path: root/pbrd/pbr_vty.c

/*
 * PBR - vty code
 * Copyright (C) 2018 Cumulus Networks, Inc.
 *               Donald Sharp
 *
 * FRR is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 * FRR is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; see the file COPYING; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */
#include <zebra.h>

#include "vty.h"
#include "command.h"
#include "prefix.h"
#include "vrf.h"
#include "nexthop.h"
#include "nexthop_group.h"
#include "nexthop_group_private.h"
#include "log.h"
#include "debug.h"
#include "pbr.h"

#include "pbrd/pbr_nht.h"
#include "pbrd/pbr_map.h"
#include "pbrd/pbr_zebra.h"
#include "pbrd/pbr_vty.h"
#include "pbrd/pbr_debug.h"
#ifndef VTYSH_EXTRACT_PL
#include "pbrd/pbr_vty_clippy.c"
#endif

DEFUN_NOSH(pbr_map, pbr_map_cmd, "pbr-map PBRMAP seq (1-700)",
	   "Create pbr-map or enter pbr-map command mode\n"
	   "The name of the PBR MAP\n"
	   "Sequence to insert in existing pbr-map entry\n"
	   "Sequence number\n")
{
	const char *pbrm_name = argv[1]->arg;
	uint32_t seqno = atoi(argv[3]->arg);
	struct pbr_map_sequence *pbrms;

	pbrms = pbrms_get(pbrm_name, seqno);
	VTY_PUSH_CONTEXT(PBRMAP_NODE, pbrms);

	return CMD_SUCCESS;
}

DEFUN_NOSH(no_pbr_map, no_pbr_map_cmd, "no pbr-map PBRMAP [seq (1-700)]",
	   NO_STR
	   "Delete pbr-map\n"
	   "The name of the PBR MAP\n"
	   "Sequence to delete from existing pbr-map entry\n"
	   "Sequence number\n")
{
	const char *pbrm_name = argv[2]->arg;
	uint32_t seqno = 0;
	struct pbr_map *pbrm = pbrm_find(pbrm_name);
	struct pbr_map_sequence *pbrms;
	struct listnode *node, *next_node;

	if (argc > 3)
		seqno = atoi(argv[4]->arg);

	if (!pbrm) {
		vty_out(vty, "pbr-map %s not found\n", pbrm_name);
		return CMD_SUCCESS;
	}

	for (ALL_LIST_ELEMENTS(pbrm->seqnumbers, node, next_node, pbrms)) {
		if (seqno && pbrms->seqno != seqno)
			continue;

		pbr_map_delete(pbrms);
	}

	return CMD_SUCCESS;
}

DEFPY(pbr_set_table_range,
      pbr_set_table_range_cmd,
      "pbr table range (10000-4294966272)$lb (10000-4294966272)$ub",
      PBR_STR
      "Set table ID range\n"
      "Set table ID range\n"
      "Lower bound for table ID range\n"
      "Upper bound for table ID range\n")
{
	/* upper bound is 2^32 - 2^10 */
	int ret = CMD_WARNING;
	const int minrange = 1000;

	/* validate given bounds */
	if (lb > ub)
		vty_out(vty, "%% Lower bound must be less than upper bound\n");
	else if (ub - lb < minrange)
		vty_out(vty, "%% Range breadth must be at least %d\n", minrange);
	else {
		ret = CMD_SUCCESS;
		pbr_nht_set_tableid_range((uint32_t) lb, (uint32_t) ub);
	}

	return ret;
}

DEFPY(no_pbr_set_table_range, no_pbr_set_table_range_cmd,
      "no pbr table range [(10000-4294966272)$lb (10000-4294966272)$ub]",
      NO_STR
      PBR_STR
      "Set table ID range\n"
      "Set table ID range\n"
      "Lower bound for table ID range\n"
      "Upper bound for table ID range\n")
{
	pbr_nht_set_tableid_range(PBR_NHT_DEFAULT_LOW_TABLEID,
				  PBR_NHT_DEFAULT_HIGH_TABLEID);
	return CMD_SUCCESS;
}

