Support capturing on multiple interfaces #480

riccardomanfrin · 2015-09-07T13:03:08Z

I would be good to be able to listen on two or more interfaces in promisquous mode, which, to my knowledge/understanding is not supported.
There is unofficial documentation stating that multiple "-i" options do the job, but it appears as only the last interface is actually fetched.

guyharris · 2015-09-07T14:54:24Z

I would be good to be able to listen on two or more interfaces in promisquous mode, which, to my knowledge/understanding is not supported.

Listening on two or more interfaces isn't supported at all, except by capturing on the "any" device in Linux, and that device doesn't support promiscuous mode.

There is unofficial documentation stating that multiple "-i" options do the job

If we have documentation saying that, it needs to be fixed.

If somebody else has documentation saying that, they're mistaken and should stop saying that; perhaps they've confused tcpdump with Wireshark's dumpcap and/or TShark, which do support capturing on multiple interfaces.

dumpcap and TShark support writing pcapng files; tcpdump writes capture files using libpcap, which doesn't yet support writing pcapng files. You'd need pcapng to support the general case of capturing on multiple interfaces and saving to a file; we could, in principle, support tcpdump with multiple -i options and without -w, so that it prints packets, without pcapng support.

riccardomanfrin · 2015-09-07T15:05:07Z

Thanks for the fast reply.
I'll give a try with tshark. If yoy need I can provide you with reference to misleading documentation from external source.

guyharris · 2015-09-07T17:24:13Z

If yoy need I can provide you with reference to misleading documentation from external source.

Yes, please. That needs to be fixed.

infrastation · 2015-11-15T19:38:47Z

@riccardomanfrin, could you provide the link? Thank you.

riccardomanfrin · 2015-11-16T08:30:46Z

http://edoceo.com/cli/tcpdump

riccardomanfrin · 2015-11-16T08:31:20Z

It's my first output on G when searching for "tcpdump multiple interfaces"

infrastation · 2015-11-16T09:34:07Z

That page has got interesting comments. Apparently we cannot fix the Internet but I have left them a message.

Shall this issue remain open as a feature request?

riccardomanfrin · 2015-11-16T10:19:10Z

I guess so ;)
As for the question, as a prospective user, I'd definitely make use of such feature, therefore I would answer yes.

Thanks,
R

raellic · 2016-06-26T13:51:50Z

Could you bridge the connections and capture on that interface? I haven't done that with tcpdump but I've done it with Snort, and it seems to work great. In testing with tcpdump I've just used "&" to initiate multiple captures on different interfaces. Specifically, a tapped connection in which send and receive are on separate wires. Not ideal, but it seems to work. For better performance I've been looking at using taskset to assign particular instances of tcpdump to particular cores. If the timestamps are all accurate, you could combine the resulting capture files and get the same result as if you had multi-interface capable tcpdump.

raellic · 2016-06-27T03:16:52Z

I tried bridging with tcpdump today and it worked fine. Just tap the connection and bridge send and receive, and you get a capture file that shows everything.

gvanem · 2016-06-27T05:44:16Z

.. and you get a capture file that shows everything.

Not everything. AFAICS you'll get all packets intermingled with no information on which each interface each packet is from.

Depending on what you want to accomplish, writing to several .pcap files simultaneously and using tcpslice to extract the wanted details could be an alternative.

riccardomanfrin · 2016-06-27T07:37:52Z

Not everything. AFAICS you'll get all packets intermingled with no information on which each interface each packet is from.

Sadly.. I thought that since it works for any and single interfaces, supporting a specific set of them would be patch work, but I haven't read the code so I'm not in the position to make such guess

raellic · 2016-06-27T10:27:41Z

Not everything. AFAICS you'll get all packets intermingled with no information on which each interface each packet is from.

You're right, I don't get interface in the capture on a bridged connection. I'm running RHEL 6.8 with the latest versions of tcpdump and libpcap. Since I'm just capturing on a single tapped connection at the moment, this works for me, but if I were to capture on a bridge containing unrelated interfaces, I would definitely want to see which interface the packets were on. That would also be extremely useful for a tool like OmniPeek that supports multi-segment analysis. Instead of aggregating multiple capture files with OmniPeek, you could have one capture running on your router or an inline appliance and get all the traffic from multiple interfaces, with a perfect record of which packets came in on which interface.

raellic · 2016-06-27T15:02:53Z

Thanks, actually I edited my post to remove the Mac OS X section because I realized that I was capturing on "any" interface rather than on a bridged connection, so it wasn't relevant to my post. I was going to try bridging two interfaces and capturing on that, but Mac OS X doesn't apparently have the usual brctl program. I will figure it out and see what happens.

Sent from my iPhone

On Jun 27, 2016, at 7:02 AM, Gisle Vanem [email protected] wrote:

@raellic

Out of curiosity, I tried tcpdump on Mac OS X 10.11.5 on multiple interfaces and it does
show which interface the packets came in on (see screenshots attached).

Answering via email and your nice screen-shots seems to have been dropped by Github somehow 😦 . You can probably edit your answer above here.

