diff options
Diffstat (limited to 'net/ipv4/netfilter')
-rw-r--r-- | net/ipv4/netfilter/Kconfig | 50 | ||||
-rw-r--r-- | net/ipv4/netfilter/Makefile | 7 | ||||
-rw-r--r-- | net/ipv4/netfilter/iptable_nat.c | 8 | ||||
-rw-r--r-- | net/ipv4/netfilter/nf_nat_l3proto_ipv4.c | 388 | ||||
-rw-r--r-- | net/ipv4/netfilter/nf_nat_masquerade_ipv4.c | 196 | ||||
-rw-r--r-- | net/ipv4/netfilter/nft_chain_nat_ipv4.c | 87 | ||||
-rw-r--r-- | net/ipv4/netfilter/nft_masq_ipv4.c | 90 | ||||
-rw-r--r-- | net/ipv4/netfilter/nft_redir_ipv4.c | 82 |
8 files changed, 6 insertions, 902 deletions
diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig index 80f72cc5ca8d..c98391d49200 100644 --- a/net/ipv4/netfilter/Kconfig +++ b/net/ipv4/netfilter/Kconfig @@ -94,50 +94,7 @@ config NF_REJECT_IPV4 tristate "IPv4 packet rejection" default m if NETFILTER_ADVANCED=n -config NF_NAT_IPV4 - tristate "IPv4 NAT" - depends on NF_CONNTRACK - default m if NETFILTER_ADVANCED=n - select NF_NAT - help - The IPv4 NAT option allows masquerading, port forwarding and other - forms of full Network Address Port Translation. This can be - controlled by iptables or nft. - -if NF_NAT_IPV4 - -config NF_NAT_MASQUERADE_IPV4 - bool - -if NF_TABLES -config NFT_CHAIN_NAT_IPV4 - depends on NF_TABLES_IPV4 - tristate "IPv4 nf_tables nat chain support" - help - This option enables the "nat" chain for IPv4 in nf_tables. This - chain type is used to perform Network Address Translation (NAT) - packet transformations such as the source, destination address and - source and destination ports. - -config NFT_MASQ_IPV4 - tristate "IPv4 masquerading support for nf_tables" - depends on NF_TABLES_IPV4 - depends on NFT_MASQ - select NF_NAT_MASQUERADE_IPV4 - help - This is the expression that provides IPv4 masquerading support for - nf_tables. - -config NFT_REDIR_IPV4 - tristate "IPv4 redirect support for nf_tables" - depends on NF_TABLES_IPV4 - depends on NFT_REDIR - select NF_NAT_REDIRECT - help - This is the expression that provides IPv4 redirect support for - nf_tables. -endif # NF_TABLES - +if NF_NAT config NF_NAT_SNMP_BASIC tristate "Basic SNMP-ALG support" depends on NF_CONNTRACK_SNMP @@ -166,7 +123,7 @@ config NF_NAT_H323 depends on NF_CONNTRACK default NF_CONNTRACK_H323 -endif # NF_NAT_IPV4 +endif # NF_NAT config IP_NF_IPTABLES tristate "IP tables support (required for filtering/masq/NAT)" @@ -263,7 +220,6 @@ config IP_NF_NAT depends on NF_CONNTRACK default m if NETFILTER_ADVANCED=n select NF_NAT - select NF_NAT_IPV4 select NETFILTER_XT_NAT help This enables the `nat' table in iptables. This allows masquerading, @@ -276,7 +232,7 @@ if IP_NF_NAT config IP_NF_TARGET_MASQUERADE tristate "MASQUERADE target support" - select NF_NAT_MASQUERADE_IPV4 + select NF_NAT_MASQUERADE default m if NETFILTER_ADVANCED=n help Masquerading is a special case of NAT: all outgoing connections are diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile index fd7122e0e2c9..e241f5188ebe 100644 --- a/net/ipv4/netfilter/Makefile +++ b/net/ipv4/netfilter/Makefile @@ -3,10 +3,6 @@ # Makefile for the netfilter modules on top of IPv4. # -nf_nat_ipv4-y := nf_nat_l3proto_ipv4.o -nf_nat_ipv4-$(CONFIG_NF_NAT_MASQUERADE_IPV4) += nf_nat_masquerade_ipv4.o -obj-$(CONFIG_NF_NAT_IPV4) += nf_nat_ipv4.o - # defrag obj-$(CONFIG_NF_DEFRAG_IPV4) += nf_defrag_ipv4.o @@ -29,11 +25,8 @@ $(obj)/nf_nat_snmp_basic_main.o: $(obj)/nf_nat_snmp_basic.asn1.h obj-$(CONFIG_NF_NAT_SNMP_BASIC) += nf_nat_snmp_basic.o obj-$(CONFIG_NFT_CHAIN_ROUTE_IPV4) += nft_chain_route_ipv4.o -obj-$(CONFIG_NFT_CHAIN_NAT_IPV4) += nft_chain_nat_ipv4.o