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authorAndrew Tridgell <tridge@samba.org>2010-09-14 20:10:51 +1000
committerAndrew Tridgell <tridge@samba.org>2010-09-15 15:39:36 +1000
commit59d415f43f72146b15a721e928cf346777239bfc (patch)
treee6bd1c56d75e328256bdb0f2e67795fee52c1c08 /source4/libcli
parent99f514f233fb1b3dcdd19cd2cc9ca9130ea841c8 (diff)
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s4-finddc: use NBT lookup for a 1C name if joining a short domain name
once we get the 1C lookup reply, use a CLDAP query to find the details for the server Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>
Diffstat (limited to 'source4/libcli')
-rw-r--r--source4/libcli/finddc.h2
-rw-r--r--source4/libcli/finddcs_cldap.c111
2 files changed, 99 insertions, 14 deletions
diff --git a/source4/libcli/finddc.h b/source4/libcli/finddc.h
index 9e6e2dfe83..3f1caf9ce5 100644
--- a/source4/libcli/finddc.h
+++ b/source4/libcli/finddc.h
@@ -23,7 +23,7 @@
struct finddcs {
struct {
- const char *dns_domain_name;
+ const char *domain_name;
const char *site_name; /* optional */
struct dom_sid *domain_sid; /* optional */
uint32_t minimum_dc_flags; /* DS_SERVER_* */
diff --git a/source4/libcli/finddcs_cldap.c b/source4/libcli/finddcs_cldap.c
index 4d721f9d6e..949002bd51 100644
--- a/source4/libcli/finddcs_cldap.c
+++ b/source4/libcli/finddcs_cldap.c
@@ -34,7 +34,7 @@
struct finddcs_cldap_state {
struct tevent_context *ev;
struct tevent_req *req;
- const char *dns_domain_name;
+ const char *domain_name;
struct dom_sid *domain_sid;
const char **srv_addresses;
uint32_t minimum_dc_flags;
@@ -45,6 +45,15 @@ struct finddcs_cldap_state {
static void finddcs_cldap_srv_resolved(struct composite_context *ctx);
static void finddcs_cldap_netlogon_replied(struct tevent_req *req);
+static bool finddcs_cldap_srv_lookup(struct finddcs_cldap_state *state,
+ struct finddcs *io,
+ struct resolve_context *resolve_ctx,
+ struct tevent_context *event_ctx);
+static bool finddcs_cldap_nbt_lookup(struct finddcs_cldap_state *state,
+ struct finddcs *io,
+ struct resolve_context *resolve_ctx,
+ struct tevent_context *event_ctx);
+static void finddcs_cldap_name_resolved(struct composite_context *ctx);
/*
@@ -58,9 +67,6 @@ struct tevent_req *finddcs_cldap_send(TALLOC_CTX *mem_ctx,
{
struct finddcs_cldap_state *state;
struct tevent_req *req;
- const char *srv_name;
- struct composite_context *creq;
- struct nbt_name name;
req = tevent_req_create(mem_ctx, &state, struct finddcs_cldap_state);
if (req == NULL) {
@@ -70,8 +76,8 @@ struct tevent_req *finddcs_cldap_send(TALLOC_CTX *mem_ctx,
state->req = req;
state->ev = event_ctx;
state->minimum_dc_flags = io->in.minimum_dc_flags;
- state->dns_domain_name = talloc_strdup(state, io->in.dns_domain_name);
- if (tevent_req_nomem(state->dns_domain_name, req)) {
+ state->domain_name = talloc_strdup(state, io->in.domain_name);
+ if (tevent_req_nomem(state->domain_name, req)) {
return tevent_req_post(req, event_ctx);
}
@@ -84,12 +90,37 @@ struct tevent_req *finddcs_cldap_send(TALLOC_CTX *mem_ctx,
state->domain_sid = NULL;
}
- /* step1: lookup _ldap._tcp.* */
+ if (strchr(state->domain_name, '.')) {
+ /* looks like a DNS name */
+ if (!finddcs_cldap_srv_lookup(state, io, resolve_ctx, event_ctx)) {
+ return tevent_req_post(req, event_ctx);
+ }
+ } else {
+ if (!finddcs_cldap_nbt_lookup(state, io, resolve_ctx, event_ctx)) {
+ return tevent_req_post(req, event_ctx);
+ }
+ }
+
+ return req;
+}
+
+/*
+ start a SRV DNS lookup
+ */
+static bool finddcs_cldap_srv_lookup(struct finddcs_cldap_state *state,
+ struct finddcs *io,
+ struct resolve_context *resolve_ctx,
+ struct tevent_context *event_ctx)
+{
+ const char *srv_name;
+ struct composite_context *creq;
+ struct nbt_name name;
+
if (io->in.site_name) {
srv_name = talloc_asprintf(state, "_ldap._tcp.%s._sites.%s",
- io->in.site_name, io->in.dns_domain_name);
+ io->in.site_name, io->in.domain_name);
} else {
- srv_name = talloc_asprintf(state, "_ldap._tcp.%s", io->in.dns_domain_name);
+ srv_name = talloc_asprintf(state, "_ldap._tcp.%s", io->in.domain_name);
}
make_nbt_name(&name, srv_name, 0);
@@ -97,15 +128,35 @@ struct tevent_req *finddcs_cldap_send(TALLOC_CTX *mem_ctx,
creq = resolve_name_ex_send(resolve_ctx, state,
RESOLVE_NAME_FLAG_FORCE_DNS | RESOLVE_NAME_FLAG_DNS_SRV,
0, &name, event_ctx);
- if (tevent_req_nomem(creq, req)) {
- return tevent_req_post(req, event_ctx);
+ if (tevent_req_nomem(creq, state->req)) {
+ return false;
}
creq->async.fn = finddcs_cldap_srv_resolved;
creq->async.private_data = state;
- return req;
+ return true;
}
+/*
+ start a NBT name lookup for domain<1C>
+ */
+static bool finddcs_cldap_nbt_lookup(struct finddcs_cldap_state *state,
+ struct finddcs *io,
+ struct resolve_context *resolve_ctx,
+ struct tevent_context *event_ctx)
+{
+ struct composite_context *creq;
+ struct nbt_name name;
+
+ make_nbt_name(&name, state->domain_name, NBT_NAME_LOGON);
+ creq = resolve_name_send(resolve_ctx, state, &name, event_ctx);
+ if (tevent_req_nomem(creq, state->req)) {
+ return false;
+ }
+ creq->async.fn = finddcs_cldap_name_resolved;
+ creq->async.private_data = state;
+ return true;
+}
/*
fire off a CLDAP query to the next server
@@ -127,7 +178,9 @@ static void finddcs_cldap_next_server(struct finddcs_cldap_state *state)
state->netlogon->in.dest_address = state->srv_addresses[state->srv_address_index];
/* we should get the port from the SRV response */
state->netlogon->in.dest_port = 389;
- state->netlogon->in.realm = state->dns_domain_name;
+ if (strchr(state->domain_name, '.')) {
+ state->netlogon->in.realm = state->domain_name;
+ }
if (state->domain_sid) {
state->netlogon->in.domain_sid = dom_sid_string(state, state->domain_sid);
if (tevent_req_nomem(state->netlogon->in.domain_sid, state->req)) {
@@ -181,6 +234,38 @@ static void finddcs_cldap_netlogon_replied(struct tevent_req *subreq)
tevent_req_done(state->req);
}
+/*
+ handle NBT name lookup reply
+ */
+static void finddcs_cldap_name_resolved(struct composite_context *ctx)
+{
+ struct finddcs_cldap_state *state =
+ talloc_get_type(ctx->async.private_data, struct finddcs_cldap_state);
+ const char *address;
+ NTSTATUS status;
+
+ status = resolve_name_recv(ctx, state, &address);
+ if (tevent_req_nterror(state->req, status)) {
+ return;
+ }
+
+ state->srv_addresses = talloc_array(state, const char *, 2);
+ if (tevent_req_nomem(state->srv_addresses, state->req)) {
+ return;
+ }
+ state->srv_addresses[0] = address;
+ state->srv_addresses[1] = NULL;
+
+ state->srv_address_index = 0;
+
+ status = cldap_socket_init(state, state->ev, NULL, NULL, &state->cldap);
+ if (tevent_req_nterror(state->req, status)) {
+ return;
+ }
+
+ finddcs_cldap_next_server(state);
+}
+
/*
* Having got a DNS SRV answer, fire off the first CLDAP request