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esp.c
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/*
* Copyright (c) 2019 Tobias Svehagen
* Copyright (c) 2020 Grinn
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT espressif_esp_at
#undef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 200809L
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(wifi_esp_at, CONFIG_WIFI_LOG_LEVEL);
#include <zephyr/kernel.h>
#include <ctype.h>
#include <errno.h>
#include <zephyr/device.h>
#include <zephyr/init.h>
#include <stdlib.h>
#include <string.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/drivers/uart.h>
#include <zephyr/net/dns_resolve.h>
#include <zephyr/net/net_if.h>
#include <zephyr/net/net_ip.h>
#include <zephyr/net/net_offload.h>
#include <zephyr/net/wifi_mgmt.h>
#include <zephyr/net/conn_mgr/connectivity_wifi_mgmt.h>
#include "esp.h"
struct esp_config {
#if DT_INST_NODE_HAS_PROP(0, power_gpios)
const struct gpio_dt_spec power;
#endif
#if DT_INST_NODE_HAS_PROP(0, reset_gpios)
const struct gpio_dt_spec reset;
#endif
};
NET_BUF_POOL_DEFINE(mdm_recv_pool, MDM_RECV_MAX_BUF, MDM_RECV_BUF_SIZE,
0, NULL);
/* RX thread structures */
K_KERNEL_STACK_DEFINE(esp_rx_stack,
CONFIG_WIFI_ESP_AT_RX_STACK_SIZE);
struct k_thread esp_rx_thread;
/* RX thread work queue */
K_KERNEL_STACK_DEFINE(esp_workq_stack,
CONFIG_WIFI_ESP_AT_WORKQ_STACK_SIZE);
static const struct esp_config esp_driver_config = {
#if DT_INST_NODE_HAS_PROP(0, power_gpios)
.power = GPIO_DT_SPEC_INST_GET(0, power_gpios),
#endif
#if DT_INST_NODE_HAS_PROP(0, reset_gpios)
.reset = GPIO_DT_SPEC_INST_GET(0, reset_gpios),
#endif
};
struct esp_data esp_driver_data;
static void esp_configure_hostname(struct esp_data *data)
{
#if defined(CONFIG_NET_HOSTNAME_ENABLE)
char cmd[sizeof("AT+CWHOSTNAME=\"\"") + NET_HOSTNAME_MAX_LEN];
snprintk(cmd, sizeof(cmd), "AT+CWHOSTNAME=\"%s\"", net_hostname_get());
cmd[sizeof(cmd) - 1] = '\0';
esp_cmd_send(data, NULL, 0, cmd, ESP_CMD_TIMEOUT);
#else
ARG_UNUSED(data);
#endif
}
static inline uint8_t esp_mode_from_flags(struct esp_data *data)
{
uint8_t flags = data->flags;
uint8_t mode = 0;
if (flags & (EDF_STA_CONNECTED | EDF_STA_LOCK)) {
mode |= ESP_MODE_STA;
}
if (flags & EDF_AP_ENABLED) {
mode |= ESP_MODE_AP;
}
/*
* ESP AT 1.7 does not allow to disable radio, so enter STA mode
* instead.
*/
if (IS_ENABLED(CONFIG_WIFI_ESP_AT_VERSION_1_7) &&
mode == ESP_MODE_NONE) {
mode = ESP_MODE_STA;
}
return mode;
}
static int esp_mode_switch(struct esp_data *data, uint8_t mode)
{
char cmd[] = "AT+"_CWMODE"=X";
int err;
cmd[sizeof(cmd) - 2] = ('0' + mode);
LOG_DBG("Switch to mode %hhu", mode);
err = esp_cmd_send(data, NULL, 0, cmd, ESP_CMD_TIMEOUT);
if (err) {
LOG_WRN("Failed to switch to mode %d: %d", (int) mode, err);
}
return err;
}
static int esp_mode_switch_if_needed(struct esp_data *data)
{
uint8_t new_mode = esp_mode_from_flags(data);
uint8_t old_mode = data->mode;
int err;
if (old_mode == new_mode) {
return 0;
}
data->mode = new_mode;
err = esp_mode_switch(data, new_mode);
if (err) {
return err;
}
if (!(old_mode & ESP_MODE_STA) && (new_mode & ESP_MODE_STA)) {
/*
* Hostname change is applied only when STA is enabled.
