Dump 1090 is a Mode S decoder specifically designed for RTLSDR devices.

The main features are:

* Robust decoding of weak messages.
* Network support: TCP30003 stream (MSG5...), Raw packets, HTTP.
* Embedded HTTP server that displays the currently detected aircrafts on
  Google Map.
* Single bit errors correction using the 24 bit CRC.
* Ability to decode DF11, DF17 messages.
* Ability to decode DF formats like DF0, DF4, DF5, DF16, DF20 and DF21 where the
  checksum is xored with the ICAO address by brute forcing the checksum field
  using recently seen ICAO addresses.
* Decode raw IQ samples from file (using --ifile command line switch).
* Interactive command-line-interfae 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 receiving raw data to/from connected clients.

WWW: https://github.com/antirez/dump1090

comms/Makefile

@@ -32,6 +32,7 @@
     SUBDIR += deforaos-phone
     SUBDIR += dfu-programmer
     SUBDIR += dfu-util
+    SUBDIR += dump1090
     SUBDIR += ebook2cw
     SUBDIR += ebook2cwgui
     SUBDIR += echolinux

comms/dump1090/Makefile

@@ -0,0 +1,36 @@
+# Created by: Steven Kreuzer <skreuzer@FreeBSD.org>
+# $FreeBSD$
+
+PORTNAME=	dump1090
+PORTVERSION=	20150225
+CATEGORIES=	comms
+
+MAINTAINER=	skreuzer@FreeBSD.org
+COMMENT=	Simple Mode S decoder for RTLSDR devices
+
+USE_GITHUB=	yes
+GH_ACCOUNT=	antirez
+GH_COMMIT=	4c53e25
+GH_TAGNAME=	4c53e251439f42135fc80fe000174f7accdb048c
+
+LICENSE=	BSD3CLAUSE
+
+LIB_DEPENDS=	librtlsdr.so:${PORTSDIR}/comms/rtl-sdr
+
+USES=	gmake
+
+CFLAGS+=	-I${LOCALBASE}/include
+LDFLAGS+=	-L${LOCALBASE}/lib -lrtlsdr -lusb -lpthread -lm
+
+PLIST_FILES=	bin/dump1090 \
+		${DATADIR}/gmap.html
+
+post-patch:
+	@${REINPLACE_CMD} -e "s|gmap.html|${DATADIR}/gmap.html|" ${WRKSRC}/dump1090.c
+
+do-install:
+	${INSTALL_PROGRAM} ${WRKSRC}/${PORTNAME} ${STAGEDIR}${PREFIX}/bin
+	${MKDIR} ${STAGEDIR}${DATADIR}
+	${INSTALL_DATA} ${WRKSRC}/gmap.html ${STAGEDIR}${DATADIR}
+
+.include <bsd.port.mk>

comms/dump1090/distinfo

@@ -0,0 +1,2 @@
+SHA256 (dump1090-20150225.tar.gz) = a9d7b9eaf439815f22f62e770a315114afdbb1301ca70cb59de11e06dbdd6e07
+SIZE (dump1090-20150225.tar.gz) = 484418

comms/dump1090/files/patch-Makefile

@@ -0,0 +1,21 @@
+--- Makefile.orig	2015-03-03 21:04:48 UTC
++++ Makefile
+@@ -1,6 +1,6 @@
+-CFLAGS=-O2 -g -Wall -W `pkg-config --cflags librtlsdr`
+-LIBS=`pkg-config --libs librtlsdr` -lpthread -lm
+-CC=gcc
++CFLAGS?=-O2 -g -Wall -W `pkg-config --cflags librtlsdr`
++LDFLAGS?=`pkg-config --libs librtlsdr` -lpthread -lm
++CC?=gcc
+ PROGNAME=dump1090
+ 
+ all: dump1090
+@@ -9,7 +9,7 @@ all: dump1090
+ 	$(CC) $(CFLAGS) -c $<
+ 
+ dump1090: dump1090.o anet.o
+-	$(CC) -g -o dump1090 dump1090.o anet.o $(LIBS)
++	$(CC) -g -o dump1090 dump1090.o anet.o $(LDFLAGS)
+ 
+ clean:
+ 	rm -f *.o dump1090

comms/dump1090/pkg-descr

@@ -0,0 +1,20 @@
+Dump 1090 is a Mode S decoder specifically designed for RTLSDR devices.
+
+The main features are:
+
+* Robust decoding of weak messages.
+* Network support: TCP30003 stream (MSG5...), Raw packets, HTTP.
+* Embedded HTTP server that displays the currently detected aircrafts on
+  Google Map.
+* Single bit errors correction using the 24 bit CRC.
+* Ability to decode DF11, DF17 messages.
+* Ability to decode DF formats like DF0, DF4, DF5, DF16, DF20 and DF21 where the
+  checksum is xored with the ICAO address by brute forcing the checksum field
+  using recently seen ICAO addresses.
+* Decode raw IQ samples from file (using --ifile command line switch).
+* Interactive command-line-interfae 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 receiving raw data to/from connected clients.
+
+WWW: https://github.com/antirez/dump1090