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feat(openwrt): open !FIPS access SSID layer (#126)
Access layer for phones and laptops to reach FIPS routers on OpenWrt, stacked on the 802.11s mesh backhaul from #123. Squashed from five commits by Arjen (Origami74); their original messages follow. * feat(openwrt): open !FIPS access SSID — fips-ap-setup helper, default transport binding, how-to Client access layer for phones and laptops: every FIPS router broadcasts the same open SSID ('!FIPS' — the leading '!' sorts it to the top of alphabetically ordered network pickers), forming one standard ESS. Clients save it once and roam between all FIPS routers natively, with FIPS's Noise IK handshake as the only security layer: - fips-ap-setup: opt-in UCI helper that creates the 'fips-ap0' open AP (encryption none — security type must be uniform across routers or clients treat the ESS as different saved networks), an isolated network with a static ULA /64, RA-only odhcpd addressing (stateless SLAAC, no DHCP — the minimum that satisfies Android's provisioning check; no internet by design, so phones keep cellular as default route), and a locked-down fips_ap firewall zone (no path to br-lan or the WAN; only ICMPv6, mDNS, and the FIPS transports reachable). 'remove' subcommand undoes it. Radio setup stays opt-in; a package must not commandeer radios on install. - fips.yaml: ship 'ap0'/'ap1' Ethernet-transport entries commented out (matching the 802.11s mesh backhaul) so a stock install that never creates fips-ap* logs no per-boot "interface missing" bind warning; fips-ap-setup uncomments the matching block when it creates the interface and re-comments it on remove. - Regression test: extend shipped_openwrt_config_parses to assert the ap0/ap1 entries ship commented out and still parse once uncommented, alongside mesh0/mesh1. - Packaging: install the helper in ipk/apk/buildroot (three synced copies), extend CI structural checks and shellcheck targets. - docs/how-to/set-up-open-access-ssid.md: full guide, including the one-time 'no internet, stay connected' acceptance (stored per SSID, covers every FIPS router) and the security-type-uniformity constraint. * docs(openwrt): correct open-SSID/mesh security framing — peering is open by design The fips-ap-setup/fips-mesh-setup comments and both how-tos claimed a stranger "cannot pass the FIPS handshake" / "their frames die at the handshake" / the handshake surface "drops them". That is wrong: FIPS peer admission is open. An inbound handshake from any net-new identity is promoted (node::handlers::handshake::promote_connection), gated only by the daemon's max-peers cap — there is no allowlist, no PSK, and the AuthChallenge path is not wired to admission. The Noise IK handshake provides authentication (no impersonation of another identity, no MITM), not authorization. Restate the model accurately in all five places: a stranger on the open SSID (or the open mesh) can associate AND form a FIPS peer link — that is the point of open access. Containment is the isolated fips_ap zone (no path to br-lan or the WAN) plus the max-peers cap, not the handshake. Clarify that AP client isolation is an L2 control only: a peered stranger is an overlay peer like any other, so the FIPS overlay, not L2, is the trust boundary between clients. * feat(openwrt): serve DHCPv4 on the access SSID from a fixed roamable subnet RA-only addressing satisfied Android's provisioning check but left anything expecting IPv4 with a self-assigned address and a "no IP" complaint. dnsmasq now leases out of 10.21.<N>.0/24 (N = radio index; prefix echoes FIPS port 2121), deliberately identical on every router: a roaming client keeps its lease across the ESS, and dnsmasq's authoritative mode — the OpenWrt default, pinned by the helper — ACKs the renew a foreign router never issued. Lease collisions across routers surface as a NAK on renew and the client re-DHCPs. The dhcp section's 'dhcpv4 server' is read by both dnsmasq (default images) and odhcpd (only with maindhcp), so either arrangement serves. A DHCPv4/udp-67 accept rule joins the fips_ap zone; DHCPv6 stays off, the ULA RA stays as-is, and nothing depends on an upstream. The zone remains isolated — no forwardings, no internet. * feat(openwrt): enable mDNS rendezvous from fips-ap-setup Phone FIPS apps cannot open raw-Ethernet sockets, so DNS-SD is how they find the router's daemon — but node.rendezvous.lan defaults to off. Ship the lan block commented in fips.yaml (consistent with the apN transport entries) and have fips-ap-setup uncomment it when creating the access SSID. The awk match is scoped to node.rendezvous because transports.ethernet carries a 