tcpdump mailing list archives
Pcap with multiple processes
From: Anuradha Ratnaweera <ARatnaweera () virtusa com>
Date: Tue, 11 Feb 2003 10:04:47 +0600
I have a multi-process applicataion which fork()s after a pcap_open_live() (something similar to Apache 1.3). It works fine, but I wonder if things at kernel space still runs single threaded, thus becoming a bottleneck. Here is a simplified version of the code. Error handling not shown. handle = pcap_open_live(interface_name, snaplen, 1, 0, errbuf)); for (i = 0; i < num_children; i++) if ((pid = fork() == 0)) break; /* Parent exits. */ if (pid) return 0; pcap_loop(handle, 0, got_packet, NULL); The question is, when the event handler got_packet() of one process is running, can pcap_loop() of _another_ process call _its_ got_packet()? Thanks in advance. Anuradha -- Debian GNU/Linux (kernel 2.4.21-pre4) One cannot make an omelette without breaking eggs -- but it is amazing how many eggs one can break without making a decent omelette. -- Professor Charles P. Issawi - This is the TCPDUMP workers list. It is archived at http://www.tcpdump.org/lists/workers/index.html To unsubscribe use mailto:tcpdump-workers-request () tcpdump org?body=unsubscribe
Current thread:
- Pcap with multiple processes Anuradha Ratnaweera (Feb 10)