af9573be67
This patch enables IPv4 and IPv6 conntrack from the bridge to deal with
local traffic. Hence, packets that are passed up to the local input path
are confirmed later on from the {ipv4,ipv6}_confirm() hooks.
For packets leaving the IP stack (ie. output path), fragmentation occurs
after the inet postrouting hook. Therefore, the bridge local out and
postrouting bridge hooks see fragments with conntrack objects, which is
inconsistent. In this case, we could defragment again from the bridge
output hook, but this is expensive. The recommended filtering spot for
outgoing locally generated traffic leaving through the bridge interface
is to use the classic IPv4/IPv6 output hook, which comes earlier.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
708 lines
17 KiB
C
708 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/types.h>
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#include <linux/netfilter.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/mutex.h>
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#include <linux/vmalloc.h>
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#include <linux/stddef.h>
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#include <linux/err.h>
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#include <linux/percpu.h>
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#include <linux/notifier.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <net/netfilter/nf_conntrack.h>
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#include <net/netfilter/nf_conntrack_l4proto.h>
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#include <net/netfilter/nf_conntrack_core.h>
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#include <net/netfilter/nf_conntrack_bridge.h>
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#include <net/netfilter/nf_log.h>
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#include <linux/ip.h>
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#include <linux/icmp.h>
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#include <linux/sysctl.h>
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#include <net/route.h>
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#include <net/ip.h>
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#include <linux/netfilter_ipv4.h>
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#include <linux/netfilter_ipv6.h>
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#include <linux/netfilter_ipv6/ip6_tables.h>
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#include <net/netfilter/nf_conntrack_helper.h>
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#include <net/netfilter/nf_conntrack_zones.h>
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#include <net/netfilter/nf_conntrack_seqadj.h>
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#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
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#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
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#include <net/netfilter/nf_nat_helper.h>
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#include <net/netfilter/ipv4/nf_defrag_ipv4.h>
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#include <net/netfilter/ipv6/nf_defrag_ipv6.h>
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#include <linux/ipv6.h>
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#include <linux/in6.h>
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#include <net/ipv6.h>
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#include <net/inet_frag.h>
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extern unsigned int nf_conntrack_net_id;
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static DEFINE_MUTEX(nf_ct_proto_mutex);
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#ifdef CONFIG_SYSCTL
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__printf(5, 6)
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void nf_l4proto_log_invalid(const struct sk_buff *skb,
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struct net *net,
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u16 pf, u8 protonum,
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const char *fmt, ...)
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{
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struct va_format vaf;
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va_list args;
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if (net->ct.sysctl_log_invalid != protonum &&
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net->ct.sysctl_log_invalid != IPPROTO_RAW)
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return;
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va_start(args, fmt);
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vaf.fmt = fmt;
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vaf.va = &args;
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nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
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"nf_ct_proto_%d: %pV ", protonum, &vaf);
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va_end(args);
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}
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EXPORT_SYMBOL_GPL(nf_l4proto_log_invalid);
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__printf(3, 4)
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void nf_ct_l4proto_log_invalid(const struct sk_buff *skb,
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const struct nf_conn *ct,
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const char *fmt, ...)
