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                         case '0':       case '1':
 186                         case '2':       case '3':
 187                         case '4':       case '5':
 188                         case '6':       case '7':
 189                         case '8':       case '9':
 190                                 if( text_argc + 1 ==  MAX_TXT_ARGS )
 191                                 {
 192                                         fprintf(stderr, "ERROR: Too many arguments\n");
 193                                         return 1;
 194                                 }
 195                                 text_args[text_argc++] = argv[i];
 196                                 break;
 197                         }
 198
 199                         continue;
 200                 }
 201
 202                 if( text_argc + 1 == MAX_TXT_ARGS )
 203                 {
 204                         fprintf(stderr, "ERROR: Too many arguments\n");
 205                         return 1;
 206                 }
 207
 208                 text_args[text_argc++] = argv[i];
 209
 210         }
 211
 212         //
 213         // `dispense acct`
 214         // -
 215         if( strcmp(text_args[0], "acct") == 0 )
 216         {
 217                 // Connect to server
 218                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 219                 if( sock < 0 )  return -1;
 220                         // List accounts?
 221                 if( text_argc == 1 ) {
 222                         Dispense_EnumUsers(sock);
 223                         close(sock);
 224                         return 0;
 225                 }
 226
 227                 // text_args[1]: Username
 228
 229                 // Alter account?
 230                 if( text_argc == 4 )
 231                 {
 232                         // Authentication required
 233                         if( Authenticate(sock) )
 234                                 return -1;
 235
 236                         // text_args[1]: Username
 237                         // text_args[2]: Ammount
 238                         // text_args[3]: Reason
 239
 240                         if( text_args[2][0] == '=' ) {
 241                                 // Set balance
 242                                 if( text_args[2][1] != '0' && atoi(text_args[2]+1) == 0 ) {
 243                                         fprintf(stderr, "Error: Invalid balance to be set\n");
 244                                         exit(1);
 245                                 }
 246
 247                                 Dispense_SetBalance(sock, text_args[1], atoi(text_args[2]+1), text_args[3]);
 248                         }
 249                         else {
 250                                 // Alter balance
 251                                 Dispense_AlterBalance(sock, text_args[1], atoi(text_args[2]), text_args[3]);
 252                         }
 253                 }
 254
 255                 // Show user information
 256                 Dispense_ShowUser(sock, text_args[1]);
 257
 258                 close(sock);
 259                 return 0;
 260         }
 261         //
 262         // `dispense give`
 263         // - "Here, have some money."
 264         if( strcmp(text_args[0], "give") == 0 )
 265         {
 266                 if( text_argc != 4 ) {
 267                         fprintf(stderr, "`dispense give` takes three arguments\n");
 268                         ShowUsage();
 269                         return -1;
 270                 }
 271
 272                 // text_args[1]: Destination
 273                 // text_args[2]: Ammount
 274                 // text_args[3]: Reason
 275
 276                 // Connect to server
 277                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 278                 if( sock < 0 )  return -1;
 279
 280                 // Authenticate
 281                 if( Authenticate(sock) )
 282                         return -1;
 283
 284                 Dispense_Give(sock, text_args[1], atoi(text_args[2]), text_args[3]);
 285
 286                 close(sock);
 287
 288                 return 0;
 289         }
 290         //
 291         // `dispense user`
 292         // - User administration (Admin Only)
 293         if( strcmp(text_args[0], "user") == 0 )
 294         {
 295                 // Check argument count
 296                 if( text_argc == 1 ) {
 297                         fprintf(stderr, "Error: `dispense user` requires arguments\n");
 298                         ShowUsage();
 299                         exit(1);
 300                 }
 301
 302                 // Connect to server
 303                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 304                 if( sock < 0 )  return -1;
 305
 306                 // Attempt authentication
 307                 if( Authenticate(sock) )
 308                         return -1;
 309
 310                 // Add new user?
 311                 if( strcmp(text_args[1], "add") == 0 )
 312                 {
 313                         if( text_argc != 3 ) {
 314                                 fprintf(stderr, "Error: `dispense user add` requires an argument\n");
 315                                 ShowUsage();
 316                                 exit(1);
 317                         }
 318
 319                         Dispense_AddUser(sock, text_args[2]);
 320                 }
 321                 // Update a user
 322                 else if( strcmp(text_args[1], "type") == 0 || strcmp(text_args[1], "flags") == 0 )
 323                 {
 324                         if( text_argc != 4 ) {
 325                                 fprintf(stderr, "Error: `dispense user flags` requires two arguments\n");
 326                                 ShowUsage();
 327                                 exit(1);
 328                         }
 329
 330                         Dispense_SetUserType(sock, text_args[2], text_args[3]);
 331                 }
 332                 else
 333                 {
 334                         fprintf(stderr, "Error: Unknown sub-command for `dispense user`\n");
 335                         ShowUsage();
 336                         exit(1);
 337                 }
 338                 close(sock);
 339                 return 0;
 340         }
 341         // Donation!
 342         else if( strcmp(text_args[0], "donate") == 0 )
 343         {
 344                 // Check argument count
 345                 if( text_argc != 3 ) {
 346                         fprintf(stderr, "Error: `dispense donate` requires two arguments\n");
 347                         ShowUsage();
 348                         exit(1);
 349                 }
 350
 351                 // Connect to server
 352                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 353                 if( sock < 0 )  return -1;
 354
 355                 // Attempt authentication
 356                 if( Authenticate(sock) )
 357                         return -1;
 358
 359                 // Do donation
 360                 Dispense_Donate(sock, atoi(text_args[1]), text_args[2]);
 361
 362                 close(sock);
 363
 364                 return 0;
 365         }
 366         // Query an item price
 367         else if( strcmp(text_args[0], "iteminfo") == 0 )
 368         {
 369                 regmatch_t matches[3];
 370                 char    *type;
 371                  int    id;
 372                 // Check argument count
 373                 if( text_argc != 2 ) {
 374                         fprintf(stderr, "Error: `dispense iteminfo` requires an argument\n");
 375                         ShowUsage();
 376                         exit(1);
 377                 }
 378                 // Parse item ID
 379                 if( RunRegex(&gUserItemIdentRegex, text_args[1], 3, matches, NULL) != 0 ) {
 380                         fprintf(stderr, "Error: Invalid item ID passed (<type>:<id> expected)\n");
 381                         exit(1);
 382                 }
 383                 type = text_args[1] + matches[1].rm_so;
 384                 text_args[1][ matches[1].rm_eo ] = '\0';
 385                 id = atoi( text_args[1] + matches[2].rm_so );
 386
 387                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 388                 if( sock < 0 )  return -1;
 389                 Dispense_ItemInfo(sock, type, id);
 390                 close(sock);
 391                 return 0;
 392         }
 393         // Item name / pattern
 394         else {
 395                 gsItemPattern = text_args[0];
 396         }
 397
 398         // Connect to server
 399         sock = OpenConnection(gsDispenseServer, giDispensePort);
 400         if( sock < 0 )  return -1;
 401
 402         // Get the user's balance
 403         GetUserBalance(sock);
 404
 405         // Get items
 406         PopulateItemList(sock);
 407
 408         // Disconnect from server
 409         close(sock);
