include/linux/netfilter/nf_conntrack_pptp.h

   1 /* PPTP constants and structs */
   2 #ifndef _NF_CONNTRACK_PPTP_H
   3 #define _NF_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 /* conntrack private data */
  27 struct nf_ct_pptp_master {
  28         enum pptp_ctrlsess_state sstate;        /* session state */
  29         enum pptp_ctrlcall_state cstate;        /* call state */
  30         __be16 pac_call_id;                     /* call id of PAC */
  31         __be16 pns_call_id;                     /* call id of PNS */
  32
  33         /* in pre-2.6.11 this used to be per-expect. Now it is per-conntrack
  34          * and therefore imposes a fixed limit on the number of maps */
  35         struct nf_ct_gre_keymap *keymap[IP_CT_DIR_MAX];
  36 };
  37
  38 struct nf_nat_pptp {
  39         __be16 pns_call_id;                     /* NAT'ed PNS call id */
  40         __be16 pac_call_id;                     /* NAT'ed PAC call id */
  41 };
  42
  43 #ifdef __KERNEL__
  44
  45 #define PPTP_CONTROL_PORT       1723
  46
  47 #define PPTP_PACKET_CONTROL     1
  48 #define PPTP_PACKET_MGMT        2
  49
  50 #define PPTP_MAGIC_COOKIE       0x1a2b3c4d
  51
  52 struct pptp_pkt_hdr {
  53         __u16   packetLength;
  54         __be16  packetType;
  55         __be32  magicCookie;
  56 };
  57
  58 /* PptpControlMessageType values */
  59 #define PPTP_START_SESSION_REQUEST      1
  60 #define PPTP_START_SESSION_REPLY        2
  61 #define PPTP_STOP_SESSION_REQUEST       3
  62 #define PPTP_STOP_SESSION_REPLY         4
  63 #define PPTP_ECHO_REQUEST               5
  64 #define PPTP_ECHO_REPLY                 6
  65 #define PPTP_OUT_CALL_REQUEST           7
  66 #define PPTP_OUT_CALL_REPLY             8
  67 #define PPTP_IN_CALL_REQUEST            9
  68 #define PPTP_IN_CALL_REPLY              10
  69 #define PPTP_IN_CALL_CONNECT            11
  70 #define PPTP_CALL_CLEAR_REQUEST         12
  71 #define PPTP_CALL_DISCONNECT_NOTIFY     13
  72 #define PPTP_WAN_ERROR_NOTIFY           14
  73 #define PPTP_SET_LINK_INFO              15
  74
  75 #define PPTP_MSG_MAX                    15
  76
  77 /* PptpGeneralError values */
  78 #define PPTP_ERROR_CODE_NONE            0
  79 #define PPTP_NOT_CONNECTED              1
  80 #define PPTP_BAD_FORMAT                 2
  81 #define PPTP_BAD_VALUE                  3
  82 #define PPTP_NO_RESOURCE                4
  83 #define PPTP_BAD_CALLID                 5
  84 #define PPTP_REMOVE_DEVICE_ERROR        6
  85
  86 struct PptpControlHeader {
  87         __be16  messageType;
  88         __u16   reserved;
  89 };
  90
  91 /* FramingCapability Bitmap Values */
  92 #define PPTP_FRAME_CAP_ASYNC            0x1
  93 #define PPTP_FRAME_CAP_SYNC             0x2
  94
  95 /* BearerCapability Bitmap Values */
  96 #define PPTP_BEARER_CAP_ANALOG          0x1
  97 #define PPTP_BEARER_CAP_DIGITAL         0x2
  98
  99 struct PptpStartSessionRequest {
 100         __be16  protocolVersion;
 101         __u16   reserved1;
 102         __be32  framingCapability;
 103         __be32  bearerCapability;
 104         __be16  maxChannels;
 105         __be16  firmwareRevision;
 106         __u8    hostName[64];
 107         __u8    vendorString[64];
 108 };
 109
 110 /* PptpStartSessionResultCode Values */
 111 #define PPTP_START_OK                   1
 112 #define PPTP_START_GENERAL_ERROR        2
