Subversion Repositories planix.SVN

/*
 * Standard usb ethernet communications device.
 */
#include <u.h>
#include <libc.h>
#include <fcall.h>
#include <thread.h>
#include "usb.h"
#include "usbfs.h"
#include "ether.h"

static int
okclass(Iface *iface)
{
        return Class(iface->csp) == Clcomms && Subclass(iface->csp) == Scether;
}

static int
getmac(Ether *ether)
{
        int i;
        Usbdev *ud;
        uchar *b;
        Desc *dd;
        char *mac;

        ud = ether->dev->usb;

        for(i = 0; i < nelem(ud->ddesc); i++)
                if((dd = ud->ddesc[i]) != nil && okclass(dd->iface)){
                        b = (uchar*)&dd->data;
                        if(b[1] == Dfunction && b[2] == Fnether){
                                mac = loaddevstr(ether->dev, b[3]);
                                if(mac != nil && strlen(mac) != 12){
                                        free(mac);
                                        mac = nil;
                                }
                                if(mac != nil){
                                        parseaddr(ether->addr, mac);
                                        free(mac);
                                        return 0;
                                }
                        }
                }
        return -1;
}

int
cdcreset(Ether *ether)
{
        /*
         * Assume that all communication devices are going to
         * be std. ethernet communication devices. Specific controllers
         * must have been probed first.
         * NB: This ignores unions.
         */
        if(ether->dev->usb->class == Clcomms)
                return getmac(ether);
        return -1;
}