* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
- *
- * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
- * - move L3 protocol dependent part to this file.
- * 23 Mar 2004: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
- * - add get_features() to support various size of conntrack
- * structures.
- *
- * Derived from net/ipv4/netfilter/ip_conntrack_standalone.c
*/
-#include <linux/config.h>
#include <linux/types.h>
#include <linux/ip.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_helper.h>
-#include <net/netfilter/nf_conntrack_protocol.h>
+#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_l3proto.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
+#include <net/netfilter/nf_nat_helper.h>
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(format, args...)
-#endif
+int (*nf_nat_seq_adjust_hook)(struct sk_buff *skb,
+ struct nf_conn *ct,
+ enum ip_conntrack_info ctinfo);
+EXPORT_SYMBOL_GPL(nf_nat_seq_adjust_hook);
-DECLARE_PER_CPU(struct nf_conntrack_stat, nf_conntrack_stat);
-
-static int ipv4_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff,
- struct nf_conntrack_tuple *tuple)
+static bool ipv4_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff,
+ struct nf_conntrack_tuple *tuple)
{
- u_int32_t _addrs[2], *ap;
+ const __be32 *ap;
+ __be32 _addrs[2];
ap = skb_header_pointer(skb, nhoff + offsetof(struct iphdr, saddr),
sizeof(u_int32_t) * 2, _addrs);
if (ap == NULL)
- return 0;
+ return false;
tuple->src.u3.ip = ap[0];
tuple->dst.u3.ip = ap[1];
- return 1;
+ return true;
}
-static int ipv4_invert_tuple(struct nf_conntrack_tuple *tuple,
- const struct nf_conntrack_tuple *orig)
+static bool ipv4_invert_tuple(struct nf_conntrack_tuple *tuple,
+ const struct nf_conntrack_tuple *orig)
{
tuple->src.u3.ip = orig->dst.u3.ip;
tuple->dst.u3.ip = orig->src.u3.ip;
- return 1;
+ return true;
}
static int ipv4_print_tuple(struct seq_file *s,
const struct nf_conntrack_tuple *tuple)
{
return seq_printf(s, "src=%u.%u.%u.%u dst=%u.%u.%u.%u ",
- NIPQUAD(tuple->src.u3.ip),
+ NIPQUAD(tuple->src.u3.ip),
NIPQUAD(tuple->dst.u3.ip));
}
-static int ipv4_print_conntrack(struct seq_file *s,
- const struct nf_conn *conntrack)
-{
- return 0;
-}
-
/* 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);
- local_bh_enable();
+ local_bh_disable();
+ err = ip_defrag(skb, user);
+ local_bh_enable();
- if (skb)
- ip_send_check(skb->nh.iph);
+ 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 ((*pskb)->nh.iph->frag_off & htons(IP_OFFSET)) {
- if (net_ratelimit()) {
- printk(KERN_ERR "ipv4_prepare: Frag of proto %u (hook=%u)\n",
- (*pskb)->nh.iph->protocol, hooknum);
- }
- return -NF_DROP;
- }
+ const struct iphdr *iph;
+ struct iphdr _iph;
- *dataoff = (*pskb)->nh.raw - (*pskb)->data + (*pskb)->nh.iph->ihl*4;
- *protonum = (*pskb)->nh.iph->protocol;
+ iph = skb_header_pointer(skb, nhoff, sizeof(_iph), &_iph);
+ if (iph == NULL)
+ return -NF_DROP;
- return NF_ACCEPT;
-}
+ /* Conntrack defragments packets, we might still see fragments
+ * inside ICMP packets though. */
+ if (iph->frag_off & htons(IP_OFFSET))
+ return -NF_DROP;
-int nat_module_is_loaded = 0;
-static u_int32_t ipv4_get_features(const struct nf_conntrack_tuple *tuple)
-{
- if (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);
-}
-
-static unsigned int ipv4_conntrack_help(unsigned int hooknum,
- struct sk_buff **pskb,
- const struct net_device *in,
- const struct net_device *out,
- int (*okfn)(struct sk_buff *))
-{
struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
+ const struct nf_conn_help *help;
