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zephyr/drivers/modem/ublox-sara-r4.c

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/*
* Copyright (c) 2019-2020 Foundries.io
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT ublox_sara_r4
#include <logging/log.h>
LOG_MODULE_REGISTER(modem_ublox_sara_r4, CONFIG_MODEM_LOG_LEVEL);
#include <kernel.h>
#include <ctype.h>
#include <errno.h>
#include <zephyr.h>
#include <drivers/gpio.h>
#include <device.h>
#include <init.h>
#include <net/net_if.h>
#include <net/net_offload.h>
#include <net/socket_offload.h>
#if defined(CONFIG_MODEM_UBLOX_SARA_AUTODETECT_APN)
#include <stdio.h>
#endif
#include "modem_context.h"
#include "modem_socket.h"
#include "modem_cmd_handler.h"
#include "modem_iface_uart.h"
#if !defined(CONFIG_MODEM_UBLOX_SARA_R4_MANUAL_MCCMNO)
#define CONFIG_MODEM_UBLOX_SARA_R4_MANUAL_MCCMNO ""
#endif
#if defined(CONFIG_NET_SOCKETS_SOCKOPT_TLS)
#include "tls_internal.h"
#include <net/tls_credentials.h>
#endif
/* pin settings */
enum mdm_control_pins {
MDM_POWER = 0,
MDM_RESET,
#if DT_INST_NODE_HAS_PROP(0, mdm_vint_gpios)
MDM_VINT,
#endif
};
static struct modem_pin modem_pins[] = {
/* MDM_POWER */
MODEM_PIN(DT_INST_GPIO_LABEL(0, mdm_power_gpios),
DT_INST_GPIO_PIN(0, mdm_power_gpios),
DT_INST_GPIO_FLAGS(0, mdm_power_gpios) | GPIO_OUTPUT),
/* MDM_RESET */
MODEM_PIN(DT_INST_GPIO_LABEL(0, mdm_reset_gpios),
DT_INST_GPIO_PIN(0, mdm_reset_gpios),
DT_INST_GPIO_FLAGS(0, mdm_reset_gpios) | GPIO_OUTPUT),
#if DT_INST_NODE_HAS_PROP(0, mdm_vint_gpios)
/* MDM_VINT */
MODEM_PIN(DT_INST_GPIO_LABEL(0, mdm_vint_gpios),
DT_INST_GPIO_PIN(0, mdm_vint_gpios),
DT_INST_GPIO_FLAGS(0, mdm_vint_gpios) | GPIO_INPUT),
#endif
};
#define MDM_UART_DEV_NAME DT_INST_BUS_LABEL(0)
#define MDM_UART_NODE DT_BUS(DT_DRV_INST(0))
#define MDM_POWER_ENABLE 1
#define MDM_POWER_DISABLE 0
#define MDM_RESET_NOT_ASSERTED 1
#define MDM_RESET_ASSERTED 0
#define MDM_CMD_TIMEOUT K_SECONDS(10)
#define MDM_DNS_TIMEOUT K_SECONDS(70)
#define MDM_CMD_CONN_TIMEOUT K_SECONDS(120)
#define MDM_REGISTRATION_TIMEOUT K_SECONDS(180)
#define MDM_PROMPT_CMD_DELAY K_MSEC(50)
#define MDM_MAX_DATA_LENGTH 1024
#define MDM_RECV_MAX_BUF 30
#define MDM_RECV_BUF_SIZE 128
#define MDM_MAX_SOCKETS 6
#define MDM_BASE_SOCKET_NUM 0
#define MDM_NETWORK_RETRY_COUNT 3
#define MDM_WAIT_FOR_RSSI_COUNT 10
#define MDM_WAIT_FOR_RSSI_DELAY K_SECONDS(2)
#define MDM_MANUFACTURER_LENGTH 10
#define MDM_MODEL_LENGTH 16
#define MDM_REVISION_LENGTH 64
#define MDM_IMEI_LENGTH 16
#define MDM_IMSI_LENGTH 16
#define MDM_APN_LENGTH 32
#define MDM_MAX_CERT_LENGTH 8192
#if defined(CONFIG_MODEM_UBLOX_SARA_AUTODETECT_VARIANT)
#define MDM_VARIANT_UBLOX_R4 4
#define MDM_VARIANT_UBLOX_U2 2
#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(modem_rx_stack,
CONFIG_MODEM_UBLOX_SARA_R4_RX_STACK_SIZE);
struct k_thread modem_rx_thread;
#if defined(CONFIG_MODEM_UBLOX_SARA_RSSI_WORK)
/* RX thread work queue */
K_KERNEL_STACK_DEFINE(modem_workq_stack,
CONFIG_MODEM_UBLOX_SARA_R4_RX_WORKQ_STACK_SIZE);
static struct k_work_q modem_workq;
#endif
/* socket read callback data */
struct socket_read_data {
char *recv_buf;
size_t recv_buf_len;
struct sockaddr *recv_addr;
uint16_t recv_read_len;
};
/* driver data */
struct modem_data {
struct net_if *net_iface;
uint8_t mac_addr[6];
/* modem interface */
struct modem_iface_uart_data iface_data;
uint8_t iface_rb_buf[MDM_MAX_DATA_LENGTH];
/* modem cmds */
struct modem_cmd_handler_data cmd_handler_data;
uint8_t cmd_match_buf[MDM_RECV_BUF_SIZE + 1];
/* socket data */
struct modem_socket_config socket_config;
struct modem_socket sockets[MDM_MAX_SOCKETS];
#if defined(CONFIG_MODEM_UBLOX_SARA_RSSI_WORK)
/* RSSI work */
struct k_work_delayable rssi_query_work;
#endif
/* modem data */
char mdm_manufacturer[MDM_MANUFACTURER_LENGTH];
char mdm_model[MDM_MODEL_LENGTH];
char mdm_revision[MDM_REVISION_LENGTH];
char mdm_imei[MDM_IMEI_LENGTH];
char mdm_imsi[MDM_IMSI_LENGTH];
#if defined(CONFIG_MODEM_UBLOX_SARA_AUTODETECT_VARIANT)
/* modem variant */
int mdm_variant;
#endif
#if defined(CONFIG_MODEM_UBLOX_SARA_AUTODETECT_APN)
/* APN */
char mdm_apn[MDM_APN_LENGTH];
#endif
/* modem state */
int ev_creg;
/* bytes written to socket in last transaction */
int sock_written;
/* response semaphore */
struct k_sem sem_response;
/* prompt semaphore */
struct k_sem sem_prompt;
};
static struct modem_data mdata;
static struct modem_context mctx;
#if defined(CONFIG_DNS_RESOLVER)
static struct zsock_addrinfo result;
static struct sockaddr result_addr;
static char result_canonname[DNS_MAX_NAME_SIZE + 1];
#endif
/* helper macro to keep readability */
#define ATOI(s_, value_, desc_) modem_atoi(s_, value_, desc_, __func__)
/**
* @brief Convert string to long integer, but handle errors
*
* @param s: string with representation of integer number
* @param err_value: on error return this value instead
* @param desc: name the string being converted
* @param func: function where this is called (typically __func__)
*
* @retval return integer conversion on success, or err_value on error
*/
static int modem_atoi(const char *s, const int err_value,
const char *desc, const char *func)
{
int ret;
char *endptr;
ret = (int)strtol(s, &endptr, 10);
if (!endptr || *endptr != '\0') {
LOG_ERR("bad %s '%s' in %s", log_strdup(s), log_strdup(desc),
log_strdup(func));
return err_value;
}
return ret;
}
#if defined(CONFIG_MODEM_UBLOX_SARA_AUTODETECT_APN)
/* the list of SIM profiles. Global scope, so the app can change it */
const char *modem_sim_profiles =
CONFIG_MODEM_UBLOX_SARA_AUTODETECT_APN_PROFILES;
int find_apn(char *apn, int apnlen, const char *profiles, const char *imsi)
{
int rc = -1;
/* try to find a match */
char *s = strstr(profiles, imsi);
if (s) {
char *eos;
/* find the assignment operator preceding the match */
while (s >= profiles && !strchr("=", *s)) {
s--;
}
/* find the apn preceding the assignment operator */
while (s >= profiles && strchr(" =", *s)) {
s--;
}
/* mark end of apn string */
