pax_global_header00006660000000000000000000000064122143752620014516gustar00rootroot0000000000000052 comment=0765da45aad351781f865efa6aaf82fafc43fc18 driftnet-1.1.2/000077500000000000000000000000001221437526200133365ustar00rootroot00000000000000driftnet-1.1.2/COPYING000066400000000000000000000431301221437526200143720ustar00rootroot00000000000000 GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Library General Public License instead.) You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it. For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you". Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does. 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program. You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee. 2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions: a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change. b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License. c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.) These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program. In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License. 3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following: a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, c) Accompany it with the information you received as to the offer to distribute corresponding source code. (This alternative is allowed only for noncommercial distribution and only if you received the program in object code or executable form with such an offer, in accord with Subsection b above.) The source code for a work means the preferred form of the work for making modifications to it. For an executable work, complete source code means all the source code for all modules it contains, plus any associated interface definition files, plus the scripts used to control compilation and installation of the executable. However, as a special exception, the source code distributed need not include anything that is normally distributed (in either source or binary form) with the major components (compiler, kernel, and so on) of the operating system on which the executable runs, unless that component itself accompanies the executable. If distribution of executable or object code is made by offering access to copy from a designated place, then offering equivalent access to copy the source code from the same place counts as distribution of the source code, even though third parties are not compelled to copy the source along with the object code. 4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License. Any attempt otherwise to copy, modify, sublicense or distribute the Program is void, and will automatically terminate your rights under this License. However, parties who have received copies, or rights, from you under this License will not have their licenses terminated so long as such parties remain in full compliance. 5. You are not required to accept this License, since you have not signed it. However, nothing else grants you permission to modify or distribute the Program or its derivative works. These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or works based on it. 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License. 7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not limited to patent issues), conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not distribute the Program at all. For example, if a patent license would not permit royalty-free redistribution of the Program by all those who receive copies directly or indirectly through you, then the only way you could satisfy both it and this License would be to refrain entirely from distribution of the Program. If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of the section is intended to apply and the section as a whole is intended to apply in other circumstances. It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims; this section has the sole purpose of protecting the integrity of the free software distribution system, which is implemented by public license practices. Many people have made generous contributions to the wide range of software distributed through that system in reliance on consistent application of that system; it is up to the author/donor to decide if he or she is willing to distribute software through any other system and a licensee cannot impose that choice. This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License. 8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License. 9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) 19yy This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) 19yy name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Library General Public License instead of this License. driftnet-1.1.2/CREDITS000066400000000000000000000013421221437526200143560ustar00rootroot00000000000000Credits and contributors for driftnet $Id: CREDITS,v 1.9 2004/04/26 14:42:36 chris Exp $ Thanks to the authors of EtherPEG, for a cool idea, and to Eric Richardson, whose website brought it to my attention. Theo Honohan and Benjamin Ritcey assisted me in tracking down some bugs. Others certainly remain. Jamie Zawinski for helpful suggestions and webcollage integration. Eric Dobbs for fixing some portability issues and getting driftnet running on Solaris and BSD systems. Drew Roedersheimer for contributing PNG support. Joshua Wright for some 802.11 fixes. Rob Timko and Joshua Wright for getting Driftnet working on wireless networks and reading decrypted data from Kismet. Bastien Nocera for updating driftnet to use GTK2. driftnet-1.1.2/Changelog000066400000000000000000000062531221437526200151560ustar00rootroot00000000000000Changelog for driftnet 1.1.1 Fix compile error on freebsd 1.1 Look in HTTP POST too Create pidfile Add radiotap and 802.11 headers support 1.0 Add ipv6 support Based on work of Sebastien Decugis. See https://bugs.launchpad.net/ubuntu/+source/driftnet/+bug/16279 Update TODO file Update manual Deal better with libpng errors Fix memstr() implementation non-working on 64bit systems. Taken from: https://bugzilla.redhat.com/show_bug.cgi?id=201412 Do not delete temporary files in adjunct mode Fix typo in button press_press-release Change window initial size Refactor source-files structure Refactor code Update 'is_tempfile()' with png media file extension Refactor options handling code Improve logging code Changes in temporary directory code Fix compiler warnings Update build system to Autotools - remove makedepend - configure-time option to disable the display window - link against GTK libraries only if we need them - make endian test more portable - more portable sleep function - other minor changes Switch from CVS to git 0.1.6+cvs20040426 PNG support Driftnet now uses GTK2, rather than GTK1. Added support for reading packets from a pcap dump file (thanks to Rob Timko and Joshua Wright for this); and for extracting URLs from HTTP requests (not yet exposed in the user interface). Driftnet will now discard connections after 8Mb of data has been transferred. Fixed adjunct mode so that stdout is line-buffered, following a suggestion by Jonas Jensen. 0.1.6 Changed the algorithm used to search for image start blocks to Boyer-Moore, for a performance improvement. Fixed some build errors. 0.1.5 Allow user to save images by clicking on them. Driftnet now exits more cleanly on interrupt. Various minor bug fixes, including an endianness problem in the display code. The temporary directory used by driftnet may now be specified as a command-line option; otherwise, it is created dynamically. Added the -a (adjunct) and various related options to make it easy to use driftnet as a back-end for some other program, such as webcollage. It is now possible to compile a back-end only version of driftnet without any X11 support by using the NO_DISPLAY_WINDOW option at compile time. Added the -s option to extract MPEG audio data from network streams, along with a ghastly mess of threads and pipes to allow driftnet to play the data to play through mpg123 or similar. Changed some things to make driftnet a bit more portable to non-Linux systems. 0.1.4 Minor bug fixes. Driftnet now tests for the existence of /tmp/imgdump, which should eliminate most of my support mail.... 0.1.3 Fixed serious bugs in stream capture code, and tidied up same. Added command-line options for selecting interfaces, verbosity etc. Made window resizing neater (it now no longer results in erasing the contents of the window). Added cleaner shutdown and signal handling. Removed vestigial dependencies upon libpnm. 0.1.2 Various bug fixes. 0.1.1 CHANGES file created. Minor bugfixes (including preventing the program from quitting when it times out waiting for a packet). driftnet-1.1.2/INSTALL000066400000000000000000000366071221437526200144030ustar00rootroot00000000000000Installation Instructions ************************* Copyright (C) 1994-1996, 1999-2002, 2004-2013 Free Software Foundation, Inc. Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. This file is offered as-is, without warranty of any kind. Basic Installation ================== Briefly, the shell commands `./configure; make; make install' should configure, build, and install this package. The following more-detailed instructions are generic; see the `README' file for instructions specific to this package. Some packages provide this `INSTALL' file but do not implement all of the features documented below. The lack of an optional feature in a given package is not necessarily a bug. More recommendations for GNU packages can be found in *note Makefile Conventions: (standards)Makefile Conventions. The `configure' shell script attempts to guess correct values for various system-dependent variables used during compilation. It uses those values to create a `Makefile' in each directory of the package. It may also create one or more `.h' files containing system-dependent definitions. Finally, it creates a shell script `config.status' that you can run in the future to recreate the current configuration, and a file `config.log' containing compiler output (useful mainly for debugging `configure'). It can also use an optional file (typically called `config.cache' and enabled with `--cache-file=config.cache' or simply `-C') that saves the results of its tests to speed up reconfiguring. Caching is disabled by default to prevent problems with accidental use of stale cache files. If you need to do unusual things to compile the package, please try to figure out how `configure' could check whether to do them, and mail diffs or instructions to the address given in the `README' so they can be considered for the next release. If you are using the cache, and at some point `config.cache' contains results you don't want to keep, you may remove or edit it. The file `configure.ac' (or `configure.in') is used to create `configure' by a program called `autoconf'. You need `configure.ac' if you want to change it or regenerate `configure' using a newer version of `autoconf'. The simplest way to compile this package is: 1. `cd' to the directory containing the package's source code and type `./configure' to configure the package for your system. Running `configure' might take a while. While running, it prints some messages telling which features it is checking for. 2. Type `make' to compile the package. 3. 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On MacOS X 10.5 and later systems, you can create libraries and executables that work on multiple system types--known as "fat" or "universal" binaries--by specifying multiple `-arch' options to the compiler but only a single `-arch' option to the preprocessor. Like this: ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \ CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \ CPP="gcc -E" CXXCPP="g++ -E" This is not guaranteed to produce working output in all cases, you may have to build one architecture at a time and combine the results using the `lipo' tool if you have problems. Installation Names ================== By default, `make install' installs the package's commands under `/usr/local/bin', include files under `/usr/local/include', etc. You can specify an installation prefix other than `/usr/local' by giving `configure' the option `--prefix=PREFIX', where PREFIX must be an absolute file name. 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However, some platforms have known limitations with the semantics of shared libraries that end up requiring recompilation when using this method, particularly noticeable in packages that use GNU Libtool. The second method involves providing the `DESTDIR' variable. For example, `make install DESTDIR=/alternate/directory' will prepend `/alternate/directory' before all installation names. The approach of `DESTDIR' overrides is not required by the GNU Coding Standards, and does not work on platforms that have drive letters. On the other hand, it does better at avoiding recompilation issues, and works well even when some directory options were not specified in terms of `${prefix}' at `configure' time. Optional Features ================= If the package supports it, you can cause programs to be installed with an extra prefix or suffix on their names by giving `configure' the option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'. 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So, if you need `/usr/ucb' in your `PATH', put it _after_ `/usr/bin'. On Haiku, software installed for all users goes in `/boot/common', not `/usr/local'. It is recommended to use the following options: ./configure --prefix=/boot/common Specifying the System Type ========================== There may be some features `configure' cannot figure out automatically, but needs to determine by the type of machine the package will run on. Usually, assuming the package is built to be run on the _same_ architectures, `configure' can figure that out, but if it prints a message saying it cannot guess the machine type, give it the `--build=TYPE' option. TYPE can either be a short name for the system type, such as `sun4', or a canonical name which has the form: CPU-COMPANY-SYSTEM where SYSTEM can have one of these forms: OS KERNEL-OS See the file `config.sub' for the possible values of each field. 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Until the limitation is lifted, you can use this workaround: CONFIG_SHELL=/bin/bash ./configure CONFIG_SHELL=/bin/bash `configure' Invocation ====================== `configure' recognizes the following options to control how it operates. `--help' `-h' Print a summary of all of the options to `configure', and exit. `--help=short' `--help=recursive' Print a summary of the options unique to this package's `configure', and exit. The `short' variant lists options used only in the top level, while the `recursive' variant lists options also present in any nested packages. `--version' `-V' Print the version of Autoconf used to generate the `configure' script, and exit. `--cache-file=FILE' Enable the cache: use and save the results of the tests in FILE, traditionally `config.cache'. FILE defaults to `/dev/null' to disable caching. `--config-cache' `-C' Alias for `--cache-file=config.cache'. `--quiet' `--silent' `-q' Do not print messages saying which checks are being made. To suppress all normal output, redirect it to `/dev/null' (any error messages will still be shown). `--srcdir=DIR' Look for the package's source code in directory DIR. Usually `configure' can determine that directory automatically. `--prefix=DIR' Use DIR as the installation prefix. *note Installation Names:: for more details, including other options available for fine-tuning the installation locations. `--no-create' `-n' Run the configure checks, but stop before creating any output files. `configure' also accepts some other, not widely useful, options. 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It is an horrific invasion of privacy and shouldn't be used by anyone anywhere. It can also extract MPEG audio data from the network and play it. If you live in a house with thick walls, this may be a useful way to find out about your neighbours' musical taste. To compile, read the Makefile and make any changes required, then type `make' and fix the errors which get displayed. Driftnet is at a very early stage of development and probably won't work for you at all. You will need libpcap, libjpeg and libungif. On most Linux distributions these are available as packages. If you don't want a version of driftnet which will display images itself, but just want to use it to gather images for some other application, you only need libpcap -- see comments in the Makefile for more information. To play MPEG audio, you need an MPEG player-- by default, driftnet will use mpg123. Driftnet needs to run with sufficient privilege to obtain raw packets from the network. On most systems, this means running it as root. You can use Driftnet to sniff images passing over a wireless network. However, Driftnet does not understand the optional WEP encryption used with wireless ethernet. Instead, you can use Kismet, from http://www.kismetwireless.net/ to decrypt packets and pass them into a named pipe; the -f option can then be used to have Driftnet read the packets from the pipe. Thanks to Rob Timko and Joshua Wright for pointing this out; Rob's page, http://68.38.68.127:81/writings/driftnet.html describes the process in greater detail. If you find this program entertaining, you might want to help me develop it. The TODO file contains a list of yet-to-be-done ideas. Driftnet is licensed under the GNU GPL. See the file COPYING in the distribution. driftnet-1.1.2/TODO000066400000000000000000000013211221437526200140230ustar00rootroot00000000000000TODO for driftnet * More intelligent layout algorithm for images. * Memory leaks? Buffer overruns? Static-sized buffers. * Parse JPEG files properly -- the lame memstr(..., "\xff\xd9") thing is broken and should be done right. At the moment, some JPEG files get truncated in a really bad way. An alternative is to store more state for JPEG files, and do special parsing when we know a connection has closed. * Problem with some greyscale JPEG files. * More portability / bug fixes. * Web-based version. Server push? 