:: Re: [DNG] netman GIT project
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Συντάκτης: Edward Bartolo
Ημερομηνία:  
Προς: Steve Litt
Υ/ο: dng
Αντικείμενο: Re: [DNG] netman GIT project
Since, netman does not touch /etc/network/interfaces, the system
should still be able to connect using a wired connection to ethX.
Obviously, the interface has to be activated using ifup ethX.
Therefore, to use a wired connection, the backend should use
/etc/network/interfaces as an interfaces file are simply call "ifup
ethX". I think, there is no need to recreate another interfaces file
which is already there waiting to be used.

The contents of interfaces files created by backend are as follows,
but if necessary, we can create more than more template, although it
doesn't look it will be necessary.

Interfaces File Contents:

auto lo
iface lo inet loopback

iface wlan0 inet dhcp
    wpa-ssid EB-TP-LNK67
    wpa-psk "************"



The above connects to my WIFI. It is simple and always worked for
several years now.

On 25/08/2015, Irrwahn <irrwahn@???> wrote:
> On Tue, 25 Aug 2015 20:20:20 +0200 (CEST), Karl wrote:
>> Irrwahn:
>>> On Tue, 25 Aug 2015 19:24:17 +0200 (CEST), Karl wrote:
>>>> Tilt!:
>>>>> i wonder if we ever get to see such SSIDs from iwlist anyway -
>>>>> how is it supposed to print SSIDs that contain the zerobyte ...
>>>>
>>>> iwlib.c line 989..995:
>>>>       /* Is it a non-ASCII character ??? */
>>>>       if(isescape || !isascii(*s) || iscntrl(*s))
>>>>         {
>>>>           /* Escape */
>>>>           sprintf(d, "\\x%02X", *s);
>>>>           d += 4;
>>>>         }

>>>
>>> Thank you. One problem, though:
>>> Not a single version of the Wireless Tools for Linux sources I
>>> happened to stumble upon doing a quick internet search contains
>>> this snippet, or anything remotely like it. Care to share with us,
>>> where this originates?
>>
>> $ apt-get source wireless-tools
>> $ cd wireless-tools-30~pre9
>> $ ls iw*.[ch]
>> iwconfig.c iwevent.c iwgetid.c iwlib.c iwlib.h iwlib-private.h
>> iwlist.c iwmulticall.c iwpriv.c iwspy.c
>> $ grep download debian/copyright
>> It was downloaded from:
>> http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Tools.html
>> $
>>
>>
>> http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Tools.html
>> under "Wireless Tools latest versions":
>> ///
>> The main features of the latest beta is support for non-ASCII ESSIDs
>> (such as localised ESSID), support for displaying Scanning Capabilities,
>> slightly bigger scan buffer, fixing minor bug iwconfig parser and minor
>> enhancement to ifrename :
>>
>>     Wireless Tools version 30-pre9 (beta)
>> ///

>>
>>> Or give a little more context, particularly
>>> how isescape is set?
>>
>> iwlib.c line 971..981:
>>       /* Escape the escape to avoid ambiguity.
>>        * We do a fast path test for performance reason. Compiler will
>>        * optimise all that ;-) */
>>       if(*s == '\\')
>>         {
>>           /* Check if we would confuse it with an escape sequence */
>>           if((e-s) > 4 && (s[1] == 'x')
>>              && (isxdigit(s[2])) && (isxdigit(s[3])))
>>             {
>>               isescape = 1;
>>             }

>
> Thanks a lot, Karl! I was stupid enough to not simply apt-get the sources.
> I checked, it is exactly the function that is used when printing the scan
> results.
>
> That makes escaping for file system path purposes quite easy, as everything
> is already escaped, except the notorious '/'. however, that is already taken
> care of in my modified version of Ed's netman.
>
> Now, what about the consumers? I found out that wpa_supplicant can digest
> printf-style escaping, provided the quoted string is prefixed with 'P':
>
>   # ssid: SSID (mandatory); network name in one of the optional formats:
>   #    - an ASCII string with double quotation
>   #    - a hex string (two characters per octet of SSID)
>   #    - a printf-escaped ASCII string P"<escaped string>"

>
> I was not able to find information on how ifup passes on the information
> from the wpa-ssid field. Assuming it is just handed down as is, the only
> change in netman would be to prefix the SSID with 'P'.
>
> --
> Irrwahn
>
>
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