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Node / meshcore / MeshCore / files / src / Packet.cpp

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src/Packet.cpp 890a2e2cffa98dea3ca88db3c3aba72ef23ff3f7 (890a2e2c) Text, 2.43 KB

Tff7b72#Tff7b72include T8b949e"Packet.h"
Tff7b72#Tff7b72include T8b949e<string.h>
Tff7b72#Tff7b72include T8b949e<SHA256.h>

Tff7b72namespace T7ee787mesh Tb4b4b4{

Te6edf3PacketTff7b72:Tff7b72:Te6edf3PacketTb4b4b4(Tb4b4b4) Tb4b4b4{
Te6edf3header Tff7b72= T79c0ff0Tb4b4b4;
Te6edf3path_len Tff7b72= T79c0ff0Tb4b4b4;
Te6edf3payload_len Tff7b72= T79c0ff0Tb4b4b4;
Tb4b4b4}

Tffa657bool Td2a8ffPacket::isValidPathLenTb4b4b4(Tffa657uint8_t Te6edf3path_lenTb4b4b4) Tb4b4b4{
Tffa657uint8_t Te6edf3hash_count Tff7b72= Te6edf3path_len Tff7b72& T79c0ff63Tb4b4b4;
Tffa657uint8_t Te6edf3hash_size Tff7b72= Tb4b4b4(Te6edf3path_len Tff7b72>Tff7b72> T79c0ff6Tb4b4b4) Tff7b72+ T79c0ff1Tb4b4b4;
Tff7b72if Tb4b4b4(Te6edf3hash_size Tff7b72=Tff7b72= T79c0ff4Tb4b4b4) Tff7b72return Tffa657falseTb4b4b4; T8b949e// Reserved for future
Tff7b72return Te6edf3hash_countTff7b72*Te6edf3hash_size Tff7b72<Tff7b72= Te6edf3MAX_PATH_SIZETb4b4b4;
Tb4b4b4}

Tffa657size_t Td2a8ffPacket::writePathTb4b4b4(Tffa657uint8_tTff7b72* Te6edf3destTb4b4b4, Tff7b72const Tffa657uint8_tTff7b72* Te6edf3srcTb4b4b4, Tffa657uint8_t Te6edf3path_lenTb4b4b4) Tb4b4b4{
Tffa657uint8_t Te6edf3hash_count Tff7b72= Te6edf3path_len Tff7b72& T79c0ff63Tb4b4b4;
Tffa657uint8_t Te6edf3hash_size Tff7b72= Tb4b4b4(Te6edf3path_len Tff7b72>Tff7b72> T79c0ff6Tb4b4b4) Tff7b72+ T79c0ff1Tb4b4b4;
Tffa657size_t Te6edf3len Tff7b72= Te6edf3hash_countTff7b72*Te6edf3hash_sizeTb4b4b4;
Tff7b72if Tb4b4b4(Te6edf3len Tff7b72> Te6edf3MAX_PATH_SIZETb4b4b4) Tb4b4b4{
Te6edf3MESH_DEBUG_PRINTLNTb4b4b4(Ta5d6ff"Ta5d6ffPacket::copyPath, invalid path_len=%dTa5d6ff"Tb4b4b4, Tb4b4b4(Tffa657uint32_tTb4b4b4)Te6edf3path_lenTb4b4b4)Tb4b4b4;
Tff7b72return T79c0ff0Tb4b4b4; T8b949e// Error
Tb4b4b4}
Te6edf3memcpyTb4b4b4(Te6edf3destTb4b4b4, Te6edf3srcTb4b4b4, Te6edf3lenTb4b4b4)Tb4b4b4;
Tff7b72return Te6edf3lenTb4b4b4;
Tb4b4b4}

Tffa657uint8_t Td2a8ffPacket::copyPathTb4b4b4(Tffa657uint8_tTff7b72* Te6edf3destTb4b4b4, Tff7b72const Tffa657uint8_tTff7b72* Te6edf3srcTb4b4b4, Tffa657uint8_t Te6edf3path_lenTb4b4b4) Tb4b4b4{
Te6edf3writePathTb4b4b4(Te6edf3destTb4b4b4, Te6edf3srcTb4b4b4, Te6edf3path_lenTb4b4b4)Tb4b4b4;
Tff7b72return Te6edf3path_lenTb4b4b4;
Tb4b4b4}

