[Csci551-talk] prefix checking, data packet format

[ajay salpekar]

1) It's unclear to me what's meant by "You WILL need to consider prefixes, 
though"Does this simply mean that we'd need to hunt for a match for the destn 
IP in the concerned router's table and just put out a distance for it, or does 
it mean that we can have config input lines like the following : 

r 1 10.1.0.1 10.1.0.2 
r 1 11.X.X.X 10.1.0.3

router 1's own IP here is 10.1.0.0. So does "consider prefixes" mean that I 
will need to check if the source IP is definitely within the subnet address 
range represented by the router 1? Or will such inputs never occur?



2) It seems that we'd need to add a few fields to the LSA packet if we're 
going to use it to shunt data between routers - origin source ip (h1) and 
destn source ip (h2), plus whatever else might come up later on. We use the 
same length for marshalling the IP fields as we used for the Project A IP 
fields do we? And if I need to pass other fields in addition (supposing I need 
to), is it up to me to decide their field lengths?