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
  27 #define HASH_TYPE       SHA1
  28 #define HASH_LENGTH     20
  29
  30 #define MSG_STR_TOO_LONG        "499 Command too long (limit "EXPSTR(INPUT_BUFFER_SIZE)")\n"
  31
  32 // === TYPES ===
  33 typedef struct sClient
  34 {
  35          int    Socket; // Client socket ID
  36          int    ID;     // Client ID
  37
  38          int    bIsTrusted;     // Is the connection from a trusted host/port
  39
  40         char    *Username;
  41         char    Salt[9];
  42
  43          int    UID;
  44          int    EffectiveUID;
  45          int    bIsAuthed;
  46 }       tClient;
  47
  48 // === PROTOTYPES ===
  49 void    Server_Start(void);
  50 void    Server_Cleanup(void);
  51 void    Server_HandleClient(int Socket, int bTrusted);
  52 void    Server_ParseClientCommand(tClient *Client, char *CommandString);
  53 // --- Commands ---
  54 void    Server_Cmd_USER(tClient *Client, char *Args);
  55 void    Server_Cmd_PASS(tClient *Client, char *Args);
  56 void    Server_Cmd_AUTOAUTH(tClient *Client, char *Args);
  57 void    Server_Cmd_SETEUSER(tClient *Client, char *Args);
  58 void    Server_Cmd_ENUMITEMS(tClient *Client, char *Args);
  59 void    Server_Cmd_ITEMINFO(tClient *Client, char *Args);
  60 void    Server_Cmd_DISPENSE(tClient *Client, char *Args);
  61 void    Server_Cmd_GIVE(tClient *Client, char *Args);
  62 void    Server_Cmd_DONATE(tClient *Client, char *Args);
  63 void    Server_Cmd_ADD(tClient *Client, char *Args);
  64 void    Server_Cmd_ENUMUSERS(tClient *Client, char *Args);
  65 void    Server_Cmd_USERINFO(tClient *Client, char *Args);
  66 void    _SendUserInfo(tClient *Client, int UserID);
  67 void    Server_Cmd_USERADD(tClient *Client, char *Args);
  68 void    Server_Cmd_USERFLAGS(tClient *Client, char *Args);
  69 // --- Helpers ---
  70  int    Server_int_ParseFlags(tClient *Client, const char *Str, int *Mask, int *Value);
  71  int    sendf(int Socket, const char *Format, ...);
  72
  73 // === CONSTANTS ===
  74 // - Commands
  75 const struct sClientCommand {
  76         const char      *Name;
  77         void    (*Function)(tClient *Client, char *Arguments);
  78 }       gaServer_Commands[] = {
  79         {"USER", Server_Cmd_USER},
  80         {"PASS", Server_Cmd_PASS},
  81         {"AUTOAUTH", Server_Cmd_AUTOAUTH},
  82         {"SETEUSER", Server_Cmd_SETEUSER},
  83         {"ENUM_ITEMS", Server_Cmd_ENUMITEMS},
  84         {"ITEM_INFO", Server_Cmd_ITEMINFO},
  85         {"DISPENSE", Server_Cmd_DISPENSE},
  86         {"GIVE", Server_Cmd_GIVE},
  87         {"DONATE", Server_Cmd_DONATE},
  88         {"ADD", Server_Cmd_ADD},
  89         {"ENUM_USERS", Server_Cmd_ENUMUSERS},
  90         {"USER_INFO", Server_Cmd_USERINFO},
  91         {"USER_ADD", Server_Cmd_USERADD},
  92         {"USER_FLAGS", Server_Cmd_USERFLAGS}
  93 };
  94 #define NUM_COMMANDS    ((int)(sizeof(gaServer_Commands)/sizeof(gaServer_Commands[0])))
  95
  96 // === GLOBALS ===
  97  int    giServer_Port = 1020;
  98  int    giServer_NextClientID = 1;
  99  int    giServer_Socket;
 100
 101 // === CODE ===
 102 /**
 103  * \brief Open listenting socket and serve connections
 104  */
 105 void Server_Start(void)
 106 {
 107          int    client_socket;
 108         struct sockaddr_in      server_addr, client_addr;
 109
 110         atexit(Server_Cleanup);
 111
 112         // Create Server
 113         giServer_Socket = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 114         if( giServer_Socket < 0 ) {
 115                 fprintf(stderr, "ERROR: Unable to create server socket\n");
 116                 return ;
 117         }
 118
 119         // Make listen address
 120         memset(&server_addr, 0, sizeof(server_addr));
 121         server_addr.sin_family = AF_INET;       // Internet Socket
 122         server_addr.sin_addr.s_addr = htonl(INADDR_ANY);        // Listen on all interfaces
 123         server_addr.sin_port = htons(giServer_Port);    // Port
 124
 125         // Bind
 126         if( bind(giServer_Socket, (struct sockaddr *) &server_addr, sizeof(server_addr)) < 0 ) {
 127                 fprintf(stderr, "ERROR: Unable to bind to 0.0.0.0:%i\n", giServer_Port);
 128                 perror("Binding");
 129                 return ;
 130         }
 131
 132         // Listen
 133         if( listen(giServer_Socket, MAX_CONNECTION_QUEUE) < 0 ) {
 134                 fprintf(stderr, "ERROR: Unable to listen to socket\n");
 135                 perror("Listen");
 136                 return ;
 137         }
 138
 139         printf("Listening on 0.0.0.0:%i\n", giServer_Port);
 140
 141         for(;;)
 142         {
 143                 uint    len = sizeof(client_addr);
 144                  int    bTrusted = 0;
 145
 146                 client_socket = accept(giServer_Socket, (struct sockaddr *) &client_addr, &len);
 147                 if(client_socket < 0) {
 148                         fprintf(stderr, "ERROR: Unable to accept client connection\n");
 149                         return ;
 150                 }
 151
 152                 if(giDebugLevel >= 2) {
 153                         char    ipstr[INET_ADDRSTRLEN];
