nut/tools/nut-scanner/scan_ipmi.c

/*
 *  Copyright (C)
 *    2011 - 2012  Arnaud Quette <arnaud.quette@free.fr>
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

/*! \file scan_ipmi.c
    \brief detect NUT supported Power Supply Units
    \author Arnaud Quette <arnaud.quette@free.fr>
*/

#include "common.h"
#include "nut-scan.h"

#ifdef WITH_IPMI
#include "upsclient.h"
#include <freeipmi/freeipmi.h>
#include <stdio.h>
#include <string.h>
#include <ltdl.h>

#define NUT_IPMI_DRV_NAME	"nut-ipmipsu"

/* IPMI defines */
/* 5 seconds for establishing an IPMI connection */
#define IPMI_SESSION_TIMEOUT_LENGTH_DEFAULT			5000
#define IPMI_RETRANSMISSION_TIMEOUT_LENGTH_DEFAULT	250

/* dynamic link library stuff */
static lt_dlhandle dl_handle = NULL;
static const char *dl_error = NULL;

#ifdef HAVE_FREEIPMI_11X_12X
  /* Functions symbols remapping */
  #define IPMI_FRU_CLOSE_DEVICE_ID                     "ipmi_fru_close_device_id"
  #define IPMI_FRU_CTX_DESTROY                         "ipmi_fru_ctx_destroy"
  #define IPMI_FRU_CTX_CREATE                          "ipmi_fru_ctx_create"
  #define IPMI_FRU_CTX_SET_FLAGS                       "ipmi_fru_ctx_set_flags"
  #define IPMI_FRU_OPEN_DEVICE_ID                      "ipmi_fru_open_device_id"
  #define IPMI_FRU_CTX_ERRORMSG                        "ipmi_fru_ctx_errormsg"
  #define IPMI_FRU_READ_DATA_AREA                      "ipmi_fru_read_data_area"
  #define IPMI_FRU_PARSE_NEXT                          "ipmi_fru_next"
  typedef ipmi_fru_ctx_t ipmi_fru_parse_ctx_t;
  typedef ipmi_sdr_ctx_t ipmi_sdr_cache_ctx_t;
  /* Functions remapping */
  static void (*nut_ipmi_sdr_ctx_destroy) (ipmi_sdr_ctx_t ctx);
#else /* HAVE_FREEIPMI_11X_12X */
  #define IPMI_FRU_AREA_SIZE_MAX                                   IPMI_FRU_PARSE_AREA_SIZE_MAX
  #define IPMI_FRU_FLAGS_SKIP_CHECKSUM_CHECKS                      IPMI_FRU_PARSE_FLAGS_SKIP_CHECKSUM_CHECKS
  #define IPMI_FRU_AREA_TYPE_MULTIRECORD_POWER_SUPPLY_INFORMATION  IPMI_FRU_PARSE_AREA_TYPE_MULTIRECORD_POWER_SUPPLY_INFORMATION
  /* Functions symbols remapping */
  #define IPMI_FRU_CLOSE_DEVICE_ID                     "ipmi_fru_parse_close_device_id"
  #define IPMI_FRU_CTX_DESTROY                         "ipmi_fru_parse_ctx_destroy"
  #define IPMI_FRU_CTX_CREATE                            "ipmi_fru_parse_ctx_create"
  #define IPMI_FRU_CTX_SET_FLAGS                         "ipmi_fru_parse_ctx_set_flags"
  #define IPMI_FRU_OPEN_DEVICE_ID                        "ipmi_fru_parse_open_device_id"
  #define IPMI_FRU_CTX_ERRORMSG                          "ipmi_fru_parse_ctx_errormsg"
  #define IPMI_FRU_READ_DATA_AREA                        "ipmi_fru_parse_read_data_area"
  #define IPMI_FRU_PARSE_NEXT                            "ipmi_fru_parse_next"
  /* Functions remapping */
  static void (*nut_ipmi_sdr_cache_ctx_destroy) (ipmi_sdr_cache_ctx_t ctx);
  static void (*nut_ipmi_sdr_parse_ctx_destroy) (ipmi_sdr_parse_ctx_t ctx);
#endif /* HAVE_FREEIPMI_11X_12X */


