fahim alavi
fork
Diff: UbloxATCellularInterface.cpp
- Revision:
- 0:7ccf0e7e8a83
- Child:
- 1:bc228becc45d
diff -r 000000000000 -r 7ccf0e7e8a83 UbloxATCellularInterface.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/UbloxATCellularInterface.cpp Mon Jun 12 21:32:21 2017 +0000
@@ -0,0 +1,1208 @@
+/* Copyright (c) 2017 ublox Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "UbloxATCellularInterface.h"
+#include "mbed_poll.h"
+#include "nsapi.h"
+#include "APN_db.h"
+#ifdef FEATURE_COMMON_PAL
+#include "mbed_trace.h"
+#define TRACE_GROUP "UACI"
+#else
+#define tr_debug(format, ...) debug(format, ## __VA_ARGS__)
+#define tr_info(format, ...) debug(format, ## __VA_ARGS__)
+#define tr_warn(format, ...) debug(format, ## __VA_ARGS__)
+#define tr_error(format, ...) debug(format, ## __VA_ARGS__)
+#endif
+
+/**********************************************************************
+ * PRIVATE METHODS
+ **********************************************************************/
+
+// Event thread for asynchronous received data handling.
+void UbloxATCellularInterface::handle_event(){
+ pollfh fhs;
+ int count;
+ int at_timeout;
+
+ fhs.fh = _fh;
+ fhs.events = POLLIN;
+
+ while (true) {
+ count = poll(&fhs, 1, 1000);
+ if (count > 0 && (fhs.revents & POLLIN)) {
+ LOCK();
+ at_timeout = _at_timeout;
+ at_set_timeout(10); // Avoid blocking but also make sure we don't
+ // time out if we get ahead of the serial port
+ _at->debug_on(false); // Debug here screws with the test output
+ // Let the URCs run
+ _at->recv(UNNATURAL_STRING);
+ _at->debug_on(_debug_trace_on);
+ at_set_timeout(at_timeout);
+ UNLOCK();
+ }
+ }
+}
+
+// Find or create a socket from the list.
+UbloxATCellularInterface::SockCtrl * UbloxATCellularInterface::find_socket(int modem_handle)
+{
+ UbloxATCellularInterface::SockCtrl *socket = NULL;
+
+ for (unsigned int x = 0; (socket == NULL) && (x < sizeof(_sockets) / sizeof(_sockets[0])); x++) {
+ if (_sockets[x].modem_handle == modem_handle) {
+ socket = &(_sockets[x]);
+ }
+ }
+
+ return socket;
+}
+
+// Clear out the storage for a socket
+void UbloxATCellularInterface::clear_socket(UbloxATCellularInterface::SockCtrl * socket)
+{
+ if (socket != NULL) {
+ socket->modem_handle = SOCKET_UNUSED;
+ socket->pending = 0;
+ socket->callback = NULL;
+ socket->data = NULL;
+ }
+}
+
+// Check that a socket pointer is valid
+bool UbloxATCellularInterface::check_socket(SockCtrl * socket)
+{
+ bool success = false;
+
+ if (socket != NULL) {
+ for (unsigned int x = 0; !success && (x < sizeof(_sockets) / sizeof(_sockets[0])); x++) {
+ if (socket == &(_sockets[x])) {
+ success = true;
+ }
+ }
+ }
+
+ return success;
+}
+
+// Convert nsapi_security_t to the modem security numbers
+int UbloxATCellularInterface::nsapi_security_to_modem_security(nsapi_security_t nsapi_security)
+{
+ int modem_security = 3;
+
+ switch (nsapi_security)
+ {
+ case NSAPI_SECURITY_NONE:
+ modem_security = 0;
+ break;
+ case NSAPI_SECURITY_PAP:
+ modem_security = 1;
+ break;
+ case NSAPI_SECURITY_CHAP:
+ modem_security = 2;
+ break;
+ case NSAPI_SECURITY_UNKNOWN:
+ modem_security = 3;
+ break;
+ default:
+ modem_security = 3;
+ break;
+ }
+
+ return modem_security;
+}
+
+// Callback for Socket Read URC.
+void UbloxATCellularInterface::UUSORD_URC()
+{
+ int a;
+ int b;
+ char buf[32];
+ SockCtrl *socket;
+
+ // Note: not calling _at->recv() from here as we're
+ // already in an _at->recv()
+ // +UUSORD: <socket>,<length>
+ if (read_at_to_char(buf, sizeof (buf), '\n') > 0) {
+ if (sscanf(buf, ": %d,%d", &a, &b) == 2) {
+ socket = find_socket(a);
+ if (socket != NULL) {
+ socket->pending = b;
+ // No debug prints here as they can affect timing
+ // and cause data loss in UARTSerial
+ if (socket->callback != NULL) {
+ socket->callback(socket->data);
+ }
+ }
+ }
+ }
+}
+
+// Callback for Socket Read From URC.
+void UbloxATCellularInterface::UUSORF_URC()
+{
+ int a;
+ int b;
+ char buf[32];
+ SockCtrl *socket;
+
+ // Note: not calling _at->recv() from here as we're
+ // already in an _at->recv()
+ // +UUSORF: <socket>,<length>
+ if (read_at_to_char(buf, sizeof (buf), '\n') > 0) {
+ if (sscanf(buf, ": %d,%d", &a, &b) == 2) {
+ socket = find_socket(a);
+ if (socket != NULL) {
+ socket->pending = b;
+ // No debug prints here as they can affect timing
+ // and cause data loss in UARTSerial
+ if (socket->callback != NULL) {
+ socket->callback(socket->data);
+ }
+ }
+ }
+ }
+}
+
+// Callback for Socket Close URC.