 410
 411         if( gsItemPattern && gsItemPattern[0] )
 412         {
 413                 regmatch_t matches[3];
 414                 // Door (hard coded)
 415                 if( strcmp(gsItemPattern, "door") == 0 )
 416                 {
 417                         // Connect, Authenticate, dispense and close
 418                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 419                         if( sock < 0 )  return -1;
 420                         Authenticate(sock);
 421                         DispenseItem(sock, "door", 0);
 422                         close(sock);
 423                         return 0;
 424                 }
 425                 // Item id (<type>:<num>)
 426                 else if( RunRegex(&gUserItemIdentRegex, gsItemPattern, 3, matches, NULL) == 0 )
 427                 {
 428                         char    *ident;
 429                          int    id;
 430
 431                         // Get and finish ident
 432                         ident = gsItemPattern + matches[1].rm_so;
 433                         gsItemPattern[matches[1].rm_eo] = '\0';
 434                         // Get ID
 435                         id = atoi( gsItemPattern + matches[2].rm_so );
 436
 437                         // Connect, Authenticate, dispense and close
 438                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 439                         if( sock < 0 )  return -1;
 440
 441                         Dispense_ItemInfo(sock, ident, id);
 442
 443                         Authenticate(sock);
 444                         DispenseItem(sock, ident, id);
 445                         close(sock);
 446                         return 0;
 447                 }
 448                 // Item number (6 = coke)
 449                 else if( strcmp(gsItemPattern, "0") == 0 || atoi(gsItemPattern) > 0 )
 450                 {
 451                         i = atoi(gsItemPattern);
 452                 }
 453                 // Item prefix
 454                 else
 455                 {
 456                          int    j;
 457                          int    best = -1;
 458                         for( i = 0; i < giNumItems; i ++ )
 459                         {
 460                                 // Prefix match (with case-insensitive match)
 461                                 for( j = 0; gsItemPattern[j]; j ++ )
 462                                 {
 463                                         if( gaItems[i].Desc[j] == gsItemPattern[j] )
 464                                                 continue;
 465                                         if( tolower(gaItems[i].Desc[j]) == tolower(gsItemPattern[j]) )
 466                                                 continue;
 467                                         break;
 468                                 }
 469                                 // Check if the prefix matched
 470                                 if( gsItemPattern[j] != '\0' )
 471                                         continue;
 472
 473                                 // Prefect match
 474                                 if( gaItems[i].Desc[j] == '\0' ) {
 475                                         best = i;
 476                                         break;
 477                                 }
 478
 479                                 // Only one match allowed
 480                                 if( best == -1 ) {
 481                                         best = i;
 482                                 }
 483                                 else {
 484                                         // TODO: Allow ambiguous matches?
 485                                         // or just print a wanrning
 486                                         printf("Warning - Ambiguous pattern, stopping\n");
 487                                         return 1;
 488                                 }
 489                         }
 490
 491                         // Was a match found?
 492                         if( best == -1 )
 493                         {
 494                                 fprintf(stderr, "No item matches the passed string\n");
 495                                 return 1;
 496                         }
 497
 498                         i = best;
 499                 }
 500         }
 501         else if( giUIMode != UI_MODE_BASIC )
 502         {
 503                 i = ShowNCursesUI();
 504         }
 505         else
 506         {
 507                 // Very basic dispense interface
 508                 for( i = 0; i < giNumItems; i ++ ) {
 509                         // Add a separator
 510                         if( i && strcmp(gaItems[i].Type, gaItems[i-1].Type) != 0 )
 511                                 printf("   ---\n");
 512
 513                         printf("%2i %s:%i\t%3i %s\n", i, gaItems[i].Type, gaItems[i].ID,
 514                                 gaItems[i].Price, gaItems[i].Desc);
 515                 }
 516                 printf(" q Quit\n");
 517                 for(;;)
 518                 {
 519                         char    *buf;
 520
 521                         i = -1;
 522
 523                         fgets(buffer, BUFSIZ, stdin);
 524
 525                         buf = trim(buffer);
 526
 527                         if( buf[0] == 'q' )     break;
 528
 529                         i = atoi(buf);
 530
 531                         if( i != 0 || buf[0] == '0' )
 532                         {
 533                                 if( i < 0 || i >= giNumItems ) {
 534                                         printf("Bad item %i (should be between 0 and %i)\n", i, giNumItems);
 535                                         continue;
 536                                 }
 537                                 break;
 538                         }
 539                 }
 540         }
 541
 542
 543         // Check for a valid item ID
 544         if( i >= 0 )
 545         {
 546                 // Connect, Authenticate, dispense and close
 547                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 548                 if( sock < 0 )  return -1;
 549
 550                 Dispense_ItemInfo(sock, gaItems[i].Type, gaItems[i].ID);
 551
 552                 Authenticate(sock);
 553                 ret = DispenseItem(sock, gaItems[i].Type, gaItems[i].ID);
 554                 close(sock);
 555         }
 556
 557         return ret;
 558 }
 559
 560 void ShowUsage(void)
 561 {
 562         printf(
 563                 "Usage:\n"
 564                 "  == Everyone ==\n"
 565                 "    dispense\n"
 566                 "        Show interactive list\n"
 567                 "    dispense <name>|<index>|<itemid>\n"
 568                 "        Dispense named item (<name> matches if it is a unique prefix)\n"
 569                 "    dispense give <user> <ammount> \"<reason>\"\n"
 570                 "        Give money to another user\n"
 571                 "    dispense donate <ammount> \"<reason>\"\n"
 572                 "        Donate to the club\n"
 573                 "    dispense iteminfo <type>:<id>\n"
 574                 "        Get the name and price for an item\n"
 575                 "  == Coke members == \n"
 576                 "    dispense acct [<user>]\n"
 577                 "        Show user balances\n"
 578                 "    dispense acct <user> [+-]<ammount> \"<reason>\"\n"
 579                 "        Alter a account value\n"
 580                 "  == Dispense administrators ==\n"
 581                 "    dispense acct <user> =<ammount> \"<reason>\"\n"
 582                 "        Set an account balance\n"
 583                 "    dispense user add <user>\n"
 584                 "        Create new coke account (Admins only)\n"
 585                 "    dispense user type <user> <flags>\n"
 586                 "        Alter a user's flags\n"
 587                 "        <flags> is a comma-separated list of user, coke, admin or disabled\n"
 588                 "        Flags are removed by preceding the name with '-' or '!'\n"
 589                 "\n"
 590                 "General Options:\n"
 591                 "    -u <username>\n"
 592                 "        Set a different user (Coke members only)\n"
 593                 "    -h / -?\n"
 594                 "        Show help text\n"
 595                 "    -G\n"
 596                 "        Use alternate GUI\n"
 597                 "    -m <min balance>\n"
 598                 "    -M <max balance>\n"
 599                 "        Set the Maximum/Minimum balances shown in `dispense acct`\n"
 600                 );
 601 }
 602
 603 // -------------------
 604 // --- NCurses GUI ---
 605 // -------------------
 606 /**
 607  * \brief Render the NCurses UI
 608  */
 609 int ShowNCursesUI(void)
 610 {
 611         // TODO: ncurses interface (with separation between item classes)
 612         // - Hmm... that would require standardising the item ID to be <class>:<index>
