dnsmasq: Don't expose *.bind data incl version

Don't expose dnsmasq version & other data to clients via the *.bind
pseudo domain.  This uses a new 'NO_ID' compile time option which has been
discussed and submitted upstream.

This is an alternate to replacing version with 'unknown' which affects
the version reported to syslog and 'dnsmasq --version'

Run time tested with & without NO_ID on Archer C7 v2

Signed-off-by: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>

diff --git a/package/network/services/dnsmasq/Makefile b/package/network/services/dnsmasq/Makefile
index 309083d..942e00a 100644 (file)
--- a/package/network/services/dnsmasq/Makefile
+++ b/package/network/services/dnsmasq/Makefile
@@ -103,7 +103,7 @@ Package/dnsmasq-full/conffiles = $(Package/dnsmasq/conffiles)
 TARGET_CFLAGS += -ffunction-sections -fdata-sections
 TARGET_LDFLAGS += -Wl,--gc-sections
 
-COPTS = $(if $(CONFIG_IPV6),,-DNO_IPV6)
+COPTS = -DNO_ID $(if $(CONFIG_IPV6),,-DNO_IPV6)
 
 ifeq ($(BUILD_VARIANT),nodhcpv6)
        COPTS += -DNO_DHCP6