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    Server_int_ParseFlags(tClient *Client, const char *Str, int *Mask, int *Value);
  74  int    sendf(int Socket, const char *Format, ...);
  75
  76 // === CONSTANTS ===
  77 // - Commands
  78 const struct sClientCommand {
  79         const char      *Name;
  80         void    (*Function)(tClient *Client, char *Arguments);
  81 }       gaServer_Commands[] = {
  82         {"USER", Server_Cmd_USER},
  83         {"PASS", Server_Cmd_PASS},
  84         {"AUTOAUTH", Server_Cmd_AUTOAUTH},
  85         {"SETEUSER", Server_Cmd_SETEUSER},
  86         {"ENUM_ITEMS", Server_Cmd_ENUMITEMS},
  87         {"ITEM_INFO", Server_Cmd_ITEMINFO},
  88         {"DISPENSE", Server_Cmd_DISPENSE},
  89         {"GIVE", Server_Cmd_GIVE},
  90         {"DONATE", Server_Cmd_DONATE},
  91         {"ADD", Server_Cmd_ADD},
  92         {"SET", Server_Cmd_SET},
  93         {"ENUM_USERS", Server_Cmd_ENUMUSERS},
  94         {"USER_INFO", Server_Cmd_USERINFO},
  95         {"USER_ADD", Server_Cmd_USERADD},
  96         {"USER_FLAGS", Server_Cmd_USERFLAGS}
  97 };
  98 #define NUM_COMMANDS    ((int)(sizeof(gaServer_Commands)/sizeof(gaServer_Commands[0])))
  99
 100 // === GLOBALS ===
 101  int    giServer_Port = 1020;
 102  int    giServer_NextClientID = 1;
 103  int    giServer_Socket;
 104
 105 // === CODE ===
 106 /**
 107  * \brief Open listenting socket and serve connections
 108  */
 109 void Server_Start(void)
 110 {
 111          int    client_socket;
 112         struct sockaddr_in      server_addr, client_addr;
 113
 114         atexit(Server_Cleanup);
 115
 116         // Create Server
 117         giServer_Socket = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 118         if( giServer_Socket < 0 ) {
 119                 fprintf(stderr, "ERROR: Unable to create server socket\n");
 120                 return ;
 121         }
 122
 123         // Make listen address
 124         memset(&server_addr, 0, sizeof(server_addr));
 125         server_addr.sin_family = AF_INET;       // Internet Socket
 126         server_addr.sin_addr.s_addr = htonl(INADDR_ANY);        // Listen on all interfaces
 127         server_addr.sin_port = htons(giServer_Port);    // Port
 128
 129         // Bind
 130         if( bind(giServer_Socket, (struct sockaddr *) &server_addr, sizeof(server_addr)) < 0 ) {
 131                 fprintf(stderr, "ERROR: Unable to bind to 0.0.0.0:%i\n", giServer_Port);
 132                 perror("Binding");
 133                 return ;
 134         }
 135
 136         // Listen
 137         if( listen(giServer_Socket, MAX_CONNECTION_QUEUE) < 0 ) {
 138                 fprintf(stderr, "ERROR: Unable to listen to socket\n");
 139                 perror("Listen");
 140                 return ;
 141         }
 142
 143         printf("Listening on 0.0.0.0:%i\n", giServer_Port);
 144
 145         for(;;)
 146         {
 147                 uint    len = sizeof(client_addr);
 148                  int    bTrusted = 0;
 149
 150                 // Accept a connection
 151                 client_socket = accept(giServer_Socket, (struct sockaddr *) &client_addr, &len);
 152                 if(client_socket < 0) {
 153                         fprintf(stderr, "ERROR: Unable to accept client connection\n");
 154                         return ;
 155                 }
 156
 157                 // Set a timeout on the user conneciton
 158                 {
 159                         struct timeval tv;
 160                         tv.tv_sec = CLIENT_TIMEOUT;
 161                         tv.tv_usec = 0;
 162                         if( setsockopt(client_socket, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) )
 163                         {
 164                                 perror("setsockopt");
 165                                 return ;
 166                         }
 167                 }
 168
 169                 // Debug: Print the connection string
 170                 if(giDebugLevel >= 2) {
 171                         char    ipstr[INET_ADDRSTRLEN];
 172                         inet_ntop(AF_INET, &client_addr.sin_addr, ipstr, INET_ADDRSTRLEN);
 173                         printf("Client connection from %s:%i\n",
 174                                 ipstr, ntohs(client_addr.sin_port));
 175                 }
 176
 177                 // Doesn't matter what, localhost is trusted
 178                 if( ntohl( client_addr.sin_addr.s_addr ) == 0x7F000001 )
 179                         bTrusted = 1;
 180
 181                 // Trusted Connections
 182                 if( ntohs(client_addr.sin_port) < 1024 )
 183                 {
 184                         // TODO: Make this runtime configurable
 185                         switch( ntohl( client_addr.sin_addr.s_addr ) )
 186                         {
 187                         case 0x7F000001:        // 127.0.0.1    localhost
 188                         //case 0x825E0D00:      // 130.95.13.0
 189                         case 0x825E0D07:        // 130.95.13.7  motsugo
 190                         case 0x825E0D12:        // 130.95.13.18 mussel
 191                         case 0x825E0D17:        // 130.95.13.23 martello
 192                                 bTrusted = 1;
 193                                 break;
 194                         default:
 195                                 break;
 196                         }
 197                 }
 198
 199                 // TODO: Multithread this?
