Currently, dnsmasq removes /tmp/resolv.conf (which is usually a symlink
to /tmp/resolv.conf.auto) and creates its own resolv.conf with at least
a nameserver pointing to 127.0.0.1.
However, in some cases it might not be desired that the router itself
queries its own dnsmasq dns-server but should query the upstream dns
server - possibly fetched via an additional, local dhcp client -
directly instead.
With this new uci configuration option it is possible to prohibit
dnsmasq to change /tmp/resolv.conf, leaving it as provided by the
udhcpd.
Signed-off-by: Linus Lüssing <linus.luess...@web.de>
---
package/dnsmasq/files/dhcp.conf | 1 +
package/dnsmasq/files/dnsmasq.init | 8 ++++++--
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/package/dnsmasq/files/dhcp.conf b/package/dnsmasq/files/dhcp.conf
index 5ba772e..aa5f703 100644
--- a/package/dnsmasq/files/dhcp.conf
+++ b/package/dnsmasq/files/dhcp.conf
@@ -20,6 +20,7 @@ config dnsmasq
#list interface br-lan
#list notinterface lo
#list bogusnxdomain '64.94.110.11'
+ option resolvconfuntouched 0
config dhcp lan
option interface lan
diff --git a/package/dnsmasq/files/dnsmasq.init
b/package/dnsmasq/files/dnsmasq.init
index 8334b38..a578649 100644
--- a/package/dnsmasq/files/dnsmasq.init
+++ b/package/dnsmasq/files/dnsmasq.init
@@ -114,6 +114,8 @@ dnsmasq() {
config_get hostsfile "$cfg" dhcphostsfile
[ -e "$hostsfile" ] && append args "--dhcp-hostsfile=$hostsfile"
+ config_get_bool resolvconfuntouched "$cfg" resolvconfuntouched
+
local rebind
config_get_bool rebind "$cfg" rebind_protection 1
[ $rebind -gt 0 ] && {
@@ -389,8 +391,9 @@ start() {
config_foreach dhcp_srv_add srvhost
config_foreach dhcp_add dhcp
- /usr/sbin/dnsmasq $args && {
+ /usr/sbin/dnsmasq $args && [ ! "$resolvconfuntouched" = "1" ] && {
rm -f /tmp/resolv.conf
+ echo "### Created by dnsmasq.init ###" >> /tmp/resolv.conf
[ -n "$DOMAIN" ] && echo "search $DOMAIN" >> /tmp/resolv.conf
DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
for DNS_SERVER in $DNS_SERVERS ; do
@@ -400,7 +403,8 @@ start() {
}
stop() {
- [ -f /tmp/resolv.conf ] && {
+ [ -f /tmp/resolv.conf ] && \
+ [ "`head -n1 /tmp/resolv.conf`" = "### Created by dnsmasq.init ###" ]
&& {
rm -f /tmp/resolv.conf
ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
}
--
1.7.4.1
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