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Commit c7232c99 authored by Patrick McHardy's avatar Patrick McHardy Committed by Pablo Neira Ayuso
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netfilter: add protocol independent NAT core 

Convert the IPv4 NAT implementation to a protocol independent core and
address family specific modules.
Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
parent 051966c0
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Showing with 1495 additions and 1073 deletions
include/linux/netfilter.h
View file @ c7232c99
...@@ -342,7 +342,7 @@ extern int nf_register_afinfo(const struct nf_afinfo *afinfo); ...@@ -342,7 +342,7 @@ extern int nf_register_afinfo(const struct nf_afinfo *afinfo);
extern void nf_unregister_afinfo(const struct nf_afinfo *afinfo); extern void nf_unregister_afinfo(const struct nf_afinfo *afinfo);
#include <net/flow.h> #include <net/flow.h>
extern void (*ip_nat_decode_session)(struct sk_buff *, struct flowi *); extern void (*nf_nat_decode_session_hook)(struct sk_buff *, struct flowi *);
static inline void static inline void
nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, u_int8_t family) nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, u_int8_t family)
...@@ -350,13 +350,11 @@ nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, u_int8_t family) ...@@ -350,13 +350,11 @@ nf_nat_decode_session(struct sk_buff *skb, struct flowi *fl, u_int8_t family)
#ifdef CONFIG_NF_NAT_NEEDED #ifdef CONFIG_NF_NAT_NEEDED
void (*decodefn)(struct sk_buff *, struct flowi *); void (*decodefn)(struct sk_buff *, struct flowi *);
if (family == AF_INET) {
rcu_read_lock(); rcu_read_lock();
decodefn = rcu_dereference(ip_nat_decode_session); decodefn = rcu_dereference(nf_nat_decode_session_hook);
if (decodefn) if (decodefn)
decodefn(skb, fl); decodefn(skb, fl);
rcu_read_unlock(); rcu_read_unlock();
}
#endif #endif
} }
......
include/linux/netfilter/nf_nat.h
View file @ c7232c99
...@@ -22,4 +22,12 @@ struct nf_nat_ipv4_multi_range_compat { ...@@ -22,4 +22,12 @@ struct nf_nat_ipv4_multi_range_compat {
struct nf_nat_ipv4_range range[1]; struct nf_nat_ipv4_range range[1];
}; };
struct nf_nat_range {
unsigned int flags;
union nf_inet_addr min_addr;
union nf_inet_addr max_addr;
union nf_conntrack_man_proto min_proto;
union nf_conntrack_man_proto max_proto;
};
#endif /* _NETFILTER_NF_NAT_H */ #endif /* _NETFILTER_NF_NAT_H */
include/linux/netfilter/nfnetlink_conntrack.h
View file @ c7232c99
...@@ -142,8 +142,10 @@ enum ctattr_tstamp { ...@@ -142,8 +142,10 @@ enum ctattr_tstamp {
enum ctattr_nat { enum ctattr_nat {
CTA_NAT_UNSPEC, CTA_NAT_UNSPEC,
CTA_NAT_MINIP, CTA_NAT_V4_MINIP,
CTA_NAT_MAXIP, #define CTA_NAT_MINIP CTA_NAT_V4_MINIP
CTA_NAT_V4_MAXIP,
#define CTA_NAT_MAXIP CTA_NAT_V4_MAXIP
CTA_NAT_PROTO, CTA_NAT_PROTO,
__CTA_NAT_MAX __CTA_NAT_MAX
}; };
......
include/linux/netfilter_ipv4.h
View file @ c7232c99
...@@ -79,7 +79,6 @@ enum nf_ip_hook_priorities { ...@@ -79,7 +79,6 @@ enum nf_ip_hook_priorities {
#ifdef __KERNEL__ #ifdef __KERNEL__
extern int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type); extern int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type);
extern int ip_xfrm_me_harder(struct sk_buff *skb);
extern __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook, extern __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
unsigned int dataoff, u_int8_t protocol); unsigned int dataoff, u_int8_t protocol);
#endif /*__KERNEL__*/ #endif /*__KERNEL__*/
......
include/net/netfilter/nf_conntrack_expect.h
View file @ c7232c99
...@@ -43,7 +43,7 @@ struct nf_conntrack_expect { ...@@ -43,7 +43,7 @@ struct nf_conntrack_expect {
unsigned int class; unsigned int class;
#ifdef CONFIG_NF_NAT_NEEDED #ifdef CONFIG_NF_NAT_NEEDED
__be32 saved_ip; union nf_inet_addr saved_addr;
/* This is the original per-proto part, used to map the /* This is the original per-proto part, used to map the
* expected connection the way the recipient expects. */ * expected connection the way the recipient expects. */
union nf_conntrack_man_proto saved_proto; union nf_conntrack_man_proto saved_proto;
......
include/net/netfilter/nf_nat.h
View file @ c7232c99
...@@ -50,7 +50,7 @@ struct nf_conn_nat { ...@@ -50,7 +50,7 @@ struct nf_conn_nat {
/* Set up the info structure to map into this range. */ /* Set up the info structure to map into this range. */
extern unsigned int nf_nat_setup_info(struct nf_conn *ct, extern unsigned int nf_nat_setup_info(struct nf_conn *ct,
const struct nf_nat_ipv4_range *range, const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype); enum nf_nat_manip_type maniptype);
/* Is this tuple already taken? (not by us)*/ /* Is this tuple already taken? (not by us)*/
......
include/net/netfilter/nf_nat_core.h
View file @ c7232c99
...@@ -12,10 +12,7 @@ extern unsigned int nf_nat_packet(struct nf_conn *ct, ...@@ -12,10 +12,7 @@ extern unsigned int nf_nat_packet(struct nf_conn *ct,
unsigned int hooknum, unsigned int hooknum,
struct sk_buff *skb); struct sk_buff *skb);
extern int nf_nat_icmp_reply_translation(struct nf_conn *ct, extern int nf_xfrm_me_harder(struct sk_buff *skb, unsigned int family);
enum ip_conntrack_info ctinfo,
unsigned int hooknum,
struct sk_buff *skb);
static inline int nf_nat_initialized(struct nf_conn *ct, static inline int nf_nat_initialized(struct nf_conn *ct,
enum nf_nat_manip_type manip) enum nf_nat_manip_type manip)
......
include/net/netfilter/nf_nat_l3proto.h 0 → 100644
View file @ c7232c99
#ifndef _NF_NAT_L3PROTO_H
#define _NF_NAT_L3PROTO_H
struct nf_nat_l4proto;
struct nf_nat_l3proto {
u8 l3proto;
bool (*in_range)(const struct nf_conntrack_tuple *t,
const struct nf_nat_range *range);
u32 (*secure_port)(const struct nf_conntrack_tuple *t, __be16);
bool (*manip_pkt)(struct sk_buff *skb,
unsigned int iphdroff,
const struct nf_nat_l4proto *l4proto,
const struct nf_conntrack_tuple *target,
enum nf_nat_manip_type maniptype);
void (*csum_update)(struct sk_buff *skb, unsigned int iphdroff,
__sum16 *check,
const struct nf_conntrack_tuple *t,
enum nf_nat_manip_type maniptype);
void (*csum_recalc)(struct sk_buff *skb, u8 proto,
void *data, __sum16 *check,
int datalen, int oldlen);
void (*decode_session)(struct sk_buff *skb,
const struct nf_conn *ct,
enum ip_conntrack_dir dir,
unsigned long statusbit,
struct flowi *fl);
int (*nlattr_to_range)(struct nlattr *tb[],
struct nf_nat_range *range);
};
extern int nf_nat_l3proto_register(const struct nf_nat_l3proto *);
extern void nf_nat_l3proto_unregister(const struct nf_nat_l3proto *);
extern const struct nf_nat_l3proto *__nf_nat_l3proto_find(u8 l3proto);
extern int nf_nat_icmp_reply_translation(struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
unsigned int hooknum);
#endif /* _NF_NAT_L3PROTO_H */
include/net/netfilter/nf_nat_protocol.h → include/net/netfilter/nf_nat_l4proto.h
View file @ c7232c99
/* Header for use in defining a given protocol. */ /* Header for use in defining a given protocol. */
#ifndef _NF_NAT_PROTOCOL_H #ifndef _NF_NAT_L4PROTO_H
#define _NF_NAT_PROTOCOL_H #define _NF_NAT_L4PROTO_H
#include <net/netfilter/nf_nat.h> #include <net/netfilter/nf_nat.h>
#include <linux/netfilter/nfnetlink_conntrack.h> #include <linux/netfilter/nfnetlink_conntrack.h>
struct nf_nat_ipv4_range; struct nf_nat_range;
struct nf_nat_l3proto;
struct nf_nat_protocol { struct nf_nat_l4proto {
/* Protocol number. */ /* Protocol number. */
unsigned int protonum; u8 l4proto;
/* Translate a packet to the target according to manip type. /* Translate a packet to the target according to manip type.
Return true if succeeded. */ * Return true if succeeded.
*/
bool (*manip_pkt)(struct sk_buff *skb, bool (*manip_pkt)(struct sk_buff *skb,
unsigned int iphdroff, const struct nf_nat_l3proto *l3proto,
unsigned int iphdroff, unsigned int hdroff,
const struct nf_conntrack_tuple *tuple, const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype); enum nf_nat_manip_type maniptype);
...@@ -24,44 +27,45 @@ struct nf_nat_protocol { ...@@ -24,44 +27,45 @@ struct nf_nat_protocol {
const union nf_conntrack_man_proto *max); const union nf_conntrack_man_proto *max);
/* Alter the per-proto part of the tuple (depending on /* Alter the per-proto part of the tuple (depending on
maniptype), to give a unique tuple in the given range if * maniptype), to give a unique tuple in the given range if
possible. Per-protocol part of tuple is initialized to the * possible. Per-protocol part of tuple is initialized to the
incoming packet. */ * incoming packet.
void (*unique_tuple)(struct nf_conntrack_tuple *tuple, */
const struct nf_nat_ipv4_range *range, void (*unique_tuple)(const struct nf_nat_l3proto *l3proto,
struct nf_conntrack_tuple *tuple,
const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype, enum nf_nat_manip_type maniptype,
const struct nf_conn *ct); const struct nf_conn *ct);
int (*nlattr_to_range)(struct nlattr *tb[], int (*nlattr_to_range)(struct nlattr *tb[],
struct nf_nat_ipv4_range *range); struct nf_nat_range *range);
}; };
/* Protocol registration. */ /* Protocol registration. */
extern int nf_nat_protocol_register(const struct nf_nat_protocol *proto); extern int nf_nat_l4proto_register(u8 l3proto, const struct nf_nat_l4proto *l4proto);
extern void nf_nat_protocol_unregister(const struct nf_nat_protocol *proto); extern void nf_nat_l4proto_unregister(u8 l3proto, const struct nf_nat_l4proto *l4proto);
/* Built-in protocols. */ extern const struct nf_nat_l4proto *__nf_nat_l4proto_find(u8 l3proto, u8 l4proto);
extern const struct nf_nat_protocol nf_nat_protocol_tcp;
extern const struct nf_nat_protocol nf_nat_protocol_udp;
extern const struct nf_nat_protocol nf_nat_protocol_icmp;
extern const struct nf_nat_protocol nf_nat_unknown_protocol;
extern int init_protocols(void) __init; /* Built-in protocols. */
extern void cleanup_protocols(void); extern const struct nf_nat_l4proto nf_nat_l4proto_tcp;
extern const struct nf_nat_protocol *find_nat_proto(u_int16_t protonum); extern const struct nf_nat_l4proto nf_nat_l4proto_udp;
extern const struct nf_nat_l4proto nf_nat_l4proto_icmp;
extern const struct nf_nat_l4proto nf_nat_l4proto_unknown;
extern bool nf_nat_proto_in_range(const struct nf_conntrack_tuple *tuple, extern bool nf_nat_l4proto_in_range(const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype, enum nf_nat_manip_type maniptype,
const union nf_conntrack_man_proto *min, const union nf_conntrack_man_proto *min,
const union nf_conntrack_man_proto *max); const union nf_conntrack_man_proto *max);
extern void nf_nat_proto_unique_tuple(struct nf_conntrack_tuple *tuple, extern void nf_nat_l4proto_unique_tuple(const struct nf_nat_l3proto *l3proto,
const struct nf_nat_ipv4_range *range, struct nf_conntrack_tuple *tuple,
const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype, enum nf_nat_manip_type maniptype,
const struct nf_conn *ct, const struct nf_conn *ct,
u_int16_t *rover); u16 *rover);
extern int nf_nat_proto_nlattr_to_range(struct nlattr *tb[], extern int nf_nat_l4proto_nlattr_to_range(struct nlattr *tb[],
struct nf_nat_ipv4_range *range); struct nf_nat_range *range);
#endif /*_NF_NAT_PROTO_H*/ #endif /*_NF_NAT_L4PROTO_H*/
include/net/netfilter/nf_nat_rule.h deleted 100644 → 0
View file @ 051966c0
#ifndef _NF_NAT_RULE_H
#define _NF_NAT_RULE_H
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_nat.h>
#include <linux/netfilter_ipv4/ip_tables.h>
extern int nf_nat_rule_init(void) __init;
extern void nf_nat_rule_cleanup(void);
extern int nf_nat_rule_find(struct sk_buff *skb,
unsigned int hooknum,
const struct net_device *in,
const struct net_device *out,
struct nf_conn *ct);
#endif /* _NF_NAT_RULE_H */
include/net/netns/conntrack.h
View file @ c7232c99
...@@ -83,6 +83,10 @@ struct netns_ct { ...@@ -83,6 +83,10 @@ struct netns_ct {
int sysctl_auto_assign_helper; int sysctl_auto_assign_helper;
bool auto_assign_helper_warned; bool auto_assign_helper_warned;
struct nf_ip_net nf_ct_proto; struct nf_ip_net nf_ct_proto;
#ifdef CONFIG_NF_NAT_NEEDED
struct hlist_head *nat_bysource;
unsigned int nat_htable_size;
#endif
#ifdef CONFIG_SYSCTL #ifdef CONFIG_SYSCTL
struct ctl_table_header *sysctl_header; struct ctl_table_header *sysctl_header;
struct ctl_table_header *acct_sysctl_header; struct ctl_table_header *acct_sysctl_header;
......
include/net/netns/ipv4.h
View file @ c7232c99
...@@ -51,8 +51,6 @@ struct netns_ipv4 { ...@@ -51,8 +51,6 @@ struct netns_ipv4 {
struct xt_table *iptable_security; struct xt_table *iptable_security;
#endif #endif
struct xt_table *nat_table; struct xt_table *nat_table;
struct hlist_head *nat_bysource;
unsigned int nat_htable_size;
#endif #endif
int sysctl_icmp_echo_ignore_all; int sysctl_icmp_echo_ignore_all;
......
net/ipv4/netfilter.c
View file @ c7232c99
...@@ -72,43 +72,6 @@ int ip_route_me_harder(struct sk_buff *skb, unsigned int addr_type) ...@@ -72,43 +72,6 @@ int ip_route_me_harder(struct sk_buff *skb, unsigned int addr_type)
} }
EXPORT_SYMBOL(ip_route_me_harder); EXPORT_SYMBOL(ip_route_me_harder);
#ifdef CONFIG_XFRM
int ip_xfrm_me_harder(struct sk_buff *skb)
{
struct flowi fl;
unsigned int hh_len;
struct dst_entry *dst;
if (IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED)
return 0;
if (xfrm_decode_session(skb, &fl, AF_INET) < 0)
return -1;
dst = skb_dst(skb);
if (dst->xfrm)
dst = ((struct xfrm_dst *)dst)->route;
dst_hold(dst);
dst = xfrm_lookup(dev_net(dst->dev), dst, &fl, skb->sk, 0);
if (IS_ERR(dst))
return -1;
skb_dst_drop(skb);
skb_dst_set(skb, dst);
/* Change in oif may mean change in hh_len. */
hh_len = skb_dst(skb)->dev->hard_header_len;
if (skb_headroom(skb) < hh_len &&
pskb_expand_head(skb, hh_len - skb_headroom(skb), 0, GFP_ATOMIC))
return -1;
return 0;
}
EXPORT_SYMBOL(ip_xfrm_me_harder);
#endif
void (*ip_nat_decode_session)(struct sk_buff *, struct flowi *);
EXPORT_SYMBOL(ip_nat_decode_session);
/* /*
* Extra routing may needed on local out, as the QUEUE target never * Extra routing may needed on local out, as the QUEUE target never
* returns control to the table. * returns control to the table.
......
net/ipv4/netfilter/Kconfig
View file @ c7232c99
...@@ -143,25 +143,22 @@ config IP_NF_TARGET_ULOG ...@@ -143,25 +143,22 @@ config IP_NF_TARGET_ULOG
To compile it as a module, choose M here. If unsure, say N. To compile it as a module, choose M here. If unsure, say N.
