remote dcerpc operations
Copyright (C) Stefan (metze) Metzmacher 2004
-
+ Copyright (C) Julien Kerihuel 2008-2009
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2010
+
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 3 of the License, or
*/
#include "includes.h"
+#include <tevent.h>
#include "rpc_server/dcerpc_server.h"
#include "auth/auth.h"
#include "auth/credentials/credentials.h"
#include "librpc/ndr/ndr_table.h"
#include "param/param.h"
+NTSTATUS dcerpc_server_remote_init(TALLOC_CTX *ctx);
struct dcesrv_remote_private {
struct dcerpc_pipe *c_pipe;
return NT_STATUS_OK;
}
-static NTSTATUS remote_op_bind(struct dcesrv_call_state *dce_call, const struct dcesrv_interface *iface)
+static NTSTATUS remote_op_bind(struct dcesrv_call_state *dce_call, const struct dcesrv_interface *iface, uint32_t if_version)
{
NTSTATUS status;
- const struct ndr_interface_table *table;
- struct dcesrv_remote_private *private;
- const char *binding = lp_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "dcerpc_remote", "binding");
+ const struct ndr_interface_table *table =
+ (const struct ndr_interface_table *)dce_call->context->iface->private_data;
+ struct dcesrv_remote_private *priv;
+ const char *binding = NULL;
const char *user, *pass, *domain;
struct cli_credentials *credentials;
+ bool must_free_credentials = false;
bool machine_account;
+ bool allow_anonymous;
+ struct dcerpc_binding *b;
+ struct composite_context *pipe_conn_req;
+ uint32_t flags = 0;
- machine_account = lp_parm_bool(dce_call->conn->dce_ctx->lp_ctx, NULL, "dcerpc_remote", "use_machine_account", false);
-
- private = talloc(dce_call->conn, struct dcesrv_remote_private);
- if (!private) {
+ priv = talloc(dce_call->conn, struct dcesrv_remote_private);
+ if (!priv) {
return NT_STATUS_NO_MEMORY;
}
- private->c_pipe = NULL;
- dce_call->context->private = private;
-
- if (!binding) {
+ priv->c_pipe = NULL;
+ dce_call->context->private_data = priv;
+
+ binding = lpcfg_parm_string(dce_call->conn->dce_ctx->lp_ctx,
+ NULL,
+ "dcerpc_remote",
+ "binding");
+ if (binding == NULL) {
DEBUG(0,("You must specify a DCE/RPC binding string\n"));
return NT_STATUS_INVALID_PARAMETER;
}
- user = lp_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "dcerpc_remote", "user");
- pass = lp_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "dcerpc_remote", "password");
- domain = lp_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "dceprc_remote", "domain");
+ user = lpcfg_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "dcerpc_remote", "user");
+ pass = lpcfg_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "dcerpc_remote", "password");
+ domain = lpcfg_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "dceprc_remote", "domain");
- table = ndr_table_by_uuid(&iface->syntax_id.uuid); /* FIXME: What about if_version ? */
- if (!table) {
- dce_call->fault_code = DCERPC_FAULT_UNK_IF;
- return NT_STATUS_NET_WRITE_FAULT;
- }
+ machine_account = lpcfg_parm_bool(dce_call->conn->dce_ctx->lp_ctx,
+ NULL,
+ "dcerpc_remote",
+ "use_machine_account",
+ false);
+ allow_anonymous = lpcfg_parm_bool(dce_call->conn->dce_ctx->lp_ctx,
+ NULL,
+ "dcerpc_remote",
+ "allow_anonymous_fallback",
+ false);
+
+ credentials = dcesrv_call_credentials(dce_call);
if (user && pass) {
DEBUG(5, ("dcerpc_remote: RPC Proxy: Using specified account\n"));
- credentials = cli_credentials_init(private);
+ credentials = cli_credentials_init(priv);
if (!credentials) {
return NT_STATUS_NO_MEMORY;
}
+ must_free_credentials = true;
cli_credentials_set_conf(credentials, dce_call->conn->dce_ctx->lp_ctx);
cli_credentials_set_username(credentials, user, CRED_SPECIFIED);
if (domain) {
cli_credentials_set_password(credentials, pass, CRED_SPECIFIED);
} else if (machine_account) {
DEBUG(5, ("dcerpc_remote: RPC Proxy: Using machine account\n"));
- credentials = cli_credentials_init(private);
+ credentials = cli_credentials_init(priv);
+ if (!credentials) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ must_free_credentials = true;
cli_credentials_set_conf(credentials, dce_call->conn->dce_ctx->lp_ctx);
if (domain) {
