Hi I need help please

[veronica otero ogando]

Hello, I', Verónica Otero, i saw that you wrote on a forum long time ago about the subject, so I'm writting to you.  I am a student of computer engineering in Spain. 

 I'm trying to make a program in C roaming on mobile robotics technology for 802.11. 

 Basically what I need is to scan the AP's that are available in a range and
coverage. I need a little help because I dont kwnow how to scan de AP's in C. I'm implementing a little program, but I have an error, because I'm lookin the iwlist.c code and it code include a call to "ioctl(SIOCIWAPLIST)" to know the number of AP's availables, but in my structure I cant use this option because this call always return " 0 ".
I have a dell computer inspiron 640m with a wifi chipset Intel 3945AVG and I'm using wirelles tools  27  but  I can't do "iwlist wlan0 ap" because it is not suported. I also have an error with "iwspy" I dont know how can I do.
Please if you can help me I'll be very glad, I'm beeing ashamed becaus I have to do this and I dont have enougth time. Pleas help me 
 
 
ATTM: Verónica Otero   


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