diff options
Diffstat (limited to 'ospfd/ospf_abr.c')
| -rw-r--r-- | ospfd/ospf_abr.c | 109 |
1 files changed, 61 insertions, 48 deletions
diff --git a/ospfd/ospf_abr.c b/ospfd/ospf_abr.c index 225cf6ed..88636f1a 100644 --- a/ospfd/ospf_abr.c +++ b/ospfd/ospf_abr.c @@ -409,67 +409,80 @@ ospf_abr_nssa_check_status (struct ospf *ospf) { struct ospf_area *area; struct listnode *lnode, *nnode; - + for (ALL_LIST_ELEMENTS (ospf->areas, lnode, nnode, area)) { - + u_char old_state = area->NSSATranslatorState; + if (area->external_routing != OSPF_AREA_NSSA) continue; - + if (IS_DEBUG_OSPF (nssa, NSSA)) zlog_debug ("ospf_abr_nssa_check_status: " "checking area %s", inet_ntoa (area->area_id)); - + if (!IS_OSPF_ABR (area->ospf)) { if (IS_DEBUG_OSPF (nssa, NSSA)) - zlog_debug ("ospf_abr_nssa_check_status: " - "not ABR"); + zlog_debug ("ospf_abr_nssa_check_status: " + "not ABR"); area->NSSATranslatorState = OSPF_NSSA_TRANSLATE_DISABLED; - continue; } - - switch (area->NSSATranslatorRole) - { - case OSPF_NSSA_ROLE_NEVER: - /* We never Translate Type-7 LSA. */ - /* TODO: check previous state and flush? */ - if (IS_DEBUG_OSPF (nssa, NSSA)) - zlog_debug ("ospf_abr_nssa_check_status: " - "never translate"); - area->NSSATranslatorState = OSPF_NSSA_TRANSLATE_DISABLED; - continue; - - case OSPF_NSSA_ROLE_ALWAYS: - /* We always translate if we are an ABR - * TODO: originate new LSAs if state change? - * or let the nssa abr task take care of it? - */ - if (IS_DEBUG_OSPF (nssa, NSSA)) - zlog_debug ("ospf_abr_nssa_check_status: " - "translate always"); - area->NSSATranslatorState = OSPF_NSSA_TRANSLATE_ENABLED; - continue; - - case OSPF_NSSA_ROLE_CANDIDATE: - /* We are a candidate for Translation */ - if (ospf_abr_nssa_am_elected (area) > 0 ) - { - area->NSSATranslatorState = OSPF_NSSA_TRANSLATE_ENABLED; - if (IS_DEBUG_OSPF (nssa, NSSA)) - zlog_debug ("ospf_abr_nssa_check_status: " - "elected translator"); - } - else - { - area->NSSATranslatorState = OSPF_NSSA_TRANSLATE_DISABLED; - if (IS_DEBUG_OSPF (nssa, NSSA)) - zlog_debug ("ospf_abr_nssa_check_status: " - "not elected"); - } - continue; - } + else + { + switch (area->NSSATranslatorRole) + { + case OSPF_NSSA_ROLE_NEVER: + /* We never Translate Type-7 LSA. */ + /* TODO: check previous state and flush? */ + if (IS_DEBUG_OSPF (nssa, NSSA)) + zlog_debug ("ospf_abr_nssa_check_status: " + "never translate"); + area->NSSATranslatorState = OSPF_NSSA_TRANSLATE_DISABLED; + break; + + case OSPF_NSSA_ROLE_ALWAYS: + /* We always translate if we are an ABR + * TODO: originate new LSAs if state change? + * or let the nssa abr task take care of it? + */ + if (IS_DEBUG_OSPF (nssa, NSSA)) + zlog_debug ("ospf_abr_nssa_check_status: " + "translate always"); + area->NSSATranslatorState = OSPF_NSSA_TRANSLATE_ENABLED; + break; + + case OSPF_NSSA_ROLE_CANDIDATE: + /* We are a candidate for Translation */ + if (ospf_abr_nssa_am_elected (area) > 0) + { + area->NSSATranslatorState = OSPF_NSSA_TRANSLATE_ENABLED; + if (IS_DEBUG_OSPF (nssa, NSSA)) + zlog_debug ("ospf_abr_nssa_check_status: " + "elected translator"); + } + else + { + area->NSSATranslatorState = OSPF_NSSA_TRANSLATE_DISABLED; + if (IS_DEBUG_OSPF (nssa, NSSA)) + zlog_debug ("ospf_abr_nssa_check_status: " "not elected"); + } + break; + } + } + /* RFC3101, 3.1: + * All NSSA border routers must set the E-bit in the Type-1 router-LSAs + * of their directly attached non-stub areas, even when they are not + * translating. + */ + if (old_state != area->NSSATranslatorState) + { + if (old_state == OSPF_NSSA_TRANSLATE_DISABLED) + ospf_asbr_status_update (ospf, ++ospf->redistribute); + else if (area->NSSATranslatorState == OSPF_NSSA_TRANSLATE_DISABLED) + ospf_asbr_status_update (ospf, --ospf->redistribute); + } } } |