I was wonder what I am doing wrong with the four byte host address in the query hit packet.

I've written a client now I am just ironing the bugs out. I've set up a test network on my computer. My program connect to Gnucleus.

When send a query hit with the 127.0.0.1 (7F001 or 520193) I get some something like 16.0.127.0. My question is how do you encode the host address? is suppose to be 127001?

Looks like you have the bytes in the wrong order.

127.0.0.1 = 16777343 = 0x0100007F

I thought the Ips were IPv4 and the other stuffs lil' Endian?

Thanks that seems to have solved my bad packet problem.
The Gnutella specs are a little misleading. The show it as:

byte 0 byte 1 byte 2 byte3

and the first part of their example address (208 i believe) under the byte 0. Anyway thanks for clearing that up.

String to IP: inet_addr()
IP to InAddr: inet_ntoa()

Does that help?