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 #define MAX_TXT_ARGS    5       // Maximum number of textual arguments (including command)
  33 #define DISPENSE_MULTIPLE_MAX   20      // Maximum argument to -c
  34
  35 enum eUI_Modes
  36 {
  37         UI_MODE_BASIC,  // Non-NCurses
  38         UI_MODE_STANDARD,
  39         UI_MODE_DRINKSONLY,
  40         UI_MODE_ALL,
  41         NUM_UI_MODES
  42 };
  43
  44 enum eReturnValues
  45 {
  46         RV_SUCCESS,
  47         RV_BAD_ITEM,
  48         RV_INVALID_USER,
  49         RV_PERMISSIONS,
  50         RV_ARGUMENTS,
  51         RV_BALANCE,
  52         RV_SERVER_ERROR,        // Generic for 5xx codes
  53         RV_UNKNOWN_ERROR = -1,
  54         RV_SOCKET_ERROR = -2,
  55         RV_UNKNOWN_RESPONSE = -3,
  56 };
  57
  58 // === TYPES ===
  59 typedef struct sItem {
  60         char    *Type;
  61          int    ID;
  62          int    Status; // 0: Availiable, 1: Sold out, -1: Error
  63         char    *Desc;
  64          int    Price;
  65 }       tItem;
  66
  67 // === PROTOTYPES ===
  68 void    ShowUsage(void);
  69  int    main(int argc, char *argv[]);
  70 // --- GUI ---
  71  int    ShowNCursesUI(void);
  72  int    ShowItemAt(int Row, int Col, int Width, int Index, int bHilighted);
  73 void    PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1, const char *Mid, char Pad2, const char *Right, ...);
  74 // --- Coke Server Communication ---
  75  int    OpenConnection(const char *Host, int Port);
  76  int    Authenticate(int Socket);
  77  int    GetUserBalance(int Socket);
  78 void    PopulateItemList(int Socket);
  79  int    Dispense_ItemInfo(int Socket, const char *Type, int ID);
  80  int    DispenseItem(int Socket, const char *Type, int ID);
  81  int    Dispense_AlterBalance(int Socket, const char *Username, int Ammount, const char *Reason);
  82  int    Dispense_SetBalance(int Socket, const char *Username, int Balance, const char *Reason);
  83  int    Dispense_Give(int Socket, const char *Username, int Ammount, const char *Reason);
  84  int    Dispense_Refund(int Socket, const char *Username, const char *Item, int PriceOverride);
  85  int    Dispense_Donate(int Socket, int Ammount, const char *Reason);
  86  int    Dispense_EnumUsers(int Socket);
  87  int    Dispense_ShowUser(int Socket, const char *Username);
  88 void    _PrintUserLine(const char *Line);
  89  int    Dispense_AddUser(int Socket, const char *Username);
  90  int    Dispense_SetUserType(int Socket, const char *Username, const char *TypeString, const char *Reason);
  91  int    Dispense_SetItem(int Socket, const char *Type, int ID, int NewPrice, const char *NewName);
  92 // --- Helpers ---
  93 char    *ReadLine(int Socket);
  94  int    sendf(int Socket, const char *Format, ...);
  95 char    *trim(char *string);
  96  int    RunRegex(regex_t *regex, const char *string, int nMatches, regmatch_t *matches, const char *errorMessage);
  97 void    CompileRegex(regex_t *regex, const char *pattern, int flags);
  98
  99 // === GLOBALS ===
 100 char    *gsDispenseServer = "merlo.ucc.gu.uwa.edu.au";
 101  int    giDispensePort = 11020;
 102
 103 tItem   *gaItems;
 104  int    giNumItems;
 105 regex_t gArrayRegex, gItemRegex, gSaltRegex, gUserInfoRegex, gUserItemIdentRegex;
 106  int    gbIsAuthenticated = 0;
 107
 108 char    *gsItemPattern; //!< Item pattern
 109 char    *gsEffectiveUser;       //!< '-u' Dispense as another user
 110
 111  int    giUIMode = UI_MODE_STANDARD;
 112  int    gbDryRun = 0;   //!< '-n' Read-only
 113  int    gbDisallowSelectWithoutBalance = 1;     //!< Don't allow items to be hilighted if not affordable
 114
 115  int    giMinimumBalance = INT_MIN;     //!< '-m' Minumum balance for `dispense acct`
 116  int    giMaximumBalance = INT_MAX;     //!< '-M' Maximum balance for `dispense acct`
 117
 118  char   *gsUserName;    //!< User that dispense will happen as
 119 char    *gsUserFlags;   //!< User's flag set
 120  int    giUserBalance = -1;     //!< User balance (set by Authenticate)
 121  int    giDispenseCount = 1;    //!< Number of dispenses to do
 122
 123 char    *gsTextArgs[MAX_TXT_ARGS];
 124  int    giTextArgc;
 125
 126 // === CODE ===
 127 void ShowUsage(void)
 128 {
 129         printf( "Usage:\n" );
 130         if( giTextArgc == 0 )
 131                 printf(
 132                         "  == Everyone ==\n"
 133                         "    dispense\n"
 134                         "        Show interactive list\n"
 135                         "    dispense <name>|<index>|<itemid>\n"
 136                         "        Dispense named item (<name> matches if it is a unique prefix)\n"
 137                         "    dispense finger\n"
 138                         "        Show the finger output\n"
 139                         );
 140         if( giTextArgc == 0 || strcmp(gsTextArgs[0], "give") == 0 )
 141                 printf(
 142                         "    dispense give <user> <amount> \"<reason>\"\n"
 143                         "        Give money to another user\n"
 144                         );
 145
 146         if( giTextArgc == 0 || strcmp(gsTextArgs[0], "donate") == 0 )
 147                 printf(
 148                         "    dispense donate <amount> \"<reason>\"\n"
 149                         "        Donate to the club\n"
 150                         );
 151         if( giTextArgc == 0 || strcmp(gsTextArgs[0], "iteminfo") == 0 )
 152                 printf(
 153                         "    dispense iteminfo <itemid>\n"
 154                         "        Get the name and price for an item\n"
 155                         );
 156 //      if( giTextArgc == 0 || strcmp(gsTextArgs[0], "enumitems") == 0 )
 157 //              printf(
 158 //                      "    dispense enumitems\n"
 159 //                      "        List avaliable items\n"
 160 //                      );
 161         if( giTextArgc == 0 )
 162                 printf("  == Coke members == \n");
 163         if( giTextArgc == 0 || strcmp(gsTextArgs[0], "acct") == 0 )
 164                 printf(
 165                         "    dispense acct [<user>]\n"
 166                         "        Show user balances\n"
 167                         "    dispense acct <user> [+-]<amount> \"<reason>\"\n"
 168                         "        Alter a account value\n"
 169                         "    dispense acct <user> =<amount> \"<reason>\"\n"
 170                         "        Set an account balance\n"
 171                         );
 172         if( giTextArgc == 0 || strcmp(gsTextArgs[0], "refund") == 0 )
 173                 printf(
 174                         "    dispense refund <user> <itemid> [<price>]\n"
 175                         "        Refund an item to a user (with optional price override)\n"
 176                         "        Item IDs can be seen in the cokelog (in the brackets after the item name)\n"
 177                         "        e.g. coke:6 for a coke, snack:33 for slot 33 of the snack machine\n"
 178                         );
 179         if( giTextArgc == 0 || strcmp(gsTextArgs[0], "slot") == 0 )
 180                 printf(
 181                         "    dispense slot <itemid> <price> <name>\n"
 182                         "        Rename/Re-price a slot\n"
 183                         );
 184         if( giTextArgc == 0 )
 185                 printf("  == Dispense administrators ==\n");
 186         if( giTextArgc == 0 || strcmp(gsTextArgs[0], "user") == 0 )
 187                 printf(
 188                         "    dispense user add <user>\n"
 189                         "        Create new account\n"
 190                         "    dispense user type <user> <flags> <reason>\n"
 191                         "        Alter a user's flags\n"
 192                         "        <flags> is a comma-separated list of user, coke, admin, internal or disabled\n"
 193                         "        Flags are removed by preceding the name with '-' or '!'\n"
 194                         );
 195         if( giTextArgc == 0 )
 196                 printf( "\n"
 197                         "General Options:\n"
 198                         "    -c <count>\n"
 199                         "        Dispense multiple times\n"
 200                         "    -u <username>\n"
 201                         "        Set a different user (Coke members only)\n"
 202                         "    -h / -?\n"
 203                         "        Show help text\n"
 204                         "    -G\n"
 205                         "        Use simple textual interface (instead of ncurses)\n"
 206                         "    -n\n"
 207                         "        Dry run - Do not actually do dispenses\n"
 208                         "    -m <min balance>\n"
 209                         "    -M <max balance>\n"
 210                         "        Set the Maximum/Minimum balances shown in `dispense acct`\n"
 211                         "Definitions:\n"
 212                         "    <itemid>\n"
 213                         "        Item ID of the form <type>:<num> where <type> is a non-empty string of alpha-numeric characters, and <num> is a non-negative integer\n"
 214 //                      "    <user>\n"
 215 //                      "        Account name\n"
 216                         );
 217 }
 218
 219 int main(int argc, char *argv[])
 220 {
 221          int    sock;
 222          int    i, ret = 0;
 223         char    buffer[BUFSIZ];
 224
 225         gsTextArgs[0] = "";
 226
 227         // -- Create regular expressions
 228         // > Code Type Count ...
