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/*
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;
if (strcasecmp(uuid, DCERPC_EPMAPPER_UUID) == 0 ||
strcasecmp(uuid, DCERPC_MGMT_UUID) == 0) {
/* don't lookup epmapper via epmapper! */
*port = EPMAPPER_PORT;
return NT_STATUS_OK;
}
status = dcerpc_pipe_open_tcp(&p, server, EPMAPPER_PORT);
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_zero(p->mem_ctx, 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 = NDR_GUID_VERSION;
twr.towers.floors[1].rhs.rhs_data = data_blob_talloc_zero(p->mem_ctx, 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_zero(p->mem_ctx, 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_zero(p->mem_ctx, 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_zero(p->mem_ctx, 4);
/* with some nice pretty paper around it of course */
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 != twr.towers.floors[3].lhs.protocol ||
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;
}
/*
find the pipe name for a local IDL interface
*/
const char *idl_pipe_name(const char *uuid, uint32 if_version)
{
int i;
for (i=0;dcerpc_pipes[i];i++) {
if (strcasecmp(dcerpc_pipes[i]->uuid, uuid) == 0 &&
dcerpc_pipes[i]->if_version == if_version) {
return dcerpc_pipes[i]->name;
}
}
return "UNKNOWN";
}
/*
find the number of calls defined by local IDL
*/
int idl_num_calls(const char *uuid, uint32 if_version)
{
int i;
for (i=0;dcerpc_pipes[i];i++) {
if (strcasecmp(dcerpc_pipes[i]->uuid, uuid) == 0 &&
dcerpc_pipes[i]->if_version == if_version) {
return dcerpc_pipes[i]->num_calls;
}
}
return -1;
}
/*
find a dcerpc interface by name
*/
const struct dcerpc_interface_table *idl_iface_by_name(const char *name)
{
int i;
for (i=0;dcerpc_pipes[i];i++) {
if (strcasecmp(dcerpc_pipes[i]->name, name) == 0) {
return dcerpc_pipes[i];
}
}
return NULL;
}
/*
push a dcerpc_packet into a blob, potentially with auth info
*/
NTSTATUS dcerpc_push_auth(DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
struct dcerpc_packet *pkt,
struct dcerpc_auth *auth_info)
{
NTSTATUS status;
struct ndr_push *ndr;
ndr = ndr_push_init_ctx(mem_ctx);
if (!ndr) {
return NT_STATUS_NO_MEMORY;
}
if (auth_info) {
pkt->auth_length = auth_info->credentials.length;
} else {
pkt->auth_length = 0;
}
status = ndr_push_dcerpc_packet(ndr, NDR_SCALARS|NDR_BUFFERS, pkt);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
if (auth_info) {
status = ndr_push_dcerpc_auth(ndr, NDR_SCALARS|NDR_BUFFERS, auth_info);
}
*blob = ndr_push_blob(ndr);
/* fill in the frag length */
SSVAL(blob->data, DCERPC_FRAG_LEN_OFFSET, blob->length);
return NT_STATUS_OK;
}
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