/*
* ixfrcreate.h -- generating IXFR differences from zonefiles.
*
* Copyright (c) 2021, NLnet Labs. All rights reserved.
*
* See LICENSE for the license.
*
*/
/* the ixfr create data structure while the ixfr difference from zone files
* is created. */
struct ixfr_create {
/* the old serial and new serial */
uint32_t old_serial, new_serial;
/* the file with the spooled old zone data */
char* file_name;
/* zone name in uncompressed wireformat */
uint8_t* zone_name;
/* length of zone name */
size_t zone_name_len;
/* max size of ixfr in bytes */
size_t max_size;
/* we are in checkzone, errors should go to the console, not to the
* serverlog */
int errorcmdline;
};
/* create the IXFR from differences. The old zone is spooled to file
* and the new zone is in memory now.
* With append_mem it does not only write to file but sticks it into the
* memory lookup structure for IXFRs used by the server. */
int ixfr_create_perform(struct ixfr_create* ixfrcr, struct zone* zone,
int append_mem, struct nsd* nsd, const char* zfile,
uint32_t ixfr_number);
/* cancel ixfrcreation, that was started, but not performed yet.
* It removes the temporary file. */
void ixfr_create_cancel(struct ixfr_create* ixfrcr);
/* returns true if ixfr should be created by taking difference between
* zone file contents. Also checks if ixfr is enabled for the zone. */
int ixfr_create_from_difference(struct zone* zone, const char* zfile,
int* ixfr_create_already_done_flag);
/* readup existing file if it already exists */
void ixfr_readup_exist(struct zone* zone, struct nsd* nsd, const char* zfile);
/*
* Structure to keep track of spool domain name iterator.
* This reads from the spool file and steps over the domain name
* elements one by one. It keeps track of: is the first one read yet,
* are we at end nothing more, is the element processed yet that is
* current read into the buffer?
*/
struct spool_dname_iterator {
/* the domain name that has recently been read, but can be none
* if before first or after last. */
uint8_t dname[MAXDOMAINLEN+1];
/* length of the dname, if one is read, otherwise 0 */
size_t dname_len;
/* if we are before the first element, hence nothing is read yet */
int read_first;
/* if we are after the last element, nothing to read, end of file */
int eof;
/* is the element processed that is currently in dname? */
int is_processed;
/* the file to read from */
FILE* spool;
/* filename for error printout */
char* file_name;
};
