+ parse "config dnsmasq"

AGHTechDoc.md

@@ -1619,6 +1619,9 @@ If started as:
 			option limit '150'
 			option leasetime '12h'
 
+		config dnsmasq
+			option leasefile '/tmp/dhcp.leases'
+
 * Write this yaml configuration:
 
 		dhcp:
@@ -1630,6 +1633,7 @@ If started as:
 			range_end: "192.168.8.249"
 			lease_duration: 86400
 			icmp_timeout_msec: 1000
+			dnsmasq_leasefile "/tmp/dhcp.leases"
 
 * Read `/etc/config/dhcp`:
 
@@ -1654,16 +1658,6 @@ If started as:
 			- IP1
 			- IP2
 
-* Read `/etc/config/dhcp`:
-
-		config dnsmasq
-			option leasefile '/tmp/dhcp.leases'
-
-* Write this yaml configuration:
-
-		dhcp:
-			dnsmasq_leasefile "/tmp/dhcp.leases"
-
 And service script starts AGH like this:
 
 	.../AdGuardHome --import-openwrt-config

home/openwrt.go

@@ -19,9 +19,10 @@ type openwrtConfig struct {
 	ipaddr  string
 
 	// dhcp:
-	dhcpStart     string
-	dhcpLimit     string
-	dhcpLeasetime string
+	dhcpStart            string
+	dhcpLimit            string
+	dhcpLeasetime        string
+	dhcpDnsmasqLeaseFile string
 
 	// dhcp static leases:
 	leases []dhcpd.Lease
@@ -64,7 +65,7 @@ func (oc *openwrtConfig) readConf(data []byte, section string, iface string) {
 		line, err := r.ReadString('\n')
 		line = strings.TrimSpace(line)
 		if len(line) == 0 {
-			if state == 2 {
+			if state >= 2 {
 				return
 			}
 			state = 0
@@ -82,6 +83,8 @@ func (oc *openwrtConfig) readConf(data []byte, section string, iface string) {
 						state = 2 // found the needed interface
 					} else if word2 == "dhcp" {
 						state = 3
+					} else if word2 == "dnsmasq" {
+						state = 4
 					}
 				}
 			}
@@ -113,6 +116,15 @@ func (oc *openwrtConfig) readConf(data []byte, section string, iface string) {
 			case "leasetime":
 				oc.dhcpLeasetime = word3
 			}
+
+		case 4:
+			if word1 != "option" {
+				break
+			}
+			switch word2 {
+			case "leasefile":
+				oc.dhcpDnsmasqLeaseFile = word3
+			}
 		}
 
 		if err != nil {
@@ -269,6 +281,7 @@ func (oc *openwrtConfig) Process() error {
 		return err
 	}
 	oc.readConf(data, "dhcp", "lan")
+	oc.readConf(data, "dnsmasq", "")
 
 	err = oc.prepareOutput()
 	if err != nil {
@@ -318,6 +331,7 @@ func importOpenwrtConfig(configFn string) error {
 	config.DHCP.RangeStart = oc.rangeStart
 	config.DHCP.RangeEnd = oc.rangeEnd
 	config.DHCP.LeaseDuration = oc.leaseDur
+	config.DHCP.DnsmasqFilePath = oc.dhcpDnsmasqLeaseFile
 
 	err = config.write()
 	if err != nil {

home/openwrt_test.go

@@ -8,6 +8,8 @@ import (
 
 func TestReadConf(t *testing.T) {
 	oc := openwrtConfig{}
+
+	// "interface"
 	data := []byte(`		config interface 'lan'
 option netmask '255.255.255.0'
 option ipaddr '192.168.8.1'`)
@@ -15,6 +17,7 @@ option ipaddr '192.168.8.1'`)
 	assert.Equal(t, "255.255.255.0", oc.netmask)
 	assert.Equal(t, "192.168.8.1", oc.ipaddr)
 
+	// "dhcp"
 	data = []byte(`		config dhcp 'unknown'
 
 config dhcp 'lan'
@@ -28,6 +31,7 @@ config dhcp 'unknown'`)
 	assert.Equal(t, "150", oc.dhcpLimit)
 	assert.Equal(t, "12h", oc.dhcpLeasetime)
 
+	// resolv.conf
 	data = []byte(`		# comment
 nameserver abab::1234
 
@@ -36,6 +40,7 @@ nameserver 1.2.3.4`)
 	assert.Equal(t, "abab::1234", oc.nameservers[0])
 	assert.Equal(t, "1.2.3.4", oc.nameservers[1])
 
+	// prepareOutput()
 	err := oc.prepareOutput()
 	assert.Equal(t, nil, err)
 	assert.Equal(t, "br-lan", oc.iface)
@@ -73,6 +78,7 @@ nameserver 1.2.3.4`)
 	assert.True(t, oc.prepareOutput() != nil)
 	oc.dhcpLeasetime = tmp
 
+	// dhcp static leases
 	data = []byte(`config host '123412341234'
 option mac '12:34:12:34:12:34'
 option ip '192.168.8.2'
@@ -82,4 +88,17 @@ option name 'hostname'`)
 	assert.Equal(t, "12:34:12:34:12:34", oc.leases[0].HWAddr.String())
 	assert.Equal(t, "192.168.8.2", oc.leases[0].IP.String())
 	assert.Equal(t, "hostname", oc.leases[0].Hostname)
+
+	// "dnsmasq"
+	// Note: "config dnsmasq ''" will also work
+	data = []byte(`
+config dhcp 'unknown'
+	option asdf '100'
+
+config dnsmasq
+	option asdf '100'
+	option leasefile '/tmp/dhcp.leases'
+	option leasetime '12h'`)
+	oc.readConf(data, "dnsmasq", "")
+	assert.Equal(t, "/tmp/dhcp.leases", oc.dhcpDnsmasqLeaseFile)
 }