 229         CompileRegex(&gArrayRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([0-9]+)", REG_EXTENDED);     //
 230         // > Code Type Ident Status Price Desc
 231         CompileRegex(&gItemRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([A-Za-z]+):([0-9]+)\\s+(avail|sold|error)\\s+([0-9]+)\\s+(.+)$", REG_EXTENDED);
 232         // > Code 'SALT' salt
 233         CompileRegex(&gSaltRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+(.+)$", REG_EXTENDED);
 234         // > Code 'User' Username Balance Flags
 235         CompileRegex(&gUserInfoRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([^ ]+)\\s+(-?[0-9]+)\\s+(.+)$", REG_EXTENDED);
 236         // > Item Ident
 237         CompileRegex(&gUserItemIdentRegex, "^([A-Za-z]+):([0-9]+)$", REG_EXTENDED);
 238
 239         // Parse Arguments
 240         for( i = 1; i < argc; i ++ )
 241         {
 242                 char    *arg = argv[i];
 243
 244                 if( arg[0] == '-' )
 245                 {
 246                         switch(arg[1])
 247                         {
 248                         case 'h':
 249                         case '?':
 250                                 ShowUsage();
 251                                 return 0;
 252
 253                         case 'c':
 254                                 if( i + 1 >= argc ) {
 255                                         fprintf(stderr, "%s: -c takes an argument\n", argv[0]);
 256                                         ShowUsage();
 257                                         return -1;
 258                                 }
 259                                 giDispenseCount = atoi(argv[++i]);
 260                                 if( giDispenseCount < 1 || giDispenseCount > DISPENSE_MULTIPLE_MAX ) {
 261                                         fprintf(stderr, "Sorry, only 1-20 can be passed to -c (safety)\n");
 262                                         return -1;
 263                                 }
 264
 265                                 break ;
 266
 267                         case 'm':       // Minimum balance
 268                                 if( i + 1 >= argc ) {
 269                                         fprintf(stderr, "%s: -m takes an argument\n", argv[0]);
 270                                         ShowUsage();
 271                                         return RV_ARGUMENTS;
 272                                 }
 273                                 giMinimumBalance = atoi(argv[++i]);
 274                                 break;
 275                         case 'M':       // Maximum balance
 276                                 if( i + 1 >= argc ) {
 277                                         fprintf(stderr, "%s: -M takes an argument\n", argv[0]);
 278                                         ShowUsage();
 279                                         return RV_ARGUMENTS;
 280                                 }
 281                                 giMaximumBalance = atoi(argv[++i]);
 282                                 break;
 283
 284                         case 'u':       // Override User
 285                                 if( i + 1 >= argc ) {
 286                                         fprintf(stderr, "%s: -u takes an argument\n", argv[0]);
 287                                         ShowUsage();
 288                                         return RV_ARGUMENTS;
 289                                 }
 290                                 gsEffectiveUser = argv[++i];
 291                                 break;
 292
 293                         case 'H':       // Override remote host
 294                                 if( i + 1 >= argc ) {
 295                                         fprintf(stderr, "%s: -H takes an argument\n", argv[0]);
 296                                         ShowUsage();
 297                                         return RV_ARGUMENTS;
 298                                 }
 299                                 gsDispenseServer = argv[++i];
 300                                 break;
 301                         case 'P':       // Override remote port
 302                                 if( i + 1 >= argc ) {
 303                                         fprintf(stderr, "%s: -P takes an argument\n", argv[0]);
 304                                         ShowUsage();
 305                                         return RV_ARGUMENTS;
 306                                 }
 307                                 giDispensePort = atoi(argv[++i]);
 308                                 break;
 309
 310                         // Set slot name/price
 311                         case 's':
 312                                 if( giTextArgc != 0 ) {
 313                                         fprintf(stderr, "%s: -s must appear before other arguments\n", argv[0]);
 314                                         ShowUsage();
 315                                         return RV_ARGUMENTS;
 316                                 }
 317                                 gsTextArgs[0] = "slot"; // HACK!!
 318                                 giTextArgc ++;
 319                                 break;
 320
 321                         case 'G':       // Don't use GUI
 322                                 giUIMode = UI_MODE_BASIC;
 323                                 break;
 324                         case 'D':       // Drinks only
 325                                 giUIMode = UI_MODE_DRINKSONLY;
 326                                 break;
 327                         case 'n':       // Dry Run / read-only
 328                                 gbDryRun = 1;
 329                                 break;
 330                         case '-':
 331                                 if( strcmp(argv[i], "--help") == 0 ) {
 332                                         ShowUsage();
 333                                         return 0;
 334                                 }
 335                                 else if( strcmp(argv[i], "--dry-run") == 0 ) {
 336                                         gbDryRun = 1;
 337                                 }
 338                                 else if( strcmp(argv[i], "--drinks-only") == 0 ) {
 339                                         giUIMode = UI_MODE_DRINKSONLY;
 340                                 }
 341                                 else if( strcmp(argv[i], "--can-select-all") == 0 ) {
 342                                         gbDisallowSelectWithoutBalance = 0;
 343                                 }
 344                                 else {
 345                                         fprintf(stderr, "%s: Unknown switch '%s'\n", argv[0], argv[i]);
 346                                         ShowUsage();
 347                                         return RV_ARGUMENTS;
 348                                 }
 349                                 break;
 350                         default:
 351                                 // The first argument is not allowed to begin with 'i'
 352                                 // (catches most bad flags)
 353                                 if( giTextArgc == 0 ) {
 354                                         fprintf(stderr, "%s: Unknown switch '%s'\n", argv[0], argv[i]);
 355                                         ShowUsage();
 356                                         return RV_ARGUMENTS;
 357                                 }
 358                                 if( giTextArgc == MAX_TXT_ARGS )
 359                                 {
 360                                         fprintf(stderr, "ERROR: Too many arguments\n");
 361                                         return RV_ARGUMENTS;
 362                                 }
 363                                 gsTextArgs[giTextArgc++] = argv[i];
 364                                 break;
 365                         }
 366
 367                         continue;
 368                 }
 369
 370                 if( giTextArgc == MAX_TXT_ARGS )
 371                 {
 372                         fprintf(stderr, "ERROR: Too many arguments\n");
 373                         return RV_ARGUMENTS;
 374                 }
 375
 376                 gsTextArgs[giTextArgc++] = argv[i];
 377
 378         }
 379
 380         //
 381         // `dispense finger`
 382         // -
 383         if( strcmp(gsTextArgs[0], "finger") == 0 )
 384         {
 385                 // Connect to server
 386                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 387                 if( sock < 0 )  return RV_SOCKET_ERROR;
 388
 389                 // Get items
 390                 PopulateItemList(sock);
 391
 392                 printf("The UCC Coke machine.\n\n");
 393
 394                 // Only get coke slot statuses
 395                 for( i = 0; i <= 6; i ++ )
 396                 {
 397                         const char *status;
 398                         switch(gaItems[i].Status)
 399                         {
 400                         case 0: status = "Avail";       break;
 401                         case 1: status = "Sold ";       break;
 402                         default:
 403                                 status = "Error";
 404                                 break;
 405                         }
 406                         printf("%i - %s %3i %s\n", gaItems[i].ID, status, gaItems[i].Price, gaItems[i].Desc);
 407
 408                 }
 409
 410                 printf("\nMay your pink fish bing into the distance.\n");
 411
 412                 return 0;
 413         }
 414
 415         //
 416         // `dispense acct`
 417         // -
 418         if( strcmp(gsTextArgs[0], "acct") == 0 )
 419         {
 420                 // Connect to server
 421                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 422                 if( sock < 0 )  return RV_SOCKET_ERROR;
 423                 // List accounts?
 424                 if( giTextArgc == 1 ) {
 425                         ret = Dispense_EnumUsers(sock);
 426                         close(sock);
 427                         return ret;
 428                 }
 429
 430                 // gsTextArgs[1]: Username
 431
 432                 // Alter account?
 433                 if( giTextArgc != 2 )
 434                 {
 435                         if( giTextArgc != 4 ) {
 436                                 fprintf(stderr, "`dispense acct` requires a reason\n");
 437                                 ShowUsage();
 438                                 return RV_ARGUMENTS;
 439                         }
 440
 441                         // Authentication required
 442                         ret = Authenticate(sock);
 443                         if(ret) return ret;
 444
 445                         // gsTextArgs[1]: Username
 446                         // gsTextArgs[2]: Ammount
 447                         // gsTextArgs[3]: Reason
 448
 449                         if( gsTextArgs[2][0] == '=' ) {
 450                                 // Set balance
 451                                 if( gsTextArgs[2][1] != '0' && atoi(gsTextArgs[2]+1) == 0 ) {
 452                                         fprintf(stderr, "Error: Invalid balance to be set\n");
 453                                         exit(1);
 454                                 }
 455
 456                                 ret = Dispense_SetBalance(sock, gsTextArgs[1], atoi(gsTextArgs[2]+1), gsTextArgs[3]);
 457                         }
 458                         else {
 459                                 // Alter balance
 460                                 ret = Dispense_AlterBalance(sock, gsTextArgs[1], atoi(gsTextArgs[2]), gsTextArgs[3]);
 461                         }
 462                 }
 463                 // On error, quit
 464                 if( ret ) {
 465                         close(sock);
 466                         return ret;
 467                 }
 468
 469                 // Show user information
 470                 ret = Dispense_ShowUser(sock, gsTextArgs[1]);
 471
 472                 close(sock);
 473                 return ret;
 474         }
 475         //
 476         // `dispense give`
 477         // - "Here, have some money."
 478         else if( strcmp(gsTextArgs[0], "give") == 0 )
 479         {
 480                 if( giTextArgc != 4 ) {
 481                         fprintf(stderr, "`dispense give` takes three arguments\n");
 482                         ShowUsage();
 483                         return RV_ARGUMENTS;
 484                 }
 485
 486                 // gsTextArgs[1]: Destination
 487                 // gsTextArgs[2]: Ammount
 488                 // gsTextArgs[3]: Reason
 489
 490                 // Connect to server
 491                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 492                 if( sock < 0 )  return RV_SOCKET_ERROR;
 493
 494                 // Authenticate
 495                 ret = Authenticate(sock);
 496                 if(ret) return ret;
 497
 498                 ret = Dispense_Give(sock, gsTextArgs[1], atoi(gsTextArgs[2]), gsTextArgs[3]);
 499
 500                 close(sock);
 501
 502                 return ret;
 503         }
 504         //
 505         // `dispense user`
 506         // - User administration (Admin Only)
 507         if( strcmp(gsTextArgs[0], "user") == 0 )
 508         {
 509                 // Check argument count
 510                 if( giTextArgc == 1 ) {
 511                         fprintf(stderr, "Error: `dispense user` requires arguments\n");
 512                         ShowUsage();
 513                         return RV_ARGUMENTS;
 514                 }
 515
 516                 // Connect to server
 517                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 518                 if( sock < 0 )  return RV_SOCKET_ERROR;
 519
 520                 // Attempt authentication
 521                 ret = Authenticate(sock);
 522                 if(ret) return ret;
 523
 524                 // Add new user?