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"$@" || exit $? # Remove the call to Libtool. if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi # Remove '-o $object'. IFS=" " for arg do case $arg in -o) shift ;; $object) shift ;; *) set fnord "$@" "$arg" shift # fnord shift # $arg ;; esac done "$@" -E \ | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \ -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \ | sed '$ s: \\$::' > "$tmpdepfile" rm -f "$depfile" echo "$object : \\" > "$depfile" cat < "$tmpdepfile" >> "$depfile" sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; msvisualcpp) # Important note: in order to support this mode, a compiler *must* # always write the preprocessed file to stdout. "$@" || exit $? # Remove the call to Libtool. if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi IFS=" " for arg do case "$arg" in -o) shift ;; $object) shift ;; "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI") set fnord "$@" shift shift ;; *) set fnord "$@" "$arg" shift shift ;; esac done "$@" -E 2>/dev/null | sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile" rm -f "$depfile" echo "$object : \\" > "$depfile" sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile" echo "$tab" >> "$depfile" sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile" rm -f "$tmpdepfile" ;; msvcmsys) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; none) exec "$@" ;; *) echo "Unknown depmode $depmode" 1>&2 exit 1 ;; esac exit 0 # Local Variables: # mode: shell-script # sh-indentation: 2 # eval: (add-hook 'write-file-hooks 'time-stamp) # time-stamp-start: "scriptversion=" # time-stamp-format: "%:y-%02m-%02d.%02H" # time-stamp-time-zone: "UTC" # time-stamp-end: "; # UTC" # End: driftnet-1.1.2/driftnet.1.in000066400000000000000000000101501221437526200156410ustar00rootroot00000000000000.TH DRIFTNET 1 .\" .\" driftnet.1.in: .\" Manual page for driftnet. .\" .\" Copyright (c) 2002 Chris Lightfoot. .\" Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ .\" .\" $Id: driftnet.1.in,v 1.7 2004/04/26 14:42:36 chris Exp $ .\" .SH NAME driftnet - capture images from network traffic and display them in an X window; optionally, capture audio streams and play them. .SH SYNOPSIS \fBdriftnet\fP [\fIoptions\fP] [\fIfilter code\fP] .SH DESCRIPTION \fBDriftnet\fP watches network traffic, and picks out and displays JPEG and GIF images for display. It is an horrific invasion of privacy and shouldn't be used by anyone anywhere. It has been described as `a graphical .BR tcpdump (8)', `\fIEtherPeg\fP for Unix', and called all sorts of nasty names by people on \fIFreshmeat\fP. It is also possible to use \fBdriftnet\fP to capture MPEG audio data from the network and play it through a player such as .BR mpg123 (1). Images may be saved by clicking on them. .SH OPTIONS .TP \fB-h\fP Print a summary of usage. .TP \fB-v\fP Print additional details of packets captured to the terminal. .TP \fB-b\fP Beep when a new image is displayed. .TP \fB-i\fP \fIinterface\fP Listen to packets on \fIinterface\fP. By default, \fBdriftnet\fP will try to pick up traffic on all interfaces, but this does not work with all versions of .BR pcap (3); on such systems, an interface must be specified. On some systems, \fBdriftnet\fP can only use promiscuous mode if an interface is specified. .TP \fB-f\fP \fIfile\fP Instead of listening on an interface, read captured packets from a .BR pcap (3); dump \fIfile\fP; \fIfile\fP can be a named pipe for use with Kismet or similar. .TP \fB-p\fP Do not put the interface into promiscuous mode. .TP \fB-a\fP Operate in `adjunct mode', where \fBdriftnet\fP gathers images for use by another program, such as Jamie Zawinski's \fBwebcollage\fP. In this mode, no window is displayed; images are captured and saved in a temporary directory, and their names written on standard output. .TP \fB-m\fP \fInumber\fP In adjunct mode, silently drop images if there are more than \fInumber\fP in the temporary directory. It is assumed that another process will delete images which it has processed. .TP \fB-x\fP \fIprefix\fP The filename prefix to use when saving images, by default `driftnet-'. .TP \fB-d\fP \fIdirectory\fP Use \fIdirectory\fP to store temporary files. \fBDriftnet\fP will clear this directory of its own temporary files on exit, but will not delete the directory or any other files. .TP \fB-s\fP Attempt to capture streamed audio data from the network, and either play it or, in adjunct mode, save it in files. At present this only works with MPEG data. .TP \fB-S\fP Capture streamed audio data only, ignoring images. .TP \fB-M\fP \fIcommand\fP Use the named \fIcommand\fP to play MPEG audio data. The \fIcommand\fP, which is executed using the shell, should accept MPEG frames on standard input. The default is `mpg123 -'. .TP \fIfilter code\fP Additional filter code to restrict the packets captured, in the libpcap syntax. User filter code is evaluated as `tcp and (\fIfilter code\fP)'. .SH SEE ALSO .BR tcpdump (8), .BR pcap (3), .BR webcollage (1), .BR mpg123 (1), .br .IR http://www.etherpeg.org/ , .br .IR http://freshmeat.net/projects/driftnet/ , .br .IR http://www.ex-parrot.com/~chris/driftnet/ . .SH AUTHOR Chris Lightfoot .SH VERSION \fBDriftnet\fP, version @@@VERSION@@@. .br $Id: driftnet.1.in,v 1.7 2004/04/26 14:42:36 chris Exp $ .SH COPYING This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. 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Generated from configure.ac by autoheader. */ /* Define if byte order is big endian. */ #undef DRIFTNET_BIG_ENDIAN /* Define if byte order is litle endian. */ #undef DRIFTNET_LITTLE_ENDIAN /* Define to 1 if you have the header file. */ #undef HAVE_ARPA_INET_H /* Define to 1 if you have the `dup2' function. */ #undef HAVE_DUP2 /* Define to 1 if you have the header file. */ #undef HAVE_FCNTL_H /* Define to 1 if you have the `fork' function. */ #undef HAVE_FORK /* Define to 1 if you have the `inet_ntoa' function. */ #undef HAVE_INET_NTOA /* Define to 1 if you have the header file. */ #undef HAVE_INTTYPES_H /* Define to 1 if you have the `gdk-x11-2.0' library (-lgdk-x11-2.0). */ #undef HAVE_LIBGDK_X11_2_0 /* Define to 1 if you have the `gif' library (-lgif). */ #undef HAVE_LIBGIF /* Define to 1 if you have the `glib-2.0' library (-lglib-2.0). */ #undef HAVE_LIBGLIB_2_0 /* Define to 1 if you have the `gobject-2.0' library (-lgobject-2.0). */ #undef HAVE_LIBGOBJECT_2_0 /* Define to 1 if you have the `gtk-x11-2.0' library (-lgtk-x11-2.0). */ #undef HAVE_LIBGTK_X11_2_0 /* Define to 1 if you have the `jpeg' library (-ljpeg). */ #undef HAVE_LIBJPEG /* Define to 1 if you have the `pcap' library (-lpcap). */ #undef HAVE_LIBPCAP /* Define to 1 if you have the `png' library (-lpng). */ #undef HAVE_LIBPNG /* Define to 1 if you have the `pthread' library (-lpthread). */ #undef HAVE_LIBPTHREAD /* Define to 1 if you have the header file. */ #undef HAVE_LIMITS_H /* Define to 1 if your system has a GNU libc compatible `malloc' function, and to 0 otherwise. */ #undef HAVE_MALLOC /* Define to 1 if you have the `memchr' function. */ #undef HAVE_MEMCHR /* Define to 1 if you have the header file. */ #undef HAVE_MEMORY_H /* Define to 1 if you have the `memset' function. */ #undef HAVE_MEMSET /* Define to 1 if you have the `mkdir' function. */ #undef HAVE_MKDIR /* Define to 1 if you have the `nanosleep' function. */ #undef HAVE_NANOSLEEP /* Define to 1 if you have the header file. */ #undef HAVE_NETINET_IN_H /* Define to 1 if your system has a GNU libc compatible `realloc' function, and to 0 otherwise. */ #undef HAVE_REALLOC /* Define to 1 if you have the `rmdir' function. */ #undef HAVE_RMDIR /* Define to 1 if you have the header file. */ #undef HAVE_STDINT_H /* Define to 1 if you have the header file. */ #undef HAVE_STDLIB_H /* Define to 1 if you have the `strcasecmp' function. */ #undef HAVE_STRCASECMP /* Define to 1 if you have the `strchr' function. */ #undef HAVE_STRCHR /* Define to 1 if you have the `strdup' function. */ #undef HAVE_STRDUP /* Define to 1 if you have the `strerror' function. */ #undef HAVE_STRERROR /* Define to 1 if you have the header file. */ #undef HAVE_STRINGS_H /* Define to 1 if you have the header file. */ #undef HAVE_STRING_H /* Define to 1 if you have the `strncasecmp' function. */ #undef HAVE_STRNCASECMP /* Define to 1 if you have the `strrchr' function. */ #undef HAVE_STRRCHR /* Define to 1 if you have the header file. */ #undef HAVE_SYS_SOCKET_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_STAT_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_TIME_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_TYPES_H /* Define to 1 if you have the header file. */ #undef HAVE_UNISTD_H /* Define to 1 if you have the `usleep' function. */ #undef HAVE_USLEEP /* Define to 1 if you have the `vfork' function. */ #undef HAVE_VFORK /* Define to 1 if you have the header file. */ #undef HAVE_VFORK_H /* Define to 1 if `fork' works. */ #undef HAVE_WORKING_FORK /* Define to 1 if `vfork' works. */ #undef HAVE_WORKING_VFORK /* Compile without support for a display window */ #undef NO_DISPLAY_WINDOW /* Name of package */ #undef PACKAGE /* Define to the address where bug reports for this package should be sent. */ #undef PACKAGE_BUGREPORT /* Define to the full name of this package. */ #undef PACKAGE_NAME /* Define to the full name and version of this package. */ #undef PACKAGE_STRING /* Define to the one symbol short name of this package. */ #undef PACKAGE_TARNAME /* Define to the home page for this package. */ #undef PACKAGE_URL /* Define to the version of this package. */ #undef PACKAGE_VERSION /* Define to 1 if you have the ANSI C header files. */ #undef STDC_HEADERS /* Version number of package */ #undef VERSION /* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most significant byte first (like Motorola and SPARC, unlike Intel). */ #if defined AC_APPLE_UNIVERSAL_BUILD # if defined __BIG_ENDIAN__ # define WORDS_BIGENDIAN 1 # endif #else # ifndef WORDS_BIGENDIAN # undef WORDS_BIGENDIAN # endif #endif /* Define for Solaris 2.5.1 so the uint32_t typedef from , , or is not used. If the typedef were allowed, the #define below would cause a syntax error. */ #undef _UINT32_T /* Define for Solaris 2.5.1 so the uint8_t typedef from , , or is not used. If the typedef were allowed, the #define below would cause a syntax error. */ #undef _UINT8_T /* Define to `__inline__' or `__inline' if that's what the C compiler calls it, or to nothing if 'inline' is not supported under any name. */ #ifndef __cplusplus #undef inline #endif /* Define to rpl_malloc if the replacement function should be used. */ #undef malloc /* Define to `int' if does not define. */ #undef pid_t /* Define to rpl_realloc if the replacement function should be used. */ #undef realloc /* Define to `unsigned int' if does not define. */ #undef size_t /* Define to `int' if does not define. */ #undef ssize_t /* Define to the type of an unsigned integer type of width exactly 16 bits if such a type exists and the standard includes do not define it. */ #undef uint16_t /* Define to the type of an unsigned integer type of width exactly 32 bits if such a type exists and the standard includes do not define it. */ #undef uint32_t /* Define to the type of an unsigned integer type of width exactly 8 bits if such a type exists and the standard includes do not define it. */ #undef uint8_t /* Define as `fork' if `vfork' does not work. */ #undef vfork driftnet-1.1.2/src/connection.c000066400000000000000000000135641221437526200164410ustar00rootroot00000000000000/* * connection.c: * Connection objects. * * Copyright (c) 2002 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #ifdef HAVE_CONFIG_H #include #endif #include "compat.h" #include #include #include #include /* On many systems (Darwin...), stdio.h is a prerequisite. */ #include #include #include "util.h" #include "media.h" #include "driftnet.h" #include "connection.h" /* slots for storing information about connections */ connection *slots = NULL; unsigned int slotsused, slotsalloc=0; static char* print_ipport_pair(const struct sockaddr *addr, char *buf, size_t buf_len); void connection_alloc_slots(void) { slotsused = 0; slotsalloc = 64; slots = (connection*) xcalloc(slotsalloc, sizeof(connection)); } void connection_free_slots(void) { connection *C; for (C = slots; C < slots + slotsalloc; ++C) { if (*C) connection_delete(*C); } xfree(slots); } /* alloc_connection: * Find a free slot in which to allocate a connection object. */ connection *alloc_connection(void) { connection *C; for (C = slots; C < slots + slotsalloc; ++C) { if (!*C) return C; } /* No connection slots left. */ slots = (connection*) xrealloc(slots, slotsalloc * 2 * sizeof(connection)); memset(slots + slotsalloc, 0, slotsalloc * sizeof(connection)); C = slots + slotsalloc; slotsalloc *= 2; return C; } /* * Find a connection running between the two named addresses. */ connection *find_connection(const struct sockaddr *src, const struct sockaddr *dst) { connection *C; for (C = slots; C < slots + slotsalloc; ++C) { connection c = *C; if (c && memcmp(&(c->src), src, sizeof(struct sockaddr_storage)) == 0 && memcmp(&(c->dst), dst, sizeof(struct sockaddr_storage)) == 0) return C; } return NULL; } /* * Return a string of the form w.x.y.z:foo -> a.b.c.d:bar for a pair of * addresses and ports. */ char *connection_string(const struct sockaddr *src, const struct sockaddr *dst) { #define CONNECTION_STRING_LEN 272 /* 272 = (128 (ipv6 max) * 2) 16 */ static char buf[CONNECTION_STRING_LEN]; size_t len = CONNECTION_STRING_LEN; char *p; p = buf; //bzero(p, CONNECTION_STRING_LEN); print_ipport_pair(src, p, len); len = strlen(buf); p = buf + len; snprintf(p, 5, " -> "); len = strlen(buf); p = buf + len; print_ipport_pair(dst, p, CONNECTION_STRING_LEN - len); return buf; } char* print_ipport_pair(const struct sockaddr *addr, char *buf, size_t buf_len) { struct sockaddr_in *v4; struct sockaddr_in6 *v6; int port; size_t plen; char *p = buf; switch (addr->sa_family) { case AF_INET: v4 = (struct sockaddr_in *)addr; inet_ntop(v4->sin_family, &v4->sin_addr.s_addr, buf, buf_len); port = ntohs(v4->sin_port); break; case AF_INET6: v6 = (struct sockaddr_in6 *)addr; inet_ntop(v6->sin6_family, &v6->sin6_addr.s6_addr, buf, buf_len); port = ntohs(v6->sin6_port); break; default: snprintf(buf, buf_len, "(unknown family)"); port = 0; } plen = strlen(buf); p += plen; snprintf(p, buf_len - plen, ":%d", port); return buf; } /* sweep_connections: * Free finished connection slots. */ #define TIMEOUT 5 #define MAXCONNECTIONDATA (8 * 1024 * 1024) void sweep_connections(void) { time_t now; connection *C; now = time(NULL ); for (C = slots; C < slots + slotsalloc; ++C) { if (*C) { connection c = *C; /* We discard connections which have seen no activity for TIMEOUT * or for which a FIN has been seen and for which there are no * gaps in the stream, or where more than MAXCONNECTIONDATA have * been captured. */ if ((now - c->last) > TIMEOUT || (c->fin && (!c->blocks || !c->blocks->next)) || c->len > MAXCONNECTIONDATA) { extract_media(c); connection_delete(c); *C = NULL; } } } } /* connection_new SOURCE DEST SPORT DPORT * Allocate a new connection structure for data sent from SOURCE:SPORT to * DEST:DPORT. */ connection connection_new(const struct sockaddr *src, const struct sockaddr *dst) { connection c; alloc_struct(_connection, c); memcpy(&c->src, src, sizeof(struct sockaddr_storage)); memcpy(&c->dst, dst, sizeof(struct sockaddr_storage)); c->alloc = 16384; c->data = xmalloc(c->alloc); c->last = time(NULL ); c->blocks = NULL; return c; } /* connection_delete CONNECTION * Free CONNECTION. */ void connection_delete(connection c) { struct datablock *b; for (b = c->blocks; b;) { struct datablock *b2; b2 = b->next; free(b); b = b2; } free(c->data); free(c); } /* connection_push CONNECTION DATA OFFSET LENGTH * Add LENGTH bytes of DATA received at OFFSET in the stream to CONNECTION. */ void connection_push(connection c, const unsigned char *data, unsigned int off, unsigned int len) { struct datablock *B, *b, *bl, BZ = { 0 }; int a; assert(c->alloc > 0); if (off + len > c->alloc) { /* Allocate more memory. */ do c->alloc *= 2; while (off + len > c->alloc); c->data = (unsigned char*) xrealloc(c->data, c->alloc); } memcpy(c->data + off, data, len); if (off + len > c->len) c->len = off + len; c->last = time(NULL ); B = xmalloc(sizeof *B); *B = BZ; B->off = off; B->len = len; B->dirty = 1; B->next = NULL; /* Insert the block into the sorted block list. */ for (b = c->blocks, bl = NULL ;; bl = b, b = b->next) { if ((!b || off <= b->off) && (!bl || off > bl->off)) { B->next = b; if (bl) bl->next = B; else c->blocks = B; break; } } /* Now go through the list combining blocks. */ do { a = 0; for (b = c->blocks; b; b = b->next) { if (b->next && b->off + b->len >= b->next->off) { struct datablock *bb; bb = b->next; b->len = (bb->off + bb->len) - b->off; b->next = bb->next; b->dirty = 1; free(bb); ++a; } } } while (a); } driftnet-1.1.2/src/connection.h000066400000000000000000000047371221437526200164500ustar00rootroot00000000000000/* * Connection.h: * Connection handling. