Eric Tsai
2018-10-22: This is a temporary repository to fix issue mbed OS issue 8344. I'm reverting to an earlier mbed revision that isn't messed up. Expect mbed to fix the linker issue in the next release and I'll remove this repository. I havne't tested the code at this revision - sorry!
Dependencies: BLE_API mbed mbedtls nRF51822
main.cpp@14:c62c3a92aba7, 2018-10-23 (annotated)
- Committer:
- electronichamsters
- Date:
- Tue Oct 23 02:37:10 2018 +0000
- Revision:
- 14:c62c3a92aba7
- Parent:
- 13:e136665cf993
Super lazy linker fix to mbed issue 8344. Not tested, but "it should work"
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| electronichamsters | 14:c62c3a92aba7 | 1 | /* 2018-10-22: Note, this is a temporary gateway project to fix an issue with mbed linker |
| electronichamsters | 14:c62c3a92aba7 | 2 | * Original Program: https://os.mbed.com/users/electronichamsters/code/BLE_Gateway/ |
| electronichamsters | 14:c62c3a92aba7 | 3 | * mbed had some linker problems raised in issue 8344 |
| electronichamsters | 14:c62c3a92aba7 | 4 | * https://github.com/ARMmbed/mbed-os/issues/8344 |
| electronichamsters | 14:c62c3a92aba7 | 5 | * My temporary fix is to revert to a earlier revision of mbed. Devloper notes indicates |
| electronichamsters | 14:c62c3a92aba7 | 6 | * this will be cleaned up on mbed's side. |
| electronichamsters | 14:c62c3a92aba7 | 7 | * |
| electronichamsters | 13:e136665cf993 | 8 | * Copyright (c) Eric Tsai 2017 |
| electronichamsters | 13:e136665cf993 | 9 | * |
| electronichamsters | 13:e136665cf993 | 10 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| electronichamsters | 13:e136665cf993 | 11 | * you may not use this file except in compliance with the License. |
| electronichamsters | 13:e136665cf993 | 12 | * You may obtain a copy of the License at |
| electronichamsters | 13:e136665cf993 | 13 | * |
| electronichamsters | 13:e136665cf993 | 14 | * http://www.apache.org/licenses/LICENSE-2.0 |
| electronichamsters | 13:e136665cf993 | 15 | * |
| electronichamsters | 13:e136665cf993 | 16 | * Unless required by applicable law or agreed to in writing, software |
| electronichamsters | 13:e136665cf993 | 17 | * distributed under the License is distributed on an "AS IS" BASIS, |
| electronichamsters | 13:e136665cf993 | 18 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| electronichamsters | 13:e136665cf993 | 19 | * See the License for the specific language governing permissions and |
| electronichamsters | 13:e136665cf993 | 20 | * limitations under the License. |
| electronichamsters | 13:e136665cf993 | 21 | * |
| electronichamsters | 13:e136665cf993 | 22 | * |
| electronichamsters | 13:e136665cf993 | 23 | * Credit: I started with the basic BLE_Observer code from mbed Bluetooth Low Energy team |
| electronichamsters | 13:e136665cf993 | 24 | * https://developer.mbed.org/teams/Bluetooth-Low-Energy/code/BLE_Observer/file/88f50499af9a/main.cpp |
| electronichamsters | 13:e136665cf993 | 25 | * |
| electronichamsters | 13:e136665cf993 | 26 | * |
| electronichamsters | 13:e136665cf993 | 27 | * |
| electronichamsters | 13:e136665cf993 | 28 | * This BLE advertisement observer looks for specific advertisements from intended bacons |
| electronichamsters | 13:e136665cf993 | 29 | * and outputs beacon data as json over serial. Compiled and tested for nRF51822 on mbed. |
| electronichamsters | 11:d5edb6e3edab | 30 | */ |
| electronichamsters | 8:46c5e0bfab05 | 31 | |
| electronichamsters | 13:e136665cf993 | 32 | #include "mbed.h" //revision 148 |
| electronichamsters | 9:1ea51b2048a8 | 33 | #include "ble/BLE.h" |
| electronichamsters | 13:e136665cf993 | 34 | #include "mbedtls/aes.h" //derived from the standard mbedtls. Modified for smaller build. See project. |
| electronichamsters | 13:e136665cf993 | 35 | |
| electronichamsters | 13:e136665cf993 | 36 | |
| electronichamsters | 13:e136665cf993 | 37 | #define MyDebugEnb 0 //change to 1 for debug out of the same serial as intended output |
| electronichamsters | 8:46c5e0bfab05 | 38 | |
| electronichamsters | 8:46c5e0bfab05 | 39 | |
| electronichamsters | 9:1ea51b2048a8 | 40 | Ticker ticker; |
| electronichamsters | 8:46c5e0bfab05 | 41 | |
| electronichamsters | 13:e136665cf993 | 42 | //clock periodicity used for spoof checking, should be 1800 seconds for 30minutes |
| electronichamsters | 13:e136665cf993 | 43 | //make sure matches periodicity of beacons for correct operation |
| electronichamsters | 13:e136665cf993 | 44 | const uint16_t Periodicity = 1800; |
| electronichamsters | 11:d5edb6e3edab | 45 | |
| electronichamsters | 13:e136665cf993 | 46 | //aes |
| electronichamsters | 9:1ea51b2048a8 | 47 | uint8_t src_buf[16] = {0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4}; |
| electronichamsters | 9:1ea51b2048a8 | 48 | uint8_t des_buf[16] = {0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4}; |
| electronichamsters | 9:1ea51b2048a8 | 49 | mbedtls_aes_context aes; |
| electronichamsters | 13:e136665cf993 | 50 | unsigned char iv[16] = {0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x1, 0x2}; //16-byte aes key |
| electronichamsters | 13:e136665cf993 | 51 | |
| electronichamsters | 14:c62c3a92aba7 | 52 | //Serial device(p9, p11); //nRF51822 uart: TX=p9. RX=p11 |
| electronichamsters | 13:e136665cf993 | 53 | Serial device(p9, p11); //nRF51822 uart: TX=p9. RX=p11 |
| electronichamsters | 13:e136665cf993 | 54 | DigitalIn pinHandShake(p0); //handshake uart to prevent output before bridge MCU is ready. Flow control. |
| electronichamsters | 9:1ea51b2048a8 | 55 | |
| electronichamsters | 11:d5edb6e3edab | 56 | //data structures for tracking wake time of BLE end nodes, for to prevent spoofing |
| electronichamsters | 11:d5edb6e3edab | 57 | struct MAC_Birth_Record |
| electronichamsters | 11:d5edb6e3edab | 58 | { |
| electronichamsters | 11:d5edb6e3edab | 59 | uint8_t MAC_Addr[6]; //mac[0] is low order byte in mac address |
