1
2
3 #ifndef _NF_CONNTRACK_PPTP_H
4 #define _NF_CONNTRACK_PPTP_H
5
6 #include <linux/netfilter.h>
7 #include <linux/skbuff.h>
8 #include <linux/types.h>
9 #include <linux/netfilter/nf_conntrack_common.h>
10 #include <net/netfilter/nf_conntrack_expect.h>
11 #include <uapi/linux/netfilter/nf_conntrack_tuple_common.h>
12
13 const char *pptp_msg_name(u_int16_t msg);
14
15
16 enum pptp_ctrlsess_state {
17 PPTP_SESSION_NONE,
18 PPTP_SESSION_ERROR,
19 PPTP_SESSION_STOPREQ,
20 PPTP_SESSION_REQUESTED,
21 PPTP_SESSION_CONFIRMED,
22 };
23
24
25 enum pptp_ctrlcall_state {
26 PPTP_CALL_NONE,
27 PPTP_CALL_ERROR,
28 PPTP_CALL_OUT_REQ,
29 PPTP_CALL_OUT_CONF,
30 PPTP_CALL_IN_REQ,
31 PPTP_CALL_IN_REP,
32 PPTP_CALL_IN_CONF,
33 PPTP_CALL_CLEAR_REQ,
34 };
35
36
37 struct nf_ct_pptp_master {
38 enum pptp_ctrlsess_state sstate;
39 enum pptp_ctrlcall_state cstate;
40 __be16 pac_call_id;
41 __be16 pns_call_id;
42
43
44
45 struct nf_ct_gre_keymap *keymap[IP_CT_DIR_MAX];
46 };
47
48 struct nf_nat_pptp {
49 __be16 pns_call_id;
50 __be16 pac_call_id;
51 };
52
53 #define PPTP_CONTROL_PORT 1723
54
55 #define PPTP_PACKET_CONTROL 1
56 #define PPTP_PACKET_MGMT 2
57
58 #define PPTP_MAGIC_COOKIE 0x1a2b3c4d
59
60 struct pptp_pkt_hdr {
61 __u16 packetLength;
62 __be16 packetType;
63 __be32 magicCookie;
64 };
65
66
67 #define PPTP_START_SESSION_REQUEST 1
68 #define PPTP_START_SESSION_REPLY 2
69 #define PPTP_STOP_SESSION_REQUEST 3
70 #define PPTP_STOP_SESSION_REPLY 4
71 #define PPTP_ECHO_REQUEST 5
72 #define PPTP_ECHO_REPLY 6
73 #define PPTP_OUT_CALL_REQUEST 7
74 #define PPTP_OUT_CALL_REPLY 8
75 #define PPTP_IN_CALL_REQUEST 9
76 #define PPTP_IN_CALL_REPLY 10
77 #define PPTP_IN_CALL_CONNECT 11
78 #define PPTP_CALL_CLEAR_REQUEST 12
79 #define PPTP_CALL_DISCONNECT_NOTIFY 13
80 #define PPTP_WAN_ERROR_NOTIFY 14
81 #define PPTP_SET_LINK_INFO 15
82
83 #define PPTP_MSG_MAX 15
84
85
86 #define PPTP_ERROR_CODE_NONE 0
87 #define PPTP_NOT_CONNECTED 1
88 #define PPTP_BAD_FORMAT 2
89 #define PPTP_BAD_VALUE 3
90 #define PPTP_NO_RESOURCE 4
91 #define PPTP_BAD_CALLID 5
92 #define PPTP_REMOVE_DEVICE_ERROR 6
93
94 struct PptpControlHeader {
95 __be16 messageType;
96 __u16 reserved;
97 };
98
99
100 #define PPTP_FRAME_CAP_ASYNC 0x1
101 #define PPTP_FRAME_CAP_SYNC 0x2
102
103
104 #define PPTP_BEARER_CAP_ANALOG 0x1
105 #define PPTP_BEARER_CAP_DIGITAL 0x2
106
107 struct PptpStartSessionRequest {
108 __be16 protocolVersion;
109 __u16 reserved1;
110 __be32 framingCapability;
111 __be32 bearerCapability;
112 __be16 maxChannels;
113 __be16 firmwareRevision;
114 __u8 hostName[64];
115 __u8 vendorString[64];
116 };
117
118
119 #define PPTP_START_OK 1
120 #define PPTP_START_GENERAL_ERROR 2
121 #define PPTP_START_ALREADY_CONNECTED 3
122 #define PPTP_START_NOT_AUTHORIZED 4
123 #define PPTP_START_UNKNOWN_PROTOCOL 5
124
125 struct PptpStartSessionReply {
126 __be16 protocolVersion;
127 __u8 resultCode;
128 __u8 generalErrorCode;
129 __be32 framingCapability;
130 __be32 bearerCapability;
131 __be16 maxChannels;
132 __be16 firmwareRevision;
133 __u8 hostName[64];
134 __u8 vendorString[64];
135 };
136
137
138 #define PPTP_STOP_NONE 1
139 #define PPTP_STOP_PROTOCOL 2
140 #define PPTP_STOP_LOCAL_SHUTDOWN 3
141
142 struct PptpStopSessionRequest {
143 __u8 reason;
144 __u8 reserved1;
145 __u16 reserved2;
146 };
147
148
149 #define PPTP_STOP_OK 1
150 #define PPTP_STOP_GENERAL_ERROR 2
151
152 struct PptpStopSessionReply {
153 __u8 resultCode;
154 __u8 generalErrorCode;
155 __u16 reserved1;
156 };
157
158 struct PptpEchoRequest {
159 __be32 identNumber;
160 };
161
162
163 #define PPTP_ECHO_OK 1
164 #define PPTP_ECHO_GENERAL_ERROR 2
