pax_global_header00006660000000000000000000000064124126162150014512gustar00rootroot0000000000000052 comment=d48d64de7d17cf711c11d4b9fde057439b9420a9 smcroute-2.0.0/000077500000000000000000000000001241261621500133525ustar00rootroot00000000000000smcroute-2.0.0/.gitignore000066400000000000000000000001341241261621500153400ustar00rootroot00000000000000autom4te.cache build.h config.h Makefile mcsender smcroute unittest .*.d *.o *.log *.status smcroute-2.0.0/.travis.yml000066400000000000000000000013101241261621500154560ustar00rootroot00000000000000# Travis CI integration language: c compiler: - gcc env: global: # The next declaration is the encrypted COVERITY_SCAN_TOKEN, created # via the "travis encrypt" command using the project repo's public key - secure: "BOySKarfB7ySP4SQ9vpeLz/Yrle3cxGYe+f5ep6OVk42M2bmonX27FdgVF5oKpII6Sq5hXrhoNrwRpkYRj+G5OUy4lguOALJ1AAtRpvlrfXCCL5Vxe9TDBNpmU/AfOcZoiGiR5Vpv96CIIoqvnB6XQJMMfTa2JHvU7tZCS2p9lU=" addons: coverity_scan: project: name: "troglobit/smcroute" description: "SMCRoute -- Static Multicast Routing Daemon" notification_email: troglobit@gmail.com build_command_prepend: "./configure" build_command: "make" branch_pattern: master script: ./configure && make smcroute-2.0.0/AUTHORS000066400000000000000000000012351241261621500144230ustar00rootroot00000000000000Authors ======= Year: 2001-2005 Author: Carsten Schill , original author Releases: --> 0.92 URL: http://www.cschill.de/smcroute/ Year: 2006-2011 Releases: Version 0.93 --> 0.95 Authors: Julien BLACHE , Todd Hayton , and Micha Lenk URL: http://alioth.debian.org/projects/smcroute Year: 2011- Releases: 1.93.0 --> Authors: Joachim Nilsson , Todd Hayton , Micha Lenk , and Julien BLACHE URL: https://github.com/troglobit/smcroute smcroute-2.0.0/COPYING000066400000000000000000000431051241261621500144100ustar00rootroot00000000000000 GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 51 Franklin St, 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 Library General Public License instead.) You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. 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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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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. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Library General Public License instead of this License. smcroute-2.0.0/ChangeLog000077700000000000000000000000001241261621500172702ChangeLog.mdustar00rootroot00000000000000smcroute-2.0.0/ChangeLog.md000066400000000000000000000153031241261621500155250ustar00rootroot00000000000000ChangeLog ========= smcroute 1.99.2 -> 2.0.0 ------------------------ * Multiple fixes of nasty bugs thanks to Coverity static code analysis! * Cleanup of Linux system anachronisms to make FreeBSD work again, GitHub issue #5 * Migrate to full GNU Configure and Build system, add Makefile.am, GitHub issue #6 -- heads up, packagers! * Add standard SysV init script, from Debian. GitHub issue #9 smcroute 1.99.1 -> 1.99.2 ------------------------- * Fix issue #2: Loop forever bug when deleting new (*,G) sourceless routes Bug report and patch by Jean-Baptiste Maillet smcroute 1.99.0 -> 1.99.1 ------------------------- * Fix possible memory leak on Linux * Fix missing #ifdefs when building on systems w/o IPv6 * Fix possible race in Makefile when building in (massive) parallel * Fix build problems on RedHat EL5/CentOS5, i.e., Linux <= 2.6.25 smcroute 1.98.3 -> 1.99.0 ------------------------- * Bugfix: SMCRoute segfault when starting on interface that is up but has no valid IPv4 address yet. Bug introduced in 1.98.3 * Feature: Experimental source-less `(*,G)` IPv4 multicast routing. Most UNIX kernels are (S,G) based, i.e., you need to supply the source address with the multicast group to setup a kernel routing rule. However, daemons like mrouted and pimd emulate `(*,G)` by listening for IGMPMSG_NOCACHE messages from the kernel. SMCRoute now also implements this, for IPv4 only atm, by placing all `(*,G)` routes in a list and adding matching (S,G) routes on-demand at runtime. All routes matching this (*,G) are removed when reloading the conf file on SIGHUP or when the user sends an IPC (-r) command to remove the (*,G) rule. * Feature: Actually check if running as root at startup. * Cleanup: Also, slightly improved error messages including some minor cleanup and readability improvements. smcroute 1.98.1 -> 1.98.3 ------------------------- * Cleanup IPv6 #ifdefs and replace IN6_MULTICAST() with IN6_IS_ADDR_MULTICAST() This commit cleans up a lot of the IPv6 related #ifdefs, some minor function name refactoring and squash of some _init and _enable funcs into one for clarity and clearer error messages to the user. * Check for existence of asprintf() to pidfile() and add -D_GNU_SOURCE to CPPFLAGS using AC_GNU_SOURCE in configure.ac * Fixes FTBFS when host lacks IPv6 support. smcroute 1.98.0 -> 1.98.1 ------------------------- * Bugfix: Client failed to send commands to daemon. * Bugfix: Several FTBFS fixed for GCC 4.6.x and -W -Wall smcroute 0.95 -> 1.98.0 ----------------------- * SMCRoute2 Announced! * Feature: Support for smcroute.conf file for daemon Add support for reading mroutes and mgroups from a configuration file. mgroup from IFNAME group MCGROUP mroute from IFNAME source ADDRESS group MCGROUP to IFNAME [IFNAME ...] Both IPv4 and IPv6 address formats are supported. * Feature: Support for signals, reload conf file on SIGHUP * Refactor: Insecure handling of pointers potentially outside array boundaries. * Bugfix: Invalid use of varargs in call to snprintf(), use vsnprintf() instead. * Feature: Add -n switch to support running smcroute in foreground. * Refactor: Major cleanup, reindent to Linux C-style, for improved maintainability. * Bugfix: Invalid MRouterFD6 fd crashes smcroute, always check for valid fd. * Bugfix: Several minor bugfixes; type mismatches and unused return values. smcroute 0.94.1 -> 0.95 ----------------------- * Feature request #313278: Added support for FreeBSD SMCRoute now builds and runs on FreeBSD kernels. This was successfully tested with the FreeBSD port of Debian using FreeBSD 8.1. Other BSD flavours or versions might work too. Any feedback is appreciated. https://alioth.debian.org/tracker/index.php?func=detail&aid=313278 * Feature request #313190: Debug logging is now disabled by default. If you want to enable debug logging again, start the daemon with parameter '-D'. https://alioth.debian.org/tracker/index.php?func=detail&aid=313190 smcroute 0.94 -> 0.94.1 ----------------------- * Bugfix: In case the kernel refuses write access to the file /proc/sys/net/ipv6/conf/all/mc_forwarding, don't let smcroute exit with an error, but proceed with normal operation without writing a "1" to this file. Apparently newer Linux kernels take care for the correct content of this file automatically whenever the IPv6 multicast routing API is initialized by a process. smcroute 0.93 -> 0.94 --------------------- * Added support for IPv6 multicast routing in smcroute. SMCRoute now supports addition and removal of IPv6 multicast routes. It will automatically detect which type of route to add or delete based on the type (IPv4/IPv6) of addresses provided for the add and remove commands. * Added support for joins and leaves ('j'/'l') to IPv6 multicast groups. * Added support for sending to IPv6 multicast addresses to mcsender tool. * Added command line option to mcsender tool to allow user to specify the outgoing interface for datagrams sent. * Added autoconf support for smcroute build. smcroute 0.92 -> 0.93 --------------------- * Fixed the "smcroute looses output interfaces" bug Carsten Schill, 0.93 unreleased smcroute 0.90 -> 0.92 --------------------- * Fixed the 'mroute: pending queue full, dropping entries' error Smcroute 0.90 didn't care about the IGMP messages delivered to the UDP socket that establish the MC-Router API. After some time the queue for the sockets filled up and the 'pending queue full' message was send from the kernel. To my knowledge this didn't affect smcroute or the operating system. - version 0.92 reads the ICMP messages now from the UDP socket and logs them to syslog with daemon/debug - smcroute does no further processing of this messages * Increased the number of supported interfaces The 16 interface limit of version 0.90 (interfaces as listed with ifconfig) was to small, especially when alias interfaces where defined. - up to 40 interfaces are no recognized by smcroute - this does not change the number of 'virtual interfaces' supported by the kernel (32) - not all interfaces recognized by smcroute (40) results in a 'virtual interface' of the kernel (32) smcroute 0.80 -> 0.90 --------------------- * Added MC group join (-j) and leave (-l) functionality - the options enable/disable the sending of IGMP join messages for a multicast group on a specific interface * Removed the ' [] ...' for the '-r' option - they are not used by the kernel to identify the route to remove - smcroute will not complain about extra arguments for the '-r' option to stay compatible with releases <= 0.80 * Improved error handling for some typical error situations * Added a test script (tst-smcroute.pl) * Added a man page * Fixed some minor bugs smcroute-2.0.0/Makefile.am000066400000000000000000000035621241261621500154140ustar00rootroot00000000000000## SMCRoute - A static multicast routing tool -*-Makefile-*- dist_man8_MANS = smcroute.8 mcsender.8 doc_DATA = README AUTHORS TODO ChangeLog COPYING \ smcroute.conf smcroute.init EXTRA_DIST = autogen.sh smcroute.conf smcroute.init bin_PROGRAMS = smcroute mcsender mcsender_SOURCES = mcsender.c syslog.c smcroute_SOURCES = smcroute.c mroute-api.c ifvc.c cmdpkt.c ipc.c \ mcgroup.c parse-conf.c syslog.c pidfile.c mclab.h DISTCLEANFILES = *~ DEADJOE semantic.cache *.gdb *.elf core core.* *.d ## Generate detached signature file (ascii-armored), like OpenVPN does GPG = gpg gpg-dist: for file in $(DIST_ARCHIVES); do \ $(GPG) -ba $$file; \ done ## Generate MD5 checksum file MD5 = md5sum md5-dist: @for file in $(DIST_ARCHIVES); do \ $(MD5) $$file > $$file.md5; \ done ## Check if tagged in git release-hook: if [ ! `git tag | grep $(PACKAGE_VERSION)` ]; then \ echo; \ printf "\e[1m\e[41mCannot find release tag $(PACKAGE_VERSION)\e[0m\n"; \ printf "\e[1m\e[5mDo release anyway?\e[0m "; read yorn; \ if [ "$$yorn" != "y" -a "$$yorn" != "Y" ]; then \ printf "OK, aborting release.\n"; \ exit 1; \ fi; \ echo; \ else \ echo; \ printf "\e[1m\e[42mFound GIT release tag $(PACKAGE_VERSION)\e[0m\n"; \ printf "\e[1m\e[44m>>Remember to push tags!\e[0m\n"; \ echo; \ fi ## Target to run when building a release release: distcheck release-hook md5-dist gpg-dist @echo @echo "Resulting release files:" @echo "=================================================================" @for file in $(DIST_ARCHIVES); do \ printf "$$file \tDistribution tarball\n"; \ printf "$$file.md5\t"; cat $$file.md5 | cut -f1 -d' '; \ printf "$$file.asc\tGPG signature "; gpg --verify $$file.asc 2>&1 \ | grep 'key ID' | sed 's/.*using \(.*\)/\1/'; echo; \ done smcroute-2.0.0/Makefile.in000066400000000000000000000706461241261621500154340ustar00rootroot00000000000000# Makefile.in generated by automake 1.11.6 from Makefile.am. # @configure_input@ # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, # 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software # Foundation, Inc. # This Makefile.in is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY, to the extent permitted by law; without # even the implied warranty of MERCHANTABILITY or FITNESS FOR A # PARTICULAR PURPOSE. @SET_MAKE@ VPATH = @srcdir@ am__make_dryrun = \ { \ am__dry=no; \ case $$MAKEFLAGS in \ *\\[\ \ ]*) \ echo 'am--echo: ; @echo "AM" OK' | $(MAKE) -f - 2>/dev/null \ | grep '^AM OK$$' >/dev/null || am__dry=yes;; \ *) \ for am__flg in $$MAKEFLAGS; do \ case $$am__flg in \ *=*|--*) ;; \ *n*) am__dry=yes; break;; \ esac; \ done;; \ esac; \ test $$am__dry = yes; \ } pkgdatadir = $(datadir)/@PACKAGE@ pkgincludedir = $(includedir)/@PACKAGE@ pkglibdir = $(libdir)/@PACKAGE@ pkglibexecdir = $(libexecdir)/@PACKAGE@ am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd install_sh_DATA = $(install_sh) -c -m 644 install_sh_PROGRAM = $(install_sh) -c install_sh_SCRIPT = $(install_sh) -c INSTALL_HEADER = $(INSTALL_DATA) transform = $(program_transform_name) NORMAL_INSTALL = : PRE_INSTALL = : POST_INSTALL = : NORMAL_UNINSTALL = : PRE_UNINSTALL = : POST_UNINSTALL = : bin_PROGRAMS = smcroute$(EXEEXT) mcsender$(EXEEXT) subdir = . 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\ done # Tell versions [3.59,3.63) of GNU make to not export all variables. # Otherwise a system limit (for SysV at least) may be exceeded. .NOEXPORT: smcroute-2.0.0/README000077700000000000000000000000001241261621500155042README.mdustar00rootroot00000000000000smcroute-2.0.0/README.md000066400000000000000000000065121241261621500146350ustar00rootroot00000000000000SMCRoute - A static multicast route tool ======================================== [![Build Status](https://travis-ci.org/troglobit/smcroute.png?branch=master)](https://travis-ci.org/troglobit/smcroute)[![Coverity Scan Status](https://scan.coverity.com/projects/3061/badge.svg)](https://scan.coverity.com/projects/3061) SMCRoute is a command line tool to manipulate the multicast routes of a UNIX kernel. It supports both IPv4 and IPv6 multicast routing. SMCRoute can be used as an alternative to dynamic multicast routers like mrouted or pimd in setups where static multicast routes should be maintained and/or no proper IGMP or MLD signaling exists. Generally multicast routes exists in the kernel only as long as SMCRoute or another multicast routing daemon is running. Only one multicast routing daemon can be active at a time, so it's impossible to run SMCRoute and, e.g., mrouted at the same time. SMCRoute is maintained at GitHub. Previously the code has been hosted by Debian at Alioth and before that by Carsten Schill, the original author. Usage ----- SMCRoute is both a daemon and a client. You must start the daemon to be able to setup multicast routes. # smcroute -d By default SMCRoute looks for its configuration in `/etc/smcroute.conf`, which can look something like this: mgroup from eth0 group 225.1.2.3 mroute from eth0 group 225.1.2.3 source 192.168.1.42 to eth1 eth2 The first line means "Join multicast group 225.1.2.3 on interface eth0", and is for layer-2 devices (switches) with IGMP snooping implemented to open up multicast for that group to be flooded to us. The second line is the actual layer-3 routing entry. Here we say that multicast data originating from 192.168.1.42 on eth0 to multicast group 225.1.2.3 should be routed to interfaces eth1 and eth2. *Note:* To test the above you can use ping from another device. The multicast should be visible as long as your IP# matches the source above and you ping 225.1.2.3 AND REMEMBER TO SET TTL >1! $ ping -I eth0 -t 2 225.1.2.3 The TTL is what usually bites people trying out multicast the first time. There is a good reason for applications, e.g., ping to