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authorAndrew Tridgell <tridge@samba.org>2010-02-17 21:15:08 +1100
committerStefan Metzmacher <metze@samba.org>2010-02-23 13:48:20 +0100
commit61af327e5d2bb97909f349fbc918d6981aa1f196 (patch)
tree66fd437fc05d9338282d3e225822c84f23da36c4 /source4
parentae209d488ec00b0527057331f84b7d0d99305b4c (diff)
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s4-dns: call out to the dns update command every 10 minutes
This periodically calls samba_dnsupdate to update our DNS entries if needed
Diffstat (limited to 'source4')
-rw-r--r--source4/dsdb/dns/dns_update.c138
1 files changed, 112 insertions, 26 deletions
diff --git a/source4/dsdb/dns/dns_update.c b/source4/dsdb/dns/dns_update.c
index efaea168e2..9252ffbe4b 100644
--- a/source4/dsdb/dns/dns_update.c
+++ b/source4/dsdb/dns/dns_update.c
@@ -23,6 +23,9 @@
/*
this module auto-creates the named.conf.update file, which tells
bind9 what KRB5 principals it should accept for updates to our zone
+
+ It also uses the samba_dnsupdate script to auto-create the right DNS
+ names for ourselves as a DC in the domain, using TSIG-GSS
*/
#include "includes.h"
@@ -39,12 +42,21 @@ struct dnsupdate_service {
struct auth_session_info *system_session_info;
struct ldb_context *samdb;
+ /* status for periodic config file update */
+ struct {
+ uint32_t interval;
+ struct tevent_timer *te;
+ struct composite_context *c;
+ NTSTATUS status;
+ } confupdate;
+
+ /* status for periodic DNS name check */
struct {
uint32_t interval;
struct tevent_timer *te;
struct composite_context *c;
NTSTATUS status;
- } periodic;
+ } nameupdate;
};
/*
@@ -54,18 +66,18 @@ static void dnsupdate_rndc_done(struct composite_context *c)
{
struct dnsupdate_service *service = talloc_get_type_abort(c->async.private_data,
struct dnsupdate_service);
- service->periodic.status = composite_wait(c);
- if (!NT_STATUS_IS_OK(service->periodic.status)) {
+ service->confupdate.status = composite_wait(c);
+ if (!NT_STATUS_IS_OK(service->confupdate.status)) {
DEBUG(0,(__location__ ": Failed rndc update - %s\n",
- nt_errstr(service->periodic.status)));
+ nt_errstr(service->confupdate.status)));
return;
}
talloc_free(c);
- service->periodic.c = NULL;
+ service->confupdate.c = NULL;
}
/*
- called every dnsupdate:interval seconds
+ called every 'dnsupdate:conf interval' seconds
*/
static void dnsupdate_rebuild(struct dnsupdate_service *service)
{
@@ -122,12 +134,12 @@ static void dnsupdate_rebuild(struct dnsupdate_service *service)
dprintf(fd, "};\n");
close(fd);
- if (service->periodic.c != NULL) {
- talloc_free(service->periodic.c);
- service->periodic.c = NULL;
+ if (service->confupdate.c != NULL) {
+ talloc_free(service->confupdate.c);
+ service->confupdate.c = NULL;
}
- if (NT_STATUS_IS_OK(service->periodic.status) &&
+ if (NT_STATUS_IS_OK(service->confupdate.status) &&
file_compare(tmp_path, path) == true) {
unlink(tmp_path);
talloc_free(tmp_ctx);
@@ -142,38 +154,101 @@ static void dnsupdate_rebuild(struct dnsupdate_service *service)
}
DEBUG(2,("Loading new DNS update grant rules\n"));
- service->periodic.c = samba_runcmd(service->task->event_ctx, service,
+ service->confupdate.c = samba_runcmd(service->task->event_ctx, service,
timeval_current_ofs(10, 0),
2, 0,
lp_rndc_command(service->task->lp_ctx),
"reload", NULL);
- service->periodic.c->async.fn = dnsupdate_rndc_done;
- service->periodic.c->async.private_data = service;
+ service->confupdate.c->async.fn = dnsupdate_rndc_done;
+ service->confupdate.c->async.private_data = service;
talloc_free(tmp_ctx);
}
-static NTSTATUS dnsupdate_periodic_schedule(struct dnsupdate_service *service);
+static NTSTATUS dnsupdate_confupdate_schedule(struct dnsupdate_service *service);
/*
- called every dnsupdate:interval seconds
+ called every 'dnsupdate:conf interval' seconds
*/
-static void dnsupdate_periodic_handler_te(struct tevent_context *ev, struct tevent_timer *te,
