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 #include <linux/netfilter/nf_conntrack_common.h>
   6
   7 /* state of the control session */
   8 enum pptp_ctrlsess_state {
   9         PPTP_SESSION_NONE,                      /* no session present */
  10         PPTP_SESSION_ERROR,                     /* some session error */
  11         PPTP_SESSION_STOPREQ,                   /* stop_sess request seen */
  12         PPTP_SESSION_REQUESTED,                 /* start_sess request seen */
  13         PPTP_SESSION_CONFIRMED,                 /* session established */
  14 };
  15
  16 /* state of the call inside the control session */
  17 enum pptp_ctrlcall_state {
  18         PPTP_CALL_NONE,
  19         PPTP_CALL_ERROR,
  20         PPTP_CALL_OUT_REQ,
  21         PPTP_CALL_OUT_CONF,
  22         PPTP_CALL_IN_REQ,
  23         PPTP_CALL_IN_REP,
  24         PPTP_CALL_IN_CONF,
  25         PPTP_CALL_CLEAR_REQ,
  26 };
  27
  28 /* conntrack private data */
  29 struct nf_ct_pptp_master {
  30         enum pptp_ctrlsess_state sstate;        /* session state */
  31         enum pptp_ctrlcall_state cstate;        /* call state */
  32         __be16 pac_call_id;                     /* call id of PAC */
  33         __be16 pns_call_id;                     /* call id of PNS */
  34
  35         /* in pre-2.6.11 this used to be per-expect. Now it is per-conntrack
  36          * and therefore imposes a fixed limit on the number of maps */
  37         struct nf_ct_gre_keymap *keymap[IP_CT_DIR_MAX];
  38 };
  39
  40 struct nf_nat_pptp {
  41         __be16 pns_call_id;                     /* NAT'ed PNS call id */
  42         __be16 pac_call_id;                     /* NAT'ed PAC call id */
  43 };
  44
  45 #ifdef __KERNEL__
  46
  47 #define PPTP_CONTROL_PORT       1723
  48
  49 #define PPTP_PACKET_CONTROL     1
  50 #define PPTP_PACKET_MGMT        2
  51
  52 #define PPTP_MAGIC_COOKIE       0x1a2b3c4d
  53
  54 struct pptp_pkt_hdr {
  55         __u16   packetLength;
  56         __be16  packetType;
  57         __be32  magicCookie;
  58 };
  59
  60 /* PptpControlMessageType values */
  61 #define PPTP_START_SESSION_REQUEST      1
  62 #define PPTP_START_SESSION_REPLY        2
  63 #define PPTP_STOP_SESSION_REQUEST       3
  64 #define PPTP_STOP_SESSION_REPLY         4
  65 #define PPTP_ECHO_REQUEST               5
  66 #define PPTP_ECHO_REPLY                 6
  67 #define PPTP_OUT_CALL_REQUEST           7
  68 #define PPTP_OUT_CALL_REPLY             8
  69 #define PPTP_IN_CALL_REQUEST            9
  70 #define PPTP_IN_CALL_REPLY              10
  71 #define PPTP_IN_CALL_CONNECT            11
  72 #define PPTP_CALL_CLEAR_REQUEST         12
  73 #define PPTP_CALL_DISCONNECT_NOTIFY     13
  74 #define PPTP_WAN_ERROR_NOTIFY           14
  75 #define PPTP_SET_LINK_INFO              15
  76
  77 #define PPTP_MSG_MAX                    15
  78
  79 /* PptpGeneralError values */
  80 #define PPTP_ERROR_CODE_NONE            0
  81 #define PPTP_NOT_CONNECTED              1
  82 #define PPTP_BAD_FORMAT                 2
  83 #define PPTP_BAD_VALUE                  3
  84 #define PPTP_NO_RESOURCE                4
  85 #define PPTP_BAD_CALLID                 5
  86 #define PPTP_REMOVE_DEVICE_ERROR        6
  87
  88 struct PptpControlHeader {
  89         __be16  messageType;
  90         __u16   reserved;
  91 };
  92
  93 /* FramingCapability Bitmap Values */
  94 #define PPTP_FRAME_CAP_ASYNC            0x1
  95 #define PPTP_FRAME_CAP_SYNC             0x2
  96
  97 /* BearerCapability Bitmap Values */
  98 #define PPTP_BEARER_CAP_ANALOG          0x1
  99 #define PPTP_BEARER_CAP_DIGITAL         0x2
