2 * ospf6_bfd.c: IPv6 OSPF BFD handling routines
4 * @copyright Copyright (C) 2015 Cumulus Networks, Inc.
6 * This file is part of GNU Zebra.
8 * GNU Zebra is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2, or (at your option) any
13 * GNU Zebra is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; see the file COPYING; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
38 #include "ospf6_message.h"
39 #include "ospf6_neighbor.h"
40 #include "ospf6_interface.h"
41 #include "ospf6_route.h"
42 #include "ospf6_zebra.h"
43 #include "ospf6_bfd.h"
45 extern struct zclient
*zclient
;
48 * ospf6_bfd_info_free - Free BFD info structure
51 ospf6_bfd_info_free(void **bfd_info
)
53 bfd_info_free((struct bfd_info
**) bfd_info
);
57 * ospf6_bfd_show_info - Show BFD info structure
60 ospf6_bfd_show_info(struct vty
*vty
, void *bfd_info
, int param_only
)
63 bfd_show_param(vty
, bfd_info
, 1, 0, 0, NULL
);
65 bfd_show_info(vty
, bfd_info
, 0, 1, 0, NULL
);
69 * ospf6_bfd_reg_dereg_nbr - Register/Deregister a neighbor with BFD through
70 * zebra for starting/stopping the monitoring of
71 * the neighbor rechahability.
74 ospf6_bfd_reg_dereg_nbr (struct ospf6_neighbor
*on
, int command
)
76 struct ospf6_interface
*oi
= on
->ospf6_if
;
77 struct interface
*ifp
= oi
->interface
;
78 struct bfd_info
*bfd_info
;
81 if (!oi
->bfd_info
|| !on
->bfd_info
)
83 bfd_info
= (struct bfd_info
*)oi
->bfd_info
;
85 if (IS_OSPF6_DEBUG_ZEBRA(SEND
))
87 inet_ntop (AF_INET6
, &on
->linklocal_addr
, src
, sizeof (src
));
88 zlog_debug ("%s nbr (%s) with BFD",
89 bfd_get_command_dbg_str(command
), src
);
92 bfd_peer_sendmsg (zclient
, bfd_info
, AF_INET6
, &on
->linklocal_addr
,
93 on
->ospf6_if
->linklocal_addr
, ifp
->name
,
94 0, 0, command
, 0, VRF_DEFAULT
);
96 if (command
== ZEBRA_BFD_DEST_DEREGISTER
)
97 bfd_info_free((struct bfd_info
**)&on
->bfd_info
);
101 * ospf6_bfd_trigger_event - Neighbor is registered/deregistered with BFD when
102 * neighbor state is changed to/from 2way.
105 ospf6_bfd_trigger_event(struct ospf6_neighbor
*on
, int old_state
, int state
)
107 if ((old_state
< OSPF6_NEIGHBOR_TWOWAY
) && (state
>= OSPF6_NEIGHBOR_TWOWAY
))
108 ospf6_bfd_reg_dereg_nbr(on
, ZEBRA_BFD_DEST_REGISTER
);
109 else if ((old_state
>= OSPF6_NEIGHBOR_TWOWAY
) &&
110 (state
< OSPF6_NEIGHBOR_TWOWAY
))
111 ospf6_bfd_reg_dereg_nbr(on
, ZEBRA_BFD_DEST_DEREGISTER
);
115 * ospf6_bfd_reg_dereg_all_nbr - Register/Deregister all neighbors associated
116 * with a interface with BFD through
117 * zebra for starting/stopping the monitoring of
118 * the neighbor rechahability.