eos = s+1;
/* find first character of the apn */
while (s >= profiles && !strchr(" ,", *s)) {
s--;
}
s++;
/* copy the key */
if (s >= profiles) {
int len = eos - s;
if (len < apnlen) {
memcpy(apn, s, len);
apn[len] = '\0';
rc = 0;
} else {
LOG_ERR("buffer overflow");
}
}
}
return rc;
}
/* try to detect APN automatically, based on IMSI */
int modem_detect_apn(const char *imsi)
{
int rc = -1;
if (imsi != NULL && strlen(imsi) >= 5) {
/* extract MMC and MNC from IMSI */
char mmcmnc[6];
*mmcmnc = 0;
strncat(mmcmnc, imsi, sizeof(mmcmnc)-1);
/* try to find a matching IMSI, and assign the APN */
rc = find_apn(mdata.mdm_apn,
sizeof(mdata.mdm_apn),
modem_sim_profiles,
mmcmnc);
if (rc < 0) {
rc = find_apn(mdata.mdm_apn,
sizeof(mdata.mdm_apn),
modem_sim_profiles,
"*");
}
}
if (rc == 0) {
LOG_INF("Assign APN: \"%s\"", log_strdup(mdata.mdm_apn));
}
return rc;
}
#endif
/* Forward declaration */
MODEM_CMD_DEFINE(on_cmd_sockwrite);
/* send binary data via the +USO[ST/WR] commands */
static ssize_t send_socket_data(void *obj,
const struct msghdr *msg,
k_timeout_t timeout)
{
int ret;
char send_buf[sizeof("AT+USO**=#,!###.###.###.###!,#####,####\r\n")];
uint16_t dst_port = 0U;
struct modem_socket *sock = (struct modem_socket *)obj;
const struct modem_cmd handler_cmds[] = {
MODEM_CMD("+USOST: ", on_cmd_sockwrite, 2U, ","),
MODEM_CMD("+USOWR: ", on_cmd_sockwrite, 2U, ","),
};
struct sockaddr *dst_addr = msg->msg_name;
size_t buf_len = 0;
if (!sock) {
return -EINVAL;
}
for (int i = 0; i < msg->msg_iovlen; i++) {
if (!msg->msg_iov[i].iov_base || msg->msg_iov[i].iov_len == 0) {
errno = EINVAL;
return -1;
}
buf_len += msg->msg_iov[i].iov_len;
}
if (!sock->is_connected && sock->ip_proto != IPPROTO_UDP) {
errno = ENOTCONN;
return -1;
}
if (!dst_addr && sock->ip_proto == IPPROTO_UDP) {
dst_addr = &sock->dst;
}
/*
* Binary and ASCII mode allows sending MDM_MAX_DATA_LENGTH bytes to
* the socket in one command
*/
if (buf_len > MDM_MAX_DATA_LENGTH) {
buf_len = MDM_MAX_DATA_LENGTH;
}
/* The number of bytes written will be reported by the modem */
mdata.sock_written = 0;
if (sock->ip_proto == IPPROTO_UDP) {
ret = modem_context_get_addr_port(dst_addr, &dst_port);
snprintk(send_buf, sizeof(send_buf),
"AT+USOST=%d,\"%s\",%u,%zu", sock->id,
modem_context_sprint_ip_addr(dst_addr),
dst_port, buf_len);
} else {
snprintk(send_buf, sizeof(send_buf), "AT+USOWR=%d,%zu",
sock->id, buf_len);
}
k_sem_take(&mdata.cmd_handler_data.sem_tx_lock, K_FOREVER);
/* Reset prompt '@' semaphore */
k_sem_reset(&mdata.sem_prompt);
ret = modem_cmd_send_nolock(&mctx.iface, &mctx.cmd_handler,
NULL, 0U, send_buf, NULL, K_NO_WAIT);
if (ret < 0) {
goto exit;
}
/* set command handlers */
ret = modem_cmd_handler_update_cmds(&mdata.cmd_handler_data,
handler_cmds,
ARRAY_SIZE(handler_cmds),
true);
if (ret < 0) {
goto exit;
}
/* Wait for prompt '@' */
ret = k_sem_take(&mdata.sem_prompt, K_SECONDS(1));
if (ret != 0) {
ret = -ETIMEDOUT;
LOG_ERR("No @ prompt received");
goto exit;
}
/*
* The AT commands manual requires a 50 ms wait
* after '@' prompt if using AT+USOWR, but not
* if using AT+USOST. This if condition is matched with
* the command selection above.
*/
if (sock->ip_proto != IPPROTO_UDP) {
k_sleep(MDM_PROMPT_CMD_DELAY);
}
/* Reset response semaphore before sending data
* So that we are sure that we won't use a previously pending one
* And we won't miss the one that is going to be freed
*/
k_sem_reset(&mdata.sem_response);
/* Send data directly on modem iface */
for (int i = 0; i < msg->msg_iovlen; i++) {
int len = MIN(buf_len, msg->msg_iov[i].iov_len);
if (len == 0) {
break;
}
mctx.iface.write(&mctx.iface, msg->msg_iov[i].iov_base, len);
buf_len -= len;
}
if (K_TIMEOUT_EQ(timeout, K_NO_WAIT)) {
ret = 0;
goto exit;
}
ret = k_sem_take(&mdata.sem_response, timeout);
if (ret == 0) {
ret = modem_cmd_handler_get_error(&mdata.cmd_handler_data);
} else if (ret == -EAGAIN) {
ret = -ETIMEDOUT;
}
exit:
/* unset handler commands and ignore any errors */
(void)modem_cmd_handler_update_cmds(&mdata.cmd_handler_data,
NULL, 0U, false);
k_sem_give(&mdata.cmd_handler_data.sem_tx_lock);
if (ret < 0) {
return ret;
}
return mdata.sock_written;
}
#if defined(CONFIG_NET_SOCKETS_SOCKOPT_TLS)
/* send binary data via the +USO[ST/WR] commands */
static ssize_t send_cert(struct modem_socket *sock,
struct modem_cmd *handler_cmds,
size_t handler_cmds_len,
const char *cert_data, size_t cert_len,
int cert_type)
{
int ret;
char *filename = "ca";
char send_buf[sizeof("AT+USECMNG=#,#,!####!,####\r\n")];
/* TODO support other cert types as well */
if (cert_type != 0) {
return -EINVAL;
}
if (!sock) {
return -EINVAL;
}
__ASSERT_NO_MSG(cert_len <= MDM_MAX_CERT_LENGTH);
snprintk(send_buf, sizeof(send_buf),
"AT+USECMNG=0,%d,\"%s\",%d", cert_type, filename, cert_len);
k_sem_take(&mdata.cmd_handler_data.sem_tx_lock, K_FOREVER);
ret = modem_cmd_send_nolock(&mctx.iface, &mctx.cmd_handler,
NULL, 0U, send_buf, NULL, K_NO_WAIT);
if (ret < 0) {
goto exit;
}
/* set command handlers */
ret = modem_cmd_handler_update_cmds(&mdata.cmd_handler_data,
handler_cmds, handler_cmds_len,
true);
if (ret < 0) {
goto exit;
}
/* slight pause per spec so that @ prompt is received */
k_sleep(MDM_PROMPT_CMD_DELAY);
mctx.iface.write(&mctx.iface, cert_data, cert_len);
k_sem_reset(&mdata.sem_response);
ret = k_sem_take(&mdata.sem_response, K_MSEC(1000));
if (ret == 0) {
ret = modem_cmd_handler_get_error(&mdata.cmd_handler_data);
} else if (ret == -EAGAIN) {
ret = -ETIMEDOUT;
}
exit:
/* unset handler commands and ignore any errors */
(void)modem_cmd_handler_update_cmds(&mdata.cmd_handler_data,
NULL, 0U, false);
k_sem_give(&mdata.cmd_handler_data.sem_tx_lock);
return ret;
}
#endif
/*
* Modem Response Command Handlers
*/
/* Handler: OK */
MODEM_CMD_DEFINE(on_cmd_ok)
{
modem_cmd_handler_set_error(data, 0);
k_sem_give(&mdata.sem_response);
return 0;
}
/* Handler: @ */
MODEM_CMD_DEFINE(on_prompt)
{
k_sem_give(&mdata.sem_prompt);
/* A direct cmd should return the number of byte processed.