—
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub, or mute the thread.

gvanem · 2016-06-28T07:57:50Z

Thanks, actually I edited my post to remove the Mac OS X section because ...

I noticed that too, but a bit too late. That's why I deleted my reply.

guyharris · 2016-06-28T08:16:30Z

but Mac OS X doesn't apparently have the usual brctl program

If "usual" means "common-on-Linux", then that's because OS X/Darwin isn't Linux (just as *BSD, Solaris, AIX, HP-UX, etc. aren't Linux).

raellic · 2016-07-03T13:37:08Z

As a start, I'm looking at identifying in the output which interface the packets came in on when capturing on a bridged connection. I'm new to this project; anyone know roughly where in the source this feature should go? Thanks.

infrastation · 2016-07-03T15:54:57Z

It may happen you are looking to finish this work.

djbusby · 2017-02-12T07:16:17Z

Hey, I'm the one who has the site with the bad information on -i ; I've finally fixed that page after '@infrastation' requested the update in 2015. Better late than never I guess

infrastation · 2017-02-12T07:47:03Z

Yes, better late than never. Thank you!

leonerd · 2018-04-11T20:40:36Z

@raellic:

As a start, I'm looking at identifying in the output which interface the packets came in on when capturing on a bridged connection. I'm new to this project; anyone know roughly where in the source this feature should go? Thanks.

My suggestion would be to implement the LINUX_SLL2 header type, which includes interface index information.

infrastation · 2018-07-24T10:47:22Z

Given the initial SLL2 implementation, what is the main reason to keep this feature request open? Is it because tcpdump -i any does not put any of the interfaces into promiscuous mode or is it because the user cannot specify exact few interfaces as opposed to all interfaces in the system? Please try to describe specific practical use cases to support your point.

sbonds · 2018-07-24T14:33:48Z

For my use cases, it would be great to specify a specific subset of interfaces and capture on that set. Information on which packets came from which interface is important for later decoding. I do not need promiscuous mode except in very rare cases.

leonerd · 2018-07-24T19:09:37Z

Presumably if the ifindex or ifname filter syntax were implemented (because SLL2 has the interface index known), then this would be a simple matter of

-i any -f "ifindex 2 or ifindex 5 or ..."

infrastation · 2018-07-24T20:50:29Z

That could be simpler than the one thread per interface parallel captures I had in my mind.

fenner · 2019-04-25T20:32:18Z

Interestingly, libpcap subtracts SLL2_HDR_LEN from constant loads on LINUX_SLL2 sockets, so you have to use ether[-4068:4]' to get it to install ether[-4088:4]` in the kernel to access the ifIndex. Presumably "real" lipbcap code would avoid this detail, but putting it here if anyone else is experimenting.

This fixes the offset issue I mention in the-tcpdump-group/tcpdump#480 (comment)

fenner · 2019-05-05T14:56:41Z

I’ve also implemented the ifindex filter keyword at https://github.com/fenner/libpcap/tree/ifindex . Using this, tcpdump -y linux_sll2 -i any ifindex 2 or ifindex 4 or ifindex 6 works to capture on 3 interfaces simultaneously. I’ll submit a pull request for this after a little more testing.

I haven’t yet dealt with interface names, due to the conflict with the existing PF code. It’s reasonably straightforward to deal with, I think, but does have some subtle details like converting name to ifindex isn’t necessarily correct for save files generated In a different context.

mcr · 2019-05-06T14:24:47Z

fenner <[email protected]> wrote: I’ve also implemented the ifindex filter keyword at https://github.com/fenner/libpcap/tree/ifindex . Using this, tcpdump -y linux_sll2 -i any ifindex 2 or ifindex 4 or ifindex 6 works to capture on 3 interfaces simultaneously. I’ll submit a pull request for this after a little more testing. So this might allow one to capture on only an interface that is not yet up. It's often very difficult to capture the first few packets (DADs, PADTs, etc.)

This fixes the offset issue I mention in the-tcpdump-group/tcpdump#480 (comment)

This fixes the offset issue I mention in the-tcpdump-group/tcpdump#480 (comment) (cherry picked from commit eebbdd4)

