diff options
Diffstat (limited to 'pimd/pim_bfd.c')
| -rw-r--r-- | pimd/pim_bfd.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/pimd/pim_bfd.c b/pimd/pim_bfd.c new file mode 100644 index 0000000..c1f8220 --- /dev/null +++ b/pimd/pim_bfd.c @@ -0,0 +1,135 @@ +/* + * pim_bfd.c: PIM BFD handling routines + * + * Copyright (C) 2017 Cumulus Networks, Inc. + * Chirag Shah + * + * This program 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 of the License, or + * (at your option) any later version. + * + * This program 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 "lib/json.h" +#include "command.h" +#include "vty.h" +#include "zclient.h" + +#include "pim_instance.h" +#include "pim_neighbor.h" +#include "pim_vty.h" +#include "pim_iface.h" +#include "pim_bfd.h" +#include "bfd.h" +#include "pimd.h" +#include "pim_zebra.h" + +/* + * pim_bfd_write_config - Write the interface BFD configuration. + */ +void pim_bfd_write_config(struct vty *vty, struct interface *ifp) +{ + struct pim_interface *pim_ifp = ifp->info; + + if (!pim_ifp || !pim_ifp->bfd_config.enabled) + return; + +#if HAVE_BFDD == 0 + if (pim_ifp->bfd_config.detection_multiplier != BFD_DEF_DETECT_MULT + || pim_ifp->bfd_config.min_rx != BFD_DEF_MIN_RX + || pim_ifp->bfd_config.min_tx != BFD_DEF_MIN_TX) + vty_out(vty, " " PIM_AF_NAME " pim bfd %d %d %d\n", + pim_ifp->bfd_config.detection_multiplier, + pim_ifp->bfd_config.min_rx, pim_ifp->bfd_config.min_tx); + else +#endif /* ! HAVE_BFDD */ + vty_out(vty, " " PIM_AF_NAME " pim bfd\n"); + + if (pim_ifp->bfd_config.profile) + vty_out(vty, " " PIM_AF_NAME " pim bfd profile %s\n", + pim_ifp->bfd_config.profile); +} + +static void pim_neighbor_bfd_cb(struct bfd_session_params *bsp, + const struct bfd_session_status *bss, void *arg) +{ + struct pim_neighbor *nbr = arg; + + if (PIM_DEBUG_PIM_TRACE) { + zlog_debug("%s: status %s old_status %s", __func__, + bfd_get_status_str(bss->state), + bfd_get_status_str(bss->previous_state)); + } + + if (bss->state == BFD_STATUS_DOWN + && bss->previous_state == BFD_STATUS_UP) + pim_neighbor_delete(nbr->interface, nbr, "BFD Session Expired"); +} + +/* + * pim_bfd_info_nbr_create - Create/update BFD information for a neighbor. + */ +void pim_bfd_info_nbr_create(struct pim_interface *pim_ifp, + struct pim_neighbor *neigh) +{ + /* Check if Pim Interface BFD is enabled */ + if (!pim_ifp || !pim_ifp->bfd_config.enabled) + return; + + if (neigh->bfd_session == NULL) + neigh->bfd_session = bfd_sess_new(pim_neighbor_bfd_cb, neigh); + + bfd_sess_set_timers( + neigh->bfd_session, pim_ifp->bfd_config.detection_multiplier, + pim_ifp->bfd_config.min_rx, pim_ifp->bfd_config.min_tx); +#if PIM_IPV == 4 + bfd_sess_set_ipv4_addrs(neigh->bfd_session, NULL, &neigh->source_addr); +#else + bfd_sess_set_ipv6_addrs(neigh->bfd_session, NULL, &neigh->source_addr); +#endif + bfd_sess_set_interface(neigh->bfd_session, neigh->interface->name); + bfd_sess_set_vrf(neigh->bfd_session, neigh->interface->vrf->vrf_id); + bfd_sess_set_profile(neigh->bfd_session, pim_ifp->bfd_config.profile); + bfd_sess_install(neigh->bfd_session); +} + +/* + * pim_bfd_reg_dereg_all_nbr - Register/Deregister all neighbors associated + * with a interface with BFD through + * zebra for starting/stopping the monitoring of + * the neighbor rechahability. + */ +void pim_bfd_reg_dereg_all_nbr(struct interface *ifp) +{ + struct pim_interface *pim_ifp = NULL; + struct listnode *node = NULL; + struct pim_neighbor *neigh = NULL; + + pim_ifp = ifp->info; + if (!pim_ifp) + return; + + for (ALL_LIST_ELEMENTS_RO(pim_ifp->pim_neighbor_list, node, neigh)) { + if (pim_ifp->bfd_config.enabled) + pim_bfd_info_nbr_create(pim_ifp, neigh); + else + bfd_sess_free(&neigh->bfd_session); + } +} + +void pim_bfd_init(void) +{ + bfd_protocol_integration_init(pim_zebra_zclient_get(), router->master); +} |