 525                 if( strcmp(gsTextArgs[1], "add") == 0 )
 526                 {
 527                         if( giTextArgc != 3 ) {
 528                                 fprintf(stderr, "Error: `dispense user add` requires an argument\n");
 529                                 ShowUsage();
 530                                 return RV_ARGUMENTS;
 531                         }
 532
 533                         ret = Dispense_AddUser(sock, gsTextArgs[2]);
 534                 }
 535                 // Update a user
 536                 else if( strcmp(gsTextArgs[1], "type") == 0 || strcmp(gsTextArgs[1], "flags") == 0 )
 537                 {
 538                         if( giTextArgc < 4 || giTextArgc > 5 ) {
 539                                 fprintf(stderr, "Error: `dispense user type` requires two arguments\n");
 540                                 ShowUsage();
 541                                 return RV_ARGUMENTS;
 542                         }
 543
 544                         if( giTextArgc == 4 )
 545                                 ret = Dispense_SetUserType(sock, gsTextArgs[2], gsTextArgs[3], "");
 546                         else
 547                                 ret = Dispense_SetUserType(sock, gsTextArgs[2], gsTextArgs[3], gsTextArgs[4]);
 548                 }
 549                 else
 550                 {
 551                         fprintf(stderr, "Error: Unknown sub-command for `dispense user`\n");
 552                         ShowUsage();
 553                         return RV_ARGUMENTS;
 554                 }
 555                 close(sock);
 556                 return ret;
 557         }
 558         // Donation!
 559         else if( strcmp(gsTextArgs[0], "donate") == 0 )
 560         {
 561                 // Check argument count
 562                 if( giTextArgc != 3 ) {
 563                         fprintf(stderr, "Error: `dispense donate` requires two arguments\n");
 564                         ShowUsage();
 565                         return RV_ARGUMENTS;
 566                 }
 567
 568                 // Connect to server
 569                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 570                 if( sock < 0 )  return RV_SOCKET_ERROR;
 571
 572                 // Attempt authentication
 573                 ret = Authenticate(sock);
 574                 if(ret) return ret;
 575
 576                 // Do donation
 577                 ret = Dispense_Donate(sock, atoi(gsTextArgs[1]), gsTextArgs[2]);
 578
 579                 close(sock);
 580
 581                 return ret;
 582         }
 583         // Refund an item
 584         else if( strcmp(gsTextArgs[0], "refund") == 0 )
 585         {
 586                  int     price = 0;
 587                 // Check argument count
 588                 if( giTextArgc != 3 && giTextArgc != 4 ) {
 589                         fprintf(stderr, "Error: `dispense refund` takes 2 or 3 arguments\n");
 590                         ShowUsage();
 591                         return RV_ARGUMENTS;
 592                 }
 593
 594                 // Connect to server
 595                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 596                 if(sock < 0)    return RV_SOCKET_ERROR;
 597
 598                 // Attempt authentication
 599                 ret = Authenticate(sock);
 600                 if(ret) return ret;
 601
 602                 if( giTextArgc == 4 ) {
 603                         price = atoi(gsTextArgs[3]);
 604                         if( price <= 0 ) {
 605                                 fprintf(stderr, "Error: Override price is invalid (should be > 0)\n");
 606                                 return RV_ARGUMENTS;
 607                         }
 608                 }
 609
 610                 // Username, Item, cost
 611                 ret = Dispense_Refund(sock, gsTextArgs[1], gsTextArgs[2], price);
 612
 613                 // TODO: More
 614                 close(sock);
 615                 return ret;
 616         }
 617         // Query an item price
 618         else if( strcmp(gsTextArgs[0], "iteminfo") == 0 )
 619         {
 620                 regmatch_t matches[3];
 621                 char    *type;
 622                  int    id;
 623                 // Check argument count
 624                 if( giTextArgc != 2 ) {
 625                         fprintf(stderr, "Error: `dispense iteminfo` requires an argument\n");
 626                         ShowUsage();
 627                         return RV_ARGUMENTS;
 628                 }
 629                 // Parse item ID
 630                 if( RunRegex(&gUserItemIdentRegex, gsTextArgs[1], 3, matches, NULL) != 0 ) {
 631                         fprintf(stderr, "Error: Invalid item ID passed (<type>:<id> expected)\n");
 632                         return RV_ARGUMENTS;
 633                 }
 634                 type = gsTextArgs[1] + matches[1].rm_so;
 635                 gsTextArgs[1][ matches[1].rm_eo ] = '\0';
 636                 id = atoi( gsTextArgs[1] + matches[2].rm_so );
 637
 638                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 639                 if( sock < 0 )  return RV_SOCKET_ERROR;
 640
 641                 ret = Dispense_ItemInfo(sock, type, id);
 642                 close(sock);
 643                 return ret;
 644         }
 645         // Set slot
 646         else if( strcmp(gsTextArgs[0], "slot") == 0 )
 647         {
 648                 regmatch_t matches[3];
 649                 char    *item_type, *newname;
 650                  int    item_id, price;
 651
 652                 // Check arguments
 653                 if( giTextArgc != 4 ) {
 654                         fprintf(stderr, "Error: `dispense slot` takes three arguments\n");
 655                         ShowUsage();
 656                         return RV_ARGUMENTS;
 657                 }
 658
 659                 // Parse arguments
 660                 if( RunRegex(&gUserItemIdentRegex, gsTextArgs[1], 3, matches, NULL) != 0 ) {
 661                         fprintf(stderr, "Error: Invalid item ID passed (<type>:<id> expected)\n");
 662                         return RV_ARGUMENTS;
 663                 }
 664                 item_type = gsTextArgs[1] + matches[1].rm_so;
 665                 gsTextArgs[1][ matches[1].rm_eo ] = '\0';
 666                 item_id = atoi( gsTextArgs[1] + matches[2].rm_so );
 667
 668                 // - Price
 669                 price = atoi( gsTextArgs[2] );
 670                 if( price <= 0 && gsTextArgs[2][0] != '0' ) {
 671                         fprintf(stderr, "Error: Invalid price passed (must be >= 0)\n");
 672                         return RV_ARGUMENTS;
 673                 }
 674
 675                 // - New name
 676                 newname = gsTextArgs[3];
 677                 // -- Sanity
 678                 {
 679                         char *pos;
 680                         for( pos = newname; *pos; pos ++ )
 681                         {
 682                                 if( !isalnum(*pos) && *pos != ' ' ) {
 683                                         fprintf(stderr, "Error: You should only have letters, numbers and spaces in an item name\n");
 684                                         return RV_ARGUMENTS;
 685                                 }
 686                         }
 687                 }
 688
 689                 // Connect & Authenticate
 690                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 691                 if( sock < 0 )  return RV_SOCKET_ERROR;
 692                 ret = Authenticate(sock);
 693                 if(ret) return ret;
 694                 // Update the slot
 695                 ret = Dispense_SetItem(sock, item_type, item_id, price, newname);
 696
 697                 close(sock);
 698                 return ret;
 699         }
 700         // Item name / pattern
 701         else
 702         {
 703                 gsItemPattern = gsTextArgs[0];
 704         }
 705
 706         // Connect to server
 707         sock = OpenConnection(gsDispenseServer, giDispensePort);
 708         if( sock < 0 )  return RV_SOCKET_ERROR;
 709
 710         // Get the user's balance
 711         ret = GetUserBalance(sock);
 712         if(ret) return ret;
 713
 714         // Get items
 715         PopulateItemList(sock);
 716
 717         // Disconnect from server
 718         close(sock);
 719
 720         if( gsItemPattern && gsItemPattern[0] )
 721         {
 722                 regmatch_t matches[3];
 723                 // Door (hard coded)
 724                 if( strcmp(gsItemPattern, "door") == 0 )
 725                 {
 726                         // Connect, Authenticate, dispense and close
 727                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 728                         if( sock < 0 )  return RV_SOCKET_ERROR;
 729                         ret = Authenticate(sock);
 730                         if(ret) return ret;
 731                         ret = DispenseItem(sock, "door", 0);
 732                         close(sock);
 733                         return ret;
 734                 }
 735                 // Item id (<type>:<num>)
 736                 else if( RunRegex(&gUserItemIdentRegex, gsItemPattern, 3, matches, NULL) == 0 )
 737                 {
 738                         char    *ident;
 739                          int    id;
 740
 741                         // Get and finish ident
 742                         ident = gsItemPattern + matches[1].rm_so;
 743                         gsItemPattern[matches[1].rm_eo] = '\0';
 744                         // Get ID
 745                         id = atoi( gsItemPattern + matches[2].rm_so );
 746
 747                         // Connect, Authenticate, dispense and close
 748                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 749                         if( sock < 0 )  return RV_SOCKET_ERROR;
 750
 751                         Dispense_ItemInfo(sock, ident, id);
 752
 753                         ret = Authenticate(sock);
 754                         if(ret) return ret;
 755                         ret = DispenseItem(sock, ident, id);
 756                         close(sock);
 757                         return ret;
 758                 }
 759                 // Item number (6 = coke)
 760                 else if( strcmp(gsItemPattern, "0") == 0 || atoi(gsItemPattern) > 0 )
 761                 {
 762                         i = atoi(gsItemPattern);
 763                 }
 764                 // Item prefix
 765                 else
 766                 {
 767                          int    j;
 768                          int    best = -1;
 769                         for( i = 0; i < giNumItems; i ++ )
 770                         {
 771                                 // Prefix match (with case-insensitive match)
 772                                 for( j = 0; gsItemPattern[j]; j ++ )
 773                                 {
 774                                         if( gaItems[i].Desc[j] == gsItemPattern[j] )
 775                                                 continue;
 776                                         if( tolower(gaItems[i].Desc[j]) == tolower(gsItemPattern[j]) )
 777                                                 continue;
 778                                         break;
 779                                 }
 780                                 // Check if the prefix matched
 781                                 if( gsItemPattern[j] != '\0' )
 782                                         continue;
 783
 784                                 // Prefect match
 785                                 if( gaItems[i].Desc[j] == '\0' ) {
 786                                         best = i;
 787                                         break;
 788                                 }
 789
 790                                 // Only one match allowed
 791                                 if( best == -1 ) {
 792                                         best = i;
 793                                 }
 794                                 else {
 795                                         // TODO: Allow ambiguous matches?
