toxproto.d

   1 /* coded by Ketmar // Invisible Vector <ketmar@ketmar.no-ip.org>
   2  * Understanding is not required. Only obedience.
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 // Tox protocol thread
  18 // Each Tox connection spawns a thread that does all the communication.
  19 // Incoming messages are posted to [glconCtlWindow].
  20 // Asking for outgoing actions are done with public interface.
  21 // No tox internals are exposed to the outer world.
  22 module toxproto is aliced;
  23 private:
  24
  25 import core.time;
  26
  27 import std.concurrency;
  28 import std.datetime;
  29
  30 import iv.cmdcon;
  31 import iv.cmdcon.gl;
  32 import iv.strex;
  33 import iv.tox;
  34 import iv.txtser;
  35 import iv.unarray;
  36 import iv.utfutil;
  37 import iv.vfs;
  38 import iv.vfs.util;
  39
  40 import accdb;
  41
  42 //version = ToxCoreDebug;
  43 version = ToxCoreUseBuiltInDataFileParser;
  44
  45 static assert(TOX_PUBLIC_KEY_SIZE == ToxSavedFriend.CRYPTO_PUBLIC_KEY_SIZE);
  46
  47 import iv.vfs;
  48 import accdb : ContactStatus, ContactInfo;
  49
  50
  51 // ////////////////////////////////////////////////////////////////////////// //
  52 public:
  53
  54
  55 ///
  56 struct ToxCoreDataFile {
  57   string nick; // user nick
  58   string statusmsg;
  59   ubyte[TOX_PUBLIC_KEY_SIZE] pubkey = toxCoreEmptyKey;
  60   ToxAddr addr = toxCoreEmptyAddr;
  61   uint nospam;
  62   ContactStatus status = ContactStatus.Offline;
  63
  64   ContactInfo[] friends;
  65
  66   @property bool valid () const pure nothrow @safe @nogc => isValidKey(pubkey);
  67
  68   static ToxAddr buildAddress (in ref ubyte[TOX_PUBLIC_KEY_SIZE] pubkey, uint nospam) nothrow @trusted @nogc {
  69     static ushort calcChecksum (const(ubyte)[] data) nothrow @trusted @nogc {
  70       ubyte[2] checksum = 0;
  71       foreach (immutable idx, ubyte b; data) checksum[idx%2] ^= b;
  72       return *cast(ushort*)checksum.ptr;
  73     }
  74
  75     ToxAddr res = void;
  76     res[0..TOX_PUBLIC_KEY_SIZE] = pubkey[];
  77     *cast(uint*)(res.ptr+TOX_PUBLIC_KEY_SIZE) = nospam;
  78     *cast(ushort*)(res.ptr+TOX_PUBLIC_KEY_SIZE+uint.sizeof) = calcChecksum(res[0..$-2]);
  79     return res[];
  80   }
  81 }
  82
  83
  84 // ////////////////////////////////////////////////////////////////////////// //
  85 ///
  86 class ProtocolException : Exception {
  87   this (string msg, string file=__FILE__, usize line=__LINE__, Throwable next=null) pure nothrow @safe @nogc {
  88     super(msg, file, line, next);
  89   }
  90 }
  91
  92
  93 // ////////////////////////////////////////////////////////////////////////// //
  94 // messages thread sends to [glconCtlWindow].
  95 // [who] can be the same as [self] to indicate account state changes
  96
  97 class ToxEventBase {
  98   PubKey self; // account
  99   PubKey who; // can be same as [self]
 100 nothrow @trusted @nogc:
 101   this (in ref PubKey aself, in ref PubKey awho) { self[] = aself[]; who = awho[]; }
 102 }
 103
 104 // connection state changed
 105 class ToxEventConnection : ToxEventBase {
 106   bool connected;
 107 nothrow @trusted @nogc:
 108   this (in ref PubKey aself, in ref PubKey awho, bool aconnected) { super(aself, awho); connected = aconnected; }
 109 }
 110
 111 // online status changed
 112 class ToxEventStatus : ToxEventBase {
 113   ContactStatus status;
 114 nothrow @trusted @nogc:
 115   this (in ref PubKey aself, in ref PubKey awho, ContactStatus astatus) { super(aself, awho); status = astatus; }
 116 }
 117
 118 // nick changed
 119 class ToxEventNick : ToxEventBase {
 120   string nick; // new nick
 121 nothrow @trusted @nogc:
 122   this (in ref PubKey aself, in ref PubKey awho, string anick) { super(aself, awho); nick = anick; }
 123 }
 124
 125 // status message changed
 126 class ToxEventStatusMsg : ToxEventBase {
 127   string message; // new message
 128 nothrow @trusted @nogc:
 129   this (in ref PubKey aself, in ref PubKey awho, string amessage) { super(aself, awho); message = amessage; }
 130 }
 131
 132 // typing status changed
 133 class ToxEventTyping : ToxEventBase {
 134   bool typing;
 135 nothrow @trusted @nogc:
 136   this (in ref PubKey aself, in ref PubKey awho, bool atyping) { super(aself, awho); typing = atyping; }
 137 }
 138
 139 // new message comes
 140 class ToxEventMessage : ToxEventBase {
 141   bool action; // is this an "action" message? (/me)
 142   string message;
 143   SysTime time;
 144
 145   this (in ref PubKey aself, in ref PubKey awho, bool aaction, string amessage) {
 146     super(aself, awho);
 147     action = aaction;
 148     message = amessage;
 149     time = systimeNow;
 150   }
 151
 152   this (in ref PubKey aself, in ref PubKey awho, bool aaction, string amessage, SysTime atime) {
 153     super(aself, awho);
 154     action = aaction;
 155     message = amessage;
 156     time = atime;
 157   }
 158 }
 159
 160 // send message ack comes
 161 class ToxEventMessageAck : ToxEventBase {
 162   long msgid;
 163 nothrow @trusted @nogc:
 164   this (in ref PubKey aself, in ref PubKey awho, long amsgid) { super(aself, awho); msgid = amsgid; }
 165 }
 166
 167 // friend request comes
 168 class ToxEventFriendReq : ToxEventBase {
 169   string message; // request message
 170 nothrow @trusted @nogc:
 171   this (in ref PubKey aself, in ref PubKey awho, string amessage) { super(aself, awho); message = amessage; }
 172 }
 173
 174
 175 // ////////////////////////////////////////////////////////////////////////// //
 176
 177 /// shutdown protocol module
 178 void toxCoreShutdownAll () {
 179   int acksLeft = 0;
 180   synchronized(TPInfo.classinfo) {
 181     foreach (TPInfo ti; allProtos) {
 182       ti.tid.send(TrdCmdQuit.init);
 183       ++acksLeft;
 184     }
 185   }
 186   while (acksLeft > 0) {
 187     receive(
 188       (TrdCmdQuitAck ack) { --acksLeft; },
 189       (Variant v) {},
 190     );
 191   }
 192
 193   foreach (TPInfo tpi; allProtos) {
 194     // save toxcode data, if there is any
 195     if (tpi.tox !is null && tpi.toxDataDiskName.length) saveToxCoreData(tpi.tox, tpi.toxDataDiskName);
 196     if (tpi.tox !is null) { tox_kill(tpi.tox); tpi.tox = null; }
 197   }
 198 }
 199
 200
 201 // ////////////////////////////////////////////////////////////////////////// //
 202
 203 ///
 204 static immutable PubKey toxCoreEmptyKey = 0;
 205 static immutable ToxAddr toxCoreEmptyAddr = 0;
 206
 207 /// delegate that will be used to send messages.
 208 /// can be called from any thread, so it should be thread-safe, and should avoid deadlocks.
 209 /// the delegate should be set on program startup, and should not be changed anymore.
 210 /// FIXME: add API to change this!
 211 __gshared void delegate (Object msg) nothrow toxCoreSendEvent;
 212
 213 ///
 214 bool isValidKey (in ref PubKey key) pure nothrow @safe @nogc => (key[] != toxCoreEmptyKey[]);
 215
 216 ///
 217 bool isValidAddr (in ref ToxAddr key) pure nothrow @safe @nogc => (key[] != toxCoreEmptyAddr[]);
 218
 219
 220 /// parse toxcore data file.
 221 /// sorry, i had to do it manually, 'cause there is no way to open toxcore data without going online.