*/
esp_configure_hostname(data);
}
return 0;
}
static void esp_mode_switch_submit_if_needed(struct esp_data *data)
{
if (data->mode != esp_mode_from_flags(data)) {
k_work_submit_to_queue(&data->workq, &data->mode_switch_work);
}
}
static void esp_mode_switch_work(struct k_work *work)
{
struct esp_data *data =
CONTAINER_OF(work, struct esp_data, mode_switch_work);
(void)esp_mode_switch_if_needed(data);
}
static inline int esp_mode_flags_set(struct esp_data *data, uint8_t flags)
{
esp_flags_set(data, flags);
return esp_mode_switch_if_needed(data);
}
static inline int esp_mode_flags_clear(struct esp_data *data, uint8_t flags)
{
esp_flags_clear(data, flags);
return esp_mode_switch_if_needed(data);
}
/*
* Modem Response Command Handlers
*/
/* Handler: OK */
MODEM_CMD_DEFINE(on_cmd_ok)
{
struct esp_data *dev = CONTAINER_OF(data, struct esp_data,
cmd_handler_data);
modem_cmd_handler_set_error(data, 0);
k_sem_give(&dev->sem_response);
return 0;
}
/* Handler: ERROR */
MODEM_CMD_DEFINE(on_cmd_error)
{
struct esp_data *dev = CONTAINER_OF(data, struct esp_data,
cmd_handler_data);
modem_cmd_handler_set_error(data, -EIO);
k_sem_give(&dev->sem_response);
return 0;
}
/* RX thread */
static void esp_rx(void *p1, void *p2, void *p3)
{
ARG_UNUSED(p2);
ARG_UNUSED(p3);
struct esp_data *data = p1;
while (true) {
/* wait for incoming data */
modem_iface_uart_rx_wait(&data->mctx.iface, K_FOREVER);
modem_cmd_handler_process(&data->mctx.cmd_handler, &data->mctx.iface);
/* give up time if we have a solid stream of data */
k_yield();
}
}
static char *str_unquote(char *str)
{
char *end;
if (str[0] != '"') {
return str;
}
str++;
end = strrchr(str, '"');
if (end != NULL) {
*end = 0;
}
return str;
}
/* +CIPSTAMAC:"xx:xx:xx:xx:xx:xx" */
MODEM_CMD_DEFINE(on_cmd_cipstamac)
{
struct esp_data *dev = CONTAINER_OF(data, struct esp_data,
cmd_handler_data);
char *mac;
int err;
mac = str_unquote(argv[0]);
err = net_bytes_from_str(dev->mac_addr, sizeof(dev->mac_addr), mac);
if (err) {
LOG_ERR("Failed to parse MAC address");
}
return 0;
}
static int esp_pull_quoted(char **str, char *str_end, char **unquoted)
{
if (**str != '"') {
return -EAGAIN;
}
(*str)++;
*unquoted = *str;
while (*str < str_end) {
if (**str == '"') {
**str = '\0';
(*str)++;
if (**str == ',') {
(*str)++;
}
return 0;
}
(*str)++;
}
return -EAGAIN;
}
static int esp_pull(char **str, char *str_end)
{
while (*str < str_end) {
if (**str == ',' || **str == ':' || **str == '\r' || **str == '\n') {
char last_c = **str;
**str = '\0';
if (last_c == ',' || last_c == ':') {
(*str)++;
}
return 0;
}
(*str)++;
}
return -EAGAIN;
}
static int esp_pull_raw(char **str, char *str_end, char **raw)
{
*raw = *str;
return esp_pull(str, str_end);
}
static int esp_pull_long(char **str, char *str_end, long *value)
{
char *str_begin = *str;
int err;
char *endptr;
err = esp_pull(str, str_end);
if (err) {
return err;
}
*value = strtol(str_begin, &endptr, 10);
if (endptr == str_begin) {
LOG_ERR("endptr == str_begin");
return -EBADMSG;
}
return 0;
}