| electronichamsters | 11:d5edb6e3edab | 60 | uint16_t MAC_Time; //The time of birth for this end node |
| electronichamsters | 11:d5edb6e3edab | 61 | uint16_t Attempt_MAC_Time; |
| electronichamsters | 11:d5edb6e3edab | 62 | uint8_t Attempt_Cnt; |
| electronichamsters | 11:d5edb6e3edab | 63 | uint8_t Xmit_Cnt; |
| electronichamsters | 11:d5edb6e3edab | 64 | }; |
| electronichamsters | 13:e136665cf993 | 65 | const uint8_t sizeOfSpoof = 50; //translates to the number of unique BLE modules this gateway should receive |
| electronichamsters | 11:d5edb6e3edab | 66 | MAC_Birth_Record Spoof_Check[sizeOfSpoof]; //array tracking end node birth times |
| electronichamsters | 11:d5edb6e3edab | 67 | uint8_t Spoof_Ray_Tail = 0; //array index for next record |
| electronichamsters | 11:d5edb6e3edab | 68 | uint8_t Received_MAC_Addr[6]; //mac[0] is low order byte in mac address |
| electronichamsters | 13:e136665cf993 | 69 | uint16_t Received_MAC_Time; //global var to hold MAC for processing the current ADV |
| electronichamsters | 13:e136665cf993 | 70 | static Timer Gateway_Time; //global for the # seconds within each "Periodicity" cycle, each 30 minute chunk. |
| electronichamsters | 13:e136665cf993 | 71 | static uint16_t Expected_MAC_Time; //holds Gateway Time Zone value for Beacon's birth time indicated by ADV |
| electronichamsters | 13:e136665cf993 | 72 | uint8_t Received_Xmit_Cnt; //global var to hold xmit count for processing the current ADV |
| electronichamsters | 13:e136665cf993 | 73 | const uint8_t Allowance = 5; //number of seconds allowed for MAC Birthtime mismatch |
| electronichamsters | 11:d5edb6e3edab | 74 | |
| electronichamsters | 13:e136665cf993 | 75 | // possible return values for Is_Not_Spoofed() |
| electronichamsters | 13:e136665cf993 | 76 | const uint8_t ADVisUnknown = 0; //Unaccounted for advertisement type, should never happen |
| electronichamsters | 13:e136665cf993 | 77 | const uint8_t ADVisNew = 1; //first time seeing this MAC address |
| electronichamsters | 13:e136665cf993 | 78 | const uint8_t ADVisDuplicate = 2; //packet is one of the duplicate advertisement |
| electronichamsters | 13:e136665cf993 | 79 | const uint8_t ADVisSpoof = 3; //birth times do not match |
| electronichamsters | 11:d5edb6e3edab | 80 | |
| electronichamsters | 13:e136665cf993 | 81 | uint8_t MAC_gateway[6] = {0x0,0x0,0x0,0x0,0x0,0x0}; //mac address of this gateway BLE module |
| electronichamsters | 11:d5edb6e3edab | 82 | |
| electronichamsters | 11:d5edb6e3edab | 83 | //******************** |
| electronichamsters | 13:e136665cf993 | 84 | // Checks if Beacon's transmitted MAC birth time matches and gateway's recorded MAC birth time. |
| electronichamsters | 13:e136665cf993 | 85 | // Takes into account 30-minute clock, takes care of edge cases for wrap around |
| electronichamsters | 11:d5edb6e3edab | 86 | // returns: |
| electronichamsters | 11:d5edb6e3edab | 87 | // TRUE: if sensor's reported time lines up to gateway's recorded time |
| electronichamsters | 13:e136665cf993 | 88 | //******************** |
| electronichamsters | 11:d5edb6e3edab | 89 | bool Is_Birth_Time_Correct (uint16_t gateway_mac_time, uint16_t sensor_mac_time, uint8_t margin) |
| electronichamsters | 11:d5edb6e3edab | 90 | { |
| electronichamsters | 11:d5edb6e3edab | 91 | bool return_val = 0; |
| electronichamsters | 11:d5edb6e3edab | 92 | uint16_t current_time = (uint16_t)(Gateway_Time.read_ms()/1000); |
| electronichamsters | 11:d5edb6e3edab | 93 | int16_t gateway_time_zone = current_time - sensor_mac_time; |
| electronichamsters | 11:d5edb6e3edab | 94 | |
| electronichamsters | 13:e136665cf993 | 95 | if (current_time >= sensor_mac_time) //simple time translation |
| electronichamsters | 11:d5edb6e3edab | 96 | { |
| electronichamsters | 11:d5edb6e3edab | 97 | Expected_MAC_Time = current_time - sensor_mac_time; |
| electronichamsters | 11:d5edb6e3edab | 98 | } |
| electronichamsters | 13:e136665cf993 | 99 | else //wrap around time given periodicity |
| electronichamsters | 11:d5edb6e3edab | 100 | { |
| electronichamsters | 11:d5edb6e3edab | 101 | Expected_MAC_Time = (Periodicity - sensor_mac_time + current_time); |
| electronichamsters | 11:d5edb6e3edab | 102 | } |
| electronichamsters | 11:d5edb6e3edab | 103 | |
| electronichamsters | 13:e136665cf993 | 104 | //todo: perhaps return true if count is 0 to avoid 3-transmits needed to confirm devices that were reset? Meh. |
| electronichamsters | 13:e136665cf993 | 105 | if (1) |
| electronichamsters | 11:d5edb6e3edab | 106 | { |
| electronichamsters | 13:e136665cf993 | 107 | //We can't be too stringent that beacon MAC time precisely matches recorded time, because we're advertising |
| electronichamsters | 13:e136665cf993 | 108 | // the same data over several seconds. Not bothering to update the MAC time of each ADV within same event. |
| electronichamsters | 13:e136665cf993 | 109 | // Pick margin time (in seconds) based on how many seconds the beacon is advertising, to give this alloweance |
| electronichamsters | 13:e136665cf993 | 110 | // For example, you want to be more certain that beacon seen by gateway, and you increase the number of seconds |
| electronichamsters | 13:e136665cf993 | 111 | // you advertise for from 2 to 4 seconds. Then Margin has to be likewise increased to 4 seconds. |
| electronichamsters | 13:e136665cf993 | 112 | // Increasing probably that Beacon is seen results in slightly compromised spoof-detection. |
| electronichamsters | 11:d5edb6e3edab | 113 | if ( (gateway_mac_time < (Expected_MAC_Time + margin)) && (gateway_mac_time > (Expected_MAC_Time - margin)) ) |
| electronichamsters | 11:d5edb6e3edab | 114 | { |
| electronichamsters | 11:d5edb6e3edab | 115 | return_val = 1; |
| electronichamsters | 11:d5edb6e3edab | 116 | } |
| electronichamsters | 11:d5edb6e3edab | 117 | else |
| electronichamsters | 11:d5edb6e3edab | 118 | { |