static int (*nut_ipmi_fru_close_device_id) (ipmi_fru_parse_ctx_t ctx);
static void (*nut_ipmi_fru_ctx_destroy) (ipmi_fru_parse_ctx_t ctx);
static ipmi_fru_parse_ctx_t (*nut_ipmi_fru_ctx_create) (ipmi_ctx_t ipmi_ctx);
static int (*nut_ipmi_fru_ctx_set_flags) (ipmi_fru_parse_ctx_t ctx, unsigned int flags);
static int (*nut_ipmi_fru_open_device_id) (ipmi_fru_parse_ctx_t ctx, uint8_t fru_device_id);
static char * (*nut_ipmi_fru_ctx_errormsg) (ipmi_fru_parse_ctx_t ctx);
static int (*nut_ipmi_fru_read_data_area) (ipmi_fru_parse_ctx_t ctx,
                                   unsigned int *area_type,
                                   unsigned int *area_length,
                                   void *areabuf,
                                   unsigned int areabuflen);
static int (*nut_ipmi_fru_next) (ipmi_fru_parse_ctx_t ctx);
static ipmi_ctx_t (*nut_ipmi_ctx_create) (void);
static int (*nut_ipmi_ctx_find_inband) (ipmi_ctx_t ctx,
                          ipmi_driver_type_t *driver_type,
                          int disable_auto_probe,
                          uint16_t driver_address,
                          uint8_t register_spacing,
                          const char *driver_device,
                          unsigned int workaround_flags,
                          unsigned int flags);
static int (*nut_ipmi_ctx_open_outofband) (ipmi_ctx_t ctx,
                             const char *hostname,
                             const char *username,
                             const char *password,
                             uint8_t authentication_type,
                             uint8_t privilege_level,
                             unsigned int session_timeout,
                             unsigned int retransmission_timeout,
                             unsigned int workaround_flags,
                             unsigned int flags);
static int (*nut_ipmi_ctx_errnum) (ipmi_ctx_t ctx);
static char * (*nut_ipmi_ctx_errormsg) (ipmi_ctx_t ctx);
static int (*nut_ipmi_ctx_close) (ipmi_ctx_t ctx);
static void (*nut_ipmi_ctx_destroy) (ipmi_ctx_t ctx);

/* Internal functions */
static nutscan_device_t * nutscan_scan_ipmi_device(const char * IPaddr, nutscan_ipmi_t * sec);

/* Return 0 on error */
int nutscan_load_ipmi_library(const char *libname_path)
{
	if( dl_handle != NULL ) {
		/* if previous init failed */
		if( dl_handle == (void *)1 ) {
			return 0;
		}
		/* init has already been done */
		return 1;
	}

	if (libname_path == NULL) {
		fprintf(stderr, "IPMI library not found. IPMI search disabled.\n");
		return 0;
	}

	if( lt_dlinit() != 0 ) {
		fprintf(stderr, "Error initializing lt_init\n");
		return 0;
	}

	dl_handle = lt_dlopen(libname_path);
	if (!dl_handle) {
		dl_error = lt_dlerror();
		goto err;
	}

	/* Clear any existing error */
	lt_dlerror();

	*(void **) (&nut_ipmi_fru_close_device_id) = lt_dlsym(dl_handle, IPMI_FRU_CLOSE_DEVICE_ID);
	if ((dl_error = lt_dlerror()) != NULL)  {
			goto err;
	}

	*(void **) (&nut_ipmi_fru_ctx_destroy) = lt_dlsym(dl_handle, IPMI_FRU_CTX_DESTROY);
	if ((dl_error = lt_dlerror()) != NULL)  {
			goto err;
	}

#ifdef HAVE_FREEIPMI_11X_12X

	*(void **) (&nut_ipmi_sdr_ctx_destroy) = lt_dlsym(dl_handle, "ipmi_sdr_ctx_destroy");
	if ((dl_error = lt_dlerror()) != NULL)  {
			goto err;
	}

#else /* HAVE_FREEIPMI_11X_12X */

	*(void **) (&nut_ipmi_sdr_cache_ctx_destroy) = lt_dlsym(dl_handle, "ipmi_sdr_cache_ctx_destroy");
	if ((dl_error = lt_dlerror()) != NULL)  {
			goto err;
	}

	*(void **) (&nut_ipmi_sdr_parse_ctx_destroy) = lt_dlsym(dl_handle, "ipmi_sdr_parse_ctx_destroy");
	if ((dl_error = lt_dlerror()) != NULL)  {
			goto err;
	}
#endif /* HAVE_FREEIPMI_11X_12X */

