144 lines
3.7 KiB
C
144 lines
3.7 KiB
C
/*! @file
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@brief Network context API
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An API for applications to define a network connection.
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*/
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/*
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* Copyright (c) 2015 Intel Corporation
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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 are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN 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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#include <nanokernel.h>
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#include <string.h>
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#include <errno.h>
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#include <net/net_ip.h>
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#include <net/net_socket.h>
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struct net_context {
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/* Connection tuple identifies the connection */
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struct net_tuple tuple;
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/* Application receives data via this fifo */
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struct nano_fifo rx_queue;
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};
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/* Override this in makefile if needed */
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#ifndef NET_MAX_CONTEXT
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#define NET_MAX_CONTEXT 5
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#endif
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static struct net_context contexts[NET_MAX_CONTEXT];
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static struct nano_sem contexts_lock;
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static void context_sem_give(struct nano_sem *chan)
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{
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switch (context_type_get()) {
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case NANO_CTX_FIBER:
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nano_fiber_sem_give(chan);
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break;
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case NANO_CTX_TASK:
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nano_task_sem_give(chan);
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break;
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case NANO_CTX_ISR:
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default:
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/* Invalid context type */
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break;
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}
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}
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struct net_context *net_context_get(enum ip_protocol ip_proto,
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const struct net_addr *remote_addr,
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uint16_t remote_port,
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const struct net_addr *local_addr,
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uint16_t local_port)
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{
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int i;
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struct net_context *context = NULL;
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nano_sem_take_wait(&contexts_lock);
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for (i = 0; i < NET_MAX_CONTEXT; i++) {
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if (!contexts[i].tuple.remote_port) {
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contexts[i].tuple.ip_proto = ip_proto;
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contexts[i].tuple.remote_addr = (struct net_addr *)remote_addr;
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contexts[i].tuple.remote_port = remote_port;
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contexts[i].tuple.local_addr = (struct net_addr *)local_addr;
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contexts[i].tuple.local_port = local_port;
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context = &contexts[i];
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break;
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}
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}
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context_sem_give(&contexts_lock);
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return context;
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}
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void net_context_put(struct net_context *context)
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{
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int i;
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nano_sem_take_wait(&contexts_lock);
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for (i = 0; i < NET_MAX_CONTEXT; i++) {
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if (contexts[i].tuple.remote_port) {
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memset(&contexts[i].tuple, 0,
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sizeof(contexts[i].tuple));
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break;
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}
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}
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context_sem_give(&contexts_lock);
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}
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struct net_tuple *net_context_get_tuple(struct net_context *context)
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{
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if (!context) {
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return NULL;
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}
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return &context->tuple;
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}
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void net_context_init(void)
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{
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int i;
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nano_sem_init(&contexts_lock);
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memset(contexts, 0, sizeof(contexts));
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for (i = 0; i < NET_MAX_CONTEXT; i++) {
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nano_fifo_init(&contexts[i].rx_queue);
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}
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context_sem_give(&contexts_lock);
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}
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