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Vector Packet Processing
cnat_v4_pptp_alg.h
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1 /*
2  *------------------------------------------------------------------
3  * cnat_v4_pptp_alg.h
4  *
5  * Copyright (c) 2009-2013 Cisco and/or its affiliates.
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at:
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  *------------------------------------------------------------------
18  */
19 
20 #ifndef __CNAT_V4_PPTP_ALG_H__
21 #define __CNAT_V4_PPTP_ALG_H__
22 
23 /* Debug utils of PPTP */
24 #define PPTP_DBG(debug, ...) \
25  if(PREDICT_FALSE(cnat_pptp_debug_flag >= debug)) { \
26  PLATFORM_DEBUG_PRINT("%s:%s:%d - ", \
27  __FILE__, __FUNCTION__, __LINE__);\
28  PLATFORM_DEBUG_PRINT(__VA_ARGS__);\
29  PLATFORM_DEBUG_PRINT("\n"); \
30  }
31 
32 #define PPTP_DUMP_PACKET(ip, len) pptp_hex_dump(ip, len)
33 
34 
35 #define PPTP_DISABLED 0
36 #define PPTP_ENABLED 1
37 
38 #define PPTP_GRE_TIMEOUT 60 /*sec */
39 
40 #define TCP_PPTP_PORT 1723
41 
42 #define PPTP_PAC 0
43 #define PPTP_PNS 1
44 
45 /* PPTP MSG TYPE */
46 
47 #define PPTP_MSG_TYPE_CONTROL 1
48 #define PPTP_MSG_TYPE_MGMT 2
49 
50 /* PPTP control messages */
51 
52 /* control connection mgmt */
53 #define PPTP_START_CC_RQ 1
54 #define PPTP_START_CC_RP 2
55 #define PPTP_STOP_CC_RQ 3
56 #define PPTP_STOP_CC_RP 4
57 #define PPTP_ECHO_RQ 5
58 #define PPTP_ECHO_RP 6
59 
60 /* call mgmt */
61 #define PPTP_OBOUND_CALL_RQ 7
62 #define PPTP_OBOUND_CALL_RP 8
63 #define PPTP_IBOUND_CALL_RQ 9
64 #define PPTP_IBOUND_CALL_RP 10
65 #define PPTP_IBOUND_CALL_CN 11
66 #define PPTP_CALL_CLEAR_RQ 12
67 #define PPTP_CALL_DISCON_NT 13
68 
69 /* other */
70 
71 #define PPTP_WAN_ERR_NT 14
72 #define PPTP_SET_LINK_INF 15
73 
74 #define PPTP_MIN_HDR_LEN 8
75 
76 /* Byte offsets from start of TCP Data(PPTP header) */
77 
78 #define PPTP_CTRL_MGMT_TYPE_OFFSET 0x02
79 #define PPTP_CC_TYPE_OFFSET 0x08
80 #define PPTP_HDR_CALL_ID_OFFSET 0x0c
81 #define PPTP_HDR_PEER_CALL_ID_OFFSET 0x0e
82 
83 #define PPTP_HDR_RESULT_CODE_OFFSET_STCCRP 0x0e
84 #define PPTP_HDR_RESULT_CODE_OFFSET 0x10
85 
86 
87 /* Offset of control/mgmt msg types
88  from start of TCP header */
89 
90 #define TCP_HEADER_SIZE(tcp) \
91  ((tcp->hdr_len>>4) << 2)
92 
93 
94 #define PPTP_MSG_START_OFFSET(tcp) \
95  ((u8*)tcp + TCP_HEADER_SIZE(tcp))
96 
97 
98 #define PPTP_CC_MSG_TYPE_OFFSET(tcp) \
99  (PPTP_MSG_START_OFFSET(tcp) + \
100  PPTP_CC_TYPE_OFFSET )
101 
102 #define PPTP_MGMT_MSG_TYPE_OFFSET(tcp) \
103  ( PPTP_MSG_START_OFFSET(tcp) + \
104  PPTP_CTRL_MGMT_TYPE_OFFSET )
105 
106 #define PPTP_CALL_ID_OFFSET(tcp) \
107  ( PPTP_MSG_START_OFFSET(tcp) + \
108  PPTP_HDR_CALL_ID_OFFSET )
109 
110 #define PPTP_PEER_CALL_ID_OFFSET(tcp) \
111  ( PPTP_MSG_START_OFFSET(tcp) + \
112  PPTP_HDR_PEER_CALL_ID_OFFSET )
113 
114 #define PPTP_RESULT_CODE_OFFSET(tcp) \
115  ( PPTP_MSG_START_OFFSET(tcp) + \
116  PPTP_HDR_RESULT_CODE_OFFSET )
117 
118 #define PPTP_RESULT_CODE_OFFSET_STCCRP(tcp) \
119  ( PPTP_MSG_START_OFFSET(tcp) + \
120  PPTP_HDR_RESULT_CODE_OFFSET_STCCRP)
121 
122 /* values */
123 #define PPTP_CC_MSG_TYPE(tcp) \
124  (u16*)PPTP_CC_MSG_TYPE_OFFSET(tcp)
125 
126 #define PPTP_MGMT_MSG_TYPE(tcp) \
127  (u16*)PPTP_MGMT_MSG_TYPE_OFFSET(tcp)
128 
129 #define PPTP_CALL_ID(tcp) \
130  (u16*)PPTP_CALL_ID_OFFSET(tcp)
131 
132 #define PPTP_PEER_CALL_ID(tcp) \
133  (u16*)PPTP_PEER_CALL_ID_OFFSET(tcp)
134 
135 #define PPTP_RESULT_CODE(tcp) \
136  *(u8*)PPTP_RESULT_CODE_OFFSET(tcp);
137 
138 #define PPTP_RESULT_CODE_STCCRP(tcp) \
139  *(u8*)PPTP_RESULT_CODE_OFFSET_STCCRP(tcp);
140 
141 
142 /* other code */
143 #define PPTP_CHAN_SUCCESS 1
144 
145 
146 /* Data structures */
147 
149 
150 #endif /* __CNAT_V4_PPTP_ALG_H__ */
u32 cnat_pptp_debug_flag
unsigned int u32
Definition: types.h:88