From: Roland Hieber <rohieb@rohieb.name>
Date: Sun, 8 Dec 2013 02:53:15 +0000 (+0100)
Subject: sync: finish mdns
X-Git-Tag: erste-version~11
X-Git-Url: https://git.rohieb.name/skm-ma-ws1314.git/commitdiff_plain/a937e7aa8fcc17fb98a80bd0a9362d11b188087f

sync: finish mdns
---

diff --git a/dns-extensions.tex b/dns-extensions.tex
new file mode 100644
index 0000000..1bb5ac0
--- /dev/null
+++ b/dns-extensions.tex
@@ -0,0 +1,39 @@
+\subsection{Extensions to the DNS protocol}
+
+\subsubsection{Multicast DNS}
+\term{Multicast DNS}~\cite{rfc6762} (mDNS) describes an extension of the Domain Name
+System that allows DNS resource records to be distributed on multiple hosts in a
+network, therefore avoiding the need of a central server.
+
+Software that supports resolution of mDNS records listens on the reserved
+link-local multicast address \code{224.0.0.251} (for IPv4 queries) or
+\code{FF02::FB} (for IPv6 queries) on UDP port 5353 for incoming queries.
+Queries sent to those multicast address and port are standard DNS queries, and
+if a host receiving a query knows about the queried resource, it responds to the
+querying host with a standard DNS response. The querying host can then simply
+finish and use the result, or wait until other hosts respond to its query. The
+latter is typically the case when querying for \code{SRV} records to obtain a
+list of services which are present in the network.
+
+Another feature of Multicast DNS is the reduction of traffic through
+\term{Known-Answer Suppression}. It allows a querying host to specify already
+known resources in its query when querying resources that could exist on more
+than one host (e.~g., SRV records). The hosts matching those resources then do
+not generate a response.
+
+Finally, hosts may also send unsolicited responses. This can be used to notify
+the network of new services available on the host.
+
+\pages{1}
+
+\subsubsection{DNS-Based Service Discovery}
+\todo
+\term{DNS-based Service Discovery} \cite{rfc6763}
+\begin{itemize}
+	\item allows flexible mapping of available services to ports
+	\item utilization of SRV \cite{rfc2782}, TXT and PTR records 
+	\item case study for IoT in \cite{Klauck:2012:BCC:2352852.2352881}
+\end{itemize}
+
+\pages{1}
+% vim: set ft=tex et ts=2 sw=2 :
diff --git a/main.tex b/main.tex
index 7044ce7..843e8de 100644
--- a/main.tex
+++ b/main.tex
@@ -29,42 +29,13 @@ going to do
 \section{Prerequisites}
 \todo
 overview to the techniques used in the paper by Klauk and Kirsche
+
+basically: how do we talk to our smart home?
 \cite{klauck-kirsche-chattythings}
 
 \input{address-allocation.tex}
-
-\subsection{DNS-Based Service Discovery}
-\todo
-\cite{rfc6763}
-\begin{itemize}
-	\item allows flexible mapping of available services to ports
-	\item utilization of SRV \cite{rfc2782}, TXT and PTR records 
-	\item case study for IoT in \cite{Klauck:2012:BCC:2352852.2352881}
-\end{itemize}
-
-\pages{1}
-
-\subsection{XMPP}
-\todo
-\cite{rfc6120}
-\begin{itemize}
-	\item architecture: client-server, use of DNS-SD
-	\item addressing: JIDs, resources
-	\item XML-based communication primitives, stanzas and streams
-	\item presence
-	\item publish/subscribe \cite{xep-0060}, roster
-	\item multi-user chats \cite{xep-0045}
-\end{itemize}
-
-\pages{3-4}
-
-\subsection{Multicast DNS}
-\todo
-\cite{rfc6762} \pages{1}
-
-\subsection{XMPP Serverless Messaging}
-\todo
-\cite{xep-0174} \pages{1}
+\input{dns-extensions.tex}
+\input{xmpp.tex}
 
 \section{System Architecture of Chatty Things}
 \todo
diff --git a/xmpp.tex b/xmpp.tex
new file mode 100644
index 0000000..56ed185
--- /dev/null
+++ b/xmpp.tex
@@ -0,0 +1,20 @@
+\subsection{XMPP}
+\todo
+\cite{rfc6120}
+\begin{itemize}
+	\item architecture: client-server, use of DNS-SD
+	\item addressing: JIDs, resources
+	\item XML-based communication primitives, stanzas and streams
+	\item presence
+	\item publish/subscribe \cite{xep-0060}, roster
+	\item multi-user chats \cite{xep-0045}
+\end{itemize}
+
+\pages{3-4}
+
+
+\subsubsection{XMPP Serverless Messaging}
+\todo
+\cite{xep-0174} \pages{1}
+
+% vim: set ft=tex et ts=2 sw=2 :