void __ubmodem_recvfrom_socket(struct modem_socket_s *sock)
{
struct ubmodem_s *modem = sock->modem;
int err;
size_t inlen;
size_t max_stream_len;
size_t recvlen;
if (sock->is_closed)
{
/* Socket closed! */
(void)__ubmodem_usrsock_send_response(modem, &sock->req, false, -EPIPE);
__ubsocket_work_done(sock);
return;
}
inlen = sock->recv.avail;
if (inlen > sock->recv.max_buflen)
inlen = sock->recv.max_buflen;
if (sock->type == SOCK_DGRAM)
{
max_stream_len = __ubmodem_stream_max_readbuf_len(&cmd_ATpUSORF);
max_stream_len -= INET_ADDRSTRLEN;
}
else
{
max_stream_len = __ubmodem_stream_max_readbuf_len(&cmd_ATpUSORD);
}
MODEM_DEBUGASSERT(modem, inlen > 0); /* sockets state machine should not allow
* recv if input buffer has no space
* left. */
recvlen = max_stream_len;
if (recvlen > MODEM_MAX_BINARY_SOCKET_READ_BYTES)
recvlen = MODEM_MAX_BINARY_SOCKET_READ_BYTES;
if (recvlen > inlen)
recvlen = inlen;
if (sock->type == SOCK_DGRAM)
{
/* Read data and peer address from modem. */
err = __ubmodem_send_cmd(modem, &cmd_ATpUSORF, socket_recvfrom_handler,
sock, "=%d,%d", sock->modem_sd, recvlen);
MODEM_DEBUGASSERT(modem, err == OK);
}
else
{
/* Read data from modem. */
err = __ubmodem_send_cmd(modem, &cmd_ATpUSORD, socket_recvfrom_handler,
sock, "=%d,%d", sock->modem_sd, recvlen);
MODEM_DEBUGASSERT(modem, err == OK);
}
}
void __ubmodem_substate_start_setup_network(struct ubmodem_s *modem)
{
struct modem_sub_setup_network_s *sub = &modem->sub.setup_network;
int err;
MODEM_DEBUGASSERT(modem, modem->level == UBMODEM_LEVEL_SIM_ENABLED);
/*
* Setup network sequence is:
*
* 1. Enable "+CREG" URC.
* 2. Send "AT+CFUN=1".
* 3. Send "AT+COPS=0".
* 4. Wait until connected (Wait information from +CREG)
*
*/
MODEM_DEBUGASSERT(modem, modem->creg_urc_registered == false);
MODEM_DEBUGASSERT(modem, modem->creg_timer_id == -1);
/* Reset sub-state data and initiate sub-state machine work. */
memset(sub, 0, sizeof(*sub));
sub->network_state = NETWORK_SETUP_ENABLING_CREG;
/* Setup sub-state clean-up function. */
modem->substate_cleanup_fn = setup_network_cleanup;
/* Enable +CREG. */
err = __ubmodem_send_cmd(modem, &cmd_ATpCREG, ATpCREG_handler, sub,
"%s", "=1");
MODEM_DEBUGASSERT(modem, err == OK);
}
static int network_start_register_handler(struct ubmodem_s *modem,
const int timer_id,
void * const arg)
{
struct modem_sub_setup_network_s *sub = &modem->sub.setup_network;
int err;
MODEM_DEBUGASSERT(modem, modem->creg_timer_id == timer_id);
if (timer_id != -1)
{
/* One-shot timer, not registered anymore. */
modem->creg_timer_id = -1;
ubmodem_pm_set_activity(modem, UBMODEM_PM_ACTIVITY_HIGH, false);
}
/* Keep retrying automatic network registration until timeout. */
sub->network_state = NETWORK_SETUP_RETRYING_NETWORK_REGISTRATION;
sub->received_creg_while_retrying = -1;
err = __ubmodem_send_cmd(modem, &cmd_ATpCOPS,
retry_ATpCOPS_handler, sub, "%s", "=0");
MODEM_DEBUGASSERT(modem, err == OK);
return OK;
}
void __ubmodem_substate_start_disconnect_network(struct ubmodem_s *modem)
{
struct modem_sub_setup_network_s *sub = &modem->sub.setup_network;
int err;
MODEM_DEBUGASSERT(modem, modem->level == UBMODEM_LEVEL_NETWORK ||
modem->level == UBMODEM_LEVEL_GPRS);
/*
* Disconnect network sequence is:
*
* 1. Send "AT+COPS=2".
