Merge git://git.infradead.org/hdrcleanup-2.6
[linux-2.6.git] / include / linux / netfilter_ipv4 / ip_conntrack_pptp.h
1 /* PPTP constants and structs */
2 #ifndef _CONNTRACK_PPTP_H
3 #define _CONNTRACK_PPTP_H
4
5 /* state of the control session */
6 enum pptp_ctrlsess_state {
7         PPTP_SESSION_NONE,                      /* no session present */
8         PPTP_SESSION_ERROR,                     /* some session error */
9         PPTP_SESSION_STOPREQ,                   /* stop_sess request seen */
10         PPTP_SESSION_REQUESTED,                 /* start_sess request seen */
11         PPTP_SESSION_CONFIRMED,                 /* session established */
12 };
13
14 /* state of the call inside the control session */
15 enum pptp_ctrlcall_state {
16         PPTP_CALL_NONE,
17         PPTP_CALL_ERROR,
18         PPTP_CALL_OUT_REQ,
19         PPTP_CALL_OUT_CONF,
20         PPTP_CALL_IN_REQ,
21         PPTP_CALL_IN_REP,
22         PPTP_CALL_IN_CONF,
23         PPTP_CALL_CLEAR_REQ,
24 };
25
26
27 /* conntrack private data */
28 struct ip_ct_pptp_master {
29         enum pptp_ctrlsess_state sstate;        /* session state */
30
31         /* everything below is going to be per-expectation in newnat,
32          * since there could be more than one call within one session */
33         enum pptp_ctrlcall_state cstate;        /* call state */
34         u_int16_t pac_call_id;                  /* call id of PAC, host byte order */
35         u_int16_t pns_call_id;                  /* call id of PNS, host byte order */
36
37         /* in pre-2.6.11 this used to be per-expect. Now it is per-conntrack
38          * and therefore imposes a fixed limit on the number of maps */
39         struct ip_ct_gre_keymap *keymap_orig, *keymap_reply;
40 };
41
42 /* conntrack_expect private member */
43 struct ip_ct_pptp_expect {
44         enum pptp_ctrlcall_state cstate;        /* call state */
45         u_int16_t pac_call_id;                  /* call id of PAC */
46         u_int16_t pns_call_id;                  /* call id of PNS */
47 };
48
49
50 #ifdef __KERNEL__
51
52 #define IP_CONNTR_PPTP          PPTP_CONTROL_PORT
53
54 #define PPTP_CONTROL_PORT       1723
55
56 #define PPTP_PACKET_CONTROL     1
57 #define PPTP_PACKET_MGMT        2
58
59 #define PPTP_MAGIC_COOKIE       0x1a2b3c4d
60
61 struct pptp_pkt_hdr {
62         __u16   packetLength;
63         __be16  packetType;
64         __be32  magicCookie;
65 };
66
67 /* PptpControlMessageType values */
68 #define PPTP_START_SESSION_REQUEST      1
69 #define PPTP_START_SESSION_REPLY        2
70 #define PPTP_STOP_SESSION_REQUEST       3
71 #define PPTP_STOP_SESSION_REPLY         4
72 #define PPTP_ECHO_REQUEST               5
73 #define PPTP_ECHO_REPLY                 6
74 #define PPTP_OUT_CALL_REQUEST           7
75 #define PPTP_OUT_CALL_REPLY             8
76 #define PPTP_IN_CALL_REQUEST            9
77 #define PPTP_IN_CALL_REPLY              10
78 #define PPTP_IN_CALL_CONNECT            11
79 #define PPTP_CALL_CLEAR_REQUEST         12
80 #define PPTP_CALL_DISCONNECT_NOTIFY     13
81 #define PPTP_WAN_ERROR_NOTIFY           14
82 #define PPTP_SET_LINK_INFO              15
83
84 #define PPTP_MSG_MAX                    15
85
86 /* PptpGeneralError values */
87 #define PPTP_ERROR_CODE_NONE            0
88 #define PPTP_NOT_CONNECTED              1
89 #define PPTP_BAD_FORMAT                 2
90 #define PPTP_BAD_VALUE                  3
91 #define PPTP_NO_RESOURCE                4
92 #define PPTP_BAD_CALLID                 5
93 #define PPTP_REMOVE_DEVICE_ERROR        6
94
95 struct PptpControlHeader {
96         __be16  messageType;
97         __u16   reserved;
98 };
99
100 /* FramingCapability Bitmap Values */
101 #define PPTP_FRAME_CAP_ASYNC            0x1
102 #define PPTP_FRAME_CAP_SYNC             0x2
103
104 /* BearerCapability Bitmap Values */
105 #define PPTP_BEARER_CAP_ANALOG          0x1
