CHANGES   [plain text]

@(#) $Header: /tcpdump/master/libpcap/CHANGES,v 2008-10-28 00:27:42 ken Exp $ (LBL)

Mon.    October 27, 2008.  Summary for 1.0.0 libpcap release
	Compile with IPv6 support by default
	Compile with large file support on by default
	Add pcap-config script, which deals with -I/-L flags for compiling
	DLT: Add AX25 (AX.25 w/KISS header)
	802.15.4 support
	Variable length 802.11 header support
	X2E data type support 
	SITA ACN Interface support - see README.sita
	Support for zerocopy BPF on platforms that support it
	Better support for dealing with VLAN tagging/stripping on Linux
	Fix dynamic library support on OSX
	Return PCAP_ERROR_IFACE_NOT_UP if the interface isn't 'UP', so applications
	 can print better diagnostic information
	Return PCAP_ERROR_PERM_DENIED if we don't have permission to open a device, so
	 applications can tell the user they need to go play with permissions
	On Linux, ignore ENETDOWN so we can continue to capture packets if the 
	 interface goes down and comes back up again.
	On Linux, support new tpacket frame headers (2.6.27+)
	On Mac OS X, add scripts for changing permissions on /dev/pbf* and launchd plist
	On Solaris, support 'passive mode' on systems that support it
	Fixes to autoconf and general build environment
	Man page reorganization + cleanup
	Autogenerate VERSION numbers better

Mon.    September 10, 2007.  Summary for 0.9.8 libpcap release
        Change build process to put public libpcap headers into pcap subir
        DLT: Add value for IPMI IPMB packets
        DLT: Add value for u10 Networks boards
        Require <net/pfvar.h> for pf definitions - allows reading of pflog formatted 
         libpcap files on an OS other than where the file was generated

Wed.	April 25, 2007.  Summary for 0.9.6 libpcap release

	Put the public libpcap headers into a pcap subdirectory in both the
	 source directory and the target include directory, and have include
	 files at the top-level directory to include those headers, for 
	 backwards compatibility.
	Add Bluetooth support
	Add USB capturing support on Linux
	Add support for the binary USB sniffing interface in Linux
	Add support for new FreeBSD BIOCSDIRECTION ioctl
	Add additional filter operations for 802.11 frame types
	Add support for filtering on MTP2 frame types
	Propagate some changes from the main branch, so the x.9 branch has 
	 all the DLT_ and LINKTYPE_ values that the main branch does
	Reserved a DLT_ and SAVEFILE_ value for PPI (Per Packet Info) 
	 encapsulated packets
	Add LINKTYPE_ for IEEE 802.15.4, with address fields padded as done 
	 by Linux drivers
	Add LINKTYPE_ value corresponding to DLT_IEEE802_16_MAC_CPS.
	Add DLT for IEEE 802.16 (WiMAX) MAC Common Part Sublayer
	Add DLT for Bluetooth HCI UART transport layer
	When building a shared library, build with "-fPIC" on Linux to support x86_64
	Link with "$(CC) -shared" rather than "ld -shared" when building a 
	 ".so" shared library
	Add support for autoconf 2.60
	Fixes to discard unread packets when changing filters
	Changes to handle name changes in the DAG library resulting from 
	 switching to libtool.
	Add support for new DAG ERF types.
        Add an explicit "-ldag" when building the shared library, so the DAG 
	 library dependency is explicit.
	Mac OSX fixes for dealing with "wlt" devices
	Fixes in add_or_find_if() & pcap_findalldevs() to optimize generating
	 device lists
	Fixed a bug in pcap_open_live(). The return value of PacketSetHwFilter
	 was not checked. 

Tue.	September 19, 2006. Summary for 0.9.5 libpcap release

	Support for LAPD frames with vISDN
	Support for ERF on channelized T1/E1 cards via DAG API
	Fix capitalization that caused issues crossc compiling on Linux
	Better failure detection on PacketGetAdapterNames()
	Fixes for MPLS packet generation (link layer)
	OP_PACKET now matches the beginning of the packet, instead of
	Add DLT/LINKTYPE for carrying FRF.16 Multi-link Frame Relay
	Fix allocation of buffer for list of link-layer types  
	Added a new DLT and LINKTYPE value for ARINC 653 Interpartition Communcation Messages
	Fixed a typo in a DLT value: it should start with DLT_ and not LINKTYPE_
	Redefined DLT_CAN20B and LINKTYPE_CAN20B as #190 (as this is the right value for CAN).
	Added definition for DLT_A429 and LINKTYPE_A429 as #184.
	Added a new DLT and LINKTYPE value for CAN v2.0B frames.
	Add support for DLT_JUNIPER_VP.
	Don't double-count received packets on Linux systems that 
	 support the PACKET_STATISTICS getsockopt() argument on 
	 PF_PACKET sockets.
	Add support for DLT_IEEE802_11 and DLT_IEEE802_11_RADIO link 
	 layers in Windows
	Add support to build libpcap.lib and wpcap.dll under Cygnus and 

