NVRAM logic

src/UFiber.Configurator/CRC32.cs

@@ -0,0 +1,87 @@
+using System;
+
+namespace UFiber.Configurator
+{
+    internal static class CRC32
+    {
+        public static uint GenerateCrc(ReadOnlySpan<byte> data)
+        {
+            var crc = 0xFFFFFFFF;
+
+            foreach (var bit in data)
+            {
+                crc = (crc >> 8) ^ _crcTable[(crc ^ bit) & 0xFF];
+            }
+
+            return crc & 0xFFFFFFFF;
+        }
+
+        private static readonly uint[] _crcTable =
+        {
+            0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA,
+            0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
+            0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
+            0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
+            0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
+            0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
+            0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC,
+            0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
+            0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
+            0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
+            0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940,
+            0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
+            0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116,
+            0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
+            0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
+            0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
+            0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A,
+            0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
+            0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818,
+            0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
+            0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
+            0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
+            0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C,
+            0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
+            0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
+            0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
+            0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
+            0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
+            0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086,
+            0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
+            0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4,
+            0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
+            0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
+            0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
+            0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
+            0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
+            0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE,
+            0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
+            0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
+            0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
+            0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252,
+            0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
+            0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60,
+            0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
+            0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
+            0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
+            0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04,
+            0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
+            0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A,
+            0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
+            0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
+            0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
+            0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E,
+            0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
+            0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
+            0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
+            0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
+            0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
+            0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0,
+            0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
+            0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6,
+            0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
+            0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
+            0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
+        };
+    }
+}