106 #define PPTP_BEARER_CAP_DIGITAL         0x2
107
108 struct PptpStartSessionRequest {
109         __be16  protocolVersion;
110         __u8    reserved1;
111         __u8    reserved2;
112         __be32  framingCapability;
113         __be32  bearerCapability;
114         __be16  maxChannels;
115         __be16  firmwareRevision;
116         __u8    hostName[64];
117         __u8    vendorString[64];
118 };
119
120 /* PptpStartSessionResultCode Values */
121 #define PPTP_START_OK                   1
122 #define PPTP_START_GENERAL_ERROR        2
123 #define PPTP_START_ALREADY_CONNECTED    3
124 #define PPTP_START_NOT_AUTHORIZED       4
125 #define PPTP_START_UNKNOWN_PROTOCOL     5
126
127 struct PptpStartSessionReply {
128         __be16  protocolVersion;
129         __u8    resultCode;
130         __u8    generalErrorCode;
131         __be32  framingCapability;
132         __be32  bearerCapability;
133         __be16  maxChannels;
134         __be16  firmwareRevision;
135         __u8    hostName[64];
136         __u8    vendorString[64];
137 };
138
139 /* PptpStopReasons */
140 #define PPTP_STOP_NONE                  1
141 #define PPTP_STOP_PROTOCOL              2
142 #define PPTP_STOP_LOCAL_SHUTDOWN        3
143
144 struct PptpStopSessionRequest {
145         __u8    reason;
146 };
147
148 /* PptpStopSessionResultCode */
149 #define PPTP_STOP_OK                    1
150 #define PPTP_STOP_GENERAL_ERROR         2
151
152 struct PptpStopSessionReply {
153         __u8    resultCode;
154         __u8    generalErrorCode;
155 };
156
157 struct PptpEchoRequest {
158         __be32 identNumber;
159 };
160
161 /* PptpEchoReplyResultCode */
162 #define PPTP_ECHO_OK                    1
163 #define PPTP_ECHO_GENERAL_ERROR         2
164
165 struct PptpEchoReply {
166         __be32  identNumber;
167         __u8    resultCode;
168         __u8    generalErrorCode;
169         __u16   reserved;
170 };
171
172 /* PptpFramingType */
173 #define PPTP_ASYNC_FRAMING              1
174 #define PPTP_SYNC_FRAMING               2
175 #define PPTP_DONT_CARE_FRAMING          3
176
177 /* PptpCallBearerType */
178 #define PPTP_ANALOG_TYPE                1
179 #define PPTP_DIGITAL_TYPE               2
180 #define PPTP_DONT_CARE_BEARER_TYPE      3
181
182 struct PptpOutCallRequest {
183         __be16  callID;
184         __be16  callSerialNumber;
185         __be32  minBPS;
186         __be32  maxBPS;
187         __be32  bearerType;
188         __be32  framingType;
189         __be16  packetWindow;
190         __be16  packetProcDelay;
191         __u16   reserved1;
192         __be16  phoneNumberLength;
193         __u16   reserved2;
194         __u8    phoneNumber[64];
195         __u8    subAddress[64];
196 };
197
198 /* PptpCallResultCode */
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 /* PptpInCallResultCode */
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 (*ip_nat_pptp_hook_outbound)(struct sk_buff **pskb,
305                           struct ip_conntrack *ct,
306                           enum ip_conntrack_info ctinfo,
307                           struct PptpControlHeader *ctlh,
308                           union pptp_ctrl_union *pptpReq);
309
310 extern int
311 (*ip_nat_pptp_hook_inbound)(struct sk_buff **pskb,
312                           struct ip_conntrack *ct,
313                           enum ip_conntrack_info ctinfo,
314                           struct PptpControlHeader *ctlh,
315                           union pptp_ctrl_union *pptpReq);
316
317 extern int
318 (*ip_nat_pptp_hook_exp_gre)(struct ip_conntrack_expect *exp_orig,
319                             struct ip_conntrack_expect *exp_reply);
320
321 extern void
322 (*ip_nat_pptp_hook_expectfn)(struct ip_conntrack *ct,
323                              struct ip_conntrack_expect *exp);
324 #endif /* __KERNEL__ */
325 #endif /* _CONNTRACK_PPTP_H */