Hello all:
Recently i look through the routing.cc and come across a problem .
Anyone who knows something , please tell me, thank you very much.
In my opinion, the routing.cc should offer the function like this:
Given the Routeid 'id' which defined in routing.hh, and calculates the path
between source datapath and destination datapath which defined in struct
'Routeid', then accroding to this calculated path, encapsulate to openflow
message(conbtroller/switch message) for each datapath on the path , send to
openflow switchs and write into flow table entry.
But i am not sure which function(s) offer(s) the function of calculating
path.Maybe it is get_route() function defined in routing.cc, here is the codes:
bool
Routing_module::get_route(const RouteId& id, RoutePtr& route) const
{
RouteMap::const_iterator rte = shortest.find(id); // return a const
element reference to this key 'id' in hash_map //
if (rte == shortest.end()) {
if (id.src == id.dst) {
route.reset(new Route());
route->id = id;
return true;
}
return false;
}
route = rte->second;
return true;
}
Does the element refer to the key "id" in hash_map contain the path, which i
accroding to this line 'route = rte->second'. Is it right? If you know,
please help me, thank you very much again~
Best Wishes
Wang
Jian
Wednesday,
Junuary 4, 2012
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