 222 public ToxCoreDataFile toxCoreLoadDataFile (VFile fl) nothrow {
 223   ToxCoreDataFile res;
 224   try {
 225     version(ToxCoreUseBuiltInDataFileParser) {
 226       auto sz = fl.size-fl.tell;
 227       if (sz < 8) throw new ProtocolException("data file too small");
 228       if (fl.readNum!uint != 0) throw new ProtocolException("invalid something");
 229       if (fl.readNum!uint != ToxCoreDataId) throw new ProtocolException("not a ToxCore data file");
 230       while (sz >= 8) {
 231         auto len = fl.readNum!uint;
 232         auto id = fl.readNum!uint;
 233         if (id>>16 != ToxCoreChunkTypeHi) throw new ProtocolException("invalid chunk hitype");
 234         id &= 0xffffU;
 235         switch (id) {
 236           case ToxCoreChunkNoSpamKeys:
 237             if (len == ToxSavedFriend.CRYPTO_PUBLIC_KEY_SIZE+ToxSavedFriend.CRYPTO_SECRET_KEY_SIZE+uint.sizeof) {
 238               res.nospam = fl.readNum!uint;
 239               fl.rawReadExact(res.pubkey[]);
 240               ubyte[ToxSavedFriend.CRYPTO_PUBLIC_KEY_SIZE] privkey;
 241               fl.rawReadExact(privkey[]);
 242               privkey[] = 0;
 243               len = 0;
 244               res.addr[] = res.buildAddress(res.pubkey, res.nospam);
 245             }
 246             break;
 247           case ToxCoreChunkDHT: break;
 248           case ToxCoreChunkFriends:
 249             if (len%ToxSavedFriend.TOTAL_DATA_SIZE != 0) throw new ProtocolException("invalid contact list");
 250             while (len > 0) {
 251               ToxSavedFriend fr;
 252               auto st = fl.tell;
 253               fr.load(fl);
 254               st = fl.tell-st;
 255               if (st > len || st != ToxSavedFriend.TOTAL_DATA_SIZE) throw new ProtocolException("invalid contact list");
 256               len -= cast(uint)st;
 257               if (fr.status == ToxSavedFriend.Status.NoFriend) continue;
 258               ContactInfo ci;
 259               ci.nick = fr.name[0..fr.name_length].idup;
 260               ci.lastonlinetime = cast(uint)fr.last_seen_time;
 261               final switch (fr.status) {
 262                 case ToxSavedFriend.Status.NoFriend: assert(0, "wtf?!");
 263                 // or vice versa?
 264                 case ToxSavedFriend.Status.Added: ci.kind = ContactInfo.Kind.PengingAuthAccept; break;
 265                 case ToxSavedFriend.Status.Requested: ci.kind = ContactInfo.Kind.PengingAuthRequest; break;
 266                 case ToxSavedFriend.Status.Confirmed:
 267                 case ToxSavedFriend.Status.Online:
 268                   ci.kind = ContactInfo.Kind.Friend;
 269                   break;
 270               }
 271               if (ci.kind != ContactInfo.Kind.Friend) {
 272                 ci.statusmsg = fr.info[0..fr.info_size].idup;
 273               } else {
 274                 ci.statusmsg = fr.statusmessage[0..fr.statusmessage_length].idup;
 275               }
 276               ci.nospam = fr.friendrequest_nospam;
 277               ci.pubkey[] = fr.real_pk[];
 278               res.friends ~= ci;
 279             }
 280             break;
 281           case ToxCoreChunkName:
 282             if (len) {
 283               auto name = new char[](len);
 284               fl.rawReadExact(name);
 285               len = 0;
 286               res.nick = cast(string)name; // it is safe to cast here
 287             }
 288             break;
 289           case ToxCoreChunkStatusMsg:
 290             if (len) {
 291               auto msg = new char[](len);
 292               fl.rawReadExact(msg);
 293               len = 0;
 294               res.statusmsg = cast(string)msg; // it is safe to cast here
 295             }
 296             break;
 297           case ToxCoreChunkStatus:
 298             if (len == 1) {
 299               auto st = fl.readNum!ubyte;
 300               if (st < ToxSavedFriend.UserStatus.Invalid) {
 301                 switch (st) {
 302                   case ToxSavedFriend.UserStatus.None: res.status = ContactStatus.Online; break;
 303                   case ToxSavedFriend.UserStatus.Away: res.status = ContactStatus.Away; break;
 304                   case ToxSavedFriend.UserStatus.Busy: res.status = ContactStatus.Busy; break;
 305                   default: res.status = ContactStatus.Offline; break;
 306                 }
 307               }
 308               len = 0;
 309             }
 310             break;
 311           case ToxCoreChunkTcpRelay: break;
 312           case ToxCoreChunkPathNode: break;
 313           default: break;
 314         }
 315         if (id == ToxCoreChunkEnd) break;
 316         fl.seek(len, Seek.Cur);
 317       }
 318     } else {
 319       // nope, not found, try to open account
 320       ProtoOptions protoOpts;
 321       auto tox = toxCreateInstance(toxdatafname, protoOpts, allowNew:false);
 322       if (tox is null) throw new ProtocolException("cannot load toxcore data file");
 323       scope(exit) tox_kill(tox); // and immediately kill it, or it will go online. fuck.
 324
 325       tox_self_get_public_key(tox, res.pubkey.ptr);
 326       tox_self_get_address(tox, res.addr.ptr);
 327       res.nospam = tox_self_get_nospam(tox);
 328
 329       // get user name
 330       auto nsz = tox_self_get_name_size(tox);
 331       if (nsz != 0) {
 332         if (nsz > tox_max_name_length()) nsz = tox_max_name_length(); // just in case
 333         auto xbuf = new char[](tox_max_name_length());
 334         xbuf[] = 0;
 335         tox_self_get_name(tox, xbuf.ptr);
 336         res.nick = cast(string)(xbuf[0..nsz]); // ah, cast it directly here
 337       }
 338
 339       auto msz = tox_self_get_status_message_size(tox);
 340       if (msz != 0) {
 341         if (msz > tox_max_status_message_length()) msz = tox_max_status_message_length(); // just in case
 342         auto xbuf = new char[](tox_max_status_message_length());
 343         xbuf[] = 0;
 344         tox_self_get_status_message(tox, xbuf.ptr);
 345         res.statusmsg = cast(string)(xbuf[0..nsz]); // ah, cast it directly here
 346       }
 347
 348       // TODO: online status, friend list
 349       assert(0, "not finished");
 350     }
 351   } catch (Exception e) {
 352     res = res.init;
 353   }
 354   return res;
 355 }
 356
 357
 358 /// returns public key for account with the given data file, or [toxCoreEmptyKey].
 359 PubKey toxCoreGetAccountPubKey (const(char)[] toxdatafname) nothrow {
 360   version(ToxCoreUseBuiltInDataFileParser) {
 361     try {
 362       auto data = toxCoreLoadDataFile(VFile(toxdatafname));
 363       if (isValidKey(data.pubkey)) return data.pubkey[];
 364     } catch (Exception e) {}
 365   } else {
 366     TPInfo tacc = null;
 367     synchronized(TPInfo.classinfo) {
 368       foreach (TPInfo ti; allProtos) if (ti.toxDataDiskName == toxdatafname) { tacc = ti; break; }
 369       // not found?
 370       if (tacc is null) {
 371         // nope, not found, try to open account
 372         ProtoOptions protoOpts;
 373         auto tox = toxCreateInstance(toxdatafname, protoOpts, allowNew:false);
 374         if (tox is null) return toxCoreEmptyKey;
 375         PubKey self; tox_self_get_public_key(tox, self.ptr);
 376         // and immediately kill it, or it will go online. fuck.
 377         tox_kill(tox);
 378         return self[];
 379       }
 380     }
 381     if (tacc !is null) {
 382       synchronized(tacc) {
 383         PubKey self; tox_self_get_public_key(tacc.tox, self.ptr);
 384         return self[];
 385       }
 386     }
 387   }
 388   return toxCoreEmptyKey;
 389 }
 390
 391
 392 /// returns address public key for account with the given data file, or [toxCoreEmptyKey].
 393 ToxAddr toxCoreGetAccountAddress (const(char)[] toxdatafname) nothrow {
 394   version(ToxCoreUseBuiltInDataFileParser) {
 395     try {
 396       auto data = toxCoreLoadDataFile(VFile(toxdatafname));
 397       if (isValidKey(data.pubkey)) return data.addr[];
 398     } catch (Exception e) {}
 399   } else {
 400     TPInfo tacc = null;
 401     synchronized(TPInfo.classinfo) {
 402       foreach (TPInfo ti; allProtos) if (ti.toxDataDiskName == toxdatafname) { tacc = ti; break; }
 403       // not found?
 404       if (tacc is null) {
 405         // nope, not found, try to open account
 406         ProtoOptions protoOpts;
 407         auto tox = toxCreateInstance(toxdatafname, protoOpts, allowNew:false);
 408         if (tox is null) return toxCoreEmptyAddr;
 409         ToxAddr addr; tox_self_get_address(tox, addr.ptr);
 410         // and immediately kill it, or it will go online. fuck.
 411         tox_kill(tox);
 412         return addr[];
 413       }
 414     }
 415     if (tacc !is null) {
 416       synchronized(tacc) {
 417         ToxAddr res;
 418         if (tacc.tox is null) {
 419           res[] = tacc.addr[];
 420         } else {
 421           tox_self_get_address(ti.tox, res.ptr);
 422         }
 423         return res[];
 424       }
 425     }
 426   }
 427   return toxCoreEmptyAddr;
 428 }
 429
 430
 431 /// returns address that can be given to other people, so they can friend you.
 432 /// returns zero-filled array on invalid request.
 433 ToxAddr toxCoreGetSelfAddress (in ref PubKey self) nothrow {
 434   ToxAddr res = 0;
 435   doWithLockedTPByKey(self, delegate (ti) {
 436     if (ti.tox is null) {
 437       res[] = ti.addr[];
 438     } else {
 439       tox_self_get_address(ti.tox, res.ptr);
 440     }
 441   });
 442   return res[];
 443 }
 444
 445
 446 /// checks if we have a working thread for `self`.
 447 bool toxCoreIsAccountOpen (in ref PubKey self) nothrow {
 448   synchronized(TPInfo.classinfo) {
 449     foreach (TPInfo ti; allProtos) {
 450       if (ti.self[] == self[]) return true;
 451     }
 452   }
 453   return false;
 454 }
 455
 456
 457 /// returns nick for the given account, or `null`.