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * * Copyright (c) 2002 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #ifndef __CONNECTION_H__ #define __CONNECTION_H__ #ifdef HAVE_CONFIG_H #include #endif #include #include /* On many systems (Darwin...), stdio.h is a prerequisite. */ #include /* On Darwin, stdlib.h is a prerequisite. */ #include /* needs to be before on OpenBSD */ #include #ifdef HAVE_LIMITS_H #include #endif #include #include #include struct datablock; /* * Object representing one half of a TCP stream connection. Each connection * maintains a record of the data which has been recovered from the network * and a list of blocks of data which represent valid data in the buffer, so * that if there is a gap in the received data, we don't search it for * data. */ typedef struct _connection { /* Source/destination address/port of this half-duplex connection. */ struct sockaddr_storage src, dst; /* The TCP initial-sequence-number of the connection. */ uint32_t isn; /* The highest offset and the buffer size allocated, and the buffer * itself. */ unsigned int len, alloc; unsigned char *data; /* Flag indicating that we've seen a FIN-flagged segment for this stream, * so that it is undergoing a shutdown. */ int fin; /* The time at which we last received any data on this stream. */ time_t last; /* A list of the extents in the buffer which contain valid data. */ struct datablock *blocks; } *connection; void connection_alloc_slots(void); void connection_free_slots(void); connection connection_new(const struct sockaddr *src, const struct sockaddr *dst); void connection_delete(connection c); void connection_push(connection c, const unsigned char *data, unsigned int off, unsigned int len); connection *alloc_connection(void); connection *find_connection(const struct sockaddr *src, const struct sockaddr *dst); char *connection_string(const struct sockaddr *s, const struct sockaddr *d); void sweep_connections(void); #include "media.h" /* NMEDIATYPES */ /* * Represents an extent in a captured stream. */ struct datablock { int off, len, moff[NMEDIATYPES], dirty; struct datablock *next; }; #endif /* __CONNECTION_H__ */ driftnet-1.1.2/src/display/000077500000000000000000000000001221437526200155725ustar00rootroot00000000000000driftnet-1.1.2/src/display/Makefile.am000066400000000000000000000003631221437526200176300ustar00rootroot00000000000000 noinst_LIBRARIES = libdisplay.a libdisplay_a_SOURCES = display.c display.h img.c img.h gif.c jpeg.c png.c AM_CFLAGS = -Wall AM_CFLAGS += @GTK_CFLAGS@ AM_CFLAGS += -I$(top_srcdir)/src AM_CFLAGS += -I$(top_srcdir)/src/media # for pngformat.h driftnet-1.1.2/src/display/Makefile.in000066400000000000000000000373321221437526200176470ustar00rootroot00000000000000# Makefile.in generated by automake 1.13.3 from Makefile.am. # @configure_input@ # Copyright (C) 1994-2013 Free Software Foundation, Inc. # This Makefile.in is free software; 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WWW: http://www.ex-parrot.com/~chris/ * */ #ifdef HAVE_CONFIG_H #include #endif #include "compat.h" #include #include #include #include #include /* On many systems (Darwin...), stdio.h is a prerequisite. */ #include #include #include #include #include #include #include #include "util.h" #include "log.h" #include "tmpdir.h" #include "img.h" #include "driftnet.h" #include "display.h" /* The border, in pixels, around images displayed in the window. */ #define BORDER 6 #define DEFAULT_WIDTH 320 #define DEFAULT_HEIGHT 240 static int imgpipe_readfd; static int imgpipe_writefd; static int beep_on_image; static char *savedimg_prefix; static GtkWidget *window, *darea; static GdkWindow *drawable; static int width, height, wrx, wry, rowheight; static img backing_image; struct imgrect { char *filename; int x, y, w, h; }; static int nimgrects; static struct imgrect *imgrects; static void do_gtkdisplay(void); void display_send_img(const char *name, size_t len) { write(imgpipe_writefd, name, len); } void do_image_display(char *img_prefix, int beep) { /* PID of display child and file descriptor on pipe to same. */ pid_t dpychld; int pfd[2]; pipe(pfd); switch (dpychld = fork()) { case 0: /* we are the child */ close (pfd[1]); imgpipe_readfd = pfd[0]; beep_on_image = beep; savedimg_prefix = img_prefix; do_gtkdisplay(); unexpected_exit (-1); /* not reached */ case -1: log_msg(LOG_ERROR, "fork failed, reason: %s", strerror(errno)); //log_msg(LOG_FATAL, "fork failed"); unexpected_exit (-1); default: close (pfd[0]); imgpipe_writefd = pfd[1]; log_msg(LOG_INFO, "started display child, pid %d", (int)dpychld); return; } return; } gint delete_event(GtkWidget *widget, GdkEvent *event, gpointer data) { log_msg(LOG_INFO, "display child shutting down\n"); return FALSE; /* do destroy window */ } /* make_backing_image: * Create the img structure which represents our back-buffer. */ void make_backing_image() { img I; I = img_new_blank(width, height); img_alloc(I); /* wry += height - backing_image->height; if (wry < BORDER || wry > height - BORDER) wry = height - BORDER;*/ if (backing_image) { int w2, h2; struct imgrect *ir; /* Copy old contents of backing image to ll corner of new one. */ w2 = backing_image->width; if (w2 > width) w2 = width; h2 = backing_image->height; if (h2 > height) h2 = height; img_simple_blt(I, 0, height - h2, backing_image, 0, backing_image->height - h2, w2, h2); /* Move all of the image rectangles. */ for (ir = imgrects; ir < imgrects + nimgrects; ++ir) { if (ir->filename) { ir->y += height - backing_image->height; /* Possible it has scrolled off the window. */ if (ir->x > width || ir->y + ir->h < 0) { unlink(ir->filename); xfree(ir->filename); memset(ir, 0, sizeof *ir); } } } /* Adjust placement of new images. */ if (wrx >= w2) wrx = w2; img_delete(backing_image); } backing_image = I; wrx = BORDER; wry = height - BORDER; rowheight = 2 * BORDER; } /* update_window: * Copy the backing image onto the window. */ void update_window() { if (backing_image) { GdkGC *gc; gc = gdk_gc_new(drawable); gdk_draw_rgb_32_image(drawable, gc, 0, 0, width, height, GDK_RGB_DITHER_NORMAL, (guchar*)backing_image->flat, sizeof(pel) * width); g_object_unref(gc); } } /* scroll_backing_image: * Scroll the image up a bit, to make room for a new image. */ void scroll_backing_image(const int dy) { pel **row1, **row2; struct imgrect *ir; for (row1 = backing_image->data, row2 = backing_image->data + dy; row2 < backing_image->data + height; ++row1, ++row2) memcpy(*row1, *row2, width * sizeof(pel)); for (row2 = row1; row2 < backing_image->data + height; ++row2) memset(*row2, 0, width * sizeof(pel)); for (ir = imgrects; ir < imgrects + nimgrects; ++ir) { if (ir->filename) { ir->y -= dy; /* scrolled off bottom, no longer in use. */ if ((ir->y + ir->h) < 0) { unlink(ir->filename); xfree(ir->filename); memset(ir, 0, sizeof *ir); } } } } /* add_image_rectangle: * Add a rectangle representing the location of an image to the list, so that * we can do hit-tests against it. */ void add_image_rectangle(const char *filename, const int x, const int y, const int w, const int h) { struct imgrect *ir; for (ir = imgrects; ir < imgrects + nimgrects; ++ir) { if (!ir->filename) break; } if (ir == imgrects + nimgrects) { imgrects = xrealloc(imgrects, 2 * nimgrects * sizeof *imgrects); memset(imgrects + nimgrects, 0, nimgrects * sizeof *imgrects); ir = imgrects + nimgrects; nimgrects *= 2; } ir->filename = strdup(filename); ir->x = x; ir->y = y; ir->w = w; ir->h = h; } /* find_image_rectangle: * Find the image, if any, which contains a given point. Used for saving images * when they are clicked on. */ struct imgrect *find_image_rectangle(const int x, const int y) { struct imgrect *ir; for (ir = imgrects; ir < imgrects + nimgrects; ++ir) if (ir->filename && x >= ir->x && x < ir->x + ir->w && y >= ir->y && y < ir->y + ir->h) return ir; return NULL; } /* expose_event: * React to an expose event, perhaps changing the backing image size. */ void expose_event(GtkWidget *widget, GdkEvent *event, gpointer data) { if (darea) drawable = darea->window; gdk_drawable_get_size(GDK_DRAWABLE(drawable), &width, &height); if (!backing_image || backing_image->width != width || backing_image->height != height) make_backing_image(); update_window(); } /* configure_event: * React to a configure event, perhaps changing the backing image size. */ void configure_event(GtkWidget *widget, GdkEvent *event, gpointer data) { if (darea) drawable = darea->window; gdk_drawable_get_size(GDK_DRAWABLE(drawable), &width, &height); if (!backing_image || backing_image->width != width || backing_image->height != height) make_backing_image(); update_window(); } /* save_image: * Save an image which the user has selected. */ void save_image(struct imgrect *ir) { static char *name; static int num; int fd1, fd2; char buf[8192]; ssize_t l; struct stat st; if (!name) name = xcalloc(strlen(savedimg_prefix) + 16, 1); do sprintf(name, "%s%d%s", savedimg_prefix, num++, strrchr(ir->filename, '.')); while (stat(name, &st) == 0); log_msg(LOG_INFO, "saving `%s' as `%s'", ir->filename, name); fd1 = open(ir->filename, O_RDONLY); if (fd1 == -1) { log_msg(LOG_ERROR, "%s: %s", ir->filename, strerror(errno)); return; } fd2 = open(name, O_WRONLY | O_CREAT | O_TRUNC, 0666); if (fd2 == -1) { log_msg(LOG_ERROR, "%s: %s", name, strerror(errno)); close(fd1); return; } /* XXX interrupts */ while ((l = read(fd1, buf, sizeof buf)) > 0) { if (write(fd2, buf, l) == -1) { log_msg(LOG_ERROR, "%s: %s", name, strerror(errno)); close(fd1); close(fd2); return; } } if (l == -1) log_msg(LOG_ERROR, "%s: %s", ir->filename, strerror(errno)); close(fd1); close(fd2); } static struct { int x, y; } click; void button_press_event(GtkWidget *widget, GdkEventButton *event) { click.x = (int)event->x; click.y = (int)event->y; } void button_release_event(GtkWidget *widget, GdkEventButton *event) { struct imgrect *ir; ir = find_image_rectangle(click.x, click.y); if (ir && ir == find_image_rectangle((int)event->x, (int)event->y)) { /* We draw a little frame around the image while we're saving it, to * give some visual feedback. */ gdk_draw_rectangle(drawable, darea->style->white_gc, 0, ir->x - 2, ir->y - 2, ir->w + 3, ir->h + 3); gdk_flush(); /* force X to actually draw the damn thing. */ save_image(ir); xnanosleep(100000000); gdk_draw_rectangle(drawable, darea->style->black_gc, 0, ir->x - 2, ir->y - 2, ir->w + 3, ir->h + 3); } } void destroy(GtkWidget *widget, gpointer data) { gtk_main_quit(); } /* xread: * Like read(2) but read the whole supplied length. */ static ssize_t xread(int fd, void *buf, size_t len) { char *p; for (p = (char*)buf; p < (char*)buf + len; ) { ssize_t l; l = read(fd, p, (char*)buf + len - p); if (l == -1 && errno != EINTR) return -1; else if (l == 0) return 0; else p += l; } return len; } gboolean pipe_event(GIOChannel chan, GIOCondition cond, gpointer data) { static char *path; char name[TMPNAMELEN]; ssize_t rr; int nimgs = 0; if (!path) path = xmalloc(strlen(get_tmpdir()) + TMPNAMELEN); /* We are sent messages of size TMPNAMELEN containing a null-terminated * file name. */ while (nimgs < 4 && (rr = xread(imgpipe_readfd, name, sizeof name)) == sizeof name) { int saveimg = 0; struct stat st; ++nimgs; sprintf(path, "%s/%s", get_tmpdir(), name); if (stat(path, &st) == -1) continue; log_msg(LOG_INFO, "received image %s of size %d", name, (int)st.st_size); /* Check to see whether this looks like an image we're interested in. */ if (st.st_size > 100) { /* Small images are probably bollocks. */ img i = img_new(); if (!img_load_file(i, path, header, unknown)) log_msg(LOG_WARNING, "%s: bogus image (err = %d)", name, i->err); else { if (i->width > 8 && i->height > 8) { if (img_load(i, full, i->type)) { /* slot in the new image at some plausible place. */ int w, h; if (i->width > width - 2 * BORDER) w = width - 2 * BORDER; else w = i->width; if (i->height > height - 2 * BORDER) h = height - 2 * BORDER; else h = i->height; /* is there space on this row? */ if (width - wrx < w) { /* no */ scroll_backing_image(h + BORDER); wrx = BORDER; rowheight = h + BORDER; } if (rowheight < h + BORDER) { scroll_backing_image(h + BORDER - rowheight); rowheight = h + BORDER; } img_simple_blt(backing_image, wrx, wry - h, i, 0, 0, w, h); add_image_rectangle(path, wrx, wry - h, w, h); saveimg = 1; if (beep_on_image) write(1, "\a", 1); update_window(); wrx += w + BORDER; } else log_msg(LOG_WARNING, "%s: bogus image (err = %d)", name, i->err); } else log_msg(LOG_WARNING, "%s: image dimensions (%d x %d) too small to bother with", name, i->width, i->height); } img_delete(i); } else log_msg(LOG_WARNING, "image data too small (%d bytes) to bother with", (int)st.st_size); if (!saveimg) unlink(name); } if (rr == -1 && errno != EINTR && errno != EAGAIN) { log_msg(LOG_ERROR, "display pipe read() failed, reason: %s", strerror(errno)); gtk_main_quit(); } else if (rr == 0) { /* pipe closed, exit. */ gtk_main_quit(); } return TRUE; } static void do_gtkdisplay(void) { GIOChannel *chan; struct imgrect *ir; /* have our main loop poll the pipe file descriptor */ chan = g_io_channel_unix_new(imgpipe_readfd); g_io_add_watch(chan, G_IO_IN | G_IO_ERR | G_IO_HUP, (GIOFunc)pipe_event, NULL); fcntl(imgpipe_readfd, F_SETFL, O_NONBLOCK); /* set up list of image rectangles. */ imgrects = xcalloc(nimgrects = 16, sizeof *imgrects); /* do some init thing */ gtk_init(0, NULL); gtk_widget_push_colormap(gdk_rgb_get_colormap()); /* Make our own window. */ window = gtk_window_new(GTK_WINDOW_TOPLEVEL); gtk_widget_set_size_request(window, DEFAULT_WIDTH + 2 * BORDER, DEFAULT_HEIGHT + 2 * BORDER); darea = gtk_drawing_area_new(); gtk_container_add(GTK_CONTAINER(window), darea); gtk_widget_set_events(darea, GDK_EXPOSURE_MASK|GDK_BUTTON_PRESS_MASK|GDK_BUTTON_RELEASE_MASK); g_signal_connect(G_OBJECT(window), "delete_event", GTK_SIGNAL_FUNC(delete_event), NULL); g_signal_connect(G_OBJECT(window), "destroy", GTK_SIGNAL_FUNC(destroy), NULL); g_signal_connect(G_OBJECT(darea), "expose-event", GTK_SIGNAL_FUNC(expose_event), NULL); g_signal_connect(G_OBJECT(darea), "configure_event", GTK_SIGNAL_FUNC(expose_event), NULL); /* mouse button press/release for saving images */ g_signal_connect(G_OBJECT(darea), "button_press_event", GTK_SIGNAL_FUNC(button_press_event), NULL); g_signal_connect(G_OBJECT(darea), "button_release_event", GTK_SIGNAL_FUNC(button_release_event), NULL); gtk_widget_show_all(window); gtk_main(); /* Get rid of all remaining images. */ for (ir = imgrects; ir < imgrects + nimgrects; ++ir) if (ir->filename) unlink(ir->filename); img_delete(backing_image); gtk_exit(0); return; /* NOTREACHED */ } driftnet-1.1.2/src/display/display.h000066400000000000000000000007421221437526200174130ustar00rootroot00000000000000/* * display.h: * Display images gathered by driftnet. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * * Copyright (c) 2001 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #ifndef __DISPLAY_H__ #define __DISPLAY_H__ #ifdef HAVE_CONFIG_H #include #endif void do_image_display(char *img_prefix, int beep); void display_send_img(const char *name, size_t len); #endif /* __DISPLAY_H__ */ driftnet-1.1.2/src/display/gif.c000066400000000000000000000055411221437526200165100ustar00rootroot00000000000000/* * gif.c: * GIF file support. * * Copyright (c) 2001 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #ifdef HAVE_CONFIG_H #include #endif #include "compat.h" #include #include "img.h" /* gif_load_hdr: * Find width/height of GIF file. */ int gif_load_hdr(img I) { GifFileType *g; g = I->us = DGifOpenFileHandle(fileno(I->fp)); if (!I->us) { I->err = IE_HDRFORMAT; return 0; } I->width = g->SWidth; I->height = g->SHeight; return 1; } /* gif_abort_load: * Abort loading a GIF file after the header is done. */ int gif_abort_load(img I) { DGifCloseFile((GifFileType*)I->us); return 1; } /* gif_load_img: * Load GIF image. */ int gif_load_img(img I) { GifFileType *g = I->us; struct SavedImage *si; int ret = 0; unsigned char *p, *end; GifColorType *pal; pel *q; if (DGifSlurp(g) == GIF_ERROR) { I->err = IE_IMGFORMAT; return 0; } /* Now allocate memory and copy the image into it. */ img_alloc(I); /* Retrieve only the first image. */ if (g->ImageCount < 1) { I->err = IE_IMGFORMAT; goto fail; } si = g->SavedImages; if (si->ImageDesc.Width != I->width || si->ImageDesc.Height != I->height) { I->err = IE_IMGFORMAT; goto fail; } if (si->ImageDesc.ColorMap) pal = si->ImageDesc.ColorMap->Colors; else pal = g->SColorMap->Colors; if (si->ImageDesc.Interlace) { int i; unsigned char *gifsrc = si->RasterBits; /* Deal with deranged interlaced GIF file. */ #define COPYROW(src, dest) for (p = (src), q = (dest); p < (src) + I->width; ++p, ++q) \ *q = PELA(pal[*p].Red, pal[*p].Green, pal[*p].Blue, *p == g->SBackGroundColor ? 255 : 0); /* Pass 1: every 8th row, starting at row 0. */ for (i = 0; i < I->height; i += 8) { COPYROW(gifsrc, I->data[i]); gifsrc += I->width; } /* Pass 2: every 8th row, starting at row 4. */ for (i = 4; i < I->height; i += 8) { COPYROW(gifsrc, I->data[i]); gifsrc += I->width; } /* Pass 3: every 4th row, starting at row 2. */ for (i = 2; i < I->height; i += 4) { COPYROW(gifsrc, I->data[i]); gifsrc += I->width; } /* Pass 4: every 2nd row, starting at row 1. */ for (i = 1; i < I->height; i += 2) { COPYROW(gifsrc, I->data[i]); gifsrc += I->width; } } else for (p = (unsigned char*)si->RasterBits, end = p + I->width * I->height, q = I->flat; p < end; ++p, ++q) *q = PELA(pal[*p].Red, pal[*p].Green, pal[*p].Blue, *p == g->SBackGroundColor ? 