* Therefore, here we always return 1
*/
return 1;
}
/* Handler: ERROR */
MODEM_CMD_DEFINE(on_cmd_error)
{
modem_cmd_handler_set_error(data, -EIO);
k_sem_give(&mdata.sem_response);
return 0;
}
/* Handler: +CME Error: <err>[0] */
MODEM_CMD_DEFINE(on_cmd_exterror)
{
/* TODO: map extended error codes to values */
modem_cmd_handler_set_error(data, -EIO);
k_sem_give(&mdata.sem_response);
return 0;
}
/*
* Modem Info Command Handlers
*/
/* Handler: <manufacturer> */
MODEM_CMD_DEFINE(on_cmd_atcmdinfo_manufacturer)
{
size_t out_len;
out_len = net_buf_linearize(mdata.mdm_manufacturer,
sizeof(mdata.mdm_manufacturer) - 1,
data->rx_buf, 0, len);
mdata.mdm_manufacturer[out_len] = '\0';
LOG_INF("Manufacturer: %s", log_strdup(mdata.mdm_manufacturer));
return 0;
}
/* Handler: <model> */
MODEM_CMD_DEFINE(on_cmd_atcmdinfo_model)
{
size_t out_len;
out_len = net_buf_linearize(mdata.mdm_model,
sizeof(mdata.mdm_model) - 1,
data->rx_buf, 0, len);
mdata.mdm_model[out_len] = '\0';
LOG_INF("Model: %s", log_strdup(mdata.mdm_model));
#if defined(CONFIG_MODEM_UBLOX_SARA_AUTODETECT_VARIANT)
/* Set modem type */
if (strstr(mdata.mdm_model, "R4")) {
mdata.mdm_variant = MDM_VARIANT_UBLOX_R4;
} else {
if (strstr(mdata.mdm_model, "U2")) {
mdata.mdm_variant = MDM_VARIANT_UBLOX_U2;
}
}
LOG_INF("Variant: %d", mdata.mdm_variant);
#endif
return 0;
}
/* Handler: <rev> */
MODEM_CMD_DEFINE(on_cmd_atcmdinfo_revision)
{
size_t out_len;
out_len = net_buf_linearize(mdata.mdm_revision,
sizeof(mdata.mdm_revision) - 1,
data->rx_buf, 0, len);
mdata.mdm_revision[out_len] = '\0';
LOG_INF("Revision: %s", log_strdup(mdata.mdm_revision));
return 0;
}
/* Handler: <IMEI> */
MODEM_CMD_DEFINE(on_cmd_atcmdinfo_imei)
{
size_t out_len;
out_len = net_buf_linearize(mdata.mdm_imei, sizeof(mdata.mdm_imei) - 1,
data->rx_buf, 0, len);
mdata.mdm_imei[out_len] = '\0';
LOG_INF("IMEI: %s", log_strdup(mdata.mdm_imei));
return 0;
}
/* Handler: <IMSI> */
MODEM_CMD_DEFINE(on_cmd_atcmdinfo_imsi)
{
size_t out_len;
out_len = net_buf_linearize(mdata.mdm_imsi, sizeof(mdata.mdm_imsi) - 1,
data->rx_buf, 0, len);
mdata.mdm_imsi[out_len] = '\0';
LOG_INF("IMSI: %s", log_strdup(mdata.mdm_imsi));
#if defined(CONFIG_MODEM_UBLOX_SARA_AUTODETECT_APN)
/* set the APN automatically */
modem_detect_apn(mdata.mdm_imsi);
#endif
return 0;
}
#if !defined(CONFIG_MODEM_UBLOX_SARA_U2)
/*
* Handler: +CESQ: <rxlev>[0],<ber>[1],<rscp>[2],<ecn0>[3],<rsrq>[4],<rsrp>[5]
*/
MODEM_CMD_DEFINE(on_cmd_atcmdinfo_rssi_cesq)
{
int rsrp, rxlev;
rsrp = ATOI(argv[5], 0, "rsrp");
rxlev = ATOI(argv[0], 0, "rxlev");
if (rsrp >= 0 && rsrp <= 97) {
mctx.data_rssi = -140 + (rsrp - 1);
LOG_INF("RSRP: %d", mctx.data_rssi);
} else if (rxlev >= 0 && rxlev <= 63) {
mctx.data_rssi = -110 + (rxlev - 1);
LOG_INF("RSSI: %d", mctx.data_rssi);
} else {
mctx.data_rssi = -1000;
LOG_INF("RSRP/RSSI not known");
}
return 0;
}
#endif
#if defined(CONFIG_MODEM_UBLOX_SARA_U2) \
|| defined(CONFIG_MODEM_UBLOX_SARA_AUTODETECT_VARIANT)
/* Handler: +CSQ: <signal_power>[0],<qual>[1] */
MODEM_CMD_DEFINE(on_cmd_atcmdinfo_rssi_csq)
{
int rssi;
rssi = ATOI(argv[0], 0, "signal_power");
if (rssi == 31) {
mctx.data_rssi = -46;
} else if (rssi >= 0 && rssi <= 31) {
/* FIXME: This value depends on the RAT */
mctx.data_rssi = -110 + ((rssi * 2) + 1);
} else {
mctx.data_rssi = -1000;
}
LOG_INF("RSSI: %d", mctx.data_rssi);
return 0;
}
#endif
/*
* Modem Socket Command Handlers
*/
/* Handler: +USOCR: <socket_id>[0] */
MODEM_CMD_DEFINE(on_cmd_sockcreate)
{
struct modem_socket *sock = NULL;
/* look up new socket by special id */
sock = modem_socket_from_newid(&mdata.socket_config);
if (sock) {
sock->id = ATOI(argv[0],
mdata.socket_config.base_socket_num - 1,
"socket_id");
/* on error give up modem socket */
if (sock->id == mdata.socket_config.base_socket_num - 1) {
modem_socket_put(&mdata.socket_config, sock->sock_fd);
}
}
/* don't give back semaphore -- OK to follow */
return 0;
}
/* Handler: +USO[WR|ST]: <socket_id>[0],<length>[1] */
MODEM_CMD_DEFINE(on_cmd_sockwrite)
{
mdata.sock_written = ATOI(argv[1], 0, "length");
LOG_DBG("bytes written: %d", mdata.sock_written);
return 0;
}
#if defined(CONFIG_NET_SOCKETS_SOCKOPT_TLS)
/* Handler: +USECMNG: 0,<type>[0],<internal_name>[1],<md5_string>[2] */
MODEM_CMD_DEFINE(on_cmd_cert_write)
{
LOG_DBG("cert md5: %s", log_strdup(argv[2]));
return 0;
}
#endif
/* Common code for +USOR[D|F]: "<data>" */
static int on_cmd_sockread_common(int socket_id,
struct modem_cmd_handler_data *data,
int socket_data_length, uint16_t len)
{
struct modem_socket *sock = NULL;
struct socket_read_data *sock_data;
int ret;
if (!len) {
LOG_ERR("Short +USOR[D|F] value. Aborting!");
return -EAGAIN;
}
/*
* make sure we still have buf data and next char in the buffer is a
* quote.
*/
if (!data->rx_buf || *data->rx_buf->data != '\"') {
LOG_ERR("Incorrect format! Ignoring data!");
return -EINVAL;
}
/* zero length */
if (socket_data_length <= 0) {
LOG_ERR("Length problem (%d). Aborting!", socket_data_length);
return -EAGAIN;
}
/* check to make sure we have all of the data (minus quotes) */
if ((net_buf_frags_len(data->rx_buf) - 2) < socket_data_length) {
LOG_DBG("Not enough data -- wait!");
return -EAGAIN;
}
/* skip quote */
len--;
net_buf_pull_u8(data->rx_buf);
if (!data->rx_buf->len) {
data->rx_buf = net_buf_frag_del(NULL, data->rx_buf);
}
sock = modem_socket_from_id(&mdata.socket_config, socket_id);
if (!sock) {
LOG_ERR("Socket not found! (%d)", socket_id);
ret = -EINVAL;
goto exit;
}
sock_data = (struct socket_read_data *)sock->data;
if (!sock_data) {
LOG_ERR("Socket data not found! Skip handling (%d)", socket_id);
ret = -EINVAL;
goto exit;
}
ret = net_buf_linearize(sock_data->recv_buf, sock_data->recv_buf_len,
data->rx_buf, 0, (uint16_t)socket_data_length);
data->rx_buf = net_buf_skip(data->rx_buf, ret);
sock_data->recv_read_len = ret;
if (ret != socket_data_length) {
LOG_ERR("Total copied data is different then received data!"
