src/client/main.c

   1 /*
   2  * OpenDispense 2
   3  * UCC (University [of WA] Computer Club) Electronic Accounting System
   4  * - Dispense Client
   5  *
   6  * main.c - Core and Initialisation
   7  *
   8  * This file is licenced under the 3-clause BSD Licence. See the file
   9  * COPYING for full details.
  10  */
  11 #include <stdlib.h>
  12 #include <stdio.h>
  13 #include <string.h>
  14 #include <ctype.h>      // isspace
  15 #include <stdarg.h>
  16 #include <regex.h>
  17 #include <ncurses.h>
  18 #include <limits.h>
  19
  20 #include <unistd.h>     // close
  21 #include <netdb.h>      // gethostbyname
  22 #include <pwd.h>        // getpwuids
  23 #include <sys/socket.h>
  24 #include <netinet/in.h>
  25 #include <arpa/inet.h>
  26 #include <openssl/sha.h>        // SHA1
  27
  28 #define USE_NCURSES_INTERFACE   0
  29 #define DEBUG_TRACE_SERVER      0
  30
  31 // === TYPES ===
  32 typedef struct sItem {
  33         char    *Type;
  34          int    ID;
  35         char    *Desc;
  36          int    Price;
  37 }       tItem;
  38
  39 // === PROTOTYPES ===
  40  int    main(int argc, char *argv[]);
  41 void    ShowUsage(void);
  42 // --- GUI ---
  43  int    ShowNCursesUI(void);
  44 void    ShowItemAt(int Row, int Col, int Width, int Index);
  45 void    PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1, const char *Mid, char Pad2, const char *Right, ...);
  46 // --- Coke Server Communication ---
  47  int    OpenConnection(const char *Host, int Port);
  48  int    Authenticate(int Socket);
  49 void    PopulateItemList(int Socket);
  50  int    DispenseItem(int Socket, int ItemID);
  51  int    Dispense_AlterBalance(int Socket, const char *Username, int Ammount, const char *Reason);
  52  int    Dispense_SetBalance(int Socket, const char *Username, int Balance, const char *Reason);
  53  int    Dispense_Give(int Socket, const char *Username, int Ammount, const char *Reason);
  54  int    Dispense_Donate(int Socket, int Ammount, const char *Reason);
  55  int    Dispense_EnumUsers(int Socket);
  56  int    Dispense_ShowUser(int Socket, const char *Username);
  57 void    _PrintUserLine(const char *Line);
  58  int    Dispense_AddUser(int Socket, const char *Username);
  59  int    Dispense_SetUserType(int Socket, const char *Username, const char *TypeString);
  60 // --- Helpers ---
  61 char    *ReadLine(int Socket);
  62  int    sendf(int Socket, const char *Format, ...);
  63 char    *trim(char *string);
  64  int    RunRegex(regex_t *regex, const char *string, int nMatches, regmatch_t *matches, const char *errorMessage);
  65 void    CompileRegex(regex_t *regex, const char *pattern, int flags);
  66
  67 // === GLOBALS ===
  68 char    *gsDispenseServer = "localhost";
  69  int    giDispensePort = 11020;
  70
  71 tItem   *gaItems;
  72  int    giNumItems;
  73 regex_t gArrayRegex, gItemRegex, gSaltRegex, gUserInfoRegex;
  74  int    gbIsAuthenticated = 0;
  75
  76 char    *gsItemPattern; //!< Item pattern
  77 char    *gsEffectiveUser;       //!< '-u' Dispense as another user
  78  int    gbUseNCurses = 0;       //!< '-G' Use the NCurses GUI?
  79  int    giMinimumBalance = INT_MIN;     //!< '-m' Minumum balance for `dispense acct`
  80  int    giMaximumBalance = INT_MAX;     //!< '-M' Maximum balance for `dispense acct`
  81
  82 // === CODE ===
  83 int main(int argc, char *argv[])
  84 {
  85          int    sock;
  86          int    i;
  87         char    buffer[BUFSIZ];
  88
  89         // -- Create regular expressions
  90         // > Code Type Count ...
  91         CompileRegex(&gArrayRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([0-9]+)", REG_EXTENDED);     //
  92         // > Code Type Ident Price Desc
  93         CompileRegex(&gItemRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([A-Za-z]+):([0-9]+)\\s+([0-9]+)\\s+(.+)$", REG_EXTENDED);
  94         // > Code 'SALT' salt
  95         CompileRegex(&gSaltRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+(.+)$", REG_EXTENDED);
  96         // > Code 'User' Username Balance Flags
  97         CompileRegex(&gUserInfoRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([^ ]+)\\s+(-?[0-9]+)\\s+(.+)$", REG_EXTENDED);
  98
  99         // Parse Arguments
 100         for( i = 1; i < argc; i ++ )
 101         {
 102                 char    *arg = argv[i];
 103
 104                 if( arg[0] == '-' )
 105                 {
 106                         switch(arg[1])
 107                         {
 108                         case 'h':
 109                         case '?':
 110                                 ShowUsage();
 111                                 return 0;
 112
 113                         case 'm':       // Minimum balance
 114                                 giMinimumBalance = atoi(argv[++i]);
 115                                 break;
 116                         case 'M':       // Maximum balance
 117                                 giMaximumBalance = atoi(argv[++i]);
 118                                 break;
 119
 120                         case 'u':       // Override User
 121                                 gsEffectiveUser = argv[++i];
 122                                 break;
 123
 124                         case 'G':       // Use GUI
 125                                 gbUseNCurses = 1;
 126                                 break;
 127                         }
 128
 129                         continue;
 130                 }
 131
 132                 //
 133                 // `dispense acct`
 134                 // -
 135                 if( strcmp(arg, "acct") == 0 )
 136                 {
 137                         // Connect to server
 138                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 139                         if( sock < 0 )  return -1;
 140
 141                         // List accounts?
 142                         if( i + 1 == argc ) {
 143                                 Dispense_EnumUsers(sock);
 144                                 return 0;
 145                         }
 146
 147                         // argv[i+1]: Username
 148
 149                         // Alter account?