 458 string toxCoreGetNick (in ref PubKey self) nothrow {
 459   synchronized(TPInfo.classinfo) {
 460     foreach (TPInfo ti; allProtos) {
 461       if (ti.self[] == self[]) return ti.nick;
 462     }
 463   }
 464   return null;
 465 }
 466
 467
 468 /// creates new Tox account (or opens old), stores it in data file, returns public key for new account.
 469 /// returns [toxCoreEmptyKey] on error.
 470 /// TODO: pass protocol options here
 471 /// WARNING! don't call this from more than one thread with the same `toxdatafname`
 472 PubKey toxCoreCreateAccount (const(char)[] toxdatafname, const(char)[] nick) nothrow {
 473   if (toxdatafname.length == 0) return toxCoreEmptyKey;
 474
 475   if (nick.length == 0 || nick.length > tox_max_name_length()) return toxCoreEmptyKey;
 476
 477   try {
 478     import std.path : absolutePath;
 479
 480     string toxDataDiskName = toxdatafname.idup.absolutePath;
 481
 482     synchronized(TPInfo.classinfo) {
 483       foreach (TPInfo ti; allProtos) {
 484         if (ti.toxDataDiskName == toxDataDiskName) return ti.self[];
 485       }
 486     }
 487
 488     ProtoOptions protoOpts;
 489     protoOpts.udp = true;
 490
 491     auto tox = toxCreateInstance(toxdatafname, protoOpts, allowNew:true);
 492     if (tox is null) return toxCoreEmptyKey;
 493
 494     auto ti = new TPInfo();
 495     ti.toxDataDiskName = toxDataDiskName;
 496     tox_self_get_public_key(tox, ti.self.ptr);
 497     tox_self_get_address(tox, ti.addr.ptr);
 498     ti.nick = nick.idup;
 499
 500     // set user name
 501     tox_self_set_name(tox, nick.ptr, nick.length);
 502     saveToxCoreData(tox, toxDataDiskName);
 503
 504     // and immediately kill it, or it will go online. fuck.
 505     tox_kill(tox);
 506
 507     synchronized(TPInfo.classinfo) {
 508       allProtos ~= ti;
 509       startThread(ti);
 510     }
 511     return ti.self[];
 512   } catch (Exception e) {
 513   }
 514
 515   return toxCoreEmptyKey;
 516 }
 517
 518
 519 /// starts working thread for account with the given data file.
 520 /// returns account public key, or [toxCoreEmptyKey] on error.
 521 /// TODO: pass protocol options here
 522 /// WARNING! don't call this from more than one thread with the same `toxdatafname`
 523 PubKey toxCoreOpenAccount (const(char)[] toxdatafname) nothrow {
 524   if (toxdatafname.length == 0) return toxCoreEmptyKey;
 525
 526   try {
 527     import std.path : absolutePath, dirName;
 528
 529     string toxDataDiskName = toxdatafname.idup.absolutePath;
 530
 531     synchronized(TPInfo.classinfo) {
 532       foreach (TPInfo ti; allProtos) {
 533         if (ti.toxDataDiskName == toxDataDiskName) return ti.self[];
 534       }
 535     }
 536
 537     version(ToxCoreUseBuiltInDataFileParser) {
 538       // manual parsing
 539       auto data = toxCoreLoadDataFile(VFile(toxDataDiskName));
 540       if (!isValidKey(data.pubkey)) return toxCoreEmptyKey;
 541
 542       auto ti = new TPInfo();
 543       ti.toxDataDiskName = toxDataDiskName;
 544       ti.self[] = data.pubkey[];
 545       ti.addr[] = data.addr[];
 546       ti.nick = data.nick;
 547     } else {
 548       // use toxcore to parse data file
 549       ProtoOptions protoOpts;
 550       try {
 551         protoOpts.txtunser(VFile(toxDataDiskName.dirName~"/proto.rc"));
 552       } catch (Exception e) {
 553         protoOpts = protoOpts.default;
 554         protoOpts.udp = true;
 555       }
 556
 557       auto tox = toxCreateInstance(toxdatafname, protoOpts, allowNew:false);
 558       if (tox is null) return toxCoreEmptyKey;
 559       PubKey self; tox_self_get_public_key(tox, self.ptr);
 560
 561       auto ti = new TPInfo();
 562       ti.toxDataDiskName = toxDataDiskName;
 563       tox_self_get_public_key(tox, ti.self.ptr);
 564       tox_self_get_address(tox, ti.addr.ptr);
 565
 566       // get user name
 567       auto nsz = tox_self_get_name_size(tox);
 568       if (nsz != 0) {
 569         if (nsz > tox_max_name_length()) nsz = tox_max_name_length(); // just in case
 570         // k8: toxcore developers are idiots, so we have to do dynalloc here
 571         auto xbuf = new char[](tox_max_name_length());
 572         xbuf[] = 0;
 573         tox_self_get_name(tox, xbuf.ptr);
 574         ti.nick = cast(string)(xbuf[0..nsz]); // ah, cast it directly here
 575       }
 576
 577       // and immediately kill it, or it will go online. fuck.
 578       tox_kill(tox);
 579     }
 580
 581     synchronized(TPInfo.classinfo) {
 582       allProtos ~= ti;
 583       startThread(ti);
 584     }
 585
 586     return ti.self[];
 587   } catch (Exception e) {
 588   }
 589
 590   return toxCoreEmptyKey;
 591 }
 592
 593
 594 /// stops working thread for account with the given data file.
 595 /// returns success flag.
 596 bool toxCoreCloseAccount (in ref PubKey self) nothrow {
 597   try {
 598     TPInfo tpi = null;
 599     synchronized(TPInfo.classinfo) {
 600       foreach (TPInfo ti; allProtos) if (ti.self[] == self[]) { tpi = ti; break; }
 601     }
 602     if (tpi is null) return false;
 603
 604     // send "quit" signal
 605     tpi.tid.send(TrdCmdQuit.init);
 606     for (;;) {
 607       bool done = false;
 608       receive(
 609         (TrdCmdQuitAck ack) { done = true; },
 610         (Variant v) {},
 611       );
 612       if (done) break;
 613     }
 614
 615     // save toxcode data, if there is any
 616     if (tpi.tox !is null && tpi.toxDataDiskName.length) saveToxCoreData(tpi.tox, tpi.toxDataDiskName);
 617     if (tpi.tox !is null) { tox_kill(tpi.tox); tpi.tox = null; }
 618
 619     // remove from the list
 620     synchronized(TPInfo.classinfo) {
 621       foreach (immutable idx, TPInfo ti; allProtos) {
 622         if (ti.self[] == self[]) {
 623           foreach (immutable c; idx+1..allProtos.length) allProtos[c-1] = allProtos[c];
 624           delete allProtos[$-1];
 625           allProtos.length -= 1;
 626           allProtos.assumeSafeAppend;
 627           break;
 628         }
 629       }
 630     }
 631
 632     return true;
 633   } catch (Exception e) {
 634   }
 635   return false;
 636 }
 637
 638
 639 enum MsgIdError = -1;
 640 enum MsgIdOffline = 0;
 641
 642 /// sends message. returns message id that can be used to track acks.
 643 /// returns [MsgIdError] for unknown account, or unknown `dest`.
 644 /// returns [MsgIdOffline] if `self` or `dest` is offline (message is not queued to send in this case).
 645 /// note that `0` is a not a valid message id.
 646 /// cannot send empty messages, and messages longer than `TOX_MAX_MESSAGE_LENGTH` chars.
 647 long toxCoreSendMessage (in ref PubKey self, in ref PubKey dest, const(char)[] msg, bool action=false) nothrow {
 648   long res = MsgIdError;
 649   if (msg.length == 0) return res; // cannot send empty messages
 650   TOX_MESSAGE_TYPE tt = (action ? TOX_MESSAGE_TYPE_ACTION : TOX_MESSAGE_TYPE_NORMAL);
 651   /*
 652   if (msg.startsWith("/me ")) {
 653     msg = msg[4..$].xstripleft;
 654     if (msg.length == 0) return res; // cannot send empty messages
 655     tt = TOX_MESSAGE_TYPE_ACTION;
 656   }
 657   */
 658   if (msg.length > tox_max_message_length()) return res; // message too long
 659   doWithLockedTPByKey(self, delegate (ti) {
 660     if (ti.tox is null) { res = MsgIdOffline; return; }
 661     //if (tox_self_get_connection_status(ti.tox) == TOX_CONNECTION_NONE) { res = MsgIdOffline; return; }
 662     // find friend
 663     uint frnum = tox_friend_by_public_key(ti.tox, dest.ptr);
 664     if (frnum == uint.max) return; // error
 665     // offline?
 666     //if (tox_friend_get_connection_status(ti.tox, frnum) == TOX_CONNECTION_NONE) { res = MsgIdOffline; return; }
 667     // nope, online; queue the message
 668     TOX_ERR_FRIEND_SEND_MESSAGE err = 0;
 669     uint msgid = tox_friend_send_message(ti.tox, frnum, tt, msg.ptr, msg.length, &err);
 670     switch (err) {
 671       case TOX_ERR_FRIEND_SEND_MESSAGE_OK: res = (cast(long)msgid)+1; break;
 672       case TOX_ERR_FRIEND_SEND_MESSAGE_NULL: res = MsgIdError; break;
 673       case TOX_ERR_FRIEND_SEND_MESSAGE_FRIEND_NOT_FOUND: res = MsgIdError; break;
 674       case TOX_ERR_FRIEND_SEND_MESSAGE_FRIEND_NOT_CONNECTED: res = MsgIdOffline; break;
 675       case TOX_ERR_FRIEND_SEND_MESSAGE_SENDQ: res = MsgIdError; break;
 676       case TOX_ERR_FRIEND_SEND_MESSAGE_TOO_LONG: res = MsgIdError; break;
 677       case TOX_ERR_FRIEND_SEND_MESSAGE_EMPTY: res = MsgIdError; break;
 678       default: res = MsgIdError; break;
 679     }
 680     if (res > 0) ti.ping();
 681   });
 682   return res;
 683 }
 684
 685
 686 /// sets new status.
