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
  53 #include <linux/netfilter_ipv4/lockhelp.h>
  54 DECLARE_LOCK_EXTERN(ip_pptp_lock);
  55
  56 #define IP_CONNTR_PPTP          PPTP_CONTROL_PORT
  57
  58 #define PPTP_CONTROL_PORT       1723
  59
  60 #define PPTP_PACKET_CONTROL     1
  61 #define PPTP_PACKET_MGMT        2
  62
  63 #define PPTP_MAGIC_COOKIE       0x1a2b3c4d
  64
  65 struct pptp_pkt_hdr {
  66         __u16   packetLength;
  67         __u16   packetType;
  68         __u32   magicCookie;
  69 };
  70
  71 /* PptpControlMessageType values */
  72 #define PPTP_START_SESSION_REQUEST      1
  73 #define PPTP_START_SESSION_REPLY        2
  74 #define PPTP_STOP_SESSION_REQUEST       3
  75 #define PPTP_STOP_SESSION_REPLY         4
  76 #define PPTP_ECHO_REQUEST               5
  77 #define PPTP_ECHO_REPLY                 6
  78 #define PPTP_OUT_CALL_REQUEST           7
  79 #define PPTP_OUT_CALL_REPLY             8
  80 #define PPTP_IN_CALL_REQUEST            9
  81 #define PPTP_IN_CALL_REPLY              10
  82 #define PPTP_IN_CALL_CONNECT            11
  83 #define PPTP_CALL_CLEAR_REQUEST         12
  84 #define PPTP_CALL_DISCONNECT_NOTIFY     13
  85 #define PPTP_WAN_ERROR_NOTIFY           14
  86 #define PPTP_SET_LINK_INFO              15
  87
  88 #define PPTP_MSG_MAX                    15
  89
  90 /* PptpGeneralError values */
  91 #define PPTP_ERROR_CODE_NONE            0
  92 #define PPTP_NOT_CONNECTED              1
  93 #define PPTP_BAD_FORMAT                 2
  94 #define PPTP_BAD_VALUE                  3
  95 #define PPTP_NO_RESOURCE                4
  96 #define PPTP_BAD_CALLID                 5
  97 #define PPTP_REMOVE_DEVICE_ERROR        6
  98
  99 struct PptpControlHeader {
 100         __u16   messageType;
 101         __u16   reserved;
 102 };
 103
 104 /* FramingCapability Bitmap Values */
 105 #define PPTP_FRAME_CAP_ASYNC            0x1
 106 #define PPTP_FRAME_CAP_SYNC             0x2
 107
 108 /* BearerCapability Bitmap Values */
 109 #define PPTP_BEARER_CAP_ANALOG          0x1
 110 #define PPTP_BEARER_CAP_DIGITAL         0x2
 111
 112 struct PptpStartSessionRequest {
 113         __u16   protocolVersion;
 114         __u8    reserved1;
 115         __u8    reserved2;
 116         __u32   framingCapability;
 117         __u32   bearerCapability;
 118         __u16   maxChannels;
 119         __u16   firmwareRevision;
 120         __u8    hostName[64];
 121         __u8    vendorString[64];
 122 };
 123
 124 /* PptpStartSessionResultCode Values */
 125 #define PPTP_START_OK                   1
 126 #define PPTP_START_GENERAL_ERROR        2
 127 #define PPTP_START_ALREADY_CONNECTED    3
 128 #define PPTP_START_NOT_AUTHORIZED       4
 129 #define PPTP_START_UNKNOWN_PROTOCOL     5
 130
 131 struct PptpStartSessionReply {
 132         __u16   protocolVersion;
 133         __u8    resultCode;
 134         __u8    generalErrorCode;
 135         __u32   framingCapability;
 136         __u32   bearerCapability;
 137         __u16   maxChannels;
 138         __u16   firmwareRevision;
 139         __u8    hostName[64];
 140         __u8    vendorString[64];
 141 };
 142
 143 /* PptpStopReasons */
 144 #define PPTP_STOP_NONE                  1
 145 #define PPTP_STOP_PROTOCOL              2
 146 #define PPTP_STOP_LOCAL_SHUTDOWN        3
 147
 148 struct PptpStopSessionRequest {
 149         __u8    reason;
 150 };
 151
 152 /* PptpStopSessionResultCode */
 153 #define PPTP_STOP_OK                    1
 154 #define PPTP_STOP_GENERAL_ERROR         2
 155
 156 struct PptpStopSessionReply {
 157         __u8    resultCode;
 158         __u8    generalErrorCode;
 159 };
 160
 161 struct PptpEchoRequest {
 162         __u32 identNumber;
 163 };
 164
 165 /* PptpEchoReplyResultCode */
 166 #define PPTP_ECHO_OK                    1
 167 #define PPTP_ECHO_GENERAL_ERROR         2
 168
 169 struct PptpEchoReply {
 170         __u32   identNumber;
 171         __u8    resultCode;
 172         __u8    generalErrorCode;
 173         __u16   reserved;
 174 };
 175
 176 /* PptpFramingType */
 177 #define PPTP_ASYNC_FRAMING              1
 178 #define PPTP_SYNC_FRAMING               2
 179 #define PPTP_DONT_CARE_FRAMING          3
 180
 181 /* PptpCallBearerType */
 182 #define PPTP_ANALOG_TYPE                1
 183 #define PPTP_DIGITAL_TYPE               2
 184 #define PPTP_DONT_CARE_BEARER_TYPE      3
 185
 186 struct PptpOutCallRequest {
 187         __u16   callID;
 188         __u16   callSerialNumber;
 189         __u32   minBPS;
 190         __u32   maxBPS;
 191         __u32   bearerType;
 192         __u32   framingType;
 193         __u16   packetWindow;
 194         __u16   packetProcDelay;
 195         __u16   reserved1;
 196         __u16   phoneNumberLength;
 197         __u16   reserved2;