cli_credentials_set_domain(credentials, domain, CRED_SPECIFIED);
}
- status = cli_credentials_set_machine_account(credentials);
+ status = cli_credentials_set_machine_account(credentials, dce_call->conn->dce_ctx->lp_ctx);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
- } else if (dce_call->conn->auth_state.session_info->credentials) {
+ } else if (credentials != NULL) {
DEBUG(5, ("dcerpc_remote: RPC Proxy: Using delegated credentials\n"));
- credentials = dce_call->conn->auth_state.session_info->credentials;
+ } else if (allow_anonymous) {
+ DEBUG(5, ("dcerpc_remote: RPC Proxy: Using anonymous\n"));
+ credentials = cli_credentials_init_anon(priv);
+ if (!credentials) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ must_free_credentials = true;
} else {
DEBUG(1,("dcerpc_remote: RPC Proxy: You must supply binding, user and password or have delegated credentials\n"));
return NT_STATUS_INVALID_PARAMETER;
}
- status = dcerpc_pipe_connect(private,
- &(private->c_pipe), binding, table,
- credentials, dce_call->event_ctx);
+ /* parse binding string to the structure */
+ status = dcerpc_parse_binding(dce_call->context, binding, &b);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Failed to parse dcerpc binding '%s'\n", binding));
+ return status;
+ }
+
+ /* If we already have a remote association group ID, then use that */
+ if (dce_call->conn->assoc_group->proxied_id != 0) {
+ status = dcerpc_binding_set_assoc_group_id(b,
+ dce_call->conn->assoc_group->proxied_id);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("dcerpc_binding_set_assoc_group_id() - %s'\n",
+ nt_errstr(status)));
+ return status;
+ }
+ }
+
+ status = dcerpc_binding_set_abstract_syntax(b, &table->syntax_id);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("dcerpc_binding_set_abstract_syntax() - %s'\n",
+ nt_errstr(status)));
+ return status;
+ }
+
+ if (dce_call->pkt.pfc_flags & DCERPC_PFC_FLAG_CONC_MPX) {
+ status = dcerpc_binding_set_flags(b, DCERPC_CONCURRENT_MULTIPLEX, 0);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("dcerpc_binding_set_flags(CONC_MPX) - %s'\n",
+ nt_errstr(status)));
+ return status;
+ }
+ }
+
+ DEBUG(3, ("Using binding %s\n", dcerpc_binding_string(dce_call->context, b)));
+
+ pipe_conn_req = dcerpc_pipe_connect_b_send(dce_call->context, b, table,
+ credentials, dce_call->event_ctx, dce_call->conn->dce_ctx->lp_ctx);
+ status = dcerpc_pipe_connect_b_recv(pipe_conn_req, dce_call->context, &(priv->c_pipe));
+
+ if (must_free_credentials) {
+ talloc_free(credentials);
+ }
+
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ flags = dcerpc_binding_get_flags(priv->c_pipe->binding);
+ if (!(flags & DCERPC_CONCURRENT_MULTIPLEX)) {
+ dce_call->state_flags &= ~DCESRV_CALL_STATE_FLAG_MULTIPLEXED;
+ }
+
+ if (dce_call->conn->assoc_group->proxied_id == 0) {
+ dce_call->conn->assoc_group->proxied_id =
+ dcerpc_binding_get_assoc_group_id(priv->c_pipe->binding);
+ }
- talloc_free(credentials);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
return NT_STATUS_OK;
}
-static void remote_op_unbind(struct dcesrv_connection_context *context, const struct dcesrv_interface *iface)
+static NTSTATUS remote_get_private(struct dcesrv_call_state *dce_call,
+ struct dcesrv_remote_private **_priv)
{
- struct dcesrv_remote_private *private = (struct dcesrv_remote_private *)context->private;
+ void *ptr = NULL;
+ struct dcesrv_remote_private *priv = NULL;
- talloc_free(private->c_pipe);
+ ptr = dce_call->context->private_data;
+ priv = talloc_get_type_abort(ptr, struct dcesrv_remote_private);
- return;
+ *_priv = priv;
+ return NT_STATUS_OK;
}
static NTSTATUS remote_op_ndr_pull(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, struct ndr_pull *pull, void **r)
{
enum ndr_err_code ndr_err;
- const struct ndr_interface_table *table = (const struct ndr_interface_table *)dce_call->context->iface->private;
+ const struct ndr_interface_table *table = (const struct ndr_interface_table *)dce_call->context->iface->private_data;
uint16_t opnum = dce_call->pkt.u.request.opnum;
dce_call->fault_code = 0;
return NT_STATUS_NET_WRITE_FAULT;
}
+ /*
+ * We don't have support for calls with pipes.
