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92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
/*
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* dnstap/dnstap_fstrm.c - Frame Streams protocol for dnstap
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*
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* Copyright (c) 2020, NLnet Labs. All rights reserved.
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*
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* This software is open source.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the NLNET LABS nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/**
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* \file
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*
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* Definitions for the Frame Streams data transport protocol for
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* dnstap message logs.
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*/
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#include "config.h"
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#include "dnstap/dnstap_fstrm.h"
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void* fstrm_create_control_frame_start(char* contenttype, size_t* len)
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{
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uint32_t* control;
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size_t n;
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/* start framestream message:
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* 4byte 0: control indicator.
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* 4byte bigendian: length of control frame
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* 4byte bigendian: type START
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* 4byte bigendian: frame option: content-type
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* 4byte bigendian: length of string
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* string of content type (dnstap)
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*/
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n = 4+4+4+4+4+strlen(contenttype);
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control = malloc(n);
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if(!control)
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return NULL;
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control[0] = 0;
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control[1] = htonl(4+4+4+strlen(contenttype));
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control[2] = htonl(FSTRM_CONTROL_FRAME_START);
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control[3] = htonl(FSTRM_CONTROL_FIELD_TYPE_CONTENT_TYPE);
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control[4] = htonl(strlen(contenttype));
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memmove(&control[5], contenttype, strlen(contenttype));
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*len = n;
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return control;
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}
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void* fstrm_create_control_frame_stop(size_t* len)
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{
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uint32_t* control;
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size_t n;
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/* stop framestream message:
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* 4byte 0: control indicator.
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* 4byte bigendian: length of control frame
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* 4byte bigendian: type STOP
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*/
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n = 4+4+4;
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control = malloc(n);
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if(!control)
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return NULL;
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control[0] = 0;
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control[1] = htonl(4);
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control[2] = htonl(FSTRM_CONTROL_FRAME_STOP);
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*len = n;
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return control;
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}
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