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| author | user <user@clank> | 2026-07-17 12:15:09 +0200 |
|---|---|---|
| committer | user <user@clank> | 2026-07-17 12:15:09 +0200 |
| commit | d102366e6808f74ef98044374d744e453efdbefa (patch) | |
| tree | 6f35b79e4e0fb01c432262fbb5254f39331717ad /include/gbos.inc | |
| parent | net: real routed IP via SLIP<->TUN bridge (you can *ping* a Game Boy) (diff) | |
| download | gbos-d102366e6808f74ef98044374d744e453efdbefa.tar.gz gbos-d102366e6808f74ef98044374d744e453efdbefa.tar.xz gbos-d102366e6808f74ef98044374d744e453efdbefa.zip | |
net: ping - GB-originated ICMP echo (a Game Boy pings the real internet)
New `ping [A.B.C.D]` program (PROG_PING=27, bank 29): builds and sends ICMP
echo requests from 10.0.0.2, then reads replies off the link port. It keeps
reading SLIP frames until it finds *our* echo reply, skipping the IGMP/mDNS/
SSDP multicast noise that shares 10.0.0.0/24. Reply wait uses a generous
srecv_nb spin budget since the emulator runs uncapped (no timer syscall yet).
Verified over the tunbridge (with NAT):
/# ping 10.0.0.1 -> 4/4 received, ttl=64 (the SLIP peer/host)
/# ping 1.1.1.1 -> 4/4 received, ttl=56 (Cloudflare, real net!)
ttl=56 is a real internet round trip (64 minus the hops). Combined with the
host being able to ping the GB, the Game Boy is now a full two-way ICMP host.
Diffstat (limited to 'include/gbos.inc')
| -rw-r--r-- | include/gbos.inc | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/gbos.inc b/include/gbos.inc index 2de2a84..a80841c 100644 --- a/include/gbos.inc +++ b/include/gbos.inc @@ -219,5 +219,6 @@ DEF PROG_NECHO EQU 23 DEF PROG_WGET EQU 24 DEF PROG_CHAT EQU 25 DEF PROG_NETD EQU 26 +DEF PROG_PING EQU 27 ENDC |