FIX: Setting the 'flags' to 0 will overwrite NETIF_FLAG_BROADCAST, see...

FIX: Setting the 'flags' to 0 will overwrite NETIF_FLAG_BROADCAST, see ethernetif.c line 140. Also, the IGMP check is redundant( see netif.c line 153). 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@731 bbd45198-f89e-11dd-88c7-29a3b14d5316

components/net/lwip/src/core/netif.c

@@ -63,13 +63,13 @@
 #define NETIF_STATUS_CALLBACK(n) { if (n->status_callback) (n->status_callback)(n); }
 #else
 #define NETIF_STATUS_CALLBACK(n) { /* NOP */ }
-#endif /* LWIP_NETIF_STATUS_CALLBACK */ 
+#endif /* LWIP_NETIF_STATUS_CALLBACK */
 
 #if LWIP_NETIF_LINK_CALLBACK
 #define NETIF_LINK_CALLBACK(n) { if (n->link_callback) (n->link_callback)(n); }
 #else
 #define NETIF_LINK_CALLBACK(n) { /* NOP */ }
-#endif /* LWIP_NETIF_LINK_CALLBACK */ 
+#endif /* LWIP_NETIF_LINK_CALLBACK */
 
 struct netif *netif_list;
 struct netif *netif_default;
@@ -101,7 +101,8 @@ netif_add(struct netif *netif, struct ip_addr *ipaddr, struct ip_addr *netmask,
   netif->ip_addr.addr = 0;
   netif->netmask.addr = 0;
   netif->gw.addr = 0;
-  netif->flags = 0;
+  /* netif->flags = 0; */
+
 #if LWIP_DHCP
   /* netif not under DHCP control by default */
   netif->dhcp = NULL;
@@ -389,17 +390,17 @@ netif_set_default(struct netif *netif)
 /**
  * Bring an interface up, available for processing
  * traffic.
- * 
+ *
  * @note: Enabling DHCP on a down interface will make it come
  * up once configured.
- * 
+ *
  * @see dhcp_start()
- */ 
+ */
 void netif_set_up(struct netif *netif)
 {
   if ( !(netif->flags & NETIF_FLAG_UP )) {
     netif->flags |= NETIF_FLAG_UP;
-    
+
 #if LWIP_SNMP
     snmp_get_sysuptime(&netif->ts);
 #endif /* LWIP_SNMP */
@@ -408,7 +409,7 @@ void netif_set_up(struct netif *netif)
     NETIF_STATUS_CALLBACK(netif);
 
 #if LWIP_ARP
-    /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */ 
+    /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
     if (netif->flags & NETIF_FLAG_ETHARP) {
       etharp_gratuitous(netif);
     }
@@ -428,9 +429,9 @@ void netif_set_up(struct netif *netif)
  *
  * @note: Enabling DHCP on a down interface will make it come
  * up once configured.
- * 
+ *
  * @see dhcp_start()
- */ 
+ */
 void netif_set_down(struct netif *netif)
 {
   if ( netif->flags & NETIF_FLAG_UP )
@@ -439,7 +440,7 @@ void netif_set_down(struct netif *netif)
 #if LWIP_SNMP
       snmp_get_sysuptime(&netif->ts);
 #endif
-      
+
       NETIF_LINK_CALLBACK(netif);
       NETIF_STATUS_CALLBACK(netif);
     }
@@ -447,7 +448,7 @@ void netif_set_down(struct netif *netif)
 
 /**
  * Ask if an interface is up
- */ 
+ */
 u8_t netif_is_up(struct netif *netif)
 {
   return (netif->flags & NETIF_FLAG_UP)?1:0;
@@ -486,7 +487,7 @@ void netif_set_link_up(struct netif *netif )
 
   if (netif->flags & NETIF_FLAG_UP) {
 #if LWIP_ARP
-  /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */ 
+  /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */
   if (netif->flags & NETIF_FLAG_ETHARP) {
     etharp_gratuitous(netif);
   }
@@ -513,7 +514,7 @@ void netif_set_link_down(struct netif *netif )
 
 /**
  * Ask if a link is up
- */ 
+ */
 u8_t netif_is_link_up(struct netif *netif)
 {
   return (netif->flags & NETIF_FLAG_LINK_UP) ? 1 : 0;