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authorJing Min Zhao <zhaojingmin@users.sourceforge.net>2006-04-06 17:13:42 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2006-04-10 01:25:35 -0400
commit48bfee5fad0e46f4f18d46285efceba39e897482 (patch)
treef527020c7163d519fdc6fd6d38f9473b6ce739bf /include/linux
parent32292a7ff1d9306841a8da6ea286847b1070cc6a (diff)
[NETFILTER]: H.323 helper: move some function prototypes to ip_conntrack_h323.h
Move prototypes of NAT callbacks to ip_conntrack_h323.h. Because the use of typedefs as arguments, some header files need to be moved as well. Signed-off-by: Jing Min Zhao <zhaojingmin@users.sourceforge.net> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/netfilter_ipv4/ip_conntrack_h323.h52
-rw-r--r--include/linux/netfilter_ipv4/ip_conntrack_helper_h323_asn1.h98
-rw-r--r--include/linux/netfilter_ipv4/ip_conntrack_helper_h323_types.h938
3 files changed, 1088 insertions, 0 deletions
diff --git a/include/linux/netfilter_ipv4/ip_conntrack_h323.h b/include/linux/netfilter_ipv4/ip_conntrack_h323.h
index 0987cea538..eace86bd2a 100644
--- a/include/linux/netfilter_ipv4/ip_conntrack_h323.h
+++ b/include/linux/netfilter_ipv4/ip_conntrack_h323.h
@@ -3,6 +3,8 @@
3 3
4#ifdef __KERNEL__ 4#ifdef __KERNEL__
5 5
6#include <linux/netfilter_ipv4/ip_conntrack_helper_h323_asn1.h>
7
6#define RAS_PORT 1719 8#define RAS_PORT 1719
7#define Q931_PORT 1720 9#define Q931_PORT 1720
8#define H323_RTP_CHANNEL_MAX 4 /* Audio, video, FAX and other */ 10#define H323_RTP_CHANNEL_MAX 4 /* Audio, video, FAX and other */
@@ -25,6 +27,56 @@ struct ip_ct_h323_master {
25 }; 27 };
26}; 28};
27 29
30struct ip_conntrack_expect;
31
32extern int get_h225_addr(unsigned char *data, TransportAddress * addr,
33 u_int32_t * ip, u_int16_t * port);
34extern void ip_conntrack_h245_expect(struct ip_conntrack *new,
35 struct ip_conntrack_expect *this);
36extern void ip_conntrack_q931_expect(struct ip_conntrack *new,
37 struct ip_conntrack_expect *this);
38extern int (*set_h245_addr_hook) (struct sk_buff ** pskb,
39 unsigned char **data, int dataoff,
40 H245_TransportAddress * addr,
41 u_int32_t ip, u_int16_t port);
42extern int (*set_h225_addr_hook) (struct sk_buff ** pskb,
43 unsigned char **data, int dataoff,
44 TransportAddress * addr,
45 u_int32_t ip, u_int16_t port);
46extern int (*set_sig_addr_hook) (struct sk_buff ** pskb,
47 struct ip_conntrack * ct,
48 enum ip_conntrack_info ctinfo,
49 unsigned char **data,
50 TransportAddress * addr, int count);
51extern int (*set_ras_addr_hook) (struct sk_buff ** pskb,
52 struct ip_conntrack * ct,
53 enum ip_conntrack_info ctinfo,
54 unsigned char **data,
55 TransportAddress * addr, int count);
56extern int (*nat_rtp_rtcp_hook) (struct sk_buff ** pskb,
57 struct ip_conntrack * ct,
58 enum ip_conntrack_info ctinfo,
59 unsigned char **data, int dataoff,
60 H245_TransportAddress * addr,
61 u_int16_t port, u_int16_t rtp_port,
62 struct ip_conntrack_expect * rtp_exp,
63 struct ip_conntrack_expect * rtcp_exp);
64extern int (*nat_t120_hook) (struct sk_buff ** pskb, struct ip_conntrack * ct,
65 enum ip_conntrack_info ctinfo,
66 unsigned char **data, int dataoff,
67 H245_TransportAddress * addr, u_int16_t port,
68 struct ip_conntrack_expect * exp);
69extern int (*nat_h245_hook) (struct sk_buff ** pskb, struct ip_conntrack * ct,
70 enum ip_conntrack_info ctinfo,
71 unsigned char **data, int dataoff,
72 TransportAddress * addr, u_int16_t port,
73 struct ip_conntrack_expect * exp);
74extern int (*nat_q931_hook) (struct sk_buff ** pskb, struct ip_conntrack * ct,
75 enum ip_conntrack_info ctinfo,
76 unsigned char **data, TransportAddress * addr,
77 int idx, u_int16_t port,
78 struct ip_conntrack_expect * exp);
79
28#endif 80#endif
29 81
30#endif 82#endif
diff --git a/include/linux/netfilter_ipv4/ip_conntrack_helper_h323_asn1.h b/include/linux/netfilter_ipv4/ip_conntrack_helper_h323_asn1.h
new file mode 100644
index 0000000000..0bd828081c
--- /dev/null
+++ b/include/linux/netfilter_ipv4/ip_conntrack_helper_h323_asn1.h
@@ -0,0 +1,98 @@
1/****************************************************************************
2 * ip_conntrack_helper_h323_asn1.h - BER and PER decoding library for H.323
3 * conntrack/NAT module.
