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542 lines
21 KiB
C
542 lines
21 KiB
C
/**
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* str2wire.h - read txt presentation of RRs
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*
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* (c) NLnet Labs, 2005-2006
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*
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* See the file LICENSE for the license
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*/
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/**
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* \file
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*
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* Parses text to wireformat.
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*/
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#ifndef LDNS_STR2WIRE_H
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#define LDNS_STR2WIRE_H
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/* include rrdef for MAX_DOMAINLEN constant */
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#include <ldns/rrdef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct sldns_struct_lookup_table;
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/** buffer to read an RR, cannot be larger than 64K because of packet size */
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#define LDNS_RR_BUF_SIZE 65535 /* bytes */
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#define LDNS_DEFAULT_TTL 3600
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/*
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* To convert class and type to string see
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* sldns_get_rr_class_by_name(str)
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* sldns_get_rr_type_by_name(str)
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* from rrdef.h
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*/
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/**
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* Convert text string into dname wireformat, mallocless, with user buffer.
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* @param str: the text string with the domain name.
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* @param buf: the result buffer, suggested size LDNS_MAX_DOMAINLEN+1
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* @param len: length of the buffer on input, length of the result on output.
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* @return 0 on success, otherwise an error.
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*/
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int sldns_str2wire_dname_buf(const char* str, uint8_t* buf, size_t* len);
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/**
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* Same as sldns_str2wire_dname_buf, but concatenates origin if the domain
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* name is relative (does not end in '.').
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* @param str: the text string with the domain name.
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* @param buf: the result buffer, suggested size LDNS_MAX_DOMAINLEN+1
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* @param len: length of the buffer on input, length of the result on output.
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* @param origin: the origin to append or NULL (nothing is appended).
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* @param origin_len: length of origin.
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* @return 0 on success, otherwise an error.
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*/
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int sldns_str2wire_dname_buf_origin(const char* str, uint8_t* buf, size_t* len,
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uint8_t* origin, size_t origin_len);
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/**
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* Convert text string into dname wireformat
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* @param str: the text string with the domain name.
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* @param len: returned length of wireformat.
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* @return wireformat dname (malloced) or NULL on failure.
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*/
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uint8_t* sldns_str2wire_dname(const char* str, size_t* len);
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/**
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* Convert text RR to wireformat, with user buffer.
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* @param str: the RR data in text presentation format.
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* @param rr: the buffer where the result is stored into. This buffer has
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* the wire-dname(uncompressed), type, class, ttl, rdatalen, rdata.
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* These values are probably not aligned, and in network format.
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* Use the sldns_wirerr_get_xxx functions to access them safely.
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* buffer size LDNS_RR_BUF_SIZE is suggested.
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* @param len: on input the length of the buffer, on output the amount of
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* the buffer used for the rr.
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* @param dname_len: if non-NULL, filled with the dname length as result.
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* Because after the dname you find the type, class, ttl, rdatalen, rdata.
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* @param default_ttl: TTL used if no TTL available.
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* @param origin: used for origin dname (if not NULL)
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* @param origin_len: length of origin.
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* @param prev: used for prev_rr dname (if not NULL)
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* @param prev_len: length of prev.
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* @return 0 on success, an error on failure.
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*/
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int sldns_str2wire_rr_buf(const char* str, uint8_t* rr, size_t* len,
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size_t* dname_len, uint32_t default_ttl, uint8_t* origin,
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size_t origin_len, uint8_t* prev, size_t prev_len);
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/**
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* Same as sldns_str2wire_rr_buf, but there is no rdata, it returns an RR
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* with zero rdata and no ttl. It has name, type, class.
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* You can access those with the sldns_wirerr_get_type and class functions.
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* @param str: the RR data in text presentation format.
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* @param rr: the buffer where the result is stored into.
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* @param len: on input the length of the buffer, on output the amount of
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* the buffer used for the rr.
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* @param dname_len: if non-NULL, filled with the dname length as result.
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* Because after the dname you find the type, class, ttl, rdatalen, rdata.
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* @param origin: used for origin dname (if not NULL)
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* @param origin_len: length of origin.
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* @param prev: used for prev_rr dname (if not NULL)
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* @param prev_len: length of prev.
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* @return 0 on success, an error on failure.
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*/
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int sldns_str2wire_rr_question_buf(const char* str, uint8_t* rr, size_t* len,
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size_t* dname_len, uint8_t* origin, size_t origin_len, uint8_t* prev,
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size_t prev_len);
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/**
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* Get the type of the RR.
