[mirror_frr.git] / zebra / zebra_mpls_netlink.c

/* MPLS forwarding table updates using netlink over GNU/Linux system.
 * Copyright (C) 2016  Cumulus Networks, Inc.
 *
 * This file is part of Quagga.
 *
 * Quagga 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.
 *
 * Quagga 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>

#ifdef HAVE_NETLINK

#include "zebra/debug.h"
#include "zebra/rt.h"
#include "zebra/rt_netlink.h"
#include "zebra/zebra_mpls.h"

/*
 * LSP forwarding update using dataplane context information.
 */
enum zebra_dplane_result kernel_lsp_update(struct zebra_dplane_ctx *ctx)
{
	int cmd, ret = -1;

	/* Call to netlink layer based on type of update */
	if (dplane_ctx_get_op(ctx) == DPLANE_OP_LSP_DELETE) {
		cmd = RTM_DELROUTE;
	} else if (dplane_ctx_get_op(ctx) == DPLANE_OP_LSP_INSTALL ||
		   dplane_ctx_get_op(ctx) == DPLANE_OP_LSP_UPDATE) {

		/* Validate */
		if (dplane_ctx_get_best_nhlfe(ctx) == NULL) {
			if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_MPLS)
				zlog_debug("LSP in-label %u: update fails, no best NHLFE",
					   dplane_ctx_get_in_label(ctx));
			goto done;
		}

		cmd = RTM_NEWROUTE;
	} else
		/* Invalid op? */
		goto done;

	ret = netlink_mpls_multipath(cmd, ctx);

done:

	return (ret == 0 ?
		ZEBRA_DPLANE_REQUEST_SUCCESS : ZEBRA_DPLANE_REQUEST_FAILURE);
}

/*
 * Pseudowire update api - not supported by netlink as of 12/18,
 * but note that the default has been to report 'success' for pw updates
 * on unsupported platforms.
 */
enum zebra_dplane_result kernel_pw_update(struct zebra_dplane_ctx *ctx)
{
	return ZEBRA_DPLANE_REQUEST_SUCCESS;
}

int mpls_kernel_init(void)
{
	struct stat st;

	/*
	 * Check if the MPLS module is loaded in the kernel.
	 */
	if (stat("/proc/sys/net/mpls", &st) != 0)
		return -1;

	return 0;
};

#endif /* HAVE_NETLINK */
Commit	Line	Data
3c3877cd DL	1	/* MPLS forwarding table updates using netlink over GNU/Linux system.
	2	* Copyright (C) 2016 Cumulus Networks, Inc.
	3	*
	4	* This file is part of Quagga.
	5	*
	6	* Quagga is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; either version 2, or (at your option) any
	9	* later version.
	10	*
	11	* Quagga 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	*
896014f4 DL	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
3c3877cd DL	19	*/
3c3877cd DL	20
be0dba35	21	#include <zebra.h>
ddfeb486 DL	22
	23	#ifdef HAVE_NETLINK
	24
d37f4d6c	25	#include "zebra/debug.h"
be0dba35 RW	26	#include "zebra/rt.h"
	27	#include "zebra/rt_netlink.h"
	28	#include "zebra/zebra_mpls.h"
	29
d37f4d6c MS	30	/*
	31	* LSP forwarding update using dataplane context information.
	32	*/
16c628de MS	33	enum zebra_dplane_result kernel_lsp_update(struct zebra_dplane_ctx *ctx)
16c628de MS	34	{
d37f4d6c MS	35	int cmd, ret = -1;
	36
	37	/* Call to netlink layer based on type of update */
	38	if (dplane_ctx_get_op(ctx) == DPLANE_OP_LSP_DELETE) {
	39	cmd = RTM_DELROUTE;
	40	} else if (dplane_ctx_get_op(ctx) == DPLANE_OP_LSP_INSTALL \|\|
	41	dplane_ctx_get_op(ctx) == DPLANE_OP_LSP_UPDATE) {
	42
	43	/* Validate */
	44	if (dplane_ctx_get_best_nhlfe(ctx) == NULL) {
	45	if (IS_ZEBRA_DEBUG_KERNEL \|\| IS_ZEBRA_DEBUG_MPLS)
	46	zlog_debug("LSP in-label %u: update fails, no best NHLFE",
	47	dplane_ctx_get_in_label(ctx));
	48	goto done;
	49	}
	50
	51	cmd = RTM_NEWROUTE;
	52	} else
	53	/* Invalid op? */
	54	goto done;
	55
fc608372	56	ret = netlink_mpls_multipath(cmd, ctx);
d37f4d6c MS	57
	58	done:
	59
	60	return (ret == 0 ?
	61	ZEBRA_DPLANE_REQUEST_SUCCESS : ZEBRA_DPLANE_REQUEST_FAILURE);
16c628de MS	62	}
16c628de MS	63
97d8d05a MS	64	/*
	65	* Pseudowire update api - not supported by netlink as of 12/18,
	66	* but note that the default has been to report 'success' for pw updates
	67	* on unsupported platforms.
	68	*/
	69	enum zebra_dplane_result kernel_pw_update(struct zebra_dplane_ctx *ctx)
	70	{
	71	return ZEBRA_DPLANE_REQUEST_SUCCESS;
	72	}
	73
d62a17ae	74	int mpls_kernel_init(void)
fe6c7157	75	{
d62a17ae	76	struct stat st;
fe6c7157	77
d62a17ae	78	/*
	79	* Check if the MPLS module is loaded in the kernel.
	80	*/
	81	if (stat("/proc/sys/net/mpls", &st) != 0)
	82	return -1;
fe6c7157	83
d62a17ae	84	return 0;
fe6c7157	85	};
ddfeb486 DL	86
ddfeb486 DL	87	#endif /* HAVE_NETLINK */