#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/ipv6/nf_conntrack_icmpv6.h>
+#include <net/netfilter/nf_log.h>
static unsigned long nf_ct_icmpv6_timeout __read_mostly = 30*HZ;
unsigned int dataoff,
struct nf_conntrack_tuple *tuple)
{
- struct icmp6hdr _hdr, *hp;
+ const struct icmp6hdr *hp;
+ struct icmp6hdr _hdr;
hp = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
if (hp == NULL)
}
/* Add 1; spaces filled with 0. */
-static u_int8_t invmap[] = {
+static const 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,
ntohs(tuple->src.u.icmp.id));
}
-/* Print out the private part of the conntrack. */
-static int icmpv6_print_conntrack(struct seq_file *s,
- const struct nf_conn *conntrack)
-{
- return 0;
-}
-
/* Returns verdict for packet, or -1 for invalid. */
static int icmpv6_packet(struct nf_conn *ct,
const struct sk_buff *skb,
}
/* Called when a new connection for this protocol found. */
-static int icmpv6_new(struct nf_conn *conntrack,
+static int icmpv6_new(struct nf_conn *ct,
const struct sk_buff *skb,
unsigned int dataoff)
{
- static u_int8_t valid_new[] = {
+ static const u_int8_t valid_new[] = {
[ICMPV6_ECHO_REQUEST - 128] = 1,
[ICMPV6_NI_QUERY - 128] = 1
};
- int type = conntrack->tuplehash[0].tuple.dst.u.icmp.type - 128;
+ int type = ct->tuplehash[0].tuple.dst.u.icmp.type - 128;
if (type < 0 || type >= sizeof(valid_new) || !valid_new[type]) {
/* Can't create a new ICMPv6 `conn' with this. */
pr_debug("icmpv6: can't create new conn with type %u\n",
type + 128);
- NF_CT_DUMP_TUPLE(&conntrack->tuplehash[0].tuple);
+ NF_CT_DUMP_TUPLE(&ct->tuplehash[0].tuple);
return 0;
}
- atomic_set(&conntrack->proto.icmp.count, 0);
+ atomic_set(&ct->proto.icmp.count, 0);
return 1;
}
unsigned int hooknum)
{
struct nf_conntrack_tuple intuple, origtuple;
- struct nf_conntrack_tuple_hash *h;
- struct icmp6hdr _hdr, *hp;
- unsigned int inip6off;
- struct nf_conntrack_l4proto *inproto;
- u_int8_t inprotonum;
- unsigned int inprotoff;
+ const struct nf_conntrack_tuple_hash *h;
+ const struct nf_conntrack_l4proto *inproto;
NF_CT_ASSERT(skb->nfct == NULL);
- hp = skb_header_pointer(skb, icmp6off, sizeof(_hdr), &_hdr);
- if (hp == NULL) {
- pr_debug("icmpv6_error: Can't get ICMPv6 hdr.\n");
- return -NF_ACCEPT;
- }
-
- inip6off = icmp6off + sizeof(_hdr);
- if (skb_copy_bits(skb, inip6off+offsetof(struct ipv6hdr, nexthdr),
- &inprotonum, sizeof(inprotonum)) != 0) {
- pr_debug("icmpv6_error: Can't get nexthdr in inner IPv6 "
- "header.\n");
- return -NF_ACCEPT;
- }
- inprotoff = nf_ct_ipv6_skip_exthdr(skb,
- inip6off + sizeof(struct ipv6hdr),
- &inprotonum,
- skb->len - inip6off
- - sizeof(struct ipv6hdr));
-
- if ((inprotoff > skb->len) || (inprotonum == NEXTHDR_FRAGMENT)) {
- pr_debug("icmpv6_error: Can't get protocol header in ICMPv6 "
- "payload.\n");
- return -NF_ACCEPT;
- }
-
- /* rcu_read_lock()ed by nf_hook_slow */
- inproto = __nf_ct_l4proto_find(PF_INET6, inprotonum);
-
/* Are they talking about one of our connections? */
- if (!nf_ct_get_tuple(skb, inip6off, inprotoff, PF_INET6, inprotonum,
- &origtuple, &nf_conntrack_l3proto_ipv6, inproto)) {
+ if (!nf_ct_get_tuplepr(skb,
+ skb_network_offset(skb)
+ + sizeof(struct ipv6hdr)
+ + sizeof(struct icmp6hdr),
+ PF_INET6, &origtuple)) {