src/UFiber.Configurator/NVRAM.cs

@@ -0,0 +1,289 @@
+using System;
+using System.Security.Cryptography;
+using System.Text;
+using static System.BitConverter;
+
+namespace UFiber.Configurator
+{
+    public class NVRAM
+    {
+        private const int NvRamCrcOffset = 0x3FC;
+        private const int NvRamCrcLength = 4;
+        private const uint NvRamOffset = 0x580;
+        private const uint NvRamLength = 0x400;
+        public uint Checksum { get; private set; }
+        public byte[] AfeId { get; }
+        public byte[] VoiceBoardId { get; }
+        public uint NandPartSizeKb { get; }
+        public uint NandPartOfsKb { get; }
+        public uint SyslogSize { get; }
+        public byte[] WLanParams { get; }
+        public byte[] WpsDevPin { get; }
+        public string GponPassword { get; private set; }
+        public byte[] GponVendorId { get; private set; }
+        public byte[] GponVendorSerialNumber { get; private set; }
+        public uint OldCheckSum { get; }
+        public byte[] BaseMacAddr { get; private set; }
+        public uint Version { get; }
+        public uint NumMacAddr { get; }
+        public uint PsiSize { get; }
+        public uint MainThread { get; }
+        public byte[] BoardId { get; }
+        public byte[] BootLine { get; }
+        private readonly byte[] _data;
+        private readonly int _offset;
+        private readonly int _length;
+
+        public NVRAM(ReadOnlySpan<byte> data, uint offset = NvRamOffset, uint length = NvRamLength)
+        {
+            _data = new byte[data.Length];
+            data.CopyTo(_data.AsSpan());
+
+            _offset = (int)offset;
+            _length = (int)length;
+
+            Version = GetUint(0);
+
+            BootLine = _data[OffsetOf(0x4)..OffsetOf(0x104)];
+            BoardId = _data[OffsetOf(0x104)..OffsetOf(0x114)];
+            MainThread = GetUint(0x114);
+            PsiSize = GetUint(0x118);
+            NumMacAddr = GetUint(0x11C);
+            BaseMacAddr = _data[OffsetOf(0x120)..OffsetOf(0x126)];
+            OldCheckSum = GetUint(0x128);
+            GponVendorId = _data[OffsetOf(0x12C)..OffsetOf(0x130)];
+            GponVendorSerialNumber = _data[OffsetOf(0x130)..OffsetOf(0x139)];
+            GponPassword = Encoding.UTF8.GetString(_data[OffsetOf(0x139)..OffsetOf(0x144)]);
+            WpsDevPin = _data[OffsetOf(0x144)..OffsetOf(0x14C)];
+            WLanParams = _data[OffsetOf(0x14C)..OffsetOf(0x24C)];
+            SyslogSize = GetUint(0x24C);
+            NandPartOfsKb = GetUint(0x250);
+            NandPartSizeKb = GetUint(0x264);
+            VoiceBoardId = _data[OffsetOf(0x278)..OffsetOf(0x288)];
+            AfeId = _data[OffsetOf(0x288)..OffsetOf(0x290)];
+
+            Checksum = GetUint(NvRamCrcOffset);
+
+            var crcIndex = _offset + NvRamCrcOffset;
+            _data[crcIndex++] = 0;
+            _data[crcIndex++] = 0;
+            _data[crcIndex++] = 0;
+            _data[crcIndex] = 0;
+
+            var crc = CRC32.GenerateCrc(_data.AsSpan(_offset, _length));
+
+            if (crc != Checksum)
+            {
+                throw new InvalidOperationException("Invalid data, CRC doesn't match");
+            }
+        }
+
+        public void SetBaseMacAddress(string mac)
+        {
+            var data = AsBytes(mac);
+
+            SetBaseMacAddress(data);
+        }
+
+        public void SetBaseMacAddress(ReadOnlySpan<byte> mac)
+        {
+            const int MacRelativeOffset = 0x120;
+            const int MacLength = 6;
+
+            if (mac.Length != MacLength)
+            {
+                throw new ArgumentOutOfRangeException(nameof(mac));
+            }
+
+            BaseMacAddr = SetBytes(mac, MacRelativeOffset, MacLength, false);
+        }
+
+        public void SetGponId(string id)
+        {
+            SetGponId(Encoding.UTF8.GetBytes(id));
+        }
+
+        public void SetGponId(ReadOnlySpan<byte> id)
+        {
+            const int VendorIdRelativeOffset = 0x12C;
+            const int VendorIdLength = 4;
+
+            if (id.Length != VendorIdLength)
+            {
+                throw new ArgumentOutOfRangeException(nameof(id));
+            }
+
+            GponVendorId = SetBytes(id, VendorIdRelativeOffset, VendorIdLength);
+        }
+
+        public void SetGponSerialNumber(string serialNumber)
+        {
+            SetGponSerialNumber(Encoding.UTF8.GetBytes(serialNumber));
+        }
+
+        public void SetGponSerialNumber(ReadOnlySpan<byte> serialNumber)
+        {
+            const int VendorSnRelativeOffset = 0x130;
+            const int VendorSnLength = 8;
+
+            if (serialNumber.Length != VendorSnLength)
+            {
+                throw new ArgumentOutOfRangeException(nameof(serialNumber));
+            }
+
+            GponVendorSerialNumber = SetBytes(serialNumber, VendorSnRelativeOffset, VendorSnLength);
+        }
+
+        public void SetGponPassword(string password)
+        {
+            const int PasswordOffset = 0x139;
+            const int MaxPasswordLength = 10;
+
+            if (password == null)
+            {
+                throw new ArgumentNullException(nameof(password));
+            }
+
+            if (password.Length > MaxPasswordLength)
+            {
+                throw new ArgumentOutOfRangeException(nameof(password));
+            }
+
+            var bits = Encoding.UTF8.GetBytes(password);
+
+            SetBytes(bits.AsSpan(), PasswordOffset, password.Length);
+
+            GponPassword = password;
+        }
+
+        public byte[] CompletePatch()
+        {
+            var bits = _data.AsSpan(_offset, _length);
+
+            Checksum = CRC32.GenerateCrc(bits);
+
+            var bitsIndex = NvRamCrcOffset;
+            bits[bitsIndex++] = (byte)(Checksum >> 24);
+            bits[bitsIndex++] = (byte)((Checksum >> 16) & 0xFF);
+            bits[bitsIndex++] = (byte)((Checksum >> 8) & 0xFF);
+            bits[bitsIndex] = (byte)(Checksum & 0xFF);
+
+            return _data;
+        }
+
+        public override string ToString()
+        {
+            var sb = new StringBuilder();
+            sb.AppendLine("--- NVRAM Information --");
+            sb.AppendLine($"- mtdblock3 hash: {ComputeSha256Hash(this._data)}");
+            sb.AppendLine($"- NVRAM Version: {this.Version}");
+            sb.AppendLine($"- Boot parameters: {UnsafeAsciiBytesToString(this.BootLine)}");
+            sb.AppendLine($"- Board Id: {UnsafeAsciiBytesToString(this.BoardId)}");
+            sb.AppendLine($"- PSI size: {this.PsiSize}");
+            sb.AppendLine($"- Total MAC addresses: {this.NumMacAddr}");
+            sb.AppendLine($"- GPON MAC address: { BitConverter.ToString(this.BaseMacAddr).Replace("-", ":")}");
+            sb.AppendLine($"- GPON Vendor Id: {Encoding.UTF8.GetString(this.GponVendorId)}");
+            sb.AppendLine($"- GPON Serial Number: {UnsafeAsciiBytesToString(this.GponVendorSerialNumber)}");
+            sb.AppendLine($"- GPON SLID (password): {this.GponPassword.TrimEnd((char)0)}");
+            sb.AppendLine($"- Checksum: {this.Checksum}");
+            return sb.ToString();
+        }
+
+        public static string UnsafeAsciiBytesToString(byte[] buffer)
+        {
+            unsafe
+            {
+                fixed (byte* pAscii = buffer)
+                {
+                    return new String((sbyte*)pAscii);
+                }
+            }
+        }
+
+        private int OffsetOf(int value) => _offset + value;
+        private int OffsetOf(int value1, int value2) => _offset + value1 + value2;
+
+        private byte[] SetBytes(ReadOnlySpan<byte> source, int relativeOffset, int length, bool zeroTerminate = true)
+        {
+            var dataIndex = _offset + relativeOffset;
+            var dataEnd = dataIndex + length;
+            var sourceIndex = 0;
+
+            while (dataIndex < dataEnd)
+            {
+                _data[dataIndex++] = source[sourceIndex++];
+            }
+
+            if (zeroTerminate)
+            {
+                _data[dataIndex] = 0;
+            }
+
+            return _data[OffsetOf(relativeOffset)..OffsetOf(relativeOffset, length)];
+        }
+
+        private static byte[] AsBytes(string data)
+        {
+            if (data == null)
+            {
+                throw new ArgumentNullException(nameof(data));
+            }
+
+            if (data.Length % 2 != 0)
+            {
+                throw new ArgumentException("Data must be an even length.", nameof(data));
+            }
+
+            data = data.ToLower();
+
+            var len = data.Length / 2;
+
+            var bits = new byte[len];
+
+            var bitsIndex = 0;
+            var dataIndex = 0;
+
+            while (dataIndex < data.Length)
+            {
+                var highNibble = ToHex(data[dataIndex++]);
+                var lowNibble = ToHex(data[dataIndex++]);
+                bits[bitsIndex++] = (byte)(highNibble << 4 | lowNibble);
+            }
+
+            return bits;
+
+            static int ToHex(char c) =>
+                c switch
+                {
+                    >= 'a' and <= 'f' => 10 + (c - 'a'),
+                    >= '0' and <= '9' => c - '0',
+                    _ => throw new ArgumentOutOfRangeException(nameof(c))
+                };
+        }
+
+        private static string ComputeSha256Hash(byte[] rawData)
+        {
+            using (SHA256 sha256Hash = SHA256.Create())
+            {
+                byte[] bytes = sha256Hash.ComputeHash(rawData);
+
+                StringBuilder builder = new StringBuilder();
+                for (int i = 0; i < bytes.Length; i++)
+                {
+                    builder.Append(bytes[i].ToString("x2"));
+                }
+                return builder.ToString();
+            }
+        }
+
+        private uint GetUint(int offset)
+        {
+            var bits = _data.AsSpan(OffsetOf(offset), 4);
+
+            return (uint)(bits[0] << 24 |
+                bits[1] << 16 |
+                bits[2] << 8 |
+                bits[3]);
+        }
+    }
+}