 613         // Oh, why not :)
 614          int    ch;
 615          int    i, times;
 616          int    xBase, yBase;
 617         const int       displayMinWidth = 40;
 618         char    *titleString = "Dispense";
 619          int    itemCount;
 620          int    maxItemIndex;
 621          int    itemBase = 0;
 622          int    currentItem;
 623          int    ret = -2;       // -2: Used for marking "no return yet"
 624
 625         char    balance_str[5+1+2+1];   // If $9999.99 is too little, something's wrong
 626         char    *username;
 627         struct passwd *pwd;
 628
 629          int    height, width;
 630
 631         // Get Username
 632         if( gsEffectiveUser )
 633                 username = gsEffectiveUser;
 634         else {
 635                 pwd = getpwuid( getuid() );
 636                 username = pwd->pw_name;
 637         }
 638         // Get balance
 639         snprintf(balance_str, sizeof balance_str, "$%i.%02i", giUserBalance/100, giUserBalance%100);
 640
 641         // Enter curses mode
 642         initscr();
 643         raw(); noecho();
 644
 645         // Get max index
 646         maxItemIndex = ShowItemAt(0, 0, 0, -1, 0);
 647         // Get item count per screen
 648         // - 6: randomly chosen (Need at least 3)
 649         itemCount = LINES - 6;
 650         if( itemCount > maxItemIndex )
 651                 itemCount = maxItemIndex;
 652         // Get first index
 653         currentItem = 0;
 654         while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
 655                 currentItem ++;
 656
 657
 658         // Get dimensions
 659         height = itemCount + 3;
 660         width = displayMinWidth;
 661
 662         // Get positions
 663         xBase = COLS/2 - width/2;
 664         yBase = LINES/2 - height/2;
 665
 666         for( ;; )
 667         {
 668                 // Header
 669                 PrintAlign(yBase, xBase, width, "/", '-', titleString, '-', "\\");
 670
 671                 // Items
 672                 for( i = 0; i < itemCount; i ++ )
 673                 {
 674                          int    pos = 0;
 675
 676                         move( yBase + 1 + i, xBase );
 677                         printw("| ");
 678
 679                         pos += 2;
 680
 681                         // Check for the '...' row
 682                         // - Oh god, magic numbers!
 683                         if( (i == 0 && itemBase > 0)
 684                          || (i == itemCount - 1 && itemBase < maxItemIndex - itemCount) )
 685                         {
 686                                 printw("     ...");     pos += 8;
 687                                 times = (width - pos) - 1;
 688                                 while(times--)  addch(' ');
 689                         }
 690                         // Show an item
 691                         else {
 692                                 ShowItemAt(
 693                                         yBase + 1 + i, xBase + pos,     // Position
 694                                         (width - pos) - 3,      // Width
 695                                         itemBase + i,   // Index
 696                                         !!(currentItem == itemBase + i) // Hilighted
 697                                         );
 698                                 printw("  ");
 699                         }
 700
 701                         // Scrollbar (if needed)
 702                         if( maxItemIndex > itemCount ) {
 703                                 if( i == 0 ) {
 704                                         addch('A');
 705                                 }
 706                                 else if( i == itemCount - 1 ) {
 707                                         addch('V');
 708                                 }
 709                                 else {
 710                                          int    percentage = itemBase * 100 / (maxItemIndex-itemCount);
 711                                         if( i-1 == percentage*(itemCount-3)/100 ) {
 712                                                 addch('#');
 713                                         }
 714                                         else {
 715                                                 addch('|');
 716                                         }
 717                                 }
 718                         }
 719                         else {
 720                                 addch('|');
 721                         }
 722                 }
 723
 724                 // Footer
 725                 PrintAlign(yBase+height-2, xBase, width, "\\", '-', "", '-', "/");
 726
 727                 // User line
 728                 // - Username, balance, flags
 729                 PrintAlign(yBase+height-1, xBase+1, width-2,
 730                         username, ' ', balance_str, ' ', gsUserFlags);
 731
 732
 733                 // Get input
 734                 ch = getch();
 735
 736                 if( ch == '\x1B' ) {
 737                         ch = getch();
 738                         if( ch == '[' ) {
 739                                 ch = getch();
 740
 741                                 switch(ch)
 742                                 {
 743                                 case 'B':
 744                                         currentItem ++;
 745                                         // Skip over spacers
 746                                         while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
 747                                                 currentItem ++;
 748
 749                                         if( currentItem >= maxItemIndex ) {
 750                                                 currentItem = 0;
 751                                                 // Skip over spacers
 752                                                 while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
 753                                                         currentItem ++;
 754                                         }
 755                                         break;
 756                                 case 'A':
 757                                         currentItem --;
 758                                         // Skip over spacers
 759                                         while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
 760                                                 currentItem --;
 761
 762                                         if( currentItem < 0 ) {
 763                                                 currentItem = maxItemIndex - 1;
 764                                                 // Skip over spacers
 765                                                 while( ShowItemAt(0, 0, 0, currentItem, 0) == -1 )
 766                                                         currentItem --;
 767                                         }
 768                                         break;
 769                                 }
 770                         }
 771                         else {
 772
 773                         }
 774
 775                         if( itemCount > maxItemIndex && currentItem < itemBase + 2 && itemBase > 0 )
 776                                 itemBase = currentItem - 2;
 777                         if( itemCount > maxItemIndex && currentItem > itemBase + itemCount - 2 && itemBase < maxItemIndex-1 )
 778                                 itemBase = currentItem - itemCount + 2;
 779                 }
 780                 else {
 781                         switch(ch)
 782                         {
 783                         case '\n':
 784                                 ret = ShowItemAt(0, 0, 0, currentItem, 0);
 785                                 break;
 786                         case 'q':
 787                                 ret = -1;       // -1: Return with no dispense
 788                                 break;
 789                         }
 790
 791                         // Check if the return value was changed
 792                         if( ret != -2 ) break;
 793                 }
 794
 795         }
 796
 797
 798         // Leave
 799         endwin();
 800         return ret;
 801 }
 802
 803 /**
 804  * \brief Show item \a Index at (\a Col, \a Row)
 805  * \return Dispense index of item
 806  * \note Part of the NCurses UI
 807  */
 808 int ShowItemAt(int Row, int Col, int Width, int Index, int bHilighted)
 809 {
 810          int    _x, _y, times;
 811         char    *name = NULL;
 812          int    price = 0;
 813          int    status = -1;
 814
 815         switch(giUIMode)
 816         {
 817         // Standard UI
 818         // - This assumes that
 819         case UI_MODE_STANDARD:
 820                 // Bounds check
 821                 // Index = -1, request limit
 822                 if( Index < 0 || Index >= giNumItems+2 )
 823                         return giNumItems+2;
