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69 lines
2.8 KiB
Markdown
69 lines
2.8 KiB
Markdown
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tinysvcmdns
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============
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tinysvcmdns is a tiny MDNS responder implementation for publishing services.
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This implementation is only concerned with publishing services, without a
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system-wide daemon like Bonjour or Avahi. Its other goal is to be extremely
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small, embeddable, and have no external dependencies.
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It only answers queries related to its own hostname (the A record), the
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service PTRs, and the "_services.dns-sd._udp.local" name, which advertises
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all services on a particular host.
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Services consist of a single SRV and TXT record.
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Decoding of MDNS packets is only done to retrieve the questions and answer RRs.
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The purpose for decoding answer RRs is to make sure the service PTR is not
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sent out if it is already included in the answer RRs.
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It also only utilizes multicast packets, so no "QU" queries are accepted.
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There is no name collision detection, so this means no queries are generated
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before publishing the services. However compliant responders will avoid using
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our names, since the implementation will respond to queries that match our
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name.
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TODO
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-----
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* better, more stable & complete API
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* name collision detection
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FILES
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------
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* mdns.c - provides data structures, parsing & encoding of MDNS packets
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* mdnsd.c - implements the server socket, communication and thread
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* testmdnsd.c - an example that creates an instance until terminated
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LICENSE
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--------
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tinysvcmdns is licensed under the 3-clause ("modified") BSD License.
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Copyright (C) 2011 Darell Tan
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. The name of the author may not be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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