 150                         if( i + 2 < argc )
 151                         {
 152                                 if( i + 3 >= argc ) {
 153                                         fprintf(stderr, "Error: `dispense acct' needs a reason\n");
 154                                         exit(1);
 155                                 }
 156
 157                                 // Authentication required
 158                                 if( Authenticate(sock) )
 159                                         return -1;
 160
 161                                 // argv[i+1]: Username
 162                                 // argv[i+2]: Ammount
 163                                 // argv[i+3]: Reason
 164
 165                                 if( argv[i+2][0] == '=' ) {
 166                                         // Set balance
 167                                         if( argv[i+2][1] != '0' && atoi(&argv[i+2][1]) == 0 ) {
 168                                                 fprintf(stderr, "Error: Invalid balance to be set\n");
 169                                                 exit(1);
 170                                         }
 171
 172                                         Dispense_SetBalance(sock, argv[i+1], atoi(argv[i+2]+1), argv[i+3]);
 173                                 }
 174                                 else {
 175                                         // Alter balance
 176                                         Dispense_AlterBalance(sock, argv[i+1], atoi(argv[i+2]), argv[i+3]);
 177                                 }
 178                         }
 179
 180                         // Show user information
 181                         Dispense_ShowUser(sock, argv[i+1]);
 182
 183                         close(sock);
 184                         return 0;
 185                 }
 186                 //
 187                 // `dispense give`
 188                 // - "Here, have some money."
 189                 if( strcmp(arg, "give") == 0 )
 190                 {
 191                         if( i + 3 >= argc ) {
 192                                 fprintf(stderr, "`dispense give` takes three arguments\n");
 193                                 ShowUsage();
 194                                 return -1;
 195                         }
 196                         // TODO: `dispense give`
 197
 198                         // argv[i+1]: Destination
 199                         // argv[i+2]: Ammount
 200                         // argv[i+3]: Reason
 201
 202                         // Connect to server
 203                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 204                         if( sock < 0 )  return -1;
 205
 206                         // Authenticate
 207                         if( Authenticate(sock) )
 208                                 return -1;
 209
 210                         Dispense_Give(sock, argv[i+1], atoi(argv[i+2]), argv[i+3]);
 211                         return 0;
 212                 }
 213                 //
 214                 // `dispense user`
 215                 // - User administration (Admin Only)
 216                 if( strcmp(arg, "user") == 0 )
 217                 {
 218                         // Check argument count
 219                         if( i + 1 >= argc ) {
 220                                 fprintf(stderr, "Error: `dispense user` requires arguments\n");
 221                                 ShowUsage();
 222                                 exit(1);
 223                         }
 224
 225                         // Connect to server
 226                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 227                         if( sock < 0 )  return -1;
 228
 229                         // Attempt authentication
 230                         if( Authenticate(sock) )
 231                                 return -1;
 232
 233                         // Add new user?
 234                         if( strcmp(argv[i+1], "add") == 0 )
 235                         {
 236                                 if( i + 2 >= argc ) {
 237                                         fprintf(stderr, "Error: `dispense user add` requires an argument\n");
 238                                         ShowUsage();
 239                                         exit(1);
 240                                 }
 241
 242                                 Dispense_AddUser(sock, argv[i+2]);
 243                         }
 244                         // Update a user
 245                         else if( strcmp(argv[i+1], "type") == 0 )
 246                         {
 247                                 if( i + 3 >= argc ) {
 248                                         fprintf(stderr, "Error: `dispense user type` requires two arguments\n");
 249                                         ShowUsage();
 250                                         exit(1);
 251                                 }
 252
 253                                 Dispense_SetUserType(sock, argv[i+2], argv[i+3]);
 254                         }
 255                         else
 256                         {
 257                                 fprintf(stderr, "Error: Unknown sub-command for `dispense user`\n");
 258                                 ShowUsage();
 259                                 exit(1);
 260                         }
 261                         return 0;
 262                 }
 263
 264                 // Donation!
 265                 if( strcmp(arg, "donate") == 0 )
 266                 {
 267                         // Check argument count
 268                         if( i + 2 >= argc ) {
 269                                 fprintf(stderr, "Error: `dispense donate` requires two arguments\n");
 270                                 ShowUsage();
 271                                 exit(1);
 272                         }
 273
 274                         // Connect to server
 275                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 276                         if( sock < 0 )  return -1;
 277
 278                         // Attempt authentication
 279                         if( Authenticate(sock) )
 280                                 return -1;
 281
 282                         // Do donation
 283                         Dispense_Donate(sock, atoi(argv[i+1]), argv[i+1]);
 284
 285                         return 0;
 286                 }