 796                                         // or just print a wanrning
 797                                         printf("Warning - Ambiguous pattern, stopping\n");
 798                                         return RV_BAD_ITEM;
 799                                 }
 800                         }
 801
 802                         // Was a match found?
 803                         if( best == -1 )
 804                         {
 805                                 fprintf(stderr, "No item matches the passed string\n");
 806                                 return RV_BAD_ITEM;
 807                         }
 808
 809                         i = best;
 810                 }
 811         }
 812         else if( giUIMode != UI_MODE_BASIC )
 813         {
 814                 i = ShowNCursesUI();
 815         }
 816         else
 817         {
 818                 // Very basic dispense interface
 819                 for( i = 0; i < giNumItems; i ++ ) {
 820                         // Add a separator
 821                         if( i && strcmp(gaItems[i].Type, gaItems[i-1].Type) != 0 )
 822                                 printf("   ---\n");
 823
 824                         printf("%2i %s:%i\t%3i %s\n", i, gaItems[i].Type, gaItems[i].ID,
 825                                 gaItems[i].Price, gaItems[i].Desc);
 826                 }
 827                 printf(" q Quit\n");
 828                 for(;;)
 829                 {
 830                         char    *buf;
 831
 832                         i = -1;
 833
 834                         fgets(buffer, BUFSIZ, stdin);
 835
 836                         buf = trim(buffer);
 837
 838                         if( buf[0] == 'q' )     break;
 839
 840                         i = atoi(buf);
 841
 842                         if( i != 0 || buf[0] == '0' )
 843                         {
 844                                 if( i < 0 || i >= giNumItems ) {
 845                                         printf("Bad item %i (should be between 0 and %i)\n", i, giNumItems);
 846                                         continue;
 847                                 }
 848                                 break;
 849                         }
 850                 }
 851         }
 852
 853
 854         // Check for a valid item ID
 855         if( i >= 0 )
 856         {
 857                  int j;
 858                 // Connect, Authenticate, dispense and close
 859                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 860                 if( sock < 0 )  return RV_SOCKET_ERROR;
 861
 862                 ret = Dispense_ItemInfo(sock, gaItems[i].Type, gaItems[i].ID);
 863                 if(ret) return ret;
 864
 865                 ret = Authenticate(sock);
 866                 if(ret) return ret;
 867
 868                 for( j = 0; j < giDispenseCount; j ++ ) {
 869                         ret = DispenseItem(sock, gaItems[i].Type, gaItems[i].ID);
 870                         if( ret )       break;
 871                 }
 872                 if( j > 1 ) {
 873                         printf("%i items dispensed\n", j);
 874                 }
 875                 Dispense_ShowUser(sock, gsUserName);
 876                 close(sock);
 877
 878         }
 879
 880         return ret;
 881 }
 882
 883 // -------------------
 884 // --- NCurses GUI ---
 885 // -------------------
 886 /**
 887  * \brief Render the NCurses UI
 888  */
 889 int ShowNCursesUI(void)
 890 {
 891          int    ch;
 892          int    i, times;
 893          int    xBase, yBase;
 894         const int       displayMinWidth = 50;
 895         char    *titleString = "Dispense";
 896          int    items_in_view;
 897          int    maxItemIndex;
 898          int    itemBase = 0;
 899          int    currentItem;
 900          int    ret = -2;       // -2: Used for marking "no return yet"
 901
 902         char    balance_str[5+1+2+1];   // If $9999.99 is too little, something's wrong
 903         char    *username;
 904         struct passwd *pwd;
 905
 906          int    height, width;
 907
 908         // Get Username
 909         if( gsEffectiveUser )
 910                 username = gsEffectiveUser;
 911         else {
 912                 pwd = getpwuid( getuid() );
 913                 username = pwd->pw_name;
 914         }
 915         // Get balance
 916         snprintf(balance_str, sizeof(balance_str), "$%i.%02i", giUserBalance/100, abs(giUserBalance)%100);
 917
 918         // Enter curses mode
 919         initscr();
 920         cbreak(); noecho();
 921
 922         // Get max index
 923         maxItemIndex = ShowItemAt(0, 0, 0, -1, 0);
 924         // Get item count per screen
 925         // - 6: randomly chosen (Need at least 3)
 926         items_in_view = LINES - 6;
 927         if( items_in_view > maxItemIndex )
 928                 items_in_view = maxItemIndex;
 929         // Get first index
 930         currentItem = 0;
 931         while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
 932                 currentItem ++;
 933
 934
 935         // Get dimensions
 936         height = items_in_view + 3;
 937         width = displayMinWidth;
 938
 939         // Get positions
 940         xBase = COLS/2 - width/2;
 941         yBase = LINES/2 - height/2;
 942
 943         for( ;; )
 944         {
 945                 // Header
 946                 PrintAlign(yBase, xBase, width, "/", '-', titleString, '-', "\\");
 947
 948                 // Items
 949                 for( i = 0; i < items_in_view; i ++ )
 950                 {
 951                          int    pos = 0;
 952
 953                         move( yBase + 1 + i, xBase );
 954                         printw("| ");
 955
 956                         pos += 2;
 957
 958                         // Check for the '...' row
 959                         // - Oh god, magic numbers!
 960                         if( (i == 0 && itemBase > 0)
 961                          || (i == items_in_view - 1 && itemBase < maxItemIndex - items_in_view) )
 962                         {
 963                                 printw("     ...");     pos += 8;
 964                                 times = (width - pos) - 1;
 965                                 while(times--)  addch(' ');
 966                         }
 967                         // Show an item
 968                         else {
 969                                 ShowItemAt(
 970                                         yBase + 1 + i, xBase + pos,     // Position
 971                                         (width - pos) - 3,      // Width
 972                                         itemBase + i,   // Index
 973                                         !!(currentItem == itemBase + i) // Hilighted
 974                                         );
 975                                 printw("  ");
 976                         }
 977
 978                         // Scrollbar (if needed)
 979                         if( maxItemIndex > items_in_view ) {
 980                                 if( i == 0 ) {
 981                                         addch('A');
 982                                 }
 983                                 else if( i == items_in_view - 1 ) {
 984                                         addch('V');
 985                                 }
 986                                 else {
 987                                          int    percentage = itemBase * 100 / (maxItemIndex-items_in_view);
 988                                         if( i-1 == percentage*(items_in_view-3)/100 ) {
 989                                                 addch('#');
 990                                         }
 991                                         else {
 992                                                 addch('|');
 993                                         }
 994                                 }
 995                         }
 996                         else {
 997                                 addch('|');
 998                         }
 999                 }
1000
1001                 // Footer
1002                 PrintAlign(yBase+height-2, xBase, width, "\\", '-', "", '-', "/");
1003
1004                 // User line
1005                 // - Username, balance, flags
1006                 PrintAlign(yBase+height-1, xBase+1, width-2,
1007                         username, ' ', balance_str, ' ', gsUserFlags);
1008
1009
1010                 // Get input
1011                 ch = getch();
1012
1013                 if( ch == '\x1B' ) {
1014                         ch = getch();
1015                         if( ch == '[' ) {
1016                                 ch = getch();
1017
1018                                 switch(ch)
1019                                 {
1020                                 case 'B':
1021                                         currentItem ++;
1022                                         // Skip over spacers
1023                                         while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
1024                                                 currentItem ++;
1025
1026                                         if( currentItem >= maxItemIndex ) {
1027                                                 currentItem = 0;
1028                                                 // Skip over spacers
1029                                                 while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
1030                                                         currentItem ++;
1031                                         }
1032                                         break;
1033                                 case 'A':
1034                                         currentItem --;
1035                                         // Skip over spacers
1036                                         while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
1037                                                 currentItem --;
1038
1039                                         if( currentItem < 0 ) {
1040                                                 currentItem = maxItemIndex - 1;
1041                                                 // Skip over spacers
1042                                                 while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
1043                                                         currentItem --;
1044                                         }
1045                                         break;
1046                                 }
1047                         }
1048                         else {
1049
1050                         }
1051
1052                         // Scroll only if needed
1053                         if( items_in_view < maxItemIndex )
1054                         {
1055                                 // - If the current item is above the second item shown, and we're not at the top
1056                                 if( currentItem < itemBase + 2 && itemBase > 0 ) {
1057                                         itemBase = currentItem - 2;
1058                                         if(itemBase < 0)        itemBase = 0;
1059                                 }
1060                                 // - If the current item is below the second item show, and we're not at the bottom
1061                                 if( currentItem > itemBase + items_in_view - 2 && itemBase + items_in_view < maxItemIndex ) {
1062                                         itemBase = currentItem - items_in_view + 2;
1063                                         if( itemBase > maxItemIndex - items_in_view )
1064                                                 itemBase = maxItemIndex - items_in_view;
1065                                 }
1066                         }
1067                 }
1068                 else {
1069                         switch(ch)
1070                         {
1071                         case '\n':
1072                                 ret = ShowItemAt(0, 0, 0, currentItem, 0);
1073                                 break;
1074                         case 0x1b:      // Escape
1075                         case 'q':
1076                                 ret = -1;       // -1: Return with no dispense
1077                                 break;
1078                         }
1079