 154                         inet_ntop(AF_INET, &client_addr.sin_addr, ipstr, INET_ADDRSTRLEN);
 155                         printf("Client connection from %s:%i\n",
 156                                 ipstr, ntohs(client_addr.sin_port));
 157                 }
 158
 159                 // Trusted Connections
 160                 if( ntohs(client_addr.sin_port) < 1024 )
 161                 {
 162                         // TODO: Make this runtime configurable
 163                         switch( ntohl( client_addr.sin_addr.s_addr ) )
 164                         {
 165                         case 0x7F000001:        // 127.0.0.1    localhost
 166                         //case 0x825E0D00:      // 130.95.13.0
 167                         case 0x825E0D12:        // 130.95.13.18 mussel
 168                         case 0x825E0D17:        // 130.95.13.23 martello
 169                                 bTrusted = 1;
 170                                 break;
 171                         default:
 172                                 break;
 173                         }
 174                 }
 175
 176                 // TODO: Multithread this?
 177                 Server_HandleClient(client_socket, bTrusted);
 178
 179                 close(client_socket);
 180         }
 181 }
 182
 183 void Server_Cleanup(void)
 184 {
 185         printf("Close(%i)\n", giServer_Socket);
 186         close(giServer_Socket);
 187 }
 188
 189 /**
 190  * \brief Reads from a client socket and parses the command strings
 191  * \param Socket        Client socket number/handle
 192  * \param bTrusted      Is the client trusted?
 193  */
 194 void Server_HandleClient(int Socket, int bTrusted)
 195 {
 196         char    inbuf[INPUT_BUFFER_SIZE];
 197         char    *buf = inbuf;
 198          int    remspace = INPUT_BUFFER_SIZE-1;
 199          int    bytes = -1;
 200         tClient clientInfo;
 201
 202         memset(&clientInfo, 0, sizeof(clientInfo));
 203
 204         // Initialise Client info
 205         clientInfo.Socket = Socket;
 206         clientInfo.ID = giServer_NextClientID ++;
 207         clientInfo.bIsTrusted = bTrusted;
 208         clientInfo.EffectiveUID = -1;
 209
 210         // Read from client
 211         /*
 212          * Notes:
 213          * - The `buf` and `remspace` variables allow a line to span several
 214          *   calls to recv(), if a line is not completed in one recv() call
 215          *   it is saved to the beginning of `inbuf` and `buf` is updated to
 216          *   the end of it.
 217          */
 218         while( (bytes = recv(Socket, buf, remspace, 0)) > 0 )
 219         {
 220                 char    *eol, *start;
 221                 buf[bytes] = '\0';      // Allow us to use stdlib string functions on it
 222
 223                 // Split by lines
 224                 start = inbuf;
 225                 while( (eol = strchr(start, '\n')) )
 226                 {
 227                         *eol = '\0';
 228
 229                         Server_ParseClientCommand(&clientInfo, start);
 230
 231                         start = eol + 1;
 232                 }
 233
 234                 // Check if there was an incomplete line
 235                 if( *start != '\0' ) {
 236                          int    tailBytes = bytes - (start-buf);
 237                         // Roll back in buffer
 238                         memcpy(inbuf, start, tailBytes);
 239                         remspace -= tailBytes;
 240                         if(remspace == 0) {
 241                                 send(Socket, MSG_STR_TOO_LONG, sizeof(MSG_STR_TOO_LONG), 0);
 242                                 buf = inbuf;
 243                                 remspace = INPUT_BUFFER_SIZE - 1;
 244                         }
 245                 }
 246                 else {
 247                         buf = inbuf;
 248                         remspace = INPUT_BUFFER_SIZE - 1;
 249                 }
 250         }
 251
 252         // Check for errors
 253         if( bytes < 0 ) {
 254                 fprintf(stderr, "ERROR: Unable to recieve from client on socket %i\n", Socket);
 255                 return ;
 256         }
 257
 258         if(giDebugLevel >= 2) {
 259                 printf("Client %i: Disconnected\n", clientInfo.ID);
 260         }
 261 }
 262
 263 /**
 264  * \brief Parses a client command and calls the required helper function
 265  * \param Client        Pointer to client state structure
 266  * \param CommandString Command from client (single line of the command)
 267  * \return Heap String to return to the client
 268  */
 269 void Server_ParseClientCommand(tClient *Client, char *CommandString)
 270 {
 271         char    *space, *args;
 272          int    i;
 273         #if 0
 274         char    **argList;
 275          int    numArgs = 0;
 276         #endif
 277
 278         // Split at first space
 279         space = strchr(CommandString, ' ');
 280         if(space == NULL) {
 281                 args = NULL;
 282         }
 283         else {
 284                 *space = '\0';
 285                 args = space + 1;
 286                 while( *space == ' ' )  space ++;
 287
 288                 #if 0
 289                 // Count arguments
