From: darkcoven <admin@darkcoven.tk>
Date: Sun, 22 Sep 2013 13:55:41 +0000 (+0200)
Subject: Fix crash when writing the wrong type of VLAN
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=feb31655e052b00cfbad44f008c3133dd3e7a3b2;p=ngadmin

Fix crash when writing the wrong type of VLAN
---

diff --git a/lib/src/vlan.c b/lib/src/vlan.c
index 09d6850..d7aa9e5 100644
--- a/lib/src/vlan.c
+++ b/lib/src/vlan.c
@@ -356,11 +356,19 @@ int ngadmin_setVLANDotConf (struct ngadmin *nga, unsigned short vlan, const unsi
 		
 		filterAttributes(attr, ATTR_VLAN_DOT_CONF, ATTR_END);
 		
-		if (attr->first != NULL) {
+		/* check if the switch is in 802.1Q mode */
+		if (attr->first == NULL) {
+			ret = ERR_INVARG;
+			goto end;
+		} else {
 			at = attr->first->data;
-			memcpy(avc, at->data, sizeof(struct attr_vlan_conf) + sa->ports);
+			if (at->size != sizeof(struct attr_vlan_conf) + sa->ports) {
+				ret = ERR_INVARG;
+				goto end;
+			}
 		}
 		
+		memcpy(avc, at->data, sizeof(struct attr_vlan_conf) + sa->ports);
 		clearList(attr, (void(*)(void*))freeAttr);
 	}