# NEWS ## libmodbus 3.1.10 (2022-12-07) Urgent release to fix a regression. - Fix baud rate handling with RTU under Linux - Fix modbus_disable_quirks signature ## libmodbus 3.1.9 (2022-12-03) - Remove Travis CI - Move content about migration to libmodbus.org - Avoid negative value in FD_SET call - Test socket against positive value instead of -1 - Improvements to autotools by @ndim - Fix doc links by @jordanjohnson56 - Test the protocol id for 0 by @metapsychologe - Fix double negative in tests - New quirks handler (closes #38 #533) - Fix bitwise OR in documentation - Improve doc about slave ID in RTU - Add .clang-format and format code (closes #394) - Remove constraints on baud rate values - Accept IP or device in arg of unit test progs - Avoid compilation issue with VS2022 with strdup - Display created files in configure.js - Use strcpy_s under Windows - Replace inet_addr by inet_pton calls - Replace inet_ntoa by inet_ptop - Update configure.ac/config.h.win32 for new inet functions - Instructions to build libmodbus in a VS project - Fix connection check for Windows RTU (closes #660, #662) - Add CIFuzz Github action - Convert a few int to unsigned int (#402) ## libmodbus 3.1.8 (2022-08-17) - Major rewrite of documentation with Material for mkdocs - Reduce memory use of TCP PI backend (closes #621) - Fixed MODBUS_ERROR_RECOVERY_LINK not working on Windows (@embeddedmz) - Replace Travis CI by GitHub CI - Fix linker error for Windows (VCLinkerTool) - Address check in single register / coil responses added (#463) - Swap CRC bytes in request data but not at CRC computing (#397) - Fix float endianness issue on big endian architecture - Fix comment about EMBUNKEXC (closes #566) - Fix network library detection on Haiku - Fix typos (closes #620) ## libmodbus 3.1.7 (2022-01-09) - modbus_reply: fix copy & paste error in sanity check (fixes #614) - Add SECURITY.md (closes #613) - Fix typo in comment (closes #588) - Replace obsolete AC_PROG_CC_STDC by AC_PROG_CC - Fix position of CC flags in documentation (closes #599) - Remove duplicate ';' (closes #602) - Add the baud rate of 256k for Windows (closes #603) - cosmetic changes in man page standardizing itemization - Fix many typos - Replace .dir-locals.el (Emacs) by .editorconfig - Include the test LICENSE in tarball - Install the NEWS and AUTHORS files - Update README.md - docs: fix simple typo, reponse -> response - Add modbus\_[get|set]\_indication_timeout to doc build - Fix warning issues - Move malloc before starting unit tests - Fixed MODBUS*GET*\* macros in case of negative values - SPDX: change LGPL-2.1+ to LGPL-2.1-or-later Thank you to @yegorich, @i-ky, @jobol, @timgates42, @anton-bondarev, @richardash1981, @stefannilsson, @Zugschlus, @qqq89513 and @mhei. ## libmodbus 3.1.6 (2019-07-31) - Fix awful typo in fix for VD-1301 vulnerability. Thank you @karlp. ## libmodbus 3.1.5 (2019-07-29) - Fix URL - Add appveyor.com config - Update libmodbus.txt - Change arg value from int to const uint16_t in modbus_write_register - Mark raw_req argument as const in modbus_send_raw_request (closes #479) - Add unit tests for VD-1301 and VD-1302 vulnerabilities - Fix VD-1301 and VD-1302 vulnerabilities - Create CODE_OF_CONDUCT.md - modbus_mapping_t is now a named typedef (to allow forward declaration) - Rename type as flags for consistency between functions - Add missing SOCK_CLOEXEC flag on socket creation - Remove wrong and harmful checks in configure.ac - Oops fix OR on RS485 settings (1c5d969) - Only set SER_RS485_ENABLED bit of existing RS485 settings - Add .vscode/ to .gitignore - Fix wrong function name - Remove a duplicated semi-colon - Fix a small typo in test message - Fix modbus_reply for TCP when unit id == 0 (fixes #376) - New functions to define the indication timeout (#95) - Remove CYGWIN condition to provide bswap16 fallback (#383) - typo fix - Use builtin bswap16 of gcc 4.8 (#377) - Handle out-of-memory conditions more gracefully - [doc] Add entry points for accept/listen in libmodbus index - Fix typo - Refine issue template for Github - Move WINVER definition before other includes (#350) - Add new