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-rw-r--r--source4/librpc/rpc/dcerpc_util.c149
1 files changed, 149 insertions, 0 deletions
diff --git a/source4/librpc/rpc/dcerpc_util.c b/source4/librpc/rpc/dcerpc_util.c
new file mode 100644
index 0000000000..75799c1a0b
--- /dev/null
+++ b/source4/librpc/rpc/dcerpc_util.c
@@ -0,0 +1,149 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ dcerpc utility functions
+
+ Copyright (C) Andrew Tridgell 2003
+
+ 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"
+
+/*
+ this ndr_size_* stuff should really be auto-generated ....
+*/
+
+static size_t ndr_size_epm_floor(struct epm_floor *fl)
+{
+ size_t ret = 5;
+ if (fl->lhs.protocol == EPM_PROTOCOL_UUID) {
+ ret += 18;
+ } else {
+ ret += fl->lhs.info.lhs_data.length;
+ }
+ ret += fl->rhs.rhs_data.length;
+ return ret;
+}
+
+size_t ndr_size_epm_towers(struct epm_towers *towers)
+{
+ size_t ret = 2;
+ int i;
+ for (i=0;i<towers->num_floors;i++) {
+ ret += ndr_size_epm_floor(&towers->floors[i]);
+ }
+ return ret;
+}
+
+/*
+ work out what TCP port to use for a given interface on a given host
+*/
+NTSTATUS dcerpc_epm_map_tcp_port(const char *server,
+ const char *uuid, unsigned version,
+ uint32 *port)
+{
+ struct dcerpc_pipe *p;
+ NTSTATUS status;
+ struct epm_Map r;
+ struct policy_handle handle;
+ GUID guid;
+ struct epm_twr_t twr, *twr_r;
+
+ status = dcerpc_pipe_open_tcp(&p, server, 135);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ /* we can use the pipes memory context here as we will have a short
+ lived connection */
+ status = dcerpc_bind_byuuid(p, p->mem_ctx,
+ DCERPC_EPMAPPER_UUID,
+ DCERPC_EPMAPPER_VERSION);
+ if (!NT_STATUS_IS_OK(status)) {
+ dcerpc_pipe_close(p);
+ return status;
+ }
+
+ ZERO_STRUCT(handle);
+ ZERO_STRUCT(guid);
+
+ twr.towers.num_floors = 5;
+ twr.towers.floors = talloc(p->mem_ctx, sizeof(twr.towers.floors[0]) * 5);
+
+ /* what I'd like for christmas ... */
+
+ /* an RPC interface ... */
+ twr.towers.floors[0].lhs.protocol = EPM_PROTOCOL_UUID;
+ GUID_from_string(uuid, &twr.towers.floors[0].lhs.info.uuid.uuid);
+ twr.towers.floors[0].lhs.info.uuid.version = version;
+ twr.towers.floors[0].rhs.rhs_data = data_blob_talloc(p->mem_ctx, NULL, 2);
+
+ /* encoded with NDR ... */
+ twr.towers.floors[1].lhs.protocol = EPM_PROTOCOL_UUID;
+ GUID_from_string(NDR_GUID, &twr.towers.floors[1].lhs.info.uuid.uuid);
+ twr.towers.floors[1].lhs.info.uuid.version = 2;
+ twr.towers.floors[1].rhs.rhs_data = data_blob_talloc(p->mem_ctx, NULL, 2);
+
+ /* on an RPC connection ... */
+ twr.towers.floors[2].lhs.protocol = EPM_PROTOCOL_RPC_C;
+ twr.towers.floors[2].lhs.info.lhs_data = data_blob(NULL, 0);
+ twr.towers.floors[2].rhs.rhs_data = data_blob_talloc(p->mem_ctx, NULL, 2);
+
+ /* on a TCP port ... */
+ twr.towers.floors[3].lhs.protocol = EPM_PROTOCOL_TCP;
+ twr.towers.floors[3].lhs.info.lhs_data = data_blob(NULL, 0);
+ twr.towers.floors[3].rhs.rhs_data = data_blob_talloc(p->mem_ctx, NULL, 2);
+
+ /* on an IP link ... */
+ twr.towers.floors[4].lhs.protocol = EPM_PROTOCOL_IP;
+ twr.towers.floors[4].lhs.info.lhs_data = data_blob(NULL, 0);
+ twr.towers.floors[4].rhs.rhs_data = data_blob_talloc(p->mem_ctx, NULL, 4);
+
+ r.in.object = &guid;
+ r.in.map_tower = &twr;
+ r.in.entry_handle = &handle;
+ r.in.max_towers = 1;
+ r.out.entry_handle = &handle;
+
+ status = dcerpc_epm_Map(p, p->mem_ctx, &r);
+ if (!NT_STATUS_IS_OK(status)) {
+ dcerpc_pipe_close(p);
+ return status;
+ }
+ if (r.out.status != 0 || r.out.num_towers != 1) {
+ dcerpc_pipe_close(p);
+ return NT_STATUS_PORT_UNREACHABLE;
+ }
+
+ twr_r = r.out.towers[0].twr;
+ if (!twr_r) {
+ dcerpc_pipe_close(p);
+ return NT_STATUS_PORT_UNREACHABLE;
+ }
+
+ if (twr_r->towers.num_floors != 5 ||
+ twr_r->towers.floors[3].lhs.protocol != EPM_PROTOCOL_TCP ||
+ twr_r->towers.floors[3].rhs.rhs_data.length != 2) {
+ dcerpc_pipe_close(p);
+ return NT_STATUS_PORT_UNREACHABLE;
+ }
+
+ *port = RSVAL(twr_r->towers.floors[3].rhs.rhs_data.data, 0);
+
+ dcerpc_pipe_close(p);
+
+ return NT_STATUS_OK;
+}