mirror_frr/bgpd/bgp_vpn.c

/* VPN Related functions
 * Copyright (C) 2017 6WIND
 *
 * This file is part of FRRouting
 *
 * FRRouting 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.
 *
 * FRRouting 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 "command.h"
#include "prefix.h"
#include "lib/json.h"

#include "bgpd/bgpd.h"
#include "bgpd/bgp_route.h"
#include "bgpd/bgp_table.h"
#include "bgpd/bgp_attr.h"
#include "bgpd/bgp_mplsvpn.h"
#include "bgpd/bgp_vpn.h"

int show_adj_route_vpn(struct vty *vty, struct peer *peer,
		       struct prefix_rd *prd, afi_t afi, safi_t safi,
		       bool use_json)
{
	struct bgp *bgp;
	struct bgp_table *table;
	struct bgp_node *rn;
	struct bgp_node *rm;
	struct bgp_path_info *path;
	int rd_header;
	int header = 1;
	json_object *json = NULL;
	json_object *json_scode = NULL;
	json_object *json_ocode = NULL;
	json_object *json_routes = NULL;
	json_object *json_array = NULL;

	bgp = bgp_get_default();
	if (bgp == NULL) {
		if (!use_json)
			vty_out(vty, "No BGP process is configured\n");
		else
			vty_out(vty, "{}\n");
		return CMD_WARNING;
	}

	if (use_json) {
		json_scode = json_object_new_object();
		json_ocode = json_object_new_object();
		json_routes = json_object_new_object();
		json = json_object_new_object();

		json_object_string_add(json_scode, "suppressed", "s");
		json_object_string_add(json_scode, "damped", "d");
		json_object_string_add(json_scode, "history", "h");
		json_object_string_add(json_scode, "valid", "*");
		json_object_string_add(json_scode, "best", ">");
		json_object_string_add(json_scode, "internal", "i");

		json_object_string_add(json_ocode, "igp", "i");
		json_object_string_add(json_ocode, "egp", "e");
		json_object_string_add(json_ocode, "incomplete", "?");
	}

	for (rn = bgp_table_top(bgp->rib[afi][SAFI_MPLS_VPN]); rn;
	     rn = bgp_route_next(rn)) {
		if (prd && memcmp(rn->p.u.val, prd->val, 8) != 0)
			continue;

		table = bgp_node_get_bgp_table_info(rn);
		if (table == NULL)
			continue;

		if (use_json)
			json_array = json_object_new_array();
		else
			json_array = NULL;

		rd_header = 1;

		for (rm = bgp_table_top(table); rm; rm = bgp_route_next(rm)) {
			path = bgp_node_get_bgp_path_info(rm);
			if (path == NULL)
				continue;

			if (header) {
				if (use_json) {
					json_object_int_add(
						json, "bgpTableVersion", 0);
					json_object_string_add(
						json, "bgpLocalRouterId",
						inet_ntoa(bgp->router_id));
					json_object_object_add(json,
							       "bgpStatusCodes",
							       json_scode);
					json_object_object_add(json,
							       "bgpOriginCodes",
							       json_ocode);
				} else {
					vty_out(vty,
						"BGP table version is 0, local router ID is %s\n",
						inet_ntoa(bgp->router_id));
					vty_out(vty,
						"Status codes: s suppressed, d damped, h history, * valid, > best, i - internal\n");
					vty_out(vty,
						"Origin codes: i - IGP, e - EGP, ? - incomplete\n\n");
					vty_out(vty, V4_HEADER);
				}
				header = 0;
			}

			if (rd_header) {
				uint16_t type;
				struct rd_as rd_as = {0};
				struct rd_ip rd_ip = {0};
#if ENABLE_BGP_VNC
				struct rd_vnc_eth rd_vnc_eth = {0};
#endif
				uint8_t *pnt;

				pnt = rn->p.u.val;

				/* Decode RD type. */
				type = decode_rd_type(pnt);
				/* Decode RD value. */
				if (type == RD_TYPE_AS)
					decode_rd_as(pnt + 2, &rd_as);
				else if (type == RD_TYPE_AS4)
					decode_rd_as4(pnt + 2, &rd_as);
				else if (type == RD_TYPE_IP)
					decode_rd_ip(pnt + 2, &rd_ip);
#if ENABLE_BGP_VNC
				else if (type == RD_TYPE_VNC_ETH)
					decode_rd_vnc_eth(pnt, &rd_vnc_eth);
#endif
				if (use_json) {
					char buffer[BUFSIZ];
					if (type == RD_TYPE_AS
					    || type == RD_TYPE_AS4)
						sprintf(buffer, "%u:%d",
							rd_as.as, rd_as.val);
					else if (type == RD_TYPE_IP)
						sprintf(buffer, "%s:%d",
							inet_ntoa(rd_ip.ip),
							rd_ip.val);
					json_object_string_add(
						json_routes,
						"routeDistinguisher", buffer);
				} else {
					vty_out(vty, "Route Distinguisher: ");

					if (type == RD_TYPE_AS
					    || type == RD_TYPE_AS4)
						vty_out(vty, "%u:%d", rd_as.as,
							rd_as.val);
					else if (type == RD_TYPE_IP)
						vty_out(vty, "%s:%d",
							inet_ntoa(rd_ip.ip),
							rd_ip.val);
#if ENABLE_BGP_VNC
					else if (type == RD_TYPE_VNC_ETH)
						vty_out(vty,
							"%u:%02x:%02x:%02x:%02x:%02x:%02x",
							rd_vnc_eth.local_nve_id,
							rd_vnc_eth.macaddr
								.octet[0],
							rd_vnc_eth.macaddr
								.octet[1],
							rd_vnc_eth.macaddr
								.octet[2],
							rd_vnc_eth.macaddr
								.octet[3],
							rd_vnc_eth.macaddr
								.octet[4],
							rd_vnc_eth.macaddr
								.octet[5]);
#endif

					vty_out(vty, "\n");
				}
				rd_header = 0;
			}
			if (use_json) {
				char buf[BUFSIZ];

				prefix2str(&rm->p, buf, sizeof(buf));
				json_object_object_add(json_routes, buf,
						       json_array);
			} else {
				route_vty_out_tmp(vty, &rm->p, path->attr,
						  SAFI_MPLS_VPN, use_json,
						  json_array);
			}
		}
	}
	if (use_json) {
		json_object_object_add(json, "routes", json_routes);
		vty_out(vty, "%s\n", json_object_to_json_string_ext(
					     json, JSON_C_TO_STRING_PRETTY));
		json_object_free(json);
	}
	return CMD_SUCCESS;
}