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Initial HTTP support with planes animated using google map.

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This commit is contained in:
antirez 2013-01-13 01:39:29 +01:00
parent 4203b9caf6
commit a583615b66
3 changed files with 371 additions and 91 deletions
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16
README.md
View file

@ -16,7 +16,10 @@ The main features are:
* Interactive mode where aircrafts currently detected are shown
as a list refreshing as more data arrives.
* CPR coordinates decoding and track calculation from velocity.
* TCP server streaming and recceiving raw data to/from connected clients (using --net).
* TCP server streaming and recceiving raw data to/from connected clients
(using --net).
* Embedded HTTP server that displays the currently detected aircrafts on
Google Map.
Installation
---
@ -39,6 +42,11 @@ To run the program in interactive mode:
./dump1090 --interactive
To run the program in interactive mode, with networking support, and connect
with your browser to http://localhost:8080 to see live traffic:
./dump1090 --interactive --net
In iteractive mode it is possible to have a less information dense but more
"arcade style" output, where the screen is refreshed every second displaying
all the recently seen aircrafts with some additional information such as
@ -136,7 +144,11 @@ normal traffic from RTL devices or from file when --ifile is used.
It is possible to use Dump1090 just as an hub using --ifile with /dev/zero
as argument as in the following example:
./dump1090 --ifile /dev/zero --net --interactive
./dump1090 --net-only
Or alternatively to see what's happening on the screen:
./dump1090 --net-only --interactive
Then you can feed it from different data sources from the internet.

358
dump1090.c
View file

@ -40,6 +40,7 @@
#include <signal.h>
#include <fcntl.h>
#include <ctype.h>
#include <sys/stat.h>
#include "rtl-sdr.h"
#include "anet.h"
@ -81,7 +82,8 @@
#define MODES_NET_MAX_FD 1024
#define MODES_NET_OUTPUT_RAW_PORT 30002
#define MODES_NET_INPUT_RAW_PORT 30001
#define MODES_CLIENT_BUF_SIZE 256
#define MODES_NET_HTTP_PORT 8080
#define MODES_CLIENT_BUF_SIZE 1024
#define MODES_NOTUSED(V) ((void) V)
@ -142,6 +144,7 @@ struct {
int maxfd; /* Greatest fd currently active. */
int ros; /* Raw output listening socket. */
int ris; /* Raw input listening socket. */
int https; /* HTTP listening socket. */
/* Configuration */
char *filename; /* Input form file, --ifile option. */
@ -150,8 +153,10 @@ struct {
int raw; /* Raw output format. */
int debug; /* Debugging mode. */
int net; /* Enable networking. */
int net_only; /* Enable just networking. */
int net_output_raw_port; /* Raw output TCP port. */
int net_input_raw_port; /* Raw input TCP port. */
int net_http_port; /* HTTP port. */
int interactive; /* Interactive mode */
int interactive_rows; /* Interactive mode: max number of rows. */
int interactive_ttl; /* Interactive mode: TTL before deletion. */
@ -169,6 +174,7 @@ struct {
long long stat_goodcrc;
long long stat_badcrc;
long long stat_fixed;
long long stat_http_requests;
} Modes;
/* The struct we use to store information about a decoded message. */
@ -244,8 +250,10 @@ void modesInitConfig(void) {
Modes.check_crc = 1;
Modes.raw = 0;
Modes.net = 0;
Modes.net_only = 0;
Modes.net_output_raw_port = MODES_NET_OUTPUT_RAW_PORT;
Modes.net_input_raw_port = MODES_NET_INPUT_RAW_PORT;
Modes.net_http_port = MODES_NET_HTTP_PORT;
Modes.onlyaddr = 0;
Modes.debug = 0;
Modes.interactive = 0;
@ -292,6 +300,7 @@ void modesInit(void) {
Modes.stat_goodcrc = 0;
Modes.stat_badcrc = 0;
Modes.stat_fixed = 0;
Modes.stat_http_requests = 0;
Modes.exit = 0;
}
@ -1257,9 +1266,13 @@ void detectModeS(uint16_t *m, uint32_t mlen) {
* further processing and visualization. */
void useModesMessage(struct modesMessage *mm) {
if (!Modes.stats && (Modes.check_crc == 0 || mm->crcok)) {
if (Modes.interactive) {
/* Track aircrafts in interactive mode or if the HTTP
* interface is enabled. */
if (Modes.interactive || Modes.stat_http_requests > 0) {
interactiveReceiveData(mm);
} else {
