#define OSPF_DEBUG_DEFAULTINFO 0x20
#define OSPF_DEBUG_LDP_SYNC 0x40
+#define OSPF_DEBUG_GR_HELPER 0x01
+#define OSPF_DEBUG_GR 0x03
+
/* Macro for setting debug option. */
#define CONF_DEBUG_PACKET_ON(a, b) conf_debug_ospf_packet[a] |= (b)
#define CONF_DEBUG_PACKET_OFF(a, b) conf_debug_ospf_packet[a] &= ~(b)
#define IS_DEBUG_OSPF_DEFAULT_INFO IS_DEBUG_OSPF(defaultinfo, DEFAULTINFO)
#define IS_DEBUG_OSPF_LDP_SYNC IS_DEBUG_OSPF(ldp_sync, LDP_SYNC)
+#define IS_DEBUG_OSPF_GR_HELPER IS_DEBUG_OSPF(gr, GR_HELPER)
#define IS_CONF_DEBUG_OSPF_PACKET(a, b) \
(conf_debug_ospf_packet[a] & OSPF_DEBUG_##b)
extern unsigned long term_debug_ospf_sr;
extern unsigned long term_debug_ospf_defaultinfo;
extern unsigned long term_debug_ospf_ldp_sync;
+extern unsigned long term_debug_ospf_gr;
/* Message Strings. */
extern char *ospf_lsa_type_str[];
--- /dev/null
+/*
+ * OSPF Graceful Restart helper functions.
+ *
+ * Copyright (C) 2020-21 Vmware, Inc.
+ * Rajesh Kumar Girada
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra 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.
+ *
+ * GNU Zebra 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
+ */
+
+#ifndef _ZEBRA_OSPF_HELPER_H
+#define _ZEBRA_OSPF_HELPER_H
+
+#define OSPF_GR_NOT_HELPER 0
+#define OSPF_GR_ACTIVE_HELPER 1
+
+#define OSPF_GR_HELPER_NO_LSACHECK 0
+#define OSPF_GR_HELPER_LSACHECK 1
+
+#define OSPF_MAX_GRACE_INTERVAL 1800
+#define OSPF_MIN_GRACE_INTERVAL 1
+
+enum ospf_helper_exit_reason {
+ OSPF_GR_HELPER_EXIT_NONE = 0,
+ OSPF_GR_HELPER_INPROGRESS,
+ OSPF_GR_HELPER_TOPO_CHG,
+ OSPF_GR_HELPER_GRACE_TIMEOUT,
+ OSPF_GR_HELPER_COMPLETED
+};
+
+enum ospf_gr_restart_reason {
+ OSPF_GR_UNKNOWN_RESTART = 0,
+ OSPF_GR_SW_RESTART = 1,
+ OSPF_GR_SW_UPGRADE = 2,
+ OSPF_GR_SWITCH_REDUNDANT_CARD = 3,
+ OSPF_GR_INVALID_REASON_CODE = 4
+};
+
+enum ospf_gr_helper_rejected_reason {
+ OSPF_HELPER_REJECTED_NONE,
+ OSPF_HELPER_SUPPORT_DISABLED,
+ OSPF_HELPER_NOT_A_VALID_NEIGHBOUR,
+ OSPF_HELPER_PLANNED_ONLY_RESTART,
+ OSPF_HELPER_TOPO_CHANGE_RTXMT_LIST,
+ OSPF_HELPER_LSA_AGE_MORE
+};
+
+/* Ref RFC3623 appendex-A */
+/* Grace period TLV */
+#define GRACE_PERIOD_TYPE 1
+#define GRACE_PERIOD_LENGTH 4
+
+struct grace_tlv_graceperiod {
+ struct tlv_header header;
+ uint32_t interval;
+};
+
+/* Restart reason TLV */
+#define RESTART_REASON_TYPE 2
+#define RESTART_REASON_LENGTH 1
+
+struct grace_tlv_restart_reason {
+ struct tlv_header header;
+ uint8_t reason;
+ uint8_t reserved[3];
+};
+
+/* Restarter ip address TLV */
+#define RESTARTER_IP_ADDR_TYPE 3
+#define RESTARTER_IP_ADDR_LEN 4
+
+struct grace_tlv_restart_addr {
+ struct tlv_header header;
+ struct in_addr addr;
+};
+
+struct ospf_helper_info {
+
+ /* Grace interval received from
+ * Restarting Router.