* 2. Send "AT+CFUN=0".
*
*/
__ubmodem_network_cleanup(modem);
/* Reset sub-state data and initiate sub-state machine work. */
memset(sub, 0, sizeof(*sub));
sub->network_state = NETWORK_SETUP_DISCONNECTING;
/* Disable network. */
err = __ubmodem_send_cmd(modem, &cmd_ATpCOPS, set_ATpCOPS_off_handler, sub,
"%s", "=2");
MODEM_DEBUGASSERT(modem, err == OK);
}
static void config_audio_out_ctrl_gpio(struct ubmodem_s *modem, int pin,
bool set)
{
int err;
err = __ubmodem_send_cmd(modem, &cmd_ATpUGPIOC,
__ubmodem_cmdprompt_generic_config_handler,
(void *)&cmd_ATpUGPIOC, "=%d,0,%d", pin, set);
MODEM_DEBUGASSERT(modem, err == OK);
}
static void config_enable_urc_common(struct ubmodem_s *modem,
const struct at_cmd_def_s *cmd)
{
int err;
__ubmodem_voice_control_setup(modem);
err = __ubmodem_send_cmd(modem, cmd,
__ubmodem_cmdprompt_generic_config_handler,
(void *)cmd, "=1");
MODEM_DEBUGASSERT(modem, err == OK);
}
static int network_unregister_timer_handler(struct ubmodem_s *modem,
const int timer_id,
void * const arg)
{
struct modem_sub_setup_network_s *sub = arg;
int err;
/* Send +CFUN=0 */
err = __ubmodem_send_cmd(modem, &cmd_ATpCFUN, set_ATpCFUN_off_handler, sub,
"%s", "=0");
MODEM_DEBUGASSERT(modem, err == OK);
return OK;
}
static int network_unregister_timer_handler(struct ubmodem_s *modem,
const int timer_id,
void * const arg)
{
struct modem_sub_setup_network_s *sub = &modem->sub.setup_network;
int err;
/* Send +CFUN=0 */
ubmodem_pm_set_activity(modem, UBMODEM_PM_ACTIVITY_HIGH, false);
err = __ubmodem_send_cmd(modem, &cmd_ATpCFUN, set_ATpCFUN_off_handler, sub,
"%s", "=0");
MODEM_DEBUGASSERT(modem, err == OK);
return OK;
}
static int start_task_voice_hangup(struct ubmodem_s *modem, void *priv)
{
int err;
if (modem->level < UBMODEM_LEVEL_NETWORK)
{
return ERROR;
}
/* Send hangup call command 'AT+CHUP' */
err = __ubmodem_send_cmd(modem, &cmd_ATpCHUP, ATpCHUP_handler, modem, "");
MODEM_DEBUGASSERT(modem, err == OK);
return OK;
}
static int start_task_voice_answer(struct ubmodem_s *modem, void *priv)
{
int err;
if (modem->level < UBMODEM_LEVEL_NETWORK)
{
return ERROR;
}
/* Send answer call command 'ATA' */
err = __ubmodem_send_cmd(modem, &cmd_ATA, ATA_handler, priv, "");
MODEM_DEBUGASSERT(modem, err == OK);
return OK;
}
static void ATpCREG_handler(struct ubmodem_s *modem,
const struct at_cmd_def_s *cmd,
const struct at_resp_info_s *info,
const uint8_t *resp_stream,
size_t stream_len, void *priv)
{
struct modem_sub_setup_network_s *sub = &modem->sub.setup_network;
int err;
/*
* Response handler for AT+CREG=1
*/
MODEM_DEBUGASSERT(modem, cmd == &cmd_ATpCREG);
if (resp_status_is_error_or_timeout(info->status))
{
__ubmodem_common_failed_command(modem, cmd, info, "=1");
return;
}
if (info->status != RESP_STATUS_OK)
{
MODEM_DEBUGASSERT(modem, false); /* Should not get here. */
return;
}
/* Register "+CREG" URC handler. */
__ubparser_register_response_handler(&modem->parser, &urc_ATpCREG,
registration_urc_pCREG_handler,
sub, true);
modem->creg_urc_registered = true;
sub->network_state = NETWORK_SETUP_ENABLING_RF;
/* Enable modem RF. */
err = __ubmodem_send_cmd(modem, &cmd_ATpCFUN, ATpCFUN_handler, sub, "%s", "=1");
MODEM_DEBUGASSERT(modem, err == OK);
}
static void ATpCFUN_handler(struct ubmodem_s *modem,
const struct at_cmd_def_s *cmd,
const struct at_resp_info_s *info,
const uint8_t *resp_stream,
size_t stream_len, void *priv)
{
struct modem_sub_setup_network_s *sub = &modem->sub.setup_network;
int err;
/*
* Response handler for AT+CFUN=1
*/
MODEM_DEBUGASSERT(modem, cmd == &cmd_ATpCFUN);
if (resp_status_is_error_or_timeout(info->status))
{
__ubmodem_common_failed_command(modem, cmd, info, "=1");
return;
}
if (info->status != RESP_STATUS_OK)
{
MODEM_DEBUGASSERT(modem, false); /* Should not get here. */
return;
}
/*
* Modem RF enabled, now disable previous automatic network registration.