 687 /// returns `false` if `self` is invalid, or some error occured.
 688 bool toxCoreSetStatus (in ref PubKey self, ContactStatus status) nothrow {
 689   if (status == ContactStatus.Connecting) return false; // oops
 690   bool res = false;
 691   doWithLockedTPByKey(self, delegate (ti) {
 692     // if we're going offline, kill toxcore instance
 693     if (status == ContactStatus.Offline) {
 694       ti.tid.send(TrdCmdKillToxCore.init);
 695       // send messages, just in case
 696       if (toxCoreSendEvent !is null) {
 697         toxCoreSendEvent(new ToxEventStatus(ti.self, ti.self, ContactStatus.Offline));
 698         toxCoreSendEvent(new ToxEventConnection(ti.self, ti.self, false));
 699       }
 700       res = true;
 701       return;
 702     }
 703
 704     ToxP tox;
 705
 706     // want to go online
 707     if (ti.tox is null) {
 708       // need to create toxcore object
 709       try {
 710         import std.path : absolutePath, dirName;
 711
 712         ProtoOptions protoOpts;
 713         try {
 714           protoOpts.txtunser(VFile(ti.toxDataDiskName.dirName~"/proto.rc"));
 715         } catch (Exception e) {
 716           protoOpts = protoOpts.default;
 717           protoOpts.udp = true;
 718         }
 719
 720         conwriteln("creating ToxCore...");
 721         tox = toxCreateInstance(ti.toxDataDiskName, protoOpts, allowNew:false);
 722         if (tox is null) {
 723           conwriteln("can't create ToxCore...");
 724           return;
 725         }
 726         TrdCmdSetToxCore cmd;
 727         cmd.tox = tox;
 728         ti.tid.send(cast(shared)cmd);
 729       } catch (Exception e) {
 730         return;
 731       }
 732     } else {
 733       tox = ti.tox;
 734     }
 735     assert(tox !is null);
 736
 737     TOX_USER_STATUS st;
 738     final switch (status) {
 739       case ContactStatus.Offline: assert(0, "wtf?!");
 740       case ContactStatus.Online: st = TOX_USER_STATUS_NONE; break;
 741       case ContactStatus.Away: st = TOX_USER_STATUS_AWAY; break;
 742       case ContactStatus.Busy: st = TOX_USER_STATUS_BUSY; break;
 743       case ContactStatus.Connecting: assert(0, "wtf?!");
 744     }
 745     tox_self_set_status(tox, st);
 746     ti.needSave = true;
 747     res = true;
 748     ti.ping();
 749   });
 750   return res;
 751 }
 752
 753
 754 /// sets new status message.
 755 /// returns `false` if `self` is invalid, message is too long, or on any other error.
 756 bool toxCoreSetStatusMessage (in ref PubKey self, const(char)[] message) nothrow {
 757   if (message.length > tox_max_status_message_length()) return false;
 758   bool res = false;
 759   doWithLockedTPByKey(self, delegate (ti) {
 760     if (ti.tox is null) return;
 761     res = tox_self_set_status_message(ti.tox, message.ptr, message.length);
 762     if (res) ti.needSave = true;
 763     if (res) ti.ping();
 764   });
 765   return res;
 766 }
 767
 768
 769 /// sends friend request.
 770 /// returns `false` if `self` is invalid, message is too long, or on any other error.
 771 bool toxCoreSendFriendRequest (in ref PubKey self, in ref ToxAddr dest, const(char)[] message) nothrow {
 772   if (message.length > tox_max_friend_request_length()) return false; // cannot send long requests
 773   bool res = false;
 774   doWithLockedTPByKey(self, delegate (ti) {
 775     if (ti.tox is null) return; // this account is offline
 776     //if (tox_self_get_connection_status(ti.tox) == TOX_CONNECTION_NONE) return; // this account is offline
 777     // find friend
 778     uint frnum = tox_friend_by_public_key(ti.tox, dest.ptr);
 779     if (frnum != uint.max) {
 780       // we already befriend it, do nothing
 781       res = true;
 782       return;
 783     }
 784     frnum = tox_friend_add(ti.tox, dest.ptr, message.ptr, message.length);
 785     res = (frnum != uint.max);
 786     if (res) ti.needSave = true;
 787     if (res) ti.ping();
 788   });
 789   return res;
 790 }
 791
 792
 793 /// unconditionally adds a friend.
 794 /// returns `false` if `self` is invalid, message is too long, friend not found, or on any other error.
 795 bool toxCoreAddFriend (in ref PubKey self, in ref PubKey dest) nothrow {
 796   bool res = false;
 797   doWithLockedTPByKey(self, delegate (ti) {
 798     if (ti.tox is null) return; // this account is offline
 799     //if (tox_self_get_connection_status(ti.tox) == TOX_CONNECTION_NONE) return; // this account is offline
 800     // find friend
 801     uint frnum = tox_friend_by_public_key(ti.tox, dest.ptr);
 802     if (frnum != uint.max) {
 803       // we already has such friend, do nothing
 804       res = true;
 805       return;
 806     }
 807     frnum = tox_friend_add_norequest(ti.tox, dest.ptr);
 808     res = (frnum != uint.max);
 809     if (res) ti.needSave = true;
 810     if (res) ti.ping();
 811   });
 812   return res;
 813 }
 814
 815
 816 /// unconditionally removes a friend.
 817 /// returns `false` if `self` is invalid, message is too long, friend not found, or on any other error.
 818 bool toxCoreRemoveFriend (in ref PubKey self, in ref PubKey dest) nothrow {
 819   bool res = false;
 820   doWithLockedTPByKey(self, delegate (ti) {
 821     if (ti.tox is null) return; // this account is offline
 822     //if (tox_self_get_connection_status(ti.tox) == TOX_CONNECTION_NONE) return; // this account is offline
 823     // find friend
 824     uint frnum = tox_friend_by_public_key(ti.tox, dest.ptr);
 825     if (frnum == uint.max) { res = false; return; } // no such friend
 826     res = tox_friend_delete(ti.tox, frnum);
 827     if (res) ti.needSave = true;
 828     if (res) ti.ping();
 829   });
 830   return res;
 831 }
 832
 833
 834 /// checks if the given accound has a friend with the given pubkey.
 835 /// returns `false` if `self` is invalid or offline, or on any other error, or if there is no such friend.
 836 bool toxCoreHasFriend (in ref PubKey self, in ref PubKey dest) nothrow {
 837   bool res = false;
 838   doWithLockedTPByKey(self, delegate (ti) {
 839     if (ti.tox is null) return; // this account is offline
 840     // find friend
 841     uint frnum = tox_friend_by_public_key(ti.tox, dest.ptr);
 842     res = (frnum != uint.max);
 843   });
 844   return res;
 845 }
 846
 847
 848 /// calls delegate for each known friend.
 849 /// return `true` from delegate to stop.
 850 /// WARNING! all background operations are locked, so don't spend too much time in delegate!
 851 void toxCoreForEachFriend (in ref PubKey self, scope bool delegate (in ref PubKey self, in ref PubKey frpub, scope const(char)[] nick) dg) nothrow {
 852   if (dg is null) return;
 853   doWithLockedTPByKey(self, delegate (ti) {
 854     if (ti.tox is null) return; // this account is offline
 855     auto frcount = tox_self_get_friend_list_size(ti.tox);
 856     if (frcount == 0) return;
 857     auto list = new uint[](frcount);
 858     scope(exit) delete list;
 859     char[] nick;
 860     scope(exit) delete nick;
 861     tox_self_get_friend_list(ti.tox, list.ptr);
 862     PubKey fpk;
 863     foreach (immutable fidx, immutable fid; list[]) {
 864       if (!tox_friend_get_public_key(ti.tox, fid, fpk.ptr)) continue;
 865       auto nsz = tox_friend_get_name_size(ti.tox, fid);
 866       if (nsz > nick.length) nick.length = nsz;
 867       if (nsz != 0) tox_friend_get_name(ti.tox, fid, nick.ptr);
 868       try {
 869         dg(self, fpk, nick[0..nsz]);
 870       } catch (Exception e) {
 871         break;
 872       }
 873     }
 874   });
 875 }
 876
 877
 878 /// returns the time when this friend was seen online.
 879 /// returns `SysTime.min` if `self` is invalid, `dest` is invalid, or on any other error.
 880 SysTime toxCoreLastSeen (in ref PubKey self, in ref PubKey dest) nothrow {
 881   SysTime res = SysTime.min;
 882   doWithLockedTPByKey(self, delegate (ti) {
 883     if (ti.tox is null) return; // this account is offline
 884     // find friend
 885     uint frnum = tox_friend_by_public_key(ti.tox, dest.ptr);
 886     if (frnum == uint.max) return; // unknown friend
 887     TOX_ERR_FRIEND_GET_LAST_ONLINE err;
 888     auto ut = tox_friend_get_last_online(ti.tox, frnum, &err);
 889     try {
 890       if (err == 0) res = SysTime.fromUnixTime(ut);
 891     } catch (Exception e) {
 892       res = SysTime.min;
 893     }
 894   });
 895   return res;
 896 }
 897
 898
 899 /// calls delegate with ToxP. ugly name is intentional.
