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authorAndrew Tridgell <tridge@samba.org>2010-09-27 21:08:43 -0700
committerAndrew Tridgell <tridge@samba.org>2010-09-27 22:55:05 -0700
commit0bbbfa04f60b173912cedcfe08590fe43b5c2872 (patch)
treecf4fc9cec7aa95cfe0f34f8d04ccb875436f16fe
parentc4d2b6fbc21625dc5ed2063e5ad699309fa5a3e1 (diff)
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s4-dns: implemented RODC DNS update in dns update task
Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>
-rw-r--r--source4/dsdb/dns/dns_update.c199
1 files changed, 199 insertions, 0 deletions
diff --git a/source4/dsdb/dns/dns_update.c b/source4/dsdb/dns/dns_update.c
index e9f93038b6..fbfca192ba 100644
--- a/source4/dsdb/dns/dns_update.c
+++ b/source4/dsdb/dns/dns_update.c
@@ -36,6 +36,8 @@
#include "param/param.h"
#include "system/filesys.h"
#include "libcli/composite/composite.h"
+#include "libcli/security/dom_sid.h"
+#include "librpc/gen_ndr/ndr_irpc.h"
struct dnsupdate_service {
struct task_server *task;
@@ -347,6 +349,200 @@ static NTSTATUS dnsupdate_nameupdate_schedule(struct dnsupdate_service *service)
return NT_STATUS_OK;
}
+
+struct dnsupdate_RODC_state {
+ struct irpc_message *msg;
+ struct dnsupdate_RODC *r;
+ char *tmp_path;
+ int fd;
+};
+
+static int dnsupdate_RODC_destructor(struct dnsupdate_RODC_state *st)
+{
+ if (st->fd != -1) {
+ close(st->fd);
+ }
+ unlink(st->tmp_path);
+ return 0;
+}
+
+/*
+ called when the DNS update has completed
+ */
+static void dnsupdate_RODC_callback(struct tevent_req *req)
+{
+ struct dnsupdate_RODC_state *st =
+ tevent_req_callback_data(req,
+ struct dnsupdate_RODC_state);
+ int sys_errno;
+ int i, ret;
+
+ ret = samba_runcmd_recv(req, &sys_errno);
+ talloc_free(req);
+ if (ret != 0) {
+ st->r->out.result = map_nt_error_from_unix(sys_errno);
+ DEBUG(2,(__location__ ": RODC DNS Update failed: %s\n", nt_errstr(st->r->out.result)));
+ } else {
+ st->r->out.result = NT_STATUS_OK;
+ DEBUG(3,(__location__ ": RODC DNS Update OK\n"));
+ }
+
+ for (i=0; i<st->r->in.dns_names->count; i++) {
+ st->r->out.dns_names->names[i].status = NT_STATUS_V(st->r->out.result);
+ }
+
+ irpc_send_reply(st->msg, NT_STATUS_OK);
+}
+
+
+/**
+ * Called when we get a RODC DNS update request from the netlogon
+ * rpc server
+ */
+static NTSTATUS dnsupdate_dnsupdate_RODC(struct irpc_message *msg,
+ struct dnsupdate_RODC *r)
+{
+ struct dnsupdate_service *s = talloc_get_type(msg->private_data,
+ struct dnsupdate_service);
+ const char * const *dns_update_command = lpcfg_dns_update_command(s->task->lp_ctx);
+ struct dnsupdate_RODC_state *st;
+ struct tevent_req *req;
+ int i, ret;
+ struct GUID ntds_guid;
+ const char *site, *dnsdomain, *dnsforest, *ntdsguid, *hostname;
+ struct ldb_dn *sid_dn;
+ const char *attrs[] = { "dNSHostName", NULL };
+ struct ldb_result *res;
+
+ st = talloc_zero(msg, struct dnsupdate_RODC_state);
+ if (!st) {
+ r->out.result = NT_STATUS_NO_MEMORY;
+ return NT_STATUS_OK;
+ }
+
+ st->r = r;
+ st->msg = msg;
+
+ st->tmp_path = smbd_tmp_path(st, s->task->lp_ctx, "rodcdns.XXXXXX");
+ if (!st->tmp_path) {
+ talloc_free(st);
+ r->out.result = NT_STATUS_NO_MEMORY;
+ return NT_STATUS_OK;
+ }
+
+ st->fd = mkstemp(st->tmp_path);
+ if (st->fd == -1) {
+ DEBUG(0,("Unable to create a temporary file for RODC dnsupdate\n"));
+ talloc_free(st);
+ r->out.result = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ return NT_STATUS_OK;
