src/server/server.c

   1 /*
   2  * OpenDispense 2
   3  * UCC (University [of WA] Computer Club) Electronic Accounting System
   4  *
   5  * server.c - Client Server Code
   6  *
   7  * This file is licenced under the 3-clause BSD Licence. See the file
   8  * COPYING for full details.
   9  */
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include "common.h"
  13 #include <sys/socket.h>
  14 #include <netinet/in.h>
  15 #include <arpa/inet.h>
  16 #include <unistd.h>
  17 #include <string.h>
  18 #include <limits.h>
  19 #include <stdarg.h>
  20
  21 #define DEBUG_TRACE_CLIENT      0
  22
  23 // Statistics
  24 #define MAX_CONNECTION_QUEUE    5
  25 #define INPUT_BUFFER_SIZE       256
  26 #define CLIENT_TIMEOUT  10      // Seconds
  27
  28 #define HASH_TYPE       SHA1
  29 #define HASH_LENGTH     20
  30
  31 #define MSG_STR_TOO_LONG        "499 Command too long (limit "EXPSTR(INPUT_BUFFER_SIZE)")\n"
  32
  33 // === TYPES ===
  34 typedef struct sClient
  35 {
  36          int    Socket; // Client socket ID
  37          int    ID;     // Client ID
  38
  39          int    bIsTrusted;     // Is the connection from a trusted host/port
  40
  41         char    *Username;
  42         char    Salt[9];
  43
  44          int    UID;
  45          int    EffectiveUID;
  46          int    bIsAuthed;
  47 }       tClient;
  48
  49 // === PROTOTYPES ===
  50 void    Server_Start(void);
  51 void    Server_Cleanup(void);
  52 void    Server_HandleClient(int Socket, int bTrusted);
  53 void    Server_ParseClientCommand(tClient *Client, char *CommandString);
  54 // --- Commands ---
  55 void    Server_Cmd_USER(tClient *Client, char *Args);
  56 void    Server_Cmd_PASS(tClient *Client, char *Args);
  57 void    Server_Cmd_AUTOAUTH(tClient *Client, char *Args);
  58 void    Server_Cmd_SETEUSER(tClient *Client, char *Args);
  59 void    Server_Cmd_ENUMITEMS(tClient *Client, char *Args);
  60 void    Server_Cmd_ITEMINFO(tClient *Client, char *Args);
  61 void    Server_Cmd_DISPENSE(tClient *Client, char *Args);
  62 void    Server_Cmd_GIVE(tClient *Client, char *Args);
  63 void    Server_Cmd_DONATE(tClient *Client, char *Args);
  64 void    Server_Cmd_ADD(tClient *Client, char *Args);
  65 void    Server_Cmd_SET(tClient *Client, char *Args);
  66 void    Server_Cmd_ENUMUSERS(tClient *Client, char *Args);
  67 void    Server_Cmd_USERINFO(tClient *Client, char *Args);
  68 void    _SendUserInfo(tClient *Client, int UserID);
  69 void    Server_Cmd_USERADD(tClient *Client, char *Args);
  70 void    Server_Cmd_USERFLAGS(tClient *Client, char *Args);
  71 // --- Helpers ---
  72 void    Debug(tClient *Client, const char *Format, ...);
  73  int    sendf(int Socket, const char *Format, ...);
  74  int    Server_int_ParseArgs(int bUseLongArg, char *ArgStr, ...);
  75  int    Server_int_ParseFlags(tClient *Client, const char *Str, int *Mask, int *Value);
  76
  77 // === CONSTANTS ===
  78 // - Commands
  79 const struct sClientCommand {
  80         const char      *Name;
  81         void    (*Function)(tClient *Client, char *Arguments);
  82 }       gaServer_Commands[] = {
  83         {"USER", Server_Cmd_USER},
  84         {"PASS", Server_Cmd_PASS},
  85         {"AUTOAUTH", Server_Cmd_AUTOAUTH},
  86         {"SETEUSER", Server_Cmd_SETEUSER},
  87         {"ENUM_ITEMS", Server_Cmd_ENUMITEMS},
  88         {"ITEM_INFO", Server_Cmd_ITEMINFO},
  89         {"DISPENSE", Server_Cmd_DISPENSE},
  90         {"GIVE", Server_Cmd_GIVE},
  91         {"DONATE", Server_Cmd_DONATE},
  92         {"ADD", Server_Cmd_ADD},
  93         {"SET", Server_Cmd_SET},
  94         {"ENUM_USERS", Server_Cmd_ENUMUSERS},
  95         {"USER_INFO", Server_Cmd_USERINFO},
  96         {"USER_ADD", Server_Cmd_USERADD},
  97         {"USER_FLAGS", Server_Cmd_USERFLAGS}
  98 };
  99 #define NUM_COMMANDS    ((int)(sizeof(gaServer_Commands)/sizeof(gaServer_Commands[0])))
 100
 101 // === GLOBALS ===
 102  int    giServer_Port = 1020;
 103  int    giServer_NextClientID = 1;
 104  int    giServer_Socket;
 105
 106 // === CODE ===
 107 /**
 108  * \brief Open listenting socket and serve connections
 109  */
 110 void Server_Start(void)
 111 {
 112          int    client_socket;
 113         struct sockaddr_in      server_addr, client_addr;
 114
 115         atexit(Server_Cleanup);
 116
 117         // Create Server
 118         giServer_Socket = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 119         if( giServer_Socket < 0 ) {
 120                 fprintf(stderr, "ERROR: Unable to create server socket\n");
 121                 return ;
 122         }
 123
 124         // Make listen address
 125         memset(&server_addr, 0, sizeof(server_addr));
 126         server_addr.sin_family = AF_INET;       // Internet Socket
 127         server_addr.sin_addr.s_addr = htonl(INADDR_ANY);        // Listen on all interfaces