 900 void toxCoreCallWithToxP (in ref PubKey self, scope void delegate (ToxP tox) dg) nothrow {
 901   if (dg is null) return;
 902   doWithLockedTPByKey(self, delegate (ti) {
 903     if (ti.tox is null) return; // this account is offline
 904     try {
 905       dg(ti.tox);
 906     } catch (Exception e) {}
 907   });
 908 }
 909
 910
 911 // ////////////////////////////////////////////////////////////////////////// //
 912 // private ToxCore protocol implementation details
 913 private:
 914
 915 class TPInfo {
 916   static struct FileRejectEvent {
 917     uint frnum;
 918     uint flnum;
 919   }
 920
 921   //ToxProtocol pr;
 922   string toxDataDiskName;
 923   ToxP tox;
 924   Tid tid;
 925   PubKey self;
 926   ToxAddr addr; // will be used if `tox` is `null`
 927   string nick;
 928   FileRejectEvent[] rej;
 929   bool doBootstrap; // do bootstrapping
 930   bool needSave;
 931
 932   void ping () nothrow {
 933     if (tox is null) return;
 934     try { tid.send(TrdCmdPing.init); } catch (Exception e) {}
 935   }
 936 }
 937
 938 __gshared TPInfo[] allProtos;
 939
 940
 941 // ////////////////////////////////////////////////////////////////////////// //
 942 struct TrdCmdQuit {} // quit thread loop
 943 struct TrdCmdQuitAck {} // quit thread loop
 944 struct TrdCmdPing {} // do something
 945 struct TrdCmdKillToxCore {}
 946 struct TrdCmdSetToxCore { ToxP tox; }
 947
 948
 949 // ////////////////////////////////////////////////////////////////////////// //
 950 // this should be called with registered `ti`
 951 void startThread (TPInfo ti) {
 952   assert(ti !is null);
 953   ti.tid = spawn(&toxCoreThread, thisTid, *cast(immutable(void)**)&ti);
 954 }
 955
 956
 957 // ////////////////////////////////////////////////////////////////////////// //
 958 static void toxCoreThread (Tid ownerTid, immutable(void)* tiptr) {
 959   uint mswait = 0;
 960   MonoTime lastSaveTime = MonoTime.zero;
 961   TPInfo ti = *cast(TPInfo*)&tiptr; // HACK!
 962   ToxP newTox = null;
 963   try {
 964     for (;;) {
 965       bool doQuit = false;
 966       bool doKillTox = false;
 967
 968       if (ti.tox !is null && ti.doBootstrap) {
 969         conwriteln("TOX(", ti.nick, "): bootstrapping");
 970         ti.doBootstrap = false;
 971         bootstrap(ti);
 972         mswait = tox_iteration_interval(ti.tox);
 973         if (mswait < 1) mswait = 1;
 974         conwriteln("TOX(", ti.nick, "): bootstrapping complete (mswait=", mswait, ")");
 975       }
 976
 977       receiveTimeout((mswait ? mswait.msecs : 10.hours),
 978         (TrdCmdQuit cmd) { doQuit = true; },
 979         (TrdCmdPing cmd) {},
 980         (TrdCmdKillToxCore cmd) { doKillTox = true; },
 981         (shared TrdCmdSetToxCore cmd) { newTox = cast(ToxP)cmd.tox; },
 982         (Variant v) { conwriteln("WUTAFUCK?! "); },
 983       );
 984       if (doQuit) break;
 985
 986       if (newTox !is null) {
 987         conwriteln("TOX(", ti.nick, "): got new toxcore pointer");
 988         if (ti.tox !is newTox) {
 989           if (ti.tox !is null) tox_kill(ti.tox);
 990           ti.tox = newTox;
 991         }
 992         newTox = null;
 993         ti.doBootstrap = true;
 994         mswait = 1;
 995         continue;
 996       }
 997
 998       if (ti.tox is null) { mswait = 0; continue; }
 999
1000       if (doKillTox) {
1001         conwriteln("TOX(", ti.nick, "): killing toxcore pointer");
1002         doKillTox = false;
1003         if (ti.tox !is null) {
1004           tox_kill(ti.tox);
1005           ti.tox = null;
1006         } else {
1007           conwriteln("TOX(", ti.nick, "): wtf?!");
1008         }
1009         mswait = 0;
1010         continue;
1011       }
1012
1013       tox_iterate(ti.tox, null);
1014       mswait = tox_iteration_interval(ti.tox);
1015       //conwriteln("TOX(", ti.nick, "): interval is ", mswait);
1016       if (mswait < 1) mswait = 1;
1017       synchronized(ti) {
1018         if (ti.needSave) {
1019           auto ctt = MonoTime.currTime;
1020           if ((ctt-lastSaveTime).total!"minutes" > 1) {
1021             ti.needSave = false;
1022             lastSaveTime = ctt;
1023             saveToxCoreData(ti.tox, ti.toxDataDiskName);
1024           }
1025         }
1026       }
1027     }
1028     ownerTid.send(TrdCmdQuitAck.init);
1029   } catch (Throwable e) {
1030     // here, we are dead and fucked (the exact order doesn't matter)
1031     import core.stdc.stdlib : abort;
1032     import core.stdc.stdio : fprintf, stderr;
1033     import core.memory : GC;
1034     import core.thread : thread_suspendAll;
1035     GC.disable(); // yeah
1036     thread_suspendAll(); // stop right here, you criminal scum!
1037     auto s = e.toString();
1038     fprintf(stderr, "\n=== FATAL ===\n%.*s\n", cast(uint)s.length, s.ptr);
1039     abort(); // die, you bitch!
1040   }
1041 }
1042
1043
1044 // ////////////////////////////////////////////////////////////////////////// //
1045 // find TPInfo object for the given tox handle; used in callbacks
1046 TPInfo findTP (ToxP tox) nothrow {
1047   if (tox is null) return null;
1048   synchronized(TPInfo.classinfo) {
1049     foreach (TPInfo ti; allProtos) {
1050       if (ti.tox is tox) return ti;
1051     }
1052   }
1053   return null;
1054 }
1055
1056
1057 // returns `true` if found and executed without errors
1058 bool doWithLockedTPByKey (in ref PubKey self, scope void delegate (TPInfo ti) dg) nothrow {
1059   TPInfo tpi = null;
1060   if (dg is null) return false;
1061   synchronized(TPInfo.classinfo) {
1062     foreach (TPInfo ti; allProtos) if (ti.self[] == self[]) { tpi = ti; break; }
1063   }
1064   if (tpi !is null) {
1065     synchronized(tpi) {
1066       try {
1067         dg(tpi);
1068         return true;
1069       } catch (Exception e) {
1070         try {
1071           conprintfln("\nTOX CB EXCEPTION: %s\n\n", e.toString);
1072         } catch (Exception e) {}
1073         return false;
1074       }
1075     }
1076   }
1077   return false;
1078 }
1079
1080
1081 // returns `true` if found and executed without errors
1082 bool doWithLockedTP (ToxP tox, scope void delegate (TPInfo ti) dg) nothrow {
1083   TPInfo tpi = null;
1084   if (tox is null || dg is null) return false;
1085   synchronized(TPInfo.classinfo) {
1086     foreach (TPInfo ti; allProtos) if (ti.tox is tox) { tpi = ti; break; }
1087   }
1088   if (tpi !is null) {
1089     synchronized(tpi) {
1090       try {
1091         dg(tpi);
1092         return true;
1093       } catch (Exception e) {
1094         try {
1095           conprintfln("\nTOX CB EXCEPTION: %s\n\n", e.toString);
1096         } catch (Exception e) {}
1097         return false;
1098       }
1099     }
1100   }
1101   return false;
1102 }
1103
1104
1105 // ////////////////////////////////////////////////////////////////////////// //
1106 // toxcore callbacks
1107
1108 // self connection state was changed
1109 static extern(C) void connectionCB (Tox* tox, TOX_CONNECTION status, void* udata) nothrow {
1110   if (toxCoreSendEvent is null) return;
1111   ToxEventBase tcmsg;
1112   if (!tox.doWithLockedTP(delegate (TPInfo ti) {
1113     PubKey self; tox_self_get_public_key(tox, self.ptr);
1114     conwriteln("TOX(", ti.nick, "): ", (status != TOX_CONNECTION_NONE ? "" : "dis"), "connected.");
1115
1116     tcmsg = new ToxEventConnection(self, self, status != TOX_CONNECTION_NONE);
1117   })) return;
1118   toxCoreSendEvent(tcmsg);
1119 }
1120
1121
1122 // friend connection state was changed
1123 static extern(C) void friendConnectionCB (Tox* tox, uint frnum, TOX_CONNECTION status, void* udata) nothrow {
1124   if (toxCoreSendEvent is null) return;