 824                 // Drink label
 825                 if( Index == 0 )
 826                 {
 827                         price = 0;
 828                         name = "Coke Machine";
 829                         Index = -1;     // -1 indicates a label
 830                         break;
 831                 }
 832                 Index --;
 833                 // Drinks 0 - 6
 834                 if( Index <= 6 )
 835                 {
 836                         name = gaItems[Index].Desc;
 837                         price = gaItems[Index].Price;
 838                         status = gaItems[Index].Status;
 839                         break;
 840                 }
 841                 Index -= 7;
 842                 // EPS label
 843                 if( Index == 0 )
 844                 {
 845                         price = 0;
 846                         name = "Electronic Payment System";
 847                         Index = -1;     // -1 indicates a label
 848                         break;
 849                 }
 850                 Index --;
 851                 Index += 7;
 852                 name = gaItems[Index].Desc;
 853                 price = gaItems[Index].Price;
 854                 status = gaItems[Index].Status;
 855                 break;
 856         default:
 857                 return -1;
 858         }
 859
 860         // Width = 0, don't print
 861         if( Width > 0 )
 862         {
 863                 move( Row, Col );
 864
 865                 if( Index >= 0 )
 866                 {
 867                         // Show hilight and status
 868                         switch( status )
 869                         {
 870                         case 0:
 871                                 if( bHilighted )
 872                                         printw("-> ");
 873                                 else
 874                                         printw("   ");
 875                                 break;
 876                         case 1:
 877                                 printw("SLD");
 878                                 break;
 879
 880                         default:
 881                         case -1:
 882                                 printw("ERR");
 883                                 break;
 884                         }
 885
 886                         printw(" %s", name);
 887
 888                         getyx(stdscr, _y, _x);
 889                         // Assumes max 4 digit prices
 890                         times = Width - 5 - (_x - Col); // TODO: Better handling for large prices
 891                         while(times--)  addch(' ');
 892
 893                         printw(" %4i", price);
 894                 }
 895                 else
 896                 {
 897                         printw("-- %s", name);
 898                         getyx(stdscr, _y, _x);
 899                         times = Width - 4 - (_x - Col);
 900                         while(times--)  addch(' ');
 901                         printw("    ");
 902                 }
 903         }
 904
 905         // If the item isn't availiable for sale, return -1 (so it's skipped)
 906         if( status )
 907                 Index = -1;
 908
 909         return Index;
 910 }
 911
 912 /**
 913  * \brief Print a three-part string at the specified position (formatted)
 914  * \note NCurses UI Helper
 915  *
 916  * Prints \a Left on the left of the area, \a Right on the righthand side
 917  * and \a Mid in the middle of the area. These are padded with \a Pad1
 918  * between \a Left and \a Mid, and \a Pad2 between \a Mid and \a Right.
 919  *
 920  * ::printf style format codes are allowed in \a Left, \a Mid and \a Right,
 921  * and the arguments to these are read in that order.
 922  */
 923 void PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1,
 924         const char *Mid, char Pad2, const char *Right, ...)
 925 {
 926          int    lLen, mLen, rLen;
 927          int    times;
 928
 929         va_list args;
 930
 931         // Get the length of the strings
 932         va_start(args, Right);
 933         lLen = vsnprintf(NULL, 0, Left, args);
 934         mLen = vsnprintf(NULL, 0, Mid, args);
 935         rLen = vsnprintf(NULL, 0, Right, args);
 936         va_end(args);
 937
 938         // Sanity check
 939         if( lLen + mLen/2 > Width/2 || mLen/2 + rLen > Width/2 ) {
 940                 return ;        // TODO: What to do?
 941         }
 942
 943         move(Row, Col);
 944
 945         // Render strings
 946         va_start(args, Right);
 947         // - Left
 948         {
 949                 char    tmp[lLen+1];
 950                 vsnprintf(tmp, lLen+1, Left, args);
 951                 addstr(tmp);
 952         }
 953         // - Left padding
 954         times = (Width - mLen)/2 - lLen;
 955         while(times--)  addch(Pad1);
 956         // - Middle
 957         {
 958                 char    tmp[mLen+1];
 959                 vsnprintf(tmp, mLen+1, Mid, args);
 960                 addstr(tmp);
 961         }
 962         // - Right Padding
 963         times = (Width - mLen)/2 - rLen;
 964         if( (Width - mLen) % 2 )        times ++;
 965         while(times--)  addch(Pad2);
 966         // - Right
 967         {
 968                 char    tmp[rLen+1];
 969                 vsnprintf(tmp, rLen+1, Right, args);
 970                 addstr(tmp);
 971         }
 972 }
 973
 974 // ---------------------
 975 // --- Coke Protocol ---
 976 // ---------------------
 977 int OpenConnection(const char *Host, int Port)
 978 {
 979         struct hostent  *host;
 980         struct sockaddr_in      serverAddr;
 981          int    sock;
 982
 983         host = gethostbyname(Host);
 984         if( !host ) {
 985                 fprintf(stderr, "Unable to look up '%s'\n", Host);
 986                 return -1;
 987         }
 988
 989         memset(&serverAddr, 0, sizeof(serverAddr));
 990
 991         serverAddr.sin_family = AF_INET;        // IPv4
 992         // NOTE: I have a suspicion that IPv6 will play sillybuggers with this :)
 993         serverAddr.sin_addr.s_addr = *((unsigned long *) host->h_addr_list[0]);
 994         serverAddr.sin_port = htons(Port);
 995
 996         sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 997         if( sock < 0 ) {
 998                 fprintf(stderr, "Failed to create socket\n");
 999                 return -1;
1000         }
1001
1002 //      printf("geteuid() = %i, getuid() = %i\n", geteuid(), getuid());
1003
1004         if( geteuid() == 0 || getuid() == 0 )
1005         {
1006                  int    i;
1007                 struct sockaddr_in      localAddr;
1008                 memset(&localAddr, 0, sizeof(localAddr));
1009                 localAddr.sin_family = AF_INET; // IPv4
1010
1011                 // Loop through all the top ports until one is avaliable
1012                 for( i = 512; i < 1024; i ++)
1013                 {
1014                         localAddr.sin_port = htons(i);  // IPv4
1015                         // Attempt to bind to low port for autoauth
1016                         if( bind(sock, (struct sockaddr*)&localAddr, sizeof(localAddr)) == 0 )
1017                                 break;
1018                 }
1019                 if( i == 1024 )
1020                         printf("Warning: AUTOAUTH unavaliable\n");
1021 //              else
1022 //                      printf("Bound to 0.0.0.0:%i\n", i);
1023         }
1024
1025         if( connect(sock, (struct sockaddr *) &serverAddr, sizeof(serverAddr)) < 0 ) {
1026                 fprintf(stderr, "Failed to connect to server\n");
1027                 return -1;
1028         }
1029
1030         return sock;
1031 }
1032
1033 /**
1034  * \brief Authenticate with the server
1035  * \return Boolean Failure
1036  */
1037 int Authenticate(int Socket)
1038 {
1039         struct passwd   *pwd;
1040         char    *buf;
1041          int    responseCode;
1042         char    salt[32];
1043          int    i;
1044         regmatch_t      matches[4];
1045
1046         if( gbIsAuthenticated ) return 0;
1047
1048         // Get user name
1049         pwd = getpwuid( getuid() );
1050
1051         // Attempt automatic authentication
1052         sendf(Socket, "AUTOAUTH %s\n", pwd->pw_name);
1053
1054         // Check if it worked
1055         buf = ReadLine(Socket);
1056
1057         responseCode = atoi(buf);
1058         switch( responseCode )
1059         {
1060         case 200:       // Autoauth succeeded, return
1061                 free(buf);
1062                 break;
1063
1064         case 401:       // Untrusted, attempt password authentication
1065                 free(buf);
1066
1067                 sendf(Socket, "USER %s\n", pwd->pw_name);
1068                 printf("Using username %s\n", pwd->pw_name);
1069
1070                 buf = ReadLine(Socket);
1071
1072                 // TODO: Get Salt
1073                 // Expected format: 100 SALT <something> ...
