blob: 4fdbd4468b47dfe944be60db283ed2f5c8949dc6 [file] [log] [blame]
/**
* @author: Jeff Thompson
* Derived from Interest.js by Meki Cheraoui.
* See COPYING for copyright and distribution information.
*/
#include "binary-xml-encoder.h"
#include "binary-xml-decoder.h"
#include "binary-xml-name.h"
#include "binary-xml-publisher-public-key-digest.h"
#include "binary-xml-interest.h"
static ndn_Error encodeExclude(struct ndn_Exclude *exclude, struct ndn_BinaryXmlEncoder *encoder)
{
if (exclude->nEntries == 0)
return NDN_ERROR_success;
ndn_Error error;
if ((error = ndn_BinaryXmlEncoder_writeElementStartDTag(encoder, ndn_BinaryXml_DTag_Exclude)))
return error;
// TODO: Do we want to order the components (except for ANY)?
unsigned int i;
for (i = 0; i < exclude->nEntries; ++i) {
struct ndn_ExcludeEntry *entry = &exclude->entries[i];
if (entry->type == ndn_Exclude_COMPONENT) {
if ((error = ndn_BinaryXmlEncoder_writeBlobDTagElement
(encoder, ndn_BinaryXml_DTag_Component, entry->component.value, entry->component.valueLength)))
return error;
}
else if (entry->type == ndn_Exclude_ANY) {
if ((error = ndn_BinaryXmlEncoder_writeElementStartDTag(encoder, ndn_BinaryXml_DTag_Any)))
return error;
if ((error = ndn_BinaryXmlEncoder_writeElementClose(encoder)))
return error;
}
else
return NDN_ERROR_unrecognized_ndn_ExcludeType;
}
if ((error = ndn_BinaryXmlEncoder_writeElementClose(encoder)))
return error;
return NDN_ERROR_success;
}
static ndn_Error decodeExclude(struct ndn_Exclude *exclude, struct ndn_BinaryXmlDecoder *decoder)
{
ndn_Error error;
if ((error = ndn_BinaryXmlDecoder_readElementStartDTag(decoder, ndn_BinaryXml_DTag_Exclude)))
return error;
exclude->nEntries = 0;
while (1) {
int gotExpectedTag;
if ((error = ndn_BinaryXmlDecoder_peekDTag(decoder, ndn_BinaryXml_DTag_Component, &gotExpectedTag)))
return error;
if (gotExpectedTag) {
// Component
unsigned char *component;
unsigned int componentLen;
if ((error = ndn_BinaryXmlDecoder_readBinaryDTagElement(decoder, ndn_BinaryXml_DTag_Component, 0, &component, &componentLen)))
return error;
// Add the component entry.
if (exclude->nEntries >= exclude->maxEntries)
return NDN_ERROR_read_an_entry_past_the_maximum_number_of_entries_allowed_in_the_exclude;
ndn_ExcludeEntry_initialize(exclude->entries + exclude->nEntries, ndn_Exclude_COMPONENT, component, componentLen);
++exclude->nEntries;
continue;
}
if ((error = ndn_BinaryXmlDecoder_peekDTag(decoder, ndn_BinaryXml_DTag_Any, &gotExpectedTag)))
return error;
if (gotExpectedTag) {
// Any
if ((error = ndn_BinaryXmlDecoder_readElementStartDTag(decoder, ndn_BinaryXml_DTag_Any)))
return error;
if ((error = ndn_BinaryXmlDecoder_readElementClose(decoder)))
return error;
// Add the any entry.
if (exclude->nEntries >= exclude->maxEntries)
return NDN_ERROR_read_an_entry_past_the_maximum_number_of_entries_allowed_in_the_exclude;
ndn_ExcludeEntry_initialize(exclude->entries + exclude->nEntries, ndn_Exclude_ANY, 0, 0);
++exclude->nEntries;
continue;
}
if ((error = ndn_BinaryXmlDecoder_peekDTag(decoder, ndn_BinaryXml_DTag_Bloom, &gotExpectedTag)))
return error;
if (gotExpectedTag) {
// Skip the Bloom and treat it as Any.
unsigned char *value;
unsigned int valueLen;
if ((error = ndn_BinaryXmlDecoder_readBinaryDTagElement(decoder, ndn_BinaryXml_DTag_Bloom, 0, &value, &valueLen)))
return error;
// Add the any entry.
if (exclude->nEntries >= exclude->maxEntries)
return NDN_ERROR_read_an_entry_past_the_maximum_number_of_entries_allowed_in_the_exclude;
ndn_ExcludeEntry_initialize(exclude->entries + exclude->nEntries, ndn_Exclude_ANY, 0, 0);
++exclude->nEntries;
continue;
}
// Else no more entries.