* +CREG:0 will be received and +COPS=0 will be issued to start new automatic
* network registration.
*/
sub->network_state = NETWORK_SETUP_STARTING_NETWORK_REGISTRATION;
(void)clock_gettime(CLOCK_MONOTONIC, &sub->net_reg_start_ts);
err = __ubmodem_send_cmd(modem, &cmd_ATpCOPS, disable_ATpCOPS_handler, sub,
"%s", "=2");
MODEM_DEBUGASSERT(modem, err == OK);
}
static void ATpCFUN_handler(struct ubmodem_s *modem,
const struct at_cmd_def_s *cmd,
const struct at_resp_info_s *info,
const uint8_t *resp_stream,
size_t stream_len, void *priv)
{
struct modem_sub_setup_network_s *sub = priv;
int err;
/*
* Response handler for AT+CFUN=1
*/
MODEM_DEBUGASSERT(modem, cmd == &cmd_ATpCFUN);
if (resp_status_is_error_or_timeout(info->status))
{
__ubmodem_common_failed_command(modem, cmd, info, "=1");
return;
}
if (info->status != RESP_STATUS_OK)
{
MODEM_DEBUGASSERT(modem, false); /* Should not get here. */
return;
}
/*
* Modem RF enabled, now start automatic network registration.
*/
sub->network_state = NETWORK_SETUP_STARTING_NETWORK_REGISTRATION;
err = __ubmodem_send_cmd(modem, &cmd_ATpCOPS, set_ATpCOPS_handler, sub,
"%s", "=0");
MODEM_DEBUGASSERT(modem, err == OK);
}
static int network_retry_registration_timer_handler(struct ubmodem_s *modem,
const int timer_id,
void * const arg)
{
struct modem_sub_setup_network_s *sub = &modem->sub.setup_network;
int err;
MODEM_DEBUGASSERT(modem, modem->creg_timer_id == timer_id);
if (timer_id != -1)
{
/* One-shot timer, not registered anymore. */
modem->creg_timer_id = -1;
ubmodem_pm_set_activity(modem, UBMODEM_PM_ACTIVITY_HIGH, false);
}
DEBUGASSERT(
sub->network_state == NETWORK_SETUP_RETRYING_NETWORK_REGISTRATION);
if (sub->received_creg_while_retrying > 0)
{
ubdbg("Handling deferred +CREG: %d\n", sub->received_creg_while_retrying);
network_registration_successed(modem, sub);
}
else
{
err = __ubmodem_send_cmd(modem, &cmd_ATpCOPS,
retry_ATpCOPS_handler, sub, "%s", "=0");
MODEM_DEBUGASSERT(modem, err == OK);
}
return OK;
}
static void urc_pCREG_handler(struct ubmodem_s *modem,
const struct at_cmd_def_s *cmd,
const struct at_resp_info_s *info,
const uint8_t *resp_stream,
size_t stream_len, void *priv)
{
int8_t val;
int err;
int ret;
/*
* Response handler for +CREG URC.
