lib/if.h

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* Interface related header.
   3  * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro
   4  */
   5
   6 #ifndef _ZEBRA_IF_H
   7 #define _ZEBRA_IF_H
   8
   9 #include "zebra.h"
  10 #include "linklist.h"
  11 #include "memory.h"
  12 #include "qobj.h"
  13 #include "hook.h"
  14 #include "admin_group.h"
  15
  16 #ifdef __cplusplus
  17 extern "C" {
  18 #endif
  19
  20 DECLARE_MTYPE(CONNECTED_LABEL);
  21
  22 /* Interface link-layer type, if known. Derived from:
  23  *
  24  * net/if_arp.h on various platforms - Linux especially.
  25  * http://www.iana.org/assignments/arp-parameters/arp-parameters.xhtml
  26  *
  27  * Some of the more obviously defunct technologies left out.
  28  */
  29 enum zebra_link_type {
  30         ZEBRA_LLT_UNKNOWN = 0,
  31         ZEBRA_LLT_ETHER,
  32         ZEBRA_LLT_EETHER,
  33         ZEBRA_LLT_AX25,
  34         ZEBRA_LLT_PRONET,
  35         ZEBRA_LLT_IEEE802,
  36         ZEBRA_LLT_ARCNET,
  37         ZEBRA_LLT_APPLETLK,
  38         ZEBRA_LLT_DLCI,
  39         ZEBRA_LLT_ATM,
  40         ZEBRA_LLT_METRICOM,
  41         ZEBRA_LLT_IEEE1394,
  42         ZEBRA_LLT_EUI64,
  43         ZEBRA_LLT_INFINIBAND,
  44         ZEBRA_LLT_SLIP,
  45         ZEBRA_LLT_CSLIP,
  46         ZEBRA_LLT_SLIP6,
  47         ZEBRA_LLT_CSLIP6,
  48         ZEBRA_LLT_RSRVD,
  49         ZEBRA_LLT_ADAPT,
  50         ZEBRA_LLT_ROSE,
  51         ZEBRA_LLT_X25,
  52         ZEBRA_LLT_PPP,
  53         ZEBRA_LLT_CHDLC,
  54         ZEBRA_LLT_LAPB,
  55         ZEBRA_LLT_RAWHDLC,
  56         ZEBRA_LLT_IPIP,
  57         ZEBRA_LLT_IPIP6,
  58         ZEBRA_LLT_FRAD,
  59         ZEBRA_LLT_SKIP,
  60         ZEBRA_LLT_LOOPBACK,
  61         ZEBRA_LLT_LOCALTLK,
  62         ZEBRA_LLT_FDDI,
  63         ZEBRA_LLT_SIT,
  64         ZEBRA_LLT_IPDDP,
  65         ZEBRA_LLT_IPGRE,
  66         ZEBRA_LLT_IP6GRE,
  67         ZEBRA_LLT_PIMREG,
  68         ZEBRA_LLT_HIPPI,
  69         ZEBRA_LLT_ECONET,
  70         ZEBRA_LLT_IRDA,
  71         ZEBRA_LLT_FCPP,
  72         ZEBRA_LLT_FCAL,
  73         ZEBRA_LLT_FCPL,
  74         ZEBRA_LLT_FCFABRIC,
  75         ZEBRA_LLT_IEEE802_TR,
  76         ZEBRA_LLT_IEEE80211,
  77         ZEBRA_LLT_IEEE80211_RADIOTAP,
  78         ZEBRA_LLT_IEEE802154,
  79         ZEBRA_LLT_IEEE802154_PHY,
  80 };