'lan' entry at the same indent. The switch is daemon-wide, so 'remove' deliberately leaves it on rather than guess whether other transports rely on it. * fix(openwrt): bind UDP dual-stack [::]:2121 so access-SSID clients reach it The shipped router config bound the UDP transport "0.0.0.0:2121" (IPv4 wildcard) while the mDNS LAN advert announces every interface address, including the router's IPv6 link-local — which phones on the !FIPS access SSID rightly prefer (their cellular default route swallows v4, and fd00::/8 is captured by the Myco mesh TUN). Result: the client's Noise msg1 arrives on an unbound v6 port and is silently lost; the handshake resends and times out. Symptom chain (observed on-device): mDNS resolve OK, platform push OK, "Sent Noise handshake message 1" to [fe80::…%N]:2121, four resends, no reply, 30 s stale-timeout. OpenWrt is Linux (bindv6only=0), so "[::]" accepts IPv4 via v4-mapped addresses too — nothing is lost. packaging/common is deliberately left on "0.0.0.0" for now: Windows defaults IPV6_V6ONLY=1, where "[::]" would drop v4 instead.
This commit is contained in:
Arjen
@@ -99,6 +99,9 @@ define Package/fips/install
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# 802.11s mesh backhaul setup helper
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$(INSTALL_BIN) $(CURDIR)/files/usr/bin/fips-mesh-setup $(1)/usr/bin/fips-mesh-setup
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# Open "FIPS" access SSID setup helper
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$(INSTALL_BIN) $(CURDIR)/files/usr/bin/fips-ap-setup $(1)/usr/bin/fips-ap-setup
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# procd init script
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$(INSTALL_DIR) $(1)/etc/init.d
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$(INSTALL_BIN) $(CURDIR)/files/etc/init.d/fips $(1)/etc/init.d/fips
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@@ -162,6 +162,7 @@ install -m 0755 "$RELEASE_DIR/fipsctl" "$DATA_DIR/usr/bin/fipsctl"
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install -m 0755 "$RELEASE_DIR/fipstop" "$DATA_DIR/usr/bin/fipstop"
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install -m 0755 "$RELEASE_DIR/fips-gateway" "$DATA_DIR/usr/bin/fips-gateway"
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install -m 0755 "$FILES_DIR/usr/bin/fips-mesh-setup" "$DATA_DIR/usr/bin/fips-mesh-setup"
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install -m 0755 "$FILES_DIR/usr/bin/fips-ap-setup" "$DATA_DIR/usr/bin/fips-ap-setup"
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install -d "$DATA_DIR/etc/init.d"
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install -m 0755 "$FILES_DIR/etc/init.d/fips" "$DATA_DIR/etc/init.d/fips"
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@@ -43,6 +43,14 @@ node:
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# - "stun:stun.cloudflare.com:3478"
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# - "stun:global.stun.twilio.com:3478"
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# mDNS/DNS-SD peer rendezvous on the local link. Ships commented (the
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# daemon default is off); 'fips-ap-setup' uncomments it when creating
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# the access SSID — phone FIPS apps cannot see raw-Ethernet beacons,
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# so mDNS is how they find this router's daemon. Daemon-wide switch,
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# left enabled on 'fips-ap-setup remove'.
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# lan:
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# enabled: true
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tun:
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enabled: true
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name: fips0
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@@ -64,7 +72,11 @@ dns:
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transports:
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udp:
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bind_addr: "0.0.0.0:2121"
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# Dual-stack wildcard, not "0.0.0.0": access-SSID clients (phones) learn
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# this node's addresses from the mDNS advert and prefer the IPv6
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# link-local — a v4-only bind silently drops their Noise msg1.
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# OpenWrt is Linux (bindv6only=0), so "[::]" accepts v4 too.