121 ospf6_bfd_reg_dereg_all_nbr (struct ospf6_interface
*oi
, int command
)
123 struct ospf6_neighbor
*on
;
124 struct listnode
*node
;
126 for (ALL_LIST_ELEMENTS_RO (oi
->neighbor_list
, node
, on
))
128 if (command
== ZEBRA_BFD_DEST_REGISTER
)
129 ospf6_bfd_info_nbr_create(oi
, on
);
131 if (on
->state
< OSPF6_NEIGHBOR_TWOWAY
)
133 if (command
== ZEBRA_BFD_DEST_DEREGISTER
)
134 bfd_info_free((struct bfd_info
**)&on
->bfd_info
);
138 ospf6_bfd_reg_dereg_nbr(on
, command
);
143 * ospf6_bfd_nbr_replay - Replay all the neighbors that have BFD enabled
147 ospf6_bfd_nbr_replay (int command
, struct zclient
*zclient
, zebra_size_t length
,
150 struct listnode
*inode
, *nnode
;
151 struct interface
*ifp
;
152 struct ospf6_interface
*oi
;
153 struct ospf6_neighbor
*on
;
156 if (IS_OSPF6_DEBUG_ZEBRA(RECV
))
157 zlog_debug("Zebra: BFD Dest replay request");
159 /* Send the client registration */
160 bfd_client_sendmsg(zclient
, ZEBRA_BFD_CLIENT_REGISTER
);
162 /* Replay the neighbor, if BFD is enabled on the interface*/
163 for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT
), inode
, ifp
))
165 oi
= (struct ospf6_interface
*) ifp
->info
;
167 if (!oi
|| !oi
->bfd_info
)
170 for (ALL_LIST_ELEMENTS_RO (oi
->neighbor_list
, nnode
, on
))
172 if (on
->state
< OSPF6_NEIGHBOR_TWOWAY
)
175 if (IS_OSPF6_DEBUG_ZEBRA(SEND
))
177 inet_ntop (AF_INET6
, &on
->linklocal_addr
, dst
, sizeof (dst
));
178 zlog_debug ("Replaying nbr (%s) to BFD", dst
);
181 ospf6_bfd_reg_dereg_nbr(on
, ZEBRA_BFD_DEST_UPDATE
);
188 * ospf6_bfd_interface_dest_update - Find the neighbor for which the BFD status
189 * has changed and bring down the neighbor
190 * connectivity if BFD down is received.
193 ospf6_bfd_interface_dest_update (int command
, struct zclient
*zclient
,
194 zebra_size_t length
, vrf_id_t vrf_id
)
196 struct interface
*ifp
;
197 struct ospf6_interface
*oi
;
198 struct ospf6_neighbor
*on
;
201 struct listnode
*node
, *nnode
;
205 struct bfd_info
*bfd_info
;
208 ifp
= bfd_get_peer_info(zclient
->ibuf
, &dp
, &sp
, &status
, vrf_id
);
210 if ((ifp
== NULL
) || (dp
.family
!= AF_INET6
))
213 if (IS_OSPF6_DEBUG_ZEBRA (RECV
))
215 char buf
[PREFIX2STR_BUFFER
];
216 prefix2str(&dp
, buf
, sizeof(buf
));
217 zlog_debug("Zebra: interface %s bfd destination %s %s", ifp
->name
, buf
,
218 bfd_get_status_str(status
));
222 oi
= (struct ospf6_interface
*) ifp
->info
;
223 if (!oi
|| !oi
->bfd_info
)
226 for (ALL_LIST_ELEMENTS (oi
->neighbor_list
, node
, nnode
, on
))
228 if (memcmp(&(on
->linklocal_addr
), &dp
.u
.prefix6
, sizeof(struct in6_addr
)))
231 if (IS_OSPF6_DEBUG_NEIGHBOR (EVENT
))
233 inet_ntop (AF_INET6
, &on
->linklocal_addr
, dst
, sizeof (dst
));
234 zlog_debug ("[%s:%s]: BFD %s", ifp
->name
, dst
,
235 bfd_get_status_str(status
));
241 bfd_info
= (struct bfd_info
*)on
->bfd_info
;
242 if (bfd_info
->status
== status
)
245 old_status
= bfd_info
->status
;
246 bfd_info
->status
= status
;
248 bfd_info
->last_update
= tv
.tv_sec
;
250 if ((status
== BFD_STATUS_DOWN
) && (old_status
== BFD_STATUS_UP
))
252 THREAD_OFF (on
->inactivity_timer
);
253 thread_add_event(master
, inactivity_timer
, on
, 0, NULL
);
261 * ospf6_bfd_info_nbr_create - Create/update BFD information for a neighbor.
264 ospf6_bfd_info_nbr_create (struct ospf6_interface
*oi
,
265 struct ospf6_neighbor
*on
)
267 struct bfd_info
*oi_bfd_info
;
268 struct bfd_info
*on_bfd_info
;
273 oi_bfd_info
= (struct bfd_info
*)oi
->bfd_info
;
276 on
->bfd_info
= bfd_info_create();
278 on_bfd_info
= (struct bfd_info
*)on
->bfd_info
;
279 on_bfd_info
->detect_mult
= oi_bfd_info
->detect_mult
;
280 on_bfd_info
->desired_min_tx
= oi_bfd_info
->desired_min_tx
;
281 on_bfd_info
->required_min_rx
= oi_bfd_info
->required_min_rx
;
285 * ospf6_bfd_write_config - Write the interface BFD configuration.
