diff options
author | Patrick McHardy <kaber@trash.net> | 2012-08-26 17:14:06 (GMT) |
---|---|---|
committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2012-08-30 01:00:14 (GMT) |
commit | c7232c9979cba684c50b64c513c4a83c9aa70563 (patch) | |
tree | dbe0fdac62191d85935f5a3dfe815c1b1add60f9 /include | |
parent | 051966c0c644a1c96092d4206e00704ade813c9a (diff) | |
download | linux-fsl-qoriq-c7232c9979cba684c50b64c513c4a83c9aa70563.tar.xz |
netfilter: add protocol independent NAT core
Convert the IPv4 NAT implementation to a protocol independent core and
address family specific modules.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/netfilter.h | 14 | ||||
-rw-r--r-- | include/linux/netfilter/nf_nat.h | 8 | ||||
-rw-r--r-- | include/linux/netfilter/nfnetlink_conntrack.h | 6 | ||||
-rw-r--r-- | include/linux/netfilter_ipv4.h | 1 | ||||
-rw-r--r-- | include/net/netfilter/nf_conntrack_expect.h | 2 | ||||
-rw-r--r-- | include/net/netfilter/nf_nat.h | 2 | ||||
-rw-r--r-- | include/net/netfilter/nf_nat_core.h | 5 | ||||
-rw-r--r-- | include/net/netfilter/nf_nat_l3proto.h | 47 | ||||
-rw-r--r-- | include/net/netfilter/nf_nat_l4proto.h | 71 | ||||
-rw-r--r-- | include/net/netfilter/nf_nat_protocol.h | 67 | ||||
-rw-r--r-- | include/net/netfilter/nf_nat_rule.h | 15 | ||||
-rw-r--r-- | include/net/netns/conntrack.h | 4 | ||||
-rw-r--r-- | include/net/netns/ipv4.h | 2 |
13 files changed, 143 insertions, 101 deletions
diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h index c613cf0..1dcf2a3 100644 --- a/include/linux/netfilter.h +++ b/include/linux/netfilter.h @@ -342,7 +342,7 @@ extern int nf_register_afinfo(const struct nf_afinfo *afinfo); extern void nf_unregister_afinfo(const struct nf_afinfo *afinfo); #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 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 void (*decodefn)(struct sk_buff *, struct flowi *); - if (family == AF_INET) { - rcu_read_lock(); - decodefn = rcu_dereference(ip_nat_decode_session); - if (decodefn) - decodefn(skb, fl); - rcu_read_unlock(); - } + rcu_read_lock(); + decodefn = rcu_dereference(nf_nat_decode_session_hook); + if (decodefn) + decodefn(skb, fl); + rcu_read_unlock(); #endif } diff --git a/include/linux/netfilter/nf_nat.h b/include/linux/netfilter/nf_nat.h index 8df2d13..bf0cc37 100644 --- a/include/linux/netfilter/nf_nat.h +++ b/include/linux/netfilter/nf_nat.h @@ -22,4 +22,12 @@ struct nf_nat_ipv4_multi_range_compat { 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 */ diff --git a/include/linux/netfilter/nfnetlink_conntrack.h b/include/linux/netfilter/nfnetlink_conntrack.h index f649f74..68920ea 100644 --- a/include/linux/netfilter/nfnetlink_conntrack.h +++ b/include/linux/netfilter/nfnetlink_conntrack.h @@ -142,8 +142,10 @@ enum ctattr_tstamp { enum ctattr_nat { CTA_NAT_UNSPEC, - CTA_NAT_MINIP, - CTA_NAT_MAXIP, + CTA_NAT_V4_MINIP, +#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_MAX }; diff --git a/include/linux/netfilter_ipv4.h b/include/linux/netfilter_ipv4.h index e2b1280..b962dfc 100644 --- a/include/linux/netfilter_ipv4.h +++ b/include/linux/netfilter_ipv4.h @@ -79,7 +79,6 @@ enum nf_ip_hook_priorities { #ifdef __KERNEL__ 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, unsigned int dataoff, u_int8_t protocol); #endif /*__KERNEL__*/ diff --git a/include/net/netfilter/nf_conntrack_expect.h b/include/net/netfilter/nf_conntrack_expect.h index 983f002..cc13f37 100644 --- a/include/net/netfilter/nf_conntrack_expect.h +++ b/include/net/netfilter/nf_conntrack_expect.h @@ -43,7 +43,7 @@ struct nf_conntrack_expect { unsigned