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+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Interface related header.
+ * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro
+ */
+
+#ifndef _ZEBRA_IF_H
+#define _ZEBRA_IF_H
+
+#include "zebra.h"
+#include "linklist.h"
+#include "memory.h"
+#include "qobj.h"
+#include "hook.h"
+#include "admin_group.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+DECLARE_MTYPE(CONNECTED_LABEL);
+
+/* Interface link-layer type, if known. Derived from:
+ *
+ * net/if_arp.h on various platforms - Linux especially.
+ * http://www.iana.org/assignments/arp-parameters/arp-parameters.xhtml
+ *
+ * Some of the more obviously defunct technologies left out.
+ */
+enum zebra_link_type {
+ ZEBRA_LLT_UNKNOWN = 0,
+ ZEBRA_LLT_ETHER,
+ ZEBRA_LLT_EETHER,
+ ZEBRA_LLT_AX25,
+ ZEBRA_LLT_PRONET,
+ ZEBRA_LLT_IEEE802,
+ ZEBRA_LLT_ARCNET,
+ ZEBRA_LLT_APPLETLK,
+ ZEBRA_LLT_DLCI,
+ ZEBRA_LLT_ATM,
+ ZEBRA_LLT_METRICOM,
+ ZEBRA_LLT_IEEE1394,
+ ZEBRA_LLT_EUI64,
+ ZEBRA_LLT_INFINIBAND,
+ ZEBRA_LLT_SLIP,
+ ZEBRA_LLT_CSLIP,
+ ZEBRA_LLT_SLIP6,
+ ZEBRA_LLT_CSLIP6,
+ ZEBRA_LLT_RSRVD,
+ ZEBRA_LLT_ADAPT,
+ ZEBRA_LLT_ROSE,
+ ZEBRA_LLT_X25,
+ ZEBRA_LLT_PPP,
+ ZEBRA_LLT_CHDLC,
+ ZEBRA_LLT_LAPB,
+ ZEBRA_LLT_RAWHDLC,
+ ZEBRA_LLT_IPIP,
+ ZEBRA_LLT_IPIP6,
+ ZEBRA_LLT_FRAD,
+ ZEBRA_LLT_SKIP,
+ ZEBRA_LLT_LOOPBACK,
+ ZEBRA_LLT_LOCALTLK,
+ ZEBRA_LLT_FDDI,
+ ZEBRA_LLT_SIT,
+ ZEBRA_LLT_IPDDP,
+ ZEBRA_LLT_IPGRE,
+ ZEBRA_LLT_IP6GRE,
+ ZEBRA_LLT_PIMREG,
+ ZEBRA_LLT_HIPPI,
+ ZEBRA_LLT_ECONET,
+ ZEBRA_LLT_IRDA,
+ ZEBRA_LLT_FCPP,
+ ZEBRA_LLT_FCAL,
+ ZEBRA_LLT_FCPL,
+ ZEBRA_LLT_FCFABRIC,
+ ZEBRA_LLT_IEEE802_TR,
+ ZEBRA_LLT_IEEE80211,
+ ZEBRA_LLT_IEEE80211_RADIOTAP,
+ ZEBRA_LLT_IEEE802154,
+ ZEBRA_LLT_IEEE802154_PHY,
+};
+
+/*
+ Interface name length.
+
+ Linux define value in /usr/include/linux/if.h.
+ #define IFNAMSIZ 16
+
+ FreeBSD define value in /usr/include/net/if.h.
