src/client/main.c

   1 /*
   2  * OpenDispense 2
   3  * UCC (University [of WA] Computer Club) Electronic Accounting System
   4  * - Dispense Client
   5  *
   6  * main.c - Core and Initialisation
   7  *
   8  * This file is licenced under the 3-clause BSD Licence. See the file
   9  * COPYING for full details.
  10  */
  11 #include <stdlib.h>
  12 #include <stdio.h>
  13 #include <string.h>
  14 #include <ctype.h>      // isspace
  15 #include <stdarg.h>
  16 #include <regex.h>
  17 #include <ncurses.h>
  18 #include <limits.h>
  19
  20 #include <unistd.h>     // close
  21 #include <netdb.h>      // gethostbyname
  22 #include <pwd.h>        // getpwuids
  23 #include <sys/socket.h>
  24 #include <netinet/in.h>
  25 #include <arpa/inet.h>
  26 #include <openssl/sha.h>        // SHA1
  27
  28 #define USE_NCURSES_INTERFACE   0
  29 #define DEBUG_TRACE_SERVER      0
  30 #define USE_AUTOAUTH    1
  31
  32 // === TYPES ===
  33 typedef struct sItem {
  34         char    *Type;
  35          int    ID;
  36         char    *Desc;
  37          int    Price;
  38 }       tItem;
  39
  40 // === PROTOTYPES ===
  41  int    main(int argc, char *argv[]);
  42 void    ShowUsage(void);
  43 // --- GUI ---
  44  int    ShowNCursesUI(void);
  45 void    ShowItemAt(int Row, int Col, int Width, int Index);
  46 void    PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1, const char *Mid, char Pad2, const char *Right, ...);
  47 // --- Coke Server Communication ---
  48  int    OpenConnection(const char *Host, int Port);
  49  int    Authenticate(int Socket);
  50  int    GetUserBalance(int Socket);
  51 void    PopulateItemList(int Socket);
  52  int    Dispense_ItemInfo(int Socket, const char *Type, int ID);
  53  int    DispenseItem(int Socket, const char *Type, int ID);
  54  int    Dispense_AlterBalance(int Socket, const char *Username, int Ammount, const char *Reason);
  55  int    Dispense_SetBalance(int Socket, const char *Username, int Balance, const char *Reason);
  56  int    Dispense_Give(int Socket, const char *Username, int Ammount, const char *Reason);
  57  int    Dispense_Donate(int Socket, int Ammount, const char *Reason);
  58  int    Dispense_EnumUsers(int Socket);
  59  int    Dispense_ShowUser(int Socket, const char *Username);
  60 void    _PrintUserLine(const char *Line);
  61  int    Dispense_AddUser(int Socket, const char *Username);
  62  int    Dispense_SetUserType(int Socket, const char *Username, const char *TypeString);
  63 // --- Helpers ---
  64 char    *ReadLine(int Socket);
  65  int    sendf(int Socket, const char *Format, ...);
  66 char    *trim(char *string);
  67  int    RunRegex(regex_t *regex, const char *string, int nMatches, regmatch_t *matches, const char *errorMessage);
  68 void    CompileRegex(regex_t *regex, const char *pattern, int flags);
  69
  70 // === GLOBALS ===
  71 char    *gsDispenseServer = "heathred";
  72  int    giDispensePort = 11020;
  73
  74 tItem   *gaItems;
  75  int    giNumItems;
  76 regex_t gArrayRegex, gItemRegex, gSaltRegex, gUserInfoRegex, gUserItemIdentRegex;
  77  int    gbIsAuthenticated = 0;
  78
  79 char    *gsItemPattern; //!< Item pattern
  80 char    *gsEffectiveUser;       //!< '-u' Dispense as another user
  81  int    gbUseNCurses = 0;       //!< '-G' Use the NCurses GUI?
  82  int    gbDryRun = 0;   //!< '-n' Read-only
  83  int    giMinimumBalance = INT_MIN;     //!< '-m' Minumum balance for `dispense acct`
  84  int    giMaximumBalance = INT_MAX;     //!< '-M' Maximum balance for `dispense acct`
  85 char    *gsUserName;    //!< User that dispense will happen as
  86 char    *gsUserFlags;   //!< User's flag set
  87  int    giUserBalance=-1;       //!< User balance (set by Authenticate)
  88
  89 // === CODE ===
  90 int main(int argc, char *argv[])
  91 {
  92          int    sock;
  93          int    i;
  94         char    buffer[BUFSIZ];
  95
  96         // -- Create regular expressions
  97         // > Code Type Count ...
  98         CompileRegex(&gArrayRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([0-9]+)", REG_EXTENDED);     //
  99         // > Code Type Ident Price Desc
 100         CompileRegex(&gItemRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([A-Za-z]+):([0-9]+)\\s+([0-9]+)\\s+(.+)$", REG_EXTENDED);
 101         // > Code 'SALT' salt
 102         CompileRegex(&gSaltRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+(.+)$", REG_EXTENDED);
 103         // > Code 'User' Username Balance Flags
 104         CompileRegex(&gUserInfoRegex, "^([0-9]{3})\\s+([A-Za-z]+)\\s+([^ ]+)\\s+(-?[0-9]+)\\s+(.+)$", REG_EXTENDED);
 105         // > Item Ident
 106         CompileRegex(&gUserItemIdentRegex, "^([A-Za-z]+):([0-9]+)$", REG_EXTENDED);
 107
 108         // Parse Arguments
 109         for( i = 1; i < argc; i ++ )
 110         {
 111                 char    *arg = argv[i];
 112
 113                 if( arg[0] == '-' )
 114                 {
 115                         switch(arg[1])
 116                         {
 117                         case 'h':
 118                         case '?':
 119                                 ShowUsage();
 120                                 return 0;
 121
 122                         case 'm':       // Minimum balance
 123                                 if( i + 1 >= argc ) {
 124                                         fprintf(stderr, "%s: -m takes an argument\n", argv[0]);
 125                                         ShowUsage();
 126                                 }
 127                                 giMinimumBalance = atoi(argv[++i]);
 128                                 break;
 129                         case 'M':       // Maximum balance
 130                                 if( i + 1 >= argc ) {
 131                                         fprintf(stderr, "%s: -M takes an argument\n", argv[0]);
 132                                         ShowUsage();
 133                                 }
 134                                 giMaximumBalance = atoi(argv[++i]);
 135                                 break;
 136
 137                         case 'u':       // Override User
 138                                 if( i + 1 >= argc ) {
 139                                         fprintf(stderr, "%s: -u takes an argument\n", argv[0]);
 140                                         ShowUsage();
 141                                 }
 142                                 gsEffectiveUser = argv[++i];
 143                                 break;
 144
 145                         case 'H':       // Override remote host
 146                                 if( i + 1 >= argc ) {
 147                                         fprintf(stderr, "%s: -H takes an argument\n", argv[0]);
 148                                         ShowUsage();
 149                                 }
 150                                 gsDispenseServer = argv[++i];
 151                                 break;
 152                         case 'P':       // Override remote port
 153                                 if( i + 1 >= argc ) {
 154                                         fprintf(stderr, "%s: -P takes an argument\n", argv[0]);
 155                                         ShowUsage();
 156                                 }
 157                                 giDispensePort = atoi(argv[++i]);
 158                                 break;
 159
 160                         case 'G':       // Use GUI
 161                                 gbUseNCurses = 1;
 162                                 break;
 163                         case 'n':       // Dry Run / read-only
 164                                 gbDryRun = 1;
 165                                 break;
 166                         }
 167
 168                         continue;
 169                 }
 170
 171                 //
 172                 // `dispense acct`
 173                 // -
 174                 if( strcmp(arg, "acct") == 0 )
 175                 {
 176                         // Connect to server
 177                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 178                         if( sock < 0 )  return -1;
 179
 180                         // List accounts?