DEFPY(pbr_map_match_src, pbr_map_match_src_cmd,
	"[no] match src-ip <A.B.C.D/M|X:X::X:X/M>$prefix",
	NO_STR
	"Match the rest of the command\n"
	"Choose the src ip or ipv6 prefix to use\n"
	"v4 Prefix\n"
	"v6 Prefix\n")
{
	struct pbr_map_sequence *pbrms = VTY_GET_CONTEXT(pbr_map_sequence);

	pbrms->family = prefix->family;

	if (!no) {
		if (pbrms->src) {
			if (prefix_same(pbrms->src, prefix))
				return CMD_SUCCESS;
		} else
			pbrms->src = prefix_new();

		prefix_copy(pbrms->src, prefix);
	} else
		prefix_free(&pbrms->src);

	pbr_map_check(pbrms, true);

	return CMD_SUCCESS;
}

DEFPY(pbr_map_match_dst, pbr_map_match_dst_cmd,
	"[no] match dst-ip <A.B.C.D/M|X:X::X:X/M>$prefix",
	NO_STR
	"Match the rest of the command\n"
	"Choose the dst ip or ipv6 prefix to use\n"
	"v4 Prefix\n"
	"v6 Prefix\n")
{
	struct pbr_map_sequence *pbrms = VTY_GET_CONTEXT(pbr_map_sequence);

	pbrms->family = prefix->family;

	if (!no) {
		if (pbrms->dst) {
			if (prefix_same(pbrms->dst, prefix))
				return CMD_SUCCESS;
		} else
			pbrms->dst = prefix_new();

		prefix_copy(pbrms->dst, prefix);
	} else
		prefix_free(&pbrms->dst);

	pbr_map_check(pbrms, true);

	return CMD_SUCCESS;
}

DEFPY(pbr_map_match_mark, pbr_map_match_mark_cmd,
	"[no] match mark (1-4294967295)$mark",
	NO_STR
	"Match the rest of the command\n"
	"Choose the mark value to use\n"
	"mark\n")
{
	struct pbr_map_sequence *pbrms = VTY_GET_CONTEXT(pbr_map_sequence);

#ifndef GNU_LINUX
	vty_out(vty, "pbr marks are not supported on this platform");
	return CMD_WARNING_CONFIG_FAILED;
#endif

	if (!no) {
		if (pbrms->mark)
			if (pbrms->mark == (uint32_t)mark)
				return CMD_SUCCESS;

		pbrms->mark = (uint32_t)mark;
	} else
		pbrms->mark = 0;

	pbr_map_check(pbrms, true);

	return CMD_SUCCESS;
}

static void pbrms_clear_set_vrf_config(struct pbr_map_sequence *pbrms)
{
	if (pbrms->vrf_lookup || pbrms->vrf_unchanged) {
		pbr_map_delete_vrf(pbrms);
		pbrms->vrf_name[0] = '\0';
		pbrms->vrf_lookup = false;
		pbrms->vrf_unchanged = false;
	}
}

static void pbrms_clear_set_nhg_config(struct pbr_map_sequence *pbrms)
{
	if (pbrms->nhgrp_name)
		pbr_map_delete_nexthops(pbrms);
}

static void pbrms_clear_set_nexthop_config(struct pbr_map_sequence *pbrms)
{
	if (pbrms->nhg)
		pbr_nht_delete_individual_nexthop(pbrms);
}

static void pbrms_clear_set_config(struct pbr_map_sequence *pbrms)
{
	pbrms_clear_set_vrf_config(pbrms);
	pbrms_clear_set_nhg_config(pbrms);
	pbrms_clear_set_nexthop_config(pbrms);

	pbrms->nhs_installed = false;
}

DEFPY(pbr_map_nexthop_group, pbr_map_nexthop_group_cmd,
      "set nexthop-group NHGNAME$name",
      "Set for the PBR-MAP\n"
      "nexthop-group to use\n"
      "The name of the nexthop-group\n")
{
	struct pbr_map_sequence *pbrms = VTY_GET_CONTEXT(pbr_map_sequence);
	struct nexthop_group_cmd *nhgc;

	nhgc = nhgc_find(name);
	if (!nhgc) {
		vty_out(vty, "Specified nexthop-group %s does not exist\n",
			name);
		vty_out(vty,
			"PBR-MAP will not be applied until it is created\n");
	}

	if (pbrms->nhgrp_name && strcmp(name, pbrms->nhgrp_name) == 0)
		return CMD_SUCCESS;