 200                 Server_HandleClient(client_socket, bTrusted);
 201
 202                 close(client_socket);
 203         }
 204 }
 205
 206 void Server_Cleanup(void)
 207 {
 208         printf("Close(%i)\n", giServer_Socket);
 209         close(giServer_Socket);
 210 }
 211
 212 /**
 213  * \brief Reads from a client socket and parses the command strings
 214  * \param Socket        Client socket number/handle
 215  * \param bTrusted      Is the client trusted?
 216  */
 217 void Server_HandleClient(int Socket, int bTrusted)
 218 {
 219         char    inbuf[INPUT_BUFFER_SIZE];
 220         char    *buf = inbuf;
 221          int    remspace = INPUT_BUFFER_SIZE-1;
 222          int    bytes = -1;
 223         tClient clientInfo;
 224
 225         memset(&clientInfo, 0, sizeof(clientInfo));
 226
 227         // Initialise Client info
 228         clientInfo.Socket = Socket;
 229         clientInfo.ID = giServer_NextClientID ++;
 230         clientInfo.bIsTrusted = bTrusted;
 231         clientInfo.EffectiveUID = -1;
 232
 233         // Read from client
 234         /*
 235          * Notes:
 236          * - The `buf` and `remspace` variables allow a line to span several
 237          *   calls to recv(), if a line is not completed in one recv() call
 238          *   it is saved to the beginning of `inbuf` and `buf` is updated to
 239          *   the end of it.
 240          */
 241         // TODO: Use select() instead (to give a timeout)
 242         while( (bytes = recv(Socket, buf, remspace, 0)) > 0 )
 243         {
 244                 char    *eol, *start;
 245                 buf[bytes] = '\0';      // Allow us to use stdlib string functions on it
 246
 247                 // Split by lines
 248                 start = inbuf;
 249                 while( (eol = strchr(start, '\n')) )
 250                 {
 251                         *eol = '\0';
 252
 253                         Server_ParseClientCommand(&clientInfo, start);
 254
 255                         start = eol + 1;
 256                 }
 257
 258                 // Check if there was an incomplete line
 259                 if( *start != '\0' ) {
 260                          int    tailBytes = bytes - (start-buf);
 261                         // Roll back in buffer
 262                         memcpy(inbuf, start, tailBytes);
 263                         remspace -= tailBytes;
 264                         if(remspace == 0) {
 265                                 send(Socket, MSG_STR_TOO_LONG, sizeof(MSG_STR_TOO_LONG), 0);
 266                                 buf = inbuf;
 267                                 remspace = INPUT_BUFFER_SIZE - 1;
 268                         }
 269                 }
 270                 else {
 271                         buf = inbuf;
 272                         remspace = INPUT_BUFFER_SIZE - 1;
 273                 }
 274         }
 275
 276         // Check for errors
 277         if( bytes < 0 ) {
 278                 fprintf(stderr, "ERROR: Unable to recieve from client on socket %i\n", Socket);
 279                 return ;
 280         }
 281
 282         if(giDebugLevel >= 2) {
 283                 printf("Client %i: Disconnected\n", clientInfo.ID);
 284         }
 285 }
 286
 287 /**
 288  * \brief Parses a client command and calls the required helper function
 289  * \param Client        Pointer to client state structure
 290  * \param CommandString Command from client (single line of the command)
 291  * \return Heap String to return to the client
 292  */
 293 void Server_ParseClientCommand(tClient *Client, char *CommandString)
 294 {
 295         char    *space, *args;
 296          int    i;
 297         #if 0
 298         char    **argList;
 299          int    numArgs = 0;
 300         #endif
 301
 302         // Split at first space
 303         space = strchr(CommandString, ' ');
 304         if(space == NULL) {
 305                 args = NULL;
 306         }
 307         else {
 308                 *space = '\0';
 309                 args = space + 1;
 310                 while( *space == ' ' )  space ++;
 311
 312                 #if 0
 313                 // Count arguments
 314                 numArgs = 1;
 315                 for( i = 0; args[i]; )
 316                 {
 317                         while( CommandString[i] != ' ' ) {
 318                                 if( CommandString[i] == '"' ) {
 319                                         while( !(CommandString[i] != '\\' CommandString[i+1] == '"' ) )
 320                                                 i ++;
 321                                         i ++;
 322                                 }
 323                                 i ++;
 324                         }
 325                         numArgs ++;
 326                         while( CommandString[i] == ' ' )        i ++;
 327                 }
 328                 #endif
 329         }
 330
 331
 332         // Find command
 333         for( i = 0; i < NUM_COMMANDS; i++ )
 334         {
 335                 if(strcmp(CommandString, gaServer_Commands[i].Name) == 0) {
 336                         gaServer_Commands[i].Function(Client, args);
 337                         return ;
 338                 }
 339         }
 340
 341         sendf(Client->Socket, "400 Unknown Command\n");
 342 }
 343
 344 // ---
 345 // Commands
 346 // ---
 347 /**
 348  * \brief Set client username
 349  *
 350  * Usage: USER <username>
 351  */
 352 void Server_Cmd_USER(tClient *Client, char *Args)
 353 {
 354         char    *space = strchr(Args, ' ');
 355         if(space)       *space = '\0';  // Remove characters after the ' '
 356
 357         // Debug!