+ const struct nf_conntrack_helper *helper;
+ unsigned int ret;
/* This is where we call the helper: as the packet goes out. */
- ct = nf_ct_get(*pskb, &ctinfo);
- if (ct && ct->helper) {
- unsigned int ret;
- ret = ct->helper->help(pskb,
- (*pskb)->nh.raw - (*pskb)->data
- + (*pskb)->nh.iph->ihl*4,
- ct, ctinfo);
- if (ret != NF_ACCEPT)
- return ret;
+ ct = nf_ct_get(skb, &ctinfo);
+ if (!ct || ctinfo == IP_CT_RELATED + IP_CT_IS_REPLY)
+ goto out;
+
+ help = nfct_help(ct);
+ if (!help)
+ goto out;
+
+ /* rcu_read_lock()ed by nf_hook_slow */
+ helper = rcu_dereference(help->helper);
+ if (!helper)
+ goto out;
+
+ ret = helper->help(skb, skb_network_offset(skb) + ip_hdrlen(skb),
+ ct, ctinfo);
+ if (ret != NF_ACCEPT)
+ return ret;
+
+ if (test_bit(IPS_SEQ_ADJUST_BIT, &ct->status)) {
+ typeof(nf_nat_seq_adjust_hook) seq_adjust;
+
+ seq_adjust = rcu_dereference(nf_nat_seq_adjust_hook);
+ if (!seq_adjust || !seq_adjust(skb, ct, ctinfo))
+ return NF_DROP;
}
- return NF_ACCEPT;
+out:
+ /* We've seen it coming out the other side: confirm it */
+ return nf_conntrack_confirm(skb);
}
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 ((*pskb)->nh.iph->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(dev_net(in), PF_INET, hooknum, skb);
}
static unsigned int ipv4_conntrack_local(unsigned int hooknum,
- struct sk_buff **pskb,
- const struct net_device *in,
- const struct net_device *out,
- int (*okfn)(struct sk_buff *))
+ 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)
- || (*pskb)->nh.iph->ihl * 4 < 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(dev_net(out), PF_INET, hooknum, skb);
}
/* Connection tracking may drop packets, but never alters them, so
make it the first hook. */
-static struct nf_hook_ops ipv4_conntrack_defrag_ops = {
- .hook = ipv4_conntrack_defrag,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_IP_PRE_ROUTING,
- .priority = NF_IP_PRI_CONNTRACK_DEFRAG,
-};
-
-static struct nf_hook_ops ipv4_conntrack_in_ops = {
- .hook = ipv4_conntrack_in,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_IP_PRE_ROUTING,
- .priority = NF_IP_PRI_CONNTRACK,
-};
-
-static struct nf_hook_ops ipv4_conntrack_defrag_local_out_ops = {
- .hook = ipv4_conntrack_defrag,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_IP_LOCAL_OUT,
- .priority = NF_IP_PRI_CONNTRACK_DEFRAG,
-};
-
-static struct nf_hook_ops ipv4_conntrack_local_out_ops = {
- .hook = ipv4_conntrack_local,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_IP_LOCAL_OUT,
- .priority = NF_IP_PRI_CONNTRACK,
-};
-
-/* helpers */
-static struct nf_hook_ops ipv4_conntrack_helper_out_ops = {
- .hook = ipv4_conntrack_help,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_IP_POST_ROUTING,
- .priority = NF_IP_PRI_CONNTRACK_HELPER,
-};
-
-static struct nf_hook_ops ipv4_conntrack_helper_in_ops = {
- .hook = ipv4_conntrack_help,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_IP_LOCAL_IN,
- .priority = NF_IP_PRI_CONNTRACK_HELPER,
-};
-
-
-/* Refragmenter; last chance. */
-static struct nf_hook_ops ipv4_conntrack_out_ops = {
- .hook = ipv4_confirm,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_IP_POST_ROUTING,
- .priority = NF_IP_PRI_CONNTRACK_CONFIRM,
-};
-
-static struct nf_hook_ops ipv4_conntrack_local_in_ops = {
- .hook = ipv4_confirm,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_IP_LOCAL_IN,
- .priority = NF_IP_PRI_CONNTRACK_CONFIRM,
+static struct nf_hook_ops ipv4_conntrack_ops[] __read_mostly = {
+ {
+ .hook = ipv4_conntrack_defrag,
+ .owner = THIS_MODULE,
+ .pf = PF_INET,
