src/server/server.c

   1 /*
   2  * OpenDispense 2
   3  * UCC (University [of WA] Computer Club) Electronic Accounting System
   4  *
   5  * server.c - Client Server Code
   6  *
   7  * This file is licenced under the 3-clause BSD Licence. See the file
   8  * COPYING for full details.
   9  */
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include "common.h"
  13 #include <sys/socket.h>
  14 #include <netinet/in.h>
  15 #include <arpa/inet.h>
  16 #include <unistd.h>
  17 #include <string.h>
  18 #include <limits.h>
  19 #include <stdarg.h>
  20
  21 #define DEBUG_TRACE_CLIENT      0
  22
  23 // Statistics
  24 #define MAX_CONNECTION_QUEUE    5
  25 #define INPUT_BUFFER_SIZE       256
  26 #define CLIENT_TIMEOUT  10      // Seconds
  27
  28 #define HASH_TYPE       SHA1
  29 #define HASH_LENGTH     20
  30
  31 #define MSG_STR_TOO_LONG        "499 Command too long (limit "EXPSTR(INPUT_BUFFER_SIZE)")\n"
  32
  33 // === TYPES ===
  34 typedef struct sClient
  35 {
  36          int    Socket; // Client socket ID
  37          int    ID;     // Client ID
  38
  39          int    bIsTrusted;     // Is the connection from a trusted host/port
  40
  41         char    *Username;
  42         char    Salt[9];
  43
  44          int    UID;
  45          int    EffectiveUID;
  46          int    bIsAuthed;
  47 }       tClient;
  48
  49 // === PROTOTYPES ===
  50 void    Server_Start(void);
  51 void    Server_Cleanup(void);
  52 void    Server_HandleClient(int Socket, int bTrusted);
  53 void    Server_ParseClientCommand(tClient *Client, char *CommandString);
  54 // --- Commands ---
  55 void    Server_Cmd_USER(tClient *Client, char *Args);
  56 void    Server_Cmd_PASS(tClient *Client, char *Args);
  57 void    Server_Cmd_AUTOAUTH(tClient *Client, char *Args);
  58 void    Server_Cmd_SETEUSER(tClient *Client, char *Args);
  59 void    Server_Cmd_ENUMITEMS(tClient *Client, char *Args);
  60 void    Server_Cmd_ITEMINFO(tClient *Client, char *Args);
  61 void    Server_Cmd_DISPENSE(tClient *Client, char *Args);
  62 void    Server_Cmd_GIVE(tClient *Client, char *Args);
  63 void    Server_Cmd_DONATE(tClient *Client, char *Args);
  64 void    Server_Cmd_ADD(tClient *Client, char *Args);
  65 void    Server_Cmd_SET(tClient *Client, char *Args);
  66 void    Server_Cmd_ENUMUSERS(tClient *Client, char *Args);
  67 void    Server_Cmd_USERINFO(tClient *Client, char *Args);
  68 void    _SendUserInfo(tClient *Client, int UserID);
  69 void    Server_Cmd_USERADD(tClient *Client, char *Args);
  70 void    Server_Cmd_USERFLAGS(tClient *Client, char *Args);
  71 // --- Helpers ---
  72 void    Debug(tClient *Client, const char *Format, ...);
  73  int    sendf(int Socket, const char *Format, ...);
  74  int    Server_int_ParseArgs(int bUseLongArg, char *ArgStr, ...);
  75  int    Server_int_ParseFlags(tClient *Client, const char *Str, int *Mask, int *Value);
  76
  77 // === CONSTANTS ===
  78 // - Commands
  79 const struct sClientCommand {
  80         const char      *Name;
  81         void    (*Function)(tClient *Client, char *Arguments);
  82 }       gaServer_Commands[] = {
  83         {"USER", Server_Cmd_USER},
  84         {"PASS", Server_Cmd_PASS},
  85         {"AUTOAUTH", Server_Cmd_AUTOAUTH},
  86         {"SETEUSER", Server_Cmd_SETEUSER},
  87         {"ENUM_ITEMS", Server_Cmd_ENUMITEMS},
  88         {"ITEM_INFO", Server_Cmd_ITEMINFO},
  89         {"DISPENSE", Server_Cmd_DISPENSE},
  90         {"GIVE", Server_Cmd_GIVE},
  91         {"DONATE", Server_Cmd_DONATE},
  92         {"ADD", Server_Cmd_ADD},
  93         {"SET", Server_Cmd_SET},
  94         {"ENUM_USERS", Server_Cmd_ENUMUSERS},
  95         {"USER_INFO", Server_Cmd_USERINFO},
  96         {"USER_ADD", Server_Cmd_USERADD},
  97         {"USER_FLAGS", Server_Cmd_USERFLAGS}
  98 };
  99 #define NUM_COMMANDS    ((int)(sizeof(gaServer_Commands)/sizeof(gaServer_Commands[0])))
 100
 101 // === GLOBALS ===
 102  int    giServer_Port = 11020;
 103  int    giServer_NextClientID = 1;
 104  int    giServer_Socket;
 105
 106 // === CODE ===
 107 /**
 108  * \brief Open listenting socket and serve connections
 109  */
 110 void Server_Start(void)
 111 {
 112          int    client_socket;
 113         struct sockaddr_in      server_addr, client_addr;
 114