 358         if( giDebugLevel )
 359                 Debug(Client, "Authenticating as '%s'", Args);
 360
 361         // Save username
 362         if(Client->Username)
 363                 free(Client->Username);
 364         Client->Username = strdup(Args);
 365
 366         #if USE_SALT
 367         // Create a salt (that changes if the username is changed)
 368         // Yes, I know, I'm a little paranoid, but who isn't?
 369         Client->Salt[0] = 0x21 + (rand()&0x3F);
 370         Client->Salt[1] = 0x21 + (rand()&0x3F);
 371         Client->Salt[2] = 0x21 + (rand()&0x3F);
 372         Client->Salt[3] = 0x21 + (rand()&0x3F);
 373         Client->Salt[4] = 0x21 + (rand()&0x3F);
 374         Client->Salt[5] = 0x21 + (rand()&0x3F);
 375         Client->Salt[6] = 0x21 + (rand()&0x3F);
 376         Client->Salt[7] = 0x21 + (rand()&0x3F);
 377
 378         // TODO: Also send hash type to use, (SHA1 or crypt according to [DAA])
 379         sendf(Client->Socket, "100 SALT %s\n", Client->Salt);
 380         #else
 381         sendf(Client->Socket, "100 User Set\n");
 382         #endif
 383 }
 384
 385 /**
 386  * \brief Authenticate as a user
 387  *
 388  * Usage: PASS <hash>
 389  */
 390 void Server_Cmd_PASS(tClient *Client, char *Args)
 391 {
 392         char    *space = strchr(Args, ' ');
 393         if(space)       *space = '\0';  // Remove characters after the ' '
 394
 395         // Pass on to cokebank
 396         Client->UID = Bank_GetUserAuth(Client->Salt, Client->Username, Args);
 397
 398         if( Client->UID != -1 ) {
 399                 Client->bIsAuthed = 1;
 400                 sendf(Client->Socket, "200 Auth OK\n");
 401                 return ;
 402         }
 403
 404         sendf(Client->Socket, "401 Auth Failure\n");
 405 }
 406
 407 /**
 408  * \brief Authenticate as a user without a password
 409  *
 410  * Usage: AUTOAUTH <user>
 411  */
 412 void Server_Cmd_AUTOAUTH(tClient *Client, char *Args)
 413 {
 414         char    *space = strchr(Args, ' ');
 415         if(space)       *space = '\0';  // Remove characters after the ' '
 416
 417         // Check if trusted
 418         if( !Client->bIsTrusted ) {
 419                 if(giDebugLevel)
 420                         Debug(Client, "Untrusted client attempting to AUTOAUTH");
 421                 sendf(Client->Socket, "401 Untrusted\n");
 422                 return ;
 423         }
 424
 425         // Get UID
 426         Client->UID = Bank_GetAcctByName( Args );
 427         if( Client->UID < 0 ) {
 428                 if(giDebugLevel)
 429                         Debug(Client, "Unknown user '%s'", Args);
 430                 sendf(Client->Socket, "401 Auth Failure\n");
 431                 return ;
 432         }
 433
 434         // You can't be an internal account
 435         if( Bank_GetFlags(Client->UID) & USER_FLAG_INTERNAL ) {
 436                 Client->UID = -1;
 437                 sendf(Client->Socket, "401 Auth Failure\n");
 438                 return ;
 439         }
 440
 441         Client->bIsAuthed = 1;
 442
 443         if(giDebugLevel)
 444                 Debug(Client, "Auto authenticated as '%s' (%i)", Args, Client->UID);
 445
 446         sendf(Client->Socket, "200 Auth OK\n");
 447 }
 448
 449 /**
 450  * \brief Set effective user
 451  */
 452 void Server_Cmd_SETEUSER(tClient *Client, char *Args)
 453 {
 454         char    *space;
 455
 456         space = strchr(Args, ' ');
 457
 458         if(space)       *space = '\0';
 459
 460         if( !strlen(Args) ) {
 461                 sendf(Client->Socket, "407 SETEUSER expects an argument\n");
 462                 return ;
 463         }
 464
 465         // Check user permissions
 466         if( !(Bank_GetFlags(Client->UID) & (USER_FLAG_COKE|USER_FLAG_ADMIN)) ) {
 467                 sendf(Client->Socket, "403 Not in coke\n");
 468                 return ;
 469         }
 470
 471         // Set id
 472         Client->EffectiveUID = Bank_GetAcctByName(Args);
 473         if( Client->EffectiveUID == -1 ) {
 474                 sendf(Client->Socket, "404 User not found\n");
 475                 return ;
 476         }
 477
 478         // You can't be an internal account
 479         if( Bank_GetFlags(Client->EffectiveUID) & USER_FLAG_INTERNAL ) {
 480                 Client->EffectiveUID = -1;
 481                 sendf(Client->Socket, "404 User not found\n");
 482                 return ;
 483         }
 484
 485         sendf(Client->Socket, "200 User set\n");
 486 }
 487
 488 /**
 489  * \brief Enumerate the items that the server knows about
 490  */
 491 void Server_Cmd_ENUMITEMS(tClient *Client, char *Args)
 492 {
 493          int    i;
 494
 495         if( Args != NULL && strlen(Args) ) {
 496                 sendf(Client->Socket, "407 ENUM_ITEMS takes no arguments\n");
 497                 return ;
 498         }
 499
 500         sendf(Client->Socket, "201 Items %i\n", giNumItems);
 501
 502         for( i = 0; i < giNumItems; i ++ ) {
 503                 sendf(Client->Socket,
 504                         "202 Item %s:%i %i %s\n",
 505                          gaItems[i].Handler->Name, gaItems[i].ID, gaItems[i].Price, gaItems[i].Name
 506                          );
 507         }
 508
 509         sendf(Client->Socket, "200 List end\n");
 510 }
 511
 512 tItem *_GetItemFromString(char *String)
 513 {
 514         tHandler        *handler;
 515         char    *type = String;