/* +CWLAP:(sec,ssid,rssi,channel) */
/* with: CONFIG_WIFI_ESP_AT_SCAN_MAC_ADDRESS: +CWLAP:<ecn>,<ssid>,<rssi>,<mac>,<ch>*/
MODEM_CMD_DIRECT_DEFINE(on_cmd_cwlap)
{
struct esp_data *dev = CONTAINER_OF(data, struct esp_data,
cmd_handler_data);
struct wifi_scan_result res = { 0 };
char cwlap_buf[sizeof("\"0\",\"\",-100,\"xx:xx:xx:xx:xx:xx\",12") +
WIFI_SSID_MAX_LEN * 2 + 1];
char *ecn;
char *ssid;
char *mac;
char *channel;
long rssi;
long ecn_id;
int err;
len = net_buf_linearize(cwlap_buf, sizeof(cwlap_buf) - 1,
data->rx_buf, 0, sizeof(cwlap_buf) - 1);
cwlap_buf[len] = '\0';
char *str = &cwlap_buf[sizeof("+CWJAP:(") - 1];
char *str_end = cwlap_buf + len;
err = esp_pull_raw(&str, str_end, &ecn);
if (err) {
return err;
}
ecn_id = strtol(ecn, NULL, 10);
if (ecn_id == 0) {
res.security = WIFI_SECURITY_TYPE_NONE;
} else {
res.security = WIFI_SECURITY_TYPE_PSK;
}
err = esp_pull_quoted(&str, str_end, &ssid);
if (err) {
return err;
}
err = esp_pull_long(&str, str_end, &rssi);
if (err) {
return err;
}
if (strlen(ssid) > WIFI_SSID_MAX_LEN) {
return -EBADMSG;
}
res.ssid_length = MIN(sizeof(res.ssid), strlen(ssid));
memcpy(res.ssid, ssid, res.ssid_length);
res.rssi = rssi;
if (IS_ENABLED(CONFIG_WIFI_ESP_AT_SCAN_MAC_ADDRESS)) {
err = esp_pull_quoted(&str, str_end, &mac);
if (err) {
return err;
}
res.mac_length = WIFI_MAC_ADDR_LEN;
if (net_bytes_from_str(res.mac, sizeof(res.mac), mac) < 0) {
LOG_ERR("Invalid MAC address");
res.mac_length = 0;
}
}
err = esp_pull_raw(&str, str_end, &channel);
if (err) {
return err;
}
res.channel = strtol(channel, NULL, 10);
if (dev->scan_cb) {
dev->scan_cb(dev->net_iface, 0, &res);
}
return str - cwlap_buf;
}
/* +CWJAP:(ssid,bssid,channel,rssi) */
MODEM_CMD_DIRECT_DEFINE(on_cmd_cwjap)
{
struct esp_data *dev = CONTAINER_OF(data, struct esp_data,
cmd_handler_data);
struct wifi_iface_status *status = dev->wifi_status;
char cwjap_buf[sizeof("\"\",\"xx:xx:xx:xx:xx:xx\",12,-100") +
WIFI_SSID_MAX_LEN * 2 + 1];
uint8_t flags = dev->flags;
char *ssid;
char *bssid;
char *channel;
char *rssi;
int err;
len = net_buf_linearize(cwjap_buf, sizeof(cwjap_buf) - 1,
data->rx_buf, 0, sizeof(cwjap_buf) - 1);
cwjap_buf[len] = '\0';
char *str = &cwjap_buf[sizeof("+CWJAP:") - 1];
char *str_end = cwjap_buf + len;
status->band = WIFI_FREQ_BAND_2_4_GHZ;
status->iface_mode = WIFI_MODE_INFRA;
if (flags & EDF_STA_CONNECTED) {
status->state = WIFI_STATE_COMPLETED;
} else if (flags & EDF_STA_CONNECTING) {
status->state = WIFI_STATE_SCANNING;
} else {
status->state = WIFI_STATE_DISCONNECTED;
}
err = esp_pull_quoted(&str, str_end, &ssid);
if (err) {
return err;
}
err = esp_pull_quoted(&str, str_end, &bssid);
if (err) {
return err;
}
err = esp_pull_raw(&str, str_end, &channel);
if (err) {
return err;
}
err = esp_pull_raw(&str, str_end, &rssi);
if (err) {
return err;
}
strncpy(status->ssid, ssid, sizeof(status->ssid));
status->ssid_len = strnlen(status->ssid, sizeof(status->ssid));
err = net_bytes_from_str(status->bssid, sizeof(status->bssid), bssid);
if (err) {
LOG_WRN("Invalid MAC address");