+void UbloxATCellularInterface::UUSOCL_URC()
+{
+ int a;
+ char buf[32];
+ SockCtrl *socket;
+
+ // Note: not calling _at->recv() from here as we're
+ // already in an _at->recv()
+ // +UUSOCL: <socket>
+ if (read_at_to_char(buf, sizeof (buf), '\n') > 0) {
+ if (sscanf(buf, ": %d", &a) == 1) {
+ socket = find_socket(a);
+ tr_debug("Socket 0x%08x: handle %d closed by remote host",
+ (unsigned int) socket, a);
+ clear_socket(socket);
+ }
+ }
+}
+
+// Callback for UUPSDD.
+void UbloxATCellularInterface::UUPSDD_URC()
+{
+ int a;
+ char buf[32];
+ SockCtrl *socket;
+
+ // Note: not calling _at->recv() from here as we're
+ // already in an _at->recv()
+ // +UUPSDD: <socket>
+ if (read_at_to_char(buf, sizeof (buf), '\n') > 0) {
+ if (sscanf(buf, ": %d", &a) == 1) {
+ socket = find_socket(a);
+ tr_debug("Socket 0x%08x: handle %d connection lost",
+ (unsigned int) socket, a);
+ clear_socket(socket);
+ if (_connection_status_cb) {
+ _connection_status_cb(NSAPI_ERROR_CONNECTION_LOST);
+ }
+ }
+ }
+}
+
+/**********************************************************************
+ * PROTECTED METHODS: GENERAL
+ **********************************************************************/
+
+// Get the next set of credentials, based on IMSI.
+void UbloxATCellularInterface::get_next_credentials(const char * config)
+{
+ if (config) {
+ _apn = _APN_GET(config);
+ _uname = _APN_GET(config);
+ _pwd = _APN_GET(config);
+ }
+
+ _apn = _apn ? _apn : "";
+ _uname = _uname ? _uname : "";
+ _pwd = _pwd ? _pwd : "";
+}
+
+// Active a connection profile on board the modem.
+// Note: the AT interface should be locked before this is called.
+bool UbloxATCellularInterface::activate_profile(const char* apn,
+ const char* username,
+ const char* password,
+ nsapi_security_t auth)
+{
+ bool activated = false;
+ bool success = false;
+ int at_timeout = _at_timeout;
+ SocketAddress address;
+
+ // Set up the APN
+ if (*apn) {
+ success = _at->send("AT+UPSD=" PROFILE ",1,\"%s\"", apn) && _at->recv("OK");
+ }
+ if (success && *username) {
+ success = _at->send("AT+UPSD=" PROFILE ",2,\"%s\"", username) && _at->recv("OK");
+ }
+ if (success && *password) {
+ success = _at->send("AT+UPSD=" PROFILE ",3,\"%s\"", password) && _at->recv("OK");
+ }
+
+ if (success) {
+ // Set up dynamic IP address assignment.
+ success = _at->send("AT+UPSD=" PROFILE ",7,\"0.0.0.0\"") && _at->recv("OK");
+ // Set up the authentication protocol
+ // 0 = none
+ // 1 = PAP (Password Authentication Protocol)
+ // 2 = CHAP (Challenge Handshake Authentication Protocol)
+ for (int protocol = nsapi_security_to_modem_security(NSAPI_SECURITY_NONE);
+ success && (protocol <= nsapi_security_to_modem_security(NSAPI_SECURITY_CHAP)); protocol++) {
+ if ((_auth == NSAPI_SECURITY_UNKNOWN) || (nsapi_security_to_modem_security(_auth) == protocol)) {
+ if (_at->send("AT+UPSD=" PROFILE ",6,%d", protocol) && _at->recv("OK")) {
+ // Activate, waiting 30 seconds for the connection to be made
+ at_set_timeout(30000);
+ activated = _at->send("AT+UPSDA=" PROFILE ",3") && _at->recv("OK");
+ at_set_timeout(at_timeout);
+ }
+ }
+ }
+ }
+
+ return activated;
+}
+
+// Activate a profile by reusing an external PDP context.
+// Note: the AT interface should be locked before this is called.
+bool UbloxATCellularInterface::activate_profile_reuse_external(void)
+{
+ bool success = false;
+ int cid = -1;
+ char ip[NSAPI_IP_SIZE];
+ SocketAddress address;
+ int t;
+ int at_timeout = _at_timeout;
+
+ //+CGDCONT: <cid>,"IP","<apn name>","<ip adr>",0,0,0,0,0,0
+ if (_at->send("AT+CGDCONT?")) {
+ if (_at->recv("+CGDCONT: %d,\"IP\",\"%*[^\"]\",\"%" u_stringify(NSAPI_IP_SIZE) "[^\"]\",%*d,%*d,%*d,%*d,%*d,%*d",
+ &t, ip) &&
+ _at->recv("OK")) {
+ // Check if the IP address is valid
+ if (address.set_ip_address(ip)) {
+ cid = t;
+ }
+ }
+ }
+
+ // If a context has been found, use it
+ if ((cid != -1) && (_at->send("AT+UPSD=" PROFILE ",100,%d", cid) && _at->recv("OK"))) {
+ // Activate, waiting 30 seconds for the connection to be made
+ at_set_timeout(30000);
+ success = _at->send("AT+UPSDA=" PROFILE ",3") && _at->recv("OK");
+ at_set_timeout(at_timeout);
+ }
+
+ return success;
+}
+
+// Activate a profile by context ID.