default to a TTL=1 for multicast. That is to reduce the risk of flooding your network with data, remember multicast is like broadcast in nature. Only IGMP snooping aware switches can help mitigate its broadcast effect. Traditionally, however, SMCRoute only had the client interface to interact with the daemon. To achieve the above two config file lines you have to: # sleep 1 To allow the daemon to startup properly (above) before interacting with it. # smcroute -j eth0 225.1.2.3 # smcroute -a eth0 192.168.1.42 225.1.2.3 eth1 eth2 Experimental ------------ Many people sometimes do not know where the multicast will originate from, or it will originate from several different sources but never at the same time. Up until 1.98.3 a user had to setup a unique routing rule for each possible source and group to be routed. However, as of 1.99.0 it is possible to use the wildcard address 0.0.0.0 (INADDR_ANY) for IPv4 multicast routes. Example smcroute.conf: mgroup from eth0 group 225.1.2.3 mroute from eth0 group 225.1.2.3 to eth1 eth2 or, from the command line: # smcroute -j eth0 225.1.2.3 # smcroute -a eth0 0.0.0.0 225.1.2.3 eth1 eth2 Good Luck! The SMCRoute Maintainers smcroute-2.0.0/TODO000066400000000000000000000011301241261621500140350ustar00rootroot00000000000000 -*-org-*- * Add IPv6 support for (*, G), i.e., on-demand, routing rules. In SMCRoute 1.99.0 IPv4 support for source-less multicast routes was added. Adding support for IPv6 should be fairly straight forward, but needs figuring out the kernel interface and extensive testing. * Support for detecting link up/down on interfaces Also requires updating VIF/MIFs and mroutes accordingly. Optimal, and almost required, behavior would be to handle such transitions without losing any traffic over established/active routing rules. smcroute-2.0.0/_mcclient.c000066400000000000000000000024221241261621500154530ustar00rootroot00000000000000/* Multicast test tool * * Copyright (C) 2001-2005 Carsten Schill * Copyright (C) 2006-2009 Julien BLACHE * Copyright (C) 2009 Todd Hayton * Copyright (C) 2009-2011 Micha Lenk * Copyright (C) 2011-2013 Joachim Nilsson * * 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 St, Fifth Floor, Boston, MA 02110-1301 USA */ #include "mclab.h" int main(void) { mcgroup4_join("eth0", 0xe1e1e1e1); printf("\nEnter for end\n"); getchar(); return 0; } /** * Local Variables: * version-control: t * indent-tabs-mode: t * c-file-style: "linux" * End: */ smcroute-2.0.0/aclocal.m4000066400000000000000000001075761241261621500152320ustar00rootroot00000000000000# generated automatically by aclocal 1.11.6 -*- Autoconf -*- # Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, # 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, # Inc. # This file is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY, to the extent permitted by law; without # even the implied warranty of MERCHANTABILITY or FITNESS FOR A # PARTICULAR PURPOSE. m4_ifndef([AC_AUTOCONF_VERSION], [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.69],, [m4_warning([this file was generated for autoconf 2.69. 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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 St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include "mclab.h" /** * cmd_build - Create IPC command to send to daemon * @cmd: Command, one of 'a', 'r', 'j' or 'l' * @argv: Vector of arguments for @cmd * @count: Number of arguments in @argv * * Builds an command packet with the command @cmd and @count number of * arguments from @argv. * * Returns: * Pointer to a dynamically allocated command packet, or %NULL on failure * to allocate enought memory. */ void *cmd_build(char cmd, const char *argv[], int count) { int i; char *ptr; size_t arg_len = 0, packet_len; struct cmd *packet; /* Summarize length of all arguments/commands */ for (i = 0; i < count; i++) arg_len += strlen(argv[i]) + 1; /* resulting packet size */ packet_len = sizeof(struct cmd) + arg_len + 1; if (packet_len > MX_CMDPKT_SZ) { errno = EMSGSIZE; return NULL; } /* build packet */ packet = malloc(packet_len); if (!packet) return NULL; packet->len = packet_len; packet->cmd = cmd; packet->count = count; /* copy args */ ptr = (char *)(packet->argv); for (i = 0; i < count; i++) { arg_len = strlen(argv[i]) + 1; memcpy(ptr, argv[i], arg_len); ptr += arg_len; } *ptr = '\0'; /* '\0' behind last string */ return packet; } /** * cmd_convert_to_mroute - Convert IPC command from client to desired mulicast route * @mroute: Pointer to &struct mroute to convert to * @packet: Pointer to &struct cmd IPC command * * Converts a command @packet to an @mroute for the 'add' and 'remove' * commands. The IP version is determined by searching for ':' in the * address strings to indicate IPv6 addresses. * * Returns: * %NULL on success, or an error string with a hint why the operation failed. */ const char *cmd_convert_to_mroute(struct mroute *mroute, const struct cmd *packet) { char *arg = (char *)packet->argv; memset(mroute, 0, sizeof(*mroute)); switch (packet->cmd) { case 'a': case 'r': /* -a eth0 1.1.1.1 239.1.1.1 eth1 eth2 * * +----+-----+---+--------------------------------------------+ * | 42 | 'a' | 5 | "eth0\01.1.1.1\0239.1.1.1\0eth1\0eth2\0\0" | * +----+-----+---+--------------------------------------------+ * ^ ^ * | | * | | * +-----cmd------+ * * -r 1.1.1.1 239.1.1.1 * * +----+-----+---+--------------------------+ * | 27 | 'r' | 2 | "1.1.1.1\0239.1.1.1\0\0" | * +----+-----+---+--------------------------+ * ^ ^ * | | * | | * +-----cmd------+ */ if (packet->cmd == 'a' || packet->count > 2) arg += strlen(arg) + 1; if (strchr(arg, ':') != NULL) { mroute->version = 6; return cmd_convert_to_mroute6(&mroute->u.mroute6, packet); } else { mroute->version = 4; return cmd_convert_to_mroute4(&mroute->u.mroute4, packet); } break; default: return "Invalid command"; } return NULL; } const char *cmd_convert_to_mroute4(struct mroute4 *mroute, const struct cmd *packet) { char *arg = (char *)packet->argv; memset(mroute, 0, sizeof(*mroute)); /* -a eth0 1.1.1.1 239.1.1.1 eth1 eth2 * * +----+-----+---+--------------------------------------------+ * | 42 | 'a' | 5 | "eth0\01.1.1.1\0239.1.1.1\0eth1\0eth2\0\0" | * +----+-----+---+--------------------------------------------+ * ^ ^ * | | * | | * +-----cmd------+ */ /* get input interface index */ if (!*arg || (mroute->inbound = iface_get_vif_by_name(arg)) < 0) return "Invalid input interface"; /* get origin */ arg += strlen(arg) + 1; if (!*arg || (inet_pton(AF_INET, arg, &mroute->sender) <= 0)) return "Invalid origin IPv4 address"; /* get multicast group */ arg += strlen(arg) + 1; if (!*arg || (inet_pton(AF_INET, arg, &mroute->group) <= 0) || !IN_MULTICAST(ntohl(mroute->group.s_addr))) return "Invalid multicast group"; /* * Scan output interfaces for the 'add' command only, just ignore it * for the 'remove' command to be compatible to the first release. */ if (packet->cmd == 'a') { for (arg += strlen(arg) + 1; *arg; arg += strlen(arg) + 1) { int vif; if ((vif = iface_get_vif_by_name(arg)) < 0) return "Invalid output interface"; if (vif == mroute->inbound) smclog(LOG_WARNING, 0, "Same outbound interface as inbound %s?", arg); mroute->ttl[vif] = 1; /* Use a TTL threashold */ } } return NULL; } const char *cmd_convert_to_mroute6(struct mroute6 *mroute, const struct cmd *packet) { const char *arg = (const char *)(packet + 1); memset(mroute, 0, sizeof(*mroute)); /* get input interface index */ if (!*arg || (mroute->inbound = iface_get_mif_by_name(arg)) < 0) return "Invalid input interface"; /* get origin */ arg += strlen(arg) + 1; if (!*arg || (inet_pton(AF_INET6, arg, &mroute->sender.sin6_addr) <= 0)) return "Invalid origin IPv6 address"; /* get multicast group */ arg += strlen(arg) + 1; if (!*arg || (inet_pton(AF_INET6, arg, &mroute->group.sin6_addr) <= 0) || !IN6_IS_ADDR_MULTICAST(&mroute->group.sin6_addr)) return "Invalid multicast group"; /* * Scan output interfaces for the 'add' command only, just ignore it * for the 'remove' command to be compatible to the first release. */ if (packet->cmd == 'a') { for (arg += strlen(arg) + 1; *arg; arg += strlen(arg) + 1) { int mif; if ((mif = iface_get_mif_by_name(arg)) < 0) return "Invalid output interface"; if (mif == mroute->inbound) smclog(LOG_WARNING, 0, "Same outbound interface as inbound %s?", arg); mroute->ttl[mif] = 1; /* Use a TTL threashold */ } } return NULL; } /** * Local Variables: * version-control: t * indent-tabs-mode: t * c-file-style: "linux" * End: */ smcroute-2.0.0/compile000077500000000000000000000162451241261621500147400ustar00rootroot00000000000000#! /bin/sh # Wrapper for compilers which do not understand '-c -o'. scriptversion=2012-10-14.11; # UTC # Copyright (C) 1999-2013 Free Software Foundation, Inc. # Written by Tom Tromey . # # 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, 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. 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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 . # As a special exception to the GNU General Public License, if you # distribute this file as part of a program that contains a # configuration script generated by Autoconf, you may include it under # the same distribution terms that you use for the rest of that program. # Originally written by Alexandre Oliva . case $1 in '') echo "$0: No command. Try '$0 --help' for more information." 1>&2 exit 1; ;; -h | --h*) cat <<\EOF Usage: depcomp [--help] [--version] PROGRAM [ARGS] Run PROGRAMS ARGS to compile a file, generating dependencies as side-effects. Environment variables: depmode Dependency tracking mode. source Source file read by 'PROGRAMS ARGS'. object Object file output by 'PROGRAMS ARGS'. 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Yay! Note: for some reason libtool 1.4 doesn't like ## it if -MD -MP comes after the -MF stuff. Hmm. ## Unfortunately, FreeBSD c89 acceptance of flags depends upon ## the command line argument order; so add the flags where they ## appear in depend2.am. Note that the slowdown incurred here ## affects only configure: in makefiles, %FASTDEP% shortcuts this. for arg do case $arg in -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;; *) set fnord "$@" "$arg" ;; esac shift # fnord shift # $arg done "$@" stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi mv "$tmpdepfile" "$depfile" ;; gcc) ## Note that this doesn't just cater to obsosete pre-3.x GCC compilers. ## but also to in-use compilers like IMB xlc/xlC and the HP C compiler. ## (see the conditional assignment to $gccflag above). ## There are various ways to get dependency output from gcc. 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Also, it might not be ## supported by the other compilers which use the 'gcc' depmode. ## - Using -M directly means running the compiler twice (even worse ## than renaming). if test -z "$gccflag"; then gccflag=-MD, fi "$@" -Wp,"$gccflag$tmpdepfile" stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" echo "$object : \\" > "$depfile" # The second -e expression handles DOS-style file names with drive # letters. sed -e 's/^[^:]*: / /' \ -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile" ## This next piece of magic avoids the "deleted header file" problem. ## The problem is that when a header file which appears in a .P file ## is deleted, the dependency causes make to die (because there is ## typically no way to rebuild the header). We avoid this by adding ## dummy dependencies for each header file. Too bad gcc doesn't do ## this for us directly. ## Some versions of gcc put a space before the ':'. On the theory ## that the space means something, we add a space to the output as ## well. hp depmode also adds that space, but also prefixes the VPATH ## to the object. Take care to not repeat it in the output. ## Some versions of the HPUX 10.20 sed can't process this invocation ## correctly. Breaking it into two sed invocations is a workaround. tr ' ' "$nl" < "$tmpdepfile" \ | sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \ | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; hp) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; sgi) if test "$libtool" = yes; then "$@" "-Wp,-MDupdate,$tmpdepfile" else "$@" -MDupdate "$tmpdepfile" fi stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" if test -f "$tmpdepfile"; then # yes, the sourcefile depend on other files echo "$object : \\" > "$depfile" # Clip off the initial element (the dependent). Don't try to be # clever and replace this with sed code, as IRIX sed won't handle # lines with more than a fixed number of characters (4096 in # IRIX 6.2 sed, 8192 in IRIX 6.5). We also remove comment lines; # the IRIX cc adds comments like '#:fec' to the end of the # dependency line. tr ' ' "$nl" < "$tmpdepfile" \ | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \ | tr "$nl" ' ' >> "$depfile" echo >> "$depfile" # The second pass generates a dummy entry for each header file. tr ' ' "$nl" < "$tmpdepfile" \ | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \ >> "$depfile" else make_dummy_depfile fi rm -f "$tmpdepfile" ;; xlc) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; aix) # The C for AIX Compiler uses -M and outputs the dependencies # in a .u file. In older versions, this file always lives in the # current directory. Also, the AIX compiler puts '$object:' at the # start of each line; $object doesn't have directory information. # Version 6 uses the directory in both cases. set_dir_from "$object" set_base_from "$object" if test "$libtool" = yes; then tmpdepfile1=$dir$base.u tmpdepfile2=$base.u tmpdepfile3=$dir.libs/$base.u "$@" -Wc,-M else tmpdepfile1=$dir$base.u tmpdepfile2=$dir$base.u tmpdepfile3=$dir$base.u "$@" -M fi stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" exit $stat fi for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" do test -f "$tmpdepfile" && break done aix_post_process_depfile ;; tcc) # tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26 # FIXME: That version still under development at the moment of writing. # Make that this statement remains true also for stable, released # versions. # It will wrap lines (doesn't matter whether long or short) with a # trailing '\', as in: # # foo.o : \ # foo.c \ # foo.h \ # # It will put a trailing '\' even on the last line, and will use leading # spaces rather than leading tabs (at least since its commit 0394caf7 # "Emit spaces for -MD"). "$@" -MD -MF "$tmpdepfile" stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'. # We have to change lines of the first kind to '$object: \'. sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile" # And for each line of the second kind, we have to emit a 'dep.h:' # dummy dependency, to avoid the deleted-header problem. sed -n -e 's|^ *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile" rm -f "$tmpdepfile" ;; ## The order of this option in the case statement is important, since the ## shell code in configure will try each of these formats in the order ## listed in this file. A plain '-MD' option would be understood by many ## compilers, so we must ensure this comes after the gcc and