+ */
+ uint32_t recvd_grace_period;
+
+ /* Grace interval used for grace
+ * gracetimer.
+ */
+ uint32_t actual_grace_period;
+
+ /* Grace timer,This Router acts as
+ * helper until this timer until
+ * this timer expires*/
+ struct thread *t_grace_timer;
+
+ /* Helper status */
+ uint32_t gr_helper_status;
+
+ /* Helper exit reason*/
+ enum ospf_helper_exit_reason helper_exit_reason;
+
+ /* Planned/Unplanned restart*/
+ enum ospf_gr_restart_reason gr_restart_reason;
+
+ /* Helper rejected reason */
+ enum ospf_gr_helper_rejected_reason rejected_reason;
+};
+
+struct advRtr {
+ struct in_addr advRtrAddr;
+};
+
+#define OSPF_HELPER_ENABLE_RTR_COUNT(ospf) (ospf->enable_rtr_list->count)
+
+/* Check for planned restart */
+#define OSPF_GR_IS_PLANNED_RESTART(reason) \
+ ((reason == OSPF_GR_SW_RESTART) || (reason == OSPF_GR_SW_UPGRADE))
+
+/* Check the router is HELPER for current neighbour */
+#define OSPF_GR_IS_ACTIVE_HELPER(N) \
+ ((N)->gr_helper_info.gr_helper_status == OSPF_GR_ACTIVE_HELPER)
+
+/* Check the LSA is GRACE LSA */
+#define IS_GRACE_LSA(lsa) \
+ ((lsa->data->type == OSPF_OPAQUE_LINK_LSA) \
+ && (GET_OPAQUE_TYPE(ntohl(lsa->data->id.s_addr)) \
+ == OPAQUE_TYPE_GRACE_LSA))
+
+/* Check neighbour is in FULL state */
+#define IS_NBR_STATE_FULL(nbr) (nsm_should_adj(nbr) && (nbr->state == NSM_Full))
+
+/* Check neighbour is DR_OTHER and state is 2_WAY */
+#define IS_NBR_STATE_2_WAY_WITH_DROTHER(nbr) \
+ ((ospf_get_nbr_ism_role(nbr) == ISM_DROther) \
+ && (nbr->state == NSM_TwoWay))
+
+#define OSPF_GR_FALSE false
+#define OSPF_GR_TRUE true
+
+#define OSPF_GR_SUCCESS 1
+#define OSPF_GR_FAILURE 0
+#define OSPF_GR_INVALID -1
+#endif /* _ZEBRA_OSPF_HELPER_H */
/* Redistributed external information. */
struct list *external[ZEBRA_ROUTE_MAX + 1];
-#define EXTERNAL_INFO(E) (E->external_info)
+#define EXTERNAL_INFO(E) (E->external_info)
+
+ /* Gracefull restart Helper supported configs*/
+ /* Supported grace interval*/
+ uint32_t supported_grace_time;
+
+ /* Helper support
+ * Supported : True
+ * Not Supported : False.
+ */
+ bool is_helper_supported;
+
+ /* Support for strict LSA check.
+ * if it is set,Helper aborted
+ * upon a TOPO change.
+ */
+ bool strict_lsa_check;
+
+ /* Support as HELPER only for
+ * planned restarts.
+ */
+ bool only_planned_restart;
+
+ /* This list contains the advertisement
+ * routerids which are not support for HELPERs.
+ */
+ struct hash *enable_rtr_list;
+
+ /* HELPER for number of active
+ * RESTARTERs.
+ */
+ uint16_t active_restarter_cnt;
+
+ /* last HELPER exit reason */
+ uint32_t last_exit_reason;
/* MPLS LDP-IGP Sync */
struct ldp_sync_info_cmd ldp_sync_cmd;
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