 128         server_addr.sin_port = htons(giServer_Port);    // Port
 129
 130         // Bind
 131         if( bind(giServer_Socket, (struct sockaddr *) &server_addr, sizeof(server_addr)) < 0 ) {
 132                 fprintf(stderr, "ERROR: Unable to bind to 0.0.0.0:%i\n", giServer_Port);
 133                 perror("Binding");
 134                 return ;
 135         }
 136
 137         // Listen
 138         if( listen(giServer_Socket, MAX_CONNECTION_QUEUE) < 0 ) {
 139                 fprintf(stderr, "ERROR: Unable to listen to socket\n");
 140                 perror("Listen");
 141                 return ;
 142         }
 143
 144         printf("Listening on 0.0.0.0:%i\n", giServer_Port);
 145
 146         for(;;)
 147         {
 148                 uint    len = sizeof(client_addr);
 149                  int    bTrusted = 0;
 150
 151                 // Accept a connection
 152                 client_socket = accept(giServer_Socket, (struct sockaddr *) &client_addr, &len);
 153                 if(client_socket < 0) {
 154                         fprintf(stderr, "ERROR: Unable to accept client connection\n");
 155                         return ;
 156                 }
 157
 158                 // Set a timeout on the user conneciton
 159                 {
 160                         struct timeval tv;
 161                         tv.tv_sec = CLIENT_TIMEOUT;
 162                         tv.tv_usec = 0;
 163                         if( setsockopt(client_socket, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) )
 164                         {
 165                                 perror("setsockopt");
 166                                 return ;
 167                         }
 168                 }
 169
 170                 // Debug: Print the connection string
 171                 if(giDebugLevel >= 2) {
 172                         char    ipstr[INET_ADDRSTRLEN];
 173                         inet_ntop(AF_INET, &client_addr.sin_addr, ipstr, INET_ADDRSTRLEN);
 174                         printf("Client connection from %s:%i\n",
 175                                 ipstr, ntohs(client_addr.sin_port));
 176                 }
 177
 178                 // Doesn't matter what, localhost is trusted
 179                 if( ntohl( client_addr.sin_addr.s_addr ) == 0x7F000001 )
 180                         bTrusted = 1;
 181
 182                 // Trusted Connections
 183                 if( ntohs(client_addr.sin_port) < 1024 )
 184                 {
 185                         // TODO: Make this runtime configurable
 186                         switch( ntohl( client_addr.sin_addr.s_addr ) )
 187                         {
 188                         case 0x7F000001:        // 127.0.0.1    localhost
 189                 //      case 0x825F0D00:        // 130.95.13.0
 190                         case 0x825F0D07:        // 130.95.13.7  motsugo
 191                         case 0x825F0D11:        // 130.95.13.17 mermaid
 192                         case 0x825F0D12:        // 130.95.13.18 mussel
 193                         case 0x825F0D17:        // 130.95.13.23 martello
 194                         case 0x825F0D42:        // 130.95.13.66 heathred
 195                                 bTrusted = 1;
 196                                 break;
 197                         default:
 198                                 break;
 199                         }
 200                 }
 201
 202                 // TODO: Multithread this?
 203                 Server_HandleClient(client_socket, bTrusted);
 204
 205                 close(client_socket);
 206         }
 207 }
 208
 209 void Server_Cleanup(void)
 210 {
 211         printf("Close(%i)\n", giServer_Socket);
 212         close(giServer_Socket);
 213 }
 214
 215 /**
 216  * \brief Reads from a client socket and parses the command strings
 217  * \param Socket        Client socket number/handle
 218  * \param bTrusted      Is the client trusted?
 219  */
 220 void Server_HandleClient(int Socket, int bTrusted)
 221 {
 222         char    inbuf[INPUT_BUFFER_SIZE];
 223         char    *buf = inbuf;
 224          int    remspace = INPUT_BUFFER_SIZE-1;
 225          int    bytes = -1;
 226         tClient clientInfo;
 227
 228         memset(&clientInfo, 0, sizeof(clientInfo));
 229
 230         // Initialise Client info
 231         clientInfo.Socket = Socket;
 232         clientInfo.ID = giServer_NextClientID ++;
 233         clientInfo.bIsTrusted = bTrusted;
 234         clientInfo.EffectiveUID = -1;
 235
 236         // Read from client
 237         /*
 238          * Notes:
 239          * - The `buf` and `remspace` variables allow a line to span several
 240          *   calls to recv(), if a line is not completed in one recv() call
 241          *   it is saved to the beginning of `inbuf` and `buf` is updated to
 242          *   the end of it.
