smcroute-0.95/0000755000175000017500000000000011620027750012234 5ustar michamichasmcroute-0.95/COPYING0000644000175000017500000004310510445731444013300 0ustar michamicha 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. To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it. For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you". Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does. 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program. You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee. 2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions: a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change. b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License. c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.) These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program. In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License. 3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following: a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, c) Accompany it with the information you received as to the offer to distribute corresponding source code. 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These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or works based on it. 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License. 7. 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If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License. 9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. 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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) 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 Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) year name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 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-0.95/doc/0000755000175000017500000000000011620027750013001 5ustar michamichasmcroute-0.95/doc/smcroute.80000644000175000017500000001500411620016331014724 0ustar michamicha.\" .br - line break (nothing else on the line) .\" .B - bold .\" .I - green or kursive (on HTML) .\" .TP - paragraph ? (header line, followed by indented lines) .\" .TH smcroute 8 "August 08, 2011" .SH NAME SMCRoute \- Static Multicast Router (-Interface) - Version 0.95 .SH SYNOPSIS smcroute < .I options > < .I commands > .TP .I options -d - start daemon .br -v - verbose output .br -D - enable debug logging .TP .I commands - common -h - print help .br -k - kill daemon .TP .I commands - multicast routing related -a [] ... .br - add route .br -r .br - remove route .TP .I commands - multicast signaling related -j - join MC group .br -l - leave MC group .SH DESCRIPTION .B SMCRoute is a command line tool to manipulate the multicast routes of the Linux kernel. It supports both IPv4 and IPv6 multicast routing. SMCRoute can be used as an alternative to dynamic multicast routers like 'mrouted' in situations 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. The .B -d option smcroute is used to start the smcroute daemon. Otherwise, smcroute searches for an already running smcroute daemon and passes the commands to it. The .B -k option will terminate a running daemon. Multicast routes can be added with the .B -a command and removed with the .B -r command. A multicast route is defined by an input interface (), a unicast IP origin address (), a multicast group () and a list of output interfaces ( ...). The origin and multicast group addresses 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. The output interfaces must not be given with the .B -r as the first three parameter are sufficient to identify the route to remove. The intention of SMCRoute is to help in situation where dynamic multicast routing does not work properly, but dynamic multicast routing is in nearly all cases the preferred solution. SMCRoute supports dynamic multicast routing with the multicast group 'join' .B -j and 'leave' .B -l commands. For both commands the input interface on which the multicast sessions should be received () and the multicast group address must be given. The may be an IPv4 or IPv6 address. .B Superuser rights are necessary to start the smcroute daemon or to communicate with the daemon. .SH OPTIONS .TP .B -d Starts the smcroute daemon before any of the optional following commands are executed. .TP .B -v Gives verbose output in some error situations (don't expect too much, check syslog instead). .TP .B -D Gives additional debug messages in normal use (don't expect too much, see syslog instead). .SH COMMANDS .TP .B -a .I [] ... The command is passed to the daemon that adds the given multicast route to the kernel's routing table. .I can be any network interface as listed by 'ifconfig' or 'ip link list' (incl. tunnel interfaces), but not the loopback interface. .I is the source IP address of the multicast packets that will be routed by this entry. It is a unicast IPv4 or IPv6 address and not a multicast IP address. .I is the IPv4 or IPv6 address of the multicast group that will be forwarded. .I [] ... is a list of one or more network interfaces to which the multicast packets will be forwarded. The same rules for the selection of output interfaces applies as for the input interface. .B 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 loop you can flood you network. .TP .B -r .I The command is passed to the daemon that removes a multicast route previously added with the .B -a command. The parameters are identical except to the omitted list of . .TP .B -j .I The command is passed to the daemon that passes it to the kernel. The kernel then tries to join the multicast group .I on interface .I by starting IGMP (or MLD if is an IPv6 address) signaling on .I . This signaling may be received by routers connected to .I 's network that support IGMP/MLD multicast signaling and then hopfuly start forwarding of the requested multicast session to .I 's network. With this command smcroute allows the integration of nodes that needs static multicast routing into dynamic multicast routing networks. .TP .B -l .I The command is passed via the daemon to the kernel that initiate a 'leave' for a previously 'joined' multicast group. .SH LIMITS The current version compiles and runs fine with the Linux kernel version 2.4. The known limits are: .B Multicast routes: more then 200 .B Multicast group membership: max. 20 .SH FILES .TP .B /proc/net/ip_mr_cache - contains the active IPv4 multicast routes .TP .B /proc/net/ip_mr_vif - contains the IPv4 'virtual' interfaces used by the active multicast routing daemon .TP .B /proc/net/ip6_mr_cache - contains the active IPv6 multicast routes .TP .B /proc/net/ip6_mr_vif - contains the IPv6 'virtual' interfaces used by the active multicast routing daemon .TP .B /var/run/smcroute - IPC socket created by the smcroute daemon .SH SEE ALSO mrouted .SH BUGS The English wording of this man page. .SH AUTHORS smcroute was originally written by Carsten Schill , support for IPv6 was added by Todd Hayton , support for FreeBSD was added by Micha Lenk . .PP The source code is now maintained by Todd Hayton , Micha Lenk and Julien BLACHE . The current version is available at: .I http://alioth.debian.org/projects/smcroute .SH TIPS A lot of extra information is sent under the daemon facility and the debug priority to the syslog daemon. smcroute-0.95/doc/mcsender.80000644000175000017500000000355611620016331014674 0ustar michamicha.\" 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-0.95/AUTHORS0000644000175000017500000000040711273347671013320 0ustar michamichasmcroute's authors ------------------ smcroute was originally (2001-2005) developed by Carsten Schill . It is now (2006-) maintained by Julien BLACHE , Todd Hayton and Micha Lenk . smcroute-0.95/ChangeLog0000644000175000017500000000651711620020675014016 0ustar michamichasmcroute 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-0.95/src/0000755000175000017500000000000011620027750013023 5ustar michamichasmcroute-0.95/src/lib.c0000644000175000017500000001050511620011471013727 0ustar michamicha/* ** smcroute - static multicast routing control ** Copyright (C) 2001-2005 Carsten Schill ** Copyright (C) 2006-2009 Julien BLACHE ** Copyright (C) 2009 Todd Hayton ** ** 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 ** ** $Id: lib.c 85 2011-08-08 16:47:53Z micha $ ** ** This module contains the remaining functions that where not placed in ** separate modules ** */ #include "mclab.h" char *fmtInAdr( char *St, struct in_addr InAdr ) /* ** Formats 'InAdr' into a dotted decimal string. ** ** returns: - pointer to 'St' ** */ { sprintf( St, "%u.