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MPacketContext Class Reference

class MPacketContext : public MInetBase

Provides a packet context as a number of (key, value) pairs.

The rules for construction of the key are:

The low eight bits of the key contain always the protocol number (extension header) being implemented by the hook.
If the protocol is destination option or hop-by-hop option, the implemented option types are communicated to the default handler by adding a non-zero value to the packet context with a key computed as "(option-type << 8) | protocol".

Since: v7.0

Inherits from

MPacketContext
- MInetBase

Public Member Functions
TUint32	HookValue (const TUint32 )
TInt	SetHookValue (const TUint32 , const TUint32 )

Inherited Functions
	MInetBase::GetApiL(const TDesC8 &,TUint *)
	MInetBase::GetApiL(const TDesC8 &,TUint)

Member Functions Documentation

HookValue(const TUint32)

TUint32

HookValue

(

const TUint32

aId

)

const [pure virtual]

Gets the value associated with the specified key.

Return the current value associated with aId. If aId does not exist, ZERO is returned [=> there is no way to differentiate between non-existing value and a value that is explicitly set to zero. Implementation may interpret setting value to ZERO as request to delete the association, if it exists].

Parameters

const TUint32 aId

Key

SetHookValue(const TUint32, const TUint32)

TInt	SetHookValue	(	const TUint32	aId,
			const TUint32	aValue
		)	[pure virtual]

Sets a (key,value) pair.

If a setting already exists for the key, the value is just replaced.

Parameters

const TUint32 aId	Key
const TUint32 aValue	Value associated with the key