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 #define USE_AUTOAUTH    1
  31
  32 enum eUI_Modes
  33 {
  34         UI_MODE_BASIC,  // Non-NCurses
  35         UI_MODE_STANDARD,
  36         UI_MODE_DRINKSONLY,
  37         UI_MODE_ALL,
  38         NUM_UI_MODES
  39 };
  40
  41 // === TYPES ===
  42 typedef struct sItem {
  43         char    *Type;
  44          int    ID;
  45          int    Status; // 0: Availiable, 1: Sold out, -1: Error
  46         char    *Desc;
  47          int    Price;
  48 }       tItem;
  49
  50 // === PROTOTYPES ===
  51  int    main(int argc, char *argv[]);
  52 void    ShowUsage(void);
  53 // --- GUI ---
  54  int    ShowNCursesUI(void);
  55  int    ShowItemAt(int Row, int Col, int Width, int Index, int bHilighted);
  56 void    PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1, const char *Mid, char Pad2, const char *Right, ...);
  57 // --- Coke Server Communication ---
  58  int    OpenConnection(const char *Host, int Port);
  59  int    Authenticate(int Socket);
  60  int    GetUserBalance(int Socket);
  61 void    PopulateItemList(int Socket);
  62  int    Dispense_ItemInfo(int Socket, const char *Type, int ID);
  63  int    DispenseItem(int Socket, const char *Type, int ID);
  64  int    Dispense_AlterBalance(int Socket, const char *Username, int Ammount, const char *Reason);
  65  int    Dispense_SetBalance(int Socket, const char *Username, int Balance, const char *Reason);
  66  int    Dispense_Give(int Socket, const char *Username, int Ammount, const char *Reason);
  67  int    Dispense_Donate(int Socket, int Ammount, const char *Reason);
  68  int    Dispense_EnumUsers(int Socket);
  69  int    Dispense_ShowUser(int Socket, const char *Username);
  70 void    _PrintUserLine(const char *Line);
  71  int    Dispense_AddUser(int Socket, const char *Username);
  72  int    Dispense_SetUserType(int Socket, const char *Username, const char *TypeString);
  73 // --- Helpers ---
  74 char    *ReadLine(int Socket);
  75  int    sendf(int Socket, const char *Format, ...);
  76 char    *trim(char *string);
  77  int    RunRegex(regex_t *regex, const char *string, int nMatches, regmatch_t *matches, const char *errorMessage);
  78 void    CompileRegex(regex_t *regex, const char *pattern, int flags);
  79
  80 // === GLOBALS ===
  81 char    *gsDispenseServer = "heathred";
  82  int    giDispensePort = 11020;
  83
  84 tItem   *gaItems;
  85  int    giNumItems;
  86 regex_t gArrayRegex, gItemRegex, gSaltRegex, gUserInfoRegex, gUserItemIdentRegex;
  87  int    gbIsAuthenticated = 0;
  88
  89 char    *gsItemPattern; //!< Item pattern
  90 char    *gsEffectiveUser;       //!< '-u' Dispense as another user
  91  int    giUIMode = UI_MODE_STANDARD;
  92  int    gbDryRun = 0;   //!< '-n' Read-only
  93  int    giMinimumBalance = INT_MIN;     //!< '-m' Minumum balance for `dispense acct`
  94  int    giMaximumBalance = INT_MAX;     //!< '-M' Maximum balance for `dispense acct`
  95 char    *gsUserName;    //!< User that dispense will happen as
  96 char    *gsUserFlags;   //!< User's flag set
  97  int    giUserBalance=-1;       //!< User balance (set by Authenticate)
  98
  99 // === CODE ===
 100 int main(int argc, char *argv[])
 101 {
 102          int    sock;
 103          int    i;
 104         char    buffer[BUFSIZ];
 105
 106         // -- Create regular expressions
 107         // > Code Type Count ...
 108         CompileRegex(&gArrayRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([0-9]+)", REG_EXTENDED);     //
 109         // > Code Type Ident Status Price Desc
 110         CompileRegex(&gItemRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([A-Za-z]+):([0-9]+)\\s+(avail|sold|error)\\s+([0-9]+)\\s+(.+)$", REG_EXTENDED);
 111         // > Code 'SALT' salt
 112         CompileRegex(&gSaltRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+(.+)$", REG_EXTENDED);
 113         // > Code 'User' Username Balance Flags
 114         CompileRegex(&gUserInfoRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([^ ]+)\\s+(-?[0-9]+)\\s+(.+)$", REG_EXTENDED);
 115         // > Item Ident
 116         CompileRegex(&gUserItemIdentRegex, "^([A-Za-z]+):([0-9]+)$", REG_EXTENDED);
 117
 118         // Parse Arguments
 119         for( i = 1; i < argc; i ++ )
 120         {
 121                 char    *arg = argv[i];
 122
 123                 if( arg[0] == '-' )
 124                 {
 125                         switch(arg[1])
 126                         {
 127                         case 'h':
 128                         case '?':
 129                                 ShowUsage();
 130                                 return 0;
 131
 132                         case 'm':       // Minimum balance
 133                                 if( i + 1 >= argc ) {
 134                                         fprintf(stderr, "%s: -m takes an argument\n", argv[0]);
 135                                         ShowUsage();
 136                                 }
 137                                 giMinimumBalance = atoi(argv[++i]);
 138                                 break;
 139                         case 'M':       // Maximum balance
 140                                 if( i + 1 >= argc ) {
 141                                         fprintf(stderr, "%s: -M takes an argument\n", argv[0]);
 142                                         ShowUsage();
 143                                 }
 144                                 giMaximumBalance = atoi(argv[++i]);
 145                                 break;
 146
 147                         case 'u':       // Override User
 148                                 if( i + 1 >= argc ) {
 149                                         fprintf(stderr, "%s: -u takes an argument\n", argv[0]);
 150                                         ShowUsage();
 151                                 }
 152                                 gsEffectiveUser = argv[++i];
 153                                 break;
 154
 155                         case 'H':       // Override remote host
 156                                 if( i + 1 >= argc ) {
 157                                         fprintf(stderr, "%s: -H takes an argument\n", argv[0]);
 158                                         ShowUsage();
 159                                 }
 160                                 gsDispenseServer = argv[++i];
 161                                 break;
 162                         case 'P':       // Override remote port
 163                                 if( i + 1 >= argc ) {
 164                                         fprintf(stderr, "%s: -P takes an argument\n", argv[0]);
 165                                         ShowUsage();
 166                                 }
 167                                 giDispensePort = atoi(argv[++i]);
 168                                 break;
 169
 170                         case 'G':       // Don't use GUI
 171                                 giUIMode = UI_MODE_BASIC;
 172                                 break;
 173                         case 'D':       // Drinks only
 174                                 giUIMode = UI_MODE_DRINKSONLY;
 175                                 break;
 176                         case 'n':       // Dry Run / read-only
 177                                 gbDryRun = 1;
 178                                 break;
 179                         }
 180
 181                         continue;
 182                 }
 183
 184                 //
 185                 // `dispense acct`
 186                 // -
 187                 if( strcmp(arg, "acct") == 0 )
 188                 {
 189                         // Connect to server
 190                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 191                         if( sock < 0 )  return -1;
 192
 193                         // List accounts?
 194                         if( i + 1 == argc ) {
 195                                 Dispense_EnumUsers(sock);
 196                                 return 0;
 197                         }
 198
 199                         // argv[i+1]: Username
 200
 201                         // Alter account?
