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 */