hostapd: add Multi-AP patches and config options

Cherry-pick Multi-AP commits from uptream:
 9c06f0f6a hostapd: Add Multi-AP protocol support
 5abc7823b wpa_supplicant: Add Multi-AP backhaul STA support
 a1debd338 tests: Refactor test_multi_ap
 bfcdac1c8 Multi-AP: Don't reject backhaul STA on fronthaul BSS
 cb3c156e7 tests: Update multi_ap_fronthaul_on_ap to match implementation
 56a2d788f WPS: Add multi_ap_subelem to wps_build_wfa_ext()
 83ebf5586 wpa_supplicant: Support Multi-AP backhaul STA onboarding with WPS
 66819b07b hostapd: Support Multi-AP backhaul STA onboarding with WPS
 8682f384c hostapd: Add README-MULTI-AP
 b1daf498a tests: Multi-AP WPS provisioning

Add support for Multi-AP to the UCI configuration. Every wifi-iface gets
an option 'multi_ap'. For APs, its value can be 0 (multi-AP support
disabled), 1 (backhaul AP), 2 (fronthaul AP), or 3 (fronthaul + backhaul
AP). For STAs, it can be 0 (not a backhaul STA) or 1 (backhaul STA, can
only associate with backhaul AP).

Also add new optional parameter to wps_start ubus call of
wpa_supplicant to indicate that a Multi-AP backhaul link is required.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

1 files changed, 72 insertions, 0 deletions

diff --git a/package/network/services/hostapd/patches/553-tests-refactor-test_multi_ap.patch b/package/network/services/hostapd/patches/553-tests-refactor-test_multi_ap.patch
new file mode 100644
index 0000000000..240407fd1c
--- /dev/null
+++ b/package/network/services/hostapd/patches/553-tests-refactor-test_multi_ap.patch
@@ -0,0 +1,72 @@
+From 0f5029ff41ef286aa7b3e4a3efd3f1a16be925e8 Mon Sep 17 00:00:00 2001
+From: "Arnout Vandecappelle (Essensium/Mind)" <arnout@mind.be>
+Date: Wed, 9 Jan 2019 18:41:08 +0100
+Subject: [PATCH] tests: refactor test_multi_ap
+
+With just one additional argument, the run_multi_ap_association function
+can be used for all tests.
+
+While we're at it, also move it to the top of the file.
+
+Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
+---
+v4: new patch
+---
+ tests/hwsim/test_multi_ap.py | 30 +++++++++++-------------------
+ 1 file changed, 11 insertions(+), 19 deletions(-)
+
+--- a/tests/hwsim/test_multi_ap.py
++++ b/tests/hwsim/test_multi_ap.py
+@@ -6,6 +6,15 @@
+ 
+ import hostapd
+ 
++def run_multi_ap_association(dev, apdev, multi_ap, wait_connect=True):
++    params = hostapd.wpa2_params(ssid="multi-ap", passphrase="12345678")
++    if multi_ap:
++        params["multi_ap"] = str(multi_ap)
++    hapd = hostapd.add_ap(apdev[0], params)
++
++    dev[0].connect("multi-ap", psk="12345678", scan_freq="2412",
++                   multi_ap_backhaul_sta="1", wait_connect=wait_connect)
++
+ def test_multi_ap_association(dev, apdev):
+     """Multi-AP association in backhaul BSS"""
+     run_multi_ap_association(dev, apdev, 1)
+@@ -28,21 +37,9 @@ def test_multi_ap_association_shared_bss
+     run_multi_ap_association(dev, apdev, 3)
+     dev[1].connect("multi-ap", psk="12345678", scan_freq="2412")
+ 
+-def run_multi_ap_association(dev, apdev, multi_ap):
+-    params = hostapd.wpa2_params(ssid="multi-ap", passphrase="12345678")
+-    params["multi_ap"] = str(multi_ap)
+-    hapd = hostapd.add_ap(apdev[0], params)
+-
+-    dev[0].connect("multi-ap", psk="12345678", multi_ap_backhaul_sta="1",
+-                   scan_freq="2412")
+-
+ def test_multi_ap_disabled_on_ap(dev, apdev):
+     """Multi-AP association attempt when disabled on AP"""
+-    params = hostapd.wpa2_params(ssid="multi-ap", passphrase="12345678")
+-    hapd = hostapd.add_ap(apdev[0], params)
+-
+-    dev[0].connect("multi-ap", psk="12345678", multi_ap_backhaul_sta="1",
+-                   scan_freq="2412", wait_connect=False)
++    run_multi_ap_association(dev, apdev, 0, wait_connect=False)
+     ev = dev[0].wait_event([ "CTRL-EVENT-DISCONNECTED",
+                              "CTRL-EVENT-CONNECTED" ],
+                            timeout=5)
+@@ -54,12 +51,7 @@ def test_multi_ap_disabled_on_ap(dev, ap
+ 
+ def test_multi_ap_fronthaul_on_ap(dev, apdev):
+     """Multi-AP association attempt when only fronthaul BSS on AP"""
+-    params = hostapd.wpa2_params(ssid="multi-ap", passphrase="12345678")
+-    params["multi_ap"] = "2"
+-    hapd = hostapd.add_ap(apdev[0], params)
+-
+-    dev[0].connect("multi-ap", psk="12345678", multi_ap_backhaul_sta="1",
+-                   scan_freq="2412", wait_connect=False)
++    run_multi_ap_association(dev, apdev, 2, wait_connect=False)
+     ev = dev[0].wait_event([ "CTRL-EVENT-DISCONNECTED",
+                              "CTRL-EVENT-CONNECTED",
+                              "CTRL-EVENT-ASSOC-REJECT" ],