" copied:%d vs. received:%d", ret, socket_data_length);
ret = -EINVAL;
}
exit:
/* remove packet from list (ignore errors) */
(void)modem_socket_packet_size_update(&mdata.socket_config, sock,
-socket_data_length);
/* don't give back semaphore -- OK to follow */
return ret;
}
/*
* Handler: +USORF: <socket_id>[0],<remote_ip_addr>[1],<remote_port>[2],
* <length>[3],"<data>"
*/
MODEM_CMD_DEFINE(on_cmd_sockreadfrom)
{
/* TODO: handle remote_ip_addr */
return on_cmd_sockread_common(ATOI(argv[0], 0, "socket_id"), data,
ATOI(argv[3], 0, "length"), len);
}
/* Handler: +USORD: <socket_id>[0],<length>[1],"<data>" */
MODEM_CMD_DEFINE(on_cmd_sockread)
{
return on_cmd_sockread_common(ATOI(argv[0], 0, "socket_id"), data,
ATOI(argv[1], 0, "length"), len);
}
#if defined(CONFIG_DNS_RESOLVER)
/* Handler: +UDNSRN: "<resolved_ip_address>"[0], "<resolved_ip_address>"[1] */
MODEM_CMD_DEFINE(on_cmd_dns)
{
/* chop off end quote */
argv[0][strlen(argv[0]) - 1] = '\0';
/* FIXME: Hard-code DNS on SARA-R4 to return IPv4 */
result_addr.sa_family = AF_INET;
/* skip beginning quote when parsing */
(void)net_addr_pton(result.ai_family, &argv[0][1],
&((struct sockaddr_in *)&result_addr)->sin_addr);
return 0;
}
#endif
/*
* MODEM UNSOLICITED NOTIFICATION HANDLERS
*/
/* Handler: +UUSOCL: <socket_id>[0] */
MODEM_CMD_DEFINE(on_cmd_socknotifyclose)
{
struct modem_socket *sock;
sock = modem_socket_from_id(&mdata.socket_config,
ATOI(argv[0], 0, "socket_id"));
if (sock) {
sock->is_connected = false;
}
return 0;
}
/* Handler: +UUSOR[D|F]: <socket_id>[0],<length>[1] */
MODEM_CMD_DEFINE(on_cmd_socknotifydata)
{
int ret, socket_id, new_total;
struct modem_socket *sock;
socket_id = ATOI(argv[0], 0, "socket_id");
new_total = ATOI(argv[1], 0, "length");
sock = modem_socket_from_id(&mdata.socket_config, socket_id);
if (!sock) {
return 0;
}
ret = modem_socket_packet_size_update(&mdata.socket_config, sock,
new_total);
if (ret < 0) {
LOG_ERR("socket_id:%d left_bytes:%d err: %d", socket_id,
new_total, ret);
}
if (new_total > 0) {
modem_socket_data_ready(&mdata.socket_config, sock);
}
return 0;
}
/* Handler: +CREG: <stat>[0] */
MODEM_CMD_DEFINE(on_cmd_socknotifycreg)
{
mdata.ev_creg = ATOI(argv[0], 0, "stat");
LOG_DBG("CREG:%d", mdata.ev_creg);
return 0;
}
/* RX thread */
static void modem_rx(void)
{
while (true) {
/* wait for incoming data */
k_sem_take(&mdata.iface_data.rx_sem, K_FOREVER);
mctx.cmd_handler.process(&mctx.cmd_handler, &mctx.iface);
/* give up time if we have a solid stream of data */
k_yield();
}
}
static int pin_init(void)
{
LOG_INF("Setting Modem Pins");
LOG_DBG("MDM_RESET_PIN -> NOT_ASSERTED");
modem_pin_write(&mctx, MDM_RESET, MDM_RESET_NOT_ASSERTED);
LOG_DBG("MDM_POWER_PIN -> ENABLE");
modem_pin_write(&mctx, MDM_POWER, MDM_POWER_ENABLE);
k_sleep(K_SECONDS(4));
LOG_DBG("MDM_POWER_PIN -> DISABLE");
modem_pin_write(&mctx, MDM_POWER, MDM_POWER_DISABLE);
#if defined(CONFIG_MODEM_UBLOX_SARA_U2)
k_sleep(K_SECONDS(1));
#else
k_sleep(K_SECONDS(4));
#endif
LOG_DBG("MDM_POWER_PIN -> ENABLE");
modem_pin_write(&mctx, MDM_POWER, MDM_POWER_ENABLE);
k_sleep(K_SECONDS(1));
/* make sure module is powered off */
#if DT_INST_NODE_HAS_PROP(0, mdm_vint_gpios)
LOG_DBG("Waiting for MDM_VINT_PIN = 0");
while (modem_pin_read(&mctx, MDM_VINT) > 0) {
#if defined(CONFIG_MODEM_UBLOX_SARA_U2)
/* try to power off again */
LOG_DBG("MDM_POWER_PIN -> DISABLE");
modem_pin_write(&mctx, MDM_POWER, MDM_POWER_DISABLE);
k_sleep(K_SECONDS(1));
LOG_DBG("MDM_POWER_PIN -> ENABLE");
modem_pin_write(&mctx, MDM_POWER, MDM_POWER_ENABLE);
#endif
k_sleep(K_MSEC(100));
}
#else
k_sleep(K_SECONDS(8));
#endif
LOG_DBG("MDM_POWER_PIN -> DISABLE");
unsigned int irq_lock_key = irq_lock();
modem_pin_write(&mctx, MDM_POWER, MDM_POWER_DISABLE);
#if defined(CONFIG_MODEM_UBLOX_SARA_U2)
k_usleep(50); /* 50-80 microseconds */
#else
k_sleep(K_SECONDS(1));
#endif
modem_pin_write(&mctx, MDM_POWER, MDM_POWER_ENABLE);
irq_unlock(irq_lock_key);
LOG_DBG("MDM_POWER_PIN -> ENABLE");
#if DT_INST_NODE_HAS_PROP(0, mdm_vint_gpios)
LOG_DBG("Waiting for MDM_VINT_PIN = 1");
do {
k_sleep(K_MSEC(100));
} while (modem_pin_read(&mctx, MDM_VINT) == 0);
#else
k_sleep(K_SECONDS(10));
#endif
modem_pin_config(&mctx, MDM_POWER, false);
LOG_INF("... Done!");
return 0;
}
#if defined(CONFIG_MODEM_UBLOX_SARA_AUTODETECT_VARIANT)
static void modem_rssi_query_work(struct k_work *work)
{
static const struct modem_cmd cmds[] = {
MODEM_CMD("+CSQ: ", on_cmd_atcmdinfo_rssi_csq, 2U, ","),
MODEM_CMD("+CESQ: ", on_cmd_atcmdinfo_rssi_cesq, 6U, ","),
};
const char *send_cmd_u2 = "AT+CSQ";
const char *send_cmd_r4 = "AT+CESQ";
int ret;
/* choose cmd according to variant */
const char *send_cmd = send_cmd_r4;
if (mdata.mdm_variant == MDM_VARIANT_UBLOX_U2) {
send_cmd = send_cmd_u2;
}
/* query modem RSSI */
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler,
cmds, ARRAY_SIZE(cmds),
send_cmd,
&mdata.sem_response,
MDM_CMD_TIMEOUT);
if (ret < 0) {
LOG_ERR("AT+C[E]SQ ret:%d", ret);
}
#if defined(CONFIG_MODEM_UBLOX_SARA_RSSI_WORK)
/* re-start RSSI query work */
if (work) {
k_work_reschedule_for_queue(
&modem_workq, &mdata.rssi_query_work,
K_SECONDS(CONFIG_MODEM_UBLOX_SARA_RSSI_WORK_PERIOD));
}
#endif
}
#else
static void modem_rssi_query_work(struct k_work *work)
{
static const struct modem_cmd cmd =
#if defined(CONFIG_MODEM_UBLOX_SARA_U2)
MODEM_CMD("+CSQ: ", on_cmd_atcmdinfo_rssi_csq, 2U, ",");
static char *send_cmd = "AT+CSQ";
#else
MODEM_CMD("+CESQ: ", on_cmd_atcmdinfo_rssi_cesq, 6U, ",");
static char *send_cmd = "AT+CESQ";
#endif
int ret;
/* query modem RSSI */
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler,
&cmd, 1U, send_cmd, &mdata.sem_response,
MDM_CMD_TIMEOUT);
if (ret < 0) {
LOG_ERR("AT+C[E]SQ ret:%d", ret);
}
#if defined(CONFIG_MODEM_UBLOX_SARA_RSSI_WORK)
/* re-start RSSI query work */
if (work) {
k_work_reschedule_for_queue(
&modem_workq, &mdata.rssi_query_work,
K_SECONDS(CONFIG_MODEM_UBLOX_SARA_RSSI_WORK_PERIOD));
}
#endif
}
#endif
static void modem_reset(void)
{
int ret = 0, retry_count = 0, counter = 0;
static const struct setup_cmd setup_cmds[] = {
/* turn off echo */
SETUP_CMD_NOHANDLE("ATE0"),
/* stop functionality */
SETUP_CMD_NOHANDLE("AT+CFUN=0"),
/* extended error numbers */
SETUP_CMD_NOHANDLE("AT+CMEE=1"),
#if defined(CONFIG_BOARD_PARTICLE_BORON)
/* use external SIM */
SETUP_CMD_NOHANDLE("AT+UGPIOC=23,0,0"),
