samba-mirror/source3/python/py_common.c

/* 
   Python wrappers for DCERPC/SMB client routines.

   Copyright (C) Tim Potter, 2002
   
   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 "Python.h"

#include "python/py_common.h"

/* Return a tuple of (error code, error string) from a WERROR */

PyObject *py_werror_tuple(WERROR werror)
{
	return Py_BuildValue("[is]", W_ERROR_V(werror), 
			     dos_errstr(werror));
}

/* Return a tuple of (error code, error string) from a WERROR */

PyObject *py_ntstatus_tuple(NTSTATUS ntstatus)
{
	return Py_BuildValue("[is]", NT_STATUS_V(ntstatus), 
			     nt_errstr(ntstatus));
}

/* Initialise samba client routines */

static BOOL initialised;

void py_samba_init(void)
{
	if (initialised)
		return;

	/* Load configuration file */

	if (!lp_load(dyn_CONFIGFILE, True, False, False))
		fprintf(stderr, "Can't load %s\n", dyn_CONFIGFILE);

	/* Misc other stuff */

	load_interfaces();
	
	initialised = True;
}

/* Debuglevel routines */

PyObject *get_debuglevel(PyObject *self, PyObject *args)
{
	PyObject *debuglevel;

	if (!PyArg_ParseTuple(args, ""))
		return NULL;

	debuglevel = PyInt_FromLong(DEBUGLEVEL);

	return debuglevel;
}

PyObject *set_debuglevel(PyObject *self, PyObject *args)
{
	int debuglevel;

	if (!PyArg_ParseTuple(args, "i", &debuglevel))
		return NULL;

	DEBUGLEVEL = debuglevel;

	Py_INCREF(Py_None);
	return Py_None;
}

/* Initialise logging */

PyObject *py_setup_logging(PyObject *self, PyObject *args, PyObject *kw)
{
	BOOL interactive = False;
	char *logfilename = NULL;
	static char *kwlist[] = {"interactive", "logfilename", NULL};

	if (!PyArg_ParseTupleAndKeywords(args, kw, "|is", kwlist,
					 &interactive, &logfilename))
		return NULL;
	
	if (interactive && logfilename) {
		PyErr_SetString(PyExc_RuntimeError,
				"can't be interactive and set log file name");
		return NULL;
	}

	if (interactive)
		setup_logging("spoolss", True);

	if (logfilename) {
		lp_set_logfile(logfilename);
		setup_logging(logfilename, False);
		reopen_logs();
	}

	Py_INCREF(Py_None);
	return Py_None;
}

/* Return a cli_state to a RPC pipe on the given server.  Use the
   credentials passed if not NULL.  Set an exception and return NULL if
   there was an error creating the connection. */

struct cli_state *open_pipe_creds(char *system_name, PyObject *creds, 
				  cli_pipe_fn *connect_fn)
{
	struct ntuser_creds nt_creds;
	struct cli_state *cli;
	
	cli = (struct cli_state *)malloc(sizeof(struct cli_state));
	if (!cli) {
		PyErr_SetString(PyExc_RuntimeError, "out of memory");
		return NULL;
	}

	ZERO_STRUCTP(cli);

	/* Extract credentials from the python dictionary and initialise
	   the ntuser_creds struct from them. */

	ZERO_STRUCT(nt_creds);
	nt_creds.pwd.null_pwd = True;

	if (creds && PyDict_Size(creds) > 0) {
		char *username, *password, *domain;
		PyObject *username_obj, *password_obj, *domain_obj;

		/* Check credentials passed are valid.  This means the
		   username, domain and password keys must exist and be
		   string objects. */

		username_obj = PyDict_GetItemString(creds, "username");
		domain_obj = PyDict_GetItemString(creds, "domain");
		password_obj = PyDict_GetItemString(creds, "password");

		if (!username_obj || !domain_obj || !password_obj) {
		creds_error:

			/* TODO: Either pass in the exception for the
			   module calling open_pipe_creds() or have a
			   global samba python module exception. */

			PyErr_SetString(PyExc_RuntimeError, 
					"invalid credentials");
			return NULL;
		}

		if (!PyString_Check(username_obj) || 
		    !PyString_Check(domain_obj) || 
		    !PyString_Check(password_obj))
			goto creds_error;

		username = PyString_AsString(username_obj);
		domain = PyString_AsString(domain_obj);
		password = PyString_AsString(password_obj);

		if (!username || !domain || !password)
			goto creds_error;

		/* Initialise nt_creds structure with passed creds */

		fstrcpy(nt_creds.user_name, username);
		fstrcpy(nt_creds.domain, domain);

		if (lp_encrypted_passwords())
			pwd_make_lm_nt_16(&nt_creds.pwd, password);
		else
			pwd_set_cleartext(&nt_creds.pwd, password);

		nt_creds.pwd.null_pwd = False;
	}

	/* Now try to connect */

	if (!connect_fn(cli, system_name, &nt_creds)) {
		if (cli) {
			NTSTATUS error = cli_nt_error(cli);

			/* Raise an exception if something went wrong.
  			   FIXME: This should be a more appropriate
  			   exception than PyExc_RuntimeError */

			if (!NT_STATUS_IS_OK(error))
				PyErr_SetObject(PyExc_RuntimeError,
						py_ntstatus_tuple(error));
			else
				PyErr_SetString(PyExc_RuntimeError,
						"error connecting to pipe");
		}
		
		return NULL;
	}

	return cli;
}