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, count;
 494
 495         if( Args != NULL && strlen(Args) ) {
 496                 sendf(Client->Socket, "407 ENUM_ITEMS takes no arguments\n");
 497                 return ;
 498         }
 499
 500         // Count shown items
 501         count = 0;
 502         for( i = 0; i < giNumItems; i ++ ) {
 503                 if( gaItems[i].bHidden )        continue;
 504                 count ++;
 505         }
 506
 507         sendf(Client->Socket, "201 Items %i\n", count);
 508
 509         for( i = 0; i < giNumItems; i ++ ) {
 510                 if( gaItems[i].bHidden )        continue;
 511                 sendf(Client->Socket,
 512                         "202 Item %s:%i %i %s\n",
 513                          gaItems[i].Handler->Name, gaItems[i].ID, gaItems[i].Price, gaItems[i].Name
 514                          );
 515         }
 516
 517         sendf(Client->Socket, "200 List end\n");
 518 }
 519
 520 tItem *_GetItemFromString(char *String)
 521 {
 522         tHandler        *handler;
 523         char    *type = String;
 524         char    *colon = strchr(String, ':');
 525          int    num, i;
 526
 527         if( !colon ) {
 528                 return NULL;
 529         }
 530
 531         num = atoi(colon+1);
 532         *colon = '\0';
 533
 534         // Find handler
 535         handler = NULL;
 536         for( i = 0; i < giNumHandlers; i ++ )
 537         {
 538                 if( strcmp(gaHandlers[i]->Name, type) == 0) {
 539                         handler = gaHandlers[i];
 540                         break;
 541                 }
 542         }
 543         if( !handler ) {
 544                 return NULL;
 545         }
 546
 547         // Find item
 548         for( i = 0; i < giNumItems; i ++ )
 549         {
 550                 if( gaItems[i].Handler != handler )     continue;
 551                 if( gaItems[i].ID != num )      continue;
 552                 return &gaItems[i];
 553         }
 554         return NULL;
 555 }
 556
 557 /**
 558  * \brief Fetch information on a specific item
 559  */
 560 void Server_Cmd_ITEMINFO(tClient *Client, char *Args)
 561 {
 562         tItem   *item = _GetItemFromString(Args);
 563
 564         if( !item ) {
 565                 sendf(Client->Socket, "406 Bad Item ID\n");
 566                 return ;
 567         }
 568
 569         sendf(Client->Socket,
 570                 "202 Item %s:%i %i %s\n",
 571                  item->Handler->Name, item->ID, item->Price, item->Name
 572                  );
 573 }
 574
 575 void Server_Cmd_DISPENSE(tClient *Client, char *Args)
 576 {
 577         tItem   *item;
 578          int    ret;
 579          int    uid;
 580
 581         if( !Client->bIsAuthed ) {
 582                 sendf(Client->Socket, "401 Not Authenticated\n");
 583                 return ;
 584         }
 585
 586         item = _GetItemFromString(Args);
 587         if( !item ) {
 588                 sendf(Client->Socket, "406 Bad Item ID\n");
 589                 return ;
 590         }
 591
 592         if( Client->EffectiveUID != -1 ) {
 593                 uid = Client->EffectiveUID;
 594         }
 595         else {
 596                 uid = Client->UID;
 597         }
 598
 599         switch( ret = DispenseItem( Client->UID, uid, item ) )
 600         {
 601         case 0: sendf(Client->Socket, "200 Dispense OK\n");     return ;
 602         case 1: sendf(Client->Socket, "501 Unable to dispense\n");      return ;
 603         case 2: sendf(Client->Socket, "402 Poor You\n");        return ;
 604         default:
 605                 sendf(Client->Socket, "500 Dispense Error\n");
 606                 return ;
 607         }
 608 }
 609
 610 void Server_Cmd_GIVE(tClient *Client, char *Args)
 611 {
 612         char    *recipient, *ammount, *reason;
 613          int    uid, iAmmount;
 614          int    thisUid;
 615
 616         if( !Client->bIsAuthed ) {
 617                 sendf(Client->Socket, "401 Not Authenticated\n");
 618                 return ;
 619         }
 620
 621         recipient = Args;
 622
 623         ammount = strchr(Args, ' ');
 624         if( !ammount ) {
 625                 sendf(Client->Socket, "407 Invalid Argument, expected 3 parameters, 1 encountered\n");
 626                 return ;
 627         }
 628         *ammount = '\0';
 629         ammount ++;
 630
 631         reason = strchr(ammount, ' ');
 632         if( !reason ) {
 633                 sendf(Client->Socket, "407 Invalid Argument, expected 3 parameters, 2 encountered\n");
 634                 return ;
 635         }
 636         *reason = '\0';
 637         reason ++;
 638
 639         // Get recipient
 640         uid = Bank_GetAcctByName(recipient);
 641         if( uid == -1 ) {
 642                 sendf(Client->Socket, "404 Invalid target user\n");
 643                 return ;
 644         }
 645
 646         // You can't alter an internal account
