win/inspircd_win32wrapper.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd_win32wrapper.h"
  15 #include "inspircd.h"
  16 #include "configreader.h"
  17 #include <string>
  18 #include <errno.h>
  19 #include <assert.h>
  20 using namespace std;
  21
  22 #ifndef INADDR_NONE
  23 #define INADDR_NONE 0xffffffff
  24 #endif
  25
  26 /* This MUST remain static and delcared outside the class, so that WriteProcessMemory can reference it properly */
  27 static DWORD owner_processid = 0;
  28
  29
  30 int inet_aton(const char *cp, struct in_addr *addr)
  31 {
  32         unsigned long ip = inet_addr(cp);
  33         addr->s_addr = ip;
  34         return (addr->s_addr == INADDR_NONE) ? 0 : 1;
  35 }
  36
  37 const char *inet_ntop(int af, const void *src, char *dst, socklen_t cnt)
  38 {
  39
  40         if (af == AF_INET)
  41         {
  42                 struct sockaddr_in in;
  43                 memset(&in, 0, sizeof(in));
  44                 in.sin_family = AF_INET;
  45                 memcpy(&in.sin_addr, src, sizeof(struct in_addr));
  46                 getnameinfo((struct sockaddr *)&in, sizeof(struct sockaddr_in), dst, cnt, NULL, 0, NI_NUMERICHOST);
  47                 return dst;
  48         }
  49         else if (af == AF_INET6)
  50         {
  51                 struct sockaddr_in6 in;
  52                 memset(&in, 0, sizeof(in));
  53                 in.sin6_family = AF_INET6;
  54                 memcpy(&in.sin6_addr, src, sizeof(struct in_addr6));
  55                 getnameinfo((struct sockaddr *)&in, sizeof(struct sockaddr_in6), dst, cnt, NULL, 0, NI_NUMERICHOST);
  56                 return dst;
  57         }
  58         return NULL;
  59 }
  60
  61 int geteuid()
  62 {
  63         return 1;
  64 }
  65
  66 int inet_pton(int af, const char *src, void *dst)
  67 {
  68         sockaddr_in sa;
  69         int len = sizeof(SOCKADDR);
  70         int rv = WSAStringToAddress((LPSTR)src, af, NULL, (LPSOCKADDR)&sa, &len);
  71         if(rv >= 0)
  72         {
  73                 if(WSAGetLastError() == 10022)                  // Invalid Argument
  74                         rv = 0;
  75                 else
  76                         rv = 1;
  77         }
  78         memcpy(dst, &sa.sin_addr, sizeof(struct in_addr));
  79         return rv;
  80 }
  81
  82 char * strtok_r(char *_String, const char *_Control, char **_Context)
  83 {
  84         unsigned char *str;
  85         const unsigned char *ctl = (const unsigned char*)_Control;
  86         unsigned char map[32];
  87
  88         if (_Context == 0 || !_Control)
  89                 return 0;
  90
  91         if (!(_String != NULL || *_Context != NULL))
  92                 return 0;
  93
  94         memset(map, 0, 32);
  95
  96         do {
  97                 map[*ctl >> 3] |= (1 << (*ctl & 7));
  98         } while (*ctl++);
  99
 100         /* If string is NULL, set str to the saved
 101         * pointer (i.e., continue breaking tokens out of the string
 102         * from the last strtok call) */
 103         if (_String != NULL)
 104         {
 105                 str = (unsigned char*)_String;
 106         }
 107         else
 108         {
 109                 str = (unsigned char*)*_Context;
 110         }
 111
 112         /* Find beginning of token (skip over leading delimiters). Note that
 113         * there is no token iff this loop sets str to point to the terminal
 114         * null (*str == 0) */
 115         while ((map[*str >> 3] & (1 << (*str & 7))) && *str != 0)
 116         {
 117                 str++;
 118         }
 119
 120         _String = (char*)str;
 121
 122         /* Find the end of the token. If it is not the end of the string,
 123         * put a null there. */
 124         for ( ; *str != 0 ; str++ )
 125         {
 126                 if (map[*str >> 3] & (1 << (*str & 7)))
 127                 {
 128                         *str++ = 0;
 129                         break;
 130                 }
 131         }
 132
 133         /* Update context */
 134         *_Context = (char*)str;
 135
 136         /* Determine if a token has been found. */
 137         if (_String == (char*)str)
 138         {
 139                 return NULL;
 140         }
 141         else
 142         {
 143                 return _String;
 144         }
 145 }
 146
 147 void setcolor(int color_code)
 148 {
 149         SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), color_code);
 150 }
 151
 152 DIR * opendir(const char * path)
 153 {
 154         std::string search_path = string(path) + "\\*.*";
 155         WIN32_FIND_DATA fd;
 156         HANDLE f = FindFirstFile(search_path.c_str(), &fd);
 157         if (f != INVALID_HANDLE_VALUE)
 158         {
 159                 DIR * d = new DIR;
 160                 memcpy(&d->find_data, &fd, sizeof(WIN32_FIND_DATA));
 161                 d->find_handle = f;
 162                 d->first = true;
 163                 return d;
 164         }
 165         else
 166         {
 167                 return 0;
 168         }
 169 }
 170
 171 dirent * readdir(DIR * handle)
 172 {
 173         if (handle->first)
 174                 handle->first = false;
 175         else
 176         {
 177                 if (!FindNextFile(handle->find_handle, &handle->find_data))
