#include "includes.h"
#include "talloc.h"
#include "param/param.h"
+#include "lib/events/events.h"
#include "dsdb/samdb/samdb.h"
#include "dsdb/common/util.h"
+#include "auth/auth.h"
#include "auth/session.h"
+#include "auth/gensec/gensec.h"
+#include "librpc/gen_ndr/security.h"
+#include "auth/credentials/credentials.h"
+#include "system/kerberos.h"
+#include "auth/kerberos/kerberos.h"
#include "gen_ndr/ndr_dnsp.h"
-#include "dlz_bind9.h"
+#include "gen_ndr/server_id.h"
+#include "messaging/messaging.h"
+#include "dlz_minimal.h"
+
+
+struct b9_options {
+ const char *url;
+};
struct dlz_bind9_data {
+ struct b9_options options;
struct ldb_context *samdb;
struct tevent_context *ev_ctx;
struct loadparm_context *lp;
+ int *transaction_token;
+ uint32_t soa_serial;
+
+ /* Used for dynamic update */
+ struct smb_krb5_context *smb_krb5_ctx;
+ struct auth_session_info *session_info;
+ char *update_name;
/* helper functions from the dlz_dlopen driver */
void (*log)(int level, const char *fmt, ...);
dns_ttl_t ttl, const char *data);
isc_result_t (*putnamedrr)(dns_sdlzlookup_t *handle, const char *name,
const char *type, dns_ttl_t ttl, const char *data);
+ isc_result_t (*writeable_zone)(dns_view_t *view, const char *zone_name);
+};
+
+
+static const char *zone_prefixes[] = {
+ "CN=MicrosoftDNS,DC=DomainDnsZones",
+ "CN=MicrosoftDNS,DC=ForestDnsZones",
+ "CN=MicrosoftDNS,CN=System",
+ NULL
};
/*
return the version of the API
*/
-_PUBLIC_ int dlz_version(void)
+_PUBLIC_ int dlz_version(unsigned int *flags)
{
return DLZ_DLOPEN_VERSION;
}
if (strcmp(helper_name, "putnamedrr") == 0) {
state->putnamedrr = ptr;
}
+ if (strcmp(helper_name, "writeable_zone") == 0) {
+ state->writeable_zone = ptr;
+ }
}
/*
case DNS_TYPE_MX:
*type = "mx";
*data = talloc_asprintf(mem_ctx, "%u %s",
- rec->data.srv.wPriority,
- rec->data.srv.nameTarget);
+ rec->data.mx.wPriority,
+ rec->data.mx.nameTarget);
break;
case DNS_TYPE_HINFO:
*data = rec->data.ns;
break;
- case DNS_TYPE_SOA:
+ case DNS_TYPE_SOA: {
+ const char *mname;
*type = "soa";
+
+ /* we need to fake the authoritative nameserver to
+ * point at ourselves. This is how AD DNS servers
+ * force clients to send updates to the right local DC
+ */
+ mname = talloc_asprintf(mem_ctx, "%s.%s",
+ lpcfg_netbios_name(state->lp), lpcfg_dnsdomain(state->lp));
+ if (mname == NULL) {
+ return false;
+ }
+ mname = strlower_talloc(mem_ctx, mname);
+ if (mname == NULL) {
+ return false;
+ }
+
+ state->soa_serial = rec->data.soa.serial;
+
*data = talloc_asprintf(mem_ctx, "%s %s %u %u %u %u %u",
- rec->data.soa.mname,
+ mname,
rec->data.soa.rname,
rec->data.soa.serial,
rec->data.soa.refresh,
rec->data.soa.expire,
rec->data.soa.minimum);
break;
+ }
default:
state->log(ISC_LOG_ERROR, "samba b9_putrr: unhandled record type %u",
return true;
}
+static const struct {
+ enum dns_record_type dns_type;
+ const char *typestr;
+ bool single_valued;
+} dns_typemap[] = {
+ { DNS_TYPE_A, "A" , false},
+ { DNS_TYPE_AAAA, "AAAA" , false},
+ { DNS_TYPE_CNAME, "CNAME" , true},
+ { DNS_TYPE_TXT, "TXT" , false},
+ { DNS_TYPE_PTR, "PTR" , false},
+ { DNS_TYPE_SRV, "SRV" , false},
+ { DNS_TYPE_MX, "MX" , false},
+ { DNS_TYPE_HINFO, "HINFO" , false},
+ { DNS_TYPE_NS, "NS" , false},
+ { DNS_TYPE_SOA, "SOA" , true},
+};
+
+
+/*
+ see if a DNS type is single valued
+ */
+static bool b9_single_valued(enum dns_record_type dns_type)
+{
+ int i;
+ for (i=0; i<ARRAY_SIZE(dns_typemap); i++) {
+ if (dns_typemap[i].dns_type == dns_type) {
+ return dns_typemap[i].single_valued;
+ }
+ }
+ return false;
+}
+
+/*
+ see if a DNS type is single valued
+ */
+static bool b9_dns_type(const char *type, enum dns_record_type *dtype)
+{
+ int i;
+ for (i=0; i<ARRAY_SIZE(dns_typemap); i++) {
+ if (strcasecmp(dns_typemap[i].typestr, type) == 0) {
+ *dtype = dns_typemap[i].dns_type;
+ return true;
+ }
+ }
+ return false;
+}
+
+
+#define DNS_PARSE_STR(ret, str, sep, saveptr) do { \
+ (ret) = strtok_r(str, sep, &saveptr); \
+ if ((ret) == NULL) return false; \
+ } while (0)
+
+#define DNS_PARSE_UINT(ret, str, sep, saveptr) do { \
+ char *istr = strtok_r(str, sep, &saveptr); \
+ if ((istr) == NULL) return false; \
