tcpdump mailing list archives
Re: Buffer size question
From: "Ed Maste" <emaste () sandvine com>
Date: Thu, 14 Oct 2004 14:29:14 -0400
I'll download one of the nightly tars and try out the environment variable idea.
Here's my simple patch to allow an environment variable PCAP_BUFSIZE to override the default initial buffer size. --- pcap-bpf.c Tue Oct 5 03:23:39 2004 +++ pcap-bpf.c.new Thu Oct 14 14:21:41 2004 @@ -578,6 +578,7 @@ u_int v; pcap_t *p; struct utsname osinfo; + char *cp; #ifdef HAVE_DAG_API if (strstr(device, "dag")) { @@ -626,6 +627,8 @@ */ if ((ioctl(fd, BIOCGBLEN, (caddr_t)&v) < 0) || v < 32768) v = 32768; + if ((cp = getenv("PCAP_BUFSIZE"))) + v = atoi(cp); for ( ; v != 0; v >>= 1) { /* Ignore the return value - this is because the call fails * on BPF systems that don't have kernel malloc. And if - This is the tcpdump-workers list. Visit https://lists.sandelman.ca/ to unsubscribe.
Current thread:
- Buffer size question Ed Maste (Oct 13)
- Re: Buffer size question Guy Harris (Oct 13)
- Re: Buffer size question Gianluca Varenni (Oct 14)
- Re: Buffer size question Guy Harris (Oct 14)
- Re: Buffer size question Gianluca Varenni (Oct 14)
- <Possible follow-ups>
- Re: Buffer size question Ed Maste (Oct 14)
- Re: Buffer size question Ed Maste (Oct 14)
- Re: Buffer size question Hannes Gredler (Oct 15)
- Re: Buffer size question Pekka Savola (Oct 15)
- Re: Buffer size question Guy Harris (Oct 15)
- Re: Buffer size question Hannes Gredler (Oct 15)
- Re: Buffer size question Ed Maste (Oct 15)
- Buffer size question Alexander Dupuy (Oct 18)
- Re: Buffer size question Guy Harris (Oct 18)
- Re: Buffer size question Ed Maste (Oct 18)
- Re: Buffer size question Guy Harris (Oct 18)
- Re: Buffer size question Guy Harris (Oct 13)