Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
branch: master

Merge remote-tracking branch 'goog/master' into update_tcpdump

* goog/master:
  Get libpcap 1.5.2+ to compile on Android.
  Merge remote-tracking branch 'goog/tcpdump'
latest commit 9dab0cd743
JP Abgrall authored
Octocat-spinner-32 ChmodBPF Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 SUNOS4 Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 Win32 Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 bpf Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 doc auto import from //depot/cupcake/@135843 March 03, 2009
Octocat-spinner-32 lbl Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 missing Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 msdos Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 packaging Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 tests Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 .gitignore Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 .travis.yml Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 Android.mk Get libpcap 1.5.2+ to compile on Android. February 12, 2014
Octocat-spinner-32 CHANGES Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 CREDITS Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 CleanSpec.mk Get libpcap 1.5.2+ to compile on Android. February 12, 2014
Octocat-spinner-32 INSTALL.txt Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 LICENSE auto import from //depot/cupcake/@135843 March 03, 2009
Octocat-spinner-32 Makefile-devel-adds Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 Makefile.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 README Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 README.Win32 Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 README.aix Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 README.dag Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 README.hpux Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 README.linux Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 README.macosx Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 README.septel Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 README.sita Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 README.tru64 Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 TODO Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 VERSION Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 aclocal.m4 Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 arcnet.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 atmuni31.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 bpf_dump.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 bpf_filter.c Get libpcap 1.5.2+ to compile on Android. February 12, 2014
Octocat-spinner-32 bpf_image.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 chmod_bpf Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 config.guess Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 config.h Get libpcap 1.5.2+ to compile on Android. February 12, 2014
Octocat-spinner-32 config.h.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 config.sub Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 configure Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 configure.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 dlpisubs.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 dlpisubs.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 etherent.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 ethertype.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 fad-getad.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 fad-gifc.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 fad-glifc.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 fad-null.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 fad-sita.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 fad-win32.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 gencode.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 gencode.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 grammar.c Get libpcap 1.5.2+ to compile on Android. February 12, 2014
Octocat-spinner-32 grammar.y Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 ieee80211.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 inet.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 install-sh auto import from //depot/cupcake/@135843 March 03, 2009
Octocat-spinner-32 llc.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 mkdep Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 nametoaddr.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 nlpid.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 optimize.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 org.tcpdump.chmod_bpf.plist Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-bpf.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-bpf.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-bt-linux.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-bt-linux.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-can-linux.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-can-linux.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-canusb-linux.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-canusb-linux.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-common.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-common.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-config.1 Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-config.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-dag.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-dag.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-dbus.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-dbus.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-dlpi.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-dos.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-dos.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-enet.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-filter.manmisc.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-int.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-libdlpi.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-linktype.manmisc.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-linux.c Get libpcap 1.5.2+ to compile on Android. February 12, 2014
Octocat-spinner-32 pcap-namedb.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-netfilter-linux.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-netfilter-linux.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-nit.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-null.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-pf.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-savefile.manfile.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-septel.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-septel.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-sita.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-sita.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-sita.html Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-snf.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-snf.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-snit.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-snoop.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-stdinc.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-tstamp.manmisc.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-usb-linux.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-usb-linux.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap-win32.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap.3pcap.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap1.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_activate.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_breakloop.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_can_set_rfmon.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_close.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_compile.3pcap.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_create.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_datalink.3pcap.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_datalink_name_to_val.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_datalink_val_to_name.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_dump.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_dump_close.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_dump_file.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_dump_flush.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_dump_ftell.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_dump_open.3pcap.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_file.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_fileno.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_findalldevs.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_freecode.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_get_selectable_fd.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_get_tstamp_precision.3pcap.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_geterr.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_inject.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_is_swapped.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_lib_version.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_list_datalinks.3pcap.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_list_tstamp_types.3pcap.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_lookupdev.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_lookupnet.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_loop.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_major_version.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_next_ex.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_offline_filter.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_open_dead.3pcap.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_open_live.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_open_offline.3pcap.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_set_buffer_size.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_set_datalink.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_set_immediate_mode.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_set_promisc.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_set_rfmon.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_set_snaplen.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_set_timeout.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_set_tstamp_precision.3pcap.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_set_tstamp_type.3pcap.in Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_setdirection.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_setfilter.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_setnonblock.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_snapshot.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_stats.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_statustostr.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_strerror.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_tstamp_type_name_to_val.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 pcap_tstamp_type_val_to_name.3pcap Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 ppp.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 runlex.sh Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 savefile.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 scanner.c Get libpcap 1.5.2+ to compile on Android. February 12, 2014
Octocat-spinner-32 scanner.h Get libpcap 1.5.2+ to compile on Android. February 12, 2014
Octocat-spinner-32 scanner.l Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 sf-pcap-ng.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 sf-pcap-ng.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 sf-pcap.c Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 sf-pcap.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 sunatmpos.h Merge remote-tracking branch 'goog/tcpdump' February 12, 2014
Octocat-spinner-32 tokdefs.h Get libpcap 1.5.2+ to compile on Android. February 12, 2014
Octocat-spinner-32 version.c Get libpcap 1.5.2+ to compile on Android. February 12, 2014
Octocat-spinner-32 version.h Get libpcap 1.5.2+ to compile on Android. February 12, 2014
README
@(#) $Header: /tcpdump/master/libpcap/README,v 1.34 2008-12-14 19:44:14 guy Exp $ (LBL)

