The Serval Project's core daemon that implements Distributed Numbering Architecture (DNA), MDP, VoMP, Rhizome, MeshMS, etc.
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cli.h Add support for running and stopping servald from a JVM thread 2015-05-25 11:46:37 +09:30
commandline.c Add support for running and stopping servald from a JVM thread 2015-05-25 11:46:37 +09:30
commandline.h Generic trigger functions "trigger.h" 2015-06-02 02:23:06 +09:30
conf_cli.c Release mdp socket in config sync 2015-05-25 11:49:48 +09:30
conf_om.c Don't compare past the end of the parent key 2014-05-09 15:13:13 +09:30
conf_parse.c Refactor "conf_schema.h" to fix compile warnings 2014-08-14 16:40:30 +09:30
conf_schema.c Rearrange interface config to support unicast settings 2015-03-23 13:35:22 +10:30
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configure.in Measure free space on Android using statfs() 2014-06-26 12:17:36 +09:30
console.c Build the array of console commands by using linkage tricks 2014-08-22 10:36:52 +09:30
console.h Overhaul Makefile and header files 2014-05-26 15:36:26 +09:30
constants.h Add support for mdp clients to provide a link layer packet transport 2015-03-02 15:44:34 +10:30
context1.c Fix compiler warning 2013-11-21 16:49:44 +10:30
CONTRIBUTORS.md Add CONTRIBUTORS.md file, fix alternative links in README.md 2013-12-03 15:05:05 +10:30
COPYRIGHT.txt Add Petter Reinholdtsen to copyright message 2013-12-09 16:27:58 +10:30
crypto.c crypto_sign_compute_public_key() return void not int 2015-03-23 17:31:06 +10:30
crypto.h crypto_sign_compute_public_key() return void not int 2015-03-23 17:31:06 +10:30
dataformats.c Make strn_to_xxx() functions consistent 2015-03-28 04:53:09 +10:30
dataformats.h Initial msp library implementation with connection state tracking 2014-01-09 15:01:37 +10:30
directory_client.c Add support for running and stopping servald from a JVM thread 2015-05-25 11:46:37 +09:30
directory_service.c Fix un/signed comparison warning (error) 2014-09-11 16:10:49 +09:30
dna_helper.c Stop an existing dna helper on config reload 2014-10-02 10:49:20 +09:30
fakeradio.c Refactor source and build process to split out test commands 2014-12-01 13:26:27 +10:30
fdqueue.c Allow SIGIO to unblock poll() without dying 2015-06-01 16:46:21 +09:30
fdqueue.h Add support for running and stopping servald from a JVM thread 2015-05-25 11:46:37 +09:30
fifo.h Uniform copyright notices 2013-12-04 17:15:36 +10:30
golay.c Refactor to fix some OS-X compile warnings 2014-08-14 17:39:44 +09:30
golay.h Uniform #ifdef __SERVAL_DNA__... for headers 2013-12-04 17:15:36 +10:30
GPL-2.0.txt Add full text of GPL version 2.0 2013-12-04 02:52:31 +10:30
headerfiles.mk Generic trigger functions "trigger.h" 2015-06-02 02:23:06 +09:30
http_server.c Fix http server pause: could stop polling too early 2015-06-02 02:23:06 +09:30
http_server.h Replace RESTful newsince polling with triggers 2015-06-02 02:23:06 +09:30
httpd.c Replace RESTful newsince polling with triggers 2015-06-02 02:23:06 +09:30
httpd.h Replace RESTful newsince polling with triggers 2015-06-02 02:23:06 +09:30
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instance.c Overhaul Makefile and header files 2014-05-26 15:36:26 +09:30
instance.h Filesystem Heirarchy Standard (FHS) paths 2014-03-26 15:35:43 +10:30
jni.c Imported ref10/ implementation of crypto_sign from supercop-20120525 2012-10-18 17:26:48 +10:30
keyring_cli.c Fix test failure: create keyring 2015-02-23 13:24:05 +10:30
