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authorYasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>2005-11-09 19:38:16 -0500
committerDavid S. Miller <davem@davemloft.net>2005-11-09 19:38:16 -0500
commit9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1 (patch)
treec964a62bdd766eca436c30f51a9e33e2b798b0a6 /include/linux
parent6730c3c14421b7c924d06e31bb66e0adad225547 (diff)
[NETFILTER]: Add nf_conntrack subsystem.
The existing connection tracking subsystem in netfilter can only handle ipv4. There were basically two choices present to add connection tracking support for ipv6. We could either duplicate all of the ipv4 connection tracking code into an ipv6 counterpart, or (the choice taken by these patches) we could design a generic layer that could handle both ipv4 and ipv6 and thus requiring only one sub-protocol (TCP, UDP, etc.) connection tracking helper module to be written. In fact nf_conntrack is capable of working with any layer 3 protocol. The existing ipv4 specific conntrack code could also not deal with the pecularities of doing connection tracking on ipv6, which is also cured here. For example, these issues include: 1) ICMPv6 handling, which is used for neighbour discovery in ipv6 thus some messages such as these should not participate in connection tracking since effectively they are like ARP messages 2) fragmentation must be handled differently in ipv6, because the simplistic "defrag, connection track and NAT, refrag" (which the existing ipv4 connection tracking does) approach simply isn't feasible in ipv6 3) ipv6 extension header parsing must occur at the correct spots before and after connection tracking decisions, and there were no provisions for this in the existing connection tracking design 4) ipv6 has no need for stateful NAT The ipv4 specific conntrack layer is kept around, until all of the ipv4 specific conntrack helpers are ported over to nf_conntrack and it is feature complete. Once that occurs, the old conntrack stuff will get placed into the feature-removal-schedule and we will fully kill it off 6 months later. Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp> Signed-off-by: Harald Welte <laforge@netfilter.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/netfilter/nf_conntrack_common.h159
-rw-r--r--include/linux/netfilter/nf_conntrack_ftp.h44
-rw-r--r--include/linux/netfilter/nf_conntrack_sctp.h27
-rw-r--r--include/linux/netfilter/nf_conntrack_tcp.h56
-rw-r--r--include/linux/netfilter/nf_conntrack_tuple_common.h13
-rw-r--r--include/linux/netfilter_ipv4/ip_conntrack.h152
-rw-r--r--include/linux/netfilter_ipv4/ip_conntrack_ftp.h39
-rw-r--r--include/linux/netfilter_ipv4/ip_conntrack_icmp.h9
-rw-r--r--include/linux/netfilter_ipv4/ip_conntrack_sctp.h21
-rw-r--r--include/linux/netfilter_ipv4/ip_conntrack_tcp.h47
-rw-r--r--include/linux/netfilter_ipv4/ip_conntrack_tuple.h10
-rw-r--r--include/linux/netfilter_ipv6.h1
-rw-r--r--include/linux/skbuff.h19
-rw-r--r--include/linux/sysctl.h37
14 files changed, 363 insertions, 271 deletions
diff --git a/include/linux/netfilter/nf_conntrack_common.h b/include/linux/netfilter/nf_conntrack_common.h
new file mode 100644
index 000000000000..6d39b518486b
--- /dev/null
+++ b/include/linux/netfilter/nf_conntrack_common.h
@@ -0,0 +1,159 @@
1#ifndef _NF_CONNTRACK_COMMON_H
2#define _NF_CONNTRACK_COMMON_H
3/* Connection state tracking for netfilter. This is separated from,
4 but required by, the NAT layer; it can also be used by an iptables
5 extension. */
6enum ip_conntrack_info
7{
8 /* Part of an established connection (either direction). */
9 IP_CT_ESTABLISHED,
10
11 /* Like NEW, but related to an existing connection, or ICMP error