%u.%u.%u", ((uint8 *)&InAdr.s_addr)[ 0 ], ((uint8 *)&InAdr.s_addr)[ 1 ], ((uint8 *)&InAdr.s_addr)[ 2 ], ((uint8 *)&InAdr.s_addr)[ 3 ] ); return St; } char *fmtSockAdr( char *St, const struct sockaddr_in *SockAdrPt ) /* ** Formats 'SockAdrPt' into a dotted decimal string. ** ** returns: - pointer to 'St' ** */ { uint32 Adr; uint8 *AdrByPt; char *Pt = St; if( SockAdrPt->sin_family != AF_INET ) smclog( LOG_ERR, 0, "fmtSockAdr: not an INET address" ); Adr = SockAdrPt->sin_addr.s_addr; for( AdrByPt = (uint8 *)&Adr; AdrByPt < (uint8 *)(&Adr +1); AdrByPt++ ) { Pt += sprintf( Pt, "%u", *AdrByPt ); *Pt++ = '.'; } *--Pt ='\0'; if( SockAdrPt->sin_port ) Pt += sprintf( Pt, ":%u", SockAdrPt->sin_port ); return St; } int getInAdr( uint32 *InAdrPt, uint16 *PortPt, char *St ) /* ** Converts the dotted decimal internet address plus port ** (xx.xx.xx.xx:pp) in 'St' into their integer ** representations. ** ** 'PortPt' can be NULL if no port number is included or ** should not be converted. ** ** If 'PortPt' is not NULL, then a port number must exist ** in 'St' ** ** returns: - 0 -> conversion failed ** - 1 -> only address part returned (InAdrPt) ** - 2 -> address and port returned ** */ { unsigned AdrVc[ 4 ], Port; /* read address + port */ if( PortPt ) { if( sscanf( St, "%u.%u.%u.%u:%us", &AdrVc[ 0 ], &AdrVc[ 1 ], &AdrVc[ 2 ], &AdrVc[ 3 ], &Port ) != 5 ) return 0; Port = htons( Port ); } else { if( sscanf( St, "%u.%u.%u.%u", &AdrVc[ 0 ], &AdrVc[ 1 ], &AdrVc[ 2 ], &AdrVc[ 3 ] ) != 4 ) return 0; Port = 0; } { int Ix; for( Ix = 0; Ix < 4; Ix++ ) { if( AdrVc[ Ix ] > 255 ) return 0; ((uint8 *)InAdrPt)[ Ix ] = AdrVc[ Ix ]; } } if( ! PortPt ) return 1; if( Port > 0xffffu ) return 0; *PortPt = Port; return 2; } void getSockAdr( struct sockaddr * SaPt, socklen_t * SaLenPt, char * AddrSt, char * PortSt ) /* ** Converts the internet address plus port string in 'St' ** into their network byte order representations. ** ** ** returns: - 0 -> conversion failed ** - 1 -> only address part returned (InAdrPt) ** - 2 -> address and port returned ** */ { 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 ); } return; } smcroute-0.95/src/mclab.h0000644000175000017500000001467411620011471014257 0ustar michamicha/* ** smcroute - static multicast routing control ** Copyright (C) 2001-2005 Carsten Schill ** Copyright (C) 2006-2009 Julien BLACHE ** Copyright (C) 2009 Todd Hayton ** Copyright (C) 2009-2011 Micha Lenk ** ** 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 ** ** $Id: mclab.h,v 1.7 2002/07/07 19:39:28 cschill Exp $ ** */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "config.h" #ifdef HAVE_LINUX_MROUTE_H #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 MIN #define MIN( a, b ) ((a) < (b) ? (a) : (b)) #endif #ifndef MAX #define MAX( a, b ) ((a) < (b) ? (b) : (a)) #endif #define VCMC( Vc ) (sizeof( Vc ) / sizeof( (Vc)[ 0 ] )) #define VCEP( Vc ) (&(Vc)[ VCMC( Vc ) ]) #define MAX_MC_VIFS MAXVIFS /* = to MAXVIFS from linux/mroute.h */ #define MAX_MC_MIFS MAXMIFS /* = to MAXMIFS from linux/mroute6.h */ struct IfDesc { char Name[ sizeof( ((struct ifreq *)NULL)->ifr_name ) ]; struct in_addr InAdr; /* == 0 for non IP interfaces */ u_short IfIndex; /* Physical interface index */ short Flags; short VifIndex; }; /* ifvc.c */ #define MAX_IF 40 // max. number of interfaces recognized void buildIfVc( void ); struct IfDesc *getIfByName( const char *IfName ); struct IfDesc *getIfByIx( unsigned Ix ); /* mroute-api.c */ /* * IPv4 multicast route */ struct MRoute4Desc { struct in_addr OriginAdr; /* sender */ struct in_addr McAdr; /* multicast group */ short InVif; /* incoming VIF */ uint8 TtlVc[ MAX_MC_VIFS ]; /* outgoing VIFs */ }; /* * IPv6 multicast route */ struct MRoute6Desc { struct sockaddr_in6 OriginAdr; /* sender */ struct sockaddr_in6 McAdr; /* multicast group */ short InMif; /* incoming VIF */ uint8 TtlVc[ MAX_MC_MIFS ]; /* outgoing VIFs */ }; /* * Generic multicast route (wrapper for IPv4/IPv6 mroute) */ struct MRouteDesc { int ipVersion; /* 4 or 6 */ union { struct MRoute4Desc mRoute4Desc; struct MRoute6Desc mRoute6Desc; } u; }; /* * Raw IGMP socket used as interface for the IPv4 mrouted API. * Receives IGMP packets and upcall messages from the kernel. */ extern int MRouterFD4; /* * Raw ICMPv6 socket used as interface for the IPv6 mrouted API. * Receives MLD packets and upcall messages from the kenrel. */ extern int MRouterFD6; int enableMRouter4( void ); void disableMRouter4( void ); int addMRoute4( struct MRoute4Desc * Dp ); int delMRoute4( struct MRoute4Desc * Dp ); void addVIF( struct IfDesc *Dp ); int getVifIx( struct IfDesc *IfDp ); int enableMRouter6( void ); void disableMRouter6( void ); int addMRoute6( struct MRoute6Desc * Dp ); int delMRoute6( struct MRoute6Desc * Dp ); void addMIF( struct IfDesc *Dp ); int getMifIx( struct IfDesc *IfDp ); /* ipc.c */ int initIpcServer( void ); struct CmdPkt *readIpcServer( uint8 Bu[], int BuSz ); int initIpcClient( void ); int sendIpc( const void *Bu, int Sz ); int readIpc( uint8 Bu[], int BuSz ); void cleanIpc( void ); /* cmdpkt.c * * XXX show sample packet layouts */ struct CmdPkt { unsigned PktSz; /* total size of packet including CmdPkt header */ uint16 Cmd; /* 'a'=Add,'r'=Remove,'j'=Join,'l'=Leave,'k'=Kill */ uint16 ParCn; /* command argument count */ /* 'ParCn' * '\0' terminated strings + '\0' */ }; #define MX_CMDPKT_SZ 1024 /* CmdPkt size including appended strings */ void *buildCmdPkt( char Cmd, const char *ArgVc[], int ParCn ); const char *convCmdPkt2MRouteDesc( struct MRouteDesc *MrDp, const struct CmdPkt *PktPt ); const char *convCmdPkt2MRoute4Desc( struct MRoute4Desc *MrDp, const struct CmdPkt *PktPt ); const char *convCmdPkt2MRoute6Desc( struct MRoute6Desc *MrDp, const struct CmdPkt *PktPt ); /* lib.c */ char *fmtInAdr( char *St, struct in_addr InAdr ); char *fmtSockAdr( char *St, const struct sockaddr_in *SockAdrPt ); int getInAdr( uint32 *InAdrPt, uint16 *PortPt, char *St ); void getSockAdr( struct sockaddr * SaPt, socklen_t * SaLenPt, char * AddrSt, char * PortSt ); /* mcgroup.c */ int joinMcGroup4( int UdpSock, const char *IfName, struct in_addr McAdr ); int leaveMcGroup4( int UdpSock, const char *IfName, struct in_addr McAdr ); int joinMcGroup6( int UdpSock, const char *IfName, struct in6_addr McAdr ); int leaveMcGroup6( int UdpSock, const char *IfName, struct in6_addr McAdr ); /* syslog.c */ #define LOG_INIT 10 extern int Log2Stderr; /* Log threshold for stderr, LOG_WARNING .... 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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 ** ** $Id: syslog.c 87 2011-08-08 17:18:21Z micha $ ** ** This module contains the interface functions for syslog ** */ #include "mclab.h" int Log2Stderr = LOG_WARNING; int LogLastServerity; int LogLastErrno; char LogLastMsg[ 128 ]; extern int do_debug_logging; void smclog( int Serverity, int Errno, const char *FmtSt, ... ) /* ** Writes the message 'FmtSt' with the parameters '...' to syslog. ** 'Serverity' is used for the syslog entry. For an 'Errno' value ** other then 0, the correponding error string is appended to the ** message. ** ** For a 'Serverity' more important then 'LOG_WARNING' the message is ** also logged to 'stderr' and the program is finished with a call to ** 'exit()'. ** ** If the 'Serverity' is more important then 'Log2Stderr' the message ** is logged to 'stderr'. ** */ { const char ServVc[][ 5 ] = { "EMER", "ALER", "CRIT", "ERRO", "Warn", "Note", "Info", "Debu" }; const char *ServPt; const char *ErrSt = (Errno <= 0) ? NULL : (const char *)strerror( Errno ); // LOG_INIT is a gross hack to work around smcroute's bad architecture // During daemon init, we do not want to trigger the exit() call at the end // of the function to be able to return an exit code from the parent before // we daemonize, without the parent triggering the atexit() handlers in the // normal case (which would remove the socket...) // That gross, ugly hack or a complete rewrite, for now the hack will do. if (Serverity < 0 || Serverity >= VCMC( ServVc )) { if (Serverity == LOG_INIT) ServPt = "INIT"; else ServPt = "!unknown serverity!"; } else ServPt = ServVc[ Serverity ]; // Skip logging for severities 'DEBUG' if do_debug_logging is false if (Serverity == LOG_DEBUG && !do_debug_logging) return; { va_list ArgPt; unsigned Ln; va_start( ArgPt, FmtSt ); Ln = snprintf( LogLastMsg, sizeof( LogLastMsg ), "%s: ", ServPt ); Ln += vsnprintf( LogLastMsg + Ln, sizeof( LogLastMsg ) - Ln, FmtSt, ArgPt ); if( ErrSt ) snprintf( LogLastMsg + Ln, sizeof( LogLastMsg ) - Ln, "; Errno(%d): %s", Errno, ErrSt ); va_end( ArgPt ); } // update our global Last... variables LogLastServerity = Serverity; LogLastErrno = Errno; // control logging to stderr if( Serverity < LOG_WARNING || Serverity < Log2Stderr || Serverity == LOG_INIT) fprintf( stderr, "%s\n", LogLastMsg ); // always to syslog syslog( (Serverity == LOG_INIT) ? LOG_ERR : Serverity, "%s", LogLastMsg ); // LOG_INIT doesn't trigger that if( Serverity <= LOG_ERR ) exit( -1 ); } smcroute-0.95/src/ipc.c0000644000175000017500000001261711620011471013742 0ustar michamicha/* ** smcroute - static multicast routing control ** Copyright (C) 2001-2005 Carsten Schill ** Copyright (C) 2006-2009 Julien BLACHE ** Copyright (C) 2009 Todd Hayton ** Copyright (C) 2009-2011 Micha Lenk ** ** 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 ** ** $Id: ipc.c 85 2011-08-08 16:47:53Z micha $ ** ** This module contains the IPC functions for client and server ** */ #include #include #include #include #include "mclab.h" #define SOCKET_PATH "/var/run/smcroute" /* server's listen socket */ static int ListenSock; /* connected server or client socket */ static int ConSock = -1; int initIpcServer() /* ** Inits an IPC listen socket ** ** returns: - the socket descriptor ** */ { struct sockaddr_un UnixAddr; socklen_t UnixAddrLen; if( (ListenSock = socket( AF_UNIX, SOCK_STREAM, 0 )) < 0 ) { smclog( LOG_INIT, errno, "initIpcServer, socket() failed" ); return -1; } #ifdef HAVE_SOCKADDR_UN_SUN_LEN UnixAddr.sun_len = 0; /* <- correct length is set by the OS */ #endif UnixAddr.sun_family = AF_UNIX; strcpy( UnixAddr.sun_path, SOCKET_PATH ); unlink( SOCKET_PATH ); UnixAddrLen = offsetof(struct sockaddr_un, sun_path) + strlen(SOCKET_PATH); if( bind( ListenSock, (struct sockaddr *)&UnixAddr, UnixAddrLen ) < 0 || listen( ListenSock, 1 ) ) { smclog( LOG_INIT, errno, "initIpcServer, bind()/listen() failed" ); close(ListenSock); return -1; } return ListenSock; } int initIpcClient() /* ** Connects to the IPC socket of the server ** ** returns: - 0, if function succeeds ** - errno value, of connection attempt. Typically: ** - EACCES - Permission denied ** - ENOENT - No such file or directory ** - ECONREFUSED - Connection refused */ { struct sockaddr_un UnixAddr; socklen_t UnixAddrLen; if( (ConSock = socket( AF_UNIX, SOCK_STREAM, 0 )) < 0 ) smclog( LOG_ERR, errno, "initIpcClient, socket() failed" ); #ifdef HAVE_SOCKADDR_UN_SUN_LEN UnixAddr.sun_len = 0; /* <- correct length is set by the OS */ #endif UnixAddr.sun_family = AF_UNIX; strcpy( UnixAddr.sun_path, SOCKET_PATH ); UnixAddrLen = offsetof(struct sockaddr_un, sun_path) + strlen(SOCKET_PATH); if( connect( ConSock, (struct sockaddr *)&UnixAddr, UnixAddrLen ) < 0) { int Err = errno; close( ConSock ); ConSock = 0; return Err; } smclog( LOG_DEBUG, 0, "client connected, fd %d", ConSock ); return 0; } struct CmdPkt *readIpcServer( uint8 Bu[], int BuSz ) /* ** Reads a message from the IPC socket and stores in 'Bu' with a max. size of 'BuSz'. ** Connects and resets connection as necessary. ** ** returns: Pointer to a successfuly read command packet in 'Bu' ** */ { while( 1 ) { int RdSz; socklen_t AddrLn = 0; /* wait for connections */ if( ConSock < 0 ) { smclog( LOG_DEBUG, 0, "readIpcServer, waiting for connection..." ); if( (ConSock = accept( ListenSock, NULL, &AddrLn )) < 0 ) smclog( LOG_ERR, errno, "readIpcServer, accept() failed" ); smclog( LOG_DEBUG, 0, "readIpcServer, accepted connection" ); } /* read */ memset( Bu, 0, BuSz ); /* had some problems with buffer garbage */ RdSz = read( ConSock, Bu, BuSz ); smclog( LOG_DEBUG, 0, "readIpcServer, CmdPkt read (%d)", RdSz ); /* successfull read */ if( RdSz >= sizeof( struct CmdPkt ) && RdSz == ((struct CmdPkt *)Bu)->PktSz ) return (struct CmdPkt *)Bu; /* connection lost ? -> reset connection */ if( ! RdSz ) { smclog( LOG_DEBUG, 0, "readIpcServer, connection lost" ); close( ConSock ); ConSock = -1; continue; } /* error */ smclog( LOG_WARNING, errno, "readIpcServer, read() failed" ); } } int sendIpc( const void *Bu, int Sz ) /* ** Sends the IPC message in 'Bu' with the size 'Sz' to the peer. ** ** returns: - number of bytes written (Sz) ** - -1 if write failed ** */ { if( write( ConSock, Bu, Sz ) != Sz ) { smclog( LOG_ERR, errno, "sendIpc, write failed (%d)", Sz ); return -1; } return Sz; } int readIpc( uint8 Bu[], int BuSz ) /* ** Reads the next IPC message in 'Bu' with the max. size 'BuSz' from the peer. ** ** returns: - number of bytes read (0..BuSz) ** - -1 if read failed ** */ { int RdSz = read( ConSock, Bu, BuSz ); smclog( LOG_DEBUG, 0, "readIpc, read (%d)", RdSz ); if( RdSz < 1 ) smclog( LOG_WARNING, errno, "readIpc, read() failed" ); return RdSz; } void cleanIpc() /* ** Clean up IPC. ** ** */ { if( ListenSock ) { close( ListenSock ); unlink( SOCKET_PATH ); } if( ConSock >= 0 ) close( ConSock ); } smcroute-0.95/src/ifvc.c0000644000175000017500000000641711620011471014117 0ustar michamicha/* ** smcroute - static multicast routing control ** Copyright (C) 2001-2005 Carsten Schill ** Copyright (C) 2006-2009 Julien BLACHE ** Copyright (C) 2009 Todd Hayton ** Copyright (C) 2009-2011 Micha Lenk ** ** 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 ** ** $Id: ifvc.c 85 2011-08-08 16:47:53Z micha $ ** ** This module manages an interface vector of the machine ** */ #include #include #include #include #include "mclab.h" struct IfDesc IfDescVc[ MAX_IF ], *IfDescEp = IfDescVc; void buildIfVc() /* ** Builds up a vector with the interface of the machine. Calls to the other functions of ** the module will fail if they are called before the vector is build. ** */ { struct ifaddrs *ifaddr, *ifa; memset(IfDescVc, 0, sizeof(IfDescVc)); if (getifaddrs(&ifaddr) == -1) { smclog( LOG_ERR, errno, "Failed to retrieve interface addresses" ); return; } for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) { int family = ifa->ifa_addr->sa_family; /* Skip non-IPv4 and non-IPv6 interfaces */ if ((family != AF_INET) && (family != AF_INET6)) continue; /* Skip interface without internet address */ if (ifa->ifa_addr == NULL) continue; /* Copy data from interface iterator 'ifa' */ strncpy(IfDescEp->Name, ifa->ifa_name, sizeof(IfDescEp->Name)); if (family == AF_INET) IfDescEp->InAdr.s_addr = ((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr; IfDescEp->Flags = ifa->ifa_flags; IfDescEp->IfIndex = if_nametoindex(IfDescEp->Name); IfDescEp->VifIndex = -1; IfDescEp++; } freeifaddrs(ifaddr); } struct IfDesc *getIfByName( const char *IfName ) /* ** Returns a pointer to the IfDesc of the interface 'IfName' ** ** returns: - pointer to the IfDesc of the requested interface ** - NULL if no interface 'IfName' exists ** ** - if more than one interface 'IfName' exists, chose the ** an interface that corresponds to a virtual interface */ { struct IfDesc *Dp; struct IfDesc *candidate = NULL; for( Dp = IfDescVc; Dp < IfDescEp; Dp++ ) if( ! strcmp( IfName, Dp->Name ) ) { if (Dp->VifIndex >= 0) return Dp; candidate = Dp; } return candidate; } struct IfDesc *getIfByIx( unsigned Ix ) /* ** Returns a pointer to the IfDesc of the interface 'Ix' ** ** returns: - pointer to the IfDesc of the requested interface ** - NULL if no interface 'Ix' exists ** */ { struct IfDesc *Dp = &IfDescVc[ Ix ]; return Dp < IfDescEp ? Dp : NULL; } smcroute-0.95/src/smcroute.c0000644000175000017500000003241611620014131015023 0ustar michamicha/* ** smcroute - static multicast routing control ** Copyright (C) 2001-2005 Carsten Schill ** Copyright (C) 2006-2008 Julien BLACHE ** Copyright (C) 2006-2009 Julien BLACHE ** Copyright (C) 2009 Todd Hayton ** Copyright (C) 2009-2011 Micha Lenk ** ** 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 ** ** $Id: smcroute.c 86 2011-08-08 17:09:45Z micha $ ** */ #include #include #include #include #include #include #include #include #include "mclab.h" #include "config.h" #include "build.h" static const char Version[] = "smcroute, Version " PACKAGE_VERSION ", Build" BUILD "\n" "Copyright 2001-2005 Carsten Schill \n" "Copyright 2006-2009 Julien Blache ,\n" " Todd Hayton , and\n" " Micha Lenk \n" "Distributed under the GNU GENERAL PUBLIC LICENSE, Version 2 - check GPL.txt\n" "\n"; static const char Usage[] = "usage: smcroute\t[-v] [-d] [-k] [-D]\n" "\n" "\t\t[-a [] ...]