From: Tomas Hruby <tom@minix3.org>
Date: Sat, 13 Oct 2012 21:05:25 +0000 (+0000)
Subject: LIBLWIP - ARP fix
X-Git-Tag: v3.3.0~1068
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/zlib_tech.html?a=commitdiff_plain;h=566af1516a903c2d2c80e21d6dbc07737383a03f;p=minix.git

LIBLWIP - ARP fix

- does not crash KVM anymore
---

diff --git a/lib/liblwip/netif/etharp.c b/lib/liblwip/netif/etharp.c
index 1b7eb9883..86060a19c 100644
--- 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? */