288 ospf6_bfd_write_config(struct vty
*vty
, struct ospf6_interface
*oi
)
290 struct bfd_info
*bfd_info
;
295 bfd_info
= (struct bfd_info
*)oi
->bfd_info
;
297 if (CHECK_FLAG(bfd_info
->flags
, BFD_FLAG_PARAM_CFG
))
298 vty_out (vty
, " ipv6 ospf6 bfd %d %d %d%s",
299 bfd_info
->detect_mult
, bfd_info
->required_min_rx
,
300 bfd_info
->desired_min_tx
, VTY_NEWLINE
);
302 vty_out (vty
, " ipv6 ospf6 bfd%s", VTY_NEWLINE
);
306 * ospf6_bfd_if_param_set - Set the configured BFD paramter values for
310 ospf6_bfd_if_param_set (struct ospf6_interface
*oi
, u_int32_t min_rx
,
311 u_int32_t min_tx
, u_int8_t detect_mult
,
316 bfd_set_param((struct bfd_info
**)&(oi
->bfd_info
), min_rx
, min_tx
, detect_mult
,
319 ospf6_bfd_reg_dereg_all_nbr(oi
, command
);
322 DEFUN (ipv6_ospf6_bfd
,
327 "Enables BFD support\n"
330 VTY_DECLVAR_CONTEXT(interface
, ifp
);
331 struct ospf6_interface
*oi
;
334 oi
= (struct ospf6_interface
*) ifp
->info
;
336 oi
= ospf6_interface_create (ifp
);
339 ospf6_bfd_if_param_set (oi
, BFD_DEF_MIN_RX
, BFD_DEF_MIN_TX
,
340 BFD_DEF_DETECT_MULT
, 1);
344 DEFUN (ipv6_ospf6_bfd_param
,
345 ipv6_ospf6_bfd_param_cmd
,
346 "ipv6 ospf6 bfd (2-255) (50-60000) (50-60000)",
349 "Enables BFD support\n"
350 "Detect Multiplier\n"
351 "Required min receive interval\n"
352 "Desired min transmit interval\n")
354 VTY_DECLVAR_CONTEXT(interface
, ifp
);
356 int idx_number_2
= 4;
357 int idx_number_3
= 5;
358 struct ospf6_interface
*oi
;
366 oi
= (struct ospf6_interface
*) ifp
->info
;
368 oi
= ospf6_interface_create (ifp
);
371 if ((ret
= bfd_validate_param (vty
, argv
[idx_number
]->arg
, argv
[idx_number_2
]->arg
, argv
[idx_number_3
]->arg
, &dm_val
,
372 &rx_val
, &tx_val
)) != CMD_SUCCESS
)
375 ospf6_bfd_if_param_set (oi
, rx_val
, tx_val
, dm_val
, 0);
380 DEFUN (no_ipv6_ospf6_bfd
,
381 no_ipv6_ospf6_bfd_cmd
,
386 "Disables BFD support\n"
389 VTY_DECLVAR_CONTEXT(interface
, ifp
);
390 struct ospf6_interface
*oi
;
393 oi
= (struct ospf6_interface
*) ifp
->info
;
395 oi
= ospf6_interface_create (ifp
);
400 ospf6_bfd_reg_dereg_all_nbr(oi
, ZEBRA_BFD_DEST_DEREGISTER
);
401 bfd_info_free((struct bfd_info
**)&(oi
->bfd_info
));
412 /* Initialize BFD client functions */
413 zclient
->interface_bfd_dest_update
= ospf6_bfd_interface_dest_update
;
414 zclient
->bfd_dest_replay
= ospf6_bfd_nbr_replay
;
416 /* Install BFD command */
417 install_element (INTERFACE_NODE
, &ipv6_ospf6_bfd_cmd
);
418 install_element (INTERFACE_NODE
, &ipv6_ospf6_bfd_param_cmd
);
419 install_element (INTERFACE_NODE
, &no_ipv6_ospf6_bfd_cmd
);