 202                         if( i + 2 < argc )
 203                         {
 204                                 if( i + 3 >= argc ) {
 205                                         fprintf(stderr, "Error: `dispense acct' needs a reason\n");
 206                                         exit(1);
 207                                 }
 208
 209                                 // Authentication required
 210                                 if( Authenticate(sock) )
 211                                         return -1;
 212
 213                                 // argv[i+1]: Username
 214                                 // argv[i+2]: Ammount
 215                                 // argv[i+3]: Reason
 216
 217                                 if( argv[i+2][0] == '=' ) {
 218                                         // Set balance
 219                                         if( argv[i+2][1] != '0' && atoi(&argv[i+2][1]) == 0 ) {
 220                                                 fprintf(stderr, "Error: Invalid balance to be set\n");
 221                                                 exit(1);
 222                                         }
 223
 224                                         Dispense_SetBalance(sock, argv[i+1], atoi(argv[i+2]+1), argv[i+3]);
 225                                 }
 226                                 else {
 227                                         // Alter balance
 228                                         Dispense_AlterBalance(sock, argv[i+1], atoi(argv[i+2]), argv[i+3]);
 229                                 }
 230                         }
 231
 232                         // Show user information
 233                         Dispense_ShowUser(sock, argv[i+1]);
 234
 235                         close(sock);
 236                         return 0;
 237                 }
 238                 //
 239                 // `dispense give`
 240                 // - "Here, have some money."
 241                 if( strcmp(arg, "give") == 0 )
 242                 {
 243                         if( i + 3 >= argc ) {
 244                                 fprintf(stderr, "`dispense give` takes three arguments\n");
 245                                 ShowUsage();
 246                                 return -1;
 247                         }
 248
 249                         // argv[i+1]: Destination
 250                         // argv[i+2]: Ammount
 251                         // argv[i+3]: Reason
 252
 253                         // Connect to server
 254                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 255                         if( sock < 0 )  return -1;
 256
 257                         // Authenticate
 258                         if( Authenticate(sock) )
 259                                 return -1;
 260
 261                         Dispense_Give(sock, argv[i+1], atoi(argv[i+2]), argv[i+3]);
 262                         return 0;
 263                 }
 264                 //
 265                 // `dispense user`
 266                 // - User administration (Admin Only)
 267                 if( strcmp(arg, "user") == 0 )
 268                 {
 269                         // Check argument count
 270                         if( i + 1 >= argc ) {
 271                                 fprintf(stderr, "Error: `dispense user` requires arguments\n");
 272                                 ShowUsage();
 273                                 exit(1);
 274                         }
 275
 276                         // Connect to server
 277                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 278                         if( sock < 0 )  return -1;
 279
 280                         // Attempt authentication
 281                         if( Authenticate(sock) )
 282                                 return -1;
 283
 284                         // Add new user?
 285                         if( strcmp(argv[i+1], "add") == 0 )
 286                         {
 287                                 if( i + 2 >= argc ) {
 288                                         fprintf(stderr, "Error: `dispense user add` requires an argument\n");
 289                                         ShowUsage();
 290                                         exit(1);
 291                                 }
 292
 293                                 Dispense_AddUser(sock, argv[i+2]);
 294                         }
 295                         // Update a user
 296                         else if( strcmp(argv[i+1], "type") == 0 )
 297                         {
 298                                 if( i + 3 >= argc ) {
 299                                         fprintf(stderr, "Error: `dispense user type` requires two arguments\n");
 300                                         ShowUsage();
 301                                         exit(1);
 302                                 }
 303
 304                                 Dispense_SetUserType(sock, argv[i+2], argv[i+3]);
 305                         }
 306                         else
 307                         {
 308                                 fprintf(stderr, "Error: Unknown sub-command for `dispense user`\n");
 309                                 ShowUsage();
 310                                 exit(1);
 311                         }
 312                         return 0;
 313                 }
 314
 315                 // Donation!
 316                 if( strcmp(arg, "donate") == 0 )
 317                 {
 318                         // Check argument count
 319                         if( i + 2 >= argc ) {
 320                                 fprintf(stderr, "Error: `dispense donate` requires two arguments\n");
 321                                 ShowUsage();
 322                                 exit(1);
 323                         }
 324
 325                         // Connect to server
 326                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 327                         if( sock < 0 )  return -1;
 328
 329                         // Attempt authentication
 330                         if( Authenticate(sock) )
 331                                 return -1;
 332
 333                         // Do donation
 334                         Dispense_Donate(sock, atoi(argv[i+1]), argv[i+1]);
 335
 336                         return 0;
 337                 }
 338
 339                 else {
 340                         // Item name / pattern
 341                         gsItemPattern = arg;
 342                         break;
 343                 }
 344         }
 345
 346         // Connect to server
 347         sock = OpenConnection(gsDispenseServer, giDispensePort);
 348         if( sock < 0 )  return -1;
 349
 350         // Get the user's balance
 351         GetUserBalance(sock);
 352
 353         // Get items
 354         PopulateItemList(sock);
 355
 356         // Disconnect from server
 357         close(sock);
 358
 359         if( gsItemPattern )
 360         {
 361                 regmatch_t matches[3];
 362                 // Door (hard coded)
 363                 if( strcmp(gsItemPattern, "door") == 0 )
 364                 {
 365                         // Connect, Authenticate, dispense and close
 366                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 367                         if( sock < 0 )  return -1;
 368                         Authenticate(sock);
 369                         DispenseItem(sock, "door", 0);
 370                         close(sock);
 371                         return 0;
 372                 }
 373                 // Item id (<type>:<num>)
 374                 else if( RunRegex(&gUserItemIdentRegex, gsItemPattern, 3, matches, NULL) == 0 )
 375                 {
 376                         char    *ident;
 377                          int    id;
 378
 379                         // Get and finish ident
 380                         ident = gsItemPattern + matches[1].rm_so;
 381                         gsItemPattern[matches[1].rm_eo] = '\0';
 382                         // Get ID
 383                         id = atoi( gsItemPattern + matches[2].rm_so );
 384
 385                         // Connect, Authenticate, dispense and close
 386                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 387                         if( sock < 0 )  return -1;
 388
 389                         Dispense_ItemInfo(sock, ident, id);
 390
 391                         Authenticate(sock);
 392                         DispenseItem(sock, ident, id);
 393                         close(sock);
 394                         return 0;
 395                 }
 396                 // Item number (6 = coke)
 397                 else if( strcmp(gsItemPattern, "0") == 0 || atoi(gsItemPattern) > 0 )
 398                 {
 399                         i = atoi(gsItemPattern);
 400                 }
 401                 // Item prefix
 402                 else
 403                 {
 404                          int    j;
 405                          int    best = -1;
 406                         for( i = 0; i < giNumItems; i ++ )
 407                         {
 408                                 // Prefix match (with case-insensitive match)
 409                                 for( j = 0; gsItemPattern[j]; j ++ )
 410                                 {
 411                                         if( gaItems[i].Desc[j] == gsItemPattern[j] )
 412                                                 continue;
 413                                         if( tolower(gaItems[i].Desc[j]) == tolower(gsItemPattern[j]) )
 414                                                 continue;
 415                                         break;
 416                                 }
 417                                 // Check if the prefix matched
 418                                 if( gsItemPattern[j] != '\0' )
 419                                         continue;
 420
 421                                 // Prefect match
 422                                 if( gaItems[i].Desc[j] == '\0' ) {
 423                                         best = i;
 424                                         break;
 425                                 }
 426
 427                                 // Only one match allowed
 428                                 if( best == -1 ) {
 429                                         best = i;
 430                                 }
 431                                 else {
 432                                         // TODO: Allow ambiguous matches?
 433                                         // or just print a wanrning
 434                                         printf("Warning - Ambiguous pattern, stopping\n");
 435                                         return 1;
 436                                 }
 437                         }
 438
 439                         // Was a match found?