icc options. pgcc) # Portland's C compiler understands '-MD'. # Will always output deps to 'file.d' where file is the root name of the # source file under compilation, even if file resides in a subdirectory. # The object file name does not affect the name of the '.d' file. # pgcc 10.2 will output # foo.o: sub/foo.c sub/foo.h # and will wrap long lines using '\' : # foo.o: sub/foo.c ... \ # sub/foo.h ... \ # ... set_dir_from "$object" # Use the source, not the object, to determine the base name, since # that's sadly what pgcc will do too. set_base_from "$source" tmpdepfile=$base.d # For projects that build the same source file twice into different object # files, the pgcc approach of using the *source* file root name can cause # problems in parallel builds. Use a locking strategy to avoid stomping on # the same $tmpdepfile. lockdir=$base.d-lock trap " echo '$0: caught signal, cleaning up...' >&2 rmdir '$lockdir' exit 1 " 1 2 13 15 numtries=100 i=$numtries while test $i -gt 0; do # mkdir is a portable test-and-set. if mkdir "$lockdir" 2>/dev/null; then # This process acquired the lock. "$@" -MD stat=$? # Release the lock. rmdir "$lockdir" break else # If the lock is being held by a different process, wait # until the winning process is done or we timeout. while test -d "$lockdir" && test $i -gt 0; do sleep 1 i=`expr $i - 1` done fi i=`expr $i - 1` done trap - 1 2 13 15 if test $i -le 0; then echo "$0: failed to acquire lock after $numtries attempts" >&2 echo "$0: check lockdir '$lockdir'" >&2 exit 1 fi if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" # Each line is of the form `foo.o: dependent.h', # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'. # Do two passes, one to just change these to # `$object: dependent.h' and one to simply `dependent.h:'. sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile" # Some versions of the HPUX 10.20 sed can't process this invocation # correctly. Breaking it into two sed invocations is a workaround. sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \ | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; hp2) # The "hp" stanza above does not work with aCC (C++) and HP's ia64 # compilers, which have integrated preprocessors. The correct option # to use with these is +Maked; it writes dependencies to a file named # 'foo.d', which lands next to the object file, wherever that # happens to be. # Much of this is similar to the tru64 case; see comments there. set_dir_from "$object" set_base_from "$object" if test "$libtool" = yes; then tmpdepfile1=$dir$base.d tmpdepfile2=$dir.libs/$base.d "$@" -Wc,+Maked else tmpdepfile1=$dir$base.d tmpdepfile2=$dir$base.d "$@" +Maked fi stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile1" "$tmpdepfile2" exit $stat fi for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" do test -f "$tmpdepfile" && break done if test -f "$tmpdepfile"; then sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile" # Add 'dependent.h:' lines. sed -ne '2,${ s/^ *// s/ \\*$// s/$/:/ p }' "$tmpdepfile" >> "$depfile" else make_dummy_depfile fi rm -f "$tmpdepfile" "$tmpdepfile2" ;; tru64) # The Tru64 compiler uses -MD to generate dependencies as a side # effect. 'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'. # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put # dependencies in 'foo.d' instead, so we check for that too. # Subdirectories are respected. set_dir_from "$object" set_base_from "$object" if test "$libtool" = yes; then # Libtool generates 2 separate objects for the 2 libraries. These # two compilations output dependencies in $dir.libs/$base.o.d and # in $dir$base.o.d. We have to check for both files, because # one of the two compilations can be disabled. We should prefer # $dir$base.o.d over $dir.libs/$base.o.d because the latter is # automatically cleaned when .libs/ is deleted, while ignoring # the former would cause a distcleancheck panic. tmpdepfile1=$dir$base.o.d # libtool 1.5 tmpdepfile2=$dir.libs/$base.o.d # Likewise. tmpdepfile3=$dir.libs/$base.d # Compaq CCC V6.2-504 "$@" -Wc,-MD else tmpdepfile1=$dir$base.d tmpdepfile2=$dir$base.d tmpdepfile3=$dir$base.d "$@" -MD fi stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" exit $stat fi for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" do test -f "$tmpdepfile" && break done # Same post-processing that is required for AIX mode. aix_post_process_depfile ;; msvc7) if test "$libtool" = yes; then showIncludes=-Wc,-showIncludes else showIncludes=-showIncludes fi "$@" $showIncludes > "$tmpdepfile" stat=$? grep -v '^Note: including file: ' "$tmpdepfile" if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" echo "$object : \\" > "$depfile" # The first sed program below extracts the file names and escapes # backslashes for cygpath. The second sed program outputs the file # name when reading, but also accumulates all include files in the # hold buffer in order to output them again at the end. This only # works with sed implementations that can handle large buffers. sed < "$tmpdepfile" -n ' /^Note: including file: *\(.*\)/ { s//\1/ s/\\/\\\\/g p }' | $cygpath_u | sort -u | sed -n ' s/ /\\ /g s/\(.*\)/'"$tab"'\1 \\/p s/.\(.*\) \\/\1:/ H $ { s/.*/'"$tab"'/ G p }' >> "$depfile" echo >> "$depfile" # make sure the fragment doesn't end with a backslash rm -f "$tmpdepfile" ;; msvc7msys) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; #nosideeffect) # This comment above is used by automake to tell side-effect # dependency tracking mechanisms from slower ones. dashmstdout) # Important note: in order to support this mode, a compiler *must* # always write the preprocessed file to stdout, regardless of -o. "$@" || exit $? # Remove the call to Libtool. if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi # Remove '-o $object'. IFS=" " for arg do case $arg in -o) shift ;; $object) shift ;; *) set fnord "$@" "$arg" shift # fnord shift # $arg ;; esac done test -z "$dashmflag" && dashmflag=-M # Require at least two characters before searching for ':' # in the target name. This is to cope with DOS-style filenames: # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise. "$@" $dashmflag | sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile" rm -f "$depfile" cat < "$tmpdepfile" > "$depfile" # Some versions of the HPUX 10.20 sed can't process this sed invocation # correctly. Breaking it into two sed invocations is a workaround. tr ' ' "$nl" < "$tmpdepfile" \ | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \ | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; dashXmstdout) # This case only exists to satisfy depend.m4. It is never actually # run, as this mode is specially recognized in the preamble. exit 1 ;; makedepend) "$@" || exit $? # Remove any Libtool call if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi # X makedepend shift cleared=no eat=no for arg do case $cleared in no) set ""; shift cleared=yes ;; esac if test $eat = yes; then eat=no continue fi case "$arg" in -D*|-I*) set fnord "$@" "$arg"; shift ;; # Strip any option that makedepend may not understand. Remove # the object too, otherwise makedepend will parse it as a source file. -arch) eat=yes ;; -*|$object) ;; *) set fnord "$@" "$arg"; shift ;; esac done obj_suffix=`echo "$object" | sed 's/^.*\././'` touch "$tmpdepfile" ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@" rm -f "$depfile" # makedepend may prepend the VPATH from the source file name to the object. # No need to regex-escape $object, excess matching of '.' is harmless. sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile" # Some versions of the HPUX 10.20 sed can't process the last invocation # correctly. Breaking it into two sed invocations is a workaround. sed '1,2d' "$tmpdepfile" \ | tr ' ' "$nl" \ | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \ | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" "$tmpdepfile".bak ;; cpp) # Important note: in order to support this mode, a compiler *must* # always write the preprocessed file to stdout. "$@" || exit $? # Remove the call to Libtool. if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi # Remove '-o $object'. IFS=" " for arg do case $arg in -o) shift ;; $object) shift ;; *) set fnord "$@" "$arg" shift # fnord shift # $arg ;; esac done "$@" -E \ | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \ -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \ | sed '$ s: \\$::' > "$tmpdepfile" rm -f "$depfile" echo "$object : \\" > "$depfile" cat < "$tmpdepfile" >> "$depfile" sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; msvisualcpp) # Important note: in order to support this mode, a compiler *must* # always write the preprocessed file to stdout. "$@" || exit $? # Remove the call to Libtool. if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi IFS=" " for arg do case "$arg" in -o) shift ;; $object) shift ;; "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI") set fnord "$@" shift shift ;; *) set fnord "$@" "$arg" shift shift ;; esac done "$@" -E 2>/dev/null | sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile" rm -f "$depfile" echo "$object : \\" > "$depfile" sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile" echo "$tab" >> "$depfile" sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile" rm -f "$tmpdepfile" ;; msvcmsys) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; none) exec "$@" ;; *) echo "Unknown depmode $depmode" 1>&2 exit 1 ;; esac exit 0 # Local Variables: # mode: shell-script # sh-indentation: 2 # eval: (add-hook 'write-file-hooks 'time-stamp) # time-stamp-start: "scriptversion=" # time-stamp-format: "%:y-%02m-%02d.%02H" # time-stamp-time-zone: "UTC" # time-stamp-end: "; # UTC" # End: smcroute-2.0.0/ifvc.c000066400000000000000000000136221241261621500144510ustar00rootroot00000000000000/* Physical and virtual interface API * * Copyright (C) 2001-2005 Carsten Schill * Copyright (C) 2006-2009 Julien BLACHE * Copyright (C) 2009 Todd Hayton * Copyright (C) 2009-2011 Micha Lenk * Copyright (C) 2011-2013 Joachim Nilsson * * 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 St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include #include "mclab.h" static unsigned int num_ifaces = 0; static struct iface *iface_list = NULL; /** * iface_init - Setup vector of active interfaces * * Builds up a vector with active system interfaces. Must be called * before any other interface functions in this module! */ void iface_init(void) { int family; struct iface *iface; struct ifaddrs *ifaddr, *ifa; num_ifaces = 0; if (iface_list) free(iface_list); iface_list = calloc(MAX_IF, sizeof(struct iface)); if (!iface_list) { smclog(LOG_ERR, errno, "Failed allocating space for interfaces"); return; } if (getifaddrs(&ifaddr) == -1) { smclog(LOG_ERR, errno, "Failed retrieving interface addresses"); return; } for (ifa = ifaddr; ifa && num_ifaces < MAX_IF; ifa = ifa->ifa_next) { /* Skip interface without internet address */ if (!ifa->ifa_addr) continue; /* Skip non-IPv4 and non-IPv6 interfaces */ family = ifa->ifa_addr->sa_family; if ((family != AF_INET) && (family != AF_INET6)) continue; /* Check if already added? */ if (iface_find_by_name (ifa->ifa_name)) continue; /* Copy data from interface iterator 'ifa' */ iface = &iface_list[num_ifaces++]; strncpy(iface->name, ifa->ifa_name, IFNAMSIZ); iface->name[IFNAMSIZ] = 0; if (family == AF_INET) iface->inaddr.s_addr = ((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr; iface->flags = ifa->ifa_flags; iface->ifindex = if_nametoindex(iface->name); iface->vif = -1; iface->mif = -1; } freeifaddrs(ifaddr); } /** * iface_find_by_name - Find an interface by name * @ifname: Interface name * * Returns: * Pointer to a @struct iface of the matching interface, or %NULL if no * interface exists, or is up. If more than one interface exists, chose * the interface that corresponds to a virtual interface. */ struct iface *iface_find_by_name(const char *ifname) { unsigned int i; struct iface *iface; struct iface *candidate = NULL; for (i = 0; i < num_ifaces; i++) { iface = &iface_list[i]; if (!strcmp(ifname, iface->name)) { if (iface->vif >= 0) return iface; candidate = iface; } } return candidate; } /** * iface_find_by_vif - Find by virtual interface index * @vif: Virtual multicast interface index * * Returns: * Pointer to a @struct iface of the requested interface, or %NULL if no * interface matching @vif exists. */ struct iface *iface_find_by_vif(int vif) { size_t i; for (i = 0; i < num_ifaces; i++) { struct iface *iface = &iface_list[i]; if (iface->vif >= 0 && iface->vif == vif) return iface; } return NULL; } /** * iface_find_by_index - Find by kernel interface index * @ifindex: Kernel interface index * * Returns: * Pointer to a @struct iface of the requested interface, or %NULL if no * interface @ifindex exists. */ struct iface *iface_find_by_index(unsigned int ifindex) { if (ifindex >= num_ifaces) return NULL; return &iface_list[ifindex]; } /** * iface_get_vif - Get virtual interface index for an interface (IPv4) * @iface: Pointer to a @struct iface interface * * Returns: * The virtual interface index if the interface is known and registered * with the kernel, or -1 if no virtual interface exists. */ int iface_get_vif(struct iface *iface) { if (!iface) return -1; return iface->vif; } /** * iface_get_mif - Get virtual interface index for an interface (IPv6) * @iface: Pointer to a @struct iface interface * * Returns: * The virtual interface index if the interface is known and registered * with the kernel, or -1 if no virtual interface exists. */ int iface_get_mif(struct iface *iface __attribute__ ((unused))) { #ifndef HAVE_IPV6_MULTICAST_ROUTING return -1; #else if (!iface) return -1; return iface->mif; #endif /* HAVE_IPV6_MULTICAST_ROUTING */ } /** * iface_get_vif_by_name - Get virtual interface index by interface name (IPv4) * @ifname: Interface name * * Returns: * The virtual interface index if the interface is known and registered * with the kernel, or -1 if no virtual interface by that name is found. */ int iface_get_vif_by_name(const char *ifname) { int vif; struct iface *iface; iface = iface_find_by_name(ifname); if (!iface) return -1; vif = iface_get_vif(iface); if (vif < 0) return -1; return vif; } /** * iface_get_mif_by_name - Get virtual interface index by interface name (IPv6) * @ifname: Interface name * * Returns: * The virtual interface index if the interface is known and registered * with the kernel, or -1 if no virtual interface by that name is found. */ int iface_get_mif_by_name(const char *ifname) { int vif; struct iface *iface; iface = iface_find_by_name(ifname); if (!iface) return -1; vif = iface_get_mif(iface); if (vif < 0) return -1; return vif; } /** * Local Variables: * version-control: t * indent-tabs-mode: t * c-file-style: "linux" * End: */ smcroute-2.0.0/install-sh000077500000000000000000000332551241261621500153660ustar00rootroot00000000000000#!