}
/* In non-interactive way, display messages on standard output. */
if (!Modes.interactive) {
displayModesMessage(mm);
if (!Modes.raw && !Modes.onlyaddr) printf("\n");
}
@ -1596,27 +1609,31 @@ void snipMode(int level) {
/* Networking "stack" initialization. */
void modesInitNet(void) {
struct {
char *descr;
int *socket;
int port;
} services[3] = {
{"Raw TCP output", &Modes.ros, Modes.net_output_raw_port},
{"Raw TCP input", &Modes.ris, Modes.net_input_raw_port},
{"HTTP server", &Modes.https, Modes.net_http_port}
};
int j;
memset(Modes.clients,0,sizeof(Modes.clients));
Modes.maxfd = -1;
/* Raw output port */
Modes.ros = anetTcpServer(Modes.aneterr, Modes.net_output_raw_port, NULL);
if (Modes.ros == -1) {
fprintf(stderr, "Error opening raw TCP output port %d: %s\n",
Modes.net_output_raw_port, Modes.aneterr);
exit(1);
for (j = 0; j < 3; j++) {
int s = anetTcpServer(Modes.aneterr, services[j].port, NULL);
if (s == -1) {
fprintf(stderr, "Error opening the listening port %d (%s): %s\n",
services[j].port, services[j].descr, strerror(errno));
exit(1);
}
anetNonBlock(Modes.aneterr, s);
*services[j].socket = s;
}
/* Raw input port */
Modes.ris = anetTcpServer(Modes.aneterr, Modes.net_input_raw_port, NULL);
if (Modes.ris == -1) {
fprintf(stderr, "Error opening raw TCP input port %d: %s\n",
Modes.net_input_raw_port, Modes.aneterr);
exit(1);
}
anetNonBlock(Modes.aneterr, Modes.ros);
anetNonBlock(Modes.aneterr, Modes.ris);
signal(SIGPIPE, SIG_IGN);
}
@ -1627,10 +1644,11 @@ void modesAcceptClients(void) {
int fd, port;
unsigned int j;
struct client *c;
int services[2];
int services[3];
services[0] = Modes.ros;
services[1] = Modes.ris;
services[2] = Modes.https;
for (j = 0; j < sizeof(services)/sizeof(int); j++) {
fd = anetTcpAccept(Modes.aneterr, services[j], NULL, &port);
@ -1712,16 +1730,30 @@ int hexDigitVal(int c) {
/* This function decodes a string representing a Mode S message in
* raw hex format like: *8D4B969699155600E87406F5B69F;
* The string is supposed to be at the start of the client buffer
* and null-terminated.
*
* The message is passed to the higher level layers, so it feeds
* the selected screen output, the network output and so forth.
*
* If the message looks invalid is silently discarded. */
void decodeHexMessage(char *hex) {
void decodeHexMessage(struct client *c) {
char *hex = c->buf;
int l = strlen(hex), j;
unsigned char msg[MODES_LONG_MSG_BYTES];
struct modesMessage mm;
/* Remove spaces on the left and on the right. */
while(l && isspace(hex[l-1])) {
hex[l-1] = '\0';
l--;
}
while(isspace(*hex)) {
hex++;
l--;
}
/* Turn the message into binary. */
if (l < 2 || hex[0] != '*' || hex[l-1] != ';') return;
hex++; l-=2; /* Skip * and ; */
if (l > MODES_LONG_MSG_BYTES*2) return; /* Too long message... broken. */
@ -1736,65 +1768,190 @@ void decodeHexMessage(char *hex) {
useModesMessage(&mm);
}
/* This function polls all the clients using read() in order to receive new
/* Return a description of planes in json. */
char *aircraftsToJson(int *len) {
struct aircraft *a = Modes.aircrafts;
int buflen = 1024; /* The initial buffer is incremented as needed. */
char *buf = malloc(buflen), *p = buf;
int l;
l = snprintf(p,buflen,"[\n");
p += l; buflen -= l;
while(a) {
int altitude = a->altitude, speed = a->speed;
/* Convert units to metric if --metric was specified. */
if (Modes.metric) {
altitude /= 3.2828;
speed *= 1.852;
}
if (a->lat != 0 && a->lon != 0) {
l = snprintf(p,buflen,
"{\"hex\":\"%s\", \"lat\":%f, \"lon\":%f, \"track\":%d},\n",
a->hexaddr, a->lat, a->lon, a->track);
p += l; buflen -= l;
/* Resize if needed. */
if (buflen < 256) {
int used = p-buf;
buflen += 1024; /* Our increment. */
buf = realloc(buf,used+buflen);
p = buf+used;
}
}
a = a->next;
}
/* Remove the final comma if any, and closes the json array. */
if (*(p-2) == ',') {
*(p-2) = '\n';
p--;
buflen++;
}
l = snprintf(p,buflen,"]\n");
p += l; buflen -= l;
*len = p-buf;
return buf;
}
#define MODES_CONTENT_TYPE_HTML "text/html;charset=utf-8"
#define MODES_CONTENT_TYPE_JSON "application/json;charset=utf-8"
/* Get an HTTP request header and write the response to the client.