 516         char    *colon = strchr(String, ':');
 517          int    num, i;
 518
 519         if( !colon ) {
 520                 return NULL;
 521         }
 522
 523         num = atoi(colon+1);
 524         *colon = '\0';
 525
 526         // Find handler
 527         handler = NULL;
 528         for( i = 0; i < giNumHandlers; i ++ )
 529         {
 530                 if( strcmp(gaHandlers[i]->Name, type) == 0) {
 531                         handler = gaHandlers[i];
 532                         break;
 533                 }
 534         }
 535         if( !handler ) {
 536                 return NULL;
 537         }
 538
 539         // Find item
 540         for( i = 0; i < giNumItems; i ++ )
 541         {
 542                 if( gaItems[i].Handler != handler )     continue;
 543                 if( gaItems[i].ID != num )      continue;
 544                 return &gaItems[i];
 545         }
 546         return NULL;
 547 }
 548
 549 /**
 550  * \brief Fetch information on a specific item
 551  */
 552 void Server_Cmd_ITEMINFO(tClient *Client, char *Args)
 553 {
 554         tItem   *item = _GetItemFromString(Args);
 555
 556         if( !item ) {
 557                 sendf(Client->Socket, "406 Bad Item ID\n");
 558                 return ;
 559         }
 560
 561         sendf(Client->Socket,
 562                 "202 Item %s:%i %i %s\n",
 563                  item->Handler->Name, item->ID, item->Price, item->Name
 564                  );
 565 }
 566
 567 void Server_Cmd_DISPENSE(tClient *Client, char *Args)
 568 {
 569         tItem   *item;
 570          int    ret;
 571          int    uid;
 572
 573         if( !Client->bIsAuthed ) {
 574                 sendf(Client->Socket, "401 Not Authenticated\n");
 575                 return ;
 576         }
 577
 578         item = _GetItemFromString(Args);
 579         if( !item ) {
 580                 sendf(Client->Socket, "406 Bad Item ID\n");
 581                 return ;
 582         }
 583
 584         if( Client->EffectiveUID != -1 ) {
 585                 uid = Client->EffectiveUID;
 586         }
 587         else {
 588                 uid = Client->UID;
 589         }
 590
 591         switch( ret = DispenseItem( Client->UID, uid, item ) )
 592         {
 593         case 0: sendf(Client->Socket, "200 Dispense OK\n");     return ;
 594         case 1: sendf(Client->Socket, "501 Unable to dispense\n");      return ;
 595         case 2: sendf(Client->Socket, "402 Poor You\n");        return ;
 596         default:
 597                 sendf(Client->Socket, "500 Dispense Error\n");
 598                 return ;
 599         }
 600 }
 601
 602 void Server_Cmd_GIVE(tClient *Client, char *Args)
 603 {
 604         char    *recipient, *ammount, *reason;
 605          int    uid, iAmmount;
 606          int    thisUid;
 607
 608         if( !Client->bIsAuthed ) {
 609                 sendf(Client->Socket, "401 Not Authenticated\n");
 610                 return ;
 611         }
 612
 613         recipient = Args;
 614
 615         ammount = strchr(Args, ' ');
 616         if( !ammount ) {
 617                 sendf(Client->Socket, "407 Invalid Argument, expected 3 parameters, 1 encountered\n");
 618                 return ;
 619         }
 620         *ammount = '\0';
 621         ammount ++;
 622
 623         reason = strchr(ammount, ' ');
 624         if( !reason ) {
 625                 sendf(Client->Socket, "407 Invalid Argument, expected 3 parameters, 2 encountered\n");
 626                 return ;
 627         }
 628         *reason = '\0';
 629         reason ++;
 630
 631         // Get recipient
 632         uid = Bank_GetAcctByName(recipient);
 633         if( uid == -1 ) {
 634                 sendf(Client->Socket, "404 Invalid target user\n");
 635                 return ;
 636         }
 637
 638         // You can't alter an internal account
 639         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 640                 sendf(Client->Socket, "404 Invalid target user\n");
 641                 return ;
 642         }
 643
 644         // Parse ammount
 645         iAmmount = atoi(ammount);
 646         if( iAmmount <= 0 ) {
 647                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 648                 return ;
 649         }
 650
 651         if( Client->EffectiveUID != -1 ) {
 652                 thisUid = Client->EffectiveUID;
 653         }
 654         else {
 655                 thisUid = Client->UID;
 656         }
 657
 658         // Do give
 659         switch( DispenseGive(Client->UID, thisUid, uid, iAmmount, reason) )
 660         {
 661         case 0:
 662                 sendf(Client->Socket, "200 Give OK\n");
 663                 return ;
 664         case 2:
 665                 sendf(Client->Socket, "402 Poor You\n");
 666                 return ;
 667         default:
 668                 sendf(Client->Socket, "500 Unknown error\n");
 669                 return ;
 670         }
 671 }
 672
 673 void Server_Cmd_DONATE(tClient *Client, char *Args)
 674 {
 675         char    *ammount, *reason;
 676          int    iAmmount;
 677          int    thisUid;
 678
 679         if( !Client->bIsAuthed ) {
 680                 sendf(Client->Socket, "401 Not Authenticated\n");
 681                 return ;
 682         }
 683
 684         ammount = Args;
 685
 686         // Get the start of the reason
 687         reason = strchr(Args, ' ');