+// Note: the AT interface should be locked before this is called.
+bool UbloxATCellularInterface::activate_profile_by_cid(int cid,
+ const char* apn,
+ const char* username,
+ const char* password,
+ nsapi_security_t auth)
+{
+ bool success = false;
+ int at_timeout = _at_timeout;
+
+ if (_at->send("AT+CGDCONT=%d,\"IP\",\"%s\"", cid, apn) && _at->recv("OK") &&
+ _at->send("AT+UAUTHREQ=%d,%d,\"%s\",\"%s\"", cid, nsapi_security_to_modem_security(auth),
+ username, password) && _at->recv("OK") &&
+ _at->send("AT+UPSD=" PROFILE ",100,%d", cid) && _at->recv("OK")) {
+
+ // Wait 30 seconds for the connection to be made
+ at_set_timeout(30000);
+ // Activate the protocol
+ success = _at->send("AT+UPSDA=" PROFILE ",3") && _at->recv("OK");
+ at_set_timeout(at_timeout);
+ }
+
+ return success;
+}
+
+// Connect the on board IP stack of the modem.
+bool UbloxATCellularInterface::connect_modem_stack()
+{
+ bool success = false;
+ int active = 0;
+ const char * config = NULL;
+ LOCK();
+
+ // Check the profile
+ if (_at->send("AT+UPSND=" PROFILE ",8") && _at->recv("+UPSND: %*d,%*d,%d\n", &active) &&
+ _at->recv("OK")) {
+ if (active == 0) {
+ // If the caller hasn't entered an APN, try to find it
+ if (_apn == NULL) {
+ config = apnconfig(_dev_info.imsi);
+ }
+
+ // Attempt to connect
+ do {
+ // Set up APN and IP protocol for PDP context
+ get_next_credentials(config);
+ _auth = (*_uname && *_pwd) ? _auth : NSAPI_SECURITY_NONE;
+ if ((_dev_info.dev != DEV_TOBY_L2) && (_dev_info.dev != DEV_MPCI_L2)) {
+ success = activate_profile(_apn, _uname, _pwd, _auth);
+ } else {
+ success = activate_profile_reuse_external();
+ if (success) {
+ tr_debug("Reusing external context");
+ } else {
+ success = activate_profile_by_cid(1, _apn, _uname, _pwd, _auth);
+ }
+ }
+ } while (!success && config && *config);
+ } else {
+ // If the profile is already active, we're good
+ success = true;
+ }
+ }
+
+ if (!success) {
+ tr_error("Failed to connect, check your APN/username/password");
+ }
+
+ UNLOCK();
+ return success;
+}
+
+// Disconnect the on board IP stack of the modem.
+bool UbloxATCellularInterface::disconnect_modem_stack()
+{
+ bool success = false;
+ LOCK();
+
+ if (get_ip_address() != NULL) {
+ if (_at->send("AT+UPSDA=" PROFILE ",4") && _at->recv("OK")) {
+ success = true;
+ if (_connection_status_cb) {
+ _connection_status_cb(NSAPI_ERROR_CONNECTION_LOST);
+ }
+ }
+ }
+
+ UNLOCK();
+ return success;
+}
+
+/**********************************************************************
+ * PROTECTED METHODS: NETWORK INTERFACE and SOCKETS
+ **********************************************************************/
+
+// Gain access to us.
+NetworkStack *UbloxATCellularInterface::get_stack()
+{
+ return this;
+}
+
+// Create a socket.
+nsapi_error_t UbloxATCellularInterface::socket_open(nsapi_socket_t *handle,
+ nsapi_protocol_t proto)
+{
+ nsapi_error_t nsapi_error = NSAPI_ERROR_DEVICE_ERROR;
+ bool success = false;
+ int modem_handle;
+ SockCtrl *socket;
+ LOCK();
+
+ // Find a free socket
+ socket = find_socket();
+ tr_debug("socket_open(%d)", proto);
+
+ if (socket != NULL) {
+ if (proto == NSAPI_UDP) {
+ success = _at->send("AT+USOCR=17");
+ } else if (proto == NSAPI_TCP) {
+ success = _at->send("AT+USOCR=6");
+ } else {
+ nsapi_error = NSAPI_ERROR_UNSUPPORTED;
+ }
+
+ if (success) {
+ nsapi_error = NSAPI_ERROR_NO_SOCKET;
+ if (_at->recv("+USOCR: %d\n", &modem_handle) && (modem_handle != SOCKET_UNUSED) &&
+ _at->recv("OK")) {
+ tr_debug("Socket 0x%8x: handle %d was created", (unsigned int) socket, modem_handle);
+ clear_socket(socket);
+ socket->modem_handle = modem_handle;
+ *handle = (nsapi_socket_t) socket;
+ nsapi_error = NSAPI_ERROR_OK;
+ }
+ }
+ } else {
+ nsapi_error = NSAPI_ERROR_NO_MEMORY;
+ }
+
+ UNLOCK();
+ return nsapi_error;
+}
+
+// Close a socket.