255 : 0); ret = 1; fail: DGifCloseFile(g); return ret; } driftnet-1.1.2/src/display/img.c000066400000000000000000000202171221437526200165140ustar00rootroot00000000000000/* * img.c: * Image file type. * * Copyright (c) 2001 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #ifdef HAVE_CONFIG_H #include #endif #include #include /* On many systems (Darwin...), stdio.h is a prerequisite. */ #include #include "util.h" #include "driftnet.h" #include "img.h" #define INLINE inline #if 0 /* pnm.c */ int pnm_load_hdr(img I); int pnm_abort_load(img I); int pnm_load_img(img I); int pnm_save_img(const img I, FILE *fp); #endif /* gif.c */ int gif_load_hdr(img I); int gif_abort_load(img I); int gif_load_img(img I); /* jpeg.c */ int jpeg_load_hdr(img I); int jpeg_abort_load(img I); int jpeg_load_img(img I); int jpeg_save_img(const img I, FILE *fp); /* png.c */ int png_load_hdr(img I); /*int png_abort_load(img I);*/ int png_load_img(img I); /*int png_save_img(const img I, FILE *fp);*/ #if 0 /* raw.c */ int raw_load_img(img I); int raw_save_img(img I, FILE *fp); */ #endif /* Image file formats known about, and the routines used to load/save them. */ struct filedrv { imgtype type; char *suffices; int (*loadhdr)(img); int (*abortload)(img); int (*loadimg)(img); int (*saveimg)(const img, FILE*); } filedrvs[] = { /* {pnm, ".pnm\0.ppm\0.pgm\0.pbm\0", pnm_load_hdr, pnm_abort_load, pnm_load_img, pnm_save_img}, */ {gif, ".gif\0", gif_load_hdr, gif_abort_load, gif_load_img, NULL}, {jpeg, ".jpg\0.jpeg\0", jpeg_load_hdr, jpeg_abort_load, jpeg_load_img, jpeg_save_img}, {png, ".png\0", png_load_hdr, NULL /*png_abort_load*/, png_load_img, NULL /*png_save_img*/}, /* {raw, "", NULL, raw_load_img, NULL, raw_save_img}, */ }; #define NUMFILEDRVS (sizeof(filedrvs) / sizeof(struct filedrv)) /* img_new: * Create a new empty image object. */ img img_new(void) { img I; I = (img)xmalloc(sizeof(struct _img)); memset(I, 0, sizeof(struct _img)); return I; } /* img_new_blank: * Create a new image object. */ img img_new_blank(const unsigned int width, const unsigned int height) { img I = img_new(); I->width = width; I->height = height; I->load = header; return I; } /* img_alloc: * Allocate memory for an image object. The memory is allocated as a big * block, with pointers fixed up at the beginning. */ void img_alloc(img I) { pel **p, *q; I->data = (pel**)xcalloc(I->height * sizeof(pel*) + I->width * I->height * sizeof(pel), 1); I->flat = (pel*)(I->data + I->height); for (p = I->data, q = I->flat; p < I->data + I->height; ++p, q += I->width) *p = q; } /* img_delete: * Free memory associated with an image object. */ void img_delete(img I) { if (I->data) xfree(I->data); if (I->fp) fclose(I->fp); xfree(I); } /* img_load: * Load an image, or part of it, from the associated stream. Returns 1 on * success or 0 on failure. */ int img_load(img I, const imgstate howmuch, const imgtype type) { int i; if (type == unknown) { I->err = IE_UNKNOWNTYPE; return 0; } else if (!I->fp) { I->err = IE_NOSTREAM; return 0; } else if (howmuch == none) return 1; else for (i = 0; i < NUMFILEDRVS; ++i) if (filedrvs[i].type == type) { int r; if (howmuch == header && filedrvs[i].loadhdr) { r = filedrvs[i].loadhdr(I); if (r) I->load = howmuch; return r; } else if (filedrvs[i].loadimg) { /* May have to load header first. */ if (I->load != header && filedrvs[i].loadhdr && !filedrvs[i].loadhdr(I)) return 0; I->load = header; r = filedrvs[i].loadimg(I); if (r) I->load = full; return r; } } I->err = IE_UNKNOWNTYPE; return 0; } /* img_load_stream: * Associate an image with a stream and load something from it. */ int img_load_stream(img I, FILE *fp, const imgstate howmuch, const imgtype type) { I->fp = fp; return img_load(I, howmuch, type); } /* img_load_file: * Load an image, or part of it, from a file. */ int img_load_file(img I, const char *name, const imgstate howmuch, const imgtype type) { if (howmuch == none) return 1; I->fp = fopen(name, "rb"); if (!I->fp) { I->err = IE_SYSERROR; return 0; } if (type == unknown) { /* Try to figure out type. */ char *p; int i; p = strrchr(name, '.'); for (i = 0; i < NUMFILEDRVS; ++i) { char *q; for (q = filedrvs[i].suffices; *q; q += strlen(q) + 1) if (strcasecmp(p, q) == 0) { I->type = filedrvs[i].type; return img_load(I, howmuch, I->type); } } } else return img_load(I, howmuch, type); I->err = IE_UNKNOWNTYPE; return 0; } /* img_save_file: * Save an image in a file of the specified type. */ int img_save(const img I, FILE *fp, const imgtype type) { int i; if (type == unknown) { I->err = IE_UNKNOWNTYPE; return 0; } else for (i = 0; i < NUMFILEDRVS; ++i) if (filedrvs[i].type == type && filedrvs[i].saveimg) return filedrvs[i].saveimg(I, fp); I->err = IE_UNKNOWNTYPE; return 0; } /* img_clip_adj_x: * img_clip_adj_y: * Return an adjustment to the passed coordinate which will put it in the * clipping region for the image. */ INLINE int img_clip_adj_x(const img I, const int x) { if (x < 0) return -x; if (x >= I->width) return I->width - x; return 0; } INLINE int img_clip_adj_y(const img I, const int y) { if (y < 0) return -y; if (y >= I->height) return I->height - y; return 0; } /* img_clip: * Clip coordinates against an image. */ INLINE void img_clip(const img I, int *x, int *y) { *x += img_clip_adj_x(I, *x); *y += img_clip_adj_y(I, *y); } /* img_simple_blt: * Copy a rectangle, ignoring clipping and overlapping regions. */ INLINE void img_simple_blt(img dest, const int dx, const int dy, img src, const int sx, const int sy, const int w, const int h) { int y, y2; for (y = sy, y2 = dy; y < sy + h; ++y, ++y2) memcpy(dest->data[y2] + dx, src->data[y] + sx, w * sizeof(pel)); } #if 0 /* img_blt: * Copy a rectangle from one location to another. */ void img_blt(img dest, const int dx, const int dy, img src, const int sx, const int sy, const int w, const int h) { int srcx, srcy, destx, desty, width, height; int Dx, Dy; /* Clip the regions. */ srcx = sx; srcy = sy; destx = dx; desty = dy; width = w; height = h; /* Source TL. */ Dx = img_clip_adj_x(src, srcx); Dy = img_clip_adj_y(src, srcy); srcx += Dx; destx += Dx; srcy += Dy; desty += Dy; width -= Dx; height -= Dy; if (width <= 0 || height <= 0) return; /* Nothing to copy. */ /* Source BR. */ Dx = img_clip_adj_x(src, srcx + width - 1); Dy = img_clip_adj_y(src, srcy + height - 1); width -= Dx; height -= Dy; if (width <= 0 || height <= 0) return; /* Nothing to copy. */ /* Dest TL. */ Dx = img_clip_adj_x(dest, destx); Dy = img_clip_adj_y(dest, desty); srcx += Dx; destx += Dx; srcy += Dy; desty += Dy; width -= Dx; height -= Dy; if (width <= 0 || height <= 0) return; /* Nothing to copy. */ /* Dest BR. */ Dx = img_clip_adj_x(dest, destx + width - 1); Dy = img_clip_adj_y(dest, desty + height - 1); width -= Dx; height -= Dy; if (width <= 0 || height <= 0) return; /* Nothing to copy. */ if (dest == src) { if (srcx == destx && srcy == desty) return; else if (srcy + height < desty || desty + height < srcy || srcx + width < destx || destx + width < srcx) /* No overlap. */ img_simple_blt(dest, destx, desty, src, srcx, srcy, width, height); else { } } else /* Different images; simple copy. */ img_simple_blt(dest, destx, desty, src, srcx, srcy, width, height); } #endif driftnet-1.1.2/src/display/img.h000066400000000000000000000050561221437526200165250ustar00rootroot00000000000000/* * img.h: * Image file type. * * Copyright (c) 2001 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * * $Id: img.h,v 1.9 2003/11/03 10:40:23 chris Exp $ * */ #ifndef __IMG_H_ /* include guard */ #define __IMG_H_ #ifdef HAVE_CONFIG_H #include #endif #include "compat.h" #include typedef uint8_t chan; typedef uint32_t pel; /* Yuk. GDKRGB expects data in a specific ordering. */ #if defined(DRIFTNET_LITTLE_ENDIAN) # define PEL(r, g, b) ((pel)((chan)(r) | ((chan)(g) << 8) | ((chan)(b) << 16))) # define PELA(r, g, b, a) ((pel)((chan)(r) | ((chan)(g) << 8) | ((chan)(b) << 16) | ((chan)(a) << 24))) # define GETR(p) ((chan)(((p) & (pel)0x000000ff) )) # define GETG(p) ((chan)(((p) & (pel)0x0000ff00) >> 8)) # define GETB(p) ((chan)(((p) & (pel)0x00ff0000) >> 16)) # define GETA(p) ((chan)(((p) & (pel)0xff000000) >> 24)) #elif defined(DRIFTNET_BIG_ENDIAN) # define PEL(r, g, b) ((pel)(((chan)(r) << 24) | ((chan)(g) << 16) | ((chan)(b) << 8))) # define PELA(r, g, b, a) ((pel)(((chan)(r) << 24) | ((chan)(g) << 16) | ((chan)(b) << 8) | ((chan)(a)))) # define GETR(p) ((chan)(((p) & (pel)0xff000000) >> 24)) # define GETG(p) ((chan)(((p) & (pel)0x00ff0000) >> 16)) # define GETB(p) ((chan)(((p) & (pel)0x0000ff00) >> 8)) # define GETA(p) ((chan)(((p) & (pel)0x000000ff) )) #else # error "no endianness defined" #endif typedef enum { unknown = 0, pnm = 1, gif = 2, jpeg = 3, png = 4, raw = 5 } imgtype; typedef enum { none = 0, header = 1, full = 2 } imgstate; typedef enum { IE_OK = 0, IE_SYSERROR, IE_NOSTREAM, IE_UNKNOWNTYPE, IE_HDRFORMAT, IE_IMGFORMAT } imgerr; typedef struct _img { imgtype type; imgstate load; unsigned int width, height; pel **data, *flat; FILE *fp; void *us; imgerr err; } *img; img img_new(void); img img_new_blank(const unsigned int width, const unsigned int height); void img_alloc(img I); int img_load(img I, const imgstate howmuch, const imgtype type); int img_load_stream(img I, FILE *fp, const imgstate howmuch, const imgtype type); int img_load_file(img I, const char *name, const imgstate howmuch, const imgtype type); int img_save(const img I, FILE *fp, const imgtype type); /* img img_clone(const img I); */ void img_delete(img I); void img_simple_blt(img dest, const int dx, const int dy, img src, const int sx, const int sy, const int w, const int h); #endif /* __IMG_H_ */ driftnet-1.1.2/src/display/jpeg.c000066400000000000000000000106731221437526200166720ustar00rootroot00000000000000/* * jpeg.c: * JPEG file support. Based on example.c in the IJG jpeg-6b distribution. * * Copyright (c) 2001 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #ifdef HAVE_CONFIG_H #include #endif #include #include #include #include #include #include "util.h" #include "driftnet.h" #include "img.h" /* struct my_error_mgr: * Error handling struct for JPEG library interaction. */ struct my_error_mgr { struct jpeg_error_mgr pub; jmp_buf jb; }; /* my_error_exit: * Error handler method for JPEG library. */ static void my_error_exit(j_common_ptr cinfo) { struct my_error_mgr *e = (struct my_error_mgr*)cinfo->err; (*cinfo->err->output_message)(cinfo); longjmp(e->jb, 1); } /* jpeg_load_hdr: * Load the header of a JPEG file. */ int jpeg_load_hdr(img I) { struct jpeg_decompress_struct *cinfo; struct my_error_mgr *jerr; alloc_struct(jpeg_decompress_struct, cinfo); I->us = cinfo; alloc_struct(my_error_mgr, jerr); cinfo->err = jpeg_std_error(&jerr->pub); jerr->pub.error_exit = my_error_exit; if (setjmp(jerr->jb)) { /* Oops, something went wrong. */ I->err = IE_HDRFORMAT; jpeg_destroy_decompress(cinfo); return 0; } jpeg_create_decompress(cinfo); jpeg_stdio_src(cinfo, I->fp); /* Read the header of the image. */ jpeg_read_header(cinfo, TRUE); jpeg_start_decompress(cinfo); I->width = cinfo->output_width; I->height = cinfo->output_height; return 1; } /* jpeg_abort_load: * Abort loading a JPEG after the header is done. */ int jpeg_abort_load(img I) { jpeg_finish_decompress((struct jpeg_decompress_struct*)I->us); jpeg_destroy_decompress((struct jpeg_decompress_struct*)I->us); return 1; } /* jpeg_load_img: * Read a JPEG file into an image. */ int jpeg_load_img(img I) { struct jpeg_decompress_struct *cinfo = I->us; struct my_error_mgr *jerr; JSAMPARRAY buffer; img_alloc(I); jerr = (struct my_error_mgr*)cinfo->err; if (setjmp(jerr->jb)) { /* Oops, something went wrong. */ I->err = IE_IMGFORMAT; jpeg_destroy_decompress(cinfo); return 0; } cinfo->out_color_space = JCS_RGB; cinfo->out_color_components = cinfo->output_components = 3; /* Start decompression. */ buffer = cinfo->mem->alloc_sarray((j_common_ptr)cinfo, JPOOL_IMAGE, cinfo->output_width * cinfo->output_components, 1); while (cinfo->output_scanline < cinfo->output_height) { pel *p, *end; unsigned char *q; jpeg_read_scanlines(cinfo, buffer, 1); /* Now we have a buffer in RGB format. */ for (p = I->data[cinfo->output_scanline - 1], end = p + I->width, q = (unsigned char*)buffer[0]; p < end; ++p, q += 3) *p = PEL(*q, *(q + 1), *(q + 2)); } jpeg_finish_decompress(cinfo); jpeg_destroy_decompress(cinfo); return 1; } /* jpeg_save_img: * Write an image out into a JPEG file. */ int jpeg_save_img(const img I, FILE *fp) { struct jpeg_compress_struct cinfo; struct my_error_mgr jerr; JSAMPROW *buffer; cinfo.err = jpeg_std_error(&jerr.pub); jerr.pub.error_exit = my_error_exit; if (setjmp(jerr.jb)) { /* Oops, something went wrong. */ I->err = IE_SYSERROR; jpeg_destroy_compress(&cinfo); return 0; } jpeg_create_compress(&cinfo); /* Compressor will write to fp. */ jpeg_stdio_dest(&cinfo, fp); /* Image parameters. */ cinfo.image_width = I->width; cinfo.image_height = I->height; cinfo.input_components = 3; cinfo.in_color_space = JCS_RGB; /* Default parameters. */ jpeg_set_defaults(&cinfo); /* XXX compression quality? */ jpeg_start_compress(&cinfo, TRUE); buffer = cinfo.mem->alloc_sarray((j_common_ptr)&cinfo, JPOOL_IMAGE, I->width * 3, 1); while (cinfo.next_scanline < cinfo.image_height) { pel *p, *end; unsigned char *q; /* Copy image data into correct format. */ for (p = I->data[cinfo.next_scanline], end = p + I->width, q = (unsigned char*)buffer[0]; p < end; ++p) { *q++ = (unsigned char)GETR(*p); *q++ = (unsigned char)GETG(*p); *q++ = (unsigned char)GETB(*p); } /* Write scanline. */ jpeg_write_scanlines(&cinfo, buffer, 1); } jpeg_finish_compress(&cinfo); jpeg_destroy_compress(&cinfo); return 1; } driftnet-1.1.2/src/display/png.c000066400000000000000000000111011221437526200165140ustar00rootroot00000000000000/* * png.c: * PNG image support. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * * Copyright (c) 2003 Drew Roedersheimer, Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #ifdef HAVE_CONFIG_H #include #endif #include #include #include "log.h" #include "driftnet.h" #include "img.h" #include "pngformat.h" void png_catch_error(png_structp png_ptr, png_const_charp error_msg) { log_msg(LOG_WARNING, "libpng, %s (skipping image).", error_msg); if (setjmp(png_jmpbuf(png_ptr))) { log_msg(LOG_ERROR, "libpng, unrecoverable error, terminating."); unexpected_exit(-1); } } int png_load_hdr(img I) { unsigned char sig[PNG_SIG_LEN]; png_structp png_ptr; png_infop info_ptr; rewind(I->fp); if (fread(sig, sizeof(sig[0]), PNG_SIG_LEN, I->fp) != PNG_SIG_LEN) { return(0); } /* Check the PNG signature of the file */ if (png_sig_cmp(sig, (png_size_t)0, PNG_SIG_LEN)) { I->err = IE_HDRFORMAT; return 0; } png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, png_catch_error, NULL); if (png_ptr == NULL) { I->err = IE_HDRFORMAT; return 0; } if (setjmp(png_jmpbuf(png_ptr))) { png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL); I->err = IE_HDRFORMAT; return 0; } info_ptr = png_create_info_struct(png_ptr); if (info_ptr == NULL) { png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL); I->err = IE_HDRFORMAT; return 0; } rewind(I->fp); png_init_io(png_ptr, I->fp); png_read_info(png_ptr, info_ptr); I->width = png_get_image_width(png_ptr, info_ptr); I->height = png_get_image_height(png_ptr, info_ptr); png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL); return(1); } int png_abort_load(img I) { return 1; } int png_load_img(img I) { unsigned char **p, **q; png_structp png_ptr; png_infop info_ptr; png_uint_32 width, height; int i, j, bit_depth, color_type, interlace_type; png_bytepp row_pointers; img_alloc(I); png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, png_catch_error, NULL); if (png_ptr == NULL) { I->err = IE_HDRFORMAT; return 0; } if (setjmp(png_jmpbuf(png_ptr))) { png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL); I->err = IE_HDRFORMAT; return 0; } info_ptr = png_create_info_struct(png_ptr); if (info_ptr == NULL) { png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL); I->err = IE_HDRFORMAT; return 0; } rewind(I->fp); png_init_io(png_ptr, I->fp); png_read_info(png_ptr, info_ptr); /* Get image specific data */ png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, &interlace_type, NULL, NULL); /* Convert greyscale images to 8-bit RGB */ if (color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { if (bit_depth < 8) { png_set_gray_1_2_4_to_8(png_ptr); } png_set_gray_to_rgb(png_ptr); } /* Change paletted images to RGB */ if (color_type == PNG_COLOR_TYPE_PALETTE) png_set_expand(png_ptr); if (bit_depth < 8) png_set_expand(png_ptr); if (bit_depth == 16) png_set_strip_16(png_ptr); /* The gdk img widget appears to expect 8-bit RGB followed by a * filler byte. */ png_set_filler(png_ptr, 0, PNG_FILLER_AFTER); /* Update the info structure after the transforms */ png_read_update_info(png_ptr, info_ptr); /* png_set_rows(png_ptr, info_ptr, row_pointers)*/ /* Allocate space before reading the image */ row_pointers = png_malloc(png_ptr, height * sizeof(png_bytep)); for (i = 0; i < height; i++) { row_pointers[i] = png_malloc(png_ptr, png_get_rowbytes(png_ptr, info_ptr)); } /* Read in the image and copy it to the gdk img structure */ png_read_image(png_ptr, row_pointers); p = (unsigned char **)I->data; q = (unsigned char **)row_pointers; for (i = 0; i < height; i++) { for (j = 0; j < png_get_rowbytes(png_ptr, info_ptr); j++) { p[i][j] = q[i][j]; } } png_read_end(png_ptr, info_ptr); /* Clean up */ png_free(png_ptr, row_pointers); png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL); return 1; } int png_save_img(const img I, FILE *fp) { return 1; } driftnet-1.1.2/src/driftnet.c000066400000000000000000000125241221437526200161140ustar00rootroot00000000000000/* * driftnet.c: * Pick out images from passing network traffic. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * * Copyright (c) 2001 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #ifdef HAVE_CONFIG_H #include #endif #include #include #include #include #include /* On many systems (Darwin...), stdio.h is a prerequisite. */ #include #include #include #include #include "log.h" #include "options.h" #include "tmpdir.h" #include "pid.h" #include "connection.h" #include "packetcapture.h" #ifndef NO_DISPLAY_WINDOW #include "display.h" #endif #include "playaudio.h" #include "driftnet.h" void unexpected_exit(int ret) { /* clean things a litle */ packetcapture_close(); connection_free_slots(); clean_tmpdir(); close_pidfile(); exit(ret); } /* terminate_on_signal: * Terminate on receipt of an appropriate signal. */ sig_atomic_t foad; void terminate_on_signal(int s) { extern pid_t mpeg_mgr_pid; /* in playaudio.c */ /* Pass on the signal to the MPEG player manager so that it can abort, * since it won't die when the pipe into it dies. */ if (mpeg_mgr_pid) kill(mpeg_mgr_pid, s); foad = s; } /* * Set up signal handlers. */ void setup_signals(void) { int *p; /* Signals to ignore. */ int ignore_signals[] = {SIGPIPE, 0}; /* Signals which mean we should quit, killing the display child if * applicable. */ int terminate_signals[] = {SIGTERM, SIGINT, /*SIGSEGV,*/ SIGBUS, SIGCHLD, 0}; struct sigaction sa; sa.sa_flags = SA_RESTART | SA_NOCLDSTOP; for (p = ignore_signals; *p; ++p) { memset(&sa, 0, sizeof(sa)); sa.sa_handler = SIG_IGN; sigaction(*p, &sa, NULL); } for (p = terminate_signals; *p; ++p) { memset(&sa, 0, sizeof(sa)); sa.sa_handler = terminate_on_signal; sigaction(*p, &sa, NULL); } } /* * Thread in which packet capture runs. */ void *capture_thread(void *v) { while (!foad) packetcapture_dispatch(); return NULL; } static void print_exit_reason(void) { if (foad == SIGCHLD) { pid_t pp; int st; while ((pp = waitpid(-1, &st, WNOHANG)) > 0) { if (WIFEXITED(st)) log_msg(LOG_INFO, "child process %d exited with status %d", (int)pp, WEXITSTATUS(st)); else if (WIFSIGNALED(st)) log_msg(LOG_INFO, "child process %d killed by signal %d", (int)pp, WTERMSIG(st)); else log_msg(LOG_INFO, "child process %d died, not sure why", (int)pp); } } else log_msg(LOG_INFO, "caught signal %d", foad); } /* * Entry point. Process command line options, start up pcap and enter capture loop. */ int main(int argc, char *argv[]) { pthread_t packetth; options_t *options; options = parse_options(argc, argv); if (options->verbose) set_loglevel(LOG_INFO); if (options->adjunct) create_pidfile(); /* * In adjunct mode, it's important that the attached program gets * notification of images in a timely manner. Make stdout line-buffered * for this reason. */ if (options->adjunct) setvbuf(stdout, NULL, _IOLBF, 0); /* * If a directory name has not been specified, then we need to create one. * Otherwise, check that it's a directory into which we may write files. */ if (options->tmpdir) { check_dir_is_rw(options->tmpdir); set_tmpdir(options->tmpdir, TMPDIR_USER_OWNED, options->max_tmpfiles, options->adjunct); } else { /* need to make a temporary directory. */ set_tmpdir(make_tmpdir(), TMPDIR_APP_OWNED, options->max_tmpfiles, options->adjunct); } setup_signals(); /* Start up the audio player, if required. */ if (!options->adjunct && (options->extract_type & m_audio)) do_mpeg_player(); #ifndef NO_DISPLAY_WINDOW /* Possibly fork to start the display child process */ if (!options->adjunct && (options->extract_type & m_image)) do_image_display(options->savedimgpfx, options->beep); else log_msg(LOG_INFO, "operating in adjunct mode"); #endif /* !NO_DISPLAY_WINDOW */ init_mediadrv(options->extract_type, !options->adjunct); /* Start up pcap. */ if (options->dumpfile) packetcapture_open_offline(options->dumpfile); else packetcapture_open_live(options->interface, options->filterexpr, options->promisc); connection_alloc_slots(); /* * Actually start the capture stuff up. Unfortunately, on many platforms, * libpcap doesn't have read timeouts, so we start the thing up in a * separate thread. Yay! */ pthread_create(&packetth, NULL, capture_thread, NULL); while (!foad) sleep(1); if (options->verbose) print_exit_reason(); pthread_cancel(packetth); /* make sure thread quits even if it's stuck in pcap_dispatch */ pthread_join(packetth, NULL); /* Clean up. */ /* pcap_freecode(pc, &filter);*/ /* not on some systems... */ packetcapture_close(); /* Easier for memory-leak debugging if we deallocate all this here.... */ connection_free_slots(); clean_tmpdir(); if (options->adjunct) close_pidfile(); return 0; } driftnet-1.1.2/src/driftnet.h000066400000000000000000000013601221437526200161150ustar00rootroot00000000000000/* * driftnet.h: * Pick out images from passing network traffic. * * Copyright (c) 2001 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * * $Id: driftnet.h,v 1.13 2004/04/08 23:06:29 chris Exp $ * */ #ifndef __DRIFTNET_H_ /* include guard */ #define __DRIFTNET_H_ #ifdef HAVE_CONFIG_H #include #endif #define PROGNAME DRIFTNET_PROGNAME void unexpected_exit(int ret); /* alloc_struct S P * Make P point to a new struct S, initialised as if in static storage (like = {0}). */ //#define alloc_struct(S, p) do { struct S as__z = {0}; p = xmalloc(sizeof *p); *p = as__z; } while (0) #define alloc_struct(S, p) p = xmalloc(sizeof *p); memset(p, 0, sizeof *p); #endif /* __DRIFTNET_H_ */ driftnet-1.1.2/src/layer2.c000066400000000000000000000113511221437526200154700ustar00rootroot00000000000000#include "driftnet.h" #include #include #include #include #include #include #include "log.h" #include "layer2.h" /* ETH_P_PAE is named ETHERTYPE_PAE in freebsd, define it */ #ifndef ETH_P_PAE #define ETH_P_PAE 0x888E #endif struct ieee80211_radiotap_header { u_int8_t it_version; /* set to 0 */ u_int8_t it_pad; u_int16_t it_len; /* entire length */ u_int32_t it_present; /* fields present */ }; struct ieee80211_frame { u_int16_t fc; u_int16_t wi_duration; u_int8_t wi_add1[6]; u_int8_t wi_add2[6]; u_int8_t wi_add3[6]; u_int16_t wi_sequenceControl; // u_int8_t wi_add4[6]; //unsigned int qosControl:2; //unsigned int frameBody[23124]; }; struct frame_control { unsigned protocol:2; unsigned type:2; unsigned subtype:4; unsigned to_ds:1; unsigned from_ds:1; unsigned more_frag:1; unsigned retry:1; unsigned pwr_mgt:1; unsigned more_data:1; unsigned wep:1; unsigned order:1; }; /* SNAP LLC header format */ struct snap_header { u_int8_t dsap; u_int8_t ssap; u_int8_t ctl; u_int8_t org1; u_int8_t org2; u_int8_t org3; u_int16_t ether_type; /* ethernet type */ }; /* * 802.11 is a little different from most other L2 protocols: * - Not all frames are data frames (control, data, management) (data frame == L3 or higher included) * - Not all data frames have data (QoS frames are "data" frames, but have no L3 header) * - L2 header is 802.11 + an 802.2/802.2SNAP header */ static int parse_ieee80211(const u_char *pkt, uint32_t caplen, unsigned short *llnextproto, int *offsetnext) { struct ieee80211_frame *_80211_header; struct frame_control *control; _80211_header = (struct ieee80211_frame *) pkt; control = (struct frame_control *) &_80211_header->fc; /* check protocol version */ if (control->protocol != 0) { return -1; } /* check for data frame */ if (control->type != 2) { return -1; } /* data and QoS frames */ if (control->subtype != 0 && control->subtype != 8) { return -1; } /* check encrypted data */ if (control->wep == 1) { return -1; } size_t header_len = sizeof(struct ieee80211_frame); /* QoS frame, add control bits */ if (control->subtype == 8) header_len += 2; /* * To From a1 a2 a3 a4 * -------------------------------- * 0 0 dst src bssid x * 0 1 dst bssid src x * 1 0 bssid src dst x * 1 1 rcv trx dst src */ if (control->to_ds == 1 && control->from_ds == 1) { header_len += 6; } /* get the snap header */ struct snap_header *llc_header = (struct snap_header *) (pkt + header_len); /* verify the header is 802.2SNAP (8 bytes) not 802.2 (3 bytes) */ if (llc_header->dsap != 0xAA || llc_header->ssap != 0xAA) { return -1; } /* get the offset of the next header and protocol */ *offsetnext = header_len + sizeof (struct snap_header); *llnextproto = ntohs(llc_header->ether_type); return 0; } int handle_link_layer(datalink_info_t *info, const u_char *pkt, uint32_t caplen, uint8_t *nextproto, int *offsetnext) { unsigned short llnextproto = 0; struct ieee80211_radiotap_header *radiotap_header; const u_char *next_header; struct ethhdr *eptr; size_t remaining_len; switch (info->type) { /* Ethernet packet */ case DLT_EN10MB: eptr = (struct ethhdr *) pkt; /* get the offset of the next header and the protocol */ *offsetnext = sizeof(struct ethhdr); llnextproto = ntohs(eptr->h_proto); break; /* radiotap packet */ case DLT_IEEE802_11_RADIO: /* * A radiotap packet consist of a radiotap information header followed by * an 802.11 packet header. */ radiotap_header = (struct ieee80211_radiotap_header *) pkt; /* calculate the offset of next 802.11 header */ next_header = pkt + radiotap_header->it_len; remaining_len = caplen - radiotap_header->it_len; if (parse_ieee80211(next_header, remaining_len, &llnextproto, offsetnext)) { return -1; } *offsetnext += radiotap_header->it_len; break; case DLT_IEEE802_11: if (parse_ieee80211(pkt, caplen, &llnextproto, offsetnext)) { return -1; } break; default: /* unsupported packet */ log_msg(LOG_WARNING, "link-level (%s) header is not supported", info->name); return -1; } /* check next header protocol */ switch (llnextproto) { case ETH_P_IP: /* Next header is IP */ *nextproto = IPPROTO_IP; break; case ETH_P_IPV6: /* Next header is IPv6 */ *nextproto = IPPROTO_IPV6; break; case ETH_P_ARP: case ETH_P_PAE: return -1; default: log_msg(LOG_WARNING, "link-level next protocol (%hd) is not supported", llnextproto); return -1; } return 0; } driftnet-1.1.2/src/layer2.h000066400000000000000000000016401221437526200154750ustar00rootroot00000000000000/* * layer2.h: * * Layer2 handling. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * */ #ifndef __LAYER2_H__ #define __LAYER2_H__ #ifdef HAVE_CONFIG_H #include #endif #include "compat.h" #include "packetcapture.h" /* for datalink_info_t */ /** * handle_link_layer: * * Handles the data link layer (layer 2) returning information of the next layer 3 protocol * and the offset in the packet. * * @param[in] info data link information. * @param[in] pkt the captured packet. * @param[in] caplen the length of the captured packet. * @param[out] nextproto the protocol of next header (as IP protocol). * @param[out] offsetnext the offset of next header in packet. * * @return 0 if OK, -1 if error / unsupported proto */ int handle_link_layer(datalink_info_t *info, const u_char *pkt, uint32_t caplen, uint8_t *nextproto, int *offsetnext); #endif /* __LAYER2_H__ */ driftnet-1.1.2/src/layer3.c000066400000000000000000000054151221437526200154750ustar00rootroot00000000000000#include "driftnet.h" #include #include #include #include #include "log.h" #include "layer3.h" int layer3_find_tcp(const u_char *pkt, uint8_t nextproto, int * offset, struct sockaddr * src, struct sockaddr * dst, struct tcphdr * tcp) { u_int16_t *sport = NULL; u_int16_t *dport = NULL; while (1) { switch (nextproto) { case IPPROTO_TCP: /* Found the TCP header , we're almost done */ /* Copy out the TCP header */ memcpy(tcp, pkt + *offset, sizeof(struct tcphdr)); /* Update the sockaddr with the TCP ports */ assert(sport && dport); *sport = tcp->th_sport; *dport = tcp->th_dport; /* update offset */ *offset += tcp->th_off << 2; /* Success */ return 0; case IPPROTO_IPIP: /* IPIP tunnel */ case IPPROTO_IP: /* IP packet */ { struct ip *ip; struct sockaddr_in *ps, *pd; ip = (struct ip *)(pkt + *offset); /* update nextproto and offset */ nextproto = ip->ip_p; *offset += ip->ip_hl << 2; /* save the addresses in s and d */ bzero(src, sizeof(struct sockaddr_storage)); bzero(dst, sizeof(struct sockaddr_storage)); ps = (struct sockaddr_in *)src; pd = (struct sockaddr_in *)dst; ps->sin_family = AF_INET; memcpy(&ps->sin_addr.s_addr, &ip->ip_src, sizeof(struct in_addr)); sport = &ps->sin_port; pd->sin_family = AF_INET; memcpy(&pd->sin_addr.s_addr, &ip->ip_dst, sizeof(struct in_addr)); dport = &pd->sin_port; } break; case IPPROTO_IPV6: /* IPv6 packet */ { struct ip6_hdr *ip6; struct sockaddr_in6 *ps, *pd; ip6 = (struct ip6_hdr *)(pkt + *offset); /* update nextproto and offset */ nextproto = ip6->ip6_nxt; *offset += sizeof(struct ip6_hdr); /* save the addresses in s and d */ bzero(src, sizeof(struct sockaddr_storage)); bzero(dst, sizeof(struct sockaddr_storage)); ps = (struct sockaddr_in6 *)src; pd = (struct sockaddr_in6 *)dst; ps->sin6_family = AF_INET6; memcpy(&ps->sin6_addr, &ip6->ip6_src, sizeof(struct in6_addr)); sport = &ps->sin6_port; pd->sin6_family = AF_INET6; memcpy(&pd->sin6_addr, &ip6->ip6_dst, sizeof(struct in6_addr)); dport = &pd->sin6_port; } break; case IPPROTO_DSTOPTS: /* destination option */ case IPPROTO_ROUTING: /* routing header */ { struct ip6_ext * ip6ext; ip6ext = (struct ip6_ext *)(pkt + *offset); /* update nextproto and offset */ nextproto = ip6ext->ip6e_nxt; *offset += ip6ext->ip6e_len << 3; } break; /* ignored */ case IPPROTO_ICMP: case IPPROTO_ICMPV6: case IPPROTO_IGMP: case IPPROTO_UDP: return -1; default: /* unsupported proto */ goto end; } } end: log_msg(LOG_WARNING, "unsupported protocol dataframe (%d)", nextproto); return -1; } driftnet-1.1.2/src/layer3.h000066400000000000000000000015021221437526200154730ustar00rootroot00000000000000/* * layer3.h: * * Layer3 handling. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * */ #ifndef __LAYER3_H__ #define __LAYER3_H__ #ifdef HAVE_CONFIG_H #include #endif #include "compat.h" #include /** * layer3_find_tcp: * * Handles the network layer (layer 3) trying to find tcp packets. * * @param[in] pkt the packet. * @param[in] nextproto layer 3 protocol. * @param[in/out] offset (in) offset of l3 proto / (out) offset of TCP payload. * @param[out] src,dst addresses and ports of the connexion. * @param[out] tcp the tcp header. * * @return 0 OK, -1 if unsupported proto or no TCP. */ int layer3_find_tcp(const u_char *pkt, uint8_t nextproto, int *offset, struct sockaddr *src, struct sockaddr *dst, struct tcphdr *tcp); #endif /* __LAYER3_H__ */ driftnet-1.1.2/src/log.c000066400000000000000000000041221221437526200150510ustar00rootroot00000000000000/* * log.c: * Logging functions. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * * Copyright (c) 2002 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #include #include #include #include #include "util.h" #include "driftnet.h" #include "log.h" static loglevel_t loglevel = LOG_WARNING; static char* get_levelstring(loglevel_t level); char* get_timestring(void); loglevel_t get_loglevel(void) { return loglevel; } void set_loglevel(loglevel_t level) { loglevel = level; } void log_msg(loglevel_t level, const char *fmt, ...) { int n; int size = 100; /* guess we need no more than 100 bytes */ char *msg; va_list ap; char *levelstring; char *timestring; if (get_loglevel() < level) return; msg = xmalloc(size); while (1) { va_start(ap, fmt); n = vsnprintf(msg, size, fmt, ap); va_end(ap); /* have it */ if (n > -1 && n < size) break; /* try again with more space */ if (n > -1) /* glibc 2.1 */ size = n+1; /* precisely what is needed */ else /* glibc 2.0 */ size *= 2; /* twice the old size */ msg = realloc (msg, size); } levelstring = get_levelstring(level); timestring = get_timestring(); fprintf(stderr, "%s [%s] %s: %s\n", timestring, PROGNAME, levelstring, msg); xfree(msg); } char* get_timestring(void) { time_t timee; struct tm *timeinfo; static char time_s[80]; time ( &timee ); timeinfo = localtime ( &timee ); strftime (time_s, 80, "%a %b %d %H:%M:%S %Y", timeinfo); return time_s; } char* get_levelstring(loglevel_t level) { switch (level) { case LOG_INFO: return "info"; case LOG_WARNING: return "warning"; case LOG_ERROR: return "error"; default: fprintf(stderr, PROGNAME ": get_level_string(): internal error"); unexpected_exit(-1); } return NULL; } driftnet-1.1.2/src/log.h000066400000000000000000000006441221437526200150630ustar00rootroot00000000000000/* * log.h: * Logging functions. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * */ #ifndef __LOG_H__ #define __LOG_H__ #ifdef HAVE_CONFIG_H #include #endif typedef enum {LOG_ERROR = 0, LOG_WARNING, LOG_INFO} loglevel_t; 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Ogg Vorbis is a bit harder because we'd need * to find the stream-start packet as well-- in practice, we probably would be * able to, but it's a bit of a hassle. * * Copyright (c) 2002 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #include #include "mpeghdr.h" #include "audio.h" /* The minimum chunk of MPEG data, in frames, which we accept. MPEG layer 2/3 * frames have 1152 samples, so there are something like 40 frames/s at * 44.1kHz. If there are several MPEG streams available, driftnet may chop * between them in chunks of this size. */ #define MIN_MPEG_EXTENT 100 /* find_mpeg_stream: * Try to find some MPEG data in a stream. The game here is that we look for * an MPEG audio header and see whether it's followed by a bunch more MPEG * audio headers. If there's as much as MIN_MPEG_EXTEND data, then we give * it back to the application and move our pointer on. */ unsigned char *find_mpeg_stream(const unsigned char *data, const size_t len, unsigned char **mpegdata, size_t *mpeglen) { unsigned char *stream_start, *p; struct mpeg_audio_hdr H; *mpegdata = NULL; if (len < 4) return (unsigned char*)data; /*printf("find_mpeg_stream\n"); */ p = (unsigned char*)data; while (p < data + len - 4) { int nframes; unsigned char *q; /* Look for something which might be a frame header. */ stream_start = memchr(p, 0xff, len - 4 - (p - data)); if (!stream_start) return (unsigned char*)(data + len - 4); if ((stream_start[1] & 0xe0) != 0xe0) { /*printf(" not followed by e0\n");*/ p = stream_start + 1; continue; } /* OK, found something which might be a header.... */ if (!mpeg_hdr_parse(stream_start, &H)) { p = stream_start + 1; continue; } /* See how many frames we get. */ nframes = 0; q = stream_start; do { int delta; ++nframes; delta = mpeg_hdr_nextframe_offset(&H); if (delta == 0) return q + 1; q += delta; } while (nframes < MIN_MPEG_EXTENT && q < data + len - 4 && mpeg_hdr_parse(q, &H)); if (nframes >= MIN_MPEG_EXTENT) { /* got some data. */ /* printf("stream_start = %p, q = %p, len = %d\n", stream_start, q, q - stream_start);*/ *mpegdata = stream_start; *mpeglen = q - stream_start; return q; } else return stream_start; } return p; } driftnet-1.1.2/src/media/audio.h000066400000000000000000000007151221437526200164610ustar00rootroot00000000000000/* * audio.h: * Attempt to extract audio frames embedded in buffers. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * * Copyright (c) 2002 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #ifndef __AUDIO_H__ #define __AUDIO_H__ unsigned char *find_mpeg_stream(const unsigned char *data, const size_t len, unsigned char **mpegdata, size_t *mpeglen); #endif /* __AUDIO_H__ */ driftnet-1.1.2/src/media/http.c000066400000000000000000000076051221437526200163370ustar00rootroot00000000000000/* * http.c: * Look for HTTP requests in buffers. * * We look for GET requests only, and only if the response is of type * text/html. * * Copyright (c) 2003 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #ifdef HAVE_CONFIG_H #include #endif #include "compat.h" #include #include #include /* On many systems (Darwin...), stdio.h is a prerequisite. */ #include #include "util.h" /* find_http_req DATA LEN FOUND FOUNDLEN * Look for an HTTP request and response in buffer DATA of length LEN. The * return value is a pointer into DATA suitable for a subsequent call to this * function; *FOUND is either NULL, or a pointer to the start of an HTTP * request; in the latter case, *FOUNDLEN is the length of the match * containing enough information to obtain the URL. */ unsigned char *find_http_req(const unsigned char *data, const size_t len, unsigned char **http, size_t *httplen) { unsigned char *req, *le, *blankline, *hosthdr; #define remaining(x) (len - ((x) - data)) #define MAX_REQ 16384 #define HTTPGET_LEN 4 #define HTTPPOST_LEN 5 /* HTTP requests look like: * * GET {path} HTTP/1.