 181                         if( i + 1 == argc ) {
 182                                 Dispense_EnumUsers(sock);
 183                                 return 0;
 184                         }
 185
 186                         // argv[i+1]: Username
 187
 188                         // Alter account?
 189                         if( i + 2 < argc )
 190                         {
 191                                 if( i + 3 >= argc ) {
 192                                         fprintf(stderr, "Error: `dispense acct' needs a reason\n");
 193                                         exit(1);
 194                                 }
 195
 196                                 // Authentication required
 197                                 if( Authenticate(sock) )
 198                                         return -1;
 199
 200                                 // argv[i+1]: Username
 201                                 // argv[i+2]: Ammount
 202                                 // argv[i+3]: Reason
 203
 204                                 if( argv[i+2][0] == '=' ) {
 205                                         // Set balance
 206                                         if( argv[i+2][1] != '0' && atoi(&argv[i+2][1]) == 0 ) {
 207                                                 fprintf(stderr, "Error: Invalid balance to be set\n");
 208                                                 exit(1);
 209                                         }
 210
 211                                         Dispense_SetBalance(sock, argv[i+1], atoi(argv[i+2]+1), argv[i+3]);
 212                                 }
 213                                 else {
 214                                         // Alter balance
 215                                         Dispense_AlterBalance(sock, argv[i+1], atoi(argv[i+2]), argv[i+3]);
 216                                 }
 217                         }
 218
 219                         // Show user information
 220                         Dispense_ShowUser(sock, argv[i+1]);
 221
 222                         close(sock);
 223                         return 0;
 224                 }
 225                 //
 226                 // `dispense give`
 227                 // - "Here, have some money."
 228                 if( strcmp(arg, "give") == 0 )
 229                 {
 230                         if( i + 3 >= argc ) {
 231                                 fprintf(stderr, "`dispense give` takes three arguments\n");
 232                                 ShowUsage();
 233                                 return -1;
 234                         }
 235
 236                         // argv[i+1]: Destination
 237                         // argv[i+2]: Ammount
 238                         // argv[i+3]: Reason
 239
 240                         // Connect to server
 241                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 242                         if( sock < 0 )  return -1;
 243
 244                         // Authenticate
 245                         if( Authenticate(sock) )
 246                                 return -1;
 247
 248                         Dispense_Give(sock, argv[i+1], atoi(argv[i+2]), argv[i+3]);
 249                         return 0;
 250                 }
 251                 //
 252                 // `dispense user`
 253                 // - User administration (Admin Only)
 254                 if( strcmp(arg, "user") == 0 )
 255                 {
 256                         // Check argument count
 257                         if( i + 1 >= argc ) {
 258                                 fprintf(stderr, "Error: `dispense user` requires arguments\n");
 259                                 ShowUsage();
 260                                 exit(1);
 261                         }
 262
 263                         // Connect to server
 264                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 265                         if( sock < 0 )  return -1;
 266
 267                         // Attempt authentication
 268                         if( Authenticate(sock) )
 269                                 return -1;
 270
 271                         // Add new user?
 272                         if( strcmp(argv[i+1], "add") == 0 )
 273                         {
 274                                 if( i + 2 >= argc ) {
 275                                         fprintf(stderr, "Error: `dispense user add` requires an argument\n");
 276                                         ShowUsage();
 277                                         exit(1);
 278                                 }
 279
 280                                 Dispense_AddUser(sock, argv[i+2]);
 281                         }
 282                         // Update a user
 283                         else if( strcmp(argv[i+1], "type") == 0 )
 284                         {
 285                                 if( i + 3 >= argc ) {
 286                                         fprintf(stderr, "Error: `dispense user type` requires two arguments\n");
 287                                         ShowUsage();
 288                                         exit(1);
 289                                 }
 290
 291                                 Dispense_SetUserType(sock, argv[i+2], argv[i+3]);
 292                         }
 293                         else
 294                         {
 295                                 fprintf(stderr, "Error: Unknown sub-command for `dispense user`\n");
 296                                 ShowUsage();
 297                                 exit(1);
 298                         }
 299                         return 0;
 300                 }
 301
 302                 // Donation!
 303                 if( strcmp(arg, "donate") == 0 )
 304                 {
 305                         // Check argument count
 306                         if( i + 2 >= argc ) {
 307                                 fprintf(stderr, "Error: `dispense donate` requires two arguments\n");
 308                                 ShowUsage();
 309                                 exit(1);
 310                         }
 311
 312                         // Connect to server
 313                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 314                         if( sock < 0 )  return -1;
 315
 316                         // Attempt authentication
 317                         if( Authenticate(sock) )
 318                                 return -1;
 319
 320                         // Do donation
 321                         Dispense_Donate(sock, atoi(argv[i+1]), argv[i+1]);
 322
 323                         return 0;
 324                 }
 325
 326                 else {
 327                         // Item name / pattern
 328                         gsItemPattern = arg;
 329                         break;
 330                 }
 331         }
 332
 333         // Connect to server
 334         sock = OpenConnection(gsDispenseServer, giDispensePort);
 335         if( sock < 0 )  return -1;
 336
 337         // Get the user's balance
 338         GetUserBalance(sock);
 339
 340         // Get items
 341         PopulateItemList(sock);
 342
 343         // Disconnect from server
 344         close(sock);
 345
 346         if( gsItemPattern )
 347         {
 348                 regmatch_t matches[3];
 349                 // Door (hard coded)
 350                 if( strcmp(gsItemPattern, "door") == 0 )
 351                 {
 352                         // Connect, Authenticate, dispense and close
 353                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 354                         if( sock < 0 )  return -1;
 355                         Authenticate(sock);
 356                         DispenseItem(sock, "door", 0);
 357                         close(sock);
 358                         return 0;
 359                 }
 360                 // Item id (<type>:<num>)
 361                 else if( RunRegex(&gUserItemIdentRegex, gsItemPattern, 3, matches, NULL) == 0 )
 362                 {
 363                         char    *ident;
 364                          int    id;
 365
 366                         // Get and finish ident
 367                         ident = gsItemPattern + matches[1].rm_so;
 368                         gsItemPattern[matches[1].rm_eo] = '\0';
 369                         // Get ID
 370                         id = atoi( gsItemPattern + matches[2].rm_so );
 371
 372                         // Connect, Authenticate, dispense and close
 373                         sock = OpenConnection(gsDispenseServer, giDispensePort);
 374                         if( sock < 0 )  return -1;
 375
 376                         Dispense_ItemInfo(sock, ident, id);
 377
 378                         Authenticate(sock);
 379                         DispenseItem(sock, ident, id);
 380                         close(sock);
 381                         return 0;
 382                 }
 383                 // Item number (6 = coke)
 384                 else if( strcmp(gsItemPattern, "0") == 0 || atoi(gsItemPattern) > 0 )
 385                 {
 386                         i = atoi(gsItemPattern);
 387                 }
 388                 // Item prefix
 389                 else
 390                 {
 391                          int    j;
 392                          int    best = -1;
 393                         for( i = 0; i < giNumItems; i ++ )
 394                         {
 395                                 // Prefix match (with case-insensitive match)
 396                                 for( j = 0; gsItemPattern[j]; j ++ )
 397                                 {
 398                                         if( gaItems[i].Desc[j] == gsItemPattern[j] )
 399                                                 continue;
 400                                         if( tolower(gaItems[i].Desc[j]) == tolower(gsItemPattern[j]) )
 401                                                 continue;
 402                                         break;
 403                                 }
 404                                 // Check if the prefix matched
 405                                 if( gsItemPattern[j] != '\0' )
 406                                         continue;
 407
 408                                 // Prefect match
 409                                 if( gaItems[i].Desc[j] == '\0' ) {
 410                                         best = i;
 411                                         break;
 412                                 }
 413
 414                                 // Only one match allowed
 415                                 if( best == -1 ) {
 416                                         best = i;
 417                                 }
 418                                 else {
 419                                         // TODO: Allow ambiguous matches?