obj-$(CONFIG_NFT_REJECT_IPV4) += nft_reject_ipv4.o obj-$(CONFIG_NFT_FIB_IPV4) += nft_fib_ipv4.o -obj-$(CONFIG_NFT_MASQ_IPV4) += nft_masq_ipv4.o -obj-$(CONFIG_NFT_REDIR_IPV4) += nft_redir_ipv4.o obj-$(CONFIG_NFT_DUP_IPV4) += nft_dup_ipv4.o # flow table support diff --git a/net/ipv4/netfilter/iptable_nat.c b/net/ipv4/netfilter/iptable_nat.c index a317445448bf..007da0882412 100644 --- a/net/ipv4/netfilter/iptable_nat.c +++ b/net/ipv4/netfilter/iptable_nat.c @@ -15,8 +15,6 @@ #include <net/ip.h> #include <net/netfilter/nf_nat.h> -#include <net/netfilter/nf_nat_core.h> -#include <net/netfilter/nf_nat_l3proto.h> static int __net_init iptable_nat_table_init(struct net *net); @@ -70,10 +68,10 @@ static int ipt_nat_register_lookups(struct net *net) int i, ret; for (i = 0; i < ARRAY_SIZE(nf_nat_ipv4_ops); i++) { - ret = nf_nat_l3proto_ipv4_register_fn(net, &nf_nat_ipv4_ops[i]); + ret = nf_nat_ipv4_register_fn(net, &nf_nat_ipv4_ops[i]); if (ret) { while (i) - nf_nat_l3proto_ipv4_unregister_fn(net, &nf_nat_ipv4_ops[--i]); + nf_nat_ipv4_unregister_fn(net, &nf_nat_ipv4_ops[--i]); return ret; } @@ -87,7 +85,7 @@ static void ipt_nat_unregister_lookups(struct net *net) int i; for (i = 0; i < ARRAY_SIZE(nf_nat_ipv4_ops); i++) - nf_nat_l3proto_ipv4_unregister_fn(net, &nf_nat_ipv4_ops[i]); + nf_nat_ipv4_unregister_fn(net, &nf_nat_ipv4_ops[i]); } static int __net_init iptable_nat_table_init(struct net *net) diff --git a/net/ipv4/netfilter/nf_nat_l3proto_ipv4.c b/net/ipv4/netfilter/nf_nat_l3proto_ipv4.c deleted file mode 100644 index 4b07eb8a9b18..000000000000 --- a/net/ipv4/netfilter/nf_nat_l3proto_ipv4.c +++ /dev/null @@ -1,388 +0,0 @@ -/* - * (C) 1999-2001 Paul `Rusty' Russell - * (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org> - * (C) 2011 Patrick McHardy <kaber@trash.net> - * - * 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. - */ - -#include <linux/types.h> -#include <linux/module.h> -#include <linux/skbuff.h> -#include <linux/ip.h> -#include <linux/icmp.h> -#include <linux/netfilter.h> -#include <linux/netfilter_ipv4.h> -#include <net/secure_seq.h> -#include <net/checksum.h> -#include <net/route.h> -#include <net/ip.h> - -#include <net/netfilter/nf_conntrack_core.h> -#include <net/netfilter/nf_conntrack.h> -#include <net/netfilter/nf_nat_core.h> -#include <net/netfilter/nf_nat_l3proto.h> -#include <net/netfilter/nf_nat_l4proto.h> - -static const struct nf_nat_l3proto nf_nat_l3proto_ipv4; - -#ifdef CONFIG_XFRM -static void nf_nat_ipv4_decode_session(struct sk_buff *skb, - const struct nf_conn *ct, - enum ip_conntrack_dir dir, - unsigned long statusbit, - struct flowi *fl) -{ - const struct nf_conntrack_tuple *t = &ct->tuplehash[dir].tuple; - struct flowi4 *fl4 = &fl->u.ip4; - - if (ct->status & statusbit) { - fl4->daddr = t->dst.u3.ip; - if (t->dst.protonum == IPPROTO_TCP || - t->dst.protonum == IPPROTO_UDP || - t->dst.protonum == IPPROTO_UDPLITE || - t->dst.protonum == IPPROTO_DCCP || - t->dst.protonum == IPPROTO_SCTP) - fl4->fl4_dport = t->dst.u.all; - } - - statusbit ^= IPS_NAT_MASK; - - if (ct->status & statusbit) { - fl4->saddr = t->src.u3.ip; - if (t->dst.protonum == IPPROTO_TCP || - t->dst.protonum == IPPROTO_UDP || - t->dst.protonum == IPPROTO_UDPLITE || - t->dst.protonum == IPPROTO_DCCP || - t->dst.protonum == IPPROTO_SCTP) - fl4->fl4_sport = t->src.u.all; - } -} -#endif /* CONFIG_XFRM */ - -static bool nf_nat_ipv4_manip_pkt(struct sk_buff *skb, - unsigned int iphdroff, - const struct nf_conntrack_tuple *target, - enum nf_nat_manip_type maniptype) -{ - struct iphdr *iph; - unsigned int hdroff; - - if (!skb_make_writable(skb, iphdroff + sizeof(*iph))) - return false; - - iph = (void *)skb->data + iphdroff; - hdroff = iphdroff + iph->ihl * 4; - - if (!nf_nat_l4proto_manip_pkt(skb, &nf_nat_l3proto_ipv4, iphdroff, - hdroff, target, maniptype)) - return false; - iph = (void *)skb->data + iphdroff; - - if (maniptype == NF_NAT_MANIP_SRC) { - csum_replace4(&iph->check, iph->saddr, target->src.u3.ip); - iph->saddr = target->src.u3.ip; - } else { - csum_replace4(&iph->check, iph->daddr, target->dst.u3.ip); - iph->daddr = target->dst.u3.ip; - } - return true; -} - -static void nf_nat_ipv4_csum_update(struct sk_buff *skb, - unsigned int iphdroff, __sum16 *check, - const struct nf_conntrack_tuple *t, - enum nf_nat_manip_type maniptype) -{ - struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff); - __be32 oldip, newip; - - if (maniptype == NF_NAT_MANIP_SRC) { - oldip = iph->saddr; - newip = t->src.u3.ip; - } else { - oldip = iph->daddr; - newip = t->dst.u3.ip; - } - inet_proto_csum_replace4(check, skb, oldip, newip, true); -} - -static void nf_nat_ipv4_csum_recalc(struct sk_buff *skb, - u8 proto, void *data, __sum16 *check, - int datalen, int oldlen) -{ - if (skb->ip_summed != CHECKSUM_PARTIAL) { - const struct iphdr *iph = ip_hdr(skb); - - skb->ip_summed = CHECKSUM_PARTIAL; - skb->csum_start = skb_headroom(skb) + skb_network_offset(skb) + - ip_hdrlen(skb); - skb->csum_offset = (void *)check - data; - *check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, datalen, - proto, 0); - } else - inet_proto_csum_replace2(check, skb, - htons(oldlen), htons(datalen), true); -} - -#if IS_ENABLED(CONFIG_NF_CT_NETLINK) -static int nf_nat_ipv4_nlattr_to_range(struct nlattr *tb[], - struct nf_nat_range2 *range) -{ - if (tb[CTA_NAT_V4_MINIP]) { - range->min_addr.ip = nla_get_be32(tb[CTA_NAT_V4_MINIP]); - range->flags |= NF_NAT_RANGE_MAP_IPS; - } - - if (tb[CTA_NAT_V4_MAXIP]) - range->max_addr.ip = nla_get_be32(tb[CTA_NAT_V4_MAXIP]); - else - range->max_addr.ip = range->min_addr.ip; - - return 0; -} -#endif - -static const struct nf_nat_l3proto nf_nat_l3proto_ipv4 = { - .l3proto = NFPROTO_IPV4, - .manip_pkt = nf_nat_ipv4_manip_pkt, - .csum_update = nf_nat_ipv4_csum_update, - .csum_recalc = nf_nat_ipv4_csum_recalc, -#if IS_ENABLED(CONFIG_NF_CT_NETLINK) - .nlattr_to_range = nf_nat_ipv4_nlattr_to_range, -#endif -#ifdef CONFIG_XFRM - .decode_session = nf_nat_ipv4_decode_session, -#endif -}; - -int nf_nat_icmp_reply_translation(struct sk_buff *skb, - struct nf_conn *ct, - enum ip_conntrack_info ctinfo, - unsigned int hooknum) -{ - struct { - struct icmphdr icmp; - struct iphdr ip; - } *inside; - enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo); - enum nf_nat_manip_type manip = HOOK2MANIP(hooknum); - unsigned int hdrlen = ip_hdrlen(skb); - struct nf_conntrack_tuple target; - unsigned long statusbit; - - WARN_ON(ctinfo != IP_CT_RELATED && ctinfo != IP_CT_RELATED_REPLY); - - if (!skb_make_writable(skb, hdrlen + sizeof(*inside))) - return 0; - if (nf_ip_checksum(skb, hooknum, hdrlen, 0)) - return 0; - - inside = (void *)skb->data + hdrlen; - if (inside->icmp.type == ICMP_REDIRECT) { - if ((ct->status & IPS_NAT_DONE_MASK) != IPS_NAT_DONE_MASK) - return 0; - if (ct->status & IPS_NAT_MASK) - return 0; - } - - if (manip == NF_NAT_MANIP_SRC) - statusbit = IPS_SRC_NAT; - else - statusbit = IPS_DST_NAT; - - /* Invert if this is reply direction */ - if (dir == IP_CT_DIR_REPLY) - statusbit ^= IPS_NAT_MASK; - - if (!