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acddc0ed3c
Done with a combination of regex'ing and banging my head against a wall. Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
164 lines
4.9 KiB
C
164 lines
4.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* OSPF6 Graceful Retsart helper functions.
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*
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* Copyright (C) 2021-22 Vmware, Inc.
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* Rajesh Kumar Girada
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*/
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#ifndef OSPF6_GR_H
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#define OSPF6_GR_H
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#define OSPF6_GR_NOT_HELPER 0
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#define OSPF6_GR_ACTIVE_HELPER 1
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#define OSPF6_GR_HELPER_NO_LSACHECK 0
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#define OSPF6_GR_HELPER_LSACHECK 1
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#define OSPF6_MAX_GRACE_INTERVAL 1800
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#define OSPF6_MIN_GRACE_INTERVAL 1
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#define OSPF6_DFLT_GRACE_INTERVAL 120
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/* Forward declaration(s). */
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struct ospf6_neighbor;
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/* Debug option */
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extern unsigned char conf_debug_ospf6_gr;
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#define OSPF6_DEBUG_GR 0x01
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#define OSPF6_DEBUG_GR_ON() (conf_debug_ospf6_gr |= OSPF6_DEBUG_GR)
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#define OSPF6_DEBUG_GR_OFF() (conf_debug_ospf6_gr &= ~OSPF6_DEBUG_GR)
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#define IS_DEBUG_OSPF6_GR conf_debug_ospf6_gr
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enum ospf6_helper_exit_reason {
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OSPF6_GR_HELPER_EXIT_NONE = 0,
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OSPF6_GR_HELPER_INPROGRESS,
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OSPF6_GR_HELPER_TOPO_CHG,
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OSPF6_GR_HELPER_GRACE_TIMEOUT,
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OSPF6_GR_HELPER_COMPLETED
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};
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enum ospf6_gr_restart_reason {
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OSPF6_GR_UNKNOWN_RESTART = 0,
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OSPF6_GR_SW_RESTART = 1,
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OSPF6_GR_SW_UPGRADE = 2,
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OSPF6_GR_SWITCH_REDUNDANT_CARD = 3,
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OSPF6_GR_INVALID_REASON_CODE = 4
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};
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enum ospf6_gr_helper_rejected_reason {
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OSPF6_HELPER_REJECTED_NONE,
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OSPF6_HELPER_SUPPORT_DISABLED,
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OSPF6_HELPER_NOT_A_VALID_NEIGHBOUR,
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OSPF6_HELPER_PLANNED_ONLY_RESTART,
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OSPF6_HELPER_TOPO_CHANGE_RTXMT_LIST,
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OSPF6_HELPER_LSA_AGE_MORE,
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OSPF6_HELPER_RESTARTING,
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};
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#ifdef roundup
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#define ROUNDUP(val, gran) roundup(val, gran)
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#else /* roundup */
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#define ROUNDUP(val, gran) (((val)-1 | (gran)-1) + 1)
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#endif /* roundup */
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/*
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* Generic TLV (type, length, value) macros
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*/
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struct tlv_header {
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uint16_t type; /* Type of Value */
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uint16_t length; /* Length of Value portion only, in bytes */
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};
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#define TLV_HDR_SIZE (sizeof(struct tlv_header))
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#define TLV_BODY_SIZE(tlvh) (ROUNDUP(ntohs((tlvh)->length), sizeof(uint32_t)))
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#define TLV_SIZE(tlvh) (uint32_t)(TLV_HDR_SIZE + TLV_BODY_SIZE(tlvh))
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#define TLV_HDR_TOP(lsah) \
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(struct tlv_header *)((char *)(lsah) + OSPF6_LSA_HEADER_SIZE)
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#define TLV_HDR_NEXT(tlvh) \
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(struct tlv_header *)((char *)(tlvh) + TLV_SIZE(tlvh))
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/* Ref RFC5187 appendix-A */
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/* Grace period TLV */
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#define GRACE_PERIOD_TYPE 1
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#define GRACE_PERIOD_LENGTH 4
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struct grace_tlv_graceperiod {
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struct tlv_header header;
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uint32_t interval;
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};
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#define GRACE_PERIOD_TLV_SIZE sizeof(struct grace_tlv_graceperiod)
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/* Restart reason TLV */
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#define RESTART_REASON_TYPE 2
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#define RESTART_REASON_LENGTH 1
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struct grace_tlv_restart_reason {
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struct tlv_header header;
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uint8_t reason;
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uint8_t reserved[3];
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};
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#define GRACE_RESTART_REASON_TLV_SIZE sizeof(struct grace_tlv_restart_reason)
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#define OSPF6_GRACE_LSA_MIN_SIZE \
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GRACE_PERIOD_TLV_SIZE + GRACE_RESTART_REASON_TLV_SIZE
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struct ospf6_grace_lsa {
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struct grace_tlv_graceperiod tlv_period;
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struct grace_tlv_restart_reason tlv_reason;
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};
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struct advRtr {
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in_addr_t advRtrAddr;
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};
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#define OSPF6_HELPER_ENABLE_RTR_COUNT(ospf) \
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(ospf6->ospf6_helper_cfg.enable_rtr_list->count)
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/* Check , it is a planned restart */
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#define OSPF6_GR_IS_PLANNED_RESTART(reason) \
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((reason == OSPF6_GR_SW_RESTART) || (reason == OSPF6_GR_SW_UPGRADE))
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/* Check the router is HELPER for current neighbour */
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#define OSPF6_GR_IS_ACTIVE_HELPER(N) \
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((N)->gr_helper_info.gr_helper_status == OSPF6_GR_ACTIVE_HELPER)
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/* Check the LSA is GRACE LSA */
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#define IS_GRACE_LSA(lsa) (ntohs(lsa->header->type) == OSPF6_LSTYPE_GRACE_LSA)
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/* Check neighbour is in FULL state */
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#define IS_NBR_STATE_FULL(nbr) (nbr->state == OSPF6_NEIGHBOR_FULL)
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extern const char *ospf6_exit_reason_desc[];
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extern const char *ospf6_restart_reason_desc[];
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extern const char *ospf6_rejected_reason_desc[];
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extern void ospf6_gr_helper_config_init(void);
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extern void ospf6_gr_helper_init(struct ospf6 *ospf6);
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extern void ospf6_gr_helper_deinit(struct ospf6 *ospf6);
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extern void ospf6_gr_helper_exit(struct ospf6_neighbor *nbr,
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enum ospf6_helper_exit_reason reason);
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extern int ospf6_process_grace_lsa(struct ospf6 *ospf6, struct ospf6_lsa *lsa,
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struct ospf6_neighbor *nbr);
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extern void ospf6_process_maxage_grace_lsa(struct ospf6 *ospf,
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struct ospf6_lsa *lsa,
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struct ospf6_neighbor *nbr);
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extern void ospf6_helper_handle_topo_chg(struct ospf6 *ospf6,
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struct ospf6_lsa *lsa);
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extern int config_write_ospf6_gr(struct vty *vty, struct ospf6 *ospf6);
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extern int config_write_ospf6_gr_helper(struct vty *vty, struct ospf6 *ospf6);
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extern int config_write_ospf6_debug_gr_helper(struct vty *vty);
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extern void ospf6_gr_check_lsdb_consistency(struct ospf6 *ospf,
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struct ospf6_area *area);
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extern void ospf6_gr_nvm_read(struct ospf6 *ospf);
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extern void ospf6_gr_init(void);
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#endif /* OSPF6_GR_H */
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