Disassociation support...

Raghavendra. S raghavendra.akkasali at gmail.com
Wed Dec 12 10:43:02 EST 2007


Hi Dan,

 My doubts are inline..

On 12/12/07, Dan Williams <dcbw at redhat.com> wrote:
> On Wed, 2007-12-12 at 06:03 +0530, Raghavendra. S wrote:
> > Hi,
> >     My requirement is something like this...let me explain with small
> > piece of code.
> >
> > int main()
> > {
> >      printf("1- scan\n
> >                 2 - enable esecurity\n
> >                 3 - disable security\n
> >                 4 - edit config\n");
> >
> >     //after taking input from user - say 'choice'
> >
> >   switch(choice)
> > {
> >
> > case SCAN:
> >                  // here i want to scan using wpa supplicant. and get result.
> >                 break;
> >
> > case EDIT_CONFIG:
> >                 // user will enter inputs after seeing scan result and
> > then i will configure wpa_supplicant.conf as per users requirement.
> >                 break;
> >
> > case ENABLE_SECURITY:
> >              // here i will enable supplicant. as below
> >             system("./wpa_supplicant -c ./wpa_supplicant.conf");
> > //assume I will enable successfully with required command line
> > parameter.
> >             //if successfully enabled i will work here...say getting
> > ip...ping etc..
> >              break;
> >
> > case DISABLE_SECURITY:
> >             //here i should disable to do that...
> >             // I have to disassociate first.
> >             // then i will kill wpa supplicant.
> >     break;
> >
> > }
> >
> > return 0;
> > }
> >
> > My code will look as above. I would like to understand following things here.
> >
> >  1. for scanning - I will modify wpa supplicant code to take command
> > line argument say  '-s' which indicates enable wpa supplicant only to
> > scan. so I will enable wpa supplicant like this,
> > system("./wpa_supplicant   -s  -c ./dummy_wpa_supplicant.conf"). I
> > think using this I will get scan result. Let me know if there's any
> > better approach. My objective here is to get scan result and i should
> > fill this scan result in some structure.
>
> Yes, there is.  Take the scanning code in driver_wext.c, and put it into
> the same file in which your main.c is.  Do the scanning from _your_
> program.  You don't need wpa_supplicant running to scan.
>
> Or, talk to wpa_supplicant over the control socket.


[Raghu]: Here I think first I should initialize driver using
             void * wpa_driver_wext_init(void *ctx, const char *ifname)

             Here whether "ctx" stands for some callbackname?  I mean,
whether I have to pass some callback above init function or just
passing NULL will be fine.

              after this i will call scan function
              int wpa_driver_wext_scan(void *priv, const u8 *ssid,
size_t ssid_len)
               where priv is value returned by init call rt?


>
> > 2. For disable security. - First I will disassociate. problem here is
> > how i will get control on socket opened by wpa_supplicant, to
> > disassociate it? If I able to to that then...my problem is solved.
> > After this I will simply kill wpa supplicant.
>
> You specify the control interface in the config file you pass to the
> supplicant.

[Raghu]: Here if I mention say crtl_interface=/var/run/wpa_supplicant
and if I enable wpa supplicant on "eth0", I can see some control
socket in  "/var/run/wpa_supplicant/eth0" right? I observed that
wpa_cli uses socket to talk with these control socket "eth0". Is there
any simpler way to issue "disassociate" command to control socket...I
mean some other IPC mechanism.


> Dan
>
> > I am not planning to use, wpa_cli.
> >
> > -Raghu.
> >
> > On 12/11/07, Jouni Malinen <j at w1.fi> wrote:
> > > On Tue, Dec 11, 2007 at 06:51:01AM +0530, Raghavendra. S wrote:
> > >
> > > >     In below mailing list link you have mentioned that wpa supplicant
> > > > snapshot version has provided command to disassociate.
> > > >
> > > >     http://lists.shmoo.com/pipermail/hostap/2003-November/004852.html
> > >
> > > That message has nothing to do with wpa_supplicant (it was about the
> > > Host AP driver).
> > >
> > > >    I downloaded snapshot 0.6.0. But could not find command for
> > > > disassociation. Will you plz tell me where can I get wpa supplicant code
> > > > that supports disassociation command.
> > >
> > > What exactly do you mean with "disassociation command"? Would 'wpa_cli
> > > disconnect' meet your needs?
> > >
> > > --
> > > Jouni Malinen                                            PGP id EFC895FA
> > > _______________________________________________
> > > HostAP mailing list
> > > HostAP at shmoo.com
> > > http://lists.shmoo.com/mailman/listinfo/hostap
> > >
> >
> >
> >
>
>


-- 
Regards & Thanks
Raghavendra. S



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