diff --git a/AUTHORS b/AUTHORS new file mode 100644 index 0000000..1b5b73b --- /dev/null +++ b/AUTHORS @@ -0,0 +1,18 @@ +vecna + +pub 1024D/C6765430 2009-08-25 [expires: 2011-08-25] + Key fingerprint = 341F 1A8C E2B4 F4F4 174D 7C21 B842 093D C676 5430 +uid vecna +uid vecna +sub 3072g/E8157737 2009-08-25 [expires: 2011-08-25] +---------------------------------------------------------------------------- +evilaliv3 +sub 4096g/50A7F150 2009-05-10 [expires: 2014-05-09] +---------------------------------------------------------------------------- + +GITHUB: +http://github.com/evilaliv3/mitmif diff --git a/CMakeLists.txt b/CMakeLists.txt new file mode 100644 index 0000000..e14cb9c --- /dev/null +++ b/CMakeLists.txt @@ -0,0 +1,28 @@ +CMAKE_MINIMUM_REQUIRED( VERSION 2.4 ) + +PROJECT( janus ) + +SET(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/modules/") + +# Initializing libEvent +FIND_PACKAGE(Event) +INCLUDE_DIRECTORIES(${EVENT_INCLUDE_DIR}) + +ADD_SUBDIRECTORY( src ) + +INSTALL( FILES doc/janus.1 + DESTINATION man/man1 + PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ ) + +# begin uninstall target +CONFIGURE_FILE( + "${CMAKE_CURRENT_SOURCE_DIR}/cmake_uninstall.cmake.in" + "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake" + IMMEDIATE @ONLY +) + +ADD_CUSTOM_TARGET( + uninstall + COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake +) +# end of uninstall target diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..94a9ed0 --- /dev/null +++ b/COPYING @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program 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, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU 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. But first, please read +. diff --git a/ChangeLog b/ChangeLog new file mode 100644 index 0000000..e69de29 diff --git a/NEWS b/NEWS new file mode 100644 index 0000000..e69de29 diff --git a/README b/README new file mode 120000 index 0000000..42061c0 --- /dev/null +++ b/README @@ -0,0 +1 @@ +README.md \ No newline at end of file diff --git a/README.md b/README.md new file mode 100644 index 0000000..446de35 --- /dev/null +++ b/README.md @@ -0,0 +1,95 @@ +# Janus is a portable, unified and lightweight interface for mitm applications over the routing table. + +It acts like a deamon and offers two simple stream sockets, one for input and one for the output traffic manipulations. +Over this sockets, before a packet, it's always appended it's size (16bit), and Janus expects to receive data back with this precise format. +The code is a portable and optimized rewrite of a first idea implemented in SniffJoke software written by Claudio Agosti. +Janus overrides the actual routing table, creating a fake gateway with the aim to block packets after the kernel (on outgoing traffic) and before the kernel (on incoming traffic). + +# Requirements + + cmake, gcc, iptables, route, sed + +# Below are some examples starting from this common routing table: + + root@linux# route -n + Kernel IP routing table + Destination Gateway Genmask Flags Metric Ref Use Iface + 94.23.192.28 10.196.136.1 255.255.255.255 UGH 0 0 0 eth0 + 94.228.214.57 10.196.135.1 255.255.255.255 UGH 0 0 0 eth1 + 10.196.135.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 + 10.196.136.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 + 0.0.0.0 10.196.136.1 0.0.0.0 UG 0 0 0 eth0 + + +#1st Example: Simple immediate exection (by default Janus executes a mitm over the default gateway) + root@linux# janus + Janus is now going to background, use SIGTERM to stop it. + + root@linux# route -n + Kernel IP routing table + Destination Gateway Genmask Flags Metric Ref Use Iface + 94.23.192.28 10.196.135.1 255.255.255.255 UGH 0 0 0 eth0 + 94.228.214.57 10.196.136.1 255.255.255.255 UGH 0 0 0 eth1 + 10.196.135.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 + 10.196.136.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 + 212.77.1.1 0.0.0.0 255.255.255.255 UH 0 0 0 janus0 + 0.0.0.0 212.77.1.1 0.0.0.0 UG 0 0 0 janus0 + + +#2nd Example: Custom execution (single janus instance) + root@linux# janus --net 94.23.192.28/255.255.255.255 + Janus is now going to background, use SIGTERM to stop it. + + root@linux# route -n + Kernel IP routing table + Destination Gateway Genmask Flags Metric Ref Use Iface + 94.23.192.28 212.77.1.1 255.255.255.255 UGH 0 0 0 janus0 + 94.228.214.57 10.196.136.1 255.255.255.255 UGH 0 0 0 eth1 + 10.196.135.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 + 10.196.136.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 + 212.77.1.1 0.0.0.0 255.255.255.255 UH 0 0 0 janus0 + 0.0.0.0 10.196.135.1 0.0.0.0 UG 0 0 0 eth0 + +#3rd Example: Custom execution (multiple janus instance, two for example) + root@linux# janus --net 94.23.192.28/255.255.255.255 --listen-port-in 4001 --listen-port-out 4002 + Janus is now going to background, use SIGTERM to stop it. + + root@linux# janus --net 94.228.214.57/255.255.255.255 --listen-port-in 5001 --listen-port-out 5002 + Janus is now going to background, use SIGTERM to stop it. + + root@linux# route -n + Kernel IP routing table + Destination Gateway Genmask Flags Metric Ref Use Iface + 94.23.192.28 212.77.1.1 255.255.255.255 UGH 0 0 0 janus0 + 94.228.214.57 212.77.1.2 255.255.255.255 UGH 0 0 0 janus1 + 10.196.135.