unsigned int hooknum)
{
struct nf_conntrack_tuple innertuple, origtuple;
- struct {
- struct icmphdr icmp;
- struct iphdr ip;
- } _in, *inside;
struct nf_conntrack_l4proto *innerproto;
struct nf_conntrack_tuple_hash *h;
- int dataoff;
NF_CT_ASSERT(skb->nfct == NULL);
- /* Not enough header? */
- inside = skb_header_pointer(skb, ip_hdrlen(skb), sizeof(_in), &_in);
- if (inside == NULL)
- return -NF_ACCEPT;
-
- /* Ignore ICMP's containing fragments (shouldn't happen) */
- if (inside->ip.frag_off & htons(IP_OFFSET)) {
- pr_debug("icmp_error_message: fragment of proto %u\n",
- inside->ip.protocol);
+ /* Are they talking about one of our connections? */
+ if (!nf_ct_get_tuplepr(skb,
+ skb_network_offset(skb) + ip_hdrlen(skb)
+ + sizeof(struct icmphdr),
+ PF_INET, &origtuple)) {
+ pr_debug("icmp_error_message: failed to get tuple\n");
return -NF_ACCEPT;
}
/* rcu_read_lock()ed by nf_hook_slow */
- innerproto = __nf_ct_l4proto_find(PF_INET, inside->ip.protocol);
-
- dataoff = ip_hdrlen(skb) + sizeof(inside->icmp);
- /* Are they talking about one of our connections? */
- if (!nf_ct_get_tuple(skb, dataoff, dataoff + inside->ip.ihl*4, PF_INET,
- inside->ip.protocol, &origtuple,
- &nf_conntrack_l3proto_ipv4, innerproto)) {
- pr_debug("icmp_error_message: ! get_tuple p=%u",
- inside->ip.protocol);
- return -NF_ACCEPT;
- }
+ innerproto = __nf_ct_l4proto_find(PF_INET, origtuple.dst.protonum);
/* Ordinarily, we'd expect the inverted tupleproto, but it's
been preserved inside the ICMP. */
h = nf_conntrack_find_get(&innertuple);
if (!h) {
- /* Locally generated ICMPs will match inverted if they
- haven't been SNAT'ed yet */
- /* FIXME: NAT code has to handle half-done double NAT --RR */
- if (hooknum == NF_IP_LOCAL_OUT)
- h = nf_conntrack_find_get(&origtuple);
-
- if (!h) {
- pr_debug("icmp_error_message: no match\n");
- return -NF_ACCEPT;
- }
-
- /* Reverse direction from that found */
- if (NF_CT_DIRECTION(h) == IP_CT_DIR_REPLY)
- *ctinfo += IP_CT_IS_REPLY;
- } else {
- if (NF_CT_DIRECTION(h) == IP_CT_DIR_REPLY)
- *ctinfo += IP_CT_IS_REPLY;
+ pr_debug("icmp_error_message: no match\n");
+ return -NF_ACCEPT;
}
+ if (NF_CT_DIRECTION(h) == IP_CT_DIR_REPLY)
+ *ctinfo += IP_CT_IS_REPLY;
+
/* Update skb to refer to this connection */
skb->nfct = &nf_ct_tuplehash_to_ctrack(h)->ct_general;
skb->nfctinfo = *ctinfo;
#include <linux/netfilter/nfnetlink.h>
#include <linux/netfilter/nfnetlink_conntrack.h>
-static int icmp_tuple_to_nfattr(struct sk_buff *skb,
+static int icmp_tuple_to_nlattr(struct sk_buff *skb,
const struct nf_conntrack_tuple *t)
{
- NFA_PUT(skb, CTA_PROTO_ICMP_ID, sizeof(u_int16_t),
+ NLA_PUT(skb, CTA_PROTO_ICMP_ID, sizeof(u_int16_t),
&t->src.u.icmp.id);
- NFA_PUT(skb, CTA_PROTO_ICMP_TYPE, sizeof(u_int8_t),
+ NLA_PUT(skb, CTA_PROTO_ICMP_TYPE, sizeof(u_int8_t),