+nsapi_error_t UbloxATCellularInterface::socket_close(nsapi_socket_t handle)
+{
+ nsapi_error_t nsapi_error = NSAPI_ERROR_DEVICE_ERROR;
+ SockCtrl *socket = (SockCtrl *) handle;
+ LOCK();
+
+ tr_debug("socket_close(0x%08x)", (unsigned int) handle);
+
+ MBED_ASSERT (check_socket(socket));
+
+ if (_at->send("AT+USOCL=%d", socket->modem_handle) &&
+ _at->recv("OK")) {
+ clear_socket(socket);
+ nsapi_error = NSAPI_ERROR_OK;
+ }
+
+ UNLOCK();
+ return nsapi_error;
+}
+
+// Bind a local port to a socket.
+nsapi_error_t UbloxATCellularInterface::socket_bind(nsapi_socket_t handle,
+ const SocketAddress &address)
+{
+ nsapi_error_t nsapi_error = NSAPI_ERROR_NO_SOCKET;
+ int proto;
+ int modem_handle;
+ SockCtrl savedSocket;
+ SockCtrl *socket = (SockCtrl *) handle;
+ LOCK();
+
+ tr_debug("socket_bind(0x%08x, :%d)", (unsigned int) handle, address.get_port());
+
+ MBED_ASSERT (check_socket(socket));
+
+ // Query the socket type
+ if (_at->send("AT+USOCTL=%d,0", socket->modem_handle) &&
+ _at->recv("+USOCTL: %*d,0,%d\n", &proto) &&
+ _at->recv("OK")) {
+ savedSocket = *socket;
+ nsapi_error = NSAPI_ERROR_DEVICE_ERROR;
+ // Now close the socket and re-open it with the binding given
+ if (_at->send("AT+USOCL=%d", socket->modem_handle) &&
+ _at->recv("OK")) {
+ clear_socket(socket);
+ nsapi_error = NSAPI_ERROR_CONNECTION_LOST;
+ if (_at->send("AT+USOCR=%d,%d", proto, address.get_port()) &&
+ _at->recv("+USOCR: %d\n", &modem_handle) && (modem_handle != SOCKET_UNUSED) &&
+ _at->recv("OK")) {
+ *socket = savedSocket;
+ nsapi_error = NSAPI_ERROR_OK;
+ }
+ }
+ }
+
+ UNLOCK();
+ return nsapi_error;
+}
+
+// Connect to a socket
+nsapi_error_t UbloxATCellularInterface::socket_connect(nsapi_socket_t handle,
+ const SocketAddress &address)
+{
+ nsapi_error_t nsapi_error = NSAPI_ERROR_DEVICE_ERROR;
+ SockCtrl *socket = (SockCtrl *) handle;
+ LOCK();
+
+ tr_debug("socket_connect(0x%08x, %s(:%d))", (unsigned int) handle,
+ address.get_ip_address(), address.get_port());
+
+ MBED_ASSERT (check_socket(socket));
+
+ if (_at->send("AT+USOCO=%d,\"%s\",%d", socket->modem_handle,
+ address.get_ip_address(), address.get_port()) &&
+ _at->recv("OK")) {
+ nsapi_error = NSAPI_ERROR_OK;
+ }
+
+ UNLOCK();
+ return nsapi_error;
+}
+
+// Send to a socket.
+nsapi_size_or_error_t UbloxATCellularInterface::socket_send(nsapi_socket_t handle,
+ const void *data,
+ nsapi_size_t size)
+{
+ nsapi_size_or_error_t nsapi_error_size = NSAPI_ERROR_DEVICE_ERROR;
+ bool success = true;
+ const char *buf = (const char *) data;
+ nsapi_size_t blk = MAX_WRITE_SIZE;
+ nsapi_size_t count = size;
+ SockCtrl *socket = (SockCtrl *) handle;
+
+ tr_debug("socket_send(0x%08x, 0x%08x, %d)", (unsigned int) handle, (unsigned int) data, size);
+
+ MBED_ASSERT (check_socket(socket));
+
+ while ((count > 0) && success) {
+ if (count < blk) {
+ blk = count;
+ }
+ LOCK();
+
+ if (_at->send("AT+USOWR=%d,%d", socket->modem_handle, blk) && _at->recv("@")) {
+ wait_ms(50);
+ if ((_at->write(buf, blk) < (int) blk) ||
+ !_at->recv("OK")) {
+ success = false;
+ }
+ } else {
+ success = false;
+ }
+
+ UNLOCK();
+ buf += blk;
+ count -= blk;
+ }
+
+ if (success) {
+ nsapi_error_size = size - count;
+ if (_debug_trace_on) {
+ tr_debug("socket_send: %d \"%*.*s\"", size, size, size, (char *) data);
+ }
+ }
+
+ return nsapi_error_size;
+}
+
+// Send to an IP address.