  81
  82 /*
  83   Interface name length.
  84
  85    Linux define value in /usr/include/linux/if.h.
  86    #define IFNAMSIZ        16
  87
  88    FreeBSD define value in /usr/include/net/if.h.
  89    #define IFNAMSIZ        16
  90 */
  91
  92 #define INTERFACE_NAMSIZ      IFNAMSIZ
  93 #define INTERFACE_HWADDR_MAX  20
  94
  95 typedef signed int ifindex_t;
  96
  97 #ifdef HAVE_PROC_NET_DEV
  98 struct if_stats {
  99         unsigned long rx_packets;   /* total packets received       */
 100         unsigned long tx_packets;   /* total packets transmitted    */
 101         unsigned long rx_bytes;     /* total bytes received         */
 102         unsigned long tx_bytes;     /* total bytes transmitted      */
 103         unsigned long rx_errors;    /* bad packets received         */
 104         unsigned long tx_errors;    /* packet transmit problems     */
 105         unsigned long rx_dropped;   /* no space in linux buffers    */
 106         unsigned long tx_dropped;   /* no space available in linux  */
 107         unsigned long rx_multicast; /* multicast packets received   */
 108         unsigned long rx_compressed;
 109         unsigned long tx_compressed;
 110         unsigned long collisions;
 111
 112         /* detailed rx_errors: */
 113         unsigned long rx_length_errors;
 114         unsigned long rx_over_errors;   /* receiver ring buff overflow  */
 115         unsigned long rx_crc_errors;    /* recved pkt with crc error    */
 116         unsigned long rx_frame_errors;  /* recv'd frame alignment error */
 117         unsigned long rx_fifo_errors;   /* recv'r fifo overrun          */
 118         unsigned long rx_missed_errors; /* receiver missed packet     */
 119         /* detailed tx_errors */
 120         unsigned long tx_aborted_errors;
 121         unsigned long tx_carrier_errors;
 122         unsigned long tx_fifo_errors;
 123         unsigned long tx_heartbeat_errors;
 124         unsigned long tx_window_errors;
 125 };
 126 #endif /* HAVE_PROC_NET_DEV */
 127
 128 /* Here are "non-official" architectural constants. */
 129 #define TE_EXT_MASK             0x00FFFFFF
 130 #define TE_EXT_ANORMAL          0x80000000
 131 #define LOSS_PRECISION          0.000003
 132 /* TE_MEGA_BIT and TE_BYTE are utilized to convert TE bandwidth */
 133 #define TE_MEGA_BIT             1000000
 134 #define TE_BYTE                 8
 135 /* Default TE bandwidth when no value in config.
 136  * The value is in Mbps (will be multiplied by TE_BYTE)
 137  */
 138 #define DEFAULT_BANDWIDTH 10
 139 #define MAX_CLASS_TYPE          8
 140 #define MAX_PKT_LOSS            50.331642
 141
 142 enum affinity_mode {
 143         /* RFC7308 Extended Administrative group */
 144         AFFINITY_MODE_EXTENDED = 0,
 145         /* RFC3630/RFC5305/RFC5329 Administrative group */
 146         AFFINITY_MODE_STANDARD = 1,
 147         /* Standard and Extended Administrative group */
 148         AFFINITY_MODE_BOTH = 2,
 149 };
 150
 151 /*
 152  * Link Parameters Status:
 153  *  equal to 0: unset
 154  *  different from 0: set
 155  */
 156 #define LP_UNSET                0x0000
 157 #define LP_TE_METRIC            0x0001
 158 #define LP_MAX_BW               0x0002
 159 #define LP_MAX_RSV_BW           0x0004
 160 #define LP_UNRSV_BW             0x0008
 161 #define LP_ADM_GRP              0x0010
 162 #define LP_RMT_AS               0x0020
 163 #define LP_DELAY                0x0040
 164 #define LP_MM_DELAY             0x0080
 165 #define LP_DELAY_VAR            0x0100
 166 #define LP_PKT_LOSS             0x0200
 167 #define LP_RES_BW               0x0400
 168 #define LP_AVA_BW               0x0800
 169 #define LP_USE_BW               0x1000
 170 #define LP_EXTEND_ADM_GRP 0x2000
 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  * Do not forget to update if_link_params_copy()
 182  * and if_link_params_cmp() when updating the structure
 183  */
 184 struct if_link_params {
 185         uint32_t lp_status; /* Status of Link Parameters: */
 186         uint32_t te_metric; /* Traffic Engineering metric */
 187         float default_bw;
 188         float max_bw;                   /* Maximum Bandwidth */
 189         float max_rsv_bw;               /* Maximum Reservable Bandwidth */
 190         float unrsv_bw[MAX_CLASS_TYPE]; /* Unreserved Bandwidth per Class Type
 191                                            (8) */