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bind_addr: "[::]:2121"
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# advertise_on_nostr: true
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# public: false # false => advertise udp:nat; true => advertise bound host:port
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# accept_connections: true # default; refuse inbound msg1 when false
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@@ -126,6 +138,30 @@ transports:
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# auto_connect: true
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# accept_connections: true
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# Open "!FIPS" access SSID for phones and laptops running FIPS. These
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# entries ship commented out so a stock install that never creates
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# fips-ap* logs no per-boot "interface missing" bind warning. Running
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# 'fips-ap-setup <radio>' creates the interface AND uncomments the
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# matching block here (once per radio; radio0 -> fips-ap0, radio1 ->
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# fips-ap1); 'fips-ap-setup remove' re-comments it. Restart fips after
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# — a transport whose interface is missing at startup is skipped, not
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# retried. The SSID is OPEN and isolated on purpose: FIPS's Noise
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# handshake is the only security layer, and associated clients reach
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# nothing but the FIPS handshake surface. See
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# docs/how-to/set-up-open-access-ssid.md.
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# ap0:
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# interface: "fips-ap0"
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# discovery: true
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# announce: true
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# auto_connect: true
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# accept_connections: true
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# ap1:
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# interface: "fips-ap1"
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# discovery: true
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# announce: true
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# auto_connect: true
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# accept_connections: true
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# Bluetooth Low Energy transport — requires BlueZ and the 'ble' feature.
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# ble:
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# adapter: "hci0"
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+412
@@ -0,0 +1,412 @@
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#!/bin/sh
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# fips-ap-setup — configure the open "FIPS" access SSID for phones/laptops.
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#
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# Usage:
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# fips-ap-setup <radio> [ssid] e.g. fips-ap-setup radio0
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# fips-ap-setup remove [radio] no radio: remove all instances
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#
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# Creates an open AP on the given radio so client devices running FIPS can
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# reach the router. Every FIPS router broadcasts the SAME SSID ("!FIPS" by
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# default — the leading '!' sorts it to the top of alphabetically ordered
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# network pickers): same SSID + unique BSSIDs is one standard ESS, so a
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# phone saves the network once and roams between all FIPS routers natively.
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#
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# - encryption 'none' — the AP is OPEN on purpose. FIPS's Noise IK
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# handshake authenticates and encrypts everything above the radio, and
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# the security type must be uniform across ALL routers anyway: clients
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# key a saved network on SSID + security type, so one router with a PSK
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# splits the ESS into a different saved network. A stranger can
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# associate AND form a FIPS peer link — that is the point of open
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# access. The Noise handshake authenticates each link (no
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# impersonation of another identity, no MITM); it does NOT gate who
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# may peer. Admission is open up to the daemon's max-peers cap; the
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# firewall zone below is what confines every client to the FIPS
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# overlay (no path to br-lan or the WAN).
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# - DHCPv4 + RA IPv6 — dnsmasq serves DHCPv4 from a FIXED subnet,
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# 10.21.<N>.0/24 (echoes FIPS port 2121), identical on every router:
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# a roaming phone keeps its lease across routers, and dnsmasq's
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# authoritative mode (the OpenWrt default) ACKs the renew a foreign
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# router never issued. odhcpd additionally announces a ULA prefix in
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# router advertisements (stateless SLAAC); DHCPv6 stays off. FIPS
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# itself only needs link-local + mDNS, but client provisioning checks
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# (Android disconnects without an RA or a DHCP offer) and plain
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# laptops both want a real address. The network provides no internet,
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# so phones mark it unvalidated and keep cellular as the default
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# route while staying associated.
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# - ISOLATED — own network and firewall zone: no path to
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# br-lan, no forwarding to the WAN, and AP client isolation on.
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# Associated clients reach only the FIPS handshake surface.
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#
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# Interfaces are named per radio index (radio0 -> fips-ap0, radio1 ->
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# fips-ap1). Unlike the 802.11s backhaul there is NO same-channel
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# constraint — clients scan when they roam, so every router picks its
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# access channels freely.
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#
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# The shipped /etc/fips/fips.yaml carries 'ap0' and 'ap1' entries under
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# 'transports.ethernet' bound to these names, but commented out — a stock
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# install that never creates fips-ap* then logs no bind warning. This
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# helper uncomments the matching entry when it creates an interface and
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# re-comments it on remove, so the daemon binds the transport without a
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# manual config edit. It also uncomments the node.rendezvous.lan block
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# (mDNS/DNS-SD — how phone FIPS apps discover the daemon); that switch is
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# daemon-wide and stays on at remove. After an interface is up, restart
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# fips.