/bin/sh # install - install a program, script, or datafile scriptversion=2011-11-20.07; # UTC # This originates from X11R5 (mit/util/scripts/install.sh), which was # later released in X11R6 (xc/config/util/install.sh) with the # following copyright and license. # # Copyright (C) 1994 X Consortium # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to # deal in the Software without restriction, including without limitation the # rights to use, copy, modify, merge, publish, distribute, sublicense, and/or # sell copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN # AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC- # TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. # # Except as contained in this notice, the name of the X Consortium shall not # be used in advertising or otherwise to promote the sale, use or other deal- # ings in this Software without prior written authorization from the X Consor- # tium. # # # FSF changes to this file are in the public domain. # # Calling this script install-sh is preferred over install.sh, to prevent # 'make' implicit rules from creating a file called install from it # when there is no Makefile. # # This script is compatible with the BSD install script, but was written # from scratch. nl=' ' IFS=" "" $nl" # set DOITPROG to echo to test this script # Don't use :- since 4.3BSD and earlier shells don't like it. doit=${DOITPROG-} if test -z "$doit"; then doit_exec=exec else doit_exec=$doit fi # Put in absolute file names if you don't have them in your path; # or use environment vars. chgrpprog=${CHGRPPROG-chgrp} chmodprog=${CHMODPROG-chmod} chownprog=${CHOWNPROG-chown} cmpprog=${CMPPROG-cmp} cpprog=${CPPROG-cp} mkdirprog=${MKDIRPROG-mkdir} mvprog=${MVPROG-mv} rmprog=${RMPROG-rm} stripprog=${STRIPPROG-strip} posix_glob='?' initialize_posix_glob=' test "$posix_glob" != "?" || { if (set -f) 2>/dev/null; then posix_glob= else posix_glob=: fi } ' posix_mkdir= # Desired mode of installed file. mode=0755 chgrpcmd= chmodcmd=$chmodprog chowncmd= mvcmd=$mvprog rmcmd="$rmprog -f" stripcmd= src= dst= dir_arg= dst_arg= copy_on_change=false no_target_directory= usage="\ Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE or: $0 [OPTION]... SRCFILES... DIRECTORY or: $0 [OPTION]... -t DIRECTORY SRCFILES... or: $0 [OPTION]... -d DIRECTORIES... In the 1st form, copy SRCFILE to DSTFILE. In the 2nd and 3rd, copy all SRCFILES to DIRECTORY. In the 4th, create DIRECTORIES. Options: --help display this help and exit. --version display version info and exit. -c (ignored) -C install only if different (preserve the last data modification time) -d create directories instead of installing files. -g GROUP $chgrpprog installed files to GROUP. -m MODE $chmodprog installed files to MODE. -o USER $chownprog installed files to USER. -s $stripprog installed files. -t DIRECTORY install into DIRECTORY. -T report an error if DSTFILE is a directory. 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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 St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include #include "mclab.h" #define SOCKET_PATH "/var/run/smcroute" /* server's listen socket */ static int server_sd = -1; /* connected server or client socket */ static int client_sd = -1; /** * ipc_server_init - Initialise an IPC server socket * * Returns: * The socket descriptor, or -1 on error with @errno set. */ int ipc_server_init(void) { struct sockaddr_un sa; socklen_t len; if (server_sd >= 0) close(server_sd); server_sd = socket(AF_UNIX, SOCK_STREAM, 0); if (server_sd < 0) return -1; #ifdef HAVE_SOCKADDR_UN_SUN_LEN sa.sun_len = 0; /* <- correct length is set by the OS */ #endif sa.sun_family = AF_UNIX; strcpy(sa.sun_path, SOCKET_PATH); unlink(SOCKET_PATH); len = offsetof(struct sockaddr_un, sun_path) + strlen(SOCKET_PATH); if (bind(server_sd, (struct sockaddr *)&sa, len) < 0 || listen(server_sd, 1)) { int err = errno; close(server_sd); server_sd = -1; errno = err; } return server_sd; } /** * ipc_client_init - Connects to the IPC socket of the server * * Returns: * POSIX OK(0) on success, non-zero on error with @errno set. * Typically %EACCES, %ENOENT, or %ECONREFUSED. */ int ipc_client_init(void) { struct sockaddr_un sa; socklen_t len; if (client_sd >= 0) close(client_sd); client_sd = socket(AF_UNIX, SOCK_STREAM, 0); if (client_sd < 0) return -1; #ifdef HAVE_SOCKADDR_UN_SUN_LEN sa.sun_len = 0; /* <- correct length is set by the OS */ #endif sa.sun_family = AF_UNIX; strcpy(sa.sun_path, SOCKET_PATH); len = offsetof(struct sockaddr_un, sun_path) + strlen(SOCKET_PATH); if (connect(client_sd, (struct sockaddr *)&sa, len) < 0) { int err = errno; close(client_sd); client_sd = -1; errno = err; return -1; } return 0; } /** * ipc_server_read - Read IPC message from client * @buf: Buffer for message * @len: Size of @buf in bytes * * Reads a message from the IPC socket and stores in @buf, respecting * the size @len. Connects and resets connection as necessary. * * Returns: * Pointer to a successfuly read command packet in @buf, or %NULL on error. */ struct cmd *ipc_server_read(uint8 buf[], int len) { size_t size; socklen_t socklen = 0; /* sanity check */ if (server_sd < 0) { errno = EBADF; return NULL; } /* wait for connections */ if (client_sd < 0) { client_sd = accept(server_sd, NULL, &socklen); if (client_sd < 0) return NULL; } size = recv(client_sd, buf, len, 0); if (!size) { close(client_sd); client_sd = -1; errno = ECONNRESET; return NULL; } /* successful read */ if (size >= sizeof(struct cmd)) { struct cmd *p = (struct cmd *)buf; if (size == p->len) return p; } errno = EAGAIN; return NULL; } /** * ipc_send - Send message to peer * @buf: Message to send * @len: Message length in bytes of @buf * * Sends the IPC message in @buf of the size @len to the peer. * * Returns: * Number of bytes successfully sent, or -1 with @errno on failure. */ int ipc_send(const void *buf, int len) { /* sanity check */ if (client_sd < 0) { errno = EBADF; return -1; } if (write(client_sd, buf, len) != len) return -1; return len; } /** * ipc_receive - Receive message from peer * @buf: Buffer to receive message in * @len: Buffer size in bytes * * Waits to receive an IPC message in @buf of max @len bytes from the peer. * * Returns: * Number of bytes successfully received, or -1 with @errno on failure. */ int ipc_receive(uint8 buf[], int len) { /* sanity check */ if (client_sd < 0) { errno = EBADF; return -1; } return read(client_sd, buf, len); } /** * ipc_exit - Tear down and cleanup IPC communication. */ void ipc_exit(void) { if (server_sd >= 0) { close(server_sd); unlink(SOCKET_PATH); } if (client_sd >= 0) close(client_sd); } /** * Local Variables: * version-control: t * indent-tabs-mode: t * c-file-style: "linux" * End: */ smcroute-2.0.0/mcgroup.c000066400000000000000000000122271241261621500151760ustar00rootroot00000000000000/* Multicast group management (join/leave) API * * Copyright (C) 2001-2005 Carsten Schill * Copyright (C) 2006-2009 Julien BLACHE * Copyright (C) 2009 Todd Hayton * Copyright (C) 2009-2011 Micha Lenk * Copyright (C) 2011-2013 Joachim Nilsson * * 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 St, Fifth Floor, Boston, MA 02110-1301 USA */ #include "mclab.h" static int mcgroup4_socket = -1; static struct iface *find_valid_iface(const char *ifname, int cmd) { const char *command = cmd == 'j' ? "Join" : "Leave"; struct iface *iface = iface_find_by_name(ifname); if (!iface) { smclog(LOG_WARNING, 0, "%s multicast group, unknown interface %s", command, ifname); return NULL; } return iface; } static void mcgroup4_init(void) { if (mcgroup4_socket < 0) { mcgroup4_socket = socket(AF_INET, SOCK_DGRAM, 0); if (mcgroup4_socket < 0) smclog(LOG_ERR, errno, "Failed creating IPv4 socket for communicating group membership to kernel"); } } static int mcgroup_join_leave_ipv4(int sd, int cmd, const char *ifname, struct in_addr group) { int joinleave = cmd == 'j' ? IP_ADD_MEMBERSHIP : IP_DROP_MEMBERSHIP; struct ip_mreq mreq; struct iface *iface = find_valid_iface(ifname, cmd); if (!iface) return 1; mreq.imr_multiaddr.s_addr = group.s_addr; mreq.imr_interface.s_addr = iface->inaddr.s_addr; if (setsockopt(sd, IPPROTO_IP, joinleave, (void *)&mreq, sizeof(mreq))) { if (EADDRINUSE != errno) smclog(LOG_WARNING, errno, "%s MEMBERSHIP failed", cmd == 'j' ? "ADD" : "DROP"); return 1; } return 0; } /* * Joins the MC group with the address 'group' on the interface 'ifname'. * The join is bound to the UDP socket 'sd', so if this socket is * closed the membership is dropped. * * returns: - 0 if the function succeeds * - 1 if parameters are wrong or the join fails */ int mcgroup4_join(const char *ifname, struct in_addr group) { mcgroup4_init(); return mcgroup_join_leave_ipv4(mcgroup4_socket, 'j', ifname, group); } /* * Leaves the MC group with the address 'group' on the interface 'ifname'. * * returns: - 0 if the function succeeds * - 1 if parameters are wrong or the join fails */ int mcgroup4_leave(const char *ifname, struct in_addr group) { mcgroup4_init(); return mcgroup_join_leave_ipv4(mcgroup4_socket, 'l', ifname, group); } /* * Close IPv4 multicast socket to kernel to leave any joined groups */ void mcgroup4_disable(void) { if (mcgroup4_socket != -1) { close (mcgroup4_socket); mcgroup4_socket = -1; } } #ifdef HAVE_IPV6_MULTICAST_HOST static int mcgroup6_socket = -1; static void mcgroup6_init(void) { if (mcgroup6_socket < 0) { mcgroup6_socket = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP); if (mcgroup6_socket < 0) smclog(LOG_WARNING, errno, "socket failed"); } } static int mcgroup_join_leave_ipv6(int sd, int cmd, const char *ifname, struct in6_addr group) { int joinleave = cmd == 'j' ? IPV6_JOIN_GROUP : IPV6_LEAVE_GROUP; struct ipv6_mreq mreq; struct iface *iface = find_valid_iface(ifname, cmd); if (!iface) return 1; mreq.ipv6mr_multiaddr = group; mreq.ipv6mr_interface = iface->ifindex; if (setsockopt(sd, IPPROTO_IPV6, joinleave, (void *)&mreq, sizeof(mreq))) { if (EADDRINUSE != errno) smclog(LOG_WARNING, errno, "%s MEMBERSHIP failed", cmd == 'j' ? "ADD" : "DROP"); return 1; } return 0; } /* * Joins the MC group with the address 'group' on the interface 'ifname'. * The join is bound to the UDP socket 'sd', so if this socket is * closed the membership is dropped. * * returns: - 0 if the function succeeds * - 1 if parameters are wrong or the join fails */ int mcgroup6_join(const char *ifname, struct in6_addr group) { mcgroup6_init(); return mcgroup_join_leave_ipv6(mcgroup6_socket, 'j', ifname, group); } /* * Leaves the MC group with the address 'group' on the interface 'ifname'. * * returns: - 0 if the function succeeds * - 1 if parameters are wrong or the join fails */ int mcgroup6_leave(const char *ifname, struct in6_addr group) { mcgroup6_init(); return mcgroup_join_leave_ipv6(mcgroup6_socket, 'l', ifname, group); } #endif /* HAVE_IPV6_MULTICAST_HOST */ /* * Close IPv6 multicast socket to kernel to leave any joined groups */ void mcgroup6_disable(void) { #ifdef HAVE_IPV6_MULTICAST_HOST if (mcgroup6_socket != -1) { close (mcgroup6_socket); mcgroup6_socket = -1; } #endif /* HAVE_IPV6_MULTICAST_HOST */ } /** * Local Variables: * version-control: t * indent-tabs-mode: t * c-file-style: "linux" * End: */ smcroute-2.0.0/mclab.h000066400000000000000000000156251241261621500146120ustar00rootroot00000000000000/* Common include file * * Copyright (C) 2001-2005 Carsten Schill * Copyright (C) 2006-2009 Julien BLACHE * Copyright (C) 2009 Todd Hayton * Copyright (C) 2009-2011 Micha Lenk * Copyright (C) 2011-2013 Joachim Nilsson * * 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 St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "config.h" #ifdef HAVE_LINUX_MROUTE_H #define _LINUX_IN_H /* For Linux <= 2.6.25 */ #include #include #endif #ifdef HAVE_LINUX_MROUTE6_H #include #endif #ifdef HAVE_NET_ROUTE_H #include #endif #ifdef HAVE_NETINET_IP_MROUTE_H #include #endif #ifdef HAVE_NETINET6_IP6_MROUTE_H #ifdef HAVE_SYS_PARAM_H #include #endif #include #endif typedef u_int8_t uint8; typedef u_int16_t uint16; typedef u_int32_t uint32; #define SA(x) ((struct sockaddr *)x) #define SIN4(x) ((struct sockaddr_in *)x) #define SIN6(x) ((struct sockaddr_in6 *)x) #ifndef IN6_IS_ADDR_MULTICAST #define IN6_IS_ADDR_MULTICAST(a) (((__const uint8_t *) (a))[0] == 0xff) #endif #ifndef MIN #define MIN(a, b) ((a) < (b) ? (a) : (b)) #endif #ifndef MAX #define MAX(a, b) ((a) < (b) ? (b) : (a)) #endif /* http://stackoverflow.com/questions/1598773/is-there-a-standard-function-in-c-that-would-return-the-length-of-an-array/1598827#1598827 * Evidently Google uses it in Chromium. It is actually intended to look like 0[arr], read the link, or search the web. */ #define ARRAY_ELEMENTS(arr) ((sizeof(arr)/sizeof(0[arr])) / ((size_t)(!(sizeof(arr) % sizeof(0[arr]))))) struct iface { char name[IFNAMSIZ + 1]; struct in_addr inaddr; /* == 0 for non IP interfaces */ u_short ifindex; /* Physical interface index */ short flags; short vif; short mif; }; extern int do_debug_logging; /* ifvc.c */ #define MAX_IF 40 // max. number of interfaces recognized void iface_init (void); struct iface *iface_find_by_name (const char *ifname); struct iface *iface_find_by_index (unsigned int ifindex); struct iface *iface_find_by_vif (int vif); int iface_get_vif (struct iface *iface); int iface_get_mif (struct iface *iface); int iface_get_vif_by_name (const char *ifname); int iface_get_mif_by_name (const char *ifname); /* mroute-api.c */ /* * IPv4 multicast route */ #define MAX_MC_VIFS MAXVIFS /* from linux/mroute.h */ struct mroute4 { LIST_ENTRY(mroute4) link; struct in_addr sender; struct in_addr group; /* multicast group */ short inbound; /* incoming VIF */ uint8 ttl[MAX_MC_VIFS]; /* outgoing VIFs */ }; typedef struct mroute4 mroute4_t; /* * IPv6 multicast route */ #ifdef HAVE_IPV6_MULTICAST_ROUTING #define MAX_MC_MIFS MAXMIFS /* from linux/mroute6.h */ #else #define MAX_MC_MIFS 1 /* Dummy value for builds w/o IPv6 routing */ #endif struct mroute6 { struct sockaddr_in6 sender; struct sockaddr_in6 group; /* multicast group */ short inbound; /* incoming VIF */ uint8 ttl[MAX_MC_MIFS]; /* outgoing VIFs */ }; typedef struct mroute6 mroute6_t; /* * Generic multicast route (wrapper for IPv4/IPv6 mroute) */ struct mroute { int version; /* 4 or 6 */ union { mroute4_t mroute4; mroute6_t mroute6; } u; }; typedef struct mroute mroute_t; /* * Raw IGMP socket used as interface for the IPv4 mrouted API. * Receives IGMP packets and upcall messages from the kernel. */ extern int mroute4_socket; /* * Raw ICMPv6 socket used as interface for the IPv6 mrouted API. * Receives MLD packets and upcall messages from the kenrel. */ extern int mroute6_socket; int mroute4_enable (void); void mroute4_disable (void); int mroute4_dyn_add (mroute4_t *mroute); int mroute4_add (mroute4_t *mroute); int mroute4_del (mroute4_t *mroute); int mroute6_enable (void); void mroute6_disable (void); int mroute6_add (mroute6_t *mroute); int mroute6_del (mroute6_t *mroute); /* ipc.c */ int ipc_server_init (void); struct cmd *ipc_server_read (uint8 buf[], int len); int ipc_client_init (void); int ipc_send (const void *buf, int len); int ipc_receive (uint8 buf[], int len); void ipc_exit (void); /* cmdpkt.c * * XXX: Add example packet layouts */ struct cmd { size_t len; /* total size of packet including cmd header */ uint16 cmd; /* 'a'=Add,'r'=Remove,'j'=Join,'l'=Leave,'k'=Kill */ uint16 count; /* command argument count */ char *argv[0]; /* 'count' * '\0' terminated strings + '\0' */ }; #define MX_CMDPKT_SZ 1024 /* command size including appended strings */ void *cmd_build (char cmd, const char *argv[], int count); const char *cmd_convert_to_mroute (mroute_t *mroute, const struct cmd *packet); const char *cmd_convert_to_mroute4 (mroute4_t *mroute, const struct cmd *packet); const char *cmd_convert_to_mroute6 (mroute6_t *mroute, const struct cmd *packet); /* mcgroup.c */ int mcgroup4_join (const char *ifname, struct in_addr group); int mcgroup4_leave (const char *ifname, struct in_addr group); void mcgroup4_disable (void); int mcgroup6_join (const char *ifname, struct in6_addr group); int mcgroup6_leave (const char *ifname, struct in6_addr group); void mcgroup6_disable (void); /* syslog.c */ #define LOG_INIT 10 extern int log_stderr; /* Log threshold for stderr, LOG_WARNING .... LOG_DEBUG */ extern int log_last_severity; /* last logged serverity */ extern int log_last_error; /* last logged errno value */ extern char log_last_message[128]; /* last logged message */ void smclog(int severity, int code, const char *fmt, ...); /* parse-conf.c */ int parse_conf_file(const char *file); /* pidfile.c */ int pidfile(const char *basename); /** * Local Variables: * version-control: t * indent-tabs-mode: t * c-file-style: "linux" * End: */ smcroute-2.0.0/mcsender.8000066400000000000000000000035561241261621500152540ustar00rootroot00000000000000.