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