 647         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 648                 sendf(Client->Socket, "404 Invalid target user\n");
 649                 return ;
 650         }
 651
 652         // Parse ammount
 653         iAmmount = atoi(ammount);
 654         if( iAmmount <= 0 ) {
 655                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 656                 return ;
 657         }
 658
 659         if( Client->EffectiveUID != -1 ) {
 660                 thisUid = Client->EffectiveUID;
 661         }
 662         else {
 663                 thisUid = Client->UID;
 664         }
 665
 666         // Do give
 667         switch( DispenseGive(Client->UID, thisUid, uid, iAmmount, reason) )
 668         {
 669         case 0:
 670                 sendf(Client->Socket, "200 Give OK\n");
 671                 return ;
 672         case 2:
 673                 sendf(Client->Socket, "402 Poor You\n");
 674                 return ;
 675         default:
 676                 sendf(Client->Socket, "500 Unknown error\n");
 677                 return ;
 678         }
 679 }
 680
 681 void Server_Cmd_DONATE(tClient *Client, char *Args)
 682 {
 683         char    *ammount, *reason;
 684          int    iAmmount;
 685          int    thisUid;
 686
 687         if( !Client->bIsAuthed ) {
 688                 sendf(Client->Socket, "401 Not Authenticated\n");
 689                 return ;
 690         }
 691
 692         ammount = Args;
 693
 694         // Get the start of the reason
 695         reason = strchr(Args, ' ');
 696         if( !ammount ) {
 697                 sendf(Client->Socket, "407 Invalid Argument, expected 2 parameters, 1 encountered\n");
 698                 return ;
 699         }
 700         *reason = '\0';
 701         reason ++;
 702
 703         // Check the end of the reason
 704         if( strchr(reason, ' ') ) {
 705                 sendf(Client->Socket, "407 Invalid Argument, expected 2 parameters, more encountered\n");
 706                 return ;
 707         }
 708
 709         // Parse ammount
 710         iAmmount = atoi(ammount);
 711         if( iAmmount <= 0 ) {
 712                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 713                 return ;
 714         }
 715
 716         // Handle effective users
 717         if( Client->EffectiveUID != -1 ) {
 718                 thisUid = Client->EffectiveUID;
 719         }
 720         else {
 721                 thisUid = Client->UID;
 722         }
 723
 724         // Do give
 725         switch( DispenseDonate(Client->UID, thisUid, iAmmount, reason) )
 726         {
 727         case 0:
 728                 sendf(Client->Socket, "200 Give OK\n");
 729                 return ;
 730         case 2:
 731                 sendf(Client->Socket, "402 Poor You\n");
 732                 return ;
 733         default:
 734                 sendf(Client->Socket, "500 Unknown error\n");
 735                 return ;
 736         }
 737 }
 738
 739 void Server_Cmd_ADD(tClient *Client, char *Args)
 740 {
 741         char    *user, *ammount, *reason;
 742          int    uid, iAmmount;
 743
 744         if( !Client->bIsAuthed ) {
 745                 sendf(Client->Socket, "401 Not Authenticated\n");
 746                 return ;
 747         }
 748
 749         user = Args;
 750
 751         ammount = strchr(Args, ' ');
 752         if( !ammount ) {
 753                 sendf(Client->Socket, "407 Invalid Argument, expected 3 parameters, 1 encountered\n");
 754                 return ;
 755         }
 756         *ammount = '\0';
 757         ammount ++;
 758
 759         reason = strchr(ammount, ' ');
 760         if( !reason ) {
 761                 sendf(Client->Socket, "407 Invalid Argument, expected 3 parameters, 2 encountered\n");
 762                 return ;
 763         }
 764         *reason = '\0';
 765         reason ++;
 766
 767         // Check user permissions
 768         if( !(Bank_GetFlags(Client->UID) & (USER_FLAG_COKE|USER_FLAG_ADMIN))  ) {
 769                 sendf(Client->Socket, "403 Not in coke\n");
 770                 return ;
 771         }
 772
 773         // Get recipient
 774         uid = Bank_GetAcctByName(user);
 775         if( uid == -1 ) {
 776                 sendf(Client->Socket, "404 Invalid user\n");
 777                 return ;
 778         }
 779
 780         // You can't alter an internal account
 781         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 782                 sendf(Client->Socket, "404 Invalid user\n");
 783                 return ;
 784         }
 785
 786         // Parse ammount
 787         iAmmount = atoi(ammount);
 788         if( iAmmount == 0 && ammount[0] != '0' ) {
 789                 sendf(Client->Socket, "407 Invalid Argument\n");
 790                 return ;
 791         }
 792
 793         // Do give
 794         switch( DispenseAdd(Client->UID, uid, iAmmount, reason) )
 795         {
 796         case 0:
 797                 sendf(Client->Socket, "200 Add OK\n");
