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| 2 | ntripserver
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| 3 | ----------------------------------------------------------------------
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| 4 |
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| 5 | (c) German Federal Agency for Cartography and Geodesy (BKG), 2002-2007
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| 6 |
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| 7 |
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| 8 | Files in ntripserver.tgz
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| 9 | ------------------------
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| 10 | - ntripserver.tar: ntripserver program tar archive
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| 11 | - makefile: preconfigured makefile for convenient installation
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| 12 | - ntripserver.c: c source file
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| 13 | - README: Readme file for the ntripserver program
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| 14 | - startntripserver.sh: shell script to start the ntripserver program
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| 15 |
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| 16 |
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| 17 | NTRIP
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| 18 | -----
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| 19 | The ntripserver is a HTTP client based on "Networked Transport of
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| 20 | RTCM via Internet Protocol" (NTRIP). This is an application-level
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| 21 | protocol streaming Global Navigation Satellite System (GNSS) data
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| 22 | over the Internet.
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| 23 | NTRIP Version 1.0 is a generic, stateless protocol based on the
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| 24 | Hypertext Transfer Protocol HTTP/1.1. The HTTP objects are
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| 25 | enhanced to GNSS data streams.
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| 26 |
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| 27 | The primary motivation for NTRIP Version 2.0 is to develop a fully
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| 28 | HTTP-compatible Internet protocol standard that would work with proxy
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| 29 | servers and to add an optional data transport via UDP. Hence, one
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| 30 | NTRIP Version 2.0 transport approach is still based on HTTP1.1 on top
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| 31 | of TCP. The second NTRIP Version 2.0 transport approach is based on
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| 32 | both, the Internet Standard Protocol RTSP (Real Time Streaming Protocol)
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| 33 | for stream control on top of TCP and the Internet Standard Protocol RTP
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| 34 | (Real Time Transport Protocol) for data transport on top of
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| 35 | connectionless UDP.
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| 36 |
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| 37 | NTRIP is designed for disseminating differential correction data
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| 38 | (e.g in the RTCM-104 format) or other kinds of GNSS streaming data to
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| 39 | stationary or mobile users over the Internet, allowing simultaneous
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| 40 | PC, Laptop, PDA, or receiver connections to a broadcasting host. NTRIP
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| 41 | supports wireless Internet access through Mobile IP Networks like GSM,
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| 42 | GPRS, EDGE, or UMTS.
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| 43 |
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| 44 | NTRIP is implemented in three system software components:
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| 45 | NTRIP clients, NTRIP servers and NTRIP casters. The NTRIP caster is the
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| 46 | actual HTTP server program whereas NTRIP client and NTRIP server are
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| 47 | acting as HTTP clients.
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| 48 |
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| 49 |
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| 50 | ntripserver
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| 51 | -----------
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| 52 | The program ntripserver is designed to provide real-time data
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| 53 | from a single NTRIP source running under a POSIX operating system.
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| 54 |
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| 55 | Basically the ntripserver grabs a GNSS byte stream (Input, Source)
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| 56 | from either
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| 57 |
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| 58 | 1. a Serial port, or
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| 59 | 2. an IP server, or
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| 60 | 3. a File, or
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| 61 | 4. a SISNeT Data Server, or
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| 62 | 5. a UDP server, or
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| 63 | 6. an NTRIP Version 1.0 Caster
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| 64 |
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| 65 | and forwards that incoming stream to either
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| 66 |
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| 67 | 1. an NTRIP Version 2.0 Caster via TCP/IP (Output, Destination), or
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| 68 | 2. an NTRIP Version 2.0 Caster via RTSP/RTP (Output, Destination), or
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| 69 | 3. an NTRIP Version 1.0 Caster.
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| 70 |
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| 71 | Please note, the options to support NTRIP Version 2.0 are currently still
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| 72 | under development and should be used with care. Keep in mind that details
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| 73 | of the NTRIP Version 2.0 transport protocol are still under discussion
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| 74 | and may be changed.