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* @param rr: the RR in wire format.
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* @param len: rr length.
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* @param dname_len: dname length to skip.
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* @return type in host byteorder
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*/
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uint16_t sldns_wirerr_get_type(uint8_t* rr, size_t len, size_t dname_len);
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/**
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* Get the class of the RR.
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* @param rr: the RR in wire format.
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* @param len: rr length.
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* @param dname_len: dname length to skip.
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* @return class in host byteorder
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*/
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uint16_t sldns_wirerr_get_class(uint8_t* rr, size_t len, size_t dname_len);
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/**
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* Get the ttl of the RR.
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* @param rr: the RR in wire format.
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* @param len: rr length.
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* @param dname_len: dname length to skip.
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* @return ttl in host byteorder
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*/
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uint32_t sldns_wirerr_get_ttl(uint8_t* rr, size_t len, size_t dname_len);
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/**
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* Get the rdata length of the RR.
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* @param rr: the RR in wire format.
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* @param len: rr length.
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* @param dname_len: dname length to skip.
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* @return rdata length in host byteorder
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* If the rdata length is larger than the rr-len allows, it is truncated.
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* So, that it is safe to read the data length returned
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* from this function from the rdata pointer of sldns_wirerr_get_rdata.
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*/
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uint16_t sldns_wirerr_get_rdatalen(uint8_t* rr, size_t len, size_t dname_len);
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/**
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* Get the rdata pointer of the RR.
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* @param rr: the RR in wire format.
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* @param len: rr length.
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* @param dname_len: dname length to skip.
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* @return rdata pointer
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*/
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uint8_t* sldns_wirerr_get_rdata(uint8_t* rr, size_t len, size_t dname_len);
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/**
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* Get the rdata pointer of the RR. prefixed with rdata length.
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* @param rr: the RR in wire format.
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* @param len: rr length.
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* @param dname_len: dname length to skip.
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* @return pointer to rdatalength, followed by the rdata.
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*/
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uint8_t* sldns_wirerr_get_rdatawl(uint8_t* rr, size_t len, size_t dname_len);
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/**
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* Parse result codes
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*/
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#define LDNS_WIREPARSE_MASK 0x0fff
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#define LDNS_WIREPARSE_SHIFT 12
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#define LDNS_WIREPARSE_ERROR(e) ((e)&LDNS_WIREPARSE_MASK)
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#define LDNS_WIREPARSE_OFFSET(e) (((e)&~LDNS_WIREPARSE_MASK)>>LDNS_WIREPARSE_SHIFT)
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/* use lookuptable to get error string, sldns_wireparse_errors */
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#define LDNS_WIREPARSE_ERR_OK 0
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#define LDNS_WIREPARSE_ERR_GENERAL 342
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#define LDNS_WIREPARSE_ERR_DOMAINNAME_OVERFLOW 343
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#define LDNS_WIREPARSE_ERR_DOMAINNAME_UNDERFLOW 344
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#define LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL 345
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#define LDNS_WIREPARSE_ERR_LABEL_OVERFLOW 346
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#define LDNS_WIREPARSE_ERR_EMPTY_LABEL 347
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#define LDNS_WIREPARSE_ERR_SYNTAX_BAD_ESCAPE 348
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#define LDNS_WIREPARSE_ERR_SYNTAX 349
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#define LDNS_WIREPARSE_ERR_SYNTAX_TTL 350
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#define LDNS_WIREPARSE_ERR_SYNTAX_TYPE 351
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#define LDNS_WIREPARSE_ERR_SYNTAX_CLASS 352
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#define LDNS_WIREPARSE_ERR_SYNTAX_RDATA 353
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#define LDNS_WIREPARSE_ERR_SYNTAX_MISSING_VALUE 354
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#define LDNS_WIREPARSE_ERR_INVALID_STR 355
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#define LDNS_WIREPARSE_ERR_SYNTAX_B64 356
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#define LDNS_WIREPARSE_ERR_SYNTAX_B32_EXT 357
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#define LDNS_WIREPARSE_ERR_SYNTAX_HEX 358
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#define LDNS_WIREPARSE_ERR_CERT_BAD_ALGORITHM 359
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#define LDNS_WIREPARSE_ERR_SYNTAX_TIME 360
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#define LDNS_WIREPARSE_ERR_SYNTAX_PERIOD 361
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#define LDNS_WIREPARSE_ERR_SYNTAX_ILNP64 362
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#define LDNS_WIREPARSE_ERR_SYNTAX_EUI48 363
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#define LDNS_WIREPARSE_ERR_SYNTAX_EUI64 364
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#define LDNS_WIREPARSE_ERR_SYNTAX_TAG 365
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#define LDNS_WIREPARSE_ERR_NOT_IMPL 366
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#define LDNS_WIREPARSE_ERR_SYNTAX_INT 367
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#define LDNS_WIREPARSE_ERR_SYNTAX_IP4 368
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#define LDNS_WIREPARSE_ERR_SYNTAX_IP6 369
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#define LDNS_WIREPARSE_ERR_SYNTAX_INTEGER_OVERFLOW 370
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#define LDNS_WIREPARSE_ERR_INCLUDE 371
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#define LDNS_WIREPARSE_ERR_PARENTHESIS 372
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/**
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* Get reference to a constant string for the (parse) error.