 420                                         // or just print a wanrning
 421                                         printf("Warning - Ambiguous pattern, stopping\n");
 422                                         return 1;
 423                                 }
 424                         }
 425
 426                         // Was a match found?
 427                         if( best == -1 )
 428                         {
 429                                 fprintf(stderr, "No item matches the passed string\n");
 430                                 return 1;
 431                         }
 432
 433                         i = best;
 434                 }
 435         }
 436         else if( gbUseNCurses )
 437         {
 438                 i = ShowNCursesUI();
 439         }
 440         else
 441         {
 442                 // Very basic dispense interface
 443                 for( i = 0; i < giNumItems; i ++ ) {
 444                         printf("%2i %s:%i\t%3i %s\n", i, gaItems[i].Type, gaItems[i].ID,
 445                                 gaItems[i].Price, gaItems[i].Desc);
 446                 }
 447                 printf(" q Quit\n");
 448                 for(;;)
 449                 {
 450                         char    *buf;
 451
 452                         i = -1;
 453
 454                         fgets(buffer, BUFSIZ, stdin);
 455
 456                         buf = trim(buffer);
 457
 458                         if( buf[0] == 'q' )     break;
 459
 460                         i = atoi(buf);
 461
 462                         if( i != 0 || buf[0] == '0' )
 463                         {
 464                                 if( i < 0 || i >= giNumItems ) {
 465                                         printf("Bad item %i (should be between 0 and %i)\n", i, giNumItems);
 466                                         continue;
 467                                 }
 468                                 break;
 469                         }
 470                 }
 471         }
 472
 473
 474         // Check for a valid item ID
 475         if( i >= 0 )
 476         {
 477                 // Connect, Authenticate, dispense and close
 478                 sock = OpenConnection(gsDispenseServer, giDispensePort);
 479                 if( sock < 0 )  return -1;
 480
 481                 Dispense_ItemInfo(sock, gaItems[i].Type, gaItems[i].ID);
 482
 483                 Authenticate(sock);
 484                 DispenseItem(sock, gaItems[i].Type, gaItems[i].ID);
 485                 close(sock);
 486         }
 487
 488         return 0;
 489 }
 490
 491 void ShowUsage(void)
 492 {
 493         printf(
 494                 "Usage:\n"
 495                 "  == Everyone ==\n"
 496                 "    dispense\n"
 497                 "        Show interactive list\n"
 498                 "    dispense <item>\n"
 499                 "        Dispense named item\n"
 500                 "    dispense give <user> <ammount> \"<reason>\"\n"
 501                 "        Give money to another user\n"
 502                 "    dispense donate <ammount> \"<reason>\"\n"
 503                 "        Donate to the club\n"
 504                 "  == Coke members == \n"
 505                 "    dispense acct [<user>]\n"
 506                 "        Show user balances\n"
 507                 "    dispense acct <user> [+-]<ammount> \"<reason>\"\n"
 508                 "        Alter a account value\n"
 509                 "  == Dispense administrators ==\n"
 510                 "    dispense acct <user> =<ammount> \"<reason>\"\n"
 511                 "        Set an account balance\n"
 512                 "    dispense user add <user>\n"
 513                 "        Create new coke account (Admins only)\n"
 514                 "    dispense user type <user> <flags>\n"
 515                 "        Alter a user's flags\n"
 516                 "        <flags> is a comma-separated list of user, coke, admin or disabled\n"
 517                 "        Flags are removed by preceding the name with '-' or '!'\n"
 518                 "\n"
 519                 "General Options:\n"
 520                 "    -u <username>\n"
 521                 "        Set a different user (Coke members only)\n"
 522                 "    -h / -?\n"
 523                 "        Show help text\n"
 524                 "    -G\n"
 525                 "        Use alternate GUI\n"
 526                 "    -m <min balance>\n"
 527                 "    -M <max balance>\n"
 528                 "        Set the Maximum/Minimum balances shown in `dispense acct`\n"
 529                 );
 530 }
 531
 532 // -------------------
 533 // --- NCurses GUI ---
 534 // -------------------
 535 /**
 536  * \brief Render the NCurses UI
 537  */
 538 int ShowNCursesUI(void)
 539 {
 540         // TODO: ncurses interface (with separation between item classes)
 541         // - Hmm... that would require standardising the item ID to be <class>:<index>
 542         // Oh, why not :)
 543          int    ch;
 544          int    i, times;
 545          int    xBase, yBase;
 546         const int       displayMinWidth = 40;
 547         const int       displayMinItems = 8;
 548         char    *titleString = "Dispense";
 549          int    itemCount = displayMinItems;
 550          int    itemBase = 0;
 551          int    currentItem = 0;
 552          int    ret = -2;       // -2: Used for marking "no return yet"
 553
 554         char    balance_str[5+1+2+1];   // If $9999.99 is too little, something's wrong
 555         char    *username;
 556         struct passwd *pwd;
 557
 558          int    height, width;
 559
 560         // Get Username
 561         if( gsEffectiveUser )
 562                 username = gsEffectiveUser;
 563         else {
 564                 pwd = getpwuid( getuid() );
 565                 username = pwd->pw_name;
 566         }
 567         // Get balance
 568         snprintf(balance_str, sizeof balance_str, "$%i.%02i", giUserBalance/100, giUserBalance%100);
 569
 570         // Enter curses mode
 571         initscr();
 572         raw(); noecho();
 573
 574         // Get item count
 575         // - 6: randomly chosen (Need at least 3)
 576         itemCount = LINES - 6;
 577         if( itemCount > giNumItems )
 578                 itemCount = giNumItems;
 579
 580         // Get dimensions
 581         height = itemCount + 3;
 582         width = displayMinWidth;
 583
 584         // Get positions
 585         xBase = COLS/2 - width/2;
 586         yBase = LINES/2 - height/2;
 587
 588         for( ;; )
 589         {
 590                 // Header
 591                 PrintAlign(yBase, xBase, width, "/", '-', titleString, '-', "\\");
 592
 593                 // Items
 594                 for( i = 0; i < itemCount; i ++ )
 595                 {
 596                         move( yBase + 1 + i, xBase );
 597
 598                         if( currentItem == itemBase + i ) {
 599                                 printw("| -> ");
 600                         }
 601                         else {
 602                                 printw("|    ");
 603                         }
 604
 605                         // Check for ... row
 606                         // - Oh god, magic numbers!
