/*

 * iSCSI host helpers

 *

 * Copyright (C) 2008 Mike Christie

 * Copyright (C) 2008 Red Hat, Inc. All rights reserved.

 * maintained by open-iscsi@@googlegroups.com

 *

 * 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.

 *

 * See the file COPYING included with this distribution for more details.

 */

#include <stdlib.h>

#include <stdio.h>

#include <errno.h>

#include "list.h"

#include "iscsi_util.h"

#include "log.h"

#include "iscsi_sysfs.h"

#include "version.h"

#include "iscsi_settings.h"

#include "mgmt_ipc.h"

#include "host.h"

#include "session_info.h"

#include "transport.h"

#include "initiator.h"

#include "iface.h"

#include "iscsi_err.h"

#include "iscsi_netlink.h"

struct _host_info_print_tree_arg {

	unsigned int flags;

	struct iscsi_session **ses;

	uint32_t se_count;

};

static int match_host_to_session(uint32_t host_no, struct iscsi_session *se)

{

	uint32_t sid = 0;

	uint32_t info_host_no;

	int rc;

	sid = iscsi_session_sid_get(se);

	info_host_no = iscsi_sysfs_get_host_no_from_sid(sid, &rc);

	if (rc) {

		log_error("could not get host_no for session%d err %d.",

			  sid, rc);

		return 0;

	}

	return host_no == info_host_no;

}

static void print_host_info(struct iface_rec *iface, char *prefix)

{

	if (strlen(iface->transport_name))

		printf("%sTransport: %s\n", prefix,

		      iface->transport_name);

	else

		printf("%sTransport: %s\n", prefix, UNKNOWN_VALUE);

	if (strlen(iface->iname))

		printf("%sInitiatorname: %s\n", prefix,

		      iface->iname);

	else

		printf("%sInitiatorname: %s\n", prefix, UNKNOWN_VALUE);

	if (!strlen(iface->ipaddress))

		printf("%sIPaddress: %s\n", prefix, UNKNOWN_VALUE);

	else if (strchr(iface->ipaddress, '.'))

		printf("%sIPaddress: %s\n", prefix, iface->ipaddress);

	else

		printf("%sIPaddress: [%s]\n", prefix, iface->ipaddress);

	if (strlen(iface->hwaddress))

		printf("%sHWaddress: %s\n", prefix, iface->hwaddress);

	else

		printf("%sHWaddress: %s\n", prefix, UNKNOWN_VALUE);

	if (strlen(iface->netdev))

		printf("%sNetdev: %s\n", prefix, iface->netdev);

	else

		printf("%sNetdev: %s\n", prefix, UNKNOWN_VALUE);

}

static int host_info_print_flat(void *data, struct host_info *hinfo)

{

	struct iface_rec *iface = &hinfo->iface;

	if (strlen(iface->transport_name))

		printf("%s: ", iface->transport_name);

	else

		printf("%s: ", UNKNOWN_VALUE);

	printf("[%u] ", hinfo->host_no);

	if (!strlen(iface->ipaddress))

		printf("%s,", UNKNOWN_VALUE);

	else if (strchr(iface->ipaddress, '.'))

		printf("%s,", iface->ipaddress);

	else

		printf("[%s],", iface->ipaddress);

	if (strlen(iface->hwaddress))

		printf("[%s],", iface->hwaddress);

	else

		printf("[%s],", UNKNOWN_VALUE);

	if (strlen(iface->netdev))

		printf("%s ", iface->netdev);

	else

		printf("%s ", UNKNOWN_VALUE);

	if (strlen(iface->iname))

		printf("%s\n", iface->iname);

	else

		printf("%s\n", UNKNOWN_VALUE);

	return 0;

}

static int print_host_iface(void *data, struct iface_rec *iface)

{

	char *prefix = data;

	printf("%s**********\n", prefix);

	printf("%sInterface:\n", prefix);

	printf("%s**********\n", prefix);

	printf("%sKernel Name: %s\n", prefix, iface->name);

	if (!strlen(iface->ipaddress))

		printf("%sIPaddress: %s\n", prefix, UNKNOWN_VALUE);

	else if (strchr(iface->ipaddress, '.')) {

		printf("%sIPaddress: %s\n", prefix, iface->ipaddress);

		if (!strlen(iface->gateway))

			printf("%sGateway: %s\n", prefix, UNKNOWN_VALUE);

		else

			printf("%sGateway: %s\n", prefix, iface->gateway);

		if (!strlen(iface->subnet_mask))

			printf("%sSubnet: %s\n", prefix, UNKNOWN_VALUE);

		else

			printf("%sSubnet: %s\n", prefix, iface->subnet_mask);

		if (!strlen(iface->bootproto))

			printf("%sBootProto: %s\n", prefix, UNKNOWN_VALUE);

		else

			printf("%sBootProto: %s\n", prefix, iface->bootproto);