&t->dst.u.icmp.type);
- NFA_PUT(skb, CTA_PROTO_ICMP_CODE, sizeof(u_int8_t),
+ NLA_PUT(skb, CTA_PROTO_ICMP_CODE, sizeof(u_int8_t),
&t->dst.u.icmp.code);
return 0;
-nfattr_failure:
+nla_put_failure:
return -1;
}
-static const size_t cta_min_proto[CTA_PROTO_MAX] = {
- [CTA_PROTO_ICMP_TYPE-1] = sizeof(u_int8_t),
- [CTA_PROTO_ICMP_CODE-1] = sizeof(u_int8_t),
- [CTA_PROTO_ICMP_ID-1] = sizeof(u_int16_t)
+static const struct nla_policy icmp_nla_policy[CTA_PROTO_MAX+1] = {
+ [CTA_PROTO_ICMP_TYPE] = { .type = NLA_U8 },
+ [CTA_PROTO_ICMP_CODE] = { .type = NLA_U8 },
+ [CTA_PROTO_ICMP_ID] = { .type = NLA_U16 },
};
-static int icmp_nfattr_to_tuple(struct nfattr *tb[],
+static int icmp_nlattr_to_tuple(struct nlattr *tb[],
struct nf_conntrack_tuple *tuple)
{
- if (!tb[CTA_PROTO_ICMP_TYPE-1]
- || !tb[CTA_PROTO_ICMP_CODE-1]
- || !tb[CTA_PROTO_ICMP_ID-1])
- return -EINVAL;
-
- if (nfattr_bad_size(tb, CTA_PROTO_MAX, cta_min_proto))
+ if (!tb[CTA_PROTO_ICMP_TYPE]
+ || !tb[CTA_PROTO_ICMP_CODE]
+ || !tb[CTA_PROTO_ICMP_ID])
return -EINVAL;
tuple->dst.u.icmp.type =
- *(u_int8_t *)NFA_DATA(tb[CTA_PROTO_ICMP_TYPE-1]);
+ *(u_int8_t *)nla_data(tb[CTA_PROTO_ICMP_TYPE]);
tuple->dst.u.icmp.code =
- *(u_int8_t *)NFA_DATA(tb[CTA_PROTO_ICMP_CODE-1]);
+ *(u_int8_t *)nla_data(tb[CTA_PROTO_ICMP_CODE]);
tuple->src.u.icmp.id =
- *(__be16 *)NFA_DATA(tb[CTA_PROTO_ICMP_ID-1]);
+ *(__be16 *)nla_data(tb[CTA_PROTO_ICMP_ID]);
if (tuple->dst.u.icmp.type >= sizeof(invmap)
|| !invmap[tuple->dst.u.icmp.type])
static struct ctl_table_header *icmp_sysctl_header;
static struct ctl_table icmp_sysctl_table[] = {
{
- .ctl_name = NET_NF_CONNTRACK_ICMP_TIMEOUT,
.procname = "nf_conntrack_icmp_timeout",
.data = &nf_ct_icmp_timeout,
.maxlen = sizeof(unsigned int),
#ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
static struct ctl_table icmp_compat_sysctl_table[] = {
{
- .ctl_name = NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT,
.procname = "ip_conntrack_icmp_timeout",
.data = &nf_ct_icmp_timeout,
.maxlen = sizeof(unsigned int),
#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
#endif /* CONFIG_SYSCTL */
-struct nf_conntrack_l4proto nf_conntrack_l4proto_icmp =
+struct nf_conntrack_l4proto nf_conntrack_l4proto_icmp __read_mostly =
{
.l3proto = PF_INET,
.l4proto = IPPROTO_ICMP,
.destroy = NULL,
.me = NULL,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
- .tuple_to_nfattr = icmp_tuple_to_nfattr,
- .nfattr_to_tuple = icmp_nfattr_to_tuple,
+ .tuple_to_nlattr = icmp_tuple_to_nlattr,
+ .nlattr_to_tuple = icmp_nlattr_to_tuple,
+ .nla_policy = icmp_nla_policy,
#endif
#ifdef CONFIG_SYSCTL
.ctl_table_header = &icmp_sysctl_header,
#endif
#endif
};
-EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_icmp);
git.openpandora.org / pandora-kernel.git / blobdiff