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s4-dns: add all forest DCs to named.conf.update

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this allows all DCs to update DNS entries
This commit is contained in:
Andrew Tridgell 2011-09-30 07:43:54 +10:00
parent 7244e254cc
commit e9758ef94d
1 changed files with 54 additions and 12 deletions
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66
source4/dsdb/dns/dns_update.c
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@ -35,6 +35,7 @@
#include "lib/messaging/irpc.h"
#include "param/param.h"
#include "system/filesys.h"
#include "dsdb/common/util.h"
#include "libcli/composite/composite.h"
#include "libcli/security/dom_sid.h"
#include "librpc/gen_ndr/ndr_irpc.h"
@ -99,28 +100,73 @@ static void dnsupdate_rebuild(struct dnsupdate_service *service)
{
int ret;
size_t size;
struct ldb_result *res;
struct ldb_result *res1, *res2;
const char *tmp_path, *path, *path_static;
char *static_policies;
int fd;
unsigned int i;
const char *attrs[] = { "sAMAccountName", NULL };
const char *attrs1[] = { "msDS-HasDomainNCs", NULL };
const char *attrs2[] = { "name", NULL };
const char *realm = lpcfg_realm(service->task->lp_ctx);
TALLOC_CTX *tmp_ctx = talloc_new(service);
const char * const *rndc_command = lpcfg_rndc_command(service->task->lp_ctx);
const char **dc_list;
int dc_count=0;
/* abort any pending script run */
TALLOC_FREE(service->confupdate.subreq);
ret = ldb_search(service->samdb, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
attrs, "(|(samaccountname=administrator)(&(primaryGroupID=%u)(objectClass=computer)))",
DOMAIN_RID_DCS);
/* find the DNs for all the non-RODC DCs in the forest */
ret = dsdb_search(service->samdb, tmp_ctx, &res1, ldb_get_config_basedn(service->samdb),
LDB_SCOPE_SUBTREE,
attrs1,
0,
"(&(objectclass=NTDSDSA)(!(msDS-isRODC=TRUE)))");
if (ret != LDB_SUCCESS) {
DEBUG(0,(__location__ ": Unable to find DCs list - %s", ldb_errstring(service->samdb)));
talloc_free(tmp_ctx);
return;
}
dc_list = talloc_array(tmp_ctx, const char *, 0);
for (i=0; i<res1->count; i++) {
struct ldb_dn *server_dn = res1->msgs[i]->dn;
struct ldb_dn *domain_dn;
const char *acct_name, *full_account, *dns_domain;
/* this is a nasty hack to form the account name of
* this DC. We do it this way as we don't necessarily
* have access to the domain NC, so all we have to go
* on is what is in the configuration partition
*/
domain_dn = ldb_msg_find_attr_as_dn(service->samdb, tmp_ctx, res1->msgs[i], "msDS-HasDomainNCs");
if (domain_dn == NULL) continue;
ldb_dn_remove_child_components(server_dn, 1);
ret = dsdb_search_dn(service->samdb, tmp_ctx, &res2, server_dn, attrs2, 0);
if (ret != LDB_SUCCESS) {
continue;
}
acct_name = ldb_msg_find_attr_as_string(res2->msgs[0], "name", NULL);
if (acct_name == NULL) continue;
dns_domain = samdb_dn_to_dns_domain(tmp_ctx, domain_dn);
if (dns_domain == NULL) {
continue;
}
full_account = talloc_asprintf(tmp_ctx, "%s$@%s", acct_name, dns_domain);
if (full_account == NULL) continue;
dc_list = talloc_realloc(tmp_ctx, dc_list, const char *, dc_count+1);
if (dc_list == NULL) {
continue;
}
dc_list[dc_count++] = full_account;
}
path = lpcfg_parm_string(service->task->lp_ctx, NULL, "dnsupdate", "path");
if (path == NULL) {
path = lpcfg_private_path(tmp_ctx, service->task->lp_ctx, "named.conf.update");
@ -156,14 +202,10 @@ static void dnsupdate_rebuild(struct dnsupdate_service *service)
dprintf(fd, "/* End of static entries */\n");
}
dprintf(fd, "\tgrant %s ms-self * A AAAA;\n", realm);
dprintf(fd, "\tgrant Administrator@%s wildcard * A AAAA SRV CNAME;\n", realm);
for (i=0; i<res->count; i++) {
const char *acctname;
acctname = ldb_msg_find_attr_as_string(res->msgs[i],
"sAMAccountName", NULL);
if (!acctname) continue;
dprintf(fd, "\tgrant %s@%s wildcard * A AAAA SRV CNAME;\n",
acctname, realm);
for (i=0; i<dc_count; i++) {
dprintf(fd, "\tgrant %s wildcard * A AAAA SRV CNAME;\n", dc_list[i]);
}
dprintf(fd, "};\n");
close(fd);