+ #define IFNAMSIZ 16
+*/
+
+#define INTERFACE_NAMSIZ IFNAMSIZ
+#define INTERFACE_HWADDR_MAX 20
+
+typedef signed int ifindex_t;
+
+#ifdef HAVE_PROC_NET_DEV
+struct if_stats {
+ unsigned long rx_packets; /* total packets received */
+ unsigned long tx_packets; /* total packets transmitted */
+ unsigned long rx_bytes; /* total bytes received */
+ unsigned long tx_bytes; /* total bytes transmitted */
+ unsigned long rx_errors; /* bad packets received */
+ unsigned long tx_errors; /* packet transmit problems */
+ unsigned long rx_dropped; /* no space in linux buffers */
+ unsigned long tx_dropped; /* no space available in linux */
+ unsigned long rx_multicast; /* multicast packets received */
+ unsigned long rx_compressed;
+ unsigned long tx_compressed;
+ unsigned long collisions;
+
+ /* detailed rx_errors: */
+ unsigned long rx_length_errors;
+ unsigned long rx_over_errors; /* receiver ring buff overflow */
+ unsigned long rx_crc_errors; /* recved pkt with crc error */
+ unsigned long rx_frame_errors; /* recv'd frame alignment error */
+ unsigned long rx_fifo_errors; /* recv'r fifo overrun */
+ unsigned long rx_missed_errors; /* receiver missed packet */
+ /* detailed tx_errors */
+ unsigned long tx_aborted_errors;
+ unsigned long tx_carrier_errors;
+ unsigned long tx_fifo_errors;
+ unsigned long tx_heartbeat_errors;
+ unsigned long tx_window_errors;
+};
+#endif /* HAVE_PROC_NET_DEV */
+
+/* Here are "non-official" architectural constants. */
+#define TE_EXT_MASK 0x00FFFFFF
+#define TE_EXT_ANORMAL 0x80000000
+#define LOSS_PRECISION 0.000003
+/* TE_MEGA_BIT and TE_BYTE are utilized to convert TE bandwidth */
+#define TE_MEGA_BIT 1000000
+#define TE_BYTE 8
+/* Default TE bandwidth when no value in config.
+ * The value is in Mbps (will be multiplied by TE_BYTE)
+ */
+#define DEFAULT_BANDWIDTH 10
+#define MAX_CLASS_TYPE 8
+#define MAX_PKT_LOSS 50.331642
+
+enum affinity_mode {
+ /* RFC7308 Extended Administrative group */
+ AFFINITY_MODE_EXTENDED = 0,
+ /* RFC3630/RFC5305/RFC5329 Administrative group */
+ AFFINITY_MODE_STANDARD = 1,
+ /* Standard and Extended Administrative group */
+ AFFINITY_MODE_BOTH = 2,
+};
+
+/*
+ * Link Parameters Status:
+ * equal to 0: unset
+ * different from 0: set
+ */
+#define LP_UNSET 0x0000
+#define LP_TE_METRIC 0x0001
+#define LP_MAX_BW 0x0002
+#define LP_MAX_RSV_BW 0x0004
+#define LP_UNRSV_BW 0x0008
+#define LP_ADM_GRP 0x0010
+#define LP_RMT_AS 0x0020
+#define LP_DELAY 0x0040
+#define LP_MM_DELAY 0x0080
+#define LP_DELAY_VAR 0x0100
+#define LP_PKT_LOSS 0x0200
+#define LP_RES_BW 0x0400
+#define LP_AVA_BW 0x0800
+#define LP_USE_BW 0x1000
+#define LP_EXTEND_ADM_GRP 0x2000
+
+#define IS_PARAM_UNSET(lp, st) !(lp->lp_status & st)
+#define IS_PARAM_SET(lp, st) (lp->lp_status & st)
+#define IS_LINK_PARAMS_SET(lp) (lp->lp_status != LP_UNSET)
+
+#define SET_PARAM(lp, st) (lp->lp_status) |= (st)
+#define UNSET_PARAM(lp, st) (lp->lp_status) &= ~(st)
+#define RESET_LINK_PARAM(lp) (lp->lp_status = LP_UNSET)
+
+/* Link Parameters for Traffic Engineering
+ * Do not forget to update if_link_params_copy()
+ * and if_link_params_cmp() when updating the structure
+ */
+struct if_link_params {
+ uint32_t lp_status; /* Status of Link Parameters: */
+ uint32_t te_metric; /* Traffic Engineering metric */
+ float default_bw;
+ float max_bw; /* Maximum Bandwidth */
+ float max_rsv_bw; /* Maximum Reservable Bandwidth */
+ float unrsv_bw[MAX_CLASS_TYPE]; /* Unreserved Bandwidth per Class Type
+ (8) */
+ uint32_t admin_grp; /* RFC5305/RFC5329 Administrative group */
+ struct admin_group ext_admin_grp; /* RFC7308 Extended Admin group */
+ uint32_t rmt_as; /* Remote AS number */
+ struct in_addr rmt_ip; /* Remote IP address */
+ uint32_t av_delay; /* Link Average Delay */
+ uint32_t min_delay; /* Link Min Delay */
+ uint32_t max_delay; /* Link Max Delay */
+ uint32_t delay_var; /* Link Delay Variation */
+ float pkt_loss; /* Link Packet Loss */
+ float res_bw; /* Residual Bandwidth */
+ float ava_bw; /* Available Bandwidth */
+ float use_bw; /* Utilized Bandwidth */
+};
+
+#define INTERFACE_LINK_PARAMS_SIZE sizeof(struct if_link_params)
+#define HAS_LINK_PARAMS(ifp) ((ifp)->link_params != NULL)
+
+/* Interface structure */
+struct interface {
+ RB_ENTRY(interface) name_entry, index_entry;
+
+ /* Interface name. This should probably never be changed after the
+ interface is created, because the configuration info for this
+ interface
+ is associated with this structure. For that reason, the interface
+ should also never be deleted (to avoid losing configuration info).