12 (in either direction). */
13 IP_CT_RELATED,
14
15 /* Started a new connection to track (only
16 IP_CT_DIR_ORIGINAL); may be a retransmission. */
17 IP_CT_NEW,
18
19 /* >= this indicates reply direction */
20 IP_CT_IS_REPLY,
21
22 /* Number of distinct IP_CT types (no NEW in reply dirn). */
23 IP_CT_NUMBER = IP_CT_IS_REPLY * 2 - 1
24};
25
26/* Bitset representing status of connection. */
27enum ip_conntrack_status {
28 /* It's an expected connection: bit 0 set. This bit never changed */
29 IPS_EXPECTED_BIT = 0,
30 IPS_EXPECTED = (1 << IPS_EXPECTED_BIT),
31
32 /* We've seen packets both ways: bit 1 set. Can be set, not unset. */
33 IPS_SEEN_REPLY_BIT = 1,
34 IPS_SEEN_REPLY = (1 << IPS_SEEN_REPLY_BIT),
35
36 /* Conntrack should never be early-expired. */
37 IPS_ASSURED_BIT = 2,
38 IPS_ASSURED = (1 << IPS_ASSURED_BIT),
39
40 /* Connection is confirmed: originating packet has left box */
41 IPS_CONFIRMED_BIT = 3,
42 IPS_CONFIRMED = (1 << IPS_CONFIRMED_BIT),
43
44 /* Connection needs src nat in orig dir. This bit never changed. */
45 IPS_SRC_NAT_BIT = 4,
46 IPS_SRC_NAT = (1 << IPS_SRC_NAT_BIT),
47
48 /* Connection needs dst nat in orig dir. This bit never changed. */
49 IPS_DST_NAT_BIT = 5,
50 IPS_DST_NAT = (1 << IPS_DST_NAT_BIT),
51
52 /* Both together. */
53 IPS_NAT_MASK = (IPS_DST_NAT | IPS_SRC_NAT),
54
55 /* Connection needs TCP sequence adjusted. */
56 IPS_SEQ_ADJUST_BIT = 6,
57 IPS_SEQ_ADJUST = (1 << IPS_SEQ_ADJUST_BIT),
58
59 /* NAT initialization bits. */
60 IPS_SRC_NAT_DONE_BIT = 7,
61 IPS_SRC_NAT_DONE = (1 << IPS_SRC_NAT_DONE_BIT),
62
63 IPS_DST_NAT_DONE_BIT = 8,
64 IPS_DST_NAT_DONE = (1 << IPS_DST_NAT_DONE_BIT),
65
66 /* Both together */
67 IPS_NAT_DONE_MASK = (IPS_DST_NAT_DONE | IPS_SRC_NAT_DONE),
68
69 /* Connection is dying (removed from lists), can not be unset. */
70 IPS_DYING_BIT = 9,
71 IPS_DYING = (1 << IPS_DYING_BIT),
72};
73
74/* Connection tracking event bits */
75enum ip_conntrack_events
76{
77 /* New conntrack */
78 IPCT_NEW_BIT = 0,
79 IPCT_NEW = (1 << IPCT_NEW_BIT),
80
81 /* Expected connection */
82 IPCT_RELATED_BIT = 1,
83 IPCT_RELATED = (1 << IPCT_RELATED_BIT),
84
85 /* Destroyed conntrack */
86 IPCT_DESTROY_BIT = 2,
87 IPCT_DESTROY = (1 << IPCT_DESTROY_BIT),
88
89 /* Timer has been refreshed */
90 IPCT_REFRESH_BIT = 3,
91 IPCT_REFRESH = (1 << IPCT_REFRESH_BIT),
92
93 /* Status has changed */
94 IPCT_STATUS_BIT = 4,
95 IPCT_STATUS = (1 << IPCT_STATUS_BIT),
96
97 /* Update of protocol info */
98 IPCT_PROTOINFO_BIT = 5,
99 IPCT_PROTOINFO = (1 << IPCT_PROTOINFO_BIT),
100
101 /* Volatile protocol info */
102 IPCT_PROTOINFO_VOLATILE_BIT = 6,
103 IPCT_PROTOINFO_VOLATILE = (1 << IPCT_PROTOINFO_VOLATILE_BIT),
104
105 /* New helper for conntrack */
106 IPCT_HELPER_BIT = 7,
107 IPCT_HELPER = (1 << IPCT_HELPER_BIT),
108
109 /* Update of helper info */
110 IPCT_HELPINFO_BIT = 8,
111 IPCT_HELPINFO = (1 << IPCT_HELPINFO_BIT),
112
113 /* Volatile helper info */
114 IPCT_HELPINFO_VOLATILE_BIT = 9,
115 IPCT_HELPINFO_VOLATILE = (1 << IPCT_HELPINFO_VOLATILE_BIT),
116
117 /* NAT info */
118 IPCT_NATINFO_BIT = 10,
119 IPCT_NATINFO = (1 << IPCT_NATINFO_BIT),
120
121 /* Counter highest bit has been set */
122 IPCT_COUNTER_FILLING_BIT = 11,
123 IPCT_COUNTER_FILLING = (1 << IPCT_COUNTER_FILLING_BIT),
124};
125
126enum ip_conntrack_expect_events {
127 IPEXP_NEW_BIT = 0,
128 IPEXP_NEW = (1 << IPEXP_NEW_BIT),
129};
130
131#ifdef __KERNEL__
132struct ip_conntrack_counter
133{
134 u_int32_t packets;
135 u_int32_t bytes;
136};
137
138struct ip_conntrack_stat
139{
140 unsigned int searched;
141 unsigned int found;
142 unsigned int new;
143 unsigned int invalid;
144 unsigned int ignore;
145 unsigned int delete;