 607                         if( i == 0 && itemBase > 0 ) {
 608                                 printw("   ...");
 609                                 times = width-1 - 8 - 3;
 610                                 while(times--)  addch(' ');
 611                         }
 612                         else if( i == itemCount - 1 && itemBase < giNumItems - itemCount ) {
 613                                 printw("   ...");
 614                                 times = width-1 - 8 - 3;
 615                                 while(times--)  addch(' ');
 616                         }
 617                         // Show an item
 618                         else {
 619                                 ShowItemAt( yBase + 1 + i, xBase + 5, width - 7, itemBase + i);
 620                                 addch(' ');
 621                         }
 622
 623                         // Scrollbar (if needed)
 624                         if( giNumItems > itemCount ) {
 625                                 if( i == 0 ) {
 626                                         addch('A');
 627                                 }
 628                                 else if( i == itemCount - 1 ) {
 629                                         addch('V');
 630                                 }
 631                                 else {
 632                                          int    percentage = itemBase * 100 / (giNumItems-itemCount);
 633                                         if( i-1 == percentage*(itemCount-3)/100 ) {
 634                                                 addch('#');
 635                                         }
 636                                         else {
 637                                                 addch('|');
 638                                         }
 639                                 }
 640                         }
 641                         else {
 642                                 addch('|');
 643                         }
 644                 }
 645
 646                 // Footer
 647                 PrintAlign(yBase+height-2, xBase, width, "\\", '-', "", '-', "/");
 648
 649                 // User line
 650                 // - Username, balance, flags
 651                 PrintAlign(yBase+height-1, xBase+1, width-2,
 652                         username, ' ', balance_str, ' ', gsUserFlags);
 653
 654
 655                 // Get input
 656                 ch = getch();
 657
 658                 if( ch == '\x1B' ) {
 659                         ch = getch();
 660                         if( ch == '[' ) {
 661                                 ch = getch();
 662
 663                                 switch(ch)
 664                                 {
 665                                 case 'B':
 666                                         //if( itemBase < giNumItems - (itemCount) )
 667                                         //      itemBase ++;
 668                                         if( currentItem < giNumItems - 1 )
 669                                                 currentItem ++;
 670                                         if( itemBase + itemCount - 1 <= currentItem && itemBase + itemCount < giNumItems )
 671                                                 itemBase ++;
 672                                         break;
 673                                 case 'A':
 674                                         //if( itemBase > 0 )
 675                                         //      itemBase --;
 676                                         if( currentItem > 0 )
 677                                                 currentItem --;
 678                                         if( itemBase + 1 > currentItem && itemBase > 0 )
 679                                                 itemBase --;
 680                                         break;
 681                                 }
 682                         }
 683                         else {
 684
 685                         }
 686                 }
 687                 else {
 688                         switch(ch)
 689                         {
 690                         case '\n':
 691                                 ret = currentItem;
 692                                 break;
 693                         case 'q':
 694                                 ret = -1;       // -1: Return with no dispense
 695                                 break;
 696                         }
 697
 698                         // Check if the return value was changed
 699                         if( ret != -2 ) break;
 700                 }
 701
 702         }
 703
 704
 705         // Leave
 706         endwin();
 707         return ret;
 708 }
 709
 710 /**
 711  * \brief Show item \a Index at (\a Col, \a Row)
 712  * \note Part of the NCurses UI
 713  */
 714 void ShowItemAt(int Row, int Col, int Width, int Index)
 715 {
 716          int    _x, _y, times;
 717         char    *name;
 718          int    price;
 719
 720         move( Row, Col );
 721
 722         if( Index < 0 || Index >= giNumItems ) {
 723                 name = "OOR";
 724                 price = 0;
 725         }
 726         else {
 727                 name = gaItems[Index].Desc;
 728                 price = gaItems[Index].Price;
 729         }
 730
 731         printw("%02i %s", Index, name);
 732
 733         getyx(stdscr, _y, _x);
 734         // Assumes max 4 digit prices
 735         times = Width - 4 - (_x - Col); // TODO: Better handling for large prices
 736         while(times--)  addch(' ');
 737         printw("%4i", price);
 738 }
 739
 740 /**
 741  * \brief Print a three-part string at the specified position (formatted)
 742  * \note NCurses UI Helper
 743  *
 744  * Prints \a Left on the left of the area, \a Right on the righthand side
 745  * and \a Mid in the middle of the area. These are padded with \a Pad1
 746  * between \a Left and \a Mid, and \a Pad2 between \a Mid and \a Right.
 747  *
 748  * ::printf style format codes are allowed in \a Left, \a Mid and \a Right,
 749  * and the arguments to these are read in that order.
 750  */
 751 void PrintAlign(int Row, int Col, int Width, const char *Left, char Pad1,
 752         const char *Mid, char Pad2, const char *Right, ...)
 753 {
 754          int    lLen, mLen, rLen;
 755          int    times;
 756
 757         va_list args;
 758
 759         // Get the length of the strings
 760         va_start(args, Right);
 761         lLen = vsnprintf(NULL, 0, Left, args);
 762         mLen = vsnprintf(NULL, 0, Mid, args);
 763         rLen = vsnprintf(NULL, 0, Right, args);
 764         va_end(args);
 765
 766         // Sanity check
 767         if( lLen + mLen/2 > Width/2 || mLen/2 + rLen > Width/2 ) {
 768                 return ;        // TODO: What to do?