 192         uint32_t admin_grp; /* RFC5305/RFC5329 Administrative group */
 193         struct admin_group ext_admin_grp; /* RFC7308 Extended Admin group */
 194         uint32_t rmt_as;                /* Remote AS number */
 195         struct in_addr rmt_ip;          /* Remote IP address */
 196         uint32_t av_delay;              /* Link Average Delay */
 197         uint32_t min_delay;             /* Link Min Delay */
 198         uint32_t max_delay;             /* Link Max Delay */
 199         uint32_t delay_var;             /* Link Delay Variation */
 200         float pkt_loss;                 /* Link Packet Loss */
 201         float res_bw;                   /* Residual Bandwidth */
 202         float ava_bw;                   /* Available Bandwidth */
 203         float use_bw;                   /* Utilized Bandwidth */
 204 };
 205
 206 #define INTERFACE_LINK_PARAMS_SIZE   sizeof(struct if_link_params)
 207 #define HAS_LINK_PARAMS(ifp)  ((ifp)->link_params != NULL)
 208
 209 /* Interface structure */
 210 struct interface {
 211         RB_ENTRY(interface) name_entry, index_entry;
 212
 213         /* Interface name.  This should probably never be changed after the
 214            interface is created, because the configuration info for this
 215            interface
 216            is associated with this structure.  For that reason, the interface
 217            should also never be deleted (to avoid losing configuration info).
 218            To delete, just set ifindex to IFINDEX_INTERNAL to indicate that the
 219            interface does not exist in the kernel.
 220          */
 221         char name[INTERFACE_NAMSIZ];
 222
 223         /* Interface index (should be IFINDEX_INTERNAL for non-kernel or
 224            deleted interfaces).
 225            WARNING: the ifindex needs to be changed using the if_set_index()
 226            function. Failure to respect this will cause corruption in the data
 227            structure used to store the interfaces and if_lookup_by_index() will
 228            not work as expected.
 229          */
 230         ifindex_t ifindex;
 231         ifindex_t oldifindex;
 232
 233         /*
 234          * ifindex of parent interface, if any
 235          */
 236         ifindex_t link_ifindex;
 237 #define IFINDEX_INTERNAL        0
 238
 239         /* Zebra internal interface status */
 240         uint8_t status;
 241 #define ZEBRA_INTERFACE_ACTIVE     (1 << 0)
 242 #define ZEBRA_INTERFACE_SUB        (1 << 1)
 243 #define ZEBRA_INTERFACE_LINKDETECTION (1 << 2)
 244 #define ZEBRA_INTERFACE_VRF_LOOPBACK (1 << 3)
 245
 246         /* Interface flags. */
 247         uint64_t flags;
 248
 249         /* Interface metric */
 250         uint32_t metric;
 251
 252         /* Interface Speed in Mb/s */
 253         uint32_t speed;
 254
 255         /* Interface MTU. */
 256         unsigned int mtu; /* IPv4 MTU */
 257         unsigned int
 258                 mtu6; /* IPv6 MTU - probably, but not necessarily same as mtu
 259                        */
 260
 261         /* Link-layer information and hardware address */
 262         enum zebra_link_type ll_type;
 263         uint8_t hw_addr[INTERFACE_HWADDR_MAX];
 264         int hw_addr_len;
 265
 266         /* interface bandwidth, kbits */
 267         unsigned int bandwidth;
 268
 269         /* Link parameters for Traffic Engineering */
 270         struct if_link_params *link_params;
 271
 272         /* description of the interface. */
 273         char *desc;
 274
 275         /* Distribute list. */
 276         void *distribute_in;
 277         void *distribute_out;
 278
 279         /* Connected address list. */
 280         struct list *connected;
 281
 282         /* Neighbor connected address list. */
 283         struct list *nbr_connected;
 284
 285         /* Daemon specific interface data pointer. */
 286         void *info;
 287
 288         char ptm_enable; /* Should we look at ptm_status ? */
 289         char ptm_status;
 290
 291 /* Statistics fileds. */
 292 #ifdef HAVE_PROC_NET_DEV
 293         struct if_stats stats;
 294 #endif /* HAVE_PROC_NET_DEV */
 295 #ifdef HAVE_NET_RT_IFLIST
 296         struct if_data stats;
 297 #endif /* HAVE_NET_RT_IFLIST */
 298
 299         struct route_node *node;
 300
 301         struct vrf *vrf;
 302
 303         /*
 304          * Has the end users entered `interface XXXX` from the cli in some
 305          * fashion?
