diff options
| -rw-r--r-- | AUTHORS | 1 | ||||
| -rw-r--r-- | COPYING | 339 | ||||
| -rw-r--r-- | ChangeLog | 1 | ||||
| -rw-r--r-- | INSTALL | 4 | ||||
| -rw-r--r-- | Makefile.am | 29 | ||||
| -rw-r--r-- | NEWS | 1 | ||||
| -rw-r--r-- | README.md | 26 | ||||
| -rw-r--r-- | config.h.in | 69 | ||||
| -rw-r--r-- | configure.ac | 35 | ||||
| -rw-r--r-- | doc/HEADER.c | 16 | ||||
| -rwxr-xr-x | doit | 23 | ||||
| -rwxr-xr-x | doit.rm | 6 | ||||
| -rwxr-xr-x | example/example.ipv4.wget | 3 | ||||
| -rwxr-xr-x | example/example.ipv6.wget | 3 | ||||
| -rw-r--r-- | force-ip-protocol-ipv4-or-ipv6.c | 50 | ||||
| -rwxr-xr-x | ipv4 | 30 | ||||
| -rwxr-xr-x | ipv6 | 30 | ||||
| -rw-r--r-- | man/ipv4.1 | 15 | ||||
| -rw-r--r-- | man/ipv6.1 | 15 |
19 files changed, 696 insertions, 0 deletions
@@ -0,0 +1 @@ +Thorsten Alteholz <thorsten@alteholz.dev> @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 Lesser 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. 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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. 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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. + + <one line to give the program's name and a brief idea of what it does.> + Copyright (C) <year> <name of author> + + 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., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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) year 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. + + <signature of Ty Coon>, 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 Lesser General +Public License instead of this License. diff --git a/ChangeLog b/ChangeLog new file mode 100644 index 0000000..c0e4a3b --- /dev/null +++ b/ChangeLog @@ -0,0 +1 @@ +Nothing to be entered here. @@ -0,0 +1,4 @@ +./doit +./configure +make +make install diff --git a/Makefile.am b/Makefile.am new file mode 100644 index 0000000..2e46050 --- /dev/null +++ b/Makefile.am @@ -0,0 +1,29 @@ +# +# force-ip-protocol +# Copyright (C) 2023 Thorsten Alteholz +# +# 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, version 2 of the License. +# +# 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, see <http://www.gnu.org/licenses/>. +# + +ACLOCAL_AMFLAGS = -I m4 + +lib_LTLIBRARIES=libforce-ip-protocol-ipv4.la libforce-ip-protocol-ipv6.la + +libforce_ip_protocol_ipv6_la_SOURCES=force-ip-protocol-ipv4-or-ipv6.c +libforce_ip_protocol_ipv6_la_CFLAGS=-fPIC -DUSE_IPV6 +libforce_ip_protocol_ipv6_la_LDFLAGS= -shared -fPIC + +libforce_ip_protocol_ipv4_la_SOURCES=force-ip-protocol-ipv4-or-ipv6.c +libforce_ip_protocol_ipv4_la_CFLAGS=-fPIC -DUSE_IPV4 +libforce_ip_protocol_ipv4_la_LDFLAGS= -shared -fPIC + @@ -0,0 +1 @@ +no NEWS are good NEWS diff --git a/README.md b/README.md new file mode 100644 index 0000000..3757427 --- /dev/null +++ b/README.md @@ -0,0 +1,26 @@ +# force-ip-protocol + +## Description + +This library forces other software to use only IPv4 or IPv6 for network connections. + +A library will be LD_PRELOADed which replaces function getaddrinfo() +by its own version. This version limits the available sockets to ones of +type PF_INET/PF_INTE6 and such limits all network traffic to a certain protocol + +## Installation + +Please see INSTALL. + +## Usage + +ipv4 wget http://www.t-online.de + +## Authors and acknowledgment + +Please see AUTHORS. + +## License + +This software is licensed under GPL-2.0-only. + diff --git a/config.h.in b/config.h.in new file mode 100644 