| electronichamsters | 11:d5edb6e3edab | 119 | return_val = 0; |
| electronichamsters | 11:d5edb6e3edab | 120 | |
| electronichamsters | 11:d5edb6e3edab | 121 | } |
| electronichamsters | 11:d5edb6e3edab | 122 | } |
| electronichamsters | 13:e136665cf993 | 123 | |
| electronichamsters | 11:d5edb6e3edab | 124 | return return_val; |
| electronichamsters | 11:d5edb6e3edab | 125 | }//end Is_Birth_Time_Correct |
| electronichamsters | 11:d5edb6e3edab | 126 | |
| electronichamsters | 11:d5edb6e3edab | 127 | |
| electronichamsters | 11:d5edb6e3edab | 128 | |
| electronichamsters | 13:e136665cf993 | 129 | /* **************************************** |
| electronichamsters | 13:e136665cf993 | 130 | iterates Beacon adv against all mac birth records to detect spoofing, repeats, and |
| electronichamsters | 11:d5edb6e3edab | 131 | add device to birth records if new |
| electronichamsters | 13:e136665cf993 | 132 | |
| electronichamsters | 11:d5edb6e3edab | 133 | returns |
| electronichamsters | 13:e136665cf993 | 134 | ADVisNew = 1 First time seeing this MAC address |
| electronichamsters | 13:e136665cf993 | 135 | ADVisDuplicate = 2 Subsequent advertisements for same event |
| electronichamsters | 13:e136665cf993 | 136 | ADVisSpoof = 3 MAC times do not match |
| electronichamsters | 13:e136665cf993 | 137 | ADVisUnknown = 0 Shouldn't encounter this, debug |
| electronichamsters | 13:e136665cf993 | 138 | *******************************************/ |
| electronichamsters | 11:d5edb6e3edab | 139 | uint8_t Is_Not_Spoofed () |
| electronichamsters | 8:46c5e0bfab05 | 140 | { |
| electronichamsters | 11:d5edb6e3edab | 141 | uint8_t return_val = ADVisUnknown; |
| electronichamsters | 13:e136665cf993 | 142 | |
| electronichamsters | 11:d5edb6e3edab | 143 | //iterate through all of birth records looking for one that matches MAC address |
| electronichamsters | 11:d5edb6e3edab | 144 | for (int i=0; i<sizeOfSpoof; i++) |
| electronichamsters | 11:d5edb6e3edab | 145 | { |
| electronichamsters | 11:d5edb6e3edab | 146 | //Search for matching MAC address |
| electronichamsters | 11:d5edb6e3edab | 147 | if (Spoof_Check[i].MAC_Addr[0] == Received_MAC_Addr[0] && |
| electronichamsters | 11:d5edb6e3edab | 148 | Spoof_Check[i].MAC_Addr[1] == Received_MAC_Addr[1] && |
| electronichamsters | 11:d5edb6e3edab | 149 | Spoof_Check[i].MAC_Addr[2] == Received_MAC_Addr[2] && |
| electronichamsters | 11:d5edb6e3edab | 150 | Spoof_Check[i].MAC_Addr[3] == Received_MAC_Addr[3] && |
| electronichamsters | 11:d5edb6e3edab | 151 | Spoof_Check[i].MAC_Addr[4] == Received_MAC_Addr[4] && |
| electronichamsters | 11:d5edb6e3edab | 152 | Spoof_Check[i].MAC_Addr[5] == Received_MAC_Addr[5]) |
| electronichamsters | 11:d5edb6e3edab | 153 | { |
| electronichamsters | 11:d5edb6e3edab | 154 | #if MyDebugEnb |
| electronichamsters | 11:d5edb6e3edab | 155 | device.printf("found MAC address in array\r\n"); |
| electronichamsters | 11:d5edb6e3edab | 156 | device.printf(" Index = %d \r\n", i); |
| electronichamsters | 11:d5edb6e3edab | 157 | device.printf(" MAC = %02x:%02x:%02x:%02x:%02x:%02x \r\n", Received_MAC_Addr[5],Received_MAC_Addr[4],Received_MAC_Addr[3],Received_MAC_Addr[2],Received_MAC_Addr[1],Received_MAC_Addr[0]); |
| electronichamsters | 11:d5edb6e3edab | 158 | device.printf(" Received MAC Time = %d \r\n", Received_MAC_Time); |
| electronichamsters | 11:d5edb6e3edab | 159 | device.printf(" Gateway time = %d \r\n", (uint16_t)(Gateway_Time.read_ms()/1000)); |
| electronichamsters | 11:d5edb6e3edab | 160 | device.printf(" Array.MAC_Time = %d \r\n", Spoof_Check[i].MAC_Time); |
| electronichamsters | 11:d5edb6e3edab | 161 | device.printf(" Array.Attempt_MAC_Time = %d \r\n", Spoof_Check[i].Attempt_MAC_Time); |
| electronichamsters | 11:d5edb6e3edab | 162 | device.printf(" Array.Attempt_Cnt = %d \r\n", Spoof_Check[i].Attempt_Cnt); |
| electronichamsters | 11:d5edb6e3edab | 163 | device.printf(" Array.Xmit_Cnt = %d \r\n", Spoof_Check[i].Xmit_Cnt); |
| electronichamsters | 11:d5edb6e3edab | 164 | device.printf(" expected time = %d \r\n", ((uint16_t)(Gateway_Time.read_ms()/1000)) - Received_MAC_Time); |
| electronichamsters | 11:d5edb6e3edab | 165 | #endif |
| electronichamsters | 11:d5edb6e3edab | 166 | |
| electronichamsters | 11:d5edb6e3edab | 167 | if |
| electronichamsters | 11:d5edb6e3edab | 168 | ( |
| electronichamsters | 13:e136665cf993 | 169 | //check primary MAC time |
| electronichamsters | 13:e136665cf993 | 170 | //adjust margin=5 as needed to accomodate Beacon advertisement interval time |
| electronichamsters | 13:e136665cf993 | 171 | // if advertising for 3 seconds, then make margin 4. 4->5, etc... |
| electronichamsters | 13:e136665cf993 | 172 | Is_Birth_Time_Correct(Spoof_Check[i].MAC_Time, Received_MAC_Time, Allowance) |
| electronichamsters | 11:d5edb6e3edab | 173 | ) |
| electronichamsters | 11:d5edb6e3edab | 174 | { |
| electronichamsters | 13:e136665cf993 | 175 | if (Spoof_Check[i].Xmit_Cnt != Received_Xmit_Cnt) //check if this is duplicate |
| electronichamsters | 11:d5edb6e3edab | 176 | { |
| electronichamsters | 11:d5edb6e3edab | 177 | return_val = ADVisNew; //MAC Time checks out and not duplicate |
| electronichamsters | 11:d5edb6e3edab | 178 | Spoof_Check[i].MAC_Time = Expected_MAC_Time; //update birth time for this device. |
| electronichamsters | 11:d5edb6e3edab | 179 | Spoof_Check[i].Xmit_Cnt = Received_Xmit_Cnt; |
| electronichamsters | 11:d5edb6e3edab | 180 | //i = sizeOfSpoof; //exit for loop, we've found the MAC address. But can't do it this way. |
| electronichamsters | 11:d5edb6e3edab | 181 | //ToDo: hey, what happens if the array holds entries w/ same MAC? Is that possible? |
| electronichamsters | 11:d5edb6e3edab | 182 | #if MyDebugEnb |
| electronichamsters | 11:d5edb6e3edab | 183 | device.printf("Pirmary MAC Time as expected...expected=%d...Spoof_mac_tmr=%d \r\n", Expected_MAC_Time, Spoof_Check[i].MAC_Time); |