function modbus_get_slave() - Fix LIBMODBUS_VERSION_HEX encoding (closes #345) - tcp_modbus_accept mustn't close socket on error (closes #333) ## libmodbus 3.1.4 (2016-05-28) - C_PROG_RANLIB is rendered obsolete by LT_INIT - Improve ifdef around bswap_16 for **CYGWIN** - Improve Cygwin support. Thanks to StalderT. - Another round of DRY in modbus_reply() - Rename raw_rep to raw_rsp in unit-test-client - Fix wrong function name in debug message - Fix handling of invalid function code (closes #315) - Add debug message on unknown function and new unit test - DRY in modbus_reply by improving response_exception() - Fix typo in 3053bd0adb - CID 69145 - Argument cannot be negative in unit-test-server - CID 69142 - Unchecked return value in unit-test-server - Fix CID 69140 - Bad bit shift operation (coverity) in tests - Rewrite and rename README as README.md in tests/ - Github's contributing and issue template files - Fix small leak (64 bytes in TCP) in unit-test-client - Add unit-tests.sh to tarball - Add ./configure.scan to .gitignore - Move setting of option inside the relevant conditional group - Add links to new modbus*\*\_float*\* functions in index - Slight change to modbus_report_slave_id doc. ## libmodbus 3.1.3 (2016-05-11) - New bswap macros for Max OSX by Jakob Bysewski. - Fix "wildcard address" in TCP IPv6 by Shoichi Sakane. - Introduce offsets in modbus mappings with modbus_mapping_new_start_address. Thanks to Michael Heimpold and Stéphane Raimbault. - Fix address range in random-test-client. Thanks to Martin Galvan. - Add an option to disable tests compilation by Yegor Yefremov. - Define MSG_DONTWAIT to MSG_NONBLOCK on AIX (#294). Thanks to Fabrice Cantos. - Fix building when byteswap.h is not defined by Tomasz Mon. - Add some more macros for data manipulation and documentation. - Remove duplicate install of modbus.h (closes #290). Thanks to Daniel Sutcliffe. - Move MIGRATION and README.md to dist_doc_DATA target. - Change order of few functions in modbus RTU code. - Add entries for modbus*rtu*[get|set]\_delay in documentation index. - Implemented runtime configurable RTS delay by Jimmy Bergström. - Add an entry in libmodbus index page for modbus_rtu_set_custom_rts. - Add support for user defined RTS toggle function by Jimmy Bergström. - Added ILLEGAL_DATA_ADDRESS tests for modbus_write_register[|s]. Thanks to Andrey Skvortsov. - Update documentation of modbus_rtu_set_rts - Fix rts signal switch time by Hiromasa Ihara. - Improve new_rtu and set_slave documentation (related to #276). - Fix late check of ctx in modbus_reply[|_exception] (closes #269). - Wait the server for 1 second before running tests (help Travis). - A libmodbus context isn't thread safe and won't be (closes #246). - Fix buffer overflow in modbus_mask_write_register (#265). - Minor adjustments to README about AsciiDoc. - Export MODBUS_MAX_ADU_LENGTH and documentation (ref #241). - Explicit check against Modbus broadcast address. - Do not reply on broadcast requests (fixes #153). Thanks to Michael. - Add Travis support. - Run unit tests with standard: make check (closes #205, closes #238). This patch has been developed by Andrey Skvortsov, Michael Heimpold and Stéphane Raimbault. - modbus_send_raw_request: limit request length (fixes #207). Thanks to Hanno Neuer for spotting this security flaw. - Add new contributors to AUTHORS - Introduce SPDX license identifiers. Thanks to Michael Heimpold. ## libmodbus 3.1.2 (2015-02-13) If you still want to listen any addresses in your TCP IPv4 server, you must now set the IP address to NULL in modbus_new_tcp before listening. Now, modbus_tcp_listen only listen the IP address set in the Modbus context (see documentation). This release introduces API changes on modbus_get_byte_timeout, modbus_get_response_timeout, modbus_set_byte_timeout, modbus_set_response_timeout to ease writing of language bindings. - Rewrite documentation building system - Fix timeouts in unit tests - Don't flush on illegal address errors in single write functions - Fix compilation on compilers not supporting c99 mode. Thanks to Michael Heimpold. - Update license for the