1
2#ifndef _NF_CONNTRACK_PPTP_H
3#define _NF_CONNTRACK_PPTP_H
4
5#include <linux/netfilter/nf_conntrack_common.h>
6
7extern const char *const pptp_msg_name[];
8
9
10enum pptp_ctrlsess_state {
11 PPTP_SESSION_NONE,
12 PPTP_SESSION_ERROR,
13 PPTP_SESSION_STOPREQ,
14 PPTP_SESSION_REQUESTED,
15 PPTP_SESSION_CONFIRMED,
16};
17
18
19enum pptp_ctrlcall_state {
20 PPTP_CALL_NONE,
21 PPTP_CALL_ERROR,
22 PPTP_CALL_OUT_REQ,
23 PPTP_CALL_OUT_CONF,
24 PPTP_CALL_IN_REQ,
25 PPTP_CALL_IN_REP,
26 PPTP_CALL_IN_CONF,
27 PPTP_CALL_CLEAR_REQ,
28};
29
30
31struct nf_ct_pptp_master {
32 enum pptp_ctrlsess_state sstate;
33 enum pptp_ctrlcall_state cstate;
34 __be16 pac_call_id;
35 __be16 pns_call_id;
36
37
38
39 struct nf_ct_gre_keymap *keymap[IP_CT_DIR_MAX];
40};
41
42struct nf_nat_pptp {
43 __be16 pns_call_id;
44 __be16 pac_call_id;
45};
46
47#ifdef __KERNEL__
48
49#define PPTP_CONTROL_PORT 1723
50
51#define PPTP_PACKET_CONTROL 1
52#define PPTP_PACKET_MGMT 2
53
54#define PPTP_MAGIC_COOKIE 0x1a2b3c4d
55
56struct pptp_pkt_hdr {
57 __u16 packetLength;
58 __be16 packetType;
59 __be32 magicCookie;
60};
61
62
63#define PPTP_START_SESSION_REQUEST 1
64#define PPTP_START_SESSION_REPLY 2
65#define PPTP_STOP_SESSION_REQUEST 3
66#define PPTP_STOP_SESSION_REPLY 4
67#define PPTP_ECHO_REQUEST 5
68#define PPTP_ECHO_REPLY 6
69#define PPTP_OUT_CALL_REQUEST 7
70#define PPTP_OUT_CALL_REPLY 8
71#define PPTP_IN_CALL_REQUEST 9
72#define PPTP_IN_CALL_REPLY 10
73#define PPTP_IN_CALL_CONNECT 11
74#define PPTP_CALL_CLEAR_REQUEST 12
75#define PPTP_CALL_DISCONNECT_NOTIFY 13
76#define PPTP_WAN_ERROR_NOTIFY 14
77#define PPTP_SET_LINK_INFO 15
78
79#define PPTP_MSG_MAX 15
80
81
82#define PPTP_ERROR_CODE_NONE 0
83#define PPTP_NOT_CONNECTED 1
84#define PPTP_BAD_FORMAT 2
85#define PPTP_BAD_VALUE 3
86#define PPTP_NO_RESOURCE 4
87#define PPTP_BAD_CALLID 5
88#define PPTP_REMOVE_DEVICE_ERROR 6
89
90struct PptpControlHeader {
91 __be16 messageType;
92 __u16 reserved;
93};
94
95
96#define PPTP_FRAME_CAP_ASYNC 0x1
97#define PPTP_FRAME_CAP_SYNC 0x2
98
99
100#define PPTP_BEARER_CAP_ANALOG 0x1
101#define PPTP_BEARER_CAP_DIGITAL 0x2
102
103struct PptpStartSessionRequest {
104 __be16 protocolVersion;
105 __u16 reserved1;
106 __be32 framingCapability;
107 __be32 bearerCapability;
108 __be16 maxChannels;
109 __be16 firmwareRevision;
110 __u8 hostName[64];
111 __u8 vendorString[64];
112};
113
114
115#define PPTP_START_OK 1
116#define PPTP_START_GENERAL_ERROR 2
117#define PPTP_START_ALREADY_CONNECTED 3
118#define PPTP_START_NOT_AUTHORIZED 4
119#define PPTP_START_UNKNOWN_PROTOCOL 5
120
121struct PptpStartSessionReply {
122 __be16 protocolVersion;
123 __u8 resultCode;
124 __u8 generalErrorCode;
125 __be32 framingCapability;
126 __be32 bearerCapability;
127 __be16 maxChannels;
128 __be16 firmwareRevision;
129 __u8 hostName[64];
130 __u8 vendorString[64];
131};
132
133
134#define PPTP_STOP_NONE 1
135#define PPTP_STOP_PROTOCOL 2
136#define PPTP_STOP_LOCAL_SHUTDOWN 3
137
138struct PptpStopSessionRequest {
139 __u8 reason;
140 __u8 reserved1;
141 __u16 reserved2;
142};
143
144
145#define PPTP_STOP_OK 1
146#define PPTP_STOP_GENERAL_ERROR 2
147
148struct PptpStopSessionReply {
149 __u8 resultCode;
150 __u8 generalErrorCode;
151 __u16 reserved1;
152};
153
154struct PptpEchoRequest {
155 __be32 identNumber;
156};
157
158
159#define PPTP_ECHO_OK 1
160#define PPTP_ECHO_GENERAL_ERROR 2
161
162struct PptpEchoReply {
163 __be32 identNumber;
164 __u8 resultCode;
165 __u8 generalErrorCode;
166 __u16 reserved;
167};
168
169
170#define PPTP_ASYNC_FRAMING 1
171#define PPTP_SYNC_FRAMING 2
172#define PPTP_DONT_CARE_FRAMING 3
173
174
175#define PPTP_ANALOG_TYPE 1