 306          */
 307         bool configured;
 308
 309         QOBJ_FIELDS;
 310 };
 311
 312 RB_HEAD(if_name_head, interface);
 313 RB_PROTOTYPE(if_name_head, interface, name_entry, if_cmp_func)
 314 RB_HEAD(if_index_head, interface);
 315 RB_PROTOTYPE(if_index_head, interface, index_entry, if_cmp_index_func)
 316 DECLARE_QOBJ_TYPE(interface);
 317
 318 #define IFNAME_RB_INSERT(v, ifp)                                                      \
 319         ({                                                                            \
 320                 struct interface *_iz =                                               \
 321                         RB_INSERT(if_name_head, &v->ifaces_by_name, (ifp));           \
 322                 if (_iz)                                                              \
 323                         flog_err(                                                     \
 324                                 EC_LIB_INTERFACE,                                     \
 325                                 "%s(%s): corruption detected -- interface with this " \
 326                                 "name exists already in VRF %s!",                     \
 327                                 __func__, (ifp)->name, (ifp)->vrf->name);             \
 328                 _iz;                                                                  \
 329         })
 330
 331 #define IFNAME_RB_REMOVE(v, ifp)                                                      \
 332         ({                                                                            \
 333                 struct interface *_iz =                                               \
 334                         RB_REMOVE(if_name_head, &v->ifaces_by_name, (ifp));           \
 335                 if (_iz == NULL)                                                      \
 336                         flog_err(                                                     \
 337                                 EC_LIB_INTERFACE,                                     \
 338                                 "%s(%s): corruption detected -- interface with this " \
 339                                 "name doesn't exist in VRF %s!",                      \
 340                                 __func__, (ifp)->name, (ifp)->vrf->name);             \
 341                 _iz;                                                                  \
 342         })
 343
 344
 345 #define IFINDEX_RB_INSERT(v, ifp)                                                     \
 346         ({                                                                            \
 347                 struct interface *_iz =                                               \
 348                         RB_INSERT(if_index_head, &v->ifaces_by_index, (ifp));         \
 349                 if (_iz)                                                              \
 350                         flog_err(                                                     \
 351                                 EC_LIB_INTERFACE,                                     \
 352                                 "%s(%u): corruption detected -- interface with this " \
 353                                 "ifindex exists already in VRF %s!",                  \
 354                                 __func__, (ifp)->ifindex, (ifp)->vrf->name);          \
 355                 _iz;                                                                  \
 356         })
 357
 358 #define IFINDEX_RB_REMOVE(v, ifp)                                                     \
 359         ({                                                                            \
 360                 struct interface *_iz =                                               \
 361                         RB_REMOVE(if_index_head, &v->ifaces_by_index, (ifp));         \
 362                 if (_iz == NULL)                                                      \
