This patch adds a better dcerpc server infastructure.

1.) We now register endpoint servers add startup via register_backend()
    and later use the smb.conf 'dcerpc endpoint servers' parameter to setup the dcesrv_context

2.) each endpoint server can register at context creation time as much interfaces as it wants
    (multiple interfaces on one endpoint are supported!)
    (NOTE:  there's a difference between 'endpoint server' and 'endpoint'!
	    for details look at rpc_server/dcesrv_server.h)

3.) one endpoint can have a security descriptor registered to it self
    this will be checked in the future when a client wants to connect
    to an smb pipe endpoint.

4.) we now have a 'remote' endpoint server, which works like the ntvfs_cifs module
    it takes this options in the [globals] section:

    dcerpc remote:interfaces = srvsvc, winreg, w32time, epmapper
    dcerpc remote:binding = ...
    dcerpc remote:user = ...
    dcerpc remote:password = ...

5.) we currently have tree endpoint servers: epmapper, rpcecho and remote

    the default for the 'dcerpc endpiont servers = epmapper, rpcecho'

    for testing you can also do
    dcerpc endpoint servers = rpcecho, remote, epmapper
    dcerpc remote:interfaces = srvsvc, samr, netlogon

6,) please notice the the epmapper now only returns NO_ENTRIES
    (but I think we'll find a solution for this too:-)

7.) also there're some other stuff left, but step by step :-)

This patch also includes updates for the
register_subsystem() , ntvfs_init(), and some other funtions
to check for duplicate subsystem registration


metze

(hmmm, my first large commit...I hope it works as supposed :-)
(This used to be commit 917e45dafd5be4c2cd90ff425b8d6f8403122349)