 287
 288                 else {
 289                         // Item name / pattern
 290                         gsItemPattern = arg;
 291                         break;
 292                 }
 293         }
 294
 295         // Connect to server
 296         sock = OpenConnection(gsDispenseServer, giDispensePort);
 297         if( sock < 0 )  return -1;
 298
 299         // Authenticate
 300         Authenticate(sock);
 301
 302         // Get items
 303         PopulateItemList(sock);
 304
 305         if( gsItemPattern )
 306         {
 307                 // TODO: Implement `dispense <name>`
 308                 printf("TODO: Implement `dispense <name>`\n");
 309                 i = -1;
 310         }
 311         else if( gbUseNCurses )
 312         {
 313                 i = ShowNCursesUI();
 314         }
 315         else
 316         {
 317                 // Very basic dispense interface
 318                 for( i = 0; i < giNumItems; i ++ ) {
 319                         printf("%2i %s:%i\t%3i %s\n", i, gaItems[i].Type, gaItems[i].ID,
 320                                 gaItems[i].Price, gaItems[i].Desc);
 321                 }
 322                 printf(" q Quit\n");
 323                 for(;;)
 324                 {
 325                         char    *buf;
 326
 327                         i = -1;
 328
 329                         fgets(buffer, BUFSIZ, stdin);
 330
 331                         buf = trim(buffer);
 332
 333                         if( buf[0] == 'q' )     break;
 334
 335                         i = atoi(buf);
 336
 337                         if( i != 0 || buf[0] == '0' )
 338                         {
 339                                 if( i < 0 || i >= giNumItems ) {
 340                                         printf("Bad item %i (should be between 0 and %i)\n", i, giNumItems);
 341                                         continue;
 342                                 }
 343                                 break;
 344                         }
 345                 }
 346         }
 347
 348         // Check for a valid item ID
 349         if( i >= 0 )
 350                 DispenseItem(sock, i);
 351
 352         close(sock);
 353
 354         return 0;
 355 }
 356
 357 void ShowUsage(void)
 358 {
 359         printf(
 360                 "Usage:\n"
 361                 "  == Everyone ==\n"
 362                 "    dispense\n"
 363                 "        Show interactive list\n"
 364                 "    dispense <item>\n"
 365                 "        Dispense named item\n"
 366                 "    dispense give <user> <ammount> \"<reason>\"\n"
 367                 "        Give money to another user\n"
 368                 "    dispense donate <ammount> \"<reason>\"\n"
 369                 "        Donate to the club\n"
 370                 "  == Coke members == \n"
 371                 "    dispense acct [<user>]\n"
 372                 "        Show user balances\n"
 373                 "    dispense acct <user> [+-]<ammount> \"<reason>\"\n"
 374                 "        Alter a account value\n"
 375                 "  == Dispense administrators ==\n"
 376                 "    dispense acct <user> =<ammount> \"<reason>\"\n"
 377                 "        Set an account balance\n"
 378                 "    dispense user add <user>\n"
 379                 "        Create new coke account (Admins only)\n"
 380                 "    dispense user type <user> <flags>\n"
 381                 "        Alter a user's flags\n"
 382                 "        <flags> is a comma-separated list of user, coke, admin or disabled\n"
 383                 "        Flags are removed by preceding the name with '-' or '!'\n"
 384                 "\n"
 385                 "General Options:\n"
 386                 "    -u <username>\n"
 387                 "        Set a different user (Coke members only)\n"
 388                 "    -h / -?\n"
 389                 "        Show help text\n"
 390                 "    -G\n"
 391                 "        Use alternate GUI\n"
 392                 "    -m <min balance>\n"
 393                 "    -M <max balance>\n"
 394                 "        Set the Maximum/Minimum balances shown in `dispense acct`\n"
 395                 );
 396 }
 397
 398 // -------------------
 399 // --- NCurses GUI ---
 400 // -------------------
 401 /**
 402  * \brief Render the NCurses UI
 403  */
 404 int ShowNCursesUI(void)
 405 {
 406         // TODO: ncurses interface (with separation between item classes)
 407         // - Hmm... that would require standardising the item ID to be <class>:<index>
 408         // Oh, why not :)
 409          int    ch;
 410          int    i, times;
 411          int    xBase, yBase;
 412         const int       displayMinWidth = 40;
 413         const int       displayMinItems = 8;
 414         char    *titleString = "Dispense";
 415          int    itemCount = displayMinItems;
 416          int    itemBase = 0;
 417          int    currentItem = 0;
 418          int    ret = -2;       // -2: Used for marking "no return yet"
 419
 420          int    height, width;
 421
 422         // Enter curses mode
 423         initscr();
 424         raw(); noecho();
 425
 426         // Get item count
 427         // - 6: randomly chosen (Need at least 3)
 428         itemCount = LINES - 6;
 429         if( itemCount > giNumItems )
 430                 itemCount = giNumItems;
 431
 432         // Get dimensions
 433         height = itemCount + 3;
 434         width = displayMinWidth;
 435
 436         // Get positions
 437         xBase = COLS/2 - width/2;
 438         yBase = LINES/2 - height/2;
 439
 440         for( ;; )
 441         {
 442                 // Header
 443                 PrintAlign(yBase, xBase, width, "/", '-', titleString, '-', "\\");
 444
 445                 // Items
 446                 for( i = 0; i < itemCount; i ++ )
 447                 {
 448                         move( yBase + 1 + i, xBase );
 449
 450                         if( currentItem == itemBase + i ) {
 451                                 printw("| -> ");
 452                         }
 453                         else {
 454                                 printw("|    ");
 455                         }
 456
 457                         // Check for ... row
 458                         // - Oh god, magic numbers!