 100
 101 struct PptpStartSessionRequest {
 102         __be16  protocolVersion;
 103         __u16   reserved1;
 104         __be32  framingCapability;
 105         __be32  bearerCapability;
 106         __be16  maxChannels;
 107         __be16  firmwareRevision;
 108         __u8    hostName[64];
 109         __u8    vendorString[64];
 110 };
 111
 112 /* PptpStartSessionResultCode Values */
 113 #define PPTP_START_OK                   1
 114 #define PPTP_START_GENERAL_ERROR        2
 115 #define PPTP_START_ALREADY_CONNECTED    3
 116 #define PPTP_START_NOT_AUTHORIZED       4
 117 #define PPTP_START_UNKNOWN_PROTOCOL     5
 118
 119 struct PptpStartSessionReply {
 120         __be16  protocolVersion;
 121         __u8    resultCode;
 122         __u8    generalErrorCode;
 123         __be32  framingCapability;
 124         __be32  bearerCapability;
 125         __be16  maxChannels;
 126         __be16  firmwareRevision;
 127         __u8    hostName[64];
 128         __u8    vendorString[64];
 129 };
 130
 131 /* PptpStopReasons */
 132 #define PPTP_STOP_NONE                  1
 133 #define PPTP_STOP_PROTOCOL              2
 134 #define PPTP_STOP_LOCAL_SHUTDOWN        3
 135
 136 struct PptpStopSessionRequest {
 137         __u8    reason;
 138         __u8    reserved1;
 139         __u16   reserved2;
 140 };
 141
 142 /* PptpStopSessionResultCode */
 143 #define PPTP_STOP_OK                    1
 144 #define PPTP_STOP_GENERAL_ERROR         2
 145
 146 struct PptpStopSessionReply {
 147         __u8    resultCode;
 148         __u8    generalErrorCode;
 149         __u16   reserved1;
 150 };
 151
 152 struct PptpEchoRequest {
 153         __be32 identNumber;
 154 };
 155
 156 /* PptpEchoReplyResultCode */
 157 #define PPTP_ECHO_OK                    1
 158 #define PPTP_ECHO_GENERAL_ERROR         2
 159
 160 struct PptpEchoReply {
 161         __be32  identNumber;
 162         __u8    resultCode;
 163         __u8    generalErrorCode;
 164         __u16   reserved;
 165 };
 166
 167 /* PptpFramingType */
 168 #define PPTP_ASYNC_FRAMING              1
 169 #define PPTP_SYNC_FRAMING               2
 170 #define PPTP_DONT_CARE_FRAMING          3
 171
 172 /* PptpCallBearerType */
 173 #define PPTP_ANALOG_TYPE                1
 174 #define PPTP_DIGITAL_TYPE               2
 175 #define PPTP_DONT_CARE_BEARER_TYPE      3
 176
 177 struct PptpOutCallRequest {
 178         __be16  callID;
 179         __be16  callSerialNumber;
 180         __be32  minBPS;
 181         __be32  maxBPS;
 182         __be32  bearerType;
 183         __be32  framingType;
 184         __be16  packetWindow;
 185         __be16  packetProcDelay;
 186         __be16  phoneNumberLength;
 187         __u16   reserved1;
 188         __u8    phoneNumber[64];
 189         __u8    subAddress[64];
 190 };
 191
 192 /* PptpCallResultCode */
 193 #define PPTP_OUTCALL_CONNECT            1
 194 #define PPTP_OUTCALL_GENERAL_ERROR      2
 195 #define PPTP_OUTCALL_NO_CARRIER         3
 196 #define PPTP_OUTCALL_BUSY               4
 197 #define PPTP_OUTCALL_NO_DIAL_TONE       5
 198 #define PPTP_OUTCALL_TIMEOUT            6
 199 #define PPTP_OUTCALL_DONT_ACCEPT        7
 200
 201 struct PptpOutCallReply {
 202         __be16  callID;
 203         __be16  peersCallID;
 204         __u8    resultCode;
 205         __u8    generalErrorCode;
 206         __be16  causeCode;
 207         __be32  connectSpeed;
 208         __be16  packetWindow;
 209         __be16  packetProcDelay;
 210         __be32  physChannelID;
 211 };
 212
 213 struct PptpInCallRequest {
 214         __be16  callID;
 215         __be16  callSerialNumber;