+static void dnsupdate_confupdate_handler_te(struct tevent_context *ev, struct tevent_timer *te,
struct timeval t, void *ptr)
{
struct dnsupdate_service *service = talloc_get_type(ptr, struct dnsupdate_service);
dnsupdate_rebuild(service);
- dnsupdate_periodic_schedule(service);
+ dnsupdate_confupdate_schedule(service);
}
-static NTSTATUS dnsupdate_periodic_schedule(struct dnsupdate_service *service)
+static NTSTATUS dnsupdate_confupdate_schedule(struct dnsupdate_service *service)
{
- service->periodic.te = tevent_add_timer(service->task->event_ctx, service,
- timeval_current_ofs(service->periodic.interval, 0),
- dnsupdate_periodic_handler_te, service);
- NT_STATUS_HAVE_NO_MEMORY(service->periodic.te);
+ service->confupdate.te = tevent_add_timer(service->task->event_ctx, service,
+ timeval_current_ofs(service->confupdate.interval, 0),
+ dnsupdate_confupdate_handler_te, service);
+ NT_STATUS_HAVE_NO_MEMORY(service->confupdate.te);
+ return NT_STATUS_OK;
+}
+
+
+/*
+ called when dns update script has finished
+ */
+static void dnsupdate_nameupdate_done(struct composite_context *c)
+{
+ struct dnsupdate_service *service = talloc_get_type_abort(c->async.private_data,
+ struct dnsupdate_service);
+ service->nameupdate.status = composite_wait(c);
+ if (!NT_STATUS_IS_OK(service->nameupdate.status)) {
+ DEBUG(0,(__location__ ": Failed DNS update - %s\n",
+ nt_errstr(service->nameupdate.status)));
+ return;
+ }
+ talloc_free(c);
+ service->nameupdate.c = NULL;
+}
+
+/*
+ called every 'dnsupdate:name interval' seconds
+ */
+static void dnsupdate_check_names(struct dnsupdate_service *service)
+{
+ /* kill any existing child */
+ if (service->nameupdate.c != NULL) {
+ talloc_free(service->nameupdate.c);
+ service->nameupdate.c = NULL;
+ }
+
+ DEBUG(3,("Calling DNS name update script\n"));
+ service->nameupdate.c = samba_runcmd(service->task->event_ctx, service,
+ timeval_current_ofs(10, 0),
+ 2, 0,
+ lp_dns_update_command(service->task->lp_ctx),
+ NULL);
+ service->nameupdate.c->async.fn = dnsupdate_nameupdate_done;
+ service->nameupdate.c->async.private_data = service;
+}
+
+static NTSTATUS dnsupdate_nameupdate_schedule(struct dnsupdate_service *service);
+
+/*
+ called every 'dnsupdate:name interval' seconds
+ */
+static void dnsupdate_nameupdate_handler_te(struct tevent_context *ev, struct tevent_timer *te,
+ struct timeval t, void *ptr)
+{
+ struct dnsupdate_service *service = talloc_get_type(ptr, struct dnsupdate_service);
+
+ dnsupdate_check_names(service);
+ dnsupdate_nameupdate_schedule(service);
+}
+
+
+static NTSTATUS dnsupdate_nameupdate_schedule(struct dnsupdate_service *service)
+{
+ service->nameupdate.te = tevent_add_timer(service->task->event_ctx, service,
+ timeval_current_ofs(service->nameupdate.interval, 0),
+ dnsupdate_nameupdate_handler_te, service);
+ NT_STATUS_HAVE_NO_MEMORY(service->nameupdate.te);
return NT_STATUS_OK;
}
@@ -216,13 +291,24 @@ static void dnsupdate_task_init(struct task_server *task)
return;
}
- service->periodic.interval = lp_parm_int(task->lp_ctx, NULL,
- "dnsupdate", "interval", 60); /* in seconds */
+ service->confupdate.interval = lp_parm_int(task->lp_ctx, NULL,
+ "dnsupdate", "config interval", 60); /* in seconds */
+
+ service->nameupdate.interval = lp_parm_int(task->lp_ctx, NULL,
+ "dnsupdate", "name interval", 600); /* in seconds */
+
+ status = dnsupdate_confupdate_schedule(service);
+ if (!NT_STATUS_IS_OK(status)) {
+ task_server_terminate(task, talloc_asprintf(task,
+ "dnsupdate: Failed to confupdate schedule: %s\n",
+ nt_errstr(status)), true);
+ return;
+ }
- status = dnsupdate_periodic_schedule(service);
+ status = dnsupdate_nameupdate_schedule(service);
if (!NT_STATUS_IS_OK(status)) {
task_server_terminate(task, talloc_asprintf(task,
- "dnsupdate: Failed to periodic schedule: %s\n",
+ "dnsupdate: Failed to nameupdate schedule: %s\n",
nt_errstr(status)), true);
return;
}