#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 "lib/cmdline/popt_common.h"
-#include "lib/cmdline/popt_credentials.h"
-#include "ldb_module.h"
-#include "dlz_bind9.h"
+#include "gen_ndr/server_id.h"
+#include "messaging/messaging.h"
+#include <popt.h>
+#include "lib/util/dlinklist.h"
+#include "dlz_minimal.h"
+#include "dns_server/dnsserver_common.h"
+
+struct b9_options {
+ const char *url;
+ const char *debug;
+};
+
+struct b9_zone {
+ char *name;
+ struct b9_zone *prev, *next;
+};
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;
+ struct b9_zone *zonelist;
+
+ /* Used for dynamic update */
+ struct smb_krb5_context *smb_krb5_ctx;
+ struct auth4_context *auth_context;
+ struct auth_session_info *session_info;
+ char *update_name;
/* helper functions from the dlz_dlopen driver */
- void (*log)(int level, const char *fmt, ...);
- isc_result_t (*putrr)(dns_sdlzlookup_t *handle, const char *type,
- 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);
+ log_t *log;
+ dns_sdlz_putrr_t *putrr;
+ dns_sdlz_putnamedrr_t *putnamedrr;
+ dns_dlz_writeablezone_t *writeable_zone;
+};
+
+static struct dlz_bind9_data *dlz_bind9_state = NULL;
+static int dlz_bind9_state_ref_count = 0;
+
+static const char *zone_prefixes[] = {
+ "CN=MicrosoftDNS,DC=DomainDnsZones",
+ "CN=MicrosoftDNS,DC=ForestDnsZones",
+ "CN=MicrosoftDNS,CN=System",
+ NULL
};
/*
if (strcmp(helper_name, "putnamedrr") == 0) {
state->putnamedrr = ptr;
}
+ if (strcmp(helper_name, "writeable_zone") == 0) {
+ state->writeable_zone = ptr;
+ }
+}
+
+/*
+ * Add a trailing '.' if it's missing
+ */
+static const char *b9_format_fqdn(TALLOC_CTX *mem_ctx, const char *str)
+{
+ size_t len;
+ const char *tmp;
+
+ if (str == NULL || str[0] == '\0') {
+ return str;
+ }
+
+ len = strlen(str);
+ if (str[len-1] != '.') {
+ tmp = talloc_asprintf(mem_ctx, "%s.", str);
+ } else {
+ tmp = str;
+ }
+ return tmp;
}
/*
struct dnsp_DnssrvRpcRecord *rec,
const char **type, const char **data)
{
+ uint32_t i;
+ char *tmp;
+ const char *fqdn;
+
switch (rec->wType) {
case DNS_TYPE_A:
*type = "a";
case DNS_TYPE_CNAME:
*type = "cname";
- *data = rec->data.cname;
+ *data = b9_format_fqdn(mem_ctx, rec->data.cname);
break;
case DNS_TYPE_TXT:
*type = "txt";
- *data = rec->data.txt;
+ tmp = talloc_asprintf(mem_ctx, "\"%s\"", rec->data.txt.str[0]);
+ for (i=1; i<rec->data.txt.count; i++) {
+ tmp = talloc_asprintf_append(tmp, " \"%s\"", rec->data.txt.str[i]);
+ }
+ *data = tmp;
break;
case DNS_TYPE_PTR:
*type = "ptr";
- *data = rec->data.ptr;
+ *data = b9_format_fqdn(mem_ctx, rec->data.ptr);
break;
case DNS_TYPE_SRV:
*type = "srv";
+ fqdn = b9_format_fqdn(mem_ctx, rec->data.srv.nameTarget);
+ if (fqdn == NULL) {
+ return false;
+ }
*data = talloc_asprintf(mem_ctx, "%u %u %u %s",
rec->data.srv.wPriority,
rec->data.srv.wWeight,
rec->data.srv.wPort,
- rec->data.srv.nameTarget);
+ fqdn);
break;
case DNS_TYPE_MX:
*type = "mx";
+ fqdn = b9_format_fqdn(mem_ctx, rec->data.mx.nameTarget);
+ if (fqdn == NULL) {
+ return false;
+ }
*data = talloc_asprintf(mem_ctx, "%u %s",
- rec->data.srv.wPriority,
- rec->data.srv.nameTarget);
+ rec->data.mx.wPriority, fqdn);
break;
case DNS_TYPE_HINFO:
case DNS_TYPE_NS:
*type = "ns";
- *data = rec->data.ns;
+ *data = b9_format_fqdn(mem_ctx, 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;
+ }
+
+ fqdn = b9_format_fqdn(mem_ctx, rec->data.soa.rname);
+ if (fqdn == 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,