keyring_restful.c Add support for running and stopping servald from a JVM thread 2015-05-25 11:46:37 +09:30
keyring.c Fix test failure: create keyring 2015-02-23 13:24:05 +10:30
keyring.h Add support for running and stopping servald from a JVM thread 2015-05-25 11:46:37 +09:30
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log_stderr.c Move serverMode flag from log.c to server.c 2014-06-11 14:53:26 +09:30
log_util.c Refactor source and build process to split out test commands 2014-12-01 13:26:27 +10:30
log.c Refactor source and build process to split out test commands 2014-12-01 13:26:27 +10:30
log.h Move serverMode flag from log.c to server.c 2014-06-11 14:53:26 +09:30
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lsif.c initialise length field in netmask_addr 2014-10-31 15:18:22 +10:30
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macconfig Fixed broadcast address discovery to work on Mac. 2011-08-08 16:11:05 +09:30
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Makefile.dbg Move debug options to Makefile.dbg so we don't have to re-run configure. 2012-07-29 14:55:10 +09:30
Makefile.in Update test_cli to match recent config changes 2015-03-30 13:50:23 +10:30
mdp_client.c Trace network paths that are supposed to exist 2014-09-23 14:54:22 +09:30
mdp_client.h Add support for mdp clients to provide a link layer packet transport 2015-03-02 15:44:34 +10:30
mdp_filter.c Make strn_to_xxx() functions consistent 2015-03-28 04:53:09 +10:30
mdp_net.c Don't force the caller to initialise the address buffer length 2014-10-31 13:45:46 +10:30
mem.c Minor refactor in strn_edup() 2013-12-01 05:13:33 +10:30
mem.h Uniform #ifdef __SERVAL_DNA__... for headers 2013-12-04 17:15:36 +10:30
meshms_restful.c Replace RESTful newsince polling with triggers 2015-06-02 02:23:06 +09:30
meshms.c Change return type of rhizome_fill_manifest() 2015-03-16 22:40:08 +10:30
meshms.h Fix RESTful MeshMS newsince ACK logic 2014-11-12 23:09:00 +10:30
meshpotato_build Assorted unknown changes. Updated Makefile.in etc to properly build serval.c for building asterisk module. 2011-06-15 13:52:30 +09:30
monitor-cli.c Build the array of console commands by using linkage tricks 2014-08-22 10:36:52 +09:30
monitor-client.c Overhaul Makefile and header files 2014-05-26 15:36:26 +09:30
monitor-client.h Uniform #ifdef __SERVAL_DNA__... for headers 2013-12-04 17:15:36 +10:30
monitor.c Log the source of monitor errors 2014-10-03 11:16:41 +09:30
mpbuild Added mesh potato build script. 2011-08-10 15:39:40 +02:00
msp_client.c Fix off by one error in packet acknowledgment 2014-07-04 12:23:18 +09:30
msp_client.h Overhaul Makefile and header files 2014-05-26 15:36:26 +09:30
msp_proxy.c Build the array of console commands by using linkage tricks 2014-08-22 10:36:52 +09:30
net.c Overhaul Makefile and header files 2014-05-26 15:36:26 +09:30
net.h Overhaul Makefile and header files 2014-05-26 15:36:26 +09:30
network_cli.c Add explicit timeout parameter to mdp trace for slow links 2015-05-11 15:47:35 +09:30
os.c fix OSX build errors. 2014-10-01 15:52:14 +09:30
os.h Add timestamps to meshms messages and acks 2014-07-14 13:43:37 +09:30
overlay_address.c Add support for running and stopping servald from a JVM thread 2015-05-25 11:46:37 +09:30
overlay_address.h Add support for running and stopping servald from a JVM thread 2015-05-25 11:46:37 +09:30
overlay_buffer.c Remove unused debug flags 2014-05-26 14:01:34 +09:30
overlay_buffer.h Refactor rhizome mdp and vomp packet sending 2014-02-19 16:38:26 +10:30