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{
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struct va_format vaf;
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struct net *net;
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va_list args;
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net = nf_ct_net(ct);
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if (likely(net->ct.sysctl_log_invalid == 0))
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return;
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va_start(args, fmt);
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vaf.fmt = fmt;
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vaf.va = &args;
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nf_l4proto_log_invalid(skb, net, nf_ct_l3num(ct),
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nf_ct_protonum(ct), "%pV", &vaf);
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va_end(args);
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}
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EXPORT_SYMBOL_GPL(nf_ct_l4proto_log_invalid);
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#endif
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const struct nf_conntrack_l4proto *nf_ct_l4proto_find(u8 l4proto)
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{
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switch (l4proto) {
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case IPPROTO_UDP: return &nf_conntrack_l4proto_udp;
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case IPPROTO_TCP: return &nf_conntrack_l4proto_tcp;
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case IPPROTO_ICMP: return &nf_conntrack_l4proto_icmp;
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#ifdef CONFIG_NF_CT_PROTO_DCCP
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case IPPROTO_DCCP: return &nf_conntrack_l4proto_dccp;
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#endif
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#ifdef CONFIG_NF_CT_PROTO_SCTP
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case IPPROTO_SCTP: return &nf_conntrack_l4proto_sctp;
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#endif
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#ifdef CONFIG_NF_CT_PROTO_UDPLITE
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case IPPROTO_UDPLITE: return &nf_conntrack_l4proto_udplite;
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#endif
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#ifdef CONFIG_NF_CT_PROTO_GRE
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case IPPROTO_GRE: return &nf_conntrack_l4proto_gre;
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#endif
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#if IS_ENABLED(CONFIG_IPV6)
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case IPPROTO_ICMPV6: return &nf_conntrack_l4proto_icmpv6;
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#endif /* CONFIG_IPV6 */
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}
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return &nf_conntrack_l4proto_generic;
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};
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EXPORT_SYMBOL_GPL(nf_ct_l4proto_find);
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unsigned int nf_confirm(struct sk_buff *skb, unsigned int protoff,
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struct nf_conn *ct, enum ip_conntrack_info ctinfo)
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{
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const struct nf_conn_help *help;
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help = nfct_help(ct);
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if (help) {
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const struct nf_conntrack_helper *helper;
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int ret;
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/* rcu_read_lock()ed by nf_hook_thresh */
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helper = rcu_dereference(help->helper);
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if (helper) {
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ret = helper->help(skb,
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protoff,
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ct, ctinfo);
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if (ret != NF_ACCEPT)
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return ret;
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}
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}
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if (test_bit(IPS_SEQ_ADJUST_BIT, &ct->status) &&
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!nf_is_loopback_packet(skb)) {
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if (!nf_ct_seq_adjust(skb, ct, ctinfo, protoff)) {
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NF_CT_STAT_INC_ATOMIC(nf_ct_net(ct), drop);
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return NF_DROP;
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}
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}
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/* We've seen it coming out the other side: confirm it */
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return nf_conntrack_confirm(skb);
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}
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EXPORT_SYMBOL_GPL(nf_confirm);
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static unsigned int ipv4_confirm(void *priv,
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struct sk_buff *skb,
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const struct nf_hook_state *state)
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{
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enum ip_conntrack_info ctinfo;
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struct nf_conn *ct;
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ct = nf_ct_get(skb, &ctinfo);
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if (!ct || ctinfo == IP_CT_RELATED_REPLY)
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return nf_conntrack_confirm(skb);
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return nf_confirm(skb,
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skb_network_offset(skb) + ip_hdrlen(skb),
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ct, ctinfo);
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}
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static unsigned int ipv4_conntrack_in(void *priv,
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struct sk_buff *skb,
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const struct nf_hook_state *state)
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{
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return nf_conntrack_in(skb, state);
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}
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static unsigned int ipv4_conntrack_local(void *priv,
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struct sk_buff *skb,
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const struct nf_hook_state *state)
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{
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if (ip_is_fragment(ip_hdr(skb))) { /* IP_NODEFRAG setsockopt set */
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enum ip_conntrack_info ctinfo;
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struct nf_conn *tmpl;
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tmpl = nf_ct_get(skb, &ctinfo);
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if (tmpl && nf_ct_is_template(tmpl)) {
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/* when skipping ct, clear templates to avoid fooling
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* later targets/matches
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*/
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skb->_nfct = 0;
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nf_ct_put(tmpl);
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}
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return NF_ACCEPT;
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}
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return nf_conntrack_in(skb, state);
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}
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/* Connection tracking may drop packets, but never alters them, so
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* make it the first hook.
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*/
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static const struct nf_hook_ops ipv4_conntrack_ops[] = {
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{
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.hook = ipv4_conntrack_in,
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.pf = NFPROTO_IPV4,
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.hooknum = NF_INET_PRE_ROUTING,
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.priority = NF_IP_PRI_CONNTRACK,
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},
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{
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.hook = ipv4_conntrack_local,
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.pf = NFPROTO_IPV4,
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.hooknum = NF_INET_LOCAL_OUT,
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.priority = NF_IP_PRI_CONNTRACK,
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},
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{
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.hook = ipv4_confirm,
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.pf = NFPROTO_IPV4,
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.hooknum = NF_INET_POST_ROUTING,
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.priority = NF_IP_PRI_CONNTRACK_CONFIRM,
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},
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{
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.hook = ipv4_confirm,
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.pf = NFPROTO_IPV4,
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.hooknum = NF_INET_LOCAL_IN,
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.priority = NF_IP_PRI_CONNTRACK_CONFIRM,
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},
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};
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/* Fast function for those who don't want to parse /proc (and I don't
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* blame them).
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* Reversing the socket's dst/src point of view gives us the reply
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* mapping.