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 + 10.196.136.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 + 212.77.1.1 0.0.0.0 255.255.255.255 UH 0 0 0 janus0 + 212.77.1.2 0.0.0.0 255.255.255.255 UH 0 0 0 janus1 + 0.0.0.0 10.196.135.1 0.0.0.0 UG 0 0 0 eth0 + +## Installed files (paths may vary on your system) + +Janus binary /usr/local/sbin/janus + +Janus man page /usr/local/man/man1/janus.1 + +Official Janus page: + https://github.com/evilaliv3/janus + +# GPG public keys + + X-2:~ X$ gpg --keyserver pgp.mit.edu --recv-key D9A950DE + X-2:~ X$ gpg --fingerprint --list-keys D9A950DE + pub 1024D/D9A950DE 2009-05-10 [expires: 2014-05-09] + Key fingerprint = C1ED 5C8F DB6A 1C74 A807 5695 91EC 9BB8 D9A9 50DE + uid Giovanni Pellerano + sub 4096g/50A7F150 2009-05-10 [expires: 2014-05-09] + + X-2:~ X$ gpg --keyserver pgp.mit.edu --recv-key C6765430 + X-2:~ X$ gpg --fingerprint --list-keys C6765430 + pub 1024D/C6765430 2009-08-25 [expires: 2011-08-25] + Key fingerprint = 341F 1A8C E2B4 F4F4 174D 7C21 B842 093D C676 5430 + uid vecna + uid vecna + sub 3072g/E8157737 2009-08-25 [expires: 2011-08-25] diff --git a/cmake_uninstall.cmake.in b/cmake_uninstall.cmake.in new file mode 100644 index 0000000..e188fe5 --- /dev/null +++ b/cmake_uninstall.cmake.in @@ -0,0 +1,20 @@ +IF (NOT EXISTS "@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt") + MESSAGE(FATAL_ERROR "Cannot find install manifest: \"@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt\"") +ENDIF(NOT EXISTS "@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt") + +FILE(READ "@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt" files) +STRING(REGEX REPLACE "\n" ";" files "${files}") +FOREACH (file ${files}) + IF (EXISTS "$ENV{DESTDIR}${file}") + EXECUTE_PROCESS( + COMMAND @CMAKE_COMMAND@ -E remove "$ENV{DESTDIR}${file}" + OUTPUT_VARIABLE rm_out + RESULT_VARIABLE rm_retval + ) + IF(NOT ${rm_retval} EQUAL 0) + MESSAGE(FATAL_ERROR "Problem when removing \"$ENV{DESTDIR}${file}\"") + ENDIF (NOT ${rm_retval} EQUAL 0) + ELSE (EXISTS "$ENV{DESTDIR}${file}") + MESSAGE(STATUS "File \"$ENV{DESTDIR}${file}\" does not exist.") + ENDIF (EXISTS "$ENV{DESTDIR}${file}") +ENDFOREACH(file) diff --git a/doc/janus.1 b/doc/janus.1 new file mode 100644 index 0000000..2473aa8 --- /dev/null +++ b/doc/janus.1 @@ -0,0 +1,45 @@ +.TH Janus 1 +.PP +.SH NAME +Janus 1.0 usage +.PP +.SH SYNOPSIS +Janus [OPTION]... +.PP +.SH DESCRIPTION +Janus is a portable interface for mitm applications over the routing table. +.PP +It acts like a deamon and offers two simple stream sockets, one for the input and one for the output manipulations. +.PP +Over this sockets, before a packet, it's always appended it's size (16bit), and Janus expects to receive data back with this precise format. +.PP +The code is a portable and optimized rewrite of a first idea implemented in SniffJoke software written by Claudio Agosti. +.PP +The software overrides the actual routing table, creating a fake gateway with the aim to block packets after the kernel (on outgouing traffic) and before the kernel (on incoming traffic) +.PP +The options usefull when Janus is started are: +.PP +.SH JANUS OPTIONS +.PP +.B --net [default: 0.0.0.0/0.0.0.0] +.PP +.B --listen-ip-addres [default: 127.0.0.1] +.PP +.B --listen-port-in [default: 30201] +.PP +.B --listen-port-out [default: 10203] +.PP +.B --version +show Janus version +.PP +.B --help +show a command line options resume +.PP +.PP +.SH "AUTHOR" +Giovanni Pellerano , Claudio Agosti +.PP +.SH "REPORTING BUGS" +Report bugs to . +.SH "COPYRIGHT" +Copyright (GPL) 2011 Giovanni Pellerano & Claudio Agosti diff --git a/modules/FindEvent.cmake b/modules/FindEvent.cmake new file mode 100644 index 0000000..7ce2ec7 --- /dev/null +++ b/modules/FindEvent.cmake @@ -0,0 +1,18 @@ +FIND_PATH(EVENT_INCLUDE_DIR event.h) + +SET(EVENT_NAMES ${EVENT_NAMES} event libevent) +FIND_LIBRARY(EVENT_LIBRARY NAMES ${EVENT_NAMES} PATH) + +IF(EVENT_INCLUDE_DIR AND EVENT_LIBRARY) + SET(EVENT_FOUND TRUE) +ENDIF(EVENT_INCLUDE_DIR AND EVENT_LIBRARY) + +IF(EVENT_FOUND) + IF(NOT Event_FIND_QUIETLY) + MESSAGE(STATUS "Found Event: ${EVENT_LIBRARY}") + ENDIF (NOT Event_FIND_QUIETLY) +ELSE(EVENT_FOUND) + IF(Event_FIND_REQUIRED) + MESSAGE(FATAL_ERROR "Could not find event") + ENDIF(Event_FIND_REQUIRED) +ENDIF (EVENT_FOUND) diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt new file mode 100644 index 0000000..32d3fb2 --- /dev/null +++ b/src/CMakeLists.txt @@ -0,0 +1,11 @@ +ADD_EXECUTABLE( janus + packet_queue + janus + main ) + +INSTALL( TARGETS janus + RUNTIME DESTINATION /usr/local/sbin ) + +SET( CMAKE_C_FLAGS "-O3 -Wall -g3 -pedantic ${CMAKE_C_FLAGS}" ) + +TARGET_LINK_LIBRARIES( janus "-levent" ) diff --git a/src/Makefile b/src/Makefile new file mode 100644 index 0000000..b07fa2a --- /dev/null +++ b/src/Makefile @@ -0,0 +1,233 @@ +# CMAKE generated file: DO NOT EDIT! +# Generated by "Unix Makefiles" Generator, CMake Version 2.8 + +# Default target executed when no arguments are given to make. +default_target: all +.PHONY : default_target + +#============================================================================= +# Special targets provided by cmake. + +# Disable implicit rules so canoncical targets will work. +.SUFFIXES: + +# Remove some rules from gmake that .SUFFIXES does not remove. +SUFFIXES = + +.SUFFIXES: .hpux_make_needs_suffix_list + +# Suppress display of executed commands. +$(VERBOSE).SILENT: + +# A target that is always out of date. +cmake_force: +.PHONY : cmake_force + +#============================================================================= +# Set environment variables for the build. + +# The shell in which to execute make rules. +SHELL = /bin/sh + +# The CMake executable. +CMAKE_COMMAND = /usr/bin/cmake + +# The command to remove a file. +RM = /usr/bin/cmake -E remove -f + +# The top-level source directory on which CMake was run. +CMAKE_SOURCE_DIR = /home/evilaliv3/Desktop/janus + +# The top-level build directory on which CMake was run. +CMAKE_BINARY_DIR = /home/evilaliv3/Desktop/janus + +#============================================================================= +# Targets provided globally by CMake. + +# Special rule for the target edit_cache +edit_cache: + @$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "Running interactive CMake command-line interface..." + /usr/bin/cmake -i . +.PHONY : edit_cache + +# Special rule for the target edit_cache +edit_cache/fast: edit_cache +.PHONY : edit_cache/fast + +# Special rule for the target install +install: preinstall + @$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "Install the project..." + /usr/bin/cmake -P cmake_install.cmake +.PHONY : install + +# Special rule for the target install +install/fast: preinstall/fast + @$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "Install the project..." + /usr/bin/cmake -P cmake_install.cmake +.PHONY : install/fast + +# Special rule for the target install/local +install/local: preinstall + @$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "Installing only the local directory..." + /usr/bin/cmake -DCMAKE_INSTALL_LOCAL_ONLY=1 -P cmake_install.cmake +.PHONY : install/local + +# Special rule for the target install/local +install/local/fast: install/local +.PHONY : install/local/fast + +# Special rule for the target install/strip +install/strip: preinstall + @$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "Installing the project stripped..." + /usr/bin/cmake -DCMAKE_INSTALL_DO_STRIP=1 -P cmake_install.cmake +.PHONY : install/strip + +# Special rule for the target install/strip +install/strip/fast: install/strip +.PHONY : install/strip/fast + +# Special rule for the target list_install_components +list_install_components: + @$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "Available install components are: \"Unspecified\"" +.PHONY : list_install_components + +# Special rule for the target list_install_components +list_install_components/fast: list_install_components +.PHONY : list_install_components/fast + +# Special rule for the target rebuild_cache +rebuild_cache: + @$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --cyan "Running CMake to regenerate build system..." + /usr/bin/cmake -H$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR) +.PHONY : rebuild_cache + +# Special rule for the target rebuild_cache +rebuild_cache/fast: rebuild_cache +.PHONY : rebuild_cache/fast + +# The main all target +all: cmake_check_build_system + cd /home/evilaliv3/Desktop/janus && $(CMAKE_COMMAND) -E cmake_progress_start /home/evilaliv3/Desktop/janus/CMakeFiles /home/evilaliv3/Desktop/janus/src/CMakeFiles/progress.marks + cd /home/evilaliv3/Desktop/janus && $(MAKE) -f CMakeFiles/Makefile2 src/all + $(CMAKE_COMMAND) -E cmake_progress_start /home/evilaliv3/Desktop/janus/CMakeFiles 0 +.PHONY : all + +# The main clean target +clean: + cd /home/evilaliv3/Desktop/janus && $(MAKE) -f CMakeFiles/Makefile2 src/clean +.PHONY : clean + +# The main clean target +clean/fast: clean +.PHONY : clean/fast + +# Prepare targets for installation. +preinstall: all + cd /home/evilaliv3/Desktop/janus && $(MAKE) -f CMakeFiles/Makefile2 src/preinstall +.PHONY : preinstall + +# Prepare targets for installation. +preinstall/fast: + cd /home/evilaliv3/Desktop/janus && $(MAKE) -f CMakeFiles/Makefile2 src/preinstall +.PHONY : preinstall/fast + +# clear depends +depend: + cd /home/evilaliv3/Desktop/janus && $(CMAKE_COMMAND) -H$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR) --check-build-system CMakeFiles/Makefile.cmake 1 +.PHONY : depend + +# Convenience name for target. +src/CMakeFiles/janus.dir/rule: + cd /home/evilaliv3/Desktop/janus && $(MAKE) -f CMakeFiles/Makefile2 src/CMakeFiles/janus.dir/rule +.PHONY : src/CMakeFiles/janus.dir/rule + +# Convenience name for target. +janus: src/CMakeFiles/janus.dir/rule +.PHONY : janus + +# fast build rule for target. +janus/fast: + cd /home/evilaliv3/Desktop/janus && $(MAKE) -f src/CMakeFiles/janus.dir/build.make src/CMakeFiles/janus.dir/build +.PHONY : janus/fast + +# target to build an object file +janus.o: + cd /home/evilaliv3/Desktop/janus && $(MAKE) -f src/CMakeFiles/janus.dir/build.make src/CMakeFiles/janus.dir/janus.o +.PHONY : janus.o + +# target to preprocess a source file +janus.i: + cd /home/evilaliv3/Desktop/janus && $(MAKE) -f src/CMakeFiles/janus.dir/build.make src/CMakeFiles/janus.dir/janus.i +.PHONY : janus.i + +# target to generate assembly for a file +janus.s: + cd /home/evilaliv3/Desktop/janus && $(MAKE) -f src/CMakeFiles/janus.dir/build.make src/CMakeFiles/janus.dir/janus.s +.PHONY : janus.s + +# target to build an object file +main.o: + cd /home/evilaliv3/Desktop/janus && $(MAKE) -f src/CMakeFiles/janus.dir/build.make src/CMakeFiles/janus.dir/main.o +.PHONY : main.o + +# target to preprocess a source file +main.i: + cd /home/evilaliv3/Desktop/janus && $(MAKE) -f src/CMakeFiles/janus.dir/build.make src/CMakeFiles/janus.dir/main.i +.PHONY : main.i + +# target to generate assembly for a file +main.s: + cd /home/evilaliv3/Desktop/janus && $(MAKE) -f src/CMakeFiles/janus.dir/build.make src/CMakeFiles/janus.dir/main.s +.PHONY : main.s + +# target to build an object file +packet_queue.o: + cd /home/evilaliv3/Desktop/janus && $(MAKE) -f src/CMakeFiles/janus.dir/build.make src/CMakeFiles/janus.dir/packet_queue.o +.PHONY : packet_queue.o + +# target to preprocess a source file +packet_queue.i: + cd /home/evilaliv3/Desktop/janus && $(MAKE) -f src/CMakeFiles/janus.dir/build.make src/CMakeFiles/janus.dir/packet_queue.i +.PHONY : packet_queue.i + +# target to generate assembly for a file +packet_queue.s: + cd /home/evilaliv3/Desktop/janus && $(MAKE) -f src/CMakeFiles/janus.dir/build.make src/CMakeFiles/janus.dir/packet_queue.s +.PHONY : packet_queue.s + +# Help Target +help: + @echo "The following are some of the valid targets for this Makefile:" + @echo "... all (the default if no target is provided)" + @echo "... clean" + @echo "... depend" + @echo "... edit_cache" + @echo "... install" + @echo "... install/local" + @echo "... install/strip" + @echo "... janus" + @echo "... list_install_components" + @echo "... rebuild_cache" + @echo "... janus.o" + @echo "... janus.i" + @echo "... janus.s" + @echo "... main.o" + @echo "... main.i" + @echo "... main.s" + @echo "... packet_queue.o" + @echo "... packet_queue.i" + @echo "... packet_queue.s" +.PHONY : help + + + +#============================================================================= +# Special targets to cleanup operation of make. + +# Special rule to run CMake to check the build system integrity. +# No rule that depends on this can have commands that come from listfiles +# because they might be regenerated. +cmake_check_build_system: + cd /home/evilaliv3/Desktop/janus && $(CMAKE_COMMAND) -H$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR) --check-build-system CMakeFiles/Makefile.cmake 0 +.PHONY : cmake_check_build_system + diff --git a/src/janus.c b/src/janus.c new file mode 100644 index 0000000..4627312 --- /dev/null +++ b/src/janus.c @@ -0,0 +1,611 @@ +/* + * Janus, a portable, unified and lightweight interface for mitm + * applications over the routing table. + * + * Copyright (C) 2011 evilaliv3 + * vecna + * + * 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 3 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, see . + */ + +#include "errno.h" +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "janus.h" +#include "packet_queue.h" + +enum mitm_t +{ + NET = 0, TUN = 1, NETMITM = 2, TUNMITM = 3, NETMITMATTACH = 4, TUNMITMATTACH = 5 +}; + +struct janus_config conf; + +static char net_if[CONST_JANUS_BUFSIZE] = {0}; +static char net_ip[CONST_JANUS_BUFSIZE] = {0}; +static char tun_if[CONST_JANUS_BUFSIZE] = {0}; +static char tun_ip[CONST_JANUS_BUFSIZE] = {0}; +static char gw_ip[CONST_JANUS_BUFSIZE] = {0}; +static char gw_mac[CONST_JANUS_BUFSIZE] = {0}; +static uint16_t mtu; + +static struct sockaddr_ll gw_send_ll; + +static int fd[6] = {-1}; +static struct event ev_recv[6]; +static struct event ev_send[6]; +static enum mitm_t handler_index[6]; + +static size_t(*fd_recv[4])(const struct packet *); +static size_t(*fd_send[4])(const struct packet *); +static struct packet *pbuf_recv[4] = {NULL}; +static struct packet *pbuf_send[4] = {NULL}; +static struct packet_queue pqueue[4]; + +static void runtime_exception(const char* format, ...) +{ + char error[CONST_JANUS_BUFSIZE] = {0}; + + va_list arguments; + va_start(arguments, format); + vsnprintf(error, sizeof (error), format, arguments); + va_end(arguments); + + printf("runtime exception: %s\n", error); + exit(1); +} + +static void execOSCmd(char* buf, size_t bufsize, const char* format, ...) +{ + char cmd[CONST_JANUS_BUFSIZE] = {0}; + FILE *stream = NULL; + + va_list arguments; + va_start(arguments, format); + vsnprintf(cmd, sizeof (cmd), format, arguments); + va_end(arguments); + + printf("executing cmd: [%s]\n", cmd); + + stream = popen(cmd, "r"); + if (stream != NULL) + { + if (buf != NULL) + { + if (fgets(buf, bufsize, stream) != NULL) + { + size_t len = strlen(buf); + + if (len && buf[len - 1] == '\n') + buf[len - 1] = '\0'; + } + } + + pclose(stream); + } +} + +static void setfdflag(int fd, long flags) +{ + long tmpflags; + if (((tmpflags = fcntl(fd, F_GETFD)) == -1) || (fcntl(fd, F_SETFD, tmpflags | flags) == -1)) + runtime_exception("unable to set flags %u on fd %u (F_GETFD/F_SETFD): %s", flags, fd); +} + +static struct packet* bufferedRead(enum mitm_t i) +{ + return queue_extract(&pqueue[i]); +} + +static void bufferedWrite(enum mitm_t i, struct packet * pkt) +{ + switch (i) + { + case NET: + i = (fd[NETMITM] == -1) ? TUN : NETMITM; + break; + case TUN: + i = (fd[TUNMITM] == -1) ? NET : TUNMITM; + break; + case NETMITM: + i = TUN; + break; + case TUNMITM: + i = NET; + break; + default: + printf("!? [%s:%u]: %u", __func__, __LINE__, i); + raise(SIGTERM); + return; + } + + queue_insert(&pqueue[i], pkt); + event_add(&ev_send[i], NULL); +} + +static void resetState(uint8_t i) +{ + free_packet(&pbuf_recv[i]); + free_packet(&pbuf_send[i]); +} + +static void mitm_attach(uint8_t i, uint8_t j) +{ + fd[j] = accept(fd[i], NULL, NULL); + if (fd[j] != -1) + { + setfdflag(fd[j], FD_CLOEXEC | O_NONBLOCK); + } + else + { + if ((errno != EAGAIN) && (errno != EWOULDBLOCK)) + event_loopbreak(); + } +} + +static size_t netif_recv(const struct packet* pkt) +{ + struct sockaddr_ll from_ll; + socklen_t fromlen = sizeof (struct sockaddr_ll); + + const size_t ret = recvfrom(fd[NET], pkt->buf, pkt->size, 0x00, (struct sockaddr *) &from_ll, &fromlen); + + if ((ret != -1) && !