 178                         return 0;
 179         }
 180
 181         strncpy(handle->dirent_pointer.d_name, handle->find_data.cFileName, MAX_PATH);
 182         return &handle->dirent_pointer;
 183 }
 184
 185 void closedir(DIR * handle)
 186 {
 187         FindClose(handle->find_handle);
 188         delete handle;
 189 }
 190
 191 const char * dlerror()
 192 {
 193         static char errormessage[500];
 194         DWORD error = GetLastError();
 195         SetLastError(0);
 196         if (error == 0)
 197                 return 0;
 198
 199         FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, 0, error, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)errormessage, 500, 0);
 200         return errormessage;
 201 }
 202
 203 #define TRED FOREGROUND_RED | FOREGROUND_INTENSITY
 204 #define TGREEN FOREGROUND_GREEN | FOREGROUND_INTENSITY
 205 #define TYELLOW FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_INTENSITY
 206 #define TNORMAL FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_BLUE
 207 #define TWHITE TNORMAL | FOREGROUND_INTENSITY
 208 #define TBLUE FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_INTENSITY
 209
 210 /* Handles colors in printf */
 211 int printf_c(const char * format, ...)
 212 {
 213         // Better hope we're not multithreaded, otherwise we'll have chickens crossing the road other side to get the to :P
 214         static char message[MAXBUF];
 215         static char temp[MAXBUF];
 216         int color1, color2;
 217
 218         /* parse arguments */
 219         va_list ap;
 220         va_start(ap, format);
 221         vsnprintf(message, 500, format, ap);
 222         va_end(ap);
 223
 224         /* search for unix-style escape sequences */
 225         int t;
 226         int c = 0;
 227         const char * p = message;
 228         while (*p != 0)
 229         {
 230                 if (*p == '\033')
 231                 {
 232                         // Escape sequence -> copy into the temp buffer, and parse the color.
 233                         p++;
 234                         t = 0;
 235                         while ((*p) && (*p != 'm'))
 236                         {
 237                                 temp[t++] = *p;
 238                                 ++p;
 239                         }
 240
 241                         temp[t] = 0;
 242                         p++;
 243
 244                         if (*temp == '[')
 245                         {
 246                                 if (sscanf(temp, "[%u;%u", &color1, &color2) == 2)
 247                                 {
 248                                         switch(color2)
 249                                         {
 250                                         case 32:                // Green
 251                                                 SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_GREEN | FOREGROUND_INTENSITY);              // Yellow
 252                                                 break;
 253
 254                                         default:                // Unknown
 255                                                 // White
 256                                                 SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY);
 257                                                 break;
 258                                         }
 259                                 }
 260                                 else
 261                                 {
 262                                         switch (*(temp+1))
 263                                         {
 264                                                 case '0':
 265                                                         // Returning to normal colour.
 266                                                         SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE);
 267                                                         break;
 268
 269                                                 case '1':
 270                                                         // White
 271                                                         SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), TWHITE);
 272                                                         break;
 273
 274                                                 default:
 275                                                         char message[50];
 276                                                         sprintf(message, "Unknown color code: %s", temp);
 277                                                         MessageBox(0, message, message, MB_OK);
 278                                                         break;
 279                                         }
 280                                 }
 281                         }
 282                 }
 283
 284                 putchar(*p);
 285                 ++c;
 286                 ++p;
 287         }
 288
 289         return c;
 290 }
 291
 292 int arg_counter = 1;
 293 char optarg[514];
 294 int getopt_long_only(int ___argc, char *const *___argv, const char *__shortopts, const struct option *__longopts, int *__longind)
 295 {
 296         // burlex todo: handle the shortops, at the moment it only works with longopts.
