check the ip address returned from nextClear() is in range, to show c…

…orrect erroir message.

netmaster/master/network.go

@@ -363,7 +363,7 @@ func networkAllocAddress(nwCfg *mastercfg.CfgNetworkState, epgCfg *mastercfg.End
 		} else {
 			if epgCfg != nil && len(epgCfg.IPPool) > 0 { // allocate from epg network
 				log.Infof("allocating ip address from epg pool %s", epgCfg.IPPool)
-				ipAddrValue, found = epgCfg.EPGIPAllocMap.NextClear(0)
+				ipAddrValue, found = netutils.NextClear(epgCfg.EPGIPAllocMap, 0, nwCfg.SubnetLen)
 				if !found {
 					log.Errorf("auto allocation failed - address exhaustion in pool %s",
 						epgCfg.IPPool)
@@ -378,7 +378,7 @@ func networkAllocAddress(nwCfg *mastercfg.CfgNetworkState, epgCfg *mastercfg.End
 				}
 				epgCfg.EPGIPAllocMap.Set(ipAddrValue)
 			} else {
-				ipAddrValue, found = nwCfg.IPAllocMap.NextClear(0)
+				ipAddrValue, found = netutils.NextClear(nwCfg.IPAllocMap, 0, nwCfg.SubnetLen)
 				if !found {
 					log.Errorf("auto allocation failed - address exhaustion in subnet %s/%d",
 						nwCfg.SubnetIP, nwCfg.SubnetLen)

test/integration/endpoint_test.go

@@ -217,6 +217,61 @@ func (its *integTestSuite) TestEndpointGroupCreateDelete(c *C) {
 	}
 
 	assertNoErr(its.client.NetworkDelete("default", "test"), c, "deleting network")
+
+	// test network/epg subnet
+	nwData := []struct {
+		subnet      string
+		availableIP string
+	}{
+
+		{subnet: "10.100.100.194-10.100.100.222/27", availableIP: "10.100.100.194-10.100.100.222"},
+		{subnet: "10.1.1.5-10.1.1.15/27", availableIP: "10.1.1.5-10.1.1.15"},
+		{subnet: "10.1.1.0/27", availableIP: "10.1.1.1-10.1.1.30"},
+		{subnet: "10.1.1.0/28", availableIP: "10.1.1.1-10.1.1.14"},
+		{subnet: "10.1.1.0/29", availableIP: "10.1.1.1-10.1.1.6"},
+		{subnet: "10.1.1.0/30", availableIP: "10.1.1.1-10.1.1.2"},
+		{subnet: "10.1.1.0/31"},
+	}
+	for _, nwRange := range nwData {
+		err := its.client.NetworkPost(&client.Network{
+			TenantName:  "default",
+			NetworkName: "subnet-test1",
+			Subnet:      nwRange.subnet,
+			Encap:       its.encap,
+		})
+		assertNoErr(err, c, "creating network")
+
+		// inspect
+		nInspect, err := its.client.NetworkInspect("default", "subnet-test1")
+		assertNoErr(err, c, fmt.Sprintf("inspect failed for %+v", nwRange.subnet))
+		assertOnTrue(c, nInspect.Oper.AllocatedIPAddresses != "",
+			fmt.Sprintf("invalid allocated address %+v", nInspect))
+		assertOnTrue(c, nInspect.Oper.AvailableIPAddresses != nwRange.availableIP,
+			fmt.Sprintf("invalid available  address %+v", nInspect))
+
+
+		// check epg
+		err = its.client.EndpointGroupPost(&client.EndpointGroup{
+			TenantName:       "default",
+			NetworkName:      "subnet-test1",
+			GroupName:        "epg1",
+			IpPool:           nwRange.availableIP,
+			Policies:         []string{},
+			ExtContractsGrps: []string{},
+		})
+		assertNoErr(err, c, fmt.Sprintf("create epg %+v", "epg1"))
+		// inspect
+		dInspect, e := its.client.EndpointGroupInspect("default", "epg1")
+		assertNoErr(e, c, fmt.Sprintf("inspect failed for %+v", nwRange))
+		assertOnTrue(c, dInspect.Oper.AllocatedIPAddresses != "",
+			fmt.Sprintf("invalid allocated address %+v", dInspect))
+		assertOnTrue(c, dInspect.Oper.AvailableIPAddresses != nwRange.availableIP,
+			fmt.Sprintf("invalid available  address %+v", dInspect))
+		assertNoErr(its.client.EndpointGroupDelete("default", "epg1"), c, "delete epg")
+
+		assertNoErr(its.client.NetworkDelete("default", "subnet-test1"), c, "deleting network")
+	}
+
 }
 
 // TestEndpointGrouIPPoolCreateDelete tests EPG with IPAM create delete ops

utils/netutils/netutils.go

@@ -994,6 +994,17 @@ func ListAllocatedIPs(allocMap bitset.BitSet, ipPool string, subnetIP string, su
 	return strings.Join(list, ", ")
 }
 
+// NextClear wrapper around Bitset to check max id
+func NextClear(allocMap bitset.BitSet, idx uint, subnetLen uint) (uint, bool) {
+	maxHosts := uint(1 << (32 - subnetLen))
+
+	value, found := allocMap.NextClear(idx)
+	if found && value >= maxHosts {
+		return 0, false
+	}
+	return value, found
+}
+
 // ListAvailableIPs returns a string of available IPs in a network
 func ListAvailableIPs(allocMap bitset.BitSet, subnetIP string, subnetLen uint) string {
 	idx := uint(0)
@@ -1002,7 +1013,7 @@ func ListAvailableIPs(allocMap bitset.BitSet, subnetIP string, subnetLen uint) s
 	inRange := false
 
 	for {
-		foundValue, found := allocMap.NextClear(idx)
+		foundValue, found := NextClear(allocMap, idx, subnetLen)
 		if !found {
 			break
 		}