 798                 return ;
 799         case 2:
 800                 sendf(Client->Socket, "402 Poor Guy\n");
 801                 return ;
 802         default:
 803                 sendf(Client->Socket, "500 Unknown error\n");
 804                 return ;
 805         }
 806 }
 807
 808 void Server_Cmd_SET(tClient *Client, char *Args)
 809 {
 810         char    *user, *ammount, *reason;
 811          int    uid, iAmmount;
 812
 813         if( !Client->bIsAuthed ) {
 814                 sendf(Client->Socket, "401 Not Authenticated\n");
 815                 return ;
 816         }
 817
 818         user = Args;
 819
 820         ammount = strchr(Args, ' ');
 821         if( !ammount ) {
 822                 sendf(Client->Socket, "407 Invalid Argument, expected 3 parameters, 1 encountered\n");
 823                 return ;
 824         }
 825         *ammount = '\0';
 826         ammount ++;
 827
 828         reason = strchr(ammount, ' ');
 829         if( !reason ) {
 830                 sendf(Client->Socket, "407 Invalid Argument, expected 3 parameters, 2 encountered\n");
 831                 return ;
 832         }
 833         *reason = '\0';
 834         reason ++;
 835
 836         // Check user permissions
 837         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN)  ) {
 838                 sendf(Client->Socket, "403 Not an admin\n");
 839                 return ;
 840         }
 841
 842         // Get recipient
 843         uid = Bank_GetAcctByName(user);
 844         if( uid == -1 ) {
 845                 sendf(Client->Socket, "404 Invalid user\n");
 846                 return ;
 847         }
 848
 849         // You can't alter an internal account
 850         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 851                 sendf(Client->Socket, "404 Invalid user\n");
 852                 return ;
 853         }
 854
 855         // Parse ammount
 856         iAmmount = atoi(ammount);
 857         if( iAmmount == 0 && ammount[0] != '0' ) {
 858                 sendf(Client->Socket, "407 Invalid Argument\n");
 859                 return ;
 860         }
 861
 862         // Do give
 863         switch( DispenseSet(Client->UID, uid, iAmmount, reason) )
 864         {
 865         case 0:
 866                 sendf(Client->Socket, "200 Add OK\n");
 867                 return ;
 868         case 2:
 869                 sendf(Client->Socket, "402 Poor Guy\n");
 870                 return ;
 871         default:
 872                 sendf(Client->Socket, "500 Unknown error\n");
 873                 return ;
 874         }
 875 }
 876
 877 void Server_Cmd_ENUMUSERS(tClient *Client, char *Args)
 878 {
 879          int    i, numRet = 0;
 880         tAcctIterator   *it;
 881          int    maxBal = INT_MAX, minBal = INT_MIN;
 882          int    flagMask = 0, flagVal = 0;
 883          int    sort = BANK_ITFLAG_SORT_NAME;
 884         time_t  lastSeenAfter=0, lastSeenBefore=0;
 885
 886          int    flags;  // Iterator flags
 887          int    balValue;       // Balance value for iterator
 888         time_t  timeValue;      // Time value for iterator
 889
 890         // Parse arguments
 891         if( Args && strlen(Args) )
 892         {
 893                 char    *space = Args, *type, *val;
 894                 do
 895                 {
 896                         type = space;
 897                         // Get next space
 898                         space = strchr(space, ' ');
 899                         if(space)       *space = '\0';
 900
 901                         // Get type
 902                         val = strchr(type, ':');
 903                         if( val ) {
 904                                 *val = '\0';
 905                                 val ++;
 906
 907                                 // Types
 908                                 // - Minium Balance
 909                                 if( strcmp(type, "min_balance") == 0 ) {
 910                                         minBal = atoi(val);
 911                                 }
 912                                 // - Maximum Balance
 913                                 else if( strcmp(type, "max_balance") == 0 ) {
 914                                         maxBal = atoi(val);
 915                                 }
 916                                 // - Flags
 917                                 else if( strcmp(type, "flags") == 0 ) {
 918                                         if( Server_int_ParseFlags(Client, val, &flagMask, &flagVal) )
 919                                                 return ;
 920                                 }
 921                                 // - Last seen before timestamp
 922                                 else if( strcmp(type, "last_seen_before") == 0 ) {
 923                                         lastSeenAfter = atoll(val);
 924                                 }
 925                                 // - Last seen after timestamp