- rec->data.soa.rname,
+ mname, fqdn,
rec->data.soa.serial,
rec->data.soa.refresh,
rec->data.soa.retry,
rec->data.soa.expire,
rec->data.soa.minimum);
break;
+ }
+
+ default:
+ state->log(ISC_LOG_ERROR, "samba_dlz b9_format: unhandled record type %u",
+ rec->wType);
+ return false;
+ }
+
+ 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, *tmp, *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:
+ rec->data.txt.count = 0;
+ rec->data.txt.str = talloc_array(rec, const char *, rec->data.txt.count);
+ tmp = strtok_r(NULL, "\t", &saveptr);
+ while (tmp) {
+ rec->data.txt.str = talloc_realloc(rec, rec->data.txt.str, const char *,
+ rec->data.txt.count+1);
+ if (tmp[0] == '"') {
+ /* Strip quotes */
+ rec->data.txt.str[rec->data.txt.count] = talloc_strndup(rec, &tmp[1], strlen(tmp)-2);
+ } else {
+ rec->data.txt.str[rec->data.txt.count] = talloc_strdup(rec, tmp);
+ }
+ rec->data.txt.count++;
+ tmp = strtok_r(NULL, " ", &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_putrr: unhandled record type %u",
+ state->log(ISC_LOG_ERROR, "samba_dlz 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_dlz b9_parse: unexpected data at end of string for '%s'",
+ rdatastr);
+ return false;
+ }
+
return true;
}
/*
- send a resource recond to bind9
+ send a resource record to bind9
*/
static isc_result_t b9_putrr(struct dlz_bind9_data *state,
void *handle, struct dnsp_DnssrvRpcRecord *rec,
/*
- send a named resource recond to bind9
+ send a named resource record to bind9
*/
static isc_result_t b9_putnamedrr(struct dlz_bind9_data *state,
void *handle, const char *name,
return result;
}
-struct b9_options {
- const char *url;
-};
-
/*
parse options
*/
static isc_result_t parse_options(struct dlz_bind9_data *state,
- unsigned int argc, char *argv[],
+ unsigned int argc, const char **argv,
struct b9_options *options)
{
int opt;
poptContext pc;
struct poptOption long_options[] = {
- { "url", 'H', POPT_ARG_STRING, &options->url, 0, "database URL", "URL" },
+ { "url", 'H', POPT_ARG_STRING, &options->url, 0, "database URL", "URL" },
+ { "debug", 'd', POPT_ARG_STRING, &options->debug, 0, "debug level", "DEBUG" },
{ NULL }
};
- struct poptOption **popt_options;
- int ret;
-
- popt_options = ldb_module_popt_options(state->samdb);
- (*popt_options) = long_options;
-
- ret = ldb_modules_hook(state->samdb, LDB_MODULE_HOOK_CMDLINE_OPTIONS);
- if (ret != LDB_SUCCESS) {
- state->log(ISC_LOG_ERROR, "dlz samba: failed cmdline hook");
- return ISC_R_FAILURE;
- }
-
- pc = poptGetContext("dlz_bind9", argc, (const char **)argv, *popt_options,
- POPT_CONTEXT_KEEP_FIRST);
+ pc = poptGetContext("dlz_bind9", argc, argv, long_options,
+ POPT_CONTEXT_KEEP_FIRST);
while ((opt = poptGetNextOpt(pc)) != -1) {
switch (opt) {
default:
- state->log(ISC_LOG_ERROR, "dlz samba: Invalid option %s: %s",
+ state->log(ISC_LOG_ERROR, "dlz_bind9: Invalid option %s: %s",
poptBadOption(pc, 0), poptStrerror(opt));
return ISC_R_FAILURE;
}
}
- ret = ldb_modules_hook(state->samdb, LDB_MODULE_HOOK_CMDLINE_PRECONNECT);
- if (ret != LDB_SUCCESS) {
- state->log(ISC_LOG_ERROR, "dlz samba: failed cmdline preconnect");
- return ISC_R_FAILURE;
+ return ISC_R_SUCCESS;
+}
+
+
+/*
+ * Create session info from PAC
+ * This is called as auth_context->generate_session_info_pac()
+ */
+static NTSTATUS b9_generate_session_info_pac(struct auth4_context *auth_context,
+ TALLOC_CTX *mem_ctx,
+ struct smb_krb5_context *smb_krb5_context,
