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authorPablo Neira Ayuso <pablo@netfilter.org>2006-01-05 12:19:05 -0800
committerDavid S. Miller <davem@davemloft.net>2006-01-05 12:19:05 -0800
commitc1d10adb4a521de5760112853f42aaeefcec96eb (patch)
treec7ba283aa0b9016c8403fa6589b7b3418f71acda /net/ipv6
parent205d67c7d942c057648148fefb17e46f77e3efd6 (diff)
downloadop-kernel-dev-c1d10adb4a521de5760112853f42aaeefcec96eb.zip
op-kernel-dev-c1d10adb4a521de5760112853f42aaeefcec96eb.tar.gz
[NETFILTER]: Add ctnetlink port for nf_conntrack
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c47
-rw-r--r--net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c77
2 files changed, 115 insertions, 9 deletions
diff --git a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
index 753a3ae..704fbbe 100644
--- a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
+++ b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
@@ -401,6 +401,48 @@ static ctl_table nf_ct_net_table[] = {
};
#endif
+#if defined(CONFIG_NF_CT_NETLINK) || \
+ defined(CONFIG_NF_CT_NETLINK_MODULE)
+
+#include <linux/netfilter/nfnetlink.h>
+#include <linux/netfilter/nfnetlink_conntrack.h>
+
+static int ipv6_tuple_to_nfattr(struct sk_buff *skb,
+ const struct nf_conntrack_tuple *tuple)
+{
+ NFA_PUT(skb, CTA_IP_V6_SRC, sizeof(u_int32_t) * 4,
+ &tuple->src.u3.ip6);
+ NFA_PUT(skb, CTA_IP_V6_DST, sizeof(u_int32_t) * 4,
+ &tuple->dst.u3.ip6);
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+static const size_t cta_min_ip[CTA_IP_MAX] = {
+ [CTA_IP_V6_SRC-1] = sizeof(u_int32_t)*4,
+ [CTA_IP_V6_DST-1] = sizeof(u_int32_t)*4,
+};
+
+static int ipv6_nfattr_to_tuple(struct nfattr *tb[],
+ struct nf_conntrack_tuple *t)
+{
+ if (!tb[CTA_IP_V6_SRC-1] || !tb[CTA_IP_V6_DST-1])
+ return -EINVAL;
+
+ if (nfattr_bad_size(tb, CTA_IP_MAX, cta_min_ip))
+ return -EINVAL;
+
+ memcpy(&t->src.u3.ip6, NFA_DATA(tb[CTA_IP_V6_SRC-1]),
+ sizeof(u_int32_t) * 4);
+ memcpy(&t->dst.u3.ip6, NFA_DATA(tb[CTA_IP_V6_DST-1]),
+ sizeof(u_int32_t) * 4);
+
+ return 0;
+}
+#endif
+
struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv6 = {
.l3proto = PF_INET6,
.name = "ipv6",
@@ -409,6 +451,11 @@ struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv6 = {
.print_tuple = ipv6_print_tuple,
.print_conntrack = ipv6_print_conntrack,
.prepare = ipv6_prepare,
+#if defined(CONFIG_NF_CT_NETLINK) || \
+ defined(CONFIG_NF_CT_NETLINK_MODULE)
+ .tuple_to_nfattr = ipv6_tuple_to_nfattr,
+ .nfattr_to_tuple = ipv6_nfattr_to_tuple,
+#endif
.get_features = ipv6_get_features,
.me = THIS_MODULE,
};
diff --git a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
index a7e03cf..09945c3 100644
--- a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
+++ b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
@@ -57,17 +57,17 @@ static int icmpv6_pkt_to_tuple(const struct sk_buff *skb,
return 1;
}
+/* Add 1; spaces filled with 0. */
+static u_int8_t invmap[] = {
+ [ICMPV6_ECHO_REQUEST - 128] = ICMPV6_ECHO_REPLY + 1,
+ [ICMPV6_ECHO_REPLY - 128] = ICMPV6_ECHO_REQUEST + 1,