 769         }
 770
 771         move(Row, Col);
 772
 773         // Render strings
 774         va_start(args, Right);
 775         // - Left
 776         {
 777                 char    tmp[lLen+1];
 778                 vsnprintf(tmp, lLen+1, Left, args);
 779                 addstr(tmp);
 780         }
 781         // - Left padding
 782         times = (Width - mLen)/2 - lLen;
 783         while(times--)  addch(Pad1);
 784         // - Middle
 785         {
 786                 char    tmp[mLen+1];
 787                 vsnprintf(tmp, mLen+1, Mid, args);
 788                 addstr(tmp);
 789         }
 790         // - Right Padding
 791         times = (Width - mLen)/2 - rLen;
 792         if( (Width - mLen) % 2 )        times ++;
 793         while(times--)  addch(Pad2);
 794         // - Right
 795         {
 796                 char    tmp[rLen+1];
 797                 vsnprintf(tmp, rLen+1, Right, args);
 798                 addstr(tmp);
 799         }
 800 }
 801
 802 // ---------------------
 803 // --- Coke Protocol ---
 804 // ---------------------
 805 int OpenConnection(const char *Host, int Port)
 806 {
 807         struct hostent  *host;
 808         struct sockaddr_in      serverAddr;
 809          int    sock;
 810
 811         host = gethostbyname(Host);
 812         if( !host ) {
 813                 fprintf(stderr, "Unable to look up '%s'\n", Host);
 814                 return -1;
 815         }
 816
 817         memset(&serverAddr, 0, sizeof(serverAddr));
 818
 819         serverAddr.sin_family = AF_INET;        // IPv4
 820         // NOTE: I have a suspicion that IPv6 will play sillybuggers with this :)
 821         serverAddr.sin_addr.s_addr = *((unsigned long *) host->h_addr_list[0]);
 822         serverAddr.sin_port = htons(Port);
 823
 824         sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 825         if( sock < 0 ) {
 826                 fprintf(stderr, "Failed to create socket\n");
 827                 return -1;
 828         }
 829
 830         if( geteuid() == 0 )
 831         {
 832                  int    i;
 833                 struct sockaddr_in      localAddr;
 834                 memset(&localAddr, 0, sizeof(localAddr));
 835                 localAddr.sin_family = AF_INET; // IPv4
 836
 837                 // Loop through all the top ports until one is avaliable
 838                 for( i = 1001; i < 1024; i ++)
 839                 {
 840                         localAddr.sin_port = htons(i);  // IPv4
 841                         // Attempt to bind to low port for autoauth
 842                         if( bind(sock, (struct sockaddr*)&localAddr, sizeof(localAddr)) == 0 )
 843                                 break;
 844                 }
 845                 if( i == 1024 )
 846                         printf("Warning: AUTOAUTH unavaliable\n");
 847         }
 848
 849         if( connect(sock, (struct sockaddr *) &serverAddr, sizeof(serverAddr)) < 0 ) {
 850                 fprintf(stderr, "Failed to connect to server\n");
 851                 return -1;
 852         }
 853
 854         return sock;
 855 }
 856
 857 /**
 858  * \brief Authenticate with the server
 859  * \return Boolean Failure
 860  */
 861 int Authenticate(int Socket)
 862 {
 863         struct passwd   *pwd;
 864         char    *buf;
 865          int    responseCode;
 866         char    salt[32];
 867          int    i;
 868         regmatch_t      matches[4];
 869
 870         if( gbIsAuthenticated ) return 0;
 871
 872         // Get user name
 873         pwd = getpwuid( getuid() );
 874
 875         // Attempt automatic authentication
 876         sendf(Socket, "AUTOAUTH %s\n", pwd->pw_name);
 877
 878         // Check if it worked
 879         buf = ReadLine(Socket);
 880
 881         responseCode = atoi(buf);
 882         switch( responseCode )
 883         {
 884         case 200:       // Autoauth succeeded, return
 885                 free(buf);
 886                 break;
 887
 888         case 401:       // Untrusted, attempt password authentication
 889                 free(buf);
 890
 891                 sendf(Socket, "USER %s\n", pwd->pw_name);
 892                 printf("Using username %s\n", pwd->pw_name);
 893
 894                 buf = ReadLine(Socket);
 895
 896                 // TODO: Get Salt
 897                 // Expected format: 100 SALT <something> ...
 898                 // OR             : 100 User Set
 899                 RunRegex(&gSaltRegex, buf, 4, matches, "Malformed server response");
 900                 responseCode = atoi(buf);
 901                 if( responseCode != 100 ) {
 902                         fprintf(stderr, "Unknown repsonse code %i from server\n%s\n", responseCode, buf);
 903                         free(buf);
 904                         return -1;      // ERROR
 905                 }
 906
 907                 // Check for salt
 908                 if( memcmp( buf+matches[2].rm_so, "SALT", matches[2].rm_eo - matches[2].rm_so) == 0) {
 909                         // Store it for later
 910                         memcpy( salt, buf + matches[3].rm_so, matches[3].rm_eo - matches[3].rm_so );
 911                         salt[ matches[3].rm_eo - matches[3].rm_so ] = 0;
 912                 }
 913                 free(buf);
 914
 915                 // Give three attempts
 916                 for( i = 0; i < 3; i ++ )
 917                 {
 918                          int    ofs = strlen(pwd->pw_name)+strlen(salt);
 919                         char    tmpBuf[42];
 920                         char    tmp[ofs+20];
 921                         char    *pass = getpass("Password: ");
 922                         uint8_t h[20];
 923
 924                         // Create hash string
 925                         // <username><salt><hash>
 926                         strcpy(tmp, pwd->pw_name);
 927                         strcat(tmp, salt);
 928                         SHA1( (unsigned char*)pass, strlen(pass), h );
 929                         memcpy(tmp+ofs, h, 20);
 930
 931                         // Hash all that
 932                         SHA1( (unsigned char*)tmp, ofs+20, h );
 933                         sprintf(tmpBuf, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
 934                                 h[ 0], h[ 1], h[ 2], h[ 3], h[ 4], h[ 5], h[ 6], h[ 7], h[ 8], h[ 9],
 935                                 h[10], h[11], h[12], h[13], h[14], h[15], h[16], h[17], h[18], h[19]
 936                                 );
 937
 938                         // Send password
 939                         sendf(Socket, "PASS %s\n", tmpBuf);
 940                         buf = ReadLine(Socket);
 941
 942                         responseCode = atoi(buf);
 943                         // Auth OK?
 944                         if( responseCode == 200 )       break;
 945                         // Bad username/password
 946                         if( responseCode == 401 )       continue;
 947
 948                         fprintf(stderr, "Unknown repsonse code %i from server\n%s\n", responseCode, buf);
 949                         free(buf);
 950                         return -1;
 951                 }
 952                 free(buf);
 953                 if( i == 3 )
 954                         return 2;       // 2 = Bad Password
 955                 break;
 956
 957         case 404:       // Bad Username
 958                 fprintf(stderr, "Bad Username '%s'\n", pwd->pw_name);
 959                 free(buf);
 960                 return 1;
 961
 962         default:
 963                 fprintf(stderr, "Unkown response code %i from server\n", responseCode);
 964                 printf("%s\n", buf);
 965                 free(buf);
 966                 return -1;
 967         }
 968
 969         // Set effective user
 970         if( gsEffectiveUser ) {
 971                 sendf(Socket, "SETEUSER %s\n", gsEffectiveUser);
 972
 973                 buf = ReadLine(Socket);
 974                 responseCode = atoi(buf);
 975
 976                 switch(responseCode)
 977                 {
 978                 case 200:
 979                         printf("Running as '%s' by '%s'\n", gsEffectiveUser, pwd->pw_name);
 980                         break;
 981
 982                 case 403:
 983                         printf("Only coke members can use `dispense -u`\n");
 984                         free(buf);
 985                         return -1;
 986
 987                 case 404:
 988                         printf("Invalid user selected\n");
 989                         free(buf);
 990                         return -1;
 991
 992                 default:
 993                         fprintf(stderr, "Unkown response code %i from server\n", responseCode);
 994                         printf("%s\n", buf);
 995                         free(buf);
 996                         exit(-1);
 997                 }
 998
 999                 free(buf);
1000         }
1001
1002         gbIsAuthenticated = 1;
1003
1004         return 0;
1005 }
1006
1007 int GetUserBalance(int Socket)
1008 {
1009         regmatch_t      matches[6];
1010         struct passwd   *pwd;
1011         char    *buf;
1012          int    responseCode;
1013
1014         if( !gsUserName )
1015         {
1016                 if( gsEffectiveUser ) {
1017                         gsUserName = gsEffectiveUser;
1018                 }
1019                 else {
1020                         pwd = getpwuid( getuid() );
1021                         gsUserName = strdup(pwd->pw_name);
1022                 }
1023         }
1024
1025         sendf(Socket, "USER_INFO %s\n", gsUserName);
1026         buf = ReadLine(Socket);
1027         responseCode = atoi(buf);
1028         switch(responseCode)
1029         {
1030         case 202:       break;  // Ok
1031
1032         case 404:
1033                 printf("Invalid user? (USER_INFO failed)\n");
1034                 free(buf);
1035                 return -1;
1036
1037         default:
1038                 fprintf(stderr, "Unkown response code %i from server\n", responseCode);
1039                 printf("%s\n", buf);
1040                 free(buf);
1041                 exit(-1);
1042         }
1043
1044         RunRegex(&gUserInfoRegex, buf, 6, matches, "Malformed server response");
1045
1046         giUserBalance = atoi( buf + matches[4].rm_so );
1047         gsUserFlags = strdup( buf + matches[5].rm_so );
1048
1049         free(buf);
1050
1051         return 0;
1052 }
1053
1054
1055 /**
1056  * \brief Fill the item information structure
1057  * \return Boolean Failure
1058  */
1059 void PopulateItemList(int Socket)
1060 {
1061         char    *buf;
1062          int    responseCode;
1063
1064         char    *itemType, *itemStart;
1065          int    count, i;
1066         regmatch_t      matches[4];
1067
1068         // Ask server for stock list
1069         send(Socket, "ENUM_ITEMS\n", 11, 0);
1070         buf = ReadLine(Socket);
1071
1072         //printf("Output: %s\n", buf);
1073
1074         responseCode = atoi(buf);
1075         if( responseCode != 201 ) {
1076                 fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n", responseCode);
1077                 exit(-1);
1078         }
1079
1080         // - Get item list -
1081
1082         // Expected format:
1083         //  201 Items <count>
1084         //  202 Item <count>
1085         RunRegex(&gArrayRegex, buf, 4, matches, "Malformed server response");
1086
1087         itemType = &buf[ matches[2].rm_so ];    buf[ matches[2].rm_eo ] = '\0';
1088         count = atoi( &buf[ matches[3].rm_so ] );
1089
1090         // Check array type
1091         if( strcmp(itemType, "Items") != 0 ) {
1092                 // What the?!
