Lancaster University
Lancaster University's fork of the mbed BLE API. Lives on github, https://github.com/lancaster-university/BLE_API
Dependents: microbit-dal microbit-dal microbit-ble-open microbit-dal ... more
Fork of
BLE_API
by 
Bluetooth Low Energy
Diff: ble/services/EddystoneService.h
- Revision:
- 918:2b12b53101ea
diff -r e8b69bf06f24 -r 2b12b53101ea ble/services/EddystoneService.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ble/services/EddystoneService.h Thu Nov 26 12:52:04 2015 +0000
@@ -0,0 +1,651 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2015 ARM 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.
+ */
+
+#ifndef SERVICES_EDDYSTONEBEACON_H_
+#define SERVICES_EDDYSTONEBEACON_H_
+
+#include "ble/BLE.h"
+#include "mbed.h"
+#include "CircularBuffer.h"
+static const uint8_t BEACON_EDDYSTONE[] = {0xAA, 0xFE};
+
+//Debug is disabled by default
+#if 0
+#define DBG(MSG, ...) printf("[EddyStone: DBG]" MSG " \t[%s,%d]\r\n", \
+ ## __VA_ARGS__, \
+ __FILE__, \
+ __LINE__);
+#define WARN(MSG, ...) printf("[EddyStone: WARN]" MSG " \t[%s,%d]\r\n", \
+ ## __VA_ARGS__, \
+ __FILE__, \
+ __LINE__);
+#define ERR(MSG, ...) printf("[EddyStone: ERR]" MSG " \t[%s,%d]\r\n", \
+ ## __VA_ARGS__, \
+ __FILE__, \
+ __LINE__);
+#else // if 0
+#define DBG(x, ...) //wait_us(10);
+#define WARN(x, ...) //wait_us(10);
+#define ERR(x, ...)
+#endif // if 0
+
+#if 0
+#define INFO(x, ...) printf("[EddyStone: INFO]"x " \t[%s,%d]\r\n", \
+ ## __VA_ARGS__, \
+ __FILE__, \
+ __LINE__);
+#else // if 0
+#define INFO(x, ...)
+#endif // if 0
+
+/**
+* @class Eddystone
+* @brief Eddystone Configuration Service. Can be used to set URL, adjust power levels, and set flags.
+* See https://github.com/google/eddystone
+*
+*/
+class EddystoneService
+{
+public:
+ enum FrameTypes {
+ NONE,
+ url,
+ uid,
+ tlm
+ };
+
+ static const int SERVICE_DATA_MAX = 31; // Maximum size of service data in ADV packets
+
+ // There are currently 3 subframes defined, URI, UID, and TLM
+#define EDDYSTONE_MAX_FRAMETYPE 3
+ void (*frames[EDDYSTONE_MAX_FRAMETYPE])(uint8_t *, uint32_t);
+ static const int URI_DATA_MAX = 18;
+ typedef uint8_t UriData_t[URI_DATA_MAX];
+ CircularBuffer<FrameTypes, EDDYSTONE_MAX_FRAMETYPE> overflow;
+
+ // UID Frame Type subfields
+ static const int UID_NAMESPACEID_SIZE = 10;
+ typedef uint8_t UIDNamespaceID_t[UID_NAMESPACEID_SIZE];
+ static const int UID_INSTANCEID_SIZE = 6;
+ typedef uint8_t UIDInstanceID_t[UID_INSTANCEID_SIZE];
+
+ // Eddystone Frame Type ID
+ static const uint8_t FRAME_TYPE_UID = 0x00;
+ static const uint8_t FRAME_TYPE_URL = 0x10;
+ static const uint8_t FRAME_TYPE_TLM = 0x20;
+
+ static const uint8_t FRAME_SIZE_TLM = 14; // TLM frame is a constant 14Bytes
+ static const uint8_t FRAME_SIZE_UID = 20; // includes RFU bytes
+
+ /**
+ * Set Eddystone UID Frame information.
+ *
+ * @param[in] power TX Power in dB measured at 0 meters from the device. Range of -100 to +20 dB.
+ * @param[in] namespaceID 10B namespace ID
+ * @param[in] instanceID 6B instance ID
+ * @param[in] RFU 2B of RFU, initialized to 0x0000 and not broadcast, included for future reference.