4 *
5 * Copyright (c) 2006 by Jing Min Zhao <zhaojingmin@hotmail.com>
6 *
7 * This source code is licensed under General Public License version 2.
8 *
9 *
10 * This library is based on H.225 version 4, H.235 version 2 and H.245
11 * version 7. It is extremely optimized to decode only the absolutely
12 * necessary objects in a signal for Linux kernel NAT module use, so don't
13 * expect it to be a full ASN.1 library.
14 *
15 * Features:
16 *
17 * 1. Small. The total size of code plus data is less than 20 KB (IA32).
18 * 2. Fast. Decoding Netmeeting's Setup signal 1 million times on a PIII 866
19 * takes only 3.9 seconds.
20 * 3. No memory allocation. It uses a static object. No need to initialize or
21 * cleanup.
22 * 4. Thread safe.
23 * 5. Support embedded architectures that has no misaligned memory access
24 * support.
25 *
26 * Limitations:
27 *
28 * 1. At most 30 faststart entries. Actually this is limited by ethernet's MTU.
29 * If a Setup signal contains more than 30 faststart, the packet size will
30 * very likely exceed the MTU size, then the TPKT will be fragmented. I
31 * don't know how to handle this in a Netfilter module. Anybody can help?
32 * Although I think 30 is enough for most of the cases.
33 * 2. IPv4 addresses only.
34 *
35 ****************************************************************************/
36
37#ifndef _IP_CONNTRACK_HELPER_H323_ASN1_H_
38#define _IP_CONNTRACK_HELPER_H323_ASN1_H_
39
40/*****************************************************************************
41 * H.323 Types
42 ****************************************************************************/
43#include "ip_conntrack_helper_h323_types.h"
44
45typedef struct {
46 enum {
47 Q931_NationalEscape = 0x00,
48 Q931_Alerting = 0x01,
49 Q931_CallProceeding = 0x02,
50 Q931_Connect = 0x07,
51 Q931_ConnectAck = 0x0F,
52 Q931_Progress = 0x03,
53 Q931_Setup = 0x05,
54 Q931_SetupAck = 0x0D,
55 Q931_Resume = 0x26,
56 Q931_ResumeAck = 0x2E,
57 Q931_ResumeReject = 0x22,
58 Q931_Suspend = 0x25,
59 Q931_SuspendAck = 0x2D,
60 Q931_SuspendReject = 0x21,
61 Q931_UserInformation = 0x20,
62 Q931_Disconnect = 0x45,
63 Q931_Release = 0x4D,
64 Q931_ReleaseComplete = 0x5A,
65 Q931_Restart = 0x46,
66 Q931_RestartAck = 0x4E,
67 Q931_Segment = 0x60,
68 Q931_CongestionCtrl = 0x79,
69 Q931_Information = 0x7B,
70 Q931_Notify = 0x6E,
71 Q931_Status = 0x7D,
72 Q931_StatusEnquiry = 0x75,
73 Q931_Facility = 0x62
74 } MessageType;
75 H323_UserInformation UUIE;
76} Q931;
77
78/*****************************************************************************
79 * Decode Functions Return Codes
80 ****************************************************************************/
81
82#define H323_ERROR_NONE 0 /* Decoded successfully */
83#define H323_ERROR_STOP 1 /* Decoding stopped, not really an error */
84#define H323_ERROR_BOUND -1
85#define H323_ERROR_RANGE -2
86
87
88/*****************************************************************************
89 * Decode Functions
90 ****************************************************************************/
91
92int DecodeRasMessage(unsigned char *buf, size_t sz, RasMessage * ras);
93int DecodeQ931(unsigned char *buf, size_t sz, Q931 * q931);
94int DecodeMultimediaSystemControlMessage(unsigned char *buf, size_t sz,
95 MultimediaSystemControlMessage *
96 mscm);
97
98#endif
diff --git a/include/linux/netfilter_ipv4/ip_conntrack_helper_h323_types.h b/include/linux/netfilter_ipv4/ip_conntrack_helper_h323_types.h
new file mode 100644
index 0000000000..cc98f7aa5a
--- /dev/null
+++ b/include/linux/netfilter_ipv4/ip_conntrack_helper_h323_types.h
@@ -0,0 +1,938 @@
1/* Generated by Jing Min Zhao's ASN.1 parser, Mar 15 2006
2 *
3 * Copyright (c) 2006 Jing Min Zhao <zhaojingmin@users.sourceforge.net>
4 *
5 * This source code is licensed under General Public License version 2.
6 */
7
8typedef struct TransportAddress_ipAddress { /* SEQUENCE */
9 int options; /* No use */
10 unsigned ip;
11} TransportAddress_ipAddress;
12
1