![Eric Leblond](/assets/img/avatar_default.png)
Add a flag in a connection status to have a non updated timeout. This permits to have connection that automatically die at a given time. Signed-off-by: Eric Leblond <eric@inl.fr> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
167 lines
4.2 KiB
C
167 lines
4.2 KiB
C
#ifndef _NF_CONNTRACK_COMMON_H
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#define _NF_CONNTRACK_COMMON_H
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/* Connection state tracking for netfilter. This is separated from,
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but required by, the NAT layer; it can also be used by an iptables
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extension. */
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enum ip_conntrack_info
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{
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/* Part of an established connection (either direction). */
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IP_CT_ESTABLISHED,
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/* Like NEW, but related to an existing connection, or ICMP error
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(in either direction). */
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IP_CT_RELATED,
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/* Started a new connection to track (only
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IP_CT_DIR_ORIGINAL); may be a retransmission. */
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IP_CT_NEW,
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/* >= this indicates reply direction */
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IP_CT_IS_REPLY,
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/* Number of distinct IP_CT types (no NEW in reply dirn). */
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IP_CT_NUMBER = IP_CT_IS_REPLY * 2 - 1
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};
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/* Bitset representing status of connection. */
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enum ip_conntrack_status {
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/* It's an expected connection: bit 0 set. This bit never changed */
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IPS_EXPECTED_BIT = 0,
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IPS_EXPECTED = (1 << IPS_EXPECTED_BIT),
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/* We've seen packets both ways: bit 1 set. Can be set, not unset. */
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IPS_SEEN_REPLY_BIT = 1,
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IPS_SEEN_REPLY = (1 << IPS_SEEN_REPLY_BIT),
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/* Conntrack should never be early-expired. */
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IPS_ASSURED_BIT = 2,
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IPS_ASSURED = (1 << IPS_ASSURED_BIT),
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/* Connection is confirmed: originating packet has left box */
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IPS_CONFIRMED_BIT = 3,
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IPS_CONFIRMED = (1 << IPS_CONFIRMED_BIT),
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/* Connection needs src nat in orig dir. This bit never changed. */
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IPS_SRC_NAT_BIT = 4,
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IPS_SRC_NAT = (1 << IPS_SRC_NAT_BIT),
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/* Connection needs dst nat in orig dir. This bit never changed. */
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IPS_DST_NAT_BIT = 5,
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IPS_DST_NAT = (1 << IPS_DST_NAT_BIT),
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/* Both together. */
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IPS_NAT_MASK = (IPS_DST_NAT | IPS_SRC_NAT),
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/* Connection needs TCP sequence adjusted. */
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IPS_SEQ_ADJUST_BIT = 6,
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IPS_SEQ_ADJUST = (1 << IPS_SEQ_ADJUST_BIT),
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/* NAT initialization bits. */
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IPS_SRC_NAT_DONE_BIT = 7,
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IPS_SRC_NAT_DONE = (1 << IPS_SRC_NAT_DONE_BIT),
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IPS_DST_NAT_DONE_BIT = 8,
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IPS_DST_NAT_DONE = (1 << IPS_DST_NAT_DONE_BIT),
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/* Both together */
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IPS_NAT_DONE_MASK = (IPS_DST_NAT_DONE | IPS_SRC_NAT_DONE),
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/* Connection is dying (removed from lists), can not be unset. */
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IPS_DYING_BIT = 9,
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IPS_DYING = (1 << IPS_DYING_BIT),
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/* Connection has fixed timeout. */
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IPS_FIXED_TIMEOUT_BIT = 10,
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IPS_FIXED_TIMEOUT = (1 << IPS_FIXED_TIMEOUT_BIT),
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};
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/* Connection tracking event bits */
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enum ip_conntrack_events
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{
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/* New conntrack */
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IPCT_NEW_BIT = 0,
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IPCT_NEW = (1 << IPCT_NEW_BIT),
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/* Expected connection */
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IPCT_RELATED_BIT = 1,
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IPCT_RELATED = (1 << IPCT_RELATED_BIT),
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/* Destroyed conntrack */
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IPCT_DESTROY_BIT = 2,
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IPCT_DESTROY = (1 << IPCT_DESTROY_BIT),
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/* Timer has been refreshed */
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IPCT_REFRESH_BIT = 3,
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IPCT_REFRESH = (1 << IPCT_REFRESH_BIT),
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/* Status has changed */
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IPCT_STATUS_BIT = 4,
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IPCT_STATUS = (1 << IPCT_STATUS_BIT),
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/* Update of protocol info */
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IPCT_PROTOINFO_BIT = 5,
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IPCT_PROTOINFO = (1 << IPCT_PROTOINFO_BIT),
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/* Volatile protocol info */
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IPCT_PROTOINFO_VOLATILE_BIT = 6,
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IPCT_PROTOINFO_VOLATILE = (1 << IPCT_PROTOINFO_VOLATILE_BIT),
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/* New helper for conntrack */
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IPCT_HELPER_BIT = 7,
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IPCT_HELPER = (1 << IPCT_HELPER_BIT),
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/* Update of helper info */
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IPCT_HELPINFO_BIT = 8,
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IPCT_HELPINFO = (1 << IPCT_HELPINFO_BIT),
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/* Volatile helper info */
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IPCT_HELPINFO_VOLATILE_BIT = 9,
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IPCT_HELPINFO_VOLATILE = (1 << IPCT_HELPINFO_VOLATILE_BIT),
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/* NAT info */
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IPCT_NATINFO_BIT = 10,
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IPCT_NATINFO = (1 << IPCT_NATINFO_BIT),
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/* Counter highest bit has been set */
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IPCT_COUNTER_FILLING_BIT = 11,
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IPCT_COUNTER_FILLING = (1 << IPCT_COUNTER_FILLING_BIT),
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};
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enum ip_conntrack_expect_events {
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IPEXP_NEW_BIT = 0,
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IPEXP_NEW = (1 << IPEXP_NEW_BIT),
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};
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#ifdef __KERNEL__
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struct ip_conntrack_counter
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{
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u_int32_t packets;
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u_int32_t bytes;
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};
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struct ip_conntrack_stat
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{
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unsigned int searched;
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unsigned int found;
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unsigned int new;
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unsigned int invalid;
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unsigned int ignore;
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unsigned int delete;
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unsigned int delete_list;
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unsigned int insert;
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unsigned int insert_failed;
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unsigned int drop;
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unsigned int early_drop;
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unsigned int error;
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unsigned int expect_new;
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unsigned int expect_create;
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unsigned int expect_delete;
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};
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/* call to create an explicit dependency on nf_conntrack. */
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extern void need_conntrack(void);
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#endif /* __KERNEL__ */
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#endif /* _NF_CONNTRACK_COMMON_H */
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