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# See docs/how-to/set-up-open-access-ssid.md for the full guide.
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DEFAULT_SSID="!FIPS"
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CONFIG="/etc/fips/fips.yaml"
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# Replace $CONFIG with the rewritten $CONFIG.tmp. Force mode 0600 first: the
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# package installs fips.yaml 0600 (it may hold an inline 'nsec' private key),
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# and a fresh tmp file would otherwise land world-readable after the move.
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ap_config_write() {
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chmod 600 "$CONFIG.tmp" && mv "$CONFIG.tmp" "$CONFIG"
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}
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# Uncomment the 'ap<idx>' transports.ethernet block in $CONFIG (created by
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# 'fips-ap-setup'). Reversible with ap_config_disable. Returns:
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# 0 enabled (or already active) 1 no config file 2 no such block
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ap_config_enable() {
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idx="$1"
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[ -f "$CONFIG" ] || return 1
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grep -q "^ ap$idx:" "$CONFIG" && return 0
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grep -q "^ # ap$idx:" "$CONFIG" || return 2
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awk -v idx="$idx" '
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$0 ~ ("^ # ap" idx ":[ \t]*$") { blk = 1; sub(/^ # /, " "); print; next }
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blk && /^ # / { sub(/^ # /, " "); print; next }
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{ blk = 0; print }
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' "$CONFIG" > "$CONFIG.tmp" && ap_config_write
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}
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# Uncomment the 'lan' block under node.rendezvous in $CONFIG — the daemon's
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# mDNS/DNS-SD responder+browser. Phone FIPS apps cannot open raw-Ethernet
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# sockets, so mDNS is how they find this router's daemon. The match is
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# scoped to node.rendezvous: transports.ethernet also has a 'lan' entry at
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# the same indent. Daemon-wide switch — enabled here, deliberately NOT
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# re-commented on remove (other transports use it once on). Returns:
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# 0 enabled (or already active) 1 no config file 2 no such block
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lan_rendezvous_enable() {
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[ -f "$CONFIG" ] || return 1
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state="$(awk '
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/^[A-Za-z_]/ { top = $1 }
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top == "node:" && /^ [A-Za-z_]/ { sec = $1 }
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top == "node:" && sec == "rendezvous:" && /^ lan:[ \t]*$/ { print "active"; exit }
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top == "node:" && sec == "rendezvous:" && /^ # lan:[ \t]*$/ { print "commented"; exit }
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' "$CONFIG")"
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case "$state" in
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active) return 0 ;;
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commented) ;;
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*) return 2 ;;
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esac
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awk '
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/^[A-Za-z_]/ { top = $1 }
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top == "node:" && /^ [A-Za-z_]/ { sec = $1 }
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top == "node:" && sec == "rendezvous:" && $0 ~ /^ # lan:[ \t]*$/ { blk = 1; sub(/^ # /, " "); print; next }
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blk && /^ # / { sub(/^ # /, " "); print; next }
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{ blk = 0; print }
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' "$CONFIG" > "$CONFIG.tmp" && ap_config_write
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}
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# Re-comment the 'ap<idx>' block so the daemon stops binding it (and stops
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# warning about the now-missing interface). Inverse of ap_config_enable.
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ap_config_disable() {
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idx="$1"
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[ -f "$CONFIG" ] || return 1
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grep -q "^ ap$idx:" "$CONFIG" || return 0
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awk -v idx="$idx" '
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$0 ~ ("^ ap" idx ":[ \t]*$") { blk = 1; sub(/^ /, " # "); print; next }
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blk && /^ / { sub(/^ /, " # "); print; next }
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{ blk = 0; print }
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' "$CONFIG" > "$CONFIG.tmp" && ap_config_write
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}
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usage() {
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echo "Usage: fips-ap-setup <radio> [ssid]" >&2
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echo " fips-ap-setup remove [radio]" >&2
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echo "Radios on this device:" >&2
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uci show wireless 2>/dev/null | sed -n "s/^wireless\.\([^.]*\)=wifi-device$/ \1/p" >&2
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exit 1
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}
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# List the UCI section names of fips-managed access-point wifi-ifaces.