tests in Debian packaging (#221) - Move check of device earlier to avoid a free call - Unit test for baud rate check and error message. - Fix crash modbus_new_rtu when baud is 0. Thank you to Daniel Schürmann. - Removed function prototype without implementation Thank you Andrej Skvortzov. - Switch test programs to a BSD license - Fix remote buffer overflow vulnerability on write requests - Avoid twice connect() in source code (closes #194) - Fix compilation with MinGW (GCC 4.8.1) under Win7 (closes #163) Thank you MarjanTomas and SwissKnife. - Fix TCP IPv4 modbus_connect() on win32 (closes #100 and #165) Thank you Petr Gladkiy and Marjan Tomas. - Fix 24a05ebd3c0 - win32: init of modbus_tcp_pi_listen (#187) - INADDR\_\* macros are defined in host byte order - Filter of IP addresses in IPv4 server (closes #190) - Allow to listen any hosts in IPv6 (closes #32) - Define and public export of MODBUS_MAX_PDU_LENGTH (closes #167) - Truncate data from response in report_slave_id to new max arg (closes #167) - Fix response timeout modification on connect (closes #80) - New API to set/get response and byte timeouts. New unit tests and updated documentation. - Export Modbus function codes supported by libmodbus - Fix bandwidth-server-one (closes #152) - Check debug flag in RTU code - Remove warnings caused by shadowed 'index' variable. Thanks to Åke Forslund. - Use accept4 in TCP PI if available - Add documentation for tcp[_pi]\_accept (closes #31) - Fix mistake in modbus_tcp_listen documentation - Add documentation for modbus_tcp_pi_listen - Fix for MinGW and Windows (#144, #169, #175, #180, #181, #187) Thanks to Marjan Tomas. - Many other fixes (#134, #157, #158, #183, #184) and improvements. ## libmodbus 3.1.1 (2013-10-06) More robust to exploits, more compliant and better handling of connect/close sequences. Windows support still broken. - New unit tests - Fix remote buffer overflow vulnerability (closes #25, #105) - Explain how to define response timeouts when many RTU slaves - Fix receiving of incorrect queries in write_single and mask_write_register Thanks to James Nutaro. - Check return value of autoreconf. Thanks to Lauri Nurmi - Constant for broacast and test ordering - Fix the fix of device string check - Various changes to try to improve *broken* Windows support - Try to fix MinGW compilation - Portable use of bswap_32 - Improve support of MacOS X - Fix socket value on init/close - Returns -1 on invalid mode in modbus_rtu_set_rts - Protect all public functions against invalid context - Sleep for delay of response timeout before reconnect (closes #77). Thanks to Karl Palsson. - Baud rate until 4,000,000 (POSIX), 1,000,000 (Windows) (closes #93) - New modbus_get|set_float_dcba to get|set float in inversed byte order - Remove unsupported -Wtype-limits for GCC < 4.3.5 (closes #109) - Enable out-of-source build. Thanks to Yegor Yefremov. - Fix alignment problem on ARMv5 platform - Improvement to Debian package. Thanks to Alexander Klauer. - Improve support of VS 2005. Thanks to Petr Gladkiy. - Add documentation for modbus_mask_write_register (closes #91). Thanks to Martijn de Gouw. - Avoid C99 declaration in win32 section code (closes #92). Thanks to oldfaber and endrelovas. - Add a windows scripting host configure file. Thanks to oldfaber and Stéphane Raimbault. - Fix typo in modbus_strerror documentation. Thanks to Mirko Rajkovaca. - Rename reserved C++ keywords of modbus_mask_write_register. Thanks Tobias Doerffel. - Another quick workaround for deficient OS (closes #63) - Add support for Mask Write Register - Fix missing close on socket in random-test-server. Thanks to Damian Zieliński. - Use nonblocking sockets on Win32 and OS X/iOS too. Thanks to Julian Raschke. - Fix all compilations warnings spotted by new compilation flags - Major update of build system - Calculate RTS activation time by send length - Dynamic memory allocation of device name (closes #11) - Add unit tests for modbus_mapping_new - Add Visual Studio 2008 project files by oldfaber - Fix missing argument in synopsis section of modbus_rtu_set_serial_mode - Fix wrong constant names