 440                         if( best == -1 )
 441                         {
 442                                 fprintf(stderr, "No item matches the passed string\n");
 443                                 return 1;
 444                         }
 445
 446                         i = best;
 447                 }
 448         }
 449         else if( giUIMode != UI_MODE_BASIC )
 450         {
 451                 i = ShowNCursesUI();
 452         }
 453         else
 454         {
 455                 // Very basic dispense interface
 456                 for( i = 0; i < giNumItems; i ++ ) {
 457                         // Add a separator
 458                         if( i && strcmp(gaItems[i].Type, gaItems[i-1].Type) != 0 )
 459                                 printf("   ---\n");
 460
 461                         printf("%2i %s:%i\t%3i %s\n", i, gaItems[i].Type, gaItems[i].ID,
 462                                 gaItems[i].Price, gaItems[i].Desc);
 463                 }
 464                 printf(" q Quit\n");
 465                 for(;;)
 466                 {
 467                         char    *buf;
 468
 469                         i = -1;
 470
 471                         fgets(buffer, BUFSIZ, stdin);
 472
 473                         buf = trim(buffer);
 474
 475                         if( buf[0] == 'q' )     break;
 476
 477                         i = atoi(buf);
 478
 479                         if( i != 0 || buf[0] == '0' )
 480                         {
 481                                 if( i < 0 || i >= giNumItems ) {
 482                                         printf("Bad item %i (should be between 0 and %i)\n", i, giNumItems);
 483                                         continue;
 484                                 }
 485                                 break;
 486                         }
 487                 }
 488         }
 489
 490
 491         // Check for a valid item ID
 492         if( i >= 0 )
 493         {
 494                 // Connect, Authenticate, dispense and close
 495                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 496                 if( sock < 0 )  return -1;
 497
 498                 Dispense_ItemInfo(sock, gaItems[i].Type, gaItems[i].ID);
 499
 500                 Authenticate(sock);
 501                 DispenseItem(sock, gaItems[i].Type, gaItems[i].ID);
 502                 close(sock);
 503         }
 504
 505         return 0;
 506 }
 507
 508 void ShowUsage(void)
 509 {
 510         printf(
 511                 "Usage:\n"
 512                 "  == Everyone ==\n"
 513                 "    dispense\n"
 514                 "        Show interactive list\n"
 515                 "    dispense <item>\n"
 516                 "        Dispense named item\n"
 517                 "    dispense give <user> <ammount> \"<reason>\"\n"
 518                 "        Give money to another user\n"
 519                 "    dispense donate <ammount> \"<reason>\"\n"
 520                 "        Donate to the club\n"
 521                 "  == Coke members == \n"
 522                 "    dispense acct [<user>]\n"
 523                 "        Show user balances\n"
 524                 "    dispense acct <user> [+-]<ammount> \"<reason>\"\n"
 525                 "        Alter a account value\n"
 526                 "  == Dispense administrators ==\n"
 527                 "    dispense acct <user> =<ammount> \"<reason>\"\n"
 528                 "        Set an account balance\n"
 529                 "    dispense user add <user>\n"
 530                 "        Create new coke account (Admins only)\n"
 531                 "    dispense user type <user> <flags>\n"
 532                 "        Alter a user's flags\n"
 533                 "        <flags> is a comma-separated list of user, coke, admin or disabled\n"
 534                 "        Flags are removed by preceding the name with '-' or '!'\n"
 535                 "\n"
 536                 "General Options:\n"
 537                 "    -u <username>\n"
 538                 "        Set a different user (Coke members only)\n"
 539                 "    -h / -?\n"
 540                 "        Show help text\n"
 541                 "    -G\n"
 542                 "        Use alternate GUI\n"
 543                 "    -m <min balance>\n"
 544                 "    -M <max balance>\n"
 545                 "        Set the Maximum/Minimum balances shown in `dispense acct`\n"
 546                 );
 547 }
 548
 549 // -------------------
 550 // --- NCurses GUI ---
 551 // -------------------
 552 /**
 553  * \brief Render the NCurses UI
 554  */
 555 int ShowNCursesUI(void)
 556 {
 557         // TODO: ncurses interface (with separation between item classes)
 558         // - Hmm... that would require standardising the item ID to be <class>:<index>
 559         // Oh, why not :)
 560          int    ch;
 561          int    i, times;
 562          int    xBase, yBase;
 563         const int       displayMinWidth = 40;
 564         char    *titleString = "Dispense";
 565          int    itemCount;
 566          int    maxItemIndex;
 567          int    itemBase = 0;
 568          int    currentItem;
 569          int    ret = -2;       // -2: Used for marking "no return yet"
 570
 571         char    balance_str[5+1+2+1];   // If $9999.99 is too little, something's wrong
 572         char    *username;
 573         struct passwd *pwd;
 574
 575          int    height, width;
 576
 577         // Get Username
 578         if( gsEffectiveUser )
 579                 username = gsEffectiveUser;
 580         else {
 581                 pwd = getpwuid( getuid() );
 582                 username = pwd->pw_name;
 583         }
 584         // Get balance
 585         snprintf(balance_str, sizeof balance_str, "$%i.%02i", giUserBalance/100, giUserBalance%100);
 586
 587         // Enter curses mode
 588         initscr();
 589         raw(); noecho();
 590
 591         // Get max index
 592         maxItemIndex = ShowItemAt(0, 0, 0, -1, 0);
 593         // Get item count per screen
 594         // - 6: randomly chosen (Need at least 3)
 595         itemCount = LINES - 6;
 596         if( itemCount > maxItemIndex )
 597                 itemCount = maxItemIndex;
 598         // Get first index
 599         currentItem = 0;
 600         while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
 601                 currentItem ++;
 602
 603
 604         // Get dimensions
 605         height = itemCount + 3;
 606         width = displayMinWidth;
 607
 608         // Get positions
 609         xBase = COLS/2 - width/2;
 610         yBase = LINES/2 - height/2;
 611
 612         for( ;; )
 613         {
 614                 // Header
 615                 PrintAlign(yBase, xBase, width, "/", '-', titleString, '-', "\\");
 616
 617                 // Items
 618                 for( i = 0; i < itemCount; i ++ )
 619                 {
 620                          int    pos = 0;
 621
 622                         move( yBase + 1 + i, xBase );
 623                         printw("| ");
 624
 625                         pos += 2;
 626
 627                         // Check for the '...' row
 628                         // - Oh god, magic numbers!