| electronichamsters | 11:d5edb6e3edab | 184 | #endif |
| electronichamsters | 11:d5edb6e3edab | 185 | } |
| electronichamsters | 11:d5edb6e3edab | 186 | else |
| electronichamsters | 11:d5edb6e3edab | 187 | { |
| electronichamsters | 11:d5edb6e3edab | 188 | return_val = ADVisDuplicate; //MAC Time checks out and is duplicate |
| electronichamsters | 11:d5edb6e3edab | 189 | } |
| electronichamsters | 11:d5edb6e3edab | 190 | }//if primary MAC_time match |
| electronichamsters | 11:d5edb6e3edab | 191 | else |
| electronichamsters | 11:d5edb6e3edab | 192 | { |
| electronichamsters | 13:e136665cf993 | 193 | |
| electronichamsters | 11:d5edb6e3edab | 194 | // check secondary Mac_Time |
| electronichamsters | 13:e136665cf993 | 195 | // allows for device to become registered if secondary matches multiple times |
| electronichamsters | 11:d5edb6e3edab | 196 | #if MyDebugEnb |
| electronichamsters | 11:d5edb6e3edab | 197 | device.printf(" MAC Time No Match!!...expected=%d...Spoof_mac_tmr=%d \r\n", Expected_MAC_Time, Spoof_Check[i].MAC_Time); |
| electronichamsters | 11:d5edb6e3edab | 198 | #endif |
| electronichamsters | 11:d5edb6e3edab | 199 | |
| electronichamsters | 11:d5edb6e3edab | 200 | //increment count if matches secondary |
| electronichamsters | 13:e136665cf993 | 201 | if (Is_Birth_Time_Correct(Spoof_Check[i].Attempt_MAC_Time, Received_MAC_Time, Allowance)) |
| electronichamsters | 11:d5edb6e3edab | 202 | { |
| electronichamsters | 13:e136665cf993 | 203 | if (Spoof_Check[i].Xmit_Cnt != Received_Xmit_Cnt) //not a duplicate ADV |
| electronichamsters | 11:d5edb6e3edab | 204 | { |
| electronichamsters | 11:d5edb6e3edab | 205 | Spoof_Check[i].Attempt_Cnt++; |
| electronichamsters | 11:d5edb6e3edab | 206 | Spoof_Check[i].Xmit_Cnt = Received_Xmit_Cnt; |
| electronichamsters | 11:d5edb6e3edab | 207 | #if MyDebugEnb |
| electronichamsters | 11:d5edb6e3edab | 208 | device.printf(" Match on secondary, Attempt_Cnt= %d, Attempt_MAC_Time = %d, Expected_MAC_Time=%d \r\n", Spoof_Check[i].Attempt_Cnt, Spoof_Check[i].Attempt_MAC_Time, Expected_MAC_Time); |
| electronichamsters | 11:d5edb6e3edab | 209 | #endif |
| electronichamsters | 11:d5edb6e3edab | 210 | //this takes care of usecase where a module is reset after it's already been seen by gateway |
| electronichamsters | 11:d5edb6e3edab | 211 | //after 3 consecutive correlated MAC_Time attempts we assume is our long lost friend and not a spoof. |
| electronichamsters | 11:d5edb6e3edab | 212 | if (Spoof_Check[i].Attempt_Cnt >= 3) |
| electronichamsters | 11:d5edb6e3edab | 213 | { |
| electronichamsters | 11:d5edb6e3edab | 214 | return_val = ADVisNew; |
| electronichamsters | 11:d5edb6e3edab | 215 | |
| electronichamsters | 11:d5edb6e3edab | 216 | //promote this MAC_Time to primary and start accepting data @ this MAC_Time |
| electronichamsters | 11:d5edb6e3edab | 217 | Spoof_Check[i].MAC_Time = Expected_MAC_Time; |
| electronichamsters | 11:d5edb6e3edab | 218 | Spoof_Check[i].Xmit_Cnt = Received_Xmit_Cnt; |
| electronichamsters | 11:d5edb6e3edab | 219 | Spoof_Check[i].Attempt_Cnt = 0; |
| electronichamsters | 11:d5edb6e3edab | 220 | } |
| electronichamsters | 11:d5edb6e3edab | 221 | else //Received_MAC_Time matches Attempt, but not enough times to be considered as valid. |
| electronichamsters | 11:d5edb6e3edab | 222 | { |
| electronichamsters | 11:d5edb6e3edab | 223 | return_val = ADVisSpoof; |
| electronichamsters | 11:d5edb6e3edab | 224 | } |
| electronichamsters | 11:d5edb6e3edab | 225 | }//is not duplicate, and transmit count matches |
| electronichamsters | 11:d5edb6e3edab | 226 | else |
| electronichamsters | 11:d5edb6e3edab | 227 | { |
| electronichamsters | 11:d5edb6e3edab | 228 | #if MyDebugEnb |
| electronichamsters | 11:d5edb6e3edab | 229 | device.printf(" is Duplicate , but matches Attempt_MAC_Time matches\r\n"); |
| electronichamsters | 11:d5edb6e3edab | 230 | #endif |
| electronichamsters | 11:d5edb6e3edab | 231 | return_val = ADVisDuplicate; |
| electronichamsters | 11:d5edb6e3edab | 232 | } |
| electronichamsters | 11:d5edb6e3edab | 233 | } //Recevied MAC_Time matches secondary MAC_Time |
| electronichamsters | 11:d5edb6e3edab | 234 | else |
| electronichamsters | 11:d5edb6e3edab | 235 | { |
| electronichamsters | 11:d5edb6e3edab | 236 | #if MyDebugEnb |
| electronichamsters | 11:d5edb6e3edab | 237 | device.printf(" No Match on secondary either, ===setting return_val = Spoof ===\r\n"); |
| electronichamsters | 11:d5edb6e3edab | 238 | #endif |
| electronichamsters | 11:d5edb6e3edab | 239 | return_val = ADVisSpoof; //it should still be zero, so this is just for clarification |
| electronichamsters | 11:d5edb6e3edab | 240 | //at this point: MAC matches, MAC_Time doesn't match primary nor secondary. |
| electronichamsters | 11:d5edb6e3edab | 241 | Spoof_Check[i].Attempt_Cnt = 0; //reset secondary count |
| electronichamsters | 11:d5edb6e3edab | 242 | } |
| electronichamsters | 11:d5edb6e3edab | 243 | //update second backup regardless whether it matches exptected_mac_time matches secondary or not. |
| electronichamsters | 11:d5edb6e3edab | 244 | Spoof_Check[i].Attempt_MAC_Time = Expected_MAC_Time; |
| electronichamsters | 11:d5edb6e3edab | 245 | Spoof_Check[i].Xmit_Cnt = Received_Xmit_Cnt; |
| electronichamsters | 11:d5edb6e3edab | 246 | }//if Primary MAC_Time doesn't match |
| electronichamsters | 11:d5edb6e3edab | 247 | |
| electronichamsters | 11:d5edb6e3edab | 248 | break; //return_val tells us if this is a valid or not. Don't need to search through remainder of array |
| electronichamsters | 11:d5edb6e3edab | 249 | }//if matching MAC address |
| electronichamsters | 11:d5edb6e3edab | 250 | else //MAC doesn't match |
| electronichamsters | 11:d5edb6e3edab | 251 | { |
| electronichamsters | 11:d5edb6e3edab | 252 | //MAC doesn't match and we've searched through entire record |