index 0000000..39aba0a --- /dev/null +++ b/config.h.in @@ -0,0 +1,69 @@ +/* config.h.in. Generated from configure.ac by autoheader. */ + +/* Define to 1 if you have the <dlfcn.h> header file. */ +#undef HAVE_DLFCN_H + +/* Define to 1 if you have the <inttypes.h> header file. */ +#undef HAVE_INTTYPES_H + +/* Define to 1 if you have the <netdb.h> header file. */ +#undef HAVE_NETDB_H + +/* Define to 1 if you have the <stdint.h> header file. */ +#undef HAVE_STDINT_H + +/* Define to 1 if you have the <stdio.h> header file. */ +#undef HAVE_STDIO_H + +/* Define to 1 if you have the <stdlib.h> header file. */ +#undef HAVE_STDLIB_H + +/* Define to 1 if you have the <strings.h> header file. */ +#undef HAVE_STRINGS_H + +/* Define to 1 if you have the <string.h> header file. */ +#undef HAVE_STRING_H + +/* Define to 1 if you have the <sys/socket.h> header file. */ +#undef HAVE_SYS_SOCKET_H + +/* Define to 1 if you have the <sys/stat.h> header file. */ +#undef HAVE_SYS_STAT_H + +/* Define to 1 if you have the <sys/types.h> header file. */ +#undef HAVE_SYS_TYPES_H + +/* Define to 1 if you have the <unistd.h> header file. */ +#undef HAVE_UNISTD_H + +/* Define to the sub-directory where libtool stores uninstalled libraries. */ +#undef LT_OBJDIR + +/* 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 all of the C90 standard headers exist (not just the ones + required in a freestanding environment). This macro is provided for + backward compatibility; new code need not use it. */ +#undef STDC_HEADERS + +/* Version number of package */ +#undef VERSION diff --git a/configure.ac b/configure.ac new file mode 100644 index 0000000..ef5dd8d --- /dev/null +++ b/configure.ac @@ -0,0 +1,35 @@ +# +# force-ip-protocol +# Copyright (C) 2023 Thorsten Alteholz +# +# 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, version 2 of the License. +# +# 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, see <http://www.gnu.org/licenses/>. +# + +AC_INIT([force-ip-protocol], [0.2.0], [thorsten@alteholz.dev]) + +AM_INIT_AUTOMAKE +LT_INIT() + +AC_CONFIG_MACRO_DIRS([m4]) +AC_CONFIG_HEADERS([config.h:config.h.in]) +AC_CHECK_HEADERS([sys/socket.h]) +AC_CHECK_HEADERS([netdb.h]) + + +AC_PROG_CC +AC_CONFIG_FILES([Makefile]) + +AC_ENABLE_SHARED +AC_DISABLE_STATIC + +AC_OUTPUT diff --git a/doc/HEADER.c b/doc/HEADER.c new file mode 100644 index 0000000..f2e60fa --- /dev/null +++ b/doc/HEADER.c @@ -0,0 +1,16 @@ +// +// force-ip-protocol +// Copyright (C) 2023 Thorsten Alteholz +// +// 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, version 2 of the License. +// +// 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, see <http://www.gnu.org/licenses/>. +// @@ -0,0 +1,23 @@ +#!/bin/bash +# +# force-ip-protocol +# Copyright (C) 2023 Thorsten Alteholz +# +# 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, version 2 of the License. +# +# 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, see <http://www.gnu.org/licenses/>. +# + +libtoolize +aclocal +autoconf +autoheader +automake --add-missing @@ -0,0 +1,6 @@ +#!/bin/bash + +rm -f compile config.guess config.sub depcomp install-sh ltmain.sh missing + +rm -f aclocal.m4 configure Makefile.in +rm -rf autom4te.cache/ m4/ diff --git a/example/example.ipv4.wget b/example/example.ipv4.wget new file mode 100755 index 0000000..d0620ff --- /dev/null +++ b/example/example.ipv4.wget @@ -0,0 +1,3 @@ +#!/bin/bash + +ipv4 wget http://www.t-online.de diff --git a/example/example.ipv6.wget b/example/example.ipv6.wget new file mode 100755 index 0000000..e11d795 --- /dev/null +++ b/example/example.ipv6.wget @@ -0,0 +1,3 @@ +#!