* Again here we assume that the socket buffer is enough without doing
* any kind of userspace buffering. */
void handleHTTPRequest(struct client *c) {
char hdr[512];
int clen, hdrlen;
int keepalive;
char *p, *url, *content;
char *ctype;
/* printf("HTTP request: %s\n", c->buf); */
/* Minimally parse the request. */
keepalive = strstr(c->buf, "keep-alive") != NULL;
p = strchr(c->buf,' ');
if (!p) return; /* There should be the method and a space... */
url = ++p; /* Now this should point to the requested URL. */
p = strchr(p, ' ');
if (!p) return; /* There should be a space before HTTP/... */
*p = '\0';
/* printf("URL: %s\n", url); */
/* Select the content to send, we have just two so far:
* "/" -> Our google map application.
* "/data.json" -> Our ajax request to update planes. */
if (strstr(url, "/data.json")) {
content = aircraftsToJson(&clen);
ctype = MODES_CONTENT_TYPE_JSON;
} else {
struct stat sbuf;
int fd = -1;
if (stat("gmap.html",&sbuf) != -1 &&
(fd = open("gmap.html",O_RDONLY)) != -1)
{
content = malloc(sbuf.st_size);
read(fd,content,sbuf.st_size);
} else {
char buf[128];
clen = snprintf(buf,sizeof(buf),"Error opening HTML file: %s",
strerror(errno));
content = strdup(buf);
}
if (fd != -1) close(fd);
ctype = MODES_CONTENT_TYPE_HTML;
}
/* Create the header and send the reply. */
hdrlen = snprintf(hdr, sizeof(hdr),
"HTTP/1.1 200 OK\r\n"
"Server: Dump1090\r\n"
"Content-Type: %s\r\n"
"Connection: %s\r\n"
"Content-Length: %d\r\n"
"\r\n",
ctype,
keepalive ? "keep-alive" : "close",
clen);
write(c->fd, hdr, hdrlen);
/* Send the actual content. */
write(c->fd, content, clen);
free(content);
Modes.stat_http_requests++;
}
/* This function polls the clients using read() in order to receive new
* messages from the net.
*
* Every full message received is decoded and passed to the higher layers. */
void modesReceiveRawInput(void) {
* The message is supposed to be separated by the next message by the
* separator 'sep', that is a null-terminated C string.
*
* Every full message received is decoded and passed to the higher layers
* calling the function 'handler'. */
void modesReadFromClient(struct client *c, char *sep,
void(*handler)(struct client *))
{
while(1) {
int left = sizeof(c->buf) - c->buflen;
int nread = read(c->fd, c->buf+c->buflen, left);
int fullmsg = 0;
int i;
char *p;
if (nread < 0) {
if (nread == 0 || errno != EAGAIN) {
/* Error, or end of file. */
modesFreeClient(c->fd);
}
break; /* Serve next client. */
}
c->buflen += nread;
/* If there is a complete message there must be the separator 'sep'
* in the buffer, note that we full-scan the buffer at every read
* for simplicity. */
if ((p = strstr(c->buf, sep)) != NULL) {
i = p - c->buf; /* Turn it as an index inside the buffer. */
c->buf[i] = '\0'; /* Te handler expects null terminated strings. */
handler(c); /* Call the function to process the message. */
/* Move what's left at the start of the buffer. */
i += strlen(sep); /* The separator is part of the previous msg. */
memmove(c->buf,c->buf+i,c->buflen-i);
c->buflen -= i;
/* Maybe there are more messages inside the buffer.