1074                 // OR             : 100 User Set
1075                 RunRegex(&gSaltRegex, buf, 4, matches, "Malformed server response");
1076                 responseCode = atoi(buf);
1077                 if( responseCode != 100 ) {
1078                         fprintf(stderr, "Unknown repsonse code %i from server\n%s\n", responseCode, buf);
1079                         free(buf);
1080                         return -1;      // ERROR
1081                 }
1082
1083                 // Check for salt
1084                 if( memcmp( buf+matches[2].rm_so, "SALT", matches[2].rm_eo - matches[2].rm_so) == 0) {
1085                         // Store it for later
1086                         memcpy( salt, buf + matches[3].rm_so, matches[3].rm_eo - matches[3].rm_so );
1087                         salt[ matches[3].rm_eo - matches[3].rm_so ] = 0;
1088                 }
1089                 free(buf);
1090
1091                 // Give three attempts
1092                 for( i = 0; i < 3; i ++ )
1093                 {
1094                          int    ofs = strlen(pwd->pw_name)+strlen(salt);
1095                         char    tmpBuf[42];
1096                         char    tmp[ofs+20];
1097                         char    *pass = getpass("Password: ");
1098                         uint8_t h[20];
1099
1100                         // Create hash string
1101                         // <username><salt><hash>
1102                         strcpy(tmp, pwd->pw_name);
1103                         strcat(tmp, salt);
1104                         SHA1( (unsigned char*)pass, strlen(pass), h );
1105                         memcpy(tmp+ofs, h, 20);
1106
1107                         // Hash all that
1108                         SHA1( (unsigned char*)tmp, ofs+20, h );
1109                         sprintf(tmpBuf, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
1110                                 h[ 0], h[ 1], h[ 2], h[ 3], h[ 4], h[ 5], h[ 6], h[ 7], h[ 8], h[ 9],
1111                                 h[10], h[11], h[12], h[13], h[14], h[15], h[16], h[17], h[18], h[19]
1112                                 );
1113
1114                         // Send password
1115                         sendf(Socket, "PASS %s\n", tmpBuf);
1116                         buf = ReadLine(Socket);
1117
1118                         responseCode = atoi(buf);
1119                         // Auth OK?
1120                         if( responseCode == 200 )       break;
1121                         // Bad username/password
1122                         if( responseCode == 401 )       continue;
1123
1124                         fprintf(stderr, "Unknown repsonse code %i from server\n%s\n", responseCode, buf);
1125                         free(buf);
1126                         return -1;
1127                 }
1128                 free(buf);
1129                 if( i == 3 )
1130                         return 2;       // 2 = Bad Password
1131                 break;
1132
1133         case 404:       // Bad Username
1134                 fprintf(stderr, "Bad Username '%s'\n", pwd->pw_name);
1135                 free(buf);
1136                 return 1;
1137
1138         default:
1139                 fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1140                 printf("%s\n", buf);
1141                 free(buf);
1142                 return -1;
1143         }
1144
1145         // Set effective user
1146         if( gsEffectiveUser ) {
1147                 sendf(Socket, "SETEUSER %s\n", gsEffectiveUser);
1148
1149                 buf = ReadLine(Socket);
1150                 responseCode = atoi(buf);
1151
1152                 switch(responseCode)
1153                 {
1154                 case 200:
1155                         printf("Running as '%s' by '%s'\n", gsEffectiveUser, pwd->pw_name);
1156                         break;
1157
1158                 case 403:
1159                         printf("Only coke members can use `dispense -u`\n");
1160                         free(buf);
1161                         return -1;
1162
1163                 case 404:
1164                         printf("Invalid user selected\n");
1165                         free(buf);
1166                         return -1;
1167
1168                 default:
1169                         fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1170                         printf("%s\n", buf);
1171                         free(buf);
1172                         exit(-1);
1173                 }
1174
1175                 free(buf);
1176         }
1177
1178         gbIsAuthenticated = 1;
1179
1180         return 0;
1181 }
1182
1183 int GetUserBalance(int Socket)
1184 {
1185         regmatch_t      matches[6];
1186         struct passwd   *pwd;
1187         char    *buf;
1188          int    responseCode;
1189
1190         if( !gsUserName )
1191         {
1192                 if( gsEffectiveUser ) {
1193                         gsUserName = gsEffectiveUser;
1194                 }
1195                 else {
1196                         pwd = getpwuid( getuid() );
1197                         gsUserName = strdup(pwd->pw_name);
1198                 }
1199         }
1200
1201         sendf(Socket, "USER_INFO %s\n", gsUserName);
1202         buf = ReadLine(Socket);
1203         responseCode = atoi(buf);
1204         switch(responseCode)
1205         {
1206         case 202:       break;  // Ok
1207
1208         case 404:
1209                 printf("Invalid user? (USER_INFO failed)\n");
1210                 free(buf);
1211                 return -1;
1212
1213         default:
1214                 fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1215                 printf("%s\n", buf);
1216                 free(buf);
1217                 exit(-1);
1218         }
1219