# NAT + specific targets: nf_conntrack # NAT + specific targets: nf_conntrack
config NF_NAT config NF_NAT_IPV4
tristate "Full NAT" tristate "IPv4 NAT"
depends on NF_CONNTRACK_IPV4 depends on NF_CONNTRACK_IPV4
default m if NETFILTER_ADVANCED=n default m if NETFILTER_ADVANCED=n
select NF_NAT
help help
The Full NAT option allows masquerading, port forwarding and other The IPv4 NAT option allows masquerading, port forwarding and other
forms of full Network Address Port Translation. It is controlled by forms of full Network Address Port Translation. It is controlled by
the `nat' table in iptables: see the man page for iptables(8). the `nat' table in iptables: see the man page for iptables(8).
To compile it as a module, choose M here. If unsure, say N. To compile it as a module, choose M here. If unsure, say N.
config NF_NAT_NEEDED if NF_NAT_IPV4
bool
depends on NF_NAT
default y
config IP_NF_TARGET_MASQUERADE config IP_NF_TARGET_MASQUERADE
tristate "MASQUERADE target support" tristate "MASQUERADE target support"
depends on NF_NAT
default m if NETFILTER_ADVANCED=n default m if NETFILTER_ADVANCED=n
help help
Masquerading is a special case of NAT: all outgoing connections are Masquerading is a special case of NAT: all outgoing connections are
...@@ -174,7 +171,6 @@ config IP_NF_TARGET_MASQUERADE ...@@ -174,7 +171,6 @@ config IP_NF_TARGET_MASQUERADE
config IP_NF_TARGET_NETMAP config IP_NF_TARGET_NETMAP
tristate "NETMAP target support" tristate "NETMAP target support"
depends on NF_NAT
depends on NETFILTER_ADVANCED depends on NETFILTER_ADVANCED
help help
NETMAP is an implementation of static 1:1 NAT mapping of network NETMAP is an implementation of static 1:1 NAT mapping of network
...@@ -185,7 +181,6 @@ config IP_NF_TARGET_NETMAP ...@@ -185,7 +181,6 @@ config IP_NF_TARGET_NETMAP
config IP_NF_TARGET_REDIRECT config IP_NF_TARGET_REDIRECT
tristate "REDIRECT target support" tristate "REDIRECT target support"
depends on NF_NAT
depends on NETFILTER_ADVANCED depends on NETFILTER_ADVANCED
help help
REDIRECT is a special case of NAT: all incoming connections are REDIRECT is a special case of NAT: all incoming connections are
...@@ -195,9 +190,11 @@ config IP_NF_TARGET_REDIRECT ...@@ -195,9 +190,11 @@ config IP_NF_TARGET_REDIRECT
To compile it as a module, choose M here. If unsure, say N. To compile it as a module, choose M here. If unsure, say N.
endif
config NF_NAT_SNMP_BASIC config NF_NAT_SNMP_BASIC
tristate "Basic SNMP-ALG support" tristate "Basic SNMP-ALG support"
depends on NF_CONNTRACK_SNMP && NF_NAT depends on NF_CONNTRACK_SNMP && NF_NAT_IPV4
depends on NETFILTER_ADVANCED depends on NETFILTER_ADVANCED
default NF_NAT && NF_CONNTRACK_SNMP default NF_NAT && NF_CONNTRACK_SNMP
---help--- ---help---
...@@ -219,61 +216,46 @@ config NF_NAT_SNMP_BASIC ...@@ -219,61 +216,46 @@ config NF_NAT_SNMP_BASIC
# <expr> '&&' <expr> (6) # <expr> '&&' <expr> (6)
# #
# (6) Returns the result of min(/expr/, /expr/). # (6) Returns the result of min(/expr/, /expr/).
config NF_NAT_PROTO_DCCP
tristate
depends on NF_NAT && NF_CT_PROTO_DCCP
default NF_NAT && NF_CT_PROTO_DCCP
config NF_NAT_PROTO_GRE config NF_NAT_PROTO_GRE
tristate tristate
depends on NF_NAT && NF_CT_PROTO_GRE depends on NF_NAT_IPV4 && NF_CT_PROTO_GRE
config NF_NAT_PROTO_UDPLITE
tristate
depends on NF_NAT && NF_CT_PROTO_UDPLITE
default NF_NAT && NF_CT_PROTO_UDPLITE
config NF_NAT_PROTO_SCTP
tristate
default NF_NAT && NF_CT_PROTO_SCTP
depends on NF_NAT && NF_CT_PROTO_SCTP
select LIBCRC32C
config NF_NAT_FTP config NF_NAT_FTP
tristate tristate
depends on NF_CONNTRACK && NF_NAT depends on NF_CONNTRACK && NF_NAT_IPV4
default NF_NAT && NF_CONNTRACK_FTP default NF_NAT_IPV4 && NF_CONNTRACK_FTP
config NF_NAT_IRC config NF_NAT_IRC
tristate tristate
depends on NF_CONNTRACK && NF_NAT depends on NF_CONNTRACK && NF_NAT_IPV4
default NF_NAT && NF_CONNTRACK_IRC default NF_NAT_IPV4 && NF_CONNTRACK_IRC
config NF_NAT_TFTP config NF_NAT_TFTP
tristate tristate
depends on NF_CONNTRACK && NF_NAT depends on NF_CONNTRACK && NF_NAT_IPV4
default NF_NAT && NF_CONNTRACK_TFTP default NF_NAT_IPV4 && NF_CONNTRACK_TFTP
config NF_NAT_AMANDA config NF_NAT_AMANDA
tristate tristate
depends on NF_CONNTRACK && NF_NAT depends on NF_CONNTRACK && NF_NAT_IPV4
default NF_NAT && NF_CONNTRACK_AMANDA default NF_NAT_IPV4 && NF_CONNTRACK_AMANDA
config NF_NAT_PPTP config NF_NAT_PPTP
tristate tristate
depends on NF_CONNTRACK && NF_NAT depends on NF_CONNTRACK && NF_NAT_IPV4
default NF_NAT && NF_CONNTRACK_PPTP default NF_NAT_IPV4 && NF_CONNTRACK_PPTP
select NF_NAT_PROTO_GRE select NF_NAT_PROTO_GRE
config NF_NAT_H323 config NF_NAT_H323
tristate tristate
depends on NF_CONNTRACK && NF_NAT depends on NF_CONNTRACK && NF_NAT_IPV4
default NF_NAT && NF_CONNTRACK_H323 default NF_NAT_IPV4 && NF_CONNTRACK_H323
config NF_NAT_SIP config NF_NAT_SIP
tristate tristate
depends on NF_CONNTRACK && NF_NAT depends on NF_CONNTRACK && NF_NAT_IPV4
default NF_NAT && NF_CONNTRACK_SIP default NF_NAT_IPV4 && NF_CONNTRACK_SIP
# mangle + specific targets # mangle + specific targets
config IP_NF_MANGLE config IP_NF_MANGLE
......
net/ipv4/netfilter/Makefile
View file @ c7232c99
...@@ -10,13 +10,11 @@ nf_conntrack_ipv4-objs += nf_conntrack_l3proto_ipv4_compat.o ...@@ -10,13 +10,11 @@ nf_conntrack_ipv4-objs += nf_conntrack_l3proto_ipv4_compat.o
endif endif
endif endif
nf_nat-y := nf_nat_core.o nf_nat_helper.o nf_nat_proto_unknown.o nf_nat_proto_common.o nf_nat_proto_tcp.o nf_nat_proto_udp.o nf_nat_proto_icmp.o
iptable_nat-y := nf_nat_rule.o nf_nat_standalone.o
# connection tracking # connection tracking
obj-$(CONFIG_NF_CONNTRACK_IPV4) += nf_conntrack_ipv4.o obj-$(CONFIG_NF_CONNTRACK_IPV4) += nf_conntrack_ipv4.o
obj-$(CONFIG_NF_NAT) += nf_nat.o nf_nat_ipv4-y := nf_nat_l3proto_ipv4.o nf_nat_proto_icmp.o
obj-$(CONFIG_NF_NAT_IPV4) += nf_nat_ipv4.o
# defrag # defrag
obj-$(CONFIG_NF_DEFRAG_IPV4) += nf_defrag_ipv4.o obj-$(CONFIG_NF_DEFRAG_IPV4) += nf_defrag_ipv4.o
...@@ -32,10 +30,7 @@ obj-$(CONFIG_NF_NAT_SNMP_BASIC) += nf_nat_snmp_basic.o ...@@ -32,10 +30,7 @@ obj-$(CONFIG_NF_NAT_SNMP_BASIC) += nf_nat_snmp_basic.o
obj-$(CONFIG_NF_NAT_TFTP) += nf_nat_tftp.o obj-$(CONFIG_NF_NAT_TFTP) += nf_nat_tftp.o
# NAT protocols (nf_nat) # NAT protocols (nf_nat)
obj-$(CONFIG_NF_NAT_PROTO_DCCP) += nf_nat_proto_dccp.o
obj-$(CONFIG_NF_NAT_PROTO_GRE) += nf_nat_proto_gre.o obj-$(CONFIG_NF_NAT_PROTO_GRE) += nf_nat_proto_gre.o
obj-$(CONFIG_NF_NAT_PROTO_UDPLITE) += nf_nat_proto_udplite.o
obj-$(CONFIG_NF_NAT_PROTO_SCTP) += nf_nat_proto_sctp.o
# generic IP tables # generic IP tables
obj-$(CONFIG_IP_NF_IPTABLES) += ip_tables.o obj-$(CONFIG_IP_NF_IPTABLES) += ip_tables.o
...@@ -43,7 +38,7 @@ obj-$(CONFIG_IP_NF_IPTABLES) += ip_tables.o ...@@ -43,7 +38,7 @@ obj-$(CONFIG_IP_NF_IPTABLES) += ip_tables.o
# the three instances of ip_tables # the three instances of ip_tables
obj-$(CONFIG_IP_NF_FILTER) += iptable_filter.o obj-$(CONFIG_IP_NF_FILTER) += iptable_filter.o
obj-$(CONFIG_IP_NF_MANGLE) += iptable_mangle.o obj-$(CONFIG_IP_NF_MANGLE) += iptable_mangle.o
obj-$(CONFIG_NF_NAT) += iptable_nat.o obj-$(CONFIG_NF_NAT_IPV4) += iptable_nat.o
obj-$(CONFIG_IP_NF_RAW) += iptable_raw.o obj-$(CONFIG_IP_NF_RAW) += iptable_raw.o
obj-$(CONFIG_IP_NF_SECURITY) += iptable_security.o obj-$(CONFIG_IP_NF_SECURITY) += iptable_security.o
......
net/ipv4/netfilter/ipt_MASQUERADE.c
View file @ c7232c99
...@@ -19,9 +19,9 @@ ...@@ -19,9 +19,9 @@
#include <net/ip.h> #include <net/ip.h>
#include <net/checksum.h> #include <net/checksum.h>
#include <net/route.h> #include <net/route.h>
#include <net/netfilter/nf_nat_rule.h>
#include <linux/netfilter_ipv4.h> #include <linux/netfilter_ipv4.h>
#include <linux/netfilter/x_tables.h> #include <linux/netfilter/x_tables.h>
#include <net/netfilter/nf_nat.h>
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>"); MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
...@@ -49,7 +49,7 @@ masquerade_tg(struct sk_buff *skb, const struct xt_action_param *par) ...@@ -49,7 +49,7 @@ masquerade_tg(struct sk_buff *skb, const struct xt_action_param *par)
struct nf_conn *ct; struct nf_conn *ct;
struct nf_conn_nat *nat; struct nf_conn_nat *nat;
enum ip_conntrack_info ctinfo; enum ip_conntrack_info ctinfo;
struct nf_nat_ipv4_range newrange; struct nf_nat_range newrange;
const struct nf_nat_ipv4_multi_range_compat *mr; const struct nf_nat_ipv4_multi_range_compat *mr;
const struct rtable *rt; const struct rtable *rt;
__be32 newsrc, nh; __be32 newsrc, nh;
...@@ -80,10 +80,13 @@ masquerade_tg(struct sk_buff *skb, const struct xt_action_param *par) ...@@ -80,10 +80,13 @@ masquerade_tg(struct sk_buff *skb, const struct xt_action_param *par)
nat->masq_index = par->out->ifindex; nat->masq_index = par->out->ifindex;
/* Transfer from original range. */ /* Transfer from original range. */
newrange = ((struct nf_nat_ipv4_range) memset(&newrange.min_addr, 0, sizeof(newrange.min_addr));
{ mr->range[0].flags | NF_NAT_RANGE_MAP_IPS, memset(&newrange.max_addr, 0, sizeof(newrange.max_addr));
newsrc, newsrc, newrange.flags = mr->range[0].flags | NF_NAT_RANGE_MAP_IPS;
mr->range[0].min, mr->range[0].max }); newrange.min_addr.ip = newsrc;
newrange.max_addr.ip = newsrc;
newrange.min_proto = mr->range[0].min;
newrange.max_proto = mr->range[0].max;
/* Hand modified range to generic setup. */ /* Hand modified range to generic setup. */
return nf_nat_setup_info(ct, &newrange, NF_NAT_MANIP_SRC); return nf_nat_setup_info(ct, &newrange, NF_NAT_MANIP_SRC);
......
net/ipv4/netfilter/ipt_NETMAP.c
View file @ c7232c99
...@@ -16,7 +16,7 @@ ...@@ -16,7 +16,7 @@
#include <linux/netfilter.h> #include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h> #include <linux/netfilter_ipv4.h>
#include <linux/netfilter/x_tables.h> #include <linux/netfilter/x_tables.h>
#include <net/netfilter/nf_nat_rule.h> #include <net/netfilter/nf_nat.h>
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");
MODULE_AUTHOR("Svenning Soerensen <svenning@post5.tele.dk>"); MODULE_AUTHOR("Svenning Soerensen <svenning@post5.tele.dk>");
...@@ -44,7 +44,7 @@ netmap_tg(struct sk_buff *skb, const struct xt_action_param *par) ...@@ -44,7 +44,7 @@ netmap_tg(struct sk_buff *skb, const struct xt_action_param *par)
enum ip_conntrack_info ctinfo; enum ip_conntrack_info ctinfo;
__be32 new_ip, netmask; __be32 new_ip, netmask;
const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo; const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
struct nf_nat_ipv4_range newrange; struct nf_nat_range newrange;
NF_CT_ASSERT(par->hooknum == NF_INET_PRE_ROUTING || NF_CT_ASSERT(par->hooknum == NF_INET_PRE_ROUTING ||
par->hooknum == NF_INET_POST_ROUTING || par->hooknum == NF_INET_POST_ROUTING ||
...@@ -61,10 +61,13 @@ netmap_tg(struct sk_buff *skb, const struct xt_action_param *par) ...@@ -61,10 +61,13 @@ netmap_tg(struct sk_buff *skb, const struct xt_action_param *par)
new_ip = ip_hdr(skb)->saddr & ~netmask; new_ip = ip_hdr(skb)->saddr & ~netmask;
new_ip |= mr->range[0].min_ip & netmask; new_ip |= mr->range[0].min_ip & netmask;
newrange = ((struct nf_nat_ipv4_range) memset(&newrange.min_addr, 0, sizeof(newrange.min_addr));
{ mr->range[0].flags | NF_NAT_RANGE_MAP_IPS, memset(&newrange.max_addr, 0, sizeof(newrange.max_addr));
new_ip, new_ip, newrange.flags = mr->range[0].flags | NF_NAT_RANGE_MAP_IPS;
mr->range[0].min, mr->range[0].max }); newrange.min_addr.ip = new_ip;
newrange.max_addr.ip = new_ip;
newrange.min_proto = mr->range[0].min;
newrange.max_proto = mr->range[0].max;
/* Hand modified range to generic setup. */ /* Hand modified range to generic setup. */
return nf_nat_setup_info(ct, &newrange, HOOK2MANIP(par->hooknum)); return nf_nat_setup_info(ct, &newrange, HOOK2MANIP(par->hooknum));
......
net/ipv4/netfilter/ipt_REDIRECT.c
View file @ c7232c99
...@@ -19,7 +19,7 @@ ...@@ -19,7 +19,7 @@
#include <net/checksum.h> #include <net/checksum.h>
#include <linux/netfilter_ipv4.h> #include <linux/netfilter_ipv4.h>
#include <linux/netfilter/x_tables.h> #include <linux/netfilter/x_tables.h>
#include <net/netfilter/nf_nat_rule.h> #include <net/netfilter/nf_nat.h>
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>"); MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
...@@ -48,7 +48,7 @@ redirect_tg(struct sk_buff *skb, const struct xt_action_param *par) ...@@ -48,7 +48,7 @@ redirect_tg(struct sk_buff *skb, const struct xt_action_param *par)
enum ip_conntrack_info ctinfo; enum ip_conntrack_info ctinfo;
__be32 newdst; __be32 newdst;
const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo; const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
struct nf_nat_ipv4_range newrange; struct nf_nat_range newrange;
NF_CT_ASSERT(par->hooknum == NF_INET_PRE_ROUTING || NF_CT_ASSERT(par->hooknum == NF_INET_PRE_ROUTING ||
par->hooknum == NF_INET_LOCAL_OUT); par->hooknum == NF_INET_LOCAL_OUT);
...@@ -76,10 +76,13 @@ redirect_tg(struct sk_buff *skb, const struct xt_action_param *par) ...@@ -76,10 +76,13 @@ redirect_tg(struct sk_buff *skb, const struct xt_action_param *par)
} }
/* Transfer from original range. */ /* Transfer from original range. */
newrange = ((struct nf_nat_ipv4_range) memset(&newrange.min_addr, 0, sizeof(newrange.min_addr));
{ mr->range[0].flags | NF_NAT_RANGE_MAP_IPS, memset(&newrange.max_addr, 0, sizeof(newrange.max_addr));
newdst, newdst, newrange.flags = mr->range[0].flags | NF_NAT_RANGE_MAP_IPS;
mr->range[0].min, mr->range[0].max }); newrange.min_addr.ip = newdst;
newrange.max_addr.ip = newdst;
newrange.min_proto = mr->range[0].min;
newrange.max_proto = mr->range[0].max;
/* Hand modified range to generic setup. */ /* Hand modified range to generic setup. */
return nf_nat_setup_info(ct, &newrange, NF_NAT_MANIP_DST); return nf_nat_setup_info(ct, &newrange, NF_NAT_MANIP_DST);
......