 243          */
 244         // TODO: Use select() instead (to give a timeout)
 245         while( (bytes = recv(Socket, buf, remspace, 0)) > 0 )
 246         {
 247                 char    *eol, *start;
 248                 buf[bytes] = '\0';      // Allow us to use stdlib string functions on it
 249
 250                 // Split by lines
 251                 start = inbuf;
 252                 while( (eol = strchr(start, '\n')) )
 253                 {
 254                         *eol = '\0';
 255
 256                         Server_ParseClientCommand(&clientInfo, start);
 257
 258                         start = eol + 1;
 259                 }
 260
 261                 // Check if there was an incomplete line
 262                 if( *start != '\0' ) {
 263                          int    tailBytes = bytes - (start-buf);
 264                         // Roll back in buffer
 265                         memcpy(inbuf, start, tailBytes);
 266                         remspace -= tailBytes;
 267                         if(remspace == 0) {
 268                                 send(Socket, MSG_STR_TOO_LONG, sizeof(MSG_STR_TOO_LONG), 0);
 269                                 buf = inbuf;
 270                                 remspace = INPUT_BUFFER_SIZE - 1;
 271                         }
 272                 }
 273                 else {
 274                         buf = inbuf;
 275                         remspace = INPUT_BUFFER_SIZE - 1;
 276                 }
 277         }
 278
 279         // Check for errors
 280         if( bytes < 0 ) {
 281                 fprintf(stderr, "ERROR: Unable to recieve from client on socket %i\n", Socket);
 282                 return ;
 283         }
 284
 285         if(giDebugLevel >= 2) {
 286                 printf("Client %i: Disconnected\n", clientInfo.ID);
 287         }
 288 }
 289
 290 /**
 291  * \brief Parses a client command and calls the required helper function
 292  * \param Client        Pointer to client state structure
 293  * \param CommandString Command from client (single line of the command)
 294  * \return Heap String to return to the client
 295  */
 296 void Server_ParseClientCommand(tClient *Client, char *CommandString)
 297 {
 298         char    *command, *args;
 299          int    i;
 300
 301         if( giDebugLevel >= 2 )
 302                 Debug(Client, "Server_ParseClientCommand: (CommandString = '%s')", CommandString);
 303
 304         if( Server_int_ParseArgs(1, CommandString, &command, &args, NULL) )
 305         {
 306                 printf("command=%s, args=%s\n", command, args);
 307                 // Is this an error? (just ignore for now)
 308                 //args = "";
 309         }
 310
 311
 312         // Find command
 313         for( i = 0; i < NUM_COMMANDS; i++ )
 314         {
 315                 if(strcmp(command, gaServer_Commands[i].Name) == 0) {
 316                         if( giDebugLevel >= 2 )
 317                                 Debug(Client, "CMD %s - \"%s\"", command, args);
 318                         gaServer_Commands[i].Function(Client, args);
 319                         return ;
 320                 }
 321         }
 322
 323         sendf(Client->Socket, "400 Unknown Command\n");
 324 }
 325
 326 // ---
 327 // Commands
 328 // ---
 329 /**
 330  * \brief Set client username
 331  *
 332  * Usage: USER <username>
 333  */
 334 void Server_Cmd_USER(tClient *Client, char *Args)
 335 {
 336         char    *username;
 337
 338         if( Server_int_ParseArgs(0, Args, &username, NULL) )
 339         {
 340                 sendf(Client->Socket, "407 USER takes 1 argument\n");
 341                 return ;
 342         }
 343
 344         // Debug!
 345         if( giDebugLevel )
 346                 Debug(Client, "Authenticating as '%s'", username);
 347
 348         // Save username
 349         if(Client->Username)
 350                 free(Client->Username);
 351         Client->Username = strdup(username);
 352
 353         #if USE_SALT
 354         // Create a salt (that changes if the username is changed)
 355         // Yes, I know, I'm a little paranoid, but who isn't?
 356         Client->Salt[0] = 0x21 + (rand()&0x3F);
 357         Client->Salt[1] = 0x21 + (rand()&0x3F);
 358         Client->Salt[2] = 0x21 + (rand()&0x3F);
 359         Client->Salt[3] = 0x21 + (rand()&0x3F);
 360         Client->Salt[4] = 0x21 + (rand()&0x3F);
 361         Client->Salt[5] = 0x21 + (rand()&0x3F);
 362         Client->Salt[6] = 0x21 + (rand()&0x3F);
 363         Client->Salt[7] = 0x21 + (rand()&0x3F);
 364
 365         // TODO: Also send hash type to use, (SHA1 or crypt according to [DAA])
 366         sendf(Client->Socket, "100 SALT %s\n", Client->Salt);
 367         #else
 368         sendf(Client->Socket, "100 User Set\n");
 369         #endif
 370 }
 371
 372 /**
 373  * \brief Authenticate as a user
 374  *
 375  * Usage: PASS <hash>
 376  */
 377 void Server_Cmd_PASS(tClient *Client, char *Args)
 378 {
 379         char    *passhash;
 380
 381         if( Server_int_ParseArgs(0, Args, &passhash, NULL) )
 382         {
 383                 sendf(Client->Socket, "407 PASS takes 1 argument\n");
 384                 return ;
 385         }
 386
 387         // Pass on to cokebank
 388         Client->UID = Bank_GetUserAuth(Client->Salt, Client->Username, passhash);
 389
 390         if( Client->UID != -1 ) {
 391                 Client->bIsAuthed = 1;
 392                 sendf(Client->Socket, "200 Auth OK\n");
 393                 return ;
 394         }
 395
 396         sendf(Client->Socket, "401 Auth Failure\n");
 397 }
 398
 399 /**
 400  * \brief Authenticate as a user without a password
 401  *
 402  * Usage: AUTOAUTH <user>
 403  */
 404 void Server_Cmd_AUTOAUTH(tClient *Client, char *Args)
 405 {
 406         char    *username;
 407
 408         if( Server_int_ParseArgs(0, Args, &username, NULL) )
 409         {
 410                 sendf(Client->Socket, "407 AUTOAUTH takes 1 argument\n");
 411                 return ;
 412         }
 413
 414         // Check if trusted
 415         if( !Client->bIsTrusted ) {
 416                 if(giDebugLevel)
 417                         Debug(Client, "Untrusted client attempting to AUTOAUTH");
 418                 sendf(Client->Socket, "401 Untrusted\n");
 419                 return ;
 420         }
 421
 422         // Get UID
 423         Client->UID = Bank_GetAcctByName( username );
 424         if( Client->UID < 0 ) {
 425                 if(giDebugLevel)
 426                         Debug(Client, "Unknown user '%s'", username);
 427                 sendf(Client->Socket, "401 Auth Failure\n");
 428                 return ;
 429         }
 430
 431         // You can't be an internal account
 432         if( Bank_GetFlags(Client->UID) & USER_FLAG_INTERNAL ) {
 433                 if(giDebugLevel)
 434                         Debug(Client, "Autoauth as '%s', not allowed", username);
 435                 Client->UID = -1;
 436                 sendf(Client->Socket, "401 Auth Failure\n");
 437                 return ;
 438         }
 439
 440         Client->bIsAuthed = 1;
 441
 442         if(giDebugLevel)
 443                 Debug(Client, "Auto authenticated as '%s' (%i)", username, Client->UID);
 444
 445         sendf(Client->Socket, "200 Auth OK\n");
 446 }
 447
 448 /**
 449  * \brief Set effective user
 450  */
 451 void Server_Cmd_SETEUSER(tClient *Client, char *Args)
 452 {
 453         char    *username;
 454
 455         if( Server_int_ParseArgs(0, Args, &username, NULL) )
 456         {
 457                 sendf(Client->Socket, "407 SETEUSER takes 1 argument\n");
 458                 return ;
 459         }
 460
 461         if( !strlen(Args) ) {
 462                 sendf(Client->Socket, "407 SETEUSER expects an argument\n");
 463                 return ;
 464         }
 465
 466         // Check user permissions
 467         if( !(Bank_GetFlags(Client->UID) & (USER_FLAG_COKE|USER_FLAG_ADMIN)) ) {
 468                 sendf(Client->Socket, "403 Not in coke\n");
 469                 return ;
 470         }
 471
 472         // Set id
 473         Client->EffectiveUID = Bank_GetAcctByName(username);
 474         if( Client->EffectiveUID == -1 ) {
 475                 sendf(Client->Socket, "404 User not found\n");
 476                 return ;
 477         }
 478
 479         // You can't be an internal account
 480         if( Bank_GetFlags(Client->EffectiveUID) & USER_FLAG_INTERNAL ) {
 481                 Client->EffectiveUID = -1;
 482                 sendf(Client->Socket, "404 User not found\n");
 483                 return ;
 484         }
 485
 486         sendf(Client->Socket, "200 User set\n");
 487 }
 488
 489 /**
 490  * \brief Send an item status to the client
 491  * \param Client        Who to?
