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