+ DATA_BLOB *pac_blob,
+ const char *principal_name,
+ const struct tsocket_address *remote_addr,
+ uint32_t session_info_flags,
+ struct auth_session_info **session_info)
+{
+ NTSTATUS status;
+ struct auth_user_info_dc *user_info_dc;
+ TALLOC_CTX *tmp_ctx;
+
+ tmp_ctx = talloc_new(mem_ctx);
+ NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+
+ status = kerberos_pac_blob_to_user_info_dc(tmp_ctx,
+ *pac_blob,
+ smb_krb5_context->krb5_context,
+ &user_info_dc,
+ NULL,
+ NULL);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(tmp_ctx);
+ return status;
}
- return ISC_R_SUCCESS;
+ if (user_info_dc->info->authenticated) {
+ session_info_flags |= AUTH_SESSION_INFO_AUTHENTICATED;
+ }
+
+ session_info_flags |= AUTH_SESSION_INFO_SIMPLE_PRIVILEGES;
+
+ status = auth_generate_session_info(mem_ctx, NULL, NULL, user_info_dc,
+ session_info_flags, session_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(tmp_ctx);
+ return status;
+ }
+
+ talloc_free(tmp_ctx);
+ return status;
+}
+
+/* Callback for the DEBUG() system, to catch the remaining messages */
+static void b9_debug(void *private_ptr, int msg_level, const char *msg)
+{
+ static const int isc_log_map[] = {
+ ISC_LOG_CRITICAL, /* 0 */
+ ISC_LOG_ERROR, /* 1 */
+ ISC_LOG_WARNING, /* 2 */
+ ISC_LOG_NOTICE /* 3 */
+ };
+ struct dlz_bind9_data *state = private_ptr;
+ int isc_log_level;
+
+ if (msg_level >= ARRAY_SIZE(isc_log_map) || msg_level < 0) {
+ isc_log_level = ISC_LOG_INFO;
+ } else {
+ isc_log_level = isc_log_map[msg_level];
+ }
+ state->log(isc_log_level, "samba_dlz: %s", msg);
}
+static int dlz_state_debug_unregister(struct dlz_bind9_data *state)
+{
+ /* Stop logging (to the bind9 logs) */
+ debug_set_callback(NULL, NULL);
+ return 0;
+}
/*
called to initialise the driver
*/
_PUBLIC_ isc_result_t dlz_create(const char *dlzname,
- unsigned int argc, char *argv[],
- void *driverarg, void **dbdata, ...)
+ unsigned int argc, const char **argv,
+ void **dbdata, ...)
{
struct dlz_bind9_data *state;
const char *helper_name;
va_list ap;
isc_result_t result;
- TALLOC_CTX *tmp_ctx;
- int ret;
struct ldb_dn *dn;
- struct b9_options options;
+ NTSTATUS nt_status;
- ZERO_STRUCT(options);
+ if (dlz_bind9_state != NULL) {
+ *dbdata = dlz_bind9_state;
+ dlz_bind9_state_ref_count++;
+ return ISC_R_SUCCESS;
+ }
state = talloc_zero(NULL, struct dlz_bind9_data);
if (state == NULL) {
return ISC_R_NOMEMORY;
}
- tmp_ctx = talloc_new(state);
+ talloc_set_destructor(state, dlz_state_debug_unregister);
/* fill in the helper functions */
va_start(ap, dbdata);
}
va_end(ap);
+ /* Do not install samba signal handlers */
+ fault_setup_disable();
+
+ /* Start logging (to the bind9 logs) */
+ debug_set_callback(state, b9_debug);
+
state->ev_ctx = s4_event_context_init(state);
if (state->ev_ctx == NULL) {
result = ISC_R_NOMEMORY;
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;
- goto failed;
- }
-
- result = parse_options(state, argc, argv, &options);
+ result = parse_options(state, argc, argv, &state->options);
if (result != ISC_R_SUCCESS) {
goto failed;
}
goto failed;
}
- if (options.url == NULL) {
- options.url = talloc_asprintf(tmp_ctx, "ldapi://%s",
- private_path(tmp_ctx, state->lp, "ldap_priv/ldapi"));
- if (options.url == NULL) {
- result = ISC_R_NOMEMORY;
- goto failed;
- }
+ if (state->options.debug) {
+ lpcfg_do_global_parameter(state->lp, "log level", state->options.debug);
+ } else {