	*(void **) (&nut_ipmi_fru_ctx_create) = lt_dlsym(dl_handle, IPMI_FRU_CTX_CREATE);
	if ((dl_error = lt_dlerror()) != NULL)  {
			goto err;
	}

	*(void **) (&nut_ipmi_fru_ctx_set_flags) = lt_dlsym(dl_handle, IPMI_FRU_CTX_SET_FLAGS);
	if ((dl_error = lt_dlerror()) != NULL)  {
			goto err;
	}

	*(void **) (&nut_ipmi_fru_open_device_id) = lt_dlsym(dl_handle, IPMI_FRU_OPEN_DEVICE_ID);
	if ((dl_error = lt_dlerror()) != NULL)  {
			goto err;
	}

	*(void **) (&nut_ipmi_fru_ctx_errormsg) = lt_dlsym(dl_handle, IPMI_FRU_CTX_ERRORMSG);
	if ((dl_error = lt_dlerror()) != NULL)  {
			goto err;
	}

	*(void **) (&nut_ipmi_fru_read_data_area) = lt_dlsym(dl_handle, IPMI_FRU_READ_DATA_AREA);
	if ((dl_error = lt_dlerror()) != NULL)  {
			goto err;
	}

	*(void **) (&nut_ipmi_fru_next) = lt_dlsym(dl_handle, IPMI_FRU_PARSE_NEXT);
	if ((dl_error = lt_dlerror()) != NULL)  {
			goto err;
	}

	*(void **) (&nut_ipmi_ctx_create) = lt_dlsym(dl_handle, "ipmi_ctx_create");
	if ((dl_error = lt_dlerror()) != NULL)  {
			goto err;
	}

	*(void **) (&nut_ipmi_ctx_find_inband) = lt_dlsym(dl_handle, "ipmi_ctx_find_inband");
	if ((dl_error = lt_dlerror()) != NULL)  {
			goto err;
	}

	*(void **) (&nut_ipmi_ctx_open_outofband) = lt_dlsym(dl_handle, "ipmi_ctx_open_outofband");
	if ((dl_error = lt_dlerror()) != NULL)  {
			goto err;
	}

	*(void **) (&nut_ipmi_ctx_errnum) = lt_dlsym(dl_handle, "ipmi_ctx_errnum");
	if ((dl_error = lt_dlerror()) != NULL)  {
			goto err;
	}

	*(void **) (&nut_ipmi_ctx_errormsg) = lt_dlsym(dl_handle, "ipmi_ctx_errormsg");
	if ((dl_error = lt_dlerror()) != NULL)  {
			goto err;
	}

	*(void **) (&nut_ipmi_ctx_close) = lt_dlsym(dl_handle, "ipmi_ctx_close");
	if ((dl_error = lt_dlerror()) != NULL)  {
			goto err;
	}

	*(void **) (&nut_ipmi_ctx_destroy) = lt_dlsym(dl_handle, "ipmi_ctx_destroy");
	if ((dl_error = lt_dlerror()) != NULL)  {
			goto err;
	}

	return 1;
err:
	fprintf(stderr, "Cannot load IPMI library (%s) : %s. IPMI search disabled.\n", libname_path, dl_error);
	dl_handle = (void *)1;
	lt_dlexit();
	return 0;
}
/* end of dynamic link library stuff */

/* Cleanup IPMI contexts */
#ifdef HAVE_FREEIPMI_11X_12X
static void nut_freeipmi_cleanup(ipmi_fru_parse_ctx_t fru_parse_ctx,
								 ipmi_sdr_ctx_t sdr_ctx)
#else /* HAVE_FREEIPMI_11X_12X */
static void nut_freeipmi_cleanup(ipmi_fru_parse_ctx_t fru_parse_ctx,
								 ipmi_sdr_cache_ctx_t sdr_cache_ctx,
								 ipmi_sdr_parse_ctx_t sdr_parse_ctx)
#endif /* HAVE_FREEIPMI_11X_12X */
{
	if (fru_parse_ctx) {
		(*nut_ipmi_fru_close_device_id) (fru_parse_ctx);
		(*nut_ipmi_fru_ctx_destroy) (fru_parse_ctx);
	}