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*/
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static int
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getorigdst(struct sock *sk, int optval, void __user *user, int *len)
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{
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const struct inet_sock *inet = inet_sk(sk);
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const struct nf_conntrack_tuple_hash *h;
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struct nf_conntrack_tuple tuple;
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memset(&tuple, 0, sizeof(tuple));
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lock_sock(sk);
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tuple.src.u3.ip = inet->inet_rcv_saddr;
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tuple.src.u.tcp.port = inet->inet_sport;
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tuple.dst.u3.ip = inet->inet_daddr;
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tuple.dst.u.tcp.port = inet->inet_dport;
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tuple.src.l3num = PF_INET;
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tuple.dst.protonum = sk->sk_protocol;
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release_sock(sk);
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/* We only do TCP and SCTP at the moment: is there a better way? */
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if (tuple.dst.protonum != IPPROTO_TCP &&
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tuple.dst.protonum != IPPROTO_SCTP) {
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pr_debug("SO_ORIGINAL_DST: Not a TCP/SCTP socket\n");
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return -ENOPROTOOPT;
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}
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if ((unsigned int)*len < sizeof(struct sockaddr_in)) {
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pr_debug("SO_ORIGINAL_DST: len %d not %zu\n",
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*len, sizeof(struct sockaddr_in));
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return -EINVAL;
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}
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h = nf_conntrack_find_get(sock_net(sk), &nf_ct_zone_dflt, &tuple);
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if (h) {
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struct sockaddr_in sin;
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struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h);
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sin.sin_family = AF_INET;
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sin.sin_port = ct->tuplehash[IP_CT_DIR_ORIGINAL]
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.tuple.dst.u.tcp.port;
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sin.sin_addr.s_addr = ct->tuplehash[IP_CT_DIR_ORIGINAL]
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.tuple.dst.u3.ip;
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memset(sin.sin_zero, 0, sizeof(sin.sin_zero));
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pr_debug("SO_ORIGINAL_DST: %pI4 %u\n",
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&sin.sin_addr.s_addr, ntohs(sin.sin_port));
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nf_ct_put(ct);
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if (copy_to_user(user, &sin, sizeof(sin)) != 0)
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return -EFAULT;
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else
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return 0;
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}
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pr_debug("SO_ORIGINAL_DST: Can't find %pI4/%u-%pI4/%u.\n",
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&tuple.src.u3.ip, ntohs(tuple.src.u.tcp.port),
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&tuple.dst.u3.ip, ntohs(tuple.dst.u.tcp.port));
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return -ENOENT;
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}
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static struct nf_sockopt_ops so_getorigdst = {
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.pf = PF_INET,
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.get_optmin = SO_ORIGINAL_DST,
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.get_optmax = SO_ORIGINAL_DST + 1,
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.get = getorigdst,
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.owner = THIS_MODULE,
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};
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#if IS_ENABLED(CONFIG_IPV6)
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static int
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ipv6_getorigdst(struct sock *sk, int optval, void __user *user, int *len)
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{
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struct nf_conntrack_tuple tuple = { .src.l3num = NFPROTO_IPV6 };
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const struct ipv6_pinfo *inet6 = inet6_sk(sk);
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const struct inet_sock *inet = inet_sk(sk);
