Values in /proc/net/wireless to dBm

bgcode · 02-16-2005

Hello,
For my university project i must do a wifi monitoring software under Linux.
All is good,but i don't know how to convert the Values in /proc/net/wireless to dBm,like NetStumbler.
If someone can tell me the algorithm,or the operations,
Thank's a lot !

KoreK · 02-16-2005

Quote:

Originally Posted by bgcode

Hello,
For my university project i must do a wifi monitoring software under Linux.
All is good,but i don't know how to convert the Values in /proc/net/wireless to dBm,like NetStumbler.
If someone can tell me the algorithm,or the operations,
Thank's a lot !

Get card chipset, read kernel code/doc. Might have a look at iwconfig source as well.

streaker69 · 02-16-2005

If it's your project, shouldn't you be doing the work and research? Asking people on a forum to do it for you doesn't really cut it, does it?

bgcode · 02-17-2005

#define LOG10_MAGIC 1.25892541179

int convert(int in)
{
/* Version without libm : slower */
double fin = (double) in;
int res = 0;

/* Split integral and floating part to avoid accumulating rounding errors */
while(fin > 10.0)
{
res += 10;
fin /= 10.0;
}
while(fin > 1.000001) /* Eliminate rounding errors, take ceil */
{
res += 1;
fin /= LOG10_MAGIC;
}

return(res);
}

this program don't run !
Ex:
it can run , but i don't know what the values in /proc/net/wireless represent ?
Are they W,mW,A,µW,dB,mV,W,MW,$,€.... ?
I don't find on Internet what the values in /proc/net/wireless represent !
If someone can help me ,i have no docs and i can't work.
Thanks

02-16-2005	#1 (permalink)
bgcode Registered Member Join Date: Feb 2005 Posts: 2	Values in /proc/net/wireless to dBm Hello, For my university project i must do a wifi monitoring software under Linux. All is good,but i don't know how to convert the Values in /proc/net/wireless to dBm,like NetStumbler. If someone can tell me the algorithm,or the operations, Thank's a lot !

02-16-2005	#3 (permalink)
streaker69 Psychic Amish Stumbler Join Date: Jul 2004 Location: Virginville, BlueBall, Bird In Hand, Intercourse, Paradise, PA Posts: 11,839	If it's your project, shouldn't you be doing the work and research? Asking people on a forum to do it for you doesn't really cut it, does it? __________________ "One of these days, I'm going to cut you to pieces." If you're offended by this post, please feel free to report it to one of the many helpful moderators of this forum. Thank you.

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02-17-2005	#4 (permalink)
bgcode Registered Member Join Date: Feb 2005 Posts: 2	#define LOG10_MAGIC 1.25892541179 int convert(int in) { /* Version without libm : slower / double fin = (double) in; int res = 0; / Split integral and floating part to avoid accumulating rounding errors / while(fin > 10.0) { res += 10; fin /= 10.0; } while(fin > 1.000001) / Eliminate rounding errors, take ceil */ { res += 1; fin /= LOG10_MAGIC; } return(res); } this program don't run ! Ex: it can run , but i don't know what the values in /proc/net/wireless represent ? Are they W,mW,A,µW,dB,mV,W,MW,$,€.... ? I don't find on Internet what the values in /proc/net/wireless represent ! If someone can help me ,i have no docs and i can't work. Thanks