1093                 fprintf(stderr, "Unexpected array type, expected 'Items', got '%s'\n",
1094                         itemType);
1095                 exit(-1);
1096         }
1097
1098         itemStart = &buf[ matches[3].rm_eo ];
1099
1100         free(buf);
1101
1102         giNumItems = count;
1103         gaItems = malloc( giNumItems * sizeof(tItem) );
1104
1105         // Fetch item information
1106         for( i = 0; i < giNumItems; i ++ )
1107         {
1108                 regmatch_t      matches[7];
1109
1110                 // Get item info
1111                 buf = ReadLine(Socket);
1112                 responseCode = atoi(buf);
1113
1114                 if( responseCode != 202 ) {
1115                         fprintf(stderr, "Unknown response from dispense server (Response Code %i)\n", responseCode);
1116                         exit(-1);
1117                 }
1118
1119                 RunRegex(&gItemRegex, buf, 7, matches, "Malformed server response");
1120
1121                 buf[ matches[3].rm_eo ] = '\0';
1122
1123                 gaItems[i].Type = strdup( buf + matches[3].rm_so );
1124                 gaItems[i].ID = atoi( buf + matches[4].rm_so );
1125                 gaItems[i].Price = atoi( buf + matches[5].rm_so );
1126                 gaItems[i].Desc = strdup( buf + matches[6].rm_so );
1127
1128                 free(buf);
1129         }
1130
1131         // Read end of list
1132         buf = ReadLine(Socket);
1133         responseCode = atoi(buf);
1134
1135         if( responseCode != 200 ) {
1136                 fprintf(stderr, "Unknown response from dispense server %i\n'%s'",
1137                         responseCode, buf
1138                         );
1139                 exit(-1);
1140         }
1141
1142         free(buf);
1143 }
1144
1145
1146 /**
1147  * \brief Get information on an item
1148  * \return Boolean Failure
1149  */
1150 int Dispense_ItemInfo(int Socket, const char *Type, int ID)
1151 {
1152          int    responseCode;
1153         char    *buf;
1154         regmatch_t matches[7];
1155         char    *type, *desc;
1156          int    id, price;
1157
1158         // Dispense!
1159         sendf(Socket, "ITEM_INFO %s:%i\n", Type, ID);
1160         buf = ReadLine(Socket);
1161
1162         responseCode = atoi(buf);
1163         switch( responseCode )
1164         {
1165         case 202:
1166                 break;
1167
1168         case 406:
1169                 printf("Bad item name\n");
1170                 free(buf);
1171                 return 1;
1172
1173         default:
1174                 printf("Unknown response code %i ('%s')\n", responseCode, buf);
1175                 free(buf);
1176                 return -1;
1177         }
1178
1179
1180         RunRegex(&gItemRegex, buf, 7, matches, "Malformed server response");
1181
1182         buf[ matches[3].rm_eo ] = '\0';
1183
1184         type = buf + matches[3].rm_so;  buf[matches[3].rm_eo] = '\0';
1185         id = atoi( buf + matches[4].rm_so );
1186         price = atoi( buf + matches[5].rm_so );
1187         desc = buf + matches[6].rm_so;  buf[matches[6].rm_eo] = '\0';
1188
1189         printf("%8s:%-2i %2i.%02i %s\n", type, id, price/100, price%100, desc);
1190
1191         free(buf);
1192
1193         return 0;
1194 }
1195
1196 /**
1197  * \brief Dispense an item
1198  * \return Boolean Failure
1199  */
1200 int DispenseItem(int Socket, const char *Type, int ID)
1201 {
1202          int    ret, responseCode;
1203         char    *buf;
1204
1205         // Check for a dry run
1206         if( gbDryRun ) {
1207                 printf("Dry Run - No action\n");
1208                 return 0;
1209         }
1210
1211         // Dispense!
