From 00adddbced48da8f0b709a58d981a592f08dd575 Mon Sep 17 00:00:00 2001
From: sven-ola <sven-ola@3484d885-4da6-438d-b19d-107d078dd756>
Date: Wed, 13 Oct 2010 21:09:10 +0000
Subject: git-svn-id: https://map66.svn.sourceforge.net/svnroot/map66@28
 3484d885-4da6-438d-b19d-107d078dd756

---
 ip6t_MAP66.c | 53 ++++++++++++++++++++++++-----------------------------
 1 file changed, 24 insertions(+), 29 deletions(-)

diff --git a/ip6t_MAP66.c b/ip6t_MAP66.c
index afcc57c..6060871 100644
--- a/ip6t_MAP66.c
+++ b/ip6t_MAP66.c
@@ -61,7 +61,24 @@ static void map16(
 #  define __read_mostly
 #  define xt_register_target ip6t_register_target
 #  define xt_unregister_target ip6t_unregister_target
-#  define pr_devel(fmt, ...) ({ if (0); })
+#  ifdef DEBUG
+#    define pr_devel(fmt, ...) printk(fmt, ##__VA_ARGS__)
+#  else
+#    define pr_devel(fmt, ...) ({ if (0); })
+#  endif
+#endif
+
+#ifndef NIP6_FMT
+#define NIP6_FMT "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x"
+#define NIP6(addr) \
+	ntohs((addr).s6_addr16[0]), \
+	ntohs((addr).s6_addr16[1]), \
+	ntohs((addr).s6_addr16[2]), \
+	ntohs((addr).s6_addr16[3]), \
+	ntohs((addr).s6_addr16[4]), \
+	ntohs((addr).s6_addr16[5]), \
+	ntohs((addr).s6_addr16[6]), \
+	ntohs((addr).s6_addr16[7])
 #endif
 
 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,24)
@@ -87,20 +104,12 @@ static bool is_my_ipv6_addr(
 	const struct net_device *dev,
 	const struct in6_addr *addr)
 {
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,28)
 	pr_devel("MAP66: is_my_ipv6_addr(%s, " NIP6_FMT ")\n", NULL != dev ? dev->name : "", NIP6(*addr));
-#else
-	pr_devel("MAP66: is_my_ipv6_addr(%s, %pI6)\n", NULL != dev ? dev->name : "", addr);
-#endif
 	if (NULL != dev) {
 		const struct inet6_ifaddr *ifa;
 		const struct inet6_dev *idev = rcu_dereference(dev->ip6_ptr);
 		for (ifa = idev->addr_list; NULL != ifa; ifa = ifa->if_next) {
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,28)
 			pr_devel("MAP66: cmp " NIP6_FMT "\n", NIP6(ifa->addr));
-#else
-			pr_devel("MAP66: cmp %pI6\n", &ifa->addr);
-#endif
 			if (ipv6_addr_equal(&ifa->addr, addr)) return true;
 		}
 	}
@@ -114,17 +123,10 @@ static unsigned int MAP66_tg6(
 	struct ipv6hdr *hdr = ipv6_hdr(skb);
 	const struct ip6t_MAP66_info *info = par->targinfo;
 
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,28)
 	pr_devel("MAP66: enter in=%s, out=%s, saddr=" NIP6_FMT ", daddr=" NIP6_FMT "\n",
 		NULL != par->in ? par->in->name : "",
 		NULL != par->out ? par->out->name : "",
 		NIP6(hdr->saddr), NIP6(hdr->daddr));
-#else
-	pr_devel("MAP66: enter in=%s, out=%s, saddr=%pI6, daddr=%pI6\n",
-		NULL != par->in ? par->in->name : "",
-		NULL != par->out ? par->out->name : "",
-		&hdr->saddr, &hdr->daddr);
-#endif
 
 #if 0
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
@@ -147,9 +149,9 @@ static unsigned int MAP66_tg6(
 #endif
 
 	if (0 != (IP6T_MAP66_OPT_DST_TO & info->mapflags)) {
-		pr_devel("MAP66 DST, nocheck=%d, ip_summed=%d\n", 0 != (IP6T_MAP66_OPT_NOCHECK & info->mapflags), skb->ip_summed);
-		if (0 != (IP6T_MAP66_OPT_NOCHECK & info->mapflags) ||
-			!is_my_ipv6_addr(par->in, &hdr->daddr))
+		pr_devel("MAP66: DST_TO, ip_summed=%d\n", skb->ip_summed);
+		if (0 != (IP6T_MAP66_OPT_NOCHECK & info->mapflags) || !is_my_ipv6_addr(
+			NF_INET_PRE_ROUTING == par->hooknum ? par->in : par->out, &hdr->daddr))
 		{
 			if (0 != (IP6T_MAP66_OPT_UNBALANCED & info->mapflags)) {
 				memcpy(&hdr->daddr, &info->pfix_dst_to, sizeof(u_int16_t) * info->pfix_dst_len);
@@ -161,31 +163,24 @@ 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);
+		pr_devel("MAP66: SRC_TO, ip_summed=%d\n", skb->ip_summed);
 		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))
+		if (0 == (IP6T_MAP66_OPT_NOCHECK & info->mapflags) && is_my_ipv6_addr(
+			NF_INET_PRE_ROUTING == par->hooknum ? par->in : par->out, &hdr->saddr))
 		{
 			return NF_DROP;
 		}
 	}
 
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,28)
 	pr_devel("MAP66: exit in=%s, out=%s, saddr=" NIP6_FMT ", daddr=" NIP6_FMT "\n",
 		NULL != par->in ? par->in->name : "",
 		NULL != par->out ? par->out->name : "",
 		NIP6(hdr->saddr), NIP6(hdr->daddr));
-#else
-	pr_devel("MAP66: exit in=%s, out=%s, saddr=%pI6, daddr=%pI6\n",
-		NULL != par->in ? par->in->name : "",
-		NULL != par->out ? par->out->name : "",
-		&hdr->saddr, &hdr->daddr);
-#endif
 
 	return IP6T_CONTINUE;
 }
-- 
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