 926                                 else if( strcmp(type, "last_seen_after") == 0 ) {
 927                                         lastSeenAfter = atoll(val);
 928                                 }
 929                                 // - Sorting
 930                                 else if( strcmp(type, "sort") == 0 ) {
 931                                         char    *dash = strchr(val, '-');
 932                                         if( dash ) {
 933                                                 *dash = '\0';
 934                                                 dash ++;
 935                                         }
 936                                         if( strcmp(val, "name") == 0 ) {
 937                                                 sort = BANK_ITFLAG_SORT_NAME;
 938                                         }
 939                                         else if( strcmp(val, "balance") == 0 ) {
 940                                                 sort = BANK_ITFLAG_SORT_BAL;
 941                                         }
 942                                         else if( strcmp(val, "lastseen") == 0 ) {
 943                                                 sort = BANK_ITFLAG_SORT_LASTSEEN;
 944                                         }
 945                                         else {
 946                                                 sendf(Client->Socket, "407 Unknown sort field ('%s')\n", val);
 947                                                 return ;
 948                                         }
 949                                         // Handle sort direction
 950                                         if( dash ) {
 951                                                 if( strcmp(dash, "desc") == 0 ) {
 952                                                         sort |= BANK_ITFLAG_REVSORT;
 953                                                 }
 954                                                 else {
 955                                                         sendf(Client->Socket, "407 Unknown sort direction '%s'\n", dash);
 956                                                         return ;
 957                                                 }
 958                                                 dash[-1] = '-';
 959                                         }
 960                                 }
 961                                 else {
 962                                         sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s:%s'\n", type, val);
 963                                         return ;
 964                                 }
 965
 966                                 val[-1] = ':';
 967                         }
 968                         else {
 969                                 sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s'\n", type);
 970                                 return ;
 971                         }
 972
 973                         // Eat whitespace
 974                         if( space ) {
 975                                 *space = ' ';   // Repair (to be nice)
 976                                 space ++;
 977                                 while(*space == ' ')    space ++;
 978                         }
 979                 }       while(space);
 980         }
 981
 982         // Create iterator
 983         if( maxBal != INT_MAX ) {
 984                 flags = sort|BANK_ITFLAG_MAXBALANCE;
 985                 balValue = maxBal;
 986         }
 987         else if( minBal != INT_MIN ) {
 988                 flags = sort|BANK_ITFLAG_MINBALANCE;
 989                 balValue = minBal;
 990         }
 991         else {
 992                 flags = sort;
 993                 balValue = 0;
 994         }
 995         if( lastSeenBefore ) {
 996                 timeValue = lastSeenBefore;
 997                 flags |= BANK_ITFLAG_SEENBEFORE;
 998         }
 999         else if( lastSeenAfter ) {
1000                 timeValue = lastSeenAfter;
1001                 flags |= BANK_ITFLAG_SEENAFTER;
1002         }
1003         else {
1004                 timeValue = 0;
1005         }
1006         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
1007
1008         // Get return number
1009         while( (i = Bank_IteratorNext(it)) != -1 )
1010         {
1011                 int bal = Bank_GetBalance(i);
1012
1013                 if( bal == INT_MIN )    continue;
1014
1015                 if( bal < minBal )      continue;
1016                 if( bal > maxBal )      continue;
1017
1018                 numRet ++;
1019         }
1020
1021         Bank_DelIterator(it);
1022
1023         // Send count
1024         sendf(Client->Socket, "201 Users %i\n", numRet);
1025
1026
1027         // Create iterator
1028         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
1029
1030         while( (i = Bank_IteratorNext(it)) != -1 )
1031         {
1032                 int bal = Bank_GetBalance(i);
1033