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const struct nf_conntrack_tuple_hash *h;
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struct sockaddr_in6 sin6;
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struct nf_conn *ct;
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__be32 flow_label;
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int bound_dev_if;
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lock_sock(sk);
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tuple.src.u3.in6 = sk->sk_v6_rcv_saddr;
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tuple.src.u.tcp.port = inet->inet_sport;
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tuple.dst.u3.in6 = sk->sk_v6_daddr;
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tuple.dst.u.tcp.port = inet->inet_dport;
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tuple.dst.protonum = sk->sk_protocol;
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bound_dev_if = sk->sk_bound_dev_if;
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flow_label = inet6->flow_label;
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release_sock(sk);
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if (tuple.dst.protonum != IPPROTO_TCP &&
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tuple.dst.protonum != IPPROTO_SCTP)
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return -ENOPROTOOPT;
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if (*len < 0 || (unsigned int)*len < sizeof(sin6))
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return -EINVAL;
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h = nf_conntrack_find_get(sock_net(sk), &nf_ct_zone_dflt, &tuple);
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if (!h) {
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pr_debug("IP6T_SO_ORIGINAL_DST: Can't find %pI6c/%u-%pI6c/%u.\n",
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&tuple.src.u3.ip6, ntohs(tuple.src.u.tcp.port),
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&tuple.dst.u3.ip6, ntohs(tuple.dst.u.tcp.port));
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return -ENOENT;
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}
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ct = nf_ct_tuplehash_to_ctrack(h);
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sin6.sin6_family = AF_INET6;
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sin6.sin6_port = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u.tcp.port;
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sin6.sin6_flowinfo = flow_label & IPV6_FLOWINFO_MASK;
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memcpy(&sin6.sin6_addr,
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&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u3.in6,
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sizeof(sin6.sin6_addr));
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nf_ct_put(ct);
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sin6.sin6_scope_id = ipv6_iface_scope_id(&sin6.sin6_addr, bound_dev_if);
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return copy_to_user(user, &sin6, sizeof(sin6)) ? -EFAULT : 0;
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}
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static struct nf_sockopt_ops so_getorigdst6 = {
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.pf = NFPROTO_IPV6,
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.get_optmin = IP6T_SO_ORIGINAL_DST,
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.get_optmax = IP6T_SO_ORIGINAL_DST + 1,
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.get = ipv6_getorigdst,
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.owner = THIS_MODULE,
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};
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static unsigned int ipv6_confirm(void *priv,
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struct sk_buff *skb,
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const struct nf_hook_state *state)
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{
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struct nf_conn *ct;
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enum ip_conntrack_info ctinfo;
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unsigned char pnum = ipv6_hdr(skb)->nexthdr;
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__be16 frag_off;
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int protoff;
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ct = nf_ct_get(skb, &ctinfo);
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if (!ct || ctinfo == IP_CT_RELATED_REPLY)
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return nf_conntrack_confirm(skb);
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protoff = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr), &pnum,
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&frag_off);
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if (protoff < 0 || (frag_off & htons(~0x7)) != 0) {
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pr_debug("proto header not found\n");
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return nf_conntrack_confirm(skb);
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}
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return nf_confirm(skb, protoff, ct, ctinfo);
