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/*
* Linux WiMax
* Export the kernel's WiMAX stack wimaxll_state_get() function
*
*
* Copyright (C) 2009 Darius Augulis <augulis.darius@gmail.com>
*
* Based on op-rfkill.c
*
* Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define _GNU_SOURCE
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <errno.h>
#include <assert.h>
#include <linux/types.h>
#include <netlink/msg.h>
#include <netlink/netlink.h>
#include <netlink/genl/genl.h>
#include <wimaxll.h>
#include "internal.h"
#define D_LOCAL 0
#include "debug.h"
/**
* Get Wimax device status from kernel and return it to user space
*
* \param wmx WiMAX device handle
*
* \return Negative errno code on error. Otherwise, one from Wimax device
* status value, defined in enum wimax_st.
*
* Allows the caller to get the state of the Wimax device.
*
* \ingroup device_management
* \internal
*
*/
int wimaxll_state_get(struct wimaxll_handle *wmx)
{
ssize_t result;
struct nl_msg *msg;
result = -EBADF;
if (wmx->ifidx == 0)
goto error_not_any;
msg = nlmsg_new();
if (msg == NULL) {
result = errno;
wimaxll_msg(wmx, "E: STATE_GET: cannot allocate generic"
"netlink message: %m\n");
goto error_msg_alloc;
}
if (genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ,
wimaxll_family_id(wmx), 0, 0,
WIMAX_GNL_OP_STATE_GET, WIMAX_GNL_VERSION) == NULL) {
result = -ENOMEM;
wimaxll_msg(wmx, "E: STATE_GET: error preparing message: "
"%d 0x%08x\n", result, result);
goto error_msg_prep;
}
nla_put_u32(msg, WIMAX_GNL_STGET_IFIDX, (__u32) wmx->ifidx);
result = nl_send_auto_complete(wmx->nlh_tx, msg);
if (result < 0) {
wimaxll_msg(wmx, "E: STATE_GET: error sending message: %zd\n",
result);
goto error_msg_send;
}
/* Read the message ACK from netlink */
result = wimaxll_wait_for_ack(wmx);
if (result < 0 && result != -ENODEV)
wimaxll_msg(wmx, "E: STATE_GET: operation failed: %zd\n", result);
error_msg_prep:
error_msg_send:
nlmsg_free(msg);
error_msg_alloc:
error_not_any:
d_fnend(3, wmx, "(wmx %p) = %d\n", wmx, result);
return result;
}
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