 290                 numArgs = 1;
 291                 for( i = 0; args[i]; )
 292                 {
 293                         while( CommandString[i] != ' ' ) {
 294                                 if( CommandString[i] == '"' ) {
 295                                         while( !(CommandString[i] != '\\' CommandString[i+1] == '"' ) )
 296                                                 i ++;
 297                                         i ++;
 298                                 }
 299                                 i ++;
 300                         }
 301                         numArgs ++;
 302                         while( CommandString[i] == ' ' )        i ++;
 303                 }
 304                 #endif
 305         }
 306
 307
 308         // Find command
 309         for( i = 0; i < NUM_COMMANDS; i++ )
 310         {
 311                 if(strcmp(CommandString, gaServer_Commands[i].Name) == 0) {
 312                         gaServer_Commands[i].Function(Client, args);
 313                         return ;
 314                 }
 315         }
 316
 317         sendf(Client->Socket, "400 Unknown Command\n");
 318 }
 319
 320 // ---
 321 // Commands
 322 // ---
 323 /**
 324  * \brief Set client username
 325  *
 326  * Usage: USER <username>
 327  */
 328 void Server_Cmd_USER(tClient *Client, char *Args)
 329 {
 330         char    *space = strchr(Args, ' ');
 331         if(space)       *space = '\0';  // Remove characters after the ' '
 332
 333         // Debug!
 334         if( giDebugLevel )
 335                 printf("Client %i authenticating as '%s'\n", Client->ID, Args);
 336
 337         // Save username
 338         if(Client->Username)
 339                 free(Client->Username);
 340         Client->Username = strdup(Args);
 341
 342         #if USE_SALT
 343         // Create a salt (that changes if the username is changed)
 344         // Yes, I know, I'm a little paranoid, but who isn't?
 345         Client->Salt[0] = 0x21 + (rand()&0x3F);
 346         Client->Salt[1] = 0x21 + (rand()&0x3F);
 347         Client->Salt[2] = 0x21 + (rand()&0x3F);
 348         Client->Salt[3] = 0x21 + (rand()&0x3F);
 349         Client->Salt[4] = 0x21 + (rand()&0x3F);
 350         Client->Salt[5] = 0x21 + (rand()&0x3F);
 351         Client->Salt[6] = 0x21 + (rand()&0x3F);
 352         Client->Salt[7] = 0x21 + (rand()&0x3F);
 353
 354         // TODO: Also send hash type to use, (SHA1 or crypt according to [DAA])
 355         sendf(Client->Socket, "100 SALT %s\n", Client->Salt);
 356         #else
 357         sendf(Client->Socket, "100 User Set\n");
 358         #endif
 359 }
 360
 361 /**
 362  * \brief Authenticate as a user
 363  *
 364  * Usage: PASS <hash>
 365  */
 366 void Server_Cmd_PASS(tClient *Client, char *Args)
 367 {
 368         char    *space = strchr(Args, ' ');
 369         if(space)       *space = '\0';  // Remove characters after the ' '
 370
 371         // Pass on to cokebank
 372         Client->UID = Bank_GetUserAuth(Client->Salt, Client->Username, Args);
 373
 374         if( Client->UID != -1 ) {
 375                 Client->bIsAuthed = 1;
 376                 sendf(Client->Socket, "200 Auth OK\n");
 377                 return ;
 378         }
 379
 380         sendf(Client->Socket, "401 Auth Failure\n");
 381 }
 382
 383 /**
 384  * \brief Authenticate as a user without a password
 385  *
 386  * Usage: AUTOAUTH <user>
 387  */
 388 void Server_Cmd_AUTOAUTH(tClient *Client, char *Args)
 389 {
 390         char    *space = strchr(Args, ' ');
 391         if(space)       *space = '\0';  // Remove characters after the ' '
 392
 393         // Check if trusted
 394         if( !Client->bIsTrusted ) {
 395                 if(giDebugLevel)
 396                         printf("Client %i: Untrusted client attempting to AUTOAUTH\n", Client->ID);
 397                 sendf(Client->Socket, "401 Untrusted\n");
 398                 return ;
 399         }
 400
 401         // Get UID
 402         Client->UID = Bank_GetAcctByName( Args );
 403         if( Client->UID < 0 ) {
 404                 if(giDebugLevel)
 405                         printf("Client %i: Unknown user '%s'\n", Client->ID, Args);
 406                 sendf(Client->Socket, "401 Auth Failure\n");
 407                 return ;
 408         }
 409
 410         // You can't be an internal account
 411         if( Bank_GetFlags(Client->UID) & USER_FLAG_INTERNAL ) {
 412                 Client->UID = -1;
 413                 sendf(Client->Socket, "401 Auth Failure\n");
 414                 return ;
 415         }
 416
 417         if(giDebugLevel)
 418                 printf("Client %i: Authenticated as '%s' (%i)\n", Client->ID, Args, Client->UID);
 419
 420         sendf(Client->Socket, "200 Auth OK\n");
 421 }
 422
 423 /**
 424  * \brief Set effective user
 425  */
 426 void Server_Cmd_SETEUSER(tClient *Client, char *Args)
 427 {
 428         char    *space;
 429
 430         space = strchr(Args, ' ');
 431
 432         if(space)       *space = '\0';
 433
 434         if( !strlen(Args) ) {
 435                 sendf(Client->Socket, "407 SETEUSER expects an argument\n");
 436                 return ;
 437         }
 438
