mirror of
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ca8e846264
The new ios/configure script performs a separate ../configure for each of
the following iOS targets:
iPhoneOS on armv7
iPhoneOS on arm64
iPhoneSimulator on i386
iPhoneSimulator on x86_64
The script then creates ios/Makefile that builds a static iOS Framework
Bundle suitable for inclusion in an Xcode iOS project.
Add the --xcode-sdk=SDK option to configure.ac, to support cross
compiling using Apple Xcode. It prefixes all compile/link toolchain
commands with the "xcrun --sdk SDK" command, ie, CC, AS, LD, AR, RANLIB,
etc.
Re-structure headerfiles.mk to separate "public" from "private" headers,
because the Framework module only exposes the public ones. Moves the
SQLITE3_AMALGAMATION definition from Makefile.in into headerfiles.mk.
Update INSTALL.md and add a technical document for Apple iOS.
This enables development of Serval DNA within the context of an Xcode
iOS project using the standard edit-make-test cycle: after modifying a
Serval DNA source file, "cd ios; make" will recompile the changed file
for all the target architectures and update the Framework Bundle.
Rebuilding the Xcode project will then incorporate the changes, which
can be tested immediately.
208 lines
10 KiB
Markdown
208 lines
10 KiB
Markdown
Serval DNA
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==========
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[Serval Project][], September 2017
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[Serval DNA][] is the core component of the [Serval Mesh][] app for Android and
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the [Serval Mesh Extender][] long-range mesh networking device. It is a daemon
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process that performs all the central services of the Serval mesh network
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such as dynamic routing, encryption and authentication, file distribution,
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messaging, and voice telephony.
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Any device with Wi-Fi connectivity that runs the Serval DNA daemon can
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participate in the [Serval mesh network][].
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Download, build and test
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------------------------
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* [INSTALL.md](./INSTALL.md) contains instructions for downloading, building
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and testing Serval DNA on Linux, Mac OS-X, and similar platforms
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* [Notes for Developers](./doc/Development.md) contains useful information for
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developers of Serval DNA, which may also help resolve build issues
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Configuration
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-------------
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* [doc/Servald-Configuration.md](./doc/Servald-Configuration.md) describes how
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to set up and run a Serval DNA daemon
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Documentation
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-------------
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* [INSTALL.md](./INSTALL.md) -- instructions to compile and install Serval DNA
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* [doc/](./doc/) -- technical documentation
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* once Serval DNA is built, its "help" command will print a summary of all the
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operations that servald offers:
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$ ./servald help
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* the following pages in the [Serval Project Wiki][]:
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* [Serval DNA overview][Serval DNA]
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* [Serval DNA development][]
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* [CONTRIBUTORS.md](./CONTRIBUTORS.md) -- individuals who have contributed to
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the software
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Bugs and issues
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---------------
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Bugs can be reported and inspected using the [GitHub issue tracker][Serval DNA issues].
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What is in this repository?
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---------------------------
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This repository contains:
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* the [GNU C][] source code for the **servald** executable
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* the [Java][] source code for the Serval API
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* the [Swift][] source code for the Serval API
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* [technical documentation](./doc/)
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* a [test framework](./testframework.sh) and [test scripts](./tests/) written
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in [Bash][]
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* various support files for installation and configuration on various
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platforms
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The **servald** executable is a multi-purpose program that can be invoked
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directly from the command line, run as a daemon process, or invoked via [JNI][]
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from within a [Java][] program or via the [Swift module][] from within a
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[Swift][] program. The **servald** executable is really many commands built
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into one; the command-line arguments select which *command* to run. Some
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commands are stand-alone utilities, some start and stop the servald daemon
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process, some communicate with the servald daemon as an MDP client, and others
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via a two-way [pipe][] called the *monitor interface*.