Mon. 	September 5, 2005. Summary for 0.9.4 libpcap release

	Support for radiotap on Linux (Mike Kershaw)
	Fixes for HP-UX
	Support for additional Juniper link-layer types
	Fixes for filters on MPLS-encapsulated packets
	"vlan" filter fixed
	"pppoed" and "pppoes" filters added; the latter modifies later
	parts of the filter expression to look at the PPP headers and
	headers in the PPP payload

Tue. 	July 5, 2005. Summary for 0.9.3 libpcap release

	Fixes for compiling on nearly every platform,
		including improved 64bit support
	MSDOS Support
	Add support for sending packets
	OpenBSD pf format support
	IrDA capture (Linux only)

Tue.   March 30, 2004. Summary for 3.8.3 release

	Fixed minor problem in gencode.c that would appear on 64-bit
	Version number is now sane.

Mon.   March 29, 2004. Summary for 3.8.2 release

	updates for autoconf 2.5
	fixes for ppp interfaces for freebsd 4.1
	pcap gencode can generate code for 802.11, IEEE1394, and pflog.

Wed.   November 12, 2003. Summary for 0.8 release

	added pcap_findalldevs()
	Win32 patches from NetGroup, Politecnico di Torino (Italy)
	OpenBSD pf, DLT_PFLOG added
	Many changes to ATM support.
	lookup pcap_lookupnet()
	Sigh.  More AIX wonderfulness.
	Document updates.
	Changes to API: pcap_next_ex(), pcap_breakloop(), pcap_dump_flush(),
			pcap_list_datalinks(), pcap_set_datalink(),
			pcap_lib_version(), pcap_datalink_val_to_name(),
			pcap_datalink_name_to_val(), new error returns.

Tuesday, February 25, 2003.  0.7.2 release

 	Support link types that use 802.2 always, never, and sometimes.
 	Don't decrease the size of the BPF buffer from the default.
 	Support frame relay.
 	Handle 32-bit timestamps in DLPI, and pass the right buffer size.
 	Handle Linux systems with modern kernel but without
 	 SOL_PACKET in the userland headers.
 	Linux support for ARPHRD_RAWHDLC.
 	Handle 32-bit timestamps in snoop.
 	Support eg (Octane/O2xxx/O3xxx Gigabit) devices.
 	Add new reserved DLT types.

Monday October 23, 2001. Summary for 0.7 release

	Added pcap_findalldevs() call to get list of interfaces in a MI way.

	pcap_stats() has been documented as to what its counters mean on
	each platform.

Tuesday January 9, 2001. Summary for 0.6 release

	New Linux libpcap implementation, which, in 2.2 and later
	kernels, uses PF_PACKET sockets and supports kernel packet
	filtering (if compiled into the kernel), and supports the "any"
	device for capturing on all interfaces.  Cleans up promiscuous
	mode better on pre-2.2 kernels, and has various other fixes
	(handles 2.4 ARPHRD_IEEE802_TR, handles ISDN devices better,
	doesn't show duplicate packets on loopback interface, etc.).

	Fixed HP-UX libpcap implementation to correctly get the PPA for
	an interface, to allow interfaces to be opened by interface name.

	libpcap savefiles have system-independent link-layer type values
	in the header, rather than sometimes platform-dependent DLT_
	values, to make it easier to exchange capture files between
	different OSes.

	Non-standard capture files produced by some Linux tcpdumps, e.g.
	the one from Red Hat Linux 6.2 and later, can now be read.

	Updated autoconf stock files.

	Filter expressions can filter on VLAN IDs and various OSI
	protocols, and work on Token Ring (with non-source-routed

	"pcap_open_dead()" added to allow compiling filter expressions
	to pcap code without opening a capture device or capture file.

	Header files fixed to allow use in C++ programs.

	Removed dependancy on native headers for packet layout.
	Removed Linux specific headers that were shipped.

	Security fixes: Strcpy replaced with strlcpy, sprintf replaced
	with snprintf.

	Fixed bug that could cause subsequent "pcap_compile()"s to fail
	erroneously after one compile failed.

	Assorted other bug fixes.

	README.aix and README.linux files added to describe
	platform-specific issues.

