+/* ***************** low-level parsing API ******************** */
+
+/**
+ * Parse a DNS record entry.
+ *
+ * @param udp_payload entire UDP payload
+ * @param udp_payload_length length of @a udp_payload
+ * @param off pointer to the offset of the record to parse in the udp_payload (to be
+ * incremented by the size of the record)
+ * @param r where to write the record information
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR if the record is malformed
+ */
+int
+GNUNET_DNSPARSER_parse_record (const char *udp_payload,
+ size_t udp_payload_length,
+ size_t *off,
+ struct GNUNET_DNSPARSER_Record *r);
+
+
+/**
+ * Parse name inside of a DNS query or record.
+ *
+ * @param udp_payload entire UDP payload
+ * @param udp_payload_length length of @a udp_payload
+ * @param off pointer to the offset of the name to parse in the udp_payload (to be
+ * incremented by the size of the name)
+ * @return name as 0-terminated C string on success, NULL if the payload is malformed
+ */
+char *
+GNUNET_DNSPARSER_parse_name (const char *udp_payload,
+ size_t udp_payload_length,
+ size_t *off);
+
+
+/**
+ * Parse a DNS query entry.
+ *
+ * @param udp_payload entire UDP payload
+ * @param udp_payload_length length of @a udp_payload
+ * @param off pointer to the offset of the query to parse in the udp_payload (to be
+ * incremented by the size of the query)
+ * @param q where to write the query information
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR if the query is malformed
+ */
+int
+GNUNET_DNSPARSER_parse_query (const char *udp_payload,
+ size_t udp_payload_length,
+ size_t *off,
+ struct GNUNET_DNSPARSER_Query *q);
+
+
+/**
+ * Parse a DNS SOA record.
+ *
+ * @param udp_payload reference to UDP packet
+ * @param udp_payload_length length of @a udp_payload
+ * @param off pointer to the offset of the query to parse in the SOA record (to be
+ * incremented by the size of the record), unchanged on error
+ * @return the parsed SOA record, NULL on error
+ */
+struct GNUNET_DNSPARSER_SoaRecord *
+GNUNET_DNSPARSER_parse_soa (const char *udp_payload,
+ size_t udp_payload_length,
+ size_t *off);
+
+
+/**
+ * Parse a DNS CERT record.
+ *
+ * @param udp_payload reference to UDP packet
+ * @param udp_payload_length length of @a udp_payload
+ * @param off pointer to the offset of the query to parse in the CERT record (to be
+ * incremented by the size of the record), unchanged on error
+ * @return the parsed CERT record, NULL on error
+ */
+struct GNUNET_DNSPARSER_CertRecord *
+GNUNET_DNSPARSER_parse_cert (const char *udp_payload,
+ size_t udp_payload_length,
+ size_t *off);
+
+
+/**
+ * Parse a DNS MX record.
+ *
+ * @param udp_payload reference to UDP packet
+ * @param udp_payload_length length of @a udp_payload
+ * @param off pointer to the offset of the query to parse in the MX record (to be
+ * incremented by the size of the record), unchanged on error
+ * @return the parsed MX record, NULL on error
+ */
+struct GNUNET_DNSPARSER_MxRecord *
+GNUNET_DNSPARSER_parse_mx (const char *udp_payload,
+ size_t udp_payload_length,
+ size_t *off);
+
+
+/**
+ * Parse a DNS SRV record.
+ *
+ * @param udp_payload reference to UDP packet
+ * @param udp_payload_length length of @a udp_payload
+ * @param off pointer to the offset of the query to parse in the SRV record (to be
+ * incremented by the size of the record), unchanged on error
+ * @return the parsed SRV record, NULL on error
+ */
+struct GNUNET_DNSPARSER_SrvRecord *
+GNUNET_DNSPARSER_parse_srv (const char *udp_payload,
+ size_t udp_payload_length,
+ size_t *off);
+
+/* ***************** low-level deallocation API ******************** */
+
+/**
+ * Free the given DNS record.
+ *
+ * @param r record to free
+ */
+void
+GNUNET_DNSPARSER_free_record (struct GNUNET_DNSPARSER_Record *r);
+
+
+/**
+ * Free MX information record.
+ *
+ * @param mx record to free
+ */
+void
+GNUNET_DNSPARSER_free_mx (struct GNUNET_DNSPARSER_MxRecord *mx);
+
+
+/**
+ * Free SRV information record.
+ *
+ * @param srv record to free
+ */
+void
+GNUNET_DNSPARSER_free_srv (struct GNUNET_DNSPARSER_SrvRecord *srv);
+
+
+/**
+ * Free SOA information record.
+ *
+ * @param soa record to free
+ */
+void
+GNUNET_DNSPARSER_free_soa (struct GNUNET_DNSPARSER_SoaRecord *soa);
+
+
+/**
+ * Free CERT information record.
+ *
+ * @param cert record to free
+ */
+void
+GNUNET_DNSPARSER_free_cert (struct GNUNET_DNSPARSER_CertRecord *cert);
+
+
+/**
+ * Convert a block of binary data to HEX.
+ *
+ * @param data binary data to convert
+ * @param data_size number of bytes in @a data
+ * @return HEX string (lower case)
+ */
+char *
+GNUNET_DNSPARSER_bin_to_hex (const void *data,
+ size_t data_size);
+
+
+/**
+ * Convert a HEX string to block of binary data.
+ *
+ * @param hex HEX string to convert (may contain mixed case)
+ * @param data where to write result, must be
+ * at least `strlen(hex)/2` bytes long
+ * @return number of bytes written to data
+ */
+size_t
+GNUNET_DNSPARSER_hex_to_bin (const char *hex,
+ void *data);
+