| electronichamsters | 13:e136665cf993 | 253 | //let's add this MAC as new, and initialze records to match this sensor |
| electronichamsters | 11:d5edb6e3edab | 254 | if (i >= (sizeOfSpoof - 1)) //we've searched through entire array and didn't find this MAC |
| electronichamsters | 11:d5edb6e3edab | 255 | { |
| electronichamsters | 11:d5edb6e3edab | 256 | //we've searched through the entire array and didn't find this MAC address |
| electronichamsters | 11:d5edb6e3edab | 257 | //add this MAC to array, and report this as valid MAC_Time |
| electronichamsters | 11:d5edb6e3edab | 258 | #if MyDebugEnb |
| electronichamsters | 11:d5edb6e3edab | 259 | device.printf("MAC not found, creating new at %d \r\n", Spoof_Ray_Tail); |
| electronichamsters | 11:d5edb6e3edab | 260 | device.printf(" sizeOfSpoof=%d ... and i=%d \r\n", sizeOfSpoof, i); |
| electronichamsters | 11:d5edb6e3edab | 261 | #endif |
| electronichamsters | 11:d5edb6e3edab | 262 | |
| electronichamsters | 11:d5edb6e3edab | 263 | return_val = ADVisNew; |
| electronichamsters | 11:d5edb6e3edab | 264 | |
| electronichamsters | 13:e136665cf993 | 265 | //create new entry for newly seen MAC @ tail of FIFO |
| electronichamsters | 11:d5edb6e3edab | 266 | Spoof_Check[Spoof_Ray_Tail].MAC_Addr[0] = Received_MAC_Addr[0]; |
| electronichamsters | 11:d5edb6e3edab | 267 | Spoof_Check[Spoof_Ray_Tail].MAC_Addr[1] = Received_MAC_Addr[1]; |
| electronichamsters | 11:d5edb6e3edab | 268 | Spoof_Check[Spoof_Ray_Tail].MAC_Addr[2] = Received_MAC_Addr[2]; |
| electronichamsters | 11:d5edb6e3edab | 269 | Spoof_Check[Spoof_Ray_Tail].MAC_Addr[3] = Received_MAC_Addr[3]; |
| electronichamsters | 11:d5edb6e3edab | 270 | Spoof_Check[Spoof_Ray_Tail].MAC_Addr[4] = Received_MAC_Addr[4]; |
| electronichamsters | 11:d5edb6e3edab | 271 | Spoof_Check[Spoof_Ray_Tail].MAC_Addr[5] = Received_MAC_Addr[5]; |
| electronichamsters | 11:d5edb6e3edab | 272 | Spoof_Check[Spoof_Ray_Tail].Xmit_Cnt = Received_Xmit_Cnt; |
| electronichamsters | 11:d5edb6e3edab | 273 | |
| electronichamsters | 13:e136665cf993 | 274 | //call this just to calculate Expected_MAC_Time...kinda ugly to do this. todo: don't do this |
| electronichamsters | 13:e136665cf993 | 275 | Is_Birth_Time_Correct (0, Received_MAC_Time, Allowance); |
| electronichamsters | 11:d5edb6e3edab | 276 | #if MyDebugEnb |
| electronichamsters | 11:d5edb6e3edab | 277 | device.printf("Expected_MAC_Time should be %d \r\n", Expected_MAC_Time); |
| electronichamsters | 11:d5edb6e3edab | 278 | #endif |
| electronichamsters | 11:d5edb6e3edab | 279 | Spoof_Check[Spoof_Ray_Tail].MAC_Time = Expected_MAC_Time; //wrong!!! |
| electronichamsters | 11:d5edb6e3edab | 280 | Spoof_Check[Spoof_Ray_Tail].Xmit_Cnt = Received_Xmit_Cnt; |
| electronichamsters | 11:d5edb6e3edab | 281 | Spoof_Check[Spoof_Ray_Tail].Attempt_Cnt = 0; |
| electronichamsters | 11:d5edb6e3edab | 282 | |
| electronichamsters | 11:d5edb6e3edab | 283 | //increment tail pointer to next position or wrap around |
| electronichamsters | 11:d5edb6e3edab | 284 | if (Spoof_Ray_Tail >= (sizeOfSpoof-1) ) //FIFO at end of array, return to beginning |
| electronichamsters | 11:d5edb6e3edab | 285 | { |
| electronichamsters | 11:d5edb6e3edab | 286 | Spoof_Ray_Tail = 0; |
| electronichamsters | 11:d5edb6e3edab | 287 | } |
| electronichamsters | 11:d5edb6e3edab | 288 | else |
| electronichamsters | 11:d5edb6e3edab | 289 | { |
| electronichamsters | 11:d5edb6e3edab | 290 | Spoof_Ray_Tail++; |
| electronichamsters | 11:d5edb6e3edab | 291 | } |
| electronichamsters | 11:d5edb6e3edab | 292 | |
| electronichamsters | 11:d5edb6e3edab | 293 | }//end if loop at end of array |
| electronichamsters | 11:d5edb6e3edab | 294 | }//end else not maching MAC |
| electronichamsters | 11:d5edb6e3edab | 295 | }//loop through Spoof_Check array |
| electronichamsters | 11:d5edb6e3edab | 296 | |
| electronichamsters | 13:e136665cf993 | 297 | |
| electronichamsters | 11:d5edb6e3edab | 298 | return return_val; |
| electronichamsters | 11:d5edb6e3edab | 299 | }//end Is_Not_Spoofed() |
| electronichamsters | 11:d5edb6e3edab | 300 | |
| electronichamsters | 11:d5edb6e3edab | 301 | |
| electronichamsters | 13:e136665cf993 | 302 | void periodicCallback(void) //every Periodicity seconds, reset clock |
| electronichamsters | 11:d5edb6e3edab | 303 | { |
| electronichamsters | 11:d5edb6e3edab | 304 | #if MyDebugEnb |
| electronichamsters | 11:d5edb6e3edab | 305 | device.printf("===== reset timer ===== \r\n"); |
| electronichamsters | 11:d5edb6e3edab | 306 | #endif |
| electronichamsters | 11:d5edb6e3edab | 307 | Gateway_Time.reset(); |
| electronichamsters | 11:d5edb6e3edab | 308 | } |
| electronichamsters | 11:d5edb6e3edab | 309 | |
| electronichamsters | 11:d5edb6e3edab | 310 | |
| electronichamsters | 13:e136665cf993 | 311 | |
| electronichamsters | 13:e136665cf993 | 312 | //Scheme for recognizing our beacons and ignoring all other beacons |
| electronichamsters | 13:e136665cf993 | 313 | //idea: could use something like Pearson hash on parts of MAC address to make less obvious |
| electronichamsters | 11:d5edb6e3edab | 314 | bool is_ours(const uint8_t * adv_data, const uint8_t * adv_address) |
| electronichamsters | 11:d5edb6e3edab | 315 | { |
| electronichamsters | 11:d5edb6e3edab | 316 | if ((adv_data[5] == adv_address[3]) && (adv_data[6] == adv_address[2])) |
| electronichamsters | 11:d5edb6e3edab | 317 | return 1; |
| electronichamsters | 11:d5edb6e3edab | 318 | else |
| electronichamsters | 11:d5edb6e3edab | 319 | return 0; |
| electronichamsters | 8:46c5e0bfab05 | 320 | } |
| electronichamsters | 8:46c5e0bfab05 | 321 | |
| electronichamsters | 13:e136665cf993 | 322 | |
| electronichamsters | 13:e136665cf993 | 323 | // callback when BLE stack scans and finds a BLE ADV packet |
| electronichamsters | 13:e136665cf993 | 324 | // Parse ADV and determine if it's one of ours, output data to serial if it is. |
