#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(format, args...)
-#endif
-
static int ipv4_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff,
struct nf_conntrack_tuple *tuple)
{
}
/* Returns new sk_buff, or NULL */
-static struct sk_buff *
-nf_ct_ipv4_gather_frags(struct sk_buff *skb, u_int32_t user)
+static int nf_ct_ipv4_gather_frags(struct sk_buff *skb, u_int32_t user)
{
+ int err;
+
skb_orphan(skb);
local_bh_disable();
- skb = ip_defrag(skb, user);
+ err = ip_defrag(skb, user);
local_bh_enable();
- if (skb)
+ if (!err)
ip_send_check(ip_hdr(skb));
- return skb;
+ return err;
}
-static int
-ipv4_prepare(struct sk_buff **pskb, unsigned int hooknum, unsigned int *dataoff,
- u_int8_t *protonum)
+static int ipv4_get_l4proto(const struct sk_buff *skb, unsigned int nhoff,
+ unsigned int *dataoff, u_int8_t *protonum)
{
- /* Never happen */
- if (ip_hdr(*pskb)->frag_off & htons(IP_OFFSET)) {
- if (net_ratelimit()) {
- printk(KERN_ERR "ipv4_prepare: Frag of proto %u (hook=%u)\n",
- ip_hdr(*pskb)->protocol, hooknum);
- }
- return -NF_DROP;
- }
+ struct iphdr _iph, *iph;
- *dataoff = skb_network_offset(*pskb) + ip_hdrlen(*pskb);
- *protonum = ip_hdr(*pskb)->protocol;
-
- return NF_ACCEPT;
-}
+ iph = skb_header_pointer(skb, nhoff, sizeof(_iph), &_iph);
+ if (iph == NULL)
+ return -NF_DROP;
-int nf_nat_module_is_loaded = 0;
-EXPORT_SYMBOL_GPL(nf_nat_module_is_loaded);
+ /* Conntrack defragments packets, we might still see fragments
+ * inside ICMP packets though. */
+ if (iph->frag_off & htons(IP_OFFSET))
+ return -NF_DROP;
-static u_int32_t ipv4_get_features(const struct nf_conntrack_tuple *tuple)
-{
- if (nf_nat_module_is_loaded)
- return NF_CT_F_NAT;
+ *dataoff = nhoff + (iph->ihl << 2);
+ *protonum = iph->protocol;
- return NF_CT_F_BASIC;
+ return NF_ACCEPT;
}
static unsigned int ipv4_confirm(unsigned int hooknum,
- struct sk_buff **pskb,
+ struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
/* We've seen it coming out the other side: confirm it */
- return nf_conntrack_confirm(pskb);
+ return nf_conntrack_confirm(skb);
}
static unsigned int ipv4_conntrack_help(unsigned int hooknum,
- struct sk_buff **pskb,
+ struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
int (*okfn)(struct sk_buff *))
struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
struct nf_conn_help *help;
+ struct nf_conntrack_helper *helper;
/* This is where we call the helper: as the packet goes out. */
- ct = nf_ct_get(*pskb, &ctinfo);
+ ct = nf_ct_get(skb, &ctinfo);
if (!ct || ctinfo == IP_CT_RELATED + IP_CT_IS_REPLY)
return NF_ACCEPT;
help = nfct_help(ct);
- if (!help || !help->helper)
+ if (!help)
return NF_ACCEPT;
-
- return help->helper->help(pskb,
- skb_network_offset(*pskb) + ip_hdrlen(*pskb),
- ct, ctinfo);
+ /* rcu_read_lock()ed by nf_hook_slow */
+ helper = rcu_dereference(help->helper);
+ if (!helper)
+ return NF_ACCEPT;
+ return helper->help(skb, skb_network_offset(skb) + ip_hdrlen(skb),
+ ct, ctinfo);
}
static unsigned int ipv4_conntrack_defrag(unsigned int hooknum,
- struct sk_buff **pskb,
+ struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
-#if !defined(CONFIG_IP_NF_NAT) && !defined(CONFIG_IP_NF_NAT_MODULE)
/* Previously seen (loopback)? Ignore. Do this before
fragment check. */
- if ((*pskb)->nfct)
+ if (skb->nfct)
return NF_ACCEPT;
-#endif
/* Gather fragments. */
- if (ip_hdr(*pskb)->frag_off & htons(IP_MF | IP_OFFSET)) {
- *pskb = nf_ct_ipv4_gather_frags(*pskb,
- hooknum == NF_IP_PRE_ROUTING ?
- IP_DEFRAG_CONNTRACK_IN :
- IP_DEFRAG_CONNTRACK_OUT);
- if (!*pskb)
+ if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) {
+ if (nf_ct_ipv4_gather_frags(skb,
+ hooknum == NF_INET_PRE_ROUTING ?
