parallels: fix crash in prlsdkAddNet in case of CT definition

Since net->model is not defined for containers we shouldn't touch it.
In case network adapter model is defined, a warning about ignoring
it is shown.
Signed-off-by: NMaxim Nestratov <mnestratov@parallels.com>

src/parallels/parallels_sdk.c

@@ -2725,7 +2725,8 @@ static const char * prlsdkFormatMac(virMacAddrPtr mac, char *macstr)
 
 static int prlsdkAddNet(PRL_HANDLE sdkdom,
                         parallelsConnPtr privconn,
-                        virDomainNetDefPtr net)
+                        virDomainNetDefPtr net,
+                        bool isCt)
 {
     PRL_RESULT pret;
     PRL_HANDLE sdknet = PRL_INVALID_HANDLE;
@@ -2757,6 +2758,11 @@ static int prlsdkAddNet(PRL_HANDLE sdkdom,
     pret = PrlVmDevNet_SetMacAddress(sdknet, macstr);
     prlsdkCheckRetGoto(pret, cleanup);
 
+    if (isCt) {
+        if (net->model)
+             VIR_WARN("Setting network adapter for containers is not "
+                      "supported by Parallels Cloud Server.");
+    } else {
         if (STREQ(net->model, "rtl8139")) {
             pret = PrlVmDevNet_SetAdapterType(sdknet, PNT_RTL);
         } else if (STREQ(net->model, "e1000")) {
@@ -2770,6 +2776,7 @@ static int prlsdkAddNet(PRL_HANDLE sdkdom,
             goto cleanup;
         }
         prlsdkCheckRetGoto(pret, cleanup);
+    }
 
     if (net->type == VIR_DOMAIN_NET_TYPE_NETWORK) {
         if (STREQ(net->data.network.name, PARALLELS_DOMAIN_ROUTED_NETWORK_NAME)) {
@@ -3153,7 +3160,7 @@ prlsdkDoApplyConfig(virConnectPtr conn,
     }
 
     for (i = 0; i < def->nnets; i++) {
-        if (prlsdkAddNet(sdkdom, conn->privateData, def->nets[i]) < 0)
+        if (prlsdkAddNet(sdkdom, conn->privateData, def->nets[i], IS_CT(def)) < 0)
            goto error;
     }