LIBLWIP - ARP fix

- does not crash KVM anymore

diff --git a/lib/liblwip/netif/etharp.c b/lib/liblwip/netif/etharp.c
index 1b7eb9883940517d8fd90bf37b3553140fa89562..86060a19ce0c686b81011413e3d098ca43d0d450 100644 (file)
--- a/lib/liblwip/netif/etharp.c
+++ b/lib/liblwip/netif/etharp.c
@@ -1189,6 +1189,11 @@ etharp_raw(struct netif *netif, const struct eth_addr *ethsrc_addr,
 
   LWIP_ASSERT("netif != NULL", netif != NULL);
 
+  /* Do not send ARP if the source IP is not set. This may cause various
+   * problems, for instance, triggers an assert in qemu-kvm */
+  if (ipsrc_addr->addr == 0)
+         return ERR_OK;
+
   /* allocate a pbuf for the outgoing ARP request packet */
   p = pbuf_alloc(PBUF_RAW, SIZEOF_ETHARP_PACKET, PBUF_RAM);
   /* could allocate a pbuf for an ARP request? */