+ .hooknum = NF_INET_PRE_ROUTING,
+ .priority = NF_IP_PRI_CONNTRACK_DEFRAG,
+ },
+ {
+ .hook = ipv4_conntrack_in,
+ .owner = THIS_MODULE,
+ .pf = PF_INET,
+ .hooknum = NF_INET_PRE_ROUTING,
+ .priority = NF_IP_PRI_CONNTRACK,
+ },
+ {
+ .hook = ipv4_conntrack_defrag,
+ .owner = THIS_MODULE,
+ .pf = PF_INET,
+ .hooknum = NF_INET_LOCAL_OUT,
+ .priority = NF_IP_PRI_CONNTRACK_DEFRAG,
+ },
+ {
+ .hook = ipv4_conntrack_local,
+ .owner = THIS_MODULE,
+ .pf = PF_INET,
+ .hooknum = NF_INET_LOCAL_OUT,
+ .priority = NF_IP_PRI_CONNTRACK,
+ },
+ {
+ .hook = ipv4_confirm,
+ .owner = THIS_MODULE,
+ .pf = PF_INET,
+ .hooknum = NF_INET_POST_ROUTING,
+ .priority = NF_IP_PRI_CONNTRACK_CONFIRM,
+ },
+ {
+ .hook = ipv4_confirm,
+ .owner = THIS_MODULE,
+ .pf = PF_INET,
+ .hooknum = NF_INET_LOCAL_IN,
+ .priority = NF_IP_PRI_CONNTRACK_CONFIRM,
+ },
};
-#ifdef CONFIG_SYSCTL
-/* From nf_conntrack_proto_icmp.c */
-extern unsigned long nf_ct_icmp_timeout;
-static struct ctl_table_header *nf_ct_ipv4_sysctl_header;
+#if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)
+static int log_invalid_proto_min = 0;
+static int log_invalid_proto_max = 255;
-static ctl_table nf_ct_sysctl_table[] = {
+static ctl_table ip_ct_sysctl_table[] = {
{
- .ctl_name = NET_NF_CONNTRACK_ICMP_TIMEOUT,
- .procname = "nf_conntrack_icmp_timeout",
- .data = &nf_ct_icmp_timeout,
- .maxlen = sizeof(unsigned int),
+ .ctl_name = NET_IPV4_NF_CONNTRACK_MAX,
+ .procname = "ip_conntrack_max",
+ .data = &nf_conntrack_max,
+ .maxlen = sizeof(int),
.mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
+ .proc_handler = &proc_dointvec,
},
- { .ctl_name = 0 }
-};
-
-static ctl_table nf_ct_netfilter_table[] = {
{
- .ctl_name = NET_NETFILTER,
- .procname = "netfilter",
- .mode = 0555,
- .child = nf_ct_sysctl_table,
+ .ctl_name = NET_IPV4_NF_CONNTRACK_COUNT,
+ .procname = "ip_conntrack_count",
+ .data = &init_net.ct.count,
+ .maxlen = sizeof(int),
+ .mode = 0444,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_IPV4_NF_CONNTRACK_BUCKETS,
+ .procname = "ip_conntrack_buckets",
+ .data = &nf_conntrack_htable_size,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0444,
+ .proc_handler = &proc_dointvec,
},
- { .ctl_name = 0 }
-};
-
-static ctl_table nf_ct_net_table[] = {
{
- .ctl_name = CTL_NET,
- .procname = "net",
- .mode = 0555,
- .child = nf_ct_netfilter_table,
+ .ctl_name = NET_IPV4_NF_CONNTRACK_CHECKSUM,
+ .procname = "ip_conntrack_checksum",
+ .data = &init_net.ct.sysctl_checksum,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_IPV4_NF_CONNTRACK_LOG_INVALID,
+ .procname = "ip_conntrack_log_invalid",
+ .data = &init_net.ct.sysctl_log_invalid,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &log_invalid_proto_min,
+ .extra2 = &log_invalid_proto_max,
},
- { .ctl_name = 0 }
+ {
+ .ctl_name = 0
+ }
};
-#endif
+#endif /* CONFIG_SYSCTL && CONFIG_NF_CONNTRACK_PROC_COMPAT */
/* Fast function for those who don't want to parse /proc (and I don't
blame them). */
static int
getorigdst(struct sock *sk, int optval, void __user *user, int *len)
{
- struct inet_sock *inet = inet_sk(sk);
- struct nf_conntrack_tuple_hash *h;
+ const struct inet_sock *inet = inet_sk(sk);
+ const struct nf_conntrack_tuple_hash *h;
struct nf_conntrack_tuple tuple;
-
- NF_CT_TUPLE_U_BLANK(&tuple);
+
+ memset(&tuple, 0, sizeof(tuple));
tuple.src.u3.ip = inet->rcv_saddr;
tuple.src.u.tcp.port = inet->sport;
tuple.dst.u3.ip = inet->daddr;
/* 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(sock_net(sk), &tuple);
if (h) {
struct sockaddr_in sin;
struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h);
