readsb: new package

This package is based on dump1090-fa with many modifications. A big
advantage over dump1090-fa is that it can connect to multiple services
like adsbexchange, piaware or fr24feed.

As the idea for this package is mostly to feed other services, the HTML
files to serve via a webserver have not been included. The service(s)
that will be fed by readsb can offer such a webpage instead.

Finally, the init script does not use local variables, as local is
undefined in POSIX.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

utils/readsb/files/readsb.config

@@ -0,0 +1,46 @@
+config readsb main
+	option enabled '0'
+	option beast_crc_off '0'
+	option beast_df045_on '0'
+	option beast_df1117_on '0'
+	option beast_fec_off '0'
+	option beast_mlat_off '0'
+	option beast_modeac '0'
+	option beast_serial ''
+	option dcfilter '0'
+	option debug ''
+	option device ''
+	option device_type ''
+	option enable_agc '0'
+	option enable_biastee '0'
+	option fix '1'
+	option freq ''
+	option forward_mlat '0'
+	option gain ''
+	option gnss '0'
+	option json_location_accuracy ''
+	option lat ''
+	option lon ''
+	option max_range ''
+	option metric '0'
+	option mlat '0'
+	option modeac '0'
+	option net '1'
+	option net_beast_reduce_interval ''
+	option net_beast_reduce_out_port ''
+	option net_bi_port ''
+	option net_bind_address ''
+	option net_bo_port ''
+	option net_buffer ''
+	list net_connector ''
+	option net_only '0'
+	option net_verbatim '0'
+	option no_crc_check '0'
+	option no_modeac_auto '0'
+	option onlyaddr '0'
+	option ppm ''
+	option stats '0'
+	option stats_every ''
+	option stats_range '0'
+	option write_json ''
+	option write_json_every ''

utils/readsb/files/readsb.init

@@ -0,0 +1,105 @@
+#!/bin/sh /etc/rc.common
+
+START=90
+STOP=10
+USE_PROCD=1
+
+append_bool() {
+	config_get_bool tbool "$1" "$2"
+	v=$(echo "$2" | sed 's/_/-/g')
+	[ -z "$tbool" ] && tbool="$3"
+	[ "$tbool" -eq 1 ] && procd_append_param command "--${v}"
+}
+
+append_bool_no() {
+	config_get_bool tbool "$1" "$2"
+	v=$(echo "$2" | sed 's/_/-/g')
+	[ -z "$tbool" ] && tbool="$3"
+	[ "$tbool" -eq 0 ] && procd_append_param command "--no-${v}"
+	[ "$tbool" -eq 1 ] && procd_append_param command "--${v}"
+}
+
+append_param() {
+	config_get tparam "$1" "$2"
+	name=$(echo "$2" | sed 's/_/-/g')
+	[ -n "$tparam" ] && procd_append_param command "--${name}=${tparam}"
+}
+
+start_instance() {
+	cfg=$1
+
+	config_get_bool enabled "$cfg" "enabled" 0
+	[ "$enabled" -eq 1 ] || return 0
+
+	procd_open_instance "$cfg"
+	procd_set_param command /usr/bin/readsb
+	procd_append_param command "--quiet"
+
+	procd_set_param respawn
+	procd_set_param stderr "1"
+	procd_set_param stdout "1"
+
+	append_bool "$cfg" beast_crc_off 0
+	append_bool "$cfg" beast_df045_on 0
+	append_bool "$cfg" beast_df1117_on 0
+	append_bool "$cfg" beast_fec_off 0
+	append_bool "$cfg" beast_mlat_off 0
+	append_bool "$cfg" beast_modeac 0
+	append_bool "$cfg" dcfilter 0
+	append_bool "$cfg" enable_agc 0
+	append_bool "$cfg" enable_biastee 0
+	append_bool "$cfg" forward_mlat 0
+	append_bool "$cfg" gnss 0
+	append_bool "$cfg" metric 0
+	append_bool "$cfg" mlat 0
+	append_bool "$cfg" modeac 0
+	append_bool "$cfg" net 1
+	append_bool "$cfg" net_only 0
+	append_bool "$cfg" net_verbatim 0
+	append_bool "$cfg" no_crc_check 0
+	append_bool "$cfg" no_modeac_auto 0
+	append_bool "$cfg" onlyaddr 0
+	append_bool "$cfg" stats 0
+	append_bool "$cfg" stats_range 0
+
+	append_bool_no "$cfg" fix 1
+
+	for param in \
+		beast_serial \
+		debug \
+		device \
+		device_type \
+		freq \
+		gain \
+		json_location_accuracy \
+		lat \
+		lon \
+		max_range \
+		net_beast_reduce_interval \
+		net_beast_reduce_out_port \
+		net_bi_port \
+		net_bind_address \
+		net_bo_port \
+		net_buffer \
+		ppm \
+		stats_every \
+		write_json \
+		write_json_every
+	do
+		append_param "$cfg" "$param"
+	done
+
+	config_get net_connector "$cfg" "net_connector"
+	[ -z "$net_connector" ] || {
+		for conn in $net_connector; do
+			procd_append_param command --net-connector="$conn"
+		done
+	}
+
+	procd_close_instance
+}
+
+start_service() {
+	config_load readsb
+	config_foreach start_instance readsb
+}