 439         // Check user permissions
 440         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_COKE) ) {
 441                 sendf(Client->Socket, "403 Not in coke\n");
 442                 return ;
 443         }
 444
 445         // Set id
 446         Client->EffectiveUID = Bank_GetAcctByName(Args);
 447         if( Client->EffectiveUID == -1 ) {
 448                 sendf(Client->Socket, "404 User not found\n");
 449                 return ;
 450         }
 451
 452         // You can't be an internal account
 453         if( Bank_GetFlags(Client->EffectiveUID) & USER_FLAG_INTERNAL ) {
 454                 Client->EffectiveUID = -1;
 455                 sendf(Client->Socket, "404 User not found\n");
 456                 return ;
 457         }
 458
 459         sendf(Client->Socket, "200 User set\n");
 460 }
 461
 462 /**
 463  * \brief Enumerate the items that the server knows about
 464  */
 465 void Server_Cmd_ENUMITEMS(tClient *Client, char *Args)
 466 {
 467          int    i;
 468
 469         if( Args != NULL && strlen(Args) ) {
 470                 sendf(Client->Socket, "407 ENUM_ITEMS takes no arguments\n");
 471                 return ;
 472         }
 473
 474         sendf(Client->Socket, "201 Items %i\n", giNumItems);
 475
 476         for( i = 0; i < giNumItems; i ++ ) {
 477                 sendf(Client->Socket,
 478                         "202 Item %s:%i %i %s\n",
 479                          gaItems[i].Handler->Name, gaItems[i].ID, gaItems[i].Price, gaItems[i].Name
 480                          );
 481         }
 482
 483         sendf(Client->Socket, "200 List end\n");
 484 }
 485
 486 tItem *_GetItemFromString(char *String)
 487 {
 488         tHandler        *handler;
 489         char    *type = String;
 490         char    *colon = strchr(String, ':');
 491          int    num, i;
 492
 493         if( !colon ) {
 494                 return NULL;
 495         }
 496
 497         num = atoi(colon+1);
 498         *colon = '\0';
 499
 500         // Find handler
 501         handler = NULL;
 502         for( i = 0; i < giNumHandlers; i ++ )
 503         {
 504                 if( strcmp(gaHandlers[i]->Name, type) == 0) {
 505                         handler = gaHandlers[i];
 506                         break;
 507                 }
 508         }
 509         if( !handler ) {
 510                 return NULL;
 511         }
 512
 513         // Find item
 514         for( i = 0; i < giNumItems; i ++ )
 515         {
 516                 if( gaItems[i].Handler != handler )     continue;
 517                 if( gaItems[i].ID != num )      continue;
 518                 return &gaItems[i];
 519         }
 520         return NULL;
 521 }
 522
 523 /**
 524  * \brief Fetch information on a specific item
 525  */
 526 void Server_Cmd_ITEMINFO(tClient *Client, char *Args)
 527 {
 528         tItem   *item = _GetItemFromString(Args);
 529
 530         if( !item ) {
 531                 sendf(Client->Socket, "406 Bad Item ID\n");
 532                 return ;
 533         }
 534
 535         sendf(Client->Socket,
 536                 "202 Item %s:%i %i %s\n",
 537                  item->Handler->Name, item->ID, item->Price, item->Name
 538                  );
 539 }
 540
 541 void Server_Cmd_DISPENSE(tClient *Client, char *Args)
 542 {
 543         tItem   *item;
 544          int    ret;
 545          int    uid;
 546
 547         if( !Client->bIsAuthed ) {
 548                 sendf(Client->Socket, "401 Not Authenticated\n");
 549                 return ;
 550         }
 551
 552         item = _GetItemFromString(Args);
 553         if( !item ) {
 554                 sendf(Client->Socket, "406 Bad Item ID\n");
 555                 return ;
 556         }
 557
 558         if( Client->EffectiveUID != -1 ) {
 559                 uid = Client->EffectiveUID;
 560         }
 561         else {
 562                 uid = Client->UID;
 563         }
 564
 565         switch( ret = DispenseItem( Client->UID, uid, item ) )
 566         {
 567         case 0: sendf(Client->Socket, "200 Dispense OK\n");     return ;
 568         case 1: sendf(Client->Socket, "501 Unable to dispense\n");      return ;
 569         case 2: sendf(Client->Socket, "402 Poor You\n");        return ;
 570         default:
 571                 sendf(Client->Socket, "500 Dispense Error\n");
 572                 return ;
 573         }
 574 }
 575
 576 void Server_Cmd_GIVE(tClient *Client, char *Args)
 577 {
 578         char    *recipient, *ammount, *reason;
 579          int    uid, iAmmount;
 580          int    thisUid;
 581
 582         if( !Client->bIsAuthed ) {
 583                 sendf(Client->Socket, "401 Not Authenticated\n");
 584                 return ;
 585         }
 586
 587         recipient = Args;
 588
 589         ammount = strchr(Args, ' ');
 590         if( !ammount ) {
 591                 sendf(Client->Socket, "407 Invalid Argument, expected 3 parameters, 1 encountered\n");
 592                 return ;
 593         }
 594         *ammount = '\0';
 595         ammount ++;
 596
 597         reason = strchr(ammount, ' ');
 598         if( !reason ) {
 599                 sendf(Client->Socket, "407 Invalid Argument, expected 3 parameters, 2 encountered\n");