+ lpcfg_do_global_parameter(state->lp, "log level", "0");
}
- ret = ldb_connect(state->samdb, options.url, 0, NULL);
- if (ret == -1) {
- state->log(ISC_LOG_ERROR, "samba dlz_bind9: Failed to connect to %s - %s",
- options.url, ldb_errstring(state->samdb));
- result = ISC_R_FAILURE;
+ if (smb_krb5_init_context(state, state->lp, &state->smb_krb5_ctx) != 0) {
+ result = ISC_R_NOMEMORY;
goto failed;
}
- ret = ldb_modules_hook(state->samdb, LDB_MODULE_HOOK_CMDLINE_POSTCONNECT);
- if (ret != LDB_SUCCESS) {
- state->log(ISC_LOG_ERROR, "samba dlz_bind9: Failed postconnect for %s - %s",
- options.url, ldb_errstring(state->samdb));
+ nt_status = gensec_init();
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ result = ISC_R_NOMEMORY;
+ goto failed;
+ }
+
+ state->auth_context = talloc_zero(state, struct auth4_context);
+ if (state->auth_context == NULL) {
+ result = ISC_R_NOMEMORY;
+ goto failed;
+ }
+
+ 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;
+ }
+ }
+
+ 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",
- options.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));
+ state->auth_context->event_ctx = state->ev_ctx;
+ state->auth_context->lp_ctx = state->lp;
+ state->auth_context->sam_ctx = state->samdb;
+ state->auth_context->generate_session_info_pac = b9_generate_session_info_pac;
+
*dbdata = state;
+ dlz_bind9_state = state;
+ dlz_bind9_state_ref_count++;
- talloc_free(tmp_ctx);
return ISC_R_SUCCESS;
failed:
/*
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");
- talloc_free(state);
-}
-
+ state->log(ISC_LOG_INFO, "samba_dlz: shutting down");
-/*
- see if we handle a given zone
- */
-_PUBLIC_ isc_result_t dlz_findzonedb(void *driverarg, void *dbdata, const char *name)
-{
- 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;
+ dlz_bind9_state_ref_count--;
+ if (dlz_bind9_state_ref_count == 0) {
+ talloc_unlink(state, state->samdb);
+ talloc_free(state);
+ dlz_bind9_state = NULL;
}
- return ISC_R_NOTFOUND;
}
/*
- lookup one record
+ return the base DN for a zone
*/
-static 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 b9_find_zone_dn(struct dlz_bind9_data *state, const char *zone_name,
+ TALLOC_CTX *mem_ctx, struct ldb_dn **zone_dn)
{
- struct ldb_dn *dn;
+ int ret;
TALLOC_CTX *tmp_ctx = talloc_new(state);
- const char *attrs[] = { "dnsRecord", NULL };
- int ret, i;
- struct ldb_result *res;
- struct ldb_message_element *el;
-
- dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
- if (dn == NULL) {
- talloc_free(tmp_ctx);
- return ISC_R_NOMEMORY;
- }
+ const char *attrs[] = { NULL };
+ int i;
- 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;
- }
-
- ret = ldb_search(state->samdb, tmp_ctx, &res, dn, LDB_SCOPE_BASE,
- attrs, "objectClass=dnsNode");
- if (ret != LDB_SUCCESS) {
- talloc_free(tmp_ctx);
- return ISC_R_NOTFOUND;
- }
+ for (i=0; zone_prefixes[i]; i++) {
+ struct ldb_dn *dn;
+ struct ldb_result *res;
- 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;
- }
-
- for (i=0; i<el->num_values; i++) {
- struct dnsp_DnssrvRpcRecord rec;
- enum ndr_err_code ndr_err;
- isc_result_t result;
+ dn = ldb_dn_copy(tmp_ctx, ldb_get_default_basedn(state->samdb));
+ if (dn == NULL) {
+ talloc_free(tmp_ctx);
+ return ISC_R_NOMEMORY;
+ }
- 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",
- ldb_dn_get_linearized(dn));
+ if (!ldb_dn_add_child_fmt(dn, "DC=%s,%s", zone_name, zone_prefixes[i])) {
talloc_free(tmp_ctx);
- return ISC_R_FAILURE;
