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@@ -181,13 +181,32 @@ bool Packet::CanReadFromPacket(uint byte
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}
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/**
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* Reads the packet size from the raw packet and stores it in the packet->size
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* Check whether the packet, given the position of the "write" pointer, has read
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* enough of the packet to contain its size.
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* @return True iff there is enough data in the packet to contain the packet's size.
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*/
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void Packet::ReadRawPacketSize()
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bool Packet::HasPacketSizeData() const
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{
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return this->pos >= sizeof(PacketSize);
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}
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/**
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* Reads the packet size from the raw packet and stores it in the packet->size
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* @return True iff the packet size seems plausible.
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*/
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bool Packet::ParsePacketSize()
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{
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assert(this->cs != nullptr && this->next == nullptr);
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this->size = (PacketSize)this->buffer[0];
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this->size += (PacketSize)this->buffer[1] << 8;
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/* If the size of the packet is less than the bytes required for the size and type of
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* the packet, or more than the allowed limit, then something is wrong with the packet.
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* In those cases the packet can generally be regarded as containing garbage data. */
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if (this->size < sizeof(PacketSize) + sizeof(PacketType) || this->size > SEND_MTU) return false;
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this->pos = sizeof(PacketSize);
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return true;
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}
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/**
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@@ -195,8 +214,6 @@ void Packet::ReadRawPacketSize()
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*/
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void Packet::PrepareToRead()
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{
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this->ReadRawPacketSize();
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/* Put the position on the right place */
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this->pos = sizeof(PacketSize);
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}
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