 115         atexit(Server_Cleanup);
 116
 117         // Create Server
 118         giServer_Socket = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 119         if( giServer_Socket < 0 ) {
 120                 fprintf(stderr, "ERROR: Unable to create server socket\n");
 121                 return ;
 122         }
 123
 124         // Make listen address
 125         memset(&server_addr, 0, sizeof(server_addr));
 126         server_addr.sin_family = AF_INET;       // Internet Socket
 127         server_addr.sin_addr.s_addr = htonl(INADDR_ANY);        // Listen on all interfaces
 128         server_addr.sin_port = htons(giServer_Port);    // Port
 129
 130         // Bind
 131         if( bind(giServer_Socket, (struct sockaddr *) &server_addr, sizeof(server_addr)) < 0 ) {
 132                 fprintf(stderr, "ERROR: Unable to bind to 0.0.0.0:%i\n", giServer_Port);
 133                 perror("Binding");
 134                 return ;
 135         }
 136
 137         // Listen
 138         if( listen(giServer_Socket, MAX_CONNECTION_QUEUE) < 0 ) {
 139                 fprintf(stderr, "ERROR: Unable to listen to socket\n");
 140                 perror("Listen");
 141                 return ;
 142         }
 143
 144         printf("Listening on 0.0.0.0:%i\n", giServer_Port);
 145
 146         // write pidfile
 147 //      {
 148 //              FILE *fp = fopen("/var/run/dispsrv.pid", "w");
 149 //              fprintf(fp, "%i", getpid());
 150 //              fclose(fp);
 151 //      }
 152
 153         for(;;)
 154         {
 155                 uint    len = sizeof(client_addr);
 156                  int    bTrusted = 0;
 157
 158                 // Accept a connection
 159                 client_socket = accept(giServer_Socket, (struct sockaddr *) &client_addr, &len);
 160                 if(client_socket < 0) {
 161                         fprintf(stderr, "ERROR: Unable to accept client connection\n");
 162                         return ;
 163                 }
 164
 165                 // Set a timeout on the user conneciton
 166                 {
 167                         struct timeval tv;
 168                         tv.tv_sec = CLIENT_TIMEOUT;
 169                         tv.tv_usec = 0;
 170                         if( setsockopt(client_socket, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) )
 171                         {
 172                                 perror("setsockopt");
 173                                 return ;
 174                         }
 175                 }
 176
 177                 // Debug: Print the connection string
 178                 if(giDebugLevel >= 2) {
 179                         char    ipstr[INET_ADDRSTRLEN];
 180                         inet_ntop(AF_INET, &client_addr.sin_addr, ipstr, INET_ADDRSTRLEN);
 181                         printf("Client connection from %s:%i\n",
 182                                 ipstr, ntohs(client_addr.sin_port));
 183                 }
 184
 185                 // Doesn't matter what, localhost is trusted
 186                 if( ntohl( client_addr.sin_addr.s_addr ) == 0x7F000001 )
 187                         bTrusted = 1;
 188
 189                 // Trusted Connections
 190                 if( ntohs(client_addr.sin_port) < 1024 )
 191                 {
 192                         // TODO: Make this runtime configurable
 193                         switch( ntohl( client_addr.sin_addr.s_addr ) )
 194                         {
 195                         case 0x7F000001:        // 127.0.0.1    localhost
 196                 //      case 0x825F0D00:        // 130.95.13.0
 197                         case 0x825F0D07:        // 130.95.13.7  motsugo
 198                         case 0x825F0D11:        // 130.95.13.17 mermaid
 199                         case 0x825F0D12:        // 130.95.13.18 mussel
 200                         case 0x825F0D17:        // 130.95.13.23 martello
 201                         case 0x825F0D42:        // 130.95.13.66 heathred
 202                                 bTrusted = 1;
 203                                 break;
 204                         default:
 205                                 break;
 206                         }
 207                 }
 208
 209                 // TODO: Multithread this?