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* @param e: error return value
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* @return string.
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*/
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const char* sldns_get_errorstr_parse(int e);
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/**
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* wire parse state for parsing files
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*/
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struct sldns_file_parse_state {
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/** the origin domain name, if len!=0. uncompressed wireformat */
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uint8_t origin[LDNS_MAX_DOMAINLEN+1];
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/** length of origin domain name, in bytes. 0 if not set. */
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size_t origin_len;
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/** the previous domain name, if len!=0. uncompressed wireformat*/
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uint8_t prev_rr[LDNS_MAX_DOMAINLEN+1];
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/** length of the previous domain name, in bytes. 0 if not set. */
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size_t prev_rr_len;
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/** default TTL, this is used if the text does not specify a TTL,
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* host byteorder */
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uint32_t default_ttl;
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/** line number information */
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int lineno;
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};
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/**
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* Read one RR from zonefile with buffer for the data.
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* @param in: file that is read from (one RR, multiple lines if it spans them).
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* @param rr: this is malloced by the user and the result is stored here,
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* if an RR is read. If no RR is read this is signalled with the
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* return len set to 0 (for ORIGIN, TTL directives).
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* @param len: on input, the length of the rr buffer. on output the rr len.
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* Buffer size of 64k should be enough.
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* @param dname_len: returns the length of the dname initial part of the rr.
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* @param parse_state: pass a pointer to user-allocated struct.
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* Contents are maintained by this function.
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* If you pass NULL then ORIGIN and TTL directives are not honored.
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* You can start out with a particular origin by pre-filling it.
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* otherwise, zero the structure before passing it.
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* lineno is incremented when a newline is passed by the parser,
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* you should initialize it at 1 at the start of the file.
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* @return 0 on success, error on failure.
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*/
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int sldns_fp2wire_rr_buf(FILE* in, uint8_t* rr, size_t* len, size_t* dname_len,
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struct sldns_file_parse_state* parse_state);
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/**
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* Convert one rdf in rdata to wireformat and parse from string.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @param rdftype: the type of the rdf.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_rdf_buf(const char* str, uint8_t* rd, size_t* len,
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sldns_rdf_type rdftype);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_INT8 from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_int8_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_INT16 from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_int16_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_INT32 from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_int32_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_A from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_a_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_AAAA from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_aaaa_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_STR from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_str_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_APL from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_apl_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_B64 from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_b64_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_B32_EXT from string to wireformat.
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* And also LDNS_RDF_TYPE_NSEC3_NEXT_OWNER.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_b32_ext_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_HEX from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_hex_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_NSEC from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_nsec_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_TYPE from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_type_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_CLASS from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_class_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_CERT_ALG from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_cert_alg_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_ALG from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_alg_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_TIME from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_time_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_PERIOD from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_period_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_LOC from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_loc_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_WKS from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_wks_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_NSAP from string to wireformat.
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* @param str: the text to convert for this rdata element.
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* @param rd: rdata buffer for the wireformat.
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* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
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*/
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int sldns_str2wire_nsap_buf(const char* str, uint8_t* rd, size_t* len);
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/**
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* Convert rdf of type LDNS_RDF_TYPE_ATMA from string to wireformat.
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|
* @param str: the text to convert for this rdata element.
|
|
* @param rd: rdata buffer for the wireformat.
|
|
* @param len: length of rd buffer on input, used length on output.