146 unsigned int delete_list;
147 unsigned int insert;
148 unsigned int insert_failed;
149 unsigned int drop;
150 unsigned int early_drop;
151 unsigned int error;
152 unsigned int expect_new;
153 unsigned int expect_create;
154 unsigned int expect_delete;
155};
156
157#endif /* __KERNEL__ */
158
159#endif /* _NF_CONNTRACK_COMMON_H */
diff --git a/include/linux/netfilter/nf_conntrack_ftp.h b/include/linux/netfilter/nf_conntrack_ftp.h
new file mode 100644
index 000000000000..ad4a41c9ce93
--- /dev/null
+++ b/include/linux/netfilter/nf_conntrack_ftp.h
@@ -0,0 +1,44 @@
1#ifndef _NF_CONNTRACK_FTP_H
2#define _NF_CONNTRACK_FTP_H
3/* FTP tracking. */
4
5/* This enum is exposed to userspace */
6enum ip_ct_ftp_type
7{
8 /* PORT command from client */
9 IP_CT_FTP_PORT,
10 /* PASV response from server */
11 IP_CT_FTP_PASV,
12 /* EPRT command from client */
13 IP_CT_FTP_EPRT,
14 /* EPSV response from server */
15 IP_CT_FTP_EPSV,
16};
17
18#ifdef __KERNEL__
19
20#define FTP_PORT 21
21
22#define NUM_SEQ_TO_REMEMBER 2
23/* This structure exists only once per master */
24struct ip_ct_ftp_master {
25 /* Valid seq positions for cmd matching after newline */
26 u_int32_t seq_aft_nl[IP_CT_DIR_MAX][NUM_SEQ_TO_REMEMBER];
27 /* 0 means seq_match_aft_nl not set */
28 int seq_aft_nl_num[IP_CT_DIR_MAX];
29};
30
31struct ip_conntrack_expect;
32
33/* For NAT to hook in when we find a packet which describes what other
34 * connection we should expect. */
35extern unsigned int (*ip_nat_ftp_hook)(struct sk_buff **pskb,
36 enum ip_conntrack_info ctinfo,
37 enum ip_ct_ftp_type type,
38 unsigned int matchoff,
39 unsigned int matchlen,
40 struct ip_conntrack_expect *exp,
41 u32 *seq);
42#endif /* __KERNEL__ */
43
44#endif /* _NF_CONNTRACK_FTP_H */
diff --git a/include/linux/netfilter/nf_conntrack_sctp.h b/include/linux/netfilter/nf_conntrack_sctp.h
new file mode 100644
index 000000000000..b8994d9fd1a9
--- /dev/null
+++ b/include/linux/netfilter/nf_conntrack_sctp.h
@@ -0,0 +1,27 @@
1#ifndef _NF_CONNTRACK_SCTP_H
2#define _NF_CONNTRACK_SCTP_H
3/* SCTP tracking. */
4
5#include <linux/netfilter/nf_conntrack_tuple_common.h>
6
7enum sctp_conntrack {
8 SCTP_CONNTRACK_NONE,
9 SCTP_CONNTRACK_CLOSED,
10 SCTP_CONNTRACK_COOKIE_WAIT,
11 SCTP_CONNTRACK_COOKIE_ECHOED,
12 SCTP_CONNTRACK_ESTABLISHED,
13 SCTP_CONNTRACK_SHUTDOWN_SENT,
14 SCTP_CONNTRACK_SHUTDOWN_RECD,
15 SCTP_CONNTRACK_SHUTDOWN_ACK_SENT,
16 SCTP_CONNTRACK_MAX
17};
18
19struct ip_ct_sctp
20{
21 enum sctp_conntrack state;
22
23 u_int32_t vtag[IP_CT_DIR_MAX];
24 u_int32_t ttag[IP_CT_DIR_MAX];
25};
26
27#endif /* _NF_CONNTRACK_SCTP_H */
diff --git a/include/linux/netfilter/nf_conntrack_tcp.h b/include/linux/netfilter/nf_conntrack_tcp.h
new file mode 100644
index 000000000000..b2feeffde384
--- /dev/null
+++ b/include/linux/netfilter/nf_conntrack_tcp.h
@@ -0,0 +1,56 @@
1#ifndef _NF_CONNTRACK_TCP_H
2#define _NF_CONNTRACK_TCP_H
3/* TCP tracking. */
4
5/* This is exposed to userspace (ctnetlink) */
6enum tcp_conntrack {
7 TCP_CONNTRACK_NONE,
8 TCP_CONNTRACK_SYN_SENT,
9 TCP_CONNTRACK_SYN_RECV,
10 TCP_CONNTRACK_ESTABLISHED,
11 TCP_CONNTRACK_FIN_WAIT,
12 TCP_CONNTRACK_CLOSE_WAIT,
13 TCP_CONNTRACK_LAST_ACK,
14 TCP_CONNTRACK_TIME_WAIT,
15 TCP_CONNTRACK_CLOSE,
16 TCP_CONNTRACK_LISTEN,
17 TCP_CONNTRACK_MAX,
18 TCP_CONNTRACK_IGNORE
19};
20
21/* Window scaling is advertised by the sender */
22#define IP_CT_TCP_FLAG_WINDOW_SCALE 0x01
23
24/* SACK is permitted by the sender */
25#define IP_CT_TCP_FLAG_SACK_PERM 0x02
26
27/* This sender sent FIN first */
28#define IP_CT_TCP_FLAG_CLOSE_INIT 0x03
29
30#ifdef __KERNEL__
31
32struct ip_ct_tcp_state {
33 u_int32_t td_end; /* max of seq + len */
34 u_int32_t td_maxend; /* max of ack + max(win, 1) */