| electronichamsters | 9:1ea51b2048a8 | 325 | void advertisementCallback(const Gap::AdvertisementCallbackParams_t *params) { |
| electronichamsters | 8:46c5e0bfab05 | 326 | |
| electronichamsters | 9:1ea51b2048a8 | 327 | if ( (params->advertisingDataLen) >= 8) |
| electronichamsters | 9:1ea51b2048a8 | 328 | { |
| electronichamsters | 11:d5edb6e3edab | 329 | if (is_ours(params->advertisingData, params->peerAddr)) |
| electronichamsters | 9:1ea51b2048a8 | 330 | { |
| electronichamsters | 11:d5edb6e3edab | 331 | #if MyDebugEnb |
| electronichamsters | 11:d5edb6e3edab | 332 | device.printf("----------- ADV CAll Back -----------------\r\n "); |
| electronichamsters | 11:d5edb6e3edab | 333 | #endif |
| electronichamsters | 13:e136665cf993 | 334 | |
| electronichamsters | 11:d5edb6e3edab | 335 | //************** |
| electronichamsters | 11:d5edb6e3edab | 336 | // Decrypt data |
| electronichamsters | 11:d5edb6e3edab | 337 | //************** |
| electronichamsters | 11:d5edb6e3edab | 338 | //prep array for deciphering the encrypted portion of advertisement |
| electronichamsters | 11:d5edb6e3edab | 339 | for (int i = 0; i<16; i++) |
| electronichamsters | 11:d5edb6e3edab | 340 | { |
| electronichamsters | 11:d5edb6e3edab | 341 | src_buf[i]=params->advertisingData[i+15]; |
| electronichamsters | 11:d5edb6e3edab | 342 | #if MyDebugEnb |
| electronichamsters | 11:d5edb6e3edab | 343 | //device.printf("%x ", src_buf[i]); |
| electronichamsters | 11:d5edb6e3edab | 344 | #endif |
| electronichamsters | 11:d5edb6e3edab | 345 | } |
| electronichamsters | 13:e136665cf993 | 346 | mbedtls_aes_crypt_ecb( &aes, MBEDTLS_AES_DECRYPT, src_buf, des_buf ); //execution time not an issue |
| electronichamsters | 11:d5edb6e3edab | 347 | #if MyDebugEnb |
| electronichamsters | 11:d5edb6e3edab | 348 | //device.printf("decoded first 16 bytes \r\n"); |
| electronichamsters | 11:d5edb6e3edab | 349 | for (int i = 0; i<16; i++) |
| electronichamsters | 11:d5edb6e3edab | 350 | { |
| electronichamsters | 11:d5edb6e3edab | 351 | //device.printf("%02x", params->advertisingData[index]); |
| electronichamsters | 11:d5edb6e3edab | 352 | if (i < 2) |
| electronichamsters | 11:d5edb6e3edab | 353 | { |
| electronichamsters | 11:d5edb6e3edab | 354 | //device.printf("%x ", des_buf[i]); |
| electronichamsters | 11:d5edb6e3edab | 355 | } |
| electronichamsters | 11:d5edb6e3edab | 356 | else |
| electronichamsters | 11:d5edb6e3edab | 357 | { |
| electronichamsters | 11:d5edb6e3edab | 358 | //device.printf("%c ", des_buf[i]); |
| electronichamsters | 11:d5edb6e3edab | 359 | } |
| electronichamsters | 11:d5edb6e3edab | 360 | } |
| electronichamsters | 11:d5edb6e3edab | 361 | //device.printf("done----- \r\n"); |
| electronichamsters | 11:d5edb6e3edab | 362 | #endif |
| electronichamsters | 13:e136665cf993 | 363 | |
| electronichamsters | 13:e136665cf993 | 364 | //save MAC address to global |
| electronichamsters | 11:d5edb6e3edab | 365 | Received_MAC_Addr[0] = params->peerAddr[0]; |
| electronichamsters | 11:d5edb6e3edab | 366 | Received_MAC_Addr[1] = params->peerAddr[1]; |
| electronichamsters | 11:d5edb6e3edab | 367 | Received_MAC_Addr[2] = params->peerAddr[2]; |
| electronichamsters | 11:d5edb6e3edab | 368 | Received_MAC_Addr[3] = params->peerAddr[3]; |
| electronichamsters | 11:d5edb6e3edab | 369 | Received_MAC_Addr[4] = params->peerAddr[4]; |
| electronichamsters | 11:d5edb6e3edab | 370 | Received_MAC_Addr[5] = params->peerAddr[5]; |
| electronichamsters | 11:d5edb6e3edab | 371 | |
| electronichamsters | 13:e136665cf993 | 372 | Received_MAC_Time = des_buf[0] | (des_buf[1] << 8); //it's a 2 byte uint little endian |
| electronichamsters | 11:d5edb6e3edab | 373 | Received_Xmit_Cnt = des_buf[2]; |
| electronichamsters | 11:d5edb6e3edab | 374 | |
| electronichamsters | 11:d5edb6e3edab | 375 | |
| electronichamsters | 11:d5edb6e3edab | 376 | |
| electronichamsters | 9:1ea51b2048a8 | 377 | |
| electronichamsters | 13:e136665cf993 | 378 | // punch out the data over serial as json |
| electronichamsters | 11:d5edb6e3edab | 379 | //--------------------------------------- |
| electronichamsters | 11:d5edb6e3edab | 380 | // 1. MAC and RSSI |
| electronichamsters | 11:d5edb6e3edab | 381 | // "mac":xxxxxxxx,rssi:xx, |
| electronichamsters | 11:d5edb6e3edab | 382 | //--------------------------------------- |
| electronichamsters | 11:d5edb6e3edab | 383 | uint8_t ADV_Result = Is_Not_Spoofed(); |
| electronichamsters | 11:d5edb6e3edab | 384 | #if MyDebugEnb |
| electronichamsters | 11:d5edb6e3edab | 385 | device.printf("--------ADV_Result = %d", ADV_Result); |
| electronichamsters | 11:d5edb6e3edab | 386 | #endif |
| electronichamsters | 11:d5edb6e3edab | 387 | |
| electronichamsters | 13:e136665cf993 | 388 | //decide wether or not duplicate ADV packets should be output as well. |
| electronichamsters | 13:e136665cf993 | 389 | //if ((ADV_Result == ADVisNew) || (ADV_Result==ADVisDuplicate)) //output both first and duplicates |
| electronichamsters | 13:e136665cf993 | 390 | if (ADV_Result == ADVisNew) //only output first received ADV |
| electronichamsters | 9:1ea51b2048a8 | 391 | { |
| electronichamsters | 11:d5edb6e3edab | 392 | device.printf("{\"mac\":\"%02x%02x%02x%02x%02x%02x\",\"rssi\":%d,", |
| electronichamsters | 11:d5edb6e3edab | 393 | params->peerAddr[5], |
| electronichamsters | 11:d5edb6e3edab | 394 | params->peerAddr[4], |
| electronichamsters | 11:d5edb6e3edab | 395 | params->peerAddr[3], |
| electronichamsters | 11:d5edb6e3edab | 396 | params->peerAddr[2], |
| electronichamsters | 11:d5edb6e3edab | 397 | params->peerAddr[1], |
| electronichamsters | 11:d5edb6e3edab | 398 | params->peerAddr[0], |
| electronichamsters | 11:d5edb6e3edab | 399 | params->rssi |
| electronichamsters | 11:d5edb6e3edab | 400 | ); |
| electronichamsters | 11:d5edb6e3edab | 401 | |
| electronichamsters | 11:d5edb6e3edab | 402 | //--------------------------------------- |