1220         RunRegex(&gUserInfoRegex, buf, 6, matches, "Malformed server response");
1221
1222         giUserBalance = atoi( buf + matches[4].rm_so );
1223         gsUserFlags = strdup( buf + matches[5].rm_so );
1224
1225         free(buf);
1226
1227         return 0;
1228 }
1229
1230 /**
1231  * \brief Read an item info response from the server
1232  * \param Dest  Destination for the read item (strings will be on the heap)
1233  */
1234 int ReadItemInfo(int Socket, tItem *Dest)
1235 {
1236         char    *buf;
1237          int    responseCode;
1238
1239         regmatch_t      matches[8];
1240         char    *statusStr;
1241
1242         // Get item info
1243         buf = ReadLine(Socket);
1244         responseCode = atoi(buf);
1245
1246         switch(responseCode)
1247         {
1248         case 202:       break;
1249
1250         case 406:
1251                 printf("Bad item name\n");
1252                 free(buf);
1253                 return 1;
1254
1255         default:
1256                 fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n%s", responseCode, buf);
1257                 exit(-1);
1258         }
1259
1260         RunRegex(&gItemRegex, buf, 8, matches, "Malformed server response");
1261
1262         buf[ matches[3].rm_eo ] = '\0';
1263         buf[ matches[5].rm_eo ] = '\0';
1264         buf[ matches[7].rm_eo ] = '\0';
1265
1266         statusStr = &buf[ matches[5].rm_so ];
1267
1268         Dest->ID = atoi( buf + matches[4].rm_so );
1269
1270         if( strcmp(statusStr, "avail") == 0 )
1271                 Dest->Status = 0;
1272         else if( strcmp(statusStr, "sold") == 0 )
1273                 Dest->Status = 1;
1274         else if( strcmp(statusStr, "error") == 0 )
1275                 Dest->Status = -1;
1276         else {
1277                 fprintf(stderr, "Unknown response from dispense server (status '%s')\n",
1278                         statusStr);
1279                 return 1;
1280         }
1281         Dest->Price = atoi( buf + matches[6].rm_so );
1282
1283         // Hack a little to reduce heap fragmentation
1284         {
1285                 char    tmpType[strlen(buf + matches[3].rm_so) + 1];
1286                 char    tmpDesc[strlen(buf + matches[7].rm_so) + 1];
1287                 strcpy(tmpType, buf + matches[3].rm_so);
1288                 strcpy(tmpDesc, buf + matches[7].rm_so);
1289                 free(buf);
1290                 Dest->Type = strdup( tmpType );
1291                 Dest->Desc = strdup( tmpDesc );
1292         }
1293
1294         return 0;
1295 }
1296
1297 /**
1298  * \brief Fill the item information structure
1299  * \return Boolean Failure
1300  */
1301 void PopulateItemList(int Socket)
1302 {
1303         char    *buf;
1304          int    responseCode;
1305
1306         char    *itemType, *itemStart;
1307          int    count, i;
1308         regmatch_t      matches[4];
1309
1310         // Ask server for stock list
1311         send(Socket, "ENUM_ITEMS\n", 11, 0);
1312         buf = ReadLine(Socket);
1313
1314         //printf("Output: %s\n", buf);
1315
1316         responseCode = atoi(buf);
1317         if( responseCode != 201 ) {
1318                 fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n", responseCode);
1319                 exit(-1);
1320         }
1321
1322         // - Get item list -
1323
1324         // Expected format:
1325         //  201 Items <count>
1326         //  202 Item <count>
1327         RunRegex(&gArrayRegex, buf, 4, matches, "Malformed server response");
1328
1329         itemType = &buf[ matches[2].rm_so ];    buf[ matches[2].rm_eo ] = '\0';
1330         count = atoi( &buf[ matches[3].rm_so ] );
1331
1332         // Check array type
1333         if( strcmp(itemType, "Items") != 0 ) {
1334                 // What the?!
1335                 fprintf(stderr, "Unexpected array type, expected 'Items', got '%s'\n",
1336                         itemType);
1337                 exit(-1);
1338         }
1339
1340         itemStart = &buf[ matches[3].rm_eo ];
1341
1342         free(buf);
1343
1344         giNumItems = count;
1345         gaItems = malloc( giNumItems * sizeof(tItem) );
1346
1347         // Fetch item information
1348         for( i = 0; i < giNumItems; i ++ )
1349         {
1350                 ReadItemInfo( Socket, &gaItems[i] );
1351         }
1352
1353         // Read end of list
1354         buf = ReadLine(Socket);
1355         responseCode = atoi(buf);
1356
1357         if( responseCode != 200 ) {
1358                 fprintf(stderr, "Unknown response from dispense server %i\n'%s'",
1359                         responseCode, buf
1360                         );
1361                 exit(-1);
1362         }
1363
1364         free(buf);
1365 }
1366
1367
1368 /**
1369  * \brief Get information on an item
1370  * \return Boolean Failure
1371  */
1372 int Dispense_ItemInfo(int Socket, const char *Type, int ID)
1373 {
1374         tItem   item;
1375
1376         // Query
1377         sendf(Socket, "ITEM_INFO %s:%i\n", Type, ID);
1378
1379         if( ReadItemInfo(Socket, &item) )
1380         {
1381                 return -1;
1382         }
1383
1384         printf("%8s:%-2i %2i.%02i %s\n",
1385                 item.Type, item.ID,
1386                 item.Price/100, item.Price%100,
1387                 item.Desc);
1388
1389         free(item.Type);
1390         free(item.Desc);
1391
1392         return 0;
1393 }
1394
1395 /**
1396  * \brief Dispense an item
1397  * \return Boolean Failure
1398  */
1399 int DispenseItem(int Socket, const char *Type, int ID)
1400 {
1401          int    ret, responseCode;
1402         char    *buf;
1403
1404         // Check for a dry run
1405         if( gbDryRun ) {
1406                 printf("Dry Run - No action\n");
1407                 return 0;
1408         }
1409
1410         // Dispense!