.tuple.dst.u.tcp.port;
sin.sin_addr.s_addr = ct->tuplehash[IP_CT_DIR_ORIGINAL]
.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;
}
-#if defined(CONFIG_NF_CT_NETLINK) || \
- defined(CONFIG_NF_CT_NETLINK_MODULE)
+#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 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),
- &tuple->src.u3.ip);
- NFA_PUT(skb, CTA_IP_V4_DST, sizeof(u_int32_t),
- &tuple->dst.u3.ip);
+ NLA_PUT_BE32(skb, CTA_IP_V4_SRC, tuple->src.u3.ip);
+ NLA_PUT_BE32(skb, CTA_IP_V4_DST, 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])
- return -EINVAL;
-
- if (nfattr_bad_size(tb, CTA_IP_MAX, cta_min_ip))
+ if (!tb[CTA_IP_V4_SRC] || !tb[CTA_IP_V4_DST])
return -EINVAL;
- t->src.u3.ip =
- *(u_int32_t *)NFA_DATA(tb[CTA_IP_V4_SRC-1]);
- t->dst.u3.ip =
- *(u_int32_t *)NFA_DATA(tb[CTA_IP_V4_DST-1]);
+ t->src.u3.ip = nla_get_be32(tb[CTA_IP_V4_SRC]);
+ t->dst.u3.ip = nla_get_be32(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,
-#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,
+ .get_l4proto = ipv4_get_l4proto,
+#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
+ .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,
+ .ctl_table = ip_ct_sysctl_table,
#endif
.me = THIS_MODULE,
};
-extern struct nf_conntrack_protocol nf_conntrack_protocol_tcp4;
-extern struct nf_conntrack_protocol nf_conntrack_protocol_udp4;
-extern struct nf_conntrack_protocol nf_conntrack_protocol_icmp;
-static int init_or_cleanup(int init)
+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");
+
+static int __init nf_conntrack_l3proto_ipv4_init(void)
{
int ret = 0;
- if (!init) goto cleanup;
+ need_conntrack();
ret = nf_register_sockopt(&so_getorigdst);
if (ret < 0) {
printk(KERN_ERR "Unable to register netfilter socket option\n");
- goto cleanup_nothing;
+ return ret;
}
- ret = nf_conntrack_protocol_register(&nf_conntrack_protocol_tcp4);
+ ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_tcp4);
if (ret < 0) {
printk("nf_conntrack_ipv4: can't register tcp.\n");
goto cleanup_sockopt;
}
- ret = nf_conntrack_protocol_register(&nf_conntrack_protocol_udp4);
+ ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_udp4);
if (ret < 0) {
printk("nf_conntrack_ipv4: can't register udp.\n");
goto cleanup_tcp;
}
- ret = nf_conntrack_protocol_register(&nf_conntrack_protocol_icmp);
+ ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_icmp);
if (ret < 0) {
printk("nf_conntrack_ipv4: can't register icmp.\n");
goto cleanup_udp;
goto cleanup_icmp;
}
- ret = nf_register_hook(&ipv4_conntrack_defrag_ops);
+ ret = nf_register_hooks(ipv4_conntrack_ops,
+ ARRAY_SIZE(ipv4_conntrack_ops));
if (ret < 0) {
- printk("nf_conntrack_ipv4: can't register pre-routing defrag hook.\n");
+ printk("nf_conntrack_ipv4: can't register hooks.\n");
goto cleanup_ipv4;
}
- ret = nf_register_hook(&ipv4_conntrack_defrag_local_out_ops);
- if (ret < 0) {
- printk("nf_conntrack_ipv4: can't register local_out defrag hook.\n");
- goto cleanup_defragops;
- }
-
- ret = nf_register_hook(&ipv4_conntrack_in_ops);
- if (ret < 0) {
- printk("nf_conntrack_ipv4: can't register pre-routing hook.\n");
- goto cleanup_defraglocalops;
- }
-
- ret = nf_register_hook(&ipv4_conntrack_local_out_ops);
- if (ret < 0) {
- printk("nf_conntrack_ipv4: can't register local out hook.\n");
- goto cleanup_inops;
- }
-
- ret = nf_register_hook(&ipv4_conntrack_helper_in_ops);
- if (ret < 0) {
- printk("nf_conntrack_ipv4: can't register local helper hook.\n");
- goto cleanup_inandlocalops;
- }
-
- ret = nf_register_hook(&ipv4_conntrack_helper_out_ops);