1034                 if( bal == INT_MIN )    continue;
1035
1036                 if( bal < minBal )      continue;
1037                 if( bal > maxBal )      continue;
1038
1039                 _SendUserInfo(Client, i);
1040         }
1041
1042         Bank_DelIterator(it);
1043
1044         sendf(Client->Socket, "200 List End\n");
1045 }
1046
1047 void Server_Cmd_USERINFO(tClient *Client, char *Args)
1048 {
1049          int    uid;
1050         char    *user = Args;
1051         char    *space;
1052
1053         space = strchr(user, ' ');
1054         if(space)       *space = '\0';
1055
1056         if( giDebugLevel )      Debug(Client, "User Info '%s'", user);
1057
1058         // Get recipient
1059         uid = Bank_GetAcctByName(user);
1060
1061         if( giDebugLevel >= 2 ) Debug(Client, "uid = %i", uid);
1062         if( uid == -1 ) {
1063                 sendf(Client->Socket, "404 Invalid user\n");
1064                 return ;
1065         }
1066
1067         _SendUserInfo(Client, uid);
1068 }
1069
1070 void _SendUserInfo(tClient *Client, int UserID)
1071 {
1072         char    *type, *disabled="", *door="";
1073          int    flags = Bank_GetFlags(UserID);
1074
1075         if( flags & USER_FLAG_INTERNAL ) {
1076                 type = "internal";
1077         }
1078         else if( flags & USER_FLAG_COKE ) {
1079                 if( flags & USER_FLAG_ADMIN )
1080                         type = "coke,admin";
1081                 else
1082                         type = "coke";
1083         }
1084         else if( flags & USER_FLAG_ADMIN ) {
1085                 type = "admin";
1086         }
1087         else {
1088                 type = "user";
1089         }
1090
1091         if( flags & USER_FLAG_DISABLED )
1092                 disabled = ",disabled";
1093         if( flags & USER_FLAG_DOORGROUP )
1094                 door = ",door";
1095
1096         // TODO: User flags/type
1097         sendf(
1098                 Client->Socket, "202 User %s %i %s%s%s\n",
1099                 Bank_GetAcctName(UserID), Bank_GetBalance(UserID),
1100                 type, disabled, door
1101                 );
1102 }
1103
1104 void Server_Cmd_USERADD(tClient *Client, char *Args)
1105 {
1106         char    *username, *space;
1107
1108         // Check permissions
1109         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1110                 sendf(Client->Socket, "403 Not a coke admin\n");
1111                 return ;
1112         }
1113
1114         // Read arguments
1115         username = Args;
1116         while( *username == ' ' )       username ++;
1117         space = strchr(username, ' ');
1118         if(space)       *space = '\0';
1119
1120         // Try to create user
1121         if( Bank_CreateAcct(username) == -1 ) {
1122                 sendf(Client->Socket, "404 User exists\n");
1123                 return ;
1124         }
1125
1126         {
1127                 char    *thisName = Bank_GetAcctName(Client->UID);
1128                 Log_Info("Account '%s' created by '%s'", username, thisName);
1129                 free(thisName);
1130         }
1131
1132         sendf(Client->Socket, "200 User Added\n");
1133 }
1134
1135 void Server_Cmd_USERFLAGS(tClient *Client, char *Args)
1136 {
1137         char    *username, *flags;
1138         char    *space;
1139          int    mask=0, value=0;
1140          int    uid;
1141
1142         // Check permissions
1143         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1144                 sendf(Client->Socket, "403 Not a coke admin\n");
1145                 return ;
1146         }
1147
1148         // Read arguments
1149         // - Username
1150         username = Args;
1151         while( *username == ' ' )       username ++;
1152         space = strchr(username, ' ');
1153         if(!space) {
1154                 sendf(Client->Socket, "407 USER_FLAGS requires 2 arguments, 1 given\n");
1155                 return ;
1156         }
1157         *space = '\0';
1158         // - Flags
1159         flags = space + 1;
1160         while( *flags == ' ' )  flags ++;
1161         space = strchr(flags, ' ');
1162         if(space)       *space = '\0';
1163
1164         // Get UID
1165         uid = Bank_GetAcctByName(username);
1166         if( uid == -1 ) {
1167                 sendf(Client->Socket, "404 User '%s' not found\n", username);
1168                 return ;
1169         }
1170
1171         // Parse flags
1172         if( Server_int_ParseFlags(Client, flags, &mask, &value) )
1173                 return ;
1174
1175         if( giDebugLevel )
1176                 Debug(Client, "Set %i(%s) flags to %x (masked %x)\n",
1177                         uid, username, mask, value);
1178
1179         // Apply flags
1180         Bank_SetFlags(uid, mask, value);
1181
1182         // Return OK
1183         sendf(Client->Socket, "200 User Updated\n");
1184 }
1185
1186 // --- INTERNAL HELPERS ---
1187 void Debug(tClient *Client, const char *Format, ...)