#endif
#if defined(CONFIG_MODEM_UBLOX_SARA_R4_NET_STATUS_PIN)
/* enable the network status indication */
SETUP_CMD_NOHANDLE("AT+UGPIOC="
STRINGIFY(CONFIG_MODEM_UBLOX_SARA_R4_NET_STATUS_PIN)
",2"),
#endif
/* UNC messages for registration */
SETUP_CMD_NOHANDLE("AT+CREG=1"),
/* query modem info */
SETUP_CMD("AT+CGMI", "", on_cmd_atcmdinfo_manufacturer, 0U, ""),
SETUP_CMD("AT+CGMM", "", on_cmd_atcmdinfo_model, 0U, ""),
SETUP_CMD("AT+CGMR", "", on_cmd_atcmdinfo_revision, 0U, ""),
SETUP_CMD("AT+CGSN", "", on_cmd_atcmdinfo_imei, 0U, ""),
SETUP_CMD("AT+CIMI", "", on_cmd_atcmdinfo_imsi, 0U, ""),
#if !defined(CONFIG_MODEM_UBLOX_SARA_AUTODETECT_APN)
/* setup PDP context definition */
SETUP_CMD_NOHANDLE("AT+CGDCONT=1,\"IP\",\""
CONFIG_MODEM_UBLOX_SARA_R4_APN "\""),
/* start functionality */
SETUP_CMD_NOHANDLE("AT+CFUN=1"),
#endif
};
#if defined(CONFIG_MODEM_UBLOX_SARA_AUTODETECT_VARIANT)
static const struct setup_cmd post_setup_cmds_u2[] = {
#if !defined(CONFIG_MODEM_UBLOX_SARA_AUTODETECT_APN)
/* set the APN */
SETUP_CMD_NOHANDLE("AT+UPSD=0,1,\""
CONFIG_MODEM_UBLOX_SARA_R4_APN "\""),
#endif
/* set dynamic IP */
SETUP_CMD_NOHANDLE("AT+UPSD=0,7,\"0.0.0.0\""),
/* activate the GPRS connection */
SETUP_CMD_NOHANDLE("AT+UPSDA=0,3"),
};
#endif
static const struct setup_cmd post_setup_cmds[] = {
#if defined(CONFIG_MODEM_UBLOX_SARA_U2)
/* set the APN */
SETUP_CMD_NOHANDLE("AT+UPSD=0,1,\""
CONFIG_MODEM_UBLOX_SARA_R4_APN "\""),
/* set dynamic IP */
SETUP_CMD_NOHANDLE("AT+UPSD=0,7,\"0.0.0.0\""),
/* activate the GPRS connection */
SETUP_CMD_NOHANDLE("AT+UPSDA=0,3"),
#else
/* activate the PDP context */
SETUP_CMD_NOHANDLE("AT+CGACT=1,1"),
#endif
};
restart:
#if defined(CONFIG_MODEM_UBLOX_SARA_AUTODETECT_APN)
mdata.mdm_apn[0] = '\0';
strncat(mdata.mdm_apn,
CONFIG_MODEM_UBLOX_SARA_R4_APN,
sizeof(mdata.mdm_apn)-1);
#endif
#if defined(CONFIG_MODEM_UBLOX_SARA_RSSI_WORK)
/* stop RSSI delay work */
k_work_cancel_delayable(&mdata.rssi_query_work);
#endif
pin_init();
LOG_INF("Waiting for modem to respond");
/* Give the modem a while to start responding to simple 'AT' commands.
* Also wait for CSPS=1 or RRCSTATE=1 notification
*/
ret = -1;
while (counter++ < 50 && ret < 0) {
k_sleep(K_SECONDS(2));
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler,
NULL, 0, "AT", &mdata.sem_response,
MDM_CMD_TIMEOUT);
if (ret < 0 && ret != -ETIMEDOUT) {
break;
}
}
if (ret < 0) {
LOG_ERR("MODEM WAIT LOOP ERROR: %d", ret);
goto error;
}
ret = modem_cmd_handler_setup_cmds(&mctx.iface, &mctx.cmd_handler,
setup_cmds, ARRAY_SIZE(setup_cmds),
&mdata.sem_response,
MDM_REGISTRATION_TIMEOUT);
if (ret < 0) {
goto error;
}
#if defined(CONFIG_MODEM_UBLOX_SARA_AUTODETECT_APN)
/* autodetect APN from IMSI */
char cmd[sizeof("AT+CGDCONT=1,\"IP\",\"\"")+MDM_APN_LENGTH];
snprintf(cmd, sizeof(cmd), "AT+CGDCONT=1,\"IP\",\"%s\"", mdata.mdm_apn);
/* setup PDP context definition */
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler,
NULL, 0,
(const char *)cmd,
&mdata.sem_response,
MDM_REGISTRATION_TIMEOUT);
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler,
NULL, 0,
"AT+CFUN=1",
&mdata.sem_response,
MDM_REGISTRATION_TIMEOUT);
#endif
if (strlen(CONFIG_MODEM_UBLOX_SARA_R4_MANUAL_MCCMNO) > 0) {
/* use manual MCC/MNO entry */
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler,
NULL, 0,
"AT+COPS=1,2,\""
CONFIG_MODEM_UBLOX_SARA_R4_MANUAL_MCCMNO
"\"",
&mdata.sem_response,
MDM_REGISTRATION_TIMEOUT);
} else {
/* register operator automatically */
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler,
NULL, 0, "AT+COPS=0,0",
&mdata.sem_response,
MDM_REGISTRATION_TIMEOUT);
}
if (ret < 0) {
LOG_ERR("AT+COPS ret:%d", ret);
goto error;
}
LOG_INF("Waiting for network");
/*
* TODO: A lot of this should be setup as a 3GPP module to handle
* basic connection to the network commands / polling
*/
/* wait for +CREG: 1(normal) or 5(roaming) */
counter = 0;
while (counter++ < 40 && mdata.ev_creg != 1 && mdata.ev_creg != 5) {
if (counter == 20) {
LOG_WRN("Force restart of RF functionality");
/* Disable RF temporarily */
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler,
NULL, 0, "AT+CFUN=0", &mdata.sem_response,
MDM_CMD_TIMEOUT);
k_sleep(K_SECONDS(1));
/* Enable RF */
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler,
NULL, 0, "AT+CFUN=1", &mdata.sem_response,
MDM_CMD_TIMEOUT);
}
k_sleep(K_SECONDS(1));
}
/* query modem RSSI */
modem_rssi_query_work(NULL);
k_sleep(MDM_WAIT_FOR_RSSI_DELAY);
counter = 0;
/* wait for RSSI < 0 and > -1000 */
while (counter++ < MDM_WAIT_FOR_RSSI_COUNT &&
(mctx.data_rssi >= 0 ||
mctx.data_rssi <= -1000)) {
modem_rssi_query_work(NULL);
k_sleep(MDM_WAIT_FOR_RSSI_DELAY);
}
if (mctx.data_rssi >= 0 || mctx.data_rssi <= -1000) {
retry_count++;
if (retry_count >= MDM_NETWORK_RETRY_COUNT) {
LOG_ERR("Failed network init. Too many attempts!");
ret = -ENETUNREACH;
goto error;
}
LOG_ERR("Failed network init. Restarting process.");
goto restart;
}
#if defined(CONFIG_MODEM_UBLOX_SARA_AUTODETECT_VARIANT)
if (mdata.mdm_variant == MDM_VARIANT_UBLOX_U2) {
#if defined(CONFIG_MODEM_UBLOX_SARA_AUTODETECT_APN)
/* setup PDP context definition */
char cmd[sizeof("AT+UPSD=0,1,\"%s\"")+MDM_APN_LENGTH];
snprintf(cmd, sizeof(cmd), "AT+UPSD=0,1,\"%s\"", mdata.mdm_apn);
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler,
NULL, 0,
(const char *)cmd,
&mdata.sem_response,
MDM_REGISTRATION_TIMEOUT);
#endif
ret = modem_cmd_handler_setup_cmds(&mctx.iface,
&mctx.cmd_handler,
post_setup_cmds_u2,
ARRAY_SIZE(post_setup_cmds_u2),
&mdata.sem_response,
MDM_REGISTRATION_TIMEOUT);
} else {
#endif
ret = modem_cmd_handler_setup_cmds(&mctx.iface,
&mctx.cmd_handler,
post_setup_cmds,
ARRAY_SIZE(post_setup_cmds),
&mdata.sem_response,
MDM_REGISTRATION_TIMEOUT);
#if defined(CONFIG_MODEM_UBLOX_SARA_AUTODETECT_VARIANT)
}
#endif
if (ret < 0) {
goto error;
}
LOG_INF("Network is ready.");
#if defined(CONFIG_MODEM_UBLOX_SARA_RSSI_WORK)
/* start RSSI query */
k_work_reschedule_for_queue(
&modem_workq, &mdata.rssi_query_work,
K_SECONDS(CONFIG_MODEM_UBLOX_SARA_RSSI_WORK_PERIOD));
#endif
error:
return;
}
/*
* generic socket creation function
* which can be called in bind() or connect()
*/
static int create_socket(struct modem_socket *sock, const struct sockaddr *addr)
{
int ret;
static const struct modem_cmd cmd =
MODEM_CMD("+USOCR: ", on_cmd_sockcreate, 1U, "");