\n" "\t\t[-r ]\n" "\n" "\t\t[-j ]\n" "\t\t[-l ]\n" ; static const char MissingArgSt[] = ""; int McGroupSock4 = -1; int McGroupSock6 = -1; int do_debug_logging = 0; static int getArgOptLn( const char *ArgVc[] ) /* ** 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 ** */ { const char **Pp; /* end of vector */ if( ArgVc == NULL || *ArgVc == NULL ) return 0; /* starting on wrong position */ if( **ArgVc != '-' ) return -1; for( Pp = ArgVc +1; *Pp && **Pp != '-'; Pp++ ) /* */; return Pp - ArgVc; } static void clean() /* ** Cleans up, i.e. releases allocated resources. Called via atexit(). ** */ { smclog( LOG_DEBUG, 0, "clean handler called" ); disableMRouter4(); disableMRouter6(); cleanIpc(); } static int initMRouter4() /* ** Inits the necessary resources for IPv4 MRouter. ** */ { int Err; switch( Err = enableMRouter4() ) { case 0: break; case EADDRINUSE: smclog( LOG_INIT, EADDRINUSE, "MC-Router IPv4 API already in use" ); return -1; #ifdef EOPNOTSUPP case EOPNOTSUPP: #endif case ENOPROTOOPT: smclog( LOG_WARNING, 0, "Kernel does not support IPv4 multicast routing (skipping IPv4 routing)" ); return -1; default: smclog( LOG_INIT, Err, "MRT_INIT failed" ); return -1; } /* create VIFs for all IP, non-loop interfaces */ { unsigned Ix; struct IfDesc *Dp; for( Ix = 0; (Dp = getIfByIx( Ix )); Ix++ ) if( Dp->InAdr.s_addr && ! (Dp->Flags & IFF_LOOPBACK) ) addVIF( Dp ); } return 0; } static int initMRouter6() /* ** Inits the necessary resources for IPv6 MRouter. ** */ { int Err; switch( Err = enableMRouter6() ) { case 0: break; case EADDRINUSE: smclog( LOG_INIT, EADDRINUSE, "MC-Router IPv6 API already in use" ); return -1; #ifdef EOPNOTSUPP case EOPNOTSUPP: #endif case ENOPROTOOPT: smclog( LOG_WARNING, 0, "Kernel does not support IPv6 multicast routing (skipping IPv6 routing)" ); return -1; default: smclog( LOG_INIT, Err, "MRT6_INIT failed" ); return -1; } /* create MIFs for all IP, non-loop interfaces */ { unsigned Ix; struct IfDesc *Dp; for( Ix = 0; (Dp = getIfByIx( Ix )); Ix++ ) if( Dp->InAdr.s_addr && ! (Dp->Flags & IFF_LOOPBACK) ) addMIF( Dp ); } return 0; } void ServerLoop(void) { uint8 Bu[ MX_CMDPKT_SZ ]; int IpcServerFD; unsigned short initialized_api_count; /* * Init everything before forking, so we can fail and return an * error code in the parent and the initscript will fail */ /* * Build list of multicast-capable physical interfaces that * are currently assigned an IP address. */ buildIfVc(); initialized_api_count = 0; if (initMRouter4() == 0) initialized_api_count++; if (initMRouter6() == 0) initialized_api_count++; /* At least one API (IPv4 or IPv6) must have initialized successfully * otherwise we abort the server initialization. */ if (initialized_api_count == 0) { smclog( LOG_INIT, ENOPROTOOPT, "Kernel does not support multicast routing" ); exit(1); } IpcServerFD = initIpcServer(); if (IpcServerFD < 0) { clean(); exit(2); } /* creat daemon process */ if( ! fork() ) { /* only daemon enters */ atexit( clean ); /* 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 || setpgrp() < 0 ) smclog( LOG_ERR, errno, "failed to detach deamon" ); while( 1 ) { struct CmdPkt *PktPt; /* watch the MRouter and the IPC socket to the smcroute client */ { fd_set ReadFDS; #ifdef HAVE_IPV6_MULTICAST_ROUTING int MaxFD = MAX( IpcServerFD, MAX( MRouterFD4, MRouterFD6 ) ); #else int MaxFD = MAX( IpcServerFD, MRouterFD4 ); #endif int Rt; FD_ZERO( &ReadFDS ); FD_SET( IpcServerFD, &ReadFDS ); FD_SET( MRouterFD4, &ReadFDS ); #ifdef HAVE_IPV6_MULTICAST_ROUTING FD_SET( MRouterFD6, &ReadFDS ); #endif /* wait for input */ Rt = select( MaxFD +1, &ReadFDS, NULL, NULL, NULL ); /* log and ignore failures */ if( Rt <= 0 ) { smclog( LOG_WARNING, errno, "select() failure" ); continue; } /* * Receive and drop IGMP stuff. This is either IGMP packets * or upcall messages sent up from the kernel. */ if( FD_ISSET( MRouterFD4, &ReadFDS ) ) { char Bu[ 128 ]; Rt = read( MRouterFD4, Bu, sizeof( Bu ) ); smclog( LOG_DEBUG, 0, "%d byte IGMP signaling dropped", Rt ); } /* * Receive and drop ICMPv6 stuff. This is either MLD packets * or upcall messages sent up from the kernel. */ #ifdef HAVE_IPV6_MULTICAST_ROUTING if( FD_ISSET( MRouterFD6, &ReadFDS ) ) { char Bu[ 128 ]; Rt = read( MRouterFD6, Bu, sizeof( Bu ) ); smclog( LOG_DEBUG, 0, "%d byte MLD signaling dropped", Rt ); } #endif /* loop back to select if there is no smcroute command */ if( ! FD_ISSET( IpcServerFD, &ReadFDS ) ) continue; } /* receive the command from the smcroute client */ PktPt = readIpcServer( Bu, sizeof( Bu ) ); switch( PktPt->Cmd ) { struct MRouteDesc MrDe; const char *ErrSt; case 'a': case 'r': if( (ErrSt = convCmdPkt2MRouteDesc( &MrDe, PktPt )) ) { smclog( LOG_WARNING, 0, ErrSt ); sendIpc( LogLastMsg, strlen( LogLastMsg ) +1 ); break; } if (MrDe.ipVersion == 4) { if( (PktPt->Cmd == 'a' && addMRoute4( &MrDe.u.mRoute4Desc )) || (PktPt->Cmd == 'r' && delMRoute4( &MrDe.u.mRoute4Desc )) ) { sendIpc( LogLastMsg, strlen( LogLastMsg ) +1 ); break; } } else { if( (PktPt->Cmd == 'a' && addMRoute6( &MrDe.u.mRoute6Desc )) || (PktPt->Cmd == 'r' && delMRoute6( &MrDe.u.mRoute6Desc )) ) { sendIpc( LogLastMsg, strlen( LogLastMsg ) +1 ); break; } } sendIpc( "", 1 ); break; case 'j': /* j */ case 'l': /* l */ { const char *IfSt = (const char *)(PktPt +1); const char *McAdrSt = IfSt + strlen( IfSt ) +1; int Rt; if (strchr(McAdrSt, ':') == NULL) { struct in_addr McAdr; /* check multicast address */ if( ! *McAdrSt || ! inet_aton( McAdrSt, &McAdr ) || ! IN_MULTICAST( ntohl( McAdr.s_addr ) ) ) { smclog( LOG_WARNING, 0, "invalid multicast group address: '%s'", McAdrSt ); sendIpc( LogLastMsg, strlen( LogLastMsg ) +1 ); break; } /* create socket for IGMP as needed */ if( McGroupSock4 < 0 ) McGroupSock4 = openUdpSocket( INADDR_ANY, 0 ); /* join or leave */ if( PktPt->Cmd == 'j' ) Rt = joinMcGroup4( McGroupSock4, IfSt, McAdr ); else Rt = leaveMcGroup4( McGroupSock4, IfSt, McAdr ); } else { /* IPv6 */ struct in6_addr McAdr; /* check multicast address */ if( ! *McAdrSt || ( inet_pton( AF_INET6, McAdrSt, &McAdr ) <= 0 ) || ! IN6_MULTICAST( &McAdr ) ) { smclog( LOG_WARNING, 0, "invalid multicast group address: '%s'", McAdrSt ); sendIpc( LogLastMsg, strlen( LogLastMsg ) +1 ); break; } /* create socket for IGMP as needed */ if( McGroupSock6 < 0 ) { McGroupSock6 = socket( AF_INET6, SOCK_DGRAM, IPPROTO_UDP ); if (McGroupSock6 < 0) smclog( LOG_WARNING, errno, "socket failed" ); } /* join or leave */ if( PktPt->Cmd == 'j' ) Rt = joinMcGroup6( McGroupSock6, IfSt, McAdr ); else Rt = leaveMcGroup6( McGroupSock6, IfSt, McAdr ); } /* failed */ if( Rt ) { sendIpc( LogLastMsg, strlen( LogLastMsg ) +1 ); break; } sendIpc( "", 1 ); break; } case 'k': sendIpc( "", 1 ); exit( 0 ); } } } } int main( int ArgCn, const char *ArgVc[] ) /* ** main programm ** - scans options ** - daemon mode: enters daemon status and goes in receive-execute command loop ** - client mode: creates commands from command line and sends them to the daemon ** */ { struct CmdPkt *CmdVc[ 16 ], **CmdVcPt = CmdVc; uint8 Bu[ MX_CMDPKT_SZ ]; int StartDaemon = 0; int ProgRt = 0; /* init syslog */ openlog( ArgVc[ 0 ], LOG_PID, LOG_DAEMON ); if( ArgCn <= 1 ) { Usage: fputs( Version, stderr ); fputs( Usage, stderr ); return 1; } /* scan options */ { int OptLn; for( OptLn = 1; (OptLn = getArgOptLn( ArgVc += OptLn )); ) { if( OptLn < 0 ) /* error */ goto Usage; /* handle option */ switch( *(*ArgVc +1) ) { case 'a': /* add route */ if( OptLn < 5 ) { fprintf( stderr, "not enough arguments for 'add' command\n" ); goto Usage; } BuildCmd: if( CmdVcPt >= VCEP( CmdVc ) ) { fprintf( stderr, "too many command options\n" ); goto Usage; } *CmdVcPt++ = buildCmdPkt( *(*ArgVc +1), ArgVc +1, OptLn -1 ); break; case 'r': /* remove route */ if( OptLn < 4 ) { fprintf( stderr, "wrong number of arguments for 'remove' command\n" ); goto Usage; } goto BuildCmd; case 'j': /* join */ case 'l': /* leave */ if( OptLn != 3 ) { fprintf( stderr, "wrong number of arguments for 'join'/'leave' command\n" ); goto Usage; } goto BuildCmd; case 'k': /* kill daemon */ if( OptLn != 1 ) { fprintf( stderr, "no arguments allowed for 'k' option\n" ); goto Usage; } goto BuildCmd; case 'h': /* help */ puts( Version ); puts( Usage ); break; case 'v': /* verbose */ fputs( Version, stderr ); Log2Stderr = LOG_DEBUG; break; case 'd': /* daemon */ StartDaemon = 1; break; case 'D': do_debug_logging = 1; break; default: /* unknown option */ fprintf( stderr, "unknown option: %s\n", *ArgVc ); goto Usage; } } } if( StartDaemon ) { /* only