+nsapi_size_or_error_t UbloxATCellularInterface::socket_sendto(nsapi_socket_t handle,
+ const SocketAddress &address,
+ const void *data,
+ nsapi_size_t size)
+{
+ nsapi_size_or_error_t nsapi_error_size = NSAPI_ERROR_DEVICE_ERROR;
+ bool success = true;
+ const char *buf = (const char *) data;
+ nsapi_size_t blk = MAX_WRITE_SIZE;
+ nsapi_size_t count = size;
+ SockCtrl *socket = (SockCtrl *) handle;
+
+ tr_debug("socket_sendto(0x%8x, %s(:%d), 0x%08x, %d)", (unsigned int) handle,
+ address.get_ip_address(), address.get_port(), (unsigned int) data, size);
+
+ MBED_ASSERT (check_socket(socket));
+
+ if (size > MAX_WRITE_SIZE) {
+ tr_warn("WARNING: packet length %d is too big for one UDP packet (max %d), will be fragmented.", size, MAX_WRITE_SIZE);
+ }
+
+ while ((count > 0) && success) {
+ if (count < blk) {
+ blk = count;
+ }
+ LOCK();
+
+ if (_at->send("AT+USOST=%d,\"%s\",%d,%d", socket->modem_handle,
+ address.get_ip_address(), address.get_port(), blk) &&
+ _at->recv("@")) {
+ wait_ms(50);
+ if ((_at->write(buf, blk) >= (int) blk) &&
+ _at->recv("OK")) {
+ } else {
+ success = false;
+ }
+ } else {
+ success = false;
+ }
+
+ UNLOCK();
+ buf += blk;
+ count -= blk;
+ }
+
+ if (success) {
+ nsapi_error_size = size - count;
+ if (_debug_trace_on) {
+ tr_debug("socket_sendto: %d \"%*.*s\"", size, size, size, (char *) data);
+ }
+ }
+
+ return nsapi_error_size;
+}
+
+// Receive from a socket, TCP style.
+nsapi_size_or_error_t UbloxATCellularInterface::socket_recv(nsapi_socket_t handle,
+ void *data,
+ nsapi_size_t size)
+{
+ nsapi_size_or_error_t nsapi_error_size = NSAPI_ERROR_DEVICE_ERROR;
+ bool success = true;
+ char *buf = (char *) data;
+ nsapi_size_t read_blk;
+ nsapi_size_t count = 0;
+ unsigned int usord_sz;
+ int read_sz;
+ Timer timer;
+ SockCtrl *socket = (SockCtrl *) handle;
+ int at_timeout;
+
+ tr_debug("socket_recv(0x%08x, 0x%08x, %d)",
+ (unsigned int) handle, (unsigned int) data, size);
+
+ MBED_ASSERT (check_socket(socket));
+
+ timer.start();
+
+ while (success && (size > 0)) {
+ LOCK();
+ at_timeout = _at_timeout;
+ at_set_timeout(1000);
+
+ read_blk = MAX_READ_SIZE;
+ if (read_blk > size) {
+ read_blk = size;
+ }
+ if (socket->pending > 0) {
+ tr_debug("Socket 0x%08x: modem handle %d has %d byte(s) pending",
+ (unsigned int) socket, socket->modem_handle, socket->pending);
+ _at->debug_on(false); // ABSOLUTELY no time for debug here if you want to
+ // be able to read packets of any size without
+ // losing characters in UARTSerial
+ if (_at->send("AT+USORD=%d,%d", socket->modem_handle, read_blk) &&
+ _at->recv("+USORD: %*d,%d,\"", &usord_sz)) {
+ socket->pending -= usord_sz; // Must use what +USORD returns here as it
+ // may be less than we asked for
+ // Note: insert no debug between _at->recv() and _at->read(), no time...
+ if (usord_sz > size) {
+ usord_sz = size;
+ }
+ read_sz = _at->read(buf, usord_sz);
+ if (read_sz > 0) {
+ tr_debug("...read %d byte(s) from modem handle %d...", read_sz,
+ socket->modem_handle);
+ if (_debug_trace_on) {
+ tr_debug("Read returned %d, |%*.*s|", read_sz, read_sz, read_sz, buf);
+ }
+ count += read_sz;
+ buf += read_sz;
+ size -= read_sz;
+ } else {
+ // read() should not fail
+ success = false;
+ }
+ tr_debug("Socket 0x%08x: modem handle %d now has only %d byte(s) pending",
+ (unsigned int) socket, socket->modem_handle, socket->pending);
+ // Wait for the "OK" before continuing
+ _at->recv("OK");
+ } else {
+ // Should never fail to do _at->send()/_at->recv()
+ success = false;
+ }
+ _at->debug_on(_debug_trace_on);
+ } else if (timer.read_ms() < SOCKET_TIMEOUT) {
+ // Wait for URCs
+ _at->recv(UNNATURAL_STRING);
+ } else {
+ if (count == 0) {
+ // Timeout with nothing received
+ nsapi_error_size = NSAPI_ERROR_WOULD_BLOCK;
+ success = false;
+ }
+ size = 0; // This simply to cause an exit
+ }
+
+ at_set_timeout(at_timeout);
+ UNLOCK();
+ }
+ timer.stop();
+
+ if (success) {
+ nsapi_error_size = count;
+ }
+
+ if (_debug_trace_on) {
+ tr_debug("socket_recv: %d \"%*.*s\"", count, count, count, buf - count);
+ } else {
+ tr_debug("socket_recv: received %d byte(s)", count);
+ }
+
+ return nsapi_error_size;
+}
+
+// Receive a packet over a UDP socket.