Tffa657int Td2a8ffPacket::getRawLengthTb4b4b4(Tb4b4b4) Tff7b72const Tb4b4b4{
Tff7b72return T79c0ff2 Tff7b72+ Te6edf3getPathByteLenTb4b4b4(Tb4b4b4) Tff7b72+ Te6edf3payload_len Tff7b72+ Tb4b4b4(Te6edf3hasTransportCodesTb4b4b4(Tb4b4b4) Tff7b72? T79c0ff4 Tff7b72: T79c0ff0Tb4b4b4)Tb4b4b4;
Tb4b4b4}

Tffa657void Td2a8ffPacket::calculatePacketHashTb4b4b4(Tffa657uint8_tTff7b72* Te6edf3hashTb4b4b4) Tff7b72const Tb4b4b4{
Te6edf3SHA256 Te6edf3shaTb4b4b4;
Tffa657uint8_t Te6edf3t Tff7b72= Te6edf3getPayloadTypeTb4b4b4(Tb4b4b4)Tb4b4b4;
Te6edf3shaTb4b4b4.Te6edf3updateTb4b4b4(Tff7b72&Te6edf3tTb4b4b4, T79c0ff1Tb4b4b4)Tb4b4b4;
Tff7b72if Tb4b4b4(Te6edf3t Tff7b72=Tff7b72= Te6edf3PAYLOAD_TYPE_TRACETb4b4b4) Tb4b4b4{
Te6edf3shaTb4b4b4.Te6edf3updateTb4b4b4(Tff7b72&Te6edf3path_lenTb4b4b4, Tff7b72sizeofTb4b4b4(Te6edf3path_lenTb4b4b4)Tb4b4b4)Tb4b4b4; T8b949e// CAVEAT: TRACE packets can revisit same node on return path
Tb4b4b4}
Te6edf3shaTb4b4b4.Te6edf3updateTb4b4b4(Te6edf3payloadTb4b4b4, Te6edf3payload_lenTb4b4b4)Tb4b4b4;
Te6edf3shaTb4b4b4.Te6edf3finalizeTb4b4b4(Te6edf3hashTb4b4b4, Te6edf3MAX_HASH_SIZETb4b4b4)Tb4b4b4;
Tb4b4b4}

Tffa657uint8_t Td2a8ffPacket::writeToTb4b4b4(Tffa657uint8_t Te6edf3destTb4b4b4[Tb4b4b4]Tb4b4b4) Tff7b72const Tb4b4b4{
Tffa657uint8_t Te6edf3i Tff7b72= T79c0ff0Tb4b4b4;
Te6edf3destTb4b4b4[Te6edf3iTff7b72+Tff7b72+Tb4b4b4] Tff7b72= Te6edf3headerTb4b4b4;
Tff7b72if Tb4b4b4(Te6edf3hasTransportCodesTb4b4b4(Tb4b4b4)Tb4b4b4) Tb4b4b4{
Te6edf3memcpyTb4b4b4(Tff7b72&Te6edf3destTb4b4b4[Te6edf3iTb4b4b4]Tb4b4b4, Tff7b72&Te6edf3transport_codesTb4b4b4[T79c0ff0Tb4b4b4]Tb4b4b4, T79c0ff2Tb4b4b4)Tb4b4b4; Te6edf3i Tff7b72+Tff7b72= T79c0ff2Tb4b4b4;
Te6edf3memcpyTb4b4b4(Tff7b72&Te6edf3destTb4b4b4[Te6edf3iTb4b4b4]Tb4b4b4, Tff7b72&Te6edf3transport_codesTb4b4b4[T79c0ff1Tb4b4b4]Tb4b4b4, T79c0ff2Tb4b4b4)Tb4b4b4; Te6edf3i Tff7b72+Tff7b72= T79c0ff2Tb4b4b4;
Tb4b4b4}
Te6edf3destTb4b4b4[Te6edf3iTff7b72+Tff7b72+Tb4b4b4] Tff7b72= Te6edf3path_lenTb4b4b4;
Te6edf3i Tff7b72+Tff7b72= Te6edf3writePathTb4b4b4(Tff7b72&Te6edf3destTb4b4b4[Te6edf3iTb4b4b4]Tb4b4b4, Te6edf3pathTb4b4b4, Te6edf3path_lenTb4b4b4)Tb4b4b4;
Te6edf3memcpyTb4b4b4(Tff7b72&Te6edf3destTb4b4b4[Te6edf3iTb4b4b4]Tb4b4b4, Te6edf3payloadTb4b4b4, Te6edf3payload_lenTb4b4b4)Tb4b4b4; Te6edf3i Tff7b72+Tff7b72= Te6edf3payload_lenTb4b4b4;
Tff7b72return Te6edf3iTb4b4b4;
Tb4b4b4}