/bin/bash + +ipv6 wget http://www.t-online.de diff --git a/force-ip-protocol-ipv4-or-ipv6.c b/force-ip-protocol-ipv4-or-ipv6.c new file mode 100644 index 0000000..bd366ff --- /dev/null +++ b/force-ip-protocol-ipv4-or-ipv6.c @@ -0,0 +1,50 @@ +/* + force-ip-protocol + Copyright (C) 2023 Thorsten Alteholz + + 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, version 2 of the License. + + 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, see <http://www.gnu.org/licenses/>. + + usage: LD_PRELOAD=/path/to/library.so program args ... + */ + +#include <config.h> + +#ifdef HAVE_SYS_SOCKET_H + #include <sys/socket.h> +#endif + +#ifdef HAVE_NETDB_H + #include <netdb.h> +#endif + +#ifdef HAVE_DLFCN_H + #include <dlfcn.h> +#endif + +int getaddrinfo(const char *hostname, const char *servname, + const struct addrinfo *hints, struct addrinfo **res) +{ + int (*getaddrinfo_org)(); + struct addrinfo *hints2 = (struct addrinfo *) hints; + + getaddrinfo_org = dlsym(RTLD_NEXT, "getaddrinfo"); +#if defined USE_IPV4 + hints2->ai_family = PF_INET; +#elif defined USE_IPV6 + hints2->ai_family = PF_INET6; +#else +#error You must define either USE_IPV4 or USE_IPV6. +#endif + + return (getaddrinfo_org(hostname, servname, hints2, res)); +} @@ -0,0 +1,30 @@ +#!/bin/bash +# +# force-ip-protocol +# Copyright (C) 2023 Thorsten Alteholz +# +# 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, version 2 of the License. +# +# 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, see <http://www.gnu.org/licenses/>. +# + +LIBNAME=libforce-ip-protocol-ipv4.so +LIB=/usr/lib/*/$LIBNAME + +if [ -f $LIB ]; then + LD_PRELOAD=$LIB "$@" +elif [ -f ./.libs/$LIBNAME ]; then + LD_PRELOAD=./.libs/$LIBNAME "$@" +else + echo "$LIBNAME not found" + exit 1 +fi + @@ -0,0 +1,30 @@ +#!/bin/bash +# +# force-ip-protocol +# Copyright (C) 2023 Thorsten Alteholz +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, version 2 of the License. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# + +LIBNAME=libforce-ip-protocol-ipv6.so +LIB=/usr/lib/*/$LIBNAME + +if [ -f $LIB ]; then + LD_PRELOAD=$LIB "$@" +elif [ -f ./.libs/$LIBNAME ]; then + LD_PRELOAD=./.libs/$LIBNAME "$@" +else + echo "$LIBNAME not found" + exit 1 +fi + diff --git a/man/ipv4.1 b/man/ipv4.1 new file mode 100644 index 0000000..66a1a98 --- /dev/null +++ b/man/ipv4.1 @@ -0,0 +1,15 @@ +.\"TOPICS "Topics:" +.TH IPV4 1 "May" "ipv4" "" +.SH "NAME" +ipv4 \- force other software to use only IPv4 for network connections + +.SH "DESCRIPTION" + +This software LD_PRELOADs a library which replaces function getaddrinfo() +by its own version. This version limits the available sockets to ones of +type PF_INET and such limits all network traffic to IPv4. + +.SH "AUTHORS" +Authors and contributors are listed in the AUTHORS file in the source +distribution. + diff --git a/man/ipv6.1 b/man/ipv6.1 new file mode 100644 index 0000000..113e8fe --- /dev/null +++ b/man/ipv6.1 @@ -0,0 +1,15 @@ +.\"TOPICS "Topics:" +.TH IPV6 1 "May" "ipv6" "" +.SH "NAME" +ipv6 \- force other software to use only IPv6 for network connections + +.SH "DESCRIPTION" + +This software LD_PRELOADs a library which replaces function getaddrinfo() +by its own version. This version limits the available sockets to ones of +type PF_INET6 and such limits all network traffic to IPv6. + +.SH "AUTHORS" +Authors and contributors are listed in the AUTHORS file in the source +distribution. + |