Summary for 1.10.1 libpcap release (so far!) Packet filtering: Fix "type XXX subtype YYY" giving a parse error Source code: Add PCAP_AVAILABLE_1_11. Building and testing: Rename struct bpf_aux_data to avoid NetBSD compile errors Squelch some compiler warnings Squelch some Bison warnings Fix cross-builds with older kernels lacking BPF_MOD and BPF_XOR Fix Bison detection for minor version 0. Fix parallel build with FreeBSD make. Get DLT_MATCHING_MAX right in gencode.c on NetBSD. Define timeradd() and timersub() if necessary. Fix Cygwin/MSYS target directories. Fix symlinking with DESTDIR. Fix generation of libpcap.pc with CMake when not building a shared library. Check for Arm64 as well as x86-64 when looking for packet.lib on Windows. Documentation: Refine Markdown in README.md. Improve the description of portrange in filters. README.linux.md isn't Markdown, rename it just README.linux. pcapng: Support reading version 1.2, which some writers produce, and which is the same as 1.0 (some new block types were added, but that's not sufficient reason to bump the minor version number, as code that understands those new block types can handle them in a 1.0 file) Linux: Drop support for text-mode USB captures, as we require a 2.6.27 or later kernel (credit to Chaoyuan Peng for noting the sscanf vulnerabilities in the text-mode code that got me to realize that we didn't need this code any more) Bluetooth: fix non-blocking mode. Don't assume that all compilers used to build for Linux support the __atomic builtins Windows: Add more information in "interface disappeared" error messages, in the hopes of trying to figure out the cause. Treat ERROR_DEVICE_REMOVED as "device was removed". Indicate in the error message which "device was removed" error occurred. Report the Windows error status if PacketSendPacket() fails. Use %lu for ULONGs in error message formats. Don't treat the inability to find airpcap.dll as an error. Ignore spurious error reports by Microsoft Surface mobile telephony modem driver rpcap: Clean up error checking and error messages for server address lookup. Summary for 1.10.0 libpcap release Add support for capturing on DPDK devices Label most APIs by the first release in which they're available Fix some memory leaks, including in pcap_compile() Add pcap_datalink_val_to_description_or_dlt() Handle the pcap private data in a fashion that makes fewer assumptions about memory layouts (might fix GitHub issue #940 on ARM) Fix some thread safety issues pcap_findalldevs(): don't sort interfaces by unit number Always return a list of supported time-stamp types, even if only host time stamps are supported Increase the maximum snaplen for LINKTYPE_USBPCAP/DLT_USBPCAP Report the DLT description in error messages Add pcap_init() for first-time initialization and global option setting; it's not required, but may be used Remove (unused) SITA support Capture file reading: Correctly handle pcapng captures with more than one IDB with a snspshot length greater than the supported maximum Capture file writing: Create the file in pcap_dump_open_append() if it doesn't exist Packet filtering: Fix "unknown ether proto 'aarp'" Add a new filter "ifindex" for DLT_LINUX_SLL2 files on all platforms and live Linux captures Add a hack to the optimizer to try to catch certain optimizer loops (should prevent GitHub issue #112) Show special Linux BPF offsets symbolically in bpf_image() and bpf_dump() Added support for ICMPv6 types 1-4 as tokens with names Remove undocumented and rather old "ether proto" protocols Catch invalid IPv4 addresses in filters Don't assume ARM supports unaligned accesses Security and other issues found by analysis: Fix various security issues reported by Charles Smith at Tangible Security Fix various security issues reported by Include Security Fix some issues found by cppcheck. Add some overflow checks in the optimizer rpcap: Support rpcap-over-TLS Redo protocol version negotiation to avoid problems with old servers (it still works with servers using the old negotiation, as well as servers not supporting negotiation) Error handling cleanups Add some new authentication libpcap error codes for specific errors Fix some inetd issues in rpcapd Fix rpcapd core dumps with invalid configuration file On UN*X, don't have rpcapd tell the client why authentication failed, so a brute-force attacker can't distinguish between "unknown user name" and "known user name, wrong password" Allow rpcapd to rebind more rapidly (GitHub issue #765) Documentation: Improve man pages, including adding backward compatibility notes Building and testing: Require, and assume, some level of C99 support in the C compiler Require Visual Studio 2015 or later if using Visual Studio Fix configure script issues, including with libnl on Linux Fix CMake issues Squelch complaints from Bison about "%define api.pure" being deprecated Fix compilation of pcap-tc.c Linux: Require PF_PACKET support, and kernel 2.6.27 or later Handle systems without AF_INET or AF_UNIX socket support Get rid of Wireless Extensions for turning monitor mode on Proper memory sync for PACKET_MMAP (may prevent GitHub issue #898) Drop support for libnl 1 and 2. Return error on interface going away, but not if it just went down but is still present Set socket protocol only after packet ring configured, reducing bogus packet drop reports Get ifdrop stats from sysfs. When adjusting BPF programs, do not subtract the SLL[2]_HDR_LEN if the location is negative (special metadata offset), to preserve references to metadata; see the-tcpdump-group/tcpdump#480 (comment) Report a warning for unknown ARPHRD types Have pcap_breakloop() forcibly break out of a sleeping capture loop Add support for DSA data link types For raw USB bus capture, use the snapshot length to set the buffer size, and set the len field to reflect the length in the URB (GitHub issue #808) With a timeout of zero, wait indefinitely Clean up support for some non-GNU libc C libraries Add DLT_LINUX_SLL2 for cooked-mode captures Probe CONFIGURATION descriptor of connected USB devices Treat EPERM on ethtool ioctls as meaning "not supported", as permissions checks are done before checking whether the ioctl is supported at all macOS: Cope with getting EPWROFF from SIOCGIFMEDIA Treat EPERM on SIOCGIFMEDIA as meaning "not supported", as permissions checks are done before checking whether the ioctl is supported at all Treat ENXIO when reading packets as meaning "the interface was removed" Report "the interface disappeared", not "the interface went down", if the interface was removed during a capture FreeBSD: Treat ENXIO as meaning "the interface was removed" Report "the interface disappeared", not "the interface went down", if the interface was removed during a capture NetBSD: Treat ENXIO as meaning "the interface was removed" Report "the interface disappeared", not "the interface went down", if the interface was removed during a capture OpenBSD: Treat EIO as meaning "the interface was removed" Report "the interface disappeared", not "the interface went down", if the interface was removed during a capture DragonFly BSD: Treat ENXIO as meaning "the interface was removed" Report "the interface disappeared", not "the interface went down", if the interface was removed during a capture Solaris: Treat ENXIO as meaning "the interface was removed" Report "the interface disappeared", not "the interface went down", if the interface was removed during a capture AIX: Fix loading of BPF kernel extension Treat ENXIO as meaning "the interface was removed" Report "the interface disappeared", not "the interface went down", if the interface was removed during a capture Windows: Make the snapshot length work even if pcap_setfilter() isn't called Fix compilation on Cygwin/MSYS Add pcap_handle(), and deprecate pcap_fileno() Report PCAP_ERROR_NO_SUCH_DEVICE for a non-existent device Return an appropriate error message for device removed or device unusable due to a suspend/resume Report a warning for unknown NdisMedium types Have pcap_breakloop() forcibly break out of a sleeping capture loop Clean up building DLL Handle CRT mismatch for pcap_dump_fopen() Map NdisMediumWirelessWan to DLT_RAW Add AirPcap support in a module, rather than using WinPcap/Npcap's support for it Report the system error for PacketSetHwFilter() failures Add support for getting and setting packet time stamp types with Npcap Have pcap_init() allow selecting whether the API should use local code page strings or UTF-8 strings (including error messages) Haiku: Add capture support

Friday, April 7, 2023 / The Tcpdump Group Summary for 1.10.4 libpcap release Source code: Fix spaces before tabs in indentation. rpcap: Fix name of launchd service. Documentation: Document use of rpcapd with systemd, launchd, inetd, and xinetd. Building and testing: Require at least pkg-config 0.17.0, as we use --static. Get rid of the remains of gnuc.h. Require at least autoconf 2.69. Update config.{guess,sub}, timestamps 2023-01-01,2023-01-21. Thursday, January 12, 2023 / The Tcpdump Group Summary for 1.10.3 libpcap release Source code: Sort the PUBHDR variable in Makefile.in in "ls" order. Fix typo in comment in pflog.h. Remove two no-longer-present files from .gitignore. Update code and comments for handling failure to set promiscuous mode based on new information. Building and testing: install: Fixed not to install the non-public pcap-util.h header. pcap-config: add a --version flag. Makefile.in: Add some missing files in the distclean target. Saturday, December 31, 2022 / The Tcpdump Group Summary for 1.10.2 libpcap release Source code: Use __builtin_unreachable() in PCAP_UNREACHABLE. Use AS_HELP_STRING macro instead of AC_HELP_STRING in the configure scripts, to avoid deprecation warnings. Change availability tags in pcap.h to make it easier to arrange for it to be used in Darwin releases. Use AS_HELP_STRING for --enable-remote. Fix some formatting string issues found by cppcheck. Various small code and comment cleanups. Use PCAP_ERROR (defined as -1) rather than explicit -1 for functions the documentation says return PCAP_ERROR. Remove unused code from the filter compiler. Use _declspec(deprecated(msg)) rather than __pragma(deprecated) for Windows deprecation warnings, so the message that was specified shows up. diag-control.h: define PCAP_DO_PRAGMA() iff we're going to use it. Use "%d" to print some signed ints. Use the Wayback Machine for a removed document in a comment. Add some const qualifiers. RDMA: Use PRIu64 to print a uint64_t. "Dead" pcap_ts from pcap_open_dead() and ..._with_tstamp_precision(): Don't crash if pcap_breakloop() is called. Savefiles: Fix pcap_dispatch() to return number of packets processed, rather than 0, even at EOF. If we get an error writing the packet header, don't write the packet data. Put PFLOG UID and PID values in the header into host byte order when reading a LINKTYPE_PFLOG file. Put CAN ID field in CAN pseudo-headers for LINUX_SLL2, as we do for LINUX_SLL. Fix inorrectly-computed "real" length for isochronous USB transfers when reading savefiles. Don't crash if pcap_can_set_rfmon() is called. Fix pcap_offline_read() loop. Capture: Never process more than INT_MAX packets in a pcap_dispatch() call, to avoid integer overflow (issue #1087). Improve error messages for "no such device" and "permission denied" errors. SITA: Fix a typo in a variable name. Packet filtering: Get PFLOG header length from the length value in the header. Support all the direction, reason, and action types supported by all systems that support PFLOG. Don't require PFLOG support on the target machine in order to support PFLOG filtering (also fixes issue #1076). Expand abbreviations into "proto X" properly. gencode.c: Update a comment about the VLAN TPID test. Add the minimum and maximum matching DLTs to an error message. Linux: Fix memory leak in capture device open (pull request #1038). Fix detection of CAN/CAN FD packets in direction check (issue #1051). Fix double-free crashes on errors such as running on a kernel with CONFIG_PACKET_MMAP not configured (issue #1054). Use DLT_CAN_SOCKETCAN for CANbus interfaces (issue #1052; includes changes from pull request #1035). Make sure the CANFD_FDF can be relied on to indicate whether a CANbus packet is a CAN frame or a CAN FD frame Improve error message for "out of memory" errors for kernel filters (see issue #1089). Fix pcap_findalldevs() to find usbmon devices. Fix handling of VLAN tagged packets if the link-layer type is changed from DLT_LINUX_SLL to DLT_LINUX_SLL2 (see issue #1105). Always turn on PACKET_AUXDATA (see issue #1105). We require 2.6.27 or later, so PACKET_RESERVE is available. Make sure there's reserved space for a DLT_LINUX_SLL2 header when capturing. Correctly compute the "real" length for isochronous USB transfers. Don't have an eventfd descriptor open in non-blocking mode, so as not to waste descriptors. netfilter: Squelch a narrowing warning (To be look at before 2038). BPF capture (*BSD, macOS, AIX, Solaris 11): Fix case where a device open might fail, rather than falling back to a smaller buffer size, when the initial buffer size is too big. Use an unsigned device number to iterate over BPF devices, to squelch a compiler warning. NetBSD: Fix handling of