+ IP_DEFRAG_CONNTRACK_IN :
+ IP_DEFRAG_CONNTRACK_OUT))
return NF_STOLEN;
}
return NF_ACCEPT;
}
static unsigned int ipv4_conntrack_in(unsigned int hooknum,
- struct sk_buff **pskb,
+ struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
- return nf_conntrack_in(PF_INET, hooknum, pskb);
+ return nf_conntrack_in(PF_INET, hooknum, skb);
}
static unsigned int ipv4_conntrack_local(unsigned int hooknum,
- struct sk_buff **pskb,
+ struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
/* root is playing with raw sockets. */
- if ((*pskb)->len < sizeof(struct iphdr)
- || ip_hdrlen(*pskb) < sizeof(struct iphdr)) {
+ if (skb->len < sizeof(struct iphdr) ||
+ ip_hdrlen(skb) < sizeof(struct iphdr)) {
if (net_ratelimit())
printk("ipt_hook: happy cracking.\n");
return NF_ACCEPT;
}
- return nf_conntrack_in(PF_INET, hooknum, pskb);
+ return nf_conntrack_in(PF_INET, hooknum, skb);
}
/* Connection tracking may drop packets, but never alters them, so
.hook = ipv4_conntrack_defrag,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_PRE_ROUTING,
+ .hooknum = NF_INET_PRE_ROUTING,
.priority = NF_IP_PRI_CONNTRACK_DEFRAG,
},
{
.hook = ipv4_conntrack_in,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_PRE_ROUTING,
+ .hooknum = NF_INET_PRE_ROUTING,
.priority = NF_IP_PRI_CONNTRACK,
},
{
.hook = ipv4_conntrack_defrag,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_LOCAL_OUT,
+ .hooknum = NF_INET_LOCAL_OUT,
.priority = NF_IP_PRI_CONNTRACK_DEFRAG,
},
{
.hook = ipv4_conntrack_local,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_LOCAL_OUT,
+ .hooknum = NF_INET_LOCAL_OUT,
.priority = NF_IP_PRI_CONNTRACK,
},
{
.hook = ipv4_conntrack_help,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_POST_ROUTING,
+ .hooknum = NF_INET_POST_ROUTING,
.priority = NF_IP_PRI_CONNTRACK_HELPER,
},
{
.hook = ipv4_conntrack_help,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_LOCAL_IN,
+ .hooknum = NF_INET_LOCAL_IN,
.priority = NF_IP_PRI_CONNTRACK_HELPER,
},
{
.hook = ipv4_confirm,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_POST_ROUTING,
+ .hooknum = NF_INET_POST_ROUTING,
.priority = NF_IP_PRI_CONNTRACK_CONFIRM,
},
{
.hook = ipv4_confirm,
.owner = THIS_MODULE,
.pf = PF_INET,
- .hooknum = NF_IP_LOCAL_IN,
+ .hooknum = NF_INET_LOCAL_IN,
.priority = NF_IP_PRI_CONNTRACK_CONFIRM,
},
};
/* We only do TCP at the moment: is there a better way? */
if (strcmp(sk->sk_prot->name, "TCP")) {
- DEBUGP("SO_ORIGINAL_DST: Not a TCP socket\n");
+ pr_debug("SO_ORIGINAL_DST: Not a TCP socket\n");
return -ENOPROTOOPT;
}
if ((unsigned int) *len < sizeof(struct sockaddr_in)) {
- DEBUGP("SO_ORIGINAL_DST: len %u not %u\n",
- *len, sizeof(struct sockaddr_in));
+ pr_debug("SO_ORIGINAL_DST: len %d not %Zu\n",
+ *len, sizeof(struct sockaddr_in));
return -EINVAL;
}
- h = nf_conntrack_find_get(&tuple, NULL);
+ h = nf_conntrack_find_get(&tuple);
if (h) {
struct sockaddr_in sin;
struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h);
.tuple.dst.u3.ip;
memset(sin.sin_zero, 0, sizeof(sin.sin_zero));
- DEBUGP("SO_ORIGINAL_DST: %u.%u.%u.%u %u\n",
- NIPQUAD(sin.sin_addr.s_addr), ntohs(sin.sin_port));
+ pr_debug("SO_ORIGINAL_DST: %u.%u.%u.%u %u\n",
+ NIPQUAD(sin.sin_addr.s_addr), ntohs(sin.sin_port));
nf_ct_put(ct);