char buf[sizeof("AT+USOCR=#,#####\r")];
uint16_t local_port = 0U, proto = 6U;
if (addr) {
if (addr->sa_family == AF_INET6) {
local_port = ntohs(net_sin6(addr)->sin6_port);
} else if (addr->sa_family == AF_INET) {
local_port = ntohs(net_sin(addr)->sin_port);
}
}
if (sock->ip_proto == IPPROTO_UDP) {
proto = 17U;
}
if (local_port > 0U) {
snprintk(buf, sizeof(buf), "AT+USOCR=%d,%u", proto, local_port);
} else {
snprintk(buf, sizeof(buf), "AT+USOCR=%d", proto);
}
/* create socket */
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler,
&cmd, 1U, buf,
&mdata.sem_response, MDM_CMD_TIMEOUT);
if (ret < 0) {
goto error;
}
if (sock->ip_proto == IPPROTO_TLS_1_2) {
char buf[sizeof("AT+USECPRF=#,#,#######\r")];
/* Enable socket security */
snprintk(buf, sizeof(buf), "AT+USOSEC=%d,1,%d", sock->id, sock->id);
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler, NULL, 0U, buf,
&mdata.sem_response, MDM_CMD_TIMEOUT);
if (ret < 0) {
goto error;
}
/* Reset the security profile */
snprintk(buf, sizeof(buf), "AT+USECPRF=%d", sock->id);
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler, NULL, 0U, buf,
&mdata.sem_response, MDM_CMD_TIMEOUT);
if (ret < 0) {
goto error;
}
/* Validate server cert against the CA. */
snprintk(buf, sizeof(buf), "AT+USECPRF=%d,0,1", sock->id);
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler, NULL, 0U, buf,
&mdata.sem_response, MDM_CMD_TIMEOUT);
if (ret < 0) {
goto error;
}
/* Use TLSv1.2 only */
snprintk(buf, sizeof(buf), "AT+USECPRF=%d,1,3", sock->id);
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler, NULL, 0U, buf,
&mdata.sem_response, MDM_CMD_TIMEOUT);
if (ret < 0) {
goto error;
}
/* Set root CA filename */
snprintk(buf, sizeof(buf), "AT+USECPRF=%d,3,\"ca\"", sock->id);
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler, NULL, 0U, buf,
&mdata.sem_response, MDM_CMD_TIMEOUT);
if (ret < 0) {
goto error;
}
}
errno = 0;
return 0;
error:
LOG_ERR("%s ret:%d", log_strdup(buf), ret);
modem_socket_put(&mdata.socket_config, sock->sock_fd);
errno = -ret;
return -1;
}
/*
* Socket Offload OPS
*/
static const struct socket_op_vtable offload_socket_fd_op_vtable;
static int offload_socket(int family, int type, int proto)
{
int ret;
/* defer modem's socket create call to bind() */
ret = modem_socket_get(&mdata.socket_config, family, type, proto);
if (ret < 0) {
errno = -ret;
return -1;
}
errno = 0;
return ret;
}
static int offload_close(void *obj)
{
struct modem_socket *sock = (struct modem_socket *)obj;
char buf[sizeof("AT+USOCL=#\r")];
int ret;
/* make sure we assigned an id */
if (sock->id < mdata.socket_config.base_socket_num) {
return 0;
}
if (sock->is_connected || sock->ip_proto == IPPROTO_UDP) {
snprintk(buf, sizeof(buf), "AT+USOCL=%d", sock->id);
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler,
NULL, 0U, buf,
&mdata.sem_response, MDM_CMD_TIMEOUT);
if (ret < 0) {
LOG_ERR("%s ret:%d", log_strdup(buf), ret);
}
}
modem_socket_put(&mdata.socket_config, sock->sock_fd);
return 0;
}
static int offload_bind(void *obj, const struct sockaddr *addr,
socklen_t addrlen)
{
struct modem_socket *sock = (struct modem_socket *)obj;
/* save bind address information */
memcpy(&sock->src, addr, sizeof(*addr));
/* make sure we've created the socket */
if (sock->id == mdata.socket_config.sockets_len + 1) {
if (create_socket(sock, addr) < 0) {
return -1;
}
}
return 0;
}
static int offload_connect(void *obj, const struct sockaddr *addr,
socklen_t addrlen)
{
struct modem_socket *sock = (struct modem_socket *)obj;
int ret;
char buf[sizeof("AT+USOCO=#,!###.###.###.###!,#####,#\r")];
uint16_t dst_port = 0U;
if (!addr) {
errno = EINVAL;
return -1;
}
if (sock->id < mdata.socket_config.base_socket_num - 1) {
LOG_ERR("Invalid socket_id(%d) from fd:%d",
sock->id, sock->sock_fd);
errno = EINVAL;
return -1;
}
/* make sure we've created the socket */
if (sock->id == mdata.socket_config.sockets_len + 1) {
if (create_socket(sock, NULL) < 0) {
return -1;
}
}
memcpy(&sock->dst, addr, sizeof(*addr));
if (addr->sa_family == AF_INET6) {
dst_port = ntohs(net_sin6(addr)->sin6_port);
} else if (addr->sa_family == AF_INET) {
dst_port = ntohs(net_sin(addr)->sin_port);
} else {
errno = EAFNOSUPPORT;
return -1;
}
/* skip socket connect if UDP */
if (sock->ip_proto == IPPROTO_UDP) {
errno = 0;
return 0;
}
snprintk(buf, sizeof(buf), "AT+USOCO=%d,\"%s\",%d", sock->id,
modem_context_sprint_ip_addr(addr), dst_port);
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler,
NULL, 0U, buf,
&mdata.sem_response, MDM_CMD_CONN_TIMEOUT);
if (ret < 0) {
LOG_ERR("%s ret:%d", log_strdup(buf), ret);
errno = -ret;
return -1;
}
sock->is_connected = true;
errno = 0;
return 0;
}
/* support for POLLIN only for now. */
static int offload_poll(struct zsock_pollfd *fds, int nfds, int msecs)
{
int i;
void *obj;
/* Only accept modem sockets. */
for (i = 0; i < nfds; i++) {
if (fds[i].fd < 0) {
continue;
}
/* If vtable matches, then it's modem socket. */
obj = z_get_fd_obj(fds[i].fd,
(const struct fd_op_vtable *)
&offload_socket_fd_op_vtable,
EINVAL);
if (obj == NULL) {
return -1;
}
}
return modem_socket_poll(&mdata.socket_config, fds, nfds, msecs);
}
static ssize_t offload_recvfrom(void *obj, void *buf, size_t len,
int flags, struct sockaddr *from,
socklen_t *fromlen)
{
struct modem_socket *sock = (struct modem_socket *)obj;
int ret, next_packet_size;
static const struct modem_cmd cmd[] = {
MODEM_CMD("+USORF: ", on_cmd_sockreadfrom, 4U, ","),
MODEM_CMD("+USORD: ", on_cmd_sockread, 2U, ","),
};
char sendbuf[sizeof("AT+USORF=#,#####\r")];
struct socket_read_data sock_data;
if (!buf || len == 0) {
errno = EINVAL;
return -1;
}
if (flags & ZSOCK_MSG_PEEK) {
errno = ENOTSUP;
return -1;
}
next_packet_size = modem_socket_next_packet_size(&mdata.socket_config,
sock);
if (!next_packet_size) {
if (flags & ZSOCK_MSG_DONTWAIT) {
errno = EAGAIN;
return -1;
}
if (!sock->is_connected && sock->ip_proto != IPPROTO_UDP) {
errno = 0;
return 0;
}
modem_socket_wait_data(&mdata.socket_config, sock);
next_packet_size = modem_socket_next_packet_size(
&mdata.socket_config, sock);
}
/*
* Binary and ASCII mode allows sending MDM_MAX_DATA_LENGTH bytes to
* the socket in one command
*/
if (next_packet_size > MDM_MAX_DATA_LENGTH) {
next_packet_size = MDM_MAX_DATA_LENGTH;
}
snprintk(sendbuf, sizeof(sendbuf), "AT+USO%s=%d,%d",