1080                         // Check if the return value was changed
1081                         if( ret != -2 ) break;
1082                 }
1083
1084         }
1085
1086
1087         // Leave
1088         endwin();
1089         return ret;
1090 }
1091
1092 /**
1093  * \brief Show item \a Index at (\a Col, \a Row)
1094  * \return Dispense index of item
1095  * \note Part of the NCurses UI
1096  */
1097 int ShowItemAt(int Row, int Col, int Width, int Index, int bHilighted)
1098 {
1099         char    *name = NULL;
1100          int    price = 0;
1101          int    status = -1;
1102
1103         switch(giUIMode)
1104         {
1105         // Standard UI
1106         // - This assumes that
1107         case UI_MODE_STANDARD:
1108                 // Bounds check
1109                 // Index = -1, request limit
1110                 if( Index < 0 || Index >= giNumItems+2 )
1111                         return giNumItems+2;
1112                 // Drink label
1113                 if( Index == 0 )
1114                 {
1115                         price = 0;
1116                         name = "Coke Machine";
1117                         Index = -1;     // -1 indicates a label
1118                         break;
1119                 }
1120                 Index --;
1121                 // Drinks 0 - 6
1122                 if( Index <= 6 )
1123                 {
1124                         name = gaItems[Index].Desc;
1125                         price = gaItems[Index].Price;
1126                         status = gaItems[Index].Status;
1127                         break;
1128                 }
1129                 Index -= 7;
1130                 // EPS label
1131                 if( Index == 0 )
1132                 {
1133                         price = 0;
1134                         name = "Electronic Payment System";
1135                         Index = -1;     // -1 indicates a label
1136                         break;
1137                 }
1138                 Index --;
1139                 Index += 7;
1140                 name = gaItems[Index].Desc;
1141                 price = gaItems[Index].Price;
1142                 status = gaItems[Index].Status;
1143                 break;
1144         default:
1145                 return -1;
1146         }
1147
1148         // Width = 0, don't print
1149         if( Width > 0 )
1150         {
1151                 // 4 preceding, 5 price
1152                 int nameWidth = Width - 4 - snprintf(NULL, 0, " %4i", price);
1153                 move( Row, Col );
1154
1155                 if( Index >= 0 )
1156                 {
1157                         // Show hilight and status
1158                         switch( status )
1159                         {
1160                         case 0:
1161                                 if( bHilighted )
1162                                         printw("->  ");
1163                                 else
1164                                         printw("    ");
1165                                 break;
1166                         case 1:
1167                                 printw("SLD ");
1168                                 break;
1169
1170                         default:
1171                         case -1:
1172                                 printw("ERR ");
1173                                 break;
1174                         }
1175
1176                         printw("%-*.*s", nameWidth, nameWidth, name);
1177
1178                         printw(" %4i", price);
1179                 }
1180                 else
1181                 {
1182                         printw("-- %-*.*s ", Width-4, Width-4, name);
1183                 }
1184         }
1185
1186         // If the item isn't availiable for sale, return -1 (so it's skipped)
1187         if( status || (price > giUserBalance && gbDisallowSelectWithoutBalance) )
1188                 Index = -1;
1189
1190         return Index;
1191 }
1192
1193 /**
1194  * \brief Print a three-part string at the specified position (formatted)
1195  * \note NCurses UI Helper
1196  *
1197  * Prints \a Left on the left of the area, \a Right on the righthand side
1198  * and \a Mid in the middle of the area. These are padded with \a Pad1
1199  * between \a Left and \a Mid, and \a Pad2 between \a Mid and \a Right.
1200  *
1201  * ::printf style format codes are allowed in \a Left, \a Mid and \a Right,
1202  * and the arguments to these are read in that order.
1203  */
1204 void PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1,
1205         const char *Mid, char Pad2, const char *Right, ...)
1206 {
1207          int    lLen, mLen, rLen;
1208          int    times;
1209
1210         va_list args;
1211
1212         // Get the length of the strings
1213         va_start(args, Right);
1214         lLen = vsnprintf(NULL, 0, Left, args);
1215         mLen = vsnprintf(NULL, 0, Mid, args);
1216         rLen = vsnprintf(NULL, 0, Right, args);
1217         va_end(args);
1218
1219         // Sanity check
1220         if( lLen + mLen/2 > Width/2 || mLen/2 + rLen > Width/2 ) {
1221                 return ;        // TODO: What to do?
1222         }
1223
1224         move(Row, Col);
1225
1226         // Render strings
1227         va_start(args, Right);
1228         // - Left
1229         {
1230                 char    tmp[lLen+1];
1231                 vsnprintf(tmp, lLen+1, Left, args);
1232                 addstr(tmp);
1233         }
1234         // - Left padding
1235         times = (Width - mLen)/2 - lLen;
1236         while(times--)  addch(Pad1);
1237         // - Middle
1238         {
1239                 char    tmp[mLen+1];
1240                 vsnprintf(tmp, mLen+1, Mid, args);
1241                 addstr(tmp);
1242         }
1243         // - Right Padding
1244         times = (Width - mLen)/2 - rLen;
1245         if( (Width - mLen) % 2 )        times ++;
1246         while(times--)  addch(Pad2);
1247         // - Right
1248         {
1249                 char    tmp[rLen+1];
1250                 vsnprintf(tmp, rLen+1, Right, args);
1251                 addstr(tmp);
1252         }
1253 }
1254
1255 // ---------------------
1256 // --- Coke Protocol ---
1257 // ---------------------
1258 int OpenConnection(const char *Host, int Port)
1259 {
1260         struct hostent  *host;
1261         struct sockaddr_in      serverAddr;
1262          int    sock;
1263
1264         host = gethostbyname(Host);
1265         if( !host ) {
1266                 fprintf(stderr, "Unable to look up '%s'\n", Host);
1267                 return -1;
1268         }
1269
1270         memset(&serverAddr, 0, sizeof(serverAddr));
1271
1272         serverAddr.sin_family = AF_INET;        // IPv4
1273         // NOTE: I have a suspicion that IPv6 will play sillybuggers with this :)
1274         serverAddr.sin_addr.s_addr = *((unsigned long *) host->h_addr_list[0]);
1275         serverAddr.sin_port = htons(Port);
1276
1277         sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
1278         if( sock < 0 ) {
1279                 fprintf(stderr, "Failed to create socket\n");
1280                 return -1;
1281         }
1282
1283 //      printf("geteuid() = %i, getuid() = %i\n", geteuid(), getuid());
1284
1285         if( geteuid() == 0 || getuid() == 0 )
1286         {
1287                  int    i;
1288                 struct sockaddr_in      localAddr;
1289                 memset(&localAddr, 0, sizeof(localAddr));
1290                 localAddr.sin_family = AF_INET; // IPv4
1291
1292                 // Loop through all the top ports until one is avaliable
1293                 for( i = 512; i < 1024; i ++)
1294                 {
1295                         localAddr.sin_port = htons(i);  // IPv4
1296                         // Attempt to bind to low port for autoauth
1297                         if( bind(sock, (struct sockaddr*)&localAddr, sizeof(localAddr)) == 0 )
1298                                 break;
1299                 }
1300                 if( i == 1024 )
1301                         printf("Warning: AUTOAUTH unavaliable\n");
1302 //              else
1303 //                      printf("Bound to 0.0.0.0:%i\n", i);
1304         }
1305
1306         if( connect(sock, (struct sockaddr *) &serverAddr, sizeof(serverAddr)) < 0 ) {
1307                 fprintf(stderr, "Failed to connect to server\n");
1308                 return -1;
1309         }
1310
1311         // We're not authenticated if the connection has just opened
1312         gbIsAuthenticated = 0;
1313
1314         return sock;
1315 }
1316
1317 /**
1318  * \brief Authenticate with the server
1319  * \return Boolean Failure
1320  */
1321 int Authenticate(int Socket)
1322 {
1323         struct passwd   *pwd;
1324         char    *buf;
1325          int    responseCode;
1326         #if ATTEMPT_PASSWORD_AUTH
1327         char    salt[32];
1328          int    i;
1329         regmatch_t      matches[4];
1330         #endif
1331
1332         if( gbIsAuthenticated ) return 0;
1333
1334         // Get user name
1335         pwd = getpwuid( getuid() );
1336
1337         // Attempt automatic authentication
1338         sendf(Socket, "AUTOAUTH %s\n", pwd->pw_name);
1339
1340         // Check if it worked
1341         buf = ReadLine(Socket);
1342
1343         responseCode = atoi(buf);
1344         switch( responseCode )
1345         {
1346         case 200:       // Autoauth succeeded, return
1347                 free(buf);
1348                 break;
1349
1350         case 401:       // Untrusted, attempt password authentication
1351                 free(buf);
1352
1353                 #if ATTEMPT_PASSWORD_AUTH
1354                 sendf(Socket, "USER %s\n", pwd->pw_name);
1355                 printf("Using username %s\n", pwd->pw_name);
1356
1357                 buf = ReadLine(Socket);
1358
1359                 // TODO: Get Salt
1360                 // Expected format: 100 SALT <something> ...
1361                 // OR             : 100 User Set
1362                 RunRegex(&gSaltRegex, buf, 4, matches, "Malformed server response");
1363                 responseCode = atoi(buf);
1364                 if( responseCode != 100 ) {
1365                         fprintf(stderr, "Unknown repsonse code %i from server\n%s\n", responseCode, buf);
1366                         free(buf);
1367                         return RV_UNKNOWN_ERROR;        // ERROR
1368                 }
1369
1370                 // Check for salt
1371                 if( memcmp( buf+matches[2].rm_so, "SALT", matches[2].rm_eo - matches[2].rm_so) == 0) {
1372                         // Store it for later
1373                         memcpy( salt, buf + matches[3].rm_so, matches[3].rm_eo - matches[3].rm_so );
1374                         salt[ matches[3].rm_eo - matches[3].rm_so ] = 0;
1375                 }
1376                 free(buf);
1377
1378                 // Give three attempts
1379                 for( i = 0; i < 3; i ++ )
1380                 {
1381                          int    ofs = strlen(pwd->pw_name)+strlen(salt);
1382                         char    tmpBuf[42];
1383                         char    tmp[ofs+20];
1384                         char    *pass = getpass("Password: ");
1385                         uint8_t h[20];
1386
1387                         // Create hash string
1388                         // <username><salt><hash>
1389                         strcpy(tmp, pwd->pw_name);
1390                         strcat(tmp, salt);
1391                         SHA1( (unsigned char*)pass, strlen(pass), h );
1392                         memcpy(tmp+ofs, h, 20);
1393
1394                         // Hash all that
1395                         SHA1( (unsigned char*)tmp, ofs+20, h );
1396                         sprintf(tmpBuf, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
1397                                 h[ 0], h[ 1], h[ 2], h[ 3], h[ 4], h[ 5], h[ 6], h[ 7], h[ 8], h[ 9],
1398                                 h[10], h[11], h[12], h[13], h[14], h[15], h[16], h[17], h[18], h[19]
1399                                 );
1400
1401                         // Send password
1402                         sendf(Socket, "PASS %s\n", tmpBuf);
1403                         buf = ReadLine(Socket);
1404
1405                         responseCode = atoi(buf);
1406                         // Auth OK?
