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1 #include <u.h>2 #include <libc.h>3 #include <ip.h>5 static char zea[6];7 int8 myetheraddr(uchar *to, char *dev)9 {10 Ipifc *ifclist, *ifc;12 ifclist = readipifc(nil, nil, -1);13 for(ifc=ifclist; ifc; ifc=ifc->next){14 if(dev && strcmp(ifc->dev, dev) != 0)15 continue;16 if(memcmp(zea, ifc->ether, 6) == 0)17 continue;18 memmove(to, ifc->ether, 6);19 freeipifc(ifclist);20 return 0;21 }22 freeipifc(ifclist);23 werrstr("no ethernet devices");24 return -1;25 }