 210                 Server_HandleClient(client_socket, bTrusted);
 211
 212                 close(client_socket);
 213         }
 214 }
 215
 216 void Server_Cleanup(void)
 217 {
 218         printf("Close(%i)\n", giServer_Socket);
 219         close(giServer_Socket);
 220 }
 221
 222 /**
 223  * \brief Reads from a client socket and parses the command strings
 224  * \param Socket        Client socket number/handle
 225  * \param bTrusted      Is the client trusted?
 226  */
 227 void Server_HandleClient(int Socket, int bTrusted)
 228 {
 229         char    inbuf[INPUT_BUFFER_SIZE];
 230         char    *buf = inbuf;
 231          int    remspace = INPUT_BUFFER_SIZE-1;
 232          int    bytes = -1;
 233         tClient clientInfo;
 234
 235         memset(&clientInfo, 0, sizeof(clientInfo));
 236
 237         // Initialise Client info
 238         clientInfo.Socket = Socket;
 239         clientInfo.ID = giServer_NextClientID ++;
 240         clientInfo.bIsTrusted = bTrusted;
 241         clientInfo.EffectiveUID = -1;
 242
 243         // Read from client
 244         /*
 245          * Notes:
 246          * - The `buf` and `remspace` variables allow a line to span several
 247          *   calls to recv(), if a line is not completed in one recv() call
 248          *   it is saved to the beginning of `inbuf` and `buf` is updated to
 249          *   the end of it.
 250          */
 251         // TODO: Use select() instead (to give a timeout)
 252         while( (bytes = recv(Socket, buf, remspace, 0)) > 0 )
 253         {
 254                 char    *eol, *start;
 255                 buf[bytes] = '\0';      // Allow us to use stdlib string functions on it
 256
 257                 // Split by lines
 258                 start = inbuf;
 259                 while( (eol = strchr(start, '\n')) )
 260                 {
 261                         *eol = '\0';
 262
 263                         Server_ParseClientCommand(&clientInfo, start);
 264
 265                         start = eol + 1;
 266                 }
 267
 268                 // Check if there was an incomplete line
 269                 if( *start != '\0' ) {
 270                          int    tailBytes = bytes - (start-buf);
 271                         // Roll back in buffer
 272                         memcpy(inbuf, start, tailBytes);
 273                         remspace -= tailBytes;
 274                         if(remspace == 0) {
 275                                 send(Socket, MSG_STR_TOO_LONG, sizeof(MSG_STR_TOO_LONG), 0);
 276                                 buf = inbuf;
 277                                 remspace = INPUT_BUFFER_SIZE - 1;
 278                         }
 279                 }
 280                 else {
 281                         buf = inbuf;
 282                         remspace = INPUT_BUFFER_SIZE - 1;
 283                 }
 284         }
 285
 286         // Check for errors
 287         if( bytes < 0 ) {
 288                 fprintf(stderr, "ERROR: Unable to recieve from client on socket %i\n", Socket);
 289                 return ;
 290         }
 291
 292         if(giDebugLevel >= 2) {
 293                 printf("Client %i: Disconnected\n", clientInfo.ID);
 294         }
 295 }
 296
 297 /**
 298  * \brief Parses a client command and calls the required helper function
 299  * \param Client        Pointer to client state structure
 300  * \param CommandString Command from client (single line of the command)
 301  * \return Heap String to return to the client
 302  */
 303 void Server_ParseClientCommand(tClient *Client, char *CommandString)
 304 {
 305         char    *command, *args;
 306          int    i;
 307
 308         if( giDebugLevel >= 2 )
 309                 Debug(Client, "Server_ParseClientCommand: (CommandString = '%s')", CommandString);
 310
 311         if( Server_int_ParseArgs(1, CommandString, &command, &args, NULL) )
 312         {
 313 //              printf("command=%s, args=%s\n", command, args);
 314                 // Is this an error? (just ignore for now)
 315                 //args = "";
 316         }
 317
 318
 319         // Find command
 320         for( i = 0; i < NUM_COMMANDS; i++ )
 321         {
 322                 if(strcmp(command, gaServer_Commands[i].Name) == 0) {
 323                         if( giDebugLevel >= 2 )
 324                                 Debug(Client, "CMD %s - \"%s\"", command, args);
 325                         gaServer_Commands[i].Function(Client, args);
 326                         return ;
 327                 }
 328         }
 329
 330         sendf(Client->Socket, "400 Unknown Command\n");
 331 }
 332
 333 // ---
 334 // Commands
 335 // ---
 336 /**
 337  * \brief Set client username
 338  *
 339  * Usage: USER <username>
 340  */
 341 void Server_Cmd_USER(tClient *Client, char *Args)
 342 {
 343         char    *username;
 344
 345         if( Server_int_ParseArgs(0, Args, &username, NULL) )
 346         {
 347                 sendf(Client->Socket, "407 USER takes 1 argument\n");
 348                 return ;
 349         }
 350
 351         // Debug!
