path: root/net/nfc/netlink.c

/*
 * Copyright (C) 2011 Instituto Nokia de Tecnologia
 *
 * Authors:
 *    Lauro Ramos Venancio <lauro.venancio@openbossa.org>
 *    Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
 *
 * 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.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__

#include <net/genetlink.h>
#include <linux/nfc.h>
#include <linux/slab.h>

#include "nfc.h"
#include "llcp.h"

static struct genl_multicast_group nfc_genl_event_mcgrp = {
	.name = NFC_GENL_MCAST_EVENT_NAME,
};

static struct genl_family nfc_genl_family = {
	.id = GENL_ID_GENERATE,
	.hdrsize = 0,
	.name = NFC_GENL_NAME,
	.version = NFC_GENL_VERSION,
	.maxattr = NFC_ATTR_MAX,
};

static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
	[NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
	[NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
				.len = NFC_DEVICE_NAME_MAXSIZE },
	[NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
	[NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
	[NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
	[NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
	[NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
	[NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
	[NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
	[NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
	[NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
	[NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
};

static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
	[NFC_SDP_ATTR_URI] = { .type = NLA_STRING },
	[NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
};

static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
				struct netlink_callback *cb, int flags)
{
	void *hdr;

	hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
			  &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
	if (!hdr)
		return -EMSGSIZE;

	genl_dump_check_consistent(cb, hdr, &nfc_genl_family);

	if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
	    nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
	    nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
	    nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
		goto nla_put_failure;
	if (