int class; #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 * expected connection the way the recipient expects. */ union nf_conntrack_man_proto saved_proto; diff --git a/include/net/netfilter/nf_nat.h b/include/net/netfilter/nf_nat.h index b4de990..1752f133 100644 --- a/include/net/netfilter/nf_nat.h +++ b/include/net/netfilter/nf_nat.h @@ -50,7 +50,7 @@ struct nf_conn_nat { /* Set up the info structure to map into this range. */ 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); /* Is this tuple already taken? (not by us)*/ diff --git a/include/net/netfilter/nf_nat_core.h b/include/net/netfilter/nf_nat_core.h index b13d8d1..972e1e4 100644 --- a/include/net/netfilter/nf_nat_core.h +++ b/include/net/netfilter/nf_nat_core.h @@ -12,10 +12,7 @@ extern unsigned int nf_nat_packet(struct nf_conn *ct, unsigned int hooknum, struct sk_buff *skb); -extern int nf_nat_icmp_reply_translation(struct nf_conn *ct, - enum ip_conntrack_info ctinfo, - unsigned int hooknum, - struct sk_buff *skb); +extern int nf_xfrm_me_harder(struct sk_buff *skb, unsigned int family); static inline int nf_nat_initialized(struct nf_conn *ct, enum nf_nat_manip_type manip) diff --git a/include/net/netfilter/nf_nat_l3proto.h b/include/net/netfilter/nf_nat_l3proto.h new file mode 100644 index 0000000..beed969 --- /dev/null +++ b/include/net/netfilter/nf_nat_l3proto.h @@ -0,0 +1,47 @@ +#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 */ diff --git a/include/net/netfilter/nf_nat_l4proto.h b/include/net/netfilter/nf_nat_l4proto.h new file mode 100644 index 0000000..1f0a4f0 --- /dev/null +++ b/include/net/netfilter/nf_nat_l4proto.h @@ -0,0 +1,71 @@ +/* Header for use in defining a given protocol. */ +#ifndef _NF_NAT_L4PROTO_H +#define _NF_NAT_L4PROTO_H +#include <net/netfilter/nf_nat.h> +#include <linux/netfilter/nfnetlink_conntrack.h> + +struct nf_nat_range; +struct nf_nat_l3proto; + +struct nf_nat_l4proto { + /* Protocol number. */ + u8 l4proto; + + /* Translate a packet to the target according to manip type. + * Return true if succeeded. + */ + bool (*manip_pkt)(struct sk_buff *skb, + const struct nf_nat_l3proto *l3proto, + unsigned int iphdroff, unsigned int hdroff, + const struct nf_conntrack_tuple *tuple, + enum nf_nat_manip_type maniptype); + + /* Is the manipable part of the tuple between min and max incl? */ + bool (*in_range)(const struct nf_conntrack_tuple *tuple, + enum nf_nat_manip_type maniptype, + const union nf_conntrack_man_proto *min, + const union nf_conntrack_man_proto *max); + + /* Alter the per-proto part of the tuple (depending on + * maniptype), to give a unique tuple in the given range if + * possible. Per-protocol part of tuple is initialized to the + * incoming packet. + */ + 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, + const struct nf_conn *ct); + + int (*nlattr_to_range)(struct nlattr *tb[], + struct nf_nat_range *range); +}; + +/* Protocol registration. */ +extern int nf_nat_l4proto_register(u8 l3proto, const struct nf_nat_l4proto *l4proto); +extern void nf_nat_l4proto_unregister(u8 l3proto, const struct nf_nat_l4proto *l4proto); + +extern const struct nf_nat_l4proto *__nf_nat_l4proto_find(u8 l3proto, u8 l4proto); + +/* Built-in protocols. */ +extern const struct nf_nat_l4proto nf_nat_l4proto_tcp; +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_l4proto_in_range(const struct nf_conntrack_tuple *tuple, + enum nf_nat_manip_type maniptype, + const union nf_conntrack_man_proto *min, + const union nf_conntrack_man_proto *max); + +extern void nf_nat_l4proto_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, + const