inet::serializer::UDPSerializer Class Reference

Converts between UDPPacket and binary (network byte order) UDP header. More...

#include <UDPSerializer.h>

Inheritance diagram for inet::serializer::UDPSerializer:

Public Member Functions
	UDPSerializer (const char *name=nullptr)
Public Member Functions inherited from inet::serializer::SerializerBase
	SerializerBase (const char *name=nullptr)
void	serializePacket (const cPacket *pkt, Buffer &b, Context &context)
cPacket *	deserializePacket (const Buffer &b, Context &context)

Protected Member Functions
virtual void	serialize (const cPacket *pkt, Buffer &b, Context &context) override
	Serializes a cPacket for transmission on the wire. More...
virtual cPacket *	deserialize (const Buffer &b, Context &context) override
	Puts a packet sniffed from the wire into an EtherFrame. More...

Additional Inherited Members
Static Public Member Functions inherited from inet::serializer::SerializerBase
static SerializerBase &	lookupSerializer (const cPacket *pkt, Context &context, ProtocolGroup group, int id)
static void	lookupAndSerialize (const cPacket *pkt, Buffer &b, Context &context, ProtocolGroup group, int id, unsigned int maxLength=(unsigned int)(-1))
static SerializerBase &	lookupDeserializer (Context &context, ProtocolGroup group, int id)
static cPacket *	lookupAndDeserialize (const Buffer &b, Context &context, ProtocolGroup group, int id, unsigned int maxLength=(unsigned int)(-1))

Detailed Description

Converts between UDPPacket and binary (network byte order) UDP header.

Constructor & Destructor Documentation

inet::serializer::UDPSerializer::UDPSerializer ( const char *  name = nullptr )

inline

: SerializerBase(name) {}

Member Function Documentation

cPacket * inet::serializer::UDPSerializer::deserialize ( const Buffer &  b, Context &  context  )

overrideprotectedvirtual

Puts a packet sniffed from the wire into an EtherFrame.

Implements inet::serializer::SerializerBase.

{
    ASSERT(b.getPos() == 0);
    UDPPacket *pkt = new UDPPacket("parsed-udp");
    pkt->setSourcePort(b.readUint16());
    pkt->setDestinationPort(b.readUint16());
    unsigned int length = b.readUint16();
    pkt->setTotalLengthField(length);
    uint16_t chksum = b.readUint16();
    if (length > UDP_HEADER_BYTES) {
        unsigned int payloadLength = length - UDP_HEADER_BYTES;
        Buffer subBuffer(b, payloadLength);
        cPacket *encapPacket = serializers.byteArraySerializer.deserializePacket(subBuffer, c);
        b.accessNBytes(payloadLength);
        pkt->encapsulate(encapPacket);
    }
    if (chksum != 0 && c.l3AddressesPtr && c.l3AddressesLength)
        chksum = TCPIPchecksum::checksum(IP_PROT_UDP, b._getBuf(), b.getPos(), c.l3AddressesPtr, c.l3AddressesLength);
    else chksum = 0;
    if (length < UDP_HEADER_BYTES || chksum != 0 || pkt->getByteLength() != length)
        pkt->setBitError(true);
    return pkt;
}

void inet::serializer::UDPSerializer::serialize ( const cPacket *  pkt, Buffer &  b, Context &  context  )

overrideprotectedvirtual

Serializes a cPacket for transmission on the wire.

Returns the length of data written into buffer.

Implements inet::serializer::SerializerBase.

{
    ASSERT(b.getPos() == 0);
    const UDPPacket *pkt = check_and_cast<const UDPPacket *>(_pkt);
    int packetLength = pkt->getByteLength();
    b.writeUint16(pkt->getSourcePort());
    b.writeUint16(pkt->getDestinationPort());
    b.writeUint16(pkt->getTotalLengthField());
    unsigned int chksumPos = b.getPos();
    b.writeUint16(0);  // place for checksum
    const cPacket *encapPkt = pkt->getEncapsulatedPacket();
    if (encapPkt) {
        SerializerBase::lookupAndSerialize(encapPkt, b, c, UNKNOWN, 0);
    }
    else {
        b.fillNBytes(packetLength - UDP_HEADER_BYTES, 0);   // payload place
    }
    unsigned int endPos = b.getPos();
    b.writeUint16To(chksumPos, TCPIPchecksum::checksum(IP_PROT_UDP, b._getBuf(), endPos, c.l3AddressesPtr, c.l3AddressesLength));
}

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The documentation for this class was generated from the following files:

• UDPSerializer.h
• UDPSerializer.cc