overlay_interface.c Use configured reachable timeout for network links, read dummy files even when not ticking 2015-03-30 17:38:40 +10:30
overlay_interface.h Rearrange interface config to support unicast settings 2015-03-23 13:35:22 +10:30
overlay_link.c Use configured reachable timeout for network links, read dummy files even when not ticking 2015-03-30 17:38:40 +10:30
overlay_mdp_services.c Refactor keyring identity iteration 2014-10-31 15:19:59 +10:30
overlay_mdp.c Add support for running and stopping servald from a JVM thread 2015-05-25 11:46:37 +09:30
overlay_olsr.c Refactor interface addresses to use new socket_address struct 2014-01-09 15:01:38 +10:30
overlay_packet.h Re-route packets on retransmision if the route has changed 2015-03-30 11:27:37 +10:30
overlay_packetformats.c Rearrange interface config to support unicast settings 2015-03-23 13:35:22 +10:30
overlay_packetradio.c Rearrange interface config to support unicast settings 2015-03-23 13:35:22 +10:30
overlay_payload.c Allow for different routes per packet destination 2014-09-23 14:54:22 +09:30
overlay_queue.c Use configured reachable timeout for network links, read dummy files even when not ticking 2015-03-30 17:38:40 +10:30
performance_timing.c Add support for running and stopping servald from a JVM thread 2015-05-25 11:46:37 +09:30
radio_link.c Rearrange interface config to support unicast settings 2015-03-23 13:35:22 +10:30
radio_link.h Uniform #ifdef __SERVAL_DNA__... for headers 2013-12-04 17:15:36 +10:30
randombytes.c More consistent use of sleep_ms 2013-08-27 15:14:17 +09:30
README.md Add text of CC BY 4.0 license 2014-05-21 17:37:23 +09:30
rhizome_bundle.c Suppress Rhizome add de-duplication for journals 2015-04-13 16:24:05 +09:30
rhizome_cli.c Add 'rhizome add file --bundle=BID' option 2015-03-28 05:09:38 +10:30
rhizome_crypto.c crypto_sign_compute_public_key() return void not int 2015-03-23 17:31:06 +10:30
rhizome_database.c Generic trigger functions "trigger.h" 2015-06-02 02:23:06 +09:30
rhizome_direct_http.c Change return type of rhizome_fill_manifest() 2015-03-16 22:40:08 +10:30
rhizome_direct.c Build the array of console commands by using linkage tricks 2014-08-22 10:36:52 +09:30
rhizome_fetch.c Ensure sql lock failures are returned. 2014-09-12 15:24:23 +09:30
rhizome_http.c Ensure sql lock failures are returned. 2014-09-12 15:24:23 +09:30
rhizome_packetformats.c Improve debug info for rhizome sync 2014-06-28 20:27:29 +09:30
rhizome_restful.c Replace RESTful newsince polling with triggers 2015-06-02 02:23:06 +09:30
rhizome_store.c /restful/rhizome/append on existing journal 2015-03-30 18:24:12 +10:30
rhizome_sync.c Improve debug info for rhizome sync 2014-06-28 20:27:29 +09:30
rhizome_types.h Make strn_to_xxx() functions consistent 2015-03-28 04:53:09 +10:30
rhizome.c /restful/rhizome/append on existing journal 2015-03-30 18:24:12 +10:30
rhizome.h Generic trigger functions "trigger.h" 2015-06-02 02:23:06 +09:30
rotbuf.c Fix bug in rotbuf_next_chunk() when rotation == 0 2013-05-15 16:46:39 +09:30
rotbuf.h Remove spurious rotbuf_log() declaration, fixes 2014-04-03 10:43:14 +10:30
route_link.c Relax ack timing 2015-05-11 15:47:35 +09:30
section.h Generic trigger functions "trigger.h" 2015-06-02 02:23:06 +09:30
serval_packetvisualise.c Overhaul Makefile and header files 2014-05-26 15:36:26 +09:30
serval_types.h Make strn_to_xxx() functions consistent 2015-03-28 04:53:09 +10:30
serval.h Add support for running and stopping servald from a JVM thread 2015-05-25 11:46:37 +09:30
servalwrap.c Fix android commandline interface 2013-07-09 16:46:16 +09:30