daemon parent enters */ ServerLoop(); } /* Client or daemon parent only, the daemon never reaches this point */ /* send commands */ if( CmdVcPt > CmdVc ) { struct CmdPkt **PktPp; openlog( ArgVc[ 0 ], LOG_PID, LOG_USER ); /* connect to daemon */ { int Err; int RetryCn = 30; Retry: switch( Err = initIpcClient() ) { case 0: break; case EACCES: smclog( LOG_ERR, EACCES, "need super-user rights to connect to daemon" ); break; case ENOENT: case ECONNREFUSED: /* * If we started the daemon -> give it 30 times a 1/10 second to * get ready */ if( StartDaemon && --RetryCn ) { usleep( 100000 ); goto Retry; } smclog( LOG_ERR, Err, "daemon not running ?" ); break; default: smclog( LOG_ERR, Err, "can't connect to daemon" ); break; } } for( PktPp = CmdVc; PktPp < CmdVcPt; PktPp++ ) { int RdSz = 0; if( (sendIpc( *PktPp, (*PktPp)->PktSz ) < 0) || (RdSz = readIpc( Bu, sizeof( Bu ) )) < 0 ) smclog( LOG_ERR, errno, "read/write to daemon failed" ); smclog( LOG_DEBUG, 0, "RdSz: %d", RdSz ); if( RdSz != 1 || *Bu != '\0' ) { fprintf( stderr, "daemon error: %s\n", Bu ); ProgRt = 1; } free( *PktPp ); } } return ProgRt; } smcroute-0.95/src/cmdpkt.c0000644000175000017500000002044411620011471014446 0ustar michamicha/* ** smcroute - static multicast routing control ** Copyright (C) 2001-2005 Carsten Schill ** Copyright (C) 2006-2009 Julien BLACHE ** Copyright (C) 2009 Todd Hayton ** Copyright (C) 2009-2011 Micha Lenk ** ** 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 ** ** $Id: cmdpkt.c 85 2011-08-08 16:47:53Z micha $ ** ** This module contains the functions to build and convert IPC command packets ** */ #include #include #include #include "mclab.h" static int getVifIxfromArg( const char *ArgPt ) /* ** Gets the VIF index for a given interface name '*ArgPt' ** ** returns: - index of the VIF ** - -1 if no VIF can be found for the interface name ** */ { struct IfDesc *IfDp; int Rt; /* get input interface index -> InpVifIx */ if( ! (IfDp = getIfByName( ArgPt )) ) return -1; if( (Rt = getVifIx( IfDp )) < 0 ) return -1; return Rt; } static int getMifIxfromArg( const char *ArgPt ) /* ** Gets the MIF index for a given interface name '*ArgPt' ** ** returns: - index of the MIF ** - -1 if no MIF can be found for the interface name ** */ { struct IfDesc *IfDp; int Rt; /* get input interface index -> InpVifIx */ if( ! (IfDp = getIfByName( ArgPt )) ) return -1; if( (Rt = getMifIx( IfDp )) < 0 ) return -1; return Rt; } void *buildCmdPkt( char Cmd, const char *ArgVc[], int ParCn ) /* ** Builds an command packet with the command 'Cmd' and 'ParCn' arguments ** from 'ArgVc'. ** ** returns: - pointer to the dyn. allocated command packet ** */ { unsigned AccStSz, PktSz; struct CmdPkt *PktPt; /* accumulate space for arg strings */ { const char **Pp; int Cn; for( Cn = ParCn, Pp = ArgVc, AccStSz = 0; Cn; Cn--, Pp++ ) AccStSz += strlen( *Pp ) +1; } /* resulting packet size */ PktSz = sizeof( struct CmdPkt ) + AccStSz +1; /* makes no sense */ if( PktSz > MX_CMDPKT_SZ ) smclog( LOG_ERR, 0, "option too big" ); /* build packet */ if( ! (PktPt = malloc( PktSz )) ) smclog( LOG_ERR, errno, "out of memory for option arguments" ); PktPt->PktSz = PktSz; PktPt->Cmd = Cmd; PktPt->ParCn = ParCn; /* copy args */ { char *FillPt; for( FillPt = (char *)(PktPt +1); ParCn; ParCn--, ArgVc++ ) { int Sz = strlen( *ArgVc ) +1; memcpy( FillPt, *ArgVc, Sz ); FillPt += Sz; } *FillPt = '\0'; /* '\0' behind last string */ } return PktPt; } const char * convCmdPkt2MRouteDesc( struct MRouteDesc *MrDp, const struct CmdPkt *PktPt ) /* ** Converts a command packet 'PktPt' to an MRouteDesc struct 'MrDp' for the ** 'add' and 'remove' command. The IP version is determined by searching ** for ':' in the address strings to indicate IPv6 addresses. ** ** returns: - NULL if the conversion succeeded ** - an error string with a hint why the conversion failed ** */ { char *ArgSt = (char *)(PktPt +1); memset(MrDp, 0, sizeof(*MrDp)); switch (PktPt->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" | * +----+-----+---+--------------------------------------------+ * ^ ^ * | | * | | * +---CmdPkt-----+ * * -r 1.1.1.1 239.1.1.1 * * +----+-----+---+--------------------------+ * | 27 | 'r' | 2 | "1.1.1.1\0239.1.1.1\0\0" | * +----+-----+---+--------------------------+ * ^ ^ * | | * | | * +---CmdPkt-----+ * */ if (PktPt->Cmd == 'a' || PktPt->ParCn > 2) ArgSt += strlen(ArgSt) + 1; if (strchr(ArgSt, ':') != NULL) { MrDp->ipVersion = 6; return convCmdPkt2MRoute6Desc( &MrDp->u.mRoute6Desc, PktPt ); } else { MrDp->ipVersion = 4; return convCmdPkt2MRoute4Desc( &MrDp->u.mRoute4Desc, PktPt ); } break; default: return "Invalid command"; } return NULL; } const char * convCmdPkt2MRoute4Desc( struct MRoute4Desc *MrDp, const struct CmdPkt *PktPt ) /* ** Converts a command packet 'PktPt' to an MRoute4Desc struct 'MrDp' for the ** 'add' and 'remove' command. ** ** returns: - NULL if the conversion succeeded ** - an error string with a hint why the conversion failed ** */ { const char *ArgSt = (const char *)(PktPt +1); memset(MrDp, 0, sizeof(*MrDp)); /* * * -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" | * +----+-----+---+--------------------------------------------+ * ^ ^ * | | * | | * +---CmdPkt-----+ * */ /* get input interface index */ if( ! *ArgSt || (MrDp->InVif = getVifIxfromArg( ArgSt )) < 0 ) return "invalid input interface"; /* get origin */ ArgSt += strlen( ArgSt ) +1; if( ! *ArgSt || (inet_pton( AF_INET, ArgSt, &MrDp->OriginAdr ) <= 0) ) return "invalid origin IP address"; /* get multicast group */ ArgSt += strlen( ArgSt ) +1; if( ! *ArgSt || (inet_pton( AF_INET, ArgSt, &MrDp->McAdr ) <= 0) || ! IN_MULTICAST( ntohl( MrDp->McAdr.s_addr ) ) ) return "invalid multicast group address"; /* * Scan output interfaces for the 'add' command only, just ignore it * for the 'remove' command to be compatible to the first release. */ if( PktPt->Cmd == 'a' ) { for( ArgSt += strlen( ArgSt ) +1; *ArgSt; ArgSt += strlen( ArgSt ) +1 ) { int VifIx; if( (VifIx = getVifIxfromArg( ArgSt )) < 0 ) return "invalid output interface"; if( VifIx == MrDp->InVif ) smclog( LOG_WARNING, 0, "forwarding multicast to the input interface may not make sense: %s", ArgSt ); MrDp->TtlVc[ VifIx ] = 1; /* Use a TTL threashold */ } } return NULL; } const char * convCmdPkt2MRoute6Desc( struct MRoute6Desc *MrDp, const struct CmdPkt *PktPt ) /* ** Converts a command packet 'PktPt' to an MRoute6Desc struct 'MrDp' for the ** 'add' and 'remove' command. ** ** returns: - NULL if the conversion succeeded ** - an error string with a hint why the conversion failed ** */ { const char *ArgSt = (const char *)(PktPt +1); memset(MrDp, 0, sizeof(*MrDp)); /* get input interface index */ if( ! *ArgSt || (MrDp->InMif = getMifIxfromArg( ArgSt )) < 0 ) return "invalid input interface"; /* get origin */ ArgSt += strlen( ArgSt ) +1; if( ! *ArgSt || (inet_pton( AF_INET6, ArgSt, &MrDp->OriginAdr.sin6_addr ) <= 0) ) return "invalid origin IP address"; /* get multicast group */ ArgSt += strlen( ArgSt ) +1; if( ! *ArgSt || (inet_pton( AF_INET6, ArgSt, &MrDp->McAdr.sin6_addr ) <= 0) || ! IN6_MULTICAST( &MrDp->McAdr.sin6_addr ) ) return "invalid multicast group address"; /* * Scan output interfaces for the 'add' command only, just ignore it * for the 'remove' command to be compatible to the first release. */ if( PktPt->Cmd == 'a' ) { for( ArgSt += strlen( ArgSt ) +1; *ArgSt; ArgSt += strlen( ArgSt ) +1 ) { int MifIx; if( (MifIx = getMifIxfromArg( ArgSt )) < 0 ) return "invalid output interface"; if( MifIx == MrDp->InMif ) smclog( LOG_WARNING, 0, "forwarding multicast to the input interface may not make sense: %s", ArgSt ); MrDp->TtlVc[ MifIx ] = 1; /* Use a TTL threashold */ } } return NULL; } smcroute-0.95/src/config.h.in0000644000175000017500000001252311617541474015063 0ustar michamicha/* config.h.in. Generated from configure.ac by autoheader. */ /* Define to 1 if you have the header file. */ #undef HAVE_ARPA_INET_H /* Define to 1 if you have the `atexit' function. */ #undef HAVE_ATEXIT /* Define to 1 if you have the `dup2' function. */ #undef HAVE_DUP2 /* Define to 1 if you have the header file. */ #undef HAVE_FCNTL_H /* Define to 1 if you have the `fork' function. */ #undef HAVE_FORK /* Define to 1 if you have the header file. */ #undef HAVE_IFADDRS_H /* Define to 1 if you have the header file. */ #undef HAVE_INTTYPES_H /* Define to 1 if your OS supports acting as an IPv6 multicast host */ #undef HAVE_IPV6_MULTICAST_HOST /* Define to 1 if your OS supports IPv6 