+ (ret) = strtoul(istr, NULL, 10); \
+ } while (0)
+
+/*
+ parse a record from bind9
+ */
+static bool b9_parse(struct dlz_bind9_data *state,
+ const char *rdatastr,
+ struct dnsp_DnssrvRpcRecord *rec)
+{
+ char *full_name, *dclass, *type;
+ char *str, *saveptr=NULL;
+ int i;
+
+ str = talloc_strdup(rec, rdatastr);
+ if (str == NULL) {
+ return false;
+ }
+
+ /* parse the SDLZ string form */
+ DNS_PARSE_STR(full_name, str, "\t", saveptr);
+ DNS_PARSE_UINT(rec->dwTtlSeconds, NULL, "\t", saveptr);
+ DNS_PARSE_STR(dclass, NULL, "\t", saveptr);
+ DNS_PARSE_STR(type, NULL, "\t", saveptr);
+
+ /* construct the record */
+ for (i=0; i<ARRAY_SIZE(dns_typemap); i++) {
+ if (strcasecmp(type, dns_typemap[i].typestr) == 0) {
+ rec->wType = dns_typemap[i].dns_type;
+ break;
+ }
+ }
+ if (i == ARRAY_SIZE(dns_typemap)) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: unsupported record type '%s' for '%s'",
+ type, full_name);
+ return false;
+ }
+
+ switch (rec->wType) {
+ case DNS_TYPE_A:
+ DNS_PARSE_STR(rec->data.ipv4, NULL, " ", saveptr);
+ break;
+
+ case DNS_TYPE_AAAA:
+ DNS_PARSE_STR(rec->data.ipv6, NULL, " ", saveptr);
+ break;
+
+ case DNS_TYPE_CNAME:
+ DNS_PARSE_STR(rec->data.cname, NULL, " ", saveptr);
+ break;
+
+ case DNS_TYPE_TXT:
+ DNS_PARSE_STR(rec->data.txt, NULL, "\t", saveptr);
+ break;
+
+ case DNS_TYPE_PTR:
+ DNS_PARSE_STR(rec->data.ptr, NULL, " ", saveptr);
+ break;
+
+ case DNS_TYPE_SRV:
+ DNS_PARSE_UINT(rec->data.srv.wPriority, NULL, " ", saveptr);
+ DNS_PARSE_UINT(rec->data.srv.wWeight, NULL, " ", saveptr);
+ DNS_PARSE_UINT(rec->data.srv.wPort, NULL, " ", saveptr);
+ DNS_PARSE_STR(rec->data.srv.nameTarget, NULL, " ", saveptr);
+ break;
+
+ case DNS_TYPE_MX:
+ DNS_PARSE_UINT(rec->data.mx.wPriority, NULL, " ", saveptr);
+ DNS_PARSE_STR(rec->data.mx.nameTarget, NULL, " ", saveptr);
+ break;
+
+ case DNS_TYPE_HINFO:
+ DNS_PARSE_STR(rec->data.hinfo.cpu, NULL, " ", saveptr);
+ DNS_PARSE_STR(rec->data.hinfo.os, NULL, " ", saveptr);
+ break;
+
+ case DNS_TYPE_NS:
+ DNS_PARSE_STR(rec->data.ns, NULL, " ", saveptr);
+ break;
+
+ case DNS_TYPE_SOA:
+ DNS_PARSE_STR(rec->data.soa.mname, NULL, " ", saveptr);
+ DNS_PARSE_STR(rec->data.soa.rname, NULL, " ", saveptr);
+ DNS_PARSE_UINT(rec->data.soa.serial, NULL, " ", saveptr);
+ DNS_PARSE_UINT(rec->data.soa.refresh, NULL, " ", saveptr);
+ DNS_PARSE_UINT(rec->data.soa.retry, NULL, " ", saveptr);
+ DNS_PARSE_UINT(rec->data.soa.expire, NULL, " ", saveptr);
+ DNS_PARSE_UINT(rec->data.soa.minimum, NULL, " ", saveptr);
+ break;
+
+ default:
+ state->log(ISC_LOG_ERROR, "samba b9_parse: unhandled record type %u",
+ rec->wType);
+ return false;
+ }
+
+ /* we should be at the end of the buffer now */
+ if (strtok_r(NULL, "\t ", &saveptr) != NULL) {
+ state->log(ISC_LOG_ERROR, "samba b9_parse: expected data at end of string for '%s'");
+ return false;
+ }
+
+ return true;
+}
+
/*
send a resource recond to bind9
*/
}
}
- /* FIXME: why does dlz insist on all TTL values being the same
- for the same name? */
- result = state->putrr(handle, type, /* rec->dwTtlSeconds */ 900, data);
+ result = state->putrr(handle, type, rec->dwTtlSeconds, data);
if (result != ISC_R_SUCCESS) {
state->log(ISC_LOG_ERROR, "Failed to put rr");
}
return ISC_R_NOMEMORY;
}
- /* FIXME: why does dlz insist on all TTL values being the same
- for the same name? */
- result = state->putnamedrr(handle, name, type, /* rec->dwTtlSeconds */ 900, data);
+ result = state->putnamedrr(handle, name, type, rec->dwTtlSeconds, data);
if (result != ISC_R_SUCCESS) {
state->log(ISC_LOG_ERROR, "Failed to put named rr '%s'", name);
}
return result;
}
+/*
+ parse options
+ */
+static isc_result_t parse_options(struct dlz_bind9_data *state,
+ unsigned int argc, char *argv[],
+ struct b9_options *options)
+{
+ if (argc == 2) {
+ options->url = talloc_strdup(state, argv[1]);
+ if (options->url == NULL) {
+ return ISC_R_NOMEMORY;
+ }
+ state->log(ISC_LOG_INFO, "samba_dlz: Using samdb URL %s", options->url);
+ }
+
+ return ISC_R_SUCCESS;
+}
+
/*
called to initialise the driver
*/
_PUBLIC_ isc_result_t dlz_create(const char *dlzname,
unsigned int argc, char *argv[],
- void *driverarg, void **dbdata, ...)
+ void **dbdata, ...)