+ */
+ void setUIDFrameData(int8_t power,
+ UIDNamespaceID_t namespaceID,
+ UIDInstanceID_t instanceID,
+ float uidAdvPeriodIn,
+ uint16_t RFU = 0x0000) {
+ if (0.0f == uidAdvPeriodIn) {
+ uidIsSet = false;
+ return;
+ }
+ if (power > 20) {
+ power = 20;
+ }
+ if (power < -100) {
+ power = -100;
+ }
+
+ defaultUidPower = power;
+ memcpy(defaultUidNamespaceID, namespaceID, UID_NAMESPACEID_SIZE);
+ memcpy(defaultUidInstanceID, instanceID, UID_INSTANCEID_SIZE);
+ uidRFU = (uint16_t)RFU; // this is probably bad form, but it doesn't really matter yet.
+ uidAdvPeriod = uidAdvPeriodIn;
+ uidIsSet = true; // set toggle to advertise UID frames
+ }
+
+ /*
+ * Construct UID frame from private variables
+ * @param[in/out] Data pointer to array to store constructed frame in
+ * @param[in] maxSize number of bytes left in array, effectively how much empty space is available to write to
+ * @return number of bytes used. negative number indicates error message.
+ */
+ unsigned constructUIDFrame(uint8_t *Data, uint8_t maxSize) {
+ unsigned index = 0;
+
+ Data[index++] = FRAME_TYPE_UID; // 1B Type
+
+ if (defaultUidPower > 20) {
+ defaultUidPower = 20; // enforce range of vaild values.
+ }
+ if (defaultUidPower < -100) {
+ defaultUidPower = -100;
+ }
+ Data[index++] = defaultUidPower; // 1B Power @ 0meter
+
+ DBG("UID NamespaceID = '0x");
+ for (size_t x = 0; x < UID_NAMESPACEID_SIZE; x++) { // 10B Namespace ID
+ Data[index++] = defaultUidNamespaceID[x];
+ DBG("%x,", defaultUidNamespaceID[x]);
+ }
+ DBG("'\r\n");
+
+ DBG("UID InstanceID = '0x");
+ for (size_t x = 0; x< UID_INSTANCEID_SIZE; x++) { // 6B Instance ID
+ Data[index++] = defaultUidInstanceID[x];
+ DBG("%x,", defaultUidInstanceID[x]);
+ }
+ DBG("'\r\n");
+
+ if (0 != uidRFU) { // 2B RFU, include if non-zero, otherwise ignore
+ Data[index++] = (uint8_t)(uidRFU >> 0);
+ Data[index++] = (uint8_t)(uidRFU >> 8);
+ }
+ DBG("construcUIDFrame %d, %d", maxSize, index);
+ return index;
+ }
+
+ /**
+ * Set Eddystone URL Frame information.
+ * @param[in] power TX Power in dB measured at 0 meters from the device.
+ * @param[in] url URL to encode
+ * @param[in] urlAdvPeriodIn How long to advertise the URL frame (measured in # of adv periods)
+ * @return false on success, true on failure.
+ */
+ bool setURLFrameData(int8_t power, const char *urlIn, float urlAdvPeriodIn) {
+ if (0.0f == urlAdvPeriodIn) {
+ urlIsSet = false;
+ return false;
+ }
+ encodeURL(urlIn, defaultUriData, defaultUriDataLength); // encode URL to URL Formatting
+ if (defaultUriDataLength > URI_DATA_MAX) {
+ return true; // error, URL is too big
+ }
+ defaultUrlPower = power;
+ urlAdvPeriod = urlAdvPeriodIn;
+ urlIsSet = true;
+ return false;
+ }
+
+ /**
+ * Set Eddystone URL Frame information.
+ * @param[in] power TX Power in dB measured at 0 meters from the device.
+ * @param[in] encodedUrlIn Encoded URL
+ * @param[in] encodedUrlInLength Length of the encoded URL
+ * @param[in] urlAdvPeriodIn How long to advertise the URL frame (measured in # of adv periods)
+ * @return false on success, true on failure.
+ */
+ bool setURLFrameEncodedData(int8_t power, const char *encodedUrlIn, uint8_t encodedUrlInLength, float urlAdvPeriodIn) {
+ if (0.0f == urlAdvPeriodIn) {
+ urlIsSet = false;
+ return false;
+ }
+ memcpy(defaultUriData, encodedUrlIn, encodedUrlInLength);
+ if (defaultUriDataLength > URI_DATA_MAX) {
+ return true; // error, URL is too big
+ }
+ defaultUrlPower = power;
+ defaultUriDataLength = encodedUrlInLength;
+ urlAdvPeriod = urlAdvPeriodIn;
+ urlIsSet = true;
+ return false;
+ }
+
+ /*
+ * Construct URL frame from private variables
+ * @param[in/out] Data pointer to array to store constructed frame in
+ * @param[in] maxSize number of bytes left in array, effectively how much emtpy space is available to write to
+ * @return number of bytes used. negative number indicates error message.