break;
}
if ((error = ndn_BinaryXmlDecoder_readElementClose(decoder)))
return error;
return NDN_ERROR_success;
}
ndn_Error ndn_encodeBinaryXmlInterest(struct ndn_Interest *interest, struct ndn_BinaryXmlEncoder *encoder)
{
ndn_Error error;
if ((error = ndn_BinaryXmlEncoder_writeElementStartDTag(encoder, ndn_BinaryXml_DTag_Interest)))
return error;
if ((error = ndn_encodeBinaryXmlName(&interest->name, encoder)))
return error;
if ((error = ndn_BinaryXmlEncoder_writeOptionalUnsignedDecimalIntDTagElement
(encoder, ndn_BinaryXml_DTag_MinSuffixComponents, interest->minSuffixComponents)))
return error;
if ((error = ndn_BinaryXmlEncoder_writeOptionalUnsignedDecimalIntDTagElement
(encoder, ndn_BinaryXml_DTag_MaxSuffixComponents, interest->maxSuffixComponents)))
return error;
// This will skip encoding if there is no publisherPublicKeyDigest.
if ((error = ndn_encodeBinaryXmlPublisherPublicKeyDigest(&interest->publisherPublicKeyDigest, encoder)))
return error;
// This will skip encoding if there is no exclude.
if ((error = encodeExclude(&interest->exclude, encoder)))
return error;
if ((error = ndn_BinaryXmlEncoder_writeOptionalUnsignedDecimalIntDTagElement
(encoder, ndn_BinaryXml_DTag_ChildSelector, interest->childSelector)))
return error;
if (interest->answerOriginKind >= 0 && interest->answerOriginKind != ndn_Interest_DEFAULT_ANSWER_ORIGIN_KIND) {
if ((error = ndn_BinaryXmlEncoder_writeUnsignedDecimalIntDTagElement
(encoder, ndn_BinaryXml_DTag_AnswerOriginKind, (unsigned int)interest->answerOriginKind)))
return error;
}
if ((error = ndn_BinaryXmlEncoder_writeOptionalUnsignedDecimalIntDTagElement
(encoder, ndn_BinaryXml_DTag_Scope, interest->scope)))
return error;
if ((error = ndn_BinaryXmlEncoder_writeOptionalTimeMillisecondsDTagElement
(encoder, ndn_BinaryXml_DTag_InterestLifetime, interest->interestLifetimeMilliseconds)))
return error;
if ((error = ndn_BinaryXmlEncoder_writeOptionalBlobDTagElement
(encoder, ndn_BinaryXml_DTag_Nonce, interest->nonce, interest->nonceLength)))
return error;
if ((error = ndn_BinaryXmlEncoder_writeElementClose(encoder)))
return error;
return NDN_ERROR_success;
}
ndn_Error ndn_decodeBinaryXmlInterest(struct ndn_Interest *interest, struct ndn_BinaryXmlDecoder *decoder)
{
ndn_Error error;
if ((error = ndn_BinaryXmlDecoder_readElementStartDTag(decoder, ndn_BinaryXml_DTag_Interest)))
return error;
if ((error = ndn_decodeBinaryXmlName(&interest->name, decoder)))
return error;
if ((error = ndn_BinaryXmlDecoder_readOptionalUnsignedIntegerDTagElement
(decoder, ndn_BinaryXml_DTag_MinSuffixComponents, &interest->minSuffixComponents)))
return error;
if ((error = ndn_BinaryXmlDecoder_readOptionalUnsignedIntegerDTagElement
(decoder, ndn_BinaryXml_DTag_MaxSuffixComponents, &interest->maxSuffixComponents)))
return error;
if ((error = ndn_decodeOptionalBinaryXmlPublisherPublicKeyDigest(&interest->publisherPublicKeyDigest, decoder)))
return error;
int gotExpectedTag;
if ((error = ndn_BinaryXmlDecoder_peekDTag(decoder, ndn_BinaryXml_DTag_Exclude, &gotExpectedTag)))
return error;
if (gotExpectedTag) {
if ((error = decodeExclude(&interest->exclude, decoder)))
return error;
}
else
interest->exclude.nEntries = 0;
if ((error = ndn_BinaryXmlDecoder_readOptionalUnsignedIntegerDTagElement
(decoder, ndn_BinaryXml_DTag_ChildSelector, &interest->childSelector)))
return error;
if ((error = ndn_BinaryXmlDecoder_readOptionalUnsignedIntegerDTagElement
(decoder, ndn_BinaryXml_DTag_AnswerOriginKind, &interest->answerOriginKind)))
return error;
if ((error = ndn_BinaryXmlDecoder_readOptionalUnsignedIntegerDTagElement
(decoder, ndn_BinaryXml_DTag_Scope, &interest->scope)))
return error;
if (error= ndn_BinaryXmlDecoder_readOptionalTimeMillisecondsDTagElement
(decoder, ndn_BinaryXml_DTag_InterestLifetime, &interest->interestLifetimeMilliseconds))
return error;
if ((error = ndn_BinaryXmlDecoder_readOptionalBinaryDTagElement
(decoder, ndn_BinaryXml_DTag_Nonce, 0, &interest->nonce, &interest->nonceLength)))
return error;
if ((error = ndn_BinaryXmlDecoder_readElementClose(decoder)))
return error;
return NDN_ERROR_success;
}