 688         if( !ammount ) {
 689                 sendf(Client->Socket, "407 Invalid Argument, expected 2 parameters, 1 encountered\n");
 690                 return ;
 691         }
 692         *reason = '\0';
 693         reason ++;
 694
 695         // Check the end of the reason
 696         if( strchr(reason, ' ') ) {
 697                 sendf(Client->Socket, "407 Invalid Argument, expected 2 parameters, more encountered\n");
 698                 return ;
 699         }
 700
 701         // Parse ammount
 702         iAmmount = atoi(ammount);
 703         if( iAmmount <= 0 ) {
 704                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 705                 return ;
 706         }
 707
 708         // Handle effective users
 709         if( Client->EffectiveUID != -1 ) {
 710                 thisUid = Client->EffectiveUID;
 711         }
 712         else {
 713                 thisUid = Client->UID;
 714         }
 715
 716         // Do give
 717         switch( DispenseDonate(Client->UID, thisUid, iAmmount, reason) )
 718         {
 719         case 0:
 720                 sendf(Client->Socket, "200 Give OK\n");
 721                 return ;
 722         case 2:
 723                 sendf(Client->Socket, "402 Poor You\n");
 724                 return ;
 725         default:
 726                 sendf(Client->Socket, "500 Unknown error\n");
 727                 return ;
 728         }
 729 }
 730
 731 void Server_Cmd_ADD(tClient *Client, char *Args)
 732 {
 733         char    *user, *ammount, *reason;
 734          int    uid, iAmmount;
 735
 736         if( !Client->bIsAuthed ) {
 737                 sendf(Client->Socket, "401 Not Authenticated\n");
 738                 return ;
 739         }
 740
 741         user = Args;
 742
 743         ammount = strchr(Args, ' ');
 744         if( !ammount ) {
 745                 sendf(Client->Socket, "407 Invalid Argument, expected 3 parameters, 1 encountered\n");
 746                 return ;
 747         }
 748         *ammount = '\0';
 749         ammount ++;
 750
 751         reason = strchr(ammount, ' ');
 752         if( !reason ) {
 753                 sendf(Client->Socket, "407 Invalid Argument, expected 3 parameters, 2 encountered\n");
 754                 return ;
 755         }
 756         *reason = '\0';
 757         reason ++;
 758
 759         // Check user permissions
 760         if( !(Bank_GetFlags(Client->UID) & (USER_FLAG_COKE|USER_FLAG_ADMIN))  ) {
 761                 sendf(Client->Socket, "403 Not in coke\n");
 762                 return ;
 763         }
 764
 765         // Get recipient
 766         uid = Bank_GetAcctByName(user);
 767         if( uid == -1 ) {
 768                 sendf(Client->Socket, "404 Invalid user\n");
 769                 return ;
 770         }
 771
 772         // You can't alter an internal account
 773         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 774                 sendf(Client->Socket, "404 Invalid user\n");
 775                 return ;
 776         }
 777
 778         // Parse ammount
 779         iAmmount = atoi(ammount);
 780         if( iAmmount == 0 && ammount[0] != '0' ) {
 781                 sendf(Client->Socket, "407 Invalid Argument\n");
 782                 return ;
 783         }
 784
 785         // Do give
 786         switch( DispenseAdd(Client->UID, uid, iAmmount, reason) )
 787         {
 788         case 0:
 789                 sendf(Client->Socket, "200 Add OK\n");
 790                 return ;
 791         case 2:
 792                 sendf(Client->Socket, "402 Poor Guy\n");
 793                 return ;
 794         default:
 795                 sendf(Client->Socket, "500 Unknown error\n");
 796                 return ;
 797         }
 798 }
 799
 800 void Server_Cmd_SET(tClient *Client, char *Args)
 801 {
 802         char    *user, *ammount, *reason;
 803          int    uid, iAmmount;
 804
 805         if( !Client->bIsAuthed ) {
 806                 sendf(Client->Socket, "401 Not Authenticated\n");
 807                 return ;
 808         }
 809
 810         user = Args;
 811
 812         ammount = strchr(Args, ' ');
 813         if( !ammount ) {
 814                 sendf(Client->Socket, "407 Invalid Argument, expected 3 parameters, 1 encountered\n");
 815                 return ;
 816         }
 817         *ammount = '\0';
 818         ammount ++;
 819
 820         reason = strchr(ammount, ' ');
 821         if( !reason ) {
 822                 sendf(Client->Socket, "407 Invalid Argument, expected 3 parameters, 2 encountered\n");
 823                 return ;
 824         }
 825         *reason = '\0';
 826         reason ++;
 827
 828         // Check user permissions
 829         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN)  ) {
 830                 sendf(Client->Socket, "403 Not an admin\n");
 831                 return ;
 832         }
 833
 834         // Get recipient
 835         uid = Bank_GetAcctByName(user);
 836         if( uid == -1 ) {
 837                 sendf(Client->Socket, "404 Invalid user\n");
 838                 return ;
 839         }
 840
 841         // You can't alter an internal account
 842         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 843                 sendf(Client->Socket, "404 Invalid user\n");
 844                 return ;
 845         }
 846
 847         // Parse ammount
 848         iAmmount = atoi(ammount);
