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