#ifdef HAVE_FREEIPMI_11X_12X

	if (sdr_ctx) {
		(*nut_ipmi_sdr_ctx_destroy) (sdr_ctx);
	}

#else /* HAVE_FREEIPMI_11X_12X */

	if (sdr_cache_ctx) {
		(*nut_ipmi_sdr_cache_ctx_destroy) (sdr_cache_ctx);
	}

	if (sdr_parse_ctx) {
		(*nut_ipmi_sdr_parse_ctx_destroy) (sdr_parse_ctx);
	}

#endif /* HAVE_FREEIPMI_11X_12X */
}

/* Return 1 if supported, 0 otherwise */
int is_ipmi_device_supported(ipmi_ctx_t ipmi_ctx, int ipmi_id)
{
	int ret = -1;
	unsigned int area_type = 0;
	unsigned int area_length = 0;
	uint8_t areabuf[IPMI_FRU_AREA_SIZE_MAX+1];
	ipmi_fru_parse_ctx_t fru_parse_ctx = NULL;
#ifdef HAVE_FREEIPMI_11X_12X
	ipmi_sdr_ctx_t sdr_ctx = NULL;
#else /* HAVE_FREEIPMI_11X_12X */
	ipmi_sdr_cache_ctx_t sdr_cache_ctx = NULL;
	ipmi_sdr_parse_ctx_t sdr_parse_ctx = NULL;
#endif /* HAVE_FREEIPMI_11X_12X */

	/* Parse FRU information */
	if (!(fru_parse_ctx = (*nut_ipmi_fru_ctx_create) (ipmi_ctx)))
	{
		fprintf(stderr, "Error with %s(): %s\n", IPMI_FRU_CTX_CREATE, (*nut_ipmi_ctx_errormsg)(ipmi_ctx));
		return 0;
	}

	/* lots of motherboards calculate checksums incorrectly */
	if ((*nut_ipmi_fru_ctx_set_flags) (fru_parse_ctx, IPMI_FRU_FLAGS_SKIP_CHECKSUM_CHECKS) < 0)
	{
#ifdef HAVE_FREEIPMI_11X_12X
		nut_freeipmi_cleanup(fru_parse_ctx, sdr_ctx);
#else
		nut_freeipmi_cleanup(fru_parse_ctx, sdr_cache_ctx, sdr_parse_ctx);
#endif /* HAVE_FREEIPMI_11X_12X */
		return 0;
	}

	if ((*nut_ipmi_fru_open_device_id) (fru_parse_ctx, ipmi_id) < 0)
	{
#ifdef HAVE_FREEIPMI_11X_12X
		nut_freeipmi_cleanup(fru_parse_ctx, sdr_ctx);
#else
		nut_freeipmi_cleanup(fru_parse_ctx, sdr_cache_ctx, sdr_parse_ctx);
#endif /* HAVE_FREEIPMI_11X_12X */
		return 0;
	}

	do
	{
		/* clear fields */
		area_type = 0;
		area_length = 0;
		memset (areabuf, '\0', IPMI_FRU_AREA_SIZE_MAX + 1);

		/* parse FRU buffer */
		if ((*nut_ipmi_fru_read_data_area) (fru_parse_ctx,
											&area_type,
											&area_length,
											areabuf,
											IPMI_FRU_AREA_SIZE_MAX) < 0)
		{
#ifdef HAVE_FREEIPMI_11X_12X
			nut_freeipmi_cleanup(fru_parse_ctx, sdr_ctx);
#else
			nut_freeipmi_cleanup(fru_parse_ctx, sdr_cache_ctx, sdr_parse_ctx);
#endif /* HAVE_FREEIPMI_11X_12X */
			return 0;
		}

		if (area_length)
		{
			if (area_type == IPMI_FRU_AREA_TYPE_MULTIRECORD_POWER_SUPPLY_INFORMATION)
			{
				/* Found a POWER_SUPPLY record */
#ifdef HAVE_FREEIPMI_11X_12X
				nut_freeipmi_cleanup(fru_parse_ctx, sdr_ctx);
#else
				nut_freeipmi_cleanup(fru_parse_ctx, sdr_cache_ctx, sdr_parse_ctx);
#endif /* HAVE_FREEIPMI_11X_12X */
				return 1;
			}
		}
	} while ((ret = (*nut_ipmi_fru_next) (fru_parse_ctx)) == 1);

