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Diffstat (limited to 'isisd/fabricd.c')
| -rw-r--r-- | isisd/fabricd.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/isisd/fabricd.c b/isisd/fabricd.c new file mode 100644 index 0000000000..d37e6a71d8 --- /dev/null +++ b/isisd/fabricd.c @@ -0,0 +1,136 @@ +/* + * IS-IS Rout(e)ing protocol - OpenFabric extensions + * + * Copyright (C) 2018 Christian Franke + * + * This file is part of FreeRangeRouting (FRR) + * + * FRR 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. + * + * FRR 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 "isisd/fabricd.h" +#include "isisd/isisd.h" +#include "isisd/isis_memory.h" +#include "isisd/isis_circuit.h" +#include "isisd/isis_misc.h" +#include "isisd/isis_adjacency.h" + +DEFINE_MTYPE_STATIC(ISISD, FABRICD_STATE, "ISIS OpenFabric") + +/* Tracks initial synchronization as per section 2.4 + * + * We declare the sync complete once we have seen at least one + * CSNP and there are no more LSPs with SSN or SRM set. + */ +enum fabricd_sync_state { + FABRICD_SYNC_PENDING, + FABRICD_SYNC_STARTED, + FABRICD_SYNC_COMPLETE +}; + +struct fabricd { + enum fabricd_sync_state initial_sync_state; + time_t initial_sync_start; + struct isis_circuit *initial_sync_circuit; + struct thread *initial_sync_timeout; +}; + +struct fabricd *fabricd_new(void) +{ + struct fabricd *rv = XCALLOC(MTYPE_FABRICD_STATE, sizeof(*rv)); + + rv->initial_sync_state = FABRICD_SYNC_PENDING; + return rv; +}; + +static int fabricd_initial_sync_timeout(struct thread *thread) +{ + struct fabricd *f = THREAD_ARG(thread); + + zlog_info("OpenFabric: Initial synchronization on %s timed out!", + f->initial_sync_circuit->interface->name); + f->initial_sync_state = FABRICD_SYNC_PENDING; + f->initial_sync_circuit = NULL; + f->initial_sync_timeout = NULL; + return 0; +} + +void fabricd_initial_sync_hello(struct isis_circuit *circuit) +{ + struct fabricd *f = circuit->area->fabricd; + + if (!f) + return; + + if (f->initial_sync_state > FABRICD_SYNC_PENDING) + return; + + f->initial_sync_state = FABRICD_SYNC_STARTED; + + long timeout = 2 * circuit->hello_interval[1] * circuit->hello_multiplier[1]; + + f->initial_sync_circuit = circuit; + if (f->initial_sync_timeout) + return; + + thread_add_timer(master, fabricd_initial_sync_timeout, f, + timeout, &f->initial_sync_timeout); + f->initial_sync_start = monotime(NULL); + + zlog_info("OpenFabric: Started initial synchronization with %s on %s", + sysid_print(circuit->u.p2p.neighbor->sysid), + circuit->interface->name); +} + +bool fabricd_initial_sync_is_in_progress(struct isis_area *area) +{ + struct fabricd *f = area->fabricd; + + if (!f) + return false; + + if (f->initial_sync_state > FABRICD_SYNC_PENDING + && f->initial_sync_state < FABRICD_SYNC_COMPLETE) + return true; + + return false; +} + +struct isis_circuit *fabricd_initial_sync_circuit(struct isis_area *area) +{ + struct fabricd *f = area->fabricd; + if (!f) + return NULL; + + return f->initial_sync_circuit; +} + +void fabricd_initial_sync_finish(struct isis_area *area) +{ + struct fabricd *f = area->fabricd; + + if (!f) + return; + + if (monotime(NULL) - f->initial_sync_start < 5) + return; + + zlog_info("OpenFabric: Initial synchronization on %s complete.", + f->initial_sync_circuit->interface->name); + f->initial_sync_state = FABRICD_SYNC_COMPLETE; + f->initial_sync_circuit = NULL; + thread_cancel(f->initial_sync_timeout); + f->initial_sync_timeout = NULL; +} |