(memcmp(&gw_send_ll.sll_addr, from_ll.sll_addr, ETH_ALEN))) + { + return ret; + } + else + { + errno = EAGAIN; + return -1; + } +} + +static size_t netif_send(const struct packet* pkt) +{ + return sendto(fd[NET], pkt->buf, pkt->size, 0x00, (struct sockaddr *) &gw_send_ll, sizeof (gw_send_ll)); +} + +static size_t tunif_recv(const struct packet* pkt) +{ + return read(fd[TUN], pkt->buf, pkt->size); +} + +static size_t tunif_send(const struct packet* pkt) +{ + return write(fd[TUN], pkt->buf, pkt->size); +} + +static void recv_wrapper(int f, short event, void *arg) +{ + const enum mitm_t i = *(enum mitm_t *) arg; + + if (pqueue[i == TUN ? NET : TUN].n == PQUEUE_LEN) + event_del(&ev_recv[i]); + + if ((pbuf_recv[i] != NULL) || ((pbuf_recv[i] = new_packet(mtu)) != NULL)) + { + const size_t ret = fd_recv[i](pbuf_recv[i]); + if (ret != -1) + { + struct packet *pbuf_tmp = new_packet(ret); + if (pbuf_tmp != NULL) + { + memcpy(pbuf_tmp->buf, pbuf_recv[i]->buf, ret); + bufferedWrite(i, pbuf_tmp); + } + return; + } + else + { + if ((errno != EAGAIN) && (errno != EWOULDBLOCK)) + event_loopbreak(); + } + } +} + +static void send_wrapper(int f, short event, void *arg) +{ + const enum mitm_t i = *(enum mitm_t *) arg; + + if (pqueue[i == TUN ? NET : TUN].n < (PQUEUE_LEN)) + event_add(&ev_recv[i], NULL); + + if (pbuf_send[i] != NULL || ((pbuf_send[i] = bufferedRead(i)) != NULL)) + { + const int ret = fd_send[i](pbuf_send[i]); + + if (ret == pbuf_send[i]->size) + { + free_packet(&pbuf_send[i]); + + if (pqueue[i].n) + event_add(&ev_send[i], NULL); + + return; + } + else + { + if ((ret != -1) || ((errno != EAGAIN) && (errno != EWOULDBLOCK))) + event_loopbreak(); + else + event_add(&ev_send[i], NULL); + } + } +} + +static void mitm_rs_error_error(enum mitm_t i) +{ + event_del(&ev_recv[i]); + event_del(&ev_send[i]); + + close(fd[i]); + fd[i] = -1; + resetState(i); + queue_clear(&pqueue[i]); + + switch (i) + { + case NETMITM: + event_add(&ev_recv[NETMITMATTACH], NULL); + break; + case TUNMITM: + event_add(&ev_recv[TUNMITMATTACH], NULL); + break; + default: + printf("!? [%s:%u]: %u", __func__, __LINE__, i); + raise(SIGTERM); + + break; + } +} + +static void mitmrecv_wrapper(int f, short event, void *arg) +{ + const enum mitm_t i = *(enum mitm_t *) arg; + + int ret; + + if (pbuf_recv[i] == NULL) + { + uint16_t size; + ret = recv(fd[i], &size, sizeof (size), MSG_WAITALL); + if (ret == (sizeof (size))) + { + size = ntohs(size); + if (size) + pbuf_recv[i] = new_packet(size); + + return; + } + } + else + { + ret = recv(fd[i], pbuf_recv[i]->buf, pbuf_recv[i]->size, MSG_WAITALL); + if (ret == pbuf_recv[i]->size) + { + bufferedWrite(i, pbuf_recv[i]); + pbuf_recv[i] = NULL; + return; + } + } + + if ((ret != -1) || ((errno != EAGAIN) && (errno != EWOULDBLOCK))) + mitm_rs_error_error(i); +} + +static void mitmsend_wrapper(int f, short event, void *arg) +{ + const enum mitm_t i = *(enum mitm_t *) arg; + + int ret = 0; + + if ((pbuf_send[i] != NULL) || ((pbuf_send[i] = bufferedRead(i)) != NULL)) + { + ret = send(fd[i], pbuf_send[i]->packed_buf, pbuf_send[i]->packed_size, 0); + if (ret == pbuf_send[i]->packed_size) + { + free_packet(&pbuf_send[i]); + + if (pqueue[i].n) + event_add(&ev_send[i], NULL); + + return; + } + + if ((ret != -1) || ((errno != EAGAIN) && (errno != EWOULDBLOCK))) + mitm_rs_error_error(i); + + else + event_add(&ev_send[i], NULL); + } +} + +static void mitmattach_wrapper(int f, short event, void *arg) +{ + + const enum mitm_t i = *(enum mitm_t *) arg; + + const int j = (i == NETMITMATTACH) ? NETMITM : TUNMITM; + + mitm_attach(i, j); + + event_set(&ev_recv[j], fd[j], EV_READ | EV_PERSIST, mitmrecv_wrapper, &handler_index[j]); + event_set(&ev_send[j], fd[j], EV_WRITE, mitmsend_wrapper, &handler_index[j]); + + event_add(&ev_recv[j], NULL); +} + +static uint8_t setupNET(void) +{ + int net = -1; + + struct ifreq tmpifr; + uint32_t mac[6]; + int tmpfd; + uint8_t i; + + if ((net = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) == -1) + runtime_exception("unable to open datalink layer for net interface"); + + setfdflag(net, FD_CLOEXEC | O_NONBLOCK); + + memset(&tmpifr, 0x00, sizeof (tmpifr)); + strncpy(tmpifr.ifr_name, net_if, sizeof (tmpifr.ifr_name)); + if (ioctl(net, SIOCGIFINDEX, &tmpifr) == -1) + runtime_exception("unable to execute ioctl(SIOCGIFINDEX) on interface %s", net_if); + + memset(&gw_send_ll, 0x00, sizeof (gw_send_ll)); + gw_send_ll.sll_family = PF_PACKET; + gw_send_ll.sll_protocol = htons(ETH_P_IP); + gw_send_ll.sll_ifindex = tmpifr.ifr_ifindex; + gw_send_ll.sll_hatype = 0; + gw_send_ll.sll_pkttype = PACKET_HOST; + gw_send_ll.sll_halen = ETH_ALEN; + + sscanf(gw_mac, "%2x:%2x:%2x:%2x:%2x:%2x", &mac[0], &mac[1], &mac[2], &mac[3], &mac[4], &mac[5]); + for (i = 0; i < ETH_ALEN; ++i) + gw_send_ll.sll_addr[i] = mac[i]; + + if (bind(net, (struct sockaddr *) &gw_send_ll, sizeof (gw_send_ll)) == -1) + runtime_exception("unable to bind datalink layer on interface %s", net_if); + + tmpfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP); + + if (ioctl(tmpfd, SIOCGIFMTU, &tmpifr) == -1) + runtime_exception("unable to get MTU (SIOCGIFMTU) on interface: %s", net_if); + mtu = tmpifr.ifr_mtu; + + close(tmpfd); + + return net; +} + +static uint8_t setupTUN(void) +{ + int tun = -1; + + const char *tundev = "/dev/net/tun"; + + struct ifreq tmpifr; + int tmpfd; + int i; + + if ((tun = open(tundev, O_RDWR)) == -1) + runtime_exception("unable to open %s: check the kernel module", tundev); + + setfdflag(tun, FD_CLOEXEC | O_NONBLOCK); + + memset(&tmpifr, 0x00, sizeof (tmpifr)); + tmpifr.ifr_flags = IFF_TUN | IFF_NO_PI; + + for (i = 0; i < 64; i++) + { + snprintf(tmpifr.ifr_name, sizeof (tmpifr.ifr_name), "%s%u", CONST_JANUS_IFNAME, i); + if (!ioctl(tun, TUNSETIFF, &tmpifr)) + break; + + if (i == 63) + runtime_exception("unable to set tun flags (TUNSETIFF)"); + } + + snprintf(tun_if, sizeof (tun_if), tmpifr.ifr_name); + + snprintf(tun_ip, sizeof (tun_ip), "%s%u", CONST_JANUS_FAKEGW_IP, i + 1); + + tmpfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP); + + if (ioctl(tmpfd, SIOCGIFFLAGS, &tmpifr) == -1) + runtime_exception("unable to get tun flags (SIOCGIFFLAGS)"); + + tmpifr.ifr_flags |= IFF_UP | IFF_RUNNING | IFF_POINTOPOINT; + if (ioctl(tmpfd, SIOCSIFFLAGS, &tmpifr) == -1) + runtime_exception("unable to get tun flags (SIOCSIFFLAGS)"); + + tmpifr.ifr_mtu = mtu; + if (ioctl(tmpfd, SIOCSIFMTU, &tmpifr) == -1) + runtime_exception("unable to set tun mtu (SIOCSIFMTU)"); + + ((struct sockaddr_in *) &tmpifr.ifr_addr)->sin_family = AF_INET; + ((struct sockaddr_in *) &tmpifr.ifr_addr)->sin_addr.s_addr = inet_addr(net_ip); + if (ioctl(tmpfd, SIOCSIFADDR, &tmpifr) == -1) + runtime_exception("unable to set tun local addr to %s", net_ip); + + ((struct sockaddr_in *) &tmpifr.ifr_addr)->sin_family = AF_INET; + ((struct sockaddr_in *) &tmpifr.ifr_addr)->sin_addr.s_addr = inet_addr(tun_ip); + if (ioctl(tmpfd, SIOCSIFDSTADDR, &tmpifr) == -1) + runtime_exception("unable to set tun point-to-point dest addr to %s", tun_ip); + + close(tmpfd); + + return tun; +} + +static int setupMitmAttach(uint16_t port) +{ + int fd = -1; + int on = 1; + struct sockaddr_in ssin; + + if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) + runtime_exception("unable to open socket"); + + setfdflag(fd, FD_CLOEXEC); + + setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof (int)); + + memset(&ssin, 0, sizeof (struct sockaddr_in)); + ssin.sin_family = AF_INET; + ssin.sin_port = htons(port); + if (!inet_aton(conf.listen_ip, (struct in_addr *) &ssin.sin_addr.s_addr)) + runtime_exception("invalid listening address provided"); + + if (bind(fd, (struct sockaddr *) &ssin, sizeof (struct sockaddr_in)) < 0) + runtime_exception("unable to bind"); + + if (listen(fd, 0) < 0) + runtime_exception("unable to listen"); + + return fd; +} + +uint8_t JANUS_Bootstrap(void) +{ + uint8_t i; + + execOSCmd(net_if, sizeof (net_if), "route -n | sed -n 's/^\\(%s\\).* \\([0-9.]\\{7,15\\}\\) .*\\(%s\\).*UG.* \\(.*\\)$/\\4/p'", conf.netip, conf.netmask); + if (!strlen(net_if)) + { + runtime_exception("unable to detect default gateway interface"); + return -1; + } + + printf("detected default gateway interface: [%s]\n", net_if); + + execOSCmd(net_ip, sizeof (net_ip), "ifconfig %s | sed -n 's/.*inet addr:\\([0-9.]\\+\\) .*$/\\1/p'", net_if); + if (!strlen(net_ip)) + { + runtime_exception("unable to detect ", net_if, " ip address"); + return -1; + } + + printf("detected local ip address on interface %s: [%s]\n", net_if, net_ip); + + execOSCmd(gw_ip, sizeof (gw_ip), "route -n | sed -n 's/^\\(%s\\).* \\([0-9.]\\{7,15\\}\\) .*\\(%s\\).*UG.* %s$/\\2/p'", conf.netip, conf.netmask, net_if); + if (!strlen(gw_ip)) + { + runtime_exception("unable to detect default gateway ip address"); + return -1; + } + + printf("detected default gateway ip address: [%s]\n", gw_ip); + + execOSCmd(gw_mac, sizeof (gw_mac), "arp -ni %s %s | sed -n 's/^.*\\([a-f0-9:]\\{17,17\\}\\).*$/\\1/p'", net_if, gw_ip); + if (!strlen(gw_mac)) + { + runtime_exception("unable to detect default gateway mac address"); + return -1; + } + + printf("detected default gateway mac address: [%s]\n", gw_mac); + + fd[NET] = setupNET(); + fd[TUN] = setupTUN(); + fd[NETMITM] = -1; + fd[TUNMITM] = -1; + fd[NETMITMATTACH] = setupMitmAttach(conf.listen_port_in); + fd[TUNMITMATTACH] = setupMitmAttach(conf.listen_port_out); + + for (i = 0; i < 6; ++i) + { + if (i < 4) + { + pbuf_recv[i] = NULL; + pbuf_send[i] = NULL; + queue_init(&pqueue[i]); + } + + handler_index[i] = (enum mitm_t)i; + } + + fd_recv[NET] = netif_recv; + fd_send[NET] = netif_send; + + fd_recv[TUN] = tunif_recv; + fd_send[TUN] = tunif_send; + + execOSCmd(NULL, 0, "route del -net %s netmask %s gw %s dev %s", conf.netip, conf.netmask, gw_ip, net_if); + execOSCmd(NULL, 0, "route add -net %s netmask %s gw %s dev %s", conf.netip, conf.netmask, tun_ip, tun_if); + execOSCmd(NULL, 0, "iptables -A INPUT -m mac --mac-source %s -j DROP", gw_mac); + + return 0; +} + +uint8_t JANUS_Shutdown(void) +{ + uint8_t i; + for (i = 0; i < 6; ++i) + { + if (i < 