[source] dnsmasq: add listen_address parameter

[LEDE Commits]

dedeckeh pushed a commit to source.git, branch master:
https://git.lede-project.org/7ffb707576e8c635321275e9f118c8ad27d4c798

commit 7ffb707576e8c635321275e9f118c8ad27d4c798
Author: Christian Lamparter <chunkeey at gmail.com>
AuthorDate: Thu Oct 12 23:16:06 2017 +0200

    dnsmasq: add listen_address parameter
    
    This patch adds a parser for the uci representation of
    dnsmasq's "-a | --listen-address" option.
    
    In summary, this option forces dnsmasq to listen on the
    given IP address(es). Both interface and listen-address
    options may be given, in which case the set of both
    interfaces and addresses is used.
    
    Note that if no interface option is given, but listen_address is,
    dnsmasq will not automatically listen on the loopback interface.
    To achieve this, the loopback IP addresses, 127.0.0.1 and/or ::1
    must be explicitly added.
    
    This option is useful for ujailed dnsmasq instances, that would
    otherwise fail to work properly, because listening to the
    "This host on this network" address (aka 0.0.0.0 see rfc1700 page 4)
    may not be allowed.
    
    Signed-off-by: Christian Lamparter <chunkeey at gmail.com>
    Signed-off-by: Hans Dedecker <dedeckeh at gmail.com> (PKG_RELEASE increase)
---
 package/network/services/dnsmasq/Makefile           | 2 +-
 package/network/services/dnsmasq/files/dnsmasq.init | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/package/network/services/dnsmasq/Makefile b/package/network/services/dnsmasq/Makefile
index 9a024ce..7646fbd 100644
--- a/package/network/services/dnsmasq/Makefile
+++ b/package/network/services/dnsmasq/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=dnsmasq
 PKG_VERSION:=2.78
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=http://thekelleys.org.uk/dnsmasq/
diff --git a/package/network/services/dnsmasq/files/dnsmasq.init b/package/network/services/dnsmasq/files/dnsmasq.init
index 0149643..3d3d833 100644
--- a/package/network/services/dnsmasq/files/dnsmasq.init
+++ b/package/network/services/dnsmasq/files/dnsmasq.init
@@ -142,6 +142,10 @@ append_interface() {
 	xappend "--interface=$ifname"
 }
 
+append_listenaddress() {
+	xappend "--listen-address=$1"
+}
+
 append_notinterface() {
 	network_get_device ifname "$1" || ifname="$1"
 	xappend "--except-interface=$ifname"
@@ -835,6 +839,7 @@ dnsmasq_start()
 	append_parm "$cfg" "maxport" "--max-port"
 	append_parm "$cfg" "domain" "--domain"
 	append_parm "$cfg" "local" "--server"
+	config_list_foreach "$cfg" "listen_address" append_listenaddress
 	config_list_foreach "$cfg" "server" append_server
 	config_list_foreach "$cfg" "rev_server" append_rev_server
 	config_list_foreach "$cfg" "address" append_address