 352         if( giDebugLevel )
 353                 Debug(Client, "Authenticating as '%s'", username);
 354
 355         // Save username
 356         if(Client->Username)
 357                 free(Client->Username);
 358         Client->Username = strdup(username);
 359
 360         #if USE_SALT
 361         // Create a salt (that changes if the username is changed)
 362         // Yes, I know, I'm a little paranoid, but who isn't?
 363         Client->Salt[0] = 0x21 + (rand()&0x3F);
 364         Client->Salt[1] = 0x21 + (rand()&0x3F);
 365         Client->Salt[2] = 0x21 + (rand()&0x3F);
 366         Client->Salt[3] = 0x21 + (rand()&0x3F);
 367         Client->Salt[4] = 0x21 + (rand()&0x3F);
 368         Client->Salt[5] = 0x21 + (rand()&0x3F);
 369         Client->Salt[6] = 0x21 + (rand()&0x3F);
 370         Client->Salt[7] = 0x21 + (rand()&0x3F);
 371
 372         // TODO: Also send hash type to use, (SHA1 or crypt according to [DAA])
 373         sendf(Client->Socket, "100 SALT %s\n", Client->Salt);
 374         #else
 375         sendf(Client->Socket, "100 User Set\n");
 376         #endif
 377 }
 378
 379 /**
 380  * \brief Authenticate as a user
 381  *
 382  * Usage: PASS <hash>
 383  */
 384 void Server_Cmd_PASS(tClient *Client, char *Args)
 385 {
 386         char    *passhash;
 387          int    flags;
 388
 389         if( Server_int_ParseArgs(0, Args, &passhash, NULL) )
 390         {
 391                 sendf(Client->Socket, "407 PASS takes 1 argument\n");
 392                 return ;
 393         }
 394
 395         // Pass on to cokebank
 396         Client->UID = Bank_GetUserAuth(Client->Salt, Client->Username, passhash);
 397
 398         if( Client->UID == -1 ) {
 399                 sendf(Client->Socket, "401 Auth Failure\n");
 400                 return ;
 401         }
 402
 403         flags = Bank_GetFlags(Client->UID);
 404         if( flags & USER_FLAG_DISABLED ) {
 405                 Client->UID = -1;
 406                 sendf(Client->Socket, "403 Account Disabled\n");
 407                 return ;
 408         }
 409         if( flags & USER_FLAG_INTERNAL ) {
 410                 Client->UID = -1;
 411                 sendf(Client->Socket, "403 Internal account\n");
 412                 return ;
 413         }
 414
 415         Client->bIsAuthed = 1;
 416         sendf(Client->Socket, "200 Auth OK\n");
 417 }
 418
 419 /**
 420  * \brief Authenticate as a user without a password
 421  *
 422  * Usage: AUTOAUTH <user>
 423  */
 424 void Server_Cmd_AUTOAUTH(tClient *Client, char *Args)
 425 {
 426         char    *username;
 427          int    userflags;
 428
 429         if( Server_int_ParseArgs(0, Args, &username, NULL) )
 430         {
 431                 sendf(Client->Socket, "407 AUTOAUTH takes 1 argument\n");
 432                 return ;
 433         }
 434
 435         // Check if trusted
 436         if( !Client->bIsTrusted ) {
 437                 if(giDebugLevel)
 438                         Debug(Client, "Untrusted client attempting to AUTOAUTH");
 439                 sendf(Client->Socket, "401 Untrusted\n");
 440                 return ;
 441         }
 442
 443         // Get UID
 444         Client->UID = Bank_GetAcctByName( username );
 445         if( Client->UID < 0 ) {
 446                 if(giDebugLevel)
 447                         Debug(Client, "Unknown user '%s'", username);
 448                 sendf(Client->Socket, "403 Auth Failure\n");
 449                 return ;
 450         }
 451
 452         userflags = Bank_GetFlags(Client->UID);
 453         // You can't be an