\" Hey, EMACS: -*- nroff -*- .TH MCSENDER 8 "August 08, 2011" .\" Please adjust this date whenever revising the manpage. .\" .\" Some roff macros, for reference: .\" .nh disable hyphenation .\" .hy enable hyphenation .\" .ad l left justify .\" .ad b justify to both left and right margins .\" .nf disable filling .\" .fi enable filling .\" .br insert line break .\" .sp insert n+1 empty lines .\" for manpage-specific macros, see man(7) .SH NAME mcsender \- Multicast test tool to send multicast test packets .SH SYNOPSIS .B mcsender \fP[\fB-t\fP\fI\fP] \fP[\fB-i\fP\fI\fP] \fBip:port\fP .SH DESCRIPTION \fBmcsender\fP sends multicast packets to the specified IPv4 or IPv6 multicast address and port. The packets sent contain the string "this is the test message from mclab/mcsender\\n". .SH OPTIONS .TP .B -t\fI\fP Set the TTL (or hop limit for IPv6) to the specified value. .TP .B -i\fI\fP Specify the interface to use for outgoing multicast datagrams. .SH EXAMPLES To send datagrams to IPv4 multicast address 239.1.1.1 and port 12345 with a TTL of 3: $ mcsender -t3 239.1.1.1:12345 To send datagrams to IPv4 multicast address 239.1.1.1 and port 12345 with a TTL of 3 out of interface eth1: $ mcsender -ieth1 -t3 239.1.1.1:12345 To send datagrams to IPv6 multicast address ff15::1 and port 12345 with a hop limit of 3: $ mcsender -t3 ff15::1:12345 To send datagrams to IPv6 multicast address ff15::1 and port 12345 with a hop limit of 3 out of interface eth1: $ mcsender -ieth1 -t3 ff15::1:12345 .SH AUTHOR mcsender was written by Carsten Schill . .PP Support for IPv6 was added by Todd Hayton . .PP This manual page was written by Julien BLACHE , for the Debian project (but may be used by others). smcroute-2.0.0/mcsender.c000066400000000000000000000127251241261621500153250ustar00rootroot00000000000000/* Multicast test tool * * Copyright (C) 2001-2005 Carsten Schill * Copyright (C) 2006-2009 Julien BLACHE * Copyright (C) 2009 Todd Hayton * Copyright (C) 2009-2011 Micha Lenk * Copyright (C) 2011-2013 Joachim Nilsson * * 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 St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include "mclab.h" int do_debug_logging = 0; static const char Usage[] = "mcsender [-t] [-i] \n"; static const char McMsg[] = "this is the test message from mclab/mcsender\n"; static void usage(void); static void SetOif4(int, char *); static void SetTtl4(int, unsigned); static void SetOif6(int, char *); static void SetTtl6(int, unsigned); static void getSockAdr(struct sockaddr *SaPt, socklen_t * SaLenPt, char *AddrSt, char *PortSt); int main(int ArgCn, char *ArgVc[]) { unsigned TtlVal = 0; char *OifVal = NULL; char *AddrSt = NULL; char *PortSt = NULL; char *Pt; void (*SetTtl) (int, unsigned) = NULL; void (*SetOif) (int, char *) = NULL; struct sockaddr_storage TarAdr; socklen_t TarAdrLen = 0; if (ArgCn < 2) { usage(); exit(1); } while (*++ArgVc) { Pt = *ArgVc; /* option */ if (*Pt == '-') { switch (*++Pt) { case 'D': do_debug_logging = 1; break; case 't': if (sscanf(Pt + 1, " %3u", &TtlVal) != 1 || TtlVal < 1) { usage(); exit(1); } break; case 'i': OifVal = Pt + 1; break; default: usage(); exit(1); } } else { /* argument */ memset(&TarAdr, 0, sizeof(TarAdr)); AddrSt = Pt; Pt = strrchr(AddrSt, ':'); if (Pt == NULL) { usage(); exit(1); } *Pt++ = '\0'; PortSt = Pt; getSockAdr(SA(&TarAdr), &TarAdrLen, AddrSt, PortSt); SetTtl = (TarAdr.ss_family == AF_INET) ? SetTtl4 : SetTtl6; SetOif = (TarAdr.ss_family == AF_INET) ? SetOif4 : SetOif6; } } if (TarAdrLen) { int UdpSock = socket(TarAdr.ss_family, SOCK_DGRAM, IPPROTO_UDP); if (UdpSock < 0) smclog(LOG_ERR, errno, "UDP socket open"); if (TtlVal) (*SetTtl) (UdpSock, TtlVal); if (OifVal) (*SetOif) (UdpSock, OifVal); while (1) { if (sendto(UdpSock, McMsg, sizeof(McMsg), 0, SA(&TarAdr), TarAdrLen) != sizeof(McMsg)) smclog(LOG_WARNING, errno, "send to UDP socket"); sleep(1); } } return 0; } static void usage(void) { fprintf(stderr, "Usage: %s\n", Usage); } static void SetTtl4(int Sock, unsigned Ttl) { if (setsockopt(Sock, IPPROTO_IP, IP_MULTICAST_TTL, &Ttl, sizeof(Ttl))) smclog(LOG_ERR, errno, "set IP_MULTICAST_TTL"); } static void SetOif4(int Sock, char *ifname) { struct ifreq IfReq; struct sockaddr_in *Sin4 = NULL; memset(&IfReq, 0, sizeof(IfReq)); strncpy(IfReq.ifr_name, ifname, sizeof(IfReq.ifr_name)); if (ioctl(Sock, SIOCGIFADDR, &IfReq) < 0) smclog(LOG_ERR, errno, "ioctl SIOCGIFADDR"); switch (IfReq.ifr_addr.sa_family) { case AF_INET: Sin4 = SIN4(&IfReq.ifr_addr); break; default: fprintf(stderr, "SetOif4 - invalid address family: %d\n", IfReq.ifr_addr.sa_family); exit(1); } if (setsockopt(Sock, IPPROTO_IP, IP_MULTICAST_IF, &Sin4->sin_addr, sizeof(struct in_addr))) smclog(LOG_ERR, errno, "set IP_MULTICAST_IF"); } static void SetTtl6(int Sock, unsigned Ttl) { if (setsockopt(Sock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &Ttl, sizeof(Ttl))) smclog(LOG_ERR, errno, "set IPV6_MULTICAST_HOPS"); } static void SetOif6(int Sock, char *ifname) { unsigned ifindex; ifindex = if_nametoindex(ifname); if (setsockopt(Sock, IPPROTO_IPV6, IPV6_MULTICAST_IF, &ifindex, sizeof(ifindex))) smclog(LOG_ERR, errno, "set IPV6_MULTICAST_IF"); } /* * Converts the internet address plus port string in 'St' * into their network byte order representations. * * returns: - 0 -> conversion failed * - 1 -> only address part returned (inaddrPt) * - 2 -> address and port returned * */ static void getSockAdr(struct sockaddr *SaPt, socklen_t * SaLenPt, char *AddrSt, char *PortSt) { struct sockaddr_in *Sin4; struct sockaddr_in6 *Sin6; if (strchr(AddrSt, ':') == NULL) { Sin4 = SIN4(SaPt); memset(Sin4, 0, sizeof(*Sin4)); Sin4->sin_family = AF_INET; Sin4->sin_port = htons(atoi(PortSt)); if (inet_pton(AF_INET, AddrSt, &Sin4->sin_addr) <= 0) smclog(LOG_ERR, errno, "inet_pton failed for address %s", AddrSt); *SaLenPt = sizeof(struct sockaddr_in); } else { Sin6 = SIN6(SaPt); memset(Sin6, 0, sizeof(*Sin6)); Sin6->sin6_family = AF_INET6; Sin6->sin6_port = htons(atoi(PortSt)); if (inet_pton(AF_INET6, AddrSt, &Sin6->sin6_addr) <= 0) smclog(LOG_ERR, errno, "inet_pton failed for address %s", AddrSt); *SaLenPt = sizeof(struct sockaddr_in6); } } /** * Local Variables: * version-control: t * indent-tabs-mode: t * c-file-style: "linux" * End: */ smcroute-2.0.0/missing000077500000000000000000000153301241261621500147530ustar00rootroot00000000000000#! /bin/sh # Common wrapper for a few potentially missing GNU programs. scriptversion=2013-10-28.13; # UTC # Copyright (C) 1996-2013 Free Software Foundation, Inc. # Originally written by Fran,cois Pinard , 1996. # 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, 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. 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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 St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include "config.h" #include "mclab.h" #ifdef HAVE_NETINET6_IP6_MROUTE_H #include #endif /* MAX_MC_VIFS from mclab.h must have same value as MAXVIFS from mroute.h */ #if MAX_MC_VIFS != MAXVIFS #error "IPv4 constants don't match, mclab.h needs to be fixed!" #endif #ifdef HAVE_IPV6_MULTICAST_ROUTING /* MAX_MC_MIFS from mclab.h must have same value as MAXVIFS from mroute6.h */ #if MAX_MC_MIFS != MAXMIFS #error "IPv6 constants don't match, mclab.h needs to be fixed!" #endif #endif /* Used for (*,G) matches */ #define mroute4_match(r1, r2) (!memcmp(&(r1)->group, &(r2)->group, sizeof((r1)->group)) && (r1)->inbound == (r2)->inbound) /* * Need a raw IGMP socket as interface for the IPv4 mrouted API * Receives IGMP packets and kernel upcall messages. */ int mroute4_socket = -1; /* All user added/configured (*,G) routes that are matched on-demand * at runtime. See the mroute4_dyn_list for the actual (S,G) routes * set from this "template". */ LIST_HEAD(, mroute4) mroute4_conf_list = LIST_HEAD_INITIALIZER(); /* For dynamically/on-demand set (S,G) routes that we must track * if the user removes the configured (*,G) route. */ LIST_HEAD(, mroute4) mroute4_dyn_list = LIST_HEAD_INITIALIZER(); #ifdef HAVE_IPV6_MULTICAST_ROUTING /* * Need a raw ICMPv6 socket as interface for the IPv6 mrouted API * Receives MLD packets and kernel upcall messages. */ int mroute6_socket = -1; #endif /* IPv4 internal virtual interfaces (VIF) descriptor vector */ static struct { struct iface *iface; } vif_list[MAXVIFS]; static int mroute4_add_vif(struct iface *iface); #ifdef HAVE_IPV6_MULTICAST_ROUTING /* IPv6 internal virtual interfaces (VIF) descriptor vector */ static struct mif { struct iface *iface; } mif_list[MAXMIFS]; static int mroute6_add_mif(struct iface *iface); #endif /** * mroute4_enable - Initialise IPv4 multicast routing * * Setup the kernel IPv4 multicast routing API and lock the multicast * routing socket to this program (only!). * * Returns: * POSIX OK(0) on success, non-zero on error with @errno set. */ int mroute4_enable(void) { int arg = 1; unsigned int i; struct iface *iface; mroute4_socket = socket(AF_INET, SOCK_RAW, IPPROTO_IGMP); if (mroute4_socket < 0) { if (ENOPROTOOPT == errno) smclog(LOG_WARNING, 0, "Kernel does not support IPv4 multicast routing, skipping ..."); return -1; } if (setsockopt(mroute4_socket, IPPROTO_IP, MRT_INIT, (void *)&arg, sizeof(arg))) { switch (errno) { case EADDRINUSE: smclog(LOG_INIT, errno, "IPv4 multicast routing API already in use"); break; default: smclog(LOG_INIT, errno, "Failed initializing IPv4 multicast routing API"); break; } close(mroute4_socket); mroute4_socket = -1; return -1; } /* Initialize virtual interface table */ memset(&vif_list, 0, sizeof(vif_list)); /* Create virtual interfaces, VIFs, for all non-loopback interfaces * that have a valid IPv4 address. */ for (i = 0; (iface = iface_find_by_index(i)); i++) { if (iface->flags & IFF_LOOPBACK || iface->inaddr.s_addr == INADDR_ANY) { iface->vif = -1; continue; } /* No point in continuing the loop when out of VIF's */ if (mroute4_add_vif(iface)) break; } LIST_INIT(&mroute4_conf_list); LIST_INIT(&mroute4_dyn_list); return 0; } /** * mroute4_disable - Disable IPv4 multicast routing * * Disable IPv4 multicast routing and release kernel routing socket. */ void mroute4_disable(void) { mroute4_t *entry; if (mroute4_socket < 0) return; /* Drop all kernel routes set by smcroute */ if (setsockopt(mroute4_socket, IPPROTO_IP, MRT_DONE, NULL, 0)) smclog(LOG_WARNING, errno, "Failed shutting down IPv4 multicast routing socket."); close(mroute4_socket); mroute4_socket = -1; /* Free list of (*,G) routes on SIGHUP */ while (!LIST_EMPTY(&mroute4_conf_list)) { entry = LIST_FIRST(&mroute4_conf_list); LIST_REMOVE(entry, link); free(entry); } while (!LIST_EMPTY(&mroute4_dyn_list)) { entry = LIST_FIRST(&mroute4_dyn_list); LIST_REMOVE(entry, link); free(entry); } } /* Create a virtual interface from @iface so it can be used for IPv4 multicast routing. */ static int mroute4_add_vif(struct iface *iface) { struct vifctl vc; int vif = -1; size_t i; /* search free vif */ for (i = 0; i < ARRAY_ELEMENTS(vif_list); i++) { if (!vif_list[i].iface) { vif = i; break; } } /* no more space */ if (vif == -1) { smclog(LOG_WARNING, ENOMEM, "Kernel MAXVIFS (%d) too small for number of interfaces", MAXVIFS); return 1; } memset(&vc, 0, sizeof(vc)); vc.vifc_vifi = vif; vc.vifc_flags = 0; /* no tunnel, no source routing, register ? */ vc.vifc_threshold = 1; /* Packet TTL must be at least 1 to pass them */ vc.vifc_rate_limit = 0; /* hopefully no limit */ vc.vifc_lcl_addr.s_addr = iface->inaddr.s_addr; vc.vifc_rmt_addr.s_addr = INADDR_ANY; smclog(LOG_DEBUG, 0, "Iface %s => VIF %d index %d flags 0x%04x", iface->name, vc.vifc_vifi, iface->ifindex, vc.vifc_flags); if (setsockopt(mroute4_socket, IPPROTO_IP, MRT_ADD_VIF, (void *)&vc, sizeof(vc))) smclog(LOG_ERR, errno, "Failed adding VIF for iface %s", iface->name); iface->vif = vif; vif_list[vif].iface = iface; return 0; } /* Actually set in kernel - called by mroute4_add() and mroute4_check_add() */ static int __mroute4_add (mroute4_t *route) { int result = 0; char origin[INET_ADDRSTRLEN], group[INET_ADDRSTRLEN]; struct mfcctl mc; memset(&mc, 0, sizeof(mc)); mc.mfcc_origin = route->sender; mc.mfcc_mcastgrp = route->group; mc.mfcc_parent = route->inbound; /* copy the TTL vector */ if (sizeof(mc.mfcc_ttls[0]) != sizeof(route->ttl[0]) || ARRAY_ELEMENTS(mc.mfcc_ttls) != ARRAY_ELEMENTS(route->ttl)) smclog(LOG_ERR, 0, "Critical data type validation error in %s!", __FILE__); memcpy(mc.mfcc_ttls, route->ttl, ARRAY_ELEMENTS(mc.mfcc_ttls) * sizeof(mc.mfcc_ttls[0])); smclog(LOG_DEBUG, 0, "Add %s -> %s from VIF %d", inet_ntop(AF_INET, &mc.mfcc_origin, origin, INET_ADDRSTRLEN), inet_ntop(AF_INET, &mc.mfcc_mcastgrp, group, INET_ADDRSTRLEN), mc.mfcc_parent); if (setsockopt(mroute4_socket, IPPROTO_IP, MRT_ADD_MFC, (void *)&mc, sizeof(mc))) { result = errno; smclog(LOG_WARNING, errno, "Failed adding IPv4 multicast route"); } return result; } /* Actually remove from kernel - called by mroute4_del() */ static int __mroute4_del (mroute4_t *route) { int result = 0; char origin[INET_ADDRSTRLEN], group[INET_ADDRSTRLEN]; struct mfcctl mc; memset(&mc, 0, sizeof(mc)); mc.mfcc_origin = route->sender; mc.mfcc_mcastgrp = route->group; smclog(LOG_DEBUG, 0, "Del %s -> %s", inet_ntop(AF_INET, &mc.mfcc_origin, origin, INET_ADDRSTRLEN), inet_ntop(AF_INET, &mc.mfcc_mcastgrp, group, INET_ADDRSTRLEN)); if (setsockopt(mroute4_socket, IPPROTO_IP, MRT_DEL_MFC, (void *)&mc, sizeof(mc))) { result = errno; smclog(LOG_WARNING, errno, "Failed removing IPv4 multicast route"); } return result; } /** * mroute4_dyn_add - Add route to kernel if it matches a known (*,G) route. * @route: Pointer to candidate &mroute4_t IPv4 