static int up_to_network(char *packet, int length, int arrived_on)
{
NL_PACKET *p;
CnetAddr addr;
p = (NL_PACKET *)packet;
if(p->dest == nodeinfo.address) { /* THIS PACKET IS FOR ME */
if(p->kind == NL_DATA && p->seqno == packetexpected(p->src)) {
length = p->length;
/* modified to go up to my transport layer instead */
/* of application i -- Sumit*/
up_to_transport(p->msg, &length, p->src);
inc_packetexpected(p->src);
NL_stats(p->src, p->hopstaken, arrived_on, 0);
addr = p->src; /* transform NL_DATA into NL_ACK */
p->src = p->dest;
p->dest = addr;
p->kind = NL_ACK;
p->hopsleft = maxhops(p->dest);
p->hopstaken = 1;
p->length = 0;
selective_flood(packet, PACKET_HEADER_SIZE, whichlink(p->dest) );
}
else if(p->kind == NL_ACK && p->seqno == ackexpected(p->src)) {
CnetInt64 took;
/*move this to transport layeri -- Sumit*/
/*CNET_enable_application(p->src);*/
inc_ackexpected(p->src);
int64_SUB(took, nodeinfo.time_in_usec, p->timesent);
NL_stats(p->src, p->hopstaken, arrived_on, took);
}
}
else { /* THIS PACKET IS FOR SOMEONE ELSE */
if(--p->hopsleft > 0) { /* send it back out again */
p->hopstaken++;
NL_stats(p->src, p->hopstaken, arrived_on, 0);
selective_flood(packet, length,
whichlink(p->dest) & ~(1<<arrived_on));
}
}
return(0);
}
//-----------------------------------------------------------------------------
// detect a link for outgoing message
int get_next_link_for_dest(CnetAddr destaddr) {
// address not exists yet
if (route_exists(destaddr) == FALSE)
return -1;
else
return whichlink(destaddr);
}
static void down_to_network(char* msg, int length, CnetAddr dest)
{
/* modified to take stuff form my transport layer
instead of application layer -- Sumit*/
NL_PACKET p;
p.length = length;
memcpy(&(p.msg[0]),msg,length);
p.dest = dest;
p.src = nodeinfo.address;
p.kind = NL_DATA;
p.hopsleft = maxhops(p.dest);
p.hopstaken = 1;
p.timesent = nodeinfo.time_in_usec;
p.seqno = nextpackettosend(p.dest);
selective_flood((char *)&p, PACKET_SIZE(p), whichlink(p.dest));
}