LINKTYPE_HDLC/DLT_HDLC. rpcap: Fix unaligned accesses in rpcapd (pull request #1037). Fix code to process port number. Clean up findalldevs code in rpcapd. Clean up bufferizing code. Fix a file descriptor/handle leak in pcap_findalldevs_ex() (Coverity CID 1507240). Improve error messages for host and port resolution errors. Fix connect code not to fail if both IPv4 and IPv6 addresses are tried. Improve connect failure error message. Provide an error message for a bad authentication reply size. For link-layer types with host-endian fields in the header, fix those fields if capturing from a server with a different byte order. Suppress temporarily the warnings with "enable remote packet capture". Windows: Add support for NdisMediumIP (pull request #1027). Don't require applications using pcap to be built with VS 2015 or later. Use the correct string for the DLL VersionInfo. Remove unnecessary DllMain() function. Correctly handle ERROR_INVALID_FUNCTION from PacketGetTimestampModes() (indicate that WinPcap or an older version of Npcap is probably installed). Fix use-after-free in some cases when a pcap_t is closed. Make sure an error is returned by pcap_create_interface() if PacketOpenAdapter() fails. Return an error if the driver reports 0 timestamp modes supported. Close the ADAPTER handle for some errors in pcap_create_interface(). Get rid of old umaintained VS project files. Fix deprecation warning for pcap_handle(). Npcap is now at npcap.com, not npcap.org. Make sure "no such device" and "no permission to open device" errors show up in pcap_activate(), not pcap_create() (fixes, among other things, tcpdump -i <interface-number>). npcap: squelch deprecation warnings for kernel dump mode. Haiku: Implement pcap_lib_version(), as now required. Handle negative or too-large snaplen values. Fix various build issues and warnings. Building and testing: Update configure-time universal build checks for macOS. Update config.guess and config.sub. If we look for an SSL library with pkg-config in configure script, try pkg-config first. If we have pkg-config and Homebrew, try to set pkg-config up to find Homebrew packages. Handle some Autoconf/make errors better. Use "git archive" for the "make releasetar" process. Remove the release candidate rcX targets. Fix compiling on Solaris 9/SPARC and 11/AMD64. Address assorted compiler warnings. Fix cross-building on Linux for Windows with mingw32 for Win64 (pull request #1031). Properly set installation directory on Windows when not compiling with MSVC. Fix configure script checks for compiler flags. Give more details if check for usable (F)Lex fails. Fix compiling with GCC 4.6.4. Don't use add_compile_options() with CMake, as we currently don't require 2.8.12, where it first appeared. Don't provide -L/usr/lib for pkg-config --libs in pkg-config. Fix error message for inadequate Bison/Berkeley YACC. configure: correctly do some DPDK checks. Only use pkg-config when checking for DPDK. Allow the path in which DPDK is installed to be specified. Use pkg-config first when checking for libibverbs. CMake: fix check for libibverbs with Sun's C compiler. Have CMake warn if no capture mechanism can be found. Don't do stuff requiring 3.19 or later on earlier CMakes. Squelch some CMake warnings. Fix diag-control.h to handle compiling with clang-cl (issues #1101 and #1115). Cleanup various leftover cruft in the configure script. Fix building without protochain support. (GH #852) Check for a usable YACC (or Bison) and {F}lex in CMake, as we do in autotools. Only check for a C++ compiler on Haiku, as that's the only platform with C++ code, and make sure they generate code for the same instruction set bit-width (both 32-bit or both 64-bit) (issue #1112). On Solaris, check the target bit-width and set PKG_CONFIG_PATH appropriately, to handle the mess that is the D-Bus library package (issue #1112). Fix generation of pcap-config and libpcap.pc files (issue #1062). pcap-config: don't assume the system library directory is /usr/lib. pcap-config: add a --static-pcap-only flag. Cirrus CI: Use the same configuration as for the main branch. Add four libpcap test files. Update Npcap SDK to 1.13. Makefile.in: Use TEST_DIST, like for tcpdump. Remove awk code from mkdep. Cirrus CI: Add the libssl-dev package in the Linux task. Cirrus CI: Add the openssl@3 brew package in the macOS task. Get "make shellcheck" to pass again. CMake: Build valgrindtest only if Autoconf would. CMake: use ${CMAKE_INSTALL_SBINDIR} rather than just sbin. CMake: use NUL: as the null device on Windows. autoconf: fix typo in test of macOS version. Makefile.in: Add two missing files in EXTRA_DIST. autotools, cmake: provide an rpath option if necessary. configure: get rid of the attempt to