From 41d5020151d21ff0609a4c4173ef2a8ae41f754d Mon Sep 17 00:00:00 2001 From: rpm-build Date: Tue, 9 May 2017 10:17:42 +0200 Subject: [PATCH 12/13] Make default capture buffer size bigger. --- tcpdump.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/tcpdump.c b/tcpdump.c index d7b094b..a54a42c 100644 --- a/tcpdump.c +++ b/tcpdump.c @@ -130,6 +130,7 @@ The Regents of the University of California. All rights reserved.\n"; #endif static int Bflag; /* buffer size */ +#define DEFAULT_CAPTURE_BUFFER_SIZE 4*1024*1024 static long Cflag; /* rotate dump files after this many bytes */ static int Cflag_count; /* Keep track of which file number we're writing */ static int Dflag; /* list available devices and exit */ @@ -1011,7 +1012,13 @@ open_interface(const char *device, netdissect_options *ndo, char *ebuf) if (status != 0) error("%s: Can't set buffer size: %s", device, pcap_statustostr(status)); - } + } else { + Bflag = DEFAULT_CAPTURE_BUFFER_SIZE; + status = pcap_set_buffer_size(pc, Bflag); + if (status != 0) + fprintf(stderr, "Can't set buffer size to %d, using system default.\n", DEFAULT_CAPTURE_BUFFER_SIZE); + } + #ifdef HAVE_PCAP_SET_TSTAMP_TYPE if (jflag != -1) { status = pcap_set_tstamp_type(pc, jflag); -- 2.13.5