- if (ret < 0) {
- printk("nf_conntrack_ipv4: can't register postrouting helper hook.\n");
- goto cleanup_helperinops;
- }
-
- ret = nf_register_hook(&ipv4_conntrack_out_ops);
- if (ret < 0) {
- printk("nf_conntrack_ipv4: can't register post-routing hook.\n");
- goto cleanup_helperoutops;
- }
-
- ret = nf_register_hook(&ipv4_conntrack_local_in_ops);
- if (ret < 0) {
- printk("nf_conntrack_ipv4: can't register local in hook.\n");
- goto cleanup_inoutandlocalops;
- }
-
-#ifdef CONFIG_SYSCTL
- nf_ct_ipv4_sysctl_header = register_sysctl_table(nf_ct_net_table, 0);
- if (nf_ct_ipv4_sysctl_header == NULL) {
- printk("nf_conntrack: can't register to sysctl.\n");
- ret = -ENOMEM;
- goto cleanup_localinops;
- }
+#if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)
+ ret = nf_conntrack_ipv4_compat_init();
+ if (ret < 0)
+ goto cleanup_hooks;
#endif
-
- /* For use by REJECT target */
- ip_ct_attach = __nf_conntrack_attach;
-
return ret;
-
- cleanup:
- synchronize_net();
- ip_ct_attach = NULL;
-#ifdef CONFIG_SYSCTL
- unregister_sysctl_table(nf_ct_ipv4_sysctl_header);
- cleanup_localinops:
+#if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)
+ cleanup_hooks:
+ nf_unregister_hooks(ipv4_conntrack_ops, ARRAY_SIZE(ipv4_conntrack_ops));
#endif
- nf_unregister_hook(&ipv4_conntrack_local_in_ops);
- cleanup_inoutandlocalops:
- nf_unregister_hook(&ipv4_conntrack_out_ops);
- cleanup_helperoutops:
- nf_unregister_hook(&ipv4_conntrack_helper_out_ops);
- cleanup_helperinops:
- nf_unregister_hook(&ipv4_conntrack_helper_in_ops);
- cleanup_inandlocalops:
- nf_unregister_hook(&ipv4_conntrack_local_out_ops);
- cleanup_inops:
- nf_unregister_hook(&ipv4_conntrack_in_ops);
- cleanup_defraglocalops:
- nf_unregister_hook(&ipv4_conntrack_defrag_local_out_ops);
- cleanup_defragops:
- nf_unregister_hook(&ipv4_conntrack_defrag_ops);
cleanup_ipv4:
nf_conntrack_l3proto_unregister(&nf_conntrack_l3proto_ipv4);
cleanup_icmp:
- nf_conntrack_protocol_unregister(&nf_conntrack_protocol_icmp);
+ nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_icmp);
cleanup_udp:
- nf_conntrack_protocol_unregister(&nf_conntrack_protocol_udp4);
+ nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_udp4);
cleanup_tcp:
- nf_conntrack_protocol_unregister(&nf_conntrack_protocol_tcp4);
+ nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_tcp4);
cleanup_sockopt:
nf_unregister_sockopt(&so_getorigdst);
- cleanup_nothing:
return ret;
}
-MODULE_LICENSE("GPL");
-
-static int __init init(void)
-{
- need_nf_conntrack();
- return init_or_cleanup(1);
-}
-
-static void __exit fini(void)
+static void __exit nf_conntrack_l3proto_ipv4_fini(void)
{
- init_or_cleanup(0);
+ synchronize_net();
+#if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT)
+ nf_conntrack_ipv4_compat_fini();
+#endif
+ nf_unregister_hooks(ipv4_conntrack_ops, ARRAY_SIZE(ipv4_conntrack_ops));
+ nf_conntrack_l3proto_unregister(&nf_conntrack_l3proto_ipv4);
+ nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_icmp);
+ nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_udp4);
+ nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_tcp4);
+ nf_unregister_sockopt(&so_getorigdst);
}
-module_init(init);
-module_exit(fini);
+module_init(nf_conntrack_l3proto_ipv4_init);
+module_exit(nf_conntrack_l3proto_ipv4_fini);
-void need_ip_conntrack(void)
+void need_ipv4_conntrack(void)
{
+ return;
}
-
-EXPORT_SYMBOL(need_ip_conntrack);
-EXPORT_SYMBOL(nf_ct_ipv4_gather_frags);
+EXPORT_SYMBOL_GPL(need_ipv4_conntrack);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff