Add new `knock' protocol.

[tripe] / wireshark / capture-session

#! /bin/sh -e
###
### A simple script for capturing TrIPE sessions, for testing the Wireshark
### dissector.

ty=${1?ty} param=${2-$ty}
tripe=${TRIPE-tripe}
rm -rf captmp
mkdir captmp
cd captmp

cp ../keyring .
for i in alice bob; do
  key add -eforever -a$ty -t$i -pparam-$param tripe
done
cp keyring keyring.pub

for i in alice bob; do
  mkfifo $i.in $i.out
  TRIPE_SLIPIF=/usr/bin/tripe-uslip \
    $tripe -d. -as.$i -F -nslip -t$i -p0 <$i.in >$i.out 2>$i.err&
done
exec 3>alice.in 4<alice.out; alice_in=3 alice_out=4
exec 5>bob.in 6<bob.out; bob_in=5 bob_out=6

docmd () {
  who=$1; shift
  eval in=\$${who}_in out=\$${who}_out
  echo "$*" >&$in
  while read tag tail; do
    : "$tag $tail"
    case $tag in
      INFO) echo $tail ;;
      FAIL) echo >&2 "command \`$*' failed: $tail"; exit 10 ;;
      OK) break ;;
    esac
  done <&$out
}

await () {
  who=$1
  eval out=\$${who}_out
  while read tag kind rest; do
    : "$tag $kind $rest"
    case $tag,$kind in
      NOTE,KXDONE) break ;;
    esac
  done <&$out
}

docmd alice watch n-tw
docmd bob watch n-tw

p_alice=$(docmd alice port)
p_bob=$(docmd bob port)

tshark -ilo -f"udp port $p_alice or udp port $p_bob" \
       -w../cap.$param& shark=$!
pause

docmd alice add -cork bob 127.0.0.1 $p_bob
c=$(docmd bob getchal)
docmd alice greet bob $c
docmd bob add alice 127.0.0.1 $p_alice
await alice& walice=$!
await bob& wbob=$!
wait $walice
wait $wbob

echo ping | tripe-uslip -p bob
x=$(tripe-uslip -g alice)

pause

exec 3>&- 4>&- 5>&- 6>&-
kill $shark
wait