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Diffstat (limited to '')
| -rw-r--r-- | contrib/librdns/compression.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/contrib/librdns/compression.h b/contrib/librdns/compression.h new file mode 100644 index 0000000..6056117 --- /dev/null +++ b/contrib/librdns/compression.h @@ -0,0 +1,48 @@ +/* Copyright (c) 2014, Vsevolod Stakhov + * 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. + * + * THIS SOFTWARE IS PROVIDED ''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 AUTHOR 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 COMPRESSION_H_ +#define COMPRESSION_H_ + +#include "dns_private.h" +#include "khash.h" + +struct rdns_compression_name { + const char *suffix; /**< suffix packed */ + unsigned int suffix_len; /**< length of the suffix */ + unsigned int offset; /**< offset in the packet */ +}; + + +KHASH_DECLARE(rdns_compression_hash, struct rdns_compression_name, char); + +/** + * Try to compress name passed or write it 'as is' + * @return + */ +bool rdns_write_name_compressed (struct rdns_request *req, + const char *name, unsigned int namelen, + khash_t(rdns_compression_hash) **comp); + +void rdns_compression_free (khash_t(rdns_compression_hash) *comp); + +#endif /* COMPRESSION_H_ */ |