multicast route * * Returns: * POSIX OK(0) on success, non-zero on error with @errno set. */ int mroute4_dyn_add(mroute4_t *route) { mroute4_t *entry; LIST_FOREACH(entry, &mroute4_conf_list, link) { /* Find matching (*,G) ... and interface. */ if (mroute4_match(entry, route)) { /* Use configured template (*,G) outbound interfaces. */ memcpy(route->ttl, entry->ttl, ARRAY_ELEMENTS(route->ttl) * sizeof(route->ttl[0])); /* Add to list of dynamically added routes. Necessary if the user * removes the (*,G) using the command line interface rather than * updating the conf file and SIGHUP. Note: if we fail to alloc() * memory we don't do anything, just add kernel route silently. */ entry = malloc(sizeof(mroute4_t)); if (entry) { memcpy(entry, route, sizeof(mroute4_t)); LIST_INSERT_HEAD(&mroute4_dyn_list, entry, link); } return __mroute4_add(route); } } errno = ENOENT; return -1; } /** * mroute4_add - Add route to kernel, or save a wildcard route for later use * @route: Pointer to &mroute4_t IPv4 multicast route to add * * Adds the given multicast @route to the kernel multicast routing table * unless the source IP is %INADDR_ANY, i.e., a (*,G) route. Those we * save for and check against at runtime when the kernel signals us. * * Returns: * POSIX OK(0) on success, non-zero on error with @errno set. */ int mroute4_add(mroute4_t *route) { /* For (*,G) we save to a linked list to be added on-demand * when the kernel sends IGMPMSG_NOCACHE. */ if (route->sender.s_addr == INADDR_ANY) { mroute4_t *entry = malloc(sizeof(mroute4_t)); if (!entry) { smclog(LOG_WARNING, errno, "Failed adding (*,G) multicast route"); return errno; } memcpy(entry, route, sizeof(mroute4_t)); LIST_INSERT_HEAD(&mroute4_conf_list, entry, link); return 0; } return __mroute4_add (route); } /** * mroute4_del - Remove route from kernel * @route: Pointer to &mroute4_t IPv4 multicast route to remove * * Removes the given multicast @route from the kernel multicast routing * table. * * Returns: * POSIX OK(0) on success, non-zero on error with @errno set. */ int mroute4_del(mroute4_t *route) { mroute4_t *entry, *set; /* For (*,G) we have saved all dynamically added kernel routes * to a linked list which we need to traverse again and remove * all matches. From kernel dyn list before we remove the conf * entry. */ if (route->sender.s_addr != INADDR_ANY) return __mroute4_del(route); if (LIST_EMPTY(&mroute4_conf_list)) return 0; entry = LIST_FIRST(&mroute4_conf_list); while (entry) { /* Find matching (*,G) ... and interface. */ if (mroute4_match(entry, route)) { if (LIST_EMPTY(&mroute4_dyn_list)) { entry = LIST_NEXT(entry, link); continue; } set = LIST_FIRST(&mroute4_dyn_list); while (set) { if (mroute4_match(entry, set)) { __mroute4_del(set); LIST_REMOVE(set, link); free(set); set = LIST_FIRST(&mroute4_dyn_list); continue; } set = LIST_NEXT(set, link); } LIST_REMOVE(entry, link); free(entry); entry = LIST_FIRST(&mroute4_conf_list); continue; } entry = LIST_NEXT(entry, link); } return 0; } #ifdef HAVE_IPV6_MULTICAST_ROUTING #ifdef __linux__ #define IPV6_ALL_MC_FORWARD "/proc/sys/net/ipv6/conf/all/mc_forwarding" static int proc_set_val(char *file, int val) { int fd, result = 0; fd = open(file, O_WRONLY); if (fd < 0) return 1; if (-1 == write(fd, "1", val)) result = 1; close(fd); return result; } #endif /* Linux only */ #endif /* HAVE_IPV6_MULTICAST_ROUTING */ /** * mroute6_enable - Initialise IPv6 multicast routing * * Setup the kernel IPv6 multicast routing API and lock the multicast * routing socket to this program (only!). * * Returns: * POSIX OK(0) on success, non-zero on error with @errno set. */ int mroute6_enable(void) { #ifndef HAVE_IPV6_MULTICAST_ROUTING return -1; #else int arg = 1; unsigned int i; struct iface *iface; if ((mroute6_socket = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0) { if (ENOPROTOOPT == errno) smclog(LOG_WARNING, 0, "Kernel does not support IPv6 multicast routing, skipping ..."); return -1; } if (setsockopt(mroute6_socket, IPPROTO_IPV6, MRT6_INIT, (void *)&arg, sizeof(arg))) { switch (errno) { case EADDRINUSE: smclog(LOG_INIT, errno, "IPv6 multicast routing API already in use"); break; default: smclog(LOG_INIT, errno, "Failed initializing IPv6 multicast routing API"); break; } close(mroute6_socket); mroute6_socket = -1; return -1; } /* Initialize virtual interface table */ memset(&mif_list, 0, sizeof(mif_list)); #ifdef __linux__ /* On Linux pre 2.6.29 kernels net.ipv6.conf.all.mc_forwarding * is not set on MRT6_INIT so we have to do this manually */ if (proc_set_val(IPV6_ALL_MC_FORWARD, 1)) { if (errno != EACCES) smclog(LOG_ERR, errno, "Failed enabling IPv6 multicast forwarding"); } #endif /* Create virtual interfaces, IPv6 MIFs, for all non-loopback interfaces */ for (i = 0; (iface = iface_find_by_index(i)); i++) { if (iface->flags & IFF_LOOPBACK) { iface->vif = -1; continue; } /* No point in continuing the loop when out of MIF's */ if (mroute6_add_mif(iface)) break; } return 0; #endif /* HAVE_IPV6_MULTICAST_ROUTING */ } /** * mroute6_disable - Disable IPv6 multicast routing * * Disable IPv6 multicast routing and release kernel routing socket. */ void mroute6_disable(void) { #ifdef HAVE_IPV6_MULTICAST_ROUTING if (mroute6_socket < 0) return; if (setsockopt(mroute6_socket, IPPROTO_IPV6, MRT6_DONE, NULL, 0)) smclog(LOG_WARNING, errno, "Failed shutting down IPv6 multicast routing socket."); close(mroute6_socket); mroute6_socket = -1; #endif /* HAVE_IPV6_MULTICAST_ROUTING */ } #ifdef HAVE_IPV6_MULTICAST_ROUTING /* Create a virtual interface from @iface so it can be used for IPv6 multicast routing. */ static int mroute6_add_mif(struct iface *iface) { struct mif6ctl mc; int mif = -1; size_t i; /* find a free mif */ for (i = 0; i < ARRAY_ELEMENTS(mif_list); i++) { if (!mif_list[i].iface) { mif = i; break; } } /* no more space */ if (mif == -1) { smclog(LOG_WARNING, ENOMEM, "Kernel MAXMIFS (%d) too small for number of interfaces", MAXMIFS); return 1; } memset(&mc, 0, sizeof(mc)); mc.mif6c_mifi = mif; mc.mif6c_flags = 0; /* no register */ #ifdef HAVE_MIF6CTL_VIFC_THRESHOLD mc.vifc_threshold = 1; /* Packet TTL must be at least 1 to pass them */ #endif mc.mif6c_pifi = iface->ifindex; /* physical interface index */ #ifdef HAVE_MIF6CTL_VIFC_RATE_LIMIT mc.vifc_rate_limit = 0; /* hopefully no limit */ #endif smclog(LOG_DEBUG, 0, "Iface %s => MIF %d index %d flags 0x%04x", iface->name, mc.mif6c_mifi, mc.mif6c_pifi, mc.mif6c_flags); if (setsockopt(mroute6_socket, IPPROTO_IPV6, MRT6_ADD_MIF, (void *)&mc, sizeof(mc))) smclog(LOG_ERR, errno, "Failed adding MIF for iface %s", iface->name); iface->mif = mif; mif_list[mif].iface = iface; return 0; } /** * mroute6_add - Add route to kernel, or save a wildcard route for later use * @route: Pointer to &mroute6_t IPv6 multicast route to add * * Adds the given multicast @route to the kernel multicast routing table. * * Returns: * POSIX OK(0) on success, non-zero on error with @errno set. */ int mroute6_add(mroute6_t *route) { int result = 0; size_t i; char origin[INET6_ADDRSTRLEN], group[INET6_ADDRSTRLEN]; struct mf6cctl mc; memset(&mc, 0, sizeof(mc)); mc.mf6cc_origin = route->sender; mc.mf6cc_mcastgrp = route->group; mc.mf6cc_parent = route->inbound; /* copy the outgoing MIFs */ for (i = 0; i < ARRAY_ELEMENTS(route->ttl); i++) { if (route->ttl[i] > 0) IF_SET(i, &mc.mf6cc_ifset); } smclog(LOG_DEBUG, 0, "Add %s -> %s from MIF %d", inet_ntop(AF_INET6, &mc.mf6cc_origin.sin6_addr, origin, INET6_ADDRSTRLEN), inet_ntop(AF_INET6, &mc.mf6cc_mcastgrp.sin6_addr, group, INET6_ADDRSTRLEN), mc.mf6cc_parent); if (setsockopt(mroute6_socket, IPPROTO_IPV6, MRT6_ADD_MFC, (void *)&mc, sizeof(mc))) { result = errno; smclog(LOG_WARNING, errno, "Failed adding IPv6 multicast route"); } return result; } /** * mroute6_del - Remove route from kernel * @route: Pointer to &mroute6_t IPv6 multicast route to remove * * Removes the given multicast @route from the kernel multicast routing * table. * * Returns: * POSIX OK(0) on success, non-zero on error with @errno set. */ int mroute6_del(mroute6_t *route) { int result = 0; char origin[INET6_ADDRSTRLEN], group[INET6_ADDRSTRLEN]; struct mf6cctl mc; memset(&mc, 0, sizeof(mc)); mc.mf6cc_origin = route->sender; mc.mf6cc_mcastgrp = route->group; smclog(LOG_DEBUG, 0, "Del %s -> %s", inet_ntop(AF_INET6, &mc.mf6cc_origin.sin6_addr, origin, INET6_ADDRSTRLEN), inet_ntop(AF_INET6, &mc.mf6cc_mcastgrp.sin6_addr, group, INET6_ADDRSTRLEN)); if (setsockopt(mroute6_socket, IPPROTO_IPV6, MRT6_DEL_MFC, (void *)&mc, sizeof(mc))) { result = errno; smclog(LOG_WARNING, errno, "Failed removing IPv6 multicast route"); } return result; } #endif /* HAVE_IPV6_MULTICAST_ROUTING */ /** * Local Variables: * version-control: t * indent-tabs-mode: t * c-file-style: "linux" * End: */ smcroute-2.0.0/parse-conf.c000066400000000000000000000200001241261621500155430ustar00rootroot00000000000000/* Simple .conf file parser for smcroute * * Copyright (c) 2011-2013 Joachim Nilsson * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #ifndef UNITTEST #include "mclab.h" #endif #define MAX_LINE_LEN 512 static char *pop_token(char **line) { char *end, *token; if (!line) return NULL; token = *line; if (!token) return NULL; /* Find start of token, skip whitespace. */ while (*token && isspace(*token)) token++; /* Find end of token. */ end = token; while (*end && !isspace(*end)) end++; if (*end == 0 || end == token) { *line = NULL; return NULL; } *end = 0; /* Terminate token. */ *line = end + 1; return token; } static int match(char *keyword, char *token) { size_t len; if (!keyword || !token) return 0; len = strlen(keyword); return !strncmp(keyword, token, len); } static int join_mgroup (int lineno, char *ifname, char *group) { int result; if (!ifname || !group) { errno = EINVAL; return 1; } if (strchr(group, ':')) { #if !defined(HAVE_IPV6_MULTICAST_HOST) || !defined(HAVE_IPV6_MULTICAST_ROUTING) smclog(LOG_WARNING, 0, "%02: Ignored, IPv6 disabled.", lineno); result = 0; #else struct in6_addr grp; if (inet_pton(AF_INET6, group, &grp) <= 0 || !IN6_IS_ADDR_MULTICAST(&grp)) { smclog(LOG_WARNING, 0, "%02d: Invalid IPv6 multicast group: %s", lineno, group); return 1; } result = mcgroup6_join(ifname, grp); #endif } else { struct in_addr grp; if ((inet_pton(AF_INET, group, &grp) <= 0) || !IN_MULTICAST(ntohl(grp.s_addr))) { smclog(LOG_WARNING, 0, "%02d: Invalid IPv4 multicast group: %s", lineno, group); return 1; } result = mcgroup4_join(ifname, grp); } return result; } static int add_mroute (int lineno, char *ifname, char *group, char *source, char *outbound[], int num) { int i, total, result; if (!ifname || !group || !outbound || !num) { errno = EINVAL; return 1; } if (strchr(group, ':')) { #if !defined(HAVE_IPV6_MULTICAST_HOST) || !defined(HAVE_IPV6_MULTICAST_ROUTING) smclog(LOG_WARNING, 0, "%02: Ignored, IPv6 disabled.", lineno); result = 0; #else mroute6_t mroute; memset(&mroute, 0, sizeof(mroute)); mroute.inbound = iface_get_mif_by_name(ifname); if (mroute.inbound < 0) { smclog(LOG_WARNING, 0, "%02d: Invalid inbound IPv6 interface: %s", lineno, ifname); return 1; } if (!source || inet_pton(AF_INET6, source, &mroute.sender.sin6_addr) <= 0) { smclog(LOG_WARNING, 0, "%02d: Invalid source IPv6 address: %s", lineno, source ?: "NONE"); return 1; } if (inet_pton(AF_INET6, group, &mroute.group.sin6_addr) <= 0 || !IN6_IS_ADDR_MULTICAST(&mroute.group.sin6_addr)) { smclog(LOG_WARNING, 0, "%02d: Invalid IPv6 multicast group: %s", lineno, group); return 1; } total = num; for (i = 0; i < num; i++) { int mif = iface_get_mif_by_name(outbound[i]); if (mif < 0) { total--; smclog(LOG_WARNING, 0, "%02d: Invalid outbound IPv6 interface: %s", lineno, outbound[i]); continue; /* Try next, if any. */ } if (mif == mroute.inbound) smclog(LOG_WARNING, 0, "%02d: Same outbound IPv6 interface (%s) as inbound (%s)?", lineno, outbound[i], ifname); mroute.ttl[mif] = 1; /* Use a TTL threshold to indicate the list of outbound interfaces. */ } if (!total) { smclog(LOG_WARNING, 0, "%02d: No valid outbound interfaces, skipping multicast route.", lineno); result = 1; } else { result = mroute6_add(&mroute); } #endif } else { struct mroute4 mroute; memset(&mroute, 0, sizeof(mroute)); mroute.inbound = iface_get_vif_by_name(ifname); if (mroute.inbound < 0) { smclog(LOG_WARNING, 0, "%02d: Invalid inbound IPv4 interface: %s", lineno, ifname); return 1; } if (!source) { mroute.sender.s_addr = INADDR_ANY; } else if (inet_pton(AF_INET, source, &mroute.sender) <= 0) { smclog(LOG_WARNING, 0, "%02d: Invalid source IPv4 address: %s", lineno, source); return 1; } if ((inet_pton(AF_INET, group, &mroute.group) <= 0) || !IN_MULTICAST(ntohl(mroute.group.s_addr))) { smclog(LOG_WARNING, 0, "%02d: Invalid IPv4 multicast group: %s", lineno, group); return 1; } total = num; for (i = 0; i < num; i++) { int vif = iface_get_vif_by_name(outbound[i]); if (vif < 0) { total--; smclog(LOG_WARNING, 0, "%02d: Invalid outbound IPv4 interface: %s", lineno, outbound[i]); continue; /* Try next, if any. */ } if (vif == mroute.inbound) smclog(LOG_WARNING, 0, "%02d: Same outbound IPv4 interface (%s) as inbound (%s)?", lineno, outbound[i], ifname); mroute.ttl[vif] = 1; /* Use a TTL threshold to indicate the list of outbound interfaces. */ } if (!total) { smclog(LOG_WARNING, 0, "%02d: No valid outbound IPv4 interfaces, skipping multicast route.", lineno); result = 1; } else { result = mroute4_add(&mroute); } } return result; } /** * parse_conf_file - Parse smcroute.conf * @file: File name to parse * * This function parses the given @file according to the below format rules. * Joins multicast groups and creates multicast routes accordingly in the * kernel. * * Format: * mgroup from IFNAME group MCGROUP * mroute from IFNAME source ADDRESS group MCGROUP to IFNAME [IFNAME ...] */ int parse_conf_file(const char *file) { int lineno = 1; char *linebuf, *line; FILE *fp = fopen(file, "r"); if (!fp) return 1; linebuf = malloc(MAX_LINE_LEN * sizeof(char)); if (!linebuf) { int tmp = errno; fclose(fp); errno = tmp; return 1; } while ((line = fgets(linebuf, MAX_LINE_LEN, fp))) { char *token; char *ifname = NULL; char *source = NULL; char *group = NULL; int op = 0, num = 0; char *dest[32]; while ((token = pop_token(&line))) { /* Strip comments. */ if (match ("#", token)) { #ifdef UNITTEST printf("%02d: COMMENT: %s", lineno, line); #endif break; } if (!op) { if (match ("mgroup", token)) { op = 1; } else if (match ("mroute", token)) { op = 2; } else { #ifdef UNITTEST printf("%02d: Unknonw command: %s", lineno, line); #else smclog(LOG_WARNING, 0, "%02d: Unknown command %s, skipping.", lineno, token); #endif continue; } } if (match("from", token)) { ifname = pop_token(&line); } else if (match("source", token)) { source = pop_token(&line); } else if (match("group", token)) { group = pop_token(&line); } else if (match("to", token)) { while ((dest[num] = pop_token(&line))) num++; } } #ifdef UNITTEST if (op == 1) { printf("%02d: Found: %s %s\n", lineno, ifname, group); } else if (op == 2) { int i; printf("%02d: Found: %s %s %s ", lineno, ifname, source, group); for (i = 0; i < num; i++) printf("%s ", dest[i]); printf("\n"); } else { printf("%02d: DUMP: %s\n", lineno, linebuf); } #else if (op == 1) join_mgroup(lineno, ifname, group); else if (op == 2) add_mroute(lineno, ifname, group, source, dest, num); #endif /* UNITTEST */ lineno++; } free(linebuf); fclose(fp); return 0; } #ifdef UNITTEST int main (int argc, char *argv[]) { if (argc < 2) { printf("Missing file argument.