| Commit message (Collapse) | Author | Age | Files | Lines |
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Link-drop investigation fallout - every drop looked identical because
the hub discarded all the evidence:
- gb_reader logs *how* a GB left (clean eof vs the exception) with
timestamps on join/leave, for correlating against SSH/terminal events.
- Spawn mode keeps each emulator's stderr in /tmp/gbhub_<n>.err instead
of devnull - postmortems get the emulator's side of the story.
- A second gbhub exits with a clear 'already running?' message instead
of an ioctl traceback (and can't damage the live hub's NAT/socket).
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gbhub gains a --daemon mode: instead of spawning headless emulators, it just
runs the switch/router/DHCP and accepts link connections, handing each a lease
from a pool (10.0.0.2..) and freeing it on disconnect. The link socket is made
world-connectable so unprivileged emulators can join.
gbjoin (no root) launches a *windowed* Game Boy and plugs its link into the
running hub, with its own ROM copy so battery saves don't clash. So you get real
interactive Game Boys on one network:
term 1: sudo tools/gbhub --daemon
term 2: tools/gbjoin # windowed GB -> 10.0.0.2
term 3: tools/gbjoin # windowed GB -> 10.0.0.3
(on each: SELECT for the OSK, then e.g. ping 10.0.0.3)
Verified two GBs join the daemon and get distinct leases; routing is the same
code path as the (already-verified) spawn-mode GB<->GB ping.
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A virtual switch/router/DHCP for N emulators. It leases each Game Boy a distinct
address (10.0.0.2, 10.0.0.3, ...), routes packets between them by destination IP,
floods broadcasts, and NATs external traffic out a TUN. No kernel changes are
needed: the GB just sends to a dst IP over its one link and the hub decides
GB<->GB vs GB<->internet.
sudo tools/gbhub 2 netd "ping 10.0.0.2"
Verified two Game Boys talking to each other:
[GB0] dhcp: leased 10.0.0.2 [GB1] dhcp: leased 10.0.0.3
[GB0] netd: up (10.0.0.2) [GB1] ping 10.0.0.2 -> 4/4 received
DHCP is keyed per connection (not MAC), so identical GBs still get unique IPs;
each emulator gets its own ROM copy so battery saves don't clash.
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