feat: wi-fi - expand support and fix issues, add GUI components

tests/wifi/ap_mlme.py

@@ -633,6 +633,64 @@ check(link_rm is not None and mac_rm is not None and link_rm < mac_rm,
       "the link is removed before the MAC that owns it")
 d7.p.stdin.close()
 
+# =============================================================================
+# An access point that stops acknowledging brings the link down.
+#
+# IwxLinkUp() used to be nothing but "the state machine reached Connected", and
+# only an explicit deauthentication frame moved it off that state.  A hotspot
+# that simply went away -- slept, changed channel, dropped the station without
+# saying so -- therefore left the link reported as up forever: NetIf kept
+# choosing wlan0, every packet vanished, and the desktop showed a healthy
+# connection while nothing worked.  Beacons cannot be used to notice this
+# (MacConfigCmd stops asking for them once associated), so the driver watches
+# its own frames going unacknowledged instead.
+# =============================================================================
+
+print("\n=== a silent access point takes the link down ===")
+d8 = Driver()
+d8.cmd("MAC " + STA.hex())
+d8.cmd(f"CONNECT {AP.hex()} {CHANNEL} 0 OpenNet - -")
+d8.cmd("RXMGMT " + mgmt(0xb0, STA, AP, AP, struct.pack('<HHH', 0, 2, 0)).hex())
+d8.cmd("SERVICE")
+d8.cmd("RXMGMT " + mgmt(0x10, STA, AP, AP,
+                        struct.pack('<HHH', 0x0421, 0, 7 | 0xc000)).hex())
+ev = d8.cmd("SERVICE")
+check(link_of(ev['result']) == 1, "the open network is associated and the link is up")
+
+# Well short of the threshold: a few unacknowledged frames are ordinary.
+ev = d8.cmd("TXSTATUS 0 15")
+check(link_of(ev['result']) == 1,
+      "a handful of unacknowledged frames does not drop the link")
+ev = d8.cmd("SERVICE")
+check(link_of(ev['result']) == 1, "and the service pass leaves it alone")
+
+# One acknowledgement means the access point is still there; the count restarts.
+d8.cmd("TXSTATUS 1 1")
+ev = d8.cmd("TXSTATUS 0 15")
+check(link_of(ev['result']) == 1,
+      "an acknowledgement in between restarts the count")
+
+# Anything received from the BSS is equally good proof, and also restarts it.
+d8.cmd("RXDATA " + data_from_ds(STA, AP, AP, 0x0800, b'\x45' * 20).hex())
+ev = d8.cmd("TXSTATUS 0 15")
+check(link_of(ev['result']) == 1,
+      "a frame received from the BSS restarts the count too")
+
+# Now let it run past the threshold with nothing coming back.
+ev = d8.cmd("TXSTATUS 0 16")
+check(link_of(ev['result']) == 1,
+      "the transmit path itself does not tear anything down")
+check(not ev['CMD'],
+      "no firmware command is sent from the completion path")
+
+ev = d8.cmd("SERVICE")
+check(state_of(ev['result']) == 0 and link_of(ev['result']) == 0,
+      "the next service pass drops the link")
+check(any(c == MAC_CONFIG and struct.unpack_from('<I', p, 4)[0] == 3
+          for c, p in ev['CMD']),
+      "and unwinds the firmware contexts")
+d8.p.stdin.close()
+
 print()
 if fails:
     for f in fails: print("FAILURE:", f)