(ct->status & statusbit)) - return 1; - - if (!nf_nat_ipv4_manip_pkt(skb, hdrlen + sizeof(inside->icmp), - &ct->tuplehash[!dir].tuple, !manip)) - return 0; - - if (skb->ip_summed != CHECKSUM_PARTIAL) { - /* Reloading "inside" here since manip_pkt may reallocate */ - inside = (void *)skb->data + hdrlen; - inside->icmp.checksum = 0; - inside->icmp.checksum = - csum_fold(skb_checksum(skb, hdrlen, - skb->len - hdrlen, 0)); - } - - /* Change outer to look like the reply to an incoming packet */ - nf_ct_invert_tuple(&target, &ct->tuplehash[!dir].tuple); - target.dst.protonum = IPPROTO_ICMP; - if (!nf_nat_ipv4_manip_pkt(skb, 0, &target, manip)) - return 0; - - return 1; -} -EXPORT_SYMBOL_GPL(nf_nat_icmp_reply_translation); - -static unsigned int -nf_nat_ipv4_fn(void *priv, struct sk_buff *skb, - const struct nf_hook_state *state) -{ - struct nf_conn *ct; - enum ip_conntrack_info ctinfo; - - ct = nf_ct_get(skb, &ctinfo); - if (!ct) - return NF_ACCEPT; - - if (ctinfo == IP_CT_RELATED || ctinfo == IP_CT_RELATED_REPLY) { - if (ip_hdr(skb)->protocol == IPPROTO_ICMP) { - if (!nf_nat_icmp_reply_translation(skb, ct, ctinfo, - state->hook)) - return NF_DROP; - else - return NF_ACCEPT; - } - } - - return nf_nat_inet_fn(priv, skb, state); -} - -static unsigned int -nf_nat_ipv4_in(void *priv, struct sk_buff *skb, - const struct nf_hook_state *state) -{ - unsigned int ret; - __be32 daddr = ip_hdr(skb)->daddr; - - ret = nf_nat_ipv4_fn(priv, skb, state); - if (ret != NF_DROP && ret != NF_STOLEN && - daddr != ip_hdr(skb)->daddr) - skb_dst_drop(skb); - - return ret; -} - -static unsigned int -nf_nat_ipv4_out(void *priv, struct sk_buff *skb, - const struct nf_hook_state *state) -{ -#ifdef CONFIG_XFRM - const struct nf_conn *ct; - enum ip_conntrack_info ctinfo; - int err; -#endif - unsigned int ret; - - ret = nf_nat_ipv4_fn(priv, skb, state); -#ifdef CONFIG_XFRM - if (ret != NF_DROP && ret != NF_STOLEN && - !(IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) && - (ct = nf_ct_get(skb, &ctinfo)) != NULL) { - enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo); - - if ((ct->tuplehash[dir].tuple.src.u3.ip != - ct->tuplehash[!dir].tuple.dst.u3.ip) || - (ct->tuplehash[dir].tuple.dst.protonum != IPPROTO_ICMP && - ct->tuplehash[dir].tuple.src.u.all != - ct->tuplehash[!dir].tuple.dst.u.all)) { - err = nf_xfrm_me_harder(state->net, skb, AF_INET); - if (err < 0) - ret = NF_DROP_ERR(err); - } - } -#endif - return ret; -} - -static unsigned int -nf_nat_ipv4_local_fn(void *priv, struct sk_buff *skb, - const struct nf_hook_state *state) -{ - const struct nf_conn *ct; - enum ip_conntrack_info ctinfo; - unsigned int ret; - int err; - - ret = nf_nat_ipv4_fn(priv, skb, state); - if (ret != NF_DROP && ret != NF_STOLEN && - (ct = nf_ct_get(skb, &ctinfo)) != NULL) { - enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo); - - if (ct->tuplehash[dir].tuple.dst.u3.ip != - ct->tuplehash[!dir].tuple.src.u3.ip) { - err = ip_route_me_harder(state->net, skb, RTN_UNSPEC); - if (err < 0) - ret = NF_DROP_ERR(err); - } -#ifdef CONFIG_XFRM - else if (!(IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) && - ct->tuplehash[dir].tuple.dst.protonum != IPPROTO_ICMP && - ct->tuplehash[dir].tuple.dst.u.all != - ct->tuplehash[!dir].tuple.src.u.all) { - err = nf_xfrm_me_harder(state->net, skb, AF_INET); - if (err < 0) - ret = NF_DROP_ERR(err); - } -#endif - } - return ret; -} - -static const struct nf_hook_ops nf_nat_ipv4_ops[] = { - /* Before packet filtering, change destination */ - { - .hook = nf_nat_ipv4_in, - .pf = NFPROTO_IPV4, - .hooknum = NF_INET_PRE_ROUTING, - .priority = NF_IP_PRI_NAT_DST, - }, - /* After packet