 363                         flog_err(                                                     \
 364                                 EC_LIB_INTERFACE,                                     \
 365                                 "%s(%u): corruption detected -- interface with this " \
 366                                 "ifindex doesn't exist in VRF %s!",                   \
 367                                 __func__, (ifp)->ifindex, (ifp)->vrf->name);          \
 368                 _iz;                                                                  \
 369         })
 370
 371 #define FOR_ALL_INTERFACES(vrf, ifp)                                           \
 372         if (vrf)                                                               \
 373                 RB_FOREACH (ifp, if_name_head, &vrf->ifaces_by_name)
 374
 375 #define FOR_ALL_INTERFACES_ADDRESSES(ifp, connected, node)                     \
 376         for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, connected))
 377
 378 /* called from the library code whenever interfaces are created/deleted
 379  * note: interfaces may not be fully realized at that point; also they
 380  * may not exist in the system (ifindex = IFINDEX_INTERNAL)
 381  *
 382  * priority values are important here, daemons should be at 0 while modules
 383  * can use 1000+ so they run after the daemon has initialised daemon-specific
 384  * interface data
 385  */
 386 DECLARE_HOOK(if_add, (struct interface * ifp), (ifp));
 387 DECLARE_KOOH(if_del, (struct interface * ifp), (ifp));
 388
 389 #define METRIC_MAX (~0)
 390
 391 /* Connected address structure. */
 392 struct connected {
 393         /* Attached interface. */
 394         struct interface *ifp;
 395
 396         /* Flags for configuration. */
 397         uint8_t conf;
 398 #define ZEBRA_IFC_REAL         (1 << 0)
 399 #define ZEBRA_IFC_CONFIGURED   (1 << 1)
 400 #define ZEBRA_IFC_QUEUED       (1 << 2)
 401 #define ZEBRA_IFC_DOWN         (1 << 3)
 402         /*
 403            The ZEBRA_IFC_REAL flag should be set if and only if this address
 404            exists in the kernel and is actually usable. (A case where it exists
 405            but is not yet usable would be IPv6 with DAD)
 406            The ZEBRA_IFC_CONFIGURED flag should be set if and only if this
 407            address was configured by the user from inside frr.
 408            The ZEBRA_IFC_QUEUED flag should be set if and only if the address
 409            exists in the kernel. It may and should be set although the
 410            address might not be usable yet. (compare with ZEBRA_IFC_REAL)
 411            The ZEBRA_IFC_DOWN flag is used to record that an address is
 412            present, but down/unavailable.
 413          */
 414
 415         /* Flags for connected address. */
 416         uint8_t flags;
 417 #define ZEBRA_IFA_SECONDARY    (1 << 0)
 418 #define ZEBRA_IFA_PEER         (1 << 1)
 419 #define ZEBRA_IFA_UNNUMBERED   (1 << 2)
 420         /* N.B. the ZEBRA_IFA_PEER flag should be set if and only if
 421            a peer address has been configured.  If this flag is set,
 422            the destination field must contain the peer address.
 423          */
 424
 425         /* Address of connected network. */
 426         struct prefix *address;
 427
 428         /* Peer address, if ZEBRA_IFA_PEER is set, otherwise NULL */
 429         struct prefix *destination;
 430
 431         /* Label for Linux 2.2.X and upper. */
 432         char *label;
 433
 434         /*
 435          * Used for setting the connected route's cost. If the metric
 436          * here is set to METRIC_MAX the connected route falls back to
 437          * "struct interface"
 438          */
 439         uint32_t metric;
 440 };
 441
 442 /* Nbr Connected address structure. */
 443 struct nbr_connected {
 444         /* Attached interface. */
 445         struct interface *ifp;
 446
 447         /* Address of connected network. */