 849         if( iAmmount == 0 && ammount[0] != '0' ) {
 850                 sendf(Client->Socket, "407 Invalid Argument\n");
 851                 return ;
 852         }
 853
 854         // Do give
 855         switch( DispenseSet(Client->UID, uid, iAmmount, reason) )
 856         {
 857         case 0:
 858                 sendf(Client->Socket, "200 Add OK\n");
 859                 return ;
 860         case 2:
 861                 sendf(Client->Socket, "402 Poor Guy\n");
 862                 return ;
 863         default:
 864                 sendf(Client->Socket, "500 Unknown error\n");
 865                 return ;
 866         }
 867 }
 868
 869 void Server_Cmd_ENUMUSERS(tClient *Client, char *Args)
 870 {
 871          int    i, numRet = 0;
 872         tAcctIterator   *it;
 873          int    maxBal = INT_MAX, minBal = INT_MIN;
 874          int    flagMask = 0, flagVal = 0;
 875          int    sort = BANK_ITFLAG_SORT_NAME;
 876         time_t  lastSeenAfter=0, lastSeenBefore=0;
 877
 878          int    flags;  // Iterator flags
 879          int    balValue;       // Balance value for iterator
 880         time_t  timeValue;      // Time value for iterator
 881
 882         // Parse arguments
 883         if( Args && strlen(Args) )
 884         {
 885                 char    *space = Args, *type, *val;
 886                 do
 887                 {
 888                         type = space;
 889                         // Get next space
 890                         space = strchr(space, ' ');
 891                         if(space)       *space = '\0';
 892
 893                         // Get type
 894                         val = strchr(type, ':');
 895                         if( val ) {
 896                                 *val = '\0';
 897                                 val ++;
 898
 899                                 // Types
 900                                 // - Minium Balance
 901                                 if( strcmp(type, "min_balance") == 0 ) {
 902                                         minBal = atoi(val);
 903                                 }
 904                                 // - Maximum Balance
 905                                 else if( strcmp(type, "max_balance") == 0 ) {
 906                                         maxBal = atoi(val);
 907                                 }
 908                                 // - Flags
 909                                 else if( strcmp(type, "flags") == 0 ) {
 910                                         if( Server_int_ParseFlags(Client, val, &flagMask, &flagVal) )
 911                                                 return ;
 912                                 }
 913                                 // - Last seen before timestamp
 914                                 else if( strcmp(type, "last_seen_before") == 0 ) {
 915                                         lastSeenAfter = atoll(val);
 916                                 }
 917                                 // - Last seen after timestamp
 918                                 else if( strcmp(type, "last_seen_after") == 0 ) {
 919                                         lastSeenAfter = atoll(val);
 920                                 }
 921                                 // - Sorting
 922                                 else if( strcmp(type, "sort") == 0 ) {
 923                                         char    *dash = strchr(val, '-');
 924                                         if( dash ) {
 925                                                 *dash = '\0';
 926                                                 dash ++;
 927                                         }
 928                                         if( strcmp(val, "name") == 0 ) {
 929                                                 sort = BANK_ITFLAG_SORT_NAME;
 930                                         }
 931                                         else if( strcmp(val, "balance") == 0 ) {
 932                                                 sort = BANK_ITFLAG_SORT_BAL;
 933                                         }
 934                                         else if( strcmp(val, "lastseen") == 0 ) {
 935                                                 sort = BANK_ITFLAG_SORT_LASTSEEN;
 936                                         }
 937                                         else {
 938                                                 sendf(Client->Socket, "407 Unknown sort field ('%s')\n", val);
 939                                                 return ;
 940                                         }
 941                                         // Handle sort direction
 942                                         if( dash ) {
 943                                                 if( strcmp(dash, "desc") == 0 ) {
 944                                                         sort |= BANK_ITFLAG_REVSORT;
 945                                                 }
 946                                                 else {
 947                                                         sendf(Client->Socket, "407 Unknown sort direction '%s'\n", dash);
 948                                                         return ;
 949                                                 }
 950                                                 dash[-1] = '-';
 951                                         }
 952                                 }
 953                                 else {