filtering, change source */ - { - .hook = nf_nat_ipv4_out, - .pf = NFPROTO_IPV4, - .hooknum = NF_INET_POST_ROUTING, - .priority = NF_IP_PRI_NAT_SRC, - }, - /* Before packet filtering, change destination */ - { - .hook = nf_nat_ipv4_local_fn, - .pf = NFPROTO_IPV4, - .hooknum = NF_INET_LOCAL_OUT, - .priority = NF_IP_PRI_NAT_DST, - }, - /* After packet filtering, change source */ - { - .hook = nf_nat_ipv4_fn, - .pf = NFPROTO_IPV4, - .hooknum = NF_INET_LOCAL_IN, - .priority = NF_IP_PRI_NAT_SRC, - }, -}; - -int nf_nat_l3proto_ipv4_register_fn(struct net *net, const struct nf_hook_ops *ops) -{ - return nf_nat_register_fn(net, ops, nf_nat_ipv4_ops, ARRAY_SIZE(nf_nat_ipv4_ops)); -} -EXPORT_SYMBOL_GPL(nf_nat_l3proto_ipv4_register_fn); - -void nf_nat_l3proto_ipv4_unregister_fn(struct net *net, const struct nf_hook_ops *ops) -{ - nf_nat_unregister_fn(net, ops, ARRAY_SIZE(nf_nat_ipv4_ops)); -} -EXPORT_SYMBOL_GPL(nf_nat_l3proto_ipv4_unregister_fn); - -static int __init nf_nat_l3proto_ipv4_init(void) -{ - return nf_nat_l3proto_register(&nf_nat_l3proto_ipv4); -} - -static void __exit nf_nat_l3proto_ipv4_exit(void) -{ - nf_nat_l3proto_unregister(&nf_nat_l3proto_ipv4); -} - -MODULE_LICENSE("GPL"); -MODULE_ALIAS("nf-nat-" __stringify(AF_INET)); - -module_init(nf_nat_l3proto_ipv4_init); -module_exit(nf_nat_l3proto_ipv4_exit); diff --git a/net/ipv4/netfilter/nf_nat_masquerade_ipv4.c b/net/ipv4/netfilter/nf_nat_masquerade_ipv4.c deleted file mode 100644 index 41327bb99093..000000000000 --- a/net/ipv4/netfilter/nf_nat_masquerade_ipv4.c +++ /dev/null @@ -1,196 +0,0 @@ -/* (C) 1999-2001 Paul `Rusty' Russell - * (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org> - * - * 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. - */ - -#include <linux/types.h> -#include <linux/atomic.h> -#include <linux/inetdevice.h> -#include <linux/ip.h> -#include <linux/timer.h> -#include <linux/netfilter.h> -#include <net/protocol.h> -#include <net/ip.h> -#include <net/checksum.h> -#include <net/route.h> -#include <linux/netfilter_ipv4.h> -#include <linux/netfilter/x_tables.h> -#include <net/netfilter/nf_nat.h> -#include <net/netfilter/ipv4/nf_nat_masquerade.h> - -unsigned int -nf_nat_masquerade_ipv4(struct sk_buff *skb, unsigned int hooknum, - const struct nf_nat_range2 *range, - const struct net_device *out) -{ - struct nf_conn *ct; - struct nf_conn_nat *nat; - enum ip_conntrack_info ctinfo; - struct nf_nat_range2 newrange; - const struct rtable *rt; - __be32 newsrc, nh; - - WARN_ON(hooknum != NF_INET_POST_ROUTING); - - ct = nf_ct_get(skb, &ctinfo); - - WARN_ON(!(ct && (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED || - ctinfo == IP_CT_RELATED_REPLY))); - - /* Source address is 0.0.0.0 - locally generated packet that is - * probably not supposed to be masqueraded. - */ - if (ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip == 0) - return NF_ACCEPT; - - rt = skb_rtable(skb); - nh = rt_nexthop(rt, ip_hdr(skb)->daddr); - newsrc = inet_select_addr(out, nh, RT_SCOPE_UNIVERSE); - if (!newsrc) { - pr_info("%s ate my IP address\n", out->name); - return NF_DROP; - } - - nat = nf_ct_nat_ext_add(ct); - if (nat) - nat->masq_index = out->ifindex; - - /* Transfer from original range. */ - memset(&newrange.min_addr, 0, sizeof(newrange.min_addr)); - memset(&newrange.max_addr, 0, sizeof(newrange.max_addr)); - newrange.flags = range->flags | NF_NAT_RANGE_MAP_IPS; - newrange.min_addr.ip = newsrc; - newrange.max_addr.ip = newsrc; - newrange.min_proto = range->min_proto; - newrange.max_proto = range->max_proto; - - /* Hand modified