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ap_sections() {
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uci show wireless 2>/dev/null | sed -n "s/^wireless\.\(fips_ap[^.=]*\)=wifi-iface$/\1/p"
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}
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# ---------------------------------------------------------------------------
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# remove [radio] — delete the wireless, network, dhcp, and firewall sections
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# created below
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# ---------------------------------------------------------------------------
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if [ "$1" = "remove" ]; then
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if [ -n "$2" ]; then
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SECTIONS="fips_ap_$(printf '%s' "$2" | tr -c 'a-zA-Z0-9_' '_')"
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else
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SECTIONS="$(ap_sections)"
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fi
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[ -n "$SECTIONS" ] || {
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echo "No fips access-point instances configured."
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exit 0
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}
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for section in $SECTIONS; do
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ifname="$(uci -q get "wireless.$section.ifname")"
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uci -q delete "wireless.$section"
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uci -q delete "network.$section"
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uci -q delete "dhcp.$section"
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uci -q del_list "firewall.fips_ap.network=$section"
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# Re-comment the matching ap<N> transport in fips.yaml so the
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# daemon stops warning about the interface we just removed.
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idx="$(printf '%s' "$ifname" | sed -n 's/.*[^0-9]\([0-9]\{1,\}\)$/\1/p')"
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[ -n "$idx" ] && ap_config_disable "$idx"
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echo "Removed ${ifname:-$section}."
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done
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# Drop the shared zone and its rules once the last instance is gone.
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if [ -z "$(uci -q get firewall.fips_ap.network)" ]; then
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uci -q delete firewall.fips_ap
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uci -q delete firewall.fips_ap_icmpv6
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uci -q delete firewall.fips_ap_dhcpv4
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uci -q delete firewall.fips_ap_mdns
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uci -q delete firewall.fips_ap_fips_udp
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uci -q delete firewall.fips_ap_fips_tcp
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fi
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uci commit wireless
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uci commit network
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uci commit dhcp
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uci commit firewall
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wifi reload
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/etc/init.d/dnsmasq reload
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/etc/init.d/odhcpd reload
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/etc/init.d/firewall reload
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echo "Restart fips: /etc/init.d/fips restart"
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exit 0
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fi
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RADIO="$1"
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SSID="${2:-$DEFAULT_SSID}"
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[ -n "$RADIO" ] || usage
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if [ "$(uci -q get "wireless.$RADIO")" != "wifi-device" ]; then
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echo "Error: '$RADIO' is not a wifi-device in /etc/config/wireless." >&2
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usage
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fi
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# One instance per radio: section fips_ap_<radio>, netdev fips-ap<N>
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# where N is the radio's trailing index (radio0 -> fips-ap0). For radios
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# named without a trailing number, fall back to the first free index.
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SECTION="fips_ap_$(printf '%s' "$RADIO" | tr -c 'a-zA-Z0-9_' '_')"
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IDX="$(printf '%s' "$RADIO" | sed -n 's/.*[^0-9]\([0-9]\{1,\}\)$/\1/p')"
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[ -n "$IDX" ] || IDX="$(printf '%s' "$RADIO" | sed -n 's/^\([0-9]\{1,\}\)$/\1/p')"
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if [ -z "$IDX" ]; then
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IDX=0
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while uci show wireless 2>/dev/null | grep -q "\.ifname='fips-ap$IDX'"; do
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IDX=$((IDX + 1))
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done
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fi
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AP_IFNAME="fips-ap$IDX"
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# Refuse a name collision from another radio's instance (e.g. two radios
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# whose names end in the same digit) rather than silently hijacking it.