	/* No need for further errors checking */
#ifdef HAVE_FREEIPMI_11X_12X
	nut_freeipmi_cleanup(fru_parse_ctx, sdr_ctx);
#else
	nut_freeipmi_cleanup(fru_parse_ctx, sdr_cache_ctx, sdr_parse_ctx);
#endif /* HAVE_FREEIPMI_11X_12X */
	return 0;
}

/* Check for IPMI support on a specific (local or remote) system
 * Return NULL on error, or a valid nutscan_device_t otherwise */
nutscan_device_t * nutscan_scan_ipmi_device(const char * IPaddr, nutscan_ipmi_t * ipmi_sec)
{
	ipmi_ctx_t ipmi_ctx = NULL;
	nutscan_device_t * nut_dev = NULL;
	nutscan_device_t * current_nut_dev = NULL;
	int ret = -1;
	int ipmi_id = 0;
	char port_id[64];

	if( !nutscan_avail_ipmi ) {
		return NULL;
	}

	/* Initialize the FreeIPMI library. */
	if (!(ipmi_ctx = (*nut_ipmi_ctx_create) ()))
	{
		/* we have to force cleanup, since exit handler is not yet installed */
		fprintf(stderr, "ipmi_ctx_create\n");
		return NULL;
	}

	/* Are we scanning locally, or over the network? */
	if (IPaddr == NULL) 
	{
		/* FIXME: we need root right to access local IPMI!
		if (!ipmi_is_root ()) {
			fprintf(stderr, "IPMI scan: %s\n", ipmi_ctx_strerror (IPMI_ERR_PERMISSION));
		} */

		if ((ret = (*nut_ipmi_ctx_find_inband) (ipmi_ctx,
					NULL,
					0, /* don't disable auto-probe */
					0,
					0,
					NULL,
					0, /* workaround flags, none by default */
					0  /* flags */
					)) < 0)
		{
			fprintf(stderr, "ipmi_ctx_find_inband: %s\n",
				(*nut_ipmi_ctx_errormsg) (ipmi_ctx));
			return NULL;
		}
		if (!ret)
		{
			/* No local IPMI device detected */
			return NULL;
		}
	}
	else {

