Re: getHardwareAddress

Subject: Re: getHardwareAddress

From: Shaun Wexler <email@hidden>

Date: Mon, 14 May 2007 22:44:32 -0700

Delivered-to: email@hidden

On May 14, 2007, at 9:31 PM, sugumaran Narayanan wrote:

In my PCCard driver, which I have written based on a PCI driver, calling the attachinterface() calls the gethardwareaddress(). In my device the mac address is brought to a hw register only when a reset occurs and when the hardware interrupts are enabled. so when the gethardwareaddress() gets called, I dont have the right mac address to return. Is there any way to return the right mac addres to the upper layers, later, when the device starts generating interrupts.

You can return kIOReturnNotReady from getHardwareAddress(). If you call attachInterface(&interface, false) then the service will be initialized but not registered. After you have prepared the hardware, call publishProperties() which will get the MAC address, and then interface->registerService(); This will delay the appearance of your interface to the system until the hardware is ready. You can also return 0.0.0.0 if no address is available, and then manually set the address property in your enable() function using setProperty(kIOMACAddress, (void *)&addr, kIOEthernetAddressSize). You can force a refresh of the MAC address by calling detachFromDataLinkLayer and then attachToDataLinkLayer on the interface.

Shaun Wexler

MacFOH

http://www.macfoh.com

Ethernet \'ethur`net\, n. something used to catch the etherbunny.

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References:

>getHardwareAddress (From: "sugumaran Narayanan" <email@hidden>)