if (copy_to_user(user, &sin, sizeof(sin)) != 0)
return -EFAULT;
else
return 0;
}
- DEBUGP("SO_ORIGINAL_DST: Can't find %u.%u.%u.%u/%u-%u.%u.%u.%u/%u.\n",
- NIPQUAD(tuple.src.u3.ip), ntohs(tuple.src.u.tcp.port),
- NIPQUAD(tuple.dst.u3.ip), ntohs(tuple.dst.u.tcp.port));
+ pr_debug("SO_ORIGINAL_DST: Can't find %u.%u.%u.%u/%u-%u.%u.%u.%u/%u.\n",
+ NIPQUAD(tuple.src.u3.ip), ntohs(tuple.src.u.tcp.port),
+ NIPQUAD(tuple.dst.u3.ip), ntohs(tuple.dst.u.tcp.port));
return -ENOENT;
}
#include <linux/netfilter/nfnetlink.h>
#include <linux/netfilter/nfnetlink_conntrack.h>
-static int ipv4_tuple_to_nfattr(struct sk_buff *skb,
+static int ipv4_tuple_to_nlattr(struct sk_buff *skb,
const struct nf_conntrack_tuple *tuple)
{
- NFA_PUT(skb, CTA_IP_V4_SRC, sizeof(u_int32_t),
+ NLA_PUT(skb, CTA_IP_V4_SRC, sizeof(u_int32_t),
&tuple->src.u3.ip);
- NFA_PUT(skb, CTA_IP_V4_DST, sizeof(u_int32_t),
+ NLA_PUT(skb, CTA_IP_V4_DST, sizeof(u_int32_t),
&tuple->dst.u3.ip);
return 0;
-nfattr_failure:
+nla_put_failure:
return -1;
}
-static const size_t cta_min_ip[CTA_IP_MAX] = {
- [CTA_IP_V4_SRC-1] = sizeof(u_int32_t),
- [CTA_IP_V4_DST-1] = sizeof(u_int32_t),
+static const struct nla_policy ipv4_nla_policy[CTA_IP_MAX+1] = {
+ [CTA_IP_V4_SRC] = { .type = NLA_U32 },
+ [CTA_IP_V4_DST] = { .type = NLA_U32 },
};
-static int ipv4_nfattr_to_tuple(struct nfattr *tb[],
+static int ipv4_nlattr_to_tuple(struct nlattr *tb[],
struct nf_conntrack_tuple *t)
{
- if (!tb[CTA_IP_V4_SRC-1] || !tb[CTA_IP_V4_DST-1])
+ if (!tb[CTA_IP_V4_SRC] || !tb[CTA_IP_V4_DST])
return -EINVAL;
- if (nfattr_bad_size(tb, CTA_IP_MAX, cta_min_ip))
- return -EINVAL;
-
- t->src.u3.ip = *(__be32 *)NFA_DATA(tb[CTA_IP_V4_SRC-1]);
- t->dst.u3.ip = *(__be32 *)NFA_DATA(tb[CTA_IP_V4_DST-1]);
+ t->src.u3.ip = *(__be32 *)nla_data(tb[CTA_IP_V4_SRC]);
+ t->dst.u3.ip = *(__be32 *)nla_data(tb[CTA_IP_V4_DST]);
return 0;
}
.get_optmin = SO_ORIGINAL_DST,
.get_optmax = SO_ORIGINAL_DST+1,
.get = &getorigdst,
+ .owner = THIS_MODULE,
};
-struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv4 = {
+struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv4 __read_mostly = {
.l3proto = PF_INET,
.name = "ipv4",
.pkt_to_tuple = ipv4_pkt_to_tuple,
.invert_tuple = ipv4_invert_tuple,
.print_tuple = ipv4_print_tuple,
.print_conntrack = ipv4_print_conntrack,
- .prepare = ipv4_prepare,
- .get_features = ipv4_get_features,
+ .get_l4proto = ipv4_get_l4proto,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
- .tuple_to_nfattr = ipv4_tuple_to_nfattr,
- .nfattr_to_tuple = ipv4_nfattr_to_tuple,
+ .tuple_to_nlattr = ipv4_tuple_to_nlattr,
+ .nlattr_to_tuple = ipv4_nlattr_to_tuple,
+ .nla_policy = ipv4_nla_policy,
#endif
#if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)
.ctl_table_path = nf_net_ipv4_netfilter_sysctl_path,
.me = THIS_MODULE,
};
+module_param_call(hashsize, nf_conntrack_set_hashsize, param_get_uint,
+ &nf_conntrack_htable_size, 0600);
+
MODULE_ALIAS("nf_conntrack-" __stringify(AF_INET));
MODULE_ALIAS("ip_conntrack");
MODULE_LICENSE("GPL");
module_init(nf_conntrack_l3proto_ipv4_init);
module_exit(nf_conntrack_l3proto_ipv4_fini);
+
+void need_ipv4_conntrack(void)
+{
+ return;
+}
+EXPORT_SYMBOL_GPL(need_ipv4_conntrack);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff