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authorAndrew Tridgell <tridge@samba.org>2005-01-31 04:15:58 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 13:09:24 -0500
commitaa985bdee09e222f9f3f1f49e1cc20e0760c6f32 (patch)
tree06a1196ade27f619759e53e23fb3fbe9c83121d0 /source4/nbt_server
parent5e6082b4b0e8d47d8634cf1b0c5bb460d0b6dbd1 (diff)
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r5118: added support for node status replies in nbtd. nmblookup -S now works against Samba4.
Also added support for the '*' wildcard name (This used to be commit 2dd7ccf72444db668fa970c3a95de1448baea224)
Diffstat (limited to 'source4/nbt_server')
-rw-r--r--source4/nbt_server/config.mk1
-rw-r--r--source4/nbt_server/nbt_server.h7
-rw-r--r--source4/nbt_server/nodestatus.c124
-rw-r--r--source4/nbt_server/query.c16
-rw-r--r--source4/nbt_server/register.c14
5 files changed, 148 insertions, 14 deletions
diff --git a/source4/nbt_server/config.mk b/source4/nbt_server/config.mk
index e3f52a64e6..2501c01417 100644
--- a/source4/nbt_server/config.mk
+++ b/source4/nbt_server/config.mk
@@ -9,6 +9,7 @@ ADD_OBJ_FILES = \
nbt_server/interfaces.o \
nbt_server/register.o \
nbt_server/query.o \
+ nbt_server/nodestatus.o \
nbt_server/winsserver.o \
nbt_server/packet.o
REQUIRED_SUBSYSTEMS = \
diff --git a/source4/nbt_server/nbt_server.h b/source4/nbt_server/nbt_server.h
index 49a07ca95e..602d7b2e46 100644
--- a/source4/nbt_server/nbt_server.h
+++ b/source4/nbt_server/nbt_server.h
@@ -62,3 +62,10 @@ struct nbt_server {
+/* check a condition on an incoming packet */
+#define NBT_ASSERT_PACKET(packet, src_address, test) do { \
+ if (!(test)) { \
+ nbt_bad_packet(packet, src_address, #test); \
+ return; \
+ } \
+} while (0)
diff --git a/source4/nbt_server/nodestatus.c b/source4/nbt_server/nodestatus.c
new file mode 100644
index 0000000000..f57c86d10f
--- /dev/null
+++ b/source4/nbt_server/nodestatus.c
@@ -0,0 +1,124 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ answer node status queries
+
+ Copyright (C) Andrew Tridgell 2005
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "dlinklist.h"
+#include "system/network.h"
+#include "nbt_server/nbt_server.h"
+
+/*
+ send a name status reply
+*/
+static void nbt_node_status_reply(struct nbt_name_socket *nbtsock,
+ struct nbt_name_packet *request_packet,
+ const char *src_address, int src_port,
+ struct nbt_name *name,
+ struct nbt_interface *iface)
+{
+ struct nbt_name_packet *packet;
+ uint32_t name_count;
+ struct nbt_iface_name *iname;
+
+ /* work out how many names to send */
+ name_count = 0;
+ for (iname=iface->names;iname;iname=iname->next) {
+ if ((iname->nb_flags & NBT_NM_ACTIVE) &&
+ strcmp(iname->name.name, "*") != 0) {
+ name_count++;
+ }
+ }
+
+ packet = talloc_zero(nbtsock, struct nbt_name_packet);
+ if (packet == NULL) return;
+
+ packet->name_trn_id = request_packet->name_trn_id;
+ packet->ancount = 1;
+ packet->operation = NBT_OPCODE_QUERY | NBT_FLAG_REPLY | NBT_FLAG_AUTHORITIVE;
+
+ packet->answers = talloc_array(packet, struct nbt_res_rec, 1);
+ if (packet->answers == NULL) goto failed;
+
+ packet->answers[0].name = *name;
+ packet->answers[0].rr_type = NBT_QTYPE_STATUS;
+ packet->answers[0].rr_class = NBT_QCLASS_IP;
+ packet->answers[0].ttl = 0;
+ packet->answers[0].rdata.status.num_names = name_count;
+ packet->answers[0].rdata.status.names = talloc_array(packet->answers,
+ struct nbt_status_name, name_count);
+ if (packet->answers[0].rdata.status.names == NULL) goto failed;
+
+ name_count = 0;
+ for (iname=iface->names;iname;iname=iname->next) {
+ if ((iname->nb_flags & NBT_NM_ACTIVE) &&
+ strcmp(iname->name.name, "*") != 0) {
+ struct nbt_status_name *n = &packet->answers[0].rdata.status.names[name_count];
+ n->name = talloc_asprintf(packet->answers, "%-15s", iname->name.name);
+ if (n->name == NULL) goto failed;
+ n->type = iname->name.type;
+ n->nb_flags = iname->nb_flags;
+ name_count++;
+ }
+ }