net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
View file @ c7232c99
...@@ -29,12 +29,6 @@ ...@@ -29,12 +29,6 @@
#include <net/netfilter/ipv4/nf_defrag_ipv4.h> #include <net/netfilter/ipv4/nf_defrag_ipv4.h>
#include <net/netfilter/nf_log.h> #include <net/netfilter/nf_log.h>
int (*nf_nat_seq_adjust_hook)(struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
unsigned int protoff);
EXPORT_SYMBOL_GPL(nf_nat_seq_adjust_hook);
static bool ipv4_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff, static bool ipv4_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff,
struct nf_conntrack_tuple *tuple) struct nf_conntrack_tuple *tuple)
{ {
......
net/ipv4/netfilter/nf_nat_amanda.c
View file @ c7232c99
...@@ -16,7 +16,6 @@ ...@@ -16,7 +16,6 @@
#include <net/netfilter/nf_conntrack_helper.h> #include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h> #include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_nat_helper.h> #include <net/netfilter/nf_nat_helper.h>
#include <net/netfilter/nf_nat_rule.h>
#include <linux/netfilter/nf_conntrack_amanda.h> #include <linux/netfilter/nf_conntrack_amanda.h>
MODULE_AUTHOR("Brian J. Murrell <netfilter@interlinx.bc.ca>"); MODULE_AUTHOR("Brian J. Murrell <netfilter@interlinx.bc.ca>");
......
net/ipv4/netfilter/nf_nat_ftp.c
View file @ c7232c99
...@@ -15,7 +15,6 @@ ...@@ -15,7 +15,6 @@
#include <linux/netfilter_ipv4.h> #include <linux/netfilter_ipv4.h>
#include <net/netfilter/nf_nat.h> #include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_helper.h> #include <net/netfilter/nf_nat_helper.h>
#include <net/netfilter/nf_nat_rule.h>
#include <net/netfilter/nf_conntrack_helper.h> #include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h> #include <net/netfilter/nf_conntrack_expect.h>
#include <linux/netfilter/nf_conntrack_ftp.h> #include <linux/netfilter/nf_conntrack_ftp.h>
......
net/ipv4/netfilter/nf_nat_h323.c
View file @ c7232c99
...@@ -15,7 +15,6 @@ ...@@ -15,7 +15,6 @@
#include <net/netfilter/nf_nat.h> #include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_helper.h> #include <net/netfilter/nf_nat_helper.h>
#include <net/netfilter/nf_nat_rule.h>
#include <net/netfilter/nf_conntrack_helper.h> #include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h> #include <net/netfilter/nf_conntrack_expect.h>
#include <linux/netfilter/nf_conntrack_h323.h> #include <linux/netfilter/nf_conntrack_h323.h>
...@@ -392,7 +391,7 @@ static int nat_h245(struct sk_buff *skb, struct nf_conn *ct, ...@@ -392,7 +391,7 @@ static int nat_h245(struct sk_buff *skb, struct nf_conn *ct,
static void ip_nat_q931_expect(struct nf_conn *new, static void ip_nat_q931_expect(struct nf_conn *new,
struct nf_conntrack_expect *this) struct nf_conntrack_expect *this)
{ {
struct nf_nat_ipv4_range range; struct nf_nat_range range;
if (this->tuple.src.u3.ip != 0) { /* Only accept calls from GK */ if (this->tuple.src.u3.ip != 0) { /* Only accept calls from GK */
nf_nat_follow_master(new, this); nf_nat_follow_master(new, this);
...@@ -404,14 +403,15 @@ static void ip_nat_q931_expect(struct nf_conn *new, ...@@ -404,14 +403,15 @@ static void ip_nat_q931_expect(struct nf_conn *new,
/* Change src to where master sends to */ /* Change src to where master sends to */
range.flags = NF_NAT_RANGE_MAP_IPS; range.flags = NF_NAT_RANGE_MAP_IPS;
range.min_ip = range.max_ip = new->tuplehash[!this->dir].tuple.src.u3.ip; range.min_addr = range.max_addr =
new->tuplehash[!this->dir].tuple.src.u3;
nf_nat_setup_info(new, &range, NF_NAT_MANIP_SRC); nf_nat_setup_info(new, &range, NF_NAT_MANIP_SRC);
/* For DST manip, map port here to where it's expected. */ /* For DST manip, map port here to where it's expected. */
range.flags = (NF_NAT_RANGE_MAP_IPS | NF_NAT_RANGE_PROTO_SPECIFIED); range.flags = (NF_NAT_RANGE_MAP_IPS | NF_NAT_RANGE_PROTO_SPECIFIED);
range.min = range.max = this->saved_proto; range.min_proto = range.max_proto = this->saved_proto;
range.min_ip = range.max_ip = range.min_addr = range.max_addr =
new->master->tuplehash[!this->dir].tuple.src.u3.ip; new->master->tuplehash[!this->dir].tuple.src.u3;
nf_nat_setup_info(new, &range, NF_NAT_MANIP_DST); nf_nat_setup_info(new, &range, NF_NAT_MANIP_DST);
} }
...@@ -490,20 +490,21 @@ static int nat_q931(struct sk_buff *skb, struct nf_conn *ct, ...@@ -490,20 +490,21 @@ static int nat_q931(struct sk_buff *skb, struct nf_conn *ct,
static void ip_nat_callforwarding_expect(struct nf_conn *new, static void ip_nat_callforwarding_expect(struct nf_conn *new,
struct nf_conntrack_expect *this) struct nf_conntrack_expect *this)
{ {
struct nf_nat_ipv4_range range; struct nf_nat_range range;
/* This must be a fresh one. */ /* This must be a fresh one. */
BUG_ON(new->status & IPS_NAT_DONE_MASK); BUG_ON(new->status & IPS_NAT_DONE_MASK);
/* Change src to where master sends to */ /* Change src to where master sends to */
range.flags = NF_NAT_RANGE_MAP_IPS; range.flags = NF_NAT_RANGE_MAP_IPS;
range.min_ip = range.max_ip = new->tuplehash[!this->dir].tuple.src.u3.ip; range.min_addr = range.max_addr =
new->tuplehash[!this->dir].tuple.src.u3;
nf_nat_setup_info(new, &range, NF_NAT_MANIP_SRC); nf_nat_setup_info(new, &range, NF_NAT_MANIP_SRC);
/* For DST manip, map port here to where it's expected. */ /* For DST manip, map port here to where it's expected. */
range.flags = (NF_NAT_RANGE_MAP_IPS | NF_NAT_RANGE_PROTO_SPECIFIED); range.flags = (NF_NAT_RANGE_MAP_IPS | NF_NAT_RANGE_PROTO_SPECIFIED);
range.min = range.max = this->saved_proto; range.min_proto = range.max_proto = this->saved_proto;
range.min_ip = range.max_ip = this->saved_ip; range.min_addr = range.max_addr = this->saved_addr;
nf_nat_setup_info(new, &range, NF_NAT_MANIP_DST); nf_nat_setup_info(new, &range, NF_NAT_MANIP_DST);
} }
...@@ -519,7 +520,7 @@ static int nat_callforwarding(struct sk_buff *skb, struct nf_conn *ct, ...@@ -519,7 +520,7 @@ static int nat_callforwarding(struct sk_buff *skb, struct nf_conn *ct,
u_int16_t nated_port; u_int16_t nated_port;
/* Set expectations for NAT */ /* Set expectations for NAT */
exp->saved_ip = exp->tuple.dst.u3.ip; exp->saved_addr = exp->tuple.dst.u3;
exp->tuple.dst.u3.ip = ct->tuplehash[!dir].tuple.dst.u3.ip; exp->tuple.dst.u3.ip = ct->tuplehash[!dir].tuple.dst.u3.ip;
exp->saved_proto.tcp.port = exp->tuple.dst.u.tcp.port; exp->saved_proto.tcp.port = exp->tuple.dst.u.tcp.port;
exp->expectfn = ip_nat_callforwarding_expect; exp->expectfn = ip_nat_callforwarding_expect;
......
net/ipv4/netfilter/nf_nat_irc.c
View file @ c7232c99
...@@ -17,7 +17,6 @@ ...@@ -17,7 +17,6 @@
#include <net/netfilter/nf_nat.h> #include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_helper.h> #include <net/netfilter/nf_nat_helper.h>
#include <net/netfilter/nf_nat_rule.h>
#include <net/netfilter/nf_conntrack_helper.h> #include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h> #include <net/netfilter/nf_conntrack_expect.h>
#include <linux/netfilter/nf_conntrack_irc.h> #include <linux/netfilter/nf_conntrack_irc.h>
......
net/ipv4/netfilter/nf_nat_l3proto_ipv4.c 0 → 100644
View file @ c7232c99
/*
* (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_in_range(const struct nf_conntrack_tuple *t,
const struct nf_nat_range *range)
{
return ntohl(t->src.u3.ip) >= ntohl(range->min_addr.ip) &&
ntohl(t->src.u3.ip) <= ntohl(range->max_addr.ip);
}
static u32 nf_nat_ipv4_secure_port(const struct nf_conntrack_tuple *t,
__be16 dport)
{
return secure_ipv4_port_ephemeral(t->src.u3.ip, t->dst.u3.ip, dport);
}
static bool nf_nat_ipv4_manip_pkt(struct sk_buff *skb,
unsigned int iphdroff,
const struct nf_nat_l4proto *l4proto,
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 (!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, 1);
}
static void nf_nat_ipv4_csum_recalc(struct sk_buff *skb,
u8 proto, void *data, __sum16 *check,
int datalen, int oldlen)
{
const struct iphdr *iph = ip_hdr(skb);
struct rtable *rt = skb_rtable(skb);
if (skb->ip_summed != CHECKSUM_PARTIAL) {
if (!(rt->rt_flags & RTCF_LOCAL) &&
(!skb->dev || skb->dev->features & NETIF_F_V4_CSUM)) {
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 {
*check = 0;
*check = csum_tcpudp_magic(iph->saddr, iph->daddr,
datalen, proto,
csum_partial(data, datalen,
0));
if (proto == IPPROTO_UDP && !*check)
*check = CSUM_MANGLED_0;
}
} else
inet_proto_csum_replace2(check, skb,
htons(oldlen), htons(datalen), 1);
}
static int nf_nat_ipv4_nlattr_to_range(struct nlattr *tb[],
struct nf_nat_range *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;
}
static const struct nf_nat_l3proto nf_nat_l3proto_ipv4 = {
.l3proto = NFPROTO_IPV4,
.in_range = nf_nat_ipv4_in_range,
.secure_port = nf_nat_ipv4_secure_port,
.manip_pkt = nf_nat_ipv4_manip_pkt,
.csum_update = nf_nat_ipv4_csum_update,
.csum_recalc = nf_nat_ipv4_csum_recalc,
.nlattr_to_range = nf_nat_ipv4_nlattr_to_range,
#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);
const struct nf_nat_l4proto *l4proto;
struct nf_conntrack_tuple target;
unsigned long statusbit;
NF_CT_ASSERT(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;
l4proto = __nf_nat_l4proto_find(NFPROTO_IPV4, inside->ip.protocol);
if (!nf_nat_ipv4_manip_pkt(skb, hdrlen + sizeof(inside->icmp),
l4proto, &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_tuplepr(&target, &ct->tuplehash[!dir].tuple);
l4proto = __nf_nat_l4proto_find(NFPROTO_IPV4, 0);
if (!nf_nat_ipv4_manip_pkt(skb, 0, l4proto, &target, manip))
return 0;
return 1;
}
EXPORT_SYMBOL_GPL(nf_nat_icmp_reply_translation);
static int __init nf_nat_l3proto_ipv4_init(void)
{
int err;
err = nf_nat_l4proto_register(NFPROTO_IPV4, &nf_nat_l4proto_icmp);
if (err < 0)
goto err1;
err = nf_nat_l3proto_register(&nf_nat_l3proto_ipv4);
if (err < 0)
goto err2;
return err;
err2:
nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_icmp);
err1:
return err;
}
static void __exit nf_nat_l3proto_ipv4_exit(void)
{
nf_nat_l3proto_unregister(&nf_nat_l3proto_ipv4);
nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_icmp);
}
MODULE_LICENSE("GPL");
MODULE_ALIAS("nf-nat-" __stringify(AF_INET));
module_init(nf_nat_l3proto_ipv4_init);
module_exit(nf_nat_l3proto_ipv4_exit);
net/ipv4/netfilter/nf_nat_pptp.c
View file @ c7232c99
...@@ -22,7 +22,6 @@ ...@@ -22,7 +22,6 @@
#include <net/netfilter/nf_nat.h> #include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_helper.h> #include <net/netfilter/nf_nat_helper.h>
#include <net/netfilter/nf_nat_rule.h>
#include <net/netfilter/nf_conntrack_helper.h> #include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h> #include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_conntrack_zones.h> #include <net/netfilter/nf_conntrack_zones.h>
...@@ -47,7 +46,7 @@ static void pptp_nat_expected(struct nf_conn *ct, ...@@ -47,7 +46,7 @@ static void pptp_nat_expected(struct nf_conn *ct,
struct nf_conntrack_tuple t; struct nf_conntrack_tuple t;
const struct nf_ct_pptp_master *ct_pptp_info; const struct nf_ct_pptp_master *ct_pptp_info;
const struct nf_nat_pptp *nat_pptp_info; const struct nf_nat_pptp *nat_pptp_info;
struct nf_nat_ipv4_range range; struct nf_nat_range range;
ct_pptp_info = nfct_help_data(master); ct_pptp_info = nfct_help_data(master);
nat_pptp_info = &nfct_nat(master)->help.nat_pptp_info; nat_pptp_info = &nfct_nat(master)->help.nat_pptp_info;
...@@ -89,21 +88,21 @@ static void pptp_nat_expected(struct nf_conn *ct, ...@@ -89,21 +88,21 @@ static void pptp_nat_expected(struct nf_conn *ct,
/* Change src to where master sends to */ /* Change src to where master sends to */
range.flags = NF_NAT_RANGE_MAP_IPS; range.flags = NF_NAT_RANGE_MAP_IPS;
range.min_ip = range.max_ip range.min_addr = range.max_addr
= ct->master->tuplehash[!exp->dir].tuple.dst.u3.ip; = ct->master->tuplehash[!exp->dir].tuple.dst.u3;
if (exp->dir == IP_CT_DIR_ORIGINAL) { if (exp->dir == IP_CT_DIR_ORIGINAL) {
range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED; range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
range.min = range.max = exp->saved_proto; range.min_proto = range.max_proto = exp->saved_proto;
} }
nf_nat_setup_info(ct, &range, NF_NAT_MANIP_SRC); nf_nat_setup_info(ct, &range, NF_NAT_MANIP_SRC);
/* For DST manip, map port here to where it's expected. */ /* For DST manip, map port here to where it's expected. */
range.flags = NF_NAT_RANGE_MAP_IPS; range.flags = NF_NAT_RANGE_MAP_IPS;
range.min_ip = range.max_ip range.min_addr = range.max_addr
= ct->master->tuplehash[!exp->dir].tuple.src.u3.ip; = ct->master->tuplehash[!exp->dir].tuple.src.u3;
if (exp->dir == IP_CT_DIR_REPLY) { if (exp->dir == IP_CT_DIR_REPLY) {
range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED; range.flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
range.min = range.max = exp->saved_proto; range.min_proto = range.max_proto = exp->saved_proto;
} }
nf_nat_setup_info(ct, &range, NF_NAT_MANIP_DST); nf_nat_setup_info(ct, &range, NF_NAT_MANIP_DST);
} }
......
