#include <u.h>#include <libc.h>#include <authsrv.h> int_asgetresp(int fd, Ticket *t, Authenticator *a, Authkey *k){	char buf[MAXTICKETLEN+MAXAUTHENTLEN], err[ERRMAX];	int n, m; 	memset(t, 0, sizeof(Ticket));	if(a != nil)		memset(a, 0, sizeof(Authenticator)); 	strcpy(err, "AS protocol botch");	errstr(err, ERRMAX); 	if(_asrdresp(fd, buf, 0) < 0)		return -1; 	for(n = 0; (m = convM2T(buf, n, t, k)) <= 0; n += m){		m = -m;		if(m <= n || m > sizeof(buf))			return -1;		m -= n;		if(readn(fd, buf+n, m) != m)			return -1;	} 	if(a != nil){		for(n = 0; (m = convM2A(buf, n, a, t)) <= 0; n += m){			m = -m;			if(m <= n || m > sizeof(buf))				return -1;			m -= n;			if(readn(fd, buf+n, m) != m)				return -1;		}	} 	errstr(err, ERRMAX); 	return 0;}