1411         sendf(Socket, "DISPENSE %s:%i\n", Type, ID);
1412         buf = ReadLine(Socket);
1413
1414         responseCode = atoi(buf);
1415         switch( responseCode )
1416         {
1417         case 200:
1418                 printf("Dispense OK\n");
1419                 ret = 0;
1420                 break;
1421         case 401:
1422                 printf("Not authenticated\n");
1423                 ret = 1;
1424                 break;
1425         case 402:
1426                 printf("Insufficient balance\n");
1427                 ret = 1;
1428                 break;
1429         case 406:
1430                 printf("Bad item name\n");
1431                 ret = 1;
1432                 break;
1433         case 500:
1434                 printf("Item failed to dispense, is the slot empty?\n");
1435                 ret = 1;
1436                 break;
1437         case 501:
1438                 printf("Dispense not possible (slot empty/permissions)\n");
1439                 ret = 1;
1440                 break;
1441         default:
1442                 printf("Unknown response code %i ('%s')\n", responseCode, buf);
1443                 ret = -2;
1444                 break;
1445         }
1446
1447         free(buf);
1448         return ret;
1449 }
1450
1451 /**
1452  * \brief Alter a user's balance
1453  */
1454 int Dispense_AlterBalance(int Socket, const char *Username, int Ammount, const char *Reason)
1455 {
1456         char    *buf;
1457          int    responseCode;
1458
1459         // Check for a dry run
1460         if( gbDryRun ) {
1461                 printf("Dry Run - No action\n");
1462                 return 0;
1463         }
1464
1465         sendf(Socket, "ADD %s %i %s\n", Username, Ammount, Reason);
1466         buf = ReadLine(Socket);
1467
1468         responseCode = atoi(buf);
1469         free(buf);
1470
1471         switch(responseCode)
1472         {
1473         case 200:       return 0;       // OK
1474         case 402:
1475                 fprintf(stderr, "Insufficient balance\n");
1476                 return 1;
1477         case 403:       // Not in coke
1478                 fprintf(stderr, "You are not in coke (sucker)\n");
1479                 return 1;
1480         case 404:       // Unknown user
1481                 fprintf(stderr, "Unknown user '%s'\n", Username);
1482                 return 2;
1483         default:
1484                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1485                 return -1;
1486         }
1487
1488         return -1;
1489 }
1490
1491 /**
1492  * \brief Set a user's balance
1493  * \note Only avaliable to dispense admins
1494  */
1495 int Dispense_SetBalance(int Socket, const char *Username, int Balance, const char *Reason)
1496 {
1497         char    *buf;
1498          int    responseCode;
1499
1500         // Check for a dry run
1501         if( gbDryRun ) {
1502                 printf("Dry Run - No action\n");
1503                 return 0;
1504         }
1505
1506         sendf(Socket, "SET %s %i %s\n", Username, Balance, Reason);
1507         buf = ReadLine(Socket);
1508
1509         responseCode = atoi(buf);
1510         free(buf);
1511
1512         switch(responseCode)
1513         {
1514         case 200:       return 0;       // OK
1515         case 403:       // Not in coke
1516                 fprintf(stderr, "You are not an admin\n");
1517                 return 1;
1518         case 404:       // Unknown user
1519                 fprintf(stderr, "Unknown user '%s'\n", Username);
1520                 return 2;
1521         default:
1522                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1523                 return -1;
1524         }
1525
1526         return -1;
1527 }
1528
1529 /**
1530  * \brief Give money to another user
1531  */
1532 int Dispense_Give(int Socket, const char *Username, int Ammount, const char *Reason)
1533 {
1534         char    *buf;
1535          int    responseCode;
1536
1537         if( Ammount < 0 ) {
1538                 printf("Sorry, you can only give, you can't take.\n");
1539                 return -1;
1540         }
1541
1542         // Fast return on zero
1543         if( Ammount == 0 ) {
1544                 printf("Are you actually going to give any?\n");
1545                 return 0;
1546         }
1547
1548         // Check for a dry run
1549         if( gbDryRun ) {
1550                 printf("Dry Run - No action\n");
1551                 return 0;
1552         }
1553
1554         sendf(Socket, "GIVE %s %i %s\n", Username, Ammount, Reason);
1555         buf = ReadLine(Socket);
1556
1557         responseCode = atoi(buf);
1558         free(buf);
1559
1560         switch(responseCode)
1561         {
1562         case 200:
1563                 printf("Give succeeded\n");
1564                 return 0;       // OK
1565
1566         case 402:
1567                 fprintf(stderr, "Insufficient balance\n");
1568                 return 1;
1569
1570         case 404:       // Unknown user
1571                 fprintf(stderr, "Unknown user '%s'\n", Username);
1572                 return 2;
1573
1574         default:
1575                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1576                 return -1;
1577         }
1578
1579         return -1;
1580 }
1581
1582
1583 /**
1584  * \brief Donate money to the club
1585  */
1586 int Dispense_Donate(int Socket, int Ammount, const char *Reason)
1587 {
1588         char    *buf;
1589          int    responseCode;
1590
1591         if( Ammount < 0 ) {
1592                 printf("Sorry, you can only give, you can't take.\n");
1593                 return -1;
1594         }
1595
1596         // Fast return on zero
1597         if( Ammount == 0 ) {
1598                 printf("Are you actually going to give any?\n");
1599                 return 0;
1600         }
1601
1602         // Check for a dry run
1603         if( gbDryRun ) {
1604                 printf("Dry Run - No action\n");
1605                 return 0;
1606         }
1607
1608         sendf(Socket, "DONATE %i %s\n", Ammount, Reason);
1609         buf = ReadLine(Socket);
1610
1611         responseCode = atoi(buf);
1612         free(buf);
1613
1614         switch(responseCode)
1615         {
1616         case 200:       return 0;       // OK
1617
1618         case 402:
1619                 fprintf(stderr, "Insufficient balance\n");
1620                 return 1;
1621
1622         default:
1623                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1624                 return -1;
1625         }
1626
1627         return -1;
1628 }
1629
1630 /**
1631  * \brief Enumerate users
1632  */
1633 int Dispense_EnumUsers(int Socket)
1634 {
1635         char    *buf;
1636          int    responseCode;
1637          int    nUsers;
1638         regmatch_t      matches[4];
1639
1640         if( giMinimumBalance != INT_MIN ) {
1641                 if( giMaximumBalance != INT_MAX ) {
1642                         sendf(Socket, "ENUM_USERS min_balance:%i max_balance:%i\n", giMinimumBalance, giMaximumBalance);
1643                 }
1644                 else {
1645                         sendf(Socket, "ENUM_USERS min_balance:%i\n", giMinimumBalance);
1646                 }
1647         }
1648         else {
1649                 if( giMaximumBalance != INT_MAX ) {
1650                         sendf(Socket, "ENUM_USERS max_balance:%i\n", giMaximumBalance);
1651                 }
1652                 else {
1653                         sendf(Socket, "ENUM_USERS\n");
1654                 }
1655         }
1656         buf = ReadLine(Socket);
1657         responseCode = atoi(buf);
1658
1659         switch(responseCode)
1660         {
1661         case 201:       break;  // Ok, length follows
1662
1663         default:
1664                 fprintf(stderr, "Unknown response code %i\n%s\n", responseCode, buf);
1665                 free(buf);
1666                 return -1;
1667         }
1668
1669         // Get count (not actually used)
1670         RunRegex(&gArrayRegex, buf, 4, matches, "Malformed server response");
1671         nUsers = atoi( buf + matches[3].rm_so );
1672         printf("%i users returned\n", nUsers);
1673
1674         // Free string
1675         free(buf);
1676
1677         // Read returned users
1678         do {
1679                 buf = ReadLine(Socket);
1680                 responseCode = atoi(buf);
1681
1682                 if( responseCode != 202 )       break;
1683
1684                 _PrintUserLine(buf);
1685                 free(buf);
1686         } while(responseCode == 202);
1687