	"getifaddrs()" rather than SIOCGIFCONF used, if available.

v0.5 Sat Jun 10 11:09:15 PDT 2000
- Brought in KAME IPv6/IPsec bpf compiler.
- Fixes for NetBSD.
- Support added for OpenBSD DLT_LOOP and BSD/OS DLT_C_HDLC (Cisco HDLC),
  and changes to work around different BSDs having different DLT_ types
  with the same numeric value.

Assar Westerlund  <>
- Building outside the source code tree fixed.
- Changed to write out time stamps with 32-bit seconds and microseconds
  fields, regardless of whether those fields are 32 bits or 64 bits in
  the OS's native "struct timeval".
- Changed "pcap_lookupdev()" to dynamically grow the buffer into which
  the list of interfaces is read as necessary in order to hold the
  entire list.

Greg Troxel <>
- Added a new "pcap_compile_nopcap()", which lets you compile a filter
  expression into a BPF program without having an open live capture or
  capture file.

v0.4 Sat Jul 25 12:40:09 PDT 1998

- Fix endian problem with DLT_NULL devices. From FreeBSD via Bill
  Fenner (

- Fix alignment problem with FDDI under DLPI. This was causing core
  dumps under Solaris.

- Added configure options to disable flex and bison. Resulted from a
  bug report by (Bruce Barnett). Also added
  options to disable gcc and to force a particular packet capture type.

- Added support for Fore ATM interfaces (qaa and fa) under IRIX. Thanks
  to John Hawkinson (

- Change Linux PPP and SLIP to use DLT_RAW since the kernel does not
  supply any "link layer" data.

- Change Linux to use SIOCGIFHWADDR ioctl to determine link layer type.
  Thanks to Thomas Sailer (

- Change IRIX PPP to use DLT_RAW since the kernel does not supply any
  "link layer" data.

- Modified to support the new BSD/OS 2.1 PPP and SLIP link layer header

- Added some new SGI snoop interface types. Thanks to Steve Alexander

- Fixes for HP-UX 10.20 (which is similar to HP-UX 9). Thanks to
  Richard Allen ( and Steinar Haug (

- Fddi supports broadcast as reported by Jeff Macdonald
  ( Also correct ieee802 and arcnet.

- Determine Linux pcap buffer size at run time or else it might not be
  big enough for some interface types (e.g. FDDI). Thanks to Jes
  Sorensen (

- Fix some linux alignment problems.

- Document promisc argument to pcap_open_live(). Reported by Ian Marsh

- Support Metricom radio packets under Linux. Thanks to Kevin Lai

- Bind to interface name under Linux to avoid packets from multiple
  interfaces on multi-homed hosts. Thanks to Kevin Lai

- Change L_SET to SEEK_SET for HP-UX. Thanks to Roland Roberts

- Fixed an uninitialized memory reference found by Kent Vander Velden

- Fixed lex pattern for IDs to allow leading digits. As reported by
  Theo de Raadt (

- Fixed Linux include file problems when using GNU libc.

- Ifdef ARPHRD_FDDI since not all versions of the Linux kernel have it.
  Reported reported by Eric Jacksch (

- Fixed bug in pcap_dispatch() that kept it from returning on packet

- Changed ISLOOPBACK() macro when IFF_LOOPBACK isn't available to check
  for "lo" followed by an eos or digit (newer versions of Linux
  apparently call the loopback "lo" instead of "lo0").

- Fixed Linux networking include files to use ints instead of longs to
  avoid problems with 64 bit longs on the alpha. Thanks to Cristian
  Gafton (

v0.3 Sat Nov 30 20:56:27 PST 1996

- Added Linux support.

- Fixed savefile bugs.

- Solaris x86 fix from Tim Rylance (

- Add support for bpf kernel port filters.

- Remove duplicate atalk protocol table entry. Thanks to Christian
  Hopps (

- Fixed pcap_lookupdev() to ignore nonexistent devices. This was
  reported to happen under BSD/OS by David Vincenzetti

- Avoid solaris compiler warnings. Thanks to Bruce Barnett

v0.2.1 Sun Jul 14 03:02:26 PDT 1996

- Fixes for HP-UX 10. Thanks in part to to Thomas Wolfram
  ( and Rick Jones (

- Added support for SINIX. Thanks to Andrej Borsenkow

- Fixes for AIX (although this system is not yet supported). Thanks to
  John Hawkinson (

- Use autoconf's idea of the top level directory in install targets.
  Thanks to John Hawkinson.

- Add missing autoconf packet capture result message. Thanks to Bill
  Fenner (

- Fixed padding problems in the pf module.

- Fixed some more alignment problems on the alpha.

