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Diffstat (limited to 'include/linux/netfilter/nf_conntrack_common.h')
-rw-r--r--include/linux/netfilter/nf_conntrack_common.h152
1 files changed, 152 insertions, 0 deletions
diff --git a/include/linux/netfilter/nf_conntrack_common.h b/include/linux/netfilter/nf_conntrack_common.h
new file mode 100644
index 00000000..27a18952
--- /dev/null
+++ b/include/linux/netfilter/nf_conntrack_common.h
@@ -0,0 +1,152 @@
+#ifndef _NF_CONNTRACK_COMMON_H
+#define _NF_CONNTRACK_COMMON_H
+/* Connection state tracking for netfilter. This is separated from,
+ but required by, the NAT layer; it can also be used by an iptables
+ extension. */
+enum ip_conntrack_info
+{
+ /* Part of an established connection (either direction). */
+ IP_CT_ESTABLISHED,
+
+ /* Like NEW, but related to an existing connection, or ICMP error
+ (in either direction). */
+ IP_CT_RELATED,
+
+ /* Started a new connection to track (only
+ IP_CT_DIR_ORIGINAL); may be a retransmission. */
+ IP_CT_NEW,
+
+ /* >= this indicates reply direction */
+ IP_CT_IS_REPLY,
+
+ /* Number of distinct IP_CT types (no NEW in reply dirn). */
+ IP_CT_NUMBER = IP_CT_IS_REPLY * 2 - 1
+};
+
+#define NF_CT_STATE_INVALID_BIT (1 << 0)
+#define NF_CT_STATE_BIT(ctinfo) (1 << ((ctinfo) % IP_CT_IS_REPLY + 1))
+#define NF_CT_STATE_UNTRACKED_BIT (1 << (IP_CT_NUMBER + 1))
+
+/* Bitset representing status of connection. */
+enum ip_conntrack_status {
+ /* It's an expected connection: bit 0 set. This bit never changed */
+ IPS_EXPECTED_BIT = 0,
+ IPS_EXPECTED = (1 << IPS_EXPECTED_BIT),
+
+ /* We've seen packets both ways: bit 1 set. Can be set, not unset. */
+ IPS_SEEN_REPLY_BIT = 1,
+ IPS_SEEN_REPLY = (1 << IPS_SEEN_REPLY_BIT),
+
+ /* Conntrack should never be early-expired. */
+ IPS_ASSURED_BIT = 2,
+ IPS_ASSURED = (1 << IPS_ASSURED_BIT),
+
+ /* Connection is confirmed: originating packet has left box */
+ IPS_CONFIRMED_BIT = 3,
+ IPS_CONFIRMED = (1 << IPS_CONFIRMED_BIT),
+
+ /* Connection needs src nat in orig dir. This bit never changed. */
+ IPS_SRC_NAT_BIT = 4,
+ IPS_SRC_NAT = (1 << IPS_SRC_NAT_BIT),
+
+ /* Connection needs dst nat in orig dir. This bit never changed. */
+ IPS_DST_NAT_BIT = 5,
+ IPS_DST_NAT = (1 << IPS_DST_NAT_BIT),
+
+ /* Both together. */
+ IPS_NAT_MASK = (IPS_DST_NAT | IPS_SRC_NAT),
+
+ /* Connection needs TCP sequence adjusted. */
+ IPS_SEQ_ADJUST_BIT = 6,
+ IPS_SEQ_ADJUST = (1 << IPS_SEQ_ADJUST_BIT),
+
+ /* NAT initialization bits. */
+ IPS_SRC_NAT_DONE_BIT = 7,
+ IPS_SRC_NAT_DONE = (1 << IPS_SRC_NAT_DONE_BIT),
+
+ IPS_DST_NAT_DONE_BIT = 8,
+ IPS_DST_NAT_DONE = (1 << IPS_DST_NAT_DONE_BIT),
+
+ /* Both together */
+ IPS_NAT_DONE_MASK = (IPS_DST_NAT_DONE | IPS_SRC_NAT_DONE),
+
+ /* Connection is dying (removed from lists), can not be unset. */
+ IPS_DYING_BIT = 9,
+ IPS_DYING = (1 << IPS_DYING_BIT),
+
+ /* Connection has fixed timeout. */
+ IPS_FIXED_TIMEOUT_BIT = 10,
+ IPS_FIXED_TIMEOUT = (1 << IPS_FIXED_TIMEOUT_BIT),
+};
+
+/* Connection tracking event bits */
+enum ip_conntrack_events
+{
+ /* New conntrack */
+ IPCT_NEW_BIT = 0,
+ IPCT_NEW = (1 << IPCT_NEW_BIT),
+
+ /* Expected connection */
+ IPCT_RELATED_BIT = 1,
+ IPCT_RELATED = (1 << IPCT_RELATED_BIT),
+
+ /* Destroyed conntrack */
+ IPCT_DESTROY_BIT = 2,
+ IPCT_DESTROY = (1 << IPCT_DESTROY_BIT),
+
+ /* Timer has been refreshed */
+ IPCT_REFRESH_BIT = 3,
+ IPCT_REFRESH = (1 << IPCT_REFRESH_BIT),
+
+ /* Status has changed */
+ IPCT_STATUS_BIT = 4,
+ IPCT_STATUS = (1 << IPCT_STATUS_BIT),
+
+ /* Update of protocol info */
+ IPCT_PROTOINFO_BIT = 5,
+ IPCT_PROTOINFO = (1 << IPCT_PROTOINFO_BIT),
+
+ /* Volatile protocol info */
+ IPCT_PROTOINFO_VOLATILE_BIT = 6,
+ IPCT_PROTOINFO_VOLATILE = (1 << IPCT_PROTOINFO_VOLATILE_BIT),
+
+ /* New helper for conntrack */
+ IPCT_HELPER_BIT = 7,
+ IPCT_HELPER = (1 << IPCT_HELPER_BIT),
+
+ /* Update of helper info */
+ IPCT_HELPINFO_BIT = 8,
+ IPCT_HELPINFO = (1 << IPCT_HELPINFO_BIT),
+
+ /* Volatile helper info */
+ IPCT_HELPINFO_VOLATILE_BIT = 9,
+ IPCT_HELPINFO_VOLATILE = (1 << IPCT_HELPINFO_VOLATILE_BIT),
+
+ /* NAT info */
+ IPCT_NATINFO_BIT = 10,
+ IPCT_NATINFO = (1 << IPCT_NATINFO_BIT),
+
+ /* Counter highest bit has been set, unused */
+ IPCT_COUNTER_FILLING_BIT = 11,
+ IPCT_COUNTER_FILLING = (1 << IPCT_COUNTER_FILLING_BIT),
+
+ /* Mark is set */
+ IPCT_MARK_BIT = 12,
+ IPCT_MARK = (1 << IPCT_MARK_BIT),
+
+ /* NAT sequence adjustment */
+ IPCT_NATSEQADJ_BIT = 13,
+ IPCT_NATSEQADJ = (1 << IPCT_NATSEQADJ_BIT),
+
+ /* Secmark is set */
+ IPCT_SECMARK_BIT = 14,
+ IPCT_SECMARK = (1 << IPCT_SECMARK_BIT),
+};
+
+enum ip_conntrack_expect_events {
+ IPEXP_NEW_BIT = 0,
+ IPEXP_NEW = (1 << IPEXP_NEW_BIT),
+};
+
+
+#endif /* _NF_CONNTRACK_COMMON_H */