427b3b8fcb
net/utils: return from net_breaklock() was being clobbered.
net/: Replace all calls to iob_alloc() with calls to net_ioballoc() which will release the network lock, if necessary.
net/utils, tcp, include/net: Separate out the special IOB allocation logic and place it in its own function. Prototype is available in a public header file where it can also be used by network drivers.
net/utils: net_timedwait() now uses new net_breaklock() and net_restorelock().
562 lines
17 KiB
C
562 lines
17 KiB
C
/****************************************************************************
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* net/ieee802154/ieee802154_sendto.c
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*
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* Copyright (C) 2017-2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <debug.h>
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#include <arch/irq.h>
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#include <nuttx/clock.h>
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#include <nuttx/semaphore.h>
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#include <nuttx/mm/iob.h>
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#include <nuttx/net/radiodev.h>
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#include <nuttx/net/net.h>
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#include "utils/utils.h"
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#include "netdev/netdev.h"
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#include "devif/devif.h"
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#include "socket/socket.h"
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#include "ieee802154/ieee802154.h"
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#ifdef CONFIG_NET_IEEE802154
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/* This structure holds the state of the send operation until it can be
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* operated upon by the event handler.
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*/
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struct ieee802154_sendto_s
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{
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FAR struct socket *is_sock; /* Points to the parent socket structure */
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FAR struct devif_callback_s *is_cb; /* Reference to callback instance */
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struct ieee802154_saddr_s is_destaddr; /* Frame destination address */
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sem_t is_sem; /* Used to wake up the waiting thread */
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FAR const uint8_t *is_buffer; /* User buffer of data to send */
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size_t is_buflen; /* Number of bytes in the is_buffer */
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ssize_t is_sent; /* The number of bytes sent (or error) */
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: ieee802154_anyaddrnull
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*
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* Description:
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* If the destination address is all zero in the MAC header buf, then it is
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* broadcast on the 802.15.4 network.
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*
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* Input Parameters:
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* addr - The address to check
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* addrlen - The length of the address in bytes
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*
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* Returned Value:
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* True if the address is all zero.
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*
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****************************************************************************/
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static bool ieee802154_anyaddrnull(FAR const uint8_t *addr, uint8_t addrlen)
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{
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while (addrlen-- > 0)
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{
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if (addr[addrlen] != 0x00)
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{
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return false;
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}
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}
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return true;
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}
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/****************************************************************************
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* Name: ieee802154_saddrnull
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*
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* Description:
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* If the destination address is all zero in the MAC header buf, then it is
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* broadcast on the 802.15.4 network.
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*
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* Input Parameters:
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* eaddr - The short address to check
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*
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* Returned Value:
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* The address length associated with the address mode.
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*
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****************************************************************************/
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static inline bool ieee802154_saddrnull(FAR const uint8_t *saddr)
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{
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return ieee802154_anyaddrnull(saddr, IEEE802154_SADDRSIZE);
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}
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/****************************************************************************
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* Name: ieee802154_eaddrnull
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*
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* Description:
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* If the destination address is all zero in the MAC header buf, then it is
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* broadcast on the 802.15.4 network.
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*
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* Input Parameters:
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* eaddr - The extended address to check
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*
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* Returned Value:
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* The address length associated with the address mode.
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*
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****************************************************************************/
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static inline bool ieee802154_eaddrnull(FAR const uint8_t *eaddr)
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{
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return ieee802154_anyaddrnull(eaddr, IEEE802154_EADDRSIZE);
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}
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/****************************************************************************
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* Name: ieee802154_meta_data
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*
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* Description:
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* Based on the collected attributes and addresses, construct the MAC meta
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* data structure that we need to interface with the IEEE 802.15.4 MAC.
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*
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* Input Parameters:
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* radio - Radio network driver state instance.
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* pstate - Send state structure instance
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* meta - Location to return the corresponding meta data.
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* paylen - The size of the data payload to be sent.
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*
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* Returned Value:
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* Ok is returned on success; Othewise a negated errno value is returned.