+ }
+
+ talloc_set_destructor(st, dnsupdate_RODC_destructor);
+
+ sid_dn = ldb_dn_new_fmt(st, s->samdb, "<SID=%s>", dom_sid_string(st, r->in.dom_sid));
+ if (!sid_dn) {
+ talloc_free(st);
+ r->out.result = NT_STATUS_NO_MEMORY;
+ return NT_STATUS_OK;
+ }
+
+ /* work out the site */
+ ret = samdb_find_site_for_computer(s->samdb, st, sid_dn, &site);
+ if (ret != LDB_SUCCESS) {
+ DEBUG(2, (__location__ ": Unable to find site for computer %s\n",
+ ldb_dn_get_linearized(sid_dn)));
+ talloc_free(st);
+ r->out.result = NT_STATUS_NO_SUCH_USER;
+ return NT_STATUS_OK;
+ }
+
+ /* work out the ntdsguid */
+ ret = samdb_find_ntdsguid_for_computer(s->samdb, sid_dn, &ntds_guid);
+ ntdsguid = GUID_string(st, &ntds_guid);
+ if (ret != LDB_SUCCESS || !ntdsguid) {
+ DEBUG(2, (__location__ ": Unable to find NTDS GUID for computer %s\n",
+ ldb_dn_get_linearized(sid_dn)));
+ talloc_free(st);
+ r->out.result = NT_STATUS_NO_SUCH_USER;
+ return NT_STATUS_OK;
+ }
+
+
+ /* find dnsdomain and dnsforest */
+ dnsdomain = lpcfg_realm(s->task->lp_ctx);
+ dnsforest = dnsdomain;
+
+ /* find the hostname */
+ ret = dsdb_search_dn(s->samdb, st, &res, sid_dn, attrs, 0);
+ if (ret == LDB_SUCCESS) {
+ hostname = ldb_msg_find_attr_as_string(res->msgs[0], "dNSHostName", NULL);
+ }
+ if (ret != LDB_SUCCESS || !hostname) {
+ DEBUG(2, (__location__ ": Unable to find NTDS GUID for computer %s\n",
+ ldb_dn_get_linearized(sid_dn)));
+ talloc_free(st);
+ r->out.result = NT_STATUS_NO_SUCH_USER;
+ return NT_STATUS_OK;
+ }
+
+
+ for (i=0; i<st->r->in.dns_names->count; i++) {
+ struct NL_DNS_NAME_INFO *n = &r->in.dns_names->names[i];
+ switch (n->type) {
+ case NlDnsLdapAtSite:
+ dprintf(st->fd, "SRV _ldap._tcp.%s._sites.%s. %s %u\n",
+ site, dnsdomain, hostname, n->port);
+ break;
+ case NlDnsGcAtSite:
+ dprintf(st->fd, "SRV _ldap._tcp.%s._sites.gc._msdcs.%s. %s %u\n",
+ site, dnsdomain, hostname, n->port);
+ break;
+ case NlDnsDsaCname:
+ dprintf(st->fd, "CNAME %s._msdcs.%s. %s\n",
+ ntdsguid, dnsforest, hostname);
+ break;
+ case NlDnsKdcAtSite:
+ dprintf(st->fd, "SRV _kerberos._tcp.%s._sites.dc._msdcs.%s. %s %u\n",
+ site, dnsdomain, hostname, n->port);
+ break;
+ case NlDnsDcAtSite:
+ dprintf(st->fd, "SRV _ldap._tcp.%s._sites.dc._msdcs.%s. %s %u\n",
+ site, dnsdomain, hostname, n->port);
+ break;
+ case NlDnsRfc1510KdcAtSite:
+ dprintf(st->fd, "SRV _kerberos._tcp.%s._sites.%s. %s %u\n",
+ site, dnsdomain, hostname, n->port);
+ break;
+ case NlDnsGenericGcAtSite:
+ dprintf(st->fd, "SRV _gc._tcp.%s._sites.%s. %s %u\n",
+ site, dnsforest, hostname, n->port);
+ break;
+ }
+ }
+
+ close(st->fd);
+ st->fd = -1;
+
+ DEBUG(3,("Calling RODC DNS name update script %s\n", st->tmp_path));
+ req = samba_runcmd_send(st,
+ s->task->event_ctx,
+ timeval_current_ofs(20, 0),
+ 2, 0,
+ dns_update_command,
+ "--update-list",
+ st->tmp_path,
+ NULL);
+ NT_STATUS_HAVE_NO_MEMORY(req);
+
+ /* setup the callback */
+ tevent_req_set_callback(req, dnsupdate_RODC_callback, st);
+
+ msg->defer_reply = true;
+
+ return NT_STATUS_OK;
+}
+
/*
startup the dns update task
*/
@@ -412,6 +608,9 @@ static void dnsupdate_task_init(struct task_server *task)
irpc_add_name(task->msg_ctx, "dnsupdate");
+ IRPC_REGISTER(task->msg_ctx, irpc, DNSUPDATE_RODC,
+ dnsupdate_dnsupdate_RODC, service);
+
/* create the intial file */
dnsupdate_rebuild(service);