 459                         if( i == 0 && itemBase > 0 ) {
 460                                 printw("   ...");
 461                                 times = width-1 - 8 - 3;
 462                                 while(times--)  addch(' ');
 463                         }
 464                         else if( i == itemCount - 1 && itemBase < giNumItems - itemCount ) {
 465                                 printw("   ...");
 466                                 times = width-1 - 8 - 3;
 467                                 while(times--)  addch(' ');
 468                         }
 469                         // Show an item
 470                         else {
 471                                 ShowItemAt( yBase + 1 + i, xBase + 5, width - 7, itemBase + i);
 472                                 addch(' ');
 473                         }
 474
 475                         // Scrollbar (if needed)
 476                         if( giNumItems > itemCount ) {
 477                                 if( i == 0 ) {
 478                                         addch('A');
 479                                 }
 480                                 else if( i == itemCount - 1 ) {
 481                                         addch('V');
 482                                 }
 483                                 else {
 484                                          int    percentage = itemBase * 100 / (giNumItems-itemCount);
 485                                         if( i-1 == percentage*(itemCount-3)/100 ) {
 486                                                 addch('#');
 487                                         }
 488                                         else {
 489                                                 addch('|');
 490                                         }
 491                                 }
 492                         }
 493                         else {
 494                                 addch('|');
 495                         }
 496                 }
 497
 498                 // Footer
 499                 PrintAlign(yBase+height-2, xBase, width, "\\", '-', "", '-', "/");
 500
 501                 // Get input
 502                 ch = getch();
 503
 504                 if( ch == '\x1B' ) {
 505                         ch = getch();
 506                         if( ch == '[' ) {
 507                                 ch = getch();
 508
 509                                 switch(ch)
 510                                 {
 511                                 case 'B':
 512                                         //if( itemBase < giNumItems - (itemCount) )
 513                                         //      itemBase ++;
 514                                         if( currentItem < giNumItems - 1 )
 515                                                 currentItem ++;
 516                                         if( itemBase + itemCount - 1 <= currentItem && itemBase + itemCount < giNumItems )
 517                                                 itemBase ++;
 518                                         break;
 519                                 case 'A':
 520                                         //if( itemBase > 0 )
 521                                         //      itemBase --;
 522                                         if( currentItem > 0 )
 523                                                 currentItem --;
 524                                         if( itemBase + 1 > currentItem && itemBase > 0 )
 525                                                 itemBase --;
 526                                         break;
 527                                 }
 528                         }
 529                         else {
 530
 531                         }
 532                 }
 533                 else {
 534                         switch(ch)
 535                         {
 536                         case '\n':
 537                                 ret = currentItem;
 538                                 break;
 539                         case 'q':
 540                                 ret = -1;       // -1: Return with no dispense
 541                                 break;
 542                         }
 543
 544                         // Check if the return value was changed
 545                         if( ret != -2 ) break;
 546                 }
 547
 548         }
 549
 550
 551         // Leave
 552         endwin();
 553         return ret;
 554 }
 555
 556 /**
 557  * \brief Show item \a Index at (\a Col, \a Row)
 558  * \note Part of the NCurses UI
 559  */
 560 void ShowItemAt(int Row, int Col, int Width, int Index)
 561 {
 562          int    _x, _y, times;
 563         char    *name;
 564          int    price;
 565
 566         move( Row, Col );
 567
 568         if( Index < 0 || Index >= giNumItems ) {
 569                 name = "OOR";
 570                 price = 0;
 571         }
 572         else {
 573                 name = gaItems[Index].Desc;
 574                 price = gaItems[Index].Price;
 575         }
 576
 577         printw("%02i %s", Index, name);
 578
 579         getyx(stdscr, _y, _x);
 580         // Assumes max 4 digit prices
 581         times = Width - 4 - (_x - Col); // TODO: Better handling for large prices
 582         while(times--)  addch(' ');
 583         printw("%4i", price);
 584 }
 585
 586 /**
 587  * \brief Print a three-part string at the specified position (formatted)
 588  * \note NCurses UI Helper
 589  *
 590  * Prints \a Left on the left of the area, \a Right on the righthand side
 591  * and \a Mid in the middle of the area. These are padded with \a Pad1
 592  * between \a Left and \a Mid, and \a Pad2 between \a Mid and \a Right.
 593  *
 594  * ::printf style format codes are allowed in \a Left, \a Mid and \a Right,
 595  * and the arguments to these are read in that order.
 596  */
 597 void PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1,
 598         const char *Mid, char Pad2, const char *Right, ...)
 599 {
 600          int    lLen, mLen, rLen;
 601          int    times;
 602
 603         va_list args;
 604
 605         // Get the length of the strings
 606         va_start(args, Right);
 607         lLen = vsnprintf(NULL, 0, Left, args);
 608         mLen = vsnprintf(NULL, 0, Mid, args);
 609         rLen = vsnprintf(NULL, 0, Right, args);
 610         va_end(args);
 611
 612         // Sanity check
 613         if( lLen + mLen/2 > Width/2 || mLen/2 + rLen > Width/2 ) {
 614                 return ;        // TODO: What to do?
 615         }
 616
 617         move(Row, Col);
 618
 619         // Render strings
 620         va_start(args, Right);
 621         // - Left
 622         {
 623                 char    tmp[lLen+1];
 624                 vsnprintf(tmp, lLen+1, Left, args);
 625                 addstr(tmp);
 626         }
 627         // - Left padding
 628         times = Width/2 - mLen/2 - lLen;
 629         while(times--)  addch(Pad1);
 630         // - Middle
 631         {
 632                 char    tmp[mLen+1];
 633                 vsnprintf(tmp, mLen+1, Mid, args);
 634                 addstr(tmp);
 635         }
 636         // - Right Padding
 637         times = Width/2 - mLen/2 - rLen;
 638         while(times--)  addch(Pad2);
 639         // - Right
 640         {
 641                 char    tmp[rLen+1];
 642                 vsnprintf(tmp, rLen+1, Right, args);
 643                 addstr(tmp);
 644         }
 645 }
 646
 647 // ---------------------
 648 // --- Coke Protocol ---
 649 // ---------------------
 650 int OpenConnection(const char *Host, int Port)
 651 {
 652         struct hostent  *host;
 653         struct sockaddr_in      serverAddr;
 654          int    sock;
 655
 656         host = gethostbyname(Host);
 657         if( !host ) {
 658                 fprintf(stderr, "Unable to look up '%s'\n", Host);
 659                 return -1;
 660         }
 661
 662         memset(&serverAddr, 0, sizeof(serverAddr));
 663
 664         serverAddr.sin_family = AF_INET;        // IPv4
 665         // NOTE: I have a suspicion that IPv6 will play sillybuggers with this :)
 666         serverAddr.sin_addr.s_addr = *((unsigned long *) host->h_addr_list[0]);
 667         serverAddr.sin_port = htons(Port);
 668
 669         sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 670         if( sock < 0 ) {
 671                 fprintf(stderr, "Failed to create socket\n");
 672                 return -1;
 673         }
 674
 675         #if USE_AUTOAUTH
 676         {
 677                 struct sockaddr_in      localAddr;
 678                 memset(&localAddr, 0, sizeof(localAddr));
 679                 localAddr.sin_family = AF_INET; // IPv4
 680                 localAddr.sin_port = 1023;      // IPv4
 681                 // Attempt to bind to low port for autoauth
 682                 bind(sock, &localAddr, sizeof(localAddr));
 683         }
 684         #endif
 685
 686         if( connect(sock, (struct sockaddr *) &serverAddr, sizeof(serverAddr)) < 0 ) {
 687                 fprintf(stderr, "Failed to connect to server\n");
 688                 return -1;
 689         }
 690
 691         return sock;
 692 }
 693
 694 /**
 695  * \brief Authenticate with the server
 696  * \return Boolean Failure
 697  */
 698 int Authenticate(int Socket)
 699 {
 700         struct passwd   *pwd;
 701         char    *buf;
 702          int    responseCode;
 703         char    salt[32];
 704          int    i;
 705         regmatch_t      matches[4];
 706
 707         if( gbIsAuthenticated ) return 0;
 708
 709         // Get user name
 710         pwd = getpwuid( getuid() );
 711
 712         // Attempt automatic authentication
 713         sendf(Socket, "AUTOAUTH %s\n", pwd->pw_name);
 714
 715         // Check if it worked
 716         buf = ReadLine(Socket);
 717
 718         responseCode = atoi(buf);
 719         switch( responseCode )
 720         {
 721         case 200:       // Autoauth succeeded, return
 722                 free(buf);
 723                 break;
 724
 725         case 401:       // Untrusted, attempt password authentication
 726                 free(buf);
 727
 728                 sendf(Socket, "USER %s\n", pwd->pw_name);
 729                 printf("Using username %s\n", pwd->pw_name);
 730
 731                 buf = ReadLine(Socket);
 732
 733                 // TODO: Get Salt
 734                 // Expected format: 100 SALT <something> ...
