rbxii3/firmware
1
0
Fork 0
mirror of https://github.com/meshtastic/firmware.git synced 2026-01-03 16:41:56 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add crc check to eeprom autoconf

Browse Source
This commit is contained in:
Jonathan Bennett
2025-08-20 12:36:28 -05:00
parent 08bc92eafe
commit 13980dc5b7
1 changed files with 84 additions and 51 deletions
Download Patch File Download Diff File Expand all files Collapse all files

135
src/platform/portduino/PortduinoGlue.cpp
View File

@@ -20,6 +20,8 @@
#include <map>
#include <sys/ioctl.h>
#include <unistd.h>
#include <ErriezCRC32.h>
#ifdef PORTDUINO_LINUX_HARDWARE
#include <cxxabi.h>
@@ -253,64 +255,95 @@ void portduinoSetup()
std::cout << "autoconf: Could not locate CH341 device" << std::endl;
}
// Try Pi HAT+
std::cout << "autoconf: Looking for Pi HAT+..." << std::endl;
if (access("/proc/device-tree/hat/product", R_OK) == 0) {
std::ifstream hatProductFile("/proc/device-tree/hat/product");
if (hatProductFile.is_open()) {
hatProductFile.read(autoconf_product, 95);
hatProductFile.close();
if (strlen(autoconf_product) < 6) {
std::cout << "autoconf: Looking for Pi HAT+..." << std::endl;
if (access("/proc/device-tree/hat/product", R_OK) == 0) {
std::ifstream hatProductFile("/proc/device-tree/hat/product");
if (hatProductFile.is_open()) {
hatProductFile.read(autoconf_product, 95);
hatProductFile.close();
}
std::cout << "autoconf: Found Pi HAT+ " << autoconf_product << " at /proc/device-tree/hat/product" << std::endl;
} else {
std::cout << "autoconf: Could not locate Pi HAT+ at /proc/device-tree/hat/product" << std::endl;
}
std::cout << "autoconf: Found Pi HAT+ " << autoconf_product << " at /proc/device-tree/hat/product" << std::endl;
} else {
std::cout << "autoconf: Could not locate Pi HAT+ at /proc/device-tree/hat/product" << std::endl;
}
// attempt to load autoconf data from an EEPROM on 0x50
// RAK6421-13300-S1:aabbcc123456:5ba85807d92138b7519cfb60460573af
// <model string>:mac address :<16 random unique bytes in hexidecimal>
try {
char *mac_start = nullptr;
char *devID_start = nullptr;
Wire.begin();
Wire.beginTransmission(0x50);
Wire.write(0x0);
Wire.write(0x0);
Wire.endTransmission();
Wire.requestFrom((uint8_t)0x50, (uint8_t)75);
uint8_t i = 0;
delay(100);
while (Wire.available() && i < sizeof(autoconf_product)) {
autoconf_product[i] = Wire.read();
if (autoconf_product[i] == 0xff) {
autoconf_product[i] = 0x0;
break;
} else if (autoconf_product[i] == ':') {
autoconf_product[i] = 0x0;
if (mac_start == nullptr) {
mac_start = autoconf_product + i + 1;
} else if (devID_start == nullptr) {
devID_start = autoconf_product + i + 1;
// RAK6421-13300-S1:aabbcc123456:5ba85807d92138b7519cfb60460573af:3061e8d8
// <model string>:mac address :<16 random unique bytes in hexidecimal> : crc32
// crc32 is calculated on the eeprom string up to but not including the final colon
if (strlen(autoconf_product) < 6) {
try {
char *mac_start = nullptr;
char *devID_start = nullptr;
char *crc32_start = nullptr;
Wire.begin();
Wire.beginTransmission(0x50);
Wire.write(0x0);
Wire.write(0x0);
Wire.endTransmission();
Wire.requestFrom((uint8_t)0x50, (uint8_t)75);
uint8_t i = 0;
delay(100);
std::string autoconf_raw;
while (Wire.available() && i < sizeof(autoconf_product)) {
autoconf_product[i] = Wire.read();
if (autoconf_product[i] == 0xff) {
autoconf_product[i] = 0x0;
break;
}
}
i++;
}
std::cout << "autoconf: Found eeprom data " << autoconf_product << std::endl;
if (mac_start != nullptr) {
std::cout << "autoconf: Found mac data " << mac_start << std::endl;
if (strlen(mac_start) == 12)
settingsStrings[mac_address] = std::string(mac_start);
}
if (devID_start != nullptr) {
std::cout << "autoconf: Found deviceid data " << devID_start << std::endl;
if (strlen(devID_start) == 32) {
std::string devID_str(devID_start);
for (int j = 0; j < 16; j++) {
portduino_config.device_id[j] = std::stoi(devID_str.substr(j * 2, 2), nullptr, 16);
autoconf_raw += autoconf_product[i];
if (autoconf_product[i] == ':') {
autoconf_product[i] = 0x0;
if (mac_start == nullptr) {
mac_start = autoconf_product + i + 1;
} else if (devID_start == nullptr) {
devID_start = autoconf_product + i + 1;
} else if (crc32_start == nullptr) {
crc32_start = autoconf_product + i + 1;
}
}
portduino_config.has_device_id = true;
i++;
}
if (crc32_start != nullptr && strlen(crc32_start) == 8) {
std::string crc32_str(crc32_start);
uint32_t crc32_value = 0;
// convert crc32 ascii to raw uint32
for (int j = 0; j < 4; j++) {
crc32_value += std::stoi(crc32_str.substr(j*2, 2), nullptr, 16) << (3 - j)*8;
}
std::cout << "autoconf: Found eeprom crc " << crc32_start << std::endl;
// set the autoconf string to blank and short circuit
if (crc32_value != crc32Buffer(autoconf_raw.c_str(), i - 9)) {
std::cout << "autoconf: crc32 mismatch, dropping " << std::endl;
autoconf_product[0] = 0x0;
} else {
std::cout << "autoconf: Found eeprom data " << autoconf_raw << std::endl;
if (mac_start != nullptr) {
std::cout << "autoconf: Found mac data " << mac_start << std::endl;
if (strlen(mac_start) == 12)
settingsStrings[mac_address] = std::string(mac_start);
}
if (devID_start != nullptr) {
std::cout << "autoconf: Found deviceid data " << devID_start << std::endl;
if (strlen(devID_start) == 32) {
std::string devID_str(devID_start);
for (int j = 0; j < 16; j++) {
portduino_config.device_id[j] = std::stoi(devID_str.substr(j*2, 2), nullptr, 16);
}
portduino_config.has_device_id = true;
}
}
}
} else {
std::cout << "autoconf: crc32 missing " << std::endl;
autoconf_product[0] = 0x0;
}
} catch (...) {
std::cout << "autoconf: Could not locate EEPROM" << std::endl;
}
} catch (...) {
std::cout << "autoconf: Could not locate EEPROM" << std::endl;
}
// Load the config file based on the product string
if (strlen(autoconf_product) > 0) {