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|---|---|---|---|
| 1 | // ====================================================================== | ||
| 2 | // \title AckPdu.cpp | ||
| 3 | // \author Brian Campuzano | ||
| 4 | // \brief cpp file for CFDP ACK (Acknowledge) PDU | ||
| 5 | // ====================================================================== | ||
| 6 | |||
| 7 | #include <Fw/Types/Assert.hpp> | ||
| 8 | #include <Svc/Ccsds/CfdpManager/Types/AckPdu.hpp> | ||
| 9 | |||
| 10 | namespace Svc { | ||
| 11 | namespace Ccsds { | ||
| 12 | namespace Cfdp { | ||
| 13 | |||
| 14 | 25 | void AckPdu::initialize(PduDirection direction, | |
| 15 | Cfdp::Class::T txmMode, | ||
| 16 | EntityId sourceEid, | ||
| 17 | TransactionSeq transactionSeq, | ||
| 18 | EntityId destEid, | ||
| 19 | FileDirective directiveCode, | ||
| 20 | U8 directiveSubtypeCode, | ||
| 21 | ConditionCode conditionCode, | ||
| 22 | AckTxnStatus transactionStatus) { | ||
| 23 | // Initialize header with PduTypeEnum::ACKNOWLEDGMENT type | ||
| 24 | 25 | this->m_header.initialize(PduTypeEnum::ACKNOWLEDGMENT, direction, txmMode, sourceEid, transactionSeq, destEid); | |
| 25 | |||
| 26 | 25 | this->m_directiveCode = directiveCode; | |
| 27 | 25 | this->m_directiveSubtypeCode = directiveSubtypeCode; | |
| 28 | 25 | this->m_conditionCode = conditionCode; | |
| 29 | 25 | this->m_transactionStatus = transactionStatus; | |
| 30 | 25 | } | |
| 31 | |||
| 32 | 49 | U32 AckPdu::getBufferSize() const { | |
| 33 | 49 | U32 size = this->m_header.getBufferSize(); | |
| 34 | |||
| 35 | // Directive code: 1 byte (FileDirective::FILE_DIRECTIVE_ACK) | ||
| 36 | // Directive and subtype code (bit-packed): 1 byte | ||
| 37 | // Condition code and transaction status (bit-packed): 1 byte | ||
| 38 | 49 | size += static_cast<U32>(sizeof(U8) + sizeof(U8) + sizeof(U8)); | |
| 39 | |||
| 40 | 49 | return size; | |
| 41 | } | ||
| 42 | |||
| 43 | 25 | Fw::SerializeStatus AckPdu::serializeTo(Fw::SerialBufferBase& buffer, Fw::Endianness mode) const { | |
| 44 | 25 | return this->toSerialBuffer(buffer); | |
| 45 | } | ||
| 46 | |||
| 47 | 17 | Fw::SerializeStatus AckPdu::deserializeFrom(Fw::SerialBufferBase& buffer, Fw::Endianness mode) { | |
| 48 | // Deserialize header first | ||
| 49 |
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17 | Fw::SerializeStatus status = this->m_header.fromSerialBuffer(buffer); |
| 50 |
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17 | if (status != Fw::FW_SERIALIZE_OK) { |
| 51 | 1 | return status; | |
| 52 | } | ||
| 53 | |||
| 54 | // Validate this is a directive PDU (not file data) | ||
| 55 |
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16 | if (this->m_header.m_pduType != PduType::PDU_TYPE_DIRECTIVE) { |
| 56 | ✗ | return Fw::FW_DESERIALIZE_TYPE_MISMATCH; | |
| 57 | } | ||
| 58 | |||
| 59 | // Validate directive code | ||
| 60 | 16 | U8 directiveCode; | |
| 61 |
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16 | status = buffer.deserializeTo(directiveCode); |
| 62 |
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16 | if (status != Fw::FW_SERIALIZE_OK) { |
| 63 | ✗ | return status; | |
| 64 | } | ||
| 65 |
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16 | if (directiveCode != static_cast<U8>(FileDirective::FILE_DIRECTIVE_ACK)) { |
| 66 | ✗ | return Fw::FW_DESERIALIZE_TYPE_MISMATCH; | |
| 67 | } | ||
| 68 | |||
| 69 | // Now set the type to PduTypeEnum::ACKNOWLEDGMENT since we've validated it | ||
| 70 | 16 | this->m_header.m_type = PduTypeEnum::ACKNOWLEDGMENT; | |
| 71 | |||
| 72 | // Deserialize the ACK body | ||
| 73 |
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16 | return this->fromSerialBuffer(buffer); |
| 74 | } | ||
| 75 | |||
| 76 | 25 | Fw::SerializeStatus AckPdu::toSerialBuffer(Fw::SerialBufferBase& serialBuffer) const { | |
| 77 | 25 | FW_ASSERT(this->m_header.m_type == PduTypeEnum::ACKNOWLEDGMENT); | |
| 78 | |||
| 79 | // Calculate PDU data length (everything after header) | ||
| 80 |
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25 | U32 dataLength = this->getBufferSize() - this->m_header.getBufferSize(); |
| 81 | |||
| 82 | // Update header with data length | ||
| 83 | 25 | PduHeader headerCopy = this->m_header; | |
| 84 | 25 | headerCopy.setPduDataLength(static_cast<U16>(dataLength)); | |
| 85 | |||
| 86 | // Serialize header | ||
| 87 |
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25 | Fw::SerializeStatus status = headerCopy.toSerialBuffer(serialBuffer); |
| 88 |
