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diff --git a/geekos/src/lwip/core/ipv6/ip6_addr.c b/geekos/src/lwip/core/ipv6/ip6_addr.c
new file mode 100644
index 0000000..2da6cea
--- /dev/null
+++ b/geekos/src/lwip/core/ipv6/ip6_addr.c
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+#include "lwip/ip_addr.h"
+#include "lwip/inet.h"
+
+u8_t
+ip_addr_netcmp(struct ip_addr *addr1, struct ip_addr *addr2,
+                struct ip_addr *mask)
+{
+  return((addr1->addr[0] & mask->addr[0]) == (addr2->addr[0] & mask->addr[0]) &&
+         (addr1->addr[1] & mask->addr[1]) == (addr2->addr[1] & mask->addr[1]) &&
+         (addr1->addr[2] & mask->addr[2]) == (addr2->addr[2] & mask->addr[2]) &&
+         (addr1->addr[3] & mask->addr[3]) == (addr2->addr[3] & mask->addr[3]));
+        
+}
+
+u8_t
+ip_addr_cmp(struct ip_addr *addr1, struct ip_addr *addr2)
+{
+  return(addr1->addr[0] == addr2->addr[0] &&
+         addr1->addr[1] == addr2->addr[1] &&
+         addr1->addr[2] == addr2->addr[2] &&
+         addr1->addr[3] == addr2->addr[3]);
+}
+
+void
+ip_addr_set(struct ip_addr *dest, struct ip_addr *src)
+{
+  SMEMCPY(dest, src, sizeof(struct ip_addr));
+  /*  dest->addr[0] = src->addr[0];
+  dest->addr[1] = src->addr[1];
+  dest->addr[2] = src->addr[2];
+  dest->addr[3] = src->addr[3];*/
+}
+
+u8_t
+ip_addr_isany(struct ip_addr *addr)
+{
+  if (addr == NULL) return 1;
+  return((addr->addr[0] | addr->addr[1] | addr->addr[2] | addr->addr[3]) == 0);
+}