1212         sendf(Socket, "DISPENSE %s:%i\n", Type, ID);
1213         buf = ReadLine(Socket);
1214
1215         responseCode = atoi(buf);
1216         switch( responseCode )
1217         {
1218         case 200:
1219                 printf("Dispense OK\n");
1220                 ret = 0;
1221                 break;
1222         case 401:
1223                 printf("Not authenticated\n");
1224                 ret = 1;
1225                 break;
1226         case 402:
1227                 printf("Insufficient balance\n");
1228                 ret = 1;
1229                 break;
1230         case 406:
1231                 printf("Bad item name\n");
1232                 ret = 1;
1233                 break;
1234         case 500:
1235                 printf("Item failed to dispense, is the slot empty?\n");
1236                 ret = 1;
1237                 break;
1238         case 501:
1239                 printf("Dispense not possible (slot empty/permissions)\n");
1240                 ret = 1;
1241                 break;
1242         default:
1243                 printf("Unknown response code %i ('%s')\n", responseCode, buf);
1244                 ret = -2;
1245                 break;
1246         }
1247
1248         free(buf);
1249         return ret;
1250 }
1251
1252 /**
1253  * \brief Alter a user's balance
1254  */
1255 int Dispense_AlterBalance(int Socket, const char *Username, int Ammount, const char *Reason)
1256 {
1257         char    *buf;
1258          int    responseCode;
1259
1260         // Check for a dry run
1261         if( gbDryRun ) {
1262                 printf("Dry Run - No action\n");
1263                 return 0;
1264         }
1265
1266         sendf(Socket, "ADD %s %i %s\n", Username, Ammount, Reason);
1267         buf = ReadLine(Socket);
1268
1269         responseCode = atoi(buf);
1270         free(buf);
1271
1272         switch(responseCode)
1273         {
1274         case 200:       return 0;       // OK
1275         case 402:
1276                 fprintf(stderr, "Insufficient balance\n");
1277                 return 1;
1278         case 403:       // Not in coke
1279                 fprintf(stderr, "You are not in coke (sucker)\n");
1280                 return 1;
1281         case 404:       // Unknown user
1282                 fprintf(stderr, "Unknown user '%s'\n", Username);
1283                 return 2;
1284         default:
1285                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1286                 return -1;
1287         }
1288
1289         return -1;
1290 }
1291
1292 /**
1293  * \brief Set a user's balance
1294  * \note Only avaliable to dispense admins
1295  */
1296 int Dispense_SetBalance(int Socket, const char *Username, int Balance, const char *Reason)
1297 {
1298         char    *buf;
1299          int    responseCode;
1300
1301         // Check for a dry run
1302         if( gbDryRun ) {
1303                 printf("Dry Run - No action\n");
1304                 return 0;
1305         }
1306
1307         sendf(Socket, "SET %s %i %s\n", Username, Balance, Reason);
1308         buf = ReadLine(Socket);
1309
1310         responseCode = atoi(buf);
1311         free(buf);
1312
1313         switch(responseCode)
1314         {
1315         case 200:       return 0;       // OK
1316         case 403:       // Not in coke
1317                 fprintf(stderr, "You are not an admin\n");
1318                 return 1;
1319         case 404:       // Unknown user
1320                 fprintf(stderr, "Unknown user '%s'\n", Username);
1321                 return 2;
1322         default:
1323                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1324                 return -1;
1325         }
1326
1327         return -1;
1328 }
1329
1330 /**
1331  * \brief Give money to another user
1332  */
1333 int Dispense_Give(int Socket, const char *Username, int Ammount, const char *Reason)
1334 {
1335         char    *buf;
1336          int    responseCode;
1337
1338         if( Ammount < 0 ) {
1339                 printf("Sorry, you can only give, you can't take.\n");
1340                 return -1;
1341         }
1342
1343         // Fast return on zero
1344         if( Ammount == 0 ) {
1345                 printf("Are you actually going to give any?\n");
1346                 return 0;
1347         }
1348
1349         // Check for a dry run
1350         if( gbDryRun ) {
1351                 printf("Dry Run - No action\n");
1352                 return 0;
1353         }
1354
1355         sendf(Socket, "GIVE %s %i %s\n", Username, Ammount, Reason);
1356         buf = ReadLine(Socket);
1357
1358         responseCode = atoi(buf);
1359         free(buf);
1360
1361         switch(responseCode)
1362         {
1363         case 200:       return 0;       // OK
1364
1365         case 402:
1366                 fprintf(stderr, "Insufficient balance\n");
1367                 return 1;
1368
1369         case 404:       // Unknown user
1370                 fprintf(stderr, "Unknown user '%s'\n", Username);
1371                 return 2;
1372
1373         default:
1374                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1375                 return -1;
1376         }
1377
1378         return -1;
1379 }
1380
1381
1382 /**
1383  * \brief Donate money to the club
1384  */
1385 int Dispense_Donate(int Socket, int Ammount, const char *Reason)
1386 {
1387         char    *buf;
1388          int    responseCode;
1389
1390         if( Ammount < 0 ) {
1391                 printf("Sorry, you can only give, you can't take.\n");
1392                 return -1;
1393         }
1394
1395         // Fast return on zero
1396         if( Ammount == 0 ) {
1397                 printf("Are you actually going to give any?\n");
1398                 return 0;
1399         }
1400
1401         // Check for a dry run
1402         if( gbDryRun ) {
1403                 printf("Dry Run - No action\n");
1404                 return 0;
1405         }
1406
1407         sendf(Socket, "DONATE %i %s\n", Ammount, Reason);
1408         buf = ReadLine(Socket);
1409
1410         responseCode = atoi(buf);
1411         free(buf);
1412
1413         switch(responseCode)
1414         {
1415         case 200:       return 0;       // OK
1416
1417         case 402:
1418                 fprintf(stderr, "Insufficient balance\n");
1419                 return 1;
1420
1421         default:
1422                 fprintf(stderr, "Unknown response code %i\n", responseCode);
1423                 return -1;
1424         }
1425
1426         return -1;
1427 }
1428
1429 /**
1430  * \brief Enumerate users
1431  */
1432 int Dispense_EnumUsers(int Socket)
1433 {
1434         char    *buf;
1435          int    responseCode;
1436          int    nUsers;
1437         regmatch_t      matches[4];
1438
1439         if( giMinimumBalance != INT_MIN ) {
1440                 if( giMaximumBalance != INT_MAX ) {
1441                         sendf(Socket, "ENUM_USERS min_balance:%i max_balance:%i\n", giMinimumBalance, giMaximumBalance);
1442                 }
1443                 else {
1444                         sendf(Socket, "ENUM_USERS min_balance:%i\n", giMinimumBalance);
1445                 }
1446         }
1447         else {
1448                 if( giMaximumBalance != INT_MAX ) {
1449                         sendf(Socket, "ENUM_USERS max_balance:%i\n", giMaximumBalance);
1450                 }
1451                 else {
1452                         sendf(Socket, "ENUM_USERS\n");
1453                 }
1454         }
1455         buf = ReadLine(Socket);
1456         responseCode = atoi(buf);
1457
1458         switch(responseCode)
1459         {
1460         case 201:       break;  // Ok, length follows
1461
1462         default:
1463                 fprintf(stderr, "Unknown response code %i\n%s\n", responseCode, buf);
1464                 free(buf);
1465                 return -1;
1466         }
1467
1468         // Get count (not actually used)
1469         RunRegex(&gArrayRegex, buf, 4, matches, "Malformed server response");
1470         nUsers = atoi( buf + matches[3].rm_so );
1471         printf("%i users returned\n", nUsers);
1472
1473         // Free string
1474         free(buf);
1475
1476         // Read returned users
1477         do {
1478                 buf = ReadLine(Socket);
1479                 responseCode = atoi(buf);
1480
1481                 if( responseCode != 202 )       break;
1482
1483                 _PrintUserLine(buf);
1484                 free(buf);
1485         } while(responseCode == 202);
1486
1487         // Check final response