{
struct dlz_bind9_data *state;
const char *helper_name;
va_list ap;
isc_result_t result;
- const char *url;
TALLOC_CTX *tmp_ctx;
- int ret;
struct ldb_dn *dn;
+ NTSTATUS nt_status;
state = talloc_zero(NULL, struct dlz_bind9_data);
if (state == NULL) {
}
va_end(ap);
- state->lp = loadparm_init_global(true);
- if (state->lp == NULL) {
+ /* Start logging */
+ setup_logging("samba_dlz", DEBUG_DEFAULT_STDERR);
+
+ state->ev_ctx = s4_event_context_init(state);
+ if (state->ev_ctx == NULL) {
result = ISC_R_NOMEMORY;
goto failed;
}
- state->ev_ctx = tevent_context_init(state);
- if (state->ev_ctx == NULL) {
- result = ISC_R_NOMEMORY;
+ result = parse_options(state, argc, argv, &state->options);
+ if (result != ISC_R_SUCCESS) {
goto failed;
}
- state->samdb = ldb_init(state, state->ev_ctx);
- if (state->samdb == NULL) {
- state->log(ISC_LOG_ERROR, "samba dlz_bind9: Failed to create ldb");
- result = ISC_R_FAILURE;
+ state->lp = loadparm_init_global(true);
+ if (state->lp == NULL) {
+ result = ISC_R_NOMEMORY;
goto failed;
}
- url = talloc_asprintf(tmp_ctx, "ldapi://%s",
- private_path(tmp_ctx, state->lp, "ldap_priv/ldapi"));
- if (url == NULL) {
+ if (smb_krb5_init_context(state, state->ev_ctx, state->lp, &state->smb_krb5_ctx) != 0) {
result = ISC_R_NOMEMORY;
goto failed;
}
- ret = ldb_connect(state->samdb, url, 0, NULL);
- if (ret == -1) {
- state->log(ISC_LOG_ERROR, "samba dlz_bind9: Failed to connect to %s - %s",
- url, ldb_errstring(state->samdb));
+ nt_status = gensec_init();
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ talloc_free(tmp_ctx);
+ return false;
+ }
+
+ if (state->options.url == NULL) {
+ state->options.url = lpcfg_private_path(state, state->lp, "dns/sam.ldb");
+ if (state->options.url == NULL) {
+ result = ISC_R_NOMEMORY;
+ goto failed;
+ }
+ }
+
+ /* Do not install samba signal handlers */
+ fault_setup_disable();
+
+ state->samdb = samdb_connect_url(state, state->ev_ctx, state->lp,
+ system_session(state->lp), 0, state->options.url);
+ if (state->samdb == NULL) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: Failed to connect to %s",
+ state->options.url);
result = ISC_R_FAILURE;
goto failed;
}
dn = ldb_get_default_basedn(state->samdb);
if (dn == NULL) {
- state->log(ISC_LOG_ERROR, "samba dlz_bind9: Unable to get basedn for %s - %s",
- url, ldb_errstring(state->samdb));
+ state->log(ISC_LOG_ERROR, "samba_dlz: Unable to get basedn for %s - %s",
+ state->options.url, ldb_errstring(state->samdb));
result = ISC_R_FAILURE;
goto failed;
}
- state->log(ISC_LOG_INFO, "samba dlz_bind9: started for DN %s",
+ state->log(ISC_LOG_INFO, "samba_dlz: started for DN %s",
ldb_dn_get_linearized(dn));
*dbdata = state;
/*
shutdown the backend
*/
-_PUBLIC_ void dlz_destroy(void *driverarg, void *dbdata)
+_PUBLIC_ void dlz_destroy(void *dbdata)
{
struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
- state->log(ISC_LOG_INFO, "samba dlz_bind9: shutting down");
+ state->log(ISC_LOG_INFO, "samba_dlz: shutting down");
talloc_free(state);
}
/*
- see if we handle a given zone
+ return the base DN for a zone
*/
-_PUBLIC_ isc_result_t dlz_findzonedb(void *driverarg, void *dbdata, const char *name)
+static isc_result_t b9_find_zone_dn(struct dlz_bind9_data *state, const char *zone_name,
+ TALLOC_CTX *mem_ctx, struct ldb_dn **zone_dn)
{
- struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
- if (strcasecmp(lpcfg_dnsdomain(state->lp), name) == 0) {
- return ISC_R_SUCCESS;
+ int ret;
+ TALLOC_CTX *tmp_ctx = talloc_new(state);
+ const char *attrs[] = { NULL };
+ int i;
+
+ for (i=0; zone_prefixes[i]; i++) {
+ struct ldb_dn *dn;
+ struct ldb_result *res;
+
+ dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
+ if (dn == NULL) {
+ talloc_free(tmp_ctx);
+ return ISC_R_NOMEMORY;
+ }
+
+ if (!ldb_dn_add_child_fmt(dn, "DC=%s,%s", zone_name, zone_prefixes[i])) {
+ talloc_free(tmp_ctx);
+ return ISC_R_NOMEMORY;
+ }
+
+ ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE, attrs, "objectClass=dnsZone");
+ if (ret == LDB_SUCCESS) {
+ if (zone_dn != NULL) {
+ *zone_dn = talloc_steal(mem_ctx, dn);
+ }
+ talloc_free(tmp_ctx);
+ return ISC_R_SUCCESS;
+ }
+ talloc_free(dn);
+ }
+
+ talloc_free(tmp_ctx);
+ return ISC_R_NOTFOUND;
+}
+
+
+/*
+ return the DN for a name. The record does not need to exist, but the
+ zone must exist
+ */
+static isc_result_t b9_find_name_dn(struct dlz_bind9_data *state, const char *name,
+ TALLOC_CTX *mem_ctx, struct ldb_dn **dn)
+{
+ const char *p;
+
+ /* work through the name piece by piece, until we find a zone */
+ for (p=name; p; ) {
+ isc_result_t result;
+ result = b9_find_zone_dn(state, p, mem_ctx, dn);
+ if (result == ISC_R_SUCCESS) {
+ /* we found a zone, now extend the DN to get
+ * the full DN
+ */
+ bool ret;
+ if (p == name) {
+ ret = ldb_dn_add_child_fmt(*dn, "DC=@");
+ } else {
+ ret = ldb_dn_add_child_fmt(*dn, "DC=%.*s", (int)(p-name)-1, name);
+ }
+ if (!ret) {
+ talloc_free(*dn);
+ return ISC_R_NOMEMORY;
+ }
+ return ISC_R_SUCCESS;
+ }
+ p = strchr(p, '.');
+ if (p == NULL) {
+ break;
+ }
+ p++;
}
return ISC_R_NOTFOUND;
}
+/*
+ see if we handle a given zone
+ */
+_PUBLIC_ isc_result_t dlz_findzonedb(void *dbdata, const char *name)
+{
+ struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
+ return b9_find_zone_dn(state, name, NULL, NULL);
+}
+
+
/*
lookup one record
*/
-_PUBLIC_ isc_result_t dlz_lookup_types(struct dlz_bind9_data *state,
- const char *zone, const char *name,
- void *driverarg, dns_sdlzlookup_t *lookup,
- const char **types)