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* @return 0 on success, error on failure.
|
|
*/
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|
int sldns_str2wire_atma_buf(const char* str, uint8_t* rd, size_t* len);
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|
|
|
/**
|
|
* Convert rdf of type LDNS_RDF_TYPE_IPSECKEY from string to wireformat.
|
|
* @param str: the text to convert for this rdata element.
|
|
* @param rd: rdata buffer for the wireformat.
|
|
* @param len: length of rd buffer on input, used length on output.
|
|
* @return 0 on success, error on failure.
|
|
*/
|
|
int sldns_str2wire_ipseckey_buf(const char* str, uint8_t* rd, size_t* len);
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|
|
|
/**
|
|
* Convert rdf of type LDNS_RDF_TYPE_NSEC3_SALT from string to wireformat.
|
|
* @param str: the text to convert for this rdata element.
|
|
* @param rd: rdata buffer for the wireformat.
|
|
* @param len: length of rd buffer on input, used length on output.
|
|
* @return 0 on success, error on failure.
|
|
*/
|
|
int sldns_str2wire_nsec3_salt_buf(const char* str, uint8_t* rd, size_t* len);
|
|
|
|
/**
|
|
* Convert rdf of type LDNS_RDF_TYPE_ILNP64 from string to wireformat.
|
|
* @param str: the text to convert for this rdata element.
|
|
* @param rd: rdata buffer for the wireformat.
|
|
* @param len: length of rd buffer on input, used length on output.
|
|
* @return 0 on success, error on failure.
|
|
*/
|
|
int sldns_str2wire_ilnp64_buf(const char* str, uint8_t* rd, size_t* len);
|
|
|
|
/**
|
|
* Convert rdf of type LDNS_RDF_TYPE_EUI48 from string to wireformat.
|
|
* @param str: the text to convert for this rdata element.
|
|
* @param rd: rdata buffer for the wireformat.
|
|
* @param len: length of rd buffer on input, used length on output.
|
|
* @return 0 on success, error on failure.
|
|
*/
|
|
int sldns_str2wire_eui48_buf(const char* str, uint8_t* rd, size_t* len);
|
|
|
|
/**
|
|
* Convert rdf of type LDNS_RDF_TYPE_EUI64 from string to wireformat.
|
|
* @param str: the text to convert for this rdata element.
|
|
* @param rd: rdata buffer for the wireformat.
|
|
* @param len: length of rd buffer on input, used length on output.
|
|
* @return 0 on success, error on failure.
|
|
*/
|
|
int sldns_str2wire_eui64_buf(const char* str, uint8_t* rd, size_t* len);
|
|
|
|
/**
|
|
* Convert rdf of type LDNS_RDF_TYPE_TAG from string to wireformat.
|
|
* @param str: the text to convert for this rdata element.
|
|
* @param rd: rdata buffer for the wireformat.
|
|
* @param len: length of rd buffer on input, used length on output.
|
|
* @return 0 on success, error on failure.
|
|
*/
|
|
int sldns_str2wire_tag_buf(const char* str, uint8_t* rd, size_t* len);
|
|
|
|
/**
|
|
* Convert rdf of type LDNS_RDF_TYPE_LONG_STR from string to wireformat.
|
|
* @param str: the text to convert for this rdata element.
|
|
* @param rd: rdata buffer for the wireformat.
|
|
* @param len: length of rd buffer on input, used length on output.
|
|
* @return 0 on success, error on failure.
|
|
*/
|
|
int sldns_str2wire_long_str_buf(const char* str, uint8_t* rd, size_t* len);
|
|
|
|
/**
|
|
* Convert rdf of type LDNS_RDF_TYPE_HIP from string to wireformat.
|
|
* @param str: the text to convert for this rdata element.
|
|
* @param rd: rdata buffer for the wireformat.
|
|
* @param len: length of rd buffer on input, used length on output.
|
|
* @return 0 on success, error on failure.
|
|
*/
|
|
int sldns_str2wire_hip_buf(const char* str, uint8_t* rd, size_t* len);
|
|
|
|
/**
|
|
* Convert rdf of type LDNS_RDF_TYPE_INT16_DATA from string to wireformat.
|
|
* @param str: the text to convert for this rdata element.
|
|
* @param rd: rdata buffer for the wireformat.
|
|
* @param len: length of rd buffer on input, used length on output.
|
|
* @return 0 on success, error on failure.
|
|
*/
|
|
int sldns_str2wire_int16_data_buf(const char* str, uint8_t* rd, size_t* len);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* LDNS_STR2WIRE_H */
|