 954                                         sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s:%s'\n", type, val);
 955                                         return ;
 956                                 }
 957
 958                                 val[-1] = ':';
 959                         }
 960                         else {
 961                                 sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s'\n", type);
 962                                 return ;
 963                         }
 964
 965                         // Eat whitespace
 966                         if( space ) {
 967                                 *space = ' ';   // Repair (to be nice)
 968                                 space ++;
 969                                 while(*space == ' ')    space ++;
 970                         }
 971                 }       while(space);
 972         }
 973
 974         // Create iterator
 975         if( maxBal != INT_MAX ) {
 976                 flags = sort|BANK_ITFLAG_MAXBALANCE;
 977                 balValue = maxBal;
 978         }
 979         else if( minBal != INT_MIN ) {
 980                 flags = sort|BANK_ITFLAG_MINBALANCE;
 981                 balValue = minBal;
 982         }
 983         else {
 984                 flags = sort;
 985                 balValue = 0;
 986         }
 987         if( lastSeenBefore ) {
 988                 timeValue = lastSeenBefore;
 989                 flags |= BANK_ITFLAG_SEENBEFORE;
 990         }
 991         else if( lastSeenAfter ) {
 992                 timeValue = lastSeenAfter;
 993                 flags |= BANK_ITFLAG_SEENAFTER;
 994         }
 995         else {
 996                 timeValue = 0;
 997         }
 998         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
 999
1000         // Get return number
1001         while( (i = Bank_IteratorNext(it)) != -1 )
1002         {
1003                 int bal = Bank_GetBalance(i);
1004
1005                 if( bal == INT_MIN )    continue;
1006
1007                 if( bal < minBal )      continue;
1008                 if( bal > maxBal )      continue;
1009
1010                 numRet ++;
1011         }
1012
1013         Bank_DelIterator(it);
1014
1015         // Send count
1016         sendf(Client->Socket, "201 Users %i\n", numRet);
1017
1018
1019         // Create iterator
1020         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
1021
1022         while( (i = Bank_IteratorNext(it)) != -1 )
1023         {
1024                 int bal = Bank_GetBalance(i);
1025
1026                 if( bal == INT_MIN )    continue;
1027
1028                 if( bal < minBal )      continue;
1029                 if( bal > maxBal )      continue;
1030
1031                 _SendUserInfo(Client, i);
1032         }
1033
1034         Bank_DelIterator(it);
1035
1036         sendf(Client->Socket, "200 List End\n");
1037 }
1038
1039 void Server_Cmd_USERINFO(tClient *Client, char *Args)
1040 {
1041          int    uid;
1042         char    *user = Args;
1043         char    *space;
1044
1045         space = strchr(user, ' ');
1046         if(space)       *space = '\0';
1047
1048         if( giDebugLevel )      Debug(Client, "User Info '%s'", user);
1049
1050         // Get recipient
1051         uid = Bank_GetAcctByName(user);
1052
1053         if( giDebugLevel >= 2 ) Debug(Client, "uid = %i", uid);
1054         if( uid == -1 ) {
1055                 sendf(Client->Socket, "404 Invalid user\n");
1056                 return ;
1057         }
1058
1059         _SendUserInfo(Client, uid);
1060 }
1061
1062 void _SendUserInfo(tClient *Client, int UserID)
1063 {
1064         char    *type, *disabled="", *door="";
1065          int    flags = Bank_GetFlags(UserID);
1066
1067         if( flags & USER_FLAG_INTERNAL ) {
1068                 type = "internal";
1069         }
1070         else if( flags & USER_FLAG_COKE ) {
1071                 if( flags & USER_FLAG_ADMIN )
1072                         type = "coke,admin";
1073                 else
1074                         type = "coke";
1075         }
1076         else if( flags & USER_FLAG_ADMIN ) {
1077                 type = "admin";
1078         }
1079         else {
1080                 type = "user";
1081         }
1082
1083         if( flags & USER_FLAG_DISABLED )
1084                 disabled = ",disabled";
1085         if( flags & USER_FLAG_DOORGROUP )
1086                 door = ",door";
1087
1088         // TODO: User flags/type
1089         sendf(
1090                 Client->Socket, "202 User %s %i %s%s\n",
1091                 Bank_GetAcctName(UserID), Bank_GetBalance(UserID),
1092                 type, disabled
1093                 );
1094 }
1095
1096 void Server_Cmd_USERADD(tClient *Client, char *Args)
1097 {
1098         char    *username, *space;
1099
1100         // Check permissions
1101         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1102                 sendf(Client->Socket, "403 Not a coke admin\n");
1103                 return ;
1104         }
1105
1106         // Read arguments
1107         username = Args;
1108         while( *username == ' ' )       username ++;
1109         space = strchr(username, ' ');
1110         if(space)       *space = '\0';
1111
1112         // Try to create user
1113         if( Bank_CreateAcct(username) == -1 ) {
1114                 sendf(Client->Socket, "404 User exists\n");
1115                 return ;
