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Change Log

All relevant, user visible, changes are documented in this file.

[v2.3][] - 2024-04-21

Changes

  • Add IGMP proto support for raw VLAN interfaces
  • New mctl show mdb command
  • New mctl check command to probe for required tools
  • All mctl commands now run mctl check internally to ensure required tools are available
  • Refactored logging, all log messages affected and may have been altered in their output, and severity
  • Add configure support for setting IPC socket group ID when mcd creates its IPC socket, useful to provide wheel group access

Fixes

  • Fix router port detection for VLAN filtering bridges
  • Fix duplicate log message on send_igmp() failure
  • Fix time_t -> int misuse, found by Coverity Scan
  • Fix uninitialized scalars, found by Coverity Scan
  • Fix resource leak, found by Coverity Scan
  • Fix possible out-of-bounds write, found by Coverity Scan
  • Fix possible out-of-bounds access, found by Coverity Scan
  • Fix build warnings, removing unused functions and adjusting levels

[v2.2][] - 2024-04-17

Changes

  • Document required tools for installation
  • Add support for MCD_SOCK environment variable
  • Add helper tools for manual testing on Linux
  • Hide IGMP robustness value from default mctl show output
  • Improved output from mctl show [json] on multi-bridge systems

Fixes

  • Fix detection of multicast router ports for mctl show
  • Fix detection of IGMP/MLD fast-leave

v2.1 - 2024-04-08

No daemon changes, only mctl output formatting changes.

Changes

  • Include bridge name in multicast group listings
  • Add support for showing IPv6 and MAC multicast groups
  • Minor format adjustments to IGMP/MLD interface view

Fixes

  • Enforce -p (plain) mode for JSON output. Fixes spurious NUL characters in JSON output, added by mctl formatter

v2.0 - 2024-03-21

Complete rewrite of core IGMP parts, nothing left of the original mrouted code base.

Note: breaking changes to .conf file format!

Changes

  • Add support for IGMP query interval per interface
  • IGMP global options renamed with global- prefix
  • Add support for include GLOB directive to .conf parser, see bundled sample mcd.conf for an example
  • Add support for injecting VLAN tagged frames and receiving frames on a VLAN filtering bridge without VLAN interfaces
  • Add support for tracking remote querier's query interval using QQIC
  • Relicense under the ISC license

Fixes

  • Fix output from usage, -h, show correct paths used when program identity changes, also add missing options
  • Add missing linefeed in show igmp json output
  • Fix parsing of max response time (IGMP code field), changed in IGMPv3 to use float encoding for values >= 128
  • Fix JSON output for interface state and querier fields

v1.0 - 2024-03-09

First release under new stewardship.

Changes

  • Project forked and renamed to mcd
  • Add JSON output support
  • Renamed setting proxy-queries to proxy-mode, compat for old setting name remains
  • Use lower-case characters for MAC addresses
  • Update documentation, missing iface settings

Fixes

  • Allow fallback to proxy mode if interface has no address
  • Fix coding style
  • Fix build warnings

v0.10 - 2023-05-30

Changes

  • Add new passive mode, where no queries are sent

v0.9 - 2022-11-24

Fixes

  • Fix memory leak in join handler
  • Fix issue with elements not being removed correctly with TIALQ

v0.8 - 2022-11-21

Fixes

  • Fix ports not sorted when running querierctl
  • Fix router ports not showing if vlan doesn't have router port

v0.7 - 2022-10-10

Fixes

  • Fix use-after-free on machines with unsigned-by-default chars
  • Fix incorrect VID parsing of MDB entries

v0.6 - 2022-07-05

Fixes

  • querierctl: Fix handling of bigger interface indexes in router port parsing

v0.5 - 2022-06-20

Changes

  • Add per interface proxy mode
    • Any interface listed as disabled in configuration is considered a proxy interface
    • Proxy queries (with source 0.0.0.0) are sent until a real querier is detected
    • querierctl shows elected querier for proxy interfaces
  • querierctl: Support for displaying discovered router ports

v0.4 - 2022-02-16

Changes

  • Support for adding/removing interfaces at runtime, with new test
  • Add querierctl tool, with plain text API over UNIX domain socket
    • Shows elected querier per VLAN, querierctl show
    • Shows elected querier timeout
    • Shows which port the elected querier is connected to on bridge
    • Support for displaying bridge mdb show in human-friendly format

Fixes

  • Fix rearming of internal timers, caused wrong querier timeout handling and querierd jumping in too early
  • Never allow link-local addresses to win a querier election
  • Never allow 0.0.0.0 address to win a querier election

v0.3 - 2022-02-08

Changes

  • Add NETLINK support for link up/down and address add/del
    • Enables seamless operation on interfaces with, e.g., DHCP address
    • Allows for bringing up interfaces long after daemon has started
  • Querier timer now operates per interface, starts when interfaces are brought into operation -- configuration remains a global setting
  • Very basic IPC support for querying status from daemon
  • Massive refactor/rename of internal APIs
  • Support for multicast output interface without an address
  • Support for join/leave on interface without an address

v0.2 - 2022-02-04

Changes

  • Add proper /etc/querierd.conf support to change:
    • query interval (QI)
    • query response interval (QRI)
    • query last member interval
    • robustness (QRV)
    • router timeout
    • router alert
    • interface on/off with IGMP version
  • Add sample querierd.conf

Fixes

  • Ignore proxy querys, they must never win elections
  • Query jitter problem of several seconds

v0.1 - 2021-12-01

Initial public release.

Limited IGMPv1/v2/v3 querier with hard-coded query interval, etc. Put interfaces in a .conf file, whitespace separated to enable querier.