README
RFC-5415 and RFC-5416 compliant CAPWAP WTP implementation.
This project started as a fork of SmartCAPWAP, but has since dropped the AC part on focuses on WTP functionality only (hence the new name).
STATUS
WTP tested and working features:
- 802.11b
- 802.11g
- 802.11a
- WMM/WME (mostly)
- Local MAC
- single radio, single WLAN mode
- 802.11n (draft-ietf-opsawg-capwap-extension-06)
- WPA2-PSK
- WPA2 Enterprise
Only cards with cfg80211 netlink API are supported. The following devices have been tested:
- Atheros AR9280 (Compex WLE200NX)
- Mediatek MT7602E, MT7612E (ZBT WG2626, ALL-WR1200AC_WRT)
Planned WTP features:
- 802.11r - BSS fast transition
- Hybrid-MAC (RFC-7494)
INSTALLATION
Requirements
NOTE: To run WTP you must have a wireless card that has Linux driver based on the Generic IEEE 802.11 Networking Stack (mac80211).
- Linux 4.4 or newer
- automake 1.9 or newer
- autoconf
- libconfig-dev
- libnl-dev
- libev-dev
- libtool
- wolfssl 3.8 or newer
Build
Linux Kernel:
Apply the appropriate path from kernel-patches to your kernel, enable CAPWAP WTP support and rebuild you kernel.
WolfSSL:
./configure --enable-dtls --enable-ipv6 --enable-aesgcm \
--enable-aesccm --enable-aesni --enable-poly1305 \
--enable-ecc --enable-ecc25519 --enable-chacha \
--enable-supportedcurves --enable-dh --enable-psk \
--disable-des3 --disable-arc4 --prefix=/usr/
make
make install
FreeWTP:
autoreconf -f -i
./configure --disable-ac
make
make install
Debugging / Tracing
The wtp capwap kernel module defines a number of static ftrace events. For a detailed guide on how to use those, see: https://www.kernel.org/doc/Documentation/trace/ftrace.txt
A sample trace session might lock like this:
echo 1 > /sys/kernel/debug/tracing/events/capwap/enable
echo 1 > /sys/kernel/debug/tracing/tracing_on
cat /sys/kernel/debug/tracing/trace_pipe
<...>-890 [000] ...1 12030.725012: sc_capwap_create: session:9e04b10c75b3c6537da18d38da5bc70d
<...>-890 [000] ...1 12030.725048: sc_capwap_sendkeepalive: session:9e04b10c75b3c6537da18d38da5bc70d
<...>-890 [000] ...1 12030.725052: sc_capwap_createkeepalive: session:9e04b10c75b3c6537da18d38da5bc70d
<...>-890 [000] ...1 12030.725053: sc_capwap_send: session:9e04b10c75b3c6537da18d38da5bc70d
ksoftirqd/0-3 [000] ..s1 12030.727270: sc_capwap_parsingpacket: session:9e04b10c75b3c6537da18d38da5bc70d skb:ffff8802306c8900
wtp-890 [001] ...1 12060.764008: sc_capwap_sendkeepalive: session:9e04b10c75b3c6537da18d38da5bc70d
wtp-890 [001] ...1 12060.764530: sc_capwap_createkeepalive: session:9e04b10c75b3c6537da18d38da5bc70d
wtp-890 [001] ...1 12060.764637: sc_capwap_send: session:9e04b10c75b3c6537da18d38da5bc70d
<idle>-0 [000] ..s2 12060.787527: sc_capwap_parsingpacket: session:9e04b10c75b3c6537da18d38da5bc70d skb:ffff8800b8a85900
wtp-890 [001] ...1 12082.953847: sc_capwap_resetsession: session:9e04b10c75b3c6537da18d38da5bc70d
wtp-890 [001] ...1 12082.954005: sc_capwap_close: session:9e04b10c75b3c6537da18d38da5bc70d
wtp-890 [001] ...1 12082.954130: sc_capwap_freesession: session:9e04b10c75b3c6537da18d38da5bc70d