net/ipv4/netfilter/nf_nat_proto_gre.c
View file @ c7232c99
...@@ -28,8 +28,7 @@ ...@@ -28,8 +28,7 @@
#include <linux/ip.h> #include <linux/ip.h>
#include <net/netfilter/nf_nat.h> #include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_rule.h> #include <net/netfilter/nf_nat_l4proto.h>
#include <net/netfilter/nf_nat_protocol.h>
#include <linux/netfilter/nf_conntrack_proto_gre.h> #include <linux/netfilter/nf_conntrack_proto_gre.h>
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");
...@@ -38,8 +37,9 @@ MODULE_DESCRIPTION("Netfilter NAT protocol helper module for GRE"); ...@@ -38,8 +37,9 @@ MODULE_DESCRIPTION("Netfilter NAT protocol helper module for GRE");
/* generate unique tuple ... */ /* generate unique tuple ... */
static void static void
gre_unique_tuple(struct nf_conntrack_tuple *tuple, gre_unique_tuple(const struct nf_nat_l3proto *l3proto,
const struct nf_nat_ipv4_range *range, struct nf_conntrack_tuple *tuple,
const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype, enum nf_nat_manip_type maniptype,
const struct nf_conn *ct) const struct nf_conn *ct)
{ {
...@@ -62,8 +62,8 @@ gre_unique_tuple(struct nf_conntrack_tuple *tuple, ...@@ -62,8 +62,8 @@ gre_unique_tuple(struct nf_conntrack_tuple *tuple,
min = 1; min = 1;
range_size = 0xffff; range_size = 0xffff;
} else { } else {
min = ntohs(range->min.gre.key); min = ntohs(range->min_proto.gre.key);
range_size = ntohs(range->max.gre.key) - min + 1; range_size = ntohs(range->max_proto.gre.key) - min + 1;
} }
pr_debug("min = %u, range_size = %u\n", min, range_size); pr_debug("min = %u, range_size = %u\n", min, range_size);
...@@ -80,14 +80,14 @@ gre_unique_tuple(struct nf_conntrack_tuple *tuple, ...@@ -80,14 +80,14 @@ gre_unique_tuple(struct nf_conntrack_tuple *tuple,
/* manipulate a GRE packet according to maniptype */ /* manipulate a GRE packet according to maniptype */
static bool static bool
gre_manip_pkt(struct sk_buff *skb, unsigned int iphdroff, gre_manip_pkt(struct sk_buff *skb,
const struct nf_nat_l3proto *l3proto,
unsigned int iphdroff, unsigned int hdroff,
const struct nf_conntrack_tuple *tuple, const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype) enum nf_nat_manip_type maniptype)
{ {
const struct gre_hdr *greh; const struct gre_hdr *greh;
struct gre_hdr_pptp *pgreh; struct gre_hdr_pptp *pgreh;
const struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff);
unsigned int hdroff = iphdroff + iph->ihl * 4;
/* pgreh includes two optional 32bit fields which are not required /* pgreh includes two optional 32bit fields which are not required
* to be there. That's where the magic '8' comes from */ * to be there. That's where the magic '8' comes from */
...@@ -117,24 +117,24 @@ gre_manip_pkt(struct sk_buff *skb, unsigned int iphdroff, ...@@ -117,24 +117,24 @@ gre_manip_pkt(struct sk_buff *skb, unsigned int iphdroff,
return true; return true;
} }
static const struct nf_nat_protocol gre = { static const struct nf_nat_l4proto gre = {
.protonum = IPPROTO_GRE, .l4proto = IPPROTO_GRE,
.manip_pkt = gre_manip_pkt, .manip_pkt = gre_manip_pkt,
.in_range = nf_nat_proto_in_range, .in_range = nf_nat_l4proto_in_range,
.unique_tuple = gre_unique_tuple, .unique_tuple = gre_unique_tuple,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.nlattr_to_range = nf_nat_proto_nlattr_to_range, .nlattr_to_range = nf_nat_l4proto_nlattr_to_range,
#endif #endif
}; };
static int __init nf_nat_proto_gre_init(void) static int __init nf_nat_proto_gre_init(void)
{ {
return nf_nat_protocol_register(&gre); return nf_nat_l4proto_register(NFPROTO_IPV4, &gre);
} }
static void __exit nf_nat_proto_gre_fini(void) static void __exit nf_nat_proto_gre_fini(void)
{ {
nf_nat_protocol_unregister(&gre); nf_nat_l4proto_unregister(NFPROTO_IPV4, &gre);
} }
module_init(nf_nat_proto_gre_init); module_init(nf_nat_proto_gre_init);
......
net/ipv4/netfilter/nf_nat_proto_icmp.c
View file @ c7232c99
...@@ -15,8 +15,7 @@ ...@@ -15,8 +15,7 @@
#include <linux/netfilter.h> #include <linux/netfilter.h>
#include <net/netfilter/nf_nat.h> #include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_core.h> #include <net/netfilter/nf_nat_core.h>
#include <net/netfilter/nf_nat_rule.h> #include <net/netfilter/nf_nat_l4proto.h>
#include <net/netfilter/nf_nat_protocol.h>
static bool static bool
icmp_in_range(const struct nf_conntrack_tuple *tuple, icmp_in_range(const struct nf_conntrack_tuple *tuple,
...@@ -29,8 +28,9 @@ icmp_in_range(const struct nf_conntrack_tuple *tuple, ...@@ -29,8 +28,9 @@ icmp_in_range(const struct nf_conntrack_tuple *tuple,
} }
static void static void
icmp_unique_tuple(struct nf_conntrack_tuple *tuple, icmp_unique_tuple(const struct nf_nat_l3proto *l3proto,
const struct nf_nat_ipv4_range *range, struct nf_conntrack_tuple *tuple,
const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype, enum nf_nat_manip_type maniptype,
const struct nf_conn *ct) const struct nf_conn *ct)
{ {
...@@ -38,13 +38,14 @@ icmp_unique_tuple(struct nf_conntrack_tuple *tuple, ...@@ -38,13 +38,14 @@ icmp_unique_tuple(struct nf_conntrack_tuple *tuple,
unsigned int range_size; unsigned int range_size;
unsigned int i; unsigned int i;
range_size = ntohs(range->max.icmp.id) - ntohs(range->min.icmp.id) + 1; range_size = ntohs(range->max_proto.icmp.id) -
ntohs(range->min_proto.icmp.id) + 1;
/* If no range specified... */ /* If no range specified... */
if (!(range->flags & NF_NAT_RANGE_PROTO_SPECIFIED)) if (!(range->flags & NF_NAT_RANGE_PROTO_SPECIFIED))
range_size = 0xFFFF; range_size = 0xFFFF;
for (i = 0; ; ++id) { for (i = 0; ; ++id) {
tuple->src.u.icmp.id = htons(ntohs(range->min.icmp.id) + tuple->src.u.icmp.id = htons(ntohs(range->min_proto.icmp.id) +
(id % range_size)); (id % range_size));
if (++i == range_size || !nf_nat_used_tuple(tuple, ct)) if (++i == range_size || !nf_nat_used_tuple(tuple, ct))
return; return;
...@@ -54,13 +55,12 @@ icmp_unique_tuple(struct nf_conntrack_tuple *tuple, ...@@ -54,13 +55,12 @@ icmp_unique_tuple(struct nf_conntrack_tuple *tuple,
static bool static bool
icmp_manip_pkt(struct sk_buff *skb, icmp_manip_pkt(struct sk_buff *skb,
unsigned int iphdroff, const struct nf_nat_l3proto *l3proto,
unsigned int iphdroff, unsigned int hdroff,
const struct nf_conntrack_tuple *tuple, const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype) enum nf_nat_manip_type maniptype)
{ {
const struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff);
struct icmphdr *hdr; struct icmphdr *hdr;
unsigned int hdroff = iphdroff + iph->ihl*4;
if (!skb_make_writable(skb, hdroff + sizeof(*hdr))) if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
return false; return false;
...@@ -72,12 +72,12 @@ icmp_manip_pkt(struct sk_buff *skb, ...@@ -72,12 +72,12 @@ icmp_manip_pkt(struct sk_buff *skb,
return true; return true;
} }
const struct nf_nat_protocol nf_nat_protocol_icmp = { const struct nf_nat_l4proto nf_nat_l4proto_icmp = {
.protonum = IPPROTO_ICMP, .l4proto = IPPROTO_ICMP,
.manip_pkt = icmp_manip_pkt, .manip_pkt = icmp_manip_pkt,
.in_range = icmp_in_range, .in_range = icmp_in_range,
.unique_tuple = icmp_unique_tuple, .unique_tuple = icmp_unique_tuple,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.nlattr_to_range = nf_nat_proto_nlattr_to_range, .nlattr_to_range = nf_nat_l4proto_nlattr_to_range,
#endif #endif
}; };
net/ipv4/netfilter/nf_nat_rule.c deleted 100644 → 0
View file @ 051966c0
/* (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.
*/
/* Everything about the rules for NAT. */
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/types.h>
#include <linux/ip.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
#include <linux/module.h>
#include <linux/kmod.h>
#include <linux/skbuff.h>
#include <linux/proc_fs.h>
#include <linux/slab.h>
#include <net/checksum.h>
#include <net/route.h>
#include <linux/bitops.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_core.h>
#include <net/netfilter/nf_nat_rule.h>
#define NAT_VALID_HOOKS ((1 << NF_INET_PRE_ROUTING) | \
(1 << NF_INET_POST_ROUTING) | \
(1 << NF_INET_LOCAL_OUT) | \
(1 << NF_INET_LOCAL_IN))
static const struct xt_table nat_table = {
.name = "nat",
.valid_hooks = NAT_VALID_HOOKS,
.me = THIS_MODULE,
.af = NFPROTO_IPV4,
};
/* Source NAT */
static unsigned int
ipt_snat_target(struct sk_buff *skb, const struct xt_action_param *par)
{
struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
NF_CT_ASSERT(par->hooknum == NF_INET_POST_ROUTING ||
par->hooknum == NF_INET_LOCAL_IN);
ct = nf_ct_get(skb, &ctinfo);
/* Connection must be valid and new. */
NF_CT_ASSERT(ct && (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED ||
ctinfo == IP_CT_RELATED_REPLY));
NF_CT_ASSERT(par->out != NULL);
return nf_nat_setup_info(ct, &mr->range[0], NF_NAT_MANIP_SRC);
}
static unsigned int
ipt_dnat_target(struct sk_buff *skb, const struct xt_action_param *par)
{
struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
NF_CT_ASSERT(par->hooknum == NF_INET_PRE_ROUTING ||
par->hooknum == NF_INET_LOCAL_OUT);
ct = nf_ct_get(skb, &ctinfo);
/* Connection must be valid and new. */
NF_CT_ASSERT(ct && (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED));
return nf_nat_setup_info(ct, &mr->range[0], NF_NAT_MANIP_DST);
}
static int ipt_snat_checkentry(const struct xt_tgchk_param *par)
{
const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
/* Must be a valid range */
if (mr->rangesize != 1) {
pr_info("SNAT: multiple ranges no longer supported\n");
return -EINVAL;
}
return 0;
}
static int ipt_dnat_checkentry(const struct xt_tgchk_param *par)
{
const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
/* Must be a valid range */
if (mr->rangesize != 1) {
pr_info("DNAT: multiple ranges no longer supported\n");
return -EINVAL;
}
return 0;
}
static unsigned int
alloc_null_binding(struct nf_conn *ct, unsigned int hooknum)
{
/* Force range to this IP; let proto decide mapping for
per-proto parts (hence not NF_NAT_RANGE_PROTO_SPECIFIED).
*/
struct nf_nat_ipv4_range range;
range.flags = 0;
pr_debug("Allocating NULL binding for %p (%pI4)\n", ct,
HOOK2MANIP(hooknum) == NF_NAT_MANIP_SRC ?
&ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip :
&ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip);
return nf_nat_setup_info(ct, &range, HOOK2MANIP(hooknum));
}
int nf_nat_rule_find(struct sk_buff *skb,
unsigned int hooknum,
const struct net_device *in,
const struct net_device *out,
struct nf_conn *ct)
{
struct net *net = nf_ct_net(ct);
int ret;
ret = ipt_do_table(skb, hooknum, in, out, net->ipv4.nat_table);
if (ret == NF_ACCEPT) {
if (!nf_nat_initialized(ct, HOOK2MANIP(hooknum)))
/* NUL mapping */
ret = alloc_null_binding(ct, hooknum);
}
return ret;
}
static struct xt_target ipt_snat_reg __read_mostly = {
.name = "SNAT",
.target = ipt_snat_target,
.targetsize = sizeof(struct nf_nat_ipv4_multi_range_compat),
.table = "nat",
.hooks = (1 << NF_INET_POST_ROUTING) | (1 << NF_INET_LOCAL_IN),
.checkentry = ipt_snat_checkentry,
.family = AF_INET,
};
static struct xt_target ipt_dnat_reg __read_mostly = {
.name = "DNAT",
.target = ipt_dnat_target,
.targetsize = sizeof(struct nf_nat_ipv4_multi_range_compat),
.table = "nat",
.hooks = (1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_OUT),
.checkentry = ipt_dnat_checkentry,
.family = AF_INET,
};
static int __net_init nf_nat_rule_net_init(struct net *net)
{
struct ipt_replace *repl;
repl = ipt_alloc_initial_table(&nat_table);
if (repl == NULL)
return -ENOMEM;
net->ipv4.nat_table = ipt_register_table(net, &nat_table, repl);
kfree(repl);
if (IS_ERR(net->ipv4.nat_table))
return PTR_ERR(net->ipv4.nat_table);
return 0;
}
static void __net_exit nf_nat_rule_net_exit(struct net *net)
{
ipt_unregister_table(net, net->ipv4.nat_table);
}
static struct pernet_operations nf_nat_rule_net_ops = {
.init = nf_nat_rule_net_init,
.exit = nf_nat_rule_net_exit,
};
int __init nf_nat_rule_init(void)
{
int ret;
ret = register_pernet_subsys(&nf_nat_rule_net_ops);
if (ret != 0)
goto out;
ret = xt_register_target(&ipt_snat_reg);
if (ret != 0)
goto unregister_table;
ret = xt_register_target(&ipt_dnat_reg);
if (ret != 0)
goto unregister_snat;
return ret;
unregister_snat:
xt_unregister_target(&ipt_snat_reg);
unregister_table:
unregister_pernet_subsys(&nf_nat_rule_net_ops);
out:
return ret;
}
void nf_nat_rule_cleanup(void)
{
xt_unregister_target(&ipt_dnat_reg);
xt_unregister_target(&ipt_snat_reg);
unregister_pernet_subsys(&nf_nat_rule_net_ops);
}
net/ipv4/netfilter/nf_nat_sip.c
View file @ c7232c99
...@@ -19,7 +19,6 @@ ...@@ -19,7 +19,6 @@
#include <net/netfilter/nf_nat.h> #include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_helper.h> #include <net/netfilter/nf_nat_helper.h>
#include <net/netfilter/nf_nat_rule.h>
#include <net/netfilter/nf_conntrack_helper.h> #include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h> #include <net/netfilter/nf_conntrack_expect.h>
#include <linux/netfilter/nf_conntrack_sip.h> #include <linux/netfilter/nf_conntrack_sip.h>
...@@ -255,15 +254,15 @@ static void ip_nat_sip_seq_adjust(struct sk_buff *skb, s16 off) ...@@ -255,15 +254,15 @@ static void ip_nat_sip_seq_adjust(struct sk_buff *skb, s16 off)
static void ip_nat_sip_expected(struct nf_conn *ct, static void ip_nat_sip_expected(struct nf_conn *ct,
struct nf_conntrack_expect *exp) struct nf_conntrack_expect *exp)
{ {
struct nf_nat_ipv4_range range; struct nf_nat_range range;
/* This must be a fresh one. */ /* This must be a fresh one. */
BUG_ON(ct->status & IPS_NAT_DONE_MASK); BUG_ON(ct->status & IPS_NAT_DONE_MASK);
/* For DST manip, map port here to where it's expected. */ /* For DST manip, map port here to where it's expected. */
range.flags = (NF_NAT_RANGE_MAP_IPS | NF_NAT_RANGE_PROTO_SPECIFIED); range.flags = (NF_NAT_RANGE_MAP_IPS | NF_NAT_RANGE_PROTO_SPECIFIED);
range.min = range.max = exp->saved_proto; range.min_proto = range.max_proto = exp->saved_proto;
range.min_ip = range.max_ip = exp->saved_ip; range.min_addr = range.max_addr = exp->saved_addr;
nf_nat_setup_info(ct, &range, NF_NAT_MANIP_DST); nf_nat_setup_info(ct, &range, NF_NAT_MANIP_DST);
/* Change src to where master sends to, but only if the connection /* Change src to where master sends to, but only if the connection
...@@ -271,8 +270,8 @@ static void ip_nat_sip_expected(struct nf_conn *ct, ...@@ -271,8 +270,8 @@ static void ip_nat_sip_expected(struct nf_conn *ct,
if (ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip == if (ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip ==
ct->master->tuplehash[exp->dir].tuple.src.u3.ip) { ct->master->tuplehash[exp->dir].tuple.src.u3.ip) {
range.flags = NF_NAT_RANGE_MAP_IPS; range.flags = NF_NAT_RANGE_MAP_IPS;
range.min_ip = range.max_ip range.min_addr = range.max_addr
= ct->master->tuplehash[!exp->dir].tuple.dst.u3.ip; = ct->master->tuplehash[!exp->dir].tuple.dst.u3;
nf_nat_setup_info(ct, &range, NF_NAT_MANIP_SRC); nf_nat_setup_info(ct, &range, NF_NAT_MANIP_SRC);
} }
} }
...@@ -307,7 +306,7 @@ static unsigned int ip_nat_sip_expect(struct sk_buff *skb, unsigned int protoff, ...@@ -307,7 +306,7 @@ static unsigned int ip_nat_sip_expect(struct sk_buff *skb, unsigned int protoff,
else else
port = ntohs(exp->tuple.dst.u.udp.port); port = ntohs(exp->tuple.dst.u.udp.port);
exp->saved_ip = exp->tuple.dst.u3.ip; exp->saved_addr = exp->tuple.dst.u3;
exp->tuple.dst.u3.ip = newip; exp->tuple.dst.u3.ip = newip;
exp->saved_proto.udp.port = exp->tuple.dst.u.udp.port; exp->saved_proto.udp.port = exp->tuple.dst.u.udp.port;
exp->dir = !dir; exp->dir = !dir;
...@@ -329,7 +328,7 @@ static unsigned int ip_nat_sip_expect(struct sk_buff *skb, unsigned int protoff, ...@@ -329,7 +328,7 @@ static unsigned int ip_nat_sip_expect(struct sk_buff *skb, unsigned int protoff,
if (port == 0) if (port == 0)
return NF_DROP; return NF_DROP;
if (exp->tuple.dst.u3.ip != exp->saved_ip || if (exp->tuple.dst.u3.ip != exp->saved_addr.ip ||
exp->tuple.dst.u.udp.port != exp->saved_proto.udp.port) { exp->tuple.dst.u.udp.port != exp->saved_proto.udp.port) {
buflen = sprintf(buffer, "%pI4:%u", &newip, port); buflen = sprintf(buffer, "%pI4:%u", &newip, port);
if (!mangle_packet(skb, protoff, dataoff, dptr, datalen, if (!mangle_packet(skb, protoff, dataoff, dptr, datalen,
...@@ -485,13 +484,13 @@ static unsigned int ip_nat_sdp_media(struct sk_buff *skb, unsigned int protoff, ...@@ -485,13 +484,13 @@ static unsigned int ip_nat_sdp_media(struct sk_buff *skb, unsigned int protoff,
else else
rtp_addr->ip = ct->tuplehash[!dir].tuple.dst.u3.ip; rtp_addr->ip = ct->tuplehash[!dir].tuple.dst.u3.ip;
rtp_exp->saved_ip = rtp_exp->tuple.dst.u3.ip; rtp_exp->saved_addr = rtp_exp->tuple.dst.u3;
rtp_exp->tuple.dst.u3.ip = rtp_addr->ip; rtp_exp->tuple.dst.u3.ip = rtp_addr->ip;
rtp_exp->saved_proto.udp.port = rtp_exp->tuple.dst.u.udp.port; rtp_exp->saved_proto.udp.port = rtp_exp->tuple.dst.u.udp.port;
rtp_exp->dir = !dir; rtp_exp->dir = !dir;
rtp_exp->expectfn = ip_nat_sip_expected; rtp_exp->expectfn = ip_nat_sip_expected;
rtcp_exp->saved_ip = rtcp_exp->tuple.dst.u3.ip; rtcp_exp->saved_addr = rtcp_exp->tuple.dst.u3;
rtcp_exp->tuple.dst.u3.ip = rtp_addr->ip; rtcp_exp->tuple.dst.u3.ip = rtp_addr->ip;
rtcp_exp->saved_proto.udp.port = rtcp_exp->tuple.dst.u.udp.port; rtcp_exp->saved_proto.udp.port = rtcp_exp->tuple.dst.u.udp.port;
rtcp_exp->dir = !dir; rtcp_exp->dir = !dir;
......
