[NETFILTER]: nf_ct_h323: remove ipv6 module dependency
nf_conntrack_h323 needs ip6_route_output for the call forwarding filter.
Add a ->route function to nf_afinfo and use that to avoid pulling in the
ipv6 module.
Fix the #ifdef for the IPv6 code while I'm at it - the IPv6 support is
only needed when IPv6 conntrack is enabled.
Signed-off-by: Patrick McHardy <kaber@xxxxxxxxx>
---
commit 7ec6f2c4596936e092f8597908e325b189169cf7
tree 6791d0559110aac276feab3f952fd8201b554573
parent a999d6f9c41df6fdf01d58728d13a450b0712afb
author Patrick McHardy <kaber@xxxxxxxxx> Tue, 04 Dec 2007 10:47:12 +0100
committer Patrick McHardy <kaber@xxxxxxxxx> Tue, 04 Dec 2007 11:28:51 +0100
include/linux/netfilter.h | 2 ++
net/ipv4/netfilter.c | 6 ++++++
net/ipv6/netfilter.c | 7 +++++++
net/netfilter/nf_conntrack_h323_main.c | 19 ++++++++++++-------
4 files changed, 27 insertions(+), 7 deletions(-)
diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index f42e436..9bfc7d4 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -298,10 +298,12 @@ extern void nf_invalidate_cache(int pf);
Returns true or false. */
extern int skb_make_writable(struct sk_buff *skb, unsigned int writable_len);
+struct flowi;
struct nf_afinfo {
unsigned short family;
__sum16 (*checksum)(struct sk_buff *skb, unsigned int hook,
unsigned int dataoff, u_int8_t protocol);
+ int (*route)(struct dst_entry **dst, struct flowi *fl);
void (*saveroute)(const struct sk_buff *skb,
struct nf_info *info);
int (*reroute)(struct sk_buff *skb,
diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c
index d902246..599d448 100644
--- a/net/ipv4/netfilter.c
+++ b/net/ipv4/netfilter.c
@@ -182,9 +182,15 @@ __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
EXPORT_SYMBOL(nf_ip_checksum);
+static int nf_ip_route(struct dst_entry **dst, struct flowi *fl)
+{
+ return ip_route_output_key((struct rtable **)dst, fl);
+}
+
static struct nf_afinfo nf_ip_afinfo = {
.family = AF_INET,
.checksum = nf_ip_checksum,
+ .route = nf_ip_route,
.saveroute = nf_ip_saveroute,
.reroute = nf_ip_reroute,
.route_key_size = sizeof(struct ip_rt_info),
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c
index 175e19f..281f732 100644
--- a/net/ipv6/netfilter.c
+++ b/net/ipv6/netfilter.c
@@ -81,6 +81,12 @@ static int nf_ip6_reroute(struct sk_buff *skb, const struct nf_info *info)
return 0;
}
+static int nf_ip6_route(struct dst_entry **dst, struct flowi *fl)
+{
+ *dst = ip6_route_output(NULL, fl);
+ return (*dst)->error;
+}
+
__sum16 nf_ip6_checksum(struct sk_buff *skb, unsigned int hook,
unsigned int dataoff, u_int8_t protocol)
{
@@ -118,6 +124,7 @@ EXPORT_SYMBOL(nf_ip6_checksum);
static struct nf_afinfo nf_ip6_afinfo = {
.family = AF_INET6,
.checksum = nf_ip6_checksum,
+ .route = nf_ip6_route,
.saveroute = nf_ip6_saveroute,
.reroute = nf_ip6_reroute,
.route_key_size = sizeof(struct ip6_rt_info),
diff --git a/net/netfilter/nf_conntrack_h323_main.c b/net/netfilter/nf_conntrack_h323_main.c
index f23fd95..c550257 100644
--- a/net/netfilter/nf_conntrack_h323_main.c
+++ b/net/netfilter/nf_conntrack_h323_main.c
@@ -708,9 +708,15 @@ static int callforward_do_filter(union nf_conntrack_address *src,
union nf_conntrack_address *dst,
int family)
{
+ struct nf_afinfo *afinfo;
struct flowi fl1, fl2;
int ret = 0;
+ /* rcu_read_lock()ed by nf_hook_slow() */
+ afinfo = nf_get_afinfo(family);
+ if (!afinfo)
+ return 0;
+
memset(&fl1, 0, sizeof(fl1));
memset(&fl2, 0, sizeof(fl2));
@@ -720,8 +726,8 @@ static int callforward_do_filter(union nf_conntrack_address *src,
fl1.fl4_dst = src->ip;
fl2.fl4_dst = dst->ip;
- if (ip_route_output_key(&rt1, &fl1) == 0) {
- if (ip_route_output_key(&rt2, &fl2) == 0) {
+ if (!afinfo->route((struct dst_entry **)&rt1, &fl1)) {
+ if (!afinfo->route((struct dst_entry **)&rt2, &fl2)) {
if (rt1->rt_gateway == rt2->rt_gateway &&
rt1->u.dst.dev == rt2->u.dst.dev)
ret = 1;
@@ -731,16 +737,15 @@ static int callforward_do_filter(union nf_conntrack_address *src,
}
break;
}
-#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+#if defined(CONFIG_NF_CONNTRACK_IPV6) || \
+ defined(CONFIG_NF_CONNTRACK_IPV6_MODULE)
case AF_INET6: {
struct rt6_info *rt1, *rt2;
memcpy(&fl1.fl6_dst, src, sizeof(fl1.fl6_dst));
memcpy(&fl2.fl6_dst, dst, sizeof(fl2.fl6_dst));
- rt1 = (struct rt6_info *)ip6_route_output(NULL, &fl1);
- if (rt1) {
- rt2 = (struct rt6_info *)ip6_route_output(NULL, &fl2);
- if (rt2) {
+ if (!afinfo->route((struct dst_entry **)&rt1, &fl1)) {
+ if (!afinfo->route((struct dst_entry **)&rt2, &fl2)) {
if (!memcmp(&rt1->rt6i_gateway, &rt2->rt6i_gateway,
sizeof(rt1->rt6i_gateway)) &&
rt1->u.dst.dev == rt2->u.dst.dev)
-
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