35 u_int32_t td_maxwin; /* max(win) */
36 u_int8_t td_scale; /* window scale factor */
37 u_int8_t loose; /* used when connection picked up from the middle */
38 u_int8_t flags; /* per direction options */
39};
40
41struct ip_ct_tcp
42{
43 struct ip_ct_tcp_state seen[2]; /* connection parameters per direction */
44 u_int8_t state; /* state of the connection (enum tcp_conntrack) */
45 /* For detecting stale connections */
46 u_int8_t last_dir; /* Direction of the last packet (enum ip_conntrack_dir) */
47 u_int8_t retrans; /* Number of retransmitted packets */
48 u_int8_t last_index; /* Index of the last packet */
49 u_int32_t last_seq; /* Last sequence number seen in dir */
50 u_int32_t last_ack; /* Last sequence number seen in opposite dir */
51 u_int32_t last_end; /* Last seq + len */
52};
53
54#endif /* __KERNEL__ */
55
56#endif /* _NF_CONNTRACK_TCP_H */
diff --git a/include/linux/netfilter/nf_conntrack_tuple_common.h b/include/linux/netfilter/nf_conntrack_tuple_common.h
new file mode 100644
index 000000000000..8e145f0d61cb
--- /dev/null
+++ b/include/linux/netfilter/nf_conntrack_tuple_common.h
@@ -0,0 +1,13 @@
1#ifndef _NF_CONNTRACK_TUPLE_COMMON_H
2#define _NF_CONNTRACK_TUPLE_COMMON_H
3
4enum ip_conntrack_dir
5{
6 IP_CT_DIR_ORIGINAL,
7 IP_CT_DIR_REPLY,
8 IP_CT_DIR_MAX
9};
10
11#define CTINFO2DIR(ctinfo) ((ctinfo) >= IP_CT_IS_REPLY ? IP_CT_DIR_REPLY : IP_CT_DIR_ORIGINAL)
12
13#endif /* _NF_CONNTRACK_TUPLE_COMMON_H */
diff --git a/include/linux/netfilter_ipv4/ip_conntrack.h b/include/linux/netfilter_ipv4/ip_conntrack.h
index d078bb91d9e5..b3432ab59a17 100644
--- a/include/linux/netfilter_ipv4/ip_conntrack.h
+++ b/include/linux/netfilter_ipv4/ip_conntrack.h
@@ -1,132 +1,7 @@
1#ifndef _IP_CONNTRACK_H 1#ifndef _IP_CONNTRACK_H
2#define _IP_CONNTRACK_H 2#define _IP_CONNTRACK_H
3/* Connection state tracking for netfilter. This is separated from,
4 but required by, the NAT layer; it can also be used by an iptables
5 extension. */
6enum ip_conntrack_info
7{
8 /* Part of an established connection (either direction). */
9 IP_CT_ESTABLISHED,
10
11 /* Like NEW, but related to an existing connection, or ICMP error
12 (in either direction). */
13 IP_CT_RELATED,
14
15 /* Started a new connection to track (only
16 IP_CT_DIR_ORIGINAL); may be a retransmission. */
17 IP_CT_NEW,
18
19 /* >= this indicates reply direction */
20 IP_CT_IS_REPLY,
21
22 /* Number of distinct IP_CT types (no NEW in reply dirn). */
23 IP_CT_NUMBER = IP_CT_IS_REPLY * 2 - 1
24};
25
26/* Bitset representing status of connection. */
27enum ip_conntrack_status {
28 /* It's an expected connection: bit 0 set. This bit never changed */
29 IPS_EXPECTED_BIT = 0,
30 IPS_EXPECTED = (1 << IPS_EXPECTED_BIT),
31
32 /* We've seen packets both ways: bit 1 set. Can be set, not unset. */
33 IPS_SEEN_REPLY_BIT = 1,
34 IPS_SEEN_REPLY = (1 << IPS_SEEN_REPLY_BIT),
35
36 /* Conntrack should never be early-expired. */
37 IPS_ASSURED_BIT = 2,
38 IPS_ASSURED = (1 << IPS_ASSURED_BIT),
39
40 /* Connection is confirmed: originating packet has left box */
41 IPS_CONFIRMED_BIT = 3,
42 IPS_CONFIRMED = (1 << IPS_CONFIRMED_BIT),
43
44 /* Connection needs src nat in orig dir. This bit never changed. */
45 IPS_SRC_NAT_BIT = 4,
46 IPS_SRC_NAT = (1 << IPS_SRC_NAT_BIT),
47
48 /* Connection needs dst nat in orig dir. This bit never changed. */
49 IPS_DST_NAT_BIT = 5,
50 IPS_DST_NAT = (1 << IPS_DST_NAT_BIT),
51
52 /* Both together. */
53 IPS_NAT_MASK = (IPS_DST_NAT | IPS_SRC_NAT),
54
55 /* Connection needs TCP sequence adjusted. */
56 IPS_SEQ_ADJUST_BIT = 6,
57 IPS_SEQ_ADJUST = (1 << IPS_SEQ_ADJUST_BIT),
58
59 /* NAT initialization bits. */
60 IPS_SRC_NAT_DONE_BIT = 7,