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| 75 |
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| 76 |
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| 77 | Installation
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| 78 | ------------
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| 79 | To install the program run
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| 80 |
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| 81 | - gunzip ntripserver.tgz
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| 82 | - tar -xf ntripserver.tar
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| 83 | - make, or
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| 84 | - make debug (for debugging purposes).
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| 85 |
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| 86 | To compile the source code on a Windows system where a mingw gcc
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| 87 | compiler is available, you may like to run the following command:
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| 88 |
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| 89 | - gcc -Wall -W -O3 -DWINDOWSVERSION ntripserver.c -DNDEBUG
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| 90 | -o ntripserver -lwsock32, or
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| 91 | - mingw32-make, or
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| 92 | - mingw32-make debug
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| 93 |
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| 94 | The exacutable will show up as ntripserver on Linux
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| 95 | or ntripserver.exe on a Windows system.
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| 96 |
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| 97 | Usage
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| 98 | -----
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| 99 | The user may call the program with the following options:
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| 100 |
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| 101 | -h|? print this help screen
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| 102 |
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| 103 | -E <ProxyHost> Proxy server host name or address, required i.e. when
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| 104 | running the program in a proxy server protected LAN,
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| 105 | optional
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| 106 | -F <ProxyPort> Proxy server IP port, required i.e. when running
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| 107 | the program in a proxy server protected LAN, optional
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| 108 | -R <maxDelay> Reconnect mechanism with maximum delay between reconnect
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| 109 | attemts in seconds, default: no reconnect activated,
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| 110 | optional
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| 111 |
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| 112 | -M <InputMode> Sets the input mode (1 = Serial Port, 2 = IP server,
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| 113 | 3 = File, 4 = SISNeT Data Server, 5 = UDP server, 6 = NTRIP Caster),
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| 114 | mandatory
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| 115 |
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| 116 | <InputMode> = 1 (Serial Port):
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| 117 | -i <Device> Serial input device, default: /dev/gps, mandatory if
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| 118 | <InputMode>=1
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| 119 | -b <BaudRate> Serial input baud rate, default: 19200 bps, mandatory
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| 120 | if <InputMode>=1
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| 121 |
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| 122 | <InputMode> = 2|5 (IP port | UDP port):
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| 123 | -H <ServerHost> Input host name or address, default: 127.0.0.1,
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| 124 | mandatory if <InputMode> = 2|5
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| 125 | -P <ServerPort> Input port, default: 1025, mandatory if <InputMode>= 2|5
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| 126 | -f <ServerFile> Name of initialization file to be send to server,
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| 127 | optional
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| 128 | -x <ServerUser> User ID to access incoming stream, optional
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| 129 | -y <ServerPass> Password, to access incoming stream, optional
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| 130 | -B Bind to incoming UDP stream, optional for <InputMode> = 5
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| 131 |
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| 132 | <InputMode> = 3 (File):
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| 133 | -s <File> File name to simulate stream by reading data from (log)
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| 134 | file, default is /dev/stdin, mandatory for <InputMode> = 3
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| 135 |
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| 136 | <InputMode> = 4 (SISNeT Data Server):
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| 137 | -H <SisnetHost> SISNeT Data Server name or address,
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| 138 | default: 131.176.49.142, mandatory if <InputMode> = 4
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| 139 | -P <SisnetPort> SISNeT Data Server port, default: 7777, mandatory if
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| 140 | <InputMode> = 4
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| 141 | -u <SisnetUser> SISNeT Data Server user ID, mandatory if <InputMode> = 4
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| 142 | -l <SisnetPass> SISNeT Data Server password, mandatory if <InputMode> = 4
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| 143 | -V <SisnetVers> SISNeT Data Server Version number, options are 2.1, 3.0
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| 144 | or 3.1, default: 3.1, mandatory if <InputMode> = 4
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| 145 |
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| 146 | <InputMode> = 6 (NTRIP Version 1.0 Caster):
