From 06df1647e17d16c5b40355b06edc534bc9510a71 Mon Sep 17 00:00:00 2001
From: jifl <jifl>
Date: Fri, 3 Oct 2008 14:47:33 +0000
Subject: [PATCH]   * etharp.c (etharp_arp_input): Fix type aliasing problem
 copying ip address.

---
 CHANGELOG          | 3 +++
 src/netif/etharp.c | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG b/CHANGELOG
index 0ed73a00..e177599b 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -51,6 +51,9 @@ HISTORY
 
   ++ Bugfixes:
 
+  2008-10-03 David Woodhouse, Jonathan Larmour
+  * etharp.c (etharp_arp_input): Fix type aliasing problem copying ip address.
+
   2008-10-02 Jonathan Larmour
   * dns.c: Hard-code structure sizes, to avoid issues on some compilers where
   padding is included.
diff --git a/src/netif/etharp.c b/src/netif/etharp.c
index f5a6473d..ab8586c3 100644
--- a/src/netif/etharp.c
+++ b/src/netif/etharp.c
@@ -705,7 +705,7 @@ etharp_arp_input(struct netif *netif, struct eth_addr *ethaddr, struct pbuf *p)
       hdr->opcode = htons(ARP_REPLY);
 
       hdr->dipaddr = hdr->sipaddr;
-      hdr->sipaddr = *(struct ip_addr2 *)&netif->ip_addr;
+      SMEMCPY(&hdr->sipaddr, &netif->ip_addr, sizeof(hdr->sipaddr));
 
       LWIP_ASSERT("netif->hwaddr_len must be the same as ETHARP_HWADDR_LEN for etharp!",
                   (netif->hwaddr_len == ETHARP_HWADDR_LEN));