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/*
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 * Standard usb ethernet communications device.
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 */
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#include <u.h>
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#include <libc.h>
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#include <fcall.h>
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#include <thread.h>
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#include "usb.h"
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#include "usbfs.h"
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#include "ether.h"
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static int
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okclass(Iface *iface)
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{
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	return Class(iface->csp) == Clcomms && Subclass(iface->csp) == Scether;
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}
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static int
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getmac(Ether *ether)
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{
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	int i;
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	Usbdev *ud;
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	uchar *b;
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	Desc *dd;
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	char *mac;
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	ud = ether->dev->usb;
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	for(i = 0; i < nelem(ud->ddesc); i++)
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		if((dd = ud->ddesc[i]) != nil && okclass(dd->iface)){
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			b = (uchar*)&dd->data;
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			if(b[1] == Dfunction && b[2] == Fnether){
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				mac = loaddevstr(ether->dev, b[3]);
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				if(mac != nil && strlen(mac) != 12){
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					free(mac);
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					mac = nil;
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				}
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				if(mac != nil){
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					parseaddr(ether->addr, mac);
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					free(mac);
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					return 0;
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				}
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			}
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		}
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	return -1;
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}
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int
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cdcreset(Ether *ether)
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{
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	/*
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	 * Assume that all communication devices are going to
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	 * be std. ethernet communication devices. Specific controllers
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	 * must have been probed first.
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	 * NB: This ignores unions.
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	 */
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	if(ether->dev->usb->class == Clcomms)
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		return getmac(ether);
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	return -1;
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}