auto-run PKG_PROG_PKG_CONFIG. configure: use PKG_CHECK_MODULES to run pkg-config. Documentation: Add README.solaris.md. Add SCTP to pcap-filter(7). Note that = and == are the same operator in filters (issue #1044). Update INSTALL.md, README.md, and README.solaris.md. Update and clean up CONTRIBUTING.md. Trim documentation of support for now-dead UN*Xe and older versions of other UN*Xes. Move the "how to allocate a LINKTYPE_/DLT_ value" documentation to the web site. Clean up man pages. Move README.capture-module to the web site. Improve some protocol details in pcap-filter(7). Refine "relop" notes in pcap-filter(7). In pcap-filter(7) "domain" is an id. Discuss backward compatibility in pcap-filter(7). Other improvements to pcap-filter(7). Document pcap_breakloop(3PCAP) interaction with threads better. Document PCAP_ERROR_NOT_ACTIVATED for more routines. Wednesday, June 9, 2021: Summary for 1.10.1 libpcap release: Packet filtering: Fix "type XXX subtype YYY" giving a parse error Source code: Add PCAP_AVAILABLE_1_11. Building and testing: Rename struct bpf_aux_data to avoid NetBSD compile errors Squelch some compiler warnings Squelch some Bison warnings Fix cross-builds with older kernels lacking BPF_MOD and BPF_XOR Fix Bison detection for minor version 0. Fix parallel build with FreeBSD make. Get DLT_MATCHING_MAX right in gencode.c on NetBSD. Define timeradd() and timersub() if necessary. Fix Cygwin/MSYS target directories. Fix symlinking with DESTDIR. Fix generation of libpcap.pc with CMake when not building a shared library. Check for Arm64 as well as x86-64 when looking for packet.lib on Windows. Documentation: Refine Markdown in README.md. Improve the description of portrange in filters. README.linux.md isn't Markdown, rename it just README.linux. pcapng: Support reading version 1.2, which some writers produce, and which is the same as 1.0 (some new block types were added, but that's not sufficient reason to bump the minor version number, as code that understands those new block types can handle them in a 1.0 file) Linux: Drop support for text-mode USB captures, as we require a 2.6.27 or later kernel (credit to Chaoyuan Peng for noting the sscanf vulnerabilities in the text-mode code that got me to realize that we didn't need this code any more) Bluetooth: fix non-blocking mode. Don't assume that all compilers used to build for Linux support the __atomic builtins Windows: Add more information in "interface disappeared" error messages, in the hopes of trying to figure out the cause. Treat ERROR_DEVICE_REMOVED as "device was removed". Indicate in the error message which "device was removed" error occurred. Report the Windows error status if PacketSendPacket() fails. Use %lu for ULONGs in error message formats. Don't treat the inability to find airpcap.dll as an error. Ignore spurious error reports by Microsoft Surface mobile telephony modem driver rpcap: Clean up error checking and error messages for server address lookup. Tuesday, December 29, 2020 Summary for 1.10.0 libpcap release Add support for capturing on DPDK devices Label most APIs by the first release in which they're available Fix some memory leaks, including in pcap_compile() Add pcap_datalink_val_to_description_or_dlt() Handle the pcap private data in a fashion that makes fewer assumptions about memory layouts (might fix GitHub issue #940 on ARM) Fix some thread safety issues pcap_findalldevs(): don't sort interfaces by unit number Always return a list of supported time-stamp types, even if only host time stamps are supported Increase the maximum snaplen for LINKTYPE_USBPCAP/DLT_USBPCAP Report the DLT description in error messages Add pcap_init() for first-time initialization and global option setting; it's not required, but may be used Remove (unused) SITA support Capture file reading: Correctly handle pcapng captures with more than one IDB with a snspshot length greater than the supported maximum Capture file writing: Create the file in pcap_dump_open_append() if it doesn't exist Packet filtering: Fix "unknown ether proto 'aarp'" Add a new filter "ifindex" for DLT_LINUX_SLL2 files on all platforms and live Linux captures Add a hack to the optimizer to try to catch certain optimizer loops (should prevent GitHub issue #112) Show special Linux BPF offsets symbolically in bpf_image() and bpf_dump() Added support for ICMPv6 types 1-4 as tokens with names Remove undocumented and rather old "ether proto" protocols Catch invalid IPv4 addresses in filters Don't assume ARM supports unaligned accesses Security and other issues found by analysis: Fix various security issues reported by Charles Smith at Tangible Security Fix various security issues reported by Include Security Fix some issues