Report error if a driver can't handle multiple IP addresses

Drivers supporting one and only one IP address raise an error if more IP
addresses are configured.

src/vbox/vbox_common.c

@@ -1254,7 +1254,7 @@ vboxAttachSound(virDomainDefPtr def, IMachine *machine)
     VBOX_RELEASE(audioAdapter);
 }
 
-static void
+static int
 vboxAttachNetwork(virDomainDefPtr def, vboxGlobalData *data, IMachine *machine)
 {
     ISystemProperties *systemProperties = NULL;
@@ -1306,10 +1306,14 @@ vboxAttachNetwork(virDomainDefPtr def, vboxGlobalData *data, IMachine *machine)
         } else if (def->nets[i]->type == VIR_DOMAIN_NET_TYPE_BRIDGE) {
             VIR_DEBUG("NIC(%zu): brname: %s", i, def->nets[i]->data.bridge.brname);
             VIR_DEBUG("NIC(%zu): script: %s", i, def->nets[i]->script);
-            if (def->nets[i]->nips > 0) {
+            if (def->nets[i]->nips == 1) {
                 char *ipStr = virSocketAddrFormat(&def->nets[i]->ips[0]->address);
                 VIR_DEBUG("NIC(%zu): ipaddr: %s", i, ipStr);
                 VIR_FREE(ipStr);
+            } else if (def->nets[i]->nips > 1) {
+                virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                               _("Driver does not support setting multiple IP addresses"));
+                return -1;
             }
         }
 
@@ -1393,6 +1397,7 @@ vboxAttachNetwork(virDomainDefPtr def, vboxGlobalData *data, IMachine *machine)
         gVBoxAPI.UINetworkAdapter.SetMACAddress(adapter, MACAddress);
         VBOX_UTF16_FREE(MACAddress);
     }
+    return 0;
 }
 
 static void
@@ -1938,7 +1943,8 @@ static virDomainPtr vboxDomainDefineXML(virConnectPtr conn, const char *xml)
     vboxSetBootDeviceOrder(def, data, machine);
     vboxAttachDrives(def, data, machine);
     vboxAttachSound(def, machine);
-    vboxAttachNetwork(def, data, machine);
+    if (vboxAttachNetwork(def, data, machine) < 0)
+        goto cleanup;
     vboxAttachSerial(def, data, machine);
     vboxAttachParallel(def, data, machine);
     vboxAttachVideo(def, machine);

src/xenconfig/xen_common.c

@@ -1220,10 +1220,14 @@ xenFormatNet(virConnectPtr conn,
     switch (net->type) {
     case VIR_DOMAIN_NET_TYPE_BRIDGE:
         virBufferAsprintf(&buf, ",bridge=%s", net->data.bridge.brname);
-        if (net->nips > 0) {
+        if (net->nips == 1) {
             char *ipStr = virSocketAddrFormat(&net->ips[0]->address);
             virBufferAsprintf(&buf, ",ip=%s", ipStr);
             VIR_FREE(ipStr);
+        } else if (net->nips > 1) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("Driver does not support setting multiple IP addresses"));
+            goto cleanup;
         }
         virBufferAsprintf(&buf, ",script=%s", DEFAULT_VIF_SCRIPT);
         break;
@@ -1231,10 +1235,14 @@ xenFormatNet(virConnectPtr conn,
     case VIR_DOMAIN_NET_TYPE_ETHERNET:
         if (net->script)
             virBufferAsprintf(&buf, ",script=%s", net->script);
-        if (net->nips > 0) {
+        if (net->nips == 1) {
             char *ipStr = virSocketAddrFormat(&net->ips[0]->address);
             virBufferAsprintf(&buf, ",ip=%s", ipStr);
             VIR_FREE(ipStr);
+        } else if (net->nips > 1) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("Driver does not support setting multiple IP addresses"));
+            goto cleanup;
         }
         break;
 

src/xenconfig/xen_sxpr.c

@@ -1898,10 +1898,14 @@ xenFormatSxprNet(virConnectPtr conn,
             script = def->script;
 
         virBufferEscapeSexpr(buf, "(script '%s')", script);
-        if (def->nips > 0) {
+        if (def->nips == 1) {
             char *ipStr = virSocketAddrFormat(&def->ips[0]->address);
             virBufferEscapeSexpr(buf, "(ip '%s')", ipStr);
             VIR_FREE(ipStr);
+        } else if (def->nips > 1) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("Driver does not support setting multiple IP addresses"));
+            return -1;
         }
         break;
 
@@ -1935,10 +1939,14 @@ xenFormatSxprNet(virConnectPtr conn,
         if (def->script)
             virBufferEscapeSexpr(buf, "(script '%s')",
                                  def->script);
-        if (def->nips > 0) {
+        if (def->nips == 1) {
             char *ipStr = virSocketAddrFormat(&def->ips[0]->address);
             virBufferEscapeSexpr(buf, "(ip '%s')", ipStr);
             VIR_FREE(ipStr);
+        } else if (def->nips > 1) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("Driver does not support setting multiple IP addresses"));
+            return -1;
         }
         break;