Jeremie Miller's original mDNS/mDNS-SD library daemon.
Download a relased tarball (not a GitHub zip) to unlock a fully supported version. Hardcore devs. can proceed to clone the GIT repository, see below for help.
mdnsd by default reads service definitions from /etc/mdns.d/*, but a
different path can be given, which may be a directory or a single file.
Usage: mdnsd [-hnv] [-a ADDRESS] [-l LEVEL] [PATH]
-a ADDR Address of service/host to announce, default: auto
-h This help text
-i IFACE Interface to announce services on, and get address from
-l LEVEL Set log level: none, err, notice (default), info, debug
-n Run in foreground, do not detach from controlling terminal
-p Persistent mode, retry if the socket or interface is lost
-t TTL Set TTL of mDNS packets, default: 1 (link-local only)
-v Show program version
Bug report address: https://github.com/troglobit/mdnsd/issues
By default mdnsd daemonizes, detaches from the controlling terminal and
continues running in the background, logging errors (or debug messages
if enabled) to the systmem log. There is no output to be expected. On
GNU/Linux, use mdns-scan or Wireshark to verify your setup. Other
operating systems have their own set of tools for mDNS-SD and mdnsd may
not even have a place there.
mdnsd uses the system routing table, specifically the default (unicast)
route, to determine the default interface to use. To run on systems
without a default route, e.g. a link-local only system, use -i IFACE.
Starting mdnsd early in the boot process means the system may not yet
have acquired an IP address, or the interface itself may not even exist
yet, in which case -p may likely also help.
See the file API.md for pointers on how to use the mDNS library.
This section provides a couple of service record examples. The syntax
of the files is fairly free form. Optional directives: name, txt,
target, and cname.
FTP service example:
# /etc/mdns.d/ftp.service -- mDNS-SD advertisement of FTP service
name Troglobit FTP Server
type _ftp._tcp
port 21
txt server=uftpd
txt version=2.6
target ftp.luthien.local
cname ftp.local
HTTP service example:
# /etc/mdns.d/http.service -- mDNS-SD advertisement of HTTP service
name Troglobit HTTP Server
type _http._tcp
port 80
txt server=merecat
txt version=2.31
target www.luthien.local
cname home.local
This project is built for and developed on GNU/Linux systems, but should work on any UNIX like system. Use the standard GNU configure script to create a Makefile for your system and then call make.
./configure
make all
make install
Users who checked out the source from GitHub must run ./autogen.sh
first to create the configure script. This requires GNU autotools and
pkg-config to be installed on the build system.
This mDNS-SD implementation was developed by Jeremie Miller in 2003, originally announced on the rendezvous-dev mailing list. It has many forks and has been used by many other applications over the years.
This GitHub project is an attempt to clean it up, develop it further, and maintain it for the long haul.