range to generic setup. */ - return nf_nat_setup_info(ct, &newrange, NF_NAT_MANIP_SRC); -} -EXPORT_SYMBOL_GPL(nf_nat_masquerade_ipv4); - -static int device_cmp(struct nf_conn *i, void *ifindex) -{ - const struct nf_conn_nat *nat = nfct_nat(i); - - if (!nat) - return 0; - if (nf_ct_l3num(i) != NFPROTO_IPV4) - return 0; - return nat->masq_index == (int)(long)ifindex; -} - -static int masq_device_event(struct notifier_block *this, - unsigned long event, - void *ptr) -{ - const struct net_device *dev = netdev_notifier_info_to_dev(ptr); - struct net *net = dev_net(dev); - - if (event == NETDEV_DOWN) { - /* Device was downed. Search entire table for - * conntracks which were associated with that device, - * and forget them. - */ - WARN_ON(dev->ifindex == 0); - - nf_ct_iterate_cleanup_net(net, device_cmp, - (void *)(long)dev->ifindex, 0, 0); - } - - return NOTIFY_DONE; -} - -static int inet_cmp(struct nf_conn *ct, void *ptr) -{ - struct in_ifaddr *ifa = (struct in_ifaddr *)ptr; - struct net_device *dev = ifa->ifa_dev->dev; - struct nf_conntrack_tuple *tuple; - - if (!device_cmp(ct, (void *)(long)dev->ifindex)) - return 0; - - tuple = &ct->tuplehash[IP_CT_DIR_REPLY].tuple; - - return ifa->ifa_address == tuple->dst.u3.ip; -} - -static int masq_inet_event(struct notifier_block *this, - unsigned long event, - void *ptr) -{ - struct in_device *idev = ((struct in_ifaddr *)ptr)->ifa_dev; - struct net *net = dev_net(idev->dev); - - /* The masq_dev_notifier will catch the case of the device going - * down. So if the inetdev is dead and being destroyed we have - * no work to do. Otherwise this is an individual address removal - * and we have to perform the flush. - */ - if (idev->dead) - return NOTIFY_DONE; - - if (event == NETDEV_DOWN) - nf_ct_iterate_cleanup_net(net, inet_cmp, ptr, 0, 0); - - return NOTIFY_DONE; -} - -static struct notifier_block masq_dev_notifier = { - .notifier_call = masq_device_event, -}; - -static struct notifier_block masq_inet_notifier = { - .notifier_call = masq_inet_event, -}; - -static int masq_refcnt; -static DEFINE_MUTEX(masq_mutex); - -int nf_nat_masquerade_ipv4_register_notifier(void) -{ - int ret = 0; - - mutex_lock(&masq_mutex); - /* check if the notifier was already set */ - if (++masq_refcnt > 1) - goto out_unlock; - - /* Register for device down reports */ - ret = register_netdevice_notifier(&masq_dev_notifier); - if (ret) - goto err_dec; - /* Register IP address change reports */ - ret = register_inetaddr_notifier(&masq_inet_notifier); - if (ret) - goto err_unregister; - - mutex_unlock(&masq_mutex); - return ret; - -err_unregister: - unregister_netdevice_notifier(&masq_dev_notifier); -err_dec: - masq_refcnt--; -out_unlock: - mutex_unlock(&masq_mutex); - return ret; -} -EXPORT_SYMBOL_GPL(nf_nat_masquerade_ipv4_register_notifier); - -void nf_nat_masquerade_ipv4_unregister_notifier(void) -{ - mutex_lock(&masq_mutex); - /* check if the notifier still has clients */ - if (--masq_refcnt > 0) - goto out_unlock; - - unregister_netdevice_notifier(&masq_dev_notifier); - unregister_inetaddr_notifier(&masq_inet_notifier); -out_unlock: - mutex_unlock(&masq_mutex); -} -EXPORT_SYMBOL_GPL(nf_nat_masquerade_ipv4_unregister_notifier); diff --git a/net/ipv4/netfilter/nft_chain_nat_ipv4.c b/net/ipv4/netfilter/nft_chain_nat_ipv4.c deleted file mode 100644 index a3c4ea303e3e..000000000000 --- a/net/ipv4/netfilter/nft_chain_nat_ipv4.c +++ /dev/null @@ -1,87 +0,0 @@ -/* - * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net> - * Copyright (c) 2012 Pablo Neira Ayuso <pablo@netfilter.org> - * Copyright (c) 2012 Intel Corporation - * - * 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. - * - * Development of this code funded by Astaro AG (http://www.astaro.com/) - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/list.h> -#include <linux/skbuff.h> -#include <linux/ip.h> -#include <linux/netfilter.h> -#include <linux/netfilter_ipv4.h> -#include <linux/netfilter/nf_tables.h> -#include <net/netfilter/nf_conntrack.h> -#include <net/netfilter/nf_nat.h> -#include <net/netfilter/nf_nat_core.h> -#include <net/netfilter/nf_tables.h> -#include <net/netfilter/nf_tables_ipv4.h> -#include <net/netfilter/nf_nat_l3proto.h> -#include <net/ip.h> - -static unsigned int nft_nat_do_chain(void *priv, - struct sk_buff *skb, - const struct nf_hook_state *state) -{ - struct nft_pktinfo pkt; - - nft_set_pktinfo(&pkt, skb, state); - nft_set_pktinfo_ipv4(&pkt, skb); - - return nft_do_chain(&pkt, priv); -} - -static int nft_nat_ipv4_reg(struct net *net, const struct nf_hook_ops *ops) -{ - return nf_nat_l3proto_ipv4_register_fn(net, ops); -} - -static void nft_nat_ipv4_unreg(struct net *net, const struct nf_hook_ops *ops) -{ - nf_nat_l3proto_ipv4_unregister_fn(net, ops); -} - -static const struct nft_chain_type nft_chain_nat_ipv4 = { - .name = "nat", - .type = NFT_CHAIN_T_NAT, - .family = NFPROTO_IPV4, - .owner = THIS_MODULE, - .hook_mask = (1 << NF_INET_PRE_ROUTING) | - (1 << NF_INET_POST_ROUTING) | - (1 << NF_INET_LOCAL_OUT) | - (1 << NF_INET_LOCAL_IN), - .hooks = { - [NF_INET_PRE_ROUTING] = nft_nat_do_chain, - [NF_INET_POST_ROUTING] = nft_nat_do_chain, - [NF_INET_LOCAL_OUT] = nft_nat_do_chain, - [NF_INET_LOCAL_IN] = nft_nat_do_chain, - }, - .ops_register = nft_nat_ipv4_reg, - .ops_unregister = nft_nat_ipv4_unreg, -}; - -static int __init nft_chain_nat_init(void) -{ - nft_register_chain_type(&nft_chain_nat_ipv4); - - return 0; -} - -static void __exit nft_chain_nat_exit(void) -{ - nft_unregister_chain_type(&nft_chain_nat_ipv4); -} - -module_init(nft_chain_nat_init); -module_exit(nft_chain_nat_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); -MODULE_ALIAS_NFT_CHAIN(AF_INET, "nat"); diff --git a/net/ipv4/netfilter/nft_masq_ipv4.c b/net/ipv4/netfilter/nft_masq_ipv4.c deleted file mode 100644 index 6847de1d1db8..000000000000 --- a/net/ipv4/netfilter/nft_masq_ipv4.c +++ /dev/null @@ -1,90 +0,0 @@ -/* - * Copyright (c) 2014 Arturo Borrero Gonzalez <arturo@debian.org> - * - * 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. - */ - -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/netlink.h> -#include <linux/netfilter.h> -#include <linux/netfilter/nf_tables.h> -#include <net/netfilter/nf_tables.h> -#include <net/netfilter/nft_masq.h> -#include <net/netfilter/ipv4/nf_nat_masquerade.h> - -static void nft_masq_ipv4_eval(const struct nft_expr *expr, - struct nft_regs *regs, - const struct nft_pktinfo *pkt) -{ - struct nft_masq *priv = nft_expr_priv(expr); - struct nf_nat_range2 range; - - memset(&range, 0, sizeof(range)); - range.flags = priv->flags; - if (priv->sreg_proto_min) { - range.min_proto.all = (__force __be16)nft_reg_load16( - ®s->data[priv->sreg_proto_min]); - range.max_proto.all = (__force __be16)nft_reg_load16( - ®s->data[priv->sreg_proto_max]); - } - regs->verdict.code = nf_nat_masquerade_ipv4(pkt->skb, nft_hook(pkt), - &range, nft_out(pkt)); -} - -static void -nft_masq_ipv4_destroy(const struct nft_ctx *ctx, const struct nft_expr *expr) -{ - nf_ct_netns_put(ctx->net, NFPROTO_IPV4); -} - -static struct nft_expr_type nft_masq_ipv4_type; -static const struct nft_expr_ops nft_masq_ipv4_ops = { - .type = &nft_masq_ipv4_type, - .size = NFT_EXPR_SIZE(sizeof(struct nft_masq)), - .eval = nft_masq_ipv4_eval, - .init = nft_masq_init, - .destroy = nft_masq_ipv4_destroy, - .dump = nft_masq_dump, - .validate = nft_masq_validate, -}; - -static struct nft_expr_type nft_masq_ipv4_type __read_mostly = { - .family = NFPROTO_IPV4, - .name = "masq", - .ops = &nft_masq_ipv4_ops, - .policy = nft_masq_policy, - .maxattr = NFTA_MASQ_MAX, - .owner = THIS_MODULE, -}; - -static int __init nft_masq_ipv4_module_init(void) -{ - int ret; - - ret = nft_register_expr(&nft_masq_ipv4_type); - if (ret < 0) - return ret; - - ret = nf_nat_masquerade_ipv4_register_notifier(); - if (ret) - nft_unregister_expr(&nft_masq_ipv4_type); - - return ret; -} - -static void __exit nft_masq_ipv4_module_exit(void) -{ - nft_unregister_expr(&nft_masq_ipv4_type); - nf_nat_masquerade_ipv4_unregister_notifier(); -} - -module_init(nft_masq_ipv4_module_init); -module_exit(nft_masq_ipv4_module_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Arturo Borrero Gonzalez <arturo@debian.org"); -MODULE_ALIAS_NFT_AF_EXPR(AF_INET, "masq"); diff --git a/net/ipv4/netfilter/nft_redir_ipv4.c b/net/ipv4/netfilter/nft_redir_ipv4.c deleted file mode 100644 index 5120be1d3118..000000000000 --- a/net/ipv4/netfilter/nft_redir_ipv4.c +++ /dev/null @@ -1,82 +0,0 @@ -/* - * Copyright (c) 2014 Arturo Borrero Gonzalez <arturo@debian.org> - * - * 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. - */ - -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/netlink.h> -#include <linux/netfilter.h> -#include <linux/netfilter/nf_tables.h> -#include <net/netfilter/nf_tables.h> -#include <net/netfilter/nf_nat.h> -#include <net/netfilter/nf_nat_redirect.h> -#include <net/netfilter/nft_redir.h> - -static void nft_redir_ipv4_eval(const struct nft_expr *expr, - struct nft_regs *regs, - const struct nft_pktinfo *pkt) -{ - struct nft_redir *priv = nft_expr_priv(expr); - struct nf_nat_ipv4_multi_range_compat mr; - - memset(&mr, 0, sizeof(mr)); - if (priv->sreg_proto_min) { - mr.range[0].min.all = (__force __be16)nft_reg_load16( - ®s->data[priv->sreg_proto_min]); - mr.range[0].max.all = (__force __be16)nft_reg_load16( - ®s->data[priv->sreg_proto_max]); - mr.range[0].flags |= NF_NAT_RANGE_PROTO_SPECIFIED; - } - - mr.range[0].flags |= priv->flags; - - regs->verdict.code = nf_nat_redirect_ipv4(pkt->skb, &mr, nft_hook(pkt)); -} - -static void -nft_redir_ipv4_destroy(const struct nft_ctx *ctx, const struct nft_expr *expr) -{ - nf_ct_netns_put(ctx->net, NFPROTO_IPV4); -} - -static struct nft_expr_type nft_redir_ipv4_type; -static const struct nft_expr_ops nft_redir_ipv4_ops = { - .type = &nft_redir_ipv4_type, - .size = NFT_EXPR_SIZE(sizeof(struct nft_redir)), - .eval = nft_redir_ipv4_eval, - .init = nft_redir_init, - .destroy = nft_redir_ipv4_destroy, - .dump = nft_redir_dump, - .validate = nft_redir_validate, -}; - -static struct nft_expr_type nft_redir_ipv4_type __read_mostly = { - .family = NFPROTO_IPV4, - .name = "redir", - .ops = &nft_redir_ipv4_ops, - .policy = nft_redir_policy, - .maxattr = NFTA_REDIR_MAX, - .owner = THIS_MODULE, -}; - -static int __init nft_redir_ipv4_module_init(void) -{ - return nft_register_expr(&nft_redir_ipv4_type); -} - -static void __exit nft_redir_ipv4_module_exit(void) -{ - nft_unregister_expr(&nft_redir_ipv4_type); -} - -module_init(nft_redir_ipv4_module_init); -module_exit(nft_redir_ipv4_module_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Arturo Borrero Gonzalez <arturo@debian.org>"); -MODULE_ALIAS_NFT_AF_EXPR(AF_INET, "redir"); |