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feat(packages): ludic.net - a party over UDP: peers, reliable ordered delivery, the hello's frame and the host's pids, join codes, room codes through a matchmaker with STUN, punching and a relay, the MTU cap and the wire codec; messages in on an inbox, the session's end and a silent guest as facts

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Orkun ÇAKILKAYA 2026-09-25 07:45:26 +03:00
parent 411206e45a
commit 12172d7b75
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packages/ludic.net/punch.ludic Normal file
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# punch.ludic - the host sends a few packets to each new guest's outside address, so its router
# expects the guest, while the guest's hello goes the other way: both routers have seen traffic
# go out, so the replies come in
var net__seen: []string = null # guests already punched for
var net__punch_ip: words = null
var net__punch_port: words = null
var net__punch_left: words = null
var net__punch_t: float = 0.0
var net__punch_b: []byte = null # the punch itself, "MP" and two zeros, made once
function net__new_guest(pub: string, local: string) -> void {
let key = `{pub}|{local}`
if net__seen == null { net__seen = new []string }
for i in 0 .. len(net__seen) { if net__seen[i] == key { return } }
push(net__seen, key)
net__log(`room {net__room}: a guest at {pub} / {local}`)
if len(pub) > 0 and net_parse_code(pub) { net__punch_add(net__code_ip, net__code_port) }
if net_parse_code(local) { net__punch_add(net__code_ip, net__code_port) }
}
function net__punch_add(ip: int, port: int) -> void {
if net__punch_ip == null {
net__punch_ip = words(16)
net__punch_port = words(16)
net__punch_left = words(16)
for k in 0 .. 16 { net__punch_left[k] = 0 }
}
for k in 0 .. 16 {
if net__punch_left[k] > 0 { continue }
net__punch_ip[k] = ip
net__punch_port[k] = port
net__punch_left[k] = 10
return
}
}
# twice a second while a guest is new: a packet the guest's side ignores, which is the point
function net__punch_tick(dt: float) -> void {
if net__punch_ip == null { return }
net__punch_t = net__punch_t - dt
if net__punch_t > 0.0 { return }
net__punch_t = 0.5
if net__punch_b == null {
net__punch_b = buffer(4)
nb_put8(net__punch_b, 0, 'M')
nb_put8(net__punch_b, 1, 'P')
}
for k in 0 .. 16 {
if net__punch_left[k] <= 0 { continue }
NetSocket.send(net__sock, net__punch_ip[k], net__punch_port[k], net__punch_b, 4)
net__punch_left[k] -= 1
}
}
function net__punch_clear() -> void {
if net__punch_left != null { for k in 0 .. 16 { net__punch_left[k] = 0 } }
}