+ [ICMPV6_NI_QUERY - 128] = ICMPV6_NI_QUERY + 1,
+ [ICMPV6_NI_REPLY - 128] = ICMPV6_NI_REPLY +1
+};
+
static int icmpv6_invert_tuple(struct nf_conntrack_tuple *tuple,
const struct nf_conntrack_tuple *orig)
{
- /* Add 1; spaces filled with 0. */
- static u_int8_t invmap[] = {
- [ICMPV6_ECHO_REQUEST - 128] = ICMPV6_ECHO_REPLY + 1,
- [ICMPV6_ECHO_REPLY - 128] = ICMPV6_ECHO_REQUEST + 1,
- [ICMPV6_NI_QUERY - 128] = ICMPV6_NI_QUERY + 1,
- [ICMPV6_NI_REPLY - 128] = ICMPV6_NI_REPLY +1
- };
-
int type = orig->dst.u.icmp.type - 128;
if (type < 0 || type >= sizeof(invmap) || !invmap[type])
return 0;
@@ -185,7 +185,7 @@ icmpv6_error_message(struct sk_buff *skb,
return -NF_ACCEPT;
}
- inproto = nf_ct_find_proto(PF_INET6, inprotonum);
+ inproto = __nf_ct_proto_find(PF_INET6, inprotonum);
/* Are they talking about one of our connections? */
if (!nf_ct_get_tuple(skb, inip6off, inprotoff, PF_INET6, inprotonum,
@@ -255,6 +255,60 @@ skipped:
return icmpv6_error_message(skb, dataoff, ctinfo, hooknum);
}
+#if defined(CONFIG_NF_CT_NETLINK) || \
+ defined(CONFIG_NF_CT_NETLINK_MODULE)
+
+#include <linux/netfilter/nfnetlink.h>
+#include <linux/netfilter/nfnetlink_conntrack.h>
+static int icmpv6_tuple_to_nfattr(struct sk_buff *skb,
+ const struct nf_conntrack_tuple *t)
+{
+ NFA_PUT(skb, CTA_PROTO_ICMPV6_ID, sizeof(u_int16_t),
+ &t->src.u.icmp.id);
+ NFA_PUT(skb, CTA_PROTO_ICMPV6_TYPE, sizeof(u_int8_t),
+ &t->dst.u.icmp.type);
+ NFA_PUT(skb, CTA_PROTO_ICMPV6_CODE, sizeof(u_int8_t),
+ &t->dst.u.icmp.code);
+
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+static const size_t cta_min_proto[CTA_PROTO_MAX] = {
+ [CTA_PROTO_ICMPV6_TYPE-1] = sizeof(u_int8_t),
+ [CTA_PROTO_ICMPV6_CODE-1] = sizeof(u_int8_t),
+ [CTA_PROTO_ICMPV6_ID-1] = sizeof(u_int16_t)
+};
+
+static int icmpv6_nfattr_to_tuple(struct nfattr *tb[],
+ struct nf_conntrack_tuple *tuple)
+{
+ if (!tb[CTA_PROTO_ICMPV6_TYPE-1]
+ || !tb[CTA_PROTO_ICMPV6_CODE-1]
+ || !tb[CTA_PROTO_ICMPV6_ID-1])
+ return -EINVAL;
+
+ if (nfattr_bad_size(tb, CTA_PROTO_MAX, cta_min_proto))
+ return -EINVAL;
+
+ tuple->dst.u.icmp.type =
+ *(u_int8_t *)NFA_DATA(tb[CTA_PROTO_ICMPV6_TYPE-1]);
+ tuple->dst.u.icmp.code =
+ *(u_int8_t *)NFA_DATA(tb[CTA_PROTO_ICMPV6_CODE-1]);
+ tuple->src.u.icmp.id =
+ *(u_int16_t *)NFA_DATA(tb[CTA_PROTO_ICMPV6_ID-1]);
+
+ if (tuple->dst.u.icmp.type < 128
+ || tuple->dst.u.icmp.type - 128 >= sizeof(invmap)
+ || !invmap[tuple->dst.u.icmp.type - 128])
+ return -EINVAL;
+
+ return 0;
+}
+#endif
+
struct nf_conntrack_protocol nf_conntrack_protocol_icmpv6 =
{
.l3proto = PF_INET6,
@@ -267,6 +321,11 @@ struct nf_conntrack_protocol nf_conntrack_protocol_icmpv6 =
.packet = icmpv6_packet,
.new = icmpv6_new,
.error = icmpv6_error,
+#if defined(CONFIG_NF_CT_NETLINK) || \
+ defined(CONFIG_NF_CT_NETLINK_MODULE)
+ .tuple_to_nfattr = icmpv6_tuple_to_nfattr,
+ .nfattr_to_tuple = icmpv6_nfattr_to_tuple,
+#endif
};
EXPORT_SYMBOL(nf_conntrack_protocol_icmpv6);
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