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…ity DNS Replicates inside the core what a DreamPi (Kazade/dreampi) does beside a real Dreamcast: - reicast_dns_server core option picks the resolver handed to the emulated console over PPP (dns.flyca.st / Shuouma 46.101.91.123 / DreamPi alternate 209.50.50.129 / 8.8.8.8). The legacy 46.101.91.123->dns.flyca.st rewrite is removed so an explicit choice is honored literally. - reicast_dcnow: UdpSink snoops the Dreamcast's DNS queries and a worker POSTs sha256(hostname) to dcnow-2016.appspot.com every 15 s over plain HTTP/80, like dcnow.py; shared domains post once per session. - Port 1998 answers the DreamPi config_server.py JSON with CORS so dreamcast.online/now detects the emulator as a DreamPi; browser GETs get a config page and POST accepts mac=/enable/disable, which is also the only way to set the MAC without editing files (core options are enum-only). - reicast_dcnow_mac: 'auto' uses/generates flycast_dcnow.id in the save dir; a literal AA:BB:CC:DD:EE:FF claims a specific identity (e.g. a real DreamPi's MAC); uppercased before hashing like the Pi's %012X. Generated with [Devin](https://devin.ai) Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
dcnow.cpp shuts down the :1998 listen socket with SHUT_RDWR to break the accept loop; Winsock spells it SD_BOTH, so map it alongside the existing SHUT_RD/SHUT_WR definitions. Needed to build the feature on Windows/mingw. Generated with [Devin](https://devin.ai) Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
option.h: pull <cstring>/<cstdlib> in before namespace config — option_lr.h is included inside 'namespace config', so any header it includes there creates a nested config::std on toolchains where the headers were not already pulled in (clang/libc++), breaking every std:: lookup in the file. rtl8139c.cpp: <cstdlib> for calloc/free. oslib.h: <malloc.h> on _WIN32 for _aligned_malloc/_aligned_free. No functional change; needed to build the core with llvm-mingw. Generated with [Devin](https://devin.ai) Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Owner
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I am not sure the team behind Dreamcast Now/DreamPi would agree or be happy with this integration. Did you reach out to them to get their feeling? |
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Summary
Adds the missing pieces that make libretro Flycast behave like a real DreamPi-equipped Dreamcast for the community service ecosystem — no external Pi required:
reicast_dcnow): reports the running session to dreamcast.online with a stable player identity. The ID is a SHA-256 of a normalized MAC-derived identity, persisted inflycast_dcnow.id(save dir), so the same player keeps the same ID across sessions and can claim it on the site.config_server.py— GET returns the JSON Dreamcast Now expects, and the built-in browser page lets the user view the player ID and set a custom MAC / enable-disable presence without editing option files.reicast_dcnow_mac):autoby default; a literalXX:XX:XX:XX:XX:XXvalue (orenabledfor the generated identity) can be set through the options file or the :1998 page, since libretro core options are enum-only and can't accept free text.reicast_dns_server): intercepts the emulated Dreamcast's DNS queries and forwards them todns.flyca.st, Shuouma (46.101.91.123), the alternate DreamPi DNS (209.50.50.129), or standard DNS — covering the services DreamPi users normally get for free.Why
On DreamPi hardware all of this is "automatic": presence on dreamcast.online, the config endpoint that the site uses to find and validate the device, and DNS redirection to the community servers. Console/embedded ports (and headless libretro frontends) have no way to reproduce any of it today — the only options are buying/building a DreamPi or running the emulated Dreamcast behind one. This gives every libretro user the same experience natively.
Windows portability fixes included
Building the feature on Windows/mingw surfaced two real portability bugs, fixed in this PR:
net_platform.h:SHUT_RDWRwas unmapped on Winsock (SD_BOTH)option.h,oslib.h,rtl8139c.cpp)Verified: builds clean with llvm-mingw (clang 23) producing a working
flycast_libretro.dllwith all libretro exports, and on the libretro fork CI targets.Files
core/cfg/option.*,core/network/{CMakeLists.txt,dcnow.cpp,dcnow.h,net_platform.h,picoppp.cpp},shell/libretro/{libretro.cpp,libretro_core_options.h,option.cpp}(+ small include fixes inoslib.h,rtl8139c.cpp,option.h)Same change set as sysfce2#186 (the libretro mirror), submitted here so it lands upstream first.
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