 629                         if( (i == 0 && itemBase > 0)
 630                          || (i == itemCount - 1 && itemBase < maxItemIndex - itemCount) )
 631                         {
 632                                 printw("     ...");     pos += 8;
 633                                 times = (width - pos) - 1;
 634                                 while(times--)  addch(' ');
 635                         }
 636                         // Show an item
 637                         else {
 638                                 ShowItemAt(
 639                                         yBase + 1 + i, xBase + pos,     // Position
 640                                         (width - pos) - 3,      // Width
 641                                         itemBase + i,   // Index
 642                                         !!(currentItem == itemBase + i) // Hilighted
 643                                         );
 644                                 printw("  ");
 645                         }
 646
 647                         // Scrollbar (if needed)
 648                         if( maxItemIndex > itemCount ) {
 649                                 if( i == 0 ) {
 650                                         addch('A');
 651                                 }
 652                                 else if( i == itemCount - 1 ) {
 653                                         addch('V');
 654                                 }
 655                                 else {
 656                                          int    percentage = itemBase * 100 / (maxItemIndex-itemCount);
 657                                         if( i-1 == percentage*(itemCount-3)/100 ) {
 658                                                 addch('#');
 659                                         }
 660                                         else {
 661                                                 addch('|');
 662                                         }
 663                                 }
 664                         }
 665                         else {
 666                                 addch('|');
 667                         }
 668                 }
 669
 670                 // Footer
 671                 PrintAlign(yBase+height-2, xBase, width, "\\", '-', "", '-', "/");
 672
 673                 // User line
 674                 // - Username, balance, flags
 675                 PrintAlign(yBase+height-1, xBase+1, width-2,
 676                         username, ' ', balance_str, ' ', gsUserFlags);
 677
 678
 679                 // Get input
 680                 ch = getch();
 681
 682                 if( ch == '\x1B' ) {
 683                         ch = getch();
 684                         if( ch == '[' ) {
 685                                 ch = getch();
 686
 687                                 switch(ch)
 688                                 {
 689                                 case 'B':
 690                                         currentItem ++;
 691                                         // Skip over spacers
 692                                         while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
 693                                                 currentItem ++;
 694
 695                                         if( currentItem >= maxItemIndex ) {
 696                                                 currentItem = 0;
 697                                                 // Skip over spacers
 698                                                 while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
 699                                                         currentItem ++;
 700                                         }
 701                                         break;
 702                                 case 'A':
 703                                         currentItem --;
 704                                         // Skip over spacers
 705                                         while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
 706                                                 currentItem --;
 707
 708                                         if( currentItem < 0 ) {
 709                                                 currentItem = maxItemIndex - 1;
 710                                                 // Skip over spacers
 711                                                 while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
 712                                                         currentItem --;
 713                                         }
 714                                         break;
 715                                 }
 716                         }
 717                         else {
 718
 719                         }
 720
 721                         if( itemCount > maxItemIndex && currentItem < itemBase + 2 && itemBase > 0 )
 722                                 itemBase = currentItem - 2;
 723                         if( itemCount > maxItemIndex && currentItem > itemBase + itemCount - 2 && itemBase < maxItemIndex-1 )
 724                                 itemBase = currentItem - itemCount + 2;
 725                 }
 726                 else {
 727                         switch(ch)
 728                         {
 729                         case '\n':
 730                                 ret = ShowItemAt(0, 0, 0, currentItem, 0);
 731                                 break;
 732                         case 'q':
 733                                 ret = -1;       // -1: Return with no dispense
 734                                 break;
 735                         }
 736
 737                         // Check if the return value was changed
 738                         if( ret != -2 ) break;
 739                 }
 740
 741         }
 742
 743
 744         // Leave
 745         endwin();
 746         return ret;
 747 }
 748
 749 /**
 750  * \brief Show item \a Index at (\a Col, \a Row)
 751  * \return Dispense index of item
 752  * \note Part of the NCurses UI
 753  */
 754 int ShowItemAt(int Row, int Col, int Width, int Index, int bHilighted)
 755 {
 756          int    _x, _y, times;
 757         char    *name = NULL;
 758          int    price = 0;
 759          int    status = -1;
 760
 761         switch(giUIMode)
 762         {
 763         // Standard UI
 764         // - This assumes that
 765         case UI_MODE_STANDARD:
 766                 // Bounds check
 767                 // Index = -1, request limit
 768                 if( Index < 0 || Index >= giNumItems+2 )
 769                         return giNumItems+2;
 770                 // Drink label
 771                 if( Index == 0 )
 772                 {
 773                         price = 0;
 774                         name = "Coke Machine";
 775                         Index = -1;     // -1 indicates a label
 776                         break;
 777                 }
 778                 Index --;
 779                 // Drinks 0 - 6
 780                 if( Index <= 6 )
 781                 {
 782                         name = gaItems[Index].Desc;
 783                         price = gaItems[Index].Price;
 784                         status = gaItems[Index].Status;
 785                         break;
 786                 }
 787                 Index -= 7;
 788                 // EPS label
 789                 if( Index == 0 )
 790                 {
 791                         price = 0;
 792                         name = "Electronic Payment System";
 793                         Index = -1;     // -1 indicates a label
 794                         break;
 795                 }
 796                 Index --;
 797                 Index += 7;
 798                 name = gaItems[Index].Desc;
 799                 price = gaItems[Index].Price;
 800                 status = gaItems[Index].Status;
 801                 break;
 802         default:
 803                 return -1;
 804         }
 805
 806         // Width = 0, don't print
 807         if( Width > 0 )
 808         {
 809                 move( Row, Col );
 810
 811                 if( Index >= 0 )
 812                 {
 813                         // Show hilight and status
 814                         switch( status )
 815                         {
 816                         case 0:
 817                                 if( bHilighted )
 818                                         printw("-> ");
 819                                 else
 820                                         printw("   ");
 821                                 break;
 822                         case 1:
 823                                 printw("SLD");
 824                                 break;
 825
 826                         default:
 827                         case -1:
 828                                 printw("ERR");
 829                                 break;
 830                         }
 831
 832                         printw(" %s", name);
 833
 834                         getyx(stdscr, _y, _x);
 835                         // Assumes max 4 digit prices
 836                         times = Width - 5 - (_x - Col); // TODO: Better handling for large prices
 837                         while(times--)  addch(' ');
 838
 839                         printw(" %4i", price);
 840                 }
 841                 else
 842                 {
 843                         printw("-- %s", name);
 844                         getyx(stdscr, _y, _x);
 845                         times = Width - 4 - (_x - Col);
 846                         while(times--)  addch(' ');
 847                         printw("    ");
 848                 }
 849         }
 850
 851         // If the item isn't availiable for sale, return -1 (so it's skipped)
 852         if( status )
 853                 Index = -1;
 854
 855         return Index;
 856 }
 857
 858 /**
 859  * \brief Print a three-part string at the specified position (formatted)
 860  * \note NCurses UI Helper
 861  *
 862  * Prints \a Left on the left of the area, \a Right on the righthand side
 863  * and \a Mid in the middle of the area. These are padded with \a Pad1
 864  * between \a Left and \a Mid, and \a Pad2 between \a Mid and \a Right.
 865  *
 866  * ::printf style format codes are allowed in \a Left, \a Mid and \a Right,
 867  * and the arguments to these are read in that order.
 868  */
 869 void PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1,
 870         const char *Mid, char Pad2, const char *Right, ...)
 871 {
 872          int    lLen, mLen, rLen;
 873          int    times;
 874
 875         va_list args;
 876
 877         // Get the length of the strings
 878         va_start(args, Right);
 879         lLen = vsnprintf(NULL, 0, Left, args);
 880         mLen = vsnprintf(NULL, 0, Mid, args);
 881         rLen = vsnprintf(NULL, 0, Right, args);
 882         va_end(args);
 883
 884         // Sanity check
 885         if( lLen + mLen/2 > Width/2 || mLen/2 + rLen > Width/2 ) {
 886                 return ;        // TODO: What to do?
