[Winpcap-users] why pcap_findalldevs run about 30 seconds

[工商银行]

Gianluca and Bryan
Thanks for your help.
Thanks .
                    micheal


2007/12/11, Bryan Kadzban <bryan at kadzban.is-a-geek.net>:
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> 工商银行 wrote:
> > Can I speed up npf and nm service ?
>
> Nope.  nm is written by Microsoft, and npf is the kernel-mode half of
> WinPcap.  You can't really change either of them.
>
> (Plus your problem isn't that those drivers start slowly.  Your problem
> is -- or at least, I think your problem is -- that you have two services
> / drivers (they're the same in windows) trying to start at the same
> time.  This is illegal, and causes a very long wait before the second
> (nested) start command ends up timing out.  I think that's the delay
> that you're seeing.)
>
> > Or set to start these service after windows display login dialog as
> > fast as possible?
>
> You don't want to do what you're asking here.  You need npf and nm to be
> started *before* your service starts, and your service starts before the
> desktop comes up (because all services do).
>
> The dependency is the only guaranteed way to get another service (or
> driver) to start before your service, but the following also works on XP
> SP2 (it may change with SP3, and it may not work in Vista):
>
> Bring up device manager.  Go into the view menu and find the "show
> hidden devices" option -- turn it on.  Then expand the "non plug and
> play drivers" node in the tree, and bring up the properties on the
> "network monitor" item.  One of the tabs in the property sheet dialog
> will have options for when the driver should start, and it's probably
> set to "Demand".  Set it to either "automatic" or "system"; system runs
> before auto.  Then hit OK, and go find the "NetGroup Packet Filter"
> driver: do the same thing to it (set it to either auto or system).
>
> If you set both of them to system and that still doesn't help, then
> something else is wrong -- go set everything back (including the
> dependencies that you set on nm and npf) and hope somebody else has some
> other ideas.  Because unfortunately, I don't...
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