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Diffstat (limited to 'LibOVR/Src/OVR_SerialFormat.cpp')
| -rw-r--r-- | LibOVR/Src/OVR_SerialFormat.cpp | 445 |
1 files changed, 445 insertions, 0 deletions
diff --git a/LibOVR/Src/OVR_SerialFormat.cpp b/LibOVR/Src/OVR_SerialFormat.cpp new file mode 100644 index 0000000..abe68e5 --- /dev/null +++ b/LibOVR/Src/OVR_SerialFormat.cpp @@ -0,0 +1,445 @@ +/************************************************************************************ + +Filename : OVR_System.cpp +Content : General kernel initialization/cleanup, including that + of the memory allocator. +Created : September 19, 2012 +Notes : + +Copyright : Copyright 2014 Oculus VR, Inc. All Rights reserved. + +Licensed under the Oculus VR Rift SDK License Version 3.1 (the "License"); +you may not use the Oculus VR Rift SDK except in compliance with the License, +which is provided at the time of installation or download, or which +otherwise accompanies this software in either electronic or hard copy form. + +You may obtain a copy of the License at + +http://www.oculusvr.com/licenses/LICENSE-3.1 + +Unless required by applicable law or agreed to in writing, the Oculus VR SDK +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. + +************************************************************************************/ + +#include "OVR_SerialFormat.h" + +namespace OVR { + + +//// Serial Format Detection + +SerialFormatType DetectBufferFormat(uint8_t firstByte, int sizeInBytes) +{ + switch (firstByte) + { + case SerialFormatType_DK2: + if (sizeInBytes == 12) + { + return SerialFormatType_DK2; + } + break; + default: + break; + } + + return SerialFormatType_Invalid; +} + + +//// DK2 Helpers + +static bool ValidDK2ProductId(int x) +{ + switch (x) + { + case DK2ProductId_DK1: + case DK2ProductId_DK2: + case DK2ProductId_Refurb: + return true; + default: + break; + } + + return false; +} + +static bool ValidDK2PartId(int x) +{ + switch (x) + { + case DK2PartId_HMD: + case DK2PartId_PTC: + case DK2PartId_Carton: + return true; + default: + break; + } + + return false; +} + + +//// DK2BinarySerialFormat + +bool DK2BinarySerialFormat::FromBuffer(const uint8_t buffer[12], bool allowUnknownTypes) +{ + // Format Type must be 0 + + int formatType = buffer[0]; + + if (formatType != SerialFormatType_DK2) + { + return false; + } + + // Product Id + + int productId = buffer[1] >> 4; + + if (!allowUnknownTypes && !ValidDK2ProductId(productId)) + { + return false; + } + + ProductId = (DK2ProductId)productId; + + // Part Id + + int partId = buffer[1] & 15; + + if (!allowUnknownTypes && !ValidDK2PartId(partId)) + { + return false; + } + + PartId = (DK2PartId)partId; + + // Minutes Since Epoch (May 1, 2014) + + MinutesSinceEpoch = buffer[4] | ((uint32_t)buffer[3] << 8) | ((uint32_t)buffer[2] << 16); + + // Unit number on that day + + UnitNumber = buffer[6] | ((uint32_t)buffer[5] << 8); + + // Hash of MAC address + + MacHash[0] = buffer[7]; + MacHash[1] = buffer[8]; + MacHash[2] = buffer[9]; + MacHash[3] = buffer[10]; + MacHash[4] = buffer[11]; + + return true; +} + +void DK2BinarySerialFormat::ToBuffer(uint8_t buffer[12]) +{ + // Serialize to buffer + buffer[0] = SerialFormatType_DK2; + buffer[1] = (uint8_t)((ProductId << 4) | (PartId)); + buffer[2] = (uint8_t)(MinutesSinceEpoch >> 16); + buffer[3] = (uint8_t)(MinutesSinceEpoch >> 8); + buffer[4] = (uint8_t)MinutesSinceEpoch; + buffer[5] = (uint8_t)(UnitNumber >> 8); + buffer[6] = (uint8_t)UnitNumber; + + buffer[7] = MacHash[0]; + buffer[8] = MacHash[1]; + buffer[9] = MacHash[2]; + buffer[10] = MacHash[3]; + buffer[11] = MacHash[4]; +} + +bool DK2BinarySerialFormat::operator==(const DK2BinarySerialFormat& rhs) +{ + if (ProductId != rhs.ProductId) + return false; + if (PartId != rhs.PartId) + return false; + if (MinutesSinceEpoch != rhs.MinutesSinceEpoch) + return false; + if (UnitNumber != rhs.UnitNumber) + return false; + for (int ii = 0; ii < 5; ++ii) + { + if (MacHash[ii] != rhs.MacHash[ii]) + return false; + } + return true; +} + + +//// DK2PrintedSerialFormat + +// Base-32 Crockford decoding rules: +// 0 o O => 0 +// 1 i | I L l => 1 +// 2, 3, 4, 5, 6, 7, 8, 9 => 2 - 9 +// a, b, c, d, e, f, g, h => 10 - 17 +// j, k => 18, 19 +// m, n => 20, 21 +// p, q, r, s, t => 22, 23, 24, 25, 26 +// v, w, x, y, z => 27, 28, 29, 30, 31 +static const char Base32FromChar[256] = { + // Null - Unit Separator + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // (sp)!"#$%&'()*+,-./ + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + // 0123456789:;<=>? + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1, + // @ - _ (upper case) + -1, 10, 11, 12, 13, 14, 15, 16, 17, 1, 18, 19, 1, 20, 21, 0, + 22, 23, 24, 25, 26, -1, 27, 28, 29, 30, 31, -1, -1, -1, -1, -1, + // ` - DEL (lower case) + -1, 10, 11, 12, 13, 14, 15, 16, 17, 1, 18, 19, 1, 20, 21, 0, + 22, 23, 24, 25, 26, -1, 27, 28, 29, 30, 31, -1, 1, -1, -1, -1, + + // Extended ASCII: + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 +}; + +// Base-32 Crockford encoding rules: +// 0-9 => 0-9 +// 10 - 17 => a, b, c, d, e, f, g, h +// 18, 19 => j, k +// 20, 21 => m, n +// 22, 23, 24, 25, 26 => p, q, r, s, t +// 27, 28, 29, 30, 31 => v, w, x, y, z +static const char* CharFromBase32 = "0123456789ABCDEFGHJKMNPQRSTVWXYZ"; + +bool DK2PrintedSerialFormat::FromBase32(const char* str, bool allowUnknownTypes) +{ + // Note: Truncated strings get caught by returning negative values from the table like other invalid characters + + // Product Id + + int productId = Base32FromChar[str[0]]; + if (productId < 0 || (!allowUnknownTypes && !ValidDK2ProductId(productId))) + { + return false; + } + + ProductId = (DK2ProductId)productId; + + // Label Type + + int labelType = Base32FromChar[str[1]]; + if (labelType < 0 || (!allowUnknownTypes && !ValidDK2PartId(labelType))) + { + return false; + } + + LabelType = (DK2LabelType)labelType; + + uint8_t dataBytes[7]; + for (int ii = 0; ii < 7; ++ii) + { + int c = Base32FromChar[str[2 + ii]]; + if (c < 0) return false; + dataBytes[ii] = (uint8_t)c; + } + + // Minutes Since Epoch + + MinutesSinceEpoch = dataBytes[3] | ((uint32_t)dataBytes[2] << 5) | ((uint32_t)dataBytes[1] << 10) | ((uint32_t)dataBytes[0] << 15); + + // Unit Number + + UnitNumber = dataBytes[6] | ((uint32_t)dataBytes[5] << 5) | ((uint32_t)dataBytes[4] << 10); + + // MAC Hash + + for (int ii = 0; ii < 3; ++ii) + { + int c = Base32FromChar[str[9 + ii]]; + if (c < 0) + { + return false; + } + + MacHashLow[ii] = (uint8_t)c; + } + + // String must be exactly 12 characters + if (str[12] != '\0') + { + return false; + } + + return true; +} + +String DK2PrintedSerialFormat::ToBase32() +{ + String s; + + s += CharFromBase32[ProductId]; + s += CharFromBase32[LabelType]; + s += CharFromBase32[(MinutesSinceEpoch >> 15) & 31]; + s += CharFromBase32[(MinutesSinceEpoch >> 10) & 31]; + s += CharFromBase32[(MinutesSinceEpoch >> 5) & 31]; + s += CharFromBase32[MinutesSinceEpoch & 31]; + s += CharFromBase32[(UnitNumber >> 10) & 31]; + s += CharFromBase32[(UnitNumber >> 5) & 31]; + s += CharFromBase32[UnitNumber & 31]; + s += CharFromBase32[MacHashLow[0] & 31]; + s += CharFromBase32[MacHashLow[1] & 31]; + s += CharFromBase32[MacHashLow[2] & 31]; + + return s; +} + +bool DK2PrintedSerialFormat::operator==(const DK2PrintedSerialFormat& rhs) +{ + if (ProductId != rhs.ProductId) + return false; + if (LabelType != rhs.LabelType) + return false; + if (MinutesSinceEpoch != rhs.MinutesSinceEpoch) + return false; + if (UnitNumber != rhs.UnitNumber) + return false; + for (int ii = 0; ii < 3; ++ii) + { + if (MacHashLow[ii] != rhs.MacHashLow[ii]) + return false; + } + return true; +} + +bool DK2PrintedSerialFormat::operator==(const DK2BinarySerialFormat& rhs) +{ + if (ProductId != rhs.ProductId) + return false; + if (LabelType != rhs.PartId) + return false; + if (MinutesSinceEpoch != rhs.MinutesSinceEpoch) + return false; + if (UnitNumber != rhs.UnitNumber) + return false; + for (int ii = 0; ii < 3; ++ii) + { + if (MacHashLow[ii] != (rhs.MacHash[ii] & 31)) + return false; + } + return true; +} + +void DK2PrintedSerialFormat::FromBinary(const DK2BinarySerialFormat& bin) +{ + ProductId = bin.ProductId; + LabelType = bin.PartId; + MinutesSinceEpoch = bin.MinutesSinceEpoch; + UnitNumber = bin.UnitNumber; + MacHashLow[0] = bin.MacHash[0] & 31; + MacHashLow[1] = bin.MacHash[1] & 31; + MacHashLow[2] = bin.MacHash[2] & 31; +} + + +//// Unit Tests + +#ifdef SERIAL_FORMAT_UNIT_TEST + +int DecodeBase32(char ch) +{ + if (ch >= '2' && ch <= '9') + return 2 + ch - '2'; + if (ch >= 'a' && ch <= 'h') + return 10 + ch - 'a'; + if (ch >= 'A' && ch <= 'H') + return 10 + ch - 'A'; + if (ch >= 'j' && ch <= 'k') + return 18 + ch - 'j'; + if (ch >= 'J' && ch <= 'K') + return 18 + ch - 'J'; + if (ch >= 'm' && ch <= 'n') + return 20 + ch - 'm'; + if (ch >= 'M' && ch <= 'N') + return 20 + ch - 'M'; + if (ch >= 'p' && ch <= 't') + return 22 + ch - 'p'; + if (ch >= 'P' && ch <= 'T') + return 22 + ch - 'P'; + if (ch >= 'v' && ch <= 'z') + return 27 + ch - 'v'; + if (ch >= 'V' && ch <= 'Z') + return 27 + ch - 'V'; + + switch (ch) + { + case '0': + case 'o': + case 'O': + return 0; + case '1': + case 'i': + case '|': + case 'I': + case 'L': + case 'l': + return 1; + } + + return -1; +} + +void TestSerialFormatStuff() +{ + for (int ii = 0; ii < 256; ++ii) + { + OVR_ASSERT(Base32FromChar[ii] == (char)DecodeBase32((char)ii)); + } + + DK2BinarySerialFormat sa; + sa.ProductId = DK2ProductId_DK2; + sa.PartId = DK2PartId_HMD; + sa.MinutesSinceEpoch = 65000; + sa.UnitNumber = 2; + sa.MacHash[0] = 0xa1; + sa.MacHash[1] = 0xb2; + sa.MacHash[2] = 0xc3; + sa.MacHash[3] = 0xd4; + sa.MacHash[4] = 0xe5; + + uint8_t buffer[12]; + sa.ToBuffer(buffer); + + DK2BinarySerialFormat sb; + OVR_ASSERT(sb.FromBuffer(buffer)); + + OVR_ASSERT(sa == sb); + + DK2PrintedSerialFormat psn; + psn.FromBinary(sb); + + OVR_ASSERT(psn == sa); + + String s = psn.ToBase32(); + + DK2PrintedSerialFormat psn2; + psn2.FromBase32(s.ToCStr()); + + OVR_ASSERT(psn == psn2); +} + +#endif // SERIAL_FORMAT_UNIT_TEST + + +} // OVR |