+ */
+ int constructURLFrame(uint8_t *Data, uint8_t maxSize) {
+ int index = 0;
+ Data[index++] = FRAME_TYPE_URL; // 1B Type
+ Data[index++] = defaultUrlPower; // 1B TX Power
+ for (int x = 0; x < defaultUriDataLength; x++) { // 18B of URL Prefix + encoded URL
+ Data[index++] = defaultUriData[x];
+ }
+ DBG("constructURLFrame: %d, %d", maxSize, index);
+ return index;
+ }
+
+ /*
+ * Set Eddystone TLM Frame information.
+ * @param[in] Version of the TLM beacon data format
+ * @param[in] advPeriod how often to advertise the TLM frame for (in minutes)
+ * @param batteryVoltage in milivolts
+ * @param beaconTemp in 8.8 floating point notation
+ *
+ */
+ void setTLMFrameData(uint8_t version = 0,
+ float advPeriod = 60.0f,
+ uint16_t batteryVoltage = 0,
+ uint16_t beaconTemp = 0x8000,
+ uint32_t pduCount = 0,
+ uint32_t timeSinceBoot = 0) {
+ if (0.0f == advPeriod) {
+ tlmIsSet = false;
+ return;
+ }
+ TlmVersion = version;
+ TlmBatteryVoltage = batteryVoltage;
+ TlmBeaconTemp = beaconTemp;
+ TlmPduCount = pduCount; // reset
+ TlmTimeSinceBoot = timeSinceBoot; // reset
+ TlmAdvPeriod = advPeriod;
+ tlmIsSet = true; // TLM Data has been enabled
+ }
+
+ /*
+ * Construct TLM frame from private variables
+ * @param[in/out] Data pointer to array to store constructed frame in
+ * @param[in] maxSize number of bytes left in array, effectively how much emtpy space is available to write to
+ * @return number of bytes used. negative number indicates error message.
+ */
+ int constructTLMFrame(uint8_t *Data, uint8_t maxSize) {
+ uint32_t now = timeSinceBootTimer.read_ms();
+ TlmTimeSinceBoot += (now - lastBootTimerRead) / 100;
+ lastBootTimerRead = now;
+
+ int index = 0;
+ Data[index++] = FRAME_TYPE_TLM; // Eddystone frame type = Telemetry
+ Data[index++] = TlmVersion; // TLM Version Number
+ Data[index++] = (uint8_t)(TlmBatteryVoltage >> 8); // Battery Voltage[0]
+ Data[index++] = (uint8_t)(TlmBatteryVoltage >> 0); // Battery Voltage[1]
+ Data[index++] = (uint8_t)(TlmBeaconTemp >> 8); // Beacon Temp[0]
+ Data[index++] = (uint8_t)(TlmBeaconTemp >> 0); // Beacon Temp[1]
+ Data[index++] = (uint8_t)(TlmPduCount >> 24); // PDU Count [0]
+ Data[index++] = (uint8_t)(TlmPduCount >> 16); // PDU Count [1]
+ Data[index++] = (uint8_t)(TlmPduCount >> 8); // PDU Count [2]
+ Data[index++] = (uint8_t)(TlmPduCount >> 0); // PDU Count [3]
+ Data[index++] = (uint8_t)(TlmTimeSinceBoot >> 24); // Time Since Boot [0]
+ Data[index++] = (uint8_t)(TlmTimeSinceBoot >> 16); // Time Since Boot [1]
+ Data[index++] = (uint8_t)(TlmTimeSinceBoot >> 8); // Time Since Boot [2]
+ Data[index++] = (uint8_t)(TlmTimeSinceBoot >> 0); // Time Since Boot [3]
+ DBG("constructURLFrame: %d, %d", maxSize, index);
+ return index;
+ }
+
+ /*
+ * Update the TLM frame battery voltage value
+ * @param[in] voltagemv Voltage to update the TLM field battery voltage with (in mV)
+ * @return nothing
+ */
+ void updateTlmBatteryVoltage(uint16_t voltagemv) {
+ TlmBatteryVoltage = voltagemv;
+ }
+
+ /*
+ * Update the TLM frame beacon temperature
+ * @param[in] temp Temperature of beacon (in 8.8fpn)
+ * @return nothing
+ */
+ void updateTlmBeaconTemp(uint16_t temp) {
+ TlmBeaconTemp = temp;
+ }
+
+ /*
+ * Update the TLM frame PDU Count field
+ * @param[in] pduCount Number of Advertisiting frames sent since powerup
+ * @return nothing
+ */
+ void updateTlmPduCount(uint32_t pduCount) {
+ TlmPduCount = pduCount;
+ }
+
+ /*
+ * Update the TLM frame Time since boot in 0.1s incriments
+ * @param[in] timeSinceBoot Time since boot in 0.1s incriments
+ * @return nothing
+ */
+ void updateTlmTimeSinceBoot(uint32_t timeSinceBoot) {
