Namespace inet

BpduCfg

class

(no description)

Extends

Name	Type	Description
BpduBase	(unknown -- not in documented files)

Fields

Name	Type	Description
chunkLength
protocolIdentifier
protocolVersionIdentifier
bpduType		flags: 1 byte
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)

Packet operations (observed)

action	module
insertAtBack	Rstp, Stp
peekAtFront	Rstp

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