found by cppcheck. Add some overflow checks in the optimizer rpcap: Support rpcap-over-TLS Redo protocol version negotiation to avoid problems with old servers (it still works with servers using the old negotiation, as well as servers not supporting negotiation) Error handling cleanups Add some new authentication libpcap error codes for specific errors Fix some inetd issues in rpcapd Fix rpcapd core dumps with invalid configuration file On UN*X, don't have rpcapd tell the client why authentication failed, so a brute-force attacker can't distinguish between "unknown user name" and "known user name, wrong password" Allow rpcapd to rebind more rapidly (GitHub issue #765) Documentation: Improve man pages, including adding backward compatibility notes Building and testing: Require, and assume, some level of C99 support in the C compiler Require Visual Studio 2015 or later if using Visual Studio Fix configure script issues, including with libnl on Linux Fix CMake issues Squelch complaints from Bison about "%define api.pure" being deprecated Fix compilation of pcap-tc.c Linux: Require PF_PACKET support, and kernel 2.6.27 or later Handle systems without AF_INET or AF_UNIX socket support Get rid of Wireless Extensions for turning monitor mode on Proper memory sync for PACKET_MMAP (may prevent GitHub issue #898) Drop support for libnl 1 and 2. Return error on interface going away, but not if it just went down but is still present Set socket protocol only after packet ring configured, reducing bogus packet drop reports Get ifdrop stats from sysfs. When adjusting BPF programs, do not subtract the SLL[2]_HDR_LEN if the location is negative (special metadata offset), to preserve references to metadata; see the-tcpdump-group/tcpdump#480 (comment) Report a warning for unknown ARPHRD types Have pcap_breakloop() forcibly break out of a sleeping capture loop Add support for DSA data link types For raw USB bus capture, use the snapshot length to set the buffer size, and set the len field to reflect the length in the URB (GitHub issue #808) With a timeout of zero, wait indefinitely Clean up support for some non-GNU libc C libraries Add DLT_LINUX_SLL2 for cooked-mode captures Probe CONFIGURATION descriptor of connected USB devices Treat EPERM on ethtool ioctls as meaning "not supported", as permissions checks are done before checking whether the ioctl is supported at all macOS: Cope with getting EPWROFF from SIOCGIFMEDIA Treat EPERM on SIOCGIFMEDIA as meaning "not supported", as permissions checks are done before checking whether the ioctl is supported at all Treat ENXIO when reading packets as meaning "the interface was removed" Report "the interface disappeared", not "the interface went down", if the interface was removed during a capture FreeBSD: Treat ENXIO as meaning "the interface was removed" Report "the interface disappeared", not "the interface went down", if the interface was removed during a capture NetBSD: Treat ENXIO as meaning "the interface was removed" Report "the interface disappeared", not "the interface went down", if the interface was removed during a capture OpenBSD: Treat EIO as meaning "the interface was removed" Report "the interface disappeared", not "the interface went down", if the interface was removed during a capture DragonFly BSD: Treat ENXIO as meaning "the interface was removed" Report "the interface disappeared", not "the interface went down", if the interface was removed during a capture Solaris: Treat ENXIO as meaning "the interface was removed" Report "the interface disappeared", not "the interface went down", if the interface was removed during a capture AIX: Fix loading of BPF kernel extension Treat ENXIO as meaning "the interface was removed" Report "the interface disappeared", not "the interface went down", if the interface was removed during a capture Windows: Make the snapshot length work even if pcap_setfilter() isn't called Fix compilation on Cygwin/MSYS Add pcap_handle(), and deprecate pcap_fileno() Report PCAP_ERROR_NO_SUCH_DEVICE for a non-existent device Return an appropriate error message for device removed or device unusable due to a suspend/resume Report a warning for unknown NdisMedium types Have pcap_breakloop() forcibly break out of a sleeping capture loop Clean up building DLL Handle CRT mismatch for pcap_dump_fopen() Map NdisMediumWirelessWan to DLT_RAW Add AirPcap support in a module, rather than using WinPcap/Npcap's support for it Report the system error for PacketSetHwFilter() failures Add support for getting and setting packet time stamp types with Npcap Have pcap_init() allow selecting whether the API should use local code page strings or UTF-8 strings (including error messages) Haiku: Add capture support