 600                 return ;
 601         }
 602         *reason = '\0';
 603         reason ++;
 604
 605         // Get recipient
 606         uid = Bank_GetAcctByName(recipient);
 607         if( uid == -1 ) {
 608                 sendf(Client->Socket, "404 Invalid target user\n");
 609                 return ;
 610         }
 611
 612         // You can't alter an internal account
 613         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 614                 sendf(Client->Socket, "404 Invalid target user\n");
 615                 return ;
 616         }
 617
 618         // Parse ammount
 619         iAmmount = atoi(ammount);
 620         if( iAmmount <= 0 ) {
 621                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 622                 return ;
 623         }
 624
 625         if( Client->EffectiveUID != -1 ) {
 626                 thisUid = Client->EffectiveUID;
 627         }
 628         else {
 629                 thisUid = Client->UID;
 630         }
 631
 632         // Do give
 633         switch( DispenseGive(Client->UID, thisUid, uid, iAmmount, reason) )
 634         {
 635         case 0:
 636                 sendf(Client->Socket, "200 Give OK\n");
 637                 return ;
 638         case 2:
 639                 sendf(Client->Socket, "402 Poor You\n");
 640                 return ;
 641         default:
 642                 sendf(Client->Socket, "500 Unknown error\n");
 643                 return ;
 644         }
 645 }
 646
 647 void Server_Cmd_DONATE(tClient *Client, char *Args)
 648 {
 649         char    *ammount, *reason;
 650          int    iAmmount;
 651          int    thisUid;
 652
 653         if( !Client->bIsAuthed ) {
 654                 sendf(Client->Socket, "401 Not Authenticated\n");
 655                 return ;
 656         }
 657
 658         ammount = Args;
 659
 660         // Get the start of the reason
 661         reason = strchr(Args, ' ');
 662         if( !ammount ) {
 663                 sendf(Client->Socket, "407 Invalid Argument, expected 2 parameters, 1 encountered\n");
 664                 return ;
 665         }
 666         *reason = '\0';
 667         reason ++;
 668
 669         // Check the end of the reason
 670         if( strchr(reason, ' ') ) {
 671                 sendf(Client->Socket, "407 Invalid Argument, expected 2 parameters, more encountered\n");
 672                 return ;
 673         }
 674
 675         // Parse ammount
 676         iAmmount = atoi(ammount);
 677         if( iAmmount <= 0 ) {
 678                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 679                 return ;
 680         }
 681
 682         // Handle effective users
 683         if( Client->EffectiveUID != -1 ) {
 684                 thisUid = Client->EffectiveUID;
 685         }
 686         else {
 687                 thisUid = Client->UID;
 688         }
 689
 690         // Do give
 691         switch( DispenseDonate(Client->UID, thisUid, iAmmount, reason) )
 692         {
 693         case 0:
 694                 sendf(Client->Socket, "200 Give OK\n");
 695                 return ;
 696         case 2:
 697                 sendf(Client->Socket, "402 Poor You\n");
 698                 return ;
 699         default:
 700                 sendf(Client->Socket, "500 Unknown error\n");
 701                 return ;
 702         }
 703 }
 704
 705 void Server_Cmd_ADD(tClient *Client, char *Args)
 706 {
 707         char    *user, *ammount, *reason;
 708          int    uid, iAmmount;
 709
 710         if( !Client->bIsAuthed ) {
 711                 sendf(Client->Socket, "401 Not Authenticated\n");
 712                 return ;
 713         }
 714
 715         user = Args;
 716
 717         ammount = strchr(Args, ' ');
 718         if( !ammount ) {
 719                 sendf(Client->Socket, "407 Invalid Argument, expected 3 parameters, 1 encountered\n");
 720                 return ;
 721         }
 722         *ammount = '\0';
 723         ammount ++;
 724
 725         reason = strchr(ammount, ' ');
 726         if( !reason ) {
 727                 sendf(Client->Socket, "407 Invalid Argument, expected 3 parameters, 2 encountered\n");
 728                 return ;
 729         }
 730         *reason = '\0';
 731         reason ++;
 732
 733         // Check user permissions
 734         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_COKE)  ) {
 735                 sendf(Client->Socket, "403 Not in coke\n");
 736                 return ;
 737         }
 738
 739         // Get recipient
 740         uid = Bank_GetAcctByName(user);
 741         if( uid == -1 ) {
 742                 sendf(Client->Socket, "404 Invalid user\n");
 743                 return ;
 744         }
 745
 746         // You can't alter an internal account
 747         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 748                 sendf(Client->Socket, "404 Invalid user\n");
 749                 return ;
 750         }
 751
 752         // Parse ammount
 753         iAmmount = atoi(ammount);
 754         if( iAmmount == 0 && ammount[0] != '0' ) {
 755                 sendf(Client->Socket, "407 Invalid Argument\n");
 756                 return ;