 492  * \param Item  Item to send
 493  */
 494 void Server_int_SendItem(tClient *Client, tItem *Item)
 495 {
 496         char    *status = "avail";
 497
 498         if( Item->Handler->CanDispense )
 499         {
 500                 switch(Item->Handler->CanDispense(Client->UID, Item->ID))
 501                 {
 502                 case  0:        status = "avail";       break;
 503                 case  1:        status = "sold";        break;
 504                 default:
 505                 case -1:        status = "error";       break;
 506                 }
 507         }
 508
 509         sendf(Client->Socket,
 510                 "202 Item %s:%i %s %i %s\n",
 511                 Item->Handler->Name, Item->ID, status, Item->Price, Item->Name
 512                 );
 513 }
 514
 515 /**
 516  * \brief Enumerate the items that the server knows about
 517  */
 518 void Server_Cmd_ENUMITEMS(tClient *Client, char *Args)
 519 {
 520          int    i, count;
 521
 522         if( Args != NULL && strlen(Args) ) {
 523                 sendf(Client->Socket, "407 ENUM_ITEMS takes no arguments\n");
 524                 return ;
 525         }
 526
 527         // Count shown items
 528         count = 0;
 529         for( i = 0; i < giNumItems; i ++ ) {
 530                 if( gaItems[i].bHidden )        continue;
 531                 count ++;
 532         }
 533
 534         sendf(Client->Socket, "201 Items %i\n", count);
 535
 536         for( i = 0; i < giNumItems; i ++ ) {
 537                 if( gaItems[i].bHidden )        continue;
 538                 Server_int_SendItem( Client, &gaItems[i] );
 539         }
 540
 541         sendf(Client->Socket, "200 List end\n");
 542 }
 543
 544 tItem *_GetItemFromString(char *String)
 545 {
 546         tHandler        *handler;
 547         char    *type = String;
 548         char    *colon = strchr(String, ':');
 549          int    num, i;
 550
 551         if( !colon ) {
 552                 return NULL;
 553         }
 554
 555         num = atoi(colon+1);
 556         *colon = '\0';
 557
 558         // Find handler
 559         handler = NULL;
 560         for( i = 0; i < giNumHandlers; i ++ )
 561         {
 562                 if( strcmp(gaHandlers[i]->Name, type) == 0) {
 563                         handler = gaHandlers[i];
 564                         break;
 565                 }
 566         }
 567         if( !handler ) {
 568                 return NULL;
 569         }
 570
 571         // Find item
 572         for( i = 0; i < giNumItems; i ++ )
 573         {
 574                 if( gaItems[i].Handler != handler )     continue;
 575                 if( gaItems[i].ID != num )      continue;
 576                 return &gaItems[i];
 577         }
 578         return NULL;
 579 }
 580
 581 /**
 582  * \brief Fetch information on a specific item
 583  */
 584 void Server_Cmd_ITEMINFO(tClient *Client, char *Args)
 585 {
 586         tItem   *item;
 587         char    *itemname;
 588
 589         if( Server_int_ParseArgs(0, Args, &itemname, NULL) ) {
 590                 sendf(Client->Socket, "407 ITEMINFO takes 1 argument\n");
 591                 return ;
 592         }
 593         item = _GetItemFromString(Args);
 594
 595         if( !item ) {
 596                 sendf(Client->Socket, "406 Bad Item ID\n");
 597                 return ;
 598         }
 599
 600         Server_int_SendItem( Client, item );
 601 }
 602
 603 void Server_Cmd_DISPENSE(tClient *Client, char *Args)
 604 {
 605         tItem   *item;
 606          int    ret;
 607          int    uid;
 608         char    *itemname;
 609
 610         if( Server_int_ParseArgs(0, Args, &itemname, NULL) ) {
 611                 sendf(Client->Socket, "407 DISPENSE takes only 1 argument\n");
 612                 return ;
 613         }
 614
 615         if( !Client->bIsAuthed ) {
 616                 sendf(Client->Socket, "401 Not Authenticated\n");
 617                 return ;
 618         }
 619
 620         item = _GetItemFromString(itemname);
 621         if( !item ) {
 622                 sendf(Client->Socket, "406 Bad Item ID\n");
 623                 return ;
 624         }
 625
 626         if( Client->EffectiveUID != -1 ) {
 627                 uid = Client->EffectiveUID;
 628         }
 629         else {
 630                 uid = Client->UID;
 631         }
 632
 633         switch( ret = DispenseItem( Client->UID, uid, item ) )
 634         {
 635         case 0: sendf(Client->Socket, "200 Dispense OK\n");     return ;
 636         case 1: sendf(Client->Socket, "501 Unable to dispense\n");      return ;
 637         case 2: sendf(Client->Socket, "402 Poor You\n");        return ;
 638         default:
 639                 sendf(Client->Socket, "500 Dispense Error\n");
 640                 return ;
 641         }
 642 }
 643
 644 void Server_Cmd_GIVE(tClient *Client, char *Args)
 645 {
 646         char    *recipient, *ammount, *reason;
 647          int    uid, iAmmount;
 648          int    thisUid;
 649
 650         // Parse arguments
 651         if( Server_int_ParseArgs(1, Args, &recipient, &ammount, &reason, NULL) ) {
 652                 sendf(Client->Socket, "407 GIVE takes only 3 arguments\n");
 653                 return ;
 654         }
 655         // Check for authed
 656         if( !Client->bIsAuthed ) {
 657                 sendf(Client->Socket, "401 Not Authenticated\n");
 658                 return ;
 659         }
 660
 661         // Get recipient
 662         uid = Bank_GetAcctByName(recipient);
 663         if( uid == -1 ) {
 664                 sendf(Client->Socket, "404 Invalid target user\n");
 665                 return ;
 666         }
 667
 668         // You can't alter an internal account
 669         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 670                 sendf(Client->Socket, "404 Invalid target user\n");
 671                 return ;
 672         }
 673
 674         // Parse ammount
 675         iAmmount = atoi(ammount);
 676         if( iAmmount <= 0 ) {
 677                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 678                 return ;