 113 #define PPTP_START_ALREADY_CONNECTED    3
 114 #define PPTP_START_NOT_AUTHORIZED       4
 115 #define PPTP_START_UNKNOWN_PROTOCOL     5
 116
 117 struct PptpStartSessionReply {
 118         __be16  protocolVersion;
 119         __u8    resultCode;
 120         __u8    generalErrorCode;
 121         __be32  framingCapability;
 122         __be32  bearerCapability;
 123         __be16  maxChannels;
 124         __be16  firmwareRevision;
 125         __u8    hostName[64];
 126         __u8    vendorString[64];
 127 };
 128
 129 /* PptpStopReasons */
 130 #define PPTP_STOP_NONE                  1
 131 #define PPTP_STOP_PROTOCOL              2
 132 #define PPTP_STOP_LOCAL_SHUTDOWN        3
 133
 134 struct PptpStopSessionRequest {
 135         __u8    reason;
 136         __u8    reserved1;
 137         __u16   reserved2;
 138 };
 139
 140 /* PptpStopSessionResultCode */
 141 #define PPTP_STOP_OK                    1
 142 #define PPTP_STOP_GENERAL_ERROR         2
 143
 144 struct PptpStopSessionReply {
 145         __u8    resultCode;
 146         __u8    generalErrorCode;
 147         __u16   reserved1;
 148 };
 149
 150 struct PptpEchoRequest {
 151         __be32 identNumber;
 152 };
 153
 154 /* PptpEchoReplyResultCode */
 155 #define PPTP_ECHO_OK                    1
 156 #define PPTP_ECHO_GENERAL_ERROR         2
 157
 158 struct PptpEchoReply {
 159         __be32  identNumber;
 160         __u8    resultCode;
 161         __u8    generalErrorCode;
 162         __u16   reserved;
 163 };
 164
 165 /* PptpFramingType */
 166 #define PPTP_ASYNC_FRAMING              1
 167 #define PPTP_SYNC_FRAMING               2
 168 #define PPTP_DONT_CARE_FRAMING          3
 169
 170 /* PptpCallBearerType */
 171 #define PPTP_ANALOG_TYPE                1
 172 #define PPTP_DIGITAL_TYPE               2
 173 #define PPTP_DONT_CARE_BEARER_TYPE      3
 174
 175 struct PptpOutCallRequest {
 176         __be16  callID;
 177         __be16  callSerialNumber;
 178         __be32  minBPS;
 179         __be32  maxBPS;
 180         __be32  bearerType;
 181         __be32  framingType;
 182         __be16  packetWindow;
 183         __be16  packetProcDelay;
 184         __be16  phoneNumberLength;
 185         __u16   reserved1;
 186         __u8    phoneNumber[64];
 187         __u8    subAddress[64];
 188 };
 189
 190 /* PptpCallResultCode */
 191 #define PPTP_OUTCALL_CONNECT            1
 192 #define PPTP_OUTCALL_GENERAL_ERROR      2
 193 #define PPTP_OUTCALL_NO_CARRIER         3
 194 #define PPTP_OUTCALL_BUSY               4
 195 #define PPTP_OUTCALL_NO_DIAL_TONE       5
 196 #define PPTP_OUTCALL_TIMEOUT            6
 197 #define PPTP_OUTCALL_DONT_ACCEPT        7
 198
 199 struct PptpOutCallReply {
 200         __be16  callID;
 201         __be16  peersCallID;
 202         __u8    resultCode;
 203         __u8    generalErrorCode;
 204         __be16  causeCode;
 205         __be32  connectSpeed;
 206         __be16  packetWindow;
 207         __be16  packetProcDelay;
 208         __be32  physChannelID;
 209 };
 210
 211 struct PptpInCallRequest {
 212         __be16  callID;
 213         __be16  callSerialNumber;
 214         __be32  callBearerType;
 215         __be32  physChannelID;
 216         __be16  dialedNumberLength;
 217         __be16  dialingNumberLength;
 218         __u8    dialedNumber[64];
 219         __u8    dialingNumber[64];
 220         __u8    subAddress[64];
 221 };