	} else {

		printf("%sIPaddress: [%s]\n", prefix, iface->ipaddress);

		if (!strlen(iface->ipv6_autocfg))

			printf("%sIPaddress Autocfg: %s\n", prefix,

			       UNKNOWN_VALUE);

		else

			printf("%sIPaddress Autocfg: %s\n", prefix,

			       iface->ipv6_autocfg);

		if (!strlen(iface->ipv6_linklocal))

			printf("%sLink Local Address: %s\n", prefix,

			       UNKNOWN_VALUE);

		else

			printf("%sLink Local Address: [%s]\n", prefix,

			       iface->ipv6_linklocal);

		if (!strlen(iface->linklocal_autocfg))

			printf("%sLink Local Autocfg: %s\n", prefix,

			       UNKNOWN_VALUE);

		else

			printf("%sLink Local Autocfg: %s\n", prefix,

			       iface->linklocal_autocfg);

		if (!strlen(iface->ipv6_router))

			printf("%sRouter Address: %s\n", prefix,

			      UNKNOWN_VALUE);

		else

			printf("%sRouter Address: [%s]\n", prefix,

			       iface->ipv6_router);

	}

	if (!strlen(iface->port_state))

		printf("%sPort State: %s\n", prefix, UNKNOWN_VALUE);

	else

		printf("%sPort State: %s\n", prefix, iface->port_state);

	if (!strlen(iface->port_speed))

		printf("%sPort Speed: %s\n", prefix, UNKNOWN_VALUE);

	else

		printf("%sPort Speed: %s\n", prefix, iface->port_speed);

	if (!iface->port)

		printf("%sPort: %s\n", prefix, UNKNOWN_VALUE);

	else

		printf("%sPort: %u\n", prefix, iface->port);

	if (!iface->mtu)

		printf("%sMTU: %s\n", prefix, UNKNOWN_VALUE);

	else

		printf("%sMTU: %u\n", prefix, iface->mtu);

	if (iface->vlan_id == UINT16_MAX)

		printf("%sVLAN ID: %s\n", prefix, UNKNOWN_VALUE);

	else

		printf("%sVLAN ID: %u\n", prefix, iface->vlan_id);

	if (iface->vlan_priority == UINT8_MAX)

		printf("%sVLAN priority: %s\n", prefix, UNKNOWN_VALUE);

	else

		printf("%sVLAN priority: %u\n", prefix, iface->vlan_priority);

	return 0;

}

static void print_host_ifaces(struct host_info *hinfo, char *prefix)

{

	int nr_found = 0;

	iscsi_sysfs_for_each_iface_on_host(prefix, hinfo->host_no, &nr_found,

					   print_host_iface);

}

static int host_info_print_tree(void *data, struct host_info *hinfo)

{

	unsigned int session_info_flags = 0;

	struct _host_info_print_tree_arg *arg = data;

	struct iscsi_session **ses = NULL;

	struct iscsi_session **matched_ses = NULL;

	uint32_t se_count = 0;

	uint32_t matched_se_count = 0;

	uint32_t i = 0;

	char state[SCSI_MAX_STATE_VALUE];

	if (arg == NULL)

		return -EINVAL;

	session_info_flags = arg->flags;

	ses = arg->ses;

	se_count = arg->se_count;

	printf("Host Number: %u\n", hinfo->host_no);

	if (!iscsi_sysfs_get_host_state(state, hinfo->host_no))

		printf("\tState: %s\n", state);

	else

		printf("\tState: Unknown\n");

	print_host_info(&hinfo->iface, "\t");

	print_host_ifaces(hinfo, "\t");

	if ((!session_info_flags) || (!se_count))

		return 0;

	matched_ses = calloc(se_count, sizeof(struct iscsi_session *));

	if (matched_ses == NULL)

		return -ENOMEM;

	for (i = 0; i < se_count; ++i)

		if (match_host_to_session(hinfo->host_no, ses[i]))

			matched_ses[matched_se_count++] = ses[i];

	if (!matched_se_count)

		goto out;

	printf("\t*********\n");

	printf("\tSessions:\n");

	printf("\t*********\n");

	session_info_print_tree(matched_ses, matched_se_count, "\t",

				session_info_flags, 0/* don't show password */);

out:

	free(matched_ses);

	return 0;

}

int host_info_print(int info_level, uint32_t host_no,

		    struct iscsi_session **ses, uint32_t se_count)

{

	int num_found = 0, err = 0;

	char *version;

	unsigned int flags = 0;

	struct _host_info_print_tree_arg arg;

	switch (info_level) {

	case 0:

	case -1:

		err = iscsi_sysfs_for_each_host(NULL, &num_found,

						host_info_print_flat);

		break;

	case 4:

		version = iscsi_sysfs_get_iscsi_kernel_version();

		if (version) {

			printf("iSCSI Transport Class version %s\n",

			       version);

			printf("version %s\n", ISCSI_VERSION_STR);

			free(version);