| electronichamsters | 13:e136665cf993 | 403 | // 2. Volt is always X.XX, per Beacon code |
| electronichamsters | 11:d5edb6e3edab | 404 | // "volt":3.03, |
| electronichamsters | 11:d5edb6e3edab | 405 | //--------------------------------------- |
| electronichamsters | 11:d5edb6e3edab | 406 | device.printf("\"volt\":%c%c%c%c,", |
| electronichamsters | 11:d5edb6e3edab | 407 | params->advertisingData[9], |
| electronichamsters | 11:d5edb6e3edab | 408 | params->advertisingData[10], |
| electronichamsters | 11:d5edb6e3edab | 409 | params->advertisingData[11], |
| electronichamsters | 11:d5edb6e3edab | 410 | params->advertisingData[12]); |
| electronichamsters | 11:d5edb6e3edab | 411 | |
| electronichamsters | 11:d5edb6e3edab | 412 | |
| electronichamsters | 11:d5edb6e3edab | 413 | //--------------------------------------- |
| electronichamsters | 13:e136665cf993 | 414 | // 3. Beacon time (# seconds since birth, clocked around Periodicity) 0-1800 seconds |
| electronichamsters | 13:e136665cf993 | 415 | // "tmr":xxxx, |
| electronichamsters | 11:d5edb6e3edab | 416 | //--------------------------------------- |
| electronichamsters | 11:d5edb6e3edab | 417 | |
| electronichamsters | 13:e136665cf993 | 418 | device.printf("\"tmr\":%d,", Received_MAC_Time); |
| electronichamsters | 13:e136665cf993 | 419 | |
| electronichamsters | 13:e136665cf993 | 420 | //--------------------------------------- |
| electronichamsters | 13:e136665cf993 | 421 | // 4. Xmit Counter 0-255, incremented by Beacon with each new unique ADV event. |
| electronichamsters | 13:e136665cf993 | 422 | // "tmr":xxxx, |
| electronichamsters | 13:e136665cf993 | 423 | //--------------------------------------- |
| electronichamsters | 14:c62c3a92aba7 | 424 | device.printf("\"xcnt\":%d,", Received_Xmit_Cnt); |
| electronichamsters | 11:d5edb6e3edab | 425 | |
| electronichamsters | 11:d5edb6e3edab | 426 | //--------------------------------------- |
| electronichamsters | 13:e136665cf993 | 427 | // 5. rest of sensor payload as json |
| electronichamsters | 11:d5edb6e3edab | 428 | // "tmr":xxx, |
| electronichamsters | 11:d5edb6e3edab | 429 | //--------------------------------------- |
| electronichamsters | 13:e136665cf993 | 430 | for (int i = 3; i<16; i++) |
| electronichamsters | 9:1ea51b2048a8 | 431 | { |
| electronichamsters | 11:d5edb6e3edab | 432 | device.printf("%c", des_buf[i]); //print as character |
| electronichamsters | 13:e136665cf993 | 433 | //Note that sensor JSON payload most likely is not exactly 16 bytes long, so there's likely /0 in middle |
| electronichamsters | 13:e136665cf993 | 434 | // of this. But JSON library on gateway handles this gracefully. |
| electronichamsters | 9:1ea51b2048a8 | 435 | } |
| electronichamsters | 11:d5edb6e3edab | 436 | |
| electronichamsters | 13:e136665cf993 | 437 | device.printf("}"); |
| electronichamsters | 13:e136665cf993 | 438 | device.printf("\r\n"); //gateway looking for cariage return to indicate end |
| electronichamsters | 14:c62c3a92aba7 | 439 | wait_ms(140); //needed to give gateway time to assert flow control handshake pin |
| electronichamsters | 13:e136665cf993 | 440 | while (pinHandShake.read() == 1) //normally pulled down, so loop when gateway processing; |
| electronichamsters | 9:1ea51b2048a8 | 441 | { |
| electronichamsters | 13:e136665cf993 | 442 | //uart flow control |
| electronichamsters | 13:e136665cf993 | 443 | //blocking until gateway has processed ADV data from uart |
| electronichamsters | 11:d5edb6e3edab | 444 | } |
| electronichamsters | 9:1ea51b2048a8 | 445 | } |
| electronichamsters | 13:e136665cf993 | 446 | |
| electronichamsters | 13:e136665cf993 | 447 | if (ADV_Result == ADVisSpoof) //If detected spoofed sensor data |
| electronichamsters | 11:d5edb6e3edab | 448 | { |
| electronichamsters | 11:d5edb6e3edab | 449 | device.printf("{\"mac\":\"%02x%02x%02x%02x%02x%02x\",\"spoof\": %d}\r\n", |
| electronichamsters | 11:d5edb6e3edab | 450 | params->peerAddr[5], |
| electronichamsters | 11:d5edb6e3edab | 451 | params->peerAddr[4], |
| electronichamsters | 11:d5edb6e3edab | 452 | params->peerAddr[3], |
| electronichamsters | 11:d5edb6e3edab | 453 | params->peerAddr[2], |
| electronichamsters | 11:d5edb6e3edab | 454 | params->peerAddr[1], |
| electronichamsters | 11:d5edb6e3edab | 455 | params->peerAddr[0], |
| electronichamsters | 11:d5edb6e3edab | 456 | ADV_Result); |
| electronichamsters | 11:d5edb6e3edab | 457 | } |
| electronichamsters | 13:e136665cf993 | 458 | |
| electronichamsters | 13:e136665cf993 | 459 | if (ADV_Result == ADVisUnknown) //catch all, should never occur |
| electronichamsters | 11:d5edb6e3edab | 460 | { |
| electronichamsters | 11:d5edb6e3edab | 461 | device.printf("{\"mac\":\"%02x%02x%02x%02x%02x%02x\",\"unknown\": %d}\r\n", |
| electronichamsters | 11:d5edb6e3edab | 462 | params->peerAddr[5], |
| electronichamsters | 11:d5edb6e3edab | 463 | params->peerAddr[4], |
| electronichamsters | 11:d5edb6e3edab | 464 | params->peerAddr[3], |
| electronichamsters | 11:d5edb6e3edab | 465 | params->peerAddr[2], |
| electronichamsters | 11:d5edb6e3edab | 466 | params->peerAddr[1], |
| electronichamsters | 11:d5edb6e3edab | 467 | params->peerAddr[0], |
| electronichamsters | 11:d5edb6e3edab | 468 | ADV_Result); |
| electronichamsters | 11:d5edb6e3edab | 469 | } |
| electronichamsters | 9:1ea51b2048a8 | 470 | }//end if it's our adv |
| electronichamsters | 9:1ea51b2048a8 | 471 | }//end if advertisingDataLen |
| electronichamsters | 11:d5edb6e3edab | 472 | }//end advertisementCallback |
| electronichamsters | 8:46c5e0bfab05 | 473 | |
| electronichamsters | 8:46c5e0bfab05 | 474 | |
| electronichamsters | 8:46c5e0bfab05 | 475 | |
| andresag | 7:0a8bbb6dea16 | 476 | /** |
| electronichamsters | 9:1ea51b2048a8 | 477 | * This function is called when the ble initialization process has failed |
| andresag | 7:0a8bbb6dea16 | 478 | */ |