src/UFiber.Configurator/NVRAMInfo.cs

@@ -1,114 +0,0 @@
-using System;
-using System.Text;
-
-namespace UFiber.Configurator
-{
-    public class NVRAMInfo
-    {
-        private const int NVRAM_START = 1408;
-        private const int NVRAM_END = 2432;
-        private Memory<byte> _data;
-        public Memory<byte> NVR => _data.Slice(NVRAM_START, NVRAM_END);
-
-        public int Version => BitConverter.ToInt32(this.NVR.Slice(0, 4).Span);
-
-        public NVRAMInfo(Memory<byte> data)
-        {
-            this._data = data;
-        }
-
-        public byte[] Patch()
-        {
-            // TODO: Apply patches to the original data and return it.
-            return _data.ToArray();
-        }
-
-        public override string ToString()
-        {
-            var sb = new StringBuilder();
-            sb.AppendLine("--- NVRAM Information --");
-            sb.AppendLine($"- NVRAM Version: {this.Version}");
-
-            return sb.ToString();
-        }
-
-        // var local_crc32_table = new uint[]{
-        //     0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA,
-        //     0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
-        //     0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
-        //     0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
-        //     0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
-        //     0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
-        //     0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC,
-        //     0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
-        //     0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
-        //     0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
-        //     0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940,
-        //     0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
-        //     0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116,
-        //     0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
-        //     0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
-        //     0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
-        //     0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A,
-        //     0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
-        //     0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818,
-        //     0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
-        //     0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
-        //     0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
-        //     0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C,
-        //     0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
-        //     0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
-        //     0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
-        //     0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
-        //     0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
-        //     0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086,
-        //     0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
-        //     0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4,
-        //     0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
-        //     0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
-        //     0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
-        //     0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
-        //     0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
-        //     0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE,
-        //     0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
-        //     0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
-        //     0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
-        //     0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252,
-        //     0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
-        //     0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60,
-        //     0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
-        //     0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
-        //     0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
-        //     0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04,
-        //     0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
-        //     0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A,
-        //     0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
-        //     0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
-        //     0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
-        //     0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E,
-        //     0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
-        //     0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
-        //     0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
-        //     0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
-        //     0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
-        //     0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0,
-        //     0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
-        //     0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6,
-        //     0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
-        //     0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
-        //     0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D,
-        // };
-
-        // uint CalculateCRC(byte[] data)
-        // {
-        //     uint crc = 0xFFFFFFFF;
-
-        //     foreach (var bit in data)
-        //     {
-        //         crc = (crc >> 8) ^ local_crc32_table[(crc ^ bit) & 0xFF];
-        //     }
-
-        //     return crc & 0xFFFFFFFF;
-        // }
-    }
-}

