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5f393deb30
Wrapper function to parse resolv.conf and talk to multiple nameservers. This is the code where we might want to add a "working nameserver" cache. glibc always looks at the first configured nameserver. If that's dead, glibc runs into a timeout and only then asks the second one that might succeed. When more than one dns query is to be performed, these timeouts add up. Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/*
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* Unix SMB/CIFS implementation.
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* Internal DNS query structures
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* Copyright (C) Volker Lendecke 2018
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __LIBCLI_DNS_DNS_LOOKUP_H__
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#define __LIBCLI_DNS_DNS_LOOKUP_H__
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#include "replace.h"
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#include "system/network.h"
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#include <tevent.h>
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#include "lib/util/data_blob.h"
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#include "lib/util/time.h"
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#include "librpc/gen_ndr/dns.h"
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struct tevent_req *dns_lookup_send(TALLOC_CTX *mem_ctx,
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struct tevent_context *ev,
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FILE *resolv_conf_fp,
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const char *name,
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enum dns_qclass qclass,
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enum dns_qtype qtype);
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int dns_lookup_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
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struct dns_name_packet **reply);
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int dns_lookup(FILE *resolv_conf_fp,
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const char *name,
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enum dns_qclass qclass,
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enum dns_qtype qtype,
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TALLOC_CTX *mem_ctx,
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struct dns_name_packet **reply);
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#endif
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