1125   ToxEventBase tcmsg;
1126   if (!tox.doWithLockedTP(delegate (TPInfo ti) {
1127     PubKey self; tox_self_get_public_key(tox, self.ptr);
1128     PubKey who; if (!tox_friend_get_public_key(tox, frnum, who.ptr)) return; // wtf?!
1129     conwriteln("TOX(", ti.nick, "): friend #", frnum, " ", (status != TOX_CONNECTION_NONE ? "" : "dis"), "connected.");
1130
1131     tcmsg = new ToxEventConnection(self, who, status != TOX_CONNECTION_NONE);
1132     if (status != TOX_CONNECTION_NONE) ti.needSave = true;
1133   })) return;
1134   toxCoreSendEvent(tcmsg);
1135 }
1136
1137
1138 static extern(C) void friendStatusCB (Tox* tox, uint frnum, TOX_USER_STATUS status, void* udata) nothrow {
1139   if (toxCoreSendEvent is null) return;
1140   ToxEventBase tcmsg;
1141   if (!tox.doWithLockedTP(delegate (TPInfo ti) {
1142     PubKey self; tox_self_get_public_key(tox, self.ptr);
1143     PubKey who; if (!tox_friend_get_public_key(tox, frnum, who.ptr)) return; // wtf?!
1144     conwriteln("TOX(", ti.nick, "): friend #", frnum, " changed status to ", status);
1145
1146     ContactStatus cst = ContactStatus.Offline;
1147     switch (status) {
1148       case TOX_USER_STATUS_NONE: cst = ContactStatus.Online; break;
1149       case TOX_USER_STATUS_AWAY: cst = ContactStatus.Away; break;
1150       case TOX_USER_STATUS_BUSY: cst = ContactStatus.Busy; break;
1151       default: return;
1152     }
1153     tcmsg = new ToxEventStatus(self, who, cst);
1154   })) return;
1155   toxCoreSendEvent(tcmsg);
1156 }
1157
1158
1159 static extern(C) void friendNameCB (Tox* tox, uint frnum, const(char)* name, usize length, void* udata) nothrow {
1160   if (toxCoreSendEvent is null) return;
1161   ToxEventBase tcmsg;
1162   if (!tox.doWithLockedTP(delegate (TPInfo ti) {
1163     PubKey self; tox_self_get_public_key(tox, self.ptr);
1164     PubKey who; if (!tox_friend_get_public_key(tox, frnum, who.ptr)) return; // wtf?!
1165     conwriteln("TOX(", ti.nick, "): friend #", frnum, " changed name to <", name[0..length], ">");
1166
1167     tcmsg = new ToxEventNick(self, who, name[0..length].idup);
1168     ti.needSave = true;
1169   })) return;
1170   toxCoreSendEvent(tcmsg);
1171 }
1172
1173
1174 static extern(C) void friendStatusMessageCB (Tox* tox, uint frnum, const(char)* msg, usize msglen, void* user_data) nothrow {
1175   if (toxCoreSendEvent is null) return;
1176   ToxEventBase tcmsg;
1177   if (!tox.doWithLockedTP(delegate (TPInfo ti) {
1178     PubKey self; tox_self_get_public_key(tox, self.ptr);
1179     PubKey who; if (!tox_friend_get_public_key(tox, frnum, who.ptr)) return; // wtf?!
1180     conwriteln("TOX(", ti.nick, "): friend #", frnum, " changed status to <", msg[0..msglen], ">");
1181
1182     tcmsg = new ToxEventStatusMsg(self, who, msg[0..msglen].idup);
1183     ti.needSave = true;
1184   })) return;
1185   toxCoreSendEvent(tcmsg);
1186 }
1187
1188
1189 static extern(C) void friendReqCB (Tox* tox, const(ubyte)* pk, const(char)* msg, usize msglen, void* udata) nothrow {
1190   if (toxCoreSendEvent is null) return;
1191   ToxEventBase tcmsg;
1192   if (!tox.doWithLockedTP(delegate (TPInfo ti) {
1193     PubKey self; tox_self_get_public_key(tox, self.ptr);
1194     PubKey who; who[] = pk[0..PubKey.length];
1195     conwriteln("TOX(", ti.nick, "): friend request comes: <", msg[0..msglen], ">");
1196
1197     tcmsg = new ToxEventFriendReq(self, who, msg[0..msglen].idup);
1198     ti.needSave = true;
1199   })) return;
1200   toxCoreSendEvent(tcmsg);
1201 }
1202
1203
1204 static extern(C) void friendMsgCB (Tox* tox, uint frnum, TOX_MESSAGE_TYPE type, const(char)* msg, usize msglen, void* udata) nothrow {
1205   if (toxCoreSendEvent is null) return;
1206   ToxEventBase tcmsg;
1207   if (!tox.doWithLockedTP(delegate (TPInfo ti) {
1208     PubKey self; tox_self_get_public_key(tox, self.ptr);
1209     PubKey who; if (!tox_friend_get_public_key(tox, frnum, who.ptr)) return; // wtf?!
1210     conwriteln("TOX(", ti.nick, "): friend #", frnum, " sent a message.");
1211
1212     tcmsg = new ToxEventMessage(self, who, (type == TOX_MESSAGE_TYPE_ACTION), msg[0..msglen].idup);
1213   })) return;
1214   toxCoreSendEvent(tcmsg);
1215 }
1216
1217
1218 static extern(C) void friendReceiptCB (Tox* tox, uint frnum, uint msgid, void* udata) nothrow {
1219   if (toxCoreSendEvent is null) return;
1220   ToxEventBase tcmsg;
1221   if (!tox.doWithLockedTP(delegate (TPInfo ti) {
1222     PubKey self; tox_self_get_public_key(tox, self.ptr);
1223     PubKey who; if (!tox_friend_get_public_key(tox, frnum, who.ptr)) return; // wtf?!
1224     conwriteln("TOX(", ti.nick, "): friend #", frnum, " acked message #", msgid);
1225
1226     tcmsg = new ToxEventMessageAck(self, who, (cast(long)msgid)+1);
1227   })) return;
1228   toxCoreSendEvent(tcmsg);
1229 }
1230
1231
1232 static extern(C) void fileRecvCB (Tox* tox, uint frnum, uint flnum, TOX_FILE_KIND kind, ulong flsize, const(char)* name, usize namelen, void* udata) nothrow {
1233   if (toxCoreSendEvent is null) return;
1234   if (!tox.doWithLockedTP(delegate (TPInfo ti) {
1235     //PubKey self; tox_self_get_public_key(tox, self.ptr);
1236     //PubKey who; if (!tox_friend_get_public_key(tox, frnum, who.ptr)) return false; // wtf?!
1237
1238     bool found = false;
1239     foreach (ref TPInfo.FileRejectEvent fre; ti.rej) if (fre.frnum == frnum && fre.flnum == flnum) { found = true; break; }
1240     if (!found) ti.rej ~= TPInfo.FileRejectEvent(frnum, flnum);
1241   })) return;
1242
1243   /*
1244   if (kind == TOX_FILE_KIND_AVATAR) {
1245     if (flsize < 16 || flsize > 1024*1024) {
1246       timp.addRejectEvent(frnum, flnum);
1247       return;
1248     }
1249   }
1250   timp.addRejectEvent(frnum, flnum);
1251
1252   tox_file_control(tox, rej.frnum, rej.flnum, TOX_FILE_CONTROL_CANCEL, null);
1253   */
1254 }
1255
1256
1257 static extern(C) void fileRecvCtlCB (Tox* tox, uint frnum, uint flnum, TOX_FILE_CONTROL ctl, void* udata) nothrow {
1258   /+
1259   auto timp = findTP(tox);
1260   if (timp is null) return;
1261   PubKey who;
1262   if (!tox_friend_get_public_key(tox, frnum, who.ptr)) return false; // wtf?!
1263   try {
1264     conprintfln("got recv ctl for friend #%s, file #%s, ctl:%s", frnum, flnum, ctl);
1265     /*
1266     synchronized(timp) {
1267       timp.friendMessageAck(who, msgid);
1268     }
1269     */
1270   } catch (Exception e) {
1271     conprintfln("\nTOX[%s] CB EXCEPTION: %s\n\n", timp.srvalias, e.toString);
1272   }
1273
1274   auto timp = *cast(Account*)&udata;
1275   if (timp is null || timp.tox is null) return;
1276   try {
1277     final switch (ctl) {
1278       case TOX_FILE_CONTROL_RESUME: /*timp.resumeSendByNums(frnum, flnum);*/ break;
1279       case TOX_FILE_CONTROL_PAUSE: /*timp.pauseSendByNums(frnum, flnum);*/ break;
1280       case TOX_FILE_CONTROL_CANCEL: /*timp.abortSendByNums(frnum, flnum);*/ break;
1281     }
1282   } catch (Exception e) {
1283     try {
1284       conprintfln("\nTOX[%s] CB EXCEPTION: %s\n\n", timp.srvalias, e.toString);
1285       timp.fatalError();
1286     } catch (Exception) {}
1287   }
1288   +/
1289 }
1290
1291
1292 static extern(C) void fileChunkReqCB (Tox* tox, uint frnum, uint flnum, ulong pos, usize len, void* udata) nothrow {
1293   if (toxCoreSendEvent is null) return;