1407                         if( responseCode == 200 )       break;
1408                         // Bad username/password
1409                         if( responseCode == 401 )       continue;
1410
1411                         fprintf(stderr, "Unknown repsonse code %i from server\n%s\n", responseCode, buf);
1412                         free(buf);
1413                         return RV_UNKNOWN_ERROR;
1414                 }
1415                 free(buf);
1416                 if( i == 3 )
1417                         return RV_INVALID_USER; // 2 = Bad Password
1418
1419                 #else
1420                 fprintf(stderr, "Untrusted host, AUTOAUTH unavaliable\n");
1421                 return RV_INVALID_USER;
1422                 #endif
1423                 break;
1424
1425         case 404:       // Bad Username
1426                 fprintf(stderr, "Bad Username '%s'\n", pwd->pw_name);
1427                 free(buf);
1428                 return RV_INVALID_USER;
1429
1430         default:
1431                 fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1432                 printf("%s\n", buf);
1433                 free(buf);
1434                 return RV_UNKNOWN_ERROR;
1435         }
1436
1437         // Set effective user
1438         if( gsEffectiveUser ) {
1439                 sendf(Socket, "SETEUSER %s\n", gsEffectiveUser);
1440
1441                 buf = ReadLine(Socket);
1442                 responseCode = atoi(buf);
1443
1444                 switch(responseCode)
1445                 {
1446                 case 200:
1447                         printf("Running as '%s' by '%s'\n", gsEffectiveUser, pwd->pw_name);
1448                         break;
1449
1450                 case 403:
1451                         printf("Only coke members can use `dispense -u`\n");
1452                         free(buf);
1453                         return RV_PERMISSIONS;
1454
1455                 case 404:
1456                         printf("Invalid user selected\n");
1457                         free(buf);
1458                         return RV_INVALID_USER;
1459
1460                 default:
1461                         fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1462                         printf("%s\n", buf);
1463                         free(buf);
1464                         return RV_UNKNOWN_ERROR;
1465                 }
1466
1467                 free(buf);
1468         }
1469
1470         gbIsAuthenticated = 1;
1471
1472         return 0;
1473 }
1474
1475 int GetUserBalance(int Socket)
1476 {
1477         regmatch_t      matches[6];
1478         struct passwd   *pwd;
1479         char    *buf;
1480          int    responseCode;
1481
1482         if( !gsUserName )
1483         {
1484                 if( gsEffectiveUser ) {
1485                         gsUserName = gsEffectiveUser;
1486                 }
1487                 else {
1488                         pwd = getpwuid( getuid() );
1489                         gsUserName = strdup(pwd->pw_name);
1490                 }
1491         }
1492
1493         sendf(Socket, "USER_INFO %s\n", gsUserName);
1494         buf = ReadLine(Socket);
1495         responseCode = atoi(buf);
1496         switch(responseCode)
1497         {
1498         case 202:       break;  // Ok
1499
1500         case 404:
1501                 printf("Invalid user? (USER_INFO failed)\n");
1502                 free(buf);
1503                 return RV_INVALID_USER;
1504
1505         default:
1506                 fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1507                 printf("%s\n", buf);
1508                 free(buf);
1509                 return RV_UNKNOWN_ERROR;
1510         }
1511
1512         RunRegex(&gUserInfoRegex, buf, 6, matches, "Malformed server response");
1513
1514         giUserBalance = atoi( buf + matches[4].rm_so );
1515         gsUserFlags = strdup( buf + matches[5].rm_so );
1516
1517         free(buf);
1518
1519         return 0;
1520 }
1521
1522 /**
1523  * \brief Read an item info response from the server
1524  * \param Dest  Destination for the read item (strings will be on the heap)
1525  */
1526 int ReadItemInfo(int Socket, tItem *Dest)
1527 {
1528         char    *buf;
1529          int    responseCode;
1530
1531         regmatch_t      matches[8];
1532         char    *statusStr;
1533
1534         // Get item info
1535         buf = ReadLine(Socket);
1536         responseCode = atoi(buf);
1537
1538         switch(responseCode)
1539         {
1540         case 202:       break;
1541
1542         case 406:
1543                 printf("Bad item name\n");
1544                 free(buf);
1545                 return RV_BAD_ITEM;
1546
1547         default:
1548                 fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n%s", responseCode, buf);
1549                 free(buf);
1550                 return RV_UNKNOWN_ERROR;
1551         }
1552
1553         RunRegex(&gItemRegex, buf, 8, matches, "Malformed server response");
1554
1555         buf[ matches[3].rm_eo ] = '\0';
1556         buf[ matches[5].rm_eo ] = '\0';
1557         buf[ matches[7].rm_eo ] = '\0';
1558
1559         statusStr = &buf[ matches[5].rm_so ];
1560
1561         Dest->ID = atoi( buf + matches[4].rm_so );
1562
1563         if( strcmp(statusStr, "avail") == 0 )
1564                 Dest->Status = 0;
1565         else if( strcmp(statusStr, "sold") == 0 )
1566                 Dest->Status = 1;
1567         else if( strcmp(statusStr, "error") == 0 )
1568                 Dest->Status = -1;
1569         else {
1570                 fprintf(stderr, "Unknown response from dispense server (status '%s')\n",
1571                         statusStr);
1572                 return RV_UNKNOWN_ERROR;
1573         }
1574         Dest->Price = atoi( buf + matches[6].rm_so );
1575
1576         // Hack a little to reduce heap fragmentation
1577         {
1578                 char    tmpType[strlen(buf + matches[3].rm_so) + 1];
1579                 char    tmpDesc[strlen(buf + matches[7].rm_so) + 1];
1580                 strcpy(tmpType, buf + matches[3].rm_so);
1581                 strcpy(tmpDesc, buf + matches[7].rm_so);
1582                 free(buf);
1583                 Dest->Type = strdup( tmpType );
1584                 Dest->Desc = strdup( tmpDesc );
1585         }
1586
1587         return 0;
1588 }
1589
1590 /**
1591  * \brief Fill the item information structure
1592  * \return Boolean Failure
1593  */
1594 void PopulateItemList(int Socket)
1595 {
1596         char    *buf;
1597          int    responseCode;
1598
1599         char    *arrayType;
1600          int    count, i;
1601         regmatch_t      matches[4];
1602
1603         // Ask server for stock list
1604         send(Socket, "ENUM_ITEMS\n", 11, 0);
1605         buf = ReadLine(Socket);
1606
1607         //printf("Output: %s\n", buf);
1608
1609         responseCode = atoi(buf);
1610         if( responseCode != 201 ) {
1611                 fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n", responseCode);
1612                 exit(RV_UNKNOWN_ERROR);
1613         }
1614
1615         // - Get item list -
1616
1617         // Expected format:
1618         //  201 Items <count>
1619         //  202 Item <count>
1620         RunRegex(&gArrayRegex, buf, 4, matches, "Malformed server response");
1621
1622         arrayType = &buf[ matches[2].rm_so ];   buf[ matches[2].rm_eo ] = '\0';
1623         count = atoi( &buf[ matches[3].rm_so ] );
1624
1625         // Check array type
1626         if( strcmp(arrayType, "Items") != 0 ) {
1627                 // What the?!
1628                 fprintf(stderr, "Unexpected array type, expected 'Items', got '%s'\n",
1629                         arrayType);
1630                 exit(RV_UNKNOWN_ERROR);
1631         }
1632         free(buf);
1633
1634         giNumItems = count;
1635         gaItems = malloc( giNumItems * sizeof(tItem) );
1636
1637         // Fetch item information
1638         for( i = 0; i < giNumItems; i ++ )
1639         {
1640                 ReadItemInfo( Socket, &gaItems[i] );
1641         }
1642
1643         // Read end of list
1644         buf = ReadLine(Socket);
1645         responseCode = atoi(buf);
1646
1647         if( responseCode != 200 ) {
1648                 fprintf(stderr, "Unknown response from dispense server %i\n'%s'",
1649                         responseCode, buf
1650                         );
1651                 exit(-1);
1652         }
1653
1654         free(buf);
1655 }
1656
1657
1658 /**
1659  * \brief Get information on an item
1660  * \return Boolean Failure
1661  */
1662 int Dispense_ItemInfo(int Socket, const char *Type, int ID)
1663 {
1664         tItem   item;
1665          int    ret;
1666
1667         // Query
1668         sendf(Socket, "ITEM_INFO %s:%i\n", Type, ID);
1669
1670         ret = ReadItemInfo(Socket, &item);
1671         if(ret) return ret;
1672
1673         printf("%8s:%-2i %2i.%02i %s\n",
1674                 item.Type, item.ID,
1675                 item.Price/100, item.Price%100,
1676                 item.Desc);
1677
1678         free(item.Type);
1679         free(item.Desc);
1680
1681         return 0;
1682 }
1683
1684 /**
1685  * \brief Dispense an item
1686  * \return Boolean Failure
1687  */
1688 int DispenseItem(int Socket, const char *Type, int ID)
1689 {
1690          int    ret, responseCode;
1691         char    *buf;
1692
1693         // Check for a dry run
1694         if( gbDryRun ) {
1695                 printf("Dry Run - No action\n");
1696                 return 0;
1697         }
1698
1699         // Dispense!
