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Contains the I/O base address.
Contains a tag value that identifies 3Com 3C5x9 devices on an ISA bus.
Contains a value that indicates whether the user has ejected the PCMCIA card.
Contains a value that indicates whether the user has reloaded the PCMCIA card.
Contains a value that indicates whether the card is a PCMCIA card.
Declares a pointer to the card_info data structure and calls it cinfop. The card_info data structure contains information that is necessary to communicate with the kernel PCMCIA subsystem.
3.10 Defining the Broadcast Flag
The broadcast flag in the if_el driver’s el_softc data structure indicates whether the device should receive broadcast traffic. This flag is specific to the if_el driver and, therefore, is optional in most network device drivers. The following code shows the declaration of the broadcast flag in the if_el device driver’s el_softc data structure:
int is_broadcast;
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Contains a boolean value. If true, the broadcast address flag is set.
3.11 Defining the Debug Flag
The debug flag in a network driver’s softc data structure indicates whether debug mode is on. The following code shows the declaration of the debug flag in the if_el device driver’s el_softc data structure. The debug flag is optional.
int debug;
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Contains the status of the debug flag. If the if_flags member of the ifnet data structure pointer is set to IFF_DEBUG, debug is on. Otherwise, debug is off.
3.12 Defining Interrupt and Timeout Statistics
The interrupt and timeout statistics in the if_el driver’s el_softc data structure consists of information about timeout and interrupt events.
