tcpdump mailing list archives
Re: libpcap & poll()
From: Eloy Paris <peloy () chapus net>
Date: Fri, 14 Nov 2008 14:03:22 -0500
Hi Gianluca, On Fri, Nov 14, 2008 at 08:06:10AM -0800, Gianluca Varenni wrote:
Windows has select() but it is my understanding that you can't use it on a packet capture descriptor. At least pcap_get_selectable_fd() is not available on Windows, according to the pcap man page.True, select() on windows basically works on sockets only. The reason is that while on the various unix flavors select is a system call, on Windows it's a shim over the native WaitForSingleObject/WaitForMultipleObjects (as much as file descriptors are a shim over the native HANDLEs). The Windows folks decided to create this select shim over sockets, only. On Windows, you cannot get a selectable file descriptor to make a select() on, but you can call pcap_gethandle() and use WaitForSingleObject/WaitForMultipleObjects on it. In particular you can wait on multiple pcap_t handles by getting a waitable handle on each of them and then calling "WaitForMultipleObjects" on them. Hope it helps
This is very helpful; thanks for the info! It seems like there is hope for a Windows port of my application ;-) Cheers, Eloy Paris.- netexpect.org - This is the tcpdump-workers list. Visit https://cod.sandelman.ca/ to unsubscribe.
Current thread:
- libpcap & poll() Aaron Turner (Nov 13)
- Re: libpcap & poll() Ben Greear (Nov 13)
- Re: libpcap & poll() Aaron Turner (Nov 13)
- Re: libpcap & poll() Ben Greear (Nov 13)
- Re: libpcap & poll() Eloy Paris (Nov 13)
- Re: libpcap & poll() Ben Greear (Nov 13)
- Re: libpcap & poll() Gianluca Varenni (Nov 14)
- Re: libpcap & poll() Eloy Paris (Nov 14)
- Re: libpcap & poll() Aaron Turner (Nov 13)
- Re: libpcap & poll() Ben Greear (Nov 13)
- Re: libpcap & poll() Eloy Paris (Nov 13)
- Re: libpcap & poll() Aaron Turner (Nov 13)
- Re: libpcap & poll() Ben Greear (Nov 13)
- Re: libpcap & poll() Aaron Turner (Nov 13)
- Re: libpcap & poll() Ben Greear (Nov 13)
- Re: libpcap & poll() Aaron Turner (Nov 13)
- Re: libpcap & poll() Aaron Turner (Nov 13)
- Re: libpcap & poll() Gianluca Varenni (Nov 14)
- Re: libpcap & poll() Ben Greear (Nov 14)