 887         }
 888
 889         move(Row, Col);
 890
 891         // Render strings
 892         va_start(args, Right);
 893         // - Left
 894         {
 895                 char    tmp[lLen+1];
 896                 vsnprintf(tmp, lLen+1, Left, args);
 897                 addstr(tmp);
 898         }
 899         // - Left padding
 900         times = (Width - mLen)/2 - lLen;
 901         while(times--)  addch(Pad1);
 902         // - Middle
 903         {
 904                 char    tmp[mLen+1];
 905                 vsnprintf(tmp, mLen+1, Mid, args);
 906                 addstr(tmp);
 907         }
 908         // - Right Padding
 909         times = (Width - mLen)/2 - rLen;
 910         if( (Width - mLen) % 2 )        times ++;
 911         while(times--)  addch(Pad2);
 912         // - Right
 913         {
 914                 char    tmp[rLen+1];
 915                 vsnprintf(tmp, rLen+1, Right, args);
 916                 addstr(tmp);
 917         }
 918 }
 919
 920 // ---------------------
 921 // --- Coke Protocol ---
 922 // ---------------------
 923 int OpenConnection(const char *Host, int Port)
 924 {
 925         struct hostent  *host;
 926         struct sockaddr_in      serverAddr;
 927          int    sock;
 928
 929         host = gethostbyname(Host);
 930         if( !host ) {
 931                 fprintf(stderr, "Unable to look up '%s'\n", Host);
 932                 return -1;
 933         }
 934
 935         memset(&serverAddr, 0, sizeof(serverAddr));
 936
 937         serverAddr.sin_family = AF_INET;        // IPv4
 938         // NOTE: I have a suspicion that IPv6 will play sillybuggers with this :)
 939         serverAddr.sin_addr.s_addr = *((unsigned long *) host->h_addr_list[0]);
 940         serverAddr.sin_port = htons(Port);
 941
 942         sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 943         if( sock < 0 ) {
 944                 fprintf(stderr, "Failed to create socket\n");
 945                 return -1;
 946         }
 947
 948         if( geteuid() == 0 )
 949         {
 950                  int    i;
 951                 struct sockaddr_in      localAddr;
 952                 memset(&localAddr, 0, sizeof(localAddr));
 953                 localAddr.sin_family = AF_INET; // IPv4
 954
 955                 // Loop through all the top ports until one is avaliable
 956                 for( i = 1001; i < 1024; i ++)
 957                 {
 958                         localAddr.sin_port = htons(i);  // IPv4
 959                         // Attempt to bind to low port for autoauth
 960                         if( bind(sock, (struct sockaddr*)&localAddr, sizeof(localAddr)) == 0 )
 961                                 break;
 962                 }
 963                 if( i == 1024 )
 964                         printf("Warning: AUTOAUTH unavaliable\n");
 965         }
 966
 967         if( connect(sock, (struct sockaddr *) &serverAddr, sizeof(serverAddr)) < 0 ) {
 968                 fprintf(stderr, "Failed to connect to server\n");
 969                 return -1;
 970         }
 971
 972         return sock;
 973 }
 974
 975 /**
 976  * \brief Authenticate with the server
 977  * \return Boolean Failure
 978  */
 979 int Authenticate(int Socket)
 980 {
 981         struct passwd   *pwd;
 982         char    *buf;
 983          int    responseCode;
 984         char    salt[32];
 985          int    i;
 986         regmatch_t      matches[4];
 987
 988         if( gbIsAuthenticated ) return 0;
 989
 990         // Get user name
 991         pwd = getpwuid( getuid() );
 992
 993         // Attempt automatic authentication
 994         sendf(Socket, "AUTOAUTH %s\n", pwd->pw_name);
 995
 996         // Check if it worked
 997         buf = ReadLine(Socket);
 998
 999         responseCode = atoi(buf);
1000         switch( responseCode )
1001         {
1002         case 200:       // Autoauth succeeded, return
1003                 free(buf);
1004                 break;
1005
1006         case 401:       // Untrusted, attempt password authentication
1007                 free(buf);
1008
1009                 sendf(Socket, "USER %s\n", pwd->pw_name);
1010                 printf("Using username %s\n", pwd->pw_name);
1011
1012                 buf = ReadLine(Socket);
1013
1014                 // TODO: Get Salt
1015                 // Expected format: 100 SALT <something> ...
1016                 // OR             : 100 User Set
1017                 RunRegex(&gSaltRegex, buf, 4, matches, "Malformed server response");
1018                 responseCode = atoi(buf);
1019                 if( responseCode != 100 ) {
1020                         fprintf(stderr, "Unknown repsonse code %i from server\n%s\n", responseCode, buf);
1021                         free(buf);
1022                         return -1;      // ERROR
1023                 }
1024
1025                 // Check for salt
1026                 if( memcmp( buf+matches[2].rm_so, "SALT", matches[2].rm_eo - matches[2].rm_so) == 0) {
1027                         // Store it for later
1028                         memcpy( salt, buf + matches[3].rm_so, matches[3].rm_eo - matches[3].rm_so );
1029                         salt[ matches[3].rm_eo - matches[3].rm_so ] = 0;
1030                 }
1031                 free(buf);
1032
1033                 // Give three attempts
1034                 for( i = 0; i < 3; i ++ )
1035                 {
1036                          int    ofs = strlen(pwd->pw_name)+strlen(salt);
1037                         char    tmpBuf[42];
1038                         char    tmp[ofs+20];
1039                         char    *pass = getpass("Password: ");
1040                         uint8_t h[20];
1041
1042                         // Create hash string
1043                         // <username><salt><hash>
1044                         strcpy(tmp, pwd->pw_name);
1045                         strcat(tmp, salt);
1046                         SHA1( (unsigned char*)pass, strlen(pass), h );
1047                         memcpy(tmp+ofs, h, 20);
1048
1049                         // Hash all that
1050                         SHA1( (unsigned char*)tmp, ofs+20, h );
1051                         sprintf(tmpBuf, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
1052                                 h[ 0], h[ 1], h[ 2], h[ 3], h[ 4], h[ 5], h[ 6], h[ 7], h[ 8], h[ 9],
1053                                 h[10], h[11], h[12], h[13], h[14], h[15], h[16], h[17], h[18], h[19]
1054                                 );
1055
1056                         // Send password
1057                         sendf(Socket, "PASS %s\n", tmpBuf);
1058                         buf = ReadLine(Socket);
1059
1060                         responseCode = atoi(buf);
1061                         // Auth OK?