 735                 // OR             : 100 User Set
 736                 RunRegex(&gSaltRegex, buf, 4, matches, "Malformed server response");
 737                 responseCode = atoi(buf);
 738                 if( responseCode != 100 ) {
 739                         fprintf(stderr, "Unknown repsonse code %i from server\n%s\n", responseCode, buf);
 740                         free(buf);
 741                         return -1;      // ERROR
 742                 }
 743
 744                 // Check for salt
 745                 if( memcmp( buf+matches[2].rm_so, "SALT", matches[2].rm_eo - matches[2].rm_so) == 0) {
 746                         // Store it for later
 747                         memcpy( salt, buf + matches[3].rm_so, matches[3].rm_eo - matches[3].rm_so );
 748                         salt[ matches[3].rm_eo - matches[3].rm_so ] = 0;
 749                 }
 750                 free(buf);
 751
 752                 // Give three attempts
 753                 for( i = 0; i < 3; i ++ )
 754                 {
 755                          int    ofs = strlen(pwd->pw_name)+strlen(salt);
 756                         char    tmpBuf[42];
 757                         char    tmp[ofs+20];
 758                         char    *pass = getpass("Password: ");
 759                         uint8_t h[20];
 760
 761                         // Create hash string
 762                         // <username><salt><hash>
 763                         strcpy(tmp, pwd->pw_name);
 764                         strcat(tmp, salt);
 765                         SHA1( (unsigned char*)pass, strlen(pass), h );
 766                         memcpy(tmp+ofs, h, 20);
 767
 768                         // Hash all that
 769                         SHA1( (unsigned char*)tmp, ofs+20, h );
 770                         sprintf(tmpBuf, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 771                                 h[ 0], h[ 1], h[ 2], h[ 3], h[ 4], h[ 5], h[ 6], h[ 7], h[ 8], h[ 9],
 772                                 h[10], h[11], h[12], h[13], h[14], h[15], h[16], h[17], h[18], h[19]
 773                                 );
 774
 775                         // Send password
 776                         sendf(Socket, "PASS %s\n", tmpBuf);
 777                         buf = ReadLine(Socket);
 778
 779                         responseCode = atoi(buf);
 780                         // Auth OK?
 781                         if( responseCode == 200 )       break;
 782                         // Bad username/password
 783                         if( responseCode == 401 )       continue;
 784
 785                         fprintf(stderr, "Unknown repsonse code %i from server\n%s\n", responseCode, buf);
 786                         free(buf);
 787                         return -1;
 788                 }
 789                 free(buf);
 790                 if( i == 3 )
 791                         return 2;       // 2 = Bad Password
 792                 break;
 793
 794         case 404:       // Bad Username
 795                 fprintf(stderr, "Bad Username '%s'\n", pwd->pw_name);
 796                 free(buf);
 797                 return 1;
 798
 799         default:
 800                 fprintf(stderr, "Unkown response code %i from server\n", responseCode);
 801                 printf("%s\n", buf);
 802                 free(buf);
 803                 return -1;
 804         }
 805
 806         // Set effective user
 807         if( gsEffectiveUser ) {
 808                 sendf(Socket, "SETEUSER %s\n", gsEffectiveUser);
 809
 810                 buf = ReadLine(Socket);
 811                 responseCode = atoi(buf);
 812
 813                 switch(responseCode)
 814                 {
 815                 case 200:
 816                         printf("Running as '%s' by '%s'\n", gsEffectiveUser, pwd->pw_name);
 817                         break;
 818
 819                 case 403:
 820                         printf("Only coke members can use `dispense -u`\n");
 821                         free(buf);
 822                         return -1;
 823
 824                 case 404:
 825                         printf("Invalid user selected\n");
 826                         free(buf);
 827                         return -1;
 828
 829                 default:
 830                         fprintf(stderr, "Unkown response code %i from server\n", responseCode);
 831                         printf("%s\n", buf);
 832                         free(buf);
 833                         exit(-1);
 834                 }
 835
 836                 free(buf);
 837         }
 838
 839         gbIsAuthenticated = 1;
 840
 841         return 0;
 842 }
 843
 844
 845 /**
 846  * \brief Fill the item information structure
 847  * \return Boolean Failure
 848  */
 849 void PopulateItemList(int Socket)
 850 {
 851         char    *buf;
 852          int    responseCode;
 853
 854         char    *itemType, *itemStart;
 855          int    count, i;
 856         regmatch_t      matches[4];
 857
 858         // Ask server for stock list
 859         send(Socket, "ENUM_ITEMS\n", 11, 0);
 860         buf = ReadLine(Socket);
 861
 862         //printf("Output: %s\n", buf);
 863
 864         responseCode = atoi(buf);
 865         if( responseCode != 201 ) {
 866                 fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n", responseCode);
 867                 exit(-1);
 868         }
 869
 870         // - Get item list -
 871
 872         // Expected format:
 873         //  201 Items <count>
 874         //  202 Item <count>
 875         RunRegex(&gArrayRegex, buf, 4, matches, "Malformed server response");
 876
 877         itemType = &buf[ matches[2].rm_so ];    buf[ matches[2].rm_eo ] = '\0';
 878         count = atoi( &buf[ matches[3].rm_so ] );
 879
 880         // Check array type
 881         if( strcmp(itemType, "Items") != 0 ) {
 882                 // What the?!