net/ipv4/netfilter/nf_nat_tftp.c
View file @ c7232c99
...@@ -11,7 +11,6 @@ ...@@ -11,7 +11,6 @@
#include <net/netfilter/nf_conntrack_helper.h> #include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h> #include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_nat_helper.h> #include <net/netfilter/nf_nat_helper.h>
#include <net/netfilter/nf_nat_rule.h>
#include <linux/netfilter/nf_conntrack_tftp.h> #include <linux/netfilter/nf_conntrack_tftp.h>
MODULE_AUTHOR("Magnus Boden <mb@ozaba.mine.nu>"); MODULE_AUTHOR("Magnus Boden <mb@ozaba.mine.nu>");
......
net/netfilter/Kconfig
View file @ c7232c99
...@@ -356,6 +356,30 @@ config NETFILTER_NETLINK_QUEUE_CT ...@@ -356,6 +356,30 @@ config NETFILTER_NETLINK_QUEUE_CT
If this option is enabled, NFQUEUE can include Connection Tracking If this option is enabled, NFQUEUE can include Connection Tracking
information together with the packet is the enqueued via NFNETLINK. information together with the packet is the enqueued via NFNETLINK.
config NF_NAT
tristate
config NF_NAT_NEEDED
bool
depends on NF_NAT
default y
config NF_NAT_PROTO_DCCP
tristate
depends on NF_NAT && NF_CT_PROTO_DCCP
default NF_NAT && NF_CT_PROTO_DCCP
config NF_NAT_PROTO_UDPLITE
tristate
depends on NF_NAT && NF_CT_PROTO_UDPLITE
default NF_NAT && NF_CT_PROTO_UDPLITE
config NF_NAT_PROTO_SCTP
tristate
default NF_NAT && NF_CT_PROTO_SCTP
depends on NF_NAT && NF_CT_PROTO_SCTP
select LIBCRC32C
endif # NF_CONNTRACK endif # NF_CONNTRACK
# transparent proxy support # transparent proxy support
......
net/netfilter/Makefile
View file @ c7232c99
...@@ -43,6 +43,17 @@ obj-$(CONFIG_NF_CONNTRACK_SANE) += nf_conntrack_sane.o ...@@ -43,6 +43,17 @@ obj-$(CONFIG_NF_CONNTRACK_SANE) += nf_conntrack_sane.o
obj-$(CONFIG_NF_CONNTRACK_SIP) += nf_conntrack_sip.o obj-$(CONFIG_NF_CONNTRACK_SIP) += nf_conntrack_sip.o
obj-$(CONFIG_NF_CONNTRACK_TFTP) += nf_conntrack_tftp.o obj-$(CONFIG_NF_CONNTRACK_TFTP) += nf_conntrack_tftp.o
nf_nat-y := nf_nat_core.o nf_nat_proto_unknown.o nf_nat_proto_common.o \
nf_nat_proto_udp.o nf_nat_proto_tcp.o nf_nat_helper.o
obj-$(CONFIG_NF_NAT) += nf_nat.o
obj-$(CONFIG_NF_NAT) += xt_nat.o
# NAT protocols (nf_nat)
obj-$(CONFIG_NF_NAT_PROTO_DCCP) += nf_nat_proto_dccp.o
obj-$(CONFIG_NF_NAT_PROTO_UDPLITE) += nf_nat_proto_udplite.o
obj-$(CONFIG_NF_NAT_PROTO_SCTP) += nf_nat_proto_sctp.o
# transparent proxy support # transparent proxy support
obj-$(CONFIG_NETFILTER_TPROXY) += nf_tproxy_core.o obj-$(CONFIG_NETFILTER_TPROXY) += nf_tproxy_core.o
......
net/netfilter/core.c
View file @ c7232c99
...@@ -275,6 +275,11 @@ EXPORT_SYMBOL_GPL(nfq_ct_nat_hook); ...@@ -275,6 +275,11 @@ EXPORT_SYMBOL_GPL(nfq_ct_nat_hook);
#endif /* CONFIG_NF_CONNTRACK */ #endif /* CONFIG_NF_CONNTRACK */
#ifdef CONFIG_NF_NAT_NEEDED
void (*nf_nat_decode_session_hook)(struct sk_buff *, struct flowi *);
EXPORT_SYMBOL(nf_nat_decode_session_hook);
#endif
#ifdef CONFIG_PROC_FS #ifdef CONFIG_PROC_FS
struct proc_dir_entry *proc_net_netfilter; struct proc_dir_entry *proc_net_netfilter;
EXPORT_SYMBOL(proc_net_netfilter); EXPORT_SYMBOL(proc_net_netfilter);
......
net/netfilter/nf_conntrack_core.c
View file @ c7232c99
...@@ -55,6 +55,12 @@ int (*nfnetlink_parse_nat_setup_hook)(struct nf_conn *ct, ...@@ -55,6 +55,12 @@ int (*nfnetlink_parse_nat_setup_hook)(struct nf_conn *ct,
const struct nlattr *attr) __read_mostly; const struct nlattr *attr) __read_mostly;
EXPORT_SYMBOL_GPL(nfnetlink_parse_nat_setup_hook); EXPORT_SYMBOL_GPL(nfnetlink_parse_nat_setup_hook);
int (*nf_nat_seq_adjust_hook)(struct sk_buff *skb,
struct nf_conn *ct,
enum ip_conntrack_info ctinfo,
unsigned int protoff);
EXPORT_SYMBOL_GPL(nf_nat_seq_adjust_hook);
DEFINE_SPINLOCK(nf_conntrack_lock); DEFINE_SPINLOCK(nf_conntrack_lock);
EXPORT_SYMBOL_GPL(nf_conntrack_lock); EXPORT_SYMBOL_GPL(nf_conntrack_lock);
......
net/netfilter/nf_conntrack_netlink.c
View file @ c7232c99
...@@ -45,7 +45,7 @@ ...@@ -45,7 +45,7 @@
#include <net/netfilter/nf_conntrack_timestamp.h> #include <net/netfilter/nf_conntrack_timestamp.h>
#ifdef CONFIG_NF_NAT_NEEDED #ifdef CONFIG_NF_NAT_NEEDED
#include <net/netfilter/nf_nat_core.h> #include <net/netfilter/nf_nat_core.h>
#include <net/netfilter/nf_nat_protocol.h> #include <net/netfilter/nf_nat_l4proto.h>
#include <net/netfilter/nf_nat_helper.h> #include <net/netfilter/nf_nat_helper.h>
#endif #endif
...@@ -1096,13 +1096,14 @@ ctnetlink_parse_nat_setup(struct nf_conn *ct, ...@@ -1096,13 +1096,14 @@ ctnetlink_parse_nat_setup(struct nf_conn *ct,
const struct nlattr *attr) const struct nlattr *attr)
{ {
typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup; typeof(nfnetlink_parse_nat_setup_hook) parse_nat_setup;
int err;
parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook); parse_nat_setup = rcu_dereference(nfnetlink_parse_nat_setup_hook);
if (!parse_nat_setup) { if (!parse_nat_setup) {
#ifdef CONFIG_MODULES #ifdef CONFIG_MODULES
rcu_read_unlock(); rcu_read_unlock();
nfnl_unlock(); nfnl_unlock();
if (request_module("nf-nat-ipv4") < 0) { if (request_module("nf-nat") < 0) {
nfnl_lock(); nfnl_lock();
rcu_read_lock(); rcu_read_lock();
return -EOPNOTSUPP; return -EOPNOTSUPP;
...@@ -1115,7 +1116,26 @@ ctnetlink_parse_nat_setup(struct nf_conn *ct, ...@@ -1115,7 +1116,26 @@ ctnetlink_parse_nat_setup(struct nf_conn *ct,
return -EOPNOTSUPP; return -EOPNOTSUPP;
} }
return parse_nat_setup(ct, manip, attr); err = parse_nat_setup(ct, manip, attr);
if (err == -EAGAIN) {
#ifdef CONFIG_MODULES
rcu_read_unlock();
spin_unlock_bh(&nf_conntrack_lock);
nfnl_unlock();
if (request_module("nf-nat-%u", nf_ct_l3num(ct)) < 0) {
nfnl_lock();
spin_lock_bh(&nf_conntrack_lock);
rcu_read_lock();
return -EOPNOTSUPP;
}
nfnl_lock();
spin_lock_bh(&nf_conntrack_lock);
rcu_read_lock();
#else
err = -EOPNOTSUPP;
#endif
}
return err;
} }
#endif #endif
...@@ -1979,6 +1999,8 @@ ctnetlink_exp_dump_mask(struct sk_buff *skb, ...@@ -1979,6 +1999,8 @@ ctnetlink_exp_dump_mask(struct sk_buff *skb,
return -1; return -1;
} }
static const union nf_inet_addr any_addr;
static int static int
ctnetlink_exp_dump_expect(struct sk_buff *skb, ctnetlink_exp_dump_expect(struct sk_buff *skb,
const struct nf_conntrack_expect *exp) const struct nf_conntrack_expect *exp)
...@@ -2005,7 +2027,8 @@ ctnetlink_exp_dump_expect(struct sk_buff *skb, ...@@ -2005,7 +2027,8 @@ ctnetlink_exp_dump_expect(struct sk_buff *skb,
goto nla_put_failure; goto nla_put_failure;
#ifdef CONFIG_NF_NAT_NEEDED #ifdef CONFIG_NF_NAT_NEEDED
if (exp->saved_ip || exp->saved_proto.all) { if (!nf_inet_addr_cmp(&exp->saved_addr, &any_addr) ||
exp->saved_proto.all) {
nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED); nest_parms = nla_nest_start(skb, CTA_EXPECT_NAT | NLA_F_NESTED);
if (!nest_parms) if (!nest_parms)
goto nla_put_failure; goto nla_put_failure;
...@@ -2014,7 +2037,7 @@ ctnetlink_exp_dump_expect(struct sk_buff *skb, ...@@ -2014,7 +2037,7 @@ ctnetlink_exp_dump_expect(struct sk_buff *skb,
goto nla_put_failure; goto nla_put_failure;
nat_tuple.src.l3num = nf_ct_l3num(master); nat_tuple.src.l3num = nf_ct_l3num(master);
nat_tuple.src.u3.ip = exp->saved_ip; nat_tuple.src.u3 = exp->saved_addr;
nat_tuple.dst.protonum = nf_ct_protonum(master); nat_tuple.dst.protonum = nf_ct_protonum(master);
nat_tuple.src.u = exp->saved_proto; nat_tuple.src.u = exp->saved_proto;
...@@ -2410,7 +2433,7 @@ ctnetlink_parse_expect_nat(const struct nlattr *attr, ...@@ -2410,7 +2433,7 @@ ctnetlink_parse_expect_nat(const struct nlattr *attr,
if (err < 0) if (err < 0)
return err; return err;
exp->saved_ip = nat_tuple.src.u3.ip; exp->saved_addr = nat_tuple.src.u3;
exp->saved_proto = nat_tuple.src.u; exp->saved_proto = nat_tuple.src.u;
exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR])); exp->dir = ntohl(nla_get_be32(tb[CTA_EXPECT_NAT_DIR]));
......
net/netfilter/nf_conntrack_proto_tcp.c
View file @ c7232c99
...@@ -505,10 +505,10 @@ static inline s16 nat_offset(const struct nf_conn *ct, ...@@ -505,10 +505,10 @@ static inline s16 nat_offset(const struct nf_conn *ct,
return get_offset != NULL ? get_offset(ct, dir, seq) : 0; return get_offset != NULL ? get_offset(ct, dir, seq) : 0;
} }
#define NAT_OFFSET(pf, ct, dir, seq) \ #define NAT_OFFSET(ct, dir, seq) \
(pf == NFPROTO_IPV4 ? nat_offset(ct, dir, seq) : 0) (nat_offset(ct, dir, seq))
#else #else
#define NAT_OFFSET(pf, ct, dir, seq) 0 #define NAT_OFFSET(ct, dir, seq) 0
#endif #endif
static bool tcp_in_window(const struct nf_conn *ct, static bool tcp_in_window(const struct nf_conn *ct,
...@@ -541,7 +541,7 @@ static bool tcp_in_window(const struct nf_conn *ct, ...@@ -541,7 +541,7 @@ static bool tcp_in_window(const struct nf_conn *ct,
tcp_sack(skb, dataoff, tcph, &sack); tcp_sack(skb, dataoff, tcph, &sack);
/* Take into account NAT sequence number mangling */ /* Take into account NAT sequence number mangling */
receiver_offset = NAT_OFFSET(pf, ct, !dir, ack - 1); receiver_offset = NAT_OFFSET(ct, !dir, ack - 1);
ack -= receiver_offset; ack -= receiver_offset;
sack -= receiver_offset; sack -= receiver_offset;
......
net/netfilter/nf_conntrack_sip.c
View file @ c7232c99
...@@ -946,11 +946,11 @@ static int set_expected_rtp_rtcp(struct sk_buff *skb, unsigned int protoff, ...@@ -946,11 +946,11 @@ static int set_expected_rtp_rtcp(struct sk_buff *skb, unsigned int protoff,
break; break;
#ifdef CONFIG_NF_NAT_NEEDED #ifdef CONFIG_NF_NAT_NEEDED
if (exp->tuple.src.l3num == AF_INET && !direct_rtp && if (exp->tuple.src.l3num == AF_INET && !direct_rtp &&
(exp->saved_ip != exp->tuple.dst.u3.ip || (exp->saved_addr.ip != exp->tuple.dst.u3.ip ||
exp->saved_proto.udp.port != exp->tuple.dst.u.udp.port) && exp->saved_proto.udp.port != exp->tuple.dst.u.udp.port) &&
ct->status & IPS_NAT_MASK) { ct->status & IPS_NAT_MASK) {
daddr->ip = exp->saved_ip; daddr->ip = exp->saved_addr.ip;
tuple.dst.u3.ip = exp->saved_ip; tuple.dst.u3.ip = exp->saved_addr.ip;
tuple.dst.u.udp.port = exp->saved_proto.udp.port; tuple.dst.u.udp.port = exp->saved_proto.udp.port;
direct_rtp = 1; direct_rtp = 1;
} else } else
......