	/* This is new/replacement config */
	pbrms_clear_set_config(pbrms);

	pbrms->nhgrp_name = XSTRDUP(MTYPE_TMP, name);
	pbr_map_check(pbrms, true);

	return CMD_SUCCESS;
}

DEFPY(no_pbr_map_nexthop_group, no_pbr_map_nexthop_group_cmd,
      "no set nexthop-group [NHGNAME$name]",
      NO_STR
      "Set for the PBR-MAP\n"
      "nexthop-group to use\n"
      "The name of the nexthop-group\n")
{
	struct pbr_map_sequence *pbrms = VTY_GET_CONTEXT(pbr_map_sequence);

	pbrms_clear_set_config(pbrms);

	return CMD_SUCCESS;
}

DEFPY(pbr_map_nexthop, pbr_map_nexthop_cmd,
      "set nexthop\
        <\
	  <A.B.C.D|X:X::X:X>$addr [INTERFACE$intf]\
	  |INTERFACE$intf\
	>\
        [nexthop-vrf NAME$vrf_name]",
      "Set for the PBR-MAP\n"
      "Specify one of the nexthops in this map\n"
      "v4 Address\n"
      "v6 Address\n"
      "Interface to use\n"
      "Interface to use\n"
      "If the nexthop is in a different vrf tell us\n"
      "The nexthop-vrf Name\n")
{
	struct pbr_map_sequence *pbrms = VTY_GET_CONTEXT(pbr_map_sequence);
	struct vrf *vrf;
	struct nexthop nhop;
	struct nexthop *nh = NULL;

	if (vrf_name)
		vrf = vrf_lookup_by_name(vrf_name);
	else
		vrf = vrf_lookup_by_id(VRF_DEFAULT);

	if (!vrf) {
		vty_out(vty, "Specified: %s is non-existent\n", vrf_name);
		return CMD_WARNING_CONFIG_FAILED;
	}

	memset(&nhop, 0, sizeof(nhop));
	nhop.vrf_id = vrf->vrf_id;

	if (intf) {
		nhop.ifindex = ifname2ifindex(intf, vrf->vrf_id);
		if (nhop.ifindex == IFINDEX_INTERNAL) {
			vty_out(vty,
				"Specified Intf %s does not exist in vrf: %s\n",
				intf, vrf->name);
			return CMD_WARNING_CONFIG_FAILED;
		}
	}

	if (addr) {
		if (addr->sa.sa_family == AF_INET) {
			nhop.gate.ipv4.s_addr = addr->sin.sin_addr.s_addr;
			if (intf)
				nhop.type = NEXTHOP_TYPE_IPV4_IFINDEX;
			else
				nhop.type = NEXTHOP_TYPE_IPV4;
		} else {
			nhop.gate.ipv6 = addr->sin6.sin6_addr;
			if (intf)
				nhop.type = NEXTHOP_TYPE_IPV6_IFINDEX;
			else {
				if (IN6_IS_ADDR_LINKLOCAL(&nhop.gate.ipv6)) {
					vty_out(vty,
						"Specified a v6 LL with no interface, rejecting\n");
					return CMD_WARNING_CONFIG_FAILED;
				}
				nhop.type = NEXTHOP_TYPE_IPV6;
			}
		}
	} else
		nhop.type = NEXTHOP_TYPE_IFINDEX;

	if (pbrms->nhg)
		nh = nexthop_exists(pbrms->nhg, &nhop);

	if (nh) /* Same config re-entered */
		goto done;

	/* This is new/replacement config */
	pbrms_clear_set_config(pbrms);

	pbr_nht_add_individual_nexthop(pbrms, &nhop);

	pbr_map_check(pbrms, true);

done:
	if (nhop.type == NEXTHOP_TYPE_IFINDEX
	    || (nhop.type == NEXTHOP_TYPE_IPV6_IFINDEX
		&& IN6_IS_ADDR_LINKLOCAL(&nhop.gate.ipv6))) {
		struct interface *ifp;

		ifp = if_lookup_by_index(nhop.ifindex, nhop.vrf_id);
		if (ifp)
			pbr_nht_nexthop_interface_update(ifp);
	}