+ return ISC_R_NOMEMORY;
}
- result = b9_putrr(state, lookup, &rec, types);
- if (result != ISC_R_SUCCESS) {
+ 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 result;
+ return ISC_R_SUCCESS;
}
+ talloc_free(dn);
}
talloc_free(tmp_ctx);
- return ISC_R_SUCCESS;
+ return ISC_R_NOTFOUND;
}
+
/*
- lookup one record
+ return the DN for a name. The record does not need to exist, but the
+ zone must exist
*/
-_PUBLIC_ isc_result_t dlz_lookup(const char *zone, const char *name, void *driverarg,
- void *dbdata, dns_sdlzlookup_t *lookup)
+static isc_result_t b9_find_name_dn(struct dlz_bind9_data *state, const char *name,
+ TALLOC_CTX *mem_ctx, struct ldb_dn **dn)
{
- struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
- return dlz_lookup_types(state, zone, name, driverarg, lookup, NULL);
+ 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 a zone transfer is allowed
+ see if we handle a given zone
*/
-_PUBLIC_ isc_result_t dlz_allowzonexfr(void *driverarg, void *dbdata, const char *name,
- const char *client)
+#if DLZ_DLOPEN_VERSION < 3
+_PUBLIC_ isc_result_t dlz_findzonedb(void *dbdata, const char *name)
+#else
+_PUBLIC_ isc_result_t dlz_findzonedb(void *dbdata, const char *name,
+ dns_clientinfomethods_t *methods,
+ dns_clientinfo_t *clientinfo)
+#endif
{
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;
+ return b9_find_zone_dn(state, name, NULL, NULL);
}
+
/*
- perform a zone transfer
+ lookup one record
*/
-_PUBLIC_ isc_result_t dlz_allnodes(const char *zone, void *driverarg, void *dbdata,
- dns_sdlzallnodes_t *allnodes)
+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)
+{
+ TALLOC_CTX *tmp_ctx = talloc_new(state);
+ struct ldb_dn *dn;
+ WERROR werr = WERR_DNS_ERROR_NAME_DOES_NOT_EXIST;
+ struct dnsp_DnssrvRpcRecord *records = NULL;
+ uint16_t num_records = 0, i;
+
+ 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,%s", name, zone, zone_prefixes[i])) {
+ talloc_free(tmp_ctx);
+ return ISC_R_NOMEMORY;
+ }
+
+ werr = dns_common_lookup(state->samdb, tmp_ctx, dn,
+ &records, &num_records, NULL);
+ if (W_ERROR_IS_OK(werr)) {
+ break;
+ }
+ }
+ if (!W_ERROR_IS_OK(werr)) {
+ talloc_free(tmp_ctx);
+ return ISC_R_NOTFOUND;
+ }
+
+ for (i=0; i < num_records; i++) {
+ isc_result_t result;
+
+ result = b9_putrr(state, lookup, &records[i], types);
+ if (result != ISC_R_SUCCESS) {
+ talloc_free(tmp_ctx);
+ return result;
+ }
+ }
+
+ talloc_free(tmp_ctx);
+ return ISC_R_SUCCESS;
+}
+
+/*
+ lookup one record
+ */
+#if DLZ_DLOPEN_VERSION == 1
+_PUBLIC_ isc_result_t dlz_lookup(const char *zone, const char *name,
+ void *dbdata, dns_sdlzlookup_t *lookup)
+#else
+_PUBLIC_ isc_result_t dlz_lookup(const char *zone, const char *name,
+ void *dbdata, dns_sdlzlookup_t *lookup,
+ dns_clientinfomethods_t *methods,
+ dns_clientinfo_t *clientinfo)
+#endif
+{
+ struct dlz_bind9_data *state = talloc_get_type_abort(dbdata, struct dlz_bind9_data);
+ return dlz_lookup_types(state, zone, name, lookup, NULL);
+}
+
+
+/*
+ see if a zone transfer is allowed
+ */
+_PUBLIC_ isc_result_t dlz_allowzonexfr(void *dbdata, const char *name, const char *client)
+{
+ /* just say yes for all our zones for now */
+ struct dlz_bind9_data *state = talloc_get_type(
+ dbdata, struct dlz_bind9_data);
+ return b9_find_zone_dn(state, name, NULL, NULL);
+}
+
+/*
+ perform a zone transfer
+ */
+_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;
TALLOC_CTX *el_ctx = talloc_new(tmp_ctx);