net/ipv4/netfilter/nf_nat_helper.c → net/netfilter/nf_nat_helper.c
View file @ c7232c99
/* ip_nat_helper.c - generic support functions for NAT helpers /* nf_nat_helper.c - generic support functions for NAT helpers
* *
* (C) 2000-2002 Harald Welte <laforge@netfilter.org> * (C) 2000-2002 Harald Welte <laforge@netfilter.org>
* (C) 2003-2006 Netfilter Core Team <coreteam@netfilter.org> * (C) 2003-2006 Netfilter Core Team <coreteam@netfilter.org>
...@@ -9,23 +9,19 @@ ...@@ -9,23 +9,19 @@
*/ */
#include <linux/module.h> #include <linux/module.h>
#include <linux/gfp.h> #include <linux/gfp.h>
#include <linux/kmod.h>
#include <linux/types.h> #include <linux/types.h>
#include <linux/timer.h>
#include <linux/skbuff.h> #include <linux/skbuff.h>
#include <linux/tcp.h> #include <linux/tcp.h>
#include <linux/udp.h> #include <linux/udp.h>
#include <net/checksum.h>
#include <net/tcp.h> #include <net/tcp.h>
#include <net/route.h>
#include <linux/netfilter_ipv4.h>
#include <net/netfilter/nf_conntrack.h> #include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_helper.h> #include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_ecache.h> #include <net/netfilter/nf_conntrack_ecache.h>
#include <net/netfilter/nf_conntrack_expect.h> #include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_nat.h> #include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_protocol.h> #include <net/netfilter/nf_nat_l3proto.h>
#include <net/netfilter/nf_nat_l4proto.h>
#include <net/netfilter/nf_nat_core.h> #include <net/netfilter/nf_nat_core.h>
#include <net/netfilter/nf_nat_helper.h> #include <net/netfilter/nf_nat_helper.h>
...@@ -90,7 +86,6 @@ s16 nf_nat_get_offset(const struct nf_conn *ct, ...@@ -90,7 +86,6 @@ s16 nf_nat_get_offset(const struct nf_conn *ct,
return offset; return offset;
} }
EXPORT_SYMBOL_GPL(nf_nat_get_offset);
/* Frobs data inside this packet, which is linear. */ /* Frobs data inside this packet, which is linear. */
static void mangle_contents(struct sk_buff *skb, static void mangle_contents(struct sk_buff *skb,
...@@ -125,9 +120,13 @@ static void mangle_contents(struct sk_buff *skb, ...@@ -125,9 +120,13 @@ static void mangle_contents(struct sk_buff *skb,
__skb_trim(skb, skb->len + rep_len - match_len); __skb_trim(skb, skb->len + rep_len - match_len);
} }
if (nf_ct_l3num((struct nf_conn *)skb->nfct) == NFPROTO_IPV4) {
/* fix IP hdr checksum information */ /* fix IP hdr checksum information */
ip_hdr(skb)->tot_len = htons(skb->len); ip_hdr(skb)->tot_len = htons(skb->len);
ip_send_check(ip_hdr(skb)); ip_send_check(ip_hdr(skb));
} else
ipv6_hdr(skb)->payload_len =
htons(skb->len - sizeof(struct ipv6hdr));
} }
/* Unusual, but possible case. */ /* Unusual, but possible case. */
...@@ -166,35 +165,6 @@ void nf_nat_tcp_seq_adjust(struct sk_buff *skb, struct nf_conn *ct, ...@@ -166,35 +165,6 @@ void nf_nat_tcp_seq_adjust(struct sk_buff *skb, struct nf_conn *ct,
} }
EXPORT_SYMBOL_GPL(nf_nat_tcp_seq_adjust); EXPORT_SYMBOL_GPL(nf_nat_tcp_seq_adjust);
static void nf_nat_csum(struct sk_buff *skb, const struct iphdr *iph, void *data,
int datalen, __sum16 *check, int oldlen)
{
struct rtable *rt = skb_rtable(skb);
if (skb->ip_summed != CHECKSUM_PARTIAL) {
if (!(rt->rt_flags & RTCF_LOCAL) &&
(!skb->dev || skb->dev->features & NETIF_F_V4_CSUM)) {
skb->ip_summed = CHECKSUM_PARTIAL;
skb->csum_start = skb_headroom(skb) +
skb_network_offset(skb) +
iph->ihl * 4;
skb->csum_offset = (void *)check - data;
*check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
datalen, iph->protocol, 0);
} else {
*check = 0;
*check = csum_tcpudp_magic(iph->saddr, iph->daddr,
datalen, iph->protocol,
csum_partial(data, datalen,
0));
if (iph->protocol == IPPROTO_UDP && !*check)
*check = CSUM_MANGLED_0;
}
} else
inet_proto_csum_replace2(check, skb,
htons(oldlen), htons(datalen), 1);
}
/* Generic function for mangling variable-length address changes inside /* Generic function for mangling variable-length address changes inside
* NATed TCP connections (like the PORT XXX,XXX,XXX,XXX,XXX,XXX * NATed TCP connections (like the PORT XXX,XXX,XXX,XXX,XXX,XXX
* command in FTP). * command in FTP).
...@@ -212,7 +182,7 @@ int __nf_nat_mangle_tcp_packet(struct sk_buff *skb, ...@@ -212,7 +182,7 @@ int __nf_nat_mangle_tcp_packet(struct sk_buff *skb,
const char *rep_buffer, const char *rep_buffer,
unsigned int rep_len, bool adjust) unsigned int rep_len, bool adjust)
{ {
struct iphdr *iph; const struct nf_nat_l3proto *l3proto;
struct tcphdr *tcph; struct tcphdr *tcph;
int oldlen, datalen; int oldlen, datalen;
...@@ -226,15 +196,17 @@ int __nf_nat_mangle_tcp_packet(struct sk_buff *skb, ...@@ -226,15 +196,17 @@ int __nf_nat_mangle_tcp_packet(struct sk_buff *skb,
SKB_LINEAR_ASSERT(skb); SKB_LINEAR_ASSERT(skb);
iph = ip_hdr(skb); tcph = (void *)skb->data + protoff;
tcph = (void *)iph + iph->ihl*4;
oldlen = skb->len - iph->ihl*4; oldlen = skb->len - protoff;
mangle_contents(skb, iph->ihl*4 + tcph->doff*4, mangle_contents(skb, protoff + tcph->doff*4,
match_offset, match_len, rep_buffer, rep_len); match_offset, match_len, rep_buffer, rep_len);
datalen = skb->len - iph->ihl*4; datalen = skb->len - protoff;
nf_nat_csum(skb, iph, tcph, datalen, &tcph->check, oldlen);
l3proto = __nf_nat_l3proto_find(nf_ct_l3num(ct));
l3proto->csum_recalc(skb, IPPROTO_TCP, tcph, &tcph->check,
datalen, oldlen);
if (adjust && rep_len != match_len) if (adjust && rep_len != match_len)
nf_nat_set_seq_adjust(ct, ctinfo, tcph->seq, nf_nat_set_seq_adjust(ct, ctinfo, tcph->seq,
...@@ -264,7 +236,7 @@ nf_nat_mangle_udp_packet(struct sk_buff *skb, ...@@ -264,7 +236,7 @@ nf_nat_mangle_udp_packet(struct sk_buff *skb,
const char *rep_buffer, const char *rep_buffer,
unsigned int rep_len) unsigned int rep_len)
{ {
struct iphdr *iph; const struct nf_nat_l3proto *l3proto;
struct udphdr *udph; struct udphdr *udph;
int datalen, oldlen; int datalen, oldlen;
...@@ -276,22 +248,23 @@ nf_nat_mangle_udp_packet(struct sk_buff *skb, ...@@ -276,22 +248,23 @@ nf_nat_mangle_udp_packet(struct sk_buff *skb,
!enlarge_skb(skb, rep_len - match_len)) !enlarge_skb(skb, rep_len - match_len))
return 0; return 0;
iph = ip_hdr(skb); udph = (void *)skb->data + protoff;
udph = (void *)iph + iph->ihl*4;
oldlen = skb->len - iph->ihl*4; oldlen = skb->len - protoff;
mangle_contents(skb, iph->ihl*4 + sizeof(*udph), mangle_contents(skb, protoff + sizeof(*udph),
match_offset, match_len, rep_buffer, rep_len); match_offset, match_len, rep_buffer, rep_len);
/* update the length of the UDP packet */ /* update the length of the UDP packet */
datalen = skb->len - iph->ihl*4; datalen = skb->len - protoff;
udph->len = htons(datalen); udph->len = htons(datalen);
/* fix udp checksum if udp checksum was previously calculated */ /* fix udp checksum if udp checksum was previously calculated */
if (!udph->check && skb->ip_summed != CHECKSUM_PARTIAL) if (!udph->check && skb->ip_summed != CHECKSUM_PARTIAL)
return 1; return 1;
nf_nat_csum(skb, iph, udph, datalen, &udph->check, oldlen); l3proto = __nf_nat_l3proto_find(nf_ct_l3num(ct));
l3proto->csum_recalc(skb, IPPROTO_UDP, udph, &udph->check,
datalen, oldlen);
return 1; return 1;
} }
...@@ -343,6 +316,7 @@ sack_adjust(struct sk_buff *skb, ...@@ -343,6 +316,7 @@ sack_adjust(struct sk_buff *skb,
/* TCP SACK sequence number adjustment */ /* TCP SACK sequence number adjustment */
static inline unsigned int static inline unsigned int
nf_nat_sack_adjust(struct sk_buff *skb, nf_nat_sack_adjust(struct sk_buff *skb,
unsigned int protoff,
struct tcphdr *tcph, struct tcphdr *tcph,
struct nf_conn *ct, struct nf_conn *ct,
enum ip_conntrack_info ctinfo) enum ip_conntrack_info ctinfo)
...@@ -350,8 +324,8 @@ nf_nat_sack_adjust(struct sk_buff *skb, ...@@ -350,8 +324,8 @@ nf_nat_sack_adjust(struct sk_buff *skb,
unsigned int dir, optoff, optend; unsigned int dir, optoff, optend;
struct nf_conn_nat *nat = nfct_nat(ct); struct nf_conn_nat *nat = nfct_nat(ct);
optoff = ip_hdrlen(skb) + sizeof(struct tcphdr); optoff = protoff + sizeof(struct tcphdr);
optend = ip_hdrlen(skb) + tcph->doff * 4; optend = protoff + tcph->doff * 4;
if (!skb_make_writable(skb, optend)) if (!skb_make_writable(skb, optend))
return 0; return 0;
...@@ -432,7 +406,7 @@ nf_nat_seq_adjust(struct sk_buff *skb, ...@@ -432,7 +406,7 @@ nf_nat_seq_adjust(struct sk_buff *skb,
tcph->seq = newseq; tcph->seq = newseq;
tcph->ack_seq = newack; tcph->ack_seq = newack;
return nf_nat_sack_adjust(skb, tcph, ct, ctinfo); return nf_nat_sack_adjust(skb, protoff, tcph, ct, ctinfo);
} }
/* Setup NAT on this expected conntrack so it follows master. */ /* Setup NAT on this expected conntrack so it follows master. */
...@@ -440,22 +414,22 @@ nf_nat_seq_adjust(struct sk_buff *skb, ...@@ -440,22 +414,22 @@ nf_nat_seq_adjust(struct sk_buff *skb,
void nf_nat_follow_master(struct nf_conn *ct, void nf_nat_follow_master(struct nf_conn *ct,
struct nf_conntrack_expect *exp) struct nf_conntrack_expect *exp)
{ {
struct nf_nat_ipv4_range range; struct nf_nat_range range;
/* This must be a fresh one. */ /* This must be a fresh one. */
BUG_ON(ct->status & IPS_NAT_DONE_MASK); BUG_ON(ct->status & IPS_NAT_DONE_MASK);
/* Change src to where master sends to */ /* Change src to where master sends to */
range.flags = NF_NAT_RANGE_MAP_IPS; range.flags = NF_NAT_RANGE_MAP_IPS;
range.min_ip = range.max_ip range.min_addr = range.max_addr
= ct->master->tuplehash[!exp->dir].tuple.dst.u3.ip; = ct->master->tuplehash[!exp->dir].tuple.dst.u3;
nf_nat_setup_info(ct, &range, NF_NAT_MANIP_SRC); nf_nat_setup_info(ct, &range, NF_NAT_MANIP_SRC);
/* For DST manip, map port here to where it's expected. */ /* For DST manip, map port here to where it's expected. */
range.flags = (NF_NAT_RANGE_MAP_IPS | NF_NAT_RANGE_PROTO_SPECIFIED); range.flags = (NF_NAT_RANGE_MAP_IPS | NF_NAT_RANGE_PROTO_SPECIFIED);
range.min = range.max = exp->saved_proto; range.min_proto = range.max_proto = exp->saved_proto;
range.min_ip = range.max_ip range.min_addr = range.max_addr
= ct->master->tuplehash[!exp->dir].tuple.src.u3.ip; = ct->master->tuplehash[!exp->dir].tuple.src.u3;
nf_nat_setup_info(ct, &range, NF_NAT_MANIP_DST); nf_nat_setup_info(ct, &range, NF_NAT_MANIP_DST);
} }
EXPORT_SYMBOL(nf_nat_follow_master); EXPORT_SYMBOL(nf_nat_follow_master);
net/ipv4/netfilter/nf_nat_proto_common.c → net/netfilter/nf_nat_proto_common.c
View file @ c7232c99
...@@ -9,17 +9,15 @@ ...@@ -9,17 +9,15 @@
#include <linux/types.h> #include <linux/types.h>
#include <linux/random.h> #include <linux/random.h>
#include <linux/ip.h>
#include <linux/netfilter.h> #include <linux/netfilter.h>
#include <linux/export.h> #include <linux/export.h>
#include <net/secure_seq.h>
#include <net/netfilter/nf_nat.h> #include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_core.h> #include <net/netfilter/nf_nat_core.h>
#include <net/netfilter/nf_nat_rule.h> #include <net/netfilter/nf_nat_l3proto.h>
#include <net/netfilter/nf_nat_protocol.h> #include <net/netfilter/nf_nat_l4proto.h>
bool nf_nat_proto_in_range(const struct nf_conntrack_tuple *tuple, bool nf_nat_l4proto_in_range(const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype, enum nf_nat_manip_type maniptype,
const union nf_conntrack_man_proto *min, const union nf_conntrack_man_proto *min,
const union nf_conntrack_man_proto *max) const union nf_conntrack_man_proto *max)
...@@ -34,13 +32,14 @@ bool nf_nat_proto_in_range(const struct nf_conntrack_tuple *tuple, ...@@ -34,13 +32,14 @@ bool nf_nat_proto_in_range(const struct nf_conntrack_tuple *tuple,
return ntohs(port) >= ntohs(min->all) && return ntohs(port) >= ntohs(min->all) &&
ntohs(port) <= ntohs(max->all); ntohs(port) <= ntohs(max->all);
} }