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The following protocols and services are implemented in **servald**:
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* The **[Distributed Numbering Architecture (DNA)][DNA]** is the key
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innovation that makes mesh telephony viable in the absence of any
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infrastructure, eg, in the aftermath of a natural disaster or in remote
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locations. DNA is a protocol carried over MDP (see below) that asks many
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devices at once if they will answer a phone number (DID). A device will
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respond with its own subscriber identity (SID) if its user has “claimed”
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that DID. This allows phone calls to be established over the mesh using
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conventional phone numbers.
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* The **[Serval Keyring][]** is a flat file containing all the user identities
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on a single device. Each identity is a set of elliptic curve secret
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cryptographic keys that belong to a single “mesh subscriber”, indexed by the
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subscriber's 256-bit public key, called a SID. Each identity in the keyring
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is locked by its own user-chosen password (called a PIN in the code and
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documentation), using elliptic curve cryptography to protect locked entries
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from theft or tampering, and steganography to allow the user to plausibly
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deny the existence of locked identities.
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* The **[Mesh Datagram Protocol (MDP)][MDP]** is Serval's own layer 3 protocol
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designed for secure mesh networking. It is completely independent of
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Internet protocols such as IP and UDP, although for the time being it is
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implemented as an “overlay” network based on UDP/IP because that is the
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interface that Linux and other operating systems provide for sending data
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over Wi-Fi. However, MDP could easily be implemented directly over a layer
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2 data link such as Wi-Fi or Ethernet MAC. MDP uses subscribers' public
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keys (SID) as source and destination addresses, has a 32-bit port number
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analogous to the 16-bit port number used in TCP/IP, and encrypts all packet
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contents by default, using the public key (SID) of the destination.
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* The **[Voice over Mesh Protocol (VoMP)][VoMP]** is Serval's own call
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negotiation and two-way audio streaming protocol used to implement mesh
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voice calls. It fills the same role as SIP/RTS, the dominant protocol used
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for Voice over Internet Protocol, but VoMP is designed for the variable and
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unstable conditions of wireless mesh networks. VoMP's session state model
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and signalling can handle packet loss, mid-call re-routing and re-connection
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where SIP would fail. VoMP's audio streaming can encapsulate many codecs
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and even DTMF (dialpad button) signalling.
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* **[Rhizome][]** is a content storage and distribution service implemented
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using SQLite and a content-exchange protocol based on MDP. It can be used
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to disseminate content like images, videos, documents, software upgrades,
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etc. Each piece of content in Rhizome is called a “bundle”, which has two
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parts: a *manifest* that describes the content, and the *payload*, which is
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the content itself. Each bundle has its own unique cryptographic identifier
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that allows any recipient to verify that it has not been tampered with. A
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bundle's payload may be encrypted by the author so that only the designated
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recipient can read it.
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* The **[MeshMS][]** messaging service sends short text messages using Rhizome
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as its transport. Each message thread is stored and carried in a pair of
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journal bundles, one for each direction (ply).
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* **[Serval Infrastructure][]** services may optionally be deployed on any devices
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in the mesh to expose external services to mesh subscribers and vice versa
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(eg, VoIP gateways, SMS satellite links, packetised web), and to overcome
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scalability limitations of a perfectly decentralised mesh (eg, central
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telephone directory). Serval Infrastructure is implemented as a daemon with
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its own executable called `directory_service`.
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Copyright and licensing
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-----------------------
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Serval DNA is [free software][] produced by the [Serval Project][] and many
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[contributors][]. Its source code is licensed to the public under the [GNU
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General Public License version 2][GPL2]. Its technical documentation is
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licensed to the public under the [Creative Commons Attribution 4.0
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International licence][CC BY 4.0]. All source code and technical documentation
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is freely available from the Serval Project's [serval-dna][] Git repository on
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[GitHub][].