 757         }
 758
 759         // Do give
 760         switch( DispenseAdd(Client->UID, uid, iAmmount, reason) )
 761         {
 762         case 0:
 763                 sendf(Client->Socket, "200 Add OK\n");
 764                 return ;
 765         case 2:
 766                 sendf(Client->Socket, "402 Poor Guy\n");
 767                 return ;
 768         default:
 769                 sendf(Client->Socket, "500 Unknown error\n");
 770                 return ;
 771         }
 772 }
 773
 774 void Server_Cmd_ENUMUSERS(tClient *Client, char *Args)
 775 {
 776          int    i, numRet = 0;
 777         tAcctIterator   *it;
 778          int    maxBal = INT_MAX, minBal = INT_MIN;
 779          int    flagMask = 0, flagVal = 0;
 780          int    sort = BANK_ITFLAG_SORT_NAME;
 781         time_t  lastSeenAfter=0, lastSeenBefore=0;
 782
 783          int    flags;  // Iterator flags
 784          int    balValue;       // Balance value for iterator
 785         time_t  timeValue;      // Time value for iterator
 786
 787         // Parse arguments
 788         if( Args && strlen(Args) )
 789         {
 790                 char    *space = Args, *type, *val;
 791                 do
 792                 {
 793                         type = space;
 794                         // Get next space
 795                         space = strchr(space, ' ');
 796                         if(space)       *space = '\0';
 797
 798                         // Get type
 799                         val = strchr(type, ':');
 800                         if( val ) {
 801                                 *val = '\0';
 802                                 val ++;
 803
 804                                 // Types
 805                                 // - Minium Balance
 806                                 if( strcmp(type, "min_balance") == 0 ) {
 807                                         minBal = atoi(val);
 808                                 }
 809                                 // - Maximum Balance
 810                                 else if( strcmp(type, "max_balance") == 0 ) {
 811                                         maxBal = atoi(val);
 812                                 }
 813                                 // - Flags
 814                                 else if( strcmp(type, "flags") == 0 ) {
 815                                         if( Server_int_ParseFlags(Client, val, &flagMask, &flagVal) )
 816                                                 return ;
 817                                 }
 818                                 // - Last seen before timestamp
 819                                 else if( strcmp(type, "last_seen_before") == 0 ) {
 820                                         lastSeenAfter = atoll(val);
 821                                 }
 822                                 // - Last seen after timestamp
 823                                 else if( strcmp(type, "last_seen_after") == 0 ) {
 824                                         lastSeenAfter = atoll(val);
 825                                 }
 826                                 // - Sorting
 827                                 else if( strcmp(type, "sort") == 0 ) {
 828                                         char    *dash = strchr(val, '-');
 829                                         if( dash ) {
 830                                                 *dash = '\0';
 831                                                 dash ++;
 832                                         }
 833                                         if( strcmp(val, "name") == 0 ) {
 834                                                 sort = BANK_ITFLAG_SORT_NAME;
 835                                         }
 836                                         else if( strcmp(val, "balance") == 0 ) {
 837                                                 sort = BANK_ITFLAG_SORT_BAL;
 838                                         }
 839                                         else if( strcmp(val, "lastseen") == 0 ) {
 840                                                 sort = BANK_ITFLAG_SORT_LASTSEEN;
 841                                         }
 842                                         else {
 843                                                 sendf(Client->Socket, "407 Unknown sort field ('%s')\n", val);
 844                                                 return ;
 845                                         }
 846                                         // Handle sort direction
 847                                         if( dash ) {
 848                                                 if( strcmp(dash, "desc") == 0 ) {
 849                                                         sort |= BANK_ITFLAG_REVSORT;
 850                                                 }
 851                                                 else {
 852                                                         sendf(Client->Socket, "407 Unknown sort direction '%s'\n", dash);
 853                                                         return ;
 854                                                 }
 855                                                 dash[-1] = '-';
 856                                         }