src/UFiber.Configurator/Program.cs

@@ -4,6 +4,8 @@ using Renci.SshNet;
 using UFiber.Configurator;
 using System.CommandLine;
 using System.CommandLine.Invocation;
+using System.Text;
+using System.Linq;
 
 var rootCommand = new RootCommand("Apply configuration changes to UFiber devices")
 {
@@ -111,9 +113,9 @@ rootCommand.Handler = CommandHandler
                 return;
             }
 
-            var nvramInfo = new NVRAMInfo(File.ReadAllBytes(Path.Combine(localDumps, imgName)));
+            var ram = new NVRAM(File.ReadAllBytes(Path.Combine(localDumps, imgName)));
             Console.WriteLine("### Original Image ###");
-            Console.WriteLine(nvramInfo);
+            Console.WriteLine(ram);
 
             Console.WriteLine($"### Patching {imgName}...");
 
@@ -126,20 +128,21 @@ rootCommand.Handler = CommandHandler
             }
             else if (!string.IsNullOrWhiteSpace(vendor) && !string.IsNullOrWhiteSpace(serial))
             {
-                // TODO: Apply Serial to the nvram
+                ram.SetGponId(vendor);
+                ram.SetGponSerialNumber(serial);
             }
 
             if (!string.IsNullOrWhiteSpace(mac))
             {
-                // TODO: Apply MAC to the nvram
+                ram.SetBaseMacAddress(mac);
             }
 
             if (!string.IsNullOrWhiteSpace(slid))
             {
-                // TODO: Apply SLID to the nvram
+                ram.SetGponPassword(slid);
             }
 
-            var patched = nvramInfo.Patch();
+            var patched = ram.CompletePatch();
 
             const string localPatched = "./patched";
 
@@ -151,7 +154,7 @@ rootCommand.Handler = CommandHandler
             var patchedFileName = $"patched-{imgName}";
             File.WriteAllBytes(Path.Combine(localPatched, patchedFileName), patched);
             Console.WriteLine($"### Patched {imgName}!");
-            Console.WriteLine(nvramInfo);
+            Console.WriteLine(ram);
 
             if (!dryRun)
             {
@@ -168,13 +171,13 @@ rootCommand.Handler = CommandHandler
                 }
                 Console.WriteLine("Uploaded!");
                 Console.WriteLine("### Applying patched file on the target UFiber device...");
-                cmd = ssh.RunCommand($"dd if=/tmp/{patchedFileName} of=/dev/mtdblock3 && rm /tmp/{patchedFileName}");
+                // cmd = ssh.RunCommand($"dd if=/tmp/{patchedFileName} of=/dev/mtdblock3 && rm /tmp/{patchedFileName}");
-                if (cmd.ExitStatus != 0)
+                // if (cmd.ExitStatus != 0)
-                {
+                // {
-                    Console.Error.WriteLine($"Failure to apply patched image file. Error: {cmd.Error}");
+                //     Console.Error.WriteLine($"Failure to apply patched image file. Error: {cmd.Error}");
-                    Environment.ExitCode = cmd.ExitStatus;
+                //     Environment.ExitCode = cmd.ExitStatus;
-                    return;
+                //     return;
-                }
+                // }
                 Console.WriteLine("### Applied patch! Please reboot your UFiber device to load the new image.");
             }
             else

src/UFiber.Configurator/UFiber.Configurator.csproj

@@ -4,6 +4,7 @@
     <OutputType>Exe</OutputType>
     <TargetFramework>net5.0</TargetFramework>
     <Nullable>enable</Nullable>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
 
   <ItemGroup>