/* Unix SMB/CIFS implementation. WINS Replication server Copyright (C) Stefan Metzmacher 2005 This program 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 3 of the License, or (at your option) any later version. This program 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. If not, see <http://www.gnu.org/licenses/>. */ #include "includes.h" #include "librpc/gen_ndr/winsrepl.h" #include "wrepl_server/wrepl_server.h" #include "libcli/composite/composite.h" #include "nbt_server/wins/winsdb.h" static void wreplsrv_out_partner_push(struct wreplsrv_partner *partner, bool propagate); static void wreplsrv_push_handler_creq(struct composite_context *creq) { struct wreplsrv_partner *partner = talloc_get_type(creq->async.private_data, struct wreplsrv_partner); struct wreplsrv_push_notify_io *old_notify_io; partner->push.last_status = wreplsrv_push_notify_recv(partner->push.creq); partner->push.creq = NULL; old_notify_io = partner->push.notify_io; partner->push.notify_io = NULL; if (NT_STATUS_IS_OK(partner->push.last_status)) { partner->push.error_count = 0; DEBUG(2,("wreplsrv_push_notify(%s): %s\n", partner->address, nt_errstr(partner->push.last_status))); goto done; } partner->push.error_count++; if (partner->push.error_count > 1) { DEBUG(1,("wreplsrv_push_notify(%s): %s: error_count: %u: giving up\n", partner->address, nt_errstr(partner->push.last_status), partner->push.error_count)); goto done; } DEBUG(1,("wreplsrv_push_notify(%s): %s: error_count: %u: retry\n", partner->address, nt_errstr(partner->push.last_status), partner->push.error_count)); wreplsrv_out_partner_push(partner, old_notify_io->in.propagate); done: talloc_free(old_notify_io); } static void wreplsrv_out_partner_push(struct wreplsrv_partner *partner, bool propagate) { /* a push for this partner is currently in progress, so we're done */ if (partner->push.creq) return; /* now prepare the push notify */ partner->push.notify_io = talloc(partner, struct wreplsrv_push_notify_io); if (!partner->push.notify_io) { goto nomem; } partner->push.notify_io->in.partner = partner; partner->push.notify_io->in.inform = partner->push.use_inform; partner->push.notify_io->in.propagate = propagate; partner->push.creq = wreplsrv_push_notify_send(partner->push.notify_io, partner->push.notify_io); if (!partner->push.creq) { DEBUG(1,("wreplsrv_push_notify_send(%s) failed nomem?\n", partner->address)); goto nomem; } partner->push.creq->async.fn = wreplsrv_push_handler_creq; partner->push.creq->async.private_data = partner; return; nomem: talloc_free(partner->push.notify_io); partner->push.notify_io = NULL; DEBUG(1,("wreplsrv_out_partner_push(%s,%u) failed nomem? (ignoring)\n", partner->address, propagate)); return; } static uint32_t wreplsrv_calc_change_count(struct wreplsrv_partner *partner, uint64_t maxVersionID) { uint64_t tmp_diff = UINT32_MAX; /* catch an overflow */ if (partner->push.maxVersionID > maxVersionID) { goto done; } tmp_diff = maxVersionID - partner->push.maxVersionID; if (tmp_diff > UINT32_MAX) { tmp_diff = UINT32_MAX; goto done; } done: partner->push.maxVersionID = maxVersionID; return (uint32_t)(tmp_diff & UINT32_MAX); } NTSTATUS wreplsrv_out_push_run(struct wreplsrv_service *service) { struct wreplsrv_partner *partner; uint64_t seqnumber; uint32_t change_count; seqnumber = winsdb_get_maxVersion(service->wins_db); for (partner = service->partners; partner; partner = partner->next) { /* if it's not a push partner, go to the next partner */ if (!(partner->type & WINSREPL_PARTNER_PUSH)) continue; /* if push notifies are disabled for this partner, go to the next partner */ if (partner->push.change_count == 0) continue; /* get the actual change count for the partner */ change_count = wreplsrv_calc_change_count(partner, seqnumber); /* if the configured change count isn't reached, go to the next partner */ if (change_count < partner->push.change_count) continue; wreplsrv_out_partner_push(partner, false); } return NT_STATUS_OK; }