1688         // Check final response
1689         if( responseCode != 200 ) {
1690                 fprintf(stderr, "Unknown response code %i\n%s\n", responseCode, buf);
1691                 free(buf);
1692                 return -1;
1693         }
1694
1695         free(buf);
1696
1697         return 0;
1698 }
1699
1700 int Dispense_ShowUser(int Socket, const char *Username)
1701 {
1702         char    *buf;
1703          int    responseCode, ret;
1704
1705         sendf(Socket, "USER_INFO %s\n", Username);
1706         buf = ReadLine(Socket);
1707
1708         responseCode = atoi(buf);
1709
1710         switch(responseCode)
1711         {
1712         case 202:
1713                 _PrintUserLine(buf);
1714                 ret = 0;
1715                 break;
1716
1717         case 404:
1718                 printf("Unknown user '%s'\n", Username);
1719                 ret = 1;
1720                 break;
1721
1722         default:
1723                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
1724                 ret = -1;
1725                 break;
1726         }
1727
1728         free(buf);
1729
1730         return ret;
1731 }
1732
1733 void _PrintUserLine(const char *Line)
1734 {
1735         regmatch_t      matches[6];
1736          int    bal;
1737
1738         RunRegex(&gUserInfoRegex, Line, 6, matches, "Malformed server response");
1739         // 3: Username
1740         // 4: Balance
1741         // 5: Flags
1742         {
1743                  int    usernameLen = matches[3].rm_eo - matches[3].rm_so;
1744                 char    username[usernameLen + 1];
1745                  int    flagsLen = matches[5].rm_eo - matches[5].rm_so;
1746                 char    flags[flagsLen + 1];
1747
1748                 memcpy(username, Line + matches[3].rm_so, usernameLen);
1749                 username[usernameLen] = '\0';
1750                 memcpy(flags, Line + matches[5].rm_so, flagsLen);
1751                 flags[flagsLen] = '\0';
1752
1753                 bal = atoi(Line + matches[4].rm_so);
1754                 printf("%-15s: $%4i.%02i (%s)\n", username, bal/100, abs(bal)%100, flags);
1755         }
1756 }
1757
1758 int Dispense_AddUser(int Socket, const char *Username)
1759 {
1760         char    *buf;
1761          int    responseCode, ret;
1762
1763         // Check for a dry run
1764         if( gbDryRun ) {
1765                 printf("Dry Run - No action\n");
1766                 return 0;
1767         }
1768
1769         sendf(Socket, "USER_ADD %s\n", Username);
1770
1771         buf = ReadLine(Socket);
1772         responseCode = atoi(buf);
1773
1774         switch(responseCode)
1775         {
1776         case 200:
1777                 printf("User '%s' added\n", Username);
1778                 ret = 0;
1779                 break;
1780
1781         case 403:
1782                 printf("Only wheel can add users\n");
1783                 ret = 1;
1784                 break;
1785
1786         case 404:
1787                 printf("User '%s' already exists\n", Username);
1788                 ret = 0;
1789                 break;
1790
1791         default:
1792                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
1793                 ret = -1;
1794                 break;
1795         }
1796
1797         free(buf);
1798
1799         return ret;
1800 }
1801
1802 int Dispense_SetUserType(int Socket, const char *Username, const char *TypeString)
1803 {
1804         char    *buf;
1805          int    responseCode, ret;
1806
1807         // Check for a dry run
1808         if( gbDryRun ) {
1809                 printf("Dry Run - No action\n");
1810                 return 0;
1811         }
1812
1813         // TODO: Pre-validate the string
1814
1815         sendf(Socket, "USER_FLAGS %s %s\n", Username, TypeString);
1816
1817         buf = ReadLine(Socket);
1818         responseCode = atoi(buf);
1819
1820         switch(responseCode)
1821         {
1822         case 200:
1823                 printf("User '%s' updated\n", Username);
1824                 ret = 0;
1825                 break;
1826
1827         case 403:
1828                 printf("Only wheel can modify users\n");
1829                 ret = 1;
1830                 break;
1831
1832         case 404:
1833                 printf("User '%s' does not exist\n", Username);
1834                 ret = 0;
1835                 break;
1836
1837         case 407:
1838                 printf("Flag string is invalid\n");
1839                 ret = 0;
1840                 break;
1841
1842         default:
1843                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
1844                 ret = -1;
1845                 break;
1846         }
1847
1848         free(buf);
1849
1850         return ret;
1851 }
1852
1853 // ---------------
1854 // --- Helpers ---
1855 // ---------------
1856 char *ReadLine(int Socket)
1857 {
1858         static char     buf[BUFSIZ];
1859         static int      bufPos = 0;
1860         static int      bufValid = 0;
1861          int    len;
1862         char    *newline = NULL;
1863          int    retLen = 0;
1864         char    *ret = malloc(10);
1865
1866         #if DEBUG_TRACE_SERVER
1867         printf("ReadLine: ");
1868         #endif
1869         fflush(stdout);
1870
1871         ret[0] = '\0';
1872
1873         while( !newline )
1874         {
1875                 if( bufValid ) {
1876                         len = bufValid;
1877                 }
1878                 else {
1879                         len = recv(Socket, buf+bufPos, BUFSIZ-1-bufPos, 0);
1880                         buf[bufPos+len] = '\0';
1881                 }
1882
1883                 newline = strchr( buf+bufPos, '\n' );
1884                 if( newline ) {
1885                         *newline = '\0';
1886                 }
1887
1888                 retLen += strlen(buf+bufPos);
1889                 ret = realloc(ret, retLen + 1);
1890                 strcat( ret, buf+bufPos );
1891
1892                 if( newline ) {
1893                          int    newLen = newline - (buf+bufPos) + 1;
1894                         bufValid = len - newLen;
1895                         bufPos += newLen;
1896                 }
1897                 if( len + bufPos == BUFSIZ - 1 )        bufPos = 0;
1898         }
1899
1900         #if DEBUG_TRACE_SERVER
1901         printf("%i '%s'\n", retLen, ret);
1902         #endif
1903
1904         return ret;
1905 }
1906
1907 int sendf(int Socket, const char *Format, ...)
1908 {
1909         va_list args;
1910          int    len;
1911
1912         va_start(args, Format);
1913         len = vsnprintf(NULL, 0, Format, args);
1914         va_end(args);
1915
1916         {
1917                 char    buf[len+1];
1918                 va_start(args, Format);
1919                 vsnprintf(buf, len+1, Format, args);
1920                 va_end(args);
1921
1922                 #if DEBUG_TRACE_SERVER
1923                 printf("sendf: %s", buf);
1924                 #endif
1925
1926                 return send(Socket, buf, len, 0);
1927         }
1928 }
1929
1930 char *trim(char *string)
1931 {
1932          int    i;
1933
1934         while( isspace(*string) )
1935                 string ++;
1936
1937         for( i = strlen(string); i--; )
1938         {
1939                 if( isspace(string[i]) )
1940                         string[i] = '\0';
1941                 else
1942                         break;
1943         }
1944
1945         return string;
1946 }
1947
1948 int RunRegex(regex_t *regex, const char *string, int nMatches, regmatch_t *matches, const char *errorMessage)
1949 {
1950          int    ret;
1951
1952         ret = regexec(regex, string, nMatches, matches, 0);
1953         if( ret && errorMessage ) {
1954                 size_t  len = regerror(ret, regex, NULL, 0);
1955                 char    errorStr[len];
1956                 regerror(ret, regex, errorStr, len);
1957                 printf("string = '%s'\n", string);
1958                 fprintf(stderr, "%s\n%s", errorMessage, errorStr);
1959                 exit(-1);
1960         }
1961
1962         return ret;
1963 }
1964
1965 void CompileRegex(regex_t *regex, const char *pattern, int flags)
1966 {
1967          int    ret = regcomp(regex, pattern, flags);
1968         if( ret ) {
1969                 size_t  len = regerror(ret, regex, NULL, 0);
1970                 char    errorStr[len];
1971                 regerror(ret, regex, errorStr, len);
1972                 fprintf(stderr, "Regex compilation failed - %s\n", errorStr);
1973                 exit(-1);
1974         }
1975 }