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/*
* Driver instance object.
*
* One instance is equivalent to dynamic-db section in named.conf.
* This module parses arguments and provide high-level operations
* instance init/zone load/instance destroy.
*
* Copyright (C) 2008-2015 Red Hat ; see COPYRIGHT for license
*/
#include <config.h>
#include <isc/task.h>
#include <isc/util.h>
#include <dns/db.h>
#include <dns/dyndb.h>
#include <dns/fixedname.h>
#include <dns/name.h>
#include <dns/view.h>
#include <dns/zone.h>
#include "db.h"
#include "util.h"
#include "instance.h"
#include "log.h"
#include "zone.h"
/*
* Parse parameters and convert them to zone names. Caller has to deallocate
* resulting DNS names.
*
* @param[in] argv NULL-terminated string array of length 2 (excluding NULL)
* Each string has to be a valid DNS name.
* @param[out] z1 Zone name from argv[0]
* @param[out] z2 Zone name from argv[1]
*/
static isc_result_t
parse_params(isc_mem_t *mctx, int argc, char **argv,
dns_name_t *z1, dns_name_t *z2)
{
isc_result_t result;
int i;
REQUIRE(argv != NULL);
REQUIRE(z1 != NULL);
REQUIRE(z2 != NULL);
for (i = 0; i < argc; i++) {
log_info("param: '%s'", argv[i]);
}
log_info("number of params: %d", i);
if (argc != 2) {
log_error("exactly two parameters "
"(absolute zone names) are required");
result = ISC_R_FAILURE;
goto cleanup;
}
CHECK(dns_name_fromstring2(z1, argv[0], dns_rootname, 0, mctx));
CHECK(dns_name_fromstring2(z2, argv[1], dns_rootname, 0, mctx));
result = ISC_R_SUCCESS;
cleanup:
return (result);
}
/*
* Initialize new driver instance. It will not create zones until
* load_sample_instance_zones() is called.
*/
isc_result_t
new_sample_instance(isc_mem_t *mctx, const char *db_name,
int argc, char **argv, const dns_dyndbctx_t *dctx,
sample_instance_t **sample_instp)
{
isc_result_t result;
sample_instance_t *inst = NULL;
REQUIRE(sample_instp != NULL && *sample_instp == NULL);
CHECKED_MEM_GET_PTR(mctx, inst);
ZERO_PTR(inst);
isc_mem_attach(mctx, &inst->mctx);
inst->db_name = isc_mem_strdup(mctx, db_name);
if (inst->db_name == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
inst->zone1_name = dns_fixedname_initname(&inst->zone1_fn);
inst->zone2_name = dns_fixedname_initname(&inst->zone2_fn);
CHECK(parse_params(mctx, argc, argv,
inst->zone1_name, inst->zone2_name));
dns_view_attach(dctx->view, &inst->view);
dns_zonemgr_attach(dctx->zmgr, &inst->zmgr);
isc_task_attach(dctx->task, &inst->task);
/* Register new DNS DB implementation. */
CHECK(dns_db_register(db_name, create_db, inst, mctx, &inst->db_imp));
*sample_instp = inst;
result = ISC_R_SUCCESS;
cleanup:
if (result != ISC_R_SUCCESS)
destroy_sample_instance(&inst);
return (result);
}
/*
* Create empty zones, add fake SOA, NS, and A records, load fake zones
* and add them to inst->view.
*/
isc_result_t
load_sample_instance_zones(sample_instance_t *inst) {
isc_result_t result;
CHECK(create_zone(inst, inst->zone1_name, &inst->zone1));
CHECK(activate_zone(inst, inst->zone1));
CHECK(create_zone(inst, inst->zone2_name, &inst->zone2));
CHECK(activate_zone(inst, inst->zone2));
cleanup:
return (result);
}
void
destroy_sample_instance(sample_instance_t **instp) {
sample_instance_t *inst;
REQUIRE(instp != NULL);
inst = *instp;
if (inst == NULL)
return;
if (inst->db_name != NULL)
isc_mem_free(inst->mctx, inst->db_name);
if (inst->zone1 != NULL)
dns_zone_detach(&inst->zone1);
if (inst->zone2 != NULL)
dns_zone_detach(&inst->zone2);
if (inst->db_imp != NULL)
dns_db_unregister(&inst->db_imp);
dns_view_detach(&inst->view);
dns_zonemgr_detach(&inst->zmgr);
isc_task_detach(&inst->task);
MEM_PUT_AND_DETACH(inst);
*instp = NULL;
}
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