summaryrefslogtreecommitdiffstats
path: root/include/net
diff options
context:
space:
mode:
Diffstat (limited to 'include/net')
-rw-r--r--include/net/netfilter/nf_conntrack_tuple.h114
-rw-r--r--include/net/netfilter/nf_nat.h54
2 files changed, 168 insertions, 0 deletions
diff --git a/include/net/netfilter/nf_conntrack_tuple.h b/include/net/netfilter/nf_conntrack_tuple.h
new file mode 100644
index 00000000..c40e0b40
--- /dev/null
+++ b/include/net/netfilter/nf_conntrack_tuple.h
@@ -0,0 +1,114 @@
+/* This file was manually copied from the Linux kernel source
+ * and manually stripped from __KERNEL__ sections and unused functions.
+ */
+
+/*
+ * Definitions and Declarations for tuple.
+ *
+ * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
+ * - generalize L3 protocol dependent part.
+ *
+ * Derived from include/linux/netfiter_ipv4/ip_conntrack_tuple.h
+ */
+
+#ifndef _NF_CONNTRACK_TUPLE_H
+#define _NF_CONNTRACK_TUPLE_H
+
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter/nf_conntrack_tuple_common.h>
+
+/* A `tuple' is a structure containing the information to uniquely
+ identify a connection. ie. if two packets have the same tuple, they
+ are in the same connection; if not, they are not.
+
+ We divide the structure along "manipulatable" and
+ "non-manipulatable" lines, for the benefit of the NAT code.
+*/
+
+#define NF_CT_TUPLE_L3SIZE ARRAY_SIZE(((union nf_inet_addr *)NULL)->all)
+
+/* The protocol-specific manipulable parts of the tuple: always in
+ network order! */
+union nf_conntrack_man_proto
+{
+ /* Add other protocols here. */
+ __be16 all;
+
+ struct {
+ __be16 port;
+ } tcp;
+ struct {
+ __be16 port;
+ } udp;
+ struct {
+ __be16 id;
+ } icmp;
+ struct {
+ __be16 port;
+ } dccp;
+ struct {
+ __be16 port;
+ } sctp;
+ struct {
+ __be16 key; /* GRE key is 32bit, PPtP only uses 16bit */
+ } gre;
+};
+
+/* The manipulable part of the tuple. */
+struct nf_conntrack_man
+{
+ union nf_inet_addr u3;
+ union nf_conntrack_man_proto u;
+ /* Layer 3 protocol */
+ u_int16_t l3num;
+};
+
+/* This contains the information to distinguish a connection. */
+struct nf_conntrack_tuple
+{
+ struct nf_conntrack_man src;
+
+ /* These are the parts of the tuple which are fixed. */
+ struct {
+ union nf_inet_addr u3;
+ union {
+ /* Add other protocols here. */
+ __be16 all;
+
+ struct {
+ __be16 port;
+ } tcp;
+ struct {
+ __be16 port;
+ } udp;
+ struct {
+ u_int8_t type, code;
+ } icmp;
+ struct {
+ __be16 port;
+ } dccp;
+ struct {
+ __be16 port;
+ } sctp;
+ struct {
+ __be16 key;
+ } gre;
+ } u;
+
+ /* The protocol. */
+ u_int8_t protonum;
+
+ /* The direction (for tuplehash) */
+ u_int8_t dir;
+ } dst;
+};
+
+struct nf_conntrack_tuple_mask
+{
+ struct {
+ union nf_inet_addr u3;
+ union nf_conntrack_man_proto u;
+ } src;
+};
+
+#endif /* _NF_CONNTRACK_TUPLE_H */
diff --git a/include/net/netfilter/nf_nat.h b/include/net/netfilter/nf_nat.h
new file mode 100644
index 00000000..094473e4
--- /dev/null
+++ b/include/net/netfilter/nf_nat.h
@@ -0,0 +1,54 @@
+#ifndef _NF_NAT_H
+#define _NF_NAT_H
+#include <linux/netfilter_ipv4.h>
+#include <net/netfilter/nf_conntrack_tuple.h>
+
+#define NF_NAT_MAPPING_TYPE_MAX_NAMELEN 16
+
+enum nf_nat_manip_type
+{
+ IP_NAT_MANIP_SRC,
+ IP_NAT_MANIP_DST
+};
+
+/* SRC manip occurs POST_ROUTING or LOCAL_IN */
+#define HOOK2MANIP(hooknum) ((hooknum) != NF_INET_POST_ROUTING && \
+ (hooknum) != NF_INET_LOCAL_IN)
+
+#define IP_NAT_RANGE_MAP_IPS 1
+#define IP_NAT_RANGE_PROTO_SPECIFIED 2
+#define IP_NAT_RANGE_PROTO_RANDOM 4
+
+/* NAT sequence number modifications */
+struct nf_nat_seq {
+ /* position of the last TCP sequence number modification (if any) */
+ u_int32_t correction_pos;
+
+ /* sequence number offset before and after last modification */
+ int16_t offset_before, offset_after;
+};
+
+/* Single range specification. */
+struct nf_nat_range
+{
+ /* Set to OR of flags above. */
+ unsigned int flags;
+
+ /* Inclusive: network order. */
+ __be32 min_ip, max_ip;
+
+ /* Inclusive: network order */
+ union nf_conntrack_man_proto min, max;
+};
+
+/* For backwards compat: don't use in modern code. */
+struct nf_nat_multi_range_compat
+{
+ unsigned int rangesize; /* Must be 1. */
+
+ /* hangs off end. */
+ struct nf_nat_range range[1];
+};
+
+#define nf_nat_multi_range nf_nat_multi_range_compat
+#endif