#if 0
		if (ipmi_sec->ipmi_version == IPMI_2_0) {

			/* FIXME: need processing?!
			 * int parse_kg (void *out, unsigned int outlen, const char *in)
			 * if ((rv = parse_kg (common_cmd_args_config->k_g, IPMI_MAX_K_G_LENGTH + 1, data->string)) < 0)
			 * {
			 * 	fprintf (stderr, "Config File Error: k_g input formatted incorrectly\n");
			 * 	exit (EXIT_FAILURE);
			 * }*/
			if ((ret = (*nut_ipmi_ctx_open_outofband_2_0) (ipmi_ctx,
															IPaddr,
															ipmi_sec->username,
															ipmi_sec->password,
															ipmi_sec->K_g_BMC_key,
???															(ipmi_sec->K_g_BMC_key) ? config->k_g_len : 0,
															ipmi_sec->privilege_level,
															ipmi_sec->cipher_suite_id,
															IPMI_SESSION_TIMEOUT_LENGTH_DEFAULT,
															IPMI_RETRANSMISSION_TIMEOUT_LENGTH_DEFAULT,
															ipmi_dev->workaround_flags,
															flags) < 0)
			{
				IPMI_MONITORING_DEBUG (("ipmi_ctx_open_outofband_2_0: %s", ipmi_ctx_errormsg (c->ipmi_ctx)));
				if (ipmi_ctx_errnum (c->ipmi_ctx) == IPMI_ERR_USERNAME_INVALID)
					c->errnum = IPMI_MONITORING_ERR_USERNAME_INVALID;
				else if (ipmi_ctx_errnum (c->ipmi_ctx) == IPMI_ERR_PASSWORD_INVALID)
					c->errnum = IPMI_MONITORING_ERR_PASSWORD_INVALID;
				else if (ipmi_ctx_errnum (c->ipmi_ctx) == IPMI_ERR_PRIVILEGE_LEVEL_INSUFFICIENT)
					c->errnum = IPMI_MONITORING_ERR_PRIVILEGE_LEVEL_INSUFFICIENT;
				else if (ipmi_ctx_errnum (c->ipmi_ctx) == IPMI_ERR_PRIVILEGE_LEVEL_CANNOT_BE_OBTAINED)
					c->errnum = IPMI_MONITORING_ERR_PRIVILEGEL_LEVEL_CANNOT_BE_OBTAINED;
				else if (ipmi_ctx_errnum (c->ipmi_ctx) == IPMI_ERR_K_G_INVALID)
					c->errnum = IPMI_MONITORING_ERR_K_G_INVALID;
				else if (ipmi_ctx_errnum (c->ipmi_ctx) == IPMI_ERR_CIPHER_SUITE_ID_UNAVAILABLE)
					c->errnum = IPMI_MONITORING_ERR_CIPHER_SUITE_ID_UNAVAILABLE;
				else if (ipmi_ctx_errnum (c->ipmi_ctx) == IPMI_ERR_PASSWORD_VERIFICATION_TIMEOUT)
					c->errnum = IPMI_MONITORING_ERR_PASSWORD_VERIFICATION_TIMEOUT;
				else if (ipmi_ctx_errnum (c->ipmi_ctx) == IPMI_ERR_IPMI_2_0_UNAVAILABLE)
					c->errnum = IPMI_MONITORING_ERR_IPMI_2_0_UNAVAILABLE;
				else if (ipmi_ctx_errnum (c->ipmi_ctx) == IPMI_ERR_CONNECTION_TIMEOUT)
					c->errnum = IPMI_MONITORING_ERR_CONNECTION_TIMEOUT;
				else if (ipmi_ctx_errnum (c->ipmi_ctx) == IPMI_ERR_SESSION_TIMEOUT)
					c->errnum = IPMI_MONITORING_ERR_SESSION_TIMEOUT;
				else if (ipmi_ctx_errnum (c->ipmi_ctx) == IPMI_ERR_BAD_COMPLETION_CODE
					   || ipmi_ctx_errnum (c->ipmi_ctx) == IPMI_ERR_IPMI_ERROR)
					c->errnum = IPMI_MONITORING_ERR_IPMI_ERROR;
				else if (ipmi_ctx_errnum (c->ipmi_ctx) == IPMI_ERR_BMC_BUSY)
					c->errnum = IPMI_MONITORING_ERR_BMC_BUSY;
				else if (ipmi_ctx_errnum (c->ipmi_ctx) == IPMI_ERR_OUT_OF_MEMORY)
					c->errnum = IPMI_MONITORING_ERR_OUT_OF_MEMORY;
				else if (ipmi_ctx_errnum (c->ipmi_ctx) == IPMI_ERR_HOSTNAME_INVALID)
					c->errnum = IPMI_MONITORING_ERR_HOSTNAME_INVALID;
				else if (ipmi_ctx_errnum (c->ipmi_ctx) == IPMI_ERR_PARAMETERS)
					c->errnum = IPMI_MONITORING_ERR_PARAMETERS;
				else if (ipmi_ctx_errnum (c->ipmi_ctx) == IPMI_ERR_SYSTEM_ERROR)
					c->errnum = IPMI_MONITORING_ERR_SYSTEM_ERROR;
				else
					c->errnum = IPMI_MONITORING_ERR_INTERNAL_ERROR;
				return (-1);
			}
		}
		else { /* Not IPMI 2.0 */

#endif /* 0 */

		/* Fall back to IPMI 1.5 */
		if ((ret = (*nut_ipmi_ctx_open_outofband) (ipmi_ctx,
						IPaddr,
						ipmi_sec->username,
						ipmi_sec->password,
						ipmi_sec->authentication_type,
						ipmi_sec->privilege_level,
						IPMI_SESSION_TIMEOUT_LENGTH_DEFAULT,
						IPMI_RETRANSMISSION_TIMEOUT_LENGTH_DEFAULT,
						ipmi_sec->workaround_flags,
						IPMI_FLAGS_DEFAULT
						)) < 0)
		{
			/* No IPMI device detected on this host!
			if ((*nut_ipmi_ctx_errnum) (ipmi_ctx) == IPMI_ERR_USERNAME_INVALID
			  || (*nut_ipmi_ctx_errnum) (ipmi_ctx) == IPMI_ERR_PASSWORD_INVALID
			  || (*nut_ipmi_ctx_errnum) (ipmi_ctx) == IPMI_ERR_PRIVILEGE_LEVEL_INSUFFICIENT
			  || (*nut_ipmi_ctx_errnum) (ipmi_ctx) == IPMI_ERR_PRIVILEGE_LEVEL_CANNOT_BE_OBTAINED
			  || (*nut_ipmi_ctx_errnum) (ipmi_ctx) == IPMI_ERR_AUTHENTICATION_TYPE_UNAVAILABLE
			  || (*nut_ipmi_ctx_errnum) (ipmi_ctx) == IPMI_ERR_PASSWORD_VERIFICATION_TIMEOUT
			  || (*nut_ipmi_ctx_errnum) (ipmi_ctx) == IPMI_ERR_HOSTNAME_INVALID
			  || (*nut_ipmi_ctx_errnum) (ipmi_ctx) == IPMI_ERR_CONNECTION_TIMEOUT) { */