4) + { + resetState(i); + queue_clear(&pqueue[i]); + } + + if (fd[i] != -1) + close(fd[i]); + } + + execOSCmd(NULL, 0, "route del -net %s netmask %s gw %s dev %s", conf.netip, conf.netmask, tun_ip, tun_if); + execOSCmd(NULL, 0, "route add -net %s netmask %s gw %s dev %s", conf.netip, conf.netmask, gw_ip, net_if); + execOSCmd(NULL, 0, "iptables -D INPUT -m mac --mac-source %s -j DROP", gw_mac); + + return 0; +} + +void JANUS_EventLoop(void) +{ + event_init(); + + event_set(&ev_send[NET], fd[NET], EV_WRITE, send_wrapper, &handler_index[NET]); + event_set(&ev_send[TUN], fd[TUN], EV_WRITE, send_wrapper, &handler_index[TUN]); + event_set(&ev_recv[NET], fd[NET], EV_READ | EV_PERSIST, recv_wrapper, &handler_index[NET]); + event_set(&ev_recv[TUN], fd[TUN], EV_READ | EV_PERSIST, recv_wrapper, &handler_index[TUN]); + event_set(&ev_recv[NETMITMATTACH], fd[NETMITMATTACH], EV_READ, mitmattach_wrapper, &handler_index[NETMITMATTACH]); + event_set(&ev_recv[TUNMITMATTACH], fd[TUNMITMATTACH], EV_READ, mitmattach_wrapper, &handler_index[TUNMITMATTACH]); + + event_add(&ev_recv[NET], NULL); + event_add(&ev_recv[TUN], NULL); + event_add(&ev_recv[NETMITMATTACH], NULL); + event_add(&ev_recv[TUNMITMATTACH], NULL); + + event_dispatch(); +} diff --git a/src/janus.h b/src/janus.h new file mode 100644 index 0000000..3f7e141 --- /dev/null +++ b/src/janus.h @@ -0,0 +1,54 @@ +/* + * Janus, a portable, unified and lightweight interface for mitm + * applications over the routing table. + * + * Copyright (C) 2011 evilaliv3 + * vecna + * + * 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 3 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, see . + */ + +#ifndef JANUS_H +#define JANUS_H + +#define CONST_JANUS_VERSION "0.1" +#define CONST_JANUS_IFNAME "janus" +#define CONST_JANUS_FAKEGW_IP "212.77.1." +#define CONST_JANUS_NETIP "0.0.0.0" +#define CONST_JANUS_NETMASK "0.0.0.0" +#define CONST_JANUS_LISTEN_IP "127.0.0.1" +#define CONST_JANUS_LISTEN_PORT_IN 30201 +#define CONST_JANUS_LISTEN_PORT_OUT 10203 +#define CONST_JANUS_BUFSIZE 4096 +#define PQUEUE_LEN 6400 +#define REGEXP_IPV4 "([0-9]{1,3})\\.([0-9]{1,3})\\.([0-9]{1,3})\\.([0-9]{1,3})" +#define REGEXP_HOST "^"REGEXP_IPV4"$" +#define REGEXP_NET "^"REGEXP_IPV4"/"REGEXP_IPV4"$" + +struct janus_config +{ + char netip [CONST_JANUS_BUFSIZE]; + char netmask [CONST_JANUS_BUFSIZE]; + char target_ip [CONST_JANUS_BUFSIZE]; + char target_mask [CONST_JANUS_BUFSIZE]; + char listen_ip [CONST_JANUS_BUFSIZE]; + uint16_t listen_port_in; + uint16_t listen_port_out; +}; + +uint8_t JANUS_Bootstrap(void); +uint8_t JANUS_Shutdown(void); +void JANUS_EventLoop(void); + +#endif /* JANUS_H */ \ No newline at end of file diff --git a/src/main.c b/src/main.c new file mode 100644 index 0000000..edbf07c --- /dev/null +++ b/src/main.c @@ -0,0 +1,248 @@ +/* + * Janus, a portable, unified and lightweight interface for mitm + * applications over the routing table. + * + * Copyright (C) 2011 evilaliv3 + * vecna + * + * 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 3 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, see . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "janus.h" + +extern struct janus_config conf; + +uint8_t main_alive; + +static void janus_help(const char *pname) +{ +#define JANUS_HELP_FORMAT \ + "Usage: Janus [OPTION]... :\n"\ + " --net\t\t\t\tset the gateway object of the mitm\n"\ + " --listen-ip\t\t\t\tset the listen ip address\n"\ + " --listen-port-in\t\t\tset the listen port for incoming traffic\n"\ + " --listen-port-out\t\t\tset the listen port for outgoing traffic\n"\ + " --foreground\t\t\t\trun Janus in foreground\n"\ + " --version\t\t\t\tshow Janus version\n"\ + " --help\t\t\t\t\tshow this help\n\n"\ + "http://www.github.com/evilaliv3/janus\n" + + printf(JANUS_HELP_FORMAT); +} + +static void janus_version(const char *pname) +{ + printf("Janus 1.0\n"); +} + +void handler_termination(int signum) +{ + if (signum == SIGINT || signum == SIGSEGV || signum == SIGTERM) + main_alive = 0; + + event_loopbreak(); +} + +static void sigtrapSetup(void(sigtrap_function) (int)) +{ + sigset_t sig_nset; + struct sigaction action; + + sigemptyset(&sig_nset); + + sigaddset(&sig_nset, SIGINT); + sigaddset(&sig_nset, SIGABRT); + sigaddset(&sig_nset, SIGPIPE); + sigaddset(&sig_nset, SIGSEGV); + sigaddset(&sig_nset, SIGTERM); + sigaddset(&sig_nset, SIGQUIT); + + memset(&action, 0, sizeof (action)); + action.sa_handler = sigtrap_function; + action.sa_mask = sig_nset; + + sigaction(SIGINT, &action, NULL); + sigaction(SIGABRT, &action, NULL); + sigaction(SIGPIPE, &action, NULL); + sigaction(SIGSEGV, &action, NULL); + sigaction(SIGTERM, &action, NULL); + sigaction(SIGQUIT, &action, NULL); + sigaction(SIGUSR1, &action, NULL); + sigaction(SIGUSR2, &action, NULL); +} + +uint8_t validate(const char *string, char *pattern) +{ + regex_t re; + + if (regcomp(&re, pattern, REG_EXTENDED | REG_NOSUB) == 0) + { + int status = regexec(&re, string, (size_t) 0, NULL, 0); + regfree(&re); + + return (status != 0) ? 