to create version number - More compilation fixes for Windows by oldfaber. - Fix wrong constant names to create version number. Thanks to Denis Davydov. ## libmodbus 3.1.0 (2012-06-22) Major changes to handle many slaves in RTU mode, non blocking connections and RTS flow control. - Fixes for Microsoft Visual C++ compiler - Fixes for Windows. Thanks to oldfaber - Return value of \_modbus_tcp_pi_connect() on failure (closes #61) - Avoid ioctl call on non-RS485 ports. Thanks to Michael Haberler - Display node and service in PI and port in IPv4 at connection - Return -1 on getaddrinfo error and print error in debug mode - More robust way to establish the connection in non blocking mode - TCP - Socket in non blocking mode by default. Thanks to Thomas Stalder - Apply CLOEXEC flag for TCP protocol independent too (IPv6) - New RTU receive() to ignore confirmation from other slaves (closes #18) - Move RTU filtering in CRC check to avoid useless call to modbus_reply - Unique transaction identifier by TCP connection - Use accept4 with SOCK_CLOEXEC when available (Linux) - Open fd and socket with the CLOEXEC flag when available - Exception response on report slave ID wasn't detected (closes #27) - Provides a way to disable the byte timeout (Alex Stapleton) - Added slave ID check for response messages (Alex Stapleton) - RTS flow control with modbus_rtu_set_rts and modbus_rtu_get_rts functions by Torello Querci and Stéphane Raimbault. ## libmodbus 3.0.8 (2019-07-31) - Fix awful typo in fix for VD-1301 vulnerability. Thank you @karlp. ## libmodbus 3.0.7 (2019-07-29) - Backport fixes for VD-1301 and VD-1302 vulnerabilities - Move WINVER definition before other includes (closes #350) - Replace signed int by unsigned ## libmodbus 3.0.6 (2014-02-21) - Backport fix remote buffer overflow vulnerability on write requests - Replace deprecated INCLUDES by AM_CPPFLAGS ## libmodbus 3.0.5 (2013-10-06) - Fix remote buffer overflow vulnerability - Fix receiving of incorrect queries in write_single ## libmodbus 3.0.4 (2012-05-08) - autogen.sh creates symlinks instead of copies - Add missing m4 directory (closes #103) - Fix alignment problem on ARMv5 platform Thanks to Alexander Dahl - Remove useless test on error_recovery argument Thanks to Carlos Tangerino ## libmodbus 3.0.3 (2012-05-25) - Fix another Visual C++ 2008/2010 deficiency (closes #53) - Add -lsocket to compile on QNX - Fix TCP PI init under Windows. Thanks to oldfaber. - Fix a missing free in random-test-client Thanks again to Stefan Finzel. - Fix OMG bug in modbus_mapping_free not freeing memory. Thanks to Stefan Finzel for the bug report. - Fix semicolon typo and unistd.h include under Windows. Thanks to Andrew Kravchuk. ## libmodbus 3.0.2 (2012-01-16) - Update Debian package - Documentation fixes and additions - Add missing C++ macros in public headers. Thanks to Bernhard Agthe. - Protects modbus_mapping_free against NULL argument. Thanks to Andrea Mattia - Fix check on file doc/libmodbus.7 in acinclude.m4 (closes #28) - Close file descriptor when the settings don't apply in RTU. Original patch provided by Thomas Stalder. - unit-test.h is now generated to avoid config.h dependency. - Request for Windows Sockets specification version 2.2 instead of 2.0 Thanks to Pavel Mazniker for the report. ## libmodbus 3.0.1 (2011-07-18) - Avoid useless serial_mode integer when TIOCSRS485 isn't supported - Fix compilation failure on Windows (RS485 support) by Tobias Doerffel - Properly check TIOCSRS485 define by Matthijs Kool - Rename package to libmodbus5 to fix lintian warning ## libmodbus 3.0.0 (2011-07-11) - Revert libmodbus licence from LGPLv3 to LGPLv2.1 to avoid incompatibility with GPLv2 program. This change has been approved by Tobias Doerffel, Florian octo Forster and Hannu Vuolasaho. - Enable RS485 support only when available - Export modbus_set/get_serial_mode functions on all platforms - API change for read/write multiple registers function: - modbus_read_and_write_registers -> modbus_write_and_read_registers The function name was confusing because the write operation is performed before the read. Take care to swap