				/* FIXME: don't log timeout errors */
				fprintf(stderr, "nut_ipmi_ctx_open_outofband: %s\n",
					(*nut_ipmi_ctx_errormsg) (ipmi_ctx));
				return NULL;
			/*}*/
		}
	}

	/* Loop through all possible components */
	for (ipmi_id = 0 ; ipmi_id <= IPMI_FRU_DEVICE_ID_MAX ; ipmi_id++) {

		if (is_ipmi_device_supported(ipmi_ctx, ipmi_id)) {

			if ( (nut_dev = nutscan_new_device()) == NULL ) {
				fprintf(stderr,"Memory allocation error\n");
				nutscan_free_device(current_nut_dev);
				break;
			}

			/* Fill the device structure (sufficient with driver and port) */
			nut_dev->type = TYPE_IPMI;
			nut_dev->driver = strdup(NUT_IPMI_DRV_NAME);
			if (IPaddr == NULL) {
				sprintf(port_id, "id%x", ipmi_id);
			}
			else {
				/* FIXME: also check against "localhost" and its IPv{4,6} */
				sprintf(port_id, "id%x@%s", ipmi_id, IPaddr);
			}
			nut_dev->port = strdup(port_id);
			/* FIXME: also dump device.serial?
			 * using drivers/libfreeipmi_get_board_info() */
			
			current_nut_dev = nutscan_add_device_to_device(
							current_nut_dev,
							nut_dev);

			memset (port_id, 0, sizeof(port_id));
		}
	}

	/* Final cleanup */
	if (ipmi_ctx) {
		(*nut_ipmi_ctx_close) (ipmi_ctx);
		(*nut_ipmi_ctx_destroy) (ipmi_ctx);
	}

	return current_nut_dev;
}

/* General IPMI scan entry point: scan 1 to n devices, local or remote,
 * for IPMI support
 * Return NULL on error, or a valid nutscan_device_t otherwise */
nutscan_device_t * nutscan_scan_ipmi(const char * start_ip, const char * stop_ip, nutscan_ipmi_t * sec)
{
	nutscan_ip_iter_t ip;
	char * ip_str = NULL;
	nutscan_ipmi_t * tmp_sec;
	nutscan_device_t * nut_dev = NULL;
	nutscan_device_t * current_nut_dev = NULL;

	if( !nutscan_avail_ipmi ) {
		return NULL;
	}


	/* Are we scanning locally, or through the network? */
	if (start_ip == NULL) 
	{
		/* Local PSU scan */
		current_nut_dev = nutscan_scan_ipmi_device(NULL, NULL);
	}
	else {
		ip_str = nutscan_ip_iter_init(&ip, start_ip, stop_ip);

		while(ip_str != NULL) {
			tmp_sec = malloc(sizeof(nutscan_ipmi_t));
			memcpy(tmp_sec, sec, sizeof(nutscan_ipmi_t));

			if ((current_nut_dev = nutscan_scan_ipmi_device(ip_str, tmp_sec)) != NULL) {
				/* Store the positive result */
				current_nut_dev = nutscan_add_device_to_device(current_nut_dev, nut_dev);
			}
			/* Prepare the next iteration */
			ip_str = nutscan_ip_iter_inc(&ip);
		};
	}

	return nutscan_rewind_device(current_nut_dev);
}
#else /* WITH_IPMI */
/* stub function */
nutscan_device_t *  nutscan_scan_ipmi(const char * startIP, const char * stopIP, nutscan_ipmi_t * sec)
{
	return NULL;
}
#endif /* WITH_IPMI */