multicast routing */ #undef HAVE_IPV6_MULTICAST_ROUTING /* Define to 1 if you have the header file. */ #undef HAVE_LINUX_MROUTE6_H /* Define to 1 if you have the header file. */ #undef HAVE_LINUX_MROUTE_H /* Define to 1 if you have the header file. */ #undef HAVE_LINUX_SOCKIOS_H /* Define to 1 if your system has a GNU libc compatible `malloc' function, and to 0 otherwise. */ #undef HAVE_MALLOC /* Define to 1 if you have the header file. */ #undef HAVE_MEMORY_H /* Define to 1 if you have the `memset' function. */ #undef HAVE_MEMSET /* Define to 1 if the struct mif6ctl has a member vifc_rate_limit on your OS */ #undef HAVE_MIF6CTL_VIFC_RATE_LIMIT /* Define to 1 if the struct mif6ctl has a member vifc_threshold on your OS */ #undef HAVE_MIF6CTL_VIFC_THRESHOLD /* Define to 1 if you have the header file. */ #undef HAVE_NETINET6_IP6_MROUTE_H /* Define to 1 if you have the header file. */ #undef HAVE_NETINET_IN_H /* Define to 1 if you have the header file. */ #undef HAVE_NETINET_IP_MROUTE_H /* Define to 1 if you have the header file. */ #undef HAVE_NET_ROUTE_H /* Define to 1 if you have the `select' function. */ #undef HAVE_SELECT /* Define to 1 if the struct sockaddr_un has a member sun_len on your OS */ #undef HAVE_SOCKADDR_UN_SUN_LEN /* Define to 1 if you have the `socket' function. */ #undef HAVE_SOCKET /* Define to 1 if you have the header file. */ #undef HAVE_STDINT_H /* Define to 1 if you have the header file. */ #undef HAVE_STDLIB_H /* Define to 1 if you have the `strchr' function. */ #undef HAVE_STRCHR /* Define to 1 if you have the `strerror' function. */ #undef HAVE_STRERROR /* Define to 1 if you have the header file. */ #undef HAVE_STRINGS_H /* Define to 1 if you have the header file. */ #undef HAVE_STRING_H /* Define to 1 if you have the `strrchr' function. */ #undef HAVE_STRRCHR /* Define to 1 if you have the header file. */ #undef HAVE_SYSLOG_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_IOCTL_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_PARAM_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_SELECT_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_SOCKET_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_STAT_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_TYPES_H /* Define to 1 if you have the header file. */ #undef HAVE_UNISTD_H /* Define to 1 if you have the `vfork' function. */ #undef HAVE_VFORK /* Define to 1 if you have the header file. */ #undef HAVE_VFORK_H /* Define to 1 if `fork' works. */ #undef HAVE_WORKING_FORK /* Define to 1 if `vfork' works. */ #undef HAVE_WORKING_VFORK /* Define to the address where bug reports for this package should be sent. */ #undef PACKAGE_BUGREPORT /* Define to the full name of this package. */ #undef PACKAGE_NAME /* Define to the full name and version of this package. */ #undef PACKAGE_STRING /* Define to the one symbol short name of this package. */ #undef PACKAGE_TARNAME /* Define to the home page for this package. */ #undef PACKAGE_URL /* Define to the version of this package. */ #undef PACKAGE_VERSION /* Define to the type of arg 1 for `select'. */ #undef SELECT_TYPE_ARG1 /* Define to the type of args 2, 3 and 4 for `select'. */ #undef SELECT_TYPE_ARG234 /* Define to the type of arg 5 for `select'. */ #undef SELECT_TYPE_ARG5 /* Define to 1 if the `setpgrp' function takes no argument. */ #undef SETPGRP_VOID /* Define to 1 if you have the ANSI C header files. */ #undef STDC_HEADERS /* Define for Solaris 2.5.1 so the uint32_t typedef from , , or is not used. If the typedef were allowed, the #define below would cause a syntax error. */ #undef _UINT32_T /* Define to empty if `const' does not conform to ANSI C. */ #undef const /* Define to `__inline__' or `__inline' if that's what the C compiler calls it, or to nothing if 'inline' is not supported under any name. */ #ifndef __cplusplus #undef inline #endif /* Define to rpl_malloc if the replacement function should be used. */ #undef malloc /* Define to `int' if does not define. */ #undef pid_t /* Define to the type of an unsigned integer type of width exactly 32 bits if such a type exists and the standard includes do not define it. */ #undef uint32_t /* Define as `fork' if `vfork' does not work. */ #undef vfork smcroute-0.95/src/mcsender.c0000644000175000017500000001104611620027423014766 0ustar michamicha/* ** smcroute - static multicast routing control ** Copyright (C) 2001-2005 Carsten Schill ** Copyright (C) 2006-2008 Julien BLACHE ** Copyright (C) 2009 Todd Hayton ** ** 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 ** ** $Id: mcsender.c 91 2011-08-08 18:46:43Z micha $ ** ** Multicast test tool ** */ #include #include #include #include "mclab.h" int do_debug_logging = 0; const char Usage[] = "mcsender [-t] [-i] \n"; 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); 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; 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, " %u", &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; } } { 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 ); } } exit( 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" ); } smcroute-0.95/src/Makefile.in0000644000175000017500000000156311620011471015066 0ustar michamicha## smcroute - static multicast routing control ## Copyright (C) 2001-2005 Carsten Schill ## Copyright (C) 2006-2009 Julien BLACHE ## Copyright (C) 2009 Todd Hayton ## Copyright (C) 2009-2011 Micha Lenk CC = @CC@ CFLAGS = @CFLAGS@ BINDIR = /usr/sbin #CFLAGS = -g -O2 -Wall #CFLAGS = -g -Wall -DHOST_OS_LINUX -DHAVE_LINUX_MROUTE6_H default : build.h smcroute all : smcroute mcsender clean : rm -f *~ *.o *.asm build.h smcroute mcsender install : mkdir -p ${BINDIR} cp smcroute mcsender ${BINDIR} mcsender: mcsender.o syslog.o lib.o config.h smcroute: smcroute.o mroute-api.o ifvc.o cmdpkt.o ipc.o syslog.o udpsock.o mcgroup.o lib.o smcroute.c : build.h config.h build.h : echo '#define BUILD "' `date +%y%m%d` '"' >build.h config.h: @echo "Please run ./configure first" smcroute-0.95/src/configure.ac0000644000175000017500000000741711620016331015313 0ustar michamicha# -*- Autoconf -*- # Process this file with autoconf to produce a configure script. AC_PREREQ(2.61) AC_INIT(smcroute, 0.95, micha@debian.org) AC_CONFIG_SRCDIR([mclab.h]) AC_CONFIG_HEADER([config.h]) AC_CONFIG_FILES([Makefile]) # Checks for programs. AC_PROG_CC # Checks for libraries. # Checks for header files. AC_HEADER_STDC AC_CHECK_HEADERS([arpa/inet.h fcntl.h netinet/in.h stdlib.h string.h \ sys/ioctl.h sys/socket.h syslog.h unistd.h \ net/route.h sys/param.h ifaddrs.h]) AC_CHECK_HEADERS([linux/mroute.h], [], [], [ #ifdef HAVE_SYS_SOCKET_H #include #endif #ifdef HAVE_NETINET_IN_H #include #endif ]) AC_CHECK_HEADERS([linux/mroute6.h], [], [], [ #ifdef HAVE_SYS_SOCKET_H #include #endif #ifdef HAVE_NETINET_IN_H #include #endif ]) AC_CHECK_HEADERS([linux/sockios.h]) AC_CHECK_HEADERS([netinet/ip_mroute.h], [], [], [ #ifdef HAVE_NETINET_IN_H #include #endif #ifdef HAVE_NET_ROUTE_H #include #endif ]) AC_CHECK_HEADERS([netinet6/ip6_mroute.h], [], [], [ #ifdef HAVE_NETINET_IN_H #include #endif #ifdef HAVE_SYS_PARAM_H #include #endif ]) AC_MSG_CHECKING(for IPv6 multicast host support) AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( [[ #ifdef HAVE_SYS_SOCKET_H #include #endif #ifdef HAVE_NETINET_IN_H #include #endif ]], [[ struct ipv6_mreq mreq; ]])], [AC_DEFINE(HAVE_IPV6_MULTICAST_HOST, 1, [Define to 1 if your OS supports acting as an IPv6 multicast host]) AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)]) AC_MSG_CHECKING(for IPv6 multicast routing support) AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( [[ #ifdef HAVE_SYS_SOCKET_H #include #endif #ifdef HAVE_NETINET_IN_H #include #endif #ifdef HAVE_LINUX_MROUTE6_H #include #endif #ifdef HAVE_SYS_PARAM_H #include #endif #ifdef HAVE_NETINET6_IP6_MROUTE_H #include #endif ]], [[ int dummy = MRT6_INIT; ]])], [AC_DEFINE(HAVE_IPV6_MULTICAST_ROUTING, 1, [Define to 1 if your OS supports IPv6 multicast routing]) AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)]) # Checks for typedefs, structures, and compiler characteristics. AC_C_CONST AC_C_INLINE AC_TYPE_UINT32_T AC_MSG_CHECKING(for sun_len member in struct sockaddr_un) AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( [[ #include ]], [[ struct sockaddr_un dummy; dummy.sun_len = 0; ]])], [AC_DEFINE(HAVE_SOCKADDR_UN_SUN_LEN, 1, [Define to 1 if the struct sockaddr_un has a member sun_len on your