\n"); return 1; } return parse_conf_file(argv[1]); } #endif /* UNITTEST */ /** * Local Variables: * compile-command: "gcc -g -o unittest -DUNITTEST parse-conf.c && ./unittest ../smcroute.conf" * version-control: t * indent-tabs-mode: t * c-file-style: "linux" * End: */ smcroute-2.0.0/pidfile.c000066400000000000000000000057211241261621500151370ustar00rootroot00000000000000/* $OpenBSD: pidfile.c,v 1.10 2014/06/30 00:26:22 deraadt Exp $ */ /* $NetBSD: pidfile.c,v 1.4 2001/02/19 22:43:42 cgd Exp $ */ /*- * Copyright (c) 1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include #include #include #include #include #include static char *pidfile_path; static pid_t pidfile_pid; static void pidfile_cleanup(void); extern char *__progname; int pidfile(const char *basename) { int save_errno, result; pid_t pid; FILE *f; if (basename == NULL) basename = __progname; if (pidfile_path != NULL) { free(pidfile_path); pidfile_path = NULL; } /* _PATH_VARRUN includes trailing / */ result = asprintf(&pidfile_path, "%s%s.pid", _PATH_VARRUN, basename); if (result == -1 || pidfile_path == NULL) return (-1); if ((f = fopen(pidfile_path, "w")) == NULL) { save_errno = errno; free(pidfile_path); pidfile_path = NULL; errno = save_errno; return (-1); } pid = getpid(); if (fprintf(f, "%ld\n", (long)pid) <= 0 || fflush(f) != 0) { save_errno = errno; (void) fclose(f); (void) unlink(pidfile_path); free(pidfile_path); pidfile_path = NULL; errno = save_errno; return (-1); } (void) fclose(f); pidfile_pid = pid; if (atexit(pidfile_cleanup) < 0) { save_errno = errno; (void) unlink(pidfile_path); free(pidfile_path); pidfile_path = NULL; pidfile_pid = 0; errno = save_errno; return (-1); } return (0); } static void pidfile_cleanup(void) { if (pidfile_path != NULL && pidfile_pid == getpid()) (void) unlink(pidfile_path); } smcroute-2.0.0/smcroute.8000066400000000000000000000232751241261621500153150ustar00rootroot00000000000000.Dd $Mdocdate: November 01 2011 $ .Dt SMCROUTE 8 SMM .Os .Sh NAME .Nm smcroute .Nd SMCRoute, a static multicast router .Sh SYNOPSIS .Nm smcroute .Op OPTIONS .Op COMMANDS .Sh DESCRIPTION .Nm is a command line tool to manipulate the multicast routes of a UNIX kernel. It supports both IPv4 and IPv6 multicast routing. SMCRoute can be used as an alternative to dynamic multicast routers like .Nm mrouted or .Nm pimd in situations where static multicast routes should be maintained and/or no proper IGMP or MLD signaling exists. .Pp Generally multicast routes exists in the kernel only as long as smcroute or another multicast routing daemon is running. Only one multicast routing daemon can be active at a time, so it's impossible to run smcroute and, e.g., .Nm mrouted at the same time. .Pp Because .Nm modifies the kernel routing table it needs to run with full .Ar superuser rights . Which also means that the same applies to client operations, to be able to communicate with the daemon. .Ss WARNING By using multiple output interfaces (traffic multiplication), using the input interface also as output interface (direct loop) or constructing some other forms of indirect loops you can easily flood your networks! .Sh OPTIONS .Bl -tag -width Ds .It Fl d Starts the smcroute daemon before any of the optional following commands are executed. Please note, if started with the .Fl n flag no commands specified on the command line will be run. .It Fl n Run in foreground, do not detach from the calling terminal. This also means that any further commands from that command line are run. Option flags, however, are accepted, but not command flags. .It Fl f Ar FILE Specify an alternative configuration file, instead of the default .Pa /etc/smcroute.conf . .It Fl v Display version and enable verbose logs. This gives a more verbose output in some error situations. Do not expect too much, see syslog instead. .It Fl D Enable additional debug messages. Do not expect too much, see syslog instead. .It Fl h Print a help message and exit. .It Fl k Stop (kill) running daemon. .El .Pp The .Fl d option to smcroute starts the smcroute daemon. It can be started in the foreground using the .Fl n option. The .Fl k option will terminate a running daemon. The .Fl f Ar FILE option can be used to tell the daemon to setup routes from a conf file. By default it looks for /etc/smcroute.conf .Sh COMMANDS The following are commands that can only be passed to an already running daemon. .Bl -tag -width Ds .It Fl a Ar IFNAME SOURCE GROUP IFNAME [IFNAME ...] Add a kernel multicast route from {IFNAME, SOURCE & GROUP} to a list of, at least one, outbound IFNAME. The interfaces can be any network interface as listed by 'ifconfig' or 'ip link list' (incl. tunnel interfaces), but not the loopback interface. Please note that the .Ar SOURCE address is the unicast IPv4 or IPv6 source address of the multicast sender! The .Ar GROUP can be either an IPv4 or IPv6 formatted multicast group address. .It Fl r Ar IFNAME SOURCE GROUP Remove a kernel multicast route. .It Fl j Ar IFNAME GROUP Join a multicast group on a given interface. .It Fl l Ar IFNAME GROUP Leave a multicast group on a given interface. .El .Pp To be able to add/remove routes or join/leave multicast groups the .Nm daemon must run. .Pp Multicast routes can be added with the .Fl a command and removed with the .Fl r command. .Pp A multicast route is defined by an input interface .Ar IFNAME , the sender's unicast IP address .Ar SOURCE , the multicast group .Ar GROUP and a list of, at least one, output interface .Ar IFNAME [IFNAME ...] . .Pp The sender's address and the multicast group must both be IPv4 addresses or IPv6 addresses. If IPv4 addresses are specified then SMCRoute will operate on the IPv4 multicast routes. If IPv6 addresses are specified then SMCRoute will operate on the IPv6 multicast routes. .Pp The output interfaces are not needed when removing routes using the .Fl r command. The first three parameters are sufficient to identify the source of the multicast route. .Pp The intended purpose of SMCRoute is to aid in situations where dynamic multicast routing does not work properly. However, dynamic multicast routing is in nearly all cases the preferred solution. .Pp .Nm can also send simple group join and leave commands to the kernel. As a result the kernel will send Layer-2 IGMP join and leave frames. This can be used for testing but is also useful sometimes to open up multicast from the sender if located on a LAN with switches equipped with IGMP/MLD Snooping. Such devices will prevent forwarding of multicast unless an IGMP/MLD capable router or multicast client is located on the same physical port as you run .Nm on. .Pp To emulate a multicast client using .Nm you use the .Fl j and .Fl l commands to issue join and leave commands for a given multicast group on a given interface .Ar IFNAME . The .Ar GROUP may be given in an IPv4 or IPv6 address format. .Pp The command is passed to the daemon that passes it to the kernel. The kernel then tries to join the multicast group .Ar GROUP on interface .Ar IFNAME by starting IGMP, or MLD for IPv6 group address, signaling on the given interface. This signaling may be received by routers/switches connected on that network supporting IGMP/MLD multicast signaling and, in turn, start forwarding the requested multicast stream eventually reach your desired interface. .Pp With this command .Nm allows the integration of nodes that need static multicast routing into dynamic multicast routing domains. .Pp .Sh CONFIGURATION FILE From version 1.98.0 smcroute supports reading and setting up multicast routes from a config file. The default location is .Ar /etc/smcroute.conf , but this can be overridden using the .Fl f Ar FILE command line option. .Pp .Bd -unfilled -offset left # # smcroute.conf example # # The configuration file supports joining multicast groups, to use # Layer-2 signaling so that switches and routers open up multicast # traffic to your interfaces. Leave is not supported, remove the # mgroup and SIGHUP your daemon, or send a specific leave command. # # Similarily supported is setting mroutes. Removing mroutes is not # supported, remove/comment out the mroute or send a remove command. # # Syntax: # mgroup from IFNAME group MCGROUP # mroute from IFNAME [source ADDRESS] group MCGROUP to IFNAME [IFNAME ...] # # The following example instructs the kernel to join the multicast # group 225.1.2.3 on interface eth0. Followed by setting up an # mroute of the same multicast stream, but from the explicit sender # 192.168.1.42 on the eth0 network and forward to eth1 and eth2. # mgroup from eth0 group 225.1.2.3 mroute from eth0 group 225.1.2.3 source 192.168.1.42 to eth1 eth2 # Here we allow routing of multicast to group 225.3.2.1 from ANY # source coming in from interface eth0 and forward to eth1 and eth2. # NOTE: Routing from ANY source is currently only available for IPv4 # multicast. mgroup from eth0 group 225.3.2.1 mroute from eth0 group 225.3.2.1 to eth1 eth2 .Ed .Pp Fairly simple. As usual, to identify the origin of the inbound multicast we need the .Ar IFNAME , the sender's IP address and, of course, the multicast group address, .Ar MCGROUP . The last argument is a list of outbound interfaces. .Pp From 1.99.0 the sender's IP address is actually optional for IPv4 multicast routes. If omitted it defaults to 0.0.0.0 (INADDR_ANY) and will cause .Nm to dynamically at runtime add new routes, matching the group and inbound interface, to the kernel. This feauture is experimental. .Pp Following the standard UNIX tradition the file format support comments at the beginning of the line using a hash sign. It is untested to have comments at the end of a line, but should work. .Pp When starting up, the daemon by default lists the success of parsing each line and setting up a route. .Sh LIMITS The current version compiles and runs fine on Linux kernel version 2.4, 2.6 and 3.0. Known limits: .Pp .Bl -tag -width TERM -compact -offset indent .It Cm Multicast routes More than 200 .It Cm Multicast group membership Max. 20 .El .Pp .Sh SIGNALS .Nm responds to the following signals: .Pp .Bl -tag -width TERM -compact .It HUP Restarts .Nm . The configuration file is reread every time this signal is received. .It INT Terminates execution gracefully. .It TERM The same as INT. .El .Pp For convenience in sending signals, .Nm writes its process ID to .Pa /var/run/smcroute.pid upon startup. .Pp .Sh FILES .Bl -tag -width /proc/net/ip6_mr_cache -compact .It Pa /etc/smcroute.conf Routes to be added/restored when starting, or restarting the daemon on SIGHUP. .It Pa /var/run/smcroute.pid Pidfile (re)created by .Nm daemon when it has started up and is ready to receive commands. .It Pa /proc/net/ip_mr_cache Holds active IPv4 multicast routes. .It Pa /proc/net/ip_mr_vif Holds the IPv4 virtual interfaces used by the active multicast routing daemon. .It Pa /proc/net/ip6_mr_cache Holds active IPv6 multicast routes. .It Pa /proc/net/ip6_mr_vif Holds the IPv6 virtual interfaces used by the active multicast routing daemon. .It Pa /var/run/smcroute IPC socket created by the smcroute daemon. .It Pa /proc/net/igmp Holds active IGMP joins. .It Pa /proc/net/igmp6 Holds active MLD joins. .El .Pp .Sh SEE ALSO .Xr mrouted 8 , .Xr pimd 8 .Sh BUGS The English wording of this man page. .Sh AUTHORS Originally written by Carsten Schill . Support for IPv6 was added by Todd Hayton . Support for FreeBSD was added by Micha Lenk . .Pp SMCRoute is maintained by Joachim Nilsson , Todd Hayton , Micha Lenk and Julien BLACHE at .Ar https://github.com/troglobit/smcroute . .Sh TIPS A lot of extra information is sent under the daemon facility and the debug priority to the syslog daemon. smcroute-2.0.0/smcroute.c000066400000000000000000000354431241261621500153700ustar00rootroot00000000000000/* Daemon and client main routines * * Copyright (C) 2001-2005 Carsten Schill * Copyright (C) 2006-2009 Julien BLACHE * Copyright (C) 2009 Todd Hayton * Copyright (C) 2009-2011 Micha Lenk * Copyright (C) 2011-2013 Joachim Nilsson * * 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 St, Fifth Floor, Boston, MA 02110-1301 USA */ #include "config.h" #include #include #include #include #include #include #include #include #include #include #include "mclab.h" #define SMCROUTE_SYSTEM_CONF "/etc/smcroute.conf" int do_debug_logging = 0; static int running = 1; static const char *conf_file = SMCROUTE_SYSTEM_CONF; extern char *__progname; static const char version_info[] = "SMCRoute version " PACKAGE_VERSION " build " BUILD "\n"; static const char usage_info[] = "Usage: smcroute [OPTIONS]... [ARGS]...\n" "\n" " -d Start daemon\n" " -n Run daemon in foreground\n" " -f FILE File to use instead of default " SMCROUTE_SYSTEM_CONF "\n" " -k Kill a running daemon\n" "\n" " -h This help text\n" " -D Debug logging\n" " -v Show version and enable verbose logging\n" "\n" " -a ARGS Add a multicast route\n" " -r ARGS Remove a multicast route\n" "\n" " -j ARGS Join a multicast group\n" " -l ARGS Leave a multicast group\n" "\n" " <------------- INBOUND --------------> <----- OUTBOUND ------>\n" " -a [ ...]