 216         __be32  callBearerType;
 217         __be32  physChannelID;
 218         __be16  dialedNumberLength;
 219         __be16  dialingNumberLength;
 220         __u8    dialedNumber[64];
 221         __u8    dialingNumber[64];
 222         __u8    subAddress[64];
 223 };
 224
 225 /* PptpInCallResultCode */
 226 #define PPTP_INCALL_ACCEPT              1
 227 #define PPTP_INCALL_GENERAL_ERROR       2
 228 #define PPTP_INCALL_DONT_ACCEPT         3
 229
 230 struct PptpInCallReply {
 231         __be16  callID;
 232         __be16  peersCallID;
 233         __u8    resultCode;
 234         __u8    generalErrorCode;
 235         __be16  packetWindow;
 236         __be16  packetProcDelay;
 237         __u16   reserved;
 238 };
 239
 240 struct PptpInCallConnected {
 241         __be16  peersCallID;
 242         __u16   reserved;
 243         __be32  connectSpeed;
 244         __be16  packetWindow;
 245         __be16  packetProcDelay;
 246         __be32  callFramingType;
 247 };
 248
 249 struct PptpClearCallRequest {
 250         __be16  callID;
 251         __u16   reserved;
 252 };
 253
 254 struct PptpCallDisconnectNotify {
 255         __be16  callID;
 256         __u8    resultCode;
 257         __u8    generalErrorCode;
 258         __be16  causeCode;
 259         __u16   reserved;
 260         __u8    callStatistics[128];
 261 };
 262
 263 struct PptpWanErrorNotify {
 264         __be16  peersCallID;
 265         __u16   reserved;
 266         __be32  crcErrors;
 267         __be32  framingErrors;
 268         __be32  hardwareOverRuns;
 269         __be32  bufferOverRuns;
 270         __be32  timeoutErrors;
 271         __be32  alignmentErrors;
 272 };
 273
 274 struct PptpSetLinkInfo {
 275         __be16  peersCallID;
 276         __u16   reserved;
 277         __be32  sendAccm;
 278         __be32  recvAccm;
 279 };
 280
 281 union pptp_ctrl_union {
 282         struct PptpStartSessionRequest  sreq;
 283         struct PptpStartSessionReply    srep;
 284         struct PptpStopSessionRequest   streq;
 285         struct PptpStopSessionReply     strep;
 286         struct PptpOutCallRequest       ocreq;
 287         struct PptpOutCallReply         ocack;
 288         struct PptpInCallRequest        icreq;
 289         struct PptpInCallReply          icack;
 290         struct PptpInCallConnected      iccon;
 291         struct PptpClearCallRequest     clrreq;
 292         struct PptpCallDisconnectNotify disc;
 293         struct PptpWanErrorNotify       wanerr;
 294         struct PptpSetLinkInfo          setlink;
 295 };
 296
 297 /* crap needed for nf_conntrack_compat.h */
 298 struct nf_conn;
 299 struct nf_conntrack_expect;
 300
 301 extern int
 302 (*nf_nat_pptp_hook_outbound)(struct sk_buff **pskb,
 303                              struct nf_conn *ct, enum ip_conntrack_info ctinfo,
 304                              struct PptpControlHeader *ctlh,
 305                              union pptp_ctrl_union *pptpReq);
 306
 307 extern int
 308 (*nf_nat_pptp_hook_inbound)(struct sk_buff **pskb,
 309                             struct nf_conn *ct, enum ip_conntrack_info ctinfo,
 310                             struct PptpControlHeader *ctlh,
 311                             union pptp_ctrl_union *pptpReq);
 312
 313 extern void
 314 (*nf_nat_pptp_hook_exp_gre)(struct nf_conntrack_expect *exp_orig,
 315                             struct nf_conntrack_expect *exp_reply);
 316
 317 extern void
 318 (*nf_nat_pptp_hook_expectfn)(struct nf_conn *ct,
 319                              struct nf_conntrack_expect *exp);
 320
 321 #endif /* __KERNEL__ */
 322 #endif /* _NF_CONNTRACK_PPTP_H */