+static isc_result_t dlz_lookup_types(struct dlz_bind9_data *state,
+ const char *zone, const char *name,
+ dns_sdlzlookup_t *lookup,
+ const char **types)
{
- struct ldb_dn *dn;
TALLOC_CTX *tmp_ctx = talloc_new(state);
const char *attrs[] = { "dnsRecord", NULL };
- int ret, i;
+ int ret = LDB_SUCCESS, i;
struct ldb_result *res;
struct ldb_message_element *el;
+ struct ldb_dn *dn;
- dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
- if (dn == NULL) {
- talloc_free(tmp_ctx);
- return ISC_R_NOMEMORY;
- }
+ for (i=0; zone_prefixes[i]; i++) {
+ dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
+ if (dn == NULL) {
+ talloc_free(tmp_ctx);
+ return ISC_R_NOMEMORY;
+ }
- if (!ldb_dn_add_child_fmt(dn, "DC=%s,DC=%s,CN=MicrosoftDNS,DC=DomainDnsZones",
- name, zone)) {
- talloc_free(tmp_ctx);
- return ISC_R_NOMEMORY;
- }
+ if (!ldb_dn_add_child_fmt(dn, "DC=%s,DC=%s,%s", name, zone, zone_prefixes[i])) {
+ talloc_free(tmp_ctx);
+ return ISC_R_NOMEMORY;
+ }
- ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE,
- attrs, "objectClass=dnsNode");
+ ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE,
+ attrs, "objectClass=dnsNode");
+ if (ret == LDB_SUCCESS) {
+ break;
+ }
+ }
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ISC_R_NOTFOUND;
el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
if (el == NULL || el->num_values == 0) {
- state->log(ISC_LOG_INFO, "failed to find %s",
- ldb_dn_get_linearized(dn));
talloc_free(tmp_ctx);
return ISC_R_NOTFOUND;
}
ndr_err = ndr_pull_struct_blob(&el->values[i], tmp_ctx, &rec,
(ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
- state->log(ISC_LOG_ERROR, "samba dlz_bind9: failed to parse dnsRecord for %s",
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
ldb_dn_get_linearized(dn));
talloc_free(tmp_ctx);
return ISC_R_FAILURE;
/*
lookup one record
*/
-_PUBLIC_ isc_result_t dlz_lookup(const char *zone, const char *name, void *driverarg,
+_PUBLIC_ isc_result_t dlz_lookup(const char *zone, const char *name,
void *dbdata, dns_sdlzlookup_t *lookup)
{
struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
- return dlz_lookup_types(state, zone, name, driverarg, lookup, NULL);
+ return dlz_lookup_types(state, zone, name, lookup, NULL);
}
/*
see if a zone transfer is allowed
*/
-_PUBLIC_ isc_result_t dlz_allowzonexfr(void *driverarg, void *dbdata, const char *name,
- const char *client)
+_PUBLIC_ isc_result_t dlz_allowzonexfr(void *dbdata, const char *name, const char *client)
{
- struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
-
- if (strcasecmp(lpcfg_dnsdomain(state->lp), name) == 0) {
- /* TODO: check an ACL here? client is the IP of the requester */
- state->log(ISC_LOG_INFO, "samba dlz_bind9: allowing zone transfer for '%s' by '%s'",
- name, client);
- return ISC_R_SUCCESS;
- }
- return ISC_R_NOTFOUND;
+ /* just say yes for all our zones for now */
+ return dlz_findzonedb(dbdata, name);
}
/*
perform a zone transfer
*/
-_PUBLIC_ isc_result_t dlz_allnodes(const char *zone, void *driverarg, void *dbdata,
+_PUBLIC_ isc_result_t dlz_allnodes(const char *zone, void *dbdata,
dns_sdlzallnodes_t *allnodes)
{
struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
const char *attrs[] = { "dnsRecord", NULL };
- int ret, i, j;
+ int ret = LDB_SUCCESS, i, j;
struct ldb_dn *dn;
struct ldb_result *res;
TALLOC_CTX *tmp_ctx = talloc_new(state);
+ for (i=0; zone_prefixes[i]; i++) {
+ dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
+ if (dn == NULL) {
+ talloc_free(tmp_ctx);
+ return ISC_R_NOMEMORY;
+ }
- dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
- if (dn == NULL) {
- talloc_free(tmp_ctx);
- return ISC_R_NOMEMORY;
- }
+ if (!ldb_dn_add_child_fmt(dn, "DC=%s,%s", zone, zone_prefixes[i])) {
+ talloc_free(tmp_ctx);
+ return ISC_R_NOMEMORY;
+ }
- if (!ldb_dn_add_child_fmt(dn, "DC=%s,CN=MicrosoftDNS,DC=DomainDnsZones", zone)) {
- talloc_free(tmp_ctx);
- return ISC_R_NOMEMORY;
+ ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_SUBTREE,
+ attrs, "objectClass=dnsNode");
+ if (ret == LDB_SUCCESS) {
+ break;
+ }
}
-
- ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_SUBTREE,
- attrs, "objectClass=dnsNode");
if (ret != LDB_SUCCESS) {
talloc_free(tmp_ctx);
return ISC_R_NOTFOUND;
ndr_err = ndr_pull_struct_blob(&el->values[j], el_ctx, &rec,
(ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
- state->log(ISC_LOG_ERROR, "samba dlz_bind9: failed to parse dnsRecord for %s",
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
ldb_dn_get_linearized(dn));
- talloc_free(el_ctx);
continue;
}
result = b9_putnamedrr(state, allnodes, name, &rec);
if (result != ISC_R_SUCCESS) {
- talloc_free(el_ctx);
continue;
}
}
return ISC_R_SUCCESS;
}
+
+
+/*
+ start a transaction
+ */
+_PUBLIC_ isc_result_t dlz_newversion(const char *zone, void *dbdata, void **versionp)
+{
+ struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
+
+ state->log(ISC_LOG_INFO, "samba_dlz: starting transaction on zone %s", zone);
+
+ if (state->transaction_token != NULL) {
+ state->log(ISC_LOG_INFO, "samba_dlz: transaction already started for zone %s", zone);
+ return ISC_R_FAILURE;
+ }
+
+ state->transaction_token = talloc_zero(state, int);
+ if (state->transaction_token == NULL) {
+ return ISC_R_NOMEMORY;
+ }
+
+ if (ldb_transaction_start(state->samdb) != LDB_SUCCESS) {
+ state->log(ISC_LOG_INFO, "samba_dlz: failed to start a transaction for zone %s", zone);
+ talloc_free(state->transaction_token);
+ state->transaction_token = NULL;
+ return ISC_R_FAILURE;