struct nf_conn *ct, + u16 *rover); + +extern int nf_nat_l4proto_nlattr_to_range(struct nlattr *tb[], + struct nf_nat_range *range); + +#endif /*_NF_NAT_L4PROTO_H*/ diff --git a/include/net/netfilter/nf_nat_protocol.h b/include/net/netfilter/nf_nat_protocol.h deleted file mode 100644 index 7b0b511..0000000 --- a/include/net/netfilter/nf_nat_protocol.h +++ /dev/null @@ -1,67 +0,0 @@ -/* Header for use in defining a given protocol. */ -#ifndef _NF_NAT_PROTOCOL_H -#define _NF_NAT_PROTOCOL_H -#include <net/netfilter/nf_nat.h> -#include <linux/netfilter/nfnetlink_conntrack.h> - -struct nf_nat_ipv4_range; - -struct nf_nat_protocol { - /* Protocol number. */ - unsigned int protonum; - - /* Translate a packet to the target according to manip type. - Return true if succeeded. */ - bool (*manip_pkt)(struct sk_buff *skb, - unsigned int iphdroff, - const struct nf_conntrack_tuple *tuple, - enum nf_nat_manip_type maniptype); - - /* Is the manipable part of the tuple between min and max incl? */ - bool (*in_range)(const struct nf_conntrack_tuple *tuple, - enum nf_nat_manip_type maniptype, - const union nf_conntrack_man_proto *min, - const union nf_conntrack_man_proto *max); - - /* Alter the per-proto part of the tuple (depending on - maniptype), to give a unique tuple in the given range if - possible. Per-protocol part of tuple is initialized to the - incoming packet. */ - void (*unique_tuple)(struct nf_conntrack_tuple *tuple, - const struct nf_nat_ipv4_range *range, - enum nf_nat_manip_type maniptype, - const struct nf_conn *ct); - - int (*nlattr_to_range)(struct nlattr *tb[], - struct nf_nat_ipv4_range *range); -}; - -/* Protocol registration. */ -extern int nf_nat_protocol_register(const struct nf_nat_protocol *proto); -extern void nf_nat_protocol_unregister(const struct nf_nat_protocol *proto); - -/* Built-in protocols. */ -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; -extern void cleanup_protocols(void); -extern const struct nf_nat_protocol *find_nat_proto(u_int16_t protonum); - -extern bool nf_nat_proto_in_range(const struct nf_conntrack_tuple *tuple, - enum nf_nat_manip_type maniptype, - const union nf_conntrack_man_proto *min, - const union nf_conntrack_man_proto *max); - -extern void nf_nat_proto_unique_tuple(struct nf_conntrack_tuple *tuple, - const struct nf_nat_ipv4_range *range, - enum nf_nat_manip_type maniptype, - const struct nf_conn *ct, - u_int16_t *rover); - -extern int nf_nat_proto_nlattr_to_range(struct nlattr *tb[], - struct nf_nat_ipv4_range *range); - -#endif /*_NF_NAT_PROTO_H*/ diff --git a/include/net/netfilter/nf_nat_rule.h b/include/net/netfilter/nf_nat_rule.h deleted file mode 100644 index 2890bdc..0000000 --- a/include/net/netfilter/nf_nat_rule.h +++ /dev/null @@ -1,15 +0,0 @@ -#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 */ diff --git a/include/net/netns/conntrack.h b/include/net/netns/conntrack.h index 3aecdc7..a1d83cc 100644 --- a/include/net/netns/conntrack.h +++ b/include/net/netns/conntrack.h @@ -83,6 +83,10 @@ struct netns_ct { int sysctl_auto_assign_helper; bool auto_assign_helper_warned; 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 struct ctl_table_header *sysctl_header; struct ctl_table_header *acct_sysctl_header; diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h index 1474dd6..ace280d 100644 --- a/include/net/netns/ipv4.h +++ b/include/net/netns/ipv4.h @@ -51,8 +51,6 @@ struct netns_ipv4 { struct xt_table *iptable_security; #endif struct xt_table *nat_table; - struct hlist_head *nat_bysource; - unsigned int nat_htable_size; #endif int sysctl_icmp_echo_ignore_all; |