EXPORT_SYMBOL_GPL(nf_nat_proto_in_range); EXPORT_SYMBOL_GPL(nf_nat_l4proto_in_range);
void nf_nat_proto_unique_tuple(struct nf_conntrack_tuple *tuple, void nf_nat_l4proto_unique_tuple(const struct nf_nat_l3proto *l3proto,
const struct nf_nat_ipv4_range *range, struct nf_conntrack_tuple *tuple,
const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype, enum nf_nat_manip_type maniptype,
const struct nf_conn *ct, const struct nf_conn *ct,
u_int16_t *rover) u16 *rover)
{ {
unsigned int range_size, min, i; unsigned int range_size, min, i;
__be16 *portptr; __be16 *portptr;
...@@ -71,13 +70,12 @@ void nf_nat_proto_unique_tuple(struct nf_conntrack_tuple *tuple, ...@@ -71,13 +70,12 @@ void nf_nat_proto_unique_tuple(struct nf_conntrack_tuple *tuple,
range_size = 65535 - 1024 + 1; range_size = 65535 - 1024 + 1;
} }
} else { } else {
min = ntohs(range->min.all); min = ntohs(range->min_proto.all);
range_size = ntohs(range->max.all) - min + 1; range_size = ntohs(range->max_proto.all) - min + 1;
} }
if (range->flags & NF_NAT_RANGE_PROTO_RANDOM) if (range->flags & NF_NAT_RANGE_PROTO_RANDOM)
off = secure_ipv4_port_ephemeral(tuple->src.u3.ip, tuple->dst.u3.ip, off = l3proto->secure_port(tuple, maniptype == NF_NAT_MANIP_SRC
maniptype == NF_NAT_MANIP_SRC
? tuple->dst.u.all ? tuple->dst.u.all
: tuple->src.u.all); : tuple->src.u.all);
else else
...@@ -93,22 +91,22 @@ void nf_nat_proto_unique_tuple(struct nf_conntrack_tuple *tuple, ...@@ -93,22 +91,22 @@ void nf_nat_proto_unique_tuple(struct nf_conntrack_tuple *tuple,
} }
return; return;
} }
EXPORT_SYMBOL_GPL(nf_nat_proto_unique_tuple); EXPORT_SYMBOL_GPL(nf_nat_l4proto_unique_tuple);
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
int nf_nat_proto_nlattr_to_range(struct nlattr *tb[], int nf_nat_l4proto_nlattr_to_range(struct nlattr *tb[],
struct nf_nat_ipv4_range *range) struct nf_nat_range *range)
{ {
if (tb[CTA_PROTONAT_PORT_MIN]) { if (tb[CTA_PROTONAT_PORT_MIN]) {
range->min.all = nla_get_be16(tb[CTA_PROTONAT_PORT_MIN]); range->min_proto.all = nla_get_be16(tb[CTA_PROTONAT_PORT_MIN]);
range->max.all = range->min.tcp.port; range->max_proto.all = range->min_proto.all;
range->flags |= NF_NAT_RANGE_PROTO_SPECIFIED; range->flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
} }
if (tb[CTA_PROTONAT_PORT_MAX]) { if (tb[CTA_PROTONAT_PORT_MAX]) {
range->max.all = nla_get_be16(tb[CTA_PROTONAT_PORT_MAX]); range->max_proto.all = nla_get_be16(tb[CTA_PROTONAT_PORT_MAX]);
range->flags |= NF_NAT_RANGE_PROTO_SPECIFIED; range->flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
} }
return 0; return 0;
} }
EXPORT_SYMBOL_GPL(nf_nat_proto_nlattr_to_range); EXPORT_SYMBOL_GPL(nf_nat_l4proto_nlattr_to_range);
#endif #endif
net/ipv4/netfilter/nf_nat_proto_dccp.c → net/netfilter/nf_nat_proto_dccp.c
View file @ c7232c99
/* /*
* DCCP NAT protocol helper * DCCP NAT protocol helper
* *
* Copyright (c) 2005, 2006. 2008 Patrick McHardy <kaber@trash.net> * Copyright (c) 2005, 2006, 2008 Patrick McHardy <kaber@trash.net>
* *
* This program is free software; you can redistribute it and/or modify * 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 * it under the terms of the GNU General Public License version 2 as
...@@ -13,35 +13,34 @@ ...@@ -13,35 +13,34 @@
#include <linux/module.h> #include <linux/module.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/skbuff.h> #include <linux/skbuff.h>
#include <linux/ip.h>
#include <linux/dccp.h> #include <linux/dccp.h>
#include <net/netfilter/nf_conntrack.h> #include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_nat.h> #include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_protocol.h> #include <net/netfilter/nf_nat_l3proto.h>
#include <net/netfilter/nf_nat_l4proto.h>
static u_int16_t dccp_port_rover; static u_int16_t dccp_port_rover;
static void static void
dccp_unique_tuple(struct nf_conntrack_tuple *tuple, dccp_unique_tuple(const struct nf_nat_l3proto *l3proto,
const struct nf_nat_ipv4_range *range, struct nf_conntrack_tuple *tuple,
const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype, enum nf_nat_manip_type maniptype,
const struct nf_conn *ct) const struct nf_conn *ct)
{ {
nf_nat_proto_unique_tuple(tuple, range, maniptype, ct, nf_nat_l4proto_unique_tuple(l3proto, tuple, range, maniptype, ct,
&dccp_port_rover); &dccp_port_rover);
} }
static bool static bool
dccp_manip_pkt(struct sk_buff *skb, dccp_manip_pkt(struct sk_buff *skb,
unsigned int iphdroff, const struct nf_nat_l3proto *l3proto,
unsigned int iphdroff, unsigned int hdroff,
const struct nf_conntrack_tuple *tuple, const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype) enum nf_nat_manip_type maniptype)
{ {
const struct iphdr *iph = (const void *)(skb->data + iphdroff);
struct dccp_hdr *hdr; struct dccp_hdr *hdr;
unsigned int hdroff = iphdroff + iph->ihl * 4;
__be32 oldip, newip;
__be16 *portptr, oldport, newport; __be16 *portptr, oldport, newport;
int hdrsize = 8; /* DCCP connection tracking guarantees this much */ int hdrsize = 8; /* DCCP connection tracking guarantees this much */
...@@ -51,17 +50,12 @@ dccp_manip_pkt(struct sk_buff *skb, ...@@ -51,17 +50,12 @@ dccp_manip_pkt(struct sk_buff *skb,
if (!skb_make_writable(skb, hdroff + hdrsize)) if (!skb_make_writable(skb, hdroff + hdrsize))
return false; return false;
iph = (struct iphdr *)(skb->data + iphdroff);
hdr = (struct dccp_hdr *)(skb->data + hdroff); hdr = (struct dccp_hdr *)(skb->data + hdroff);
if (maniptype == NF_NAT_MANIP_SRC) { if (maniptype == NF_NAT_MANIP_SRC) {
oldip = iph->saddr;
newip = tuple->src.u3.ip;
newport = tuple->src.u.dccp.port; newport = tuple->src.u.dccp.port;
portptr = &hdr->dccph_sport; portptr = &hdr->dccph_sport;
} else { } else {
oldip = iph->daddr;
newip = tuple->dst.u3.ip;
newport = tuple->dst.u.dccp.port; newport = tuple->dst.u.dccp.port;
portptr = &hdr->dccph_dport; portptr = &hdr->dccph_dport;
} }
...@@ -72,30 +66,46 @@ dccp_manip_pkt(struct sk_buff *skb, ...@@ -72,30 +66,46 @@ dccp_manip_pkt(struct sk_buff *skb,
if (hdrsize < sizeof(*hdr)) if (hdrsize < sizeof(*hdr))
return true; return true;
inet_proto_csum_replace4(&hdr->dccph_checksum, skb, oldip, newip, 1); l3proto->csum_update(skb, iphdroff, &hdr->dccph_checksum,
tuple, maniptype);
inet_proto_csum_replace2(&hdr->dccph_checksum, skb, oldport, newport, inet_proto_csum_replace2(&hdr->dccph_checksum, skb, oldport, newport,
0); 0);
return true; return true;
} }
static const struct nf_nat_protocol nf_nat_protocol_dccp = { static const struct nf_nat_l4proto nf_nat_l4proto_dccp = {
.protonum = IPPROTO_DCCP, .l4proto = IPPROTO_DCCP,
.manip_pkt = dccp_manip_pkt, .manip_pkt = dccp_manip_pkt,
.in_range = nf_nat_proto_in_range, .in_range = nf_nat_l4proto_in_range,
.unique_tuple = dccp_unique_tuple, .unique_tuple = dccp_unique_tuple,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.nlattr_to_range = nf_nat_proto_nlattr_to_range, .nlattr_to_range = nf_nat_l4proto_nlattr_to_range,
#endif #endif
}; };
static int __init nf_nat_proto_dccp_init(void) static int __init nf_nat_proto_dccp_init(void)
{ {
return nf_nat_protocol_register(&nf_nat_protocol_dccp); int err;
err = nf_nat_l4proto_register(NFPROTO_IPV4, &nf_nat_l4proto_dccp);
if (err < 0)
goto err1;
err = nf_nat_l4proto_register(NFPROTO_IPV6, &nf_nat_l4proto_dccp);
if (err < 0)
goto err2;
return 0;
err2:
nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_dccp);
err1:
return err;
} }
static void __exit nf_nat_proto_dccp_fini(void) static void __exit nf_nat_proto_dccp_fini(void)
{ {
nf_nat_protocol_unregister(&nf_nat_protocol_dccp); nf_nat_l4proto_unregister(NFPROTO_IPV6, &nf_nat_l4proto_dccp);
nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_dccp);
} }
module_init(nf_nat_proto_dccp_init); module_init(nf_nat_proto_dccp_init);
......
net/ipv4/netfilter/nf_nat_proto_sctp.c → net/netfilter/nf_nat_proto_sctp.c
View file @ c7232c99
...@@ -8,53 +8,46 @@ ...@@ -8,53 +8,46 @@
#include <linux/types.h> #include <linux/types.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/ip.h>
#include <linux/sctp.h> #include <linux/sctp.h>
#include <linux/module.h> #include <linux/module.h>
#include <net/sctp/checksum.h> #include <net/sctp/checksum.h>
#include <net/netfilter/nf_nat_protocol.h> #include <net/netfilter/nf_nat_l4proto.h>
static u_int16_t nf_sctp_port_rover; static u_int16_t nf_sctp_port_rover;
static void static void
sctp_unique_tuple(struct nf_conntrack_tuple *tuple, sctp_unique_tuple(const struct nf_nat_l3proto *l3proto,
const struct nf_nat_ipv4_range *range, struct nf_conntrack_tuple *tuple,
const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype, enum nf_nat_manip_type maniptype,
const struct nf_conn *ct) const struct nf_conn *ct)
{ {
nf_nat_proto_unique_tuple(tuple, range, maniptype, ct, nf_nat_l4proto_unique_tuple(l3proto, tuple, range, maniptype, ct,
&nf_sctp_port_rover); &nf_sctp_port_rover);
} }
static bool static bool
sctp_manip_pkt(struct sk_buff *skb, sctp_manip_pkt(struct sk_buff *skb,
unsigned int iphdroff, const struct nf_nat_l3proto *l3proto,
unsigned int iphdroff, unsigned int hdroff,
const struct nf_conntrack_tuple *tuple, const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype) enum nf_nat_manip_type maniptype)
{ {
const struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff);
struct sk_buff *frag; struct sk_buff *frag;
sctp_sctphdr_t *hdr; sctp_sctphdr_t *hdr;
unsigned int hdroff = iphdroff + iph->ihl*4;
__be32 oldip, newip;
__be32 crc32; __be32 crc32;
if (!skb_make_writable(skb, hdroff + sizeof(*hdr))) if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
return false; return false;
iph = (struct iphdr *)(skb->data + iphdroff);
hdr = (struct sctphdr *)(skb->data + hdroff); hdr = (struct sctphdr *)(skb->data + hdroff);
if (maniptype == NF_NAT_MANIP_SRC) { if (maniptype == NF_NAT_MANIP_SRC) {
/* Get rid of src ip and src pt */ /* Get rid of src port */
oldip = iph->saddr;
newip = tuple->src.u3.ip;
hdr->source = tuple->src.u.sctp.port; hdr->source = tuple->src.u.sctp.port;
} else { } else {
/* Get rid of dst ip and dst pt */ /* Get rid of dst port */
oldip = iph->daddr;
newip = tuple->dst.u3.ip;
hdr->dest = tuple->dst.u.sctp.port; hdr->dest = tuple->dst.u.sctp.port;
} }
...@@ -68,24 +61,38 @@ sctp_manip_pkt(struct sk_buff *skb, ...@@ -68,24 +61,38 @@ sctp_manip_pkt(struct sk_buff *skb,
return true; return true;
} }
static const struct nf_nat_protocol nf_nat_protocol_sctp = { static const struct nf_nat_l4proto nf_nat_l4proto_sctp = {
.protonum = IPPROTO_SCTP, .l4proto = IPPROTO_SCTP,
.manip_pkt = sctp_manip_pkt, .manip_pkt = sctp_manip_pkt,
.in_range = nf_nat_proto_in_range, .in_range = nf_nat_l4proto_in_range,
.unique_tuple = sctp_unique_tuple, .unique_tuple = sctp_unique_tuple,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.nlattr_to_range = nf_nat_proto_nlattr_to_range, .nlattr_to_range = nf_nat_l4proto_nlattr_to_range,
#endif #endif
}; };
static int __init nf_nat_proto_sctp_init(void) static int __init nf_nat_proto_sctp_init(void)
{ {
return nf_nat_protocol_register(&nf_nat_protocol_sctp); int err;
err = nf_nat_l4proto_register(NFPROTO_IPV4, &nf_nat_l4proto_sctp);
if (err < 0)
goto err1;
err = nf_nat_l4proto_register(NFPROTO_IPV6, &nf_nat_l4proto_sctp);
if (err < 0)
goto err2;
return 0;
err2:
nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_sctp);
err1:
return err;
} }
static void __exit nf_nat_proto_sctp_exit(void) static void __exit nf_nat_proto_sctp_exit(void)
{ {
nf_nat_protocol_unregister(&nf_nat_protocol_sctp); nf_nat_l4proto_unregister(NFPROTO_IPV6, &nf_nat_l4proto_sctp);
nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_sctp);
} }
module_init(nf_nat_proto_sctp_init); module_init(nf_nat_proto_sctp_init);
......
