Date: Wed, 28 Mar 2012 16:33:17 -0400 From: Brandon Falk <bfalk_bsd@brandonfa.lk> To: "Chris.H" <bsd.chris@yahoo.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Reverse engineering; How to... Message-ID: <4F73758D.3040000@brandonfa.lk> In-Reply-To: <942975b7-aa54-416d-b049-a50563bbf2a7@email.android.com> References: <942975b7-aa54-416d-b049-a50563bbf2a7@email.android.com>
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Reverse engineering a whole driver could take a very long time, even with the proper tools. If it's possible, return the adapter, and buy a new one and verify that the chipset is supported before you buy it. Last time I bought a wireless card I sat in the store looking at the Wireless support list for BSD before buying. http://www.freebsd.org/relnotes/CURRENT/hardware/support.html#WLAN I very strongly suggest that you get a card with an Atheros chipset, as those are by far the best supported on BSD. -Brandon On 3/28/2012 4:22 PM, Chris.H wrote: > Greetings, > Over the past year, in an effort to convert my server farm to wireless, I've purchased some half a dozen USB wireless dongles, at a total cost of ~150.00. Unfortunately, none of them are (yet) supported — I know, I know, I've already had this debate with both dev's, & users. On the up-side, I've devised a resource that will greatly assist would-be adopters in selecting, and researching these, and other adapters _currently supported_ under under FreeBSD. That said; the adapter I most recently purchased, is quite nice (Cisco(Linksys) AE2500 Wireless-N). > Boasts 2.5/5GHz @300Mbps. I figured (wrongly) because Linksys is so well supported on FreeBSD, that the likelihood of this being supported would be good. At any rate, given it's not, and because I _do_ have the Window$ drivers on the install CD. What are the possibilities I can reverse-engineer the drivers into a FreeBSD loadable module? > I can unpack the setup file to extract the .sys files. While I _could_ utilize the ndisulator to load them, that's not my goal. Should I unpack the .sys file, and attempt to decompile/disassemble it? Or attempt to load it, and dump it from memory? > — hacker/cracker advice _strongly_ desired — > > ############## > #usbconfig -d ugen1.2 dump_device_desc > ugen1.2: <Linksys AE2500 Cisco> at usbus1, cfg=0 md=HOST spd=HIGH (480Mbps) pwr=ON > bLength = 0x0012 > bDescriptorType = 0x0001 > bcdUSB = 0x0200 > bDeviceClass = 0x00ff > bDeviceSubClass = 0x0000 > bDeviceProtocol = 0x0000 > bMaxPacketSize0 = 0x0040 > idVendor = 0x13b1 > idProduct = 0x003a > bcdDevice = 0x0001 > iManufacturer = 0x0001 <Cisco> > iProduct = 0x0002 <Linksys AE2500> > iSerialNumber = 0x0003 <000000000001> > bNumConfigurations = 0x0001 > ############## > > P.S. This message was sent from my "smart phone". > Apologies for any (mis)formatting. :-( > > --Chris.H >
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