1700         sendf(Socket, "DISPENSE %s:%i\n", Type, ID);
1701         buf = ReadLine(Socket);
1702
1703         responseCode = atoi(buf);
1704         switch( responseCode )
1705         {
1706         case 200:
1707                 printf("Dispense OK\n");
1708                 ret = 0;
1709                 break;
1710         case 401:
1711                 printf("Not authenticated\n");
1712                 ret = RV_PERMISSIONS;
1713                 break;
1714         case 402:
1715                 printf("Insufficient balance\n");
1716                 ret = RV_BALANCE;
1717                 break;
1718         case 406:
1719                 printf("Bad item name\n");
1720                 ret = RV_BAD_ITEM;
1721                 break;
1722         case 500:
1723                 printf("Item failed to dispense, is the slot empty?\n");
1724                 ret = RV_SERVER_ERROR;
1725                 break;
1726         case 501:
1727                 printf("Dispense not possible (slot empty/permissions)\n");
1728                 ret = RV_SERVER_ERROR;
1729                 break;
1730         default:
1731                 printf("Unknown response code %i ('%s')\n", responseCode, buf);
1732                 ret = RV_UNKNOWN_ERROR;
1733                 break;
1734         }
1735
1736         free(buf);
1737         return ret;
1738 }
1739
1740 /**
1741  * \brief Alter a user's balance
1742  */
1743 int Dispense_AlterBalance(int Socket, const char *Username, int Ammount, const char *Reason)
1744 {
1745         char    *buf;
1746          int    responseCode, rv = -1;
1747
1748         // Check for a dry run
1749         if( gbDryRun ) {
1750                 printf("Dry Run - No action\n");
1751                 return 0;
1752         }
1753
1754         // Sanity
1755         if( Ammount == 0 ) {
1756                 printf("An amount would be nice\n");
1757                 return RV_ARGUMENTS;
1758         }
1759
1760         sendf(Socket, "ADD %s %i %s\n", Username, Ammount, Reason);
1761         buf = ReadLine(Socket);
1762
1763         responseCode = atoi(buf);
1764
1765         switch(responseCode)
1766         {
1767         case 200:
1768                 rv = 0; // OK
1769                 break;
1770         case 402:
1771                 fprintf(stderr, "Insufficient balance\n");
1772                 rv = RV_BAD_ITEM;
1773                 break;
1774         case 403:       // Not in coke
1775                 fprintf(stderr, "You are not in coke (sucker)\n");
1776                 rv = RV_PERMISSIONS;
1777                 break;
1778         case 404:       // Unknown user
1779                 fprintf(stderr, "Unknown user '%s'\n", Username);
1780                 rv = RV_INVALID_USER;
1781                 break;
1782         default:
1783                 fprintf(stderr, "Unknown response code %i\n'%s'\n", responseCode, buf);
1784                 rv = RV_UNKNOWN_RESPONSE;
1785                 break;
1786         }
1787         free(buf);
1788
1789         return rv;
1790 }
1791
1792 /**
1793  * \brief Set a user's balance
1794  * \note Only avaliable to dispense admins
1795  */
1796 int Dispense_SetBalance(int Socket, const char *Username, int Balance, const char *Reason)
1797 {
1798         char    *buf;
1799          int    responseCode;
1800
1801         // Check for a dry run
1802         if( gbDryRun ) {
1803                 printf("Dry Run - No action\n");
1804                 return 0;
1805         }
1806
1807         sendf(Socket, "SET %s %i %s\n", Username, Balance, Reason);
1808         buf = ReadLine(Socket);
1809
1810         responseCode = atoi(buf);
1811         free(buf);
1812
1813         switch(responseCode)
1814         {
1815         case 200:       return 0;       // OK
1816         case 403:       // Not in coke
1817                 fprintf(stderr, "You are not an admin\n");
1818                 return RV_PERMISSIONS;
1819         case 404:       // Unknown user
1820                 fprintf(stderr, "Unknown user '%s'\n", Username);
1821                 return RV_INVALID_USER;
1822         default:
1823                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1824                 return RV_UNKNOWN_RESPONSE;
1825         }
1826
1827         return -1;
1828 }
1829
1830 /**
1831  * \brief Give money to another user
1832  */
1833 int Dispense_Give(int Socket, const char *Username, int Ammount, const char *Reason)
1834 {
1835         char    *buf;
1836          int    responseCode;
1837
1838         if( Ammount < 0 ) {
1839                 printf("Sorry, you can only give, you can't take.\n");
1840                 return RV_ARGUMENTS;
1841         }
1842
1843         // Fast return on zero
1844         if( Ammount == 0 ) {
1845                 printf("Are you actually going to give any?\n");
1846                 return RV_ARGUMENTS;
1847         }
1848
1849         // Check for a dry run
1850         if( gbDryRun ) {
1851                 printf("Dry Run - No action\n");
1852                 return 0;
1853         }
1854
1855         sendf(Socket, "GIVE %s %i %s\n", Username, Ammount, Reason);
1856
1857         buf = ReadLine(Socket);
1858         responseCode = atoi(buf);
1859         free(buf);
1860         switch(responseCode)
1861         {
1862         case 200:
1863                 printf("Give succeeded\n");
1864                 return RV_SUCCESS;      // OK
1865
1866         case 402:
1867                 fprintf(stderr, "Insufficient balance\n");
1868                 return RV_BALANCE;
1869
1870         case 404:       // Unknown user
1871                 fprintf(stderr, "Unknown user '%s'\n", Username);
1872                 return RV_INVALID_USER;
1873
1874         default:
1875                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1876                 return RV_UNKNOWN_RESPONSE;
1877         }
1878
1879         return -1;
1880 }
1881
1882 int Dispense_Refund(int Socket, const char *Username, const char *Item, int PriceOverride)
1883 {
1884         char    *buf;
1885          int    responseCode, ret = -1;
1886
1887         // Check item id
1888         if( RunRegex(&gUserItemIdentRegex, Item, 0, NULL, NULL) != 0 )
1889         {
1890                 fprintf(stderr, "Error: Invalid item ID passed (should be <type>:<num>)\n");
1891                 return RV_ARGUMENTS;
1892         }
1893
1894         // Check username (quick)
1895         if( strchr(Username, ' ') || strchr(Username, '\n') )
1896         {
1897                 fprintf(stderr, "Error: Username is invalid (no spaces or newlines please)\n");
1898                 return RV_ARGUMENTS;
1899         }
1900
1901         // Send the query
1902         sendf(Socket, "REFUND %s %s %i\n", Username, Item, PriceOverride);
1903
1904         buf = ReadLine(Socket);
1905         responseCode = atoi(buf);
1906         switch(responseCode)
1907         {
1908         case 200:
1909                 Dispense_ShowUser(Socket, Username);    // Show destination account
1910                 ret = 0;
1911                 break;
1912         case 403:
1913                 fprintf(stderr, "Refund access is only avaliable to coke members\n");
1914                 ret = RV_PERMISSIONS;
1915                 break;
1916         case 404:
1917                 fprintf(stderr, "Unknown user '%s' passed\n", Username);
1918                 ret = RV_INVALID_USER;
1919                 break;
1920         case 406:
1921                 fprintf(stderr, "Invalid item '%s' passed\n", Item);
1922                 ret = RV_BAD_ITEM;
1923                 break;
1924         default:
1925                 fprintf(stderr, "Unknown response from server %i\n%s\n", responseCode, buf);
1926                 ret = -1;
1927                 break;
1928         }
1929         free(buf);
1930         return ret;
1931 }
1932
1933 /**
1934  * \brief Donate money to the club
1935  */
1936 int Dispense_Donate(int Socket, int Ammount, const char *Reason)
1937 {
1938         char    *buf;
1939          int    responseCode;
1940
1941         if( Ammount < 0 ) {
1942                 printf("Sorry, you can only give, you can't take.\n");
1943                 return -1;
1944         }
1945
1946         // Fast return on zero
1947         if( Ammount == 0 ) {
1948                 printf("Are you actually going to give any?\n");
1949                 return 1;
1950         }
1951
1952         // Check for a dry run
1953         if( gbDryRun ) {
1954                 printf("Dry Run - No action\n");
1955                 return 0;
1956         }
1957
1958         sendf(Socket, "DONATE %i %s\n", Ammount, Reason);
1959         buf = ReadLine(Socket);
1960
1961         responseCode = atoi(buf);
1962         free(buf);
1963
1964         switch(responseCode)
1965         {
1966         case 200:       return 0;       // OK
1967
1968         case 402:
1969                 fprintf(stderr, "Insufficient balance\n");
1970                 return 1;
1971
1972         default:
1973                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1974                 return -1;
1975         }
1976
1977         return -1;
1978 }
1979
1980 /**
1981  * \brief Enumerate users
1982  */
1983 int Dispense_EnumUsers(int Socket)
1984 {
1985         char    *buf;
1986          int    responseCode;
1987          int    nUsers;
1988         regmatch_t      matches[4];
1989
1990         if( giMinimumBalance != INT_MIN ) {
1991                 if( giMaximumBalance != INT_MAX ) {
1992                         sendf(Socket, "ENUM_USERS min_balance:%i max_balance:%i\n", giMinimumBalance, giMaximumBalance);
1993                 }
1994                 else {
1995                         sendf(Socket, "ENUM_USERS min_balance:%i\n", giMinimumBalance);
1996                 }
1997         }
1998         else {
1999                 if( giMaximumBalance != INT_MAX ) {
2000                         sendf(Socket, "ENUM_USERS max_balance:%i\n", giMaximumBalance);
2001                 }
2002                 else {
2003                         sendf(Socket, "ENUM_USERS\n");
2004                 }
2005         }
2006         buf = ReadLine(Socket);
2007         responseCode = atoi(buf);
2008
2009         switch(responseCode)
2010         {
2011         case 201:       break;  // Ok, length follows
2012
2013         default:
2014                 fprintf(stderr, "Unknown response code %i\n%s\n", responseCode, buf);
2015                 free(buf);
2016                 return -1;
2017         }
2018
2019         // Get count (not actually used)
2020         RunRegex(&gArrayRegex, buf, 4, matches, "Malformed server response");
2021         nUsers = atoi( buf + matches[3].rm_so );