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| 147 | -H <SourceHost> Source caster name or address, default: 127.0.0.1,
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| 148 | mandatory if <InputMode> = 6
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| 149 | -P <SourcePort> Source caster port, default: 2101, mandatory if
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| 150 | <InputMode> = 6
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| 151 | -D <SourceMount> Source caster mountpoint for stream input, mandatory if
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| 152 | <InputMode> = 6
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| 153 | -U <SourceUser> Source caster user Id for input stream access, mandatory
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| 154 | for protected streams if <InputMode> = 6
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| 155 | -W <SourcePass> Source caster password for input stream access, mandatory
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| 156 | for protected streams if <InputMode> = 6
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| 157 |
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| 158 | -O <OutputMode> Sets output mode for communication with destination caster, optional
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| 159 | 1 = http: NTRIP Version 2.0 Caster in TCP/IP mode
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| 160 | 2 = rtsp: NTRIP Version 2.0 Caster in RTSP/RTP mode
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| 161 | 3 = ntrip1: NTRIP Version 1.0 Caster
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| 162 |
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| 163 | Defaults to NTRIP Version 1.0, but will change to 2.0 in future versions
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| 164 | Note that the program automatically falls back from mode rtsp to mode http and
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| 165 | further to mode ntrip1 if necessary.
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| 166 |
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| 167 | -a <DestHost> Destination caster name or address, default: 127.0.0.1,
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| 168 | mandatory
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| 169 | -p <DestPort> Destination caster port, default: 2101, mandatory
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| 170 | -m <DestMount> Destination caster mountpoint for stream upload,
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| 171 | mandatory
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| 172 | -n <DestUser> Destination caster user ID for stream upload to
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| 173 | mountpoint, only for NTRIP Version 2.0 destination
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| 174 | casters, mandatory
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| 175 | -c <DestPass> Destination caster password for stream upload to
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| 176 | mountpoint, mandatory
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| 177 | -N <STR-record> Sourcetable STR-record
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| 178 | optional for NTRIP Version 2.0 in RTSP/RTP and TCP/IP mode
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| 179 |
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| 180 |
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| 181 | Example1: Reading from serial port and forward to NTRIP Version 1.0 Caster:
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| 182 |
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| 183 | ./ntripserver -M 1 -i /dev/ttys0 -b 9600 -O 2 -a www.euref-ip.net -p 2101 -m Mount2
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| 184 | -n serverID -c serverPass
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| 185 |
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| 186 | Example2: Reading from NTRIP Version 1.0 Caster and forward to NTRIP Version 2.0
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| 187 |
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| 188 | ./ntripserver -M 6 -H www.euref-ip.net -P 2101 -D Mount1 -U clientID -W clientPass
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| 189 | -O 1 -a www.goenet-ip.fi -p 2101 -m Mount2 -n serverID -c serverPass
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| 190 |
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| 191 |
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| 192 | NTRIP Caster password and mountpoint
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| 193 | ------------------------------------
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| 194 | Feeding data streams into the NTRIP system using the ntripserver
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| 195 | program needs a password (and a user ID for NTRIP Version 2.0)
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| 196 | and one mountpoint per stream.
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| 197 | For the NTRIP Broadcasters EUREF-IP or IGS-IP this is currently
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| 198 | available from http://igs.bkg.bund.de/index_ntrip_prov.htm
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| 199 |
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| 200 |
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| 201 | Disclaimer
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| 202 | ----------
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| 203 | Note that this example server implementation is currently an
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| 204 | experimental software. The BKG disclaims any liability nor
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| 205 | responsibility to any person or entity with respect to any loss or
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| 206 | damage caused, or alleged to be caused, directly or indirectly by the
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| 207 | use and application of the NTRIP technology.
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| 208 |
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| 209 |
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| 210 | Further information
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| 211 | -------------------
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| 212 | URL: http://igs.bkg.bund.de/index_ntrip.htm
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| 213 | E-mail: euref-ip@bkg.bund.de
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