	return CMD_SUCCESS;
}

DEFPY(no_pbr_map_nexthop, no_pbr_map_nexthop_cmd,
      "no set nexthop\
        [<\
	  <A.B.C.D|X:X::X:X>$addr [INTERFACE$intf]\
	  |INTERFACE$intf\
	>\
        [nexthop-vrf NAME$vrf_name]]",
      NO_STR
      "Set for the PBR-MAP\n"
      "Specify one of the nexthops in this map\n"
      "v4 Address\n"
      "v6 Address\n"
      "Interface to use\n"
      "Interface to use\n"
      "If the nexthop is in a different vrf tell us\n"
      "The nexthop-vrf Name\n")
{
	struct pbr_map_sequence *pbrms = VTY_GET_CONTEXT(pbr_map_sequence);

	pbrms_clear_set_config(pbrms);

	return CMD_SUCCESS;
}

DEFPY(pbr_map_vrf, pbr_map_vrf_cmd,
      "set vrf <NAME$vrf_name|unchanged>",
      "Set for the PBR-MAP\n"
      "Specify the VRF for this map\n"
      "The VRF Name\n"
      "Use the interface's VRF for lookup\n")
{
	struct pbr_map_sequence *pbrms = VTY_GET_CONTEXT(pbr_map_sequence);

	/*
	 * If an equivalent set vrf * exists, just return success.
	 */
	if (vrf_name && pbrms->vrf_lookup
	    && strncmp(pbrms->vrf_name, vrf_name, sizeof(pbrms->vrf_name)) == 0)
		return CMD_SUCCESS;
	else if (!vrf_name && pbrms->vrf_unchanged) /* Unchanged already set */
		return CMD_SUCCESS;

	if (vrf_name && !pbr_vrf_lookup_by_name(vrf_name)) {
		vty_out(vty, "Specified: %s is non-existent\n", vrf_name);
		return CMD_WARNING_CONFIG_FAILED;
	}

	/* This is new/replacement config */
	pbrms_clear_set_config(pbrms);

	if (vrf_name) {
		pbrms->vrf_lookup = true;
		strlcpy(pbrms->vrf_name, vrf_name, sizeof(pbrms->vrf_name));
	} else
		pbrms->vrf_unchanged = true;

	pbr_map_check(pbrms, true);

	return CMD_SUCCESS;
}

DEFPY(no_pbr_map_vrf, no_pbr_map_vrf_cmd,
      "no set vrf [<NAME$vrf_name|unchanged>]",
      NO_STR
      "Set for the PBR-MAP\n"
      "Specify the VRF for this map\n"
      "The VRF Name\n"
      "Use the interface's VRF for lookup\n")
{
	struct pbr_map_sequence *pbrms = VTY_GET_CONTEXT(pbr_map_sequence);

	pbrms_clear_set_config(pbrms);

	return CMD_SUCCESS;
}

DEFPY (pbr_policy,
	pbr_policy_cmd,
	"[no] pbr-policy PBRMAP$mapname",
	NO_STR
	"Policy to use\n"
	"Name of the pbr-map to apply\n")
{
	VTY_DECLVAR_CONTEXT(interface, ifp);
	struct pbr_map *pbrm, *old_pbrm;
	struct pbr_interface *pbr_ifp = ifp->info;

	old_pbrm = NULL;
	pbrm = pbrm_find(mapname);

	if (!pbr_ifp) {
		/* we don't want one and we don't have one, so... */
		if (no)
			return CMD_SUCCESS;

		/* Some one could have fat fingered the interface name */
		pbr_ifp = pbr_if_new(ifp);
	}

	if (no) {
		if (strcmp(pbr_ifp->mapname, mapname) == 0) {
			pbr_ifp->mapname[0] = '\0';
			if (pbrm)
				pbr_map_interface_delete(pbrm, ifp);
		}
	} else {
		if (strcmp(pbr_ifp->mapname, "") != 0) {
			old_pbrm = pbrm_find(pbr_ifp->mapname);

			/*
			 * So if we have an old pbrm we should only
			 * delete it if we are actually deleting and
			 * moving to a new pbrm
			 */
			if (old_pbrm && old_pbrm != pbrm)
				pbr_map_interface_delete(old_pbrm, ifp);
		}
		snprintf(pbr_ifp->mapname, sizeof(pbr_ifp->mapname),
			 "%s", mapname);