+ */
+ if (table->calls[opnum].in_pipes.num_pipes != 0) {
+ dce_call->fault_code = DCERPC_FAULT_OP_RNG_ERROR;
+ return NT_STATUS_NET_WRITE_FAULT;
+ }
+ if (table->calls[opnum].out_pipes.num_pipes != 0) {
+ dce_call->fault_code = DCERPC_FAULT_OP_RNG_ERROR;
+ return NT_STATUS_NET_WRITE_FAULT;
+ }
+
*r = talloc_size(mem_ctx, table->calls[opnum].struct_size);
if (!*r) {
return NT_STATUS_NO_MEMORY;
/* unravel the NDR for the packet */
ndr_err = table->calls[opnum].ndr_pull(pull, NDR_IN, *r);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
- dcerpc_log_packet(table, opnum, NDR_IN,
+ dcerpc_log_packet(dce_call->conn->packet_log_dir,
+ table, opnum, NDR_IN,
&dce_call->pkt.u.request.stub_and_verifier);
dce_call->fault_code = DCERPC_FAULT_NDR;
return NT_STATUS_NET_WRITE_FAULT;
return NT_STATUS_OK;
}
+static void remote_op_dispatch_done(struct tevent_req *subreq);
+
static NTSTATUS remote_op_dispatch(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, void *r)
{
- struct dcesrv_remote_private *private = dce_call->context->private;
+ struct dcesrv_remote_private *priv = NULL;
uint16_t opnum = dce_call->pkt.u.request.opnum;
- const struct ndr_interface_table *table = dce_call->context->iface->private;
+ const struct ndr_interface_table *table = dce_call->context->iface->private_data;
const struct ndr_interface_call *call;
const char *name;
+ struct tevent_req *subreq;
+ NTSTATUS status;
+
+ status = remote_get_private(dce_call, &priv);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
name = table->calls[opnum].name;
call = &table->calls[opnum];
- if (private->c_pipe->conn->flags & DCERPC_DEBUG_PRINT_IN) {
+ if (priv->c_pipe->conn->flags & DCERPC_DEBUG_PRINT_IN) {
ndr_print_function_debug(call->ndr_print, name, NDR_IN | NDR_SET_VALUES, r);
}
- private->c_pipe->conn->flags |= DCERPC_NDR_REF_ALLOC;
+ priv->c_pipe->conn->flags |= DCERPC_NDR_REF_ALLOC;
+
+ /* we didn't use the return code of this function as we only check the last_fault_code */
+ subreq = dcerpc_binding_handle_call_send(dce_call, dce_call->event_ctx,
+ priv->c_pipe->binding_handle,
+ NULL, table,
+ opnum, mem_ctx, r);
+ if (subreq == NULL) {
+ DEBUG(0,("dcesrv_remote: call[%s] dcerpc_binding_handle_call_send() failed!\n", name));
+ return NT_STATUS_NO_MEMORY;
+ }
+ tevent_req_set_callback(subreq, remote_op_dispatch_done, dce_call);
+
+ dce_call->state_flags |= DCESRV_CALL_STATE_FLAG_ASYNC;
+ return NT_STATUS_OK;
+}
+
+static void remote_op_dispatch_done(struct tevent_req *subreq)
+{
+ struct dcesrv_call_state *dce_call = tevent_req_callback_data(subreq,
+ struct dcesrv_call_state);
+ struct dcesrv_remote_private *priv = talloc_get_type_abort(dce_call->context->private_data,
+ struct dcesrv_remote_private);
+ uint16_t opnum = dce_call->pkt.u.request.opnum;
+ const struct ndr_interface_table *table = dce_call->context->iface->private_data;
+ const struct ndr_interface_call *call;
+ const char *name;
+ NTSTATUS status;
+
+ name = table->calls[opnum].name;
+ call = &table->calls[opnum];
/* we didn't use the return code of this function as we only check the last_fault_code */
- dcerpc_ndr_request(private->c_pipe, NULL, table, opnum, mem_ctx,r);
+ status = dcerpc_binding_handle_call_recv(subreq);
+ TALLOC_FREE(subreq);
- dce_call->fault_code = private->c_pipe->last_fault_code;
+ dce_call->fault_code = priv->c_pipe->last_fault_code;
