#include <u.h>#include <libc.h> intparseether(uchar *to, char *from){	char nip[4];	char *p;	int i; 	p = from;	for(i = 0; i < 6; i++){		if(*p == 0)			return -1;		nip[0] = *p++;		if(*p == 0)			return -1;		nip[1] = *p++;		nip[2] = 0;		to[i] = strtoul(nip, 0, 16);		if(*p == ':')			p++;	}	return 0;}