ComputerSurge/bind9
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support the "version" config file option

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This commit is contained in:
Andreas Gustafsson
1999-12-08 21:27:08 +00:00
parent 6cefa82d9a
commit 9bd232838e
1 changed files with 107 additions and 90 deletions
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197
bin/named/server.c
View File

@@ -70,7 +70,6 @@ typedef struct {
} ns_load_t;
static isc_task_t * server_task;
static dns_view_t * version_view;
static isc_result_t
@@ -144,6 +143,106 @@ create_default_view(isc_mem_t *mctx, dns_rdataclass_t rdclass,
return (result);
}
/*
* Create the special view that handles queries for
* "version.bind. CH". The version string returned is that
* configured in 'configctx', or a compiled-in default if
* there is no "version" configuration option.
*/
static isc_result_t
create_version_view(dns_c_ctx_t *configctx, dns_view_t **viewp) {
dns_result_t result;
dns_db_t *db = NULL;
dns_zone_t *zone = NULL;
dns_dbversion_t *dbver = NULL;
dns_difftuple_t *tuple = NULL;
dns_diff_t diff;
dns_view_t *view = NULL;
dns_name_t *origin;
char *versiontext;
char buf[256];
isc_region_t r;
size_t len;
dns_rdata_t rdata;
REQUIRE(viewp != NULL && *viewp == NULL);
dns_diff_init(ns_g_mctx, &diff);
(void) dns_c_ctx_getversion(configctx, &versiontext);
if (versiontext == NULL)
versiontext = ns_g_version;
len = strlen(versiontext);
if (len > 255)
len = 255; /* Silently truncate. */
buf[0] = len;
memcpy(buf + 1, versiontext, len);
r.base = buf;
r.length = 1 + len;
dns_rdata_fromregion(&rdata, dns_rdataclass_ch, dns_rdatatype_txt, &r);
result = dns_zone_create(&zone, ns_g_mctx);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = dns_zone_setorigin(zone, "version.bind.");
if (result != ISC_R_SUCCESS)
goto cleanup;
origin = dns_zone_getorigin(zone);
result = dns_db_create(ns_g_mctx, "rbt", origin, ISC_FALSE,
dns_rdataclass_ch, 0, NULL, &db);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = dns_db_newversion(db, &dbver);
if (result != DNS_R_SUCCESS)
goto cleanup;
dns_difftuple_create(ns_g_mctx, DNS_DIFFOP_ADD, origin,
0, &rdata, &tuple);
dns_diff_append(&diff, &tuple);
result = dns_diff_apply(&diff, db, dbver);
if (result != DNS_R_SUCCESS)
goto cleanup;
dns_db_closeversion(db, &dbver, ISC_TRUE);
result = dns_view_create(ns_g_mctx, dns_rdataclass_ch, "_version",
&view);
if (result != ISC_R_SUCCESS)
return (result);
result = dns_zone_replacedb(zone, db, ISC_FALSE);
if (result != DNS_R_SUCCESS)
goto cleanup;
result = dns_view_addzone(view, zone);
if (result != DNS_R_SUCCESS)
goto cleanup;
dns_view_freeze(view);
/* Transfer ownership. */
*viewp = view;
view = NULL;
result = ISC_R_SUCCESS;
cleanup:
if (view != NULL)
dns_view_detach(&view);
if (zone != NULL)
dns_zone_detach(&zone);
if (dbver != NULL)
dns_db_closeversion(db, &dbver, ISC_FALSE);
if (db != NULL)
dns_db_detach(&db);
dns_diff_clear(&diff);
return (result);
}
static isc_result_t
load_zone(dns_c_ctx_t *ctx, dns_c_zone_t *czone, dns_c_view_t *cview,
void *uap)
@@ -333,11 +432,15 @@ load_configuration(const char *filename) {
dns_view_freeze(view);
/*
* Attach the version view.
* Create the version view.
*/
view = NULL;
dns_view_attach(version_view, &view);
result = create_version_view(configctx, &view);
if (result != ISC_R_SUCCESS)
ns_server_fatal(NS_LOGMODULE_SERVER, ISC_FALSE,
"could not create version view");
ISC_LIST_APPEND(lctx.viewlist, view, link);
view = NULL;
/*
* Change directory.
@@ -420,7 +523,7 @@ load_configuration(const char *filename) {
static void
run_server(isc_task_t *task, isc_event_t *event) {
(void)task;
isc_event_free(&event);
@@ -433,86 +536,6 @@ run_server(isc_task_t *task, isc_event_t *event) {
ISC_LOG_INFO, "running");
}
static isc_result_t
create_version_view(void) {
dns_view_t *view;
dns_zone_t *zone;
dns_db_t *db;
dns_name_t *origin;
dns_result_t result, eresult;
isc_buffer_t source;
size_t len;
int soacount, nscount;
dns_rdatacallbacks_t callbacks;
char version_text[1024];
(void)sprintf(version_text, "version 0 CHAOS TXT \"%s\"\n",
ns_g_version);
view = NULL;
result = dns_view_create(ns_g_mctx, dns_rdataclass_ch, "_version",
&view);
if (result != ISC_R_SUCCESS)
return (result);
zone = NULL;
result = dns_zone_create(&zone, ns_g_mctx);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = dns_zone_setorigin(zone, "bind.");
if (result != ISC_R_SUCCESS)
goto cleanup;
origin = dns_zone_getorigin(zone);
db = NULL;
result = dns_db_create(ns_g_mctx, "rbt", origin, ISC_FALSE,
view->rdclass, 0, NULL, &db);
if (result != ISC_R_SUCCESS)
goto cleanup;
len = strlen(version_text);
isc_buffer_init(&source, version_text, len, ISC_BUFFERTYPE_TEXT);
isc_buffer_add(&source, len);
dns_rdatacallbacks_init(&callbacks);
result = dns_db_beginload(db, &callbacks.add, &callbacks.add_private);
if (result != DNS_R_SUCCESS)
return (result);
result = dns_master_loadbuffer(&source, &db->origin, &db->origin,
db->rdclass, ISC_FALSE,
&soacount, &nscount, &callbacks,
ns_g_mctx);
eresult = dns_db_endload(db, &callbacks.add_private);
if (result != ISC_R_SUCCESS)
result = eresult;
if (result != ISC_R_SUCCESS)
goto cleanup;
result = dns_zone_replacedb(zone, db, ISC_FALSE);
if (result != DNS_R_SUCCESS)
goto cleanup;
result = dns_view_addzone(view, zone);
if (result != DNS_R_SUCCESS)
goto cleanup;
dns_view_freeze(view);
version_view = view;
view = NULL;
result = ISC_R_SUCCESS;
cleanup:
if (db != NULL)
dns_db_detach(&db);
if (zone != NULL)
dns_zone_detach(&zone);
if (view != NULL)
dns_view_detach(&view);
return (result);
}
static void
shutdown_server(isc_task_t *task, isc_event_t *event) {
dns_view_t *view, *view_next;
@@ -544,8 +567,6 @@ shutdown_server(isc_task_t *task, isc_event_t *event) {
isc_task_detach(&server_task);
dns_view_detach(&version_view);
dns_zonemgr_destroy(&ns_g_zonemgr);
ns_rootns_destroy();
@@ -569,10 +590,6 @@ ns_server_init(void) {
if (result != ISC_R_SUCCESS)
return (result);
result = create_version_view();
if (result != ISC_R_SUCCESS)
return (result);
/*
* Setup the server task, which is responsible for coordinating
* startup and shutdown of the server.