if (dce_call->fault_code != 0) {
- DEBUG(0,("dcesrv_remote: call[%s] failed with: %s!\n",name, dcerpc_errstr(mem_ctx, dce_call->fault_code)));
- return NT_STATUS_NET_WRITE_FAULT;
+ DEBUG(0,("dcesrv_remote: call[%s] failed with: %s!\n",
+ name, dcerpc_errstr(dce_call, dce_call->fault_code)));
+ goto reply;
}
- if ((dce_call->fault_code == 0) &&
- (private->c_pipe->conn->flags & DCERPC_DEBUG_PRINT_OUT)) {
- ndr_print_function_debug(call->ndr_print, name, NDR_OUT, r);
+ if (NT_STATUS_IS_OK(status) &&
+ (priv->c_pipe->conn->flags & DCERPC_DEBUG_PRINT_OUT)) {
+ ndr_print_function_debug(call->ndr_print, name, NDR_OUT, dce_call->r);
}
- return NT_STATUS_OK;
+reply:
+ status = dcesrv_reply(dce_call);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("dcesrv_remote: call[%s]: dcesrv_reply() failed - %s\n",
+ name, nt_errstr(status)));
+ }
}
static NTSTATUS remote_op_ndr_push(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, struct ndr_push *push, const void *r)
{
enum ndr_err_code ndr_err;
- const struct ndr_interface_table *table = dce_call->context->iface->private;
+ const struct ndr_interface_table *table = dce_call->context->iface->private_data;
uint16_t opnum = dce_call->pkt.u.request.opnum;
/* unravel the NDR for the packet */
static NTSTATUS remote_register_one_iface(struct dcesrv_context *dce_ctx, const struct dcesrv_interface *iface)
{
- int i;
- const struct ndr_interface_table *table = iface->private;
+ unsigned int i;
+ const struct ndr_interface_table *table = iface->private_data;
for (i=0;i<table->endpoints->count;i++) {
NTSTATUS ret;
static NTSTATUS remote_op_init_server(struct dcesrv_context *dce_ctx, const struct dcesrv_endpoint_server *ep_server)
{
- int i;
- const char **ifaces = str_list_make(dce_ctx, lp_parm_string(dce_ctx->lp_ctx, NULL, "dcerpc_remote", "interfaces"),NULL);
+ unsigned int i;
+ char **ifaces = str_list_make(dce_ctx, lpcfg_parm_string(dce_ctx->lp_ctx, NULL, "dcerpc_remote", "interfaces"),NULL);
if (!ifaces) {
DEBUG(3,("remote_op_init_server: no interfaces configured\n"));
iface->syntax_id = if_tabl->syntax_id;
iface->bind = remote_op_bind;
- iface->unbind = remote_op_unbind;
+ iface->unbind = NULL;
iface->ndr_pull = remote_op_ndr_pull;
iface->dispatch = remote_op_dispatch;
iface->reply = remote_op_reply;
iface->ndr_push = remote_op_ndr_push;
- iface->private = if_tabl;
+ iface->private_data = if_tabl;
+ iface->flags = 0;
return true;
}
return false;
}
-NTSTATUS dcerpc_server_remote_init(void)
+NTSTATUS dcerpc_server_remote_init(TALLOC_CTX *ctx)
{
NTSTATUS ret;
- struct dcesrv_endpoint_server ep_server;
-
- ZERO_STRUCT(ep_server);
-
- /* fill in our name */
- ep_server.name = "remote";
+ static const struct dcesrv_endpoint_server ep_server = {
+ /* fill in our name */
+ .name = "remote",
- /* fill in all the operations */
- ep_server.init_server = remote_op_init_server;
+ /* fill in all the operations */
+ .init_server = remote_op_init_server,
- ep_server.interface_by_uuid = remote_op_interface_by_uuid;
- ep_server.interface_by_name = remote_op_interface_by_name;
+ .interface_by_uuid = remote_op_interface_by_uuid,
+ .interface_by_name = remote_op_interface_by_name
+ };
/* register ourselves with the DCERPC subsystem. */
ret = dcerpc_register_ep_server(&ep_server);
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