		/*
		 * So only reinstall if the old_pbrm and this pbrm are
		 * different.
		 */
		if (pbrm && pbrm != old_pbrm)
			pbr_map_add_interface(pbrm, ifp);
	}

	return CMD_SUCCESS;
}

DEFPY (show_pbr,
	show_pbr_cmd,
	"show pbr",
	SHOW_STR
	PBR_STR)
{
	pbr_nht_write_table_range(vty);
	pbr_nht_write_rule_range(vty);

	return CMD_SUCCESS;
}

static void vty_show_pbrms(struct vty *vty,
			   const struct pbr_map_sequence *pbrms, bool detail)
{
	char buf[PREFIX_STRLEN];
	char rbuf[64];

	if (pbrms->reason)
		pbr_map_reason_string(pbrms->reason, rbuf, sizeof(rbuf));

	vty_out(vty, "    Seq: %u rule: %u\n", pbrms->seqno, pbrms->ruleno);

	if (detail)
		vty_out(vty, "        Installed: %" PRIu64 "(%u) Reason: %s\n",
			pbrms->installed, pbrms->unique,
			pbrms->reason ? rbuf : "Valid");
	else
		vty_out(vty, "        Installed: %s Reason: %s\n",
			pbrms->installed ? "yes" : "no",
			pbrms->reason ? rbuf : "Valid");

	if (pbrms->src)
		vty_out(vty, "        SRC Match: %s\n",
			prefix2str(pbrms->src, buf, sizeof(buf)));
	if (pbrms->dst)
		vty_out(vty, "        DST Match: %s\n",
			prefix2str(pbrms->dst, buf, sizeof(buf)));
	if (pbrms->mark)
		vty_out(vty, "        MARK Match: %u\n", pbrms->mark);

	if (pbrms->nhgrp_name) {
		vty_out(vty, "        Nexthop-Group: %s\n", pbrms->nhgrp_name);

		if (detail)
			vty_out(vty,
				"          Installed: %u(%d) Tableid: %d\n",
				pbrms->nhs_installed,
				pbr_nht_get_installed(pbrms->nhgrp_name),
				pbr_nht_get_table(pbrms->nhgrp_name));
		else
			vty_out(vty, "          Installed: %s Tableid: %d\n",
				pbr_nht_get_installed(pbrms->nhgrp_name) ? "yes"
									 : "no",
				pbr_nht_get_table(pbrms->nhgrp_name));

	} else if (pbrms->nhg) {
		vty_out(vty, "        ");
		nexthop_group_write_nexthop(vty, pbrms->nhg->nexthop);
		if (detail)
			vty_out(vty,
				"          Installed: %u(%d) Tableid: %d\n",
				pbrms->nhs_installed,
				pbr_nht_get_installed(pbrms->internal_nhg_name),
				pbr_nht_get_table(pbrms->internal_nhg_name));
		else
			vty_out(vty, "          Installed: %s Tableid: %d\n",
				pbr_nht_get_installed(pbrms->internal_nhg_name)
					? "yes"
					: "no",
				pbr_nht_get_table(pbrms->internal_nhg_name));

	} else if (pbrms->vrf_unchanged) {
		vty_out(vty, "        VRF Unchanged (use interface vrf)\n");
	} else if (pbrms->vrf_lookup) {
		vty_out(vty, "        VRF Lookup: %s\n", pbrms->vrf_name);
	} else {
		vty_out(vty, "        Nexthop-Group: Unknown Installed: no\n");
	}
}

static void vty_show_pbr_map(struct vty *vty, const struct pbr_map *pbrm,
			     bool detail)
{
	struct pbr_map_sequence *pbrms;
	struct listnode *node;

	vty_out(vty, "  pbr-map %s valid: %s\n", pbrm->name,
		pbrm->valid ? "yes" : "no");

	for (ALL_LIST_ELEMENTS_RO(pbrm->seqnumbers, node, pbrms))
		vty_show_pbrms(vty, pbrms, detail);
}

DEFPY (show_pbr_map,
	show_pbr_map_cmd,
	"show pbr map [NAME$name] [detail$detail]",
	SHOW_STR
	PBR_STR
	"PBR Map\n"
	"PBR Map Name\n"
	"Detailed information\n")
{
	struct pbr_map *pbrm;

