[5058] CSVLeaseFile4 now properly loads declined leases

src/lib/dhcpsrv/csv_lease_file4.cc
    CSVLeaseFile4::next() - modified to produce a read error
    if the hardware address is empty and the lease state
    is NOT declined.

    CSVLeaseFile4::readHWAddr() - no longer throws an exception
    if the hardware address is empty

src/lib/dhcpsrv/tests/csv_lease_file4_unittest.cc
src/lib/dhcpsrv/tests/lease_file_loader_unittest.cc
    Changed test lease data so invalid records do not
    have lease state of declined

src/lib/dhcpsrv/csv_lease_file4.cc

@@ -97,6 +97,12 @@ CSVLeaseFile4::next(Lease4Ptr& lease) {
         // Get the HW address. It should never be empty and the readHWAddr checks
         // that.
         HWAddr hwaddr = readHWAddr(row);
+        uint32_t state = readState(row);
+        if (hwaddr.hwaddr_.empty() && state != Lease::STATE_DECLINED) {
+            isc_throw(isc::BadValue, "A blank hardware address is only"
+                      " valid for declined leases");
+        }
+
         lease.reset(new Lease4(readAddress(row),
                                HWAddrPtr(new HWAddr(hwaddr)),
                                client_id_vec.empty() ? NULL : &client_id_vec[0],
@@ -108,7 +114,7 @@ CSVLeaseFile4::next(Lease4Ptr& lease) {
                                readFqdnFwd(row),
                                readFqdnRev(row),
                                readHostname(row)));
-        lease->state_ = readState(row);
+        lease->state_ = state;
 
     } catch (std::exception& ex) {
         // bump the read error count
@@ -152,10 +158,6 @@ CSVLeaseFile4::readAddress(const CSVRow& row) {
 HWAddr
 CSVLeaseFile4::readHWAddr(const CSVRow& row) {
     HWAddr hwaddr = HWAddr::fromText(row.readAt(getColumnIndex("hwaddr")));
-    if (hwaddr.hwaddr_.empty()) {
-        isc_throw(isc::BadValue, "hardware address in the lease file"
-                  " must not be empty");
-    }
     return (hwaddr);
 }
 

src/lib/dhcpsrv/tests/csv_lease_file4_unittest.cc

@@ -103,7 +103,7 @@ CSVLeaseFile4Test::writeSampleFile() const {
                   "fqdn_fwd,fqdn_rev,hostname,state\n"
                   "192.0.2.1,06:07:08:09:0a:bc,,200,200,8,1,1,"
                   "host.example.com,0\n"
-                  "192.0.2.1,,a:11:01:04,200,200,8,1,1,host.example.com,1\n"
+                  "192.0.2.1,,a:11:01:04,200,200,8,1,1,host.example.com,0\n"
                   "192.0.3.15,dd:de:ba:0d:1b:2e:3e:4f,0a:00:01:04,100,100,7,"
                   "0,0,,1\n");
 }
@@ -145,7 +145,8 @@ TEST_F(CSVLeaseFile4Test, parse) {
     EXPECT_EQ(Lease::STATE_DEFAULT, lease->state_);
     }
 
-    // Second lease is malformed - HW address is empty.
+    // Second lease is malformed - HW address is empty when state 
+    // is not delcined.
     {
     SCOPED_TRACE("Second lease malformed");
     EXPECT_FALSE(lf.next(lease));

src/lib/dhcpsrv/tests/lease_file_loader_unittest.cc

@@ -181,7 +181,7 @@ TEST_F(LeaseFileLoaderTest, loadWrite4) {
                       "100,135,7,0,0,,1\n";
 
     std::string c_1 = "192.0.2.3,,a:11:01:04,"
-                      "200,200,8,1,1,host.example.com,1\n";
+                      "200,200,8,1,1,host.example.com,0\n";
 
     // Create lease file with leases for 192.0.2.1, 192.0.3.15. The lease
     // entry for the 192.0.2.3 is invalid (lacks HW address) and should
@@ -427,7 +427,7 @@ TEST_F(LeaseFileLoaderTest, loadMaxErrors) {
     std::string a_2 = "192.0.2.1,06:07:08:09:0a:bc,,"
                       "200,500,8,1,1,host.example.com,1\n";
 
-    std::string b_1 = "192.0.2.3,,a:11:01:04,200,200,8,1,1,host.example.com,1\n";
+    std::string b_1 = "192.0.2.3,,a:11:01:04,200,200,8,1,1,host.example.com,0\n";
 
     std::string c_1 = "192.0.2.10,01:02:03:04:05:06,,200,300,8,1,1,,1\n";