portal: add WIFI_CREATE op (portal-bridged cfg80211 wiphy)#93
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Register a real cfg80211 wiphy + netdev on a host WIFI_CREATE portal op, mirroring portal_mtd.c's create-with-callbacks pattern. Its .scan op calls back to a host plugin that reports a modeled set of BSSes, so a rehosted target can perceive a scriptable Wi-Fi RF environment during emulation with no mac80211_hwsim and no kernel rebuild (links against cfg80211, already =y). - portal_op_list.h: X(wifi_create, WIFI_CREATE) (auto-declares + dispatches) - portal_wifi.c: handle_op_wifi_create + delayed-work .scan bridge that packs host-provided BSS entries via cfg80211_inform_bss / cfg80211_scan_done
Extend the portal-bridged wiphy with three more nl80211 ops so a host plugin can model the channel picture and connected-client link stats, not just scan results: - .dump_survey → per-channel noise floor + active/busy time (SURVEY_INFO_*). - .dump_station → per-peer signal, inactive/connected time, rx/tx bytes64+packets. - .get_station → resolve a MAC by walking the idx-based station callback. Wiring mirrors the existing scan callback: portal_wifi_create_req gains cb_survey_ptr + cb_station_ptr (host trampolines), and a small per-device scratch buffer (PW_OP_BUF_SZ) backs the one-entry-per-call .dump_* iteration. No new portal op — reuses WIFI_CREATE. New on-wire structs portal_wifi_survey / portal_wifi_station (packed) carry the entries; the driver's DWARF-derived ISF exposes them so the host resolves the layouts by name.
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What
Adds a new portal device type: a portal-bridged virtual cfg80211 wiphy, mirroring how MTD is done (
portal_mtd.c).On a host
WIFI_CREATEportal op,handle_op_wifi_createregisters a real cfg80211wiphy+ netdev (station mode, 2.4 GHz band). Its.scanop schedules work that calls a host-provided callback, then reports the returned BSSes viacfg80211_inform_bss/cfg80211_scan_done.Why
Lets a rehosted target perceive a scriptable Wi-Fi RF environment (neighbor APs, SSID/channel/signal) during emulation — the Wi-Fi analog of a host-modeled control plane — where the real radio driver can't load. Needs no
mac80211_hwsimand no kernel rebuild: it links againstcfg80211, which is already=yin the donor kernels, and ships entirely in the driver + a host plugin.Changes
portal_op_list.h:X(wifi_create, WIFI_CREATE)— the X-macro auto-declares the handler prototype and auto-wires the dispatch table, so this one line is the whole op wiring.portal_wifi.c(new; Makefile auto-globsportal/*.c): the create handler, request struct (ifname/mac + scan callback ptr), a packed on-wire BSS entry format, a minimal netdev, and the delayed-work.scanbridge.Testing
Built for mipsel/6.13 (MODPOST clean — cfg80211 symbols resolve; module is GPL). On a live rehost the host plugin creates the wiphy at boot, and
iw dev <if> scan/iwinfo <if> scanreturn the host-modeled BSSes.Follow-ups
.dump_survey(channel noise/utilization) and AP-mode.get_station/.dump_station(connected-client RSSI).