2022         printf("%i users returned\n", nUsers);
2023
2024         // Free string
2025         free(buf);
2026
2027         // Read returned users
2028         do {
2029                 buf = ReadLine(Socket);
2030                 responseCode = atoi(buf);
2031
2032                 if( responseCode != 202 )       break;
2033
2034                 _PrintUserLine(buf);
2035                 free(buf);
2036         } while(responseCode == 202);
2037
2038         // Check final response
2039         if( responseCode != 200 ) {
2040                 fprintf(stderr, "Unknown response code %i\n%s\n", responseCode, buf);
2041                 free(buf);
2042                 return -1;
2043         }
2044
2045         free(buf);
2046
2047         return 0;
2048 }
2049
2050 int Dispense_ShowUser(int Socket, const char *Username)
2051 {
2052         char    *buf;
2053          int    responseCode, ret;
2054
2055         sendf(Socket, "USER_INFO %s\n", Username);
2056         buf = ReadLine(Socket);
2057
2058         responseCode = atoi(buf);
2059
2060         switch(responseCode)
2061         {
2062         case 202:
2063                 _PrintUserLine(buf);
2064                 ret = 0;
2065                 break;
2066
2067         case 404:
2068                 printf("Unknown user '%s'\n", Username);
2069                 ret = 1;
2070                 break;
2071
2072         default:
2073                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
2074                 ret = -1;
2075                 break;
2076         }
2077
2078         free(buf);
2079
2080         return ret;
2081 }
2082
2083 void _PrintUserLine(const char *Line)
2084 {
2085         regmatch_t      matches[6];
2086          int    bal;
2087
2088         RunRegex(&gUserInfoRegex, Line, 6, matches, "Malformed server response");
2089         // 3: Username
2090         // 4: Balance
2091         // 5: Flags
2092         {
2093                  int    usernameLen = matches[3].rm_eo - matches[3].rm_so;
2094                 char    username[usernameLen + 1];
2095                  int    flagsLen = matches[5].rm_eo - matches[5].rm_so;
2096                 char    flags[flagsLen + 1];
2097
2098                 memcpy(username, Line + matches[3].rm_so, usernameLen);
2099                 username[usernameLen] = '\0';
2100                 memcpy(flags, Line + matches[5].rm_so, flagsLen);
2101                 flags[flagsLen] = '\0';
2102
2103                 bal = atoi(Line + matches[4].rm_so);
2104                 printf("%-15s: $%8.02f (%s)\n", username, ((float)bal)/100, flags);
2105         }
2106 }
2107
2108 int Dispense_AddUser(int Socket, const char *Username)
2109 {
2110         char    *buf;
2111          int    responseCode, ret;
2112
2113         // Check for a dry run
2114         if( gbDryRun ) {
2115                 printf("Dry Run - No action\n");
2116                 return 0;
2117         }
2118
2119         sendf(Socket, "USER_ADD %s\n", Username);
2120
2121         buf = ReadLine(Socket);
2122         responseCode = atoi(buf);
2123
2124         switch(responseCode)
2125         {
2126         case 200:
2127                 printf("User '%s' added\n", Username);
2128                 ret = 0;
2129                 break;
2130
2131         case 403:
2132                 printf("Only wheel can add users\n");
2133                 ret = 1;
2134                 break;
2135
2136         case 404:
2137                 printf("User '%s' already exists\n", Username);
2138                 ret = 0;
2139                 break;
2140
2141         default:
2142                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
2143                 ret = -1;
2144                 break;
2145         }
2146
2147         free(buf);
2148
2149         return ret;
2150 }
2151
2152 int Dispense_SetUserType(int Socket, const char *Username, const char *TypeString, const char *Reason)
2153 {
2154         char    *buf;
2155          int    responseCode, ret;
2156
2157         // Check for a dry run
2158         if( gbDryRun ) {
2159                 printf("Dry Run - No action\n");
2160                 return 0;
2161         }
2162
2163         // TODO: Pre-validate the string
2164
2165         sendf(Socket, "USER_FLAGS %s %s %s\n", Username, TypeString, Reason);
2166
2167         buf = ReadLine(Socket);
2168         responseCode = atoi(buf);
2169
2170         switch(responseCode)
2171         {
2172         case 200:
2173                 printf("User '%s' updated\n", Username);
2174                 ret = 0;
2175                 break;
2176
2177         case 403:
2178                 printf("Only dispense admins can modify users\n");
2179                 ret = RV_PERMISSIONS;
2180                 break;
2181
2182         case 404:
2183                 printf("User '%s' does not exist\n", Username);
2184                 ret = RV_INVALID_USER;
2185                 break;
2186
2187         case 407:
2188                 printf("Flag string is invalid\n");
2189                 ret = RV_ARGUMENTS;
2190                 break;
2191
2192         default:
2193                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
2194                 ret = RV_UNKNOWN_RESPONSE;
2195                 break;
2196         }
2197
2198         free(buf);
2199
2200         return ret;
2201 }
2202
2203 int Dispense_SetItem(int Socket, const char *Type, int ID, int NewPrice, const char *NewName)
2204 {
2205         char    *buf;
2206          int    responseCode, ret;
2207
2208         // Check for a dry run
2209         if( gbDryRun ) {
2210                 printf("Dry Run - No action\n");
2211                 return 0;
2212         }
2213
2214         sendf(Socket, "UPDATE_ITEM %s:%i %i %s\n", Type, ID, NewPrice, NewName);
2215
2216         buf = ReadLine(Socket);
2217         responseCode = atoi(buf);
2218
2219         switch(responseCode)
2220         {
2221         case 200:
2222                 printf("Item %s:%i updated\n", Type, ID);
2223                 ret = 0;
2224                 break;
2225
2226         case 403:
2227                 printf("Only coke members can modify the slots\n");
2228                 ret = RV_PERMISSIONS;
2229                 break;
2230
2231         case 406:
2232                 printf("Invalid item passed\n");
2233                 ret = RV_BAD_ITEM;
2234                 break;
2235
2236         default:
2237                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
2238                 ret = -1;
2239                 break;
2240         }
2241
2242         free(buf);
2243
2244         return ret;
2245 }
2246
2247 // ---------------
2248 // --- Helpers ---
2249 // ---------------
2250 char *ReadLine(int Socket)
2251 {
2252         static char     buf[BUFSIZ];
2253         static int      bufPos = 0;
2254         static int      bufValid = 0;
2255          int    len;
2256         char    *newline = NULL;
2257          int    retLen = 0;
2258         char    *ret = malloc(10);
2259
2260         #if DEBUG_TRACE_SERVER
2261         printf("ReadLine: ");
2262         fflush(stdout);
2263         #endif
2264
2265         ret[0] = '\0';
2266
2267         while( !newline )
2268         {
2269                 if( bufValid ) {
2270                         len = bufValid;
2271                 }
2272                 else {
2273                         len = recv(Socket, buf+bufPos, BUFSIZ-1-bufPos, 0);
2274                         if( len <= 0 ) {
2275                                 free(ret);
2276                                 return strdup("599 Client Connection Error\n");
2277                         }
2278                 }
2279                 buf[bufPos+len] = '\0';
2280
2281                 newline = strchr( buf+bufPos, '\n' );
2282                 if( newline ) {
2283                         *newline = '\0';
2284                 }
2285
2286                 retLen += strlen(buf+bufPos);
2287                 ret = realloc(ret, retLen + 1);
2288                 strcat( ret, buf+bufPos );
2289
2290                 if( newline ) {
2291                          int    newLen = newline - (buf+bufPos) + 1;
2292                         bufValid = len - newLen;
2293                         len = newLen;
2294                 }
2295                 if( len + bufPos == BUFSIZ - 1 )        bufPos = 0;
2296                 else    bufPos += len;
2297         }
2298
2299         #if DEBUG_TRACE_SERVER
2300         printf("%i '%s'\n", retLen, ret);
2301         #endif
2302
2303         return ret;
2304 }
2305
2306 int sendf(int Socket, const char *Format, ...)
2307 {
2308         va_list args;
2309          int    len;
2310
2311         va_start(args, Format);
2312         len = vsnprintf(NULL, 0, Format, args);
2313         va_end(args);
2314
2315         {
2316                 char    buf[len+1];
2317                 va_start(args, Format);
2318                 vsnprintf(buf, len+1, Format, args);
2319                 va_end(args);
2320
2321                 #if DEBUG_TRACE_SERVER
2322                 printf("sendf: %s", buf);
2323                 #endif
2324
2325                 return send(Socket, buf, len, 0);
2326         }
2327 }
2328
2329 char *trim(char *string)
2330 {
2331          int    i;
2332
2333         while( isspace(*string) )
2334                 string ++;
2335
2336         for( i = strlen(string); i--; )
2337         {
2338                 if( isspace(string[i]) )
2339                         string[i] = '\0';
2340                 else
2341                         break;
2342         }
2343
2344         return string;
2345 }
2346
2347 int RunRegex(regex_t *regex, const char *string, int nMatches, regmatch_t *matches, const char *errorMessage)
2348 {
2349          int    ret;
2350
2351         ret = regexec(regex, string, nMatches, matches, 0);
2352         if( ret && errorMessage ) {
2353                 size_t  len = regerror(ret, regex, NULL, 0);
2354                 char    errorStr[len];
2355                 regerror(ret, regex, errorStr, len);
2356                 printf("string = '%s'\n", string);
2357                 fprintf(stderr, "%s\n%s", errorMessage, errorStr);
2358                 exit(-1);
2359         }
2360
2361         return ret;
2362 }
2363
2364 void CompileRegex(regex_t *regex, const char *pattern, int flags)
2365 {
2366          int    ret = regcomp(regex, pattern, flags);
2367         if( ret ) {
2368                 size_t  len = regerror(ret, regex, NULL, 0);
2369                 char    errorStr[len];
2370                 regerror(ret, regex, errorStr, len);
2371                 fprintf(stderr, "Regex compilation failed - %s\n", errorStr);
2372                 exit(-1);
2373         }
2374 }