0 : 1; + } + + return 0; +} + +int main(int argc, char **argv) +{ + uint8_t foreground = 0; + + int charopt; + int port; + int i; + + struct option janus_options[] = { + { "net", required_argument, NULL, 'n'}, + { "listen-port-in", required_argument, NULL, 'i'}, + { "listen-ip", required_argument, NULL, 'l'}, + { "listen-port-in", required_argument, NULL, 'i'}, + { "listen-port-out", required_argument, NULL, 'o'}, + { "foreground", no_argument, NULL, 'f'}, + { "version", no_argument, NULL, 'v'}, + { "help", no_argument, NULL, 'h'}, + { NULL, 0, NULL, 0} + }; + + snprintf(conf.netip, sizeof (conf.netip), "%s", CONST_JANUS_NETIP); + snprintf(conf.netmask, sizeof (conf.netmask), "%s", CONST_JANUS_NETMASK); + snprintf(conf.listen_ip, sizeof (conf.listen_ip), "%s", CONST_JANUS_LISTEN_IP); + conf.listen_port_in = CONST_JANUS_LISTEN_PORT_IN; + conf.listen_port_out = CONST_JANUS_LISTEN_PORT_OUT; + + while ((charopt = getopt_long(argc, argv, "n:l:i:o:vh", janus_options, NULL)) != -1) + { + switch (charopt) + { + case 'n': + if (validate(optarg, REGEXP_NET)) + { + for (i = 0; i < strlen(optarg); i++) + { + if (optarg[i] == '/') + break; + } + + strncpy(conf.netip, optarg, i); + strncpy(conf.netmask, &optarg[i + 1], strlen(optarg) - i); + } + else + { + printf("invalid net specified for net param\n"); + exit(1); + } + break; + case 'l': + if (validate(optarg, REGEXP_HOST)) + snprintf(conf.listen_ip, sizeof (conf.listen_ip), "%s", optarg); + else + { + printf("invalid ip specified for listen-ip param\n"); + exit(1); + } + break; + case 'i': + port = atoi(optarg); + if (port >= 0 && port <= 65535) + conf.listen_port_in = (uint16_t) port; + else + { + printf("invalid port specified for listen_port_in param\n"); + exit(1); + } + break; + case 'o': + port = atoi(optarg); + if (port >= 0 && port <= 65535) + conf.listen_port_out = (uint16_t) port; + else + { + printf("invalid port specified for listen_port_out param\n"); + exit(1); + } + break; + case 'f': + foreground = 1; + break; + case 'v': + janus_version(argv[0]); + return 0; + case 'h': + janus_help(argv[0]); + return 0; + default: + janus_help(argv[0]); + return -1; + + argc -= optind; + argv += optind; + } + } + + if (getuid() || geteuid()) + { + printf("root privileges required\n"); + exit(1); + } + + if (!foreground) + { + int i; + + printf("Janus is now going in foreground, use SIGTERM to stop it.\n"); + + if (fork()) + exit(0); + + setsid(); + + for (i = getdtablesize(); i >= 0; --i) + close(i); + + i = open("/dev/null", O_RDWR); /* stdin */ + dup(i); /* stdout */ + dup(i); /* stderr */ + } + + sigtrapSetup(handler_termination); + + main_alive = 1; + + while (main_alive) + { + JANUS_Bootstrap(); + + JANUS_EventLoop(); + + JANUS_Shutdown(); + } + + exit(0); +} diff --git a/src/packet_queue.c b/src/packet_queue.c new file mode 100644 index 0000000..7b98461 --- /dev/null +++ b/src/packet_queue.c @@ -0,0 +1,105 @@ +/* + * Janus, a portable, unified and lightweight interface for mitm + * applications over the routing table. + * + * Copyright (C) 2011 evilaliv3 + * vecna + * + * 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 3 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, see . + */ + +#include +#include +#include + +#include + +#include "packet_queue.h" + +struct packet* new_packet(uint32_t size) +{ + const uint32_t realsize = (sizeof (struct packet)) + (2 * (sizeof (uint16_t))) + size; + + struct packet * const ret = (struct packet *) malloc(realsize); + + if (ret != NULL) + { + ret->size = size; + ret->buf = (uint8_t *) ret + (sizeof (struct packet)) + (sizeof (uint16_t)); + + ret->packed_size = size + (sizeof (uint16_t)); + ret->packed_buf = (uint8_t *) ret + (sizeof (struct packet)); + *(uint16_t *) ret->packed_buf = htons(size); + } + + return ret; +} + +void free_packet(struct packet** pkt_p) +{ + if (*pkt_p != NULL) + { + free(*pkt_p); + *pkt_p = NULL; + } +} + +void queue_init(struct packet_queue* q) +{ + q->n = 0; + q->head = NULL; + q->tail = NULL; +} + +void queue_insert(struct packet_queue *q, struct packet *p) +{ + p->next = NULL; + + if (q->n == 0) + { + q->head = p; + q->tail = p; + } + else + { + + q->tail->next = p; + q->tail = p; + } + + q->n++; +} + +struct packet* queue_extract(struct packet_queue *q) +{ + struct packet * const ret = q->head; + + if (ret != NULL) + { + q->head = q->head->next; + q->n--; + + if (q->n == 0) + q->tail = NULL; + } + + return ret; +} + +void queue_clear(struct packet_queue *q) +{ + struct packet *tmp; + while ((tmp = queue_extract(q)) != NULL) + free(tmp); +} \ No newline at end of file diff --git a/src/packet_queue.h b/src/packet_queue.h new file mode 100644 index 0000000..bd3ffbb --- /dev/null +++ b/src/packet_queue.h @@ -0,0 +1,52 @@ +/* + * Janus, a portable, unified and lightweight interface for mitm + * applications over the routing table. + * + * Copyright (C) 2011 evilaliv3 + * vecna + * + * 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 3 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, see . + */ + +#ifndef J_PACKET_QUEUE_H +#define J_PACKET_QUEUE_H + +#include + +struct packet +{ + struct packet *next; + + uint16_t size; + uint8_t *buf; + + uint16_t packed_size; + uint8_t *packed_buf; +}; + +struct packet_queue +{ + size_t n; + struct packet *head; + struct packet *tail; +}; + +struct packet* new_packet(uint32_t size); +void free_packet(struct packet** pkt_p); +void queue_init(struct packet_queue *q); +void queue_insert(struct packet_queue *q, struct packet *p); +struct packet* queue_extract(struct packet_queue *q); +void queue_clear(struct packet_queue *q); + +#endif /* J_PACKET_QUEUE_H */ \ No newline at end of file