BpduCfg¶

Namespace: inet

class BpduCfg

(no description)

Usage diagram¶

Inheritance diagram¶

Extends¶

Name	Type	Description
BpduBase	class	Represents a BPDU (Bridge PDU) used by the STP and RSTP protocols, as defined in the 802.1D-1998 specification.

Fields¶

Name	Type	Description
id	int
mutable	bool
complete	bool
correct	bool
properlyRepresented	bool
chunkLength	b
rawBin	string[]
rawHex	string[]
regionTags	SharingRegionTagSet::TagBaseRegionTag[]
protocolIdentifier	BpduProtocolIdentifier	2 bytes, 0 for STP, 1 for RSTP (TODO use them)
protocolVersionIdentifier	BpduProtocolVersionIdentifier	1 byte, version ID, currently 0, // 3:MultipleSpanningTree
bpduType	BpduType	1 byte, 0 for Configuration BPDU, 1 for Topology Change Notification BPDU
chunkLength
protocolIdentifier
protocolVersionIdentifier
bpduType		flags: 1 byte
tcaFlag	bool	bit 7: Topology Change Acknowledgment flag
agreementFlag	bool	bit 6: Agreement flag (RSTP)
proposalFlag	bool	bit 1: Proposal flag (RSTP)
tcFlag	bool	bit 0: Topology Change flag
rootPriority	uint16_t	2 bytes, priority of the tree root (part of Root Identifier)
rootAddress	MacAddress	6 bytes, address of the tree root (part of Root Identifier)
rootPathCost	uint32_t	4 bytes, cost to the root
bridgePriority	uint16_t	2 bytes, priority of sender bridge (part of Bridge Identifier)
bridgeAddress	MacAddress	6 bytes, address of sender bridge (part of Bridge Identifier)
portPriority	unsigned int	1 byte, priority of sender port (part of Port Identifier)
portNum	unsigned int	1 byte, port number (ethg[] gate index) of sender port (part of Port Identifier) (or 4 bit priority (shifted with 4 bit) and 12 bit portnum (in 802.1D-2004))
messageAge	simtime_t	2 bytes, Message Age (in 256ths of a second)
maxAge	simtime_t	2 bytes, maximum lifetime of the BPDU (in 256ths of a second)
helloTime	simtime_t	2 bytes, Hello Time (Hello Interval) of the sender bridge (in 256ths of a second)
forwardDelay	simtime_t	2 bytes, Forward Delay timer of the sender bridge (in 256ths of a second)

Properties¶

Name	Value	Description
beforeChange	handleChange()
descriptor	readonly
existingClass
packetData

Source code¶

class BpduCfg extends BpduBase
{
    chunkLength = B(35);
    protocolIdentifier = SPANNING_TREE_PROTOCOL;
    protocolVersionIdentifier = SPANNING_TREE;
    bpduType = BPDU_CFG;
                                              // flags: 1 byte
    bool tcaFlag;                             //   bit 7: Topology Change Acknowledgment flag
    bool agreementFlag;                       //   bit 6: Agreement flag (RSTP)
    bool proposalFlag;                        //   bit 1: Proposal flag (RSTP)
    bool tcFlag;                              //   bit 0: Topology Change flag

    uint16_t rootPriority;                    // 2 bytes, priority of the tree root (part of Root Identifier)
    MacAddress rootAddress;                   // 6 bytes, address of the tree root (part of Root Identifier)
    uint32_t rootPathCost;                    // 4 bytes, cost to the root

    uint16_t bridgePriority;                  // 2 bytes, priority of sender bridge (part of Bridge Identifier)
    MacAddress bridgeAddress;                 // 6 bytes, address of sender bridge (part of Bridge Identifier)

    unsigned int portPriority;                // 1 byte, priority of sender port (part of Port Identifier)
    unsigned int portNum;                     // 1 byte, port number (ethg[] gate index) of sender port (part of Port Identifier)
                                              // (or 4 bit priority (shifted with 4 bit) and 12 bit portnum (in 802.1D-2004))

    simtime_t messageAge;                     // 2 bytes, Message Age (in 256ths of a second)
    simtime_t maxAge;                         // 2 bytes, maximum lifetime of the BPDU (in 256ths of a second)
    simtime_t helloTime;                      // 2 bytes, Hello Time (Hello Interval) of the sender bridge (in 256ths of a second)
    simtime_t forwardDelay;                   // 2 bytes, Forward Delay timer of the sender bridge (in 256ths of a second)
}

File: src/inet/linklayer/ieee8021d/common/Ieee8021dBpdu.msg