コード例 #1
0
ファイル: if_utun.c プロジェクト: Bitesher/xnu
/* Network Interface functions */
static errno_t
utun_output(
			   ifnet_t	interface,
			   mbuf_t	data)
{
	struct utun_pcb	*pcb = ifnet_softc(interface);
	errno_t			result;
	
	if (m_pktlen(data) >= 4) {
		bpf_tap_out(pcb->utun_ifp, DLT_NULL, data, 0, 0);
	}
	
	if (pcb->utun_flags & UTUN_FLAGS_NO_OUTPUT) {
		/* flush data */
		mbuf_freem(data);
		return 0;
	}

	// otherwise, fall thru to ctl_enqueumbuf
	if (pcb->utun_ctlref) {
		int	length;

		// only pass packets to utun-crypto if crypto is enabled and 'suspend data traffic' is not.
		if ((pcb->utun_flags & (UTUN_FLAGS_CRYPTO | UTUN_FLAGS_CRYPTO_STOP_DATA_TRAFFIC)) == UTUN_FLAGS_CRYPTO) {
			if (utun_pkt_crypto_output(pcb, &data) == 0) {
				return 0;
			}
		}

		/*
		 * The ABI requires the protocol in network byte order
		 */
		if (m_pktlen(data) >= 4)
			*(u_int32_t *)mbuf_data(data) = htonl(*(u_int32_t *)mbuf_data(data));

		length = mbuf_pkthdr_len(data);
		result = ctl_enqueuembuf(pcb->utun_ctlref, pcb->utun_unit, data, CTL_DATA_EOR);
		if (result != 0) {
			mbuf_freem(data);
			printf("utun_output - ctl_enqueuembuf failed: %d\n", result);

			ifnet_stat_increment_out(interface, 0, 0, 1);
		}
		else {
			if (!pcb->utun_ext_ifdata_stats)
				ifnet_stat_increment_out(interface, 1, length, 0);
		}
	}
	else 
		mbuf_freem(data);
	
	return 0;
}
コード例 #2
0
ファイル: if_utun.c プロジェクト: onlynone/xnu
static errno_t
utun_output(ifnet_t	interface,
			mbuf_t data)
{
	struct utun_pcb	*pcb = ifnet_softc(interface);
	errno_t			result;

	VERIFY(interface == pcb->utun_ifp);
	
	if (m_pktlen(data) >= (int32_t)UTUN_HEADER_SIZE(pcb)) {
		bpf_tap_out(pcb->utun_ifp, DLT_NULL, data, 0, 0);
	}
	
	if (pcb->utun_flags & UTUN_FLAGS_NO_OUTPUT) {
		/* flush data */
		mbuf_freem(data);
		return 0;
	}

	// otherwise, fall thru to ctl_enqueumbuf
	if (pcb->utun_ctlref) {
		int	length;

		/*
		 * The ABI requires the protocol in network byte order
		 */
		if (m_pktlen(data) >= (int32_t)UTUN_HEADER_SIZE(pcb)) {
			*(u_int32_t *)mbuf_data(data) = htonl(*(u_int32_t *)mbuf_data(data));
		}

		length = mbuf_pkthdr_len(data);
		result = ctl_enqueuembuf(pcb->utun_ctlref, pcb->utun_unit, data, CTL_DATA_EOR);
		if (result != 0) {
			mbuf_freem(data);
			printf("utun_output - ctl_enqueuembuf failed: %d\n", result);

			ifnet_stat_increment_out(interface, 0, 0, 1);
		}
		else {
			if (!pcb->utun_ext_ifdata_stats)
				ifnet_stat_increment_out(interface, 1, length, 0);
		}
	}
	else 
		mbuf_freem(data);
	
	return 0;
}