1062                         if( responseCode == 200 )       break;
1063                         // Bad username/password
1064                         if( responseCode == 401 )       continue;
1065
1066                         fprintf(stderr, "Unknown repsonse code %i from server\n%s\n", responseCode, buf);
1067                         free(buf);
1068                         return -1;
1069                 }
1070                 free(buf);
1071                 if( i == 3 )
1072                         return 2;       // 2 = Bad Password
1073                 break;
1074
1075         case 404:       // Bad Username
1076                 fprintf(stderr, "Bad Username '%s'\n", pwd->pw_name);
1077                 free(buf);
1078                 return 1;
1079
1080         default:
1081                 fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1082                 printf("%s\n", buf);
1083                 free(buf);
1084                 return -1;
1085         }
1086
1087         // Set effective user
1088         if( gsEffectiveUser ) {
1089                 sendf(Socket, "SETEUSER %s\n", gsEffectiveUser);
1090
1091                 buf = ReadLine(Socket);
1092                 responseCode = atoi(buf);
1093
1094                 switch(responseCode)
1095                 {
1096                 case 200:
1097                         printf("Running as '%s' by '%s'\n", gsEffectiveUser, pwd->pw_name);
1098                         break;
1099
1100                 case 403:
1101                         printf("Only coke members can use `dispense -u`\n");
1102                         free(buf);
1103                         return -1;
1104
1105                 case 404:
1106                         printf("Invalid user selected\n");
1107                         free(buf);
1108                         return -1;
1109
1110                 default:
1111                         fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1112                         printf("%s\n", buf);
1113                         free(buf);
1114                         exit(-1);
1115                 }
1116
1117                 free(buf);
1118         }
1119
1120         gbIsAuthenticated = 1;
1121
1122         return 0;
1123 }
1124
1125 int GetUserBalance(int Socket)
1126 {
1127         regmatch_t      matches[6];
1128         struct passwd   *pwd;
1129         char    *buf;
1130          int    responseCode;
1131
1132         if( !gsUserName )
1133         {
1134                 if( gsEffectiveUser ) {
1135                         gsUserName = gsEffectiveUser;
1136                 }
1137                 else {
1138                         pwd = getpwuid( getuid() );
1139                         gsUserName = strdup(pwd->pw_name);
1140                 }
1141         }
1142
1143         sendf(Socket, "USER_INFO %s\n", gsUserName);
1144         buf = ReadLine(Socket);
1145         responseCode = atoi(buf);
1146         switch(responseCode)
1147         {
1148         case 202:       break;  // Ok
1149
1150         case 404:
1151                 printf("Invalid user? (USER_INFO failed)\n");
1152                 free(buf);
1153                 return -1;
1154
1155         default:
1156                 fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1157                 printf("%s\n", buf);
1158                 free(buf);
1159                 exit(-1);
1160         }
1161
1162         RunRegex(&gUserInfoRegex, buf, 6, matches, "Malformed server response");
1163
1164         giUserBalance = atoi( buf + matches[4].rm_so );
1165         gsUserFlags = strdup( buf + matches[5].rm_so );
1166
1167         free(buf);
1168
1169         return 0;
1170 }
1171
1172 /**
1173  * \brief Read an item info response from the server
1174  * \param Dest  Destination for the read item (strings will be on the heap)
1175  */
1176 int ReadItemInfo(int Socket, tItem *Dest)
1177 {
1178         char    *buf;
1179          int    responseCode;
1180
1181         regmatch_t      matches[8];
1182         char    *statusStr;
1183
1184         // Get item info
1185         buf = ReadLine(Socket);
1186         responseCode = atoi(buf);
1187
1188         switch(responseCode)
1189         {
1190         case 202:       break;
1191
1192         case 406:
1193                 printf("Bad item name\n");
1194                 free(buf);
1195                 return 1;
1196
1197         default:
1198                 fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n%s", responseCode, buf);
1199                 exit(-1);
1200         }
1201
1202         RunRegex(&gItemRegex, buf, 8, matches, "Malformed server response");
1203
1204         buf[ matches[3].rm_eo ] = '\0';
1205         buf[ matches[5].rm_eo ] = '\0';
1206         buf[ matches[7].rm_eo ] = '\0';
1207
1208         statusStr = &buf[ matches[5].rm_so ];
1209
1210         Dest->ID = atoi( buf + matches[4].rm_so );
1211
1212         if( strcmp(statusStr, "avail") == 0 )
1213                 Dest->Status = 0;
1214         else if( strcmp(statusStr, "sold") == 0 )
1215                 Dest->Status = 1;
1216         else if( strcmp(statusStr, "error") == 0 )
1217                 Dest->Status = -1;
1218         else {
1219                 fprintf(stderr, "Unknown response from dispense server (status '%s')\n",
1220                         statusStr);
1221                 return 1;
1222         }
1223         Dest->Price = atoi( buf + matches[6].rm_so );
1224
1225         // Hack a little to reduce heap fragmentation
1226         {
1227                 char    tmpType[strlen(buf + matches[3].rm_so) + 1];
1228                 char    tmpDesc[strlen(buf + matches[7].rm_so) + 1];
1229                 strcpy(tmpType, buf + matches[3].rm_so);
1230                 strcpy(tmpDesc, buf + matches[7].rm_so);
1231                 free(buf);
1232                 Dest->Type = strdup( tmpType );
1233                 Dest->Desc = strdup( tmpDesc );
1234         }
1235
1236         return 0;
1237 }
1238
1239 /**
1240  * \brief Fill the item information structure
1241  * \return Boolean Failure
1242  */
1243 void PopulateItemList(int Socket)
1244 {
1245         char    *buf;
1246          int    responseCode;
1247
1248         char    *itemType, *itemStart;
1249          int    count, i;
1250         regmatch_t      matches[4];
1251
1252         // Ask server for stock list
1253         send(Socket, "ENUM_ITEMS\n", 11, 0);
1254         buf = ReadLine(Socket);
1255
1256         //printf("Output: %s\n", buf);
1257
1258         responseCode = atoi(buf);
1259         if( responseCode != 201 ) {
1260                 fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n", responseCode);
1261                 exit(-1);
1262         }
1263
1264         // - Get item list -
1265
1266         // Expected format:
1267         //  201 Items <count>
1268         //  202 Item <count>
1269         RunRegex(&gArrayRegex, buf, 4, matches, "Malformed server response");
1270
1271         itemType = &buf[ matches[2].rm_so ];    buf[ matches[2].rm_eo ] = '\0';
1272         count = atoi( &buf[ matches[3].rm_so ] );
1273
1274         // Check array type
1275         if( strcmp(itemType, "Items") != 0 ) {
1276                 // What the?!
1277                 fprintf(stderr, "Unexpected array type, expected 'Items', got '%s'\n",
1278                         itemType);
1279                 exit(-1);
1280         }
1281
1282         itemStart = &buf[ matches[3].rm_eo ];
1283
1284         free(buf);
1285
1286         giNumItems = count;
1287         gaItems = malloc( giNumItems * sizeof(tItem) );
1288
1289         // Fetch item information
1290         for( i = 0; i < giNumItems; i ++ )
1291         {
1292                 ReadItemInfo( Socket, &gaItems[i] );
1293         }
1294
1295         // Read end of list
1296         buf = ReadLine(Socket);
1297         responseCode = atoi(buf);
1298
1299         if( responseCode != 200 ) {
1300                 fprintf(stderr, "Unknown response from dispense server %i\n'%s'",
1301                         responseCode, buf
1302                         );
1303                 exit(-1);
1304         }
1305
1306         free(buf);
1307 }
1308
1309
1310 /**
1311  * \brief Get information on an item
1312  * \return Boolean Failure
1313  */
1314 int Dispense_ItemInfo(int Socket, const char *Type, int ID)
1315 {
1316         tItem   item;
1317
1318         // Query
1319         sendf(Socket, "ITEM_INFO %s:%i\n", Type, ID);
1320
1321         if( ReadItemInfo(Socket, &item) )
1322         {
1323                 return -1;
1324         }
1325
1326         printf("%8s:%-2i %2i.%02i %s\n",
1327                 item.Type, item.ID,
1328                 item.Price/100, item.Price%100,
1329                 item.Desc);
1330
1331         free(item.Type);
1332         free(item.Desc);
1333
1334         return 0;
1335 }
1336
1337 /**
1338  * \brief Dispense an item
1339  * \return Boolean Failure
1340  */
1341 int DispenseItem(int Socket, const char *Type, int ID)
1342 {
1343          int    ret, responseCode;
1344         char    *buf;
1345
1346         // Check for a dry run
1347         if( gbDryRun ) {
1348                 printf("Dry Run - No action\n");
1349                 return 0;
1350         }
1351
1352         // Dispense!