1294   if (!tox.doWithLockedTP(delegate (TPInfo ti) {
1295     PubKey self; tox_self_get_public_key(tox, self.ptr);
1296     PubKey who; if (!tox_friend_get_public_key(tox, frnum, who.ptr)) return; // wtf?!
1297
1298     bool found = false;
1299     foreach (ref TPInfo.FileRejectEvent fre; ti.rej) if (fre.frnum == frnum && fre.flnum == flnum) { found = true; break; }
1300     if (!found) ti.rej ~= TPInfo.FileRejectEvent(frnum, flnum);
1301   })) return;
1302
1303   //logwritefln("got chunk req recv ctl for friend #%s, file #%s, ctl:%s", frnum, flnum, ctl);
1304   /*
1305   try {
1306     timp.fschunks ~= ChunkToSend(frnum, flnum, pos, len);
1307   } catch (Exception e) {
1308     try {
1309       conprintfln("\nTOX[%s] CB EXCEPTION: %s\n\n", timp.srvalias, e.toString);
1310       timp.dropNetIOConnection();
1311     } catch (Exception) {}
1312   }
1313   */
1314 }
1315
1316
1317 // ////////////////////////////////////////////////////////////////////////// //
1318 void bootstrap(string mode="any") (TPInfo ti) nothrow if (mode == "udp" || mode == "tcp" || mode == "any") {
1319   if (ti is null || ti.tox is null) return;
1320
1321   ToxBootstrapServer[] loadBootNodes () nothrow {
1322     import std.path;
1323     auto bfname = buildPath(ti.toxDataDiskName.dirName, "tox_bootstrap.rc");
1324     ToxBootstrapServer[] bootnodes = null;
1325     try {
1326       bootnodes.txtunser(VFile(bfname));
1327       if (bootnodes.length > 0) return bootnodes;
1328     } catch (Exception e) {}
1329     // try to download
1330     try {
1331       bootnodes = tox_download_bootstrap_list();
1332       if (bootnodes.length > 0) {
1333         try {
1334           bootnodes.txtser(VFile(bfname, "w"));
1335         } catch (Exception e) {}
1336       }
1337       return bootnodes;
1338     } catch (Exception e) {}
1339     return null;
1340   }
1341
1342   conprintfln("Tox: loading bootstrap nodes...");
1343   auto nodes = loadBootNodes();
1344   conprintfln("Tox: %s nodes loaded", nodes.length);
1345   if (nodes.length == 0) return;
1346   foreach (const ref ToxBootstrapServer srv; nodes) {
1347     if (srv.ipv4.length < 2) continue;
1348     assert(srv.ipv4[$-1] == 0);
1349     //conprintfln("  node ip: %s:%u (maintainer: %s)", srv.ipv4[0..$-1], srv.port, srv.maintainer);
1350     static if (mode == "udp") {
1351       if (srv.udp) {
1352         tox_bootstrap(ti.tox, srv.ipv4.ptr, srv.port, srv.pubkey.ptr, null);
1353       }
1354     } else static if (mode == "tcp") {
1355       if (srv.tcp) {
1356         foreach (immutable ushort port; srv.tcpports) {
1357           tox_add_tcp_relay(ti.tox, srv.ipv4.ptr, port, srv.pubkey.ptr, null);
1358         }
1359       }
1360     } else {
1361       if (srv.udp) {
1362         tox_bootstrap(ti.tox, srv.ipv4.ptr, srv.port, srv.pubkey.ptr, null);
1363       } else if (srv.udp) {
1364         foreach (immutable ushort port; srv.tcpports) {
1365           tox_add_tcp_relay(ti.tox, srv.ipv4.ptr, port, srv.pubkey.ptr, null);
1366         }
1367       }
1368     }
1369     tox_iterate(ti.tox, null);
1370   }
1371   //conprintfln("Tox[%s]: %s nodes added", srvalias, nodes.length);
1372 }
1373
1374
1375 // ////////////////////////////////////////////////////////////////////////// //
1376 // returns `null` if there is no such file or file cannot be loaded
1377 ubyte[] loadToxCoreData (const(char)[] toxdatafname) nothrow {
1378   import core.stdc.stdio : FILE, fopen, fclose, rename, fread, ferror, fseek, ftell, SEEK_SET, SEEK_END;
1379   import core.stdc.stdlib : malloc, free;
1380   import core.sys.posix.unistd : unlink;
1381
1382   if (toxdatafname.length == 0) return null;
1383
1384   static char* namebuf = null;
1385   static uint nbsize = 0;
1386
1387   if (nbsize < toxdatafname.length+1024) {
1388     import core.stdc.stdlib : realloc;
1389     nbsize = cast(uint)toxdatafname.length+1024;
1390     namebuf = cast(char*)realloc(namebuf, nbsize);
1391     if (namebuf is null) assert(0, "out of memory");
1392   }
1393
1394   auto origName = expandTilde(namebuf[0..nbsize-6], toxdatafname);
1395   if (origName == null) return null; // oops
1396   origName.ptr[origName.length] = 0; // zero-terminate
1397
1398   FILE* fi = fopen(namebuf, "r");
1399   if (fi is null) return null;
1400   scope(exit) fclose(fi);
1401
1402   for (;;) {
1403     if (fseek(fi, 0, SEEK_END) == -1) {
1404       import core.stdc.errno;
1405       if (errno == EINTR) continue;
1406       return null;
1407     }
1408     break;
1409   }
1410
1411   long fsize;
1412   for (;;) {
1413     fsize = ftell(fi);
1414     if (fsize == -1) {
1415       import core.stdc.errno;
1416       if (errno == EINTR) continue;
1417       return null;
1418     }
1419     break;
1420   }
1421
1422   if (fsize > 1024*1024*256) { conwriteln("toxcore data file too big"); return null; }
1423   if (fsize == 0) return null; // it cannot be zero-sized
1424
1425   for (;;) {
1426     if (fseek(fi, 0, SEEK_SET) == -1) {
1427       import core.stdc.errno;
1428       if (errno == EINTR) continue;
1429       return null;
1430     }
1431     break;
1432   }
1433
1434   auto res = new ubyte[](cast(int)fsize);
1435   conwriteln("loading toxcore data; size=", fsize);
1436
1437   auto left = res;
1438   while (left.length > 0) {
1439     auto rd = fread(left.ptr, 1, left.length, fi);
1440     if (rd == 0) { delete res; return null; } // error
1441     if (rd < cast(int)left.length) {
1442       if (!ferror(fi)) { delete res; return null; } // error
1443       import core.stdc.errno;
1444       if (errno != EINTR) { delete res; return null; } // error
1445       if (rd > 0) left = left[rd..$];
1446       continue;
1447     }
1448     if (rd > left.length) { delete res; return null; } // error
1449     left = left[rd..$];
1450   }
1451
1452   if (left.length) { delete res; return null; } // error
1453
1454   return res;
1455 }
1456
1457
1458 bool saveToxCoreData (ToxP tox, const(char)[] toxdatafname) nothrow {
1459   import core.stdc.stdio : FILE, fopen, fclose, rename, fwrite;
1460   import core.stdc.stdlib : malloc, free;
1461   import core.sys.posix.unistd : unlink;
1462   //import std.internal.cstring;
1463
1464   if (tox is null || toxdatafname.length == 0) return false;
1465
1466   auto size = tox_get_savedata_size(tox);
1467   if (size > int.max/8) return false; //throw new Exception("save data too big");
1468
1469   char* savedata = cast(char*)malloc(size);
1470   if (savedata is null) return false;
1471   scope(exit) if (savedata !is null) free(savedata);
1472
1473   tox_get_savedata(tox, savedata);
1474   conwriteln("save toxcore data; size=", size);
1475
1476   static char* namebuf = null;
1477   static char* namebuf1 = null;
1478   static uint nbsize = 0;
1479
1480   if (nbsize < toxdatafname.length+1024) {
1481     import core.stdc.stdlib : realloc;
1482     nbsize = cast(uint)toxdatafname.length+1024;
1483     namebuf = cast(char*)realloc(namebuf, nbsize);
1484     if (namebuf is null) assert(0, "out of memory");
1485     namebuf1 = cast(char*)realloc(namebuf1, nbsize);
1486     if (namebuf1 is null) assert(0, "out of memory");
1487   }
1488
1489   auto origName = expandTilde(namebuf[0..nbsize-6], toxdatafname);
1490   if (origName == null) return false; // oops
1491   origName.ptr[origName.length] = 0; // zero-terminate
1492
1493   // create temporary name
1494   namebuf1[0..origName.length] = origName[];
1495   namebuf1[origName.length..origName.length+5] = ".$$$\x00";
1496
1497   FILE* fo = fopen(namebuf1, "w");
1498   if (fo is null) return false;
1499
1500   auto left = savedata[0..size];
1501   while (left.length > 0) {
1502     auto wr = fwrite(left.ptr, 1, left.length, fo);
1503     if (wr < cast(int)left.length) {
1504       import core.stdc.errno;
1505       if (errno == EINTR) {
1506         if (wr > 0) left = left[wr..$];
1507         continue;
1508       }
1509       break;
1510     }
1511     if (wr > left.length) break; // wtf?!
1512     left = left[wr..$];
1513   }
1514
1515   // error?
