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Make wire format query packet function

This commit is contained in:
Willem Toorop 2014-09-09 17:19:52 +02:00
parent c40af0d316
commit 26578220af
2 changed files with 111 additions and 0 deletions
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/**
*
* /brief function for stub resolving
*
*/
/*
* Copyright (c) 2013, NLnet Labs, Verisign, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the names of the copyright holders nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Verisign, Inc. BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "getdns/getdns.h"
#include "config.h"
#include "gldns/gbuffer.h"
#include "gldns/rrdef.h"
#include "gldns/str2wire.h"
#include <ldns/util.h>
gldns_buffer *
make_query_pkt(const char *name, uint16_t request_type, struct getdns_dict *extensions)
{
uint16_t flags = 0; /* QUERY, NOERROR */
uint32_t klass;
size_t pos;
gldns_buffer *pkt = gldns_buffer_new(512); /* max query */
if (! pkt)
return NULL;
gldns_buffer_clear(pkt);
gldns_buffer_write_u16(pkt, ldns_get_random());
gldns_buffer_write_u16(pkt, flags);
gldns_buffer_write_u16(pkt, 1); /* query count */
gldns_buffer_write(pkt, "\000\000\000\000\000\000", 6); /* counts */
pos = gldns_buffer_remaining(pkt);
if (gldns_str2wire_dname_buf(name, gldns_buffer_current(pkt), &pos)) {
gldns_buffer_free(pkt);
return NULL;
}
gldns_buffer_skip(pkt, gldns_buffer_remaining(pkt) - pos);
gldns_buffer_write_u16(pkt, request_type);
if (getdns_dict_get_int(extensions, "specify_class", &klass)
!= GETDNS_RETURN_GOOD)
klass = GLDNS_RR_CLASS_IN;
gldns_buffer_write_u16(pkt, (uint16_t) klass);
return pkt;
}
/* stub.c */

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/**
*
* /brief functions for stub resolving
*
*/
/*
* Copyright (c) 2013, NLnet Labs, Verisign, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the names of the copyright holders nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Verisign, Inc. BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef STUB_H_
#define STUB_H_
#endif
/* stub.h */