+ To delete, just set ifindex to IFINDEX_INTERNAL to indicate that the
+ interface does not exist in the kernel.
+ */
+ char name[INTERFACE_NAMSIZ];
+
+ /* Interface index (should be IFINDEX_INTERNAL for non-kernel or
+ deleted interfaces).
+ WARNING: the ifindex needs to be changed using the if_set_index()
+ function. Failure to respect this will cause corruption in the data
+ structure used to store the interfaces and if_lookup_by_index() will
+ not work as expected.
+ */
+ ifindex_t ifindex;
+ ifindex_t oldifindex;
+
+ /*
+ * ifindex of parent interface, if any
+ */
+ ifindex_t link_ifindex;
+#define IFINDEX_INTERNAL 0
+
+ /* Zebra internal interface status */
+ uint8_t status;
+#define ZEBRA_INTERFACE_ACTIVE (1 << 0)
+#define ZEBRA_INTERFACE_SUB (1 << 1)
+#define ZEBRA_INTERFACE_LINKDETECTION (1 << 2)
+#define ZEBRA_INTERFACE_VRF_LOOPBACK (1 << 3)
+
+ /* Interface flags. */
+ uint64_t flags;
+
+ /* Interface metric */
+ uint32_t metric;
+
+ /* Interface Speed in Mb/s */
+ uint32_t speed;
+
+ /* TX queue len */
+ uint32_t txqlen;
+
+ /* Interface MTU. */
+ unsigned int mtu; /* IPv4 MTU */
+ unsigned int
+ mtu6; /* IPv6 MTU - probably, but not necessarily same as mtu
+ */
+
+ /* Link-layer information and hardware address */
+ enum zebra_link_type ll_type;
+ uint8_t hw_addr[INTERFACE_HWADDR_MAX];
+ int hw_addr_len;
+
+ /* interface bandwidth, kbits */
+ unsigned int bandwidth;
+
+ /* Link parameters for Traffic Engineering */
+ struct if_link_params *link_params;
+
+ /* description of the interface. */
+ char *desc;
+
+ /* Distribute list. */
+ void *distribute_in;
+ void *distribute_out;
+
+ /* Connected address list. */
+ struct list *connected;
+
+ /* Neighbor connected address list. */
+ struct list *nbr_connected;
+
+ /* Daemon specific interface data pointer. */
+ void *info;
+
+ char ptm_enable; /* Should we look at ptm_status ? */
+ char ptm_status;
+
+/* Statistics fileds. */
+#ifdef HAVE_PROC_NET_DEV
+ struct if_stats stats;
+#endif /* HAVE_PROC_NET_DEV */
+#ifdef HAVE_NET_RT_IFLIST
+ struct if_data stats;
+#endif /* HAVE_NET_RT_IFLIST */
+
+ struct route_node *node;
+
+ struct vrf *vrf;
+
+ /*
+ * Has the end users entered `interface XXXX` from the cli in some
+ * fashion?
