network-generator: vlan= can be specified multiple times

(cherry picked from commit 9eee6b1)
(cherry picked from commit f3baba9)

Author: yuwata

src/network/generator/network-generator.c

@@ -181,7 +181,7 @@ static Network *network_free(Network *network) {
         free(network->ifname);
         free(network->hostname);
         strv_free(network->dns);
-        free(network->vlan);
+        strv_free(network->vlan);
         free(network->bridge);
         free(network->bond);
 
@@ -531,7 +531,7 @@ static int network_set_vlan(Context *context, const char *ifname, const char *va
                         return r;
         }
 
-        return free_and_strdup(&network->vlan, value);
+        return strv_extend(&network->vlan, value);
 }
 
 static int network_set_bridge(Context *context, const char *ifname, const char *value) {
@@ -1315,8 +1315,8 @@ void network_dump(Network *network, FILE *f) {
                 STRV_FOREACH(dns, network->dns)
                         fprintf(f, "DNS=%s\n", *dns);
 
-        if (network->vlan)
-                fprintf(f, "VLAN=%s\n", network->vlan);
+        STRV_FOREACH(v, network->vlan)
+                fprintf(f, "VLAN=%s\n", *v);
 
         if (network->bridge)
                 fprintf(f, "Bridge=%s\n", network->bridge);

src/network/generator/network-generator.h

@@ -62,7 +62,7 @@ struct Network {
         /* [Network] */
         DHCPType dhcp_type;
         char **dns;
-        char *vlan;
+        char **vlan;
         char *bridge;
         char *bond;
 

src/network/generator/test-network-generator.c

@@ -283,12 +283,13 @@ int main(int argc, char *argv[]) {
                          "UseDNS=yes\n"
                          );
 
-        test_network_one("eth0", "vlan", "vlan99:eth0",
+        test_network_two("eth0", "vlan", "vlan99:eth0", "vlan", "vlan98:eth0",
                          "[Match]\n"
                          "Name=eth0\n"
                          "\n[Link]\n"
                          "\n[Network]\n"
                          "VLAN=vlan99\n"
+                         "VLAN=vlan98\n"
                          "\n[DHCP]\n"
                          );