 883                 fprintf(stderr, "Unexpected array type, expected 'Items', got '%s'\n",
 884                         itemType);
 885                 exit(-1);
 886         }
 887
 888         itemStart = &buf[ matches[3].rm_eo ];
 889
 890         free(buf);
 891
 892         giNumItems = count;
 893         gaItems = malloc( giNumItems * sizeof(tItem) );
 894
 895         // Fetch item information
 896         for( i = 0; i < giNumItems; i ++ )
 897         {
 898                 regmatch_t      matches[7];
 899
 900                 // Get item info
 901                 buf = ReadLine(Socket);
 902                 responseCode = atoi(buf);
 903
 904                 if( responseCode != 202 ) {
 905                         fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n", responseCode);
 906                         exit(-1);
 907                 }
 908
 909                 RunRegex(&gItemRegex, buf, 7, matches, "Malformed server response");
 910
 911                 buf[ matches[3].rm_eo ] = '\0';
 912
 913                 gaItems[i].Type = strdup( buf + matches[3].rm_so );
 914                 gaItems[i].ID = atoi( buf + matches[4].rm_so );
 915                 gaItems[i].Price = atoi( buf + matches[5].rm_so );
 916                 gaItems[i].Desc = strdup( buf + matches[6].rm_so );
 917
 918                 free(buf);
 919         }
 920
 921         // Read end of list
 922         buf = ReadLine(Socket);
 923         responseCode = atoi(buf);
 924
 925         if( responseCode != 200 ) {
 926                 fprintf(stderr, "Unknown response from dispense server %i\n'%s'",
 927                         responseCode, buf
 928                         );
 929                 exit(-1);
 930         }
 931
 932         free(buf);
 933 }
 934
 935 /**
 936  * \brief Dispense an item
 937  * \return Boolean Failure
 938  */
 939 int DispenseItem(int Socket, int ItemID)
 940 {
 941          int    ret, responseCode;
 942         char    *buf;
 943
 944         if( ItemID < 0 || ItemID > giNumItems ) return -1;
 945
 946         // Dispense!
 947         sendf(Socket, "DISPENSE %s:%i\n", gaItems[ItemID].Type, gaItems[ItemID].ID);
 948         buf = ReadLine(Socket);
 949
 950         responseCode = atoi(buf);
 951         switch( responseCode )
 952         {
 953         case 200:
 954                 printf("Dispense OK\n");
 955                 ret = 0;
 956                 break;
 957         case 401:
 958                 printf("Not authenticated\n");
 959                 ret = 1;
 960                 break;
 961         case 402:
 962                 printf("Insufficient balance\n");
 963                 ret = 1;
 964                 break;
 965         case 406:
 966                 printf("Bad item name, bug report\n");
 967                 ret = 1;
 968                 break;
 969         case 500:
 970                 printf("Item failed to dispense, is the slot empty?\n");
 971                 ret = 1;
 972                 break;
 973         case 501:
 974                 printf("Dispense not possible (slot empty/permissions)\n");
 975                 ret = 1;
 976                 break;
 977         default:
 978                 printf("Unknown response code %i ('%s')\n", responseCode, buf);
 979                 ret = -2;
 980                 break;
 981         }
 982
 983         free(buf);
 984         return ret;
 985 }
 986
 987 /**
 988  * \brief Alter a user's balance
 989  */
 990 int Dispense_AlterBalance(int Socket, const char *Username, int Ammount, const char *Reason)
 991 {
 992         char    *buf;
 993          int    responseCode;
 994
 995         sendf(Socket, "ADD %s %i %s\n", Username, Ammount, Reason);
 996         buf = ReadLine(Socket);
 997
 998         responseCode = atoi(buf);
 999         free(buf);
1000
1001         switch(responseCode)
1002         {
1003         case 200:       return 0;       // OK
1004         case 402:
1005                 fprintf(stderr, "Insufficient balance\n");
1006                 return 1;
1007         case 403:       // Not in coke
1008                 fprintf(stderr, "You are not in coke (sucker)\n");
1009                 return 1;
1010         case 404:       // Unknown user
1011                 fprintf(stderr, "Unknown user '%s'\n", Username);
1012                 return 2;
1013         default:
1014                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1015                 return -1;
1016         }
1017
1018         return -1;
1019 }
1020
1021 /**
1022  * \brief Set a user's balance
1023  * \note Only avaliable to dispense admins
1024  */
1025 int Dispense_SetBalance(int Socket, const char *Username, int Balance, const char *Reason)
1026 {
1027         char    *buf;
1028          int    responseCode;
1029
1030         sendf(Socket, "SET %s %i %s\n", Username, Balance, Reason);
1031         buf = ReadLine(Socket);
1032
1033         responseCode = atoi(buf);
1034         free(buf);
1035
1036         switch(responseCode)
1037         {
1038         case 200:       return 0;       // OK
1039         case 403:       // Not in coke
1040                 fprintf(stderr, "You are not an admin\n");
1041                 return 1;
1042         case 404:       // Unknown user
1043                 fprintf(stderr, "Unknown user '%s'\n", Username);
1044                 return 2;
1045         default:
1046                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1047                 return -1;
1048         }
1049
1050         return -1;
1051 }
1052
1053 /**
1054  * \brief Give money to another user
1055  */
1056 int Dispense_Give(int Socket, const char *Username, int Ammount, const char *Reason)
1057 {
1058         char    *buf;
1059          int    responseCode;
1060
1061         if( Ammount < 0 ) {
1062                 printf("Sorry, you can only give, you can't take.\n");
1063                 return -1;
1064         }
1065
1066         // Fast return on zero
1067         if( Ammount == 0 ) {
1068                 printf("Are you actually going to give any?\n");
1069                 return 0;
