| 1 |
-----BEGIN PGP SIGNED MESSAGE----- |
| 2 |
Hash: SHA1 |
| 3 |
|
| 4 |
Meino Christian Cramer wrote: |
| 5 |
|
| 6 |
> But in my case I have to avoid *ANY* timeouts (wayting for an answer |
| 7 |
> or another timeout for example: the timeout of "gethostbyname()") if |
| 8 |
> possible. My program has to react AS FAST AS POSSIBLE on error |
| 9 |
> conditions. So if I can check the availability of a net-connection |
| 10 |
> without actually accessing the net and wait for an answer (or an error |
| 11 |
> condition) it would be the best solution. The fact that I am urged to |
| 12 |
> use UDP makes things even more difficult. I know that simply |
| 13 |
> attaching the computer to a switch/hub and removing the net-plug there |
| 14 |
> makes the link check worthless ... but I want to try every possibility |
| 15 |
> to find out, whether there is the chance to contact the "target" |
| 16 |
> (wrong word...sorry) without trying exactly that (or similiar), |
| 17 |
> haveing to wait for an answer (or error condition) and paying the |
| 18 |
> panalty of timeouts then. |
| 19 |
> |
| 20 |
> If there is any net-programming hyper-guru out there who knows some |
| 21 |
> special tricks to achieve the shortest possible time of |
| 22 |
> reaction...here is someone who will thank her/him very much for any |
| 23 |
> help in advance ! :) |
| 24 |
|
| 25 |
This is probably not suitable (as it may take a couple of seconds to |
| 26 |
register a change of status) but would greping for 'inet addr:' in ifconfig |
| 27 |
eth0 do? |
| 28 |
- -- |
| 29 |
Regards, |
| 30 |
Mick |
| 31 |
-----BEGIN PGP SIGNATURE----- |
| 32 |
Version: GnuPG v1.4.5 (GNU/Linux) |
| 33 |
|
| 34 |
iD8DBQFFH/hY5Fp0QerLYPcRAnrwAJ9iZhFaUV2SLyYRxvmBteRGnbTBrQCeMa+9 |
| 35 |
3ykTpKtqG2PC4hQn06mD2r8= |
| 36 |
=NXSt |
| 37 |
-----END PGP SIGNATURE----- |
| 38 |
|
| 39 |
-- |
| 40 |
gentoo-user@g.o mailing list |
Archives