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The link port is both the console-input fallback and the network. At the shell
prompt the host's multicast (mDNS/LLMNR/IGMP) was fed to the serial and KGetc
read those packet bytes as console input -> garbage in the shell, OSK unusable.
Two-part fix:
- KGetc now skips SLIP frames (0xC0-delimited) on the serial console path, so
inbound packets never surface as console input. Plain injected bytes (the
headless tunbridge command path) still pass through. New wConInSkip flag.
- netboot/tunbridge only forward IP packets destined to 10.0.0.2 (drop the
multicast noise at the bridge).
Verified: GB sits at a clean "/#" prompt while all packets (noise included) are
forwarded; being-pinged (3/3) and wget still work. On the emulator, the OSK is
SELECT=space, START=enter, A=z, B=x, d-pad=WASD/arrows.
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Brings up gbtun0 (10.0.0.1/24) + NAT, then launches sl0pboy with your own args
and the link port bridged to the TUN over a unix socket (the emulator's new
--serial-sock). Unlike headless tunbridge, the LCD + on-screen keyboard stay
live, so it's a fully interactive networked Game Boy: the OSK is the console,
the link port is the network.
sudo tools/netboot --sixel --chrome gbos.gb
# on the GB: SELECT for the OSK, then type: wget example.com / ping 1.1.1.1
GB is 10.0.0.2, host is 10.0.0.1. Requires /dev/net/tun + root. Ctrl-C or quit
the emulator to tear down. tunbridge stays for headless scripted runs.
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