memset(status->bssid, 0x0, sizeof(status->bssid));
}
status->channel = strtol(channel, NULL, 10);
status->rssi = strtol(rssi, NULL, 10);
return str - cwjap_buf;
}
static void esp_dns_work(struct k_work *work)
{
#if defined(ESP_MAX_DNS)
struct esp_data *data = CONTAINER_OF(work, struct esp_data, dns_work);
struct dns_resolve_context *dnsctx;
struct sockaddr_in *addrs = data->dns_addresses;
const struct sockaddr *dns_servers[ESP_MAX_DNS + 1] = {};
size_t i;
int err;
for (i = 0; i < ESP_MAX_DNS; i++) {
if (!addrs[i].sin_addr.s_addr) {
break;
}
dns_servers[i] = (struct sockaddr *) &addrs[i];
}
dnsctx = dns_resolve_get_default();
err = dns_resolve_reconfigure(dnsctx, NULL, dns_servers);
if (err) {
LOG_ERR("Could not set DNS servers: %d", err);
}
LOG_DBG("DNS resolver reconfigured");
#endif
}
/* +CIPDNS:enable[,"DNS IP1"[,"DNS IP2"[,"DNS IP3"]]] */
MODEM_CMD_DEFINE(on_cmd_cipdns)
{
#if defined(ESP_MAX_DNS)
struct esp_data *dev = CONTAINER_OF(data, struct esp_data,
cmd_handler_data);
struct sockaddr_in *addrs = dev->dns_addresses;
char **servers = (char **)argv + 1;
size_t num_servers = argc - 1;
size_t valid_servers = 0;
size_t i;
int err;
for (i = 0; i < ESP_MAX_DNS; i++) {
if (i >= num_servers) {
addrs[i].sin_addr.s_addr = 0;
break;
}
servers[i] = str_unquote(servers[i]);
LOG_DBG("DNS[%zu]: %s", i, servers[i]);
err = net_addr_pton(AF_INET, servers[i], &addrs[i].sin_addr);
if (err) {
LOG_ERR("Invalid DNS address: %s",
servers[i]);
addrs[i].sin_addr.s_addr = 0;
break;
}
addrs[i].sin_family = AF_INET;
addrs[i].sin_port = htons(53);
valid_servers++;
}
if (valid_servers) {
k_work_submit(&dev->dns_work);
}
#endif
return 0;
}
static const struct modem_cmd response_cmds[] = {
MODEM_CMD("OK", on_cmd_ok, 0U, ""), /* 3GPP */
MODEM_CMD("ERROR", on_cmd_error, 0U, ""), /* 3GPP */
};
MODEM_CMD_DEFINE(on_cmd_wifi_connected)
{
struct esp_data *dev = CONTAINER_OF(data, struct esp_data,
cmd_handler_data);
if (esp_flags_are_set(dev, EDF_STA_CONNECTED)) {
return 0;
}
esp_flags_set(dev, EDF_STA_CONNECTED);
wifi_mgmt_raise_connect_result_event(dev->net_iface, 0);
net_if_dormant_off(dev->net_iface);
return 0;
}
static void esp_mgmt_disconnect_work(struct k_work *work)
{
struct esp_socket *sock;
struct esp_data *dev;
dev = CONTAINER_OF(work, struct esp_data, disconnect_work);
/* Cleanup any sockets that weren't closed */
for (int i = 0; i < ARRAY_SIZE(dev->sockets); i++) {
sock = &dev->sockets[i];
if (esp_socket_connected(sock)) {
LOG_WRN("Socket %d left open, manually closing", i);
esp_socket_close(sock);
}
}
esp_flags_clear(dev, EDF_STA_CONNECTED);
esp_mode_switch_submit_if_needed(dev);
#if defined(CONFIG_NET_NATIVE_IPV4)
net_if_ipv4_addr_rm(dev->net_iface, &dev->ip);
#endif
if (!esp_flags_are_set(dev, EDF_AP_ENABLED)) {
net_if_dormant_on(dev->net_iface);
}
wifi_mgmt_raise_disconnect_result_event(dev->net_iface, 0);
}
MODEM_CMD_DEFINE(on_cmd_wifi_disconnected)
{
struct esp_data *dev = CONTAINER_OF(data, struct esp_data,
cmd_handler_data);
if (esp_flags_are_set(dev, EDF_STA_CONNECTED)) {