* Start looping from the start again. */
i = -1;
fullmsg = 1;
}
/* If our buffer is full discard it, this is some badly
* formatted shit. */
if (c->buflen == sizeof(c->buf)) {
c->buflen = 0;
/* If there is garbage, read more to discard it ASAP. */
continue;
}
/* If no message was decoded process the next client, otherwise
* read more data from the same client. */
if (!fullmsg) break;
}
}
/* Read data from clients. This function actually delegates a lower-level
* function that depends on the kind of service (raw, http, ...). */
void modesReadFromClients(void) {
int j;
struct client *c;
for (j = 0; j <= Modes.maxfd; j++) {
c = Modes.clients[j];
if (c && c->service == Modes.ris) {
while(1) {
int left = sizeof(c->buf) - c->buflen;
int nread = read(j, c->buf+c->buflen, left);
int decoded = 0;
int oldpos = c->buflen;
int i;
if (nread < 0) {
if (nread == 0 || errno != EAGAIN) {
/* Error, or end of file. */
modesFreeClient(j);
}
break; /* Serve next client. */
}
c->buflen += nread;
/* If there is a complete message there must be a newline
* in the buffer. The iteration starts from 'oldpos' as
* we need to check only the chars we read in this interaction
* as we are sure there is no newline in the pre-existing
* buffer. */
for (i = oldpos; i < c->buflen; i++) {
if (c->buf[i] == '\n') {
c->buf[i] = '\0';
if (i && c->buf[i-1] == '\r') c->buf[i-1] = '\0';
decodeHexMessage(c->buf);
/* Move what's left at the start of the buffer. */
i++;
memmove(c->buf,c->buf+i,c->buflen-i);
c->buflen -= i;
/* Maybe there are more messages inside the buffer.
* Start looping from the start again. */
i = -1;
decoded = 1;
}
}
/* If our buffer is full discard it, this is some badly
* formatted shit. */
if (c->buflen == sizeof(c->buf)) {
c->buflen = 0;
/* If there is garbage, read more to discard it ASAP. */
continue;
}
/* If no message was decoded process the next client, otherwise
* read more data from the same client. */
if (!decoded) break;
}
}
if ((c = Modes.clients[j]) == NULL) continue;
if (c->service == Modes.ris)
modesReadFromClient(c,"\n",decodeHexMessage);
else if (c->service == Modes.https)
modesReadFromClient(c,"\r\n\r\n",handleHTTPRequest);
}
}
@ -1812,8 +1969,10 @@ void showHelp(void) {
"--interactive-ttl <sec> Remove from list if idle for <sec> (default: 60).\n"
"--raw Show only messages hex values.\n"
"--net Enable networking.\n"
"--net-only Enable just networking, no RTL device or file used.\n"
"--net-ro-port <port> TCP listening port for raw output (default: 30002).\n"
"--net-ri-port <port> TCP listening port for raw input (default: 30001).\n"
"--net-http-port <port> HTTP server port (default: 8080).\n"
"--no-fix Disable single-bits error correction using CRC.\n"
"--no-crc-check Disable messages with broken CRC (discouraged).\n"
"--stats With --ifile print stats at exit. No other output.\n"
@ -1825,6 +1984,26 @@ void showHelp(void) {
);
}
/* This function is called a few times every second by main in order to
* perform tasks we need to do continuously, like accepting new clients
* from the net, refreshing the screen in interactive mode, and so forth. */
void backgroundTasks(void) {
if (Modes.net) {
modesAcceptClients();
modesReadFromClients();
}
/* Refresh screen when in interactive mode. */
if (Modes.interactive &&
(mstime() - Modes.interactive_last_update) >
MODES_INTERACTIVE_REFRESH_TIME)
{
interactiveRemoveStaleAircrafts();
interactiveShowData();
Modes.interactive_last_update = mstime();
}
}
int main(int argc, char **argv) {
int j;
@ -1853,10 +2032,15 @@ int main(int argc, char **argv) {
Modes.raw = 1;
} else if (!strcmp(argv[j],"--net")) {
