Ieee80211MacHeader¶

Namespace: inet

class Ieee80211MacHeader

The common part of 802.11 frames.

NOTE: FCS value is not explicitly modeled, but it is included in the length. Frame control format fields not supported by this model are omitted: MoreFlag, PowerMgmt, MoreData, WEP, Order.

Usage diagram¶

Inheritance diagram¶

Extends¶

Name	Type	Description
FieldsChunk	class	(no description)

Known subclasses¶

Name	Type	Description
Ieee80211OneAddressHeader	class	Format of a 802.11 frame with address1 present, like ACK and CTS

Fields¶

Name	Type	Description
id	int
mutable	bool
complete	bool
correct	bool
properlyRepresented	bool
chunkLength	b
rawBin	string[]
rawHex	string[]
regionTags	SharingRegionTagSet::TagBaseRegionTag[]
chunkLength
type	Ieee80211FrameType	type and subtype
toDS	bool
fromDS	bool
moreFragments	bool
retry	bool
powerMgmt	bool	unused
moreData	bool	unused
protectedFrame	bool	unused
order	bool	unused
durationField	simtime_t	“duration” in the Duration/ID field (-1=no duration)
AID	short	“id” (Association ID) in the Duration/ID field (-1=no ID)
receiverAddress	MacAddress	aka address1 (RA)
MACArrive	simtime_t	FIXME remove it, technical data, used inside of MAC module

Properties¶

Name	Value	Description
beforeChange	handleChange()
descriptor	readonly
existingClass
packetData

Source code¶

//
// The common part of 802.11 frames.
//
// NOTE:
// FCS value is not explicitly modeled, but it is included in the length.
// Frame control format fields not supported by this model are omitted:
// MoreFlag, PowerMgmt, MoreData, WEP, Order.
//
class Ieee80211MacHeader extends FieldsChunk
{
    chunkLength = LENGTH_ACK - B(4);
    Ieee80211FrameType type; // type and subtype
    bool toDS;
    bool fromDS;
    bool moreFragments;
    bool retry;
    bool powerMgmt = false; // unused
    bool moreData = false; // unused
    bool protectedFrame = false; // unused
    bool order = false; // unused
    simtime_t durationField = -1; // "duration" in the Duration/ID field (-1=no duration)
    short AID = -1;          // "id" (Association ID) in the Duration/ID field (-1=no ID)
    MacAddress receiverAddress; // aka address1 (RA)
    simtime_t MACArrive;    // FIXME remove it, technical data, used inside of MAC module
}

File: src/inet/linklayer/ieee80211/mac/Ieee80211Frame.msg