 679         }
 680
 681         if( Client->EffectiveUID != -1 ) {
 682                 thisUid = Client->EffectiveUID;
 683         }
 684         else {
 685                 thisUid = Client->UID;
 686         }
 687
 688         // Do give
 689         switch( DispenseGive(Client->UID, thisUid, uid, iAmmount, reason) )
 690         {
 691         case 0:
 692                 sendf(Client->Socket, "200 Give OK\n");
 693                 return ;
 694         case 2:
 695                 sendf(Client->Socket, "402 Poor You\n");
 696                 return ;
 697         default:
 698                 sendf(Client->Socket, "500 Unknown error\n");
 699                 return ;
 700         }
 701 }
 702
 703 void Server_Cmd_DONATE(tClient *Client, char *Args)
 704 {
 705         char    *ammount, *reason;
 706          int    iAmmount;
 707          int    thisUid;
 708
 709         // Parse arguments
 710         if( Server_int_ParseArgs(1, Args, &ammount, &reason, NULL) ) {
 711                 sendf(Client->Socket, "407 DONATE takes 2 arguments\n");
 712                 return ;
 713         }
 714
 715         if( !Client->bIsAuthed ) {
 716                 sendf(Client->Socket, "401 Not Authenticated\n");
 717                 return ;
 718         }
 719
 720         // Parse ammount
 721         iAmmount = atoi(ammount);
 722         if( iAmmount <= 0 ) {
 723                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 724                 return ;
 725         }
 726
 727         // Handle effective users
 728         if( Client->EffectiveUID != -1 ) {
 729                 thisUid = Client->EffectiveUID;
 730         }
 731         else {
 732                 thisUid = Client->UID;
 733         }
 734
 735         // Do give
 736         switch( DispenseDonate(Client->UID, thisUid, iAmmount, reason) )
 737         {
 738         case 0:
 739                 sendf(Client->Socket, "200 Give OK\n");
 740                 return ;
 741         case 2:
 742                 sendf(Client->Socket, "402 Poor You\n");
 743                 return ;
 744         default:
 745                 sendf(Client->Socket, "500 Unknown error\n");
 746                 return ;
 747         }
 748 }
 749
 750 void Server_Cmd_ADD(tClient *Client, char *Args)
 751 {
 752         char    *user, *ammount, *reason;
 753          int    uid, iAmmount;
 754
 755         // Parse arguments
 756         if( Server_int_ParseArgs(1, Args, &user, &ammount, &reason, NULL) ) {
 757                 sendf(Client->Socket, "407 ADD takes 3 arguments\n");
 758                 return ;
 759         }
 760
 761         if( !Client->bIsAuthed ) {
 762                 sendf(Client->Socket, "401 Not Authenticated\n");
 763                 return ;
 764         }
 765
 766         // Check user permissions
 767         if( !(Bank_GetFlags(Client->UID) & (USER_FLAG_COKE|USER_FLAG_ADMIN))  ) {
 768                 sendf(Client->Socket, "403 Not in coke\n");
 769                 return ;
 770         }
 771
 772         // Get recipient
 773         uid = Bank_GetAcctByName(user);
 774         if( uid == -1 ) {
 775                 sendf(Client->Socket, "404 Invalid user\n");
 776                 return ;
 777         }
 778
 779         // You can't alter an internal account
 780         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 781                 sendf(Client->Socket, "404 Invalid user\n");
 782                 return ;
 783         }
 784
 785         // Parse ammount
 786         iAmmount = atoi(ammount);
 787         if( iAmmount == 0 && ammount[0] != '0' ) {
 788                 sendf(Client->Socket, "407 Invalid Argument\n");
 789                 return ;
 790         }
 791
 792         // Do give
 793         switch( DispenseAdd(Client->UID, uid, iAmmount, reason) )
 794         {
 795         case 0:
 796                 sendf(Client->Socket, "200 Add OK\n");
 797                 return ;
 798         case 2:
 799                 sendf(Client->Socket, "402 Poor Guy\n");
 800                 return ;
 801         default:
 802                 sendf(Client->Socket, "500 Unknown error\n");
 803                 return ;
 804         }
 805 }
 806
 807 void Server_Cmd_SET(tClient *Client, char *Args)
 808 {
 809         char    *user, *ammount, *reason;
 810          int    uid, iAmmount;
 811
 812         // Parse arguments
 813         if( Server_int_ParseArgs(1, Args, &user, &ammount, &reason, NULL) ) {
 814                 sendf(Client->Socket, "407 SET takes 3 arguments\n");
 815                 return ;
 816         }
 817
 818         if( !Client->bIsAuthed ) {
 819                 sendf(Client->Socket, "401 Not Authenticated\n");
 820                 return ;
 821         }
 822
 823         // Check user permissions
 824         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN)  ) {
 825                 sendf(Client->Socket, "403 Not an admin\n");
 826                 return ;
 827         }
 828
 829         // Get recipient
 830         uid = Bank_GetAcctByName(user);
 831         if( uid == -1 ) {
 832                 sendf(Client->Socket, "404 Invalid user\n");
 833                 return ;
 834         }
 835
 836         // You can't alter an internal account
 837         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 838                 sendf(Client->Socket, "404 Invalid user\n");
 839                 return ;
 840         }
 841
 842         // Parse ammount
 843         iAmmount = atoi(ammount);
 844         if( iAmmount == 0 && ammount[0] != '0' ) {
 845                 sendf(Client->Socket, "407 Invalid Argument\n");
 846                 return ;
 847         }
 848
 849         // Do give
 850         switch( DispenseSet(Client->UID, uid, iAmmount, reason) )
 851         {
 852         case 0:
 853                 sendf(Client->Socket, "200 Add OK\n");
 854                 return ;
 855         case 2:
 856                 sendf(Client->Socket, "402 Poor Guy\n");
 857                 return ;
 858         default:
 859                 sendf(Client->Socket, "500 Unknown error\n");