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OWNER="$(uci show wireless 2>/dev/null \
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| sed -n "s/^wireless\.\(fips_ap[^.=]*\)\.ifname='$AP_IFNAME'$/\1/p")"
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if [ -n "$OWNER" ] && [ "$OWNER" != "$SECTION" ]; then
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echo "Error: $AP_IFNAME is already used by section '$OWNER'." >&2
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echo "Remove it first: fips-ap-setup remove" >&2
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exit 1
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fi
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# ---------------------------------------------------------------------------
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# Wireless: open AP with client isolation. Clients of the same AP cannot
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# exchange L2 frames directly — two FIPS phones on one router still reach
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# each other through the router at the overlay layer. Isolation is an L2
|
||||
# control only: a stranger who peers is an overlay peer like any other, so
|
||||
# the FIPS overlay (not L2) is the trust boundary between clients.
|
||||
# ---------------------------------------------------------------------------
|
||||
|
||||
uci -q delete "wireless.$SECTION"
|
||||
uci set "wireless.$SECTION=wifi-iface"
|
||||
uci set "wireless.$SECTION.device=$RADIO"
|
||||
uci set "wireless.$SECTION.mode=ap"
|
||||
uci set "wireless.$SECTION.ssid=$SSID"
|
||||
uci set "wireless.$SECTION.encryption=none"
|
||||
uci set "wireless.$SECTION.isolate=1"
|
||||
uci set "wireless.$SECTION.ifname=$AP_IFNAME"
|
||||
uci set "wireless.$SECTION.network=$SECTION"
|
||||
|
||||
# Radios ship disabled on fresh OpenWrt installs; a disabled radio would
|
||||
# leave the AP down with no error anywhere visible.
|
||||
if [ "$(uci -q get "wireless.$RADIO.disabled")" = "1" ]; then
|
||||
echo "Note: enabling $RADIO (was disabled)."
|
||||
uci -q delete "wireless.$RADIO.disabled"
|
||||
fi
|
||||
|
||||
CHANNEL="$(uci -q get "wireless.$RADIO.channel")"
|
||||
BAND="$(uci -q get "wireless.$RADIO.band")"
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# Network: IPv4 from the fixed convention 10.21.<IDX>.1/24 — deterministic,
|
||||
# so every router serving the same radio index lands on the same subnet and
|
||||
# a roaming client's lease stays valid. IPv6 is a static ULA /64 so odhcpd
|
||||
# has a prefix to announce; that space is per-router and disposable — a
|
||||
# roaming phone SLAACs a fresh address on each router, and the FIPS overlay
|
||||
# identity (not the IP) is the mobility anchor. The ULA is derived from the
|
||||
# router's global ULA prefix; a re-run keeps the address already configured.
|
||||
# ---------------------------------------------------------------------------
|
||||
|
||||
AP_ADDR="$(uci -q get "network.$SECTION.ip6addr")"
|
||||
case "$AP_ADDR" in
|
||||
fd*) ;; # keep the existing address on re-run
|
||||
*)
|
||||
ULA_BASE=""
|
||||
ULA_PREFIX="$(uci -q get network.globals.ula_prefix)"
|
||||
case "$ULA_PREFIX" in
|
||||
fd*::/48) ULA_BASE="${ULA_PREFIX%::/48}" ;;
|
||||
esac
|
||||
if [ -z "$ULA_BASE" ]; then
|
||||
HEX="$(head -c 5 /dev/urandom | hexdump -e '5/1 "%02x"')"
|
||||
ULA_BASE="fd$(printf '%s' "$HEX" | cut -c1-2):$(printf '%s' "$HEX" | cut -c3-6):$(printf '%s' "$HEX" | cut -c7-10)"
|
||||
echo "Note: no usable ULA prefix in network.globals — generated $ULA_BASE::/48 for this AP."
|
||||
fi
|
||||
# 64000 = 0xfa00 — high subnet IDs keep clear of br-lan's low
|
||||
# ip6assign allocations from the same ULA prefix.
|
||||
AP_ADDR="$ULA_BASE:$(printf '%04x' $((64000 + IDX)))::1/64"
|
||||
;;
|
||||
esac
|
||||
|
||||
AP_ADDR4="10.21.$IDX.1"
|
||||
|
||||
uci -q delete "network.$SECTION"
|
||||
uci set "network.$SECTION=interface"
|
||||
uci set "network.$SECTION.proto=static"
|
||||
uci set "network.$SECTION.ipaddr=$AP_ADDR4"
|
||||
uci set "network.$SECTION.netmask=255.255.255.0"
|
||||
uci set "network.$SECTION.ip6addr=$AP_ADDR"
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# DHCP/RA: dnsmasq DHCPv4 leases out of 10.21.<IDX>.0/24, plus router
