QUEUED       (1 << 2)
 363         /*
 364            The ZEBRA_IFC_REAL flag should be set if and only if this address
 365            exists in the kernel and is actually usable. (A case where it exists
 366            but
 367            is not yet usable would be IPv6 with DAD)
 368            The ZEBRA_IFC_CONFIGURED flag should be set if and only if this
 369            address
 370            was configured by the user from inside quagga.
 371            The ZEBRA_IFC_QUEUED flag should be set if and only if the address
 372            exists
 373            in the kernel. It may and should be set although the address might
 374            not be
 375            usable yet. (compare with ZEBRA_IFC_REAL)
 376          */
 377
 378         /* Flags for connected address. */
 379         uint8_t flags;
 380 #define ZEBRA_IFA_SECONDARY    (1 << 0)
 381 #define ZEBRA_IFA_PEER         (1 << 1)
 382 #define ZEBRA_IFA_UNNUMBERED   (1 << 2)
 383         /* N.B. the ZEBRA_IFA_PEER flag should be set if and only if
 384            a peer address has been configured.  If this flag is set,
 385            the destination field must contain the peer address.
 386          */
 387
 388         /* Address of connected network. */
 389         struct prefix *address;
 390
 391         /* Peer address, if ZEBRA_IFA_PEER is set, otherwise NULL */
 392         struct prefix *destination;
 393
 394         /* Label for Linux 2.2.X and upper. */
 395         char *label;
 396
 397         /*
 398          * Used for setting the connected route's cost. If the metric
 399          * here is set to METRIC_MAX the connected route falls back to
 400          * "struct interface"
 401          */
 402         uint32_t metric;
 403 };
 404
 405 /* Nbr Connected address structure. */
 406 struct nbr_connected {
 407         /* Attached interface. */
 408         struct interface *ifp;
 409
 410         /* Address of connected network. */
 411         struct prefix *address;
 412 };
 413
 414 /* Does the destination field contain a peer address? */
 415 #define CONNECTED_PEER(C) CHECK_FLAG((C)->flags, ZEBRA_IFA_PEER)
 416
 417 /* Prefix to insert into the RIB */
 418 #define CONNECTED_PREFIX(C)                                                    \
 419         (CONNECTED_PEER(C) ? (C)->destination : (C)->address)
 420
 421 /* Identifying address.  We guess that if there's a peer address, but the
 422    local address is in the same prefix, then the local address may be unique. */
 423 #define CONNECTED_ID(C)                                                        \
 424         ((CONNECTED_PEER(C) && !prefix_match((C)->destination, (C)->address))  \
 425                  ? (C)->destination                                            \
 426                  : (C)->address)
 427
 428 /* There are some interface flags which are only supported by some
 429    operating system. */
 430
 431 #ifndef IFF_NOTRAILERS
 432 #define IFF_NOTRAILERS 0x0
 433 #endif /* IFF_NOTRAILERS */
 434 #ifndef IFF_OACTIVE
 435 #define IFF_OACTIVE 0x0
 436 #endif /* IFF_OACTIVE */
 437 #ifndef IFF_SIMPLEX
 438 #define IFF_SIMPLEX 0x0
 439 #endif /* IFF_SIMPLEX */
 440 #ifndef IFF_LINK0
 441 #define IFF_LINK0 0x0
 442 #endif /* IFF_LINK0 */
 443 #ifndef IFF_LINK1
 444 #define IFF_LINK1 0x0
 445 #endif /* IFF_LINK1 */
 446 #ifndef IFF_LINK2
 447 #define IFF_LINK2 0x0
 448 #endif /* IFF_LINK2 */
 449 #ifndef IFF_NOXMIT
 450 #define IFF_NOXMIT 0x0
 451 #endif /* IFF_NOXMIT */
 452 #ifndef IFF_NORTEXCH
 453 #define IFF_NORTEXCH 0x0
 454 #endif /* IFF_NORTEXCH */
 455 #ifndef IFF_IPV4
 456 #define IFF_IPV4 0x0
 457 #endif /* IFF_IPV4 */
 458 #ifndef IFF_IPV6
 459 #define IFF_IPV6 0x0
 460 #endif /* IFF_IPV6 */
 461 #ifndef IFF_VIRTUAL
 462 #define IFF_VIRTUAL 0x0
 463 #endif /* IFF_VIRTUAL */
 464
 465 /* Prototypes. */
 466 extern int if_cmp_name_func(const char *p1, const char *p2);
 467
 468 /*
 469  * Passing in VRF_UNKNOWN is a valid thing to do, unless we
 470  * are creating a new interface.