const char *rdn, *name;
const struct ldb_val *v;
+ WERROR werr;
+ struct dnsp_DnssrvRpcRecord *recs = NULL;
+ uint16_t num_recs = 0;
el = ldb_msg_find_element(res->msgs[i], "dnsRecord");
if (el == NULL || el->num_values == 0) {
} else {
name = talloc_asprintf(el_ctx, "%s.%s", rdn, zone);
}
+ name = b9_format_fqdn(el_ctx, name);
if (name == NULL) {
talloc_free(tmp_ctx);
return ISC_R_NOMEMORY;
}
- for (j=0; j<el->num_values; j++) {
- struct dnsp_DnssrvRpcRecord rec;
- enum ndr_err_code ndr_err;
+ werr = dns_common_extract(el, el_ctx, &recs, &num_recs);
+ if (!W_ERROR_IS_OK(werr)) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s, %s",
+ ldb_dn_get_linearized(dn), win_errstr(werr));
+ talloc_free(el_ctx);
+ continue;
+ }
+
+ for (j=0; j < num_recs; j++) {
isc_result_t result;
- 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",
- ldb_dn_get_linearized(dn));
- talloc_free(el_ctx);
+ result = b9_putnamedrr(state, allnodes, name, &recs[j]);
+ if (result != ISC_R_SUCCESS) {
continue;
}
+ }
- result = b9_putnamedrr(state, allnodes, name, &rec);
- if (result != ISC_R_SUCCESS) {
- talloc_free(el_ctx);
+ talloc_free(el_ctx);
+ }
+
+ talloc_free(tmp_ctx);
+
+ 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)
+{
+ TALLOC_CTX *tmp_ctx = talloc_new(state);
+ WERROR werr;
+ struct dnsp_DnssrvRpcRecord *records = NULL;
+ uint16_t num_records = 0, i;
+
+ if (!ldb_dn_add_child_fmt(dn, "DC=@,DC=%s", zone)) {
+ talloc_free(tmp_ctx);
+ return false;
+ }
+
+ werr = dns_common_lookup(state->samdb, tmp_ctx, dn,
+ &records, &num_records, NULL);
+ if (!W_ERROR_IS_OK(werr)) {
+ talloc_free(tmp_ctx);
+ return false;
+ }
+
+ for (i=0; i < num_records; i++) {
+ if (records[i].wType == DNS_TYPE_SOA) {
+ talloc_free(tmp_ctx);
+ return true;
+ }
+ }
+
+ talloc_free(tmp_ctx);
+ return false;
+}
+
+static bool b9_zone_add(struct dlz_bind9_data *state, const char *name)
+{
+ struct b9_zone *zone;
+
+ zone = talloc_zero(state, struct b9_zone);
+ if (zone == NULL) {
+ return false;
+ }
+
+ zone->name = talloc_strdup(zone, name);
+ if (zone->name == NULL) {
+ talloc_free(zone);
+ return false;
+ }
+
+ DLIST_ADD(state->zonelist, zone);
+ return true;
+}
+
+static bool b9_zone_exists(struct dlz_bind9_data *state, const char *name)
+{
+ struct b9_zone *zone = state->zonelist;
+ bool found = false;
+
+ while (zone != NULL) {
+ if (strcasecmp(name, zone->name) == 0) {
+ found = true;
+ break;
+ }
+ zone = zone->next;
+ }
+
+ return found;
+}
+
+
+/*
+ configure a writeable zone
+ */
+#if DLZ_DLOPEN_VERSION < 3
+_PUBLIC_ isc_result_t dlz_configure(dns_view_t *view, void *dbdata)
+#else
+_PUBLIC_ isc_result_t dlz_configure(dns_view_t *view, dns_dlzdb_t *dlzdb,
+ void *dbdata)
+#endif
+{
+ 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;
+ }
+ /* Ignore zones that are not handled in BIND */
+ if ((strcmp(zone, "RootDNSServers") == 0) ||
+ (strcmp(zone, "..TrustAnchors") == 0)) {
+ 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;
}
+
+ if (b9_zone_exists(state, zone)) {
+ state->log(ISC_LOG_WARNING, "samba_dlz: Ignoring duplicate zone '%s' from '%s'",
+ zone, ldb_dn_get_linearized(zone_dn));
+ continue;
+ }
+
+ if (!b9_zone_add(state, zone)) {
+ talloc_free(tmp_ctx);
+ return ISC_R_NOMEMORY;
+ }
+
+#if DLZ_DLOPEN_VERSION < 3
+ result = state->writeable_zone(view, zone);
+#else
+ result = state->writeable_zone(view, dlzdb, zone);
+#endif
+ 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;