1070         }
1071
1072         sendf(Socket, "GIVE %s %i %s\n", Username, Ammount, Reason);
1073         buf = ReadLine(Socket);
1074
1075         responseCode = atoi(buf);
1076         free(buf);
1077
1078         switch(responseCode)
1079         {
1080         case 200:       return 0;       // OK
1081
1082         case 402:
1083                 fprintf(stderr, "Insufficient balance\n");
1084                 return 1;
1085
1086         case 404:       // Unknown user
1087                 fprintf(stderr, "Unknown user '%s'\n", Username);
1088                 return 2;
1089
1090         default:
1091                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1092                 return -1;
1093         }
1094
1095         return -1;
1096 }
1097
1098
1099 /**
1100  * \brief Donate money to the club
1101  */
1102 int Dispense_Donate(int Socket, int Ammount, const char *Reason)
1103 {
1104         char    *buf;
1105          int    responseCode;
1106
1107         if( Ammount < 0 ) {
1108                 printf("Sorry, you can only give, you can't take.\n");
1109                 return -1;
1110         }
1111
1112         // Fast return on zero
1113         if( Ammount == 0 ) {
1114                 printf("Are you actually going to give any?\n");
1115                 return 0;
1116         }
1117
1118         sendf(Socket, "DONATE %i %s\n", Ammount, Reason);
1119         buf = ReadLine(Socket);
1120
1121         responseCode = atoi(buf);
1122         free(buf);
1123
1124         switch(responseCode)
1125         {
1126         case 200:       return 0;       // OK
1127
1128         case 402:
1129                 fprintf(stderr, "Insufficient balance\n");
1130                 return 1;
1131
1132         default:
1133                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1134                 return -1;
1135         }
1136
1137         return -1;
1138 }
1139
1140 /**
1141  * \brief Enumerate users
1142  */
1143 int Dispense_EnumUsers(int Socket)
1144 {
1145         char    *buf;
1146          int    responseCode;
1147          int    nUsers;
1148         regmatch_t      matches[4];
1149
1150         if( giMinimumBalance != INT_MIN ) {
1151                 if( giMaximumBalance != INT_MAX ) {
1152                         sendf(Socket, "ENUM_USERS min_balance:%i max_balance:%i\n", giMinimumBalance, giMaximumBalance);
1153                 }
1154                 else {
1155                         sendf(Socket, "ENUM_USERS min_balance:%i\n", giMinimumBalance);
1156                 }
1157         }
1158         else {
1159                 if( giMaximumBalance != INT_MAX ) {
1160                         sendf(Socket, "ENUM_USERS max_balance:%i\n", giMaximumBalance);
1161                 }
1162                 else {
1163                         sendf(Socket, "ENUM_USERS\n");
1164                 }
1165         }
1166         buf = ReadLine(Socket);
1167         responseCode = atoi(buf);
1168
1169         switch(responseCode)
1170         {
1171         case 201:       break;  // Ok, length follows
1172
1173         default:
1174                 fprintf(stderr, "Unknown response code %i\n%s\n", responseCode, buf);
1175                 free(buf);
1176                 return -1;
1177         }
1178
1179         // Get count (not actually used)
1180         RunRegex(&gArrayRegex, buf, 4, matches, "Malformed server response");
1181         nUsers = atoi( buf + matches[3].rm_so );
1182         printf("%i users returned\n", nUsers);
1183
1184         // Free string
1185         free(buf);
1186
1187         // Read returned users
1188         do {
1189                 buf = ReadLine(Socket);
1190                 responseCode = atoi(buf);
1191
1192                 if( responseCode != 202 )       break;
1193
1194                 _PrintUserLine(buf);
1195                 free(buf);
1196         } while(responseCode == 202);
1197
1198         // Check final response
1199         if( responseCode != 200 ) {
1200                 fprintf(stderr, "Unknown response code %i\n%s\n", responseCode, buf);
1201                 free(buf);
1202                 return -1;
1203         }
1204
1205         free(buf);
1206
1207         return 0;
1208 }
1209
1210 int Dispense_ShowUser(int Socket, const char *Username)
1211 {
1212         char    *buf;
1213          int    responseCode, ret;
1214
1215         sendf(Socket, "USER_INFO %s\n", Username);
1216         buf = ReadLine(Socket);
1217
1218         responseCode = atoi(buf);
1219
1220         switch(responseCode)
1221         {
1222         case 202:
1223                 _PrintUserLine(buf);
1224                 ret = 0;
1225                 break;
1226
1227         case 404:
1228                 printf("Unknown user '%s'\n", Username);
1229                 ret = 1;
1230                 break;
1231
1232         default:
1233                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
1234                 ret = -1;
1235                 break;
1236         }
1237
1238         free(buf);
1239
1240         return ret;
1241 }
1242
1243 void _PrintUserLine(const char *Line)
1244 {
1245         regmatch_t      matches[6];
1246          int    bal;
1247
1248         RunRegex(&gUserInfoRegex, Line, 6, matches, "Malformed server response");
1249         // 3: Username
1250         // 4: Balance
1251         // 5: Flags
1252         {
1253                  int    usernameLen = matches[3].rm_eo - matches[3].rm_so;
1254                 char    username[usernameLen + 1];
1255                  int    flagsLen = matches[5].rm_eo - matches[5].rm_so;
1256                 char    flags[flagsLen + 1];
1257
1258                 memcpy(username, Line + matches[3].rm_so, usernameLen);
1259                 username[usernameLen] = '\0';
1260                 memcpy(flags, Line + matches[5].rm_so, flagsLen);
1261                 flags[flagsLen] = '\0';
1262
1263                 bal = atoi(Line + matches[4].rm_so);
1264                 printf("%-15s: $%4i.%02i (%s)\n", username, bal/100, abs(bal)%100, flags);
1265         }
1266 }
1267
