/*
* TODO: Can we do these without super user permissions?
*/
void* fromTapDev(void *arg)
{
interface_t *iface = (interface_t *) arg;
interface_array_t *iarr = (interface_array_t *)iface->iarray;
uchar bcast_mac[] = MAC_BCAST_ADDR;
gpacket_t *in_pkt;
int pktsize;
pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL); // die as soon as cancelled
while (1)
{
verbose(2, "[fromTapDev]:: Receiving a packet ...");
if ((in_pkt = (gpacket_t *)malloc(sizeof(gpacket_t))) == NULL)
{
fatal("[fromTapDev]:: unable to allocate memory for packet.. ");
return NULL;
}
bzero(in_pkt, sizeof(gpacket_t));
pktsize = tap_recvfrom(iface->vpl_data, &(in_pkt->data), sizeof(pkt_data_t));
pthread_testcancel();
// check whether the incoming packet is a layer 2 broadcast or
// meant for this node... otherwise should be thrown..
// TODO: fix for promiscuous mode packet snooping.
if ((COMPARE_MAC(in_pkt->data.header.dst, iface->mac_addr) != 0) &&
(COMPARE_MAC(in_pkt->data.header.dst, bcast_mac) != 0))
{
verbose(1, "[fromTapDev]:: Packet[%d] dropped .. not for this router!? ", pktsize);
free(in_pkt);
continue;
}
// copy fields into the message from the packet..
in_pkt->frame.src_interface = iface->interface_id;
COPY_MAC(in_pkt->frame.src_hw_addr, iface->mac_addr);
COPY_IP(in_pkt->frame.src_ip_addr, iface->ip_addr);
// check for filtering.. if the it should be filtered.. then drop
if (filteredPacket(filter, in_pkt))
{
verbose(2, "[fromTapDev]:: Packet filtered..!");
free(in_pkt);
continue; // skip the rest of the loop
}
verbose(2, "[fromTapDev]:: Packet is sent for enqueuing..");
weightedFairQueuer(pcore, in_pkt, sizeof(gpacket_t));
}
}
/*
* TODO: Can we do these without super user permissions?
*/
void* fromTapDev(void *arg)
{
interface_t *iface = (interface_t *) arg;
interface_array_t *iarr = (interface_array_t *)iface->iarray;
uchar bcast_mac[] = MAC_BCAST_ADDR;
char *pkttag;
gpacket_t *in_pkt;
int pktsize;
pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL); // die as soon as cancelled
while (1)
{
verbose(2, "[fromTapDev]:: Receiving a packet ...");
if ((in_pkt = (gpacket_t *)malloc(sizeof(gpacket_t))) == NULL)
{
fatal("[fromTapDev]:: unable to allocate memory for packet.. ");
return NULL;
}
bzero(in_pkt, sizeof(gpacket_t));
pktsize = tap_recvfrom(iface->vpl_data, &(in_pkt->data), sizeof(pkt_data_t));
pthread_testcancel();
// check whether the incoming packet is a layer 2 broadcast or
// meant for this node... otherwise should be thrown..
// TODO: fix for promiscuous mode packet snooping.
if ((COMPARE_MAC(in_pkt->data.header.dst, iface->mac_addr) != 0) &&
(COMPARE_MAC(in_pkt->data.header.dst, bcast_mac) != 0))
{
verbose(1, "[fromTapDev]:: Packet[%d] dropped .. not for this router!? ", pktsize);
free(in_pkt);
continue;
}
// copy fields into the message from the packet..
in_pkt->frame.src_interface = iface->interface_id;
COPY_MAC(in_pkt->frame.src_hw_addr, iface->mac_addr);
COPY_IP(in_pkt->frame.src_ip_addr, iface->ip_addr);
// check for filtering.. if the it should be filtered.. then drop
if (filteredPacket(filter, in_pkt))
{
verbose(2, "[fromTapDev]:: Packet filtered..!");
free(in_pkt);
continue; // skip the rest of the loop
}
// invoke the packet core classifier to get the packet tag
// at the very minimum, we get the "default" tag!
verbose(2, "[fromTapDev]:: Calling the classifier..");
pkttag = tagPacket(pcore, in_pkt);
verbose(2, "[fromTapDev]:: Packet tagged as %s ", pkttag);
if (!strcmp(rconfig.schedpolicy, "rr"))
roundRobinQueuer(pcore, in_pkt, sizeof(gpacket_t), pkttag);
else if (!strcmp(rconfig.schedpolicy, "wfq"))
weightedFairQueuer(pcore, in_pkt, sizeof(gpacket_t), pkttag);
else
fatal("[fromTapDev]:: Unknown queuer specification! %s \n", rconfig.schedpolicy);
}
}