165
166 struct PptpEchoReply {
167 __be32 identNumber;
168 __u8 resultCode;
169 __u8 generalErrorCode;
170 __u16 reserved;
171 };
172
173
174 #define PPTP_ASYNC_FRAMING 1
175 #define PPTP_SYNC_FRAMING 2
176 #define PPTP_DONT_CARE_FRAMING 3
177
178
179 #define PPTP_ANALOG_TYPE 1
180 #define PPTP_DIGITAL_TYPE 2
181 #define PPTP_DONT_CARE_BEARER_TYPE 3
182
183 struct PptpOutCallRequest {
184 __be16 callID;
185 __be16 callSerialNumber;
186 __be32 minBPS;
187 __be32 maxBPS;
188 __be32 bearerType;
189 __be32 framingType;
190 __be16 packetWindow;
191 __be16 packetProcDelay;
192 __be16 phoneNumberLength;
193 __u16 reserved1;
194 __u8 phoneNumber[64];
195 __u8 subAddress[64];
196 };
197
198
199 #define PPTP_OUTCALL_CONNECT 1
200 #define PPTP_OUTCALL_GENERAL_ERROR 2
201 #define PPTP_OUTCALL_NO_CARRIER 3
202 #define PPTP_OUTCALL_BUSY 4
203 #define PPTP_OUTCALL_NO_DIAL_TONE 5
204 #define PPTP_OUTCALL_TIMEOUT 6
205 #define PPTP_OUTCALL_DONT_ACCEPT 7
206
207 struct PptpOutCallReply {
208 __be16 callID;
209 __be16 peersCallID;
210 __u8 resultCode;
211 __u8 generalErrorCode;
212 __be16 causeCode;
213 __be32 connectSpeed;
214 __be16 packetWindow;
215 __be16 packetProcDelay;
216 __be32 physChannelID;
217 };
218
219 struct PptpInCallRequest {
220 __be16 callID;
221 __be16 callSerialNumber;
222 __be32 callBearerType;
223 __be32 physChannelID;
224 __be16 dialedNumberLength;
225 __be16 dialingNumberLength;
226 __u8 dialedNumber[64];
227 __u8 dialingNumber[64];
228 __u8 subAddress[64];
229 };
230
231
232 #define PPTP_INCALL_ACCEPT 1
233 #define PPTP_INCALL_GENERAL_ERROR 2
234 #define PPTP_INCALL_DONT_ACCEPT 3
235
236 struct PptpInCallReply {
237 __be16 callID;
238 __be16 peersCallID;
239 __u8 resultCode;
240 __u8 generalErrorCode;
241 __be16 packetWindow;
242 __be16 packetProcDelay;
243 __u16 reserved;
244 };
245
246 struct PptpInCallConnected {
247 __be16 peersCallID;
248 __u16 reserved;
249 __be32 connectSpeed;
250 __be16 packetWindow;
251 __be16 packetProcDelay;
252 __be32 callFramingType;
253 };
254
255 struct PptpClearCallRequest {
256 __be16 callID;
257 __u16 reserved;
258 };
259
260 struct PptpCallDisconnectNotify {
261 __be16 callID;
262 __u8 resultCode;
263 __u8 generalErrorCode;
264 __be16 causeCode;
265 __u16 reserved;
266 __u8 callStatistics[128];
267 };
268
269 struct PptpWanErrorNotify {
270 __be16 peersCallID;
271 __u16 reserved;
272 __be32 crcErrors;
273 __be32 framingErrors;
274 __be32 hardwareOverRuns;
275 __be32 bufferOverRuns;
276 __be32 timeoutErrors;
277 __be32 alignmentErrors;
278 };
279
280 struct PptpSetLinkInfo {
281 __be16 peersCallID;
282 __u16 reserved;
283 __be32 sendAccm;
284 __be32 recvAccm;
285 };
286
287 union pptp_ctrl_union {
288 struct PptpStartSessionRequest sreq;
289 struct PptpStartSessionReply srep;
290 struct PptpStopSessionRequest streq;
291 struct PptpStopSessionReply strep;
292 struct PptpOutCallRequest ocreq;
293 struct PptpOutCallReply ocack;
294 struct PptpInCallRequest icreq;
295 struct PptpInCallReply icack;
296 struct PptpInCallConnected iccon;
297 struct PptpClearCallRequest clrreq;
298 struct PptpCallDisconnectNotify disc;
299 struct PptpWanErrorNotify wanerr;
300 struct PptpSetLinkInfo setlink;
301 };
302
303 extern 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
310 extern 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
317 extern void
318 (*nf_nat_pptp_hook_exp_gre)(struct nf_conntrack_expect *exp_orig,
319 struct nf_conntrack_expect *exp_reply);
320
321 extern void
322 (*nf_nat_pptp_hook_expectfn)(struct nf_conn *ct,
323 struct nf_conntrack_expect *exp);
324
325 #endif