OS]) AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)]) AC_MSG_CHECKING(for vifc_threshold member in struct mif6ctl) AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( [[ #ifdef HAVE_LINUX_MROUTE6_H #include #endif #ifdef HAVE_NETINET6_IP6_MROUTE_H #include #endif ]], [[ struct mif6ctl dummy; dummy.vifc_threshold = 1; ]])], [AC_DEFINE(HAVE_MIF6CTL_VIFC_THRESHOLD, 1, [Define to 1 if the struct mif6ctl has a member vifc_threshold on your OS]) AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)]) AC_MSG_CHECKING(for vifc_rate_limit member in struct mif6ctl) AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( [[ #ifdef HAVE_LINUX_MROUTE6_H #include #endif #ifdef HAVE_NETINET6_IP6_MROUTE_H #include #endif ]], [[ struct mif6ctl dummy; dummy.vifc_rate_limit = 1; ]])], [AC_DEFINE(HAVE_MIF6CTL_VIFC_RATE_LIMIT, 1, [Define to 1 if the struct mif6ctl has a member vifc_rate_limit on your OS]) AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)]) # Checks for library functions. AC_FUNC_FORK AC_PROG_GCC_TRADITIONAL AC_FUNC_MALLOC AC_FUNC_SELECT_ARGTYPES AC_FUNC_SETPGRP AC_CHECK_FUNCS([atexit dup2 memset select socket strchr strerror strrchr]) AC_OUTPUT smcroute-0.95/src/mcgroup.c0000644000175000017500000001112711620011471014636 0ustar michamicha/* ** smcroute - static multicast routing control ** Copyright (C) 2001-2005 Carsten Schill ** Copyright (C) 2006-2009 Julien BLACHE ** Copyright (C) 2009 Todd Hayton ** ** 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 ** ** $Id: mcgroup.c 85 2011-08-08 16:47:53Z micha $ ** ** This module contains the remaining functions that where not placed in ** separate modules ** */ #include "mclab.h" static int joinleave4( int, int, const char *, struct in_addr ); static int joinleave6( int, int, const char *, struct in6_addr ); int joinMcGroup4( int UdpSock, const char *IfName, struct in_addr McAdr ) /* ** Joins the MC group with the address 'McAdr' on the interface 'IfName'. ** The join is bound to the UDP socket 'UdpSock', 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 */ { return joinleave4( 'j', UdpSock, IfName, McAdr ); } int leaveMcGroup4( int UdpSock, const char *IfName, struct in_addr McAdr ) /* ** Leaves the MC group with the address 'McAdr' on the interface 'IfName'. ** ** returns: - 0 if the function succeeds ** - 1 if parameters are wrong or the join fails */ { return joinleave4( 'l', UdpSock, IfName, McAdr ); } int joinMcGroup6( int UdpSock, const char *IfName, struct in6_addr McAdr ) /* ** Joins the MC group with the address 'McAdr' on the interface 'IfName'. ** The join is bound to the UDP socket 'UdpSock', 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 */ { return joinleave6( 'j', UdpSock, IfName, McAdr ); } int leaveMcGroup6( int UdpSock, const char *IfName, struct in6_addr McAdr ) /* ** Leaves the MC group with the address 'McAdr' on the interface 'IfName'. ** ** returns: - 0 if the function succeeds ** - 1 if parameters are wrong or the join fails */ { return joinleave6( 'l', UdpSock, IfName, McAdr ); } static int joinleave4( int Cmd, int UdpSock, const char *IfName, struct in_addr McAdr ) /* ** */ { struct ip_mreq CtlReq; struct IfDesc *IfDp = getIfByName( IfName ); const char *CmdSt = Cmd == 'j' ? "join" : "leave"; if( ! IfDp ) { smclog( LOG_WARNING, 0, "%sMcGroup, unknown interface %s", CmdSt, IfName ); return 1; } CtlReq.imr_multiaddr.s_addr = McAdr.s_addr; CtlReq.imr_interface.s_addr = IfDp->InAdr.s_addr; { char FmtBu[ INET_ADDRSTRLEN ]; smclog( LOG_NOTICE, 0, "%sMcGroup: %s on %s", CmdSt, inet_ntop( AF_INET, &McAdr, FmtBu, sizeof( FmtBu ) ), IfDp ? IfDp->Name : "" ); } if( setsockopt( UdpSock, IPPROTO_IP, Cmd == 'j' ? IP_ADD_MEMBERSHIP : IP_DROP_MEMBERSHIP, (void *)&CtlReq, sizeof( CtlReq ) ) ) { smclog( LOG_WARNING, errno, "%s MEMBERSHIP failed", Cmd == 'j' ? "ADD" : "DROP" ); return 1; } return 0; } static int joinleave6( int Cmd, int UdpSock, const char *IfName, struct in6_addr McAdr ) /* ** */ { #ifndef HAVE_IPV6_MULTICAST_HOST return 0; #else struct ipv6_mreq CtlReq; struct IfDesc *IfDp = getIfByName( IfName ); const char *CmdSt = Cmd == 'j' ? "join" : "leave"; if( ! IfDp ) { smclog( LOG_WARNING, 0, "%sMcGroup, unknown interface %s", CmdSt, IfName ); return 1; } CtlReq.ipv6mr_multiaddr = McAdr; CtlReq.ipv6mr_interface = IfDp->IfIndex; { char FmtBu[ INET6_ADDRSTRLEN ]; smclog( LOG_NOTICE, 0, "%sMcGroup: %s on %s", CmdSt, inet_ntop( AF_INET6, &McAdr, FmtBu, sizeof( FmtBu ) ), IfDp ? IfDp->Name : "" ); } if( setsockopt( UdpSock, IPPROTO_IPV6, Cmd == 'j' ? IPV6_JOIN_GROUP : IPV6_LEAVE_GROUP, (void *)&CtlReq, sizeof( CtlReq ) ) ) { smclog( LOG_WARNING, errno, "%s MEMBERSHIP failed", Cmd == 'j' ? "ADD" : "DROP" ); return 1; } return 0; #endif /* HAVE_IPV6_MULTICAST_HOST */ } smcroute-0.95/src/_mcclient.c0000644000175000017500000000234510447230526015133 0ustar michamicha/* ** smcroute - static multicast routing control ** Copyright (C) 2001-2005 Carsten Schill ** Copyright (C) 2006 Julien BLACHE ** ** 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 ** ** $Id: _mcclient.c 17 2006-06-24 12:34:30Z jblache $ ** ** Multicast test tool ** */ #include "mclab.h" int main() { int UdpSock = openUdpSocket( 0x010a0a0a, 7 ); // buildIfVc(); // brauch ich diesen Call ???? joinMcGroup( UdpSock, "eth0", 0xe1e1e1e1 ); printf( "\nEnter for end\n" ); getchar(); close( UdpSock ); return 0; } smcroute-0.95/src/udpsock.c0000644000175000017500000000324010447230526014641 0ustar michamicha/* ** smcroute - static multicast routing control ** Copyright (C) 2001-2005 Carsten Schill ** Copyright (C) 2006 Julien BLACHE ** ** 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 ** ** $Id: udpsock.c 17 2006-06-24 12:34:30Z jblache $ ** ** This module contains UDP socket function(s) ** */ #include "mclab.h" int openUdpSocket( uint32 PeerInAdr, uint16 PeerPort ) /* ** Creates and connects a simple UDP socket to the target ** 'PeerInAdr':'PeerPort' ** ** returns: - the opened socket ** */ { int Sock; struct sockaddr_in SockAdr; if( (Sock = socket( AF_INET, SOCK_DGRAM, 0 )) < 0 ) smclog( LOG_ERR, errno, "UDP socket open" ); SockAdr.sin_family = AF_INET; SockAdr.sin_port = PeerPort; SockAdr.sin_addr.s_addr = PeerInAdr; memset( &SockAdr.sin_zero, 0, sizeof( SockAdr.sin_zero ) ); if( connect( Sock, (struct sockaddr *)&SockAdr, sizeof( SockAdr ) ) ) smclog( LOG_ERR, errno, "UDP socket connect" ); return Sock; } smcroute-0.95/src/mroute-api.c0000644000175000017500000003074011620011471015246 0ustar michamicha/* ** smcroute - static multicast routing control ** Copyright (C) 2001-2005 Carsten Schill ** Copyright (C) 2006-2009 Julien BLACHE ** Copyright (C) 2009 Todd Hayton ** Copyright (C) 2009-2011 Micha Lenk ** ** 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 ** ** $Id: mroute-api.c 85 2011-08-08 16:47:53Z micha $ ** ** This module contains the interface routines to the Linux mrouted API ** */ #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 "constants don't match, correct mclab.h" #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 "constants don't match, correct mclab.h" #endif #endif /* * Need a raw IGMP socket as interface for the IPv4 mrouted API * Receives IGMP packets and kernel upcall messages. */ int MRouterFD4; #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 MRouterFD6; #endif /* IPv4 internal virtual interfaces (VIF) descriptor vector */ static struct VifDesc { struct IfDesc *IfDp; } VifDescVc[ MAXVIFS ]; #ifdef HAVE_IPV6_MULTICAST_ROUTING /* IPv6 internal virtual interfaces (VIF) descriptor vector */ static struct MifDesc { struct IfDesc *IfDp; } MifDescVc[ MAXMIFS ]; #endif /******************************************************************** * IPv4 *******************************************************************/ int enableMRouter4() /* ** Initialises the mrouted API and locks it by this exclusively. ** ** returns: - 0 if the functions succeeds ** - the errno value for non-fatal failure condition */ { int Va = 1; if( (MRouterFD4 = socket( AF_INET, SOCK_RAW, IPPROTO_IGMP )) < 0 ) { int err = errno; smclog( LOG_INIT, errno, "IGMP socket open" ); return err; } if( setsockopt( MRouterFD4, IPPROTO_IP, MRT_INIT, (void *)&Va, sizeof( Va ) ) ) { int err = errno; close( MRouterFD4 ); MRouterFD4 = -1; return err; } /* Initialize virtual interface table */ memset(&VifDescVc, 0, sizeof(VifDescVc)); return 0; } void disableMRouter4() /* ** Diables the mrouted API and relases by this the lock. ** */ { if( MRouterFD4 < 0 ) return; if( setsockopt( MRouterFD4, IPPROTO_IP, MRT_DONE, NULL, 