Modes.net = 1;
} else if (!strcmp(argv[j],"--net-only")) {
Modes.net = 1;
Modes.net_only = 1;
} else if (!strcmp(argv[j],"--net-ro-port") && more) {
Modes.net_output_raw_port = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--net-ri-port") && more) {
Modes.net_input_raw_port = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--net-http-port") && more) {
Modes.net_http_port = atoi(argv[++j]);
} else if (!strcmp(argv[j],"--onlyaddr")) {
Modes.onlyaddr = 1;
} else if (!strcmp(argv[j],"--metric")) {
@ -1888,7 +2072,9 @@ int main(int argc, char **argv) {
/* Initialization */
modesInit();
if (Modes.filename == NULL) {
if (Modes.net_only) {
fprintf(stderr,"Net-only mode, no RTL device or file open.\n");
} else if (Modes.filename == NULL) {
modesInitRTLSDR();
} else {
if (Modes.filename[0] == '-' && Modes.filename[1] == '\0') {
@ -1900,6 +2086,13 @@ int main(int argc, char **argv) {
}
if (Modes.net) modesInitNet();
/* If the user specifies --net-only, just run in order to serve network
* clients without reading data from the RTL device. */
while (Modes.net_only) {
backgroundTasks();
usleep(100000);
}
/* Create the thread that will read the data from the device. */
pthread_create(&Modes.reader_thread, NULL, readerThreadEntryPoint, NULL);
@ -1922,20 +2115,7 @@ int main(int argc, char **argv) {
* slow processors). */
pthread_mutex_unlock(&Modes.data_mutex);
detectModeS(Modes.magnitude, Modes.data_len/2);
if (Modes.net) {
modesAcceptClients();
modesReceiveRawInput();
}
/* Refresh screen when in interactive mode. */
if (Modes.interactive &&
(mstime() - Modes.interactive_last_update) >
MODES_INTERACTIVE_REFRESH_TIME)
{
interactiveRemoveStaleAircrafts();
interactiveShowData();
Modes.interactive_last_update = mstime();
}
backgroundTasks();
pthread_mutex_lock(&Modes.data_mutex);
if (Modes.exit) break;
}

88
gmap.html Normal file
View file

@ -0,0 +1,88 @@
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0; padding: 0 }
#map_canvas { height: 100% }
</style>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js">
</script>
<script type="text/javascript"
src="https://maps.googleapis.com/maps/api/js?sensor=true">
</script>
<script type="text/javascript">
Map=null;
CenterLat=50.0;
CenterLon=9.0;
Planes={};
function getIconForPlane(plane) {
return {
strokeWeight: 2,
path: google.maps.SymbolPath.FORWARD_CLOSED_ARROW,
scale: 5,
fillColor: 'yellow',
fillOpacity: 0.8,
rotation: plane.track
};
}
function fetchData() {
$.getJSON('/data.json', function(data) {
var stillhere = {}
for (var j=0; j < data.length; j++) {
var plane = data[j];
stillhere[plane.hex] = true;
if (Planes[plane.hex]) {
var myplane = Planes[plane.hex];
var marker = myplane.marker;
var icon = marker.getIcon();
var newpos = new google.maps.LatLng(plane.lat, plane.lon);
marker.setPosition(newpos);
marker.setIcon(getIconForPlane(plane));
} else {
var marker = new google.maps.Marker({
position: new google.maps.LatLng(plane.lat, plane.lon),
map: Map,
title: plane.hex,
icon: getIconForPlane(plane)
});
plane.marker = marker;
Planes[plane.hex] = plane;
}
}
/* Remove idle planes. */
for (var p in Planes) {
if (!stillhere[p]) {
Planes[p].marker.setMap(null);
delete Planes[p];
}
}
});
}
function initialize() {
var mapOptions = {
center: new google.maps.LatLng(CenterLat, CenterLon),
zoom: 8,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
Map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);
/* Setup our timer to poll from the server. */
window.setInterval(function() {
fetchData();
}, 1000);
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="width:100%; height:100%"></div>
</body>
</html>