+ TlmTimeSinceBoot = timeSinceBoot;
+ }
+
+ /*
+ * Update advertising data
+ * @return true on success, false on failure
+ */
+ bool updateAdvPacket(uint8_t serviceData[], unsigned serviceDataLen) {
+ // Fields from the Service
+ DBG("Updating AdvFrame: %d", serviceDataLen);
+
+ ble.clearAdvertisingPayload();
+ ble.setAdvertisingType(GapAdvertisingParams::ADV_NON_CONNECTABLE_UNDIRECTED);
+ ble.setAdvertisingInterval(100);
+ ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
+ ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, BEACON_EDDYSTONE, sizeof(BEACON_EDDYSTONE));
+ ble.accumulateAdvertisingPayload(GapAdvertisingData::SERVICE_DATA, serviceData, serviceDataLen);
+
+
+ return true;
+ }
+
+ /*
+ * State machine for switching out frames.
+ * This function is called by the radioNotificationCallback when a frame needs to get swapped out.
+ * This function exists because of time constraints in the radioNotificationCallback, so it is effectively
+ * broken up into two functions.
+ */
+ void swapOutFrames(FrameTypes frameType) {
+ uint8_t serviceData[SERVICE_DATA_MAX];
+ unsigned serviceDataLen = 0;
+ //hard code in the eddystone UUID
+ serviceData[serviceDataLen++] = BEACON_EDDYSTONE[0];
+ serviceData[serviceDataLen++] = BEACON_EDDYSTONE[1];
+
+ // if certain frames are not enabled, then skip them. Worst case TLM is always enabled
+ switch (frameType) {
+ case tlm:
+ // TLM frame
+ if (tlmIsSet) {
+ DBG("Swapping in TLM Frame: version=%x, Batt=%d, Temp = %d, PDUCnt = %d, TimeSinceBoot=%d",
+ TlmVersion,
+ TlmBatteryVoltage,
+ TlmBeaconTemp,
+ TlmPduCount,
+ TlmTimeSinceBoot);
+ serviceDataLen += constructTLMFrame(serviceData + serviceDataLen, 20);
+ DBG("\t Swapping in TLM Frame: len=%d", serviceDataLen);
+ updateAdvPacket(serviceData, serviceDataLen);
+ }
+ break;
+ case url:
+ // URL Frame
+ if (urlIsSet) {
+ DBG("Swapping in URL Frame: Power: %d", defaultUrlPower);
+ serviceDataLen += constructURLFrame(serviceData + serviceDataLen, 20);
+ DBG("\t Swapping in URL Frame: len=%d ", serviceDataLen);
+ updateAdvPacket(serviceData, serviceDataLen);
+ //switchFlag = false;
+ }
+ break;
+ case uid:
+ // UID Frame
+ if (uidIsSet) {
+ DBG("Swapping in UID Frame: Power: %d", defaultUidPower);
+ serviceDataLen += constructUIDFrame(serviceData + serviceDataLen, 20);
+ DBG("\t Swapping in UID Frame: len=%d", serviceDataLen);
+ updateAdvPacket(serviceData, serviceDataLen);
+ //switchFlag = false;
+ }
+ break;
+ default:
+ ERR("You have not initialized a Frame yet, please initialize one before starting a beacon");
+ ERR("uidIsSet = %d, urlIsSet = %d, tlmIsSet = %d", uidIsSet, urlIsSet, tlmIsSet);
+ }
+ }
+
+ /*
+ * Callback to swap in URL frame
+ */
+ void urlCallback(void) {
+ DBG("urlCallback");
+ if (false == advLock) {
+ advLock = true;
+ DBG("advLock = url")
+ frameIndex = url;
+ swapOutFrames(frameIndex);
+ ble.startAdvertising();
+ } else {
+ // Someone else is broadcasting, toss it into the overflow buffer to retransmit when free
+ INFO("URI(%d) cannot complete, %d is currently broadcasting", url, frameIndex);
+ FrameTypes x = url;
+ overflow.push(x);
+ }
+ }
+
+ /*
+ * Callback to swap in UID frame
+ */
+ void uidCallback(void) {
+ DBG("uidCallback");
+ if (false == advLock) {
+ advLock = true;
+ DBG("advLock = uid")
+ frameIndex = uid;
+ swapOutFrames(frameIndex);
+ ble.startAdvertising();
+ } else {
+ // Someone else is broadcasting, toss it into the overflow buffer to retransmit when free
+ INFO("UID(%d) cannot complete, %d is currently broadcasting", uid, frameIndex);
+ FrameTypes x = uid; // have to do this to satisfy cont vs volatile keywords... sigh...