sock->ip_proto == IPPROTO_UDP ? "RF" : "RD", sock->id,
len < next_packet_size ? len : next_packet_size);
/* socket read settings */
(void)memset(&sock_data, 0, sizeof(sock_data));
sock_data.recv_buf = buf;
sock_data.recv_buf_len = len;
sock_data.recv_addr = from;
sock->data = &sock_data;
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler,
cmd, ARRAY_SIZE(cmd), sendbuf, &mdata.sem_response,
MDM_CMD_TIMEOUT);
if (ret < 0) {
errno = -ret;
ret = -1;
goto exit;
}
/* HACK: use dst address as from */
if (from && fromlen) {
*fromlen = sizeof(sock->dst);
memcpy(from, &sock->dst, *fromlen);
}
/* return length of received data */
errno = 0;
ret = sock_data.recv_read_len;
exit:
/* clear socket data */
sock->data = NULL;
return ret;
}
static ssize_t offload_sendto(void *obj, const void *buf, size_t len,
int flags, const struct sockaddr *to,
socklen_t tolen)
{
struct iovec msg_iov = {
.iov_base = (void *)buf,
.iov_len = len,
};
struct msghdr msg = {
.msg_iovlen = 1,
.msg_name = (struct sockaddr *)to,
.msg_namelen = tolen,
.msg_iov = &msg_iov,
};
int ret = send_socket_data(obj, &msg, MDM_CMD_TIMEOUT);
if (ret < 0) {
errno = -ret;
return -1;
}
errno = 0;
return ret;
}
static int offload_ioctl(void *obj, unsigned int request, va_list args)
{
switch (request) {
case ZFD_IOCTL_POLL_PREPARE:
return -EXDEV;
case ZFD_IOCTL_POLL_UPDATE:
return -EOPNOTSUPP;
case ZFD_IOCTL_POLL_OFFLOAD: {
struct zsock_pollfd *fds;
int nfds;
int timeout;
fds = va_arg(args, struct zsock_pollfd *);
nfds = va_arg(args, int);
timeout = va_arg(args, int);
return offload_poll(fds, nfds, timeout);
}
default:
errno = EINVAL;
return -1;
}
}
static ssize_t offload_read(void *obj, void *buffer, size_t count)
{
return offload_recvfrom(obj, buffer, count, 0, NULL, 0);
}
static ssize_t offload_write(void *obj, const void *buffer, size_t count)
{
return offload_sendto(obj, buffer, count, 0, NULL, 0);
}
static ssize_t offload_sendmsg(void *obj, const struct msghdr *msg, int flags)
{
ssize_t sent = 0;
int bkp_iovec_idx;
struct iovec bkp_iovec = {0};
struct msghdr crafted_msg = {
.msg_name = msg->msg_name,
.msg_namelen = msg->msg_namelen,
};
size_t full_len = 0;
int ret;
/* Compute the full length to be send and check for invalid values */
for (int i = 0; i < msg->msg_iovlen; i++) {
if (!msg->msg_iov[i].iov_base || msg->msg_iov[i].iov_len == 0) {
errno = EINVAL;
return -1;
}
full_len += msg->msg_iov[i].iov_len;
}
LOG_DBG("msg_iovlen:%d flags:%d, full_len:%d",
msg->msg_iovlen, flags, full_len);
while (full_len > sent) {
int removed = 0;
int i = 0;
crafted_msg.msg_iovlen = msg->msg_iovlen;
crafted_msg.msg_iov = &msg->msg_iov[0];
bkp_iovec_idx = -1;
/* Iterate on iovec to remove the bytes already sent */
while (removed < sent) {
int to_removed = sent - removed;
if (to_removed >= msg->msg_iov[i].iov_len) {
crafted_msg.msg_iovlen -= 1;
crafted_msg.msg_iov = &msg->msg_iov[i + 1];
removed += msg->msg_iov[i].iov_len;
} else {
/* Backup msg->msg_iov[i] before "removing"
* starting bytes already send.
*/
bkp_iovec_idx = i;
bkp_iovec.iov_len = msg->msg_iov[i].iov_len;
bkp_iovec.iov_base = msg->msg_iov[i].iov_base;
/* Update msg->msg_iov[i] to "remove"
* starting bytes already send.
*/
msg->msg_iov[i].iov_len -= to_removed;
msg->msg_iov[i].iov_base = &(((uint8_t *)msg->msg_iov[i].iov_base)[to_removed]);
removed += to_removed;
}
i++;
}
ret = send_socket_data(obj, &crafted_msg, MDM_CMD_TIMEOUT);
/* Restore backup iovec when necessary */
if (bkp_iovec_idx != -1) {
msg->msg_iov[bkp_iovec_idx].iov_len = bkp_iovec.iov_len;
msg->msg_iov[bkp_iovec_idx].iov_base = bkp_iovec.iov_base;
}
/* Handle send_socket_data() returned value */
if (ret < 0) {
errno = -ret;
return -1;
}
sent += ret;
}
return (ssize_t)sent;
}
#if defined(CONFIG_NET_SOCKETS_SOCKOPT_TLS)
static int map_credentials(struct modem_socket *sock, const void *optval, socklen_t optlen)
{
sec_tag_t *sec_tags = (sec_tag_t *)optval;
int ret = 0;
int tags_len;
sec_tag_t tag;
int id;
int i;
struct tls_credential *cert;
if ((optlen % sizeof(sec_tag_t)) != 0 || (optlen == 0)) {
return -EINVAL;
}
tags_len = optlen / sizeof(sec_tag_t);
/* For each tag, retrieve the credentials value and type: */
for (i = 0; i < tags_len; i++) {
tag = sec_tags[i];
cert = credential_next_get(tag, NULL);
while (cert != NULL) {
switch (cert->type) {
case TLS_CREDENTIAL_CA_CERTIFICATE:
id = 0;
break;
case TLS_CREDENTIAL_NONE:
case TLS_CREDENTIAL_PSK:
case TLS_CREDENTIAL_PSK_ID:
default:
/* Not handled */
return -EINVAL;
}
struct modem_cmd cmd[] = {
MODEM_CMD("+USECMNG: ", on_cmd_cert_write, 3U, ","),
};
ret = send_cert(sock, cmd, 1, cert->buf, cert->len, id);
if (ret < 0) {
return ret;
}
cert = credential_next_get(tag, cert);
}
}
return 0;
}
#else
static int map_credentials(struct modem_socket *sock, const void *optval, socklen_t optlen)
{
return -EINVAL;
}
#endif
static int offload_setsockopt(void *obj, int level, int optname,
const void *optval, socklen_t optlen)
{
struct modem_socket *sock = (struct modem_socket *)obj;
int ret;
if (IS_ENABLED(CONFIG_NET_SOCKETS_SOCKOPT_TLS) && level == SOL_TLS) {
switch (optname) {
case TLS_SEC_TAG_LIST:
ret = map_credentials(sock, optval, optlen);
break;
case TLS_HOSTNAME:
LOG_WRN("TLS_HOSTNAME option is not supported");
return -EINVAL;
case TLS_PEER_VERIFY:
if (*(uint32_t *)optval != TLS_PEER_VERIFY_REQUIRED) {
LOG_WRN("Disabling peer verification is not supported");
return -EINVAL;
}
ret = 0;
break;
default:
return -EINVAL;
}
} else {
return -EINVAL;
}
return ret;
}
static const struct socket_op_vtable offload_socket_fd_op_vtable = {
.fd_vtable = {
.read = offload_read,
.write = offload_write,
.close = offload_close,
.ioctl = offload_ioctl,
},
.bind = offload_bind,
.connect = offload_connect,
.sendto = offload_sendto,
.recvfrom = offload_recvfrom,
.listen = NULL,
.accept = NULL,
.sendmsg = offload_sendmsg,
.getsockopt = NULL,
.setsockopt = offload_setsockopt,
};
static bool offload_is_supported(int family, int type, int proto)
{
/* TODO offloading always enabled for now. */
return true;
}
NET_SOCKET_REGISTER(ublox_sara_r4, AF_UNSPEC, offload_is_supported,
offload_socket);
#if defined(CONFIG_DNS_RESOLVER)
/* TODO: This is a bare-bones implementation of DNS handling
* We ignore most of the hints like ai_family, ai_protocol and ai_socktype.
* Later, we can add additional handling if it makes sense.
