Date: Wed, 16 Sep 2015 00:43:35 -0500 From: Matthew Grooms <mgrooms@shrew.net> To: freebsd-wireless@freebsd.org Subject: urtwn and hostap Message-ID: <55F90187.10809@shrew.net>
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This is a multi-part message in MIME format. --------------020602080509020909060107 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Hey wireless folks, I wanted to setup a Raspberry Pi as a FreeBSD AP and purchased a picked up a few Edimax 802.11 adapters to play with. Unfortunately these aren't supported in hostap mode. As it turns out these Edimax adapters use the RTL8188CUS chipset so I poked around the net and noticed that Linux does support the host AP feature with it's RTL8188CUS driver. I was also able to find a patch for OpenBSD that added support for the RTL8188EU chipset to the urtwn driver ... http://marc.info/?l=openbsd-tech&m=143577648117514&w=2 So I ordered one of these which arrived from China a few weeks later ... http://www.amazon.com/gp/product/B00L28AN88?psc=1&redirect=true&ref_=oh_aui_detailpage_o05_s00 Next I took a stab at porting the patch to FreeBSD. With the attached patch applied, I was able to setup a wlan0 device with the hostap feature. After bridging it with the LAN I could associate with my android phone, obtain an IP address via DHCP, browse a few web pages and watch all the packets pass through the bridge. Sadly, when I attempted to destroy the wlan0 device I got a kernel panic. The screenshot for that is also attached and I'm not sure if I'm going to be able to figure this one out without some help. I'm pretty out of my element here. I assume it's happening in ieee80211_free_node() when IEEE80211_NODE_LOCK() is called. To be clear, the crash only occurs when the adapter is configured in hostap mode with the patch applied. Anyone have any suggestions as to what I should be looking at to prevent this crash? If I can get this working for the RTL8188EU, I'll also take a stab at getting the RTL8188CUS chipset working in hostap mode. That is, assuming I can glean enough info from drivers that support this feature on other open source platforms. It appears to be extremely popular with the Raspberry PI crowd ... http://www.amazon.com/Edimax-EW-7811Un-150Mbps-Raspberry-Supports/dp/B003MTTJOY Thanks in advance, -Matthew --------------020602080509020909060107 Content-Type: text/plain; charset=UTF-8; name="urtwn.diff" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="urtwn.diff" SW5kZXg6IGRldi91c2Ivd2xhbi9pZl91cnR3bi5jCj09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0KLS0tIGRldi91 c2Ivd2xhbi9pZl91cnR3bi5jCShyZXZpc2lvbiAyODczNDIpCisrKyBkZXYvdXNiL3dsYW4v aWZfdXJ0d24uYwkod29ya2luZyBjb3B5KQpAQCAtMTgxLDYgKzE4MSw4IEBACiBzdGF0aWMg c3RydWN0IG1idWYgKgl1cnR3bl9yeGVvZihzdHJ1Y3QgdXNiX3hmZXIgKiwgc3RydWN0IHVy dHduX2RhdGEgKiwKIAkJCSAgICBpbnQgKiwgaW50OF90ICopOwogc3RhdGljIHZvaWQJCXVy dHduX3R4ZW9mKHN0cnVjdCB1c2JfeGZlciAqLCBzdHJ1Y3QgdXJ0d25fZGF0YSAqKTsKK2lu dAkJCXVydHduX3R4YmNuKHN0cnVjdCBpZWVlODAyMTF2YXAgKnZhcCwKKwkJCSAgICBzdHJ1 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