137 lines
2.6 KiB
C
137 lines
2.6 KiB
C
/** @file
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* @brief Modem context helper driver
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*
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* A modem context driver allowing application to handle all
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* aspects of received protocol data.
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*/
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/*
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* Copyright (c) 2019 Foundries.io
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/logging/log.h>
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LOG_MODULE_REGISTER(modem_context, CONFIG_MODEM_LOG_LEVEL);
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#include <zephyr/kernel.h>
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#include "modem_context.h"
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static struct modem_context *contexts[CONFIG_MODEM_CONTEXT_MAX_NUM];
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int modem_context_sprint_ip_addr(const struct sockaddr *addr, char *buf, size_t buf_size)
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{
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static const char unknown_str[] = "unk";
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if (addr->sa_family == AF_INET6) {
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if (buf_size < NET_IPV6_ADDR_LEN) {
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return -ENOMEM;
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}
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if (net_addr_ntop(AF_INET6, &net_sin6(addr)->sin6_addr,
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buf, buf_size) == NULL) {
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return -ENOMEM;
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}
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return 0;
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}
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if (addr->sa_family == AF_INET) {
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if (buf_size < NET_IPV4_ADDR_LEN) {
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return -ENOMEM;
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}
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if (net_addr_ntop(AF_INET, &net_sin(addr)->sin_addr,
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buf, buf_size) == NULL) {
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return -ENOMEM;
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}
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return 0;
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}
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LOG_ERR("Unknown IP address family:%d", addr->sa_family);
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if (buf_size < sizeof(unknown_str)) {
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return -ENOMEM;
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}
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strcpy(buf, unknown_str);
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return 0;
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}
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int modem_context_get_addr_port(const struct sockaddr *addr, uint16_t *port)
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{
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if (!addr || !port) {
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return -EINVAL;
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}
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if (addr->sa_family == AF_INET6) {
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*port = ntohs(net_sin6(addr)->sin6_port);
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return 0;
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} else if (addr->sa_family == AF_INET) {
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*port = ntohs(net_sin(addr)->sin_port);
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return 0;
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}
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return -EPROTONOSUPPORT;
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}
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/**
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* @brief Finds modem context which owns the iface device.
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*
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* @param dev: device used by the modem iface.
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*
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* @retval Modem context or NULL.
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*/
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struct modem_context *modem_context_from_iface_dev(const struct device *dev)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(contexts); i++) {
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if (contexts[i] && contexts[i]->iface.dev == dev) {
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return contexts[i];
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}
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}
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return NULL;
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}
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/**
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* @brief Assign a modem context if there is free space.
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*
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* @note Amount of stored modem contexts is determined by
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* CONFIG_MODEM_CONTEXT_MAX_NUM.
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*
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* @param ctx: modem context to persist.
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*
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* @retval 0 if ok, < 0 if error.
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*/
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static int modem_context_get(struct modem_context *ctx)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(contexts); i++) {
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if (!contexts[i]) {
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contexts[i] = ctx;
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return 0;
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}
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}
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return -ENOMEM;
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}
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struct modem_context *modem_context_from_id(int id)
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{
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if (id >= 0 && id < ARRAY_SIZE(contexts)) {
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return contexts[id];
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} else {
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return NULL;
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}
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}
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int modem_context_register(struct modem_context *ctx)
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{
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if (!ctx) {
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return -EINVAL;
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}
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return modem_context_get(ctx);
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}
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