LIBPCAP 1.x.y

www.tcpdump.org

Please send inquiries/comments/reports to:
	tcpdump-workers@lists.tcpdump.org

Anonymous Git is available via:
	git clone git://bpf.tcpdump.org/libpcap

Please submit patches by forking the branch on GitHub at

	http://github.com/the-tcpdump-group/libpcap/tree/master

and issuing a pull request.

formerly from 	Lawrence Berkeley National Laboratory
		Network Research Group <libpcap@ee.lbl.gov>
		ftp://ftp.ee.lbl.gov/old/libpcap-0.4a7.tar.Z

This directory contains source code for libpcap, a system-independent
interface for user-level packet capture.  libpcap provides a portable
framework for low-level network monitoring.  Applications include
network statistics collection, security monitoring, network debugging,
etc.  Since almost every system vendor provides a different interface
for packet capture, and since we've developed several tools that
require this functionality, we've created this system-independent API
to ease in porting and to alleviate the need for several
system-dependent packet capture modules in each application.

For some platforms there are README.{system} files that discuss issues
with the OS's interface for packet capture on those platforms, such as
how to enable support for that interface in the OS, if it's not built in
by default.

The libpcap interface supports a filtering mechanism based on the
architecture in the BSD packet filter.  BPF is described in the 1993
Winter Usenix paper ``The BSD Packet Filter: A New Architecture for
User-level Packet Capture''.  A compressed PostScript version can be
found at

	ftp://ftp.ee.lbl.gov/papers/bpf-usenix93.ps.Z

or

	http://www.tcpdump.org/papers/bpf-usenix93.ps.Z

and a gzipped version can be found at

	http://www.tcpdump.org/papers/bpf-usenix93.ps.gz

A PDF version can be found at

	http://www.tcpdump.org/papers/bpf-usenix93.pdf

Although most packet capture interfaces support in-kernel filtering,
libpcap utilizes in-kernel filtering only for the BPF interface.
On systems that don't have BPF, all packets are read into user-space
and the BPF filters are evaluated in the libpcap library, incurring
added overhead (especially, for selective filters).  Ideally, libpcap
would translate BPF filters into a filter program that is compatible
with the underlying kernel subsystem, but this is not yet implemented.

BPF is standard in 4.4BSD, BSD/OS, NetBSD, FreeBSD, OpenBSD, DragonFly
BSD, and Mac OS X; an older, modified and undocumented version is
standard in AIX.  {DEC OSF/1, Digital UNIX, Tru64 UNIX} uses the
packetfilter interface but has been extended to accept BPF filters
(which libpcap utilizes).  Also, you can add BPF filter support to
Ultrix using the kernel source and/or object patches available in:

	http://www.tcpdump.org/other/bpfext42.tar.Z

Linux, in the 2.2 kernel and later kernels, has a "Socket Filter"
mechanism that accepts BPF filters; see the README.linux file for
information on configuring that option.

Note to Linux distributions and *BSD systems that include libpcap:

There's now a rule to make a shared library, which should work on Linux 
and *BSD, among other platforms.

It sets the soname of the library to "libpcap.so.1"; this is what it 
should be, *NOT* libpcap.so.1.x or libpcap.so.1.x.y or something such as 
that.

We've been maintaining binary compatibility between libpcap releases for 
quite a while; there's no reason to tie a binary linked with libpcap to 
a particular release of libpcap.

Problems, bugs, questions, desirable enhancements, etc. should be sent
to the address "tcpdump-workers@lists.tcpdump.org".  Bugs, support
requests, and feature requests may also be submitted on the GitHub issue
tracker for libpcap at

	https://github.com/the-tcpdump-group/libpcap/issues

Source code contributions, etc. should be sent to the email address
above or submitted by forking the branch on GitHub at

	http://github.com/the-tcpdump-group/libpcap/tree/master

and issuing a pull request.

Current versions can be found at www.tcpdump.org.

 - The TCPdump team
Something went wrong with that request. Please try again.