Tffa657bool Td2a8ffPacket::readFromTb4b4b4(Tff7b72const Tffa657uint8_t Te6edf3srcTb4b4b4[Tb4b4b4]Tb4b4b4, Tffa657uint8_t Te6edf3lenTb4b4b4) Tb4b4b4{
Tffa657uint8_t Te6edf3i Tff7b72= T79c0ff0Tb4b4b4;
Te6edf3header Tff7b72= Te6edf3srcTb4b4b4[Te6edf3iTff7b72+Tff7b72+Tb4b4b4]Tb4b4b4;
Tff7b72if Tb4b4b4(Te6edf3hasTransportCodesTb4b4b4(Tb4b4b4)Tb4b4b4) Tb4b4b4{
Te6edf3memcpyTb4b4b4(Tff7b72&Te6edf3transport_codesTb4b4b4[T79c0ff0Tb4b4b4]Tb4b4b4, Tff7b72&Te6edf3srcTb4b4b4[Te6edf3iTb4b4b4]Tb4b4b4, T79c0ff2Tb4b4b4)Tb4b4b4; Te6edf3i Tff7b72+Tff7b72= T79c0ff2Tb4b4b4;
Te6edf3memcpyTb4b4b4(Tff7b72&Te6edf3transport_codesTb4b4b4[T79c0ff1Tb4b4b4]Tb4b4b4, Tff7b72&Te6edf3srcTb4b4b4[Te6edf3iTb4b4b4]Tb4b4b4, T79c0ff2Tb4b4b4)Tb4b4b4; Te6edf3i Tff7b72+Tff7b72= T79c0ff2Tb4b4b4;
Tb4b4b4} Tff7b72else Tb4b4b4{
Te6edf3transport_codesTb4b4b4[T79c0ff0Tb4b4b4] Tff7b72= Te6edf3transport_codesTb4b4b4[T79c0ff1Tb4b4b4] Tff7b72= T79c0ff0Tb4b4b4;
Tb4b4b4}
Te6edf3path_len Tff7b72= Te6edf3srcTb4b4b4[Te6edf3iTff7b72+Tff7b72+Tb4b4b4]Tb4b4b4;
Tff7b72if Tb4b4b4(Tff7b72!Te6edf3isValidPathLenTb4b4b4(Te6edf3path_lenTb4b4b4)Tb4b4b4) Tff7b72return Tffa657falseTb4b4b4; T8b949e// bad encoding

Tffa657uint8_t Te6edf3bl Tff7b72= Te6edf3getPathByteLenTb4b4b4(Tb4b4b4)Tb4b4b4;
Te6edf3memcpyTb4b4b4(Te6edf3pathTb4b4b4, Tff7b72&Te6edf3srcTb4b4b4[Te6edf3iTb4b4b4]Tb4b4b4, Te6edf3blTb4b4b4)Tb4b4b4; Te6edf3i Tff7b72+Tff7b72= Te6edf3blTb4b4b4;

Tff7b72if Tb4b4b4(Te6edf3i Tff7b72>Tff7b72= Te6edf3lenTb4b4b4) Tff7b72return Tffa657falseTb4b4b4; T8b949e// bad encoding
Te6edf3payload_len Tff7b72= Te6edf3len Tff7b72- Te6edf3iTb4b4b4;
Tff7b72if Tb4b4b4(Te6edf3payload_len Tff7b72> Tff7b72sizeofTb4b4b4(Te6edf3payloadTb4b4b4)Tb4b4b4) Tff7b72return Tffa657falseTb4b4b4; T8b949e// bad encoding
Te6edf3memcpyTb4b4b4(Te6edf3payloadTb4b4b4, Tff7b72&Te6edf3srcTb4b4b4[Te6edf3iTb4b4b4]Tb4b4b4, Te6edf3payload_lenTb4b4b4)Tb4b4b4; T8b949e//i += payload_len;
Tff7b72return Tffa657trueTb4b4b4; T8b949e// success
Tb4b4b4}

Tb4b4b4}

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