 297
 298         if (___argc == 1 || arg_counter == ___argc)                     // No arguments (apart from filename)
 299                 return -1;
 300
 301         const char * opt = ___argv[arg_counter];
 302         int return_val = 0;
 303
 304         // if we're not an option, return an error.
 305         if (strnicmp(opt, "--", 2) != 0)
 306                 return 1;
 307         else
 308                 opt += 2;
 309
 310
 311         // parse argument list
 312         int i = 0;
 313         for (; __longopts[i].name != 0; ++i)
 314         {
 315                 if (!strnicmp(__longopts[i].name, opt, strlen(__longopts[i].name)))
 316                 {
 317                         // woot, found a valid argument =)
 318                         char * par = 0;
 319                         if ((arg_counter + 1) != ___argc)
 320                         {
 321                                 // grab the parameter from the next argument (if its not another argument)
 322                                 if (strnicmp(___argv[arg_counter+1], "--", 2) != 0)
 323                                 {
 324                                         arg_counter++;          // Trash this next argument, we won't be needing it.
 325                                         par = ___argv[arg_counter];
 326                                 }
 327                         }
 328
 329                         // increment the argument for next time
 330                         arg_counter++;
 331
 332                         // determine action based on type
 333                         if (__longopts[i].has_arg == required_argument && !par)
 334                         {
 335                                 // parameter missing and its a required parameter option
 336                                 return 1;
 337                         }
 338
 339                         // store argument in optarg
 340                         if (par)
 341                                 strncpy(optarg, par, 514);
 342
 343                         if (__longopts[i].flag != 0)
 344                         {
 345                                 // this is a variable, we have to set it if this argument is found.
 346                                 *__longopts[i].flag = 1;
 347                                 return 0;
 348                         }
 349                         else
 350                         {
 351                                 if (__longopts[i].val == -1 || par == 0)
 352                                         return 1;
 353
 354                                 return __longopts[i].val;
 355                         }
 356                         break;
 357                 }
 358         }
 359
 360         // return 1 (invalid argument)
 361         return 1;
 362 }
 363
 364 /* IPC Messages */
 365 #define IPC_MESSAGE_REHASH      1
 366 #define IPC_MESSAGE_DIE         2
 367 #define IPC_MESSAGE_RESTART     3
 368
 369 void IPC::IPC(InspIRCd* Srv) : Instance(Srv)
 370 {
 371         static DWORD buflen = 1024;
 372         static const char * pipename = "\\\\.\\mailslot\\Inspircd";
 373         hIPCPipe = CreateMailslot(pipename, buflen, 0, 0);
 374         if (hIPCPipe == INVALID_HANDLE_VALUE)
 375                 printf("IPC Pipe could not be created. Are you sure you didn't start InspIRCd twice?\n");
 376 }
 377
 378 void IPC::Check()
 379 {
 380         if (hIPCPipe == INVALID_HANDLE_VALUE)
 381                 return;
 382
 383         DWORD bytes;
 384         DWORD action;
 385
 386         BOOL res = ReadFile(hIPCPipe, &action, sizeof(DWORD), &bytes, 0);
 387         if (!res)
 388         {
 389                 if (GetLastError() != ERROR_SEM_TIMEOUT)
 390                         Instance->Log(DEFAULT, "IPC Pipe Error %u: %s", GetLastError(), dlerror());
 391                 return;
 392         }
 393
 394         switch (action)
 395         {
 396                 case IPC_MESSAGE_REHASH:
 397                         Instance->Rehash(0);
 398                 break;
 399
 400                 case IPC_MESSAGE_DIE:
 401                         Instance->Exit(0);
 402                 break;
 403
 404                 case IPC_MESSAGE_RESTART:
 405                         Instance->Restart("IPC_MESSAGE_RESTART received by mailslot.");
 406                 break;
 407         }
 408 }
 409
 410 void IPC::~IPC()
 411 {
 412         CloseHandle(hIPCPipe);
 413 }
 414
 415
 416 /* These three functions were created from looking at how ares does it
 417  * (...and they look far tidier in C++)
 418  */
 419
 420 /* Get active nameserver */
 421 bool GetNameServer(HKEY regkey, const char *key, char* &output)
 422 {
 423         DWORD size = 0;
 424         DWORD result = RegQueryValueEx(regkey, key, 0, NULL, NULL, &size);
 425         if (((result != ERROR_SUCCESS) && (result != ERROR_MORE_DATA)) || (!size))
 426                 return false;
 427
 428         output = new char[size+1];
 429
 430         if ((RegQueryValueEx(regkey, key, 0, NULL, (LPBYTE)output, &size) != ERROR_SUCCESS) || (!*output))
 431         {
 432                 delete output;
 433                 return false;
 434         }