+ overflow.push(x);
+ }
+ }
+
+ /*
+ * Callback to swap in TLM frame
+ */
+ void tlmCallback(void) {
+ DBG("tlmCallback");
+ if (false == advLock) {
+ // OK to broadcast
+ advLock = true;
+ DBG("advLock = tlm")
+ frameIndex = tlm;
+ swapOutFrames(frameIndex);
+ ble.startAdvertising();
+ } else {
+ // Someone else is broadcasting, toss it into the overflow buffer to retransmit when free
+ INFO("TLM(%d) cannot complete, %d is currently broadcasting", tlm, frameIndex);
+ FrameTypes x = tlm;
+ overflow.push(x);
+ }
+ }
+
+ void stopAdvCallback(void) {
+ if (overflow.empty()) {
+ // if nothing left to transmit, stop
+ ble.stopAdvertising();
+ advLock = false; // unlock lock
+ } else {
+ // transmit other packets at current time index
+ FrameTypes x = NONE;
+ overflow.pop(x);
+ INFO("Re-Transmitting %d", x);
+ swapOutFrames(x);
+ }
+ }
+
+ /*
+ * Callback from onRadioNotification(), used to update the PDUCounter and process next state.
+ */
+#define EDDYSTONE_SWAPFRAME_DELAYMS 1
+ void radioNotificationCallback(bool radioActive) {
+ // Update PDUCount
+ TlmPduCount++;
+ // True just before an frame is sent, false just after a frame is sent
+ if (radioActive) {
+ // Do Nothing
+ } else {
+ // Packet has been sent, disable advertising
+ stopAdv.attach_us(this, &EddystoneService::stopAdvCallback, 1);
+ }
+ }
+
+ /*
+ * This function explicityly sets the parameters used by the Eddystone beacon.
+ * this function should be used in leu of the config service.
+ *
+ * @param bleIn ble object used to broadcast eddystone information
+ * @param beaconPeriodus is how often ble broadcasts are mde, in mili seconds
+ * @param txPowerLevel sets the broadcasting power level.
+ *
+ */
+ EddystoneService(BLEDevice &bleIn,
+ uint16_t beaconPeriodus = 100,
+ uint8_t txPowerIn = 0) :
+ ble(bleIn),
+ advPeriodus(beaconPeriodus),
+ txPower(txPowerIn),
+ advLock(false),
+ frameIndex(NONE) {
+ }
+
+ /*
+ * @breif this function starts eddystone advertising based on configured frames.