 448         struct prefix *address;
 449 };
 450
 451 /* Does the destination field contain a peer address? */
 452 #define CONNECTED_PEER(C) CHECK_FLAG((C)->flags, ZEBRA_IFA_PEER)
 453
 454 /* Prefix to insert into the RIB */
 455 #define CONNECTED_PREFIX(C)                                                    \
 456         (CONNECTED_PEER(C) ? (C)->destination : (C)->address)
 457
 458 /* Identifying address.  We guess that if there's a peer address, but the
 459    local address is in the same prefix, then the local address may be unique. */
 460 #define CONNECTED_ID(C)                                                        \
 461         ((CONNECTED_PEER(C) && !prefix_match((C)->destination, (C)->address))  \
 462                  ? (C)->destination                                            \
 463                  : (C)->address)
 464
 465 /* There are some interface flags which are only supported by some
 466    operating system. */
 467
 468 #ifndef IFF_NOTRAILERS
 469 #define IFF_NOTRAILERS 0x0
 470 #endif /* IFF_NOTRAILERS */
 471 #ifndef IFF_OACTIVE
 472 #define IFF_OACTIVE 0x0
 473 #endif /* IFF_OACTIVE */
 474 #ifndef IFF_SIMPLEX
 475 #define IFF_SIMPLEX 0x0
 476 #endif /* IFF_SIMPLEX */
 477 #ifndef IFF_LINK0
 478 #define IFF_LINK0 0x0
 479 #endif /* IFF_LINK0 */
 480 #ifndef IFF_LINK1
 481 #define IFF_LINK1 0x0
 482 #endif /* IFF_LINK1 */
 483 #ifndef IFF_LINK2
 484 #define IFF_LINK2 0x0
 485 #endif /* IFF_LINK2 */
 486 #ifndef IFF_NOXMIT
 487 #define IFF_NOXMIT 0x0
 488 #endif /* IFF_NOXMIT */
 489 #ifndef IFF_NORTEXCH
 490 #define IFF_NORTEXCH 0x0
 491 #endif /* IFF_NORTEXCH */
 492 #ifndef IFF_IPV4
 493 #define IFF_IPV4 0x0
 494 #endif /* IFF_IPV4 */
 495 #ifndef IFF_IPV6
 496 #define IFF_IPV6 0x0
 497 #endif /* IFF_IPV6 */
 498 #ifndef IFF_VIRTUAL
 499 #define IFF_VIRTUAL 0x0
 500 #endif /* IFF_VIRTUAL */
 501
 502 /* Prototypes. */
 503 extern int if_cmp_name_func(const char *p1, const char *p2);
 504
 505 /*
 506  * Passing in VRF_UNKNOWN is a valid thing to do, unless we
 507  * are creating a new interface.
 508  *
 509  * This is useful for vrf route-leaking.  So more than anything
 510  * else think before you use VRF_UNKNOWN
 511  */
 512 extern void if_update_to_new_vrf(struct interface *, vrf_id_t vrf_id);
 513
 514 extern struct interface *if_lookup_by_index(ifindex_t, vrf_id_t vrf_id);
 515 extern struct interface *if_vrf_lookup_by_index_next(ifindex_t ifindex,
 516                                                      vrf_id_t vrf_id);
 517 extern struct interface *if_lookup_address_local(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 static inline bool if_address_is_local(const void *matchaddr, int family,
 527                                        vrf_id_t vrf_id)
 528 {
 529         return if_lookup_address_local(matchaddr, family, vrf_id) != NULL;
 530 }
 531
 532 struct vrf;
 533 extern struct interface *if_lookup_by_name_vrf(const char *name, struct vrf *vrf);
 534 extern struct interface *if_lookup_by_name(const char *ifname, vrf_id_t vrf_id);
 535 extern struct interface *if_get_vrf_loopback(vrf_id_t vrf_id);
 536 extern struct interface *if_get_by_name(const char *ifname, vrf_id_t vrf_id,
 537                                         const char *vrf_name);
 538
 539 /* Sets the index and adds to index list */
 540 extern int if_set_index(struct interface *ifp, ifindex_t ifindex);
 541
 542 /* Delete the interface, but do not free the structure, and leave it in the
 543    interface list.  It is often advisable to leave the pseudo interface
 544    structure because there may be configuration information attached. */
 545 extern void if_delete_retain(struct interface *);
 546
 547 /* Delete and free the interface structure: calls if_delete_retain and then
 548    deletes it from the interface list and frees the structure. */
 549 extern void if_delete(struct interface **ifp);
 550
 551 extern int if_is_up(const struct interface *ifp);
