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error = sooptcopyout(sopt, &optval,		error = sooptcopyout(sopt, &optval,
sizeof optval);		sizeof optval);
break;		break;

case IPV6_PATHMTU:		case IPV6_PATHMTU:
{		{
u_long pmtu = 0;		u_long pmtu = 0;
struct ip6_mtuinfo mtuinfo;		struct ip6_mtuinfo mtuinfo;
		struct in6_addr addr;

if (!(so->so_state & SS_ISCONNECTED))		if (!(so->so_state & SS_ISCONNECTED))
return (ENOTCONN);		return (ENOTCONN);
/*		/*
* XXX: we dot not consider the case of source		* XXX: we dot not consider the case of source
* routing, or optional information to specify		* routing, or optional information to specify
* the outgoing interface.		* the outgoing interface.
		* Copy faddr out of in6p to avoid holding lock
		* on inp during route lookup.
*/		*/
		INP_RLOCK(in6p);
		bcopy(&in6p->in6p_faddr, &addr, sizeof(addr));
		INP_RUNLOCK(in6p);
error = ip6_getpmtu_ctl(so->so_fibnum,		error = ip6_getpmtu_ctl(so->so_fibnum,
&in6p->in6p_faddr, &pmtu);		&addr, &pmtu);
if (error)		if (error)
break;		break;
if (pmtu > IPV6_MAXPACKET)		if (pmtu > IPV6_MAXPACKET)
pmtu = IPV6_MAXPACKET;		pmtu = IPV6_MAXPACKET;

bzero(&mtuinfo, sizeof(mtuinfo));		bzero(&mtuinfo, sizeof(mtuinfo));
mtuinfo.ip6m_mtu = (u_int32_t)pmtu;		mtuinfo.ip6m_mtu = (u_int32_t)pmtu;
optdata = (void *)&mtuinfo;		optdata = (void *)&mtuinfo;
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