From 2c7cac91ed6e7db0f6937923d2b57f97dbdbc337 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 11:53:30 +0200 Subject: Adding upstream version 8.4.4. Signed-off-by: Daniel Baumann --- zebra/zebra_mpls_netlink.c | 88 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 88 insertions(+) create mode 100644 zebra/zebra_mpls_netlink.c (limited to 'zebra/zebra_mpls_netlink.c') diff --git a/zebra/zebra_mpls_netlink.c b/zebra/zebra_mpls_netlink.c new file mode 100644 index 0000000..ce7702b --- /dev/null +++ b/zebra/zebra_mpls_netlink.c @@ -0,0 +1,88 @@ +/* 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 + +#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 */ -- cgit v1.2.3