 857                                 }
 858                                 else {
 859                                         sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s:%s'\n", type, val);
 860                                         return ;
 861                                 }
 862
 863                                 val[-1] = ':';
 864                         }
 865                         else {
 866                                 sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s'\n", type);
 867                                 return ;
 868                         }
 869
 870                         // Eat whitespace
 871                         if( space ) {
 872                                 *space = ' ';   // Repair (to be nice)
 873                                 space ++;
 874                                 while(*space == ' ')    space ++;
 875                         }
 876                 }       while(space);
 877         }
 878
 879         // Create iterator
 880         if( maxBal != INT_MAX ) {
 881                 flags = sort|BANK_ITFLAG_MAXBALANCE;
 882                 balValue = maxBal;
 883         }
 884         else if( minBal != INT_MIN ) {
 885                 flags = sort|BANK_ITFLAG_MINBALANCE;
 886                 balValue = minBal;
 887         }
 888         else {
 889                 flags = sort;
 890                 balValue = 0;
 891         }
 892         if( lastSeenBefore ) {
 893                 timeValue = lastSeenBefore;
 894                 flags |= BANK_ITFLAG_SEENBEFORE;
 895         }
 896         else if( lastSeenAfter ) {
 897                 timeValue = lastSeenAfter;
 898                 flags |= BANK_ITFLAG_SEENAFTER;
 899         }
 900         else {
 901                 timeValue = 0;
 902         }
 903         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
 904
 905         // Get return number
 906         while( (i = Bank_IteratorNext(it)) != -1 )
 907         {
 908                 int bal = Bank_GetBalance(i);
 909
 910                 if( bal == INT_MIN )    continue;
 911
 912                 if( bal < minBal )      continue;
 913                 if( bal > maxBal )      continue;
 914
 915                 numRet ++;
 916         }
 917
 918         Bank_DelIterator(it);
 919
 920         // Send count
 921         sendf(Client->Socket, "201 Users %i\n", numRet);
 922
 923
 924         // Create iterator
 925         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
 926
 927         while( (i = Bank_IteratorNext(it)) != -1 )
 928         {
 929                 int bal = Bank_GetBalance(i);
 930
 931                 if( bal == INT_MIN )    continue;
 932
 933                 if( bal < minBal )      continue;
 934                 if( bal > maxBal )      continue;
 935
 936                 _SendUserInfo(Client, i);
 937         }
 938
 939         Bank_DelIterator(it);
 940
 941         sendf(Client->Socket, "200 List End\n");
 942 }
 943
 944 void Server_Cmd_USERINFO(tClient *Client, char *Args)
 945 {
 946          int    uid;
 947         char    *user = Args;
 948         char    *space;
 949
 950         space = strchr(user, ' ');
 951         if(space)       *space = '\0';
 952
 953         // Get recipient
 954         uid = Bank_GetAcctByName(user);
 955         if( uid == -1 ) {
 956                 sendf(Client->Socket, "404 Invalid user");
 957                 return ;
 958         }
 959
 960         _SendUserInfo(Client, uid);
 961 }
 962
 963 void _SendUserInfo(tClient *Client, int UserID)
 964 {
 965         char    *type, *disabled="", *door="";
 966          int    flags = Bank_GetFlags(UserID);
 967
 968         if( flags & USER_FLAG_INTERNAL ) {
 969                 type = "internal";
 970         }
 971         else if( flags & USER_FLAG_COKE ) {
 972                 if( flags & USER_FLAG_ADMIN )
 973                         type = "coke,admin";
 974                 else
 975                         type = "coke";
 976         }
 977         else if( flags & USER_FLAG_ADMIN ) {
 978                 type = "admin";
 979         }
 980         else {
 981                 type = "user";
 982         }
 983
 984         if( flags & USER_FLAG_DISABLED )
 985                 disabled = ",disabled";
 986         if( flags & USER_FLAG_DOORGROUP )
 987                 door = ",door";
 988
 989         // TODO: User flags/type
 990         sendf(
 991                 Client->Socket, "202 User %s %i %s%s\n",
 992                 Bank_GetAcctName(UserID), Bank_GetBalance(UserID),
 993                 type, disabled
 994                 );
 995 }
 996
 997 void Server_Cmd_USERADD(tClient *Client, char *Args)
 998 {
 999         char    *username, *space;
1000
1001         // Check permissions
1002         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1003                 sendf(Client->Socket, "403 Not a coke admin\n");
1004                 return ;
1005         }
1006
1007         // Read arguments
1008         username = Args;
1009         while( *username == ' ' )       username ++;
1010         space = strchr(username, ' ');
1011         if(space)       *space = '\0';
1012
1013         // Try to create user