0 ) ) smclog( LOG_ERR, errno, "MRT_DONE" ); close( MRouterFD4 ); MRouterFD4 = -1; } void addVIF( struct IfDesc *IfDp ) /* ** Adds the interface '*IfDp' as virtual interface to the mrouted API ** */ { struct vifctl VifCtl; int VifIndex = -1; int i; /* search free VifDesc */ for (i=0; i < MAXVIFS; i++) { if ( !VifDescVc[i].IfDp ) { VifIndex = i; break; } } /* no more space */ if( VifIndex == -1 ) { smclog( LOG_ERR, ENOMEM, "addVIF, out of VIF space" ); return; } VifDescVc[VifIndex].IfDp = IfDp; memset(&VifCtl, 0, sizeof(VifCtl)); VifCtl.vifc_vifi = VifIndex; VifCtl.vifc_flags = 0; /* no tunnel, no source routing, register ? */ VifCtl.vifc_threshold = 1; /* Packet TTL must be at least 1 to pass them */ VifCtl.vifc_rate_limit = 0; /* hopefully no limit */ VifCtl.vifc_lcl_addr.s_addr = IfDp->InAdr.s_addr; VifCtl.vifc_rmt_addr.s_addr = INADDR_ANY; smclog( LOG_NOTICE, 0, "adding VIF, Vif-Ix %d Fl 0x%04x IP 0x%08x %s", VifCtl.vifc_vifi, VifCtl.vifc_flags, VifCtl.vifc_lcl_addr.s_addr, IfDp->Name ); if( setsockopt( MRouterFD4, IPPROTO_IP, MRT_ADD_VIF, (void *)&VifCtl, sizeof( VifCtl ) ) ) smclog( LOG_ERR, errno, "MRT_ADD_VIF %s", IfDp->Name ); else IfDp->VifIndex = VifIndex; } int addMRoute4( struct MRoute4Desc *Dp ) /* ** Adds the multicast routed '*Dp' to the kernel routes ** ** returns: - 0 if the function succeeds ** - the errno value for non-fatal failure condition */ { struct mfcctl CtlReq; int ret = 0; memset(&CtlReq, 0, sizeof(CtlReq)); CtlReq.mfcc_origin = Dp->OriginAdr; CtlReq.mfcc_mcastgrp = Dp->McAdr; CtlReq.mfcc_parent = Dp->InVif; /* copy the TTL vector */ if( sizeof( CtlReq.mfcc_ttls ) != sizeof( Dp->TtlVc ) || VCMC( CtlReq.mfcc_ttls ) != VCMC( Dp->TtlVc ) ) smclog( LOG_ERR, 0, "data types doesn't match in " __FILE__ ", source adaption needed !" ); memcpy( CtlReq.mfcc_ttls, Dp->TtlVc, sizeof( CtlReq.mfcc_ttls ) ); { char FmtBuO[ INET_ADDRSTRLEN ], FmtBuM[ INET_ADDRSTRLEN ]; smclog( LOG_NOTICE, 0, "adding MFC: %s -> %s, InpVIf: %d", inet_ntop( AF_INET, &CtlReq.mfcc_origin, FmtBuO, INET_ADDRSTRLEN ), inet_ntop( AF_INET, &CtlReq.mfcc_mcastgrp, FmtBuM, INET_ADDRSTRLEN ), CtlReq.mfcc_parent ); } if( setsockopt( MRouterFD4, IPPROTO_IP, MRT_ADD_MFC, (void *)&CtlReq, sizeof( CtlReq ) ) ) { ret = errno; smclog( LOG_WARNING, errno, "MRT_ADD_MFC" ); } return ret; } int delMRoute4( struct MRoute4Desc *Dp ) /* ** Removes the multicast routed '*Dp' from the kernel routes ** ** returns: - 0 if the function succeeds ** - the errno value for non-fatal failure condition */ { struct mfcctl CtlReq; int ret = 0; memset(&CtlReq, 0, sizeof(CtlReq)); CtlReq.mfcc_origin = Dp->OriginAdr; CtlReq.mfcc_mcastgrp = Dp->McAdr; { char FmtBuO[ INET_ADDRSTRLEN ], FmtBuM[ INET_ADDRSTRLEN ]; smclog( LOG_NOTICE, 0, "removing MFC: %s -> %s", inet_ntop( AF_INET, &CtlReq.mfcc_origin, FmtBuO, INET_ADDRSTRLEN ), inet_ntop( AF_INET, &CtlReq.mfcc_mcastgrp, FmtBuM, INET_ADDRSTRLEN ) ); } if( setsockopt( MRouterFD4, IPPROTO_IP, MRT_DEL_MFC, (void *)&CtlReq, sizeof( CtlReq ) ) ) { ret = errno; smclog( LOG_WARNING, errno, "MRT_DEL_MFC" ); } return ret; } int getVifIx( struct IfDesc *IfDp ) /* ** Returns for the virtual interface index for '*IfDp' ** ** returns: - the virtual interface index if the interface is registered ** - -1 if no virtual interface exists for the interface ** */ { if (IfDp == NULL) return -1; return IfDp->VifIndex; } /******************************************************************** * IPv6 *******************************************************************/ int enableMRouter6() /* ** Initialises the mrouted API and locks it by this exclusively. ** ** returns: - 0 if the functions succeeds ** - the errno value for non-fatal failure condition */ { #ifndef HAVE_IPV6_MULTICAST_ROUTING return 0; #else int Va = 1; if( (MRouterFD6 = socket( AF_INET6, SOCK_RAW, IPPROTO_ICMPV6 )) < 0 ) { int err = errno; smclog( LOG_INIT, errno, "ICMPv6 socket open" ); return err; } if( setsockopt( MRouterFD6, IPPROTO_IPV6, MRT6_INIT, (void *)&Va, sizeof( Va ) ) ) { int err = errno; close( MRouterFD6 ); MRouterFD6 = -1; return err; } /* * 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 */ { int fd; char * file = "/proc/sys/net/ipv6/conf/all/mc_forwarding"; fd = open( file, O_WRONLY ); if ( fd < 0 ) { if ( errno != EACCES ) smclog( LOG_ERR, errno, "open(%s)", file); } else { (void) write( fd, "1", 1 ); (void) close( fd ); } } return 0; #endif /* HAVE_IPV6_MULTICAST_ROUTING */ } void disableMRouter6() /* ** Diables the mrouted API and relases by this the lock. ** */ { #ifndef HAVE_IPV6_MULTICAST_ROUTING return; #else if( MRouterFD6 < 0 ) return; if( setsockopt( MRouterFD6, IPPROTO_IPV6, MRT6_DONE, NULL, 0 ) ) smclog( LOG_ERR, errno, "MRT6_DONE" ); close( MRouterFD6 ); MRouterFD6 = -1; #endif /* HAVE_IPV6_MULTICAST_ROUTING */ } void addMIF( struct IfDesc *IfDp ) /* ** Adds the interface '*IfDp' as virtual interface to the mrouted API ** */ { #ifndef HAVE_IPV6_MULTICAST_ROUTING return; #else struct mif6ctl MifCtl; struct MifDesc *MifDp; memset(&MifCtl, 0, sizeof(MifCtl)); /* search free MifDesc */ for( MifDp = MifDescVc; MifDp < VCEP( MifDescVc ); MifDp++ ) { if( ! MifDp->IfDp ) break; } /* no more space */ if( MifDp >= VCEP( MifDescVc ) ) smclog( LOG_ERR, ENOMEM, "addMIF, out of MIF space" ); MifDp->IfDp = IfDp; MifCtl.mif6c_mifi = MifDp - MifDescVc; MifCtl.mif6c_flags = 0; /* no register */ #ifdef HAVE_MIF6CTL_VIFC_THRESHOLD MifCtl.vifc_threshold = 1; /* Packet TTL must be at least 1 to pass them */ #endif MifCtl.mif6c_pifi = IfDp->IfIndex; /* physical interface index */ #ifdef HAVE_MIF6CTL_VIFC_RATE_LIMIT MifCtl.vifc_rate_limit = 0; /* hopefully no limit */ #endif smclog( LOG_NOTICE, 0, "adding MIF, Mif-Ix %d PHY Ix %d Fl 0x%x %s", MifCtl.mif6c_mifi, MifCtl.mif6c_pifi, MifCtl.mif6c_flags, MifDp->IfDp->Name ); if( setsockopt( MRouterFD6, IPPROTO_IPV6, MRT6_ADD_MIF, (char *)&MifCtl, sizeof( MifCtl ) ) ) smclog( LOG_ERR, errno, "MRT6_ADD_MIF %s", IfDp->Name ); #endif /* HAVE_IPV6_MULTICAST_ROUTING */ } int addMRoute6( struct MRoute6Desc *Dp ) /* ** Adds the multicast routed '*Dp' to the kernel routes ** ** returns: - 0 if the function succeeds ** - the errno value for non-fatal failure condition */ { #ifndef HAVE_IPV6_MULTICAST_ROUTING return 0; #else struct mf6cctl CtlReq; int ret = 0; int MifIx = 0; memset(&CtlReq, 0, sizeof(CtlReq)); CtlReq.mf6cc_origin = Dp->OriginAdr; CtlReq.mf6cc_mcastgrp = Dp->McAdr; CtlReq.mf6cc_parent = Dp->InMif; /* copy the outgoing MIFs */ for ( MifIx = 0; MifIx < MAX_MC_MIFS; MifIx++ ) { if ( Dp->TtlVc[ MifIx ] > 0 ) IF_SET( MifIx, &CtlReq.mf6cc_ifset ); } { char FmtBuO[ INET6_ADDRSTRLEN ], FmtBuM[ INET6_ADDRSTRLEN ]; smclog( LOG_NOTICE, 0, "adding MFC: %s -> %s, InpMIf: %d", inet_ntop( AF_INET6, &CtlReq.mf6cc_origin.sin6_addr, FmtBuO, INET6_ADDRSTRLEN ), inet_ntop( AF_INET6, &CtlReq.mf6cc_mcastgrp.sin6_addr, FmtBuM, INET6_ADDRSTRLEN ), CtlReq.mf6cc_parent ); } if( setsockopt( MRouterFD6, IPPROTO_IPV6, MRT6_ADD_MFC, (void *)&CtlReq, sizeof( CtlReq ) ) ) { ret = errno; smclog( LOG_WARNING, errno, "MRT6_ADD_MFC" ); } return ret; #endif /* HAVE_IPV6_MULTICAST_ROUTING */ } int delMRoute6( struct MRoute6Desc *Dp ) /* ** Removes the multicast routed '*Dp' from the kernel routes ** ** returns: - 0 if the function succeeds ** - the errno value for non-fatal failure condition */ { #ifndef HAVE_IPV6_MULTICAST_ROUTING return 0; #else struct mf6cctl CtlReq; int ret = 0; memset(&CtlReq, 0, sizeof(CtlReq)); CtlReq.mf6cc_origin = Dp->OriginAdr; CtlReq.mf6cc_mcastgrp = Dp->McAdr; { char FmtBuO[ INET_ADDRSTRLEN ], FmtBuM[ INET_ADDRSTRLEN ]; smclog( LOG_NOTICE, 0, "removing MFC: %s -> %s", inet_ntop( AF_INET6, &CtlReq.mf6cc_origin.sin6_addr, FmtBuO, INET6_ADDRSTRLEN ), inet_ntop( AF_INET6, &CtlReq.mf6cc_mcastgrp.sin6_addr, FmtBuM, INET6_ADDRSTRLEN ) ); } if( setsockopt( MRouterFD6, IPPROTO_IPV6, MRT6_DEL_MFC, (void *)&CtlReq, sizeof( CtlReq ) ) ) { ret = errno; smclog( LOG_WARNING, errno, "MRT_DEL_MFC" ); } return ret; #endif /* HAVE_IPV6_MULTICAST_ROUTING */ } int getMifIx( struct IfDesc *IfDp ) /* ** Returns for the virtual interface index for '*IfDp' ** ** returns: - the virtual interface index if the interface is registered ** - -1 if no virtual interface exists for the interface ** */ { #ifndef HAVE_IPV6_MULTICAST_ROUTING return -1; #else struct MifDesc *Dp; for( Dp = MifDescVc; Dp < VCEP( MifDescVc ); Dp++ ) if( Dp->IfDp == IfDp ) return Dp - MifDescVc; return -1; #endif /* HAVE_IPV6_MULTICAST_ROUTING */ }