+}
+
+/*
+ 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;
+ int 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 ISC_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 ISC_FALSE;
+ }
+
+ cli_credentials_set_krb5_context(server_credentials, state->smb_krb5_ctx);
+ cli_credentials_set_conf(server_credentials, state->lp);
+
+ 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);
+ if (ret != 0) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to obtain server credentials from %s",
+ keytab_name);
+ talloc_free(tmp_ctx);
+ return ISC_FALSE;
+ }
+ talloc_free(keytab_name);
+
+ nt_status = gensec_server_start(tmp_ctx,
+ lpcfg_gensec_settings(tmp_ctx, state->lp),
+ state->auth_context, &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 ISC_FALSE;
+ }
+
+ gensec_set_credentials(gensec_ctx, server_credentials);
+
+ 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 ISC_FALSE;
+ }
+
+ nt_status = gensec_update_ev(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 ISC_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 ISC_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 ISC_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 ISC_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 ISC_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 ISC_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 ISC_TRUE;
+}
+
+/*
+ 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)
+{
+ bool status;
+ int i;
+ struct in6_addr rec1_in_addr6;
+ struct in6_addr rec2_in_addr6;
+
+ 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: {
+ int ret;
+
+ ret = inet_pton(AF_INET6, rec1->data.ipv6, &rec1_in_addr6);
+ if (ret != 1) {
+ return false;
+ }
+ ret = inet_pton(AF_INET6, rec2->data.ipv6, &rec2_in_addr6);
+ if (ret != 1) {
+ return false;
+ }
+
+ return memcmp(&rec1_in_addr6, &rec2_in_addr6, sizeof(rec1_in_addr6)) == 0;
+ }
+ case DNS_TYPE_CNAME:
+ return dns_name_equal(rec1->data.cname, rec2->data.cname);
+ case DNS_TYPE_TXT:
+ status = (rec1->data.txt.count == rec2->data.txt.count);
+ if (!status) return status;
+ for (i=0; i<rec1->data.txt.count; i++) {
+ status &= (strcmp(rec1->data.txt.str[i], rec2->data.txt.str[i]) == 0);
+ }
+ return status;
+ case DNS_TYPE_PTR:
+ return dns_name_equal(rec1->data.ptr, rec2->data.ptr);
+ 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_dlz b9_record_match: 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're 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;
+ bool tombstoned = false;
+ bool needs_add = false;
+ struct dnsp_DnssrvRpcRecord *recs = NULL;
+ uint16_t num_recs = 0;
+ uint16_t first = 0;
+ uint16_t i;
+ NTTIME t;
+ WERROR werr;
+
+ 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->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 */
+ werr = dns_common_lookup(state->samdb, rec, dn,
+ &recs, &num_recs, &tombstoned);
+ if (W_ERROR_EQUAL(werr, WERR_DNS_ERROR_NAME_DOES_NOT_EXIST)) {
+ needs_add = true;
+ werr = WERR_OK;
+ }
+ if (!W_ERROR_IS_OK(werr)) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to parse dnsRecord for %s, %s",
+ ldb_dn_get_linearized(dn), win_errstr(werr));
+ talloc_free(rec);
+ return ISC_R_FAILURE;
+ }
+
+ if (tombstoned) {
+ /*
+ * we need to keep the existing tombstone record
+ * and ignore it
+ */
+ first = num_recs;
+ }
+
+ /* there are existing records. We need to see if this will
+ * replace a record or add to it
+ */
+ for (i=first; i < num_recs; i++) {