|
||||
# advertisements for the ULA (stateless SLAAC, no DHCPv6). ra_default '2'
|
||||
# announces a default router even without an upstream default route:
|
||||
# Android's provisioning wants address + route + DNS, and its validation
|
||||
# probe then fails by design (no internet), so the phone keeps cellular as
|
||||
# the default route. 'dhcpv4 server' is read by BOTH dnsmasq (the default
|
||||
# DHCPv4 server) and odhcpd (serves v4 only when odhcpd.maindhcp is set),
|
||||
# so either arrangement hands out leases.
|
||||
# ---------------------------------------------------------------------------
|
||||
|
||||
uci -q delete "dhcp.$SECTION"
|
||||
uci set "dhcp.$SECTION=dhcp"
|
||||
uci set "dhcp.$SECTION.interface=$SECTION"
|
||||
uci set "dhcp.$SECTION.ra=server"
|
||||
uci set "dhcp.$SECTION.ra_default=2"
|
||||
uci set "dhcp.$SECTION.dhcpv6=disabled"
|
||||
uci set "dhcp.$SECTION.dhcpv4=server"
|
||||
uci set "dhcp.$SECTION.start=10"
|
||||
uci set "dhcp.$SECTION.limit=200"
|
||||
|
||||
# Authoritative is the OpenWrt default, but roaming correctness depends on
|
||||
# it (a foreign router must ACK a lease it never issued), so pin it.
|
||||
[ -n "$(uci -q get dhcp.@dnsmasq[0])" ] && uci set dhcp.@dnsmasq[0].authoritative=1
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
# Firewall: one shared 'fips_ap' zone for all instances. Everything is
|
||||
# rejected except what a FIPS client needs — DHCPv4 (addressing), ICMPv6
|
||||
# (SLAAC itself), mDNS (discovery), and the FIPS UDP/TCP transports (the
|
||||
# handshake surface).
|
||||
# The raw-Ethernet transport (EtherType 0x2121) is not IP and never
|
||||
# traverses the firewall. No forwardings exist, so there is no path to
|
||||
# br-lan or the WAN.
|
||||
# ---------------------------------------------------------------------------
|
||||
|
||||
if [ "$(uci -q get firewall.fips_ap)" != "zone" ]; then
|
||||
uci set firewall.fips_ap=zone
|
||||
fi
|
||||
uci set firewall.fips_ap.name=fips_ap
|
||||
uci set firewall.fips_ap.input=REJECT
|
||||
uci set firewall.fips_ap.output=ACCEPT
|
||||
uci set firewall.fips_ap.forward=REJECT
|
||||
uci -q del_list "firewall.fips_ap.network=$SECTION"
|
||||
uci add_list "firewall.fips_ap.network=$SECTION"
|
||||
|
||||
# ap_rule <section-suffix> <name> <proto> [dest_port]
|
||||
ap_rule() {
|
||||
rule="firewall.fips_ap_$1"
|
||||
uci -q delete "$rule"
|
||||
uci set "$rule=rule"
|
||||
uci set "$rule.name=$2"
|
||||
uci set "$rule.src=fips_ap"
|
||||
uci set "$rule.proto=$3"
|
||||
uci set "$rule.target=ACCEPT"
|
||||
[ -z "${4:-}" ] || uci set "$rule.dest_port=$4"