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*
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* Assumptions:
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* Called with the network locked.
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*
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****************************************************************************/
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static void ieee802154_meta_data(FAR struct radio_driver_s *radio,
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FAR struct ieee802154_sendto_s *pstate,
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FAR struct ieee802154_frame_meta_s *meta)
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{
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FAR struct ieee802154_saddr_s *destaddr;
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FAR struct ieee802154_saddr_s *srcaddr;
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FAR struct ieee802154_conn_s *conn;
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FAR struct socket *psock;
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bool rcvrnull;
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DEBUGASSERT(radio != NULL && pstate != NULL && pstate->is_sock != NULL &&
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meta != NULL);
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psock = pstate->is_sock;
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DEBUGASSERT(psock->s_conn != NULL);
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conn = (FAR struct ieee802154_conn_s *)psock->s_conn;
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srcaddr = &conn->laddr;
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destaddr = &pstate->is_destaddr;
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DEBUGASSERT(srcaddr->s_mode != IEEE802154_ADDRMODE_NONE &&
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destaddr->s_mode != IEEE802154_ADDRMODE_NONE);
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/* Initialize all settings to all zero */
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memset(meta, 0, sizeof(struct ieee802154_frame_meta_s));
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/* Source address mode */
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meta->srcmode = srcaddr->s_mode;
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/* Check for a broadcast destination address (all zero) */
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if (destaddr->s_mode == IEEE802154_ADDRMODE_EXTENDED)
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{
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/* Extended destination address mode */
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rcvrnull = ieee802154_eaddrnull(destaddr->s_eaddr);
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}
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else
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{
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/* Short destination address mode */
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rcvrnull = ieee802154_saddrnull(destaddr->s_saddr);
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}
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if (rcvrnull)
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{
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meta->flags.ackreq = TRUE;
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}
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/* Destination address */
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/* If the output address is NULL, then it is broadcast on the 802.15.4
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* network.
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*/
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if (rcvrnull)
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{
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/* Broadcast requires short address mode. */
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meta->destaddr.mode = IEEE802154_ADDRMODE_SHORT;
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IEEE802154_PANIDCOPY(meta->destaddr.panid, destaddr->s_panid);
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meta->destaddr.saddr[0] = 0xff;
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meta->destaddr.saddr[1] = 0xff;
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memset(meta->destaddr.eaddr, 0, IEEE802154_EADDRSIZE);
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}
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else
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{
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/* Destination address. */
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meta->destaddr.mode = destaddr->s_mode;
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IEEE802154_PANIDCOPY(meta->destaddr.panid, destaddr->s_panid);
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if (destaddr->s_mode == IEEE802154_ADDRMODE_SHORT)
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{
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IEEE802154_SADDRCOPY(meta->destaddr.saddr, destaddr->s_eaddr);
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memset(meta->destaddr.eaddr, 0, IEEE802154_EADDRSIZE);
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}
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else
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{
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IEEE802154_EADDRCOPY(meta->destaddr.eaddr, destaddr->s_eaddr);
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memset(meta->destaddr.saddr, 0, IEEE802154_SADDRSIZE);
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}
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}
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/* Handle associated with MSDU. Will increment once per packet, not
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* necesarily per frame: The same MSDU handle will be used for each
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* fragment of a disassembled packet.
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*/
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meta->handle = radio->r_msdu_handle++;
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#ifdef CONFIG_IEEE802154_SECURITY
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# warning CONFIG_IEEE802154_SECURITY not yet supported
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#endif
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#ifdef CONFIG_IEEE802154_UWB
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# warning CONFIG_IEEE802154_UWB not yet supported
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#endif
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/* Ranging left zero */
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}
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/****************************************************************************
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* Name: ieee802154_sendto_eventhandler
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****************************************************************************/
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static uint16_t ieee802154_sendto_eventhandler(FAR struct net_driver_s *dev,
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FAR void *pvconn,
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FAR void *pvpriv,
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uint16_t flags)
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{
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FAR struct radio_driver_s *radio;
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FAR struct ieee802154_sendto_s *pstate;
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struct ieee802154_frame_meta_s meta;
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FAR struct iob_s *iob;
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int hdrlen;
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int ret;
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DEBUGASSERT(pvpriv != NULL && dev != NULL && pvconn != NULL);
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/* Ignore polls from non IEEE 802.15.4 network drivers */
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if (dev->d_lltype != NET_LL_IEEE802154)
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{
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return flags;
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}
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/* Make sure that this is the driver to which the socket is connected. */
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#warning Missing logic
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pstate = (FAR struct ieee802154_sendto_s *)pvpriv;
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radio = (FAR struct radio_driver_s *)dev;
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ninfo("flags: %04x sent: %d\n", flags, pstate->is_sent);
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if (pstate != NULL && (flags & IEEE802154_POLL) != 0)
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{
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/* Initialize the meta data */
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ieee802154_meta_data(radio, pstate, &meta);
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/* Get the IEEE 802.15.4 MAC header length */
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hdrlen = radio->r_get_mhrlen(radio, &meta);
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if (hdrlen < 0)
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{
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nerr("ERROR: Failed to get header length: %d\n", hdrlen);
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ret = hdrlen;
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goto errout;
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}
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/* Verify that the user buffer can fit within the frame with this
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* MAC header.
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*/
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DEBUGASSERT(CONFIG_NET_IEEE802154_FRAMELEN <= CONFIG_IOB_BUFSIZE);
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if (pstate->is_buflen + hdrlen > IEEE802154_FRAMELEN)
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{
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nerr("ERROR: User buffer will not fit into the frame: %u > %u\n",
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(unsigned int)(pstate->is_buflen + hdrlen),
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(unsigned int)CONFIG_IOB_BUFSIZE);
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ret = -E2BIG;
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goto errout;
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}
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/* Allocate an IOB to hold the frame data */
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iob = net_ioballoc(false);
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if (iob == NULL)
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{
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nwarn("WARNING: Failed to allocate IOB\n");
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return flags;
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}
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/* Initialize the IOB */
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iob->io_offset = hdrlen;
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iob->io_len = pstate->is_buflen + hdrlen;
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iob->io_pktlen = pstate->is_buflen + hdrlen;
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/* Copy the user data into the IOB */
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memcpy(&iob->io_data[hdrlen], pstate->is_buffer, pstate->is_buflen);
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/* And submit the IOB to the network driver */
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ret = radio->r_req_data(radio, &meta, iob);
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if (ret < 0)
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{
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nerr("ERROR: r_req_data() failed: %d\n", ret);
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goto errout;
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}
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/* Save the successful result */
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pstate->is_sent = pstate->is_buflen;
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/* Don't allow any further call backs. */
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pstate->is_cb->flags = 0;
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pstate->is_cb->priv = NULL;
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pstate->is_cb->event = NULL;
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/* Wake up the waiting thread */
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nxsem_post(&pstate->is_sem);
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}
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return flags;
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errout:
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/* Don't allow any further call backs. */
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pstate->is_cb->flags = 0;
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pstate->is_cb->priv = NULL;
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pstate->is_cb->event = NULL;
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pstate->is_sent = ret;
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/* Wake up the waiting thread */
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nxsem_post(&pstate->is_sem);
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return flags;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: psock_ieee802154_sendto
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*
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* Description:
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* If sendto() is used on a connection-mode (SOCK_STREAM, SOCK_SEQPACKET)
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* socket, the parameters to and 'tolen' are ignored (and the error EISCONN
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* may be returned when they are not NULL and 0), and the error ENOTCONN is
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* returned when the socket was not actually connected.
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*
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* Input Parameters:
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* psock A pointer to a NuttX-specific, internal socket structure
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* buf Data to send
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* len Length of data to send
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* flags Send flags
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* to Address of recipient
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* tolen The length of the address structure
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*
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* Returned Value:
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* On success, returns the number of characters sent. On error,
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* a negated errno value is retruend. See sendto() for the complete list
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* of return values.