+ */
+ bool configured;
+
+ QOBJ_FIELDS;
+};
+
+RB_HEAD(if_name_head, interface);
+RB_PROTOTYPE(if_name_head, interface, name_entry, if_cmp_func)
+RB_HEAD(if_index_head, interface);
+RB_PROTOTYPE(if_index_head, interface, index_entry, if_cmp_index_func)
+DECLARE_QOBJ_TYPE(interface);
+
+#define IFNAME_RB_INSERT(v, ifp) \
+ ({ \
+ struct interface *_iz = \
+ RB_INSERT(if_name_head, &v->ifaces_by_name, (ifp)); \
+ if (_iz) \
+ flog_err( \
+ EC_LIB_INTERFACE, \
+ "%s(%s): corruption detected -- interface with this " \
+ "name exists already in VRF %s!", \
+ __func__, (ifp)->name, (ifp)->vrf->name); \
+ _iz; \
+ })
+
+#define IFNAME_RB_REMOVE(v, ifp) \
+ ({ \
+ struct interface *_iz = \
+ RB_REMOVE(if_name_head, &v->ifaces_by_name, (ifp)); \
+ if (_iz == NULL) \
+ flog_err( \
+ EC_LIB_INTERFACE, \
+ "%s(%s): corruption detected -- interface with this " \
+ "name doesn't exist in VRF %s!", \
+ __func__, (ifp)->name, (ifp)->vrf->name); \
+ _iz; \
+ })
+
+
+#define IFINDEX_RB_INSERT(v, ifp) \
+ ({ \
+ struct interface *_iz = \
+ RB_INSERT(if_index_head, &v->ifaces_by_index, (ifp)); \
+ if (_iz) \
+ flog_err( \
+ EC_LIB_INTERFACE, \
+ "%s(%u): corruption detected -- interface with this " \
+ "ifindex exists already in VRF %s!", \
+ __func__, (ifp)->ifindex, (ifp)->vrf->name); \
+ _iz; \
+ })
+
+#define IFINDEX_RB_REMOVE(v, ifp) \
+ ({ \
+ struct interface *_iz = \
+ RB_REMOVE(if_index_head, &v->ifaces_by_index, (ifp)); \
+ if (_iz == NULL) \
+ flog_err( \
+ EC_LIB_INTERFACE, \
+ "%s(%u): corruption detected -- interface with this " \
+ "ifindex doesn't exist in VRF %s!", \
+ __func__, (ifp)->ifindex, (ifp)->vrf->name); \
+ _iz; \
+ })
+
+#define FOR_ALL_INTERFACES(vrf, ifp) \
+ if (vrf) \
+ RB_FOREACH (ifp, if_name_head, &vrf->ifaces_by_name)
+
+#define FOR_ALL_INTERFACES_ADDRESSES(ifp, connected, node) \
+ for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, connected))
+
+/* called from the library code whenever interfaces are created/deleted
+ * note: interfaces may not be fully realized at that point; also they
+ * may not exist in the system (ifindex = IFINDEX_INTERNAL)
+ *
+ * priority values are important here, daemons should be at 0 while modules
+ * can use 1000+ so they run after the daemon has initialised daemon-specific
+ * interface data
+ */
+DECLARE_HOOK(if_add, (struct interface * ifp), (ifp));
+DECLARE_KOOH(if_del, (struct interface * ifp), (ifp));
+
+#define METRIC_MAX (~0)
+
+/* Connected address structure. */
+struct connected {
+ /* Attached interface. */
+ struct interface *ifp;
+
+ /* Flags for configuration. */
+ uint8_t conf;
+#define ZEBRA_IFC_REAL (1 << 0)
+#define ZEBRA_IFC_CONFIGURED (1 << 1)
+#define ZEBRA_IFC_QUEUED (1 << 2)
+#define ZEBRA_IFC_DOWN (1 << 3)
+ /*
+ The ZEBRA_IFC_REAL flag should be set if and only if this address
+ exists in the kernel and is actually usable. (A case where it exists
+ but is not yet usable would be IPv6 with DAD)
+ The ZEBRA_IFC_CONFIGURED flag should be set if and only if this
+ address was configured by the user from inside frr.
+ The ZEBRA_IFC_QUEUED flag should be set if and only if the address
+ exists in the kernel. It may and should be set although the
+ address might not be usable yet. (compare with ZEBRA_IFC_REAL)
+ The ZEBRA_IFC_DOWN flag is used to record that an address is
+ present, but down/unavailable.
+ */
+
+ /* Flags for connected address. */
+ uint8_t flags;
+#define ZEBRA_IFA_SECONDARY (1 << 0)
+#define ZEBRA_IFA_PEER (1 << 1)
+#define ZEBRA_IFA_UNNUMBERED (1 << 2)
+ /* N.B. the ZEBRA_IFA_PEER flag should be set if and only if
+ a peer address has been configured. If this flag is set,
+ the destination field must contain the peer address.