176#define PPTP_DIGITAL_TYPE 2
177#define PPTP_DONT_CARE_BEARER_TYPE 3
178
179struct PptpOutCallRequest {
180 __be16 callID;
181 __be16 callSerialNumber;
182 __be32 minBPS;
183 __be32 maxBPS;
184 __be32 bearerType;
185 __be32 framingType;
186 __be16 packetWindow;
187 __be16 packetProcDelay;
188 __be16 phoneNumberLength;
189 __u16 reserved1;
190 __u8 phoneNumber[64];
191 __u8 subAddress[64];
192};
193
194
195#define PPTP_OUTCALL_CONNECT 1
196#define PPTP_OUTCALL_GENERAL_ERROR 2
197#define PPTP_OUTCALL_NO_CARRIER 3
198#define PPTP_OUTCALL_BUSY 4
199#define PPTP_OUTCALL_NO_DIAL_TONE 5
200#define PPTP_OUTCALL_TIMEOUT 6
201#define PPTP_OUTCALL_DONT_ACCEPT 7
202
203struct PptpOutCallReply {
204 __be16 callID;
205 __be16 peersCallID;
206 __u8 resultCode;
207 __u8 generalErrorCode;
208 __be16 causeCode;
209 __be32 connectSpeed;
210 __be16 packetWindow;
211 __be16 packetProcDelay;
212 __be32 physChannelID;
213};
214
215struct PptpInCallRequest {
216 __be16 callID;
217 __be16 callSerialNumber;
218 __be32 callBearerType;
219 __be32 physChannelID;
220 __be16 dialedNumberLength;
221 __be16 dialingNumberLength;
222 __u8 dialedNumber[64];
223 __u8 dialingNumber[64];
224 __u8 subAddress[64];
225};
226
227
228#define PPTP_INCALL_ACCEPT 1
229#define PPTP_INCALL_GENERAL_ERROR 2
230#define PPTP_INCALL_DONT_ACCEPT 3
231
232struct PptpInCallReply {
233 __be16 callID;
234 __be16 peersCallID;
235 __u8 resultCode;
236 __u8 generalErrorCode;
237 __be16 packetWindow;
238 __be16 packetProcDelay;
239 __u16 reserved;
240};
241
242struct PptpInCallConnected {
243 __be16 peersCallID;
244 __u16 reserved;
245 __be32 connectSpeed;
246 __be16 packetWindow;
247 __be16 packetProcDelay;
248 __be32 callFramingType;
249};
250
251struct PptpClearCallRequest {
252 __be16 callID;
253 __u16 reserved;
254};
255
256struct PptpCallDisconnectNotify {
257 __be16 callID;
258 __u8 resultCode;
259 __u8 generalErrorCode;
260 __be16 causeCode;
261 __u16 reserved;
262 __u8 callStatistics[128];
263};
264
265struct PptpWanErrorNotify {
266 __be16 peersCallID;
267 __u16 reserved;
268 __be32 crcErrors;
269 __be32 framingErrors;
270 __be32 hardwareOverRuns;
271 __be32 bufferOverRuns;
272 __be32 timeoutErrors;
273 __be32 alignmentErrors;
274};
275
276struct PptpSetLinkInfo {
277 __be16 peersCallID;
278 __u16 reserved;
279 __be32 sendAccm;
280 __be32 recvAccm;
281};
282
283union pptp_ctrl_union {
284 struct PptpStartSessionRequest sreq;
285 struct PptpStartSessionReply srep;
286 struct PptpStopSessionRequest streq;
287 struct PptpStopSessionReply strep;
288 struct PptpOutCallRequest ocreq;
289 struct PptpOutCallReply ocack;
290 struct PptpInCallRequest icreq;
291 struct PptpInCallReply icack;
292 struct PptpInCallConnected iccon;
293 struct PptpClearCallRequest clrreq;
294 struct PptpCallDisconnectNotify disc;
295 struct PptpWanErrorNotify wanerr;
296 struct PptpSetLinkInfo setlink;
297};
298
299
300struct nf_conn;
301struct nf_conntrack_expect;
302
303extern int
304(*nf_nat_pptp_hook_outbound)(struct sk_buff *skb,
305 struct nf_conn *ct, enum ip_conntrack_info ctinfo,
306 unsigned int protoff,
307 struct PptpControlHeader *ctlh,
308 union pptp_ctrl_union *pptpReq);
309
310extern int
311(*nf_nat_pptp_hook_inbound)(struct sk_buff *skb,
312 struct nf_conn *ct, enum ip_conntrack_info ctinfo,
313 unsigned int protoff,
314 struct PptpControlHeader *ctlh,
315 union pptp_ctrl_union *pptpReq);
316
317extern void
318(*nf_nat_pptp_hook_exp_gre)(struct nf_conntrack_expect *exp_orig,
319 struct nf_conntrack_expect *exp_reply);
320
321extern void
322(*nf_nat_pptp_hook_expectfn)(struct nf_conn *ct,
323 struct nf_conntrack_expect *exp);
324
325#endif
326#endif
327