		}

		flags |= SESSION_INFO_SCSI_DEVS;

		/* fall through */

	case 3:

		flags |= SESSION_INFO_ISCSI_PARAMS;

		/* fall through */

	case 2:

		flags |= SESSION_INFO_ISCSI_STATE | SESSION_INFO_IFACE;

		/* fall through */

	case 1:

		arg.flags = flags;

		arg.ses = ses;

		arg.se_count = se_count;

		if (host_no != -1) {

			struct host_info hinfo;

			memset(&hinfo, 0, sizeof(struct host_info));

			hinfo.host_no = host_no;

			iscsi_sysfs_get_hostinfo_by_host_no(&hinfo);

			host_info_print_tree(&arg, &hinfo);

			num_found = 1;

			break;

		}

		transport_probe_for_offload();

		err = iscsi_sysfs_for_each_host(&arg, &num_found,

						host_info_print_tree);

		break;

	default:

		log_error("Invalid info level %d. Try 0 - 4.", info_level);

		return ISCSI_ERR_INVAL;

	}

	if (err) {

		log_error("Can not get list of iSCSI hosts: %s",

			  iscsi_err_to_str(err));

		return err;

	} else if (!num_found) {

		log_error("No iSCSI hosts.");

		return ISCSI_ERR_NO_OBJS_FOUND;

	}

	return 0;

}

static int chap_fill_param_uint(struct iovec *iov, int param,

				uint32_t param_val, int param_len)

{

	struct iscsi_param_info *param_info;

	struct nlattr *attr;

	int len;

	uint8_t val8 = 0;

	uint16_t val16 = 0;

	uint32_t val32 = 0;

	char *val = NULL;

	len = sizeof(struct iscsi_param_info) + param_len;

	iov->iov_base = iscsi_nla_alloc(param, len);

	if (!iov->iov_base)

		return 1;

	attr = iov->iov_base;

	iov->iov_len = NLA_ALIGN(attr->nla_len);

	param_info = (struct iscsi_param_info *)ISCSI_NLA_DATA(attr);

	param_info->param = param;

	param_info->len = param_len;

	switch (param_len) {

	case 1:

		val8 = (uint8_t)param_val;

		val = (char *)&val;;

		break;

	case 2:

		val16 = (uint16_t)param_val;

		val = (char *)&val16;

		break;

	case 4:

		val32 = (uint32_t)param_val;

		val = (char *)&val32;

		break;

	default:

		goto free;

	}

	memcpy(param_info->value, val, param_len);

	return 0;

free:

	free(iov->iov_base);

	iov->iov_base = NULL;

	iov->iov_len = 0;

	return 1;

}

static int chap_fill_param_str(struct iovec *iov, int param, char *param_val,

			       int param_len)

{

	struct iscsi_param_info *param_info;

	struct nlattr *attr;

	int len;

	len = sizeof(struct iscsi_param_info) + param_len;

	iov->iov_base = iscsi_nla_alloc(param, len);

	if (!iov->iov_base)

		return 1;

	attr = iov->iov_base;

	iov->iov_len = NLA_ALIGN(attr->nla_len);

	param_info = (struct iscsi_param_info *)ISCSI_NLA_DATA(attr);

	param_info->param = param;

	param_info->len = param_len;

	memcpy(param_info->value, param_val, param_len);

	return 0;

}

int chap_build_config(struct iscsi_chap_rec *crec, struct iovec *iovs)

{

	struct iovec *iov = NULL;

	int count = 0;

	/* start at 2, because 0 is for nlmsghdr and 1 for event */

	iov = iovs + 2;

	if (!chap_fill_param_uint(&iov[count], ISCSI_CHAP_PARAM_INDEX,

				  crec->chap_tbl_idx,

				  sizeof(crec->chap_tbl_idx)))

		count++;

	if (!chap_fill_param_uint(&iov[count], ISCSI_CHAP_PARAM_CHAP_TYPE,

				  crec->chap_type, sizeof(crec->chap_type)))

		count++;

	if (!chap_fill_param_str(&iov[count], ISCSI_CHAP_PARAM_USERNAME,

				 crec->username, strlen(crec->username)))

		count++;

	if (!chap_fill_param_str(&iov[count], ISCSI_CHAP_PARAM_PASSWORD,

				 (char *)crec->password,

				 strlen((char *)crec->password)))

		count++;

	if (!chap_fill_param_uint(&iov[count], ISCSI_CHAP_PARAM_PASSWORD_LEN,

				  crec->password_length,

				  sizeof(crec->password_length)))

		count++;

	return count;

}