1188 {
1189         va_list args;
1190         //printf("%010i [%i] ", (int)time(NULL), Client->ID);
1191         printf("[%i] ", Client->ID);
1192         va_start(args, Format);
1193         vprintf(Format, args);
1194         va_end(args);
1195         printf("\n");
1196 }
1197
1198 int sendf(int Socket, const char *Format, ...)
1199 {
1200         va_list args;
1201          int    len;
1202
1203         va_start(args, Format);
1204         len = vsnprintf(NULL, 0, Format, args);
1205         va_end(args);
1206
1207         {
1208                 char    buf[len+1];
1209                 va_start(args, Format);
1210                 vsnprintf(buf, len+1, Format, args);
1211                 va_end(args);
1212
1213                 #if DEBUG_TRACE_CLIENT
1214                 printf("sendf: %s", buf);
1215                 #endif
1216
1217                 return send(Socket, buf, len, 0);
1218         }
1219 }
1220
1221 int Server_int_ParseFlags(tClient *Client, const char *Str, int *Mask, int *Value)
1222 {
1223         struct {
1224                 const char      *Name;
1225                  int    Mask;
1226                  int    Value;
1227         }       cFLAGS[] = {
1228                  {"disabled", USER_FLAG_DISABLED, USER_FLAG_DISABLED}
1229                 ,{"door", USER_FLAG_DOORGROUP, USER_FLAG_DOORGROUP}
1230                 ,{"coke", USER_FLAG_COKE, USER_FLAG_COKE}
1231                 ,{"admin", USER_FLAG_ADMIN, USER_FLAG_ADMIN}
1232                 ,{"internal", USER_FLAG_INTERNAL, USER_FLAG_INTERNAL}
1233         };
1234         const int       ciNumFlags = sizeof(cFLAGS)/sizeof(cFLAGS[0]);
1235
1236         char    *space;
1237
1238         *Mask = 0;
1239         *Value = 0;
1240
1241         do {
1242                  int    bRemove = 0;
1243                  int    i;
1244                  int    len;
1245
1246                 while( *Str == ' ' )    Str ++; // Eat whitespace
1247                 space = strchr(Str, ',');       // Find the end of the flag
1248                 if(space)
1249                         len = space - Str;
1250                 else
1251                         len = strlen(Str);
1252
1253                 // Check for inversion/removal
1254                 if( *Str == '!' || *Str == '-' ) {
1255                         bRemove = 1;
1256                         Str ++;
1257                 }
1258                 else if( *Str == '+' ) {
1259                         Str ++;
1260                 }
1261
1262                 // Check flag values
1263                 for( i = 0; i < ciNumFlags; i ++ )
1264                 {
1265                         if( strncmp(Str, cFLAGS[i].Name, len) == 0 ) {
1266                                 *Mask |= cFLAGS[i].Mask;
1267                                 *Value &= ~cFLAGS[i].Mask;
1268                                 if( !bRemove )
1269                                         *Value |= cFLAGS[i].Value;
1270                                 break;
1271                         }
1272                 }
1273
1274                 // Error check
1275                 if( i == ciNumFlags ) {
1276                         char    val[len+1];
1277                         strncpy(val, Str, len+1);
1278                         sendf(Client->Socket, "407 Unknown flag value '%s'\n", val);
1279                         return -1;
1280                 }
1281
1282                 Str = space + 1;
1283         } while(space);
1284
1285         return 0;
1286 }