k_work_submit_to_queue(&dev->workq, &dev->disconnect_work);
}
return 0;
}
/*
* +CIPSTA:ip:"<ip>"
* +CIPSTA:gateway:"<ip>"
* +CIPSTA:netmask:"<ip>"
*/
MODEM_CMD_DEFINE(on_cmd_cipsta)
{
struct esp_data *dev = CONTAINER_OF(data, struct esp_data,
cmd_handler_data);
char *ip;
ip = str_unquote(argv[1]);
if (!strcmp(argv[0], "ip")) {
net_addr_pton(AF_INET, ip, &dev->ip);
} else if (!strcmp(argv[0], "gateway")) {
net_addr_pton(AF_INET, ip, &dev->gw);
} else if (!strcmp(argv[0], "netmask")) {
net_addr_pton(AF_INET, ip, &dev->nm);
} else {
LOG_WRN("Unknown IP type %s", argv[0]);
}
return 0;
}
static void esp_ip_addr_work(struct k_work *work)
{
struct k_work_delayable *dwork = k_work_delayable_from_work(work);
struct esp_data *dev = CONTAINER_OF(dwork, struct esp_data,
ip_addr_work);
int ret;
static const struct modem_cmd cmds[] = {
MODEM_CMD("+"_CIPSTA":", on_cmd_cipsta, 2U, ":"),
};
static const struct modem_cmd dns_cmds[] = {
MODEM_CMD_ARGS_MAX("+CIPDNS:", on_cmd_cipdns, 1U, 3U, ","),
};
ret = esp_cmd_send(dev, cmds, ARRAY_SIZE(cmds), "AT+"_CIPSTA"?",
ESP_CMD_TIMEOUT);
if (ret < 0) {
LOG_WRN("Failed to query IP settings: ret %d", ret);
k_work_reschedule_for_queue(&dev->workq, &dev->ip_addr_work,
K_SECONDS(5));
return;
}
#if defined(CONFIG_NET_NATIVE_IPV4)
/* update interface addresses */
#if defined(CONFIG_WIFI_ESP_AT_IP_STATIC)
net_if_ipv4_addr_add(dev->net_iface, &dev->ip, NET_ADDR_MANUAL, 0);
#else
net_if_ipv4_addr_add(dev->net_iface, &dev->ip, NET_ADDR_DHCP, 0);
#endif
net_if_ipv4_set_gw(dev->net_iface, &dev->gw);
net_if_ipv4_set_netmask_by_addr(dev->net_iface, &dev->ip, &dev->nm);
#endif
if (IS_ENABLED(CONFIG_WIFI_ESP_AT_DNS_USE)) {
ret = esp_cmd_send(dev, dns_cmds, ARRAY_SIZE(dns_cmds),
"AT+CIPDNS?", ESP_CMD_TIMEOUT);
if (ret) {
LOG_WRN("DNS fetch failed: %d", ret);
}
}
}
MODEM_CMD_DEFINE(on_cmd_got_ip)
{
struct esp_data *dev = CONTAINER_OF(data, struct esp_data,
cmd_handler_data);
k_work_reschedule_for_queue(&dev->workq, &dev->ip_addr_work,
K_SECONDS(1));
return 0;
}
MODEM_CMD_DEFINE(on_cmd_connect)
{
struct esp_socket *sock;
struct esp_data *dev;
uint8_t link_id;
link_id = data->match_buf[0] - '0';
dev = CONTAINER_OF(data, struct esp_data, cmd_handler_data);
sock = esp_socket_ref_from_link_id(dev, link_id);
if (!sock) {
LOG_ERR("No socket for link %d", link_id);
return 0;
}
esp_socket_unref(sock);
return 0;
}
MODEM_CMD_DEFINE(on_cmd_closed)
{
struct esp_socket *sock;
struct esp_data *dev;
uint8_t link_id;
atomic_val_t old_flags;
link_id = data->match_buf[0] - '0';
LOG_DBG("Link %d closed", link_id);
dev = CONTAINER_OF(data, struct esp_data, cmd_handler_data);
sock = esp_socket_ref_from_link_id(dev, link_id);
if (!sock) {
LOG_ERR("No socket for link %d", link_id);
return 0;
}
old_flags = esp_socket_flags_clear_and_set(sock,
ESP_SOCK_CONNECTED, ESP_SOCK_CLOSE_PENDING);
if (!(old_flags & ESP_SOCK_CONNECTED)) {
LOG_DBG("Link %d already closed", link_id);
goto socket_unref;
}
if (!(old_flags & ESP_SOCK_CLOSE_PENDING)) {