+ */
+
+ /* Address of connected network. */
+ struct prefix *address;
+
+ /* Peer address, if ZEBRA_IFA_PEER is set, otherwise NULL */
+ struct prefix *destination;
+
+ /* Label for Linux 2.2.X and upper. */
+ char *label;
+
+ /*
+ * Used for setting the connected route's cost. If the metric
+ * here is set to METRIC_MAX the connected route falls back to
+ * "struct interface"
+ */
+ uint32_t metric;
+};
+
+/* Nbr Connected address structure. */
+struct nbr_connected {
+ /* Attached interface. */
+ struct interface *ifp;
+
+ /* Address of connected network. */
+ struct prefix *address;
+};
+
+/* Does the destination field contain a peer address? */
+#define CONNECTED_PEER(C) CHECK_FLAG((C)->flags, ZEBRA_IFA_PEER)
+
+/* Prefix to insert into the RIB */
+#define CONNECTED_PREFIX(C) \
+ (CONNECTED_PEER(C) ? (C)->destination : (C)->address)
+
+/* Identifying address. We guess that if there's a peer address, but the
+ local address is in the same prefix, then the local address may be unique. */
+#define CONNECTED_ID(C) \
+ ((CONNECTED_PEER(C) && !prefix_match((C)->destination, (C)->address)) \
+ ? (C)->destination \
+ : (C)->address)
+
+/* There are some interface flags which are only supported by some
+ operating system. */
+
+#ifndef IFF_NOTRAILERS
+#define IFF_NOTRAILERS 0x0
+#endif /* IFF_NOTRAILERS */
+#ifndef IFF_OACTIVE
+#define IFF_OACTIVE 0x0
+#endif /* IFF_OACTIVE */
+#ifndef IFF_SIMPLEX
+#define IFF_SIMPLEX 0x0
+#endif /* IFF_SIMPLEX */
+#ifndef IFF_LINK0
+#define IFF_LINK0 0x0
+#endif /* IFF_LINK0 */
+#ifndef IFF_LINK1
+#define IFF_LINK1 0x0
+#endif /* IFF_LINK1 */
+#ifndef IFF_LINK2
+#define IFF_LINK2 0x0
+#endif /* IFF_LINK2 */
+#ifndef IFF_NOXMIT
+#define IFF_NOXMIT 0x0
+#endif /* IFF_NOXMIT */
+#ifndef IFF_NORTEXCH
+#define IFF_NORTEXCH 0x0
+#endif /* IFF_NORTEXCH */
+#ifndef IFF_IPV4
+#define IFF_IPV4 0x0
+#endif /* IFF_IPV4 */
+#ifndef IFF_IPV6
+#define IFF_IPV6 0x0
+#endif /* IFF_IPV6 */
+#ifndef IFF_VIRTUAL
+#define IFF_VIRTUAL 0x0
+#endif /* IFF_VIRTUAL */
+
+/* Prototypes. */
+extern int if_cmp_name_func(const char *p1, const char *p2);
+
+/*
+ * Passing in VRF_UNKNOWN is a valid thing to do, unless we
+ * are creating a new interface.
+ *
+ * This is useful for vrf route-leaking. So more than anything
+ * else think before you use VRF_UNKNOWN
+ */
+extern void if_update_to_new_vrf(struct interface *, vrf_id_t vrf_id);
+
+extern struct interface *if_lookup_by_index(ifindex_t, vrf_id_t vrf_id);
+extern struct interface *if_vrf_lookup_by_index_next(ifindex_t ifindex,
+ vrf_id_t vrf_id);
+extern struct interface *if_lookup_address_local(const void *matchaddr,
+ int family, vrf_id_t vrf_id);
+extern struct connected *if_lookup_address(const void *matchaddr, int family,
+ vrf_id_t vrf_id);
+extern struct interface *if_lookup_prefix(const struct prefix *prefix,
+ vrf_id_t vrf_id);
+size_t if_lookup_by_hwaddr(const uint8_t *hw_addr, size_t addrsz,
+ struct interface ***result, vrf_id_t vrf_id);
+
+static inline bool if_address_is_local(const void *matchaddr, int family,
+ vrf_id_t vrf_id)
+{
+ return if_lookup_address_local(matchaddr, family, vrf_id) != NULL;
+}
+
+struct vrf;
+extern struct interface *if_lookup_by_name_vrf(const char *name, struct vrf *vrf);
+extern struct interface *if_lookup_by_name(const char *ifname, vrf_id_t vrf_id);
+extern struct interface *if_get_vrf_loopback(vrf_id_t vrf_id);
+extern struct interface *if_get_by_name(const char *ifname, vrf_id_t vrf_id,
+ const char *vrf_name);
+
+/* Sets the index and adds to index list */
+extern int if_set_index(struct interface *ifp, ifindex_t ifindex);
+
+/* Delete the interface, but do not free the structure, and leave it in the
+ interface list. It is often advisable to leave the pseudo interface