(0|1)\r\n * header: value\r\n * ... * \r\n * * We may care about the Host: header in the request. */ if (len < 40) return (unsigned char*)data; if (!(req = memstr(data, len, (unsigned char*)"GET ", HTTPGET_LEN)) && !(req = memstr(data, len, (unsigned char*)"POST ", HTTPPOST_LEN)) ) return (unsigned char*)(data + len - HTTPGET_LEN); /* Find the end of the request line. */ if (!(le = memstr(req + HTTPGET_LEN, remaining(req + HTTPGET_LEN), (unsigned char*)"\r\n", 2))) { if (remaining(req + HTTPGET_LEN) > MAX_REQ) return (unsigned char*)(req + HTTPGET_LEN); else return (unsigned char*)req; } /* Not enough space for a path. */ if (le < req + 5) return le + 2; /* Not an HTTP request, just a line starting GET.... */ if (memcmp(le - 9, " HTTP/1.", 8) || !strchr("01", (int)*(le - 1))) return le + 2; /* Find the end of the request headers. */ if (!(blankline = memstr(le + 2, remaining(le + 2), (unsigned char*)"\r\n\r\n", 4))) { if (remaining(le + 2) > MAX_REQ) return (unsigned char*)(data + len - 4); else return req; } if ((memcmp(req + HTTPGET_LEN, "http://", 7) == 0) || (memcmp(req + HTTPPOST_LEN, "http://", 7) == 0)) /* Probably a cache request; in any case, don't need to look for a Host:. */ goto found; /* Is there a Host: header? */ if (!(hosthdr = memstr(le, blankline - le + 2, (unsigned char*)"\r\nHost: ", 8))) { return blankline + HTTPGET_LEN; } found: *http = req; *httplen = blankline - req; return blankline + 4; } void dispatch_http_req(const char *mname, const unsigned char *data, const size_t len) { char *url; const char *path, *host; int pathlen, hostlen; const unsigned char *p; if (!(p = memstr(data, len, (unsigned char*)"\r\n", 2))) return; path = (const char*)(data + 4); pathlen = (p - 9) - (unsigned char*)path; if (memcmp(path, "http://", 7) == 0) { url = malloc(pathlen + 1); sprintf(url, "%.*s", pathlen, path); } else { if (!(p = memstr(p, len - (p - data), (unsigned char*)"\r\nHost: ", 8))) return; host = (const char*)(p + 8); if (!(p = memstr(p + 8, len - (p + 8 - data), (unsigned char*)"\r\n", 2))) return; hostlen = p - (const unsigned char*)host; if (hostlen == 0) return; url = malloc(hostlen + pathlen + 9); sprintf(url, "http://%.*s%.*s", hostlen, host, pathlen, path); } fprintf(stderr, "\n\n %s\n\n", url); free(url); } driftnet-1.1.2/src/media/http.h000066400000000000000000000010771221437526200163410ustar00rootroot00000000000000 /* * http.h: * Look for HTTP requests in buffers. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * * Copyright (c) 2002 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #ifndef __HTTP_H__ #define __HTTP_H__ #ifdef HAVE_CONFIG_H #include #endif unsigned char *find_http_req(const unsigned char *data, const size_t len, unsigned char **http, size_t *httplen); void dispatch_http_req(const char *mname, const unsigned char *data, const size_t len); #endif /* __HTTP_H__ */ driftnet-1.1.2/src/media/image.c000066400000000000000000000222521221437526200164350ustar00rootroot00000000000000/* * image.c: * Attempt to find GIF/JPEG/PNG data embedded in buffers. * * Copyright (c) 2001 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #include #include /* On many systems (Darwin...), stdio.h is a prerequisite. */ #include #include /* ntohl */ #include "util.h" #include "pngformat.h" /* If we run out of space, put us back to the last candidate GIF header. */ /*#define spaceleft do { if (block > data + len) { printf("ran out of space\n"); return gifhdr; } } while (0)*/ #define spaceleft if (block >= data + len) return gifhdr /* > ?? */ unsigned char *find_gif_image(const unsigned char *data, const size_t len, unsigned char **gifdata, size_t *giflen) { unsigned char *gifhdr, *block; /*int gotimgblock = 0;*/ int ncolours; *gifdata = NULL; if (len < 6) return (unsigned char*)data; gifhdr = memstr(data, len, (unsigned char*)"GIF89a", 6); if (!gifhdr) gifhdr = memstr(data, len, (unsigned char*)"GIF87a", 6); if (!gifhdr) return (unsigned char*)(data + len - 6); if (data + len - gifhdr < 14) return gifhdr; /* no space for header */ ncolours = (1 << ((gifhdr[10] & 0x7) + 1)); /* printf("gif header %d colours\n", ncolours); */ block = gifhdr + 13; spaceleft; if (gifhdr[10] & 0x80) block += 3 * ncolours; /* global colour table */ spaceleft; do { /* printf("gifhdr = %p block = %p off = %u %02x\n", gifhdr, block, block - gifhdr, (unsigned int)*block); */ switch (*block) { case 0x2c: /* image block */ /* printf("image data\n"); */ if (block + 9 > data + len) return gifhdr; if (block[9] & 0x80) { /* local colour table */ block += 3 * ((1 << ((gifhdr[9] & 0x7) + 1))); spaceleft; } block += 10; ++block; /* lzw code size */ do { spaceleft; block += *block + 1; spaceleft; } while (*block); ++block; spaceleft; /*gotimgblock = 1;*/ break; case 0x21: /* extension */ ++block; spaceleft; if (*block == 0xf9) { /* graphic control */ /* printf("graphic control\n"); */ ++block; spaceleft; block += *block + 2; spaceleft; break; } else if (*block == 0xfe) { /* comment */ /* printf("comment\n"); */ ++block; do { spaceleft; block += *block + 1; spaceleft; } while (*block); ++block; spaceleft; } else if (*block == 0x01) { /* text label */ /* printf("text label\n"); */ ++block; spaceleft; if (*block != 12) return gifhdr + 6; block += 13; do { spaceleft; block += *block + 1; spaceleft; } while (*block); ++block; spaceleft; } else if (*block == 0xff) { /* printf("application extension\n"); */ ++block; spaceleft; if (*block != 11) return gifhdr + 6; block += 12; do { spaceleft; /* printf("app extension data %d bytes\n", (int)*block); */ block += *block + 1; spaceleft; } while (*block); ++block; spaceleft; } else { /* printf("unknown extension block\n"); */ return gifhdr + 6; } break; case 0x3b: /* end of file block: we win. */ /* printf("gif data from %p to %p\n", gifhdr, block); */ *gifdata = gifhdr; *giflen = block - gifhdr + 1; return block + 1; break; default: /* printf("unknown block %02x\n", *block); */ return gifhdr + 6; } } while (1); } /* If we run out of space, put us back to the last candidate JPEG header. */ #define jpegcount(c) ((*(c) << 8) | *((c) + 1)) unsigned char *jpeg_next_marker(unsigned char *d, size_t len) { unsigned char *end = d + len; while (d < end && *d != 0xff) ++d; if (d == end) return NULL; while (d < end && *d == 0xff) ++d; /* skip 0xff padding */ if (d == end) return NULL; return d; } unsigned char *jpeg_skip_block(unsigned char *d, size_t len) { int l; if (len < 2) return NULL; l = jpegcount(d); if (l > len) return NULL; return d + l; } unsigned char *find_jpeg_image(const unsigned char *data, const size_t len, unsigned char **jpegdata, size_t *jpeglen) { unsigned char *jpeghdr, *block; *jpegdata = NULL; jpeghdr = memstr(data, len, (unsigned char*)"\xff\xd8", 2); /* JPEG SOI marker */ if (!jpeghdr) return (unsigned char*)(data + len - 1); /* printf("SOI marker at %p\n", jpeghdr); */ if (jpeghdr + 2 > data + len) return jpeghdr; block = jpeg_next_marker(jpeghdr + 2, len - 2 - (jpeghdr - data)); /* printf("next block at %p\n", block); */ if (!block || (block - data) >= len) return jpeghdr; /* now we need to find the onward count from this place */ while ((block = jpeg_skip_block(block + 1, len - (block + 1 - data)))) { /* printf("data = %p block = %p\n", data, block); */ block = jpeg_next_marker(block, len - (block - data)); if (!block || (block - data) >= len) return jpeghdr; /* printf("got block of type %02x\n", *block); */ if (*block == 0xda) { /* start of scan; dunno how to parse this but just look for end of * image marker. XXX this is broken, fix it! */ block = memstr(block, len - (block - data), (unsigned char*)"\xff\xd9", 2); if (block) { *jpegdata = jpeghdr; *jpeglen = block + 2 - jpeghdr; return block + 2; } else break; } } /* printf("nope, no complete JPEG here\n"); */ return jpeghdr; } /* find_png_eoi BUFFER LEN * Returns the first position in BUFFER of LEN bytes after the end of the image * or NULL if end of image not found. */ unsigned char *find_png_eoi(unsigned char *buffer, const size_t len) { unsigned char *end_data, *data, chunk_code[PNG_CODE_LEN + 1]; struct png_chunk chunk; u_int32_t datalen; /* Move past the PNG header */ data = (buffer + PNG_SIG_LEN); end_data = (buffer + len - (sizeof(struct png_chunk) + PNG_CRC_LEN)); while (data <= end_data) { memcpy(&chunk, data, sizeof chunk); /* chunk = (struct png_chunk *)data; */ /* can't do that. */ memset(chunk_code, '\0', PNG_CODE_LEN + 1); memcpy(chunk_code, chunk.code, PNG_CODE_LEN); datalen = ntohl(chunk.datalen); if (!strncasecmp((char*)chunk_code, "iend", PNG_CODE_LEN)) return (unsigned char *)(data + sizeof(struct png_chunk) + PNG_CRC_LEN); /* Would this push us off the end of the buffer? */ if (datalen > (len - (data - buffer))) return NULL; data += (sizeof(struct png_chunk) + datalen + PNG_CRC_LEN); } return NULL; } /* find_png_image DATA LEN PNGDATA PNGLEN * Look for PNG images in LEN bytes buffer DATA. */ unsigned char *find_png_image(const unsigned char *data, const size_t len, unsigned char **pngdata, size_t *pnglen) { unsigned char *pnghdr, *data_end, *png_eoi; *pngdata = NULL; if (len < PNG_SIG_LEN) return (unsigned char*)data; pnghdr = memstr(data, len, (unsigned char*)"\x89\x50\x4e\x47\x0d\x0a\x1a\x0a", PNG_SIG_LEN); if (!pnghdr) return (unsigned char*)(data + len - PNG_SIG_LEN); data_end = (unsigned char *)(data + len); if ((png_eoi = find_png_eoi(pnghdr, (data_end - pnghdr))) == NULL) return pnghdr; *pngdata = pnghdr; *pnglen = (png_eoi - pnghdr); return png_eoi; } #if 0 #include #include int main(int argc, char **argv) { unsigned char buf[262144]; char **a; for (a = argv + 1; *a; ++a) { unsigned char *p, *img; size_t len; int fd = open(*a, O_RDONLY); read(fd, buf + rand() % 256, 261000); /* printf("jpeg file %s\n", *a); */ p = buf; do { /* printf("--> now p = %p\n", p); */ p = find_jpeg_image(p, 262144 - (p - buf), &img, &len); if (img) /* printf(" found image %p len %u\n", img, len); */ } while (p); } } #endif driftnet-1.1.2/src/media/image.h000066400000000000000000000013121221437526200164340ustar00rootroot00000000000000/* * image.h: * Attempt to find GIF/JPEG/PNG data embedded in buffers. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * * Copyright (c) 2001 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #ifndef __IMAGE_H__ #define __IMAGE_H__ unsigned char *find_gif_image(const unsigned char *data, const size_t len, unsigned char **gifdata, size_t *giflen); unsigned char *find_jpeg_image(const unsigned char *data, const size_t len, unsigned char **jpegdata, size_t *jpeglen); unsigned char *find_png_image(const unsigned char *data, const size_t len, unsigned char **pngdata, size_t *pnglen); #endif /* __IMAGE_H__ */ driftnet-1.1.2/src/media/media.c000066400000000000000000000063651221437526200164410ustar00rootroot00000000000000/* * media.c: * Extract various media types from files. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * * Copyright (c) 2002 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #include #include /* On many systems (Darwin...), stdio.h is a prerequisite. */ #include #include #include #include "util.h" #include "tmpdir.h" #ifndef NO_DISPLAY_WINDOW #include "display.h" #endif #include "image.h" #include "audio.h" #include "http.h" #include "playaudio.h" #include "media.h" static mediatype_t extract_type; static int play_media; /* * dispatch_image: * Throw some image data at the display process. */ void dispatch_image(const char *mname, const unsigned char *data, const size_t len) { const char *name; name = tmpfile_write(mname, data, len); if (name == NULL) return; if (!play_media) printf("%s/%s\n", get_tmpdir(), name); #ifndef NO_DISPLAY_WINDOW else display_send_img(name, TMPNAMELEN); #endif /* !NO_DISPLAY_WINDOW */ } /* * dispatch_mpeg_audio: * Throw some MPEG audio into the player process or temporary directory as * appropriate. */ void dispatch_mpeg_audio(const char *mname, const unsigned char *data, const size_t len) { mpeg_submit_chunk(data, len); } /* Media types we handle. */ static struct mediadrv { char *name; enum mediatype type; unsigned char *(*find_data)(const unsigned char *data, const size_t len, unsigned char **found, size_t *foundlen); void (*dispatch_data)(const char *mname, const unsigned char *data, const size_t len); } driver[NMEDIATYPES] = { { "gif", m_image, find_gif_image, dispatch_image }, { "jpeg", m_image, find_jpeg_image, dispatch_image }, { "png", m_image, find_png_image, dispatch_image }, { "mpeg", m_audio, find_mpeg_stream, dispatch_mpeg_audio }, { "HTTP", m_text, find_http_req, dispatch_http_req } }; void init_mediadrv(mediatype_t media_type, int play) { extract_type = media_type; play_media = play; } /* connection_extract_media CONNECTION TYPE * Attempt to extract media data of the given TYPE from CONNECTION. */ void extract_media(connection c) { struct datablock *b; /* Walk through the list of blocks and try to extract media data from * those which have changed. */ for (b = c->blocks; b; b = b->next) { if (b->len > 0 && b->dirty) { int i; for (i = 0; i < NMEDIATYPES; ++i) if (driver[i].type & extract_type) { unsigned char *ptr, *oldptr, *media; size_t mlen; ptr = c->data + b->off + b->moff[i]; oldptr = NULL; while (ptr != oldptr && ptr < c->data + b->off + b->len) { oldptr = ptr; ptr = driver[i].find_data(ptr, (b->off + b->len) - (ptr - c->data), &media, &mlen); if (media && !tmpfiles_limit_reached()) driver[i].dispatch_data(driver[i].name, media, mlen); } b->moff[i] = ptr - c->data - b->off; } b->dirty = 0; } } } driftnet-1.1.2/src/media/media.h000066400000000000000000000013441221437526200164360ustar00rootroot00000000000000/* * media.h: * Media data handling. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * * Copyright (c) 2002 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #ifndef __MEDIA_H__ #define __MEDIA_H__ #ifdef HAVE_CONFIG_H #include #endif /* define before connection.h include: circular dependency */ #define NMEDIATYPES 5 struct connection; #include "connection.h" /* * enum mediatype: * Bit field to characterise types of media which we can extract. */ typedef enum mediatype { m_image = 1, m_audio = 2, m_text = 4 } mediatype_t; void init_mediadrv(mediatype_t media_type, int play); void extract_media(connection c); #endif /* __MEDIA_H__ */ driftnet-1.1.2/src/media/mpeghdr.c000066400000000000000000000114471221437526200170050ustar00rootroot00000000000000/* * mpeghdr.c: * Parse MPEG audio headers. * * Copyright (c) 2002 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #include #include "mpeghdr.h" /* bits: * Get bits a through b < a of val. */ //#define bits(v, a, b) (((v) & ((4 << ((a) - (b))) - 1)) >> (b)) #define bits(v, a, b) (((v) & (((2 << ((a) - (b))) - 1) << (b))) >> (b)) /* bitrate_tbl: * Table of bit rates. Column index: 0 = v1 l1; 1 = v1 l2; 2 = v1 l3; * 3 = v2 l1; 4 = v2 l2, l3. */ static int bitrate_tbl[16][5] = { { 0, 0, 0, 0, 0}, /* free */ { 32, 32, 32, 32, 8}, { 64, 48, 40, 48, 16}, { 96, 56, 48, 56, 24}, {128, 64, 56, 64, 32}, {160, 80, 64, 80, 40}, {192, 96, 80, 96, 48}, {224, 112, 96, 112, 56}, {256, 128, 112, 128, 64}, {288, 160, 128, 144, 80}, {320, 192, 160, 160, 96}, {352, 224, 192, 176, 112}, {384, 256, 224, 192, 128}, {416, 320, 256, 224, 144}, {448, 384, 320, 256, 160}, { -1, -1, -1, -1, -1} /* bad */ }; /* samplerate_tbl: * Table of sample rates. Column index: v1 = 0, v2 = 1, v2.5 = 2. */ static int samplerate_tbl[4][3] = { {44100, 22050, 11025}, {48000, 24000, 12000}, {32000, 16000, 8000}, { -1, -1, -1} /* reserved */ }; /* mpeg_hdr_parse: * Parse an MPEG header into a struct mpeg_audio_hdr. */ int mpeg_hdr_parse(const uint8_t *data, struct mpeg_audio_hdr *h) { struct mpeg_audio_hdr hz = {0}; uint32_t hh; int i; *h = hz; if (data[0] != 0xff || (data[1] & 0xe0) != 0xe0) return 0; hh = (data[1] << 16) | (data[2] << 8) | data[3]; /*fprintf(stderr, "%08x\n", hh);*/ /* Version. */ switch (bits(hh, 20, 19)) { case 0: h->version = m_vers_2_5; break; case 2: h->version = m_vers_2; break; case 3: h->version = m_vers_1; break; default: return 0; } /* Layer. */ switch (bits(hh, 18, 17)) { case 1: h->layer = m_layer_3; break; case 2: h->layer = m_layer_2; break; case 3: h->layer = m_layer_1; break; default: return 0; } /* Possible CRC. */ h->has_crc = bits(hh, 16, 16); if (h->has_crc) h->crc = (data[5] << 8) | (data[6]); /* Bit rate. */ i = (h->version == m_vers_1) ? 