 860                 return ;
 861         }
 862 }
 863
 864 void Server_Cmd_ENUMUSERS(tClient *Client, char *Args)
 865 {
 866          int    i, numRet = 0;
 867         tAcctIterator   *it;
 868          int    maxBal = INT_MAX, minBal = INT_MIN;
 869          int    flagMask = 0, flagVal = 0;
 870          int    sort = BANK_ITFLAG_SORT_NAME;
 871         time_t  lastSeenAfter=0, lastSeenBefore=0;
 872
 873          int    flags;  // Iterator flags
 874          int    balValue;       // Balance value for iterator
 875         time_t  timeValue;      // Time value for iterator
 876
 877         // Parse arguments
 878         if( Args && strlen(Args) )
 879         {
 880                 char    *space = Args, *type, *val;
 881                 do
 882                 {
 883                         type = space;
 884                         while(*type == ' ')     type ++;
 885                         // Get next space
 886                         space = strchr(space, ' ');
 887                         if(space)       *space = '\0';
 888
 889                         // Get type
 890                         val = strchr(type, ':');
 891                         if( val ) {
 892                                 *val = '\0';
 893                                 val ++;
 894
 895                                 // Types
 896                                 // - Minium Balance
 897                                 if( strcmp(type, "min_balance") == 0 ) {
 898                                         minBal = atoi(val);
 899                                 }
 900                                 // - Maximum Balance
 901                                 else if( strcmp(type, "max_balance") == 0 ) {
 902                                         maxBal = atoi(val);
 903                                 }
 904                                 // - Flags
 905                                 else if( strcmp(type, "flags") == 0 ) {
 906                                         if( Server_int_ParseFlags(Client, val, &flagMask, &flagVal) )
 907                                                 return ;
 908                                 }
 909                                 // - Last seen before timestamp
 910                                 else if( strcmp(type, "last_seen_before") == 0 ) {
 911                                         lastSeenAfter = atoll(val);
 912                                 }
 913                                 // - Last seen after timestamp
 914                                 else if( strcmp(type, "last_seen_after") == 0 ) {
 915                                         lastSeenAfter = atoll(val);
 916                                 }
 917                                 // - Sorting
 918                                 else if( strcmp(type, "sort") == 0 ) {
 919                                         char    *dash = strchr(val, '-');
 920                                         if( dash ) {
 921                                                 *dash = '\0';
 922                                                 dash ++;
 923                                         }
 924                                         if( strcmp(val, "name") == 0 ) {
 925                                                 sort = BANK_ITFLAG_SORT_NAME;
 926                                         }
 927                                         else if( strcmp(val, "balance") == 0 ) {
 928                                                 sort = BANK_ITFLAG_SORT_BAL;
 929                                         }
 930                                         else if( strcmp(val, "lastseen") == 0 ) {
 931                                                 sort = BANK_ITFLAG_SORT_LASTSEEN;
 932                                         }
 933                                         else {
 934                                                 sendf(Client->Socket, "407 Unknown sort field ('%s')\n", val);
 935                                                 return ;
 936                                         }
 937                                         // Handle sort direction
 938                                         if( dash ) {
 939                                                 if( strcmp(dash, "desc") == 0 ) {
 940                                                         sort |= BANK_ITFLAG_REVSORT;
 941                                                 }
 942                                                 else {
 943                                                         sendf(Client->Socket, "407 Unknown sort direction '%s'\n", dash);
 944                                                         return ;
 945                                                 }
 946                                                 dash[-1] = '-';
 947                                         }
 948                                 }
 949                                 else {
 950                                         sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s:%s'\n", type, val);
 951                                         return ;
 952                                 }
 953
 954                                 val[-1] = ':';
 955                         }
 956                         else {
 957                                 sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s'\n", type);
 958                                 return ;
 959                         }
 960
 961                         // Eat whitespace
 962                         if( space ) {
 963                                 *space = ' ';   // Repair (to be nice)
 964                                 space ++;
 965                                 while(*space == ' ')    space ++;
 966                         }
 967                 }       while(space);
 968         }
 969
 970         // Create iterator
 971         if( maxBal != INT_MAX ) {
 972                 flags = sort|BANK_ITFLAG_MAXBALANCE;
 973                 balValue = maxBal;
 974         }
 975         else if( minBal != INT_MIN ) {
 976                 flags = sort|BANK_ITFLAG_MINBALANCE;