1353         sendf(Socket, "DISPENSE %s:%i\n", Type, ID);
1354         buf = ReadLine(Socket);
1355
1356         responseCode = atoi(buf);
1357         switch( responseCode )
1358         {
1359         case 200:
1360                 printf("Dispense OK\n");
1361                 ret = 0;
1362                 break;
1363         case 401:
1364                 printf("Not authenticated\n");
1365                 ret = 1;
1366                 break;
1367         case 402:
1368                 printf("Insufficient balance\n");
1369                 ret = 1;
1370                 break;
1371         case 406:
1372                 printf("Bad item name\n");
1373                 ret = 1;
1374                 break;
1375         case 500:
1376                 printf("Item failed to dispense, is the slot empty?\n");
1377                 ret = 1;
1378                 break;
1379         case 501:
1380                 printf("Dispense not possible (slot empty/permissions)\n");
1381                 ret = 1;
1382                 break;
1383         default:
1384                 printf("Unknown response code %i ('%s')\n", responseCode, buf);
1385                 ret = -2;
1386                 break;
1387         }
1388
1389         free(buf);
1390         return ret;
1391 }
1392
1393 /**
1394  * \brief Alter a user's balance
1395  */
1396 int Dispense_AlterBalance(int Socket, const char *Username, int Ammount, const char *Reason)
1397 {
1398         char    *buf;
1399          int    responseCode;
1400
1401         // Check for a dry run
1402         if( gbDryRun ) {
1403                 printf("Dry Run - No action\n");
1404                 return 0;
1405         }
1406
1407         sendf(Socket, "ADD %s %i %s\n", Username, Ammount, Reason);
1408         buf = ReadLine(Socket);
1409
1410         responseCode = atoi(buf);
1411         free(buf);
1412
1413         switch(responseCode)
1414         {
1415         case 200:       return 0;       // OK
1416         case 402:
1417                 fprintf(stderr, "Insufficient balance\n");
1418                 return 1;
1419         case 403:       // Not in coke
1420                 fprintf(stderr, "You are not in coke (sucker)\n");
1421                 return 1;
1422         case 404:       // Unknown user
1423                 fprintf(stderr, "Unknown user '%s'\n", Username);
1424                 return 2;
1425         default:
1426                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1427                 return -1;
1428         }
1429
1430         return -1;
1431 }
1432
1433 /**
1434  * \brief Set a user's balance
1435  * \note Only avaliable to dispense admins
1436  */
1437 int Dispense_SetBalance(int Socket, const char *Username, int Balance, const char *Reason)
1438 {
1439         char    *buf;
1440          int    responseCode;
1441
1442         // Check for a dry run
1443         if( gbDryRun ) {
1444                 printf("Dry Run - No action\n");
1445                 return 0;
1446         }
1447
1448         sendf(Socket, "SET %s %i %s\n", Username, Balance, Reason);
1449         buf = ReadLine(Socket);
1450
1451         responseCode = atoi(buf);
1452         free(buf);
1453
1454         switch(responseCode)
1455         {
1456         case 200:       return 0;       // OK
1457         case 403:       // Not in coke
1458                 fprintf(stderr, "You are not an admin\n");
1459                 return 1;
1460         case 404:       // Unknown user
1461                 fprintf(stderr, "Unknown user '%s'\n", Username);
1462                 return 2;
1463         default:
1464                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1465                 return -1;
1466         }
1467
1468         return -1;
1469 }
1470
1471 /**
1472  * \brief Give money to another user
1473  */
1474 int Dispense_Give(int Socket, const char *Username, int Ammount, const char *Reason)
1475 {
1476         char    *buf;
1477          int    responseCode;
1478
1479         if( Ammount < 0 ) {
1480                 printf("Sorry, you can only give, you can't take.\n");
1481                 return -1;
1482         }
1483
1484         // Fast return on zero
1485         if( Ammount == 0 ) {
1486                 printf("Are you actually going to give any?\n");
1487                 return 0;
1488         }
1489
1490         // Check for a dry run
1491         if( gbDryRun ) {
1492                 printf("Dry Run - No action\n");
1493                 return 0;
1494         }
1495
1496         sendf(Socket, "GIVE %s %i %s\n", Username, Ammount, Reason);
1497         buf = ReadLine(Socket);
1498
1499         responseCode = atoi(buf);
1500         free(buf);
1501
1502         switch(responseCode)
1503         {
1504         case 200:       return 0;       // OK
1505
1506         case 402:
1507                 fprintf(stderr, "Insufficient balance\n");
1508                 return 1;
1509
1510         case 404:       // Unknown user
1511                 fprintf(stderr, "Unknown user '%s'\n", Username);
1512                 return 2;
1513
1514         default:
1515                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1516                 return -1;
1517         }
1518
1519         return -1;
1520 }
1521
1522
1523 /**
1524  * \brief Donate money to the club
1525  */
1526 int Dispense_Donate(int Socket, int Ammount, const char *Reason)
1527 {
1528         char    *buf;
1529          int    responseCode;
1530
1531         if( Ammount < 0 ) {
1532                 printf("Sorry, you can only give, you can't take.\n");
1533                 return -1;
1534         }
1535
1536         // Fast return on zero
1537         if( Ammount == 0 ) {
1538                 printf("Are you actually going to give any?\n");
1539                 return 0;
1540         }
1541
1542         // Check for a dry run
1543         if( gbDryRun ) {
1544                 printf("Dry Run - No action\n");
1545                 return 0;
1546         }
1547
1548         sendf(Socket, "DONATE %i %s\n", Ammount, Reason);
1549         buf = ReadLine(Socket);
1550
1551         responseCode = atoi(buf);
1552         free(buf);
1553
1554         switch(responseCode)
1555         {
1556         case 200:       return 0;       // OK
1557
1558         case 402:
1559                 fprintf(stderr, "Insufficient balance\n");
1560                 return 1;
1561
1562         default:
1563                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1564                 return -1;
1565         }
1566
1567         return -1;
1568 }
1569
1570 /**
1571  * \brief Enumerate users
1572  */
1573 int Dispense_EnumUsers(int Socket)
1574 {
1575         char    *buf;
1576          int    responseCode;
1577          int    nUsers;
1578         regmatch_t      matches[4];
1579
1580         if( giMinimumBalance != INT_MIN ) {
1581                 if( giMaximumBalance != INT_MAX ) {
1582                         sendf(Socket, "ENUM_USERS min_balance:%i max_balance:%i\n", giMinimumBalance, giMaximumBalance);
1583                 }
1584                 else {
1585                         sendf(Socket, "ENUM_USERS min_balance:%i\n", giMinimumBalance);
1586                 }
1587         }
1588         else {
1589                 if( giMaximumBalance != INT_MAX ) {
1590                         sendf(Socket, "ENUM_USERS max_balance:%i\n", giMaximumBalance);
1591                 }
1592                 else {
1593                         sendf(Socket, "ENUM_USERS\n");
1594                 }
1595         }
1596         buf = ReadLine(Socket);
1597         responseCode = atoi(buf);
1598
1599         switch(responseCode)
1600         {
1601         case 201:       break;  // Ok, length follows
1602
1603         default:
1604                 fprintf(stderr, "Unknown response code %i\n%s\n", responseCode, buf);
1605                 free(buf);
1606                 return -1;
1607         }
1608
1609         // Get count (not actually used)
1610         RunRegex(&gArrayRegex, buf, 4, matches, "Malformed server response");
1611         nUsers = atoi( buf + matches[3].rm_so );
1612         printf("%i users returned\n", nUsers);
1613
1614         // Free string
1615         free(buf);
1616
1617         // Read returned users
1618         do {
1619                 buf = ReadLine(Socket);
1620                 responseCode = atoi(buf);
1621
1622                 if( responseCode != 202 )       break;
1623
1624                 _PrintUserLine(buf);
1625                 free(buf);
1626         } while(responseCode == 202);
1627
1628         // Check final response