1268 int Dispense_AddUser(int Socket, const char *Username)
1269 {
1270         char    *buf;
1271          int    responseCode, ret;
1272
1273         sendf(Socket, "USER_ADD %s\n", Username);
1274
1275         buf = ReadLine(Socket);
1276         responseCode = atoi(buf);
1277
1278         switch(responseCode)
1279         {
1280         case 200:
1281                 printf("User '%s' added\n", Username);
1282                 ret = 0;
1283                 break;
1284
1285         case 403:
1286                 printf("Only wheel can add users\n");
1287                 ret = 1;
1288                 break;
1289
1290         case 404:
1291                 printf("User '%s' already exists\n", Username);
1292                 ret = 0;
1293                 break;
1294
1295         default:
1296                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
1297                 ret = -1;
1298                 break;
1299         }
1300
1301         free(buf);
1302
1303         return ret;
1304 }
1305
1306 int Dispense_SetUserType(int Socket, const char *Username, const char *TypeString)
1307 {
1308         char    *buf;
1309          int    responseCode, ret;
1310
1311         // TODO: Pre-validate the string
1312
1313         sendf(Socket, "USER_FLAGS %s %s\n", Username, TypeString);
1314
1315         buf = ReadLine(Socket);
1316         responseCode = atoi(buf);
1317
1318         switch(responseCode)
1319         {
1320         case 200:
1321                 printf("User '%s' updated\n", Username);
1322                 ret = 0;
1323                 break;
1324
1325         case 403:
1326                 printf("Only wheel can modify users\n");
1327                 ret = 1;
1328                 break;
1329
1330         case 404:
1331                 printf("User '%s' does not exist\n", Username);
1332                 ret = 0;
1333                 break;
1334
1335         case 407:
1336                 printf("Flag string is invalid\n");
1337                 ret = 0;
1338                 break;
1339
1340         default:
1341                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
1342                 ret = -1;
1343                 break;
1344         }
1345
1346         free(buf);
1347
1348         return ret;
1349 }
1350
1351 // ---------------
1352 // --- Helpers ---
1353 // ---------------
1354 char *ReadLine(int Socket)
1355 {
1356         static char     buf[BUFSIZ];
1357         static int      bufPos = 0;
1358         static int      bufValid = 0;
1359          int    len;
1360         char    *newline = NULL;
1361          int    retLen = 0;
1362         char    *ret = malloc(10);
1363
1364         #if DEBUG_TRACE_SERVER
1365         printf("ReadLine: ");
1366         #endif
1367         fflush(stdout);
1368
1369         ret[0] = '\0';
1370
1371         while( !newline )
1372         {
1373                 if( bufValid ) {
1374                         len = bufValid;
1375                 }
1376                 else {
1377                         len = recv(Socket, buf+bufPos, BUFSIZ-1-bufPos, 0);
1378                         buf[bufPos+len] = '\0';
1379                 }
1380
1381                 newline = strchr( buf+bufPos, '\n' );
1382                 if( newline ) {
1383                         *newline = '\0';
1384                 }
1385
1386                 retLen += strlen(buf+bufPos);
1387                 ret = realloc(ret, retLen + 1);
1388                 strcat( ret, buf+bufPos );
1389
1390                 if( newline ) {
1391                          int    newLen = newline - (buf+bufPos) + 1;
1392                         bufValid = len - newLen;
1393                         bufPos += newLen;
1394                 }
1395                 if( len + bufPos == BUFSIZ - 1 )        bufPos = 0;
1396         }
1397
1398         #if DEBUG_TRACE_SERVER
1399         printf("%i '%s'\n", retLen, ret);
1400         #endif
1401
1402         return ret;
1403 }
1404
1405 int sendf(int Socket, const char *Format, ...)
1406 {
1407         va_list args;
1408          int    len;
1409
1410         va_start(args, Format);
1411         len = vsnprintf(NULL, 0, Format, args);
1412         va_end(args);
1413
1414         {
1415                 char    buf[len+1];
1416                 va_start(args, Format);
1417                 vsnprintf(buf, len+1, Format, args);
1418                 va_end(args);
1419
1420                 #if DEBUG_TRACE_SERVER
1421                 printf("sendf: %s", buf);
1422                 #endif
1423
1424                 return send(Socket, buf, len, 0);
1425         }
1426 }
1427
1428 char *trim(char *string)
1429 {
1430          int    i;
1431
1432         while( isspace(*string) )
1433                 string ++;
1434
1435         for( i = strlen(string); i--; )
1436         {
1437                 if( isspace(string[i]) )
1438                         string[i] = '\0';
1439                 else
1440                         break;
1441         }
1442
1443         return string;
1444 }
1445
1446 int RunRegex(regex_t *regex, const char *string, int nMatches, regmatch_t *matches, const char *errorMessage)
1447 {
1448          int    ret;
1449
1450         ret = regexec(regex, string, nMatches, matches, 0);
1451         if( ret ) {
1452                 size_t  len = regerror(ret, regex, NULL, 0);
1453                 char    errorStr[len];
1454                 regerror(ret, regex, errorStr, len);
1455                 printf("string = '%s'\n", string);
1456                 fprintf(stderr, "%s\n%s", errorMessage, errorStr);
1457                 exit(-1);
1458         }
1459
1460         return ret;
1461 }
1462
1463 void CompileRegex(regex_t *regex, const char *pattern, int flags)
1464 {
1465          int    ret = regcomp(regex, pattern, flags);
1466         if( ret ) {
1467                 size_t  len = regerror(ret, regex, NULL, 0);
1468                 char    errorStr[len];
1469                 regerror(ret, regex, errorStr, len);
1470                 fprintf(stderr, "Regex compilation failed - %s\n", errorStr);
1471                 exit(-1);
1472         }
1473 }