net/ipv4/netfilter/nf_nat_proto_tcp.c → net/netfilter/nf_nat_proto_tcp.c
View file @ c7232c99
...@@ -9,37 +9,36 @@ ...@@ -9,37 +9,36 @@
#include <linux/types.h> #include <linux/types.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/export.h> #include <linux/export.h>
#include <linux/ip.h>
#include <linux/tcp.h> #include <linux/tcp.h>
#include <linux/netfilter.h> #include <linux/netfilter.h>
#include <linux/netfilter/nfnetlink_conntrack.h> #include <linux/netfilter/nfnetlink_conntrack.h>
#include <net/netfilter/nf_nat.h> #include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_rule.h> #include <net/netfilter/nf_nat_l3proto.h>
#include <net/netfilter/nf_nat_protocol.h> #include <net/netfilter/nf_nat_l4proto.h>
#include <net/netfilter/nf_nat_core.h> #include <net/netfilter/nf_nat_core.h>
static u_int16_t tcp_port_rover; static u16 tcp_port_rover;
static void static void
tcp_unique_tuple(struct nf_conntrack_tuple *tuple, tcp_unique_tuple(const struct nf_nat_l3proto *l3proto,
const struct nf_nat_ipv4_range *range, struct nf_conntrack_tuple *tuple,
const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype, enum nf_nat_manip_type maniptype,
const struct nf_conn *ct) const struct nf_conn *ct)
{ {
nf_nat_proto_unique_tuple(tuple, range, maniptype, ct, &tcp_port_rover); nf_nat_l4proto_unique_tuple(l3proto, tuple, range, maniptype, ct,
&tcp_port_rover);
} }
static bool static bool
tcp_manip_pkt(struct sk_buff *skb, tcp_manip_pkt(struct sk_buff *skb,
unsigned int iphdroff, const struct nf_nat_l3proto *l3proto,
unsigned int iphdroff, unsigned int hdroff,
const struct nf_conntrack_tuple *tuple, const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype) enum nf_nat_manip_type maniptype)
{ {
const struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff);
struct tcphdr *hdr; struct tcphdr *hdr;
unsigned int hdroff = iphdroff + iph->ihl*4;
__be32 oldip, newip;
__be16 *portptr, newport, oldport; __be16 *portptr, newport, oldport;
int hdrsize = 8; /* TCP connection tracking guarantees this much */ int hdrsize = 8; /* TCP connection tracking guarantees this much */
...@@ -52,19 +51,14 @@ tcp_manip_pkt(struct sk_buff *skb, ...@@ -52,19 +51,14 @@ tcp_manip_pkt(struct sk_buff *skb,
if (!skb_make_writable(skb, hdroff + hdrsize)) if (!skb_make_writable(skb, hdroff + hdrsize))
return false; return false;
iph = (struct iphdr *)(skb->data + iphdroff);
hdr = (struct tcphdr *)(skb->data + hdroff); hdr = (struct tcphdr *)(skb->data + hdroff);
if (maniptype == NF_NAT_MANIP_SRC) { if (maniptype == NF_NAT_MANIP_SRC) {
/* Get rid of src ip and src pt */ /* Get rid of src port */
oldip = iph->saddr;
newip = tuple->src.u3.ip;
newport = tuple->src.u.tcp.port; newport = tuple->src.u.tcp.port;
portptr = &hdr->source; portptr = &hdr->source;
} else { } else {
/* Get rid of dst ip and dst pt */ /* Get rid of dst port */
oldip = iph->daddr;
newip = tuple->dst.u3.ip;
newport = tuple->dst.u.tcp.port; newport = tuple->dst.u.tcp.port;
portptr = &hdr->dest; portptr = &hdr->dest;
} }
...@@ -75,17 +69,17 @@ tcp_manip_pkt(struct sk_buff *skb, ...@@ -75,17 +69,17 @@ tcp_manip_pkt(struct sk_buff *skb,
if (hdrsize < sizeof(*hdr)) if (hdrsize < sizeof(*hdr))
return true; return true;
inet_proto_csum_replace4(&hdr->check, skb, oldip, newip, 1); l3proto->csum_update(skb, iphdroff, &hdr->check, tuple, maniptype);
inet_proto_csum_replace2(&hdr->check, skb, oldport, newport, 0); inet_proto_csum_replace2(&hdr->check, skb, oldport, newport, 0);
return true; return true;
} }
const struct nf_nat_protocol nf_nat_protocol_tcp = { const struct nf_nat_l4proto nf_nat_l4proto_tcp = {
.protonum = IPPROTO_TCP, .l4proto = IPPROTO_TCP,
.manip_pkt = tcp_manip_pkt, .manip_pkt = tcp_manip_pkt,
.in_range = nf_nat_proto_in_range, .in_range = nf_nat_l4proto_in_range,
.unique_tuple = tcp_unique_tuple, .unique_tuple = tcp_unique_tuple,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.nlattr_to_range = nf_nat_proto_nlattr_to_range, .nlattr_to_range = nf_nat_l4proto_nlattr_to_range,
#endif #endif
}; };
net/ipv4/netfilter/nf_nat_proto_udp.c → net/netfilter/nf_nat_proto_udp.c
View file @ c7232c99
...@@ -9,59 +9,53 @@ ...@@ -9,59 +9,53 @@
#include <linux/types.h> #include <linux/types.h>
#include <linux/export.h> #include <linux/export.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/ip.h>
#include <linux/udp.h> #include <linux/udp.h>
#include <linux/netfilter.h> #include <linux/netfilter.h>
#include <net/netfilter/nf_nat.h> #include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_core.h> #include <net/netfilter/nf_nat_core.h>
#include <net/netfilter/nf_nat_rule.h> #include <net/netfilter/nf_nat_l3proto.h>
#include <net/netfilter/nf_nat_protocol.h> #include <net/netfilter/nf_nat_l4proto.h>
static u_int16_t udp_port_rover; static u16 udp_port_rover;
static void static void
udp_unique_tuple(struct nf_conntrack_tuple *tuple, udp_unique_tuple(const struct nf_nat_l3proto *l3proto,
const struct nf_nat_ipv4_range *range, struct nf_conntrack_tuple *tuple,
const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype, enum nf_nat_manip_type maniptype,
const struct nf_conn *ct) const struct nf_conn *ct)
{ {
nf_nat_proto_unique_tuple(tuple, range, maniptype, ct, &udp_port_rover); nf_nat_l4proto_unique_tuple(l3proto, tuple, range, maniptype, ct,
&udp_port_rover);
} }
static bool static bool
udp_manip_pkt(struct sk_buff *skb, udp_manip_pkt(struct sk_buff *skb,
unsigned int iphdroff, const struct nf_nat_l3proto *l3proto,
unsigned int iphdroff, unsigned int hdroff,
const struct nf_conntrack_tuple *tuple, const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype) enum nf_nat_manip_type maniptype)
{ {
const struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff);
struct udphdr *hdr; struct udphdr *hdr;
unsigned int hdroff = iphdroff + iph->ihl*4;
__be32 oldip, newip;
__be16 *portptr, newport; __be16 *portptr, newport;
if (!skb_make_writable(skb, hdroff + sizeof(*hdr))) if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
return false; return false;
iph = (struct iphdr *)(skb->data + iphdroff);
hdr = (struct udphdr *)(skb->data + hdroff); hdr = (struct udphdr *)(skb->data + hdroff);
if (maniptype == NF_NAT_MANIP_SRC) { if (maniptype == NF_NAT_MANIP_SRC) {
/* Get rid of src ip and src pt */ /* Get rid of src port */
oldip = iph->saddr;
newip = tuple->src.u3.ip;
newport = tuple->src.u.udp.port; newport = tuple->src.u.udp.port;
portptr = &hdr->source; portptr = &hdr->source;
} else { } else {
/* Get rid of dst ip and dst pt */ /* Get rid of dst port */
oldip = iph->daddr;
newip = tuple->dst.u3.ip;
newport = tuple->dst.u.udp.port; newport = tuple->dst.u.udp.port;
portptr = &hdr->dest; portptr = &hdr->dest;
} }
if (hdr->check || skb->ip_summed == CHECKSUM_PARTIAL) { if (hdr->check || skb->ip_summed == CHECKSUM_PARTIAL) {
inet_proto_csum_replace4(&hdr->check, skb, oldip, newip, 1); l3proto->csum_update(skb, iphdroff, &hdr->check,
tuple, maniptype);
inet_proto_csum_replace2(&hdr->check, skb, *portptr, newport, inet_proto_csum_replace2(&hdr->check, skb, *portptr, newport,
0); 0);
if (!hdr->check) if (!hdr->check)
...@@ -71,12 +65,12 @@ udp_manip_pkt(struct sk_buff *skb, ...@@ -71,12 +65,12 @@ udp_manip_pkt(struct sk_buff *skb,
return true; return true;
} }
const struct nf_nat_protocol nf_nat_protocol_udp = { const struct nf_nat_l4proto nf_nat_l4proto_udp = {
.protonum = IPPROTO_UDP, .l4proto = IPPROTO_UDP,
.manip_pkt = udp_manip_pkt, .manip_pkt = udp_manip_pkt,
.in_range = nf_nat_proto_in_range, .in_range = nf_nat_l4proto_in_range,
.unique_tuple = udp_unique_tuple, .unique_tuple = udp_unique_tuple,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.nlattr_to_range = nf_nat_proto_nlattr_to_range, .nlattr_to_range = nf_nat_l4proto_nlattr_to_range,
#endif #endif
}; };
net/ipv4/netfilter/nf_nat_proto_udplite.c → net/netfilter/nf_nat_proto_udplite.c
View file @ c7232c99
...@@ -9,59 +9,53 @@ ...@@ -9,59 +9,53 @@
#include <linux/types.h> #include <linux/types.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/ip.h>
#include <linux/udp.h> #include <linux/udp.h>
#include <linux/netfilter.h> #include <linux/netfilter.h>
#include <linux/module.h> #include <linux/module.h>
#include <net/netfilter/nf_nat.h> #include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_protocol.h> #include <net/netfilter/nf_nat_l3proto.h>
#include <net/netfilter/nf_nat_l4proto.h>
static u_int16_t udplite_port_rover; static u16 udplite_port_rover;
static void static void
udplite_unique_tuple(struct nf_conntrack_tuple *tuple, udplite_unique_tuple(const struct nf_nat_l3proto *l3proto,
const struct nf_nat_ipv4_range *range, struct nf_conntrack_tuple *tuple,
const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype, enum nf_nat_manip_type maniptype,
const struct nf_conn *ct) const struct nf_conn *ct)
{ {
nf_nat_proto_unique_tuple(tuple, range, maniptype, ct, nf_nat_l4proto_unique_tuple(l3proto, tuple, range, maniptype, ct,
&udplite_port_rover); &udplite_port_rover);
} }
static bool static bool
udplite_manip_pkt(struct sk_buff *skb, udplite_manip_pkt(struct sk_buff *skb,
unsigned int iphdroff, const struct nf_nat_l3proto *l3proto,
unsigned int iphdroff, unsigned int hdroff,
const struct nf_conntrack_tuple *tuple, const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype) enum nf_nat_manip_type maniptype)
{ {
const struct iphdr *iph = (struct iphdr *)(skb->data + iphdroff);
struct udphdr *hdr; struct udphdr *hdr;
unsigned int hdroff = iphdroff + iph->ihl*4;
__be32 oldip, newip;
__be16 *portptr, newport; __be16 *portptr, newport;
if (!skb_make_writable(skb, hdroff + sizeof(*hdr))) if (!skb_make_writable(skb, hdroff + sizeof(*hdr)))
return false; return false;
iph = (struct iphdr *)(skb->data + iphdroff);
hdr = (struct udphdr *)(skb->data + hdroff); hdr = (struct udphdr *)(skb->data + hdroff);
if (maniptype == NF_NAT_MANIP_SRC) { if (maniptype == NF_NAT_MANIP_SRC) {
/* Get rid of src ip and src pt */ /* Get rid of source port */
oldip = iph->saddr;
newip = tuple->src.u3.ip;
newport = tuple->src.u.udp.port; newport = tuple->src.u.udp.port;
portptr = &hdr->source; portptr = &hdr->source;
} else { } else {
/* Get rid of dst ip and dst pt */ /* Get rid of dst port */
oldip = iph->daddr;
newip = tuple->dst.u3.ip;
newport = tuple->dst.u.udp.port; newport = tuple->dst.u.udp.port;
portptr = &hdr->dest; portptr = &hdr->dest;
} }
inet_proto_csum_replace4(&hdr->check, skb, oldip, newip, 1); l3proto->csum_update(skb, iphdroff, &hdr->check, tuple, maniptype);
inet_proto_csum_replace2(&hdr->check, skb, *portptr, newport, 0); inet_proto_csum_replace2(&hdr->check, skb, *portptr, newport, 0);
if (!hdr->check) if (!hdr->check)
hdr->check = CSUM_MANGLED_0; hdr->check = CSUM_MANGLED_0;
...@@ -70,24 +64,38 @@ udplite_manip_pkt(struct sk_buff *skb, ...@@ -70,24 +64,38 @@ udplite_manip_pkt(struct sk_buff *skb,
return true; return true;
} }
static const struct nf_nat_protocol nf_nat_protocol_udplite = { static const struct nf_nat_l4proto nf_nat_l4proto_udplite = {
.protonum = IPPROTO_UDPLITE, .l4proto = IPPROTO_UDPLITE,
.manip_pkt = udplite_manip_pkt, .manip_pkt = udplite_manip_pkt,
.in_range = nf_nat_proto_in_range, .in_range = nf_nat_l4proto_in_range,
.unique_tuple = udplite_unique_tuple, .unique_tuple = udplite_unique_tuple,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.nlattr_to_range = nf_nat_proto_nlattr_to_range, .nlattr_to_range = nf_nat_l4proto_nlattr_to_range,
#endif #endif
}; };
static int __init nf_nat_proto_udplite_init(void) static int __init nf_nat_proto_udplite_init(void)
{ {
return nf_nat_protocol_register(&nf_nat_protocol_udplite); int err;
err = nf_nat_l4proto_register(NFPROTO_IPV4, &nf_nat_l4proto_udplite);
if (err < 0)
goto err1;
err = nf_nat_l4proto_register(NFPROTO_IPV6, &nf_nat_l4proto_udplite);
if (err < 0)
goto err2;
return 0;
err2:
nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_udplite);
err1:
return err;
} }
static void __exit nf_nat_proto_udplite_fini(void) static void __exit nf_nat_proto_udplite_fini(void)
{ {
nf_nat_protocol_unregister(&nf_nat_protocol_udplite); nf_nat_l4proto_unregister(NFPROTO_IPV6, &nf_nat_l4proto_udplite);
nf_nat_l4proto_unregister(NFPROTO_IPV4, &nf_nat_l4proto_udplite);
} }
module_init(nf_nat_proto_udplite_init); module_init(nf_nat_proto_udplite_init);
......
net/ipv4/netfilter/nf_nat_proto_unknown.c → net/netfilter/nf_nat_proto_unknown.c
View file @ c7232c99
...@@ -15,8 +15,7 @@ ...@@ -15,8 +15,7 @@
#include <linux/netfilter.h> #include <linux/netfilter.h>
#include <net/netfilter/nf_nat.h> #include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_rule.h> #include <net/netfilter/nf_nat_l4proto.h>
#include <net/netfilter/nf_nat_protocol.h>
static bool unknown_in_range(const struct nf_conntrack_tuple *tuple, static bool unknown_in_range(const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type manip_type, enum nf_nat_manip_type manip_type,
...@@ -26,26 +25,29 @@ static bool unknown_in_range(const struct nf_conntrack_tuple *tuple, ...@@ -26,26 +25,29 @@ static bool unknown_in_range(const struct nf_conntrack_tuple *tuple,
return true; return true;
} }
static void unknown_unique_tuple(struct nf_conntrack_tuple *tuple, static void unknown_unique_tuple(const struct nf_nat_l3proto *l3proto,
const struct nf_nat_ipv4_range *range, struct nf_conntrack_tuple *tuple,
const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype, enum nf_nat_manip_type maniptype,
const struct nf_conn *ct) const struct nf_conn *ct)
{ {
/* Sorry: we can't help you; if it's not unique, we can't frob /* Sorry: we can't help you; if it's not unique, we can't frob
anything. */ * anything.
*/
return; return;
} }
static bool static bool
unknown_manip_pkt(struct sk_buff *skb, unknown_manip_pkt(struct sk_buff *skb,
unsigned int iphdroff, const struct nf_nat_l3proto *l3proto,
unsigned int iphdroff, unsigned int hdroff,
const struct nf_conntrack_tuple *tuple, const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype) enum nf_nat_manip_type maniptype)
{ {
return true; return true;
} }
const struct nf_nat_protocol nf_nat_unknown_protocol = { const struct nf_nat_l4proto nf_nat_l4proto_unknown = {
.manip_pkt = unknown_manip_pkt, .manip_pkt = unknown_manip_pkt,
.in_range = unknown_in_range, .in_range = unknown_in_range,
.unique_tuple = unknown_unique_tuple, .unique_tuple = unknown_unique_tuple,
......
net/netfilter/xt_nat.c 0 → 100644
View file @ c7232c99
/*
* (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/module.h>
#include <linux/skbuff.h>
#include <linux/netfilter.h>
#include <linux/netfilter/x_tables.h>
#include <net/netfilter/nf_nat_core.h>
static int xt_nat_checkentry_v0(const struct xt_tgchk_param *par)
{
const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
if (mr->rangesize != 1) {
pr_info("%s: multiple ranges no longer supported\n",
par->target->name);
return -EINVAL;
}
return 0;
}
static void xt_nat_convert_range(struct nf_nat_range *dst,
const struct nf_nat_ipv4_range *src)
{
memset(&dst->min_addr, 0, sizeof(dst->min_addr));
memset(&dst->max_addr, 0, sizeof(dst->max_addr));
dst->flags = src->flags;
dst->min_addr.ip = src->min_ip;
dst->max_addr.ip = src->max_ip;
dst->min_proto = src->min;
dst->max_proto = src->max;
}
static unsigned int
xt_snat_target_v0(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
struct nf_nat_range range;
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
ct = nf_ct_get(skb, &ctinfo);
NF_CT_ASSERT(ct != NULL &&
(ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED ||
ctinfo == IP_CT_RELATED_REPLY));
xt_nat_convert_range(&range, &mr->range[0]);
return nf_nat_setup_info(ct, &range, NF_NAT_MANIP_SRC);
}
static unsigned int
xt_dnat_target_v0(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
struct nf_nat_range range;
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
ct = nf_ct_get(skb, &ctinfo);
NF_CT_ASSERT(ct != NULL &&
(ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED));
xt_nat_convert_range(&range, &mr->range[0]);
return nf_nat_setup_info(ct, &range, NF_NAT_MANIP_DST);
}
static unsigned int
xt_snat_target_v1(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct nf_nat_range *range = par->targinfo;
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
ct = nf_ct_get(skb, &ctinfo);
NF_CT_ASSERT(ct != NULL &&
(ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED ||
ctinfo == IP_CT_RELATED_REPLY));
return nf_nat_setup_info(ct, range, NF_NAT_MANIP_SRC);
}
static unsigned int
xt_dnat_target_v1(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct nf_nat_range *range = par->targinfo;
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
ct = nf_ct_get(skb, &ctinfo);
NF_CT_ASSERT(ct != NULL &&
(ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED));
return nf_nat_setup_info(ct, range, NF_NAT_MANIP_DST);
}
static struct xt_target xt_nat_target_reg[] __read_mostly = {
{
.name = "SNAT",
.revision = 0,
.checkentry = xt_nat_checkentry_v0,
.target = xt_snat_target_v0,
.targetsize = sizeof(struct nf_nat_ipv4_multi_range_compat),
.family = NFPROTO_IPV4,
.table = "nat",
.hooks = (1 << NF_INET_POST_ROUTING) |
(1 << NF_INET_LOCAL_OUT),
.me = THIS_MODULE,
},
{
.name = "DNAT",
.revision = 0,
.checkentry = xt_nat_checkentry_v0,
.target = xt_dnat_target_v0,
.targetsize = sizeof(struct nf_nat_ipv4_multi_range_compat),
.family = NFPROTO_IPV4,
.table = "nat",
.hooks = (1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_LOCAL_IN),
.me = THIS_MODULE,
},
{
.name = "SNAT",
.revision = 1,
.target = xt_snat_target_v1,
.targetsize = sizeof(struct nf_nat_range),
.table = "nat",
.hooks = (1 << NF_INET_POST_ROUTING) |
(1 << NF_INET_LOCAL_OUT),
.me = THIS_MODULE,
},
{
.name = "DNAT",
.revision = 1,
.target = xt_dnat_target_v1,
.targetsize = sizeof(struct nf_nat_range),
.table = "nat",
.hooks = (1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_LOCAL_IN),
.me = THIS_MODULE,
},
};
static int __init xt_nat_init(void)
{
return xt_register_targets(xt_nat_target_reg,
ARRAY_SIZE(xt_nat_target_reg));
}
static void __exit xt_nat_exit(void)
{
xt_unregister_targets(xt_nat_target_reg, ARRAY_SIZE(xt_nat_target_reg));
}
module_init(xt_nat_init);
module_exit(xt_nat_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS("ipt_SNAT");
MODULE_ALIAS("ipt_DNAT");
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