esp_socket_work_submit(sock, &sock->close_work);
}
socket_unref:
esp_socket_unref(sock);
return 0;
}
/*
* Passive mode: "+IPD,<id>,<len>\r\n"
* Other: "+IPD,<id>,<len>:<data>"
*/
#define MIN_IPD_LEN (sizeof("+IPD,I,0E") - 1)
#define MAX_IPD_LEN (sizeof("+IPD,I,4294967295,\"\",65535E") - 1) + NET_IPV4_ADDR_LEN
static int cmd_ipd_parse_hdr(struct esp_data *dev,
struct esp_socket **sock,
struct net_buf *buf, uint16_t len,
int *data_offset, long *data_len)
{
char ipd_buf[MAX_IPD_LEN + 1];
char *str;
char *str_end;
long link_id;
size_t frags_len;
size_t match_len;
int err;
frags_len = net_buf_frags_len(buf);
/* Wait until minimum cmd length is available */
if (frags_len < MIN_IPD_LEN) {
return -EAGAIN;
}
match_len = net_buf_linearize(ipd_buf, MAX_IPD_LEN,
buf, 0, MAX_IPD_LEN);
ipd_buf[match_len] = 0;
if (ipd_buf[len] != ',' || ipd_buf[len + 2] != ',') {
LOG_ERR("Invalid IPD: %s", ipd_buf);
return -EBADMSG;
}
str = &ipd_buf[len + 1];
str_end = &ipd_buf[match_len];
err = esp_pull_long(&str, str_end, &link_id);
if (err) {
if (err == -EAGAIN && match_len >= MAX_IPD_LEN) {
LOG_ERR("Failed to pull %s", "link_id");
return -EBADMSG;
}
return err;
}
err = esp_pull_long(&str, str_end, data_len);
if (err) {
if (err == -EAGAIN && match_len >= MAX_IPD_LEN) {
LOG_ERR("Failed to pull %s", "data_len");
return -EBADMSG;
}
return err;
}
*sock = esp_socket_ref_from_link_id(dev, link_id);
if (!*sock) {
LOG_ERR("No socket for link %ld", link_id);
*data_offset = (str - ipd_buf);
return -ENOTCONN;
}
if (!ESP_PROTO_PASSIVE(esp_socket_ip_proto(*sock)) &&
IS_ENABLED(CONFIG_WIFI_ESP_AT_CIPDINFO_USE)) {
struct sockaddr_in *recv_addr =
(struct sockaddr_in *) &(*sock)->context->remote;
char *remote_ip;
long port;
if (IS_ENABLED(CONFIG_WIFI_ESP_AT_VERSION_1_7)) {
/* NOT quoted per AT version 1.7.0 */
err = esp_pull_raw(&str, str_end, &remote_ip);
} else {
/* Quoted per AT version 2.1.0/2.2.0 */
err = esp_pull_quoted(&str, str_end, &remote_ip);
}
if (err) {
if (err == -EAGAIN && match_len >= MAX_IPD_LEN) {
LOG_ERR("Failed to pull remote_ip");
err = -EBADMSG;
}
goto socket_unref;
}
err = esp_pull_long(&str, str_end, &port);
if (err) {
if (err == -EAGAIN && match_len >= MAX_IPD_LEN) {
LOG_ERR("Failed to pull port");
err = -EBADMSG;
}
goto socket_unref;
}
err = net_addr_pton(AF_INET, remote_ip, &recv_addr->sin_addr);
if (err) {
LOG_ERR("Invalid IP address");
err = -EBADMSG;
goto socket_unref;
}
recv_addr->sin_family = AF_INET;
recv_addr->sin_port = htons(port);
}
*data_offset = (str - ipd_buf);
return 0;
socket_unref:
esp_socket_unref(*sock);
return err;
}
MODEM_CMD_DIRECT_DEFINE(on_cmd_ipd)
{
struct esp_data *dev = CONTAINER_OF(data, struct esp_data,
cmd_handler_data);
struct esp_socket *sock;
int data_offset;
long data_len;
int err;
int ret;
err = cmd_ipd_parse_hdr(dev, &sock, data->rx_buf, len,
&data_offset, &data_len);
if (err) {
if (err == -EAGAIN) {
return -EAGAIN;
}
return len;
}
/*
* When using passive TCP, the data itself is not included in the +IPD
* command but must be polled with AT+CIPRECVDATA.