the arguments in the migration process. - Documentation of modbus*write_and_read_registers, modbus_mapping_new/free, report_slave_id. modbus_get_byte_from_bits, modbus_set_bits_from_byte(s), modbus*[gs]et_float, modbus_reply and modbus_reply_exception. - Enhanced report slave ID - New RPM spec file to package documentation and development files ## libmodbus 2.9.4 (2011-06-05) - IPv6 support Make the TCP implementation "protocol independent" by Florian Forster and Stéphane Raimbault. - Fix compilation on Windows 7 (x64) with MinGW/MSYS and GCC 4.5 Reported by Patsy Kaye. - Documentation of libmodbus functions with AsciiDoc (man and HTML) by Stéphane Raimbault - Avoid an iteration in flush function - New functions to send and receive raw requests (modbus_send_raw_request, modbus_receive_confirmation) - Fix flush function of TCP backend on Windows - API changes for server/slave: - modbus_receive doesn't take socket/fd argument anymore - new function modbus_set_socket to set socket/fd - API changes for timeout functions: - modbus_get_timeout_begin -> modbus_get_response_timeout - modbus_set_timeout_begin -> modbus_set_response_timeout - modbus_get_timeout_end -> modbus_get_byte_timeout - modbus_set_timeout_end -> modbus_set_byte_timeout - Fix longstanding limitation of server to wait forever - New functions modbus_set/get_serial_mode by Manfred Gruber and Stéphane Raimbault for RS485 communications - Improved recovery mode (see modbus_set_error_recovery documentation) for data link and protocol errors. - Fix compilation issue with Microsoft Visual Studio 2008. Reported by Allan Cornet. ## libmodbus 2.9.3 (2011-01-14) - Major rewriting of the message reading (no more timeouts on exception) by Stéphane Raimbault - New function to reply to an indication with an exception message modbus_reply_exception() - New function modbus_get_header_length(modbus_t \*ctx) - New functions to manipulate data: - MODBUS_GET_INT32_FROM_INT16 - MODBUS_GET_INT16_FROM_INT8 - MODBUS_SET_INT16_TO_INT8 - Fix GH-2. Read/write were swapped in \_FC_READ_AND_WRITE_REGISTERS - Install an ignore handler for SIGPIPE on \*BSD Original patch by Jason Oster. - Fix closing of Win32 socket. Reported by Petr Parýzek. - Fix unit identifier not copied by the TCP server. Reported by Antti Manninen. - Fix missing modbus_flush() in unit tests - Fixes for OpenBSD by Barry Grumbine and Jason Oster ## libmodbus 2.9.2 (2010-12-05) - Win32 support by Tobias Doerffel - Split source code around RTU and TCP (backends) - Rename modbus*[listen|accept] to modbus_tcp*[listen|accept] - Remove slave argument from modbus_new_rtu() - Check received function code - Fix segfault in bandwidth-server-many-up on inet_ntoa() call - Fix unit test of report slave ID in RTU - Fix GH-3. Remove inclusion of config.h in modbus.h - Correctly detect if we are cross-compiling for win32 by Kirill Smelkov. - Fix setting of the broadcast address ## libmodbus 2.9.1 (2010-08-16) - Brand new API (see MIGRATION notes)! - Remove the internal function set_message_length_tcp - Restore slave ID (server ID) argument in functions - Error conventions of POSIX systems and error recover - Parity setting is now a single char ('N', 'E' or 'O') - Report slave ID server side - OpenBSD support by Anibal Limón. - New read and write registers function by Hannu Vuolasaho. - Versioning infrastructure Inspired by the Clutter project and the work done by Florian Forster. - Fix the broadcast constant (255 -> 0) Reported by David Olivari. - Fix #463299 - New functions to define the timeouts of begin and end of trame Original patch by Sisyph (eric-paul). - Fix #591142 - Slave id check should be disabled in TCP connection Reported by aladdinwu. ## libmodbus 2.1.0 (2010-03-24) - New API to read and write float values by Stéphane Raimbault and Florian Forster. - New API for slave server (see MIGRATION) - New slave server able to handle multiple connections - Slave only replies to broadcast queries or queries with its slave ID - Improved Modbus protocol conformance - modbus_param_t is smaller (2 int removed) - Better error management and SIGPIPE signal is blocked - Faster - Fix #333455 - Cygwin IPTOS_LOWDELAY not supported on cygwin Reported by Jeff Laughlin and Yishin Li. - Fix #375926 - modbus.c:164: error: `MSG_DONTWAIT' undeclared Reported and tested by Yishin Li. - Fix #378981 - CRC error on RTU response doesn't return negative value Reported by Henrik Munktell. - Fix report slave ID request Patch (bzr) provided by Paul Fertser. - Fix #425604 - Conditional jump or move depends on uninitialised value(s) Occurs on first occurrence of slave timeout. Reported by Henrik Munktell. - Fix #457200 - FreeBSD support Patch provided by Norbert Koch. Other changes: - The code is now published and developed on - Waf support has been removed ## libmodbus 2.0.3 (2009-03-22) - Fix CRC error when a slave RTU send a response. Thanks to Justin Carroll to have reported and tested my patch. - Remove an assignment in compute_response_length() - Remove duplicate counter in read_io_status() - Fix #274511 reported by 'Kylesch' Invalid error check in modbus_init_listen_tcp ## libmodbus 2.0.2 (2008-08-10) - Fix a bug reported by email by Davide Pippa The function modbus_receive must check the number of values indicated in the response accordingly to the query. - Fix #241006 reported by Jesus Hernandez Tapia modbus_check_response() crashes on an invalid exception code - Reduce the number of function calls (read_reg_response and preset_response have been removed) - Add a new unit test for bad response - Catch the timeout even if the length is equal to a exception trame - Test only msg_length_computed on change - Many comments and cleanups ## libmodbus 2.0.1 (2008-07-02) - Include libmodbus.spec in the tarball - Fix #241006 reported by Jesus Hernandez Tapia modbus_check_response() crashes on an invalid exception code ## libmodbus 2.0.0 (2008-05-18) - Slave API - No more glib dependency - Unit testing and many test programs - Waf build support - MacOS X support by Matthew Butch - Unit testing (unit-test-slave and unit-test-master) - Port number is now defined at initialisation by Dirk Reusch - Better memory management (uint8_t \*data and packing of modbus_param_t) - Better error management - Declare many static functions and const arrays - Enhance an integer division - The GNU licences LGPL and GPL are in version 3 - Debian and RPM packages (#224496) - Many cleanups - Fix #159443 reported by Stefan Bisanz Index of incoming data in force multiple coils function - Fix #161989 reported by Konstantinos Togias Serial device paths more than 10 chars long (eg. /dev/ttyUSB0) don't fit to modbus_param_t -> device char[11] var. - Fix #188189 reported by Chris Hellyar Compute_response_size() no entry for read_input_status() - Fix #191039 reported by Todd Denniston modbus.h is not installed at prefix. - Fix #211460 reported by Todd Denniston With TCP, automatic reconnect on error may not be desired. - Fix #224485 reported by Todd Denniston libmodbus does not link with c++ code. - Fix #224496 reported by Todd Denniston It is easier to install on rpm based systems with a spec file. ## libmodbus 1.2.5 (2008-05-18) - Fix #224485 reported by Todd Denniston libmodbus does not link with c++ code. ## libmodbus 1.2.4 (2008-03-14) - Fix #191039 reported by Todd Denniston modbus.h is not installed at prefix. ## libmodbus 1.2.3 (2008-02-03) - Fix #188189 reported by Chris Hellyar Compute_response_size() no entry for read_input_status() - Fix #181887 reported by Jesus Hernandez Tapia. Slave address in build_request_packet_tcp() is hardcoded as 0xFF. ## libmodbus 1.2.2 (2007-11-12) - Fix #161989 reported by Konstantinos Togias Serial device paths more than 10 chars long (eg. /dev/ttyUSB0) don't fit to modbus_param_t -> device char[11] var. - Structure is also bit better 'packed' to conserve memory (see the trunk for a real enhancement). ## libmodbus 1.2.1 (2007-11-02) - Fix #159443 reported by Stefan Bisanz Index of incoming data in force multiple coils function - Deleted useless code in check_crc16() - Untabify source code - Changed author's email to Stéphane Raimbault ## libmodbus 1.2.0 (2007-05-10) - FIX Compilation GCC-4.0 - Project name in autogen.sh