1488         if( responseCode != 200 ) {
1489                 fprintf(stderr, "Unknown response code %i\n%s\n", responseCode, buf);
1490                 free(buf);
1491                 return -1;
1492         }
1493
1494         free(buf);
1495
1496         return 0;
1497 }
1498
1499 int Dispense_ShowUser(int Socket, const char *Username)
1500 {
1501         char    *buf;
1502          int    responseCode, ret;
1503
1504         sendf(Socket, "USER_INFO %s\n", Username);
1505         buf = ReadLine(Socket);
1506
1507         responseCode = atoi(buf);
1508
1509         switch(responseCode)
1510         {
1511         case 202:
1512                 _PrintUserLine(buf);
1513                 ret = 0;
1514                 break;
1515
1516         case 404:
1517                 printf("Unknown user '%s'\n", Username);
1518                 ret = 1;
1519                 break;
1520
1521         default:
1522                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
1523                 ret = -1;
1524                 break;
1525         }
1526
1527         free(buf);
1528
1529         return ret;
1530 }
1531
1532 void _PrintUserLine(const char *Line)
1533 {
1534         regmatch_t      matches[6];
1535          int    bal;
1536
1537         RunRegex(&gUserInfoRegex, Line, 6, matches, "Malformed server response");
1538         // 3: Username
1539         // 4: Balance
1540         // 5: Flags
1541         {
1542                  int    usernameLen = matches[3].rm_eo - matches[3].rm_so;
1543                 char    username[usernameLen + 1];
1544                  int    flagsLen = matches[5].rm_eo - matches[5].rm_so;
1545                 char    flags[flagsLen + 1];
1546
1547                 memcpy(username, Line + matches[3].rm_so, usernameLen);
1548                 username[usernameLen] = '\0';
1549                 memcpy(flags, Line + matches[5].rm_so, flagsLen);
1550                 flags[flagsLen] = '\0';
1551
1552                 bal = atoi(Line + matches[4].rm_so);
1553                 printf("%-15s: $%4i.%02i (%s)\n", username, bal/100, abs(bal)%100, flags);
1554         }
1555 }
1556
1557 int Dispense_AddUser(int Socket, const char *Username)
1558 {
1559         char    *buf;
1560          int    responseCode, ret;
1561
1562         // Check for a dry run
1563         if( gbDryRun ) {
1564                 printf("Dry Run - No action\n");
1565                 return 0;
1566         }
1567
1568         sendf(Socket, "USER_ADD %s\n", Username);
1569
1570         buf = ReadLine(Socket);
1571         responseCode = atoi(buf);
1572
1573         switch(responseCode)
1574         {
1575         case 200:
1576                 printf("User '%s' added\n", Username);
1577                 ret = 0;
1578                 break;
1579
1580         case 403:
1581                 printf("Only wheel can add users\n");
1582                 ret = 1;
1583                 break;
1584
1585         case 404:
1586                 printf("User '%s' already exists\n", Username);
1587                 ret = 0;
1588                 break;
1589
1590         default:
1591                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
1592                 ret = -1;
1593                 break;
1594         }
1595
1596         free(buf);
1597
1598         return ret;
1599 }
1600
1601 int Dispense_SetUserType(int Socket, const char *Username, const char *TypeString)
1602 {
1603         char    *buf;
1604          int    responseCode, ret;
1605
1606         // Check for a dry run
1607         if( gbDryRun ) {
1608                 printf("Dry Run - No action\n");
1609                 return 0;
1610         }
1611
1612         // TODO: Pre-validate the string
1613
1614         sendf(Socket, "USER_FLAGS %s %s\n", Username, TypeString);
1615
1616         buf = ReadLine(Socket);
1617         responseCode = atoi(buf);
1618
1619         switch(responseCode)
1620         {
1621         case 200:
1622                 printf("User '%s' updated\n", Username);
1623                 ret = 0;
1624                 break;
1625
1626         case 403:
1627                 printf("Only wheel can modify users\n");
1628                 ret = 1;
1629                 break;
1630
1631         case 404:
1632                 printf("User '%s' does not exist\n", Username);
1633                 ret = 0;
1634                 break;
1635
1636         case 407:
1637                 printf("Flag string is invalid\n");
1638                 ret = 0;
1639                 break;
1640
1641         default:
1642                 fprintf(stderr, "Unknown response code %i '%s'\n", responseCode, buf);
1643                 ret = -1;
1644                 break;
1645         }
1646
1647         free(buf);
1648
1649         return ret;
1650 }
1651
1652 // ---------------
1653 // --- Helpers ---
1654 // ---------------
1655 char *ReadLine(int Socket)
1656 {
1657         static char     buf[BUFSIZ];
1658         static int      bufPos = 0;
1659         static int      bufValid = 0;
1660          int    len;
1661         char    *newline = NULL;
1662          int    retLen = 0;
1663         char    *ret = malloc(10);
1664
1665         #if DEBUG_TRACE_SERVER
1666         printf("ReadLine: ");
1667         #endif
1668         fflush(stdout);
1669
1670         ret[0] = '\0';
1671
1672         while( !newline )
1673         {
1674                 if( bufValid ) {
1675                         len = bufValid;
1676                 }
1677                 else {
1678                         len = recv(Socket, buf+bufPos, BUFSIZ-1-bufPos, 0);
1679                         buf[bufPos+len] = '\0';
1680                 }
1681
1682                 newline = strchr( buf+bufPos, '\n' );
1683                 if( newline ) {
1684                         *newline = '\0';
1685                 }
1686
1687                 retLen += strlen(buf+bufPos);
1688                 ret = realloc(ret, retLen + 1);
1689                 strcat( ret, buf+bufPos );
1690
1691                 if( newline ) {
1692                          int    newLen = newline - (buf+bufPos) + 1;
1693                         bufValid = len - newLen;
1694                         bufPos += newLen;
1695                 }
1696                 if( len + bufPos == BUFSIZ - 1 )        bufPos = 0;
1697         }
1698
1699         #if DEBUG_TRACE_SERVER
1700         printf("%i '%s'\n", retLen, ret);
1701         #endif
1702
1703         return ret;
1704 }
1705
1706 int sendf(int Socket, const char *Format, ...)
1707 {
1708         va_list args;
1709          int    len;
1710
1711         va_start(args, Format);
1712         len = vsnprintf(NULL, 0, Format, args);
1713         va_end(args);
1714
1715         {
1716                 char    buf[len+1];
1717                 va_start(args, Format);
1718                 vsnprintf(buf, len+1, Format, args);
1719                 va_end(args);
1720
1721                 #if DEBUG_TRACE_SERVER
1722                 printf("sendf: %s", buf);
1723                 #endif
1724
1725                 return send(Socket, buf, len, 0);
1726         }
1727 }
1728
1729 char *trim(char *string)
1730 {
1731          int    i;
1732
1733         while( isspace(*string) )
1734                 string ++;
1735
1736         for( i = strlen(string); i--; )
1737         {
1738                 if( isspace(string[i]) )
1739                         string[i] = '\0';
1740                 else
1741                         break;
1742         }
1743
1744         return string;
1745 }
1746
1747 int RunRegex(regex_t *regex, const char *string, int nMatches, regmatch_t *matches, const char *errorMessage)
1748 {
1749          int    ret;
1750
1751         ret = regexec(regex, string, nMatches, matches, 0);
1752         if( ret && errorMessage ) {
1753                 size_t  len = regerror(ret, regex, NULL, 0);
1754                 char    errorStr[len];
1755                 regerror(ret, regex, errorStr, len);
1756                 printf("string = '%s'\n", string);
1757                 fprintf(stderr, "%s\n%s", errorMessage, errorStr);
1758                 exit(-1);
1759         }
1760
1761         return ret;
1762 }
1763
1764 void CompileRegex(regex_t *regex, const char *pattern, int flags)
1765 {
1766          int    ret = regcomp(regex, pattern, flags);
1767         if( ret ) {
1768                 size_t  len = regerror(ret, regex, NULL, 0);
1769                 char    errorStr[len];
1770                 regerror(ret, regex, errorStr, len);
1771                 fprintf(stderr, "Regex compilation failed - %s\n", errorStr);
1772                 exit(-1);
1773         }
1774 }