void Nanostack::Interface::network_handler(mesh_connection_status_t status)
{
if ((status == MESH_CONNECTED || status == MESH_CONNECTED_LOCAL ||
status == MESH_CONNECTED_GLOBAL) && _blocking) {
connect_semaphore.release();
}
if (status == MESH_CONNECTED) {
uint8_t temp_ipv6_global[16];
uint8_t temp_ipv6_local[16];
if (arm_net_address_get(interface_id, ADDR_IPV6_LL, temp_ipv6_local) == 0) {
_connect_status = NSAPI_STATUS_LOCAL_UP;
}
if (arm_net_address_get(interface_id, ADDR_IPV6_GP, temp_ipv6_global) == 0
&& (memcmp(temp_ipv6_global, temp_ipv6_local, 16) != 0)) {
_connect_status = NSAPI_STATUS_GLOBAL_UP;
}
} else if (status == MESH_CONNECTED_LOCAL) {
_connect_status = NSAPI_STATUS_LOCAL_UP;
} else if (status == MESH_CONNECTED_GLOBAL) {
_connect_status = NSAPI_STATUS_GLOBAL_UP;
} else if (status == MESH_BOOTSTRAP_STARTED || status == MESH_BOOTSTRAP_FAILED) {
_connect_status = NSAPI_STATUS_CONNECTING;
} else {
_connect_status = NSAPI_STATUS_DISCONNECTED;
}
if (_connection_status_cb && _previous_connection_status != _connect_status) {
_connection_status_cb(NSAPI_EVENT_CONNECTION_STATUS_CHANGE, _connect_status);
}
_previous_connection_status = _connect_status;
}
void PPPCellularInterface::ppp_status_cb(nsapi_event_t event, intptr_t parameter)
{
_connect_status = (nsapi_connection_status_t)parameter;
if (_connection_status_cb) {
_connection_status_cb(event, parameter);
}
}
nsapi_error_t PPPCellularInterface::connect()
{
nsapi_error_t retcode;
bool success;
bool did_init = false;
const char *apn_config = NULL;
bool user_specified_apn = false;
/* If the user has specified the APN then use that or,
* if we are not using the APN database, set _apn to
* "internet" as a best guess
*/
if (_apn) {
user_specified_apn = true;
} else {
#ifndef MBED_CONF_PPP_CELL_IFACE_APN_LOOKUP
_apn = "internet";
user_specified_apn = true;
#endif
}
if (is_connected()) {
return NSAPI_ERROR_IS_CONNECTED;
} else if (_connect_status == NSAPI_STATUS_CONNECTING) {
return NSAPI_ERROR_ALREADY;
}
_connect_status = NSAPI_STATUS_CONNECTING;
if (_connection_status_cb) {
_connection_status_cb(NSAPI_EVENT_CONNECTION_STATUS_CHANGE, NSAPI_STATUS_CONNECTING);
}
do {
retry_init:
retcode = NSAPI_ERROR_OK;
/* setup AT parser */
setup_at_parser();
if (!initialized) {
/* If we have hangup (eg DCD) detection, we don't want it active
* as long as we are using ATCmdParser.
* As soon as we get into data mode, we will turn it back on. */
enable_hup(false);
if (!power_up()) {
retcode = NSAPI_ERROR_DEVICE_ERROR;
break;
}
retcode = initialize_sim_card();
if (retcode != NSAPI_ERROR_OK) {
break;
}
success = nwk_registration(PACKET_SWITCHED) //perform network registration
&& get_CCID(_at)//get integrated circuit ID of the SIM
&& get_IMSI(_at)//get international mobile subscriber information
&& get_IMEI(_at)//get international mobile equipment identifier
&& get_MEID(_at)//its same as IMEI
&& set_CMGF(_at)//set message format for SMS
&& set_CNMI(_at);//set new SMS indication
if (!success) {
retcode = NSAPI_ERROR_NO_CONNECTION;
break;
}
#if MBED_CONF_PPP_CELL_IFACE_APN_LOOKUP
if (!apn_config) {
apn_config = apnconfig(dev_info.imsi);
}
#endif
/* Check if user want skip SIM pin checking on boot up */
if (set_sim_pin_check_request) {
retcode = do_sim_pin_check(_at, _pin);
if (retcode != NSAPI_ERROR_OK) {
break;
}
/* set this request to false, as it is unnecessary to repeat in case of retry */
set_sim_pin_check_request = false;
}
/* check if the user requested a sim pin change */
if (change_pin) {
retcode = do_change_sim_pin(_at, _pin, _new_pin);
if (retcode != NSAPI_ERROR_OK) {
break;
}
/* set this request to false, as it is unnecessary to repeat in case of retry */
change_pin = false;
}
#if MBED_CONF_PPP_CELL_IFACE_APN_LOOKUP
if (!user_specified_apn && apn_config) {
_apn = _APN_GET(apn_config);
_uname = _APN_GET(apn_config);
_pwd = _APN_GET(apn_config);
tr_info("Looked up APN %s.", _apn);
}
#endif
//sets up APN and IP protocol for external PDP context
retcode = setup_context_and_credentials();
if (retcode != NSAPI_ERROR_OK) {
break;
}
if (!success) {
shutdown_at_parser();
retcode = NSAPI_ERROR_NO_CONNECTION;
break;
}
initialized = true;
did_init = true;
} else {
/* If we were already initialized, we expect to receive NO_CARRIER response
* from the modem as we were kicked out of Data mode */
_at->recv("NO CARRIER");
success = _at->send("AT") && _at->recv("OK");
}
tr_info("The APN being used is %s.\n", _apn);
/* Attempt to enter data mode */
success = set_atd(_at); //enter into Data mode with the modem
if (!success) {
power_down();
initialized = false;
/* if we were previously initialized , i.e., not in this particular attempt,
* we want to re-initialize */
if (!did_init) {
goto retry_init;
}
/* shutdown AT parser before notifying application of the failure */
shutdown_at_parser();
retcode = NSAPI_ERROR_NO_CONNECTION;
break;
}
/* This is the success case.
* Save RAM, discard AT Parser as we have entered Data mode. */
shutdown_at_parser();
/* We now want hangup (e.g., DCD) detection if available */
enable_hup(true);
/* Initialize PPP
* mbed_ppp_init() is a blocking call, it will block until
* connected, or timeout after 30 seconds*/
retcode = nsapi_ppp_connect(_fh, callback(this, &PPPCellularInterface::ppp_status_cb), _uname, _pwd, _stack);
if (retcode == NSAPI_ERROR_OK && _connect_is_blocking) {
_connect_status = NSAPI_STATUS_GLOBAL_UP;
}
} while ((_connect_status == NSAPI_STATUS_CONNECTING && _connect_is_blocking) &&
apn_config && *apn_config);
if (retcode != NSAPI_ERROR_OK) {
_connect_status = NSAPI_STATUS_DISCONNECTED;
if (_connection_status_cb) {
_connection_status_cb(NSAPI_EVENT_CONNECTION_STATUS_CHANGE, NSAPI_STATUS_DISCONNECTED);
}
}
return retcode;
}