 977                 balValue = minBal;
 978         }
 979         else {
 980                 flags = sort;
 981                 balValue = 0;
 982         }
 983         if( lastSeenBefore ) {
 984                 timeValue = lastSeenBefore;
 985                 flags |= BANK_ITFLAG_SEENBEFORE;
 986         }
 987         else if( lastSeenAfter ) {
 988                 timeValue = lastSeenAfter;
 989                 flags |= BANK_ITFLAG_SEENAFTER;
 990         }
 991         else {
 992                 timeValue = 0;
 993         }
 994         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
 995
 996         // Get return number
 997         while( (i = Bank_IteratorNext(it)) != -1 )
 998         {
 999                 int bal = Bank_GetBalance(i);
1000
1001                 if( bal == INT_MIN )    continue;
1002
1003                 if( bal < minBal )      continue;
1004                 if( bal > maxBal )      continue;
1005
1006                 numRet ++;
1007         }
1008
1009         Bank_DelIterator(it);
1010
1011         // Send count
1012         sendf(Client->Socket, "201 Users %i\n", numRet);
1013
1014
1015         // Create iterator
1016         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
1017
1018         while( (i = Bank_IteratorNext(it)) != -1 )
1019         {
1020                 int bal = Bank_GetBalance(i);
1021
1022                 if( bal == INT_MIN )    continue;
1023
1024                 if( bal < minBal )      continue;
1025                 if( bal > maxBal )      continue;
1026
1027                 _SendUserInfo(Client, i);
1028         }
1029
1030         Bank_DelIterator(it);
1031
1032         sendf(Client->Socket, "200 List End\n");
1033 }
1034
1035 void Server_Cmd_USERINFO(tClient *Client, char *Args)
1036 {
1037          int    uid;
1038         char    *user;
1039
1040         // Parse arguments
1041         if( Server_int_ParseArgs(0, Args, &user, NULL) ) {
1042                 sendf(Client->Socket, "407 USER_INFO takes 1 argument\n");
1043                 return ;
1044         }
1045
1046         if( giDebugLevel )      Debug(Client, "User Info '%s'", user);
1047
1048         // Get recipient
1049         uid = Bank_GetAcctByName(user);
1050
1051         if( giDebugLevel >= 2 ) Debug(Client, "uid = %i", uid);
1052         if( uid == -1 ) {
1053                 sendf(Client->Socket, "404 Invalid user\n");
1054                 return ;
1055         }
1056
1057         _SendUserInfo(Client, uid);
1058 }
1059
1060 void _SendUserInfo(tClient *Client, int UserID)
1061 {
1062         char    *type, *disabled="", *door="";
1063          int    flags = Bank_GetFlags(UserID);
1064
1065         if( flags & USER_FLAG_INTERNAL ) {
1066                 type = "internal";
1067         }
1068         else if( flags & USER_FLAG_COKE ) {
1069                 if( flags & USER_FLAG_ADMIN )
1070                         type = "coke,admin";
1071                 else
1072                         type = "coke";
1073         }
1074         else if( flags & USER_FLAG_ADMIN ) {
1075                 type = "admin";
1076         }
1077         else {
1078                 type = "user";
1079         }
1080
1081         if( flags & USER_FLAG_DISABLED )
1082                 disabled = ",disabled";
1083         if( flags & USER_FLAG_DOORGROUP )
1084                 door = ",door";
1085
1086         // TODO: User flags/type
1087         sendf(
1088                 Client->Socket, "202 User %s %i %s%s%s\n",
1089                 Bank_GetAcctName(UserID), Bank_GetBalance(UserID),
1090                 type, disabled, door
1091                 );
1092 }
1093
1094 void Server_Cmd_USERADD(tClient *Client, char *Args)
1095 {
1096         char    *username;
1097
1098         // Parse arguments
1099         if( Server_int_ParseArgs(0, Args, &username, NULL) ) {
1100                 sendf(Client->Socket, "407 USER_ADD takes 1 argument\n");
1101                 return ;
1102         }
1103
1104         // Check permissions
1105         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1106                 sendf(Client->Socket, "403 Not a coke admin\n");
1107                 return ;
1108         }
1109
1110         // Try to create user
1111         if( Bank_CreateAcct(username) == -1 ) {
1112                 sendf(Client->Socket, "404 User exists\n");
1113                 return ;
1114         }
1115
1116         {
1117                 char    *thisName = Bank_GetAcctName(Client->UID);
1118                 Log_Info("Account '%s' created by '%s'", username, thisName);
1119                 free(thisName);
1120         }
1121
1122         sendf(Client->Socket, "200 User Added\n");
1123 }
1124
1125 void Server_Cmd_USERFLAGS(tClient *Client, char *Args)
1126 {
1127         char    *username, *flags;
1128          int    mask=0, value=0;
1129          int    uid;
1130
1131         // Parse arguments
1132         if( Server_int_ParseArgs(0, Args, &username, &flags, NULL) ) {
1133                 sendf(Client->Socket, "407 USER_FLAGS takes 2 arguments\n");
1134                 return ;
1135         }
1136
1137         // Check permissions
1138         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1139                 sendf(Client->Socket, "403 Not a coke admin\n");
1140                 return ;
1141         }
1142
1143         // Get UID
1144         uid = Bank_GetAcctByName(username);
1145         if( uid == -1 ) {
1146                 sendf(Client->Socket, "404 User '%s' not found\n", username);
1147                 return ;
1148         }
1149
1150         // Parse flags
1151         if( Server_int_ParseFlags(Client, flags, &mask, &value) )
1152                 return ;
1153
1154         if( giDebugLevel )
1155                 Debug(Client, "Set %i(%s) flags to %x (masked %x)\n",
1156                         uid, username, mask, value);
1157
1158         // Apply flags
1159         Bank_SetFlags(uid, mask, value);
1160
1161         // Return OK
1162         sendf(Client->Socket, "200 User Updated\n");
1163 }
1164
1165 // --- INTERNAL HELPERS ---
1166 void Debug(tClient *Client, const char *Format, ...)