+ /* we deliberately don't fill in the statistics structure as
+ it could lead to giving attackers too much information */
+ ZERO_STRUCT(packet->answers[0].rdata.status.statistics);
+
+ DEBUG(7,("Sending node status reply for %s<%02x> to %s:%d\n",
+ name->name, name->type, src_address, src_port));
+
+ nbt_name_reply_send(nbtsock, src_address, src_port, packet);
+
+failed:
+ talloc_free(packet);
+}
+
+
+/*
+ answer a node status query
+*/
+void nbt_query_status(struct nbt_name_socket *nbtsock,
+ struct nbt_name_packet *packet,
+ const char *src_address, int src_port)
+{
+ struct nbt_interface *iface;
+ struct nbt_name *name;
+ struct nbt_iface_name *iname;
+
+ /* find the interface for this query */
+ iface = nbt_iface_find(nbtsock, src_address);
+
+ NBT_ASSERT_PACKET(packet, src_address, packet->qdcount == 1);
+ NBT_ASSERT_PACKET(packet, src_address, packet->questions[0].question_type == NBT_QTYPE_STATUS);
+ NBT_ASSERT_PACKET(packet, src_address, packet->questions[0].question_class == NBT_QCLASS_IP);
+
+ /* see if we have the requested name on this interface */
+ name = &packet->questions[0].name;
+
+ iname = nbt_find_iname(iface, name, NBT_NM_ACTIVE);
+ if (iname == NULL) {
+ DEBUG(7,("Node status query for %s<%02x> from %s - not found on %s\n",
+ name->name, name->type, src_address, iface->ip_address));
+ return;
+ }
+
+ nbt_node_status_reply(nbtsock, packet, src_address, src_port, &iname->name, iface);
+}
diff --git a/source4/nbt_server/query.c b/source4/nbt_server/query.c
index c962a691c6..859a9c7f26 100644
--- a/source4/nbt_server/query.c
+++ b/source4/nbt_server/query.c
@@ -25,15 +25,6 @@
#include "system/network.h"
#include "nbt_server/nbt_server.h"
-/* check a condition on an incoming packet */
-#define NBT_ASSERT_PACKET(packet, src_address, test) do { \
- if (!(test)) { \
- nbt_bad_packet(packet, src_address, #test); \
- return; \
- } \
-} while (0)
-
-
/*
send a name query reply
*/
@@ -92,6 +83,13 @@ void nbt_request_query(struct nbt_name_socket *nbtsock,
struct nbt_iface_name *iname;
struct nbt_name *name;
+ /* see if its a node status query */
+ if (packet->qdcount == 1 &&
+ packet->questions[0].question_type == NBT_QTYPE_STATUS) {
+ nbt_query_status(nbtsock, packet, src_address, src_port);
+ return;
+ }
+
/* if its a WINS query then direct to our WINS server */
if ((packet->operation & NBT_FLAG_RECURSION_DESIRED) &&
!(packet->operation & NBT_FLAG_BROADCAST)) {
diff --git a/source4/nbt_server/register.c b/source4/nbt_server/register.c
index 7f7c291cf0..e5033f4f5e 100644
--- a/source4/nbt_server/register.c
+++ b/source4/nbt_server/register.c
@@ -88,7 +88,7 @@ static void nbt_register_name_iface(struct nbt_interface *iface,
iname->ttl = lp_parm_int(-1, "nbtd", "bcast_ttl", 300000);
iname->registration_time = timeval_zero();
- DLIST_ADD(iface->names, iname);
+ DLIST_ADD_END(iface->names, iname, struct nbt_iface_name *);
if (nb_flags & NBT_NM_PERMANENT) {
/* permanent names are not announced and are immediately active */
@@ -145,8 +145,12 @@ void nbt_register_names(struct nbt_server *nbtsrv)
nbt_register_name(nbtsrv, lp_netbios_name(), NBT_NAME_CLIENT, nb_flags);
nbt_register_name(nbtsrv, lp_netbios_name(), NBT_NAME_USER, nb_flags);
nbt_register_name(nbtsrv, lp_netbios_name(), NBT_NAME_SERVER, nb_flags);
- nbt_register_name(nbtsrv, lp_workgroup(), NBT_NAME_CLIENT, nb_flags | NBT_NM_GROUP);
- nbt_register_name(nbtsrv, lp_workgroup(), NBT_NAME_SERVER, nb_flags | NBT_NM_GROUP);
- nbt_register_name(nbtsrv, "__SAMBA__", NBT_NAME_CLIENT, nb_flags | NBT_NM_PERMANENT);
- nbt_register_name(nbtsrv, "__SAMBA__", NBT_NAME_SERVER, nb_flags | NBT_NM_PERMANENT);
+
+ nb_flags |= NBT_NM_GROUP;
+ nbt_register_name(nbtsrv, lp_workgroup(), NBT_NAME_CLIENT, nb_flags);
+
+ nb_flags |= NBT_NM_PERMANENT;
+ nbt_register_name(nbtsrv, "__SAMBA__", NBT_NAME_CLIENT, nb_flags);
+ nbt_register_name(nbtsrv, "__SAMBA__", NBT_NAME_SERVER, nb_flags);
+ nbt_register_name(nbtsrv, "*", NBT_NAME_CLIENT, nb_flags);
}