- Added explicit netmask support. Thanks to Steve Nuchia

- Fixed to handle raw ip addresses such as without "left

- Add "sca" keyword (for DEC cluster services) as suggested by Terry
  Kennedy (

- Add "atalk" keyword as suggested by John Hawkinson.

- Add "igrp" keyword.

- Fixed HID definition in grammar.y to be a string, not a value.

- Use $CC when checking gcc version. Thanks to Carl Lindberg

- Removed obsolete reference to pcap_immediate() from the man page.
  Michael Stolarchuk (

- DLT_NULL has a 4 byte family header. Thanks to Jeffrey Honig

v0.2 Sun Jun 23 02:28:42 PDT 1996

- Add support for HP-UX. Resulted from code contributed by Tom Murray
  ( and Philippe-Andri Prindeville

- Update INSTALL with a reminder to install include files. Thanks to
  Mark Andrews (

- Fix bpf compiler alignment bug on the alpha.

- Use autoconf to detect architectures that can't handle misaligned

- Added loopback support for snoop. Resulted from report Steve
  Alexander (

v0.1 Fri Apr 28 18:11:03 PDT 1995

- Fixed compiler and optimizer bugs.  The BPF filter engine uses unsigned
  comparison operators, while the code generator and optimizer assumed
  signed semantics in several places.  Thanks to Charlie Slater
  ( for pointing this out.

- Removed FDDI ifdef's, they aren't really needed. Resulted from report
  by Gary Veum (

- Add pcap-null.c which allows offline use of libpcap on systems that
  don't support live package capture. This feature resulting from a
  request from Jan van Oorschot (

- Make bpf_compile() reentrant. Fix thanks to Pascal Hennequin

- Port to GNU autoconf.

- Fix pcap-dlpi.c to work with isdn. Resulted from report by Flemming
  Johansen (

- Handle multi-digit interface unit numbers (aka ppa's) under dlpi.
  Resulted from report by Daniel Ehrlich (

- Fix pcap-dlpi.c to work in non-promiscuous mode. Resulted from report
  by Jeff Murphy (

- Add support for "long jumps". Thanks to Jeffrey Mogul

- Fix minor problems when compiling with BDEBUG as noticed by Scott
  Bertilson (

- Declare sys_errlist "const char *const" to avoid problems under
  FreeBSD. Resulted from report by

v0.0.6 Fri Apr 28 04:07:13 PDT 1995

- Add missing variable declaration missing from 0.0.6

v0.0.5 Fri Apr 28 00:22:21 PDT 1995

- Workaround for problems when pcap_read() returns 0 due to the timeout

v0.0.4 Thu Apr 20 20:41:48 PDT 1995

- Change configuration to not use gcc v2 flags with gcc v1.

- Fixed a bug in pcap_next(); if pcap_dispatch() returns 0, pcap_next()
  should also return 0. Thanks to Richard Stevens (

- Fixed configure to test for snoop before dlpi to avoid problems under
  IRIX 5. Thanks to J. Eric Townsend (

- Hack around deficiency in Ultrix's make.

- Fix two bugs related to the Solaris pre-5.3.2 bufmod bug; handle
  savefiles that have more than snapshot bytes of data in them (so we
  can read old savefiles) and avoid writing such files.

- Added checkioctl which is used with gcc to check that the
  "fixincludes" script has been run.

v0.0.3 Tue Oct 18 18:13:46 PDT 1994

- Fixed configure to test for snoop before dlpi to avoid problems under
  IRIX 5. Thanks to J. Eric Townsend (

v0.0.2 Wed Oct 12 20:56:37 PDT 1994

- Implement timeout in the dlpi pcap_open_live(). Thanks to Richard

- Determine pcap link type from dlpi media type. Resulted from report
  by Mahesh Jethanandani (

v0.0.1 Fri Jun 24 14:50:57 PDT 1994

- Fixed bug in nit_setflags() in pcap-snit.c. The streams ioctl timeout
  wasn't being initialized sometimes resulting in an "NIOCSFLAGS:
  Invalid argument" error under OSF/1. Reported by Matt Day
  ( and Danny Mitzel (

- Turn on FDDI support by default.

v0.0 Mon Jun 20 19:20:16 PDT 1994

- Initial release.

- Fixed bug with greater/less keywords, reported by Mark Andrews

- Fix bug where '|' was defined as BPF_AND instead of BPF_OR, reported
  by Elan Amir (

- Machines with little-endian byte ordering are supported thanks to
  Jeff Mogul.

- Add hack for version 2.3 savefiles which don't have caplen and len
  swapped thanks to Vern Paxson.

- Added "&&" and "||" aliases for "and" and "or" thanks to Vern Paxson.

- Added length, inbound and outbound keywords.