 552 extern int if_is_running(const struct interface *ifp);
 553 extern int if_is_operative(const struct interface *ifp);
 554 extern int if_is_no_ptm_operative(const struct interface *ifp);
 555 extern int if_is_loopback_exact(const struct interface *ifp);
 556 extern int if_is_vrf(const struct interface *ifp);
 557 extern bool if_is_loopback(const struct interface *ifp);
 558 extern int if_is_broadcast(const struct interface *ifp);
 559 extern int if_is_pointopoint(const struct interface *ifp);
 560 extern int if_is_multicast(const struct interface *ifp);
 561 extern void if_terminate(struct vrf *vrf);
 562 extern void if_dump_all(void);
 563 extern const char *if_flag_dump(unsigned long);
 564 extern const char *if_link_type_str(enum zebra_link_type);
 565
 566 /* Please use ifindex2ifname instead of if_indextoname where possible;
 567    ifindex2ifname uses internal interface info, whereas if_indextoname must
 568    make a system call. */
 569 extern const char *ifindex2ifname(ifindex_t, vrf_id_t vrf_id);
 570
 571 /* Please use ifname2ifindex instead of if_nametoindex where possible;
 572    ifname2ifindex uses internal interface info, whereas if_nametoindex must
 573    make a system call. */
 574 extern ifindex_t ifname2ifindex(const char *ifname, vrf_id_t vrf_id);
 575
 576 /* Connected address functions. */
 577 extern struct connected *connected_new(void);
 578 extern void connected_free(struct connected **connected);
 579 extern void connected_add(struct interface *, struct connected *);
 580 extern struct connected *
 581 connected_add_by_prefix(struct interface *, struct prefix *, struct prefix *);
 582 extern struct connected *connected_delete_by_prefix(struct interface *,
 583                                                     struct prefix *);
 584 extern struct connected *connected_lookup_prefix(struct interface *,
 585                                                  const struct prefix *);
 586 extern struct connected *connected_lookup_prefix_exact(struct interface *,
 587                                                        const struct prefix *);
 588 extern unsigned int connected_count_by_family(struct interface *, int family);
 589 extern struct nbr_connected *nbr_connected_new(void);
 590 extern void nbr_connected_free(struct nbr_connected *);
 591 struct nbr_connected *nbr_connected_check(struct interface *, struct prefix *);
 592 struct connected *connected_get_linklocal(struct interface *ifp);
 593
 594 /* link parameters */
 595 bool if_link_params_cmp(struct if_link_params *iflp1,
 596                         struct if_link_params *iflp2);
 597 void if_link_params_copy(struct if_link_params *dst,
 598                          struct if_link_params *src);
 599 struct if_link_params *if_link_params_get(struct interface *);
 600 struct if_link_params *if_link_params_enable(struct interface *ifp);
 601 struct if_link_params *if_link_params_init(struct interface *ifp);
 602 void if_link_params_free(struct interface *);
 603
 604 /* Northbound. */
 605 struct vty;
 606 extern void if_vty_config_start(struct vty *vty, struct interface *ifp);
 607 extern void if_vty_config_end(struct vty *vty);
 608 extern void if_cmd_init(int (*config_write)(struct vty *));
 609 extern void if_cmd_init_default(void);
 610 extern void if_zapi_callbacks(int (*create)(struct interface *ifp),
 611                               int (*up)(struct interface *ifp),
 612                               int (*down)(struct interface *ifp),
 613                               int (*destroy)(struct interface *ifp));
 614
 615 extern void if_new_via_zapi(struct interface *ifp);
 616 extern void if_up_via_zapi(struct interface *ifp);
 617 extern void if_down_via_zapi(struct interface *ifp);
 618 extern void if_destroy_via_zapi(struct interface *ifp);
 619
 620 extern const struct frr_yang_module_info frr_interface_info;
 621
 622 #ifdef __cplusplus
 623 }
 624 #endif
 625
 626 #endif /* _ZEBRA_IF_H */