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// SPDX-License-Identifier: GPL-2.0-or-later
/* MPLS forwarding table updates using netlink over GNU/Linux system.
* Copyright (C) 2016 Cumulus Networks, Inc.
*/
#include <zebra.h>
#ifdef HAVE_NETLINK
#include "zebra/debug.h"
#include "zebra/rt.h"
#include "zebra/rt_netlink.h"
#include "zebra/zebra_mpls.h"
#include "zebra/kernel_netlink.h"
ssize_t netlink_lsp_msg_encoder(struct zebra_dplane_ctx *ctx, void *buf,
size_t buflen)
{
int cmd;
/* 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));
return -1;
}
cmd = RTM_NEWROUTE;
} else
/* Invalid op? */
return -1;
return netlink_mpls_multipath_msg_encode(cmd, ctx, buf, buflen);
}
enum netlink_msg_status netlink_put_lsp_update_msg(struct nl_batch *bth,
struct zebra_dplane_ctx *ctx)
{
return netlink_batch_add_msg(bth, ctx, netlink_lsp_msg_encoder, false);
}
/*
* 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 netlink_msg_status netlink_put_pw_update_msg(struct nl_batch *bth,
struct zebra_dplane_ctx *ctx)
{
return FRR_NETLINK_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 */
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