*/
MODEM_DEBUGASSERT(modem, cmd == &urc_ATpCREG);
if (info->status != RESP_STATUS_URC)
{
/* Should not happen. */
MODEM_DEBUGASSERT(modem, false);
return;
}
if (!__ubmodem_stream_get_int8(&resp_stream, &stream_len, &val))
{
/* Should not happen. */
MODEM_DEBUGASSERT(modem, false);
return;
}
dbg("Network registration URC, +CREG=%d.\n", val);
if (val >= 0 && val < ARRAY_SIZE(creg_strings))
{
dbg("%s\n", creg_strings[val]);
}
else
{
dbg("Unknown +CREG status: %d\n", val);
}
if (modem->level < UBMODEM_LEVEL_NETWORK)
{
struct modem_sub_setup_network_s *sub = &modem->sub.setup_network;
DEBUGASSERT(modem->state == MODEM_STATE_IN_SUBSTATE);
if (sub->network_state < NETWORK_SETUP_WAITING_NETWORK_REGISTRATION)
{
/* Not ready yet, spurious +CREG URC? */
ubdbg("Ignored spurious +CREG URC.\n");
return;
}
switch (val)
{
case 1:
case 5:
/*
* If 'val' is 1, registered: home network.
* If 'val' is 5, registered: roamed.
*/
if (sub->network_state == NETWORK_SETUP_RETRYING_NETWORK_REGISTRATION)
{
/* Cannot do state transition to UBMODEM_LEVEL_NETWORK right now
* as still retrying AT+COPS=0. Defer handling to
* retry_ATpCOPS_handler. */
sub->received_creg_while_retrying = val;
}
else
{
/* Report successful cellular network connection. */
sub->keep_creg_urc = true;
__ubmodem_reached_level(modem, UBMODEM_LEVEL_NETWORK);
}
return;
case 0:
/*
* MT not searching for connection.
*/
if (sub->network_state == NETWORK_SETUP_WAITING_NETWORK_REGISTRATION)
{
/* Keep retrying automatic network registration until timeout. */
sub->network_state = NETWORK_SETUP_RETRYING_NETWORK_REGISTRATION;
sub->received_creg_while_retrying = -1;
err = __ubmodem_send_cmd(modem, &cmd_ATpCOPS,
retry_ATpCOPS_handler, sub, "%s", "=0");
MODEM_DEBUGASSERT(modem, err == OK);
}
return;
case 4:
/*
* If 'val' is 4, unknown registration error.
*/
/* no break */
case 3:
/*
* If 'val' is 3, registration was denied.
*/
/* Perform fail-over code from timeout handler. */
network_register_timer_handler(modem, -1, sub);
return;
case 2:
/*
* If 'val' is 2, modem is trying to register.
*/
return;
default:
/*
* Unknown.
*/
return;
}
}
else
{
/* Current level is UBMODEM_LEVEL_NETWORK or higher. */
switch (val)
{
default: /* Unknown? */
case 1: /* Switched to home network? */
case 5: /* Switched to roaming? */
if (modem->creg_timer_id >= 0)
{
__ubmodem_remove_timer(modem, modem->creg_timer_id);
modem->creg_timer_id = -1;
}
return;
case 2: /* Looking for connection. */
/* Start connection search timeout timer. */
ret = __ubmodem_set_timer(modem, MODEM_CMD_NETWORK_TIMEOUT * 100,
&network_reregister_timer_handler, modem);
if (ret == ERROR)
{
/* Error here? Add assert? Or just try bailout? */
MODEM_DEBUGASSERT(modem, false);
(void)network_reregister_timer_handler(modem, -1, modem);
return;
}
modem->creg_timer_id = ret;
return;
case 3: /* Registration failed? */
case 4: /* Unknown registration error? */
case 0: /* MT not searching for connection. */
/* Unregister +CREG URC */
__ubparser_unregister_response_handler(&modem->parser,
urc_ATpCREG.name);
modem->creg_urc_registered = false;
/* Issue new task. We cannot issue new state machine work from
* URC 'context' as other work might be active in main state
* machine. Task will be run with main state machine in proper
* state. */
__ubmodem_add_task(modem, retry_network_through_sim, NULL);
return;
}
}
}