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	#ifdef RSS			#ifdef RSS
	case IPV6_RECVRSSBUCKETID:			case IPV6_RECVRSSBUCKETID:
	OPTSET2(INP_RECVRSSBUCKETID, optval);			OPTSET2(INP_RECVRSSBUCKETID, optval);
	break;			break;
	#endif			#endif

	case IPV6_V6ONLY:			case IPV6_V6ONLY:
	/*			INP_WLOCK(inp);
	* make setsockopt(IPV6_V6ONLY)
	* available only prior to bind(2).
	* see ipng mailing list, Jun 22 2001.
	*/
	if (inp->inp_lport \|\|			if (inp->inp_lport \|\|
	!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {			!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
				/*
				* The socket is already bound.
				*/
				INP_WUNLOCK(inp);
	error = EINVAL;			error = EINVAL;
	break;			break;
	}			}
	OPTSET(IN6P_IPV6_V6ONLY);			if (optval) {
	if (optval)			inp->inp_flags \|= IN6P_IPV6_V6ONLY;
	inp->inp_vflag &= ~INP_IPV4;			inp->inp_vflag &= ~INP_IPV4;
	else			} else {
				inp->inp_flags &= ~IN6P_IPV6_V6ONLY;
	inp->inp_vflag \|= INP_IPV4;			inp->inp_vflag \|= INP_IPV4;
				}
				INP_WUNLOCK(inp);
	break;			break;
	case IPV6_RECVTCLASS:			case IPV6_RECVTCLASS:
	/* cannot mix with RFC2292 XXX */			/* cannot mix with RFC2292 XXX */
	OPTSET2292_EXCLUSIVE(IN6P_TCLASS);			OPTSET2292_EXCLUSIVE(IN6P_TCLASS);
	break;			break;
	case IPV6_AUTOFLOWLABEL:			case IPV6_AUTOFLOWLABEL:
	OPTSET(IN6P_AUTOFLOWLABEL);			OPTSET(IN6P_AUTOFLOWLABEL);
	break;			break;
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