BpduCfg

class

(no description)

Usage diagram

The following diagram shows usage relationships between types. Unresolved types are missing from the diagram.

Inheritance diagram

The following diagram shows inheritance relationships for this type. Unresolved types are missing from the 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
chunkLength	b
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
tcaFlag	bool	Topology Change Acknowledgment flag
reserved	uint8_t	unused 6 bits of Flags
tcFlag	bool	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 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)
mutable	bool
complete	bool
correct	bool
properlyRepresented	bool
rawBin	string[]
rawHex	string[]
tags	RegionTagSet::cObjectRegionTag[]

Source code

class BpduCfg extends BpduBase
{
    chunkLength = B(35);
    protocolIdentifier = SPANNING_TREE_PROTOCOL;
    protocolVersionIdentifier = SPANNING_TREE;
    bpduType = BPDU_CFG;
                                              // flags: 1 byte
    bool tcaFlag;                             //   Topology Change Acknowledgment flag
    uint8_t reserved = 0;                     //   unused 6 bits of Flags
    bool tcFlag;                              //   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 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