+nsapi_size_or_error_t UbloxATCellularInterface::socket_recvfrom(nsapi_socket_t handle,
+ SocketAddress *address,
+ void *data,
+ nsapi_size_t size)
+{
+ nsapi_size_or_error_t nsapi_error_size = NSAPI_ERROR_DEVICE_ERROR;
+ bool success = true;
+ char *buf = (char *) data;
+ nsapi_size_t read_blk;
+ nsapi_size_t count = 0;
+ char ipAddress[NSAPI_IP_SIZE];
+ int port;
+ unsigned int usorf_sz;
+ int read_sz;
+ Timer timer;
+ SockCtrl *socket = (SockCtrl *) handle;
+ int at_timeout;
+
+ tr_debug("socket_recvfrom(0x%08x, 0x%08x, %d)",
+ (unsigned int) handle, (unsigned int) data, size);
+
+ MBED_ASSERT (check_socket(socket));
+
+ timer.start();
+
+ while (success && (size > 0)) {
+ LOCK();
+ at_timeout = _at_timeout;
+ at_set_timeout(1000);
+
+ read_blk = MAX_READ_SIZE;
+ if (read_blk > size) {
+ read_blk = size;
+ }
+ if (socket->pending > 0) {
+ tr_debug("Socket 0x%08x: modem handle %d has %d byte(s) pending",
+ (unsigned int) socket, socket->modem_handle, socket->pending);
+ memset (ipAddress, 0, sizeof (ipAddress)); // Ensure terminator
+
+ // Note: the maximum length of UDP packet we can receive comes from
+ // fitting all of the following into one buffer:
+ //
+ // +USORF: xx,"max.len.ip.address.ipv4.or.ipv6",yyyyy,wwww,"the_data"\r\n
+ //
+ // where xx is the handle, max.len.ip.address.ipv4.or.ipv6 is NSAPI_IP_SIZE,
+ // yyyyy is the port number (max 65536), wwww is the length of the data and
+ // the_data is binary data. I make that 29 + 48 + len(the_data),
+ // so the overhead is 77 bytes.
+
+ _at->debug_on(false); // ABSOLUTELY no time for debug here if you want to
+ // be able to read packets of any size without
+ // losing characters in UARTSerial
+ if (_at->send("AT+USORF=%d,%d", socket->modem_handle, read_blk) &&
+ _at->recv("+USORF: %*d,\"%" u_stringify(NSAPI_IP_SIZE) "[^\"]\",%d,%d,\"",
+ ipAddress, &port, &usorf_sz)) {
+ socket->pending -= usorf_sz; // Must use what +USORF returns here as it
+ // may be less than we asked for
+ // Note: insert no debug between _at->recv() and _at->read(), no time...
+ if (usorf_sz > size) {
+ usorf_sz = size;
+ }
+ read_sz = _at->read(buf, usorf_sz);
+ if (read_sz > 0) {
+ address->set_ip_address(ipAddress);
+ address->set_port(port);
+ tr_debug("...read %d byte(s) from modem handle %d...", read_sz,
+ socket->modem_handle);
+ if (_debug_trace_on) {
+ tr_debug("Read returned %d, |%*.*s|", read_sz, read_sz, read_sz, buf);
+ }
+ count += read_sz;
+ buf += read_sz;
+ size -= read_sz;
+ if ((usorf_sz < read_blk) || (usorf_sz == MAX_READ_SIZE)) {
+ size = 0; // If we've received less than we asked for, or
+ // the max size, then a whole UDP packet has arrived and
+ // this means DONE.
+ }
+ } else {
+ // read() should not fail
+ success = false;
+ }
+ tr_debug("Socket 0x%08x: modem handle %d now has only %d byte(s) pending",
+ (unsigned int) socket, socket->modem_handle, socket->pending);
+ // Wait for the "OK" before continuing
+ _at->recv("OK");
+ } else {
+ // Should never fail to do _at->send()/_at->recv()
+ success = false;
+ }
+ _at->debug_on(_debug_trace_on);
+ } else if (timer.read_ms() < SOCKET_TIMEOUT) {
+ // Wait for URCs
+ _at->recv(UNNATURAL_STRING);
+ } else {
+ if (count == 0) {
+ // Timeout with nothing received
+ nsapi_error_size = NSAPI_ERROR_WOULD_BLOCK;
+ success = false;
+ }
+ size = 0; // This simply to cause an exit
+ }
+
+ at_set_timeout(at_timeout);
+ UNLOCK();
+ }
+ timer.stop();
+
+ if (success) {
+ nsapi_error_size = count;
+ }
+
+ if (_debug_trace_on) {
+ tr_debug("socket_recvfrom: %d \"%*.*s\"", count, count, count, buf - count);
+ } else {
+ tr_debug("socket_recvfrom: received %d byte(s)", count);
+ }
+
+ return nsapi_error_size;
+}
+
+// Attach an event callback to a socket, required for asynchronous
+// data reception
+void UbloxATCellularInterface::socket_attach(nsapi_socket_t handle,
+ void (*callback)(void *),
+ void *data)
+{
+ SockCtrl *socket = (SockCtrl *) handle;
+
+ MBED_ASSERT (check_socket(socket));
+
+ socket->callback = callback;
+ socket->data = data;
+}
+
+// Unsupported TCP server functions.