1116         }
1117
1118         {
1119                 char    *thisName = Bank_GetAcctName(Client->UID);
1120                 Log_Info("Account '%s' created by '%s'", username, thisName);
1121                 free(thisName);
1122         }
1123
1124         sendf(Client->Socket, "200 User Added\n");
1125 }
1126
1127 void Server_Cmd_USERFLAGS(tClient *Client, char *Args)
1128 {
1129         char    *username, *flags;
1130         char    *space;
1131          int    mask=0, value=0;
1132          int    uid;
1133
1134         // Check permissions
1135         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1136                 sendf(Client->Socket, "403 Not a coke admin\n");
1137                 return ;
1138         }
1139
1140         // Read arguments
1141         // - Username
1142         username = Args;
1143         while( *username == ' ' )       username ++;
1144         space = strchr(username, ' ');
1145         if(!space) {
1146                 sendf(Client->Socket, "407 USER_FLAGS requires 2 arguments, 1 given\n");
1147                 return ;
1148         }
1149         *space = '\0';
1150         // - Flags
1151         flags = space + 1;
1152         while( *flags == ' ' )  flags ++;
1153         space = strchr(flags, ' ');
1154         if(space)       *space = '\0';
1155
1156         // Get UID
1157         uid = Bank_GetAcctByName(username);
1158         if( uid == -1 ) {
1159                 sendf(Client->Socket, "404 User '%s' not found\n", username);
1160                 return ;
1161         }
1162
1163         // Parse flags
1164         if( Server_int_ParseFlags(Client, flags, &mask, &value) )
1165                 return ;
1166
1167         // Apply flags
1168         Bank_SetFlags(uid, mask, value);
1169
1170         // Return OK
1171         sendf(Client->Socket, "200 User Updated\n");
1172 }
1173
1174 // --- INTERNAL HELPERS ---
1175 void Debug(tClient *Client, const char *Format, ...)
1176 {
1177         va_list args;
1178         //printf("%010i [%i] ", (int)time(NULL), Client->ID);
1179         printf("[%i] ", Client->ID);
1180         va_start(args, Format);
1181         vprintf(Format, args);
1182         va_end(args);
1183         printf("\n");
1184 }
1185
1186 int sendf(int Socket, const char *Format, ...)
1187 {
1188         va_list args;
1189          int    len;
1190
1191         va_start(args, Format);
1192         len = vsnprintf(NULL, 0, Format, args);
1193         va_end(args);
1194
1195         {
1196                 char    buf[len+1];
1197                 va_start(args, Format);
1198                 vsnprintf(buf, len+1, Format, args);
1199                 va_end(args);
1200
1201                 #if DEBUG_TRACE_CLIENT
1202                 printf("sendf: %s", buf);
1203                 #endif
1204
1205                 return send(Socket, buf, len, 0);
1206         }
1207 }
1208
1209 int Server_int_ParseFlags(tClient *Client, const char *Str, int *Mask, int *Value)
1210 {
1211         struct {
1212                 const char      *Name;
1213                  int    Mask;
1214                  int    Value;
1215         }       cFLAGS[] = {
1216                  {"disabled", USER_FLAG_DISABLED, USER_FLAG_DISABLED}
1217                 ,{"door", USER_FLAG_DOORGROUP, USER_FLAG_DOORGROUP}
1218                 ,{"coke", USER_FLAG_COKE, USER_FLAG_COKE}
1219                 ,{"admin", USER_FLAG_ADMIN, USER_FLAG_ADMIN}
1220                 ,{"internal", USER_FLAG_INTERNAL, USER_FLAG_INTERNAL}
1221         };
1222         const int       ciNumFlags = sizeof(cFLAGS)/sizeof(cFLAGS[0]);
1223
1224         char    *space;
1225
1226         *Mask = 0;
1227         *Value = 0;
1228
1229         do {
1230                  int    bRemove = 0;
1231                  int    i;
1232                  int    len;
1233
1234                 while( *Str == ' ' )    Str ++; // Eat whitespace
1235                 space = strchr(Str, ',');       // Find the end of the flag
1236                 if(space)
1237                         len = space - Str;
1238                 else
1239                         len = strlen(Str);
1240
1241                 // Check for inversion/removal
1242                 if( *Str == '!' || *Str == '-' ) {
1243                         bRemove = 1;
1244                         Str ++;
1245                 }
1246                 else if( *Str == '+' ) {
1247                         Str ++;
1248                 }
1249
1250                 // Check flag values
1251                 for( i = 0; i < ciNumFlags; i ++ )
1252                 {
1253                         if( strncmp(Str, cFLAGS[i].Name, len) == 0 ) {
1254                                 *Mask |= cFLAGS[i].Mask;
1255                                 *Value &= ~cFLAGS[i].Mask;
1256                                 if( !bRemove )
1257                                         *Value |= cFLAGS[i].Value;
1258                                 break;
1259                         }
1260                 }
1261
1262                 // Error check
1263                 if( i == ciNumFlags ) {
1264                         char    val[len+1];
1265                         strncpy(val, Str, len+1);
1266                         sendf(Client->Socket, "407 Unknown flag value '%s'\n", val);
1267                         return -1;
1268                 }
1269
1270                 Str = space + 1;
1271         } while(space);
1272
1273         return 0;
1274 }