all: integrate with mac80211_hwsim

Two virtual wireless devices are instantiated during network devices
initialization.

A new flag (-wifi) is added that controls whether these virtual wifi
devices are instantiated and configured during proc initialization.

Also, two new pseudo syscalls are added:
1. syz_80211_inject_frame(mac_addr, packet, packet_len) -- injects an
arbitrary packet into the wireless stack. It is injected as if it
originated from the device identitied by mac_addr.
2. syz_80211_join_ibss(interface_name, ssid, ssid_len, mode) --
puts a specific network interface into IBSS state and joins an IBSS
network.

Arguments of syz_80211_join_ibss:
1) interface_name -- null-terminated string that identifies
a wireless interface
2) ssid, ssid_len -- SSID of an IBSS network to join to
3) mode -- mode of syz_80211_join_ibss operation (see below)

Modes of operation:
JOIN_IBSS_NO_SCAN (0x0) -- channel scan is not performed and
syz_80211_join_ibss waits until the interface reaches IF_OPER_UP.
JOIN_IBSS_BG_SCAN (0x1) -- channel scan is performed (takes ~ 9
seconds), syz_80211_join_ibss does not await IF_OPER_UP.
JOIN_IBSS_BG_NO_SCAN (0x2) -- channel scan is not performed,
syz_80211_join_ibss does not await IF_OPER_UP.

Local testing ensured that these syscalls are indeed able to set up an
operating network and inject packets into mac80211.

1 files changed, 9 insertions, 0 deletions

diff --git a/sys/linux/test/80211_ibss b/sys/linux/test/80211_ibss
new file mode 100644
index 000000000..0bea2f5f8
--- /dev/null
+++ b/sys/linux/test/80211_ibss
@@ -0,0 +1,9 @@
+# requires: -sandbox=namespace
+
+# Join IBSSS network
+
+syz_80211_join_ibss(&AUTO='wlan0\x00', &AUTO=@default_ibss_ssid, 0x6, 0x0)
+
+# Inject an arbitrary packet
+
+syz_80211_inject_frame(&AUTO=@device_a, &AUTO="00112233445566778899", 0xa)
\ No newline at end of file