+ }
+
+ *versionp = (void *)state->transaction_token;
+
+ return ISC_R_SUCCESS;
+}
+
+/*
+ end a transaction
+ */
+_PUBLIC_ void dlz_closeversion(const char *zone, isc_boolean_t commit,
+ void *dbdata, void **versionp)
+{
+ struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
+
+ if (state->transaction_token != (int *)*versionp) {
+ state->log(ISC_LOG_INFO, "samba_dlz: transaction not started for zone %s", zone);
+ return;
+ }
+
+ if (commit) {
+ if (ldb_transaction_commit(state->samdb) != LDB_SUCCESS) {
+ state->log(ISC_LOG_INFO, "samba_dlz: failed to commit a transaction for zone %s", zone);
+ return;
+ }
+ state->log(ISC_LOG_INFO, "samba_dlz: committed transaction on zone %s", zone);
+ } else {
+ if (ldb_transaction_cancel(state->samdb) != LDB_SUCCESS) {
+ state->log(ISC_LOG_INFO, "samba_dlz: failed to cancel a transaction for zone %s", zone);
+ return;
+ }
+ state->log(ISC_LOG_INFO, "samba_dlz: cancelling transaction on zone %s", zone);
+ }
+
+ talloc_free(state->transaction_token);
+ state->transaction_token = NULL;
+ *versionp = NULL;
+}
+
+
+/*
+ see if there is a SOA record for a zone
+ */
+static bool b9_has_soa(struct dlz_bind9_data *state, struct ldb_dn *dn, const char *zone)
+{
+ const char *attrs[] = { "dnsRecord", NULL };
+ struct ldb_result *res;
+ struct ldb_message_element *el;
+ TALLOC_CTX *tmp_ctx = talloc_new(state);
+ int ret, i;
+
+ if (!ldb_dn_add_child_fmt(dn, "DC=@,DC=%s", zone)) {
+ talloc_free(tmp_ctx);
+ return false;
+ }
+
+ ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE,
+ attrs, "objectClass=dnsNode");
+ if (ret != LDB_SUCCESS) {
+ talloc_free(tmp_ctx);
+ return false;
+ }
+
+ el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
+ if (el == NULL) {
+ talloc_free(tmp_ctx);
+ return false;
+ }
+ for (i=0; i<el->num_values; i++) {
+ struct dnsp_DnssrvRpcRecord rec;
+ enum ndr_err_code ndr_err;
+
+ ndr_err = ndr_pull_struct_blob(&el->values[i], tmp_ctx, &rec,
+ (ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ continue;
+ }
+ if (rec.wType == DNS_TYPE_SOA) {
+ talloc_free(tmp_ctx);
+ return true;
+ }
+ }
+
+ talloc_free(tmp_ctx);
+ return false;
+}
+
+/*
+ configure a writeable zone
+ */
+_PUBLIC_ isc_result_t dlz_configure(dns_view_t *view, void *dbdata)
+{
+ struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
+ TALLOC_CTX *tmp_ctx;
+ struct ldb_dn *dn;
+ int i;
+
+ state->log(ISC_LOG_INFO, "samba_dlz: starting configure");
+ if (state->writeable_zone == NULL) {
+ state->log(ISC_LOG_INFO, "samba_dlz: no writeable_zone method available");
+ return ISC_R_FAILURE;
+ }
+
+ tmp_ctx = talloc_new(state);
+
+ for (i=0; zone_prefixes[i]; i++) {
+ const char *attrs[] = { "name", NULL };
+ int j, ret;
+ struct ldb_result *res;
+
+ dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
+ if (dn == NULL) {
+ talloc_free(tmp_ctx);
+ return ISC_R_NOMEMORY;
+ }
+
+ if (!ldb_dn_add_child_fmt(dn, "%s", zone_prefixes[i])) {
+ talloc_free(tmp_ctx);
+ return ISC_R_NOMEMORY;
+ }
+
+ ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_SUBTREE,
+ attrs, "objectClass=dnsZone");
+ if (ret != LDB_SUCCESS) {
+ continue;
+ }
+
+ for (j=0; j<res->count; j++) {
+ isc_result_t result;
+ const char *zone = ldb_msg_find_attr_as_string(res->msgs[j], "name", NULL);
+ struct ldb_dn *zone_dn;
+
+ if (zone == NULL) {
+ continue;
+ }
+ zone_dn = ldb_dn_copy(tmp_ctx, dn);
+ if (zone_dn == NULL) {
+ talloc_free(tmp_ctx);
+ return ISC_R_NOMEMORY;
+ }
+
+ if (!b9_has_soa(state, zone_dn, zone)) {
+ continue;
+ }
+ result = state->writeable_zone(view, zone);
+ if (result != ISC_R_SUCCESS) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: Failed to configure zone '%s'",
+ zone);
+ talloc_free(tmp_ctx);
+ return result;
+ }
+ state->log(ISC_LOG_INFO, "samba_dlz: configured writeable zone '%s'", zone);
+ }
+ }
+
+ talloc_free(tmp_ctx);
+ return ISC_R_SUCCESS;
+}
+
+static char *strlower(char *str)
+{
+ int i;
+
+ for (i=0; i<strlen(str); i++) {
+ str[i] = (char) tolower(str[i]);
+ }
+
+ return str;
+}
+
+/*
+ authorize a zone update
+ */
+_PUBLIC_ isc_boolean_t dlz_ssumatch(const char *signer, const char *name, const char *tcpaddr,
+ const char *type, const char *key, uint32_t keydatalen, uint8_t *keydata,
+ void *dbdata)
+{
+ struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
+ TALLOC_CTX *tmp_ctx;
+ DATA_BLOB ap_req;
+ struct cli_credentials *server_credentials;
+ char *keytab_name, *username;
+ bool ret;
+ int ldb_ret;
+ NTSTATUS nt_status;
+ struct gensec_security *gensec_ctx;
+ struct auth_session_info *session_info;
+ struct ldb_dn *dn;
+ isc_result_t result;
+ struct ldb_result *res;
+ const char * attrs[] = { NULL };
+ uint32_t access_mask;
+
+ /* Remove cached credentials, if any */
+ if (state->session_info) {
+ talloc_free(state->session_info);
+ state->session_info = NULL;
+ }
+ if (state->update_name) {
+ talloc_free(state->update_name);
+ state->update_name = NULL;
+ }
+
+ tmp_ctx = talloc_new(NULL);
+ if (tmp_ctx == NULL) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: no memory");
+ return false;
+ }
+
+ ap_req = data_blob_const(keydata, keydatalen);
+ server_credentials = cli_credentials_init(tmp_ctx);
+ if (!server_credentials) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to init server credentials");
+ talloc_free(tmp_ctx);
+ return false;
+ }
+
+ cli_credentials_set_krb5_context(server_credentials, state->smb_krb5_ctx);
+ cli_credentials_set_conf(server_credentials, state->lp);
+
+ username = talloc_asprintf(tmp_ctx, "dns-%s", lpcfg_netbios_name(state->lp));