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}
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static unsigned int ipv6_conntrack_in(void *priv,
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struct sk_buff *skb,
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const struct nf_hook_state *state)
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{
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return nf_conntrack_in(skb, state);
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}
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static unsigned int ipv6_conntrack_local(void *priv,
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struct sk_buff *skb,
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const struct nf_hook_state *state)
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{
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return nf_conntrack_in(skb, state);
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}
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static const struct nf_hook_ops ipv6_conntrack_ops[] = {
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{
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.hook = ipv6_conntrack_in,
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.pf = NFPROTO_IPV6,
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.hooknum = NF_INET_PRE_ROUTING,
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.priority = NF_IP6_PRI_CONNTRACK,
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},
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{
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.hook = ipv6_conntrack_local,
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.pf = NFPROTO_IPV6,
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.hooknum = NF_INET_LOCAL_OUT,
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.priority = NF_IP6_PRI_CONNTRACK,
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},
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{
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.hook = ipv6_confirm,
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.pf = NFPROTO_IPV6,
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.hooknum = NF_INET_POST_ROUTING,
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.priority = NF_IP6_PRI_LAST,
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},
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{
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.hook = ipv6_confirm,
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.pf = NFPROTO_IPV6,
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.hooknum = NF_INET_LOCAL_IN,
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.priority = NF_IP6_PRI_LAST - 1,
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},
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};
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#endif
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static int nf_ct_tcp_fixup(struct nf_conn *ct, void *_nfproto)
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{
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u8 nfproto = (unsigned long)_nfproto;
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if (nf_ct_l3num(ct) != nfproto)
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return 0;
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if (nf_ct_protonum(ct) == IPPROTO_TCP &&
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ct->proto.tcp.state == TCP_CONNTRACK_ESTABLISHED) {
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ct->proto.tcp.seen[0].td_maxwin = 0;
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ct->proto.tcp.seen[1].td_maxwin = 0;
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}
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return 0;
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}
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static struct nf_ct_bridge_info *nf_ct_bridge_info;
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static int nf_ct_netns_do_get(struct net *net, u8 nfproto)
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{
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struct nf_conntrack_net *cnet = net_generic(net, nf_conntrack_net_id);
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bool fixup_needed = false, retry = true;
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int err = 0;
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retry:
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mutex_lock(&nf_ct_proto_mutex);
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switch (nfproto) {
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case NFPROTO_IPV4:
|
|
cnet->users4++;
|
|
if (cnet->users4 > 1)
|
|
goto out_unlock;
|
|
err = nf_defrag_ipv4_enable(net);
|
|
if (err) {
|
|
cnet->users4 = 0;
|
|
goto out_unlock;
|
|
}
|
|
|
|
err = nf_register_net_hooks(net, ipv4_conntrack_ops,
|
|
ARRAY_SIZE(ipv4_conntrack_ops));
|
|
if (err)
|
|
cnet->users4 = 0;
|
|
else
|
|
fixup_needed = true;
|
|
break;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
case NFPROTO_IPV6:
|
|
cnet->users6++;
|
|
if (cnet->users6 > 1)
|
|
goto out_unlock;
|
|
err = nf_defrag_ipv6_enable(net);
|
|
if (err < 0) {
|
|
cnet->users6 = 0;
|
|
goto out_unlock;
|
|
}
|
|
|
|
err = nf_register_net_hooks(net, ipv6_conntrack_ops,
|
|
ARRAY_SIZE(ipv6_conntrack_ops));
|
|
if (err)
|
|
cnet->users6 = 0;