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*
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****************************************************************************/
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ssize_t psock_ieee802154_sendto(FAR struct socket *psock, FAR const void *buf,
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size_t len, int flags,
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FAR const struct sockaddr *to, socklen_t tolen)
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{
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FAR struct sockaddr_ieee802154_s *destaddr;
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FAR struct radio_driver_s *radio;
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FAR struct ieee802154_conn_s *conn;
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struct ieee802154_sendto_s state;
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int ret = OK;
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/* Verify that the sockfd corresponds to valid, allocated socket */
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if (psock == NULL || psock->s_crefs <= 0)
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{
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return -EBADF;
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}
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conn = (FAR struct ieee802154_conn_s *)psock->s_conn;
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DEBUGASSERT(conn != NULL);
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/* Verify that the address is large enough to be a valid PF_IEEE802154
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* address.
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*/
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if (tolen < sizeof(struct ieee802154_saddr_s))
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{
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return -EDESTADDRREQ;
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}
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/* Get the device driver that will service this transfer */
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radio = ieee802154_find_device(conn, &conn->laddr);
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if (radio == NULL)
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{
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return -ENODEV;
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}
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/* Set the socket state to sending */
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psock->s_flags = _SS_SETSTATE(psock->s_flags, _SF_SEND);
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/* Perform the send operation */
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/* Initialize the state structure. This is done with the network
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* locked because we don't want anything to happen until we are
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* ready.
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*/
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net_lock();
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memset(&state, 0, sizeof(struct ieee802154_sendto_s));
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/* This semaphore is used for signaling and, hence, should not have
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* priority inheritance enabled.
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*/
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(void)nxsem_init(&state.is_sem, 0, 0); /* Doesn't really fail */
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(void)nxsem_setprotocol(&state.is_sem, SEM_PRIO_NONE);
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state.is_sock = psock; /* Socket descriptor to use */
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state.is_buflen = len; /* Number of bytes to send */
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state.is_buffer = buf; /* Buffer to send from */
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|
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/* Copy the destination address */
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destaddr = (FAR struct sockaddr_ieee802154_s *)to;
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memcpy(&state.is_destaddr, &destaddr->sa_addr,
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sizeof(struct ieee802154_saddr_s));
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|
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if (len > 0)
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{
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/* Allocate resource to receive a callback */
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state.is_cb = ieee802154_callback_alloc(&radio->r_dev, conn);
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if (state.is_cb)
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{
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/* Set up the callback in the connection */
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state.is_cb->flags = PKT_POLL;
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state.is_cb->priv = (FAR void *)&state;
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state.is_cb->event = ieee802154_sendto_eventhandler;
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/* Notify the device driver that new TX data is available. */
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netdev_txnotify_dev(&radio->r_dev);
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/* Wait for the send to complete or an error to occur.
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* net_lockedwait will also terminate if a signal is received.
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*/
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ret = net_lockedwait(&state.is_sem);
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|
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/* Make sure that no further events are processed */
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ieee802154_callback_free(&radio->r_dev, conn, state.is_cb);
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}
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}
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nxsem_destroy(&state.is_sem);
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net_unlock();
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|
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/* Set the socket state to idle */
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psock->s_flags = _SS_SETSTATE(psock->s_flags, _SF_IDLE);
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|
|
/* Check for a errors, Errors are signaled by negative errno values
|
|
* for the send length
|
|
*/
|
|
|
|
if (state.is_sent < 0)
|
|
{
|
|
return state.is_sent;
|
|
}
|
|
|
|
/* If net_lockedwait failed, then we were probably reawakened by a signal. In
|
|
* this case, net_lockedwait will have returned negated errno appropriately.
|
|
*/
|
|
|
|
if (ret < 0)
|
|
{
|
|
return ret;
|
|
}
|
|
|
|
/* Return the number of bytes actually sent */
|
|
|
|
return state.is_sent;
|
|
}
|
|
|
|
#endif /* CONFIG_NET_IEEE802154 */
|