given: HTTP payload
useful stuf
https://datatracker.ietf.org/doc/html/rfc4291
https://datatracker.ietf.org/doc/html/rfc2460
sockets:
To allow for many processes within a single Host to use TCP
communication facilities simultaneously, the TCP provides a set of
addresses or ports within each host. Concatenated with the network
and host addresses from the internet communication layer, this forms
a socket. A pair of sockets uniquely identifies each connection.
That is, a socket may be simultaneously used in multiple
connections.tcp interface:
open, close
send, receive
status
implement TCP
how to go from TCP → IP
implement IP
implement morriscode driver that sends IP packets to raspberry pi
milestone 1
establish TCP handshake /w mock server on same machine
send dummy payload
sequence #s and ack #s
client → server
SYN packet
sequence # of 0. acknowledgement # of 0
server → client:
SYNACK response packet
sequence # of 0. acknowledgement # of 1
client → server:
ACK packet
seq # of 1, ack # of 1
packets
IPV6: 320bits
payload
need to grok sockets
→ hack around on sockets a bit, see how they work… break down data into packets
→ implement my own socket interface… should break stuff down via tcp into ip packets
milestone 2:
TCP handshake across raspberry pi
milestone 3:
mod payload to be cat
milestone 4+ http server →
—http to tcp:
one-to-one/one-to-many?
where do sockets come in?
next time!!!
unknown
- need speaker + mic for 2 PI to send/receive data
- how do we use morse code from 2 diff devices at same time without interference?
audio waves vs radio waves
next time on livestream
what HW to buy to build wifi adaptor
- raspberry pi
- payload: >1000 1’s or 0’s
- short range: 10 meters
output: what parts to order. spec of system. expected bandwidth / latency / reliability for tcp packets