+ structure because there may be configuration information attached. */
+extern void if_delete_retain(struct interface *);
+
+/* Delete and free the interface structure: calls if_delete_retain and then
+ deletes it from the interface list and frees the structure. */
+extern void if_delete(struct interface **ifp);
+
+extern int if_is_up(const struct interface *ifp);
+extern int if_is_running(const struct interface *ifp);
+extern int if_is_operative(const struct interface *ifp);
+extern int if_is_no_ptm_operative(const struct interface *ifp);
+extern int if_is_loopback_exact(const struct interface *ifp);
+extern int if_is_vrf(const struct interface *ifp);
+extern bool if_is_loopback(const struct interface *ifp);
+extern int if_is_broadcast(const struct interface *ifp);
+extern int if_is_pointopoint(const struct interface *ifp);
+extern int if_is_multicast(const struct interface *ifp);
+extern void if_terminate(struct vrf *vrf);
+extern void if_dump_all(void);
+extern const char *if_flag_dump(unsigned long);
+extern const char *if_link_type_str(enum zebra_link_type);
+
+/* Please use ifindex2ifname instead of if_indextoname where possible;
+ ifindex2ifname uses internal interface info, whereas if_indextoname must
+ make a system call. */
+extern const char *ifindex2ifname(ifindex_t, vrf_id_t vrf_id);
+
+/* Please use ifname2ifindex instead of if_nametoindex where possible;
+ ifname2ifindex uses internal interface info, whereas if_nametoindex must
+ make a system call. */
+extern ifindex_t ifname2ifindex(const char *ifname, vrf_id_t vrf_id);
+
+/* Connected address functions. */
+extern struct connected *connected_new(void);
+extern void connected_free(struct connected **connected);
+extern void connected_add(struct interface *, struct connected *);
+extern struct connected *
+connected_add_by_prefix(struct interface *, struct prefix *, struct prefix *);
+extern struct connected *connected_delete_by_prefix(struct interface *,
+ struct prefix *);
+extern struct connected *connected_lookup_prefix(struct interface *,
+ const struct prefix *);
+extern struct connected *connected_lookup_prefix_exact(struct interface *,
+ const struct prefix *);
+extern unsigned int connected_count_by_family(struct interface *, int family);
+extern struct nbr_connected *nbr_connected_new(void);
+extern void nbr_connected_free(struct nbr_connected *);
+struct nbr_connected *nbr_connected_check(struct interface *, struct prefix *);
+struct connected *connected_get_linklocal(struct interface *ifp);
+
+/* link parameters */
+bool if_link_params_cmp(struct if_link_params *iflp1,
+ struct if_link_params *iflp2);
+void if_link_params_copy(struct if_link_params *dst,
+ struct if_link_params *src);
+struct if_link_params *if_link_params_get(struct interface *);
+struct if_link_params *if_link_params_enable(struct interface *ifp);
+struct if_link_params *if_link_params_init(struct interface *ifp);
+void if_link_params_free(struct interface *);
+
+/* Northbound. */
+struct vty;
+extern void if_vty_config_start(struct vty *vty, struct interface *ifp);
+extern void if_vty_config_end(struct vty *vty);
+extern void if_cmd_init(int (*config_write)(struct vty *));
+extern void if_cmd_init_default(void);
+extern void if_zapi_callbacks(int (*create)(struct interface *ifp),
+ int (*up)(struct interface *ifp),
+ int (*down)(struct interface *ifp),
+ int (*destroy)(struct interface *ifp));
+
+extern void if_new_via_zapi(struct interface *ifp);
+extern void if_up_via_zapi(struct interface *ifp);
+extern void if_down_via_zapi(struct interface *ifp);
+extern void if_destroy_via_zapi(struct interface *ifp);
+
+extern const struct frr_yang_module_info frr_interface_info;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ZEBRA_IF_H */
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