	RB_FOREACH (pbrm, pbr_map_entry_head, &pbr_maps) {
		if (name && strcmp(name, pbrm->name) != 0)
			continue;

		vty_show_pbr_map(vty, pbrm, detail);
	}
	return CMD_SUCCESS;
}

DEFPY(show_pbr_nexthop_group,
      show_pbr_nexthop_group_cmd,
      "show pbr nexthop-groups [WORD$word]",
      SHOW_STR
      PBR_STR
      "Nexthop Groups\n"
      "Optional Name of the nexthop group\n")
{
	pbr_nht_show_nexthop_group(vty, word);

	return CMD_SUCCESS;
}

DEFPY (show_pbr_interface,
	show_pbr_interface_cmd,
	"show pbr interface [NAME$name]",
	SHOW_STR
	PBR_STR
	"PBR Interface\n"
	"PBR Interface Name\n")
{
	struct interface *ifp;
	struct vrf *vrf;
	struct pbr_interface *pbr_ifp;

	RB_FOREACH(vrf, vrf_name_head, &vrfs_by_name) {
		FOR_ALL_INTERFACES(vrf, ifp) {
			struct pbr_map *pbrm;

			if (!ifp->info)
				continue;

			if (name && strcmp(ifp->name, name) != 0)
				continue;

			pbr_ifp = ifp->info;

			if (strcmp(pbr_ifp->mapname, "") == 0)
				continue;

			pbrm = pbrm_find(pbr_ifp->mapname);
			vty_out(vty, "  %s(%d) with pbr-policy %s", ifp->name,
				ifp->ifindex, pbr_ifp->mapname);
			if (!pbrm)
				vty_out(vty, " (map doesn't exist)");
			vty_out(vty, "\n");
		}
	}

	return CMD_SUCCESS;
}

/* PBR debugging CLI ------------------------------------------------------- */

static struct cmd_node debug_node = {
	.node = DEBUG_NODE,
	.prompt = "",
	.config_write = pbr_debug_config_write,
};

DEFPY(debug_pbr,
      debug_pbr_cmd,
      "[no] debug pbr [{map$map|zebra$zebra|nht$nht|events$events}]",
      NO_STR
      DEBUG_STR
      PBR_STR
      "Policy maps\n"
      "PBRD <-> Zebra communications\n"
      "Nexthop tracking\n"
      "Events\n")
{
	uint32_t mode = DEBUG_NODE2MODE(vty->node);

	if (map)
		DEBUG_MODE_SET(&pbr_dbg_map, mode, !no);
	if (zebra)
		DEBUG_MODE_SET(&pbr_dbg_zebra, mode, !no);
	if (nht)
		DEBUG_MODE_SET(&pbr_dbg_nht, mode, !no);
	if (events)
		DEBUG_MODE_SET(&pbr_dbg_event, mode, !no);

	/* no specific debug --> act on all of them */
	if (strmatch(argv[argc - 1]->text, "pbr"))
		pbr_debug_set_all(mode, !no);

	return CMD_SUCCESS;
}

DEFUN_NOSH(show_debugging_pbr,
	   show_debugging_pbr_cmd,
	   "show debugging [pbr]",
	   SHOW_STR
	   DEBUG_STR
	   PBR_STR)
{
	vty_out(vty, "PBR debugging status:\n");

	pbr_debug_config_write_helper(vty, false);

	return CMD_SUCCESS;
}

/* ------------------------------------------------------------------------- */


static int pbr_interface_config_write(struct vty *vty);
static struct cmd_node interface_node = {
	.node = INTERFACE_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-if)# ",
	.config_write = pbr_interface_config_write,
};

static int pbr_interface_config_write(struct vty *vty)
{
	struct interface *ifp;
	struct vrf *vrf;

	RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) {
		FOR_ALL_INTERFACES (vrf, ifp) {
			if (vrf->vrf_id == VRF_DEFAULT)
				vty_frame(vty, "interface %s\n", ifp->name);
			else
				vty_frame(vty, "interface %s vrf %s\n",
					  ifp->name, vrf->name);

			if (ifp->desc)
				vty_out(vty, " description %s\n", ifp->desc);

			pbr_map_write_interfaces(vty, ifp);

			vty_endframe(vty, "!\n");
		}
	}

	return 1;
}

static int pbr_vty_map_config_write(struct vty *vty);
/* PBR map node structure. */
static struct cmd_node pbr_map_node = {
	.node = PBRMAP_NODE,
	.parent_node = CONFIG_NODE,
	.prompt = "%s(config-pbr-map)# ",
	.config_write = pbr_vty_map_config_write,
};