61 IPS_SRC_NAT_DONE = (1 << IPS_SRC_NAT_DONE_BIT),
62
63 IPS_DST_NAT_DONE_BIT = 8,
64 IPS_DST_NAT_DONE = (1 << IPS_DST_NAT_DONE_BIT),
65
66 /* Both together */
67 IPS_NAT_DONE_MASK = (IPS_DST_NAT_DONE | IPS_SRC_NAT_DONE),
68
69 /* Connection is dying (removed from lists), can not be unset. */
70 IPS_DYING_BIT = 9,
71 IPS_DYING = (1 << IPS_DYING_BIT),
72};
73
74/* Connection tracking event bits */
75enum ip_conntrack_events
76{
77 /* New conntrack */
78 IPCT_NEW_BIT = 0,
79 IPCT_NEW = (1 << IPCT_NEW_BIT),
80
81 /* Expected connection */
82 IPCT_RELATED_BIT = 1,
83 IPCT_RELATED = (1 << IPCT_RELATED_BIT),
84
85 /* Destroyed conntrack */
86 IPCT_DESTROY_BIT = 2,
87 IPCT_DESTROY = (1 << IPCT_DESTROY_BIT),
88
89 /* Timer has been refreshed */
90 IPCT_REFRESH_BIT = 3,
91 IPCT_REFRESH = (1 << IPCT_REFRESH_BIT),
92
93 /* Status has changed */
94 IPCT_STATUS_BIT = 4,
95 IPCT_STATUS = (1 << IPCT_STATUS_BIT),
96
97 /* Update of protocol info */
98 IPCT_PROTOINFO_BIT = 5,
99 IPCT_PROTOINFO = (1 << IPCT_PROTOINFO_BIT),
100
101 /* Volatile protocol info */
102 IPCT_PROTOINFO_VOLATILE_BIT = 6,
103 IPCT_PROTOINFO_VOLATILE = (1 << IPCT_PROTOINFO_VOLATILE_BIT),
104
105 /* New helper for conntrack */
106 IPCT_HELPER_BIT = 7,
107 IPCT_HELPER = (1 << IPCT_HELPER_BIT),
108
109 /* Update of helper info */
110 IPCT_HELPINFO_BIT = 8,
111 IPCT_HELPINFO = (1 << IPCT_HELPINFO_BIT),
112
113 /* Volatile helper info */
114 IPCT_HELPINFO_VOLATILE_BIT = 9,
115 IPCT_HELPINFO_VOLATILE = (1 << IPCT_HELPINFO_VOLATILE_BIT),
116 3
117 /* NAT info */ 4#include <linux/netfilter/nf_conntrack_common.h>
118 IPCT_NATINFO_BIT = 10,
119 IPCT_NATINFO = (1 << IPCT_NATINFO_BIT),
120
121 /* Counter highest bit has been set */
122 IPCT_COUNTER_FILLING_BIT = 11,
123 IPCT_COUNTER_FILLING = (1 << IPCT_COUNTER_FILLING_BIT),
124};
125
126enum ip_conntrack_expect_events {
127 IPEXP_NEW_BIT = 0,
128 IPEXP_NEW = (1 << IPEXP_NEW_BIT),
129};
130 5
131#ifdef __KERNEL__ 6#ifdef __KERNEL__
132#include <linux/config.h> 7#include <linux/config.h>
@@ -194,12 +69,6 @@ do { \
194#define IP_NF_ASSERT(x) 69#define IP_NF_ASSERT(x)
195#endif 70#endif
196 71
197struct ip_conntrack_counter
198{
199 u_int32_t packets;
200 u_int32_t bytes;
201};
202
203struct ip_conntrack_helper; 72struct ip_conntrack_helper;
204 73
205struct ip_conntrack 74struct ip_conntrack
@@ -426,25 +295,6 @@ static inline int is_dying(struct ip_conntrack *ct)
426 295
427extern unsigned int ip_conntrack_htable_size; 296extern unsigned int ip_conntrack_htable_size;
428 297
429struct ip_conntrack_stat
430{
431 unsigned int searched;
432 unsigned int found;
433 unsigned int new;
434 unsigned int invalid;
435 unsigned int ignore;
436 unsigned int delete;
437 unsigned int delete_list;
438 unsigned int insert;
439 unsigned int insert_failed;
440 unsigned int drop;
441 unsigned int early_drop;
442 unsigned int error;
443 unsigned int expect_new;
444 unsigned int expect_create;
445 unsigned int expect_delete;
446};
447
448#define CONNTRACK_STAT_INC(count) (__get_cpu_var(ip_conntrack_stat).count++) 298#define CONNTRACK_STAT_INC(count) (__get_cpu_var(ip_conntrack_stat).count++)
449 299
450#ifdef CONFIG_IP_NF_CONNTRACK_EVENTS 300#ifdef CONFIG_IP_NF_CONNTRACK_EVENTS
diff --git a/include/linux/netfilter_ipv4/ip_conntrack_ftp.h b/include/linux/netfilter_ipv4/ip_conntrack_ftp.h
index 5f06429b9047..63811934de4d 100644
--- a/include/linux/netfilter_ipv4/ip_conntrack_ftp.h
+++ b/include/linux/netfilter_ipv4/ip_conntrack_ftp.h
@@ -1,43 +1,6 @@
1#ifndef _IP_CONNTRACK_FTP_H 1#ifndef _IP_CONNTRACK_FTP_H
2#define _IP_CONNTRACK_FTP_H 2#define _IP_CONNTRACK_FTP_H
3/* FTP tracking. */
4 3
5#ifdef __KERNEL__ 4#include <linux/netfilter/nf_conntrack_ftp.h>