 471  *
 472  * This is useful for vrf route-leaking.  So more than anything
 473  * else think before you use VRF_UNKNOWN
 474  */
 475 extern void if_update_to_new_vrf(struct interface *, vrf_id_t vrf_id);
 476 extern struct interface *if_create(const char *name, vrf_id_t vrf_id);
 477 extern struct interface *if_create_ifindex(ifindex_t ifindex, vrf_id_t vrf_id);
 478 extern struct interface *if_lookup_by_index(ifindex_t, vrf_id_t vrf_id);
 479 extern struct interface *if_lookup_by_index_all_vrf(ifindex_t);
 480 extern struct interface *if_lookup_exact_address(void *matchaddr, int family,
 481                                                  vrf_id_t vrf_id);
 482 extern struct connected *if_lookup_address(void *matchaddr, int family,
 483                                            vrf_id_t vrf_id);
 484 extern struct interface *if_lookup_prefix(struct prefix *prefix,
 485                                           vrf_id_t vrf_id);
 486 size_t if_lookup_by_hwaddr(const uint8_t *hw_addr, size_t addrsz,
 487                            struct interface ***result, vrf_id_t vrf_id);
 488
 489 /* These 3 functions are to be used when the ifname argument is terminated
 490    by a '\0' character: */
 491 extern struct interface *if_lookup_by_name_all_vrf(const char *ifname);
 492 extern struct interface *if_lookup_by_name(const char *ifname, vrf_id_t vrf_id);
 493 extern struct interface *if_get_by_name(const char *ifname, vrf_id_t vrf_id);
 494 extern struct interface *if_get_by_ifindex(ifindex_t ifindex, vrf_id_t vrf_id);
 495 extern void if_set_index(struct interface *ifp, ifindex_t ifindex);
 496
 497 /* Delete the interface, but do not free the structure, and leave it in the
 498    interface list.  It is often advisable to leave the pseudo interface
 499    structure because there may be configuration information attached. */
 500 extern void if_delete_retain(struct interface *);
 501
 502 /* Delete and free the interface structure: calls if_delete_retain and then
 503    deletes it from the interface list and frees the structure. */
 504 extern void if_delete(struct interface *);
 505
 506 extern int if_is_up(const struct interface *ifp);
 507 extern int if_is_running(const struct interface *ifp);
 508 extern int if_is_operative(const struct interface *ifp);
 509 extern int if_is_no_ptm_operative(const struct interface *ifp);
 510 extern int if_is_loopback(const struct interface *ifp);
 511 extern int if_is_vrf(const struct interface *ifp);
 512 extern bool if_is_loopback_or_vrf(const struct interface *ifp);
 513 extern int if_is_broadcast(const struct interface *ifp);
 514 extern int if_is_pointopoint(const struct interface *ifp);
 515 extern int if_is_multicast(const struct interface *ifp);
 516 struct vrf;
 517 extern void if_terminate(struct vrf *vrf);
 518 extern void if_dump_all(void);
 519 extern const char *if_flag_dump(unsigned long);
 520 extern const char *if_link_type_str(enum zebra_link_type);
 521
 522 /* Please use ifindex2ifname instead of if_indextoname where possible;
 523    ifindex2ifname uses internal interface info, whereas if_indextoname must
 524    make a system call. */
 525 extern const char *ifindex2ifname(ifindex_t, vrf_id_t vrf_id);
 526
 527 /* Please use ifname2ifindex instead of if_nametoindex where possible;
 528    ifname2ifindex uses internal interface info, whereas if_nametoindex must
 529    make a system call. */
 530 extern ifindex_t ifname2ifindex(const char *ifname, vrf_id_t vrf_id);
 531
 532 /* Connected address functions. */
 533 extern struct connected *connected_new(void);
 534 extern void connected_free(struct connected *);
 535 extern void connected_add(struct interface *, struct connected *);
 536 extern struct connected *
 537 connected_add_by_prefix(struct interface *, struct prefix *, struct prefix *);
 538 extern struct connected *connected_delete_by_prefix(struct interface *,
 539                                                     struct prefix *);
 540 extern struct connected *connected_lookup_prefix(struct interface *,
 541                                                  struct prefix *);
 542 extern struct connected *connected_lookup_prefix_exact(struct interface *,
 543                                                        struct prefix *);
 544 extern struct nbr_connected *nbr_connected_new(void);
 545 extern void nbr_connected_free(struct nbr_connected *);
 546 struct nbr_connected *nbr_connected_check(struct interface *, struct prefix *);
 547 struct connected *connected_get_linklocal(struct interface *ifp);
 548
 549 /* link parameters */
 550 struct if_link_params *if_link_params_get(struct interface *);
 551 void if_link_params_free(struct interface *);
 552
 553 /* Northbound. */
 554 extern void if_cmd_init(void);
 555 extern const struct frr_yang_module_info frr_interface_info;
 556
 557 #ifdef __cplusplus
 558 }
 559 #endif
 560
 561 #endif /* _ZEBRA_IF_H */