\n" " -r \n" "\n" " -j \n" " -l \n"; /* * Counts the number of arguments belonging to an option. Option is any argument * begining with a '-'. * * returns: - the number of arguments (without the option itself), * - 0, if we start already from the end of the argument vector * - -1, if we start not from an option */ static int num_option_arguments(const char *argv[]) { const char **ptr; /* end of vector */ if (argv == NULL || *argv == NULL) return 0; /* starting on wrong position */ if (**argv != '-') return -1; for (ptr = argv + 1; *ptr && **ptr != '-'; ptr++) ; return ptr - argv; } /* Parse .conf file and setup routes */ static void read_conf_file(const char *conf_file) { if (access(conf_file, R_OK)) { smclog(LOG_WARNING, errno, "Failed loading %s", conf_file); return; } if (parse_conf_file(conf_file)) smclog(LOG_WARNING, errno, "Failed reading %s", conf_file); } /* Cleans up, i.e. releases allocated resources. Called via atexit() */ static void clean(void) { mroute4_disable(); mroute6_disable(); ipc_exit(); smclog(LOG_NOTICE, 0, "Exiting."); } static void restart(void) { mroute4_disable(); mroute6_disable(); mcgroup4_disable(); mcgroup6_disable(); /* No need to close the IPC, only at cleanup. */ /* Update list of interfaces and create new virtual interface mappings in kernel. */ iface_init(); mroute4_enable(); mroute6_enable(); } static int daemonize(void) { int pid; pid = fork(); if (pid < 0) smclog(LOG_ERR, errno, "Cannot start in background"); if (!pid) { /* Detach deamon from terminal */ if (close(0) < 0 || close(1) < 0 || close(2) < 0 || open("/dev/null", 0) != 0 || dup2(0, 1) < 0 || dup2(0, 2) < 0 || setpgid(0, 0) < 0) smclog(LOG_ERR, errno, "Failed detaching deamon"); } return pid; } /* Check for kernel IGMPMSG_NOCACHE for (*,G) hits. I.e., source-less routes. */ static int read_mroute4_socket(void) { int result; char tmp[128]; struct ip *ip; struct igmpmsg *igmpctl; memset(tmp, 0, sizeof(tmp)); result = read(mroute4_socket, tmp, sizeof(tmp)); /* packets sent up from kernel to daemon have ip->ip_p = 0 */ ip = (struct ip *)tmp; igmpctl = (struct igmpmsg *)tmp; /* Check for IGMPMSG_NOCACHE to do (*,G) based routing. */ if (ip->ip_p == 0 && igmpctl->im_msgtype == IGMPMSG_NOCACHE) { struct iface *iface; mroute4_t mroute; mroute.group.s_addr = igmpctl->im_dst.s_addr; mroute.sender.s_addr = igmpctl->im_src.s_addr; mroute.inbound = igmpctl->im_vif; iface = iface_find_by_vif(mroute.inbound); if (!iface) { /* TODO: Add support for dynamically re-enumerating VIFs at runtime! */ smclog(LOG_WARNING, 0, "No VIF for possibly dynamic inbound iface %s, cannot add mroute dynamically.", mroute.inbound); return 1; } /* Find any matching route for this group on that iif. */ mroute4_dyn_add(&mroute); } return result; } /* Receive and drop ICMPv6 stuff. This is either MLD packets or upcall messages sent up from the kernel. */ static int read_mroute6_socket(void) { char tmp[128]; if (mroute6_socket < 0) return -1; return read(mroute6_socket, tmp, sizeof(tmp)); } /* Receive command from the smcroute client */ static int read_ipc_command(void) { const char *str; struct cmd *packet; struct mroute mroute; uint8 buf[MX_CMDPKT_SZ]; memset(buf, 0, sizeof(buf)); packet = ipc_server_read(buf, sizeof(buf)); if (!packet) { /* Skip logging client disconnects */ if (errno != ECONNRESET) smclog(LOG_WARNING, errno, "Failed receving IPC message from client"); return 1; } switch (packet->cmd) { case 'a': case 'r': if ((str = cmd_convert_to_mroute(&mroute, packet))) { smclog(LOG_WARNING, 0, str); ipc_send(log_last_message, strlen(log_last_message) + 1); break; } if (mroute.version == 4) { if ((packet->cmd == 'a' && mroute4_add(&mroute.u.mroute4)) || (packet->cmd == 'r' && mroute4_del(&mroute.u.mroute4))) { ipc_send(log_last_message, strlen(log_last_message) + 1); break; } } else { #ifndef HAVE_IPV6_MULTICAST_ROUTING smclog(LOG_WARNING, 0, "IPv6 multicast routing support disabled."); #else if ((packet->cmd == 'a' && mroute6_add(&mroute.u.mroute6)) || (packet->cmd == 'r' && mroute6_del(&mroute.u.mroute6))) { ipc_send(log_last_message, strlen(log_last_message) + 1); break; } #endif /* HAVE_IPV6_MULTICAST_ROUTING */ } ipc_send("", 1); break; case 'j': /* j */ case 'l': /* l */ { int result = -1; const char *ifname = (const char *)(packet + 1); const char *groupstr = ifname + strlen(ifname) + 1; if (strchr(groupstr, ':') == NULL) { struct in_addr group; /* check multicast address */ if (!*groupstr || !inet_aton(groupstr, &group) || !IN_MULTICAST(ntohl(group.s_addr))) { smclog(LOG_WARNING, 0, "Invalid multicast group: %s", groupstr); ipc_send(log_last_message, strlen(log_last_message) + 1); break; } /* join or leave */ if (packet->cmd == 'j') result = mcgroup4_join(ifname, group); else result = mcgroup4_leave(ifname, group); } else { /* IPv6 */ #ifndef HAVE_IPV6_MULTICAST_HOST smclog(LOG_WARNING, 0, "IPv6 multicast support disabled."); #else struct in6_addr group; /* check multicast address */ if (!*groupstr || (inet_pton(AF_INET6, groupstr, &group) <= 0) || !IN6_IS_ADDR_MULTICAST(&group)) { smclog(LOG_WARNING, 0, "Invalid multicast group: %s", groupstr); ipc_send(log_last_message, strlen(log_last_message) + 1); break; } /* join or leave */ if (packet->cmd == 'j') result = mcgroup6_join(ifname, group); else result = mcgroup6_leave(ifname, group); #endif /* HAVE_IPV6_MULTICAST_HOST */ } /* failed */ if (result) { ipc_send(log_last_message, strlen(log_last_message) + 1); break; } ipc_send("", 1); break; } case 'k': ipc_send("", 1); exit(0); } return 0; } /* * Signal handler. Take note of the fact that the signal arrived * so that the main loop can take care of it. */ static void handler(int sig) { switch (sig) { case SIGINT: case SIGTERM: running = 0; break; case SIGHUP: smclog(LOG_NOTICE, 0, "Got SIGHUP, reloading %s ...", conf_file); restart(); read_conf_file(conf_file); break; } } static void signal_init(void) { struct sigaction sa; sa.sa_handler = handler; sa.sa_flags = 0; /* Interrupt system calls */ sigemptyset(&sa.sa_mask); sigaction(SIGHUP, &sa, NULL); sigaction(SIGTERM, &sa, NULL); sigaction(SIGINT, &sa, NULL); } static void server_loop(int sd) { fd_set fds; #ifdef HAVE_IPV6_MULTICAST_ROUTING int max_fd_num = MAX(sd, MAX(mroute4_socket, mroute6_socket)); #else int max_fd_num = MAX(sd, mroute4_socket); #endif /* Watch the MRouter and the IPC socket to the smcroute client */ while (running) { int result; FD_ZERO(&fds); FD_SET(sd, &fds); FD_SET(mroute4_socket, &fds); #ifdef HAVE_IPV6_MULTICAST_ROUTING if (-1 != mroute6_socket) FD_SET(mroute6_socket, &fds); #endif /* wait for input */ result = select(max_fd_num + 1, &fds, NULL, NULL, NULL); if (result <= 0) { /* Log all errors, except when signalled, ignore failures. */ if (EINTR != errno) smclog(LOG_WARNING, errno, "select() failure"); continue; } if (FD_ISSET(mroute4_socket, &fds)) read_mroute4_socket(); #ifdef HAVE_IPV6_MULTICAST_ROUTING if (-1 != mroute6_socket && FD_ISSET(mroute6_socket, &fds)) read_mroute6_socket(); #endif /* loop back to select if there is no smcroute command */ if (FD_ISSET(sd, &fds)) read_ipc_command(); } } /* Init everything before forking, so we can fail and return an * error code in the parent and the initscript will fail */ static void start_server(int background) { int sd, api = 0, busy = 0; if (background && daemonize()) return; smclog(LOG_NOTICE, 0, "%s", version_info); /* Build list of multicast-capable physical interfaces that * are currently assigned an IP address. */ iface_init(); if (mroute4_enable()) { if (errno == EADDRINUSE) busy++; } else { api++; } if (mroute6_enable()) { if (errno == EADDRINUSE) busy++; } else { api++; } /* At least one API (IPv4 or IPv6) must have initialized successfully * otherwise we abort the server initialization. */ if (!api) { if (busy) smclog(LOG_INIT, 0, "Another multicast routing application is already running."); else smclog(LOG_INIT, 0, "Kernel does not support multicast routing."); exit(1); } sd = ipc_server_init(); if (sd < 0) smclog(LOG_WARNING, errno, "Failed setting up IPC socket, client communication disabled"); atexit(clean); signal_init(); read_conf_file(conf_file); /* Everything setup, notify any clients by creating the pidfile */ if (pidfile(NULL)) smclog(LOG_WARNING, errno, "Failed creating pidfile"); server_loop(sd); } static int usage(void) { fputs(version_info, stderr); fputs(usage_info, stderr); return 1; } /** * main - Main program * * Parses command line options and enters either daemon or client mode. * * In daemon mode, acquires multicast routing sockets, opens IPC socket * and goes in receive-execute command loop. * * In client mode, creates commands from command line and sends them to * the daemon. */ int main(int argc, const char *argv[]) { int i, num_opts, result = 0; int start_daemon = 0; int background = 1; unsigned int cmdnum = 0; struct cmd *cmdv[16]; /* init syslog */ openlog(__progname, LOG_PID, LOG_DAEMON); if (argc <= 1) return usage(); /* Parse command line options */ for (num_opts = 1; (num_opts = num_option_arguments(argv += num_opts));) { const char *arg; if (num_opts < 0) /* error */ return usage(); /* handle option */ arg = argv[0]; switch (arg[1]) { case 'a': /* add route */ if (num_opts < 5) return usage(); break; case 'r': /* remove route */ if (num_opts < 4) return usage(); break; case 'j': /* join */ case 'l': /* leave */ if (num_opts != 3) return usage(); break; case 'k': /* kill daemon */ if (num_opts != 1) return usage(); break; case 'h': /* help */ return usage(); case 'v': /* verbose */ fputs(version_info, stderr); log_stderr = LOG_DEBUG; continue; case 'd': /* daemon */ start_daemon = 1; continue; case 'n': /* run daemon in foreground, i.e., do not fork */ background = 0; continue; case 'f': if (num_opts != 2) return usage(); conf_file = argv[1]; continue; case 'D': do_debug_logging = 1; continue; default: /* unknown option */ return usage(); } /* Check and build command argument list. */ if (cmdnum >= ARRAY_ELEMENTS(cmdv)) { fprintf(stderr, "Too many command options\n"); return usage(); } cmdv[cmdnum] = cmd_build(arg[1], argv + 1, num_opts - 1); if (!cmdv[cmdnum]) { perror("Failed parsing command"); for (i = 0; i < cmdnum; i++) free(cmdv[i]); return 1; } cmdnum++; } if (start_daemon) { /* only daemon parent enters */ if (geteuid() != 0) { smclog(LOG_ERR, 0, "Need root privileges to start %s", __progname); return 1; } start_server(background); if (!background) return 0; } /* Client or daemon parent only, the daemon never reaches this point */ /* send commands */ if (cmdnum) { int retry_count = 30; openlog(argv[0], LOG_PID, LOG_USER); /* connect to daemon */ while (ipc_client_init()) { switch (errno) { case EACCES: smclog(LOG_ERR, EACCES, "Need root privileges to connect to daemon"); break; case ENOENT: case ECONNREFUSED: /* When starting daemon, give it 30 times a 1/10 second to get ready */ if (start_daemon && --retry_count) { usleep(100000); continue; } smclog(LOG_WARNING, errno, "Daemon not running"); result = 1; break; default: smclog(LOG_WARNING, errno, "Failed connecting to daemon"); result = 1; break; } } for (i = 0; !result && i < cmdnum; i++) { int slen, rlen; uint8 buf[MX_CMDPKT_SZ + 1]; struct cmd *command = cmdv[i]; /* Send command */ slen = ipc_send(command, command->len); /* Wait here for reply */ rlen = ipc_receive(buf, MX_CMDPKT_SZ); if (slen < 0 || rlen < 0) { smclog(LOG_WARNING, errno, "Communication with daemon failed"); result = 1; } if (rlen != 1 || *buf != '\0') { buf[MX_CMDPKT_SZ] = 0; fprintf(stderr, "Daemon error: %s\n", buf); result = 1; } } for (i = 0; i < cmdnum; i++) free(cmdv[i]); } return result; } /** * Local Variables: * version-control: t * indent-tabs-mode: t * c-file-style: "linux" * End: */ smcroute-2.0.0/smcroute.conf000066400000000000000000000023151241261621500160630ustar00rootroot00000000000000# # smcroute.conf example # # The configuration file supports joining multicast groups, to use # Layer-2 signaling so that switches and routers open up multicast # traffic to your interfaces. Leave is not supported, remove the # mgroup and SIGHUP your daemon, or send a specific leave command. # # Similarily supported is setting mroutes. Removing mroutes is not # supported, remove/comment out the mroute or send a remove command. # # Syntax: # mgroup from IFNAME group MCGROUP # mroute from IFNAME [source ADDRESS] group MCGROUP to IFNAME [IFNAME ...] # # The following example instructs the kernel to join the multicast # group 225.1.2.3 on interface eth0. Followed by setting up an # mroute of the same multicast stream, but from the explicit sender # 192.168.1.42 on the eth0 network and forward to eth1 and eth2. # mgroup from eth0 group 225.1.2.3 mroute from eth0 group 225.1.2.3 source 192.168.1.42 to eth1 eth2 # Here we allow routing of multicast to group 225.3.2.1 from ANY # source coming in from interface eth0 and forward to eth1 and eth2. # NOTE: Routing from ANY source is currently only available for IPv4 # multicast. mgroup from eth0 group 225.3.2.1 mroute from eth0 group 225.3.2.1 to eth1 eth2 smcroute-2.0.0/smcroute.init000066400000000000000000000035601241261621500161040ustar00rootroot00000000000000#!/bin/sh # ### BEGIN INIT INFO # Provides: smcroute # Required-Start: $syslog $local_fs $network $remote_fs # Required-Stop: $syslog $local_fs $network $remote_fs # Should-Start: # Should-Stop: # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: Static multicast router daemon # Description: SMCRoute is a tool to manipulate the multicast routes # of the Linux kernel. It can be used as an alternative # to dynamic multicast routers like mrouted in situation # where static multicast routes should be maintained # and/or no proper IGMP signaling exists. ### END INIT INFO PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin DAEMON=/usr/sbin/smcroute DAEMON_OPTS=-d NAME=smcroute DESC="static multicast router daemon" test -x $DAEMON || exit 0 # Include smcroute defaults if available if [ -f /etc/default/smcroute ] ; then . /etc/default/smcroute fi . /lib/lsb/init-functions start() { local error local result log_begin_msg "Starting $DESC: $NAME" error=$(start-stop-daemon --start --quiet \ --exec $DAEMON -- $DAEMON_OPTS 2>&1) result=$? if [ "$result" = "0" -a -x /etc/smcroute/startup.sh ]; then /etc/smcroute/startup.sh else log_progress_msg ${error#ERRO: } fi log_end_msg $result } stop() { local error local result log_begin_msg "Stopping $DESC: $NAME" error=$($DAEMON -k 2>&1) result=$? log_progress_msg ${error#ERRO: } log_end_msg $result } case "$1" in start) start ;; stop) stop ;; restart|force-reload) # # If the "reload" option is implemented, move the "force-reload" # option to the "reload" entry above. If not, "force-reload" is # just the same as "restart". # stop start ;; *) N=/etc/init.d/$NAME echo "Usage: $N {start|stop|restart|force-reload}" >&2 exit 1 ;; esac exit 0 smcroute-2.0.0/syslog.c000066400000000000000000000052551241261621500150450ustar00rootroot00000000000000/* System logging API * * Copyright (C) 2001-2005 Carsten Schill * Copyright (C) 2006-2009 Julien BLACHE * Copyright (C) 2009 Todd Hayton * Copyright (C) 2009-2011 Micha Lenk * Copyright (C) 2011-2013 Joachim Nilsson * * 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 St, Fifth Floor, Boston, MA 02110-1301 USA */ #include "mclab.h" int log_stderr = LOG_WARNING; int log_last_severity; int log_last_error; char log_last_message[128]; /** * smclog - Log message to syslog and stderr * @severity: Standard syslog() severity levels or %LOG_INIT * @code: Error code, @errno, or zero if unused * @fmt: Standard printf() formatted message to log * * Logs a standard printf() formatted message to syslog and stderr when * @severity is greater than the @log_stderr threshold. When @code is * set it is appended to the log, along with the error message. * * When @severity is %LOG_ERR or worse this function will call exit(). */ void smclog(int severity, int code, const char *fmt, ...) { int len = 0; va_list args; const char *err = (code <= 0) ? NULL : (const char *)strerror(code); /* Skip logging for severities 'DEBUG' if do_debug_logging is false */ if (severity == LOG_DEBUG && !do_debug_logging) return; va_start(args, fmt); len += vsnprintf(log_last_message + len, sizeof(log_last_message) - len, fmt, args); if (err) snprintf(log_last_message + len, sizeof(log_last_message) - len, ". Error %d: %s", code, err); va_end(args); /* update our global Last... variables */ log_last_severity = severity; log_last_error = code; /* control logging to stderr */ if (severity < log_stderr || severity == LOG_INIT) fprintf(stderr, "%s\n", log_last_message); /* always to syslog */ syslog((severity == LOG_INIT) ? LOG_ERR : severity, "%s", log_last_message); /* LOG_INIT doesn't trigger that */ if (severity <= LOG_ERR) exit(255); } /** * Local Variables: * version-control: t * indent-tabs-mode: t * c-file-style: "linux" * End: */