server.c Move config to a thread local 2015-06-15 14:14:41 +09:30
server.h Add support for running and stopping servald from a JVM thread 2015-05-25 11:46:37 +09:30
sha2.c Add SHA512_Final_Len() et al 2014-11-13 09:59:21 +10:30
sha2.h Add SHA512_Final_Len() et al 2014-11-13 09:59:21 +10:30
sighandlers.c Overhaul Makefile and header files 2014-05-26 15:36:26 +09:30
sighandlers.h Overhaul Makefile and header files 2014-05-26 15:36:26 +09:30
simulator.c Fix conflict on UNUSED() macro from OpenJDK 7 2014-07-23 11:55:55 +09:30
simulator.h Create new AF_UNIX based network simulator 2014-05-23 10:47:22 +09:30
socket.c Overhaul Makefile and header files 2014-05-26 15:36:26 +09:30
socket.h Add support for mdp clients to provide a link layer packet transport 2015-03-02 15:44:34 +10:30
sourcefiles.mk Refactor source and build process to split out test commands 2014-12-01 13:26:27 +10:30
srandomdev.c Add supid copyright headers on request from Andrew Bettison in the serval project. 2013-12-07 18:38:14 +01:00
str.c Make strn_to_xxx() functions consistent 2015-03-28 04:53:09 +10:30
str.h Make strn_to_xxx() functions consistent 2015-03-28 04:53:09 +10:30
strbuf_helpers.c Rhizome Java API: improved form-data headers 2014-07-10 21:12:40 +09:30
strbuf_helpers.h Set up SEGV crash handler in main() not server() 2014-05-08 14:24:00 +09:30
strbuf.c Change return type of strbuf_sprintf() 2015-03-16 22:33:11 +10:30
strbuf.h Change return type of strbuf_sprintf() 2015-03-16 22:33:11 +10:30
strlcpy.c Fix issues arising from new strlcpy.c 2012-08-14 11:23:27 +09:30
strlcpy.h Fix build when strlcpy is present 2013-01-11 14:43:37 +10:30
test_cli.c Update test_cli to match recent config changes 2015-03-30 13:50:23 +10:30
testconfig.sh.in Trival test of dna JNI command line entry point 2012-04-23 18:25:26 +09:30
testdefs_java.sh Rhizome Java API: list bundles new since token 2014-07-12 22:49:00 +09:30
testdefs_json.sh Split up 'rhizomehttp' test script 2014-06-26 15:08:48 +09:30
testdefs_meshms.sh Fix 'meshms' and 'meshmsjava' newsince-arrival tests 2015-05-25 16:46:43 +09:30
testdefs_rhizome.sh Fix 'rhizomerestful' and 'rhizomejava' newsince-arrival tests 2015-06-02 02:23:06 +09:30
testdefs.sh Refactor: set $CR and $HT in testdefs.sh 2015-06-02 02:23:06 +09:30
testframework.sh Improve test framework: report stderr/stdout of execute within fork 2015-05-18 17:17:29 +09:30
testnacl.c Add missing copyright/license comment blocks 2013-11-21 16:05:18 +10:30
tfw_createfile.c Allow write to return less bytes than we asked for, or zero 2014-10-31 13:45:46 +10:30
timeit.c add context switching speed test to "test memory" command. 2013-10-22 13:12:10 -07:00
trigger.h Generic trigger functions "trigger.h" 2015-06-02 02:23:06 +09:30
uuid.c Rename uuid_t --> serval_uuid_t 2014-02-17 13:26:03 +10:30
uuid.h Rename uuid_t --> serval_uuid_t 2014-02-17 13:26:03 +10:30
version_servald.c Add "servald version" command and "make copyright" 2013-12-05 14:32:01 +10:30
version_string.sh Don't depend on .git folders or on error text strings 2014-12-12 11:01:34 +10:30
vomp_console.c Build the array of console commands by using linkage tricks 2014-08-22 10:36:52 +09:30
vomp.c Send ANSWERED message even if we never see RINGING 2014-10-01 15:53:19 +09:30
whence.c Overhaul Makefile and header files 2014-05-26 15:36:26 +09:30
whence.h Overhaul Makefile and header files 2014-05-26 15:36:26 +09:30
xprintf.c Add XPRINT strbuf adapter 2013-03-25 12:02:48 +10:30
xprintf.h Fix minor compilation issues on CentOS. 2014-10-20 12:35:21 +10:30