guyharris changed the title ~~Selectively admit promisquous mode on multiple interfaces~~ Support capturing on multiple interfaces Sep 7, 2015

guyharris added the feature request label Sep 7, 2015

infrastation mentioned this issue Aug 5, 2016

Replace exit() with the new exit_tcpdump(), which calls smiExit() #535

Closed

infrastation mentioned this issue Jul 31, 2018

[Feature] Add capability to print interface name #296

Closed

guyharris mentioned this issue Apr 26, 2019

Do not subtract the SLL[2]_HDR_LEN if the location is negative. the-tcpdump-group/libpcap#820

Merged

fenner added a commit to fenner/libpcap that referenced this issue Apr 27, 2019

Do not subtract the SLL[2]_HDR_LEN if the location is negative.

926dacf

This fixes the offset issue I mention in the-tcpdump-group/tcpdump#480 (comment)

fenner added a commit to fenner/libpcap that referenced this issue Apr 28, 2019

Preserve references to metadata when adjusting the program.

0dfc47a

This fixes the offset issue I mention in the-tcpdump-group/tcpdump#480 (comment)

fenner added a commit to fenner/libpcap that referenced this issue May 13, 2019

Preserve references to metadata when adjusting the program.

c0e2634

This fixes the offset issue I mention in the-tcpdump-group/tcpdump#480 (comment)

fenner added a commit to fenner/libpcap that referenced this issue May 13, 2019

Preserve references to metadata when adjusting the program.

4fa3b34

This fixes the offset issue I mention in the-tcpdump-group/tcpdump#480 (comment)

fenner added a commit to fenner/libpcap that referenced this issue May 20, 2019

Preserve references to metadata when adjusting the program.

d780526

This fixes the offset issue I mention in the-tcpdump-group/tcpdump#480 (comment)

fenner added a commit to fenner/libpcap that referenced this issue May 20, 2019

Preserve references to metadata when adjusting the program.

a43b1c9

This fixes the offset issue I mention in the-tcpdump-group/tcpdump#480 (comment)

fenner added a commit to fenner/libpcap that referenced this issue Jun 19, 2019

Preserve references to metadata when adjusting the program.

b80c6a6

This fixes the offset issue I mention in the-tcpdump-group/tcpdump#480 (comment)

fenner added a commit to fenner/libpcap that referenced this issue Jul 2, 2019

Preserve references to metadata when adjusting the program.

007f487

This fixes the offset issue I mention in the-tcpdump-group/tcpdump#480 (comment)

fenner added a commit to fenner/libpcap that referenced this issue Jul 11, 2019

Preserve references to metadata when adjusting the program.

f4a55e5

This fixes the offset issue I mention in the-tcpdump-group/tcpdump#480 (comment)

fenner added a commit to fenner/libpcap that referenced this issue Sep 4, 2019

Preserve references to metadata when adjusting the program.

844c858

This fixes the offset issue I mention in the-tcpdump-group/tcpdump#480 (comment)

fenner added a commit to fenner/libpcap that referenced this issue Sep 4, 2019

Preserve references to metadata when adjusting the program.

aa14bdb

This fixes the offset issue I mention in the-tcpdump-group/tcpdump#480 (comment)

fenner added a commit to fenner/libpcap that referenced this issue Sep 27, 2019

Preserve references to metadata when adjusting the program.

eebbdd4

This fixes the offset issue I mention in the-tcpdump-group/tcpdump#480 (comment)

fxlb pushed a commit to fxlb/libpcap that referenced this issue Sep 30, 2019

Preserve references to metadata when adjusting the program.

bf4a63b

This fixes the offset issue I mention in the-tcpdump-group/tcpdump#480 (comment) (cherry picked from commit eebbdd4)

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Support capturing on multiple interfaces #480

Support capturing on multiple interfaces #480

riccardomanfrin commented Sep 7, 2015

guyharris commented Sep 7, 2015

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guyharris commented Sep 7, 2015

infrastation commented Nov 15, 2015

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infrastation commented Nov 16, 2015

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raellic commented Jun 27, 2016 •

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raellic commented Jun 27, 2016

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fenner commented Apr 25, 2019 •

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fenner commented May 5, 2019

mcr commented May 6, 2019 via email

Support capturing on multiple interfaces #480

Support capturing on multiple interfaces #480

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riccardomanfrin commented Sep 7, 2015

guyharris commented Sep 7, 2015

riccardomanfrin commented Sep 7, 2015

guyharris commented Sep 7, 2015

infrastation commented Nov 15, 2015

riccardomanfrin commented Nov 16, 2015

riccardomanfrin commented Nov 16, 2015

infrastation commented Nov 16, 2015

riccardomanfrin commented Nov 16, 2015

raellic commented Jun 26, 2016

raellic commented Jun 27, 2016

gvanem commented Jun 27, 2016

riccardomanfrin commented Jun 27, 2016

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gvanem commented Jun 28, 2016

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raellic commented Jul 3, 2016

infrastation commented Jul 3, 2016

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infrastation commented Feb 12, 2017

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infrastation commented Jul 24, 2018

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mcr commented May 6, 2019 via email

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