 222
 223 /* PptpInCallResultCode */
 224 #define PPTP_INCALL_ACCEPT              1
 225 #define PPTP_INCALL_GENERAL_ERROR       2
 226 #define PPTP_INCALL_DONT_ACCEPT         3
 227
 228 struct PptpInCallReply {
 229         __be16  callID;
 230         __be16  peersCallID;
 231         __u8    resultCode;
 232         __u8    generalErrorCode;
 233         __be16  packetWindow;
 234         __be16  packetProcDelay;
 235         __u16   reserved;
 236 };
 237
 238 struct PptpInCallConnected {
 239         __be16  peersCallID;
 240         __u16   reserved;
 241         __be32  connectSpeed;
 242         __be16  packetWindow;
 243         __be16  packetProcDelay;
 244         __be32  callFramingType;
 245 };
 246
 247 struct PptpClearCallRequest {
 248         __be16  callID;
 249         __u16   reserved;
 250 };
 251
 252 struct PptpCallDisconnectNotify {
 253         __be16  callID;
 254         __u8    resultCode;
 255         __u8    generalErrorCode;
 256         __be16  causeCode;
 257         __u16   reserved;
 258         __u8    callStatistics[128];
 259 };
 260
 261 struct PptpWanErrorNotify {
 262         __be16  peersCallID;
 263         __u16   reserved;
 264         __be32  crcErrors;
 265         __be32  framingErrors;
 266         __be32  hardwareOverRuns;
 267         __be32  bufferOverRuns;
 268         __be32  timeoutErrors;
 269         __be32  alignmentErrors;
 270 };
 271
 272 struct PptpSetLinkInfo {
 273         __be16  peersCallID;
 274         __u16   reserved;
 275         __be32  sendAccm;
 276         __be32  recvAccm;
 277 };
 278
 279 union pptp_ctrl_union {
 280         struct PptpStartSessionRequest  sreq;
 281         struct PptpStartSessionReply    srep;
 282         struct PptpStopSessionRequest   streq;
 283         struct PptpStopSessionReply     strep;
 284         struct PptpOutCallRequest       ocreq;
 285         struct PptpOutCallReply         ocack;
 286         struct PptpInCallRequest        icreq;
 287         struct PptpInCallReply          icack;
 288         struct PptpInCallConnected      iccon;
 289         struct PptpClearCallRequest     clrreq;
 290         struct PptpCallDisconnectNotify disc;
 291         struct PptpWanErrorNotify       wanerr;
 292         struct PptpSetLinkInfo          setlink;
 293 };
 294
 295 /* crap needed for nf_conntrack_compat.h */
 296 struct nf_conn;
 297 struct nf_conntrack_expect;
 298 enum ip_conntrack_info;
 299
 300 extern int
 301 (*nf_nat_pptp_hook_outbound)(struct sk_buff **pskb,
 302                              struct nf_conn *ct, enum ip_conntrack_info ctinfo,
 303                              struct PptpControlHeader *ctlh,
 304                              union pptp_ctrl_union *pptpReq);
 305
 306 extern int
 307 (*nf_nat_pptp_hook_inbound)(struct sk_buff **pskb,
 308                             struct nf_conn *ct, enum ip_conntrack_info ctinfo,
 309                             struct PptpControlHeader *ctlh,
 310                             union pptp_ctrl_union *pptpReq);
 311
 312 extern void
 313 (*nf_nat_pptp_hook_exp_gre)(struct nf_conntrack_expect *exp_orig,
 314                             struct nf_conntrack_expect *exp_reply);
 315
 316 extern void
 317 (*nf_nat_pptp_hook_expectfn)(struct nf_conn *ct,
 318                              struct nf_conntrack_expect *exp);
 319
 320 #endif /* __KERNEL__ */
 321 #endif /* _NF_CONNTRACK_PPTP_H */