1516   if (left.length) {
1517     fclose(fo);
1518     unlink(namebuf1);
1519     return false;
1520   }
1521   syncFile(fo);
1522   fclose(fo);
1523
1524   if (rename(namebuf1, namebuf) != 0) {
1525     unlink(namebuf1);
1526     return false;
1527   }
1528
1529   return true;
1530 }
1531
1532
1533 version(ToxCoreDebug) {
1534 static extern(C) void toxCoreLogCB (Tox* tox, TOX_LOG_LEVEL level, const(char)* file, uint line, const(char)* func, const(char)* message, void* user_data) nothrow {
1535   static inout(char)[] sz (inout(char)* s) nothrow @trusted @nogc {
1536     if (s is null) return null;
1537     uint idx = 0;
1538     while (s[idx]) ++idx;
1539     return cast(inout(char)[])(s[0..idx]);
1540   }
1541
1542   conwriteln("level=", level, "; file=", sz(file), ":", line, "; func=", sz(func), "; msg=", sz(message));
1543 }
1544 }
1545
1546
1547 // ////////////////////////////////////////////////////////////////////////// //
1548 // returns `false` if can't open/create
1549 ToxP toxCreateInstance (const(char)[] toxdatafname, in ref ProtoOptions protoOpts, bool allowNew, bool* wasCreated=null) nothrow {
1550   if (wasCreated !is null) *wasCreated = false;
1551
1552   if (toxdatafname.length == 0) return null;
1553
1554   // create toxcore
1555   char* toxProxyHost = null;
1556   scope(exit) {
1557     import core.stdc.stdlib : free;
1558     if (toxProxyHost !is null) free(toxProxyHost);
1559   }
1560   ubyte[] savedata;
1561   scope(exit) delete savedata;
1562
1563   auto toxOpts = tox_options_new();
1564   assert(toxOpts !is null);
1565   scope(exit) if (toxOpts !is null) tox_options_free(toxOpts);
1566   tox_options_default(toxOpts);
1567
1568   bool createNewToxCoreAccount = false;
1569   toxOpts.tox_options_set_ipv6_enabled(protoOpts.ipv6);
1570   toxOpts.tox_options_set_udp_enabled(protoOpts.udp);
1571   toxOpts.tox_options_set_local_discovery_enabled(protoOpts.localDiscovery);
1572   toxOpts.tox_options_set_hole_punching_enabled(protoOpts.holePunching);
1573   toxOpts.tox_options_set_start_port(protoOpts.startPort);
1574   toxOpts.tox_options_set_end_port(protoOpts.endPort);
1575   toxOpts.tox_options_set_tcp_port(protoOpts.tcpPort);
1576
1577   toxOpts.tox_options_set_proxy_type(protoOpts.proxyType);
1578   if (protoOpts.proxyType != TOX_PROXY_TYPE_NONE) {
1579     import core.stdc.stdlib : malloc;
1580     toxOpts.tox_options_set_proxy_port(protoOpts.proxyPort);
1581     // create proxy address string
1582     toxProxyHost = cast(char*)malloc(protoOpts.proxyAddr.length+1);
1583     if (toxProxyHost is null) assert(0, "out of memory");
1584     toxProxyHost[0..protoOpts.proxyAddr.length] = protoOpts.proxyAddr[];
1585     toxProxyHost[protoOpts.proxyAddr.length] = 0;
1586     toxOpts.tox_options_set_proxy_host(toxProxyHost);
1587   }
1588
1589   savedata = loadToxCoreData(toxdatafname);
1590   if (savedata is null) {
1591     // create new tox instance
1592     if (wasCreated !is null) *wasCreated = true;
1593     if (!allowNew) return null;
1594     toxOpts.tox_options_set_savedata_type(TOX_SAVEDATA_TYPE_NONE);
1595     conwriteln("creating new ToxCore account...");
1596   } else {
1597     // load data
1598     conwriteln("setting ToxCore account data (", savedata.length, " bytes)");
1599     toxOpts.tox_options_set_savedata_type(TOX_SAVEDATA_TYPE_TOX_SAVE);
1600     toxOpts.tox_options_set_savedata_length(savedata.length);
1601     toxOpts.tox_options_set_savedata_data(savedata.ptr, savedata.length);
1602   }
1603   scope(exit) delete savedata;
1604
1605   version(ToxCoreDebug) {
1606     toxOpts.tox_options_set_log_callback(&toxCoreLogCB);
1607   }
1608
1609   // create tox instance
1610   TOX_ERR_NEW error;
1611   ToxP tox = tox_new(toxOpts, &error);
1612   if (tox is null) {
1613     conwriteln("cannot create ToxCore instance: error is ", error);
1614     return null;
1615   }
1616
1617   /+
1618   if (createNewToxCoreAccount) {
1619     // set user name
1620     if (info.nick.length > 0) {
1621       auto nc = info.nick;
1622       if (nc.length > TOX_MAX_NAME_LENGTH) nc = nc[0..TOX_MAX_NAME_LENGTH];
1623       tox_self_set_name(tox, nc.ptr, nc.length);
1624     }
1625     saveToxCoreData();
1626   } else {
1627     // get user name
1628     auto nsz = tox_self_get_name_size(tox);
1629     if (nsz != 0) {
1630       if (nsz > TOX_MAX_NAME_LENGTH) nsz = TOX_MAX_NAME_LENGTH;
1631       char[TOX_MAX_NAME_LENGTH] xbuf = 0;
1632       tox_self_get_name(tox, xbuf.ptr);
1633       /*
1634       foreach (immutable idx, char ch; xbuf[]) {
1635         if (ch == 0) { info.nick = xbuf[0..idx].idup; break; }
1636       }
1637       */
1638       info.nick = xbuf[0..nsz].idup;
1639     }
1640   }
1641   +/
1642
1643   tox_callback_self_connection_status(tox, &connectionCB);
1644
1645   tox_callback_friend_name(tox, &friendNameCB);
1646   tox_callback_friend_status_message(tox, &friendStatusMessageCB);
1647   tox_callback_friend_status(tox, &friendStatusCB);
1648   tox_callback_friend_connection_status(tox, &friendConnectionCB);
1649   //tox_callback_friend_typing(tox, &friendTypingCB);
1650   tox_callback_friend_read_receipt(tox, &friendReceiptCB);
1651   tox_callback_friend_request(tox, &friendReqCB);
1652   tox_callback_friend_message(tox, &friendMsgCB);
1653
1654   tox_callback_file_recv_control(tox, &fileRecvCtlCB);
1655   tox_callback_file_chunk_request(tox, &fileChunkReqCB);
1656   tox_callback_file_recv(tox, &fileRecvCB);
1657   //tox_callback_file_recv_chunk
1658
1659   //tox_callback_conference_invite
1660   //tox_callback_conference_message
1661   //tox_callback_conference_title
1662   //tox_callback_conference_namelist_change
1663
1664   //tox_callback_friend_lossy_packet
1665   //tox_callback_friend_lossless_packet
1666
1667   return tox;
1668 }
1669
1670
1671 // ////////////////////////////////////////////////////////////////////////// //
1672 // ////////////////////////////////////////////////////////////////////////// //
1673 private:
1674 enum ToxCoreDataId = 0x15ed1b1fU;
1675
1676 enum ToxCoreChunkTypeHi = 0x01ceU;
1677 enum ToxCoreChunkNoSpamKeys = 1;
1678 enum ToxCoreChunkDHT = 2;
1679 enum ToxCoreChunkFriends = 3;
1680 enum ToxCoreChunkName = 4;
1681 enum ToxCoreChunkStatusMsg = 5;
1682 enum ToxCoreChunkStatus = 6;
1683 enum ToxCoreChunkTcpRelay = 10;
1684 enum ToxCoreChunkPathNode = 11;
1685 enum ToxCoreChunkEnd = 255;
1686
1687
1688 struct ToxSavedFriend {
1689   enum TOTAL_DATA_SIZE = 2216;
1690   enum CRYPTO_PUBLIC_KEY_SIZE = 32;
1691   enum CRYPTO_SECRET_KEY_SIZE = 32;
1692   enum SAVED_FRIEND_REQUEST_SIZE = 1024;
1693   enum MAX_NAME_LENGTH = 128;
1694   enum MAX_STATUSMESSAGE_LENGTH = 1007;
1695
1696   enum Status : ubyte {
1697     NoFriend,
1698     Added,
1699     Requested,
1700     Confirmed,
1701     Online,
1702   }
1703
1704   enum UserStatus : ubyte {
1705     None,
1706     Away,
1707     Busy,
1708     Invalid,
1709   }
1710
1711   Status status;
1712   ubyte[CRYPTO_PUBLIC_KEY_SIZE] real_pk;
1713   char[SAVED_FRIEND_REQUEST_SIZE] info; // the data that is sent during the friend requests we do
1714   //ubyte pad0;
1715   ushort info_size; // length of the info
1716   char[MAX_NAME_LENGTH] name;
1717   ushort name_length;
1718   char[MAX_STATUSMESSAGE_LENGTH] statusmessage;
1719   //ubyte pad1;
1720   ushort statusmessage_length;
1721   UserStatus userstatus;
1722   //ubyte[3] pad2;
1723   uint friendrequest_nospam;
1724   ulong last_seen_time;
1725
1726   void load (VFile fl) {
1727     // we can use CTFE here, but meh...
1728     status = cast(Status)fl.readNum!ubyte;
1729     if (status > Status.max) throw new ProtocolException("invalid friend status");
1730     fl.rawReadExact(real_pk[]);
1731     fl.rawReadExact(info[]);
1732     /*pad0 =*/ fl.readNum!ubyte;
1733     info_size = fl.readNum!(ushort, "BE");
1734     if (info_size > info.length) throw new ProtocolException("invalid friend data");
1735     fl.rawReadExact(name[]);
1736     name_length = fl.readNum!(ushort, "BE");
1737     if (name_length > name.length) throw new ProtocolException("invalid friend data");
1738     fl.rawReadExact(statusmessage[]);
1739     /*pad1 =*/ fl.readNum!ubyte;
1740     statusmessage_length = fl.readNum!(ushort, "BE");
1741     if (statusmessage_length > statusmessage.length) throw new ProtocolException("invalid friend data");
1742     userstatus = cast(UserStatus)fl.readNum!ubyte;
1743     if (userstatus > UserStatus.max) throw new ProtocolException("invalid friend userstatus");
1744     /*pad30 =*/ fl.readNum!ubyte;
1745     /*pad31 =*/ fl.readNum!ubyte;
1746     /*pad32 =*/ fl.readNum!ubyte;
1747     friendrequest_nospam = fl.readNum!uint;
1748     last_seen_time = fl.readNum!(ulong, "BE");
1749   }
1750 }