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25 | if (status != Fw::FW_SERIALIZE_OK) { |
| 89 | ✗ | return status; | |
| 90 | } | ||
| 91 | |||
| 92 | // Directive code (ACK = 6) | ||
| 93 | 25 | U8 directiveCodeByte = static_cast<U8>(FileDirective::FILE_DIRECTIVE_ACK); | |
| 94 |
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25 | status = serialBuffer.serializeFrom(directiveCodeByte); |
| 95 |
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25 | if (status != Fw::FW_SERIALIZE_OK) { |
| 96 | ✗ | return status; | |
| 97 | } | ||
| 98 | |||
| 99 | // Directive and subtype code (bit-packed into 1 byte) | ||
| 100 | // Bits 7-4: Directive code being acknowledged (4 bits) | ||
| 101 | // Bits 3-0: Directive subtype code (4 bits) | ||
| 102 | 25 | U8 directiveAndSubtype = 0; | |
| 103 | 25 | directiveAndSubtype = | |
| 104 | 25 | static_cast<U8>(directiveAndSubtype | static_cast<U8>((static_cast<U8>(this->m_directiveCode) & 0x0FU) << 4)); | |
| 105 | 25 | directiveAndSubtype = static_cast<U8>(directiveAndSubtype | (this->m_directiveSubtypeCode & 0x0FU)); | |
| 106 | |||
| 107 |
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25 | status = serialBuffer.serializeFrom(directiveAndSubtype); |
| 108 |
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25 | if (status != Fw::FW_SERIALIZE_OK) { |
| 109 | ✗ | return status; | |
| 110 | } | ||
| 111 | |||
| 112 | // Condition code and transaction status (bit-packed into 1 byte) | ||
| 113 | // Bits 7-4: Condition code (4 bits) | ||
| 114 | // Bits 3-2: Spare (0) | ||
| 115 | // Bits 1-0: Transaction status (2 bits) | ||
| 116 | 25 | U8 ccAndStatus = 0; | |
| 117 | 25 | ccAndStatus = static_cast<U8>(ccAndStatus | static_cast<U8>((static_cast<U8>(this->m_conditionCode) & 0x0FU) << 4)); | |
| 118 | 25 | ccAndStatus = static_cast<U8>(ccAndStatus | (static_cast<U8>(this->m_transactionStatus) & 0x03U)); | |
| 119 | |||
| 120 |
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25 | status = serialBuffer.serializeFrom(ccAndStatus); |
| 121 |
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25 | if (status != Fw::FW_SERIALIZE_OK) { |
| 122 | ✗ | return status; | |
| 123 | } | ||
| 124 | |||
| 125 | 25 | return Fw::FW_SERIALIZE_OK; | |
| 126 | } | ||
| 127 | |||
| 128 | 16 | Fw::SerializeStatus AckPdu::fromSerialBuffer(Fw::SerialBufferBase& serialBuffer) { | |
| 129 | 16 | FW_ASSERT(this->m_header.m_type == PduTypeEnum::ACKNOWLEDGMENT); | |
| 130 | |||
| 131 | // Directive code already read by fromBuffer() | ||
| 132 | |||
| 133 | // Directive and subtype code (packed byte) | ||
| 134 | 16 | U8 directiveAndSubtype; | |
| 135 |
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16 | Fw::SerializeStatus status = serialBuffer.deserializeTo(directiveAndSubtype); |
| 136 |
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16 | if (status != Fw::FW_SERIALIZE_OK) { |
| 137 | ✗ | return status; | |
| 138 | } | ||
| 139 | |||
| 140 | // Extract fields from directive and subtype byte: | ||
| 141 | // Bits 7-4: Directive code being acknowledged | ||
| 142 | // Bits 3-0: Directive subtype code | ||
| 143 | 16 | U8 directiveCodeVal = (directiveAndSubtype >> 4) & 0x0F; | |
| 144 | 16 | U8 subtypeCodeVal = directiveAndSubtype & 0x0F; | |
| 145 | |||
| 146 | 16 | this->m_directiveCode = static_cast<FileDirective>(directiveCodeVal); | |
| 147 | 16 | this->m_directiveSubtypeCode = subtypeCodeVal; | |
| 148 | |||
| 149 | // Condition code and transaction status (packed byte) | ||
| 150 | 16 | U8 ccAndStatus; | |
| 151 |
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16 | status = serialBuffer.deserializeTo(ccAndStatus); |
| 152 |
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16 | if (status != Fw::FW_SERIALIZE_OK) { |
| 153 | ✗ | return status; | |
| 154 | } | ||
| 155 | |||
| 156 | // Extract fields from condition code and transaction status byte: | ||
| 157 | // Bits 7-4: Condition code | ||
| 158 | // Bits 3-2: Spare | ||
| 159 | // Bits 1-0: Transaction status | ||
| 160 | 16 | U8 conditionCodeVal = (ccAndStatus >> 4) & 0x0F; | |
| 161 | 16 | U8 transactionStatusVal = ccAndStatus & 0x03; | |
| 162 | |||
| 163 | 16 | this->m_conditionCode = static_cast<ConditionCode>(conditionCodeVal); | |
| 164 | 16 | this->m_transactionStatus = static_cast<AckTxnStatus>(transactionStatusVal); | |
| 165 | |||
| 166 | 16 | return Fw::FW_SERIALIZE_OK; | |
| 167 | } | ||
| 168 | |||
| 169 | } // namespace Cfdp | ||
| 170 | } // namespace Ccsds | ||
| 171 | } // namespace Svc | ||
| 172 |