ba9486de4a
since it is impossible to track producer and consumer correctly if TCP/IP stack pass IOB directly to netdev Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
302 lines
8.6 KiB
C
302 lines
8.6 KiB
C
/****************************************************************************
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* net/ieee802154/ieee802154_conn.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <string.h>
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#include <assert.h>
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#include <errno.h>
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#include <debug.h>
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#include <arch/irq.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/mm/iob.h>
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#include <nuttx/net/netconfig.h>
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#include <nuttx/net/net.h>
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#include <nuttx/net/netdev.h>
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#include <nuttx/wireless/ieee802154/ieee802154_mac.h>
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#include "devif/devif.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 Data
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****************************************************************************/
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/* The array containing all packet socket connections. Protected via the
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* network lock.
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*/
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#ifndef CONFIG_NET_ALLOC_CONNS
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static struct ieee802154_conn_s
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g_ieee802154_connections[CONFIG_NET_IEEE802154_NCONNS];
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#endif
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/* A list of all free packet socket connections */
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static dq_queue_t g_free_ieee802154_connections;
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/* A list of all allocated packet socket connections */
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static dq_queue_t g_active_ieee802154_connections;
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: ieee802154_conn_initialize
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*
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* Description:
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* Initialize the IEEE 802.15.4 connection structure allocator. Called
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* once and only from ieee802154_initialize().
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*
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* Assumptions:
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* Called early in the initialization sequence
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*
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****************************************************************************/
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void ieee802154_conn_initialize(void)
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{
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#ifndef CONFIG_NET_ALLOC_CONNS
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int i;
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for (i = 0; i < CONFIG_NET_IEEE802154_NCONNS; i++)
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{
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/* Link each pre-allocated connection structure into the free list. */
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dq_addlast(&g_ieee802154_connections[i].sconn.node,
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&g_free_ieee802154_connections);
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}
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#endif
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}
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/****************************************************************************
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* Name: ieee802154_conn_alloc()
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*
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* Description:
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* Allocate a new, uninitialized packet socket connection structure. This
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* is normally something done by the implementation of the socket() API
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*
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****************************************************************************/
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FAR struct ieee802154_conn_s *ieee802154_conn_alloc(void)
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{
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FAR struct ieee802154_conn_s *conn;
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#ifdef CONFIG_NET_ALLOC_CONNS
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int i;
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#endif
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/* The free list is protected by the network lock. */
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net_lock();
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#ifdef CONFIG_NET_ALLOC_CONNS
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if (dq_peek(&g_free_ieee802154_connections) == NULL)
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{
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conn = kmm_zalloc(sizeof(*conn) * CONFIG_NET_IEEE802154_NCONNS);
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if (conn != NULL)
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{
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for (i = 0; i < CONFIG_NET_IEEE802154_NCONNS; i++)
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{
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dq_addlast(&conn[i].sconn.node,
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&g_free_ieee802154_connections);
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}
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}
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}
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#endif
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conn = (FAR struct ieee802154_conn_s *)
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dq_remfirst(&g_free_ieee802154_connections);
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if (conn)
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{
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dq_addlast(&conn->sconn.node, &g_active_ieee802154_connections);
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}
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net_unlock();
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return conn;
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}
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/****************************************************************************
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* Name: ieee802154_conn_free()
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*
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* Description:
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* Free a packet socket connection structure that is no longer in use.
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* This should be done by the implementation of close().
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*
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****************************************************************************/
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void ieee802154_conn_free(FAR struct ieee802154_conn_s *conn)
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{
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FAR struct ieee802154_container_s *container;
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FAR struct ieee802154_container_s *next;
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/* The free list is protected by the network lock. */
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DEBUGASSERT(conn->crefs == 0);
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/* Remove the connection from the active list */
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net_lock();
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dq_rem(&conn->sconn.node, &g_active_ieee802154_connections);
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/* Check if there any any frames attached to the container */
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for (container = conn->rxhead; container != NULL; container = next)
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{
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/* Remove the frame from the list */
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next = container->ic_flink;
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container->ic_flink = NULL;
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/* Free the contained frame data (should be only one in chain) */
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if (container->ic_iob)
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{
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iob_free(container->ic_iob);
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}
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/* And free the container itself */
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ieee802154_container_free(container);
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}
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/* Enqueue the connection into the active list */
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memset(conn, 0, sizeof(*conn));
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/* Free the connection */
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dq_addlast(&conn->sconn.node, &g_free_ieee802154_connections);
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net_unlock();
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}
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/****************************************************************************
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* Name: ieee802154_conn_active()
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*
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* Description:
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* Find a connection structure that is the appropriate
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* connection to be used with the provided IEEE 802.15.4 header
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*
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* Assumptions:
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* This function is called from network logic at with the network locked.
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*
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****************************************************************************/
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FAR struct ieee802154_conn_s *
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ieee802154_conn_active(FAR const struct ieee802154_data_ind_s *meta)
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{
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FAR struct ieee802154_conn_s *conn;
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DEBUGASSERT(meta != NULL);
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for (conn = (FAR struct ieee802154_conn_s *)
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g_active_ieee802154_connections.head;
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conn != NULL;
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conn = (FAR struct ieee802154_conn_s *)conn->sconn.node.flink)
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{
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/* Does the destination address match the bound address of the socket.
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*
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* REVISIT: Currently and explicit address must be assigned. Should we
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* support some moral equivalent to INADDR_ANY?
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*/
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if (meta->dest.mode != conn->laddr.s_mode)
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{
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continue;
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}
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if (meta->dest.mode == IEEE802154_ADDRMODE_SHORT &&
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!IEEE802154_SADDRCMP(meta->dest.saddr, conn->laddr.s_saddr))
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{
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continue;
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}
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if (meta->dest.mode == IEEE802154_ADDRMODE_EXTENDED &&
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!IEEE802154_EADDRCMP(meta->dest.saddr, conn->laddr.s_eaddr))
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{
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continue;
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}
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/* Is the socket "connected?" to a remote peer? If so, check if the
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* source address matches the connected remote address.
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*/
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switch (conn->raddr.s_mode)
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{
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case IEEE802154_ADDRMODE_NONE:
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return conn; /* No.. accept the connection */
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case IEEE802154_ADDRMODE_SHORT:
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if (IEEE802154_SADDRCMP(meta->dest.saddr, conn->raddr.s_saddr))
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{
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return conn;
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}
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break;
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case IEEE802154_ADDRMODE_EXTENDED:
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if (IEEE802154_EADDRCMP(meta->dest.eaddr, conn->raddr.s_eaddr))
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{
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return conn;
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}
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break;
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default:
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nerr("ERROR: Invalid address mode: %u\n", conn->raddr.s_mode);
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return NULL;
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}
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}
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return conn;
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}
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/****************************************************************************
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* Name: ieee802154_conn_next()
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*
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* Description:
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* Traverse the list of allocated packet connections
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*
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* Assumptions:
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* This function is called from network logic at with the network locked.
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*
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****************************************************************************/
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FAR struct ieee802154_conn_s *
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ieee802154_conn_next(FAR struct ieee802154_conn_s *conn)
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{
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if (!conn)
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{
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return (FAR struct ieee802154_conn_s *)
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g_active_ieee802154_connections.head;
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}
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else
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{
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return (FAR struct ieee802154_conn_s *)conn->sconn.node.flink;
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}
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}
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#endif /* CONFIG_NET_IEEE802154 */
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