 198         __u8    phoneNumber[64];
 199         __u8    subAddress[64];
 200 };
 201
 202 /* PptpCallResultCode */
 203 #define PPTP_OUTCALL_CONNECT            1
 204 #define PPTP_OUTCALL_GENERAL_ERROR      2
 205 #define PPTP_OUTCALL_NO_CARRIER         3
 206 #define PPTP_OUTCALL_BUSY               4
 207 #define PPTP_OUTCALL_NO_DIAL_TONE       5
 208 #define PPTP_OUTCALL_TIMEOUT            6
 209 #define PPTP_OUTCALL_DONT_ACCEPT        7
 210
 211 struct PptpOutCallReply {
 212         __u16   callID;
 213         __u16   peersCallID;
 214         __u8    resultCode;
 215         __u8    generalErrorCode;
 216         __u16   causeCode;
 217         __u32   connectSpeed;
 218         __u16   packetWindow;
 219         __u16   packetProcDelay;
 220         __u32   physChannelID;
 221 };
 222
 223 struct PptpInCallRequest {
 224         __u16   callID;
 225         __u16   callSerialNumber;
 226         __u32   callBearerType;
 227         __u32   physChannelID;
 228         __u16   dialedNumberLength;
 229         __u16   dialingNumberLength;
 230         __u8    dialedNumber[64];
 231         __u8    dialingNumber[64];
 232         __u8    subAddress[64];
 233 };
 234
 235 /* PptpInCallResultCode */
 236 #define PPTP_INCALL_ACCEPT              1
 237 #define PPTP_INCALL_GENERAL_ERROR       2
 238 #define PPTP_INCALL_DONT_ACCEPT         3
 239
 240 struct PptpInCallReply {
 241         __u16   callID;
 242         __u16   peersCallID;
 243         __u8    resultCode;
 244         __u8    generalErrorCode;
 245         __u16   packetWindow;
 246         __u16   packetProcDelay;
 247         __u16   reserved;
 248 };
 249
 250 struct PptpInCallConnected {
 251         __u16   peersCallID;
 252         __u16   reserved;
 253         __u32   connectSpeed;
 254         __u16   packetWindow;
 255         __u16   packetProcDelay;
 256         __u32   callFramingType;
 257 };
 258
 259 struct PptpClearCallRequest {
 260         __u16   callID;
 261         __u16   reserved;
 262 };
 263
 264 struct PptpCallDisconnectNotify {
 265         __u16   callID;
 266         __u8    resultCode;
 267         __u8    generalErrorCode;
 268         __u16   causeCode;
 269         __u16   reserved;
 270         __u8    callStatistics[128];
 271 };
 272
 273 struct PptpWanErrorNotify {
 274         __u16   peersCallID;
 275         __u16   reserved;
 276         __u32   crcErrors;
 277         __u32   framingErrors;
 278         __u32   hardwareOverRuns;
 279         __u32   bufferOverRuns;
 280         __u32   timeoutErrors;
 281         __u32   alignmentErrors;
 282 };
 283
 284 struct PptpSetLinkInfo {
 285         __u16   peersCallID;
 286         __u16   reserved;
 287         __u32   sendAccm;
 288         __u32   recvAccm;
 289 };
 290
 291
 292 struct pptp_priv_data {
 293         __u16   call_id;
 294         __u16   mcall_id;
 295         __u16   pcall_id;
 296 };
 297
 298 union pptp_ctrl_union {
 299                 struct PptpStartSessionRequest  sreq;
 300                 struct PptpStartSessionReply    srep;
 301                 struct PptpStopSessionRequest   streq;
 302                 struct PptpStopSessionReply     strep;
 303                 struct PptpOutCallRequest       ocreq;
 304                 struct PptpOutCallReply         ocack;
 305                 struct PptpInCallRequest        icreq;
 306                 struct PptpInCallReply          icack;
 307                 struct PptpInCallConnected      iccon;
 308                 struct PptpClearCallRequest     clrreq;
 309                 struct PptpCallDisconnectNotify disc;
 310                 struct PptpWanErrorNotify       wanerr;
 311                 struct PptpSetLinkInfo          setlink;
 312 };
 313
 314 struct ip_conntrack;
 315
 316 extern int
 317 (*ip_nat_pptp_hook_outbound)(struct sk_buff **pskb,
 318                           struct ip_conntrack *ct,
 319                           enum ip_conntrack_info ctinfo,
 320                           struct PptpControlHeader *ctlh,
 321                           union pptp_ctrl_union *pptpReq);
 322
 323 extern int
 324 (*ip_nat_pptp_hook_inbound)(struct sk_buff **pskb,
 325                           struct ip_conntrack *ct,
 326                           enum ip_conntrack_info ctinfo,
 327                           struct PptpControlHeader *ctlh,
 328                           union pptp_ctrl_union *pptpReq);
 329
 330 extern int
 331 (*ip_nat_pptp_hook_exp_gre)(struct ip_conntrack_expect *exp_orig,
 332                             struct ip_conntrack_expect *exp_reply);
 333
 334 extern void
 335 (*ip_nat_pptp_hook_expectfn)(struct ip_conntrack *ct,
 336                              struct ip_conntrack_expect *exp);
 337 #endif /* __KERNEL__ */
 338 #endif /* _CONNTRACK_PPTP_H */