0 : 3; i += h->layer - 1; if (i == 5) i = 4; h->bitrate = bitrate_tbl[bits(hh, 15, 12)][i]; if (h->bitrate == -1) return 0; /* Sample rate. */ i = h->version - 1; h->samplerate = samplerate_tbl[bits(hh, 11, 10)][i]; if (h->samplerate == - 1) return 0; /* Is frame padded? */ h->padded = bits(hh, 9, 9); /* Channel mode. */ h->channels = bits(hh, 7, 6); /* Mode extension. */ h->mode_extn = bits(hh, 5, 4); h->copyr = bits(hh, 3, 3); h->original = bits(hh, 2, 2); h->emph = bits(hh, 1, 0); return 1; } /* mpeg_hdr_nextframe_offset: * Return the offset of the next MPEG header frame. * XXX this doesn't work with (at least) L3 mono frames-- need to fix it. */ int mpeg_hdr_nextframe_offset(const struct mpeg_audio_hdr *h) { int off = 0; /* if (h->has_crc) off += 2; */ if (h->layer == m_layer_1) off += ((12 * h->bitrate * 1000) / h->samplerate + h->padded) * 4; else off += (144 * h->bitrate * 1000) / h->samplerate + h->padded; return off; } /* mpeg_hdr_print: * Print out useful information about an MPEG audio header. */ static char *vers_tbl[] = {"unknown", "1", "2", "2.5"}; static char *channel_tbl[] = {"stereo", "joint stereo", "dual stereo", "mono"}; void mpeg_hdr_print(FILE *fp, const struct mpeg_audio_hdr *h) { fprintf(fp, "version %s layer %d\n", vers_tbl[h->version], h->layer); if (h->has_crc) fprintf(fp, " has CRC %04x\n", h->crc); fprintf(fp, "bit rate %d kbps\nsample rate %dHz\n", h->bitrate, h->samplerate); fprintf(fp, "%s padded\n", h->padded ? "is" : "is not"); fprintf(fp, "%s\n", channel_tbl[h->channels]); if (h->channels == m_chan_joint) fprintf(fp, "mode extension %d\n", h->mode_extn); fprintf(fp, "%s copyright\n%s original\n", h->copyr ? "is" : "is not", h->original ? "is" : "is not"); if (h->emph) fprintf(fp, "emphasis %d\n", h->emph); } #if 0 int main(int argc, char *argv[]) { char buf[8192], *p; struct mpeg_audio_hdr h; read(0, buf, sizeof buf); for (p = buf; p < buf + sizeof buf; ) { if (!mpeg_hdr_parse(p, &h)) { fprintf(stderr, "no MPEG audio header\n"); return -1; } mpeg_hdr_print(stdout, &h); printf("offset to next frame = %d\n", mpeg_hdr_nextframe_offset(&h)); p += mpeg_hdr_nextframe_offset(&h); } } #endif driftnet-1.1.2/src/media/mpeghdr.h000066400000000000000000000021711221437526200170040ustar00rootroot00000000000000/* * mpeghdr.h: * MPEG audio header stuff. * * Copyright (c) 2002 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * * $Id: mpeghdr.h,v 1.4 2003/05/20 16:49:08 chris Exp $ * */ #ifndef __MPEGHDR_H_ /* include guard */ #define __MPEGHDR_H_ #ifdef HAVE_CONFIG_H #include #endif #include "compat.h" #include /* struct mpeg_audio_hdr: * Structure representing the four-byte header of an MPEG audio frame. */ struct mpeg_audio_hdr { enum { m_vers_unknown = 0, m_vers_1, m_vers_2, m_vers_2_5 } version; enum { m_layer_unknown = 0, m_layer_1, m_layer_2, m_layer_3 } layer; int has_crc; uint16_t crc; int bitrate; int samplerate; int padded; int priv; enum { m_chan_stereo = 0, m_chan_joint, m_chan_dual, m_chan_mono} channels; uint8_t mode_extn; int copyr, original; uint8_t emph; }; /* mpeghdr.c */ int mpeg_hdr_parse(const uint8_t *data, struct mpeg_audio_hdr *h); int mpeg_hdr_nextframe_offset(const struct mpeg_audio_hdr *h); void mpeg_hdr_print(FILE *fp, const struct mpeg_audio_hdr *h); #endif /* __MPEGHDR_H_ */ driftnet-1.1.2/src/media/playaudio.c000066400000000000000000000150061221437526200173410ustar00rootroot00000000000000/* * playaudio.c: * Play audio data. * * The game here is that we use threads and fork. Two things you never want to * see together in the same sentence. Presently we only do MPEG data. Because * we can't assume that mpg123 or whatever isn't going to roll over and play * dead if we present it with random stuff we picked up off the network, we * arrange to restart it if it dies. * * Copyright (c) 2002 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #ifdef HAVE_CONFIG_H #include #endif #include "compat.h" #include #include #include #include #include #include /* On many systems (Darwin...), stdio.h is a prerequisite. */ #include #include #include #include #include "util.h" #include "log.h" #include "driftnet.h" #include "playaudio.h" /* The program we use to play MPEG data. Can be changed with -M */ char *audio_mpeg_player = "mpg123 -"; static pthread_mutex_t mpeg_mtx = PTHREAD_MUTEX_INITIALIZER; #define m_lock pthread_mutex_lock(&mpeg_mtx) #define m_unlock pthread_mutex_unlock(&mpeg_mtx) /* audiochunk: * A bit of audio which we are going to throw at the decoder. list represents * the list of all chunks which are available, wr the place that we insert new * data that we've obtained and rd the place that we're reading data to send * into the decoder. */ typedef struct _audiochunk { unsigned char *data; size_t len; struct _audiochunk *next; } *audiochunk; static audiochunk list, wr, rd; /* audiochunk_new: * Allocate a buffer and copy some data into it. */ static audiochunk audiochunk_new(const unsigned char *data, const size_t len) { audiochunk A; alloc_struct(_audiochunk, A); A->len = len; if (data) { A->data = xmalloc(len); memcpy(A->data, data, len); } return A; } /* audiochunk_delete: * Free memory from an audiochunk. */ static void audiochunk_delete(audiochunk A) { xfree(A->data); xfree(A); } /* audiochunk_write: * Write the contents of an audiochunk down a file descriptor. Returns 0 on * success or -1 on failure. */ #define WRCHUNK 1024 static int audiochunk_write(const audiochunk A, int fd) { const unsigned char *p; ssize_t n; if (A->len == 0) return 0; p = A->data; do { size_t d = WRCHUNK; if (p + d > A->data + A->len) d = A->data + A->len - p; n = write(fd, p, d); if (n == -1 && errno != EINTR) return -1; else p += d; } while (p < A->data + A->len); return 0; } /* How much data we have buffered; if this rises too high, we start silently * dropping data. */ static size_t buffered; #define MAX_BUFFERED (8 * 1024 * 1024) /* 8Mb */ /* mpeg_submit_chunk: * Put some MPEG data into the queue to be played. */ void mpeg_submit_chunk(const unsigned char *data, const size_t len) { audiochunk A; m_lock; if (buffered > MAX_BUFFERED) { log_msg(LOG_INFO, "MPEG buffer full with %d bytes", buffered); goto finish; } A = audiochunk_new(data, len); wr->next = A; wr = wr->next; buffered += len; finish: m_unlock; } /* mpeg_play: * Play MPEG data. This runs in a separate thread. The parameter is the * audiochunk from which we start reading data. */ int mpeg_fd; /* the file descriptor into which we write data. */ static void *mpeg_play(void *a) { /*audiochunk A; A = (audiochunk)a;*/ while (1) { /*(!foad) {*/ audiochunk A; m_lock; A = rd->next; m_unlock; if (A) { /* Got some data, submit it to the encoder. */ if (audiochunk_write(A, mpeg_fd) == -1) log_msg(LOG_ERROR, "write to MPEG player: %s", strerror(errno)); m_lock; buffered -= A->len; audiochunk_delete(rd); rd = A; m_unlock; } else { /* No data, sleep for a little bit. */ xnanosleep(100000000); /* 0.1s */ } } return NULL; } /* mpeg_player_manager: * Main loop of child process which keeps an MPEG player running. */ static void mpeg_player_manager(void) { extern sig_atomic_t foad; /* in driftnet.c */ struct sigaction sa = {{0}}; pid_t mpeg_pid; sa.sa_handler = SIG_DFL; sigaction(SIGCHLD, &sa, NULL); while (!foad) { time_t whenstarted; int st; log_msg(LOG_INFO, "starting MPEG player `%s'", audio_mpeg_player); whenstarted = time(NULL); switch ((mpeg_pid = fork())) { case 0: execl("/bin/sh", "/bin/sh", "-c", audio_mpeg_player, NULL); log_msg(LOG_ERROR, "exec: %s", strerror(errno)); unexpected_exit(-1); break; case -1: log_msg(LOG_ERROR, "fork: %s", strerror(errno)); unexpected_exit(-1); /* gah, not much we can do now. */ break; default: /* parent. */ log_msg(LOG_INFO, " MPEG player has PID %d", (int)mpeg_pid); break; } /* wait for it to exit. */ waitpid(mpeg_pid, &st, 0); mpeg_pid = 0; if (WIFEXITED(st)) log_msg(LOG_INFO, "MPEG player exited with status %d", WEXITSTATUS(st)); else if (WIFSIGNALED(st)) log_msg(LOG_INFO, "MPEG player killed by signal %d", WTERMSIG(st)); /* else ?? */ if (!foad && time(NULL) - whenstarted < 5) { /* The player expired very quickly. Probably something's wrong; * sleep for a bit and hope the problem goes away. */ log_msg(LOG_WARNING, "MPEG player expired after %d seconds, sleeping for a bit", (int)(time(NULL) - whenstarted)); sleep(5); } } if (mpeg_pid) kill(mpeg_pid, SIGTERM); } /* do_mpeg_player: * Fork and start a process which keeps an MPEG player running. Then start a * thread which passes data into the player. */ pid_t mpeg_mgr_pid; void do_mpeg_player(void) { int pp[2]; pthread_t thr; rd = wr = list = audiochunk_new(NULL, 0); pipe(pp); mpeg_mgr_pid = fork(); if (mpeg_mgr_pid == 0) { close(pp[1]); dup2(pp[0], 0); /* make pipe our standard input */ mpeg_player_manager(); unexpected_exit(-1); } else { close(pp[0]); mpeg_fd = pp[1]; pthread_create(&thr, NULL, mpeg_play, rd); } /* away we go... */ } driftnet-1.1.2/src/media/playaudio.h000066400000000000000000000006311221437526200173440ustar00rootroot00000000000000/* * playaudio.h: * Play audio data. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * * Copyright (c) 2002 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #ifndef __PLAYAUDIO_H__ #define __PLAYAUDIO_H__ void do_mpeg_player(void); void mpeg_submit_chunk(const unsigned char *data, const size_t len); #endif /* __PLAYAUDIO_H__ */ driftnet-1.1.2/src/media/pngformat.h000066400000000000000000000006431221437526200173550ustar00rootroot00000000000000/* * png.h: * Png file handling. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * */ #ifndef __PNGFORMAT_H__ #define __PNGFORMAT_H__ #ifdef HAVE_CONFIG_H #include #endif #include "compat.h" #define PNG_CODE_LEN 4 #define PNG_CRC_LEN 4 #define PNG_SIG_LEN 8 struct png_chunk { uint32_t datalen; unsigned char code[PNG_CODE_LEN]; }; #endif /*__PNGFORMAT_H__ */ driftnet-1.1.2/src/options.c000066400000000000000000000210521221437526200157640ustar00rootroot00000000000000/* * options.h: * Options parsing. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * */ #ifdef HAVE_CONFIG_H #include #endif #include #include /* On many systems (Darwin...), stdio.h is a prerequisite. */ #include #if HAVE_STRING_H #include #endif #include "compat.h" #include "log.h" #include "driftnet.h" #include "packetcapture.h" #include "options.h" options_t options = {NULL, FALSE, 0, TRUE, FALSE, FALSE, FALSE, TRUE, NULL, NULL, NULL, m_image, NULL, FALSE, FALSE #ifndef NO_DISPLAY_WINDOW ,NULL #endif }; static void validate_options(options_t* options); static void usage(FILE *fp); /* * Handle command-line options */ options_t* parse_options(int argc, char *argv[]) { char optstring[] = "abd:f:hi:M:m:pSsvx:"; int c; opterr = 0; while ((c = getopt(argc, argv, optstring)) != -1) { switch(c) { case 'h': usage(stdout); exit (0); case 'i': if (options.dumpfile) { log_msg(LOG_ERROR, "can't specify -i and -f"); unexpected_exit (-1); } options.interface = optarg; break; case 'v': options.verbose = TRUE; break; case 'b': if (!isatty(1)) log_msg(LOG_WARNING, "can't beep unless standard output is a terminal"); else options.beep = TRUE; break; case 'p': options.promisc = FALSE; break; case 's': options.extract_type |= m_audio; break; case 'S': options.extract_type = m_audio; break; case 'M': options.audio_mpeg_player = optarg; options.mpeg_player_specified = TRUE; break; case 'a': options.adjunct = TRUE; break; case 'm': options.max_tmpfiles = atoi(optarg); if (options.max_tmpfiles <= 0) { log_msg(LOG_ERROR, "`%s' does not make sense for -m", optarg); unexpected_exit (-1); } break; case 'd': options.tmpdir = strdup(optarg); options.tmpdir_especified = TRUE; /* so we don't delete it. */ break; case 'f': if (options.interface) { log_msg(LOG_ERROR, "can't specify -i and -f"); unexpected_exit (-1); } options.dumpfile = optarg; break; #ifndef NO_DISPLAY_WINDOW case 'x': options.savedimgpfx = optarg; options.newpfx = TRUE; break; #endif case '?': default: if (strchr(optstring, optopt)) log_msg(LOG_ERROR, "option -%c requires an argument", optopt); else log_msg(LOG_ERROR, "unrecognised option -%c", optopt); usage(stderr); unexpected_exit (1); } } /* Build up filter. */ if (optind < argc) { if (options.dumpfile) log_msg(LOG_WARNING, "filter code ignored with dump file"); else { char **a; int l; for (a = argv + optind, l = sizeof("tcp and ()"); *a; l += strlen(*a) + 1, ++a); options.filterexpr = calloc(l, 1); strcpy(options.filterexpr, "tcp and ("); for (a = argv + optind; *a; ++a) { strcat(options.filterexpr, *a); if (*(a + 1)) strcat(options.filterexpr, " "); } strcat(options.filterexpr, ")"); } } else options.filterexpr = "tcp"; log_msg(LOG_INFO, "using filter expression `%s'", options.filterexpr); #ifndef NO_DISPLAY_WINDOW if (options.newpfx && !options.adjunct) log_msg(LOG_INFO, "using saved image prefix `%s'", options.savedimgpfx); #endif validate_options(&options); return &options; } void validate_options(options_t* options) { #ifdef NO_DISPLAY_WINDOW if (!options->adjunct) { /* * TODO: assume adjuct mode by default if we were compiled without * display support. */ log_msg(LOG_ERROR, "this version of driftnet was compiled without display support"); log_msg(LOG_ERROR, "use the -a option to run it in adjunct mode"); unexpected_exit (-1); } #endif /* !NO_DISPLAY_WINDOW */ if (!options->dumpfile) { if (!options->interface) { /* TODO: on linux works "any" for all interfaces */ options->interface = get_default_interface(); } } /* Let's not be too fascist about option checking.... */ if (options->max_tmpfiles && !options->adjunct) { log_msg(LOG_WARNING, "-m only makes sense with -a"); options->max_tmpfiles = 0; } if (options->adjunct && options->newpfx) log_msg(LOG_WARNING, "-x ignored -a"); if (options->mpeg_player_specified && !(options->extract_type & m_audio)) log_msg(LOG_WARNING, "-M only makes sense with -s"); if (options->mpeg_player_specified && options->adjunct) log_msg(LOG_WARNING, "-M ignored with -a"); if (options->max_tmpfiles && options->adjunct) log_msg(LOG_INFO, "a maximum of %d images will be buffered", options->max_tmpfiles); if (options->beep && options->adjunct) log_msg(LOG_WARNING, "can't beep in adjunct mode"); } /* usage: * Print usage information. */ void usage(FILE *fp) { fprintf(fp, "driftnet, version %s\n" "Capture images from network traffic and display them in an X window.\n" #ifdef NO_DISPLAY_WINDOW "\n" "Actually, this version of driftnet was compiled with the NO_DISPLAY_WINDOW\n" "option, so that it can only be used in adjunct mode. See below.\n" #endif /* NO_DISPLAY_WINDOW */ "\n" "Synopsis: driftnet [options] [filter code]\n" "\n" "Options:\n" "\n" " -h Display this help message.\n" " -v Verbose operation.\n" " -b Beep when a new image is captured.\n" " -i interface Select the interface on which to listen (default: all\n" " interfaces).\n" " -f file Instead of listening on an interface, read captured\n" " packets from a pcap dump file; file can be a named pipe\n" " for use with Kismet or similar.\n" " -p Do not put the listening interface into promiscuous mode.\n" " -a Adjunct mode: do not display images on screen, but save\n" " them to a temporary directory and announce their names on\n" " standard output.\n" " -m number Maximum number of images to keep in temporary directory\n" " in adjunct mode.\n" " -d directory Use the named temporary directory.\n" " -x prefix Prefix to use when saving images.\n" " -s Attempt to extract streamed audio data from the network,\n" " in addition to images. At present this supports MPEG data\n" " only.\n" " -S Extract streamed audio but not images.\n" " -M command Use the given command to play MPEG audio data extracted\n" " with the -s option; this should process MPEG frames\n" " supplied on standard input. Default: `mpg123 -'.\n" "\n" "Filter code can be specified after any options in the manner of tcpdump(8).\n" "The filter code will be evaluated as `tcp and (user filter code)'\n" "\n" "You can save images to the current directory by clicking on them.\n" "\n" "Adjunct mode is designed to be used by other programs which want to use\n" "driftnet to gather images from the network. With the -m option, driftnet will\n" "silently drop images if more than the specified number of images are saved\n" "in its temporary directory. It is assumed that some other process is\n" "collecting and deleting the image files.\n" "\n" "driftnet, copyright (c) 2001-2 Chris Lightfoot \n" "home page: http://www.ex-parrot.com/~chris/driftnet/\n" "\n" "This program is free software; you can redistribute it and/or modify\n" "it under the terms of the GNU General Public License as published by\n" "the Free Software Foundation; either version 2 of the License, or\n" "(at your option) any later version.\n" "\n", DRIFTNET_VERSION); } driftnet-1.1.2/src/options.h000066400000000000000000000013671221437526200160000ustar00rootroot00000000000000/* * options.h: * Options parsing. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * */ #ifndef __OPTIONS_H__ #define __OPTIONS_H__ #ifdef HAVE_CONFIG_H #include #endif #include "media.h" /* for enum mediatype */ typedef struct { const char *tmpdir; int tmpdir_especified; int max_tmpfiles; int extract_images; int verbose; int adjunct; int beep; int promisc; char *dumpfile; char *interface; char *filterexpr; mediatype_t extract_type; char *audio_mpeg_player; int mpeg_player_specified; int newpfx; #ifndef NO_DISPLAY_WINDOW char *savedimgpfx; #endif } options_t; options_t* parse_options(int argc, char *argv[]); #endif /* __OPTIONS_H__ */ driftnet-1.1.2/src/packetcapture.c000066400000000000000000000202521221437526200171250ustar00rootroot00000000000000/* * pcap.h: * Network packet capture handling. * * Copyright (c) 2001 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * */ #ifdef HAVE_CONFIG_H #include #endif #include #include /* On many systems (Darwin...), stdio.h is a prerequisite. */ #include #include #include /* sig_atomic */ #include /* On Darwin, stdlib.h is a prerequisite. */ #include /* needs to be before on OpenBSD */ #include #ifdef HAVE_LIMITS_H #include #endif #include #include #include #include #include "log.h" #include "driftnet.h" #include "media.h" #include "connection.h" #include "options.h" #include "layer3.h" #include "layer2.h" #include "packetcapture.h" static void process_packet(u_char *user, const struct pcap_pkthdr *hdr, const u_char *pkt); static datalink_info_t get_datalink_info(pcap_t *pcap); #define SNAPLEN 262144 /* largest chunk of data we accept from pcap */ #define WRAPLEN 262144 /* out-of-order packet margin */ /* ugh. */ pcap_t *pc = NULL; datalink_info_t datalink_info; void packetcapture_open_offline(char* dumpfile) { char ebuf[PCAP_ERRBUF_SIZE]; if (!(pc = pcap_open_offline(dumpfile, ebuf))) { log_msg(LOG_ERROR, "pcap_open_offline: %s", ebuf); unexpected_exit (-1); } log_msg(LOG_INFO, "reading packets from %s", dumpfile); datalink_info = get_datalink_info(pc); } void packetcapture_open_live(char* interface, char* filterexpr, int promisc) { char ebuf[PCAP_ERRBUF_SIZE]; struct bpf_program filter; if (!