static int pbr_vty_map_config_write_sequence(struct vty *vty,
					     struct pbr_map *pbrm,
					     struct pbr_map_sequence *pbrms)
{
	char buff[PREFIX_STRLEN];

	vty_out(vty, "pbr-map %s seq %u\n", pbrm->name, pbrms->seqno);

	if (pbrms->src)
		vty_out(vty, " match src-ip %s\n",
			prefix2str(pbrms->src, buff, sizeof(buff)));

	if (pbrms->dst)
		vty_out(vty, " match dst-ip %s\n",
			prefix2str(pbrms->dst, buff, sizeof(buff)));

	if (pbrms->mark)
		vty_out(vty, " match mark %u\n", pbrms->mark);

	if (pbrms->vrf_unchanged)
		vty_out(vty, " set vrf unchanged\n");

	if (pbrms->vrf_lookup)
		vty_out(vty, " set vrf %s\n", pbrms->vrf_name);

	if (pbrms->nhgrp_name)
		vty_out(vty, " set nexthop-group %s\n", pbrms->nhgrp_name);

	if (pbrms->nhg) {
		vty_out(vty, " set ");
		nexthop_group_write_nexthop(vty, pbrms->nhg->nexthop);
	}

	vty_out(vty, "!\n");
	return 1;
}

static int pbr_vty_map_config_write(struct vty *vty)
{
	struct pbr_map *pbrm;

	pbr_nht_write_table_range(vty);
	pbr_nht_write_rule_range(vty);

	RB_FOREACH(pbrm, pbr_map_entry_head, &pbr_maps) {
		struct pbr_map_sequence *pbrms;
		struct listnode *node;

		for (ALL_LIST_ELEMENTS_RO(pbrm->seqnumbers, node, pbrms))
			pbr_vty_map_config_write_sequence(vty, pbrm, pbrms);
	}

	return 1;
}

static void pbr_map_completer(vector comps, struct cmd_token *token)
{
	struct pbr_map *pbrm;

	RB_FOREACH (pbrm, pbr_map_entry_head, &pbr_maps)
		vector_set(comps, XSTRDUP(MTYPE_COMPLETION, pbrm->name));
}

static const struct cmd_variable_handler pbr_map_name[] = {
	{
		.tokenname = "PBRMAP", .completions = pbr_map_completer,
	},
	{
		.completions = NULL
	}
};

void pbr_vty_init(void)
{
	cmd_variable_handler_register(pbr_map_name);

	install_node(&interface_node);
	if_cmd_init();

	install_node(&pbr_map_node);

	/* debug */
	install_node(&debug_node);
	install_element(VIEW_NODE, &debug_pbr_cmd);
	install_element(CONFIG_NODE, &debug_pbr_cmd);
	install_element(VIEW_NODE, &show_debugging_pbr_cmd);

	install_default(PBRMAP_NODE);

	install_element(CONFIG_NODE, &pbr_map_cmd);
	install_element(CONFIG_NODE, &no_pbr_map_cmd);
	install_element(CONFIG_NODE, &pbr_set_table_range_cmd);
	install_element(CONFIG_NODE, &no_pbr_set_table_range_cmd);
	install_element(INTERFACE_NODE, &pbr_policy_cmd);
	install_element(PBRMAP_NODE, &pbr_map_match_src_cmd);
	install_element(PBRMAP_NODE, &pbr_map_match_dst_cmd);
	install_element(PBRMAP_NODE, &pbr_map_match_mark_cmd);
	install_element(PBRMAP_NODE, &pbr_map_nexthop_group_cmd);
	install_element(PBRMAP_NODE, &no_pbr_map_nexthop_group_cmd);
	install_element(PBRMAP_NODE, &pbr_map_nexthop_cmd);
	install_element(PBRMAP_NODE, &no_pbr_map_nexthop_cmd);
	install_element(PBRMAP_NODE, &pbr_map_vrf_cmd);
	install_element(PBRMAP_NODE, &no_pbr_map_vrf_cmd);
	install_element(VIEW_NODE, &show_pbr_cmd);
	install_element(VIEW_NODE, &show_pbr_map_cmd);
	install_element(VIEW_NODE, &show_pbr_interface_cmd);
	install_element(VIEW_NODE, &show_pbr_nexthop_group_cmd);
}