1629         if( responseCode != 200 ) {
1630                 fprintf(stderr, "Unknown response code %i\n%s\n", responseCode, buf);
1631                 free(buf);
1632                 return -1;
1633         }
1634
1635         free(buf);
1636
1637         return 0;
1638 }
1639
1640 int Dispense_ShowUser(int Socket, const char *Username)
1641 {
1642         char    *buf;
1643          int    responseCode, ret;
1644
1645         sendf(Socket, "USER_INFO %s\n", Username);
1646         buf = ReadLine(Socket);
1647
1648         responseCode = atoi(buf);
1649
1650         switch(responseCode)
1651         {
1652         case 202:
1653                 _PrintUserLine(buf);
1654                 ret = 0;
1655                 break;
1656
1657         case 404:
1658                 printf("Unknown user '%s'\n", Username);
1659                 ret = 1;
1660                 break;
1661
1662         default:
1663                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
1664                 ret = -1;
1665                 break;
1666         }
1667
1668         free(buf);
1669
1670         return ret;
1671 }
1672
1673 void _PrintUserLine(const char *Line)
1674 {
1675         regmatch_t      matches[6];
1676          int    bal;
1677
1678         RunRegex(&gUserInfoRegex, Line, 6, matches, "Malformed server response");
1679         // 3: Username
1680         // 4: Balance
1681         // 5: Flags
1682         {
1683                  int    usernameLen = matches[3].rm_eo - matches[3].rm_so;
1684                 char    username[usernameLen + 1];
1685                  int    flagsLen = matches[5].rm_eo - matches[5].rm_so;
1686                 char    flags[flagsLen + 1];
1687
1688                 memcpy(username, Line + matches[3].rm_so, usernameLen);
1689                 username[usernameLen] = '\0';
1690                 memcpy(flags, Line + matches[5].rm_so, flagsLen);
1691                 flags[flagsLen] = '\0';
1692
1693                 bal = atoi(Line + matches[4].rm_so);
1694                 printf("%-15s: $%4i.%02i (%s)\n", username, bal/100, abs(bal)%100, flags);
1695         }
1696 }
1697
1698 int Dispense_AddUser(int Socket, const char *Username)
1699 {
1700         char    *buf;
1701          int    responseCode, ret;
1702
1703         // Check for a dry run
1704         if( gbDryRun ) {
1705                 printf("Dry Run - No action\n");
1706                 return 0;
1707         }
1708
1709         sendf(Socket, "USER_ADD %s\n", Username);
1710
1711         buf = ReadLine(Socket);
1712         responseCode = atoi(buf);
1713
1714         switch(responseCode)
1715         {
1716         case 200:
1717                 printf("User '%s' added\n", Username);
1718                 ret = 0;
1719                 break;
1720
1721         case 403:
1722                 printf("Only wheel can add users\n");
1723                 ret = 1;
1724                 break;
1725
1726         case 404:
1727                 printf("User '%s' already exists\n", Username);
1728                 ret = 0;
1729                 break;
1730
1731         default:
1732                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
1733                 ret = -1;
1734                 break;
1735         }
1736
1737         free(buf);
1738
1739         return ret;
1740 }
1741
1742 int Dispense_SetUserType(int Socket, const char *Username, const char *TypeString)
1743 {
1744         char    *buf;
1745          int    responseCode, ret;
1746
1747         // Check for a dry run
1748         if( gbDryRun ) {
1749                 printf("Dry Run - No action\n");
1750                 return 0;
1751         }
1752
1753         // TODO: Pre-validate the string
1754
1755         sendf(Socket, "USER_FLAGS %s %s\n", Username, TypeString);
1756
1757         buf = ReadLine(Socket);
1758         responseCode = atoi(buf);
1759
1760         switch(responseCode)
1761         {
1762         case 200:
1763                 printf("User '%s' updated\n", Username);
1764                 ret = 0;
1765                 break;
1766
1767         case 403:
1768                 printf("Only wheel can modify users\n");
1769                 ret = 1;
1770                 break;
1771
1772         case 404:
1773                 printf("User '%s' does not exist\n", Username);
1774                 ret = 0;
1775                 break;
1776
1777         case 407:
1778                 printf("Flag string is invalid\n");
1779                 ret = 0;
1780                 break;
1781
1782         default:
1783                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
1784                 ret = -1;
1785                 break;
1786         }
1787
1788         free(buf);
1789
1790         return ret;
1791 }
1792
1793 // ---------------
1794 // --- Helpers ---
1795 // ---------------
1796 char *ReadLine(int Socket)
1797 {
1798         static char     buf[BUFSIZ];
1799         static int      bufPos = 0;
1800         static int      bufValid = 0;
1801          int    len;
1802         char    *newline = NULL;
1803          int    retLen = 0;
1804         char    *ret = malloc(10);
1805
1806         #if DEBUG_TRACE_SERVER
1807         printf("ReadLine: ");
1808         #endif
1809         fflush(stdout);
1810
1811         ret[0] = '\0';
1812
1813         while( !newline )
1814         {
1815                 if( bufValid ) {
1816                         len = bufValid;
1817                 }
1818                 else {
1819                         len = recv(Socket, buf+bufPos, BUFSIZ-1-bufPos, 0);
1820                         buf[bufPos+len] = '\0';
1821                 }
1822
1823                 newline = strchr( buf+bufPos, '\n' );
1824                 if( newline ) {
1825                         *newline = '\0';
1826                 }
1827
1828                 retLen += strlen(buf+bufPos);
1829                 ret = realloc(ret, retLen + 1);
1830                 strcat( ret, buf+bufPos );
1831
1832                 if( newline ) {
1833                          int    newLen = newline - (buf+bufPos) + 1;
1834                         bufValid = len - newLen;
1835                         bufPos += newLen;
1836                 }
1837                 if( len + bufPos == BUFSIZ - 1 )        bufPos = 0;
1838         }
1839
1840         #if DEBUG_TRACE_SERVER
1841         printf("%i '%s'\n", retLen, ret);
1842         #endif
1843
1844         return ret;
1845 }
1846
1847 int sendf(int Socket, const char *Format, ...)
1848 {
1849         va_list args;
1850          int    len;
1851
1852         va_start(args, Format);
1853         len = vsnprintf(NULL, 0, Format, args);
1854         va_end(args);
1855
1856         {
1857                 char    buf[len+1];
1858                 va_start(args, Format);
1859                 vsnprintf(buf, len+1, Format, args);
1860                 va_end(args);
1861
1862                 #if DEBUG_TRACE_SERVER
1863                 printf("sendf: %s", buf);
1864                 #endif
1865
1866                 return send(Socket, buf, len, 0);
1867         }
1868 }
1869
1870 char *trim(char *string)
1871 {
1872          int    i;
1873
1874         while( isspace(*string) )
1875                 string ++;
1876
1877         for( i = strlen(string); i--; )
1878         {
1879                 if( isspace(string[i]) )
1880                         string[i] = '\0';
1881                 else
1882                         break;
1883         }
1884
1885         return string;
1886 }
1887
1888 int RunRegex(regex_t *regex, const char *string, int nMatches, regmatch_t *matches, const char *errorMessage)
1889 {
1890          int    ret;
1891
1892         ret = regexec(regex, string, nMatches, matches, 0);
1893         if( ret && errorMessage ) {
1894                 size_t  len = regerror(ret, regex, NULL, 0);
1895                 char    errorStr[len];
1896                 regerror(ret, regex, errorStr, len);
1897                 printf("string = '%s'\n", string);
1898                 fprintf(stderr, "%s\n%s", errorMessage, errorStr);
1899                 exit(-1);
1900         }
1901
1902         return ret;
1903 }
1904
1905 void CompileRegex(regex_t *regex, const char *pattern, int flags)
1906 {
1907          int    ret = regcomp(regex, pattern, flags);
1908         if( ret ) {
1909                 size_t  len = regerror(ret, regex, NULL, 0);
1910                 char    errorStr[len];
1911                 regerror(ret, regex, errorStr, len);
1912                 fprintf(stderr, "Regex compilation failed - %s\n", errorStr);
1913                 exit(-1);
1914         }
1915 }