 435         return true;
 436 }
 437
 438 /* Check a network interface for its nameserver */
 439 bool GetInterface(HKEY regkey, const char *key, char* &output)
 440 {
 441         char buf[39];
 442         DWORD size = 39;
 443         int idx = 0;
 444         HKEY top;
 445
 446         while (RegEnumKeyEx(regkey, idx++, buf, &size, 0, NULL, NULL, NULL) != ERROR_NO_MORE_ITEMS)
 447         {
 448                 size = 39;
 449                 if (RegOpenKeyEx(regkey, buf, 0, KEY_QUERY_VALUE, &top) != ERROR_SUCCESS)
 450                         continue;
 451                 int rc = GetNameServer(top, key, output);
 452                 RegCloseKey(top);
 453                 if (rc)
 454                         return true;
 455         }
 456         return false;
 457 }
 458
 459
 460 std::string FindNameServerWin()
 461 {
 462         std::string returnval = "127.0.0.1";
 463         HKEY top, key;
 464         char* dns = NULL;
 465
 466         /* Lets see if the correct registry hive and tree exist */
 467         if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, "System\\CurrentControlSet\\Services\\Tcpip\\Parameters", 0, KEY_READ, &top) == ERROR_SUCCESS)
 468         {
 469                 /* If they do, attempt to get the nameserver name */
 470                 RegOpenKeyEx(top, "Interfaces", 0, KEY_QUERY_VALUE|KEY_ENUMERATE_SUB_KEYS, &key);
 471                 if ((GetNameServer(top, "NameServer", dns)) || (GetNameServer(top, "DhcpNameServer", dns))
 472                         || (GetInterface(key, "NameServer", dns)) || (GetInterface(key, "DhcpNameServer", dns)))
 473                 {
 474                         if (dns)
 475                         {
 476                                 returnval = dns;
 477                                 delete dns;
 478                         }
 479                 }
 480                 RegCloseKey(key);
 481                 RegCloseKey(top);
 482         }
 483         return returnval;
 484 }
 485
 486
 487 void ClearConsole()
 488 {
 489         COORD coordScreen = { 0, 0 };    /* here's where we'll home the cursor */
 490         HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
 491         DWORD cCharsWritten;
 492         CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */
 493         DWORD dwConSize;                 /* number of character cells in the current buffer */
 494
 495         /* get the number of character cells in the current buffer */
 496
 497         if (GetConsoleScreenBufferInfo( hConsole, &csbi ))
 498         {
 499                 dwConSize = csbi.dwSize.X * csbi.dwSize.Y;
 500                 /* fill the entire screen with blanks */
 501                 if (FillConsoleOutputCharacter( hConsole, (TCHAR) ' ', dwConSize, coordScreen, &cCharsWritten ))
 502                 {
 503                         /* get the current text attribute */
 504                         if (GetConsoleScreenBufferInfo( hConsole, &csbi ))
 505                         {
 506                                 /* now set the buffer's attributes accordingly */
 507                                 if (FillConsoleOutputAttribute( hConsole, csbi.wAttributes, dwConSize, coordScreen, &cCharsWritten ))
 508                                 {
 509                                         /* put the cursor at (0, 0) */
 510                                         SetConsoleCursorPosition( hConsole, coordScreen );
 511                                 }
 512                         }
 513                 }
 514         }
 515         return;
 516 }
 517
 518 /* Many inspircd classes contain function pointers/functors which can be changed to point at platform specific implementations
 519  * of code. This function, called from WindowsForkStart, repoints these pointers and functors so that calls are windows
 520  * specific.
 521  */
 522 void ChangeWindowsSpecificPointers(InspIRCd* Instance)
 523 {
 524         Instance->Config->DNSServerValidator = &ValidateWindowsDnsServer;
 525 }
 526
 527 DWORD WindowsForkStart(InspIRCd* Instance)
 528 {
 529         /* See the function declaration above */
 530         ChangeWindowsSpecificPointers(Instance);
 531
 532         /* Windows implementation of fork() :P */
 533         if (owner_processid)
 534                 return 0;
 535
 536         char module[MAX_PATH];
 537         if(!GetModuleFileName(NULL, module, MAX_PATH))
 538         {
 539                 printf("GetModuleFileName() failed.\n");
 540                 return false;
 541         }
 542
 543         STARTUPINFO startupinfo;
 544         PROCESS_INFORMATION procinfo;
 545         ZeroMemory(&startupinfo, sizeof(STARTUPINFO));
 546         ZeroMemory(&procinfo, sizeof(PROCESS_INFORMATION));
 547
 548         // Fill in the startup info struct
 549         GetStartupInfo(&startupinfo);
 550
 551         /* Default creation flags create the processes suspended */
 552         DWORD startupflags = CREATE_SUSPENDED;
 553
 554         /* On windows 2003/XP and above, we can use the value
 555          * CREATE_PRESERVE_CODE_AUTHZ_LEVEL which gives more access
 556          * to the process which we may require on these operating systems.