+ username = strlower(username);
+ cli_credentials_set_username(server_credentials, username, CRED_SPECIFIED);
+ talloc_free(username);
+
+ keytab_name = talloc_asprintf(tmp_ctx, "file:%s/dns.keytab",
+ lpcfg_private_dir(state->lp));
+ ret = cli_credentials_set_keytab_name(server_credentials, state->lp, keytab_name,
+ CRED_SPECIFIED);
+ talloc_free(keytab_name);
+ if (ret != 0) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to obtain server credentials for %s",
+ username);
+ talloc_free(tmp_ctx);
+ return false;
+ }
+
+ nt_status = gensec_server_start(tmp_ctx,
+ lpcfg_gensec_settings(tmp_ctx, state->lp),
+ NULL, &gensec_ctx);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to start gensec server");
+ talloc_free(tmp_ctx);
+ return false;
+ }
+
+ gensec_set_credentials(gensec_ctx, server_credentials);
+ gensec_set_target_service(gensec_ctx, "dns");
+
+ nt_status = gensec_start_mech_by_name(gensec_ctx, "spnego");
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to start spnego");
+ talloc_free(tmp_ctx);
+ return false;
+ }
+
+ nt_status = gensec_update(gensec_ctx, tmp_ctx, state->ev_ctx, ap_req, &ap_req);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: spnego update failed");
+ talloc_free(tmp_ctx);
+ return false;
+ }
+
+ nt_status = gensec_session_info(gensec_ctx, tmp_ctx, &session_info);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to create session info");
+ talloc_free(tmp_ctx);
+ return false;
+ }
+
+ /* Get the DN from name */
+ result = b9_find_name_dn(state, name, tmp_ctx, &dn);
+ if (result != ISC_R_SUCCESS) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to find name %s", name);
+ talloc_free(tmp_ctx);
+ return false;
+ }
+
+ /* make sure the dn exists, or find parent dn in case new object is being added */
+ ldb_ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE,
+ attrs, "objectClass=dnsNode");
+ if (ldb_ret == LDB_ERR_NO_SUCH_OBJECT) {
+ ldb_dn_remove_child_components(dn, 1);
+ access_mask = SEC_ADS_CREATE_CHILD;
+ talloc_free(res);
+ } else if (ldb_ret == LDB_SUCCESS) {
+ access_mask = SEC_STD_REQUIRED | SEC_ADS_SELF_WRITE;
+ talloc_free(res);
+ } else {
+ talloc_free(tmp_ctx);
+ return false;
+ }
+
+ /* Do ACL check */
+ ldb_ret = dsdb_check_access_on_dn(state->samdb, tmp_ctx, dn,
+ session_info->security_token,
+ access_mask, NULL);
+ if (ldb_ret != LDB_SUCCESS) {
+ state->log(ISC_LOG_INFO,
+ "samba_dlz: disallowing update of signer=%s name=%s type=%s error=%s",
+ signer, name, type, ldb_strerror(ldb_ret));
+ talloc_free(tmp_ctx);
+ return false;
+ }
+
+ /* Cache session_info, so it can be used in the actual add/delete operation */
+ state->update_name = talloc_strdup(state, name);
+ if (state->update_name == NULL) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: memory allocation error");
+ talloc_free(tmp_ctx);
+ return false;
+ }
+ state->session_info = talloc_steal(state, session_info);
+
+ state->log(ISC_LOG_INFO, "samba_dlz: allowing update of signer=%s name=%s tcpaddr=%s type=%s key=%s",
+ signer, name, tcpaddr, type, key);
+
+ talloc_free(tmp_ctx);
+ return true;
+}
+
+
+/*
+ add a new record
+ */
+static isc_result_t b9_add_record(struct dlz_bind9_data *state, const char *name,
+ struct ldb_dn *dn,
+ struct dnsp_DnssrvRpcRecord *rec)
+{
+ struct ldb_message *msg;
+ enum ndr_err_code ndr_err;
+ struct ldb_val v;
+ int ret;
+
+ msg = ldb_msg_new(rec);
+ if (msg == NULL) {
+ return ISC_R_NOMEMORY;
+ }
+ msg->dn = dn;
+ ret = ldb_msg_add_string(msg, "objectClass", "dnsNode");
+ if (ret != LDB_SUCCESS) {
+ return ISC_R_FAILURE;
+ }
+
+ ndr_err = ndr_push_struct_blob(&v, rec, rec, (ndr_push_flags_fn_t)ndr_push_dnsp_DnssrvRpcRecord);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ return ISC_R_FAILURE;
+ }
+ ret = ldb_msg_add_value(msg, "dnsRecord", &v, NULL);
+ if (ret != LDB_SUCCESS) {
+ return ISC_R_FAILURE;
+ }
+
+ ret = ldb_add(state->samdb, msg);
+ if (ret != LDB_SUCCESS) {
+ return ISC_R_FAILURE;
+ }
+
+ return ISC_R_SUCCESS;
+}
+
+/*
+ see if two DNS names are the same
+ */
+static bool dns_name_equal(const char *name1, const char *name2)
+{
+ size_t len1 = strlen(name1);
+ size_t len2 = strlen(name2);
+ if (name1[len1-1] == '.') len1--;
+ if (name2[len2-1] == '.') len2--;
+ if (len1 != len2) {
+ return false;
+ }
+ return strncasecmp_m(name1, name2, len1) == 0;
+}
+
+
+/*
+ see if two dns records match
+ */
+static bool b9_record_match(struct dlz_bind9_data *state,
+ struct dnsp_DnssrvRpcRecord *rec1, struct dnsp_DnssrvRpcRecord *rec2)
+{
+ if (rec1->wType != rec2->wType) {
+ return false;
+ }
+ /* see if this type is single valued */
+ if (b9_single_valued(rec1->wType)) {
+ return true;
+ }
+
+ /* see if the data matches */
+ switch (rec1->wType) {
+ case DNS_TYPE_A:
+ return strcmp(rec1->data.ipv4, rec2->data.ipv4) == 0;
+ case DNS_TYPE_AAAA:
+ return strcmp(rec1->data.ipv6, rec2->data.ipv6) == 0;
+ case DNS_TYPE_CNAME:
+ return dns_name_equal(rec1->data.cname, rec2->data.cname);
+ case DNS_TYPE_TXT:
+ return strcmp(rec1->data.txt, rec2->data.txt) == 0;
+ case DNS_TYPE_PTR:
+ return strcmp(rec1->data.ptr, rec2->data.ptr) == 0;
+ case DNS_TYPE_NS:
+ return dns_name_equal(rec1->data.ns, rec2->data.ns);
+
+ case DNS_TYPE_SRV:
+ return rec1->data.srv.wPriority == rec2->data.srv.wPriority &&
+ rec1->data.srv.wWeight == rec2->data.srv.wWeight &&
+ rec1->data.srv.wPort == rec2->data.srv.wPort &&
+ dns_name_equal(rec1->data.srv.nameTarget, rec2->data.srv.nameTarget);
+
+ case DNS_TYPE_MX:
+ return rec1->data.mx.wPriority == rec2->data.mx.wPriority &&
+ dns_name_equal(rec1->data.mx.nameTarget, rec2->data.mx.nameTarget);
+
+ case DNS_TYPE_HINFO:
+ return strcmp(rec1->data.hinfo.cpu, rec2->data.hinfo.cpu) == 0 &&
+ strcmp(rec1->data.hinfo.os, rec2->data.hinfo.os) == 0;
+
+ case DNS_TYPE_SOA:
+ return dns_name_equal(rec1->data.soa.mname, rec2->data.soa.mname) &&
+ dns_name_equal(rec1->data.soa.rname, rec2->data.soa.rname) &&
+ rec1->data.soa.serial == rec2->data.soa.serial &&
+ rec1->data.soa.refresh == rec2->data.soa.refresh &&
+ rec1->data.soa.retry == rec2->data.soa.retry &&
+ rec1->data.soa.expire == rec2->data.soa.expire &&
+ rec1->data.soa.minimum == rec2->data.soa.minimum;
+ default:
+ state->log(ISC_LOG_ERROR, "samba b9_putrr: unhandled record type %u",
+ rec1->wType);
+ break;
+ }
+
+ return false;
+}
+
+/*
+ * Update session_info on samdb using the cached credentials
+ */
+static bool b9_set_session_info(struct dlz_bind9_data *state, const char *name)
+{
+ int ret;
+
+ if (state->update_name == NULL || state->session_info == NULL) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: invalid credentials");
+ return false;
+ }
+
+ /* Do not use client credentials, if we not updating the client specified name */
+ if (strcmp(state->update_name, name) != 0) {
+ return true;
+ }
+
+ ret = ldb_set_opaque(state->samdb, "sessionInfo", state->session_info);
+ if (ret != LDB_SUCCESS) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: unable to set session info");
+ return false;
+ }
+
+ return true;
+}
+
+/*
+ * Reset session_info on samdb as system session
+ */
+static void b9_reset_session_info(struct dlz_bind9_data *state)
+{
+ ldb_set_opaque(state->samdb, "sessionInfo", system_session(state->lp));
+}
+
+/*
+ add or modify a rdataset
+ */
+_PUBLIC_ isc_result_t dlz_addrdataset(const char *name, const char *rdatastr, void *dbdata, void *version)
+{
+ struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
+ struct dnsp_DnssrvRpcRecord *rec;
+ struct ldb_dn *dn;
+ isc_result_t result;
+ struct ldb_result *res;
+ const char *attrs[] = { "dnsRecord", NULL };
+ int ret, i;
+ struct ldb_message_element *el;
+ enum ndr_err_code ndr_err;
+ NTTIME t;
+
+ if (state->transaction_token != (void*)version) {
+ state->log(ISC_LOG_INFO, "samba_dlz: bad transaction version");
+ return ISC_R_FAILURE;
+ }
+
+ rec = talloc_zero(state, struct dnsp_DnssrvRpcRecord);
+ if (rec == NULL) {
+ return ISC_R_NOMEMORY;
+ }
+
+ unix_to_nt_time(&t, time(NULL));
+ t /= 10*1000*1000; /* convert to seconds (NT time is in 100ns units) */
+ t /= 3600; /* convert to hours */
+
+ rec->rank = DNS_RANK_ZONE;
+ rec->dwSerial = state->soa_serial;
+ rec->dwTimeStamp = (uint32_t)t;
+
+ if (!b9_parse(state, rdatastr, rec)) {
+ state->log(ISC_LOG_INFO, "samba_dlz: failed to parse rdataset '%s'", rdatastr);
+ talloc_free(rec);
+ return ISC_R_FAILURE;
+ }
+
+ /* find the DN of the record */
+ result = b9_find_name_dn(state, name, rec, &dn);
+ if (result != ISC_R_SUCCESS) {
+ talloc_free(rec);
+ return result;
+ }
+
+ /* get any existing records */
+ ret = ldb_search(state->samdb, rec, &res, dn, LDB_SCOPE_BASE, attrs, "objectClass=dnsNode");
+ if (ret == LDB_ERR_NO_SUCH_OBJECT) {
+ if (!b9_set_session_info(state, name)) {
+ talloc_free(rec);
+ return ISC_R_FAILURE;
+ }
+ result = b9_add_record(state, name, dn, rec);
+ b9_reset_session_info(state);
+ talloc_free(rec);
+ if (result == ISC_R_SUCCESS) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: added %s %s", name, rdatastr);
+ }
+ return result;
+ }
+
+ /* there are existing records. We need to see if this will
+ * replace a record or add to it
+ */
+ el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
+ if (el == NULL) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: no dnsRecord attribute for %s",
+ ldb_dn_get_linearized(dn));
+ talloc_free(rec);
+ return ISC_R_FAILURE;
+ }
+
+ for (i=0; i<el->num_values; i++) {
+ struct dnsp_DnssrvRpcRecord rec2;
+
+ ndr_err = ndr_pull_struct_blob(&el->values[i], rec, &rec2,
+ (ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
+ ldb_dn_get_linearized(dn));
+ talloc_free(rec);
+ return ISC_R_FAILURE;
+ }
+
+ if (b9_record_match(state, rec, &rec2)) {
+ break;
+ }
+ }
+ if (i == el->num_values) {
+ /* adding a new value */
+ el->values = talloc_realloc(el, el->values, struct ldb_val, el->num_values+1);
+ if (el->values == NULL) {
+ talloc_free(rec);
+ return ISC_R_NOMEMORY;
+ }
+ el->num_values++;
+ }
+
+ ndr_err = ndr_push_struct_blob(&el->values[i], rec, rec,
+ (ndr_push_flags_fn_t)ndr_push_dnsp_DnssrvRpcRecord);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to push dnsRecord for %s",
+ ldb_dn_get_linearized(dn));
+ talloc_free(rec);
+ return ISC_R_FAILURE;
+ }
+
+
+ if (!b9_set_session_info(state, name)) {
+ talloc_free(rec);
+ return ISC_R_FAILURE;
+ }
+
+ /* modify the record */
+ el->flags = LDB_FLAG_MOD_REPLACE;
+ ret = ldb_modify(state->samdb, res->msgs[0]);
+ b9_reset_session_info(state);
+ if (ret != LDB_SUCCESS) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to modify %s - %s",
+ ldb_dn_get_linearized(dn), ldb_errstring(state->samdb));
+ talloc_free(rec);
+ return ISC_R_FAILURE;
+ }
+
+ state->log(ISC_LOG_INFO, "samba_dlz: added rdataset %s '%s'", name, rdatastr);
+
+ talloc_free(rec);
+ return ISC_R_SUCCESS;
+}
+
+/*
+ remove a rdataset
+ */
+_PUBLIC_ isc_result_t dlz_subrdataset(const char *name, const char *rdatastr, void *dbdata, void *version)
+{
+ struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
+ struct dnsp_DnssrvRpcRecord *rec;
+ struct ldb_dn *dn;
+ isc_result_t result;
+ struct ldb_result *res;
+ const char *attrs[] = { "dnsRecord", NULL };
+ int ret, i;
+ struct ldb_message_element *el;
+ enum ndr_err_code ndr_err;
+
+ if (state->transaction_token != (void*)version) {
+ state->log(ISC_LOG_INFO, "samba_dlz: bad transaction version");
+ return ISC_R_FAILURE;
+ }
+
+ rec = talloc_zero(state, struct dnsp_DnssrvRpcRecord);
+ if (rec == NULL) {
+ return ISC_R_NOMEMORY;
+ }
+
+ if (!b9_parse(state, rdatastr, rec)) {
+ state->log(ISC_LOG_INFO, "samba_dlz: failed to parse rdataset '%s'", rdatastr);
+ talloc_free(rec);
+ return ISC_R_FAILURE;
+ }
+
+ /* find the DN of the record */
+ result = b9_find_name_dn(state, name, rec, &dn);
+ if (result != ISC_R_SUCCESS) {
+ talloc_free(rec);
+ return result;
+ }
+
+ /* get the existing records */
+ ret = ldb_search(state->samdb, rec, &res, dn, LDB_SCOPE_BASE, attrs, "objectClass=dnsNode");
+ if (ret == LDB_ERR_NO_SUCH_OBJECT) {
+ talloc_free(rec);
+ return ISC_R_NOTFOUND;
+ }
+
+ /* there are existing records. We need to see if any match
+ */
+ el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
+ if (el == NULL || el->num_values == 0) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: no dnsRecord attribute for %s",
+ ldb_dn_get_linearized(dn));
+ talloc_free(rec);
+ return ISC_R_FAILURE;
+ }
+
+ for (i=0; i<el->num_values; i++) {
+ struct dnsp_DnssrvRpcRecord rec2;
+
+ ndr_err = ndr_pull_struct_blob(&el->values[i], rec, &rec2,
+ (ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
+ ldb_dn_get_linearized(dn));
+ talloc_free(rec);
+ return ISC_R_FAILURE;
+ }
+
+ if (b9_record_match(state, rec, &rec2)) {
+ break;
+ }
+ }
+ if (i == el->num_values) {
+ talloc_free(rec);
+ return ISC_R_NOTFOUND;
+ }
+
+ if (i < el->num_values-1) {
+ memmove(&el->values[i], &el->values[i+1], sizeof(el->values[0])*((el->num_values-1)-i));
+ }
+ el->num_values--;
+
+ if (!b9_set_session_info(state, name)) {
+ talloc_free(rec);
+ return ISC_R_FAILURE;
+ }
+
+ if (el->num_values == 0) {
+ /* delete the record */
+ ret = ldb_delete(state->samdb, dn);
+ b9_reset_session_info(state);
+ } else {
+ /* modify the record */
+ el->flags = LDB_FLAG_MOD_REPLACE;
+ ret = ldb_modify(state->samdb, res->msgs[0]);
+ }
+ b9_reset_session_info(state);
+ if (ret != LDB_SUCCESS) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to modify %s - %s",
+ ldb_dn_get_linearized(dn), ldb_errstring(state->samdb));
+ talloc_free(rec);
+ return ISC_R_FAILURE;
+ }
+
+ state->log(ISC_LOG_INFO, "samba_dlz: subtracted rdataset %s '%s'", name, rdatastr);
+
+ talloc_free(rec);
+ return ISC_R_SUCCESS;
+}
+
+
+/*
+ delete all records of the given type
+ */
+_PUBLIC_ isc_result_t dlz_delrdataset(const char *name, const char *type, void *dbdata, void *version)
+{
+ struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
+ TALLOC_CTX *tmp_ctx;
+ struct ldb_dn *dn;
+ isc_result_t result;
+ struct ldb_result *res;
+ const char *attrs[] = { "dnsRecord", NULL };
+ int ret, i;
+ struct ldb_message_element *el;
+ enum ndr_err_code ndr_err;
+ enum dns_record_type dns_type;
+ bool found = false;
+
+ if (state->transaction_token != (void*)version) {
+ state->log(ISC_LOG_INFO, "samba_dlz: bad transaction version");
+ return ISC_R_FAILURE;
+ }
+
+ if (!b9_dns_type(type, &dns_type)) {
+ state->log(ISC_LOG_INFO, "samba_dlz: bad dns type %s in delete", type);
+ return ISC_R_FAILURE;
+ }
+
+ tmp_ctx = talloc_new(state);
+
+ /* find the DN of the record */
+ result = b9_find_name_dn(state, name, tmp_ctx, &dn);
+ if (result != ISC_R_SUCCESS) {
+ talloc_free(tmp_ctx);
+ return result;
+ }
+
+ /* get the existing records */
+ ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE, attrs, "objectClass=dnsNode");
+ if (ret == LDB_ERR_NO_SUCH_OBJECT) {
+ talloc_free(tmp_ctx);
+ return ISC_R_NOTFOUND;
+ }
+
+ /* there are existing records. We need to see if any match the type
+ */
+ el = ldb_msg_find_element(res->msgs[0], "dnsRecord");
+ if (el == NULL || el->num_values == 0) {
+ talloc_free(tmp_ctx);
+ return ISC_R_NOTFOUND;
+ }
+
+ for (i=0; i<el->num_values; i++) {
+ struct dnsp_DnssrvRpcRecord rec2;
+
+ ndr_err = ndr_pull_struct_blob(&el->values[i], tmp_ctx, &rec2,
+ (ndr_pull_flags_fn_t)ndr_pull_dnsp_DnssrvRpcRecord);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s",
+ ldb_dn_get_linearized(dn));
+ talloc_free(tmp_ctx);
+ return ISC_R_FAILURE;
+ }
+
+ if (dns_type == rec2.wType) {
+ if (i < el->num_values-1) {
+ memmove(&el->values[i], &el->values[i+1],
+ sizeof(el->values[0])*((el->num_values-1)-i));
+ }
+ el->num_values--;
+ i--;
+ found = true;
+ }
+ }
+
+ if (!found) {
+ talloc_free(tmp_ctx);
+ return ISC_R_FAILURE;
+ }
+
+ if (!b9_set_session_info(state, name)) {
+ talloc_free(tmp_ctx);
+ return ISC_R_FAILURE;
+ }
+
+ if (el->num_values == 0) {
+ /* delete the record */
+ ret = ldb_delete(state->samdb, dn);
+ } else {
+ /* modify the record */
+ el->flags = LDB_FLAG_MOD_REPLACE;
+ ret = ldb_modify(state->samdb, res->msgs[0]);
+ }
+ b9_reset_session_info(state);
+ if (ret != LDB_SUCCESS) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to delete type %s in %s - %s",
+ type, ldb_dn_get_linearized(dn), ldb_errstring(state->samdb));
+ talloc_free(tmp_ctx);
+ return ISC_R_FAILURE;
+ }
+
+ state->log(ISC_LOG_INFO, "samba_dlz: deleted rdataset %s of type %s", name, type);
+
+ talloc_free(tmp_ctx);
+ return ISC_R_SUCCESS;
+}
git.samba.org / samba.git / blobdiff