*/
static int offload_getaddrinfo(const char *node, const char *service,
const struct zsock_addrinfo *hints,
struct zsock_addrinfo **res)
{
static const struct modem_cmd cmd =
MODEM_CMD("+UDNSRN: ", on_cmd_dns, 1U, ",");
uint32_t port = 0U;
int ret;
/* DNS command + 128 bytes for domain name parameter */
char sendbuf[sizeof("AT+UDNSRN=#,'[]'\r") + 128];
/* init result */
(void)memset(&result, 0, sizeof(result));
(void)memset(&result_addr, 0, sizeof(result_addr));
/* FIXME: Hard-code DNS to return only IPv4 */
result.ai_family = AF_INET;
result_addr.sa_family = AF_INET;
result.ai_addr = &result_addr;
result.ai_addrlen = sizeof(result_addr);
result.ai_canonname = result_canonname;
result_canonname[0] = '\0';
if (service) {
port = ATOI(service, 0U, "port");
if (port < 1 || port > USHRT_MAX) {
return DNS_EAI_SERVICE;
}
}
if (port > 0U) {
/* FIXME: DNS is hard-coded to return only IPv4 */
if (result.ai_family == AF_INET) {
net_sin(&result_addr)->sin_port = htons(port);
}
}
/* check to see if node is an IP address */
if (net_addr_pton(result.ai_family, node,
&((struct sockaddr_in *)&result_addr)->sin_addr)
== 0) {
*res = &result;
return 0;
}
/* user flagged node as numeric host, but we failed net_addr_pton */
if (hints && hints->ai_flags & AI_NUMERICHOST) {
return DNS_EAI_NONAME;
}
snprintk(sendbuf, sizeof(sendbuf), "AT+UDNSRN=0,\"%s\"", node);
ret = modem_cmd_send(&mctx.iface, &mctx.cmd_handler,
&cmd, 1U, sendbuf, &mdata.sem_response,
MDM_DNS_TIMEOUT);
if (ret < 0) {
return ret;
}
LOG_DBG("DNS RESULT: %s",
log_strdup(net_addr_ntop(result.ai_family,
&net_sin(&result_addr)->sin_addr,
sendbuf, NET_IPV4_ADDR_LEN)));
*res = (struct zsock_addrinfo *)&result;
return 0;
}
static void offload_freeaddrinfo(struct zsock_addrinfo *res)
{
/* using static result from offload_getaddrinfo() -- no need to free */
res = NULL;
}
const struct socket_dns_offload offload_dns_ops = {
.getaddrinfo = offload_getaddrinfo,
.freeaddrinfo = offload_freeaddrinfo,
};
#endif
static int net_offload_dummy_get(sa_family_t family,
enum net_sock_type type,
enum net_ip_protocol ip_proto,
struct net_context **context)
{
LOG_ERR("CONFIG_NET_SOCKETS_OFFLOAD must be enabled for this driver");
return -ENOTSUP;
}
/* placeholders, until Zepyr IP stack updated to handle a NULL net_offload */
static struct net_offload modem_net_offload = {
.get = net_offload_dummy_get,
};
#define HASH_MULTIPLIER 37
static uint32_t hash32(char *str, int len)
{
uint32_t h = 0;
int i;
for (i = 0; i < len; ++i) {
h = (h * HASH_MULTIPLIER) + str[i];
}
return h;
}
static inline uint8_t *modem_get_mac(const struct device *dev)
{
struct modem_data *data = dev->data;
uint32_t hash_value;
data->mac_addr[0] = 0x00;
data->mac_addr[1] = 0x10;
/* use IMEI for mac_addr */
hash_value = hash32(mdata.mdm_imei, strlen(mdata.mdm_imei));
UNALIGNED_PUT(hash_value, (uint32_t *)(data->mac_addr + 2));
return data->mac_addr;
}
static void modem_net_iface_init(struct net_if *iface)
{
const struct device *dev = net_if_get_device(iface);
struct modem_data *data = dev->data;
/* Direct socket offload used instead of net offload: */
iface->if_dev->offload = &modem_net_offload;
net_if_set_link_addr(iface, modem_get_mac(dev),
sizeof(data->mac_addr),
NET_LINK_ETHERNET);
data->net_iface = iface;
#ifdef CONFIG_DNS_RESOLVER
socket_offload_dns_register(&offload_dns_ops);
#endif
}
static struct net_if_api api_funcs = {
.init = modem_net_iface_init,
};
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("+CME ERROR: ", on_cmd_exterror, 1U, ""),
MODEM_CMD_DIRECT("@", on_prompt),
};
static const struct modem_cmd unsol_cmds[] = {
MODEM_CMD("+UUSOCL: ", on_cmd_socknotifyclose, 1U, ""),
MODEM_CMD("+UUSORD: ", on_cmd_socknotifydata, 2U, ","),
MODEM_CMD("+UUSORF: ", on_cmd_socknotifydata, 2U, ","),
MODEM_CMD("+CREG: ", on_cmd_socknotifycreg, 1U, ""),
};
static int modem_init(const struct device *dev)
{
int ret = 0;
ARG_UNUSED(dev);
k_sem_init(&mdata.sem_response, 0, 1);
k_sem_init(&mdata.sem_prompt, 0, 1);
#if defined(CONFIG_MODEM_UBLOX_SARA_RSSI_WORK)
/* initialize the work queue */
k_work_queue_start(&modem_workq, modem_workq_stack,
K_KERNEL_STACK_SIZEOF(modem_workq_stack),
K_PRIO_COOP(7), NULL);
#endif
/* socket config */
mdata.socket_config.sockets = &mdata.sockets[0];
mdata.socket_config.sockets_len = ARRAY_SIZE(mdata.sockets);
mdata.socket_config.base_socket_num = MDM_BASE_SOCKET_NUM;
ret = modem_socket_init(&mdata.socket_config,
&offload_socket_fd_op_vtable);
if (ret < 0) {
goto error;
}
/* cmd handler */
mdata.cmd_handler_data.cmds[CMD_RESP] = response_cmds;
mdata.cmd_handler_data.cmds_len[CMD_RESP] = ARRAY_SIZE(response_cmds);
mdata.cmd_handler_data.cmds[CMD_UNSOL] = unsol_cmds;
mdata.cmd_handler_data.cmds_len[CMD_UNSOL] = ARRAY_SIZE(unsol_cmds);
mdata.cmd_handler_data.match_buf = &mdata.cmd_match_buf[0];
mdata.cmd_handler_data.match_buf_len = sizeof(mdata.cmd_match_buf);
mdata.cmd_handler_data.buf_pool = &mdm_recv_pool;
mdata.cmd_handler_data.alloc_timeout = K_NO_WAIT;
mdata.cmd_handler_data.eol = "\r";
ret = modem_cmd_handler_init(&mctx.cmd_handler,
&mdata.cmd_handler_data);
if (ret < 0) {
goto error;
}
/* modem interface */
mdata.iface_data.hw_flow_control = DT_PROP(MDM_UART_NODE,
hw_flow_control);
mdata.iface_data.rx_rb_buf = &mdata.iface_rb_buf[0];
mdata.iface_data.rx_rb_buf_len = sizeof(mdata.iface_rb_buf);
ret = modem_iface_uart_init(&mctx.iface, &mdata.iface_data,
MDM_UART_DEV_NAME);
if (ret < 0) {
goto error;
}
/* modem data storage */
mctx.data_manufacturer = mdata.mdm_manufacturer;
mctx.data_model = mdata.mdm_model;
mctx.data_revision = mdata.mdm_revision;
mctx.data_imei = mdata.mdm_imei;
/* pin setup */
mctx.pins = modem_pins;
mctx.pins_len = ARRAY_SIZE(modem_pins);
mctx.driver_data = &mdata;
ret = modem_context_register(&mctx);
if (ret < 0) {
LOG_ERR("Error registering modem context: %d", ret);
goto error;
}
/* start RX thread */
k_thread_create(&modem_rx_thread, modem_rx_stack,
K_KERNEL_STACK_SIZEOF(modem_rx_stack),
(k_thread_entry_t) modem_rx,
NULL, NULL, NULL, K_PRIO_COOP(7), 0, K_NO_WAIT);
#if defined(CONFIG_MODEM_UBLOX_SARA_RSSI_WORK)
/* init RSSI query */
k_work_init_delayable(&mdata.rssi_query_work, modem_rssi_query_work);
#endif
modem_reset();
error:
return ret;
}
NET_DEVICE_DT_INST_OFFLOAD_DEFINE(0, modem_init, device_pm_control_nop,
&mdata, NULL,
CONFIG_MODEM_UBLOX_SARA_R4_INIT_PRIORITY,
&api_funcs,
MDM_MAX_DATA_LENGTH);
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