*/
if (ESP_PROTO_PASSIVE(esp_socket_ip_proto(sock))) {
esp_socket_work_submit(sock, &sock->recvdata_work);
ret = data_offset;
goto socket_unref;
}
/* Do we have the whole message? */
if (data_offset + data_len > net_buf_frags_len(data->rx_buf)) {
ret = -EAGAIN;
goto socket_unref;
}
esp_socket_rx(sock, data->rx_buf, data_offset, data_len);
ret = data_offset + data_len;
socket_unref:
esp_socket_unref(sock);
return ret;
}
MODEM_CMD_DEFINE(on_cmd_busy_sending)
{
LOG_WRN("Busy sending");
return 0;
}
MODEM_CMD_DEFINE(on_cmd_busy_processing)
{
LOG_WRN("Busy processing");
return 0;
}
/*
* The 'ready' command is sent when device has booted and is ready to receive
* commands. It is only expected after a reset of the device.
*/
MODEM_CMD_DEFINE(on_cmd_ready)
{
struct esp_data *dev = CONTAINER_OF(data, struct esp_data,
cmd_handler_data);
k_sem_give(&dev->sem_if_ready);
if (net_if_is_carrier_ok(dev->net_iface)) {
net_if_dormant_on(dev->net_iface);
net_if_carrier_off(dev->net_iface);
LOG_ERR("Unexpected reset");
}
if (esp_flags_are_set(dev, EDF_STA_CONNECTING)) {
wifi_mgmt_raise_connect_result_event(dev->net_iface, -1);
} else if (esp_flags_are_set(dev, EDF_STA_CONNECTED)) {
wifi_mgmt_raise_disconnect_result_event(dev->net_iface, 0);
}
dev->flags = 0;
dev->mode = 0;
#if defined(CONFIG_NET_NATIVE_IPV4)
net_if_ipv4_addr_rm(dev->net_iface, &dev->ip);
#endif
k_work_submit_to_queue(&dev->workq, &dev->init_work);
return 0;
}
#if defined(CONFIG_WIFI_ESP_AT_FETCH_VERSION)
static int cmd_version_log(struct modem_cmd_handler_data *data,
const char *type, const char *version)
{
LOG_INF("%s: %s", type, version);
return 0;
}
MODEM_CMD_DEFINE(on_cmd_at_version)
{
return cmd_version_log(data, "AT version", argv[0]);
}
MODEM_CMD_DEFINE(on_cmd_sdk_version)
{
return cmd_version_log(data, "SDK version", argv[0]);
}
MODEM_CMD_DEFINE(on_cmd_compile_time)
{
return cmd_version_log(data, "compile time", argv[0]);
}
MODEM_CMD_DEFINE(on_cmd_bin_version)
{
return cmd_version_log(data, "Bin version", argv[0]);
}
#endif /* CONFIG_WIFI_ESP_AT_FETCH_VERSION */
static const struct modem_cmd unsol_cmds[] = {
MODEM_CMD("WIFI CONNECTED", on_cmd_wifi_connected, 0U, ""),
MODEM_CMD("WIFI DISCONNECT", on_cmd_wifi_disconnected, 0U, ""),
MODEM_CMD("WIFI GOT IP", on_cmd_got_ip, 0U, ""),