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The copyright in most of the source code in Serval DNA is held by [Serval
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Project Inc.][SPI], a not-for-profit association incorporated in the state of
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South Australia in the Commonwealth of Australia for the purpose of developing
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the Serval mesh software. The [COPYRIGHT][] file contains a full list of all
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those who hold copyright in portions of the Serval DNA source code.
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The [Serval Project][] will accept contributions for which copyright has been
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assigned to [Serval Project Inc.][SPI], or which are licensed to either [Serval
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Project Inc.][SPI] or to the public on terms that allow the Serval Project to
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freely redistribute and re-license the code under non-restrictive terms, for
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example, to release Serval DNA as part of a product distributed through the
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[Apple app store][].
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Individual developers may assign copyright in their contributions by signing
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the [Serval Project Developer Agreement - Individual][individ], and
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organisations by signing the [Serval Project Developer Agreement -
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Entity][entity].
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-----
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**Copyright 2015 Serval Project Inc.**
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**Copyright 2016-2017 Flinders University**
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This document is available under the [Creative Commons Attribution 4.0 International licence][CC BY 4.0].
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[Serval Project]: http://www.servalproject.org/
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[Serval Project Wiki]: http://developer.servalproject.org/
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[Serval DNA]: http://developer.servalproject.org/dokuwiki/doku.php?id=content:servaldna:
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[Serval DNA development]: http://developer.servalproject.org/dokuwiki/doku.php?id=content:servaldna:development
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[Serval Mesh]: http://developer.servalproject.org/dokuwiki/doku.php?id=content:servalmesh:
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[Serval Mesh Extender]: http://developer.servalproject.org/dokuwiki/doku.php?id=content:meshextender:
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[Serval mesh network]: http://developer.servalproject.org/dokuwiki/doku.php?id=content:tech:mesh_network
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[SPI]: http://developer.servalproject.org/dokuwiki/doku.php?id=content:spi
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[serval-dna]: https://github.com/servalproject/serval-dna
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[batphone]: https://github.com/servalproject/batphone
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[Serval DNA issues]: https://github.com/servalproject/serval-dna/issues
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[issue #28]: https://github.com/servalproject/serval-dna/issues/28
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[GNU C]: http://gcc.gnu.org/
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[Java]: https://en.wikipedia.org/wiki/Java_(programming_language)
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[Swift]: https://en.wikipedia.org/wiki/Swift_(programming_language)
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[daemon]: http://en.wikipedia.org/wiki/Daemon_(computing)
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[free software]: http://www.gnu.org/philosophy/free-sw.html
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[contributors]: /servalproject/serval-dna/blob/development/CONTRIBUTORS.md
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[GitHub]: https://github.com/servalproject
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[COPYRIGHT]: ./COPYRIGHT.txt
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[GPL2]: ./GPL-2.0.txt
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[Apple app store]: http://www.fsf.org/blogs/licensing/more-about-the-app-store-gpl-enforcement
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[individ]: http://developer.servalproject.org/files/serval_project_inc-individual.pdf
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[entity]: http://developer.servalproject.org/files/serval_project_inc-entity.pdf
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[DNA]: http://developer.servalproject.org/dokuwiki/doku.php?id=content:tech:dna
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[Serval Keyring]: ./doc/REST-API-Keyring.md
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[MDP]: ./doc/Mesh-Datagram-Protocol.md
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[VoMP]: http://developer.servalproject.org/dokuwiki/doku.php?id=content:tech:vomp
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[Rhizome]: ./doc/REST-API-Rhizome.md
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[MeshMS]: ./doc/REST-API-MeshMS.md
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[Serval Infrastructure]: ./doc/Serval-Infrastructure.md
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[JNI]: http://en.wikipedia.org/wiki/Java_Native_Interface
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[Bash]: http://en.wikipedia.org/wiki/Bash_(Unix_shell)
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[pipe]: http://www.kernel.org/doc/man-pages/online/pages/man2/pipe.2.html
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[CC BY 4.0]: ./LICENSE-DOCUMENTATION.md
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