 557          */
 558         OSVERSIONINFO vi;
 559         vi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
 560         GetVersionEx(&vi);
 561         if ((vi.dwMajorVersion >= 5) && (vi.dwMinorVersion > 0))
 562                 startupflags |= CREATE_PRESERVE_CODE_AUTHZ_LEVEL;
 563
 564         // Launch our "forked" process.
 565         BOOL bSuccess = CreateProcess ( module, // Module (exe) filename
 566                 strdup(GetCommandLine()),       // Command line (exe plus parameters from the OS)
 567                                                 // NOTE: We cannot return the direct value of the
 568                                                 // GetCommandLine function here, as the pointer is
 569                                                 // passed straight to the child process, and will be
 570                                                 // invalid once we exit as it goes out of context.
 571                                                 // strdup() seems ok, though.
 572                 0,                              // PROCESS_SECURITY_ATTRIBUTES
 573                 0,                              // THREAD_SECURITY_ATTRIBUTES
 574                 TRUE,                           // We went to inherit handles.
 575                 startupflags,                   // Allow us full access to the process and suspend it.
 576                 0,                              // ENVIRONMENT
 577                 0,                              // CURRENT_DIRECTORY
 578                 &startupinfo,                   // startup info
 579                 &procinfo);                     // process info
 580
 581         if(!bSuccess)
 582         {
 583                 printf("CreateProcess() error: %s\n", dlerror());
 584                 return false;
 585         }
 586
 587         // Set the owner process id in the target process.
 588         SIZE_T written = 0;
 589         DWORD pid = GetCurrentProcessId();
 590         if(!WriteProcessMemory(procinfo.hProcess, &owner_processid, &pid, sizeof(DWORD), &written) || written != sizeof(DWORD))
 591         {
 592                 printf("WriteProcessMemory() failed: %s\n", dlerror());
 593                 return false;
 594         }
 595
 596         // Resume the other thread (let it start)
 597         ResumeThread(procinfo.hThread);
 598
 599         // Wait for the new process to kill us. If there is some error, the new process will end and we will end up at the next line.
 600         WaitForSingleObject(procinfo.hProcess, INFINITE);
 601
 602         // If we hit this it means startup failed, default to 14 if this fails.
 603         DWORD ExitCode = 14;
 604         GetExitCodeProcess(procinfo.hProcess, &ExitCode);
 605         CloseHandle(procinfo.hThread);
 606         CloseHandle(procinfo.hProcess);
 607         return ExitCode;
 608 }
 609
 610 void WindowsForkKillOwner(InspIRCd * Instance)
 611 {
 612         HANDLE hProcess = OpenProcess(PROCESS_TERMINATE, FALSE, owner_processid);
 613         if(!hProcess || !owner_processid)
 614         {
 615                 printf("Could not open process id %u: %s.\n", owner_processid, dlerror());
 616                 Instance->Exit(14);
 617         }
 618
 619         // die die die
 620         if(!TerminateProcess(hProcess, 0))
 621         {
 622                 printf("Could not TerminateProcess(): %s\n", dlerror());
 623                 Instance->Exit(14);
 624         }
 625
 626         CloseHandle(hProcess);
 627 }
 628
 629 bool ValidateWindowsDnsServer(ServerConfig* conf, const char* tag, const char* value, ValueItem &data)
 630 {
 631         if (!*(data.GetString()))
 632         {
 633                 std::string nameserver;
 634                 conf->GetInstance()->Log(DEFAULT,"WARNING: <dns:server> not defined, attempting to find working server in the registry...");
 635                 nameserver = FindNameServerWin();
 636                 /* Windows stacks multiple nameservers in one registry key, seperated by commas.
 637                  * Spotted by Cataclysm.
 638                  */
 639                 if (nameserver.find(',') != std::string::npos)
 640                         nameserver = nameserver.substr(0, nameserver.find(','));
 641                 data.Set(nameserver.c_str());
 642                 conf->GetInstance()->Log(DEFAULT,"<dns:server> set to '%s' as first active resolver in registry.", nameserver.c_str());
 643         }
 644         return true;
 645 }