6 5
7#define FTP_PORT 21
8
9#endif /* __KERNEL__ */
10
11enum ip_ct_ftp_type
12{
13 /* PORT command from client */
14 IP_CT_FTP_PORT,
15 /* PASV response from server */
16 IP_CT_FTP_PASV,
17 /* EPRT command from client */
18 IP_CT_FTP_EPRT,
19 /* EPSV response from server */
20 IP_CT_FTP_EPSV,
21};
22
23#define NUM_SEQ_TO_REMEMBER 2
24/* This structure exists only once per master */
25struct ip_ct_ftp_master {
26 /* Valid seq positions for cmd matching after newline */
27 u_int32_t seq_aft_nl[IP_CT_DIR_MAX][NUM_SEQ_TO_REMEMBER];
28 /* 0 means seq_match_aft_nl not set */
29 int seq_aft_nl_num[IP_CT_DIR_MAX];
30};
31
32struct ip_conntrack_expect;
33
34/* For NAT to hook in when we find a packet which describes what other
35 * connection we should expect. */
36extern unsigned int (*ip_nat_ftp_hook)(struct sk_buff **pskb,
37 enum ip_conntrack_info ctinfo,
38 enum ip_ct_ftp_type type,
39 unsigned int matchoff,
40 unsigned int matchlen,
41 struct ip_conntrack_expect *exp,
42 u32 *seq);
43#endif /* _IP_CONNTRACK_FTP_H */ 6#endif /* _IP_CONNTRACK_FTP_H */
diff --git a/include/linux/netfilter_ipv4/ip_conntrack_icmp.h b/include/linux/netfilter_ipv4/ip_conntrack_icmp.h
index f1664abbe392..eed5ee3e4744 100644
--- a/include/linux/netfilter_ipv4/ip_conntrack_icmp.h
+++ b/include/linux/netfilter_ipv4/ip_conntrack_icmp.h
@@ -1,11 +1,6 @@
1#ifndef _IP_CONNTRACK_ICMP_H 1#ifndef _IP_CONNTRACK_ICMP_H
2#define _IP_CONNTRACK_ICMP_H 2#define _IP_CONNTRACK_ICMP_H
3/* ICMP tracking. */
4#include <asm/atomic.h>
5 3
6struct ip_ct_icmp 4#include <net/netfilter/ipv4/nf_conntrack_icmp.h>
7{ 5
8 /* Optimization: when number in == number out, forget immediately. */
9 atomic_t count;
10};
11#endif /* _IP_CONNTRACK_ICMP_H */ 6#endif /* _IP_CONNTRACK_ICMP_H */
diff --git a/include/linux/netfilter_ipv4/ip_conntrack_sctp.h b/include/linux/netfilter_ipv4/ip_conntrack_sctp.h
index 7a8d869321f7..4099a041a32a 100644
--- a/include/linux/netfilter_ipv4/ip_conntrack_sctp.h
+++ b/include/linux/netfilter_ipv4/ip_conntrack_sctp.h
@@ -1,25 +1,6 @@
1#ifndef _IP_CONNTRACK_SCTP_H 1#ifndef _IP_CONNTRACK_SCTP_H
2#define _IP_CONNTRACK_SCTP_H 2#define _IP_CONNTRACK_SCTP_H
3/* SCTP tracking. */
4 3
5enum sctp_conntrack { 4#include <linux/netfilter/nf_conntrack_sctp.h>
6 SCTP_CONNTRACK_NONE,
7 SCTP_CONNTRACK_CLOSED,
8 SCTP_CONNTRACK_COOKIE_WAIT,
9 SCTP_CONNTRACK_COOKIE_ECHOED,
10 SCTP_CONNTRACK_ESTABLISHED,
11 SCTP_CONNTRACK_SHUTDOWN_SENT,
12 SCTP_CONNTRACK_SHUTDOWN_RECD,
13 SCTP_CONNTRACK_SHUTDOWN_ACK_SENT,
14 SCTP_CONNTRACK_MAX
15};
16
17struct ip_ct_sctp
18{
19 enum sctp_conntrack state;
20
21 u_int32_t vtag[IP_CT_DIR_MAX];
22 u_int32_t ttag[IP_CT_DIR_MAX];
23};
24 5
25#endif /* _IP_CONNTRACK_SCTP_H */ 6#endif /* _IP_CONNTRACK_SCTP_H */
diff --git a/include/linux/netfilter_ipv4/ip_conntrack_tcp.h b/include/linux/netfilter_ipv4/ip_conntrack_tcp.h
index 16da044d97a7..876b8fb17e68 100644
--- a/include/linux/netfilter_ipv4/ip_conntrack_tcp.h
+++ b/include/linux/netfilter_ipv4/ip_conntrack_tcp.h
@@ -1,51 +1,6 @@
1#ifndef _IP_CONNTRACK_TCP_H 1#ifndef _IP_CONNTRACK_TCP_H
2#define _IP_CONNTRACK_TCP_H 2#define _IP_CONNTRACK_TCP_H
3/* TCP tracking. */
4 3
5enum tcp_conntrack { 4#include <linux/netfilter/nf_conntrack_tcp.h>
6 TCP_CONNTRACK_NONE,
7 TCP_CONNTRACK_SYN_SENT,
8 TCP_CONNTRACK_SYN_RECV,
9 TCP_CONNTRACK_ESTABLISHED,
10 TCP_CONNTRACK_FIN_WAIT,
11 TCP_CONNTRACK_CLOSE_WAIT,
12 TCP_CONNTRACK_LAST_ACK,
13 TCP_CONNTRACK_TIME_WAIT,
14 TCP_CONNTRACK_CLOSE,
15 TCP_CONNTRACK_LISTEN,
16 TCP_CONNTRACK_MAX,
17 TCP_CONNTRACK_IGNORE
18};
19
20/* Window scaling is advertised by the sender */
21#define IP_CT_TCP_FLAG_WINDOW_SCALE 0x01
22
23/* SACK is permitted by the sender */
