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