/* 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;
}
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;
}