blob: 01cd1ced6a5cd63f6397af7a95a39dbeb3e24239 [file] [log] [blame]
/** @file
* @brief Modem context helper driver
*
* A modem context driver allowing application to handle all
* aspects of received protocol data.
*/
/*
* Copyright (c) 2019 Foundries.io
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(modem_context, CONFIG_MODEM_LOG_LEVEL);
#include <zephyr/kernel.h>
#include "modem_context.h"
static struct modem_context *contexts[CONFIG_MODEM_CONTEXT_MAX_NUM];
int modem_context_sprint_ip_addr(const struct sockaddr *addr, char *buf, size_t buf_size)
{
static const char unknown_str[] = "unk";
if (addr->sa_family == AF_INET6) {
if (buf_size < NET_IPV6_ADDR_LEN) {
return -ENOMEM;
}
if (net_addr_ntop(AF_INET6, &net_sin6(addr)->sin6_addr,
buf, buf_size) == NULL) {
return -ENOMEM;
}
return 0;
}
if (addr->sa_family == AF_INET) {
if (buf_size < NET_IPV4_ADDR_LEN) {
return -ENOMEM;
}
if (net_addr_ntop(AF_INET, &net_sin(addr)->sin_addr,
buf, buf_size) == NULL) {
return -ENOMEM;
}
return 0;
}
LOG_ERR("Unknown IP address family:%d", addr->sa_family);
if (buf_size < sizeof(unknown_str)) {
return -ENOMEM;
}
strcpy(buf, unknown_str);
return 0;
}
int modem_context_get_addr_port(const struct sockaddr *addr, uint16_t *port)
{
if (!addr || !port) {
return -EINVAL;
}
if (addr->sa_family == AF_INET6) {
*port = ntohs(net_sin6(addr)->sin6_port);
return 0;
} else if (addr->sa_family == AF_INET) {
*port = ntohs(net_sin(addr)->sin_port);
return 0;
}
return -EPROTONOSUPPORT;
}
/**
* @brief Finds modem context which owns the iface device.
*
* @param dev: device used by the modem iface.
*
* @retval Modem context or NULL.
*/
struct modem_context *modem_context_from_iface_dev(const struct device *dev)
{
int i;
for (i = 0; i < ARRAY_SIZE(contexts); i++) {
if (contexts[i] && contexts[i]->iface.dev == dev) {
return contexts[i];
}
}
return NULL;
}
/**
* @brief Assign a modem context if there is free space.
*
* @note Amount of stored modem contexts is determined by
* CONFIG_MODEM_CONTEXT_MAX_NUM.
*
* @param ctx: modem context to persist.
*
* @retval 0 if ok, < 0 if error.
*/
static int modem_context_get(struct modem_context *ctx)
{
int i;
for (i = 0; i < ARRAY_SIZE(contexts); i++) {
if (!contexts[i]) {
contexts[i] = ctx;
return 0;
}
}
return -ENOMEM;
}
struct modem_context *modem_context_from_id(int id)
{
if (id >= 0 && id < ARRAY_SIZE(contexts)) {
return contexts[id];
} else {
return NULL;
}
}
int modem_context_register(struct modem_context *ctx)
{
if (!ctx) {
return -EINVAL;
}
return modem_context_get(ctx);
}