+nsapi_error_t UbloxATCellularInterface::socket_listen(nsapi_socket_t handle,
+ int backlog)
+{
+ return NSAPI_ERROR_UNSUPPORTED;
+}
+nsapi_error_t UbloxATCellularInterface::socket_accept(nsapi_socket_t server,
+ nsapi_socket_t *handle,
+ SocketAddress *address)
+{
+ return NSAPI_ERROR_UNSUPPORTED;
+}
+
+// Unsupported option functions.
+nsapi_error_t UbloxATCellularInterface::setsockopt(nsapi_socket_t handle,
+ int level, int optname,
+ const void *optval,
+ unsigned optlen)
+{
+ return NSAPI_ERROR_UNSUPPORTED;
+}
+nsapi_error_t UbloxATCellularInterface::getsockopt(nsapi_socket_t handle,
+ int level, int optname,
+ void *optval,
+ unsigned *optlen)
+{
+ return NSAPI_ERROR_UNSUPPORTED;
+}
+
+/**********************************************************************
+ * PUBLIC METHODS
+ **********************************************************************/
+
+// Constructor.
+UbloxATCellularInterface::UbloxATCellularInterface(PinName tx,
+ PinName rx,
+ int baud,
+ bool debug_on)
+{
+ _sim_pin_check_change_pending = false;
+ _sim_pin_check_change_pending_enabled_value = false;
+ _sim_pin_change_pending = false;
+ _sim_pin_change_pending_new_pin_value = NULL;
+ _apn = NULL;
+ _uname = NULL;
+ _pwd = NULL;
+ _connection_status_cb = NULL;
+
+ // Initialise sockets storage
+ memset(_sockets, 0, sizeof(_sockets));
+ for (unsigned int socket = 0; socket < sizeof(_sockets) / sizeof(_sockets[0]); socket++) {
+ _sockets[socket].modem_handle = SOCKET_UNUSED;
+ _sockets[socket].callback = NULL;
+ _sockets[socket].data = NULL;
+ }
+
+ // The authentication to use
+ _auth = NSAPI_SECURITY_UNKNOWN;
+
+ // Nullify the temporary IP address storage
+ _ip = NULL;
+
+ // Initialise the base class, which starts the AT parser
+ baseClassInit(tx, rx, baud, debug_on);
+
+ // Start the event handler thread for Rx data
+ event_thread.start(callback(this, &UbloxATCellularInterface::handle_event));
+
+ // URC handlers for sockets
+ _at->oob("+UUSORD", callback(this, &UbloxATCellularInterface::UUSORD_URC));
+ _at->oob("+UUSORF", callback(this, &UbloxATCellularInterface::UUSORF_URC));
+ _at->oob("+UUSOCL", callback(this, &UbloxATCellularInterface::UUSOCL_URC));
+ _at->oob("+UUPSDD", callback(this, &UbloxATCellularInterface::UUPSDD_URC));
+}
+
+// Destructor.
+UbloxATCellularInterface::~UbloxATCellularInterface()
+{
+ // Free _ip if it was ever allocated
+ free(_ip);
+}
+
+// Set the authentication scheme.
+void UbloxATCellularInterface::set_authentication(nsapi_security_t auth)
+{
+ _auth = auth;
+}
+
+// Set APN, user name and password.
+void UbloxATCellularInterface::set_credentials(const char *apn,
+ const char *uname,
+ const char *pwd)
+{
+ _apn = apn;
+ _uname = uname;
+ _pwd = pwd;
+}
+
+// Set PIN.
+void UbloxATCellularInterface::set_sim_pin(const char *pin) {
+ set_pin(pin);
+}
+
+// Get the IP address of a host.
+nsapi_error_t UbloxATCellularInterface::gethostbyname(const char *host,
+ SocketAddress *address,
+ nsapi_version_t version)
+{
+ nsapi_error_t nsapi_error = NSAPI_ERROR_DEVICE_ERROR;
+ char ipAddress[NSAPI_IP_SIZE];
+
+ if (address->set_ip_address(host)) {
+ nsapi_error = NSAPI_ERROR_OK;
+ } else {
+ LOCK();
+ memset (ipAddress, 0, sizeof (ipAddress)); // Ensure terminator
+ if (_at->send("AT+UDNSRN=0,\"%s\"", host) &&
+ _at->recv("+UDNSRN: \"%" u_stringify(NSAPI_IP_SIZE) "[^\"]\"", ipAddress) &&
+ _at->recv("OK")) {
+ if (address->set_ip_address(ipAddress)) {
+ nsapi_error = NSAPI_ERROR_OK;
+ }
+ }
+ UNLOCK();
+ }
+
+ return nsapi_error;
+}
+
+// Make a cellular connection
+nsapi_error_t UbloxATCellularInterface::connect(const char *sim_pin,
+ const char *apn,
+ const char *uname,
+ const char *pwd)
+{
+ nsapi_error_t nsapi_error;
+
+ if (sim_pin != NULL) {
+ _pin = sim_pin;
+ }
+
+ if (apn != NULL) {
+ _apn = apn;
+ }
+
+ if ((uname != NULL) && (pwd != NULL)) {
+ _uname = uname;
+ _pwd = pwd;
+ } else {
+ _uname = NULL;
+ _pwd = NULL;
+ }
+
+ nsapi_error = connect();
+
+ return nsapi_error;
+}
+
+// Make a cellular connection using the IP stack on board the cellular modem
+nsapi_error_t UbloxATCellularInterface::connect()
+{
+ nsapi_error_t nsapi_error = NSAPI_ERROR_DEVICE_ERROR;
+ bool registered = false;
+
+ // Set up modem and then register with the network
+ if (init()) {
+ nsapi_error = NSAPI_ERROR_NO_CONNECTION;
+ // Perform any pending SIM actions
+ if (_sim_pin_check_change_pending) {
+ if (!sim_pin_check_enable(_sim_pin_check_change_pending_enabled_value)) {
+ nsapi_error = NSAPI_ERROR_AUTH_FAILURE;
+ }
+ _sim_pin_check_change_pending = false;
+ }
+ if (_sim_pin_change_pending) {
+ if (!change_sim_pin(_sim_pin_change_pending_new_pin_value)) {
+ nsapi_error = NSAPI_ERROR_AUTH_FAILURE;
+ }
+ _sim_pin_change_pending = false;
+ }
+
+ if (nsapi_error == NSAPI_ERROR_NO_CONNECTION) {
+ for (int retries = 0; !registered && (retries < 3); retries++) {
+ if (nwk_registration()) {
+ registered = true;;
+ }
+ }
+ }
+ }
+
+ // Attempt to establish a connection
+ if (registered && connect_modem_stack()) {
+ nsapi_error = NSAPI_ERROR_OK;
+ }
+
+ return nsapi_error;
+}
+
+// User initiated disconnect.