pr_debug("icmpv6_error: Can't get tuple\n");
return -NF_ACCEPT;
}
+ /* rcu_read_lock()ed by nf_hook_slow */
+ inproto = __nf_ct_l4proto_find(PF_INET6, origtuple.dst.protonum);
+
/* Ordinarily, we'd expect the inverted tupleproto, but it's
been preserved inside the ICMP. */
if (!nf_ct_invert_tuple(&intuple, &origtuple,
icmpv6_error(struct sk_buff *skb, unsigned int dataoff,
enum ip_conntrack_info *ctinfo, int pf, unsigned int hooknum)
{
- struct icmp6hdr _ih, *icmp6h;
+ const struct icmp6hdr *icmp6h;
+ struct icmp6hdr _ih;
icmp6h = skb_header_pointer(skb, dataoff, sizeof(_ih), &_ih);
if (icmp6h == NULL) {
return -NF_ACCEPT;
}
- if (nf_conntrack_checksum && hooknum == NF_IP6_PRE_ROUTING &&
+ if (nf_conntrack_checksum && hooknum == NF_INET_PRE_ROUTING &&
nf_ip6_checksum(skb, hooknum, dataoff, IPPROTO_ICMPV6)) {
nf_log_packet(PF_INET6, 0, skb, NULL, NULL, NULL,
"nf_ct_icmpv6: ICMPv6 checksum failed\n");
#include <linux/netfilter/nfnetlink.h>
#include <linux/netfilter/nfnetlink_conntrack.h>
-static int icmpv6_tuple_to_nfattr(struct sk_buff *skb,
+static int icmpv6_tuple_to_nlattr(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);
+ NLA_PUT_BE16(skb, CTA_PROTO_ICMPV6_ID, t->src.u.icmp.id);
+ NLA_PUT_U8(skb, CTA_PROTO_ICMPV6_TYPE, t->dst.u.icmp.type);
+ NLA_PUT_U8(skb, CTA_PROTO_ICMPV6_CODE, 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_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 const struct nla_policy icmpv6_nla_policy[CTA_PROTO_MAX+1] = {
+ [CTA_PROTO_ICMPV6_TYPE] = { .type = NLA_U8 },
+ [CTA_PROTO_ICMPV6_CODE] = { .type = NLA_U8 },
+ [CTA_PROTO_ICMPV6_ID] = { .type = NLA_U16 },
};
-static int icmpv6_nfattr_to_tuple(struct nfattr *tb[],
+static int icmpv6_nlattr_to_tuple(struct nlattr *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))
+ if (!tb[CTA_PROTO_ICMPV6_TYPE]
+ || !tb[CTA_PROTO_ICMPV6_CODE]
+ || !tb[CTA_PROTO_ICMPV6_ID])
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 =
- *(__be16 *)NFA_DATA(tb[CTA_PROTO_ICMPV6_ID-1]);
+ tuple->dst.u.icmp.type = nla_get_u8(tb[CTA_PROTO_ICMPV6_TYPE]);
+ tuple->dst.u.icmp.code = nla_get_u8(tb[CTA_PROTO_ICMPV6_CODE]);
+ tuple->src.u.icmp.id = nla_get_be16(tb[CTA_PROTO_ICMPV6_ID]);
if (tuple->dst.u.icmp.type < 128
|| tuple->dst.u.icmp.type - 128 >= sizeof(invmap)
static struct ctl_table_header *icmpv6_sysctl_header;
static struct ctl_table icmpv6_sysctl_table[] = {
{
- .ctl_name = NET_NF_CONNTRACK_ICMPV6_TIMEOUT,
.procname = "nf_conntrack_icmpv6_timeout",
.data = &nf_ct_icmpv6_timeout,
.maxlen = sizeof(unsigned int),
};
#endif /* CONFIG_SYSCTL */
-struct nf_conntrack_l4proto nf_conntrack_l4proto_icmpv6 =
+struct nf_conntrack_l4proto nf_conntrack_l4proto_icmpv6 __read_mostly =
{
.l3proto = PF_INET6,
.l4proto = IPPROTO_ICMPV6,
.pkt_to_tuple = icmpv6_pkt_to_tuple,
.invert_tuple = icmpv6_invert_tuple,
.print_tuple = icmpv6_print_tuple,
- .print_conntrack = icmpv6_print_conntrack,
.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,
+ .tuple_to_nlattr = icmpv6_tuple_to_nlattr,
+ .nlattr_to_tuple = icmpv6_nlattr_to_tuple,
+ .nla_policy = icmpv6_nla_policy,
#endif
#ifdef CONFIG_SYSCTL
.ctl_table_header = &icmpv6_sysctl_header,
.ctl_table = icmpv6_sysctl_table,
#endif
};
-
-EXPORT_SYMBOL(nf_conntrack_l4proto_icmpv6);