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SMCRoute v2.1.0
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@troglobit troglobit released this 17 Feb 21:16
· 1096 commits to master since this release
2.1.0
9324e3e

Maybe most menacing massively majestic multicast managing monster

Changes

  • Allow more interfaces to be used for multicast routing, in particular on Linux, where interfaces without an IP address can now be used! Making it possible to run SMCRoute on DHCP/PPP interfaces, issue #13

  • Add support for TTL scoping on interfaces, very useful for filtering multicast without a firewall: phyint IFNAME ttl-threshold TTL

  • On Linux a socket filter now filters out ALL traffic on the helper sockets where SMCRoute does IGMP/MLD join/leave on multicast groups. This should eliminate the extra overhad required to, not only route streams, but also send a copy of each packet to SMCRoute.

  • Add support for limiting the amount of multicast interfaces (VIFs) SMCRoute creates at startup. Two options are now available, by default all multicast capable interfaces are given a VIF and the user can selectively disable them one by one. However, if the -N command line option is given SMCRoute does not enable any VIFs by default, the user must then selectively enable interface one by one. The syntax in the config file is:

    phyint IFNAME <enable|disable>

    Use enable per interface with -N option, or disable by default.

  • Make build ID optional. SMCRoute has always had the build date hard coded in the binary. This change makes this optional, and defaults to disabled, to facilitate reproducible builds. For more info, see https://wiki.debian.org/ReproducibleBuilds, by @bombadil

  • Remove generated files from GIT. Files generated by GNU autotools are now only part of the distribution archive, not the GIT repository. Use ./autogen.sh to create the required files when using GIT

  • Updated man page and example smcroute.conf with limitations on the amount of mgroup rules

  • Add support for executing an external script on config reload and when installing a multicast route. Issue #14

    smcroute -e /path/to/cmd

    The script is called when SMCRoute has started up, or has received SIGHUP and just reloaded the configuration file, and when a new source-less rule have been installed. See the documentation for more information on set environment variables etc. Issue #14

  • Add --disable-ipv6 option to configure script. Disables IPv6 support in SMCRoute even though the kernel may support it

  • Replaced -D option with -L LVL to alter log level, issue #24

  • The smcroute daemon now behaves more like a regular UNIX daemon. It defaults to using syslog when running in the background and stderr when running in the foreground. A new option -s can be used to enable syslog when running in the foreground, issue #25

  • The smcroute client no longer use syslog, only stderr, issue #25

  • When starting the smcroute daemon it is no longer possible to also send client commands on the same command line.

  • Remove the (unmaintained) in-tree mcsender tool. Both ping(8) and iperf(1) can be used in its stead. The omping(8) tool is another tool, engineered specifically for testing multicast. Issue #30

Fixes

  • Fix issue #10: smcroute client loops forever on command if no smcroute daemon is running
  • Install binaries to /usr/sbin rather than /usr/bin, regression introduced in v2.0.0. Fixed by Micha Lenk, @bombadil
  • Cleanup fix for no-MMU systems. Multicast groups were not properly cleaned up in the atexit() handler -- only affects no-MMU systems
  • Do not force automake v1.11, only require at least v.11
  • SMCRoute operates fine without a config file, so use a less obtrusive warning message for missing /etc/smcroute.conf
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