|
|
else
|
|
fixup_needed = true;
|
|
break;
|
|
#endif
|
|
case NFPROTO_BRIDGE:
|
|
if (!nf_ct_bridge_info) {
|
|
if (!retry) {
|
|
err = -EPROTO;
|
|
goto out_unlock;
|
|
}
|
|
mutex_unlock(&nf_ct_proto_mutex);
|
|
request_module("nf_conntrack_bridge");
|
|
retry = false;
|
|
goto retry;
|
|
}
|
|
if (!try_module_get(nf_ct_bridge_info->me)) {
|
|
err = -EPROTO;
|
|
goto out_unlock;
|
|
}
|
|
cnet->users_bridge++;
|
|
if (cnet->users_bridge > 1)
|
|
goto out_unlock;
|
|
|
|
err = nf_register_net_hooks(net, nf_ct_bridge_info->ops,
|
|
nf_ct_bridge_info->ops_size);
|
|
if (err)
|
|
cnet->users_bridge = 0;
|
|
else
|
|
fixup_needed = true;
|
|
break;
|
|
default:
|
|
err = -EPROTO;
|
|
break;
|
|
}
|
|
out_unlock:
|
|
mutex_unlock(&nf_ct_proto_mutex);
|
|
|
|
if (fixup_needed)
|
|
nf_ct_iterate_cleanup_net(net, nf_ct_tcp_fixup,
|
|
(void *)(unsigned long)nfproto, 0, 0);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void nf_ct_netns_do_put(struct net *net, u8 nfproto)
|
|
{
|
|
struct nf_conntrack_net *cnet = net_generic(net, nf_conntrack_net_id);
|
|
|
|
mutex_lock(&nf_ct_proto_mutex);
|
|
switch (nfproto) {
|
|
case NFPROTO_IPV4:
|
|
if (cnet->users4 && (--cnet->users4 == 0))
|
|
nf_unregister_net_hooks(net, ipv4_conntrack_ops,
|
|
ARRAY_SIZE(ipv4_conntrack_ops));
|
|
break;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
case NFPROTO_IPV6:
|
|
if (cnet->users6 && (--cnet->users6 == 0))
|
|
nf_unregister_net_hooks(net, ipv6_conntrack_ops,
|
|
ARRAY_SIZE(ipv6_conntrack_ops));
|
|
break;
|
|
#endif
|
|
case NFPROTO_BRIDGE:
|
|
if (!nf_ct_bridge_info)
|
|
break;
|
|
if (cnet->users_bridge && (--cnet->users_bridge == 0))
|
|
nf_unregister_net_hooks(net, nf_ct_bridge_info->ops,
|
|
nf_ct_bridge_info->ops_size);
|
|
|
|
module_put(nf_ct_bridge_info->me);
|
|
break;
|
|
}
|
|
mutex_unlock(&nf_ct_proto_mutex);
|
|
}
|
|
|
|
static int nf_ct_netns_inet_get(struct net *net)
|
|
{
|
|
int err;
|
|
|
|
err = nf_ct_netns_do_get(net, NFPROTO_IPV4);
|
|
if (err < 0)
|
|
goto err1;
|
|
err = nf_ct_netns_do_get(net, NFPROTO_IPV6);
|
|
if (err < 0)
|
|
goto err2;
|
|
|
|
return err;
|
|
err2:
|
|
nf_ct_netns_put(net, NFPROTO_IPV4);
|
|
err1:
|
|
return err;
|
|
}
|
|
|
|
int nf_ct_netns_get(struct net *net, u8 nfproto)
|
|
{
|
|
int err;
|
|
|
|
switch (nfproto) {
|
|
case NFPROTO_INET:
|
|
err = nf_ct_netns_inet_get(net);
|
|
break;
|
|
case NFPROTO_BRIDGE:
|
|
err = nf_ct_netns_do_get(net, NFPROTO_BRIDGE);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = nf_ct_netns_inet_get(net);
|
|
if (err < 0) {
|
|
nf_ct_netns_put(net, NFPROTO_BRIDGE);
|
|
return err;
|
|
}
|
|
break;
|
|
default:
|
|
err = nf_ct_netns_do_get(net, nfproto);
|
|
break;
|
|
}
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nf_ct_netns_get);
|
|
|
|
void nf_ct_netns_put(struct net *net, uint8_t nfproto)
|
|
{
|
|
switch (nfproto) {
|
|
case NFPROTO_BRIDGE:
|
|
nf_ct_netns_do_put(net, NFPROTO_BRIDGE);
|
|
/* fall through */
|
|
case NFPROTO_INET:
|
|
nf_ct_netns_do_put(net, NFPROTO_IPV4);
|
|
nf_ct_netns_do_put(net, NFPROTO_IPV6);
|
|
break;
|
|
default:
|
|
nf_ct_netns_do_put(net, nfproto);
|
|
break;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(nf_ct_netns_put);
|
|
|
|
void nf_ct_bridge_register(struct nf_ct_bridge_info *info)
|
|
{
|
|
WARN_ON(nf_ct_bridge_info);
|
|
mutex_lock(&nf_ct_proto_mutex);
|
|
nf_ct_bridge_info = info;
|
|
mutex_unlock(&nf_ct_proto_mutex);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nf_ct_bridge_register);
|
|
|
|
void nf_ct_bridge_unregister(struct nf_ct_bridge_info *info)
|
|
{
|
|
WARN_ON(!nf_ct_bridge_info);
|
|
mutex_lock(&nf_ct_proto_mutex);
|
|
nf_ct_bridge_info = NULL;
|
|
mutex_unlock(&nf_ct_proto_mutex);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nf_ct_bridge_unregister);
|
|
|
|
int nf_conntrack_proto_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = nf_register_sockopt(&so_getorigdst);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
ret = nf_register_sockopt(&so_getorigdst6);
|
|
if (ret < 0)
|
|
goto cleanup_sockopt;
|
|
#endif
|
|
|
|
return ret;
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
cleanup_sockopt:
|
|
nf_unregister_sockopt(&so_getorigdst6);
|
|
#endif
|
|
return ret;
|
|
}
|
|
|
|
void nf_conntrack_proto_fini(void)
|
|
{
|
|
nf_unregister_sockopt(&so_getorigdst);
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
nf_unregister_sockopt(&so_getorigdst6);
|
|
#endif
|
|
}
|
|
|
|
void nf_conntrack_proto_pernet_init(struct net *net)
|
|
{
|
|
nf_conntrack_generic_init_net(net);
|
|
nf_conntrack_udp_init_net(net);
|
|
nf_conntrack_tcp_init_net(net);
|
|
nf_conntrack_icmp_init_net(net);
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
nf_conntrack_icmpv6_init_net(net);
|
|
#endif
|
|
#ifdef CONFIG_NF_CT_PROTO_DCCP
|
|
nf_conntrack_dccp_init_net(net);
|
|
#endif
|
|
#ifdef CONFIG_NF_CT_PROTO_SCTP
|
|
nf_conntrack_sctp_init_net(net);
|
|
#endif
|
|
#ifdef CONFIG_NF_CT_PROTO_GRE
|
|
nf_conntrack_gre_init_net(net);
|
|
#endif
|
|
}
|
|
|
|
void nf_conntrack_proto_pernet_fini(struct net *net)
|
|
{
|
|
#ifdef CONFIG_NF_CT_PROTO_GRE
|
|
nf_ct_gre_keymap_flush(net);
|
|
#endif
|
|
}
|
|
|
|
module_param_call(hashsize, nf_conntrack_set_hashsize, param_get_uint,
|
|
&nf_conntrack_htable_size, 0600);
|
|
|
|
MODULE_ALIAS("ip_conntrack");
|
|
MODULE_ALIAS("nf_conntrack-" __stringify(AF_INET));
|
|
MODULE_ALIAS("nf_conntrack-" __stringify(AF_INET6));
|
|
MODULE_LICENSE("GPL");
|