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3c3877cd7d
bgpd/bgpd.c had a typo zebra/zebra_mpls_netlink.c was derived from rt_netlink.c isisd/include-netbsd/* are not needed (2 constants moved over) Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
114 lines
2.9 KiB
C
114 lines
2.9 KiB
C
/* MPLS forwarding table updates using netlink over GNU/Linux system.
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* Copyright (C) 2016 Cumulus Networks, Inc.
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*
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* This file is part of Quagga.
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*
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* Quagga is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* Quagga is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Quagga; see the file COPYING. If not, write to the Free
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* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#include <zebra.h>
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#include "zebra/rt.h"
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#include "zebra/rt_netlink.h"
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#include "zebra/zebra_mpls.h"
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/*
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* Install Label Forwarding entry into the kernel.
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*/
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int
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kernel_add_lsp (zebra_lsp_t *lsp)
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{
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int ret;
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if (!lsp || !lsp->best_nhlfe) // unexpected
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return -1;
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UNSET_FLAG (lsp->flags, LSP_FLAG_CHANGED);
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ret = netlink_mpls_multipath (RTM_NEWROUTE, lsp);
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if (!ret)
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SET_FLAG (lsp->flags, LSP_FLAG_INSTALLED);
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else
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clear_nhlfe_installed (lsp);
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return ret;
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}
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/*
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* Update Label Forwarding entry in the kernel. This means that the Label
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* forwarding entry is already installed and needs an update - either a new
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* path is to be added, an installed path has changed (e.g., outgoing label)
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* or an installed path (but not all paths) has to be removed.
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* TODO: Performs a DEL followed by ADD now, need to change to REPLACE. Note
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* that REPLACE was originally implemented for IPv4 nexthops but removed as
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* it was not functioning when moving from swap to PHP as that was signaled
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* through the metric field (before kernel-MPLS). This shouldn't be an issue
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* any longer, so REPLACE can be reintroduced.
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*/
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int
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kernel_upd_lsp (zebra_lsp_t *lsp)
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{
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int ret;
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if (!lsp || !lsp->best_nhlfe) // unexpected
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return -1;
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UNSET_FLAG (lsp->flags, LSP_FLAG_CHANGED);
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/* First issue a DEL and clear the installed flag. */
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netlink_mpls_multipath (RTM_DELROUTE, lsp);
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UNSET_FLAG (lsp->flags, LSP_FLAG_INSTALLED);
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/* Then issue an ADD. */
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ret = netlink_mpls_multipath (RTM_NEWROUTE, lsp);
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if (!ret)
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SET_FLAG (lsp->flags, LSP_FLAG_INSTALLED);
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else
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clear_nhlfe_installed (lsp);
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return ret;
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}
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/*
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* Delete Label Forwarding entry from the kernel.
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*/
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int
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kernel_del_lsp (zebra_lsp_t *lsp)
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{
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if (!lsp) // unexpected
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return -1;
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if (CHECK_FLAG (lsp->flags, LSP_FLAG_INSTALLED))
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{
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netlink_mpls_multipath (RTM_DELROUTE, lsp);
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UNSET_FLAG (lsp->flags, LSP_FLAG_INSTALLED);
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}
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return 0;
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}
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int
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mpls_kernel_init (void)
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{
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struct stat st;
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/*
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* Check if the MPLS module is loaded in the kernel.
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*/
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if (stat ("/proc/sys/net/mpls", &st) != 0)
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return -1;
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return 0;
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};
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