diff options
Diffstat (limited to 'ospfd/ospf_interface.c')
| -rw-r--r-- | ospfd/ospf_interface.c | 59 |
1 files changed, 54 insertions, 5 deletions
diff --git a/ospfd/ospf_interface.c b/ospfd/ospf_interface.c index da08360d..df71fad6 100644 --- a/ospfd/ospf_interface.c +++ b/ospfd/ospf_interface.c @@ -727,6 +727,60 @@ ospf_if_is_enable (struct ospf_interface *oi) return 0; } +void +ospf_if_set_multicast(struct ospf_interface *oi) +{ + if ((oi->state > ISM_Loopback) && + (oi->type != OSPF_IFTYPE_LOOPBACK) && + (oi->type != OSPF_IFTYPE_VIRTUALLINK) && + (OSPF_IF_PARAM(oi, passive_interface) == OSPF_IF_ACTIVE)) + { + /* The interface should belong to the OSPF-all-routers group. */ + if (!CHECK_FLAG(oi->multicast_memberships, MEMBER_ALLROUTERS) && + (ospf_if_add_allspfrouters(oi->ospf, oi->address, + oi->ifp->ifindex) >= 0)) + /* Set the flag only if the system call to join succeeded. */ + SET_FLAG(oi->multicast_memberships, MEMBER_ALLROUTERS); + } + else + { + /* The interface should NOT belong to the OSPF-all-routers group. */ + if (CHECK_FLAG(oi->multicast_memberships, MEMBER_ALLROUTERS)) + { + ospf_if_drop_allspfrouters (oi->ospf, oi->address, oi->ifp->ifindex); + /* Unset the flag regardless of whether the system call to leave + the group succeeded, since it's much safer to assume that + we are not a member. */ + UNSET_FLAG(oi->multicast_memberships, MEMBER_ALLROUTERS); + } + } + + if (((oi->type == OSPF_IFTYPE_BROADCAST) || + (oi->type == OSPF_IFTYPE_POINTOPOINT)) && + ((oi->state == ISM_DR) || (oi->state == ISM_Backup)) && + (OSPF_IF_PARAM(oi, passive_interface) == OSPF_IF_ACTIVE)) + { + /* The interface should belong to the OSPF-designated-routers group. */ + if (!CHECK_FLAG(oi->multicast_memberships, MEMBER_DROUTERS) && + (ospf_if_add_alldrouters(oi->ospf, oi->address, + oi->ifp->ifindex) >= 0)) + /* Set the flag only if the system call to join succeeded. */ + SET_FLAG(oi->multicast_memberships, MEMBER_DROUTERS); + } + else + { + /* The interface should NOT belong to the OSPF-designated-routers group */ + if (CHECK_FLAG(oi->multicast_memberships, MEMBER_DROUTERS)) + { + ospf_if_drop_alldrouters(oi->ospf, oi->address, oi->ifp->ifindex); + /* Unset the flag regardless of whether the system call to leave + the group succeeded, since it's much safer to assume that + we are not a member. */ + UNSET_FLAG(oi->multicast_memberships, MEMBER_DROUTERS); + } + } +} + int ospf_if_up (struct ospf_interface *oi) { @@ -737,8 +791,6 @@ ospf_if_up (struct ospf_interface *oi) OSPF_ISM_EVENT_SCHEDULE (oi, ISM_LoopInd); else { - if (oi->type != OSPF_IFTYPE_VIRTUALLINK) - ospf_if_add_allspfrouters (oi->ospf, oi->address, oi->ifp->ifindex); ospf_if_stream_set (oi); OSPF_ISM_EVENT_SCHEDULE (oi, ISM_InterfaceUp); } @@ -755,9 +807,6 @@ ospf_if_down (struct ospf_interface *oi) OSPF_ISM_EVENT_EXECUTE (oi, ISM_InterfaceDown); /* Shutdown packet reception and sending */ ospf_if_stream_unset (oi); - if (oi->type != OSPF_IFTYPE_VIRTUALLINK) - ospf_if_drop_allspfrouters (oi->ospf, oi->address, oi->ifp->ifindex); - return 1; } |