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>

diff --git a/utils/readsb/Makefile b/utils/readsb/Makefile
new file mode 100644 (file)
index 0000000..535580c
--- /dev/null
+++ b/utils/readsb/Makefile
@@ -0,0 +1,73 @@
+# Copyright (C) 2020 Stijn Tintel <stijn@linux-ipv6.be>
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=readsb
+PKG_VERSION:=3.8.3
+PKG_RELEASE:=1
+
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
+PKG_SOURCE_URL:=https://codeload.github.com/Mictronics/readsb/tar.gz/v$(PKG_VERSION)?
+PKG_HASH:=bf59b8ecd0ff66945b210c55a5b824aa63ff8cbb1704249528d30a4902e716b2
+
+PKG_LICENSE:=GPL-3.0-or-later
+PKG_LICENSE_FILES:=COPYING LICENSE
+
+PKG_MAINTAINER:=Stijn Tintel <stijn@linux-ipv6.be>
+
+PKG_BUILD_DEPENDS:=!USE_GLIBC:argp-standalone
+PKG_BUILD_PARALLEL:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/readsb/default
+  SECTION:=utils
+  CATEGORY:=Utilities
+  DEPENDS:=+libncurses
+  TITLE:=Mode-S/ADSB/TIS decoder for various devices
+  URL:=https://github.com/Mictronic/readsb
+endef
+
+define Package/readsb
+  $(call Package/readsb/default)
+  TITLE+= (readsb)
+  DEPENDS+=+librtlsdr
+endef
+
+define Package/viewadsb
+  $(call Package/readsb/default)
+  TITLE+= (viewadsb)
+endef
+
+MAKE_FLAGS += \
+       BLADERF=no \
+       CFLAGS="$(TARGET_CFLAGS)" \
+       RTLSDR=yes \
+       UNAME="Linux"
+
+TARGET_CFLAGS += -ffunction-sections -fdata-sections -flto
+TARGET_LDFLAGS += \
+       $(if $(CONFIG_LIBC_USE_GLIBC),,-largp) \
+       -Wl,--gc-sections,--as-needed
+
+define Package/readsb/conffiles
+/etc/config/readsb
+endef
+
+define Package/readsb/install
+       $(INSTALL_DIR) $(1)/etc/{config,init.d} $(1)/usr/bin
+       $(INSTALL_CONF) ./files/readsb.config $(1)/etc/config/readsb
+       $(INSTALL_BIN) ./files/readsb.init $(1)/etc/init.d/readsb
+       $(INSTALL_BIN) $(PKG_BUILD_DIR)/readsb $(1)/usr/bin
+endef
+
+define Package/viewadsb/install
+       $(INSTALL_DIR) $(1)/usr/bin
+       $(INSTALL_BIN) $(PKG_BUILD_DIR)/viewadsb $(1)/usr/bin
+endef
+
+$(eval $(call BuildPackage,readsb))
+$(eval $(call BuildPackage,viewadsb))

diff --git a/utils/readsb/files/readsb.config b/utils/readsb/files/readsb.config
new file mode 100644 (file)
index 0000000..1799c95
--- /dev/null
+++ b/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 ''

diff --git a/utils/readsb/files/readsb.init b/utils/readsb/files/readsb.init
new file mode 100644 (file)
index 0000000..7577609
--- /dev/null
+++ b/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
+}

diff --git a/utils/readsb/patches/001-network-avoid-segfault-in-freeaddrinfo.patch b/utils/readsb/patches/001-network-avoid-segfault-in-freeaddrinfo.patch
new file mode 100644 (file)
index 0000000..485cb30
--- /dev/null
+++ b/utils/readsb/patches/001-network-avoid-segfault-in-freeaddrinfo.patch
@@ -0,0 +1,89 @@
+From 82014a5fa9930b0875e57869265acf011772277c Mon Sep 17 00:00:00 2001
+From: Stijn Tintel <stijn@linux-ipv6.be>
+Date: Sun, 3 May 2020 20:56:58 +0300
+Subject: [PATCH] network: avoid segfault in freeaddrinfo
+
+Calling freeaddrinfo(NULL) when using musl libc causes a segfault.
+
+Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
+---
+ anet.c     | 15 ++++++++++++---
+ net_io.c   |  5 ++++-
+ viewadsb.c |  5 ++++-
+ 3 files changed, 20 insertions(+), 5 deletions(-)
+
+diff --git a/anet.c b/anet.c
+index 5c35ff8..7f01958 100644
+--- a/anet.c
++++ b/anet.c
+@@ -212,7 +212,10 @@ static int anetTcpGenericConnect(char *err, char *addr, char *service, int flags
+             if (ss) {
+                 memcpy(ss, p->ai_addr, sizeof(*ss));
+             }
+-            freeaddrinfo(gai_result);
++            if (gai_result) {
++                freeaddrinfo(gai_result);
++                gai_result = NULL;
++            }
+             return s;
+         }
+ 
+@@ -220,7 +223,10 @@ static int anetTcpGenericConnect(char *err, char *addr, char *service, int flags
+         anetCloseSocket(s);
+     }
+ 
+-    freeaddrinfo(gai_result);
++    if (gai_result) {
++        freeaddrinfo(gai_result);
++        gai_result = NULL;
++    }
+     return ANET_ERR;
+ }
+ 
+@@ -368,7 +374,10 @@ int anetTcpServer(char *err, char *service, char *bindaddr, int *fds, int nfds)
+         fds[i++] = s;
+     }
+ 
+-    freeaddrinfo(gai_result);
++    if (gai_result) {
++        freeaddrinfo(gai_result);
++        gai_result = NULL;
++    }
+     return (i > 0 ? i : ANET_ERR);
+ }
+ 
+diff --git a/net_io.c b/net_io.c
+index 1f4d848..5f59194 100644
+--- a/net_io.c
++++ b/net_io.c
+@@ -3285,7 +3285,10 @@ void cleanupNetwork(void) {
+     for (int i = 0; i < Modes.net_connectors_count; i++) {
+         struct net_connector *con = Modes.net_connectors[i];
+         free(con->address);
+-        freeaddrinfo(con->addr_info);
++        if (con->addr_info) {
++            freeaddrinfo(con->addr_info);
++            con->addr_info = NULL;
++        }
+         if (con->mutex) {
+             pthread_mutex_unlock(con->mutex);
+             pthread_mutex_destroy(con->mutex);
+diff --git a/viewadsb.c b/viewadsb.c
+index 5fc5386..ad7b1bd 100644
+--- a/viewadsb.c
++++ b/viewadsb.c
+@@ -308,7 +308,10 @@ int main(int argc, char **argv) {
+     }
+     // Free local service and client
+     if (s) free(s);
+-    freeaddrinfo(con->addr_info);
++    if (con->addr_info) {
++        freeaddrinfo(con->addr_info);
++        con->addr_info = NULL;
++    }
+     pthread_mutex_unlock(con->mutex);
+     pthread_mutex_destroy(con->mutex);
+     free(con->mutex);
+-- 
+2.26.2
+