(pc = pcap_open_live(interface, SNAPLEN, promisc, 1000, ebuf))) { log_msg(LOG_ERROR, "pcap_open_live: %s", ebuf); if (getuid() != 0) log_msg(LOG_ERROR, "perhaps you need to be root?"); else if (!interface) log_msg(LOG_ERROR, "perhaps try selecting an interface with the -i option?"); unexpected_exit (-1); } /* Only apply a filter to live packets. Is this right? */ if (pcap_compile(pc, &filter, filterexpr, 1, 0) == -1) { log_msg(LOG_ERROR, "pcap_compile: %s", pcap_geterr(pc)); unexpected_exit (-1); } if (pcap_setfilter(pc, &filter) == -1) { log_msg(LOG_ERROR, "pcap_setfilter: %s", pcap_geterr(pc)); unexpected_exit (-1); } log_msg(LOG_INFO, "listening on %s%s", interface ? interface : "all interfaces", promisc ? " in promiscuous mode" : ""); datalink_info = get_datalink_info(pc); } void packetcapture_close(void) { if (pc != NULL) pcap_close(pc); } char* get_default_interface() { char ebuf[PCAP_ERRBUF_SIZE]; char *interface; interface = pcap_lookupdev(ebuf); if (!interface) { log_msg(LOG_ERROR, "pcap_lookupdev: %s", ebuf); log_msg(LOG_ERROR, "try specifying an interface with -i"); log_msg(LOG_ERROR, "or a pcap capture file with -f"); unexpected_exit (-1); } return interface; } void packetcapture_dispatch(void) { pcap_dispatch(pc, -1, process_packet, NULL); } /* process_packet: * Callback which processes a packet captured by libpcap. */ void process_packet(u_char *user, const struct pcap_pkthdr *hdr, const u_char *pkt) { struct tcphdr tcp; int off, len, delta; connection *C, c; struct sockaddr_storage src, dst; struct sockaddr *s, *d; uint8_t proto; s = (struct sockaddr *)&src; d = (struct sockaddr *)&dst; if (handle_link_layer(&datalink_info, pkt, hdr->caplen, &proto, &off)) return; if (layer3_find_tcp(pkt, proto, &off, s, d, &tcp)) return; len = hdr->caplen - off; /* XXX fragmented packets and other nasties. */ /* try to find the connection slot associated with this. */ C = find_connection(s, d); /* no connection at all, so we need to allocate one. */ if (!C) { log_msg(LOG_INFO, "new connection: %s", connection_string(s,d)); C = alloc_connection(); *C = connection_new(s, d); /* This might or might not be an entirely new connection (SYN flag * set). Either way we need a sequence number to start at. */ (*C)->isn = ntohl(tcp.th_seq); } /* Now we need to process this segment. */ c = *C; delta = 0;/*tcp.syn ? 1 : 0;*/ /* NB (STD0007): * SEG.LEN = the number of octets occupied by the data in the * segment (counting SYN and FIN) */ #if 0 if (tcp.syn) /* getting a new isn. */ c->isn = htonl(tcp.seq); #endif if (tcp.th_flags & TH_RST) { /* Looks like this connection is bogus, and so might be a * connection going the other way. */ log_msg(LOG_INFO, "connection reset: %s", connection_string(s, d)); connection_delete(c); *C = NULL; if ((C = find_connection(d, s))) { connection_delete(*C); *C = NULL; } return; } if (len > 0) { /* We have some data in the packet. If this data occurred after * the first data we collected for this connection, then save it * so that we can look for images. Otherwise, discard it. */ unsigned int offset; offset = ntohl(tcp.th_seq); /* Modulo 2**32 arithmetic; offset = seq - isn + delta. */ if (offset < (c->isn + delta)) offset = 0xffffffff - (c->isn + delta - offset); else offset -= c->isn + delta; if (offset > c->len + WRAPLEN) { /* Out-of-order packet. */ log_msg(LOG_INFO, "out of order packet: %s", connection_string(s, d)); } else { connection_push(c, pkt + off, offset, len); extract_media(c); } } if (tcp.th_flags & TH_FIN) { /* Connection closing; mark it as closed, but let sweep_connections * free it if appropriate. */ log_msg(LOG_INFO, "connection closing: %s, %d bytes transferred", connection_string(s, d), c->len); c->fin = 1; } /* sweep out old connections */ sweep_connections(); } datalink_info_t get_datalink_info(pcap_t *pcap) { datalink_info_t info; //pkt_offset = get_link_level_hdr_length(pcap_datalink(pc)); info.type = pcap_datalink(pcap); info.name = pcap_datalink_val_to_name(pcap_datalink(pcap)); //log_msg(LOG_INFO, "link-level header length is %d bytes", pkt_offset); return info; } #if 0 /* get_link_level_hdr_length: * Find out how long the link-level header is, based on the datalink layer * type. This is based on init_linktype in the libpcap distribution; I * don't know why libpcap doesn't expose the information directly. The * constants here are taken from 0.6.2, but I've added #ifdefs in the hope * that it will still compile with earlier versions. */ int get_link_level_hdr_length(int type) { switch (type) { case DLT_EN10MB: return 14; case DLT_SLIP: return 16; case DLT_SLIP_BSDOS: return 24; case DLT_NULL: #ifdef DLT_LOOP case DLT_LOOP: #endif return 4; case DLT_PPP: #ifdef DLT_C_HDLC case DLT_C_HDLC: #endif #ifdef DLT_PPP_SERIAL case DLT_PPP_SERIAL: #endif return 4; case DLT_PPP_BSDOS: return 24; case DLT_FDDI: return 21; case DLT_IEEE802: return 22; #ifdef DLT_ATM_RFC1483 case DLT_ATM_RFC1483: return 8; #endif #ifdef DLT_PRISM_HEADER case DLT_PRISM_HEADER: return 32; #endif case DLT_RAW: return 0; #ifdef DLT_ATM_CLIP case DLT_ATM_CLIP: /* Linux ATM defines this */ return 8; #endif #ifdef DLT_LINUX_SLL case DLT_LINUX_SLL: /* fake header for Linux cooked socket */ return 16; #endif #ifdef DLT_IEEE802_11 /* 802.11 wireless ethernet */ case DLT_IEEE802_11: return 32; /* 20030606 email from Nikhil Bobb */ /*44; */ #endif default:; } log_msg(LOG_ERROR, "unknown data link type %d", type); unexpected_exit(1); } #endif driftnet-1.1.2/src/packetcapture.h000066400000000000000000000012661221437526200171360ustar00rootroot00000000000000/* * pcap.h: * Network packet capture handling. * * Copyright (c) 2001 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * */ #ifndef __PACKETCAPTURE_H__ #define __PACKETCAPTURE_H__ typedef struct { //int pkt_offset; /* offset of IP packet within wire packet */ int type; const char* name; } datalink_info_t; void packetcapture_open_live(char* interface, char* filterexpr, int promisc); void packetcapture_open_offline(char* dumpfile); void packetcapture_close(void); void packetcapture_dispatch(void); char* get_default_interface(); #endif /* __PACKETCAPTURE_H__ */ driftnet-1.1.2/src/pid.c000066400000000000000000000046711221437526200150550ustar00rootroot00000000000000/* * pid.c * * Handles the pid file on adjunct mode * * Copyright (c) 2013 David Suárez. * Email: david.sephirot@gmail.com * */ #include #include #include #include #include /* On many systems (Darwin...), stdio.h is a prerequisite. */ #include #include #include "log.h" /* * XXX: create the pid in tmp. To create on '/var/run' we need proper permisions. */ #define PID_FILE "/tmp/driftnet.pid" #define PID_BUFSIZE 64 static int pidfile_fd = -1; void create_pidfile() { int flags; char buf[PID_BUFSIZE]; struct flock fl; pidfile_fd = open(PID_FILE, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR); if (pidfile_fd == -1) { log_msg(LOG_ERROR, "Could not open/create PID file %s", PID_FILE); exit (-1); } /* * Set the close-on-exec file descriptor flag * * Instead of the following steps, we could (on Linux) have opened the * file with O_CLOEXEC flag. However, not all systems support open() * O_CLOEXEC (which was standardized only in SUSv4), so instead we use * fcntl() to set the close-on-exec flag after opening the file */ flags = fcntl(pidfile_fd, F_GETFD); if (flags == -1) { log_msg(LOG_ERROR, "Could not get flags for PID file %s", PID_FILE); exit (-1); } flags |= FD_CLOEXEC; if (fcntl(pidfile_fd, F_SETFD, flags) == -1) { log_msg(LOG_ERROR, "Could not set flags for PID file %s", PID_FILE); exit (-1); } fl.l_type = F_WRLCK; fl.l_whence = SEEK_SET; fl.l_start = 0; fl.l_len = 0; if ( fcntl(pidfile_fd, F_SETLK, &fl) == -1) { if (errno == EAGAIN || errno == EACCES) { log_msg(LOG_WARNING, "PID file '%s' is locked; probably the program is already running", PID_FILE); log_msg(LOG_WARNING, "if not, try to remove the file %s", PID_FILE); exit (0); } else { log_msg(LOG_ERROR, "Unable to lock PID file '%s'", PID_FILE); exit (-1); } } if (ftruncate(pidfile_fd, 0) == -1) { log_msg(LOG_ERROR, "Could not truncate PID file '%s'", PID_FILE); close (pidfile_fd); exit (-1); } snprintf(buf, PID_BUFSIZE, "%ld\n", (long) getpid()); if (write(pidfile_fd, buf, strlen(buf)) != strlen(buf)) { log_msg(LOG_ERROR, "writing to PID file '%s'", PID_FILE); close (pidfile_fd); exit (-1); } } void close_pidfile() { if (pidfile_fd > 0) { close (pidfile_fd); pidfile_fd = -1; } } driftnet-1.1.2/src/pid.h000066400000000000000000000003641221437526200150550ustar00rootroot00000000000000/* * pid.h * * Handles the pid file on adjunct mode * * Copyright (c) 2013 David Suárez. * Email: david.sephirot@gmail.com * */ #ifndef __PID_H__ #define __PID_H__ void create_pidfile(); void close_pidfile(); #endif /* __PID_H__ */ driftnet-1.1.2/src/tmpdir.c000066400000000000000000000145341221437526200155770ustar00rootroot00000000000000/* * tmpdir.c: * Temporary directory helpers. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * * Copyright (c) 2001 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #ifdef HAVE_CONFIG_H #include #endif #include "compat.h" #include #include #include #include #include /* On many systems (Darwin...), stdio.h is a prerequisite. */ #include #include #include #include #include #include #include #include #include "util.h" #include "log.h" #include "driftnet.h" #include "tmpdir.h" /* * 'P_tmpdir' is an XSI (X/Open System Interfaces) extension to POSIX which * need not be provided by otherwise conforming implementations. */ #ifdef P_tmpdir #define DEFAULT_TMPDIR P_tmpdir #else #define DEFAULT_TMPDIR "/tmp" #endif #define TEMPFILE_PREFIX "driftnet-" typedef struct { const char *path; tmpdir_type_t type; int max_files; int preserve_files; } tmpdir_t; static tmpdir_t tmpdir = {NULL, TMPDIR_USER_OWNED, 0}; static int is_tempfile(const char* p); static int count_tmpfiles(void); void set_tmpdir(const char *dir, tmpdir_type_t type, int max_files, int preserve_files) { assert (tmpdir.path == NULL); /* we only be called once */ assert (dir != NULL); tmpdir.path = dir; tmpdir.type = type; tmpdir.max_files = max_files; tmpdir.preserve_files = preserve_files; log_msg(LOG_INFO, "using temporary file directory %s", tmpdir.path); } const char* get_tmpdir(void) { assert (tmpdir.path != NULL); return tmpdir.path; } const char* make_tmpdir(void) { char *systmp; char *template; int len; int n; #define TEMPLATE_FILENAME "/drifnet-XXXXXX" /* NOTE: don't use TMPDIR if program is SUID or SGID enabled. */ if (!(systmp = getenv("TMPDIR"))) if (!(systmp = getenv("TEMP"))) if (!(systmp = getenv("TMP"))) systmp = DEFAULT_TMPDIR; len = strlen(systmp); len += strlen(TEMPLATE_FILENAME); len += 1; /* for null */ template = xmalloc(len); n = snprintf(template, len, "%s"TEMPLATE_FILENAME, systmp); if (n > -1 && n < len) { /* we have it. */ char *tmp; tmp = mkdtemp(template); if (tmp == NULL) { xfree(template); /* useless... */ log_msg(LOG_ERROR, "make_tmpdir(), mkdtemp: %s", strerror(errno)); unexpected_exit (-1); } return tmp; } if (n < 0) { /* we have an error on snprintf */ log_msg(LOG_ERROR, "make_tmpdir(), snprintf: %s", strerror(errno)); } else { /* logic error... */ log_msg(LOG_ERROR, "make_tmpdir(), internal error"); } unexpected_exit (-1); return NULL; /* make GCC happy */ } /* * clean_tmpdir: * Ensure that our temporary directory is clear of any files. */ void clean_tmpdir() { DIR *d; if (tmpdir.path == NULL) return; if (!tmpdir.preserve_files) { /* * If user_specified is true, the user specified a particular temporary * directory. We presume that the user doesn't want the directory removed * and that we shouldn't nuke any files in that directory which don't look * like ours * * If not, remove it. */ d = opendir(tmpdir.path); if (d) { struct dirent *de; char *buf; size_t buflen; buf = xmalloc(buflen = strlen(tmpdir.path) + 64); while ((de = readdir(d))) { if (is_tempfile(de->d_name)) { if (buflen < strlen(tmpdir.path) + strlen(de->d_name) + 1) buf = xrealloc(buf, buflen = strlen(tmpdir.path) + strlen(de->d_name) + 64); sprintf(buf, "%s/%s", tmpdir.path, de->d_name); unlink(buf); } } closedir(d); xfree(buf); } if (tmpdir.type == TMPDIR_APP_OWNED) { if ( rmdir(tmpdir.path) == -1 && errno != ENOENT) /* lame attempt to avoid race */ log_msg(LOG_ERROR, "rmdir(%s): %s", tmpdir.path, strerror(errno)); } } xfree((void*)tmpdir.path); /* we don't need it anymore */ tmpdir.path = NULL; } int check_dir_is_rw(const char* dir) { struct stat st; if (stat(dir, &st) == -1) { log_msg(LOG_ERROR, "stat(%s): %s", dir, strerror(errno)); unexpected_exit (-1); } else if (!S_ISDIR(st.st_mode)) { log_msg(LOG_ERROR, "%s: not a directory", dir); unexpected_exit (-1); /* access is unsafe but we don't really care. */ } else if (access(dir, R_OK | W_OK) != 0) { log_msg(LOG_ERROR, "%s: %s", dir, strerror(errno)); unexpected_exit (-1); } return 0; } const char* tmpfile_write(const char* mname, const unsigned char *data, const size_t len) { static char name[TMPNAMELEN] = {0}; char *buf; int fd; buf = xmalloc(strlen(tmpdir.path) + TMPNAMELEN); sprintf(name, TEMPFILE_PREFIX"%08x%08x.%s", (unsigned int)time(NULL), rand(), mname); sprintf(buf, "%s/%s", tmpdir.path, name); fd = open(buf, O_WRONLY | O_CREAT | O_EXCL, 0644); if (fd == -1) { log_msg(LOG_WARNING, "can't open %s for writing", buf); return NULL; } write(fd, data, len); close(fd); xfree(buf); return name; } /* count_temporary_files: * How many of our files remain in the temporary directory? We do this a * maximum of once every five seconds. */ int count_tmpfiles(void) { static int num; static time_t last_counted; if (last_counted < time(NULL) - 5) { DIR *d; struct dirent *de; num = 0; d = opendir(tmpdir.path); if (d) { while ((de = readdir(d))) { if (is_tempfile(de->d_name)) ++num; } closedir(d); last_counted = time(NULL); } } return num; } static int is_tempfile(const char* file) { assert (file != NULL); char *p = strrchr(file, '.'); /* get the file extension */ /* XXX: get media files extensions from their respect media driver */ if (p && (strncmp (file, TEMPFILE_PREFIX, 9) == 0) && (strcmp (p, ".jpeg")==0 || strcmp (p, ".gif")==0 || strcmp (p, ".mp3")==0 || strcmp (p, ".png")==0 )) { return TRUE; } return FALSE; } int tmpfiles_limit_reached(void) { if (tmpdir.max_files == 0 || count_tmpfiles() < tmpdir.max_files) { return FALSE; } return TRUE; } driftnet-1.1.2/src/tmpdir.h000066400000000000000000000013401221437526200155730ustar00rootroot00000000000000/* * tmpdir.h: * Temporary directory helpers. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * */ #ifndef __TMPDIR_H__ #define __TMPDIR_H__ #ifdef HAVE_CONFIG_H #include #endif /* max filename length for a temp file */ #define TMPNAMELEN 64 typedef enum { TMPDIR_APP_OWNED = 0, TMPDIR_USER_OWNED = 1 } tmpdir_type_t; void set_tmpdir(const char *dir, tmpdir_type_t type, int max_files, int preserve_files); const char* get_tmpdir(void); void clean_tmpdir(); const char* make_tmpdir(void); int check_dir_is_rw(const char* tmpdir); int tmpfiles_limit_reached(void); const char* tmpfile_write(const char *mname, const unsigned char *data, const size_t len); #endif /* __TMPDIR_H__ */ driftnet-1.1.2/src/util.c000066400000000000000000000046111221437526200152500ustar00rootroot00000000000000/* * util.c: * Various utility functions. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * * Copyright (c) 2003 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #ifdef HAVE_CONFIG_H #include #endif #include "compat.h" #include #include #include /* On many systems (Darwin...), stdio.h is a prerequisite. */ #if HAVE_STRING_H #include #endif #if HAVE_NANOSLEEP #include //#include #elif HAVE_USLEEP #include #endif #include "util.h" /* xmalloc COUNT * Malloc, and abort if malloc fails. */ void *xmalloc(size_t n) { void *v; v = malloc(n); if (!v) abort(); return v; } /* xcalloc NITEMS COUNT * As above. */ void *xcalloc(size_t n, size_t m) { void *v; v = calloc(n, m); if (!v) abort(); return v; } /* xrealloc PTR COUNT * As above. */ void *xrealloc(void *w, size_t n) { void *v; v = realloc(w, n); if (n != 0 && !v) abort(); return v; } /* xfree PTR * Free, ignoring a passed NULL value. */ void xfree(void *v) { if (v) free(v); } /* xstrdup: * Strdup, aborting on failure. */ char *xstrdup(const char *s) { char *t; t = xmalloc(strlen(s) + 1); strcpy(t, s); return t; } /* memstr: * Locate needle, of length n_len, in haystack, of length h_len, returning NULL. */ unsigned char *memstr(const unsigned char *haystack, const size_t hlen, const unsigned char *needle, const size_t nlen) { const unsigned char *p = haystack; for (; p <= (haystack - nlen + hlen); p++) { if (memcmp(p, needle, nlen) == 0) return (unsigned char*) p; /* found */ } return NULL; } void xnanosleep(long nanosecs) { #if HAVE_NANOSLEEP struct timespec tm = {0, nanosecs}; nanosleep(&tm, NULL); #elif HAVE_USLEEP unsigned int microsecs = (nanosecs < 1000) ? 1 : nanosecs / 1000; usleep(microsecs); /* obsolete: POSIX.1-2001 */ #else /* sleep() can't help ... */ #error cannot find an usable sleep function #endif } /* * dump_data * * Print some binary data on a file descriptor. * * XXX: Unused */ void dump_data(FILE *fp, const unsigned char *data, const unsigned int len) { const unsigned char *p; for (p = data; p < data + len; ++p) { if (isprint((int)*p)) fputc(*p, fp); else fprintf(fp, "\\x%02x", (unsigned int)*p); } } driftnet-1.1.2/src/util.h000066400000000000000000000013321221437526200152520ustar00rootroot00000000000000 /* * util.h: * Helper functions. * * Copyright (c) 2012 David Suárez. * Email: david.sephirot@gmail.com * * Copyright (c) 2002 Chris Lightfoot. * Email: chris@ex-parrot.com; WWW: http://www.ex-parrot.com/~chris/ * */ #ifndef __UTIL_H__ #define __UTIL_H__ #ifdef HAVE_CONFIG_H #include #endif void *xmalloc(size_t n); void *xcalloc(size_t n, size_t m); void *xrealloc(void *w, size_t n); void xfree(void *v); char *xstrdup(const char *s); unsigned char *memstr(const unsigned char *haystack, const size_t hlen, const unsigned char *needle, const size_t nlen); void xnanosleep(long nanosecs); //void dump_data(FILE *fp, const unsigned char *data, const unsigned int len); #endif /* __UTIL_H__ */