Thanks again to everyone for all the help!
I did this (thanks Andrey):
ndb/cs
ip/ipconfig
ndb/dns -r
Then I took a look at /net/ipselftab and /net/iproute.
Then I pinged the gateway (thanks André) and got a response!
Then I did (thanks Federico)
hget http://google.com
and got some hieroglyphs. Then I did
http://www.gamefaqs.com/portable/ds/file/924897/46369
which is a fairly clean text file, to get something readable. It worked!