+ */
+ void start(void) {
+ // Initialize Frame transition, start with URL to pass eddystone validator app on first try
+ if (urlIsSet) {
+ frameIndex = url;
+ urlTicker.attach(this, &EddystoneService::urlCallback, (float) advPeriodus / 1000.0f);
+ DBG("attached urlCallback every %d seconds", urlAdvPeriod);
+ }
+ if (uidIsSet) {
+ frameIndex = uid;
+ uidTicker.attach(this, &EddystoneService::uidCallback, uidAdvPeriod);
+ DBG("attached uidCallback every %d seconds", uidAdvPeriod);
+ }
+ if (tlmIsSet) {
+ frameIndex = tlm;
+ // Make double sure the PDUCount and TimeSinceBoot fields are set to zero at reset
+ updateTlmPduCount(0);
+ updateTlmTimeSinceBoot(0);
+ lastBootTimerRead = 0;
+ timeSinceBootTimer.start();
+ tlmTicker.attach(this, &EddystoneService::tlmCallback, TlmAdvPeriod);
+ DBG("attached tlmCallback every %d seconds", TlmAdvPeriod);
+ }
+ if (NONE == frameIndex) {
+ error("No Frames were Initialized! Please initialize a frame before starting an eddystone beacon.");
+ }
+ //uidRFU = 0;
+
+ ble.setTxPower(txPower);
+ ble.gap().onRadioNotification(this, &EddystoneService::radioNotificationCallback);
+ }
+
+private:
+
+ // Eddystone Variables
+ BLEDevice &ble;
+ uint16_t advPeriodus;
+ uint8_t txPower;
+ Timer timeSinceBootTimer;
+ volatile uint32_t lastBootTimerRead;
+ volatile bool advLock;
+ volatile FrameTypes frameIndex;
+ Timeout stopAdv;
+
+
+ // URI Frame Variables
+ uint8_t defaultUriDataLength;
+ UriData_t defaultUriData;
+ int8_t defaultUrlPower;
+ bool urlIsSet; // flag that enables / disable URI Frames
+ float urlAdvPeriod; // how long the url frame will be advertised for
+ Ticker urlTicker;
+
+ // UID Frame Variables
+ UIDNamespaceID_t defaultUidNamespaceID;
+ UIDInstanceID_t defaultUidInstanceID;
+ int8_t defaultUidPower;
+ uint16_t uidRFU;
+ bool uidIsSet; // flag that enables / disable UID Frames
+ float uidAdvPeriod; // how long the uid frame will be advertised for
+ Ticker uidTicker;
+
+ // TLM Frame Variables
+ uint8_t TlmVersion;
+ volatile uint16_t TlmBatteryVoltage;
+ volatile uint16_t TlmBeaconTemp;
+ volatile uint32_t TlmPduCount;
+ volatile uint32_t TlmTimeSinceBoot;
+ bool tlmIsSet; // flag that enables / disables TLM frames
+ float TlmAdvPeriod; // number of minutes between adv frames
+ Ticker tlmTicker;
+
+public:
+ /*
+ * Encode a human-readable URI into the binary format defined by URIBeacon spec (https://github.com/google/uribeacon/tree/master/specification).
+ */
+ static void encodeURL(const char *uriDataIn, UriData_t uriDataOut, uint8_t &sizeofURIDataOut) {
+ DBG("Encode URL = %s", uriDataIn);
+ const char *prefixes[] = {
+ "http://www.",
+ "https://www.",
+ "http://",
+ "https://",
+ };
+ const size_t NUM_PREFIXES = sizeof(prefixes) / sizeof(char *);
+ const char *suffixes[] = {
+ ".com/",
+ ".org/",
+ ".edu/",
+ ".net/",
+ ".info/",
+ ".biz/",
+ ".gov/",
+ ".com",
+ ".org",
+ ".edu",
+ ".net",
+ ".info",
+ ".biz",
+ ".gov"
+ };
+ const size_t NUM_SUFFIXES = sizeof(suffixes) / sizeof(char *);
+
+ sizeofURIDataOut = 0;
+ memset(uriDataOut, 0, sizeof(UriData_t));
+
+ if ((uriDataIn == NULL) || (strlen(uriDataIn) == 0)) {
+ return;
+ }
+
+ /*
+ * handle prefix
+ */
+ for (unsigned i = 0; i < NUM_PREFIXES; i++) {
+ size_t prefixLen = strlen(prefixes[i]);
+ if (strncmp(uriDataIn, prefixes[i], prefixLen) == 0) {
+ uriDataOut[sizeofURIDataOut++] = i;
+ uriDataIn += prefixLen;
+ break;
+ }
+ }
+
+ /*
+ * handle suffixes
+ */
+ while (*uriDataIn && (sizeofURIDataOut < URI_DATA_MAX)) {
+ /* check for suffix match */
+ unsigned i;
+ for (i = 0; i < NUM_SUFFIXES; i++) {
+ size_t suffixLen = strlen(suffixes[i]);
+ if (strncmp(uriDataIn, suffixes[i], suffixLen) == 0) {
+ uriDataOut[sizeofURIDataOut++] = i;
+ uriDataIn += suffixLen;
+ break; /* from the for loop for checking against suffixes */
+ }
+ }
+ /* This is the default case where we've got an ordinary character which doesn't match a suffix. */
+ INFO("Encoding URI: No Suffix Found");
+ if (i == NUM_SUFFIXES) {
+ uriDataOut[sizeofURIDataOut++] = *uriDataIn;
+ ++uriDataIn;
+ }
+ }
+ }
+};
+
+#endif // SERVICES_EDDYSTONEBEACON_H_
\ No newline at end of file