+ if (b9_record_match(state, rec, &recs[i])) {
+ break;
+ }
+ }
+ if (i == UINT16_MAX) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to already %u dnsRecord values for %s",
+ i, ldb_dn_get_linearized(dn));
+ talloc_free(rec);
+ return ISC_R_FAILURE;
+ }
+
+ if (i == num_recs) {
+ /* adding a new value */
+ recs = talloc_realloc(rec, recs,
+ struct dnsp_DnssrvRpcRecord,
+ num_recs + 1);
+ if (recs == NULL) {
+ talloc_free(rec);
+ return ISC_R_NOMEMORY;
+ }
+ num_recs++;
+ }
+
+ recs[i] = *rec;
+
+ if (!b9_set_session_info(state, name)) {
+ talloc_free(rec);
+ return ISC_R_FAILURE;
+ }
+
+ /* modify the record */
+ werr = dns_common_replace(state->samdb, rec, dn,
+ needs_add,
+ state->soa_serial,
+ recs, num_recs);
+ b9_reset_session_info(state);
+ if (!W_ERROR_IS_OK(werr)) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to %s %s - %s",
+ needs_add ? "add" : "modify",
+ ldb_dn_get_linearized(dn), win_errstr(werr));
+ 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 dnsp_DnssrvRpcRecord *recs = NULL;
+ uint16_t num_recs = 0;
+ uint16_t i;
+ WERROR werr;
+
+ if (state->transaction_token != (void*)version) {
+ state->log(ISC_LOG_ERROR, "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_ERROR, "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 */
+ werr = dns_common_lookup(state->samdb, rec, dn,
+ &recs, &num_recs, NULL);
+ if (!W_ERROR_IS_OK(werr)) {
+ talloc_free(rec);
+ return ISC_R_NOTFOUND;
+ }
+
+ for (i=0; i < num_recs; i++) {
+ if (b9_record_match(state, rec, &recs[i])) {
+ recs[i] = (struct dnsp_DnssrvRpcRecord) {
+ .wType = DNS_TYPE_TOMBSTONE,
+ };
+ break;
+ }
+ }
+ if (i == num_recs) {
+ talloc_free(rec);
+ return ISC_R_NOTFOUND;
+ }
+
+ if (!b9_set_session_info(state, name)) {
+ talloc_free(rec);
+ return ISC_R_FAILURE;
+ }
+
+ /* modify the record */
+ werr = dns_common_replace(state->samdb, rec, dn,
+ false,/* needs_add */
+ state->soa_serial,
+ recs, num_recs);
+ b9_reset_session_info(state);
+ if (!W_ERROR_IS_OK(werr)) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to modify %s - %s",
+ ldb_dn_get_linearized(dn), win_errstr(werr));
+ 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;
+ enum dns_record_type dns_type;
+ bool found = false;
+ struct dnsp_DnssrvRpcRecord *recs = NULL;
+ uint16_t num_recs = 0;
+ uint16_t ri = 0;
+ WERROR werr;
+
+ if (state->transaction_token != (void*)version) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: bad transaction version");
+ return ISC_R_FAILURE;
+ }
+
+ if (!b9_dns_type(type, &dns_type)) {
+ state->log(ISC_LOG_ERROR, "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 */
+ werr = dns_common_lookup(state->samdb, tmp_ctx, dn,
+ &recs, &num_recs, NULL);
+ if (!W_ERROR_IS_OK(werr)) {
+ talloc_free(tmp_ctx);
+ return ISC_R_NOTFOUND;
+ }
+
+ for (ri=0; ri < num_recs; ri++) {
+ if (dns_type != recs[ri].wType) {
+ continue;
+ }
+
+ found = true;
+ recs[ri] = (struct dnsp_DnssrvRpcRecord) {
+ .wType = DNS_TYPE_TOMBSTONE,
+ };
+ }
+
+ 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;
+ }
+
+ /* modify the record */
+ werr = dns_common_replace(state->samdb, tmp_ctx, dn,
+ false,/* needs_add */
+ state->soa_serial,
+ recs, num_recs);
+ b9_reset_session_info(state);
+ if (!W_ERROR_IS_OK(werr)) {
+ state->log(ISC_LOG_ERROR, "samba_dlz: failed to modify %s - %s",
+ ldb_dn_get_linearized(dn), win_errstr(werr));
+ 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