1014         if( Bank_CreateAcct(username) == -1 ) {
1015                 sendf(Client->Socket, "404 User exists\n");
1016                 return ;
1017         }
1018
1019         {
1020                 char    *thisName = Bank_GetAcctName(Client->UID);
1021                 Log_Info("Account '%s' created by '%s'", username, thisName);
1022                 free(thisName);
1023         }
1024
1025         sendf(Client->Socket, "200 User Added\n");
1026 }
1027
1028 void Server_Cmd_USERFLAGS(tClient *Client, char *Args)
1029 {
1030         char    *username, *flags;
1031         char    *space;
1032          int    mask=0, value=0;
1033          int    uid;
1034
1035         // Check permissions
1036         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1037                 sendf(Client->Socket, "403 Not a coke admin\n");
1038                 return ;
1039         }
1040
1041         // Read arguments
1042         // - Username
1043         username = Args;
1044         while( *username == ' ' )       username ++;
1045         space = strchr(username, ' ');
1046         if(!space) {
1047                 sendf(Client->Socket, "407 USER_FLAGS requires 2 arguments, 1 given\n");
1048                 return ;
1049         }
1050         *space = '\0';
1051         // - Flags
1052         flags = space + 1;
1053         while( *flags == ' ' )  flags ++;
1054         space = strchr(flags, ' ');
1055         if(space)       *space = '\0';
1056
1057         // Get UID
1058         uid = Bank_GetAcctByName(username);
1059         if( uid == -1 ) {
1060                 sendf(Client->Socket, "404 User '%s' not found\n", username);
1061                 return ;
1062         }
1063
1064         // Parse flags
1065         if( Server_int_ParseFlags(Client, flags, &mask, &value) )
1066                 return ;
1067
1068         // Apply flags
1069         Bank_SetFlags(uid, mask, value);
1070
1071         // Return OK
1072         sendf(Client->Socket, "200 User Updated\n");
1073 }
1074
1075 // --- INTERNAL HELPERS ---
1076 int sendf(int Socket, const char *Format, ...)
1077 {
1078         va_list args;
1079          int    len;
1080
1081         va_start(args, Format);
1082         len = vsnprintf(NULL, 0, Format, args);
1083         va_end(args);
1084
1085         {
1086                 char    buf[len+1];
1087                 va_start(args, Format);
1088                 vsnprintf(buf, len+1, Format, args);
1089                 va_end(args);
1090
1091                 #if DEBUG_TRACE_CLIENT
1092                 printf("sendf: %s", buf);
1093                 #endif
1094
1095                 return send(Socket, buf, len, 0);
1096         }
1097 }
1098
1099 int Server_int_ParseFlags(tClient *Client, const char *Str, int *Mask, int *Value)
1100 {
1101         struct {
1102                 const char      *Name;
1103                  int    Mask;
1104                  int    Value;
1105         }       cFLAGS[] = {
1106                  {"disabled", USER_FLAG_DISABLED, USER_FLAG_DISABLED}
1107                 ,{"door", USER_FLAG_DOORGROUP, USER_FLAG_DOORGROUP}
1108                 ,{"coke", USER_FLAG_COKE, USER_FLAG_COKE}
1109                 ,{"admin", USER_FLAG_ADMIN, USER_FLAG_ADMIN}
1110                 ,{"internal", USER_FLAG_INTERNAL, USER_FLAG_INTERNAL}
1111         };
1112         const int       ciNumFlags = sizeof(cFLAGS)/sizeof(cFLAGS[0]);
1113
1114         char    *space;
1115
1116         *Mask = 0;
1117         *Value = 0;
1118
1119         do {
1120                  int    bRemove = 0;
1121                  int    i;
1122                  int    len;
1123
1124                 while( *Str == ' ' )    Str ++; // Eat whitespace
1125                 space = strchr(Str, ',');       // Find the end of the flag
1126                 if(space)
1127                         len = space - Str;
1128                 else
1129                         len = strlen(Str);
1130
1131                 // Check for inversion/removal
1132                 if( *Str == '!' || *Str == '-' ) {
1133                         bRemove = 1;
1134                         Str ++;
1135                 }
1136                 else if( *Str == '+' ) {
1137                         Str ++;
1138                 }
1139
1140                 // Check flag values
1141                 for( i = 0; i < ciNumFlags; i ++ )
1142                 {
1143                         if( strncmp(Str, cFLAGS[i].Name, len) == 0 ) {
1144                                 *Mask |= cFLAGS[i].Mask;
1145                                 *Value &= ~cFLAGS[i].Mask;
1146                                 if( !bRemove )
1147                                         *Value |= cFLAGS[i].Value;
1148                                 break;
1149                         }
1150                 }
1151
1152                 // Error check
1153                 if( i == ciNumFlags ) {
1154                         char    val[len+1];
1155                         strncpy(val, Str, len+1);
1156                         sendf(Client->Socket, "407 Unknown flag value '%s'\n", val);
1157                         return -1;
1158                 }
1159
1160                 Str = space + 1;
1161         } while(space);
1162
1163         return 0;
1164 }