From bc06ff816f8dde2648f6efe5ebe80c3c7a8c6825 Mon Sep 17 00:00:00 2001
From: sven-ola <sven-ola@3484d885-4da6-438d-b19d-107d078dd756>
Date: Wed, 13 Oct 2010 17:48:52 +0000
Subject: fix

git-svn-id: https://map66.svn.sourceforge.net/svnroot/map66@25 3484d885-4da6-438d-b19d-107d078dd756
---
 ip6t_MAP66.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/ip6t_MAP66.c b/ip6t_MAP66.c
index ca0e559..b00c818 100644
--- a/ip6t_MAP66.c
+++ b/ip6t_MAP66.c
@@ -126,10 +126,22 @@ static unsigned int MAP66_tg6(
 		&hdr->saddr, &hdr->daddr);
 #endif
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+	if (skb_cloned(skb) && !skb->sk) {
+		struct sk_buff *nskb = skb_copy(skb, GFP_ATOMIC);
+		if (!nskb) {
+			pr_devel("MAP66: cannot copy, dropped\n");
+			return NF_DROP;
+		}
+		kfree_skb(skb);
+		skb = nskb;
+	}
+#else
 	if (!skb_make_writable(skb, sizeof(struct ipv6hdr))) {
 		pr_devel("MAP66: unwriteable, dropped\n");
 		return NF_DROP;
 	}
+#endif
 	hdr = ipv6_hdr(skb);
 
 	if (0 != (IP6T_MAP66_OPT_DST_TO & info->mapflags)) {
@@ -148,7 +160,12 @@ static unsigned int MAP66_tg6(
 	
 	if (0 != (IP6T_MAP66_OPT_SRC_TO & info->mapflags)) {
 		pr_devel("MAP66 SRC, nocheck=%d, ip_summed=%d\n", 0 != (IP6T_MAP66_OPT_NOCHECK & info->mapflags), skb->ip_summed);
-		map16(&hdr->saddr, &info->pfix_src_to, info->pfix_src_len, info->pfix_src_csum);
+		if (0 != (IP6T_MAP66_OPT_UNBALANCED & info->mapflags)) {
+			memcpy(&hdr->saddr, &info->pfix_src_to, sizeof(u_int16_t) * info->pfix_src_len);
+		}
+		else {
+			map16(&hdr->saddr, &info->pfix_src_to, info->pfix_src_len, info->pfix_src_csum);
+		}
 		if (0 == (IP6T_MAP66_OPT_NOCHECK & info->mapflags) &&
 			is_my_ipv6_addr(par->out, &hdr->saddr))
 		{
-- 
cgit v1.2.3