1 files changed, 198 insertions, 0 deletions

diff --git a/source4/rpc_server/remote/dcesrv_remote.c b/source4/rpc_server/remote/dcesrv_remote.c
new file mode 100644
index 0000000000..381c79135c
--- /dev/null
+++ b/source4/rpc_server/remote/dcesrv_remote.c
@@ -0,0 +1,198 @@
+/* 
+   Unix SMB/CIFS implementation.
+   remote dcerpc operations
+
+   Copyright (C) Stefan (metze) Metzmacher 2004
+   
+   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"
+
+struct dcesrv_remote_private {
+	struct dcerpc_pipe *c_pipe;
+	void *private;	
+};
+
+static NTSTATUS remote_op_bind(struct dcesrv_call_state *dce_call, const struct dcesrv_interface *iface)
+{
+        NTSTATUS status;
+        struct dcesrv_remote_private *private;
+	const char *binding = lp_parm_string(-1, "dcerpc_remote", "binding");
+	const char *print_debug = lp_parm_string(-1, "dcerpc_remote", "print_debug");
+
+	if (!binding) {
+		printf("You must specify a ncacn binding string\n");
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	private = talloc_p(dce_call->conn->mem_ctx, struct dcesrv_remote_private);
+	if (!private) {
+		return NT_STATUS_NO_MEMORY;	
+	}
+
+	status = dcerpc_pipe_connect(&(private->c_pipe), binding, iface->ndr->uuid, iface->ndr->if_version,
+				     lp_workgroup(), 
+				     lp_parm_string(-1, "dcerpc_remote", "username"),
+				     lp_parm_string(-1, "dcerpc_remote", "password"));
+
+	if (print_debug && strcasecmp("yes",print_debug) == 0) {
+		private->c_pipe->flags |= DCERPC_DEBUG_PRINT_BOTH;
+	}
+
+	dce_call->conn->private = private;
+
+	return NT_STATUS_OK;	
+}
+
+static void remote_op_unbind(struct dcesrv_connection *dce_conn, const struct dcesrv_interface *iface)
+{
+	struct dcesrv_remote_private *private = dce_conn->private;
+
+	dcerpc_pipe_close(private->c_pipe);
+
+	return;	
+}
+
+static NTSTATUS remote_op_dispatch(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, void *r)
+{
+	struct dcesrv_remote_private *private = dce_call->conn->private;
+	NTSTATUS status;
+	uint16 opnum = dce_call->pkt.u.request.opnum;
+	ndr_push_flags_fn_t ndr_push_fn = dce_call->conn->iface->ndr->calls[opnum].ndr_push;
+	ndr_pull_flags_fn_t ndr_pull_fn = dce_call->conn->iface->ndr->calls[opnum].ndr_pull;
+	size_t struct_size = dce_call->conn->iface->ndr->calls[opnum].struct_size;
+
+	status = dcerpc_ndr_request(private->c_pipe, opnum, mem_ctx,
+				    (ndr_push_flags_fn_t) ndr_push_fn,
+				    (ndr_pull_flags_fn_t) ndr_pull_fn,
+				    r, struct_size);
+
+	return status;
+}
+
+static NTSTATUS remote_register_one_iface(struct dcesrv_context *dce_ctx, const struct dcesrv_interface *iface)
+{
+	int i;
+
+	for (i=0;i<iface->ndr->endpoints->count;i++) {
+		NTSTATUS ret;
+		const char *name = iface->ndr->endpoints->names[i];
+
+		ret = dcesrv_interface_register(dce_ctx, name, iface, NULL);
+		if (!NT_STATUS_IS_OK(ret)) {
+			DEBUG(1,("remote_op_init_server: failed to register endpoint '%s'\n",name));
+			return ret;
+		}
+	}
+
+	return NT_STATUS_OK;
+}
+
+static NTSTATUS remote_op_init_server(struct dcesrv_context *dce_ctx, const struct dcesrv_endpoint_server *ep_server)
+{
+	int i;
+	char **ifaces = str_list_make(lp_parm_string(-1,"dcerpc_remote","interfaces"),NULL);
+
+	if (!ifaces) {
+		DEBUG(3,("remote_op_init_server: no interfaces configured\n"));
+		return NT_STATUS_OK;
+	}
+
+	for (i=0;ifaces[i];i++) {
+		NTSTATUS ret;
+		struct dcesrv_interface iface;
+		
+		if (!ep_server->interface_by_name(&iface, ifaces[i])) {
+			DEBUG(0,("remote_op_init_server: failed to find interface = '%s'\n", ifaces[i]));
+			str_list_free(&ifaces);
+			return NT_STATUS_UNSUCCESSFUL;
+		}
+
+		ret = remote_register_one_iface(dce_ctx, &iface);
+		if (!NT_STATUS_IS_OK(ret)) {
+			DEBUG(0,("remote_op_init_server: failed to register interface = '%s'\n", ifaces[i]));
+			str_list_free(&ifaces);
+			return ret;
+		}
+	}
+
+	str_list_free(&ifaces);
+	return NT_STATUS_OK;
+}
+
+static BOOL remote_fill_interface(struct dcesrv_interface *iface, const struct dcerpc_interface_table *if_tabl)
+{
+	iface->ndr = if_tabl;
+
+	iface->bind = remote_op_bind;
+	iface->unbind = remote_op_unbind;
+	iface->dispatch = remote_op_dispatch;
+
+	return True;
+}
+
+static BOOL remote_op_interface_by_uuid(struct dcesrv_interface *iface, const char *uuid, uint32 if_version)
+{
+	int i;
+
+	for (i=0;dcerpc_pipes[i];i++) {
+		if (dcerpc_pipes[i]->if_version == if_version &&
+			strcmp(dcerpc_pipes[i]->uuid, uuid)==0) {
+			return remote_fill_interface(iface, dcerpc_pipes[i]);
+		}
+	}
+
+	return False;	
+}
+
+static BOOL remote_op_interface_by_name(struct dcesrv_interface *iface, const char *name)
+{
+	int i;
+
+	for (i=0;dcerpc_pipes[i];i++) {
+		if (strcmp(dcerpc_pipes[i]->name, name)==0) {
+			return remote_fill_interface(iface, dcerpc_pipes[i]);
+		}
+	}
+
+	return False;	
+}
+
+NTSTATUS dcerpc_remote_init(void)
+{
+	NTSTATUS ret;
+	struct dcesrv_endpoint_server ep_server;
+
+	ZERO_STRUCT(ep_server);
+
+	/* fill in our name */
+	ep_server.name = "remote";
+
+	/* fill in all the operations */
+	ep_server.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;
+
+	/* register ourselves with the NTVFS subsystem. */
+	ret = register_backend("dcerpc", &ep_server);
+	if (!NT_STATUS_IS_OK(ret)) {
+		DEBUG(0,("Failed to register 'remote' endpoint server!\n"));
+		return ret;
+	}
+
+	return ret;
+}