|
||||
}
|
||||
|
||||
ap_rule icmpv6 "FIPS-AP-ICMPv6" icmp
|
||||
uci set firewall.fips_ap_icmpv6.family=ipv6
|
||||
ap_rule dhcpv4 "FIPS-AP-DHCPv4" udp 67
|
||||
uci set firewall.fips_ap_dhcpv4.family=ipv4
|
||||
ap_rule mdns "FIPS-AP-mDNS" udp 5353
|
||||
ap_rule fips_udp "FIPS-AP-FIPS-UDP" udp 2121
|
||||
ap_rule fips_tcp "FIPS-AP-FIPS-TCP" tcp 8443
|
||||
|
||||
uci commit wireless
|
||||
uci commit network
|
||||
uci commit dhcp
|
||||
uci commit firewall
|
||||
wifi reload
|
||||
/etc/init.d/dnsmasq reload
|
||||
/etc/init.d/odhcpd reload
|
||||
/etc/init.d/firewall reload
|
||||
|
||||
# Enable the matching ap<N> transport in the shipped fips.yaml (it ships
|
||||
# commented out). Tailor the restart hint to what we could do.
|
||||
ap_config_enable "$IDX"
|
||||
case $? in
|
||||
0) TRANSPORT_NOTE="The ap$IDX transport in $CONFIG that binds '$AP_IFNAME' is
|
||||
now uncommented and enabled." ;;
|
||||
1) TRANSPORT_NOTE="No $CONFIG found — add a transports.ethernet entry binding
|
||||
interface '$AP_IFNAME' by hand." ;;
|
||||
*) TRANSPORT_NOTE="No 'ap$IDX' entry in $CONFIG — add a transports.ethernet
|
||||
entry binding interface '$AP_IFNAME' by hand (copy the ap0 block)." ;;
|
||||
esac
|
||||
|
||||
# Phones discover the daemon via mDNS, not raw-Ethernet beacons — make sure
|
||||
# the daemon-wide mDNS rendezvous is on.
|
||||
if lan_rendezvous_enable; then
|
||||
MDNS_NOTE="node.rendezvous.lan (mDNS) is enabled — phone FIPS apps
|
||||
discover this router via DNS-SD."
|
||||
else
|
||||
MDNS_NOTE="Could not enable mDNS in $CONFIG — set
|
||||
'node.rendezvous.lan.enabled: true' by hand; phone FIPS apps rely
|
||||
on it to discover this router."
|
||||
fi
|
||||
|
||||
cat <<EOF
|
||||
Created open access SSID '$SSID' as $AP_IFNAME on $RADIO \
|
||||
(band ${BAND:-?}, channel ${CHANNEL:-auto}).
|
||||
DHCPv4 on $AP_ADDR4/24 and RA IPv6 on $AP_ADDR — no internet,
|
||||
isolated from br-lan and the WAN.
|
||||
|
||||
ALL FIPS routers must broadcast this SSID with the same security type
|
||||
(open) — phones then save it once and roam between routers as one
|
||||
network. The 10.21.$IDX.0/24 subnet is the same on every router on
|
||||
purpose: leases survive roaming. Unlike the mesh backhaul, channels
|
||||
are free per router. On a dual-band router, run fips-ap-setup for the
|
||||
other radio too so clients can pick either band.
|
||||
|
||||
On first connect a phone warns that the network has no internet —
|
||||
choose "stay connected" and "don't ask again". That choice is stored
|
||||
per SSID, so it covers every FIPS router.
|
||||
|
||||
Next steps:
|
||||
1. $TRANSPORT_NOTE
|
||||
2. $MDNS_NOTE
|
||||
Restart the daemon AFTER the interface is up — a transport whose
|
||||
interface is missing at startup is skipped, not retried:
|
||||
/etc/init.d/fips restart
|
||||
3. Associate a phone or laptop running FIPS and verify:
|
||||
iw dev $AP_IFNAME station dump
|
||||
and the FIPS link on top of it:
|
||||
fipsctl show peers
|
||||
|
||||
Run 'fips-ap-setup remove' to undo all instances, or
|
||||
'fips-ap-setup remove $RADIO' for just this one.
|
||||
EOF
|
||||
@@ -14,8 +14,10 @@
|
||||
# - encryption 'none' — the mesh is OPEN on purpose. FIPS's Noise IK
|
||||
# handshake authenticates and encrypts every peer link, so SAE would
|
||||
# only duplicate that (and on ath10k it forces the slower raw Tx/Rx
|
||||
# firmware mode). A stranger can form an 802.11s peering but cannot
|
||||
# pass the FIPS handshake.
|
||||
# firmware mode). A stranger can form an 802.11s peering AND a FIPS
|
||||
# peer link — the Noise handshake authenticates each link (no
|
||||
# impersonation of another identity, no MITM), it does not gate who
|
||||
# may peer. Admission is open up to the daemon's max-peers cap.
|
||||
# - mesh_fwding '0' — disables 802.11s HWMP forwarding so each mesh
|
||||
# link is a plain L2 neighbor link. FIPS is the routing layer; two
|
||||
# routing layers would fight.
|
||||
|
||||
Reference in New Issue
Block a user