+nsapi_error_t UbloxATCellularInterface::disconnect()
+{
+ nsapi_error_t nsapi_error = NSAPI_ERROR_DEVICE_ERROR;
+
+ if (disconnect_modem_stack() && nwk_deregistration()) {
+ nsapi_error = NSAPI_ERROR_OK;
+ }
+
+ return nsapi_error;
+}
+
+// Enable or disable SIM PIN check lock.
+nsapi_error_t UbloxATCellularInterface::set_sim_pin_check(bool set,
+ bool immediate,
+ const char *sim_pin)
+{
+ nsapi_error_t nsapi_error = NSAPI_ERROR_AUTH_FAILURE;
+
+ if (sim_pin != NULL) {
+ _pin = sim_pin;
+ }
+
+ if (immediate) {
+ if (init()) {
+ if (sim_pin_check_enable(set)) {
+ nsapi_error = NSAPI_ERROR_OK;
+ }
+ } else {
+ nsapi_error = NSAPI_ERROR_DEVICE_ERROR;
+ }
+ } else {
+ nsapi_error = NSAPI_ERROR_OK;
+ _sim_pin_check_change_pending = true;
+ _sim_pin_check_change_pending_enabled_value = set;
+ }
+
+ return nsapi_error;
+}
+
+// Change the PIN code for the SIM card.
+nsapi_error_t UbloxATCellularInterface::set_new_sim_pin(const char *new_pin,
+ bool immediate,
+ const char *old_pin)
+{
+ nsapi_error_t nsapi_error = NSAPI_ERROR_AUTH_FAILURE;
+
+ if (old_pin != NULL) {
+ _pin = old_pin;
+ }
+
+ if (immediate) {
+ if (init()) {
+ if (change_sim_pin(new_pin)) {
+ nsapi_error = NSAPI_ERROR_OK;
+ }
+ } else {
+ nsapi_error = NSAPI_ERROR_DEVICE_ERROR;
+ }
+ } else {
+ nsapi_error = NSAPI_ERROR_OK;
+ _sim_pin_change_pending = true;
+ _sim_pin_change_pending_new_pin_value = new_pin;
+ }
+
+ return nsapi_error;
+}
+
+// Determine if the connection is up.
+bool UbloxATCellularInterface::is_connected()
+{
+ return get_ip_address() != NULL;
+}
+
+// Get the IP address of the on-board modem IP stack.
+const char * UbloxATCellularInterface::get_ip_address()
+{
+ SocketAddress address;
+ LOCK();
+
+ if (_ip == NULL) {
+ // Temporary storage for an IP address string with terminator
+ _ip = (char *) malloc(NSAPI_IP_SIZE);
+ }
+
+ if (_ip != NULL) {
+ memset(_ip, 0, NSAPI_IP_SIZE); // Ensure a terminator
+ // +UPSND=<profile_id>,<param_tag>[,<dynamic_param_val>]
+ // If we get back a quoted "w.x.y.z" then we have an IP address,
+ // otherwise we don't.
+ if (!_at->send("AT+UPSND=" PROFILE ",0") ||
+ !_at->recv("+UPSND: " PROFILE ",0,\"%" u_stringify(NSAPI_IP_SIZE) "[^\"]\"", _ip) ||
+ !_at->recv("OK") ||
+ !address.set_ip_address(_ip) || // Return NULL if the address is not a valid one
+ !address) { // Return null if the address is zero
+ free (_ip);
+ _ip = NULL;
+ }
+ }
+
+ UNLOCK();
+ return _ip;
+}
+
+// Get the local network mask.
+const char *UbloxATCellularInterface::get_netmask()
+{
+ // Not implemented.
+ return NULL;
+}
+
+// Get the local gateways.
+const char *UbloxATCellularInterface::get_gateway()
+{
+ return get_ip_address();
+}
+
+// Callback in case the connection is lost.
+void UbloxATCellularInterface::connection_status_cb(Callback<void(nsapi_error_t)> cb)
+{
+ _connection_status_cb = cb;
+}
+
+// End of file
+