24#define IP_CT_TCP_FLAG_SACK_PERM 0x02
25
26/* This sender sent FIN first */
27#define IP_CT_TCP_FLAG_CLOSE_INIT 0x03
28
29struct ip_ct_tcp_state {
30 u_int32_t td_end; /* max of seq + len */
31 u_int32_t td_maxend; /* max of ack + max(win, 1) */
32 u_int32_t td_maxwin; /* max(win) */
33 u_int8_t td_scale; /* window scale factor */
34 u_int8_t loose; /* used when connection picked up from the middle */
35 u_int8_t flags; /* per direction options */
36};
37
38struct ip_ct_tcp
39{
40 struct ip_ct_tcp_state seen[2]; /* connection parameters per direction */
41 u_int8_t state; /* state of the connection (enum tcp_conntrack) */
42 /* For detecting stale connections */
43 u_int8_t last_dir; /* Direction of the last packet (enum ip_conntrack_dir) */
44 u_int8_t retrans; /* Number of retransmitted packets */
45 u_int8_t last_index; /* Index of the last packet */
46 u_int32_t last_seq; /* Last sequence number seen in dir */
47 u_int32_t last_ack; /* Last sequence number seen in opposite dir */
48 u_int32_t last_end; /* Last seq + len */
49};
50 5
51#endif /* _IP_CONNTRACK_TCP_H */ 6#endif /* _IP_CONNTRACK_TCP_H */
diff --git a/include/linux/netfilter_ipv4/ip_conntrack_tuple.h b/include/linux/netfilter_ipv4/ip_conntrack_tuple.h
index 3232db11a4e5..2fdabdb4c0ef 100644
--- a/include/linux/netfilter_ipv4/ip_conntrack_tuple.h
+++ b/include/linux/netfilter_ipv4/ip_conntrack_tuple.h
@@ -2,6 +2,7 @@
2#define _IP_CONNTRACK_TUPLE_H 2#define _IP_CONNTRACK_TUPLE_H
3 3
4#include <linux/types.h> 4#include <linux/types.h>
5#include <linux/netfilter/nf_conntrack_tuple_common.h>
5 6
6/* A `tuple' is a structure containing the information to uniquely 7/* A `tuple' is a structure containing the information to uniquely
7 identify a connection. ie. if two packets have the same tuple, they 8 identify a connection. ie. if two packets have the same tuple, they
@@ -88,13 +89,6 @@ struct ip_conntrack_tuple
88 (tuple)->dst.u.all = 0; \ 89 (tuple)->dst.u.all = 0; \
89 } while (0) 90 } while (0)
90 91
91enum ip_conntrack_dir
92{
93 IP_CT_DIR_ORIGINAL,
94 IP_CT_DIR_REPLY,
95 IP_CT_DIR_MAX
96};
97
98#ifdef __KERNEL__ 92#ifdef __KERNEL__
99 93
100#define DUMP_TUPLE(tp) \ 94#define DUMP_TUPLE(tp) \
@@ -103,8 +97,6 @@ DEBUGP("tuple %p: %u %u.%u.%u.%u:%hu -> %u.%u.%u.%u:%hu\n", \
103 NIPQUAD((tp)->src.ip), ntohs((tp)->src.u.all), \ 97 NIPQUAD((tp)->src.ip), ntohs((tp)->src.u.all), \
104 NIPQUAD((tp)->dst.ip), ntohs((tp)->dst.u.all)) 98 NIPQUAD((tp)->dst.ip), ntohs((tp)->dst.u.all))
105 99
106#define CTINFO2DIR(ctinfo) ((ctinfo) >= IP_CT_IS_REPLY ? IP_CT_DIR_REPLY : IP_CT_DIR_ORIGINAL)
107
108/* If we're the first tuple, it's the original dir. */ 100/* If we're the first tuple, it's the original dir. */
109#define DIRECTION(h) ((enum ip_conntrack_dir)(h)->tuple.dst.dir) 101#define DIRECTION(h) ((enum ip_conntrack_dir)(h)->tuple.dst.dir)
110 102
diff --git a/include/linux/netfilter_ipv6.h b/include/linux/netfilter_ipv6.h
index edcc2c6eb5c7..53b2983f6278 100644
--- a/include/linux/netfilter_ipv6.h
+++ b/include/linux/netfilter_ipv6.h
@@ -59,6 +59,7 @@
59 59
60enum nf_ip6_hook_priorities { 60enum nf_ip6_hook_priorities {
61 NF_IP6_PRI_FIRST = INT_MIN, 61 NF_IP6_PRI_FIRST = INT_MIN,
62 NF_IP6_PRI_CONNTRACK_DEFRAG = -400,
62 NF_IP6_PRI_SELINUX_FIRST = -225, 63 NF_IP6_PRI_SELINUX_FIRST = -225,
63 NF_IP6_PRI_CONNTRACK = -200, 64 NF_IP6_PRI_CONNTRACK = -200,
64 NF_IP6_PRI_BRIDGE_SABOTAGE_FORWARD = -175, 65 NF_IP6_PRI_BRIDGE_SABOTAGE_FORWARD = -175,
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index fdfb8fe8c38c..83010231db99 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -274,6 +274,9 @@ struct sk_buff {