1167 {
1168         va_list args;
1169         //printf("%010i [%i] ", (int)time(NULL), Client->ID);
1170         printf("[%i] ", Client->ID);
1171         va_start(args, Format);
1172         vprintf(Format, args);
1173         va_end(args);
1174         printf("\n");
1175 }
1176
1177 int sendf(int Socket, const char *Format, ...)
1178 {
1179         va_list args;
1180          int    len;
1181
1182         va_start(args, Format);
1183         len = vsnprintf(NULL, 0, Format, args);
1184         va_end(args);
1185
1186         {
1187                 char    buf[len+1];
1188                 va_start(args, Format);
1189                 vsnprintf(buf, len+1, Format, args);
1190                 va_end(args);
1191
1192                 #if DEBUG_TRACE_CLIENT
1193                 printf("sendf: %s", buf);
1194                 #endif
1195
1196                 return send(Socket, buf, len, 0);
1197         }
1198 }
1199
1200 // Takes a series of char *'s in
1201 /**
1202  * \brief Parse space-separated entries into
1203  */
1204 int Server_int_ParseArgs(int bUseLongLast, char *ArgStr, ...)
1205 {
1206         va_list args;
1207         char    savedChar;
1208         char    **dest;
1209         va_start(args, ArgStr);
1210
1211         // Check for null
1212         if( !ArgStr )
1213         {
1214                 while( (dest = va_arg(args, char **)) )
1215                         *dest = NULL;
1216                 va_end(args);
1217                 return 1;
1218         }
1219
1220         savedChar = *ArgStr;
1221
1222         while( (dest = va_arg(args, char **)) )
1223         {
1224                 printf(" dest = %p\n", dest);
1225                 // Trim leading spaces
1226                 while( *ArgStr == ' ' || *ArgStr == '\t' )
1227                         ArgStr ++;
1228
1229                 // ... oops, not enough arguments
1230                 if( *ArgStr == '\0' )
1231                 {
1232                         // NULL unset arguments
1233                         do {
1234                                 *dest = NULL;
1235                         }       while( (dest = va_arg(args, char **)) );
1236                 va_end(args);
1237                         return -1;
1238                 }
1239
1240                 if( *ArgStr == '"' )
1241                 {
1242                         ArgStr ++;
1243                         *dest = ArgStr;
1244                         // Read until quote
1245                         while( *ArgStr && *ArgStr != '"' )
1246                                 ArgStr ++;
1247                 }
1248                 else
1249                 {
1250                         // Set destination
1251                         *dest = ArgStr;
1252                         // Read until a space
1253                         while( *ArgStr && *ArgStr != ' ' && *ArgStr != '\t' )
1254                                 ArgStr ++;
1255                 }
1256                 savedChar = *ArgStr;    // savedChar is used to un-mangle the last string
1257                 *ArgStr = '\0';
1258                 ArgStr ++;
1259         }
1260         va_end(args);
1261
1262         // Oops, extra arguments, and greedy not set
1263         if( (savedChar == ' ' || savedChar == '\t') && !bUseLongLast ) {
1264                 return -1;
1265         }
1266
1267         // Un-mangle last
1268         if(bUseLongLast) {
1269                 ArgStr --;
1270                 *ArgStr = savedChar;
1271         }
1272
1273         return 0;       // Success!
1274 }
1275
1276 int Server_int_ParseFlags(tClient *Client, const char *Str, int *Mask, int *Value)
1277 {
1278         struct {
1279                 const char      *Name;
1280                  int    Mask;
1281                  int    Value;
1282         }       cFLAGS[] = {
1283                  {"disabled", USER_FLAG_DISABLED, USER_FLAG_DISABLED}
1284                 ,{"door", USER_FLAG_DOORGROUP, USER_FLAG_DOORGROUP}
1285                 ,{"coke", USER_FLAG_COKE, USER_FLAG_COKE}
1286                 ,{"admin", USER_FLAG_ADMIN, USER_FLAG_ADMIN}
1287                 ,{"internal", USER_FLAG_INTERNAL, USER_FLAG_INTERNAL}
1288         };
1289         const int       ciNumFlags = sizeof(cFLAGS)/sizeof(cFLAGS[0]);
1290
1291         char    *space;
1292
1293         *Mask = 0;
1294         *Value = 0;
1295
1296         do {
1297                  int    bRemove = 0;
1298                  int    i;
1299                  int    len;
1300
1301                 while( *Str == ' ' )    Str ++; // Eat whitespace
1302                 space = strchr(Str, ',');       // Find the end of the flag
1303                 if(space)
1304                         len = space - Str;
1305                 else
1306                         len = strlen(Str);
1307
1308                 // Check for inversion/removal
1309                 if( *Str == '!' || *Str == '-' ) {
1310                         bRemove = 1;
1311                         Str ++;
1312                 }
1313                 else if( *Str == '+' ) {
1314                         Str ++;
1315                 }
1316
1317                 // Check flag values
1318                 for( i = 0; i < ciNumFlags; i ++ )
1319                 {
1320                         if( strncmp(Str, cFLAGS[i].Name, len) == 0 ) {
1321                                 *Mask |= cFLAGS[i].Mask;
1322                                 *Value &= ~cFLAGS[i].Mask;
1323                                 if( !bRemove )
1324                                         *Value |= cFLAGS[i].Value;
1325                                 break;
1326                         }
1327                 }
1328
1329                 // Error check
1330                 if( i == ciNumFlags ) {
1331                         char    val[len+1];
1332                         strncpy(val, Str, len+1);
1333                         sendf(Client->Socket, "407 Unknown flag value '%s'\n", val);
1334                         return -1;
1335                 }
1336
1337                 Str = space + 1;
1338         } while(space);
1339
1340         return 0;
1341 }