| andresag | 7:0a8bbb6dea16 | 479 | void onBleInitError(BLE &ble, ble_error_t error) |
| andresag | 7:0a8bbb6dea16 | 480 | { |
| andresag | 7:0a8bbb6dea16 | 481 | /* Initialization error handling should go here */ |
| electronichamsters | 9:1ea51b2048a8 | 482 | device.printf("periodic callback "); |
| electronichamsters | 9:1ea51b2048a8 | 483 | device.printf("\r\n"); |
| andresag | 7:0a8bbb6dea16 | 484 | } |
| andresag | 7:0a8bbb6dea16 | 485 | |
| andresag | 7:0a8bbb6dea16 | 486 | /** |
| andresag | 7:0a8bbb6dea16 | 487 | * Callback triggered when the ble initialization process has finished |
| andresag | 7:0a8bbb6dea16 | 488 | */ |
| andresag | 7:0a8bbb6dea16 | 489 | void bleInitComplete(BLE::InitializationCompleteCallbackContext *params) |
| sunsmile2015 | 2:b935358da5ba | 490 | { |
| andresag | 7:0a8bbb6dea16 | 491 | BLE& ble = params->ble; |
| andresag | 7:0a8bbb6dea16 | 492 | ble_error_t error = params->error; |
| andresag | 7:0a8bbb6dea16 | 493 | |
| andresag | 7:0a8bbb6dea16 | 494 | if (error != BLE_ERROR_NONE) { |
| andresag | 7:0a8bbb6dea16 | 495 | /* In case of error, forward the error handling to onBleInitError */ |
| andresag | 7:0a8bbb6dea16 | 496 | onBleInitError(ble, error); |
| andresag | 7:0a8bbb6dea16 | 497 | return; |
| andresag | 7:0a8bbb6dea16 | 498 | } |
| andresag | 7:0a8bbb6dea16 | 499 | |
| andresag | 7:0a8bbb6dea16 | 500 | /* Ensure that it is the default instance of BLE */ |
| andresag | 7:0a8bbb6dea16 | 501 | if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) { |
| andresag | 7:0a8bbb6dea16 | 502 | return; |
| andresag | 7:0a8bbb6dea16 | 503 | } |
| electronichamsters | 9:1ea51b2048a8 | 504 | |
| electronichamsters | 13:e136665cf993 | 505 | //note: defaults to scanning 3 channels. |
| electronichamsters | 13:e136665cf993 | 506 | // Window and Interval in ms. Duty cycle = (interval / window); 200ms/500ms = 40%; Max is 10000 |
| electronichamsters | 13:e136665cf993 | 507 | // |---window---| |---window---| |---window---| |
| electronichamsters | 13:e136665cf993 | 508 | // |---------- interval @ ch1 -----| |------- interval @ ch2--------||-----interval @ ch3-------| |
| electronichamsters | 13:e136665cf993 | 509 | // set window equal to interval for full duty cycle scanning |
| electronichamsters | 13:e136665cf993 | 510 | // set interval to hit all 3 channels of beacon advertising over advertising time duration |
| electronichamsters | 13:e136665cf993 | 511 | ble.gap().setScanParams(500 /* scan interval */, 500 /* scan window */); |
| electronichamsters | 9:1ea51b2048a8 | 512 | ble.gap().startScan(advertisementCallback); |
| sunsmile2015 | 4:e5fa4c8838db | 513 | } |
| sunsmile2015 | 4:e5fa4c8838db | 514 | |
| sunsmile2015 | 2:b935358da5ba | 515 | int main(void) |
| sunsmile2015 | 2:b935358da5ba | 516 | { |
| electronichamsters | 13:e136665cf993 | 517 | pinHandShake.mode(PullDown); //Expecting gateway to set pin high for flow control |
| electronichamsters | 13:e136665cf993 | 518 | |
| electronichamsters | 13:e136665cf993 | 519 | //intialize spoof checking data structure |
| electronichamsters | 11:d5edb6e3edab | 520 | for (int i=0; i<sizeOfSpoof; i++) |
| electronichamsters | 11:d5edb6e3edab | 521 | { |
| electronichamsters | 11:d5edb6e3edab | 522 | Spoof_Check[i].MAC_Addr[0]= 0; |
| electronichamsters | 11:d5edb6e3edab | 523 | Spoof_Check[i].MAC_Addr[1]= 0; |
| electronichamsters | 11:d5edb6e3edab | 524 | Spoof_Check[i].MAC_Addr[2]= 0; |
| electronichamsters | 11:d5edb6e3edab | 525 | Spoof_Check[i].MAC_Time = 0; |
| electronichamsters | 11:d5edb6e3edab | 526 | Spoof_Check[i].Attempt_MAC_Time = 0; |
| electronichamsters | 11:d5edb6e3edab | 527 | Spoof_Check[i].Attempt_Cnt = 0; |
| electronichamsters | 11:d5edb6e3edab | 528 | Spoof_Check[i].Attempt_Cnt = 0; |
| electronichamsters | 11:d5edb6e3edab | 529 | Spoof_Check[i].Xmit_Cnt = 0; |
| electronichamsters | 11:d5edb6e3edab | 530 | } |
| electronichamsters | 13:e136665cf993 | 531 | |
| electronichamsters | 13:e136665cf993 | 532 | //maintains periodicity for spoof checking scheme |
| electronichamsters | 11:d5edb6e3edab | 533 | Gateway_Time.start(); |
| electronichamsters | 11:d5edb6e3edab | 534 | ticker.attach(periodicCallback, Periodicity); |
| electronichamsters | 8:46c5e0bfab05 | 535 | |
| electronichamsters | 13:e136665cf993 | 536 | device.baud(9600); //p0.9 tx, p0.11 rx. Use p0.9 to gateway |
| electronichamsters | 13:e136665cf993 | 537 | |
| electronichamsters | 13:e136665cf993 | 538 | mbedtls_aes_setkey_dec( &aes, iv, 128 ); //set AES key for decrypt |
| sunsmile2015 | 0:3dc6e424dba0 | 539 | |
| andresag | 7:0a8bbb6dea16 | 540 | BLE &ble = BLE::Instance(); |
| andresag | 7:0a8bbb6dea16 | 541 | ble.init(bleInitComplete); |
| electronichamsters | 13:e136665cf993 | 542 | |
| electronichamsters | 13:e136665cf993 | 543 | ble.getAddress(0,MAC_gateway); //get this gateway module's ble MAC |
| electronichamsters | 13:e136665cf993 | 544 | device.printf("{\"mac\":\"%02x%02x%02x%02x%02x%02x\",\"gatewaystart\":\"now\"},", |
| electronichamsters | 13:e136665cf993 | 545 | MAC_gateway[5], |
| electronichamsters | 13:e136665cf993 | 546 | MAC_gateway[4], |
| electronichamsters | 13:e136665cf993 | 547 | MAC_gateway[3], |
| electronichamsters | 13:e136665cf993 | 548 | MAC_gateway[2], |
| electronichamsters | 13:e136665cf993 | 549 | MAC_gateway[1], |
| electronichamsters | 13:e136665cf993 | 550 | MAC_gateway[0] |
| electronichamsters | 13:e136665cf993 | 551 | ); |
| electronichamsters | 13:e136665cf993 | 552 | device.printf("\r\n"); |
| electronichamsters | 13:e136665cf993 | 553 | |
| electronichamsters | 13:e136665cf993 | 554 | while (true) |
| electronichamsters | 13:e136665cf993 | 555 | { |
| electronichamsters | 13:e136665cf993 | 556 | ble.waitForEvent(); //idle here until callback |
| electronichamsters | 9:1ea51b2048a8 | 557 | } |
| electronichamsters | 9:1ea51b2048a8 | 558 | } |