274#if defined(CONFIG_IP_VS) || defined(CONFIG_IP_VS_MODULE) 274#if defined(CONFIG_IP_VS) || defined(CONFIG_IP_VS_MODULE)
275 __u8 ipvs_property:1; 275 __u8 ipvs_property:1;
276#endif 276#endif
277#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
278 struct sk_buff *nfct_reasm;
279#endif
277#ifdef CONFIG_BRIDGE_NETFILTER 280#ifdef CONFIG_BRIDGE_NETFILTER
278 struct nf_bridge_info *nf_bridge; 281 struct nf_bridge_info *nf_bridge;
279#endif 282#endif
@@ -1313,10 +1316,26 @@ static inline void nf_conntrack_get(struct nf_conntrack *nfct)
1313 if (nfct) 1316 if (nfct)
1314 atomic_inc(&nfct->use); 1317 atomic_inc(&nfct->use);
1315} 1318}
1319#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
1320static inline void nf_conntrack_get_reasm(struct sk_buff *skb)
1321{
1322 if (skb)
1323 atomic_inc(&skb->users);
1324}
1325static inline void nf_conntrack_put_reasm(struct sk_buff *skb)
1326{
1327 if (skb)
1328 kfree_skb(skb);
1329}
1330#endif
1316static inline void nf_reset(struct sk_buff *skb) 1331static inline void nf_reset(struct sk_buff *skb)
1317{ 1332{
1318 nf_conntrack_put(skb->nfct); 1333 nf_conntrack_put(skb->nfct);
1319 skb->nfct = NULL; 1334 skb->nfct = NULL;
1335#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
1336 nf_conntrack_put_reasm(skb->nfct_reasm);
1337 skb->nfct_reasm = NULL;
1338#endif
1320} 1339}
1321 1340
1322#ifdef CONFIG_BRIDGE_NETFILTER 1341#ifdef CONFIG_BRIDGE_NETFILTER
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index fc131d6602b9..22cf5e1ac987 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -205,6 +205,7 @@ enum
205 NET_ECONET=16, 205 NET_ECONET=16,
206 NET_SCTP=17, 206 NET_SCTP=17,
207 NET_LLC=18, 207 NET_LLC=18,
208 NET_NETFILTER=19,
208}; 209};
209 210
210/* /proc/sys/kernel/random */ 211/* /proc/sys/kernel/random */
@@ -270,6 +271,42 @@ enum
270 NET_UNIX_MAX_DGRAM_QLEN=3, 271 NET_UNIX_MAX_DGRAM_QLEN=3,
271}; 272};
272 273
274/* /proc/sys/net/netfilter */
275enum
276{
277 NET_NF_CONNTRACK_MAX=1,
278 NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT=2,
279 NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV=3,
280 NET_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED=4,
281 NET_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT=5,
282 NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT=6,
283 NET_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK=7,
284 NET_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT=8,
285 NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE=9,
286 NET_NF_CONNTRACK_UDP_TIMEOUT=10,
287 NET_NF_CONNTRACK_UDP_TIMEOUT_STREAM=11,
288 NET_NF_CONNTRACK_ICMP_TIMEOUT=12,
289 NET_NF_CONNTRACK_GENERIC_TIMEOUT=13,
290 NET_NF_CONNTRACK_BUCKETS=14,
291 NET_NF_CONNTRACK_LOG_INVALID=15,
292 NET_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS=16,
293 NET_NF_CONNTRACK_TCP_LOOSE=17,
294 NET_NF_CONNTRACK_TCP_BE_LIBERAL=18,
295 NET_NF_CONNTRACK_TCP_MAX_RETRANS=19,
296 NET_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED=20,
297 NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT=21,
298 NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED=22,
299 NET_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED=23,
300 NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT=24,
301 NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD=25,
302 NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT=26,
303 NET_NF_CONNTRACK_COUNT=27,
304 NET_NF_CONNTRACK_ICMPV6_TIMEOUT=28,
305 NET_NF_CONNTRACK_FRAG6_TIMEOUT=29,
306 NET_NF_CONNTRACK_FRAG6_LOW_THRESH=30,
307 NET_NF_CONNTRACK_FRAG6_HIGH_THRESH=31,
308};
309
273/* /proc/sys/net/ipv4 */ 310/* /proc/sys/net/ipv4 */
274enum 311enum
275{ 312{
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-24 06:09:14 -0500