Serval DNA

Serval Project, March 2014

Serval DNA is the core component of the Serval Mesh app for Android and the Serval Mesh Extender long-range mesh networking device. It is a daemon process that performs all the central services of the Serval mesh network such as dynamic routing, encryption and authentication, file distribution, messaging, and voice telephony.

Any device with Wi-Fi connectivity that runs the Serval DNA daemon can participate in the Serval mesh network.

Download, build and test

INSTALL.md contains instructions for downloading, building and testing Serval DNA on most Linux and some Linux-like platforms.

Configuration

doc/Servald-Configuration.md describes how to set up and run a Serval DNA daemon.

Documentation

What is in this repository?

This repository contains the GNU C source code for the servald executable, a test framework and test scripts written in Bash, some technical documentation, and various support files for installation and configuration on various platforms.

The servald executable is a multi-purpose program that can be invoked directly from the command line, run as a daemon process, or invoked via JNI from within a Java program. The servald executable is really many commands built into one; the command-line arguments select which command to run. Some commands are stand-alone utilities, some start and stop the servald daemon process, some communicate with the servald daemon as an MDP client, and others via a two-way pipe called the monitor interface.

The following protocols and services are implemented in servald:

  • The Distributed Numbering Architecture (DNA) is the key innovation that makes mesh telephony viable in the absence of any infrastructure, eg, in the aftermath of a natural disaster or in remote locations. It is a protocol carried over MDP (see below) that allows any device to ask its neighboring devices for a phone number (DID). Such a request will propagate through the mesh, and any device may respond with the identity (SID) of a subscriber who has “claimed” that DID.

  • The Serval Keyring is a flat file containing all the user identities on a single device. Each identity is a set of elliptic curve secret cryptographic keys that belong to a single “mesh subscriber”, indexed by the subscriber's 256-bit public key, called a SID. Each identity in the keyring is locked by its own user-chosen password (called a PIN in the code and documentation), using elliptic curve cryptography to protect locked entries from theft or tampering, and steganography to allow the user to plausibly deny the existence of any locked identity.

  • The Mesh Datagram Protocol (MDP) is Serval's own layer 3 protocol designed for secure mesh networking. It is completely independent of Internet protocols such as IP and UDP, but for the time being is implemented as an “overlay” network based on UDP/IP because that is the interface that Linux and other operating systems provide for sending data over WiFi. However, MDP could easily be implemented directly over a layer 2 data link such as WiFi or Ethernet MAC. MDP uses subscribers' public keys (SID) as source and destination addresses, and has a 32-bit port number analogous to the 16-bit port number used in TCP/IP.

  • The Voice over Mesh Protocol (VoMP) is Serval's own call negotiation and two-way audio streaming protocol used to implement mesh voice calls. It is analogous to SIP/RTS, which is the dominant protocol used to implement Voice over Internet Protocol, but VoMP is designed for the variable and unstable conditions of wireless mesh networks. VoMP's session state model and signalling can handle packet loss, mid-call re-routing and re-connection where SIP would fail. VoMP's audio streaming can encapsulate many codecs and even DTMF (dialpad button) signalling.

  • The Rhizome content distribution service is a storage engine implemented using SQLite and a content-exchange protocol based on MDP and HTTP for the pervasive dissemination of content like images, videos, documents, software upgrades, etc. Each piece of content in Rhizome is called a “bundle”, which has two parts: a manifest that describes the content, and the payload, which is the content itself. Each bundle has its own unique cryptographic identifier that allows any recipient to verify that it has not been tampered with. A bundle's payload may be encrypted by the author so that only the designated recipient can read it.

  • The MeshMS messaging service sends short text messages using Rhizome as its transport. Each message thread is stored and carried in a pair of journal bundles, one for each direction (ply).

  • Serval Infrastructure services may optionally be deployed on any devices in the mesh to expose external services to mesh subscribers and vice versa (eg, VoIP gateways, SMS satellite links, packetised web), and to overcome scalability limitations of a perfectly decentralised mesh (eg, central telephone directory). Serval Infrastructure is implemented as a daemon with its own executable called directory_service.

Serval DNA is free software produced by the Serval Project and many contributors. Its source code is licensed to the public under the GNU General Public License version 2. Its technical documentation is licensed to the public under the Creative Commons Attribution 4.0 International licence. All source code and technical documentation is freely available from the Serval Project's serval-dna Git repository on GitHub.

The copyright in most of the source code in Serval DNA is held by Serval Project Inc., a not-for-profit association incorporated in the state of South Australia in the Commonwealth of Australia for the purpose of developing the Serval mesh software. The COPYRIGHT file contains a full list of all those who hold copyright in portions of the Serval DNA source code.

The Serval Project will accept contributions for which copyright has been assigned to Serval Project Inc., or which are licensed to either Serval Project Inc. or to the public on terms that allow the Serval Project to freely redistribute and re-license the code under non-restrictive terms, for example, to release Serval DNA as part of a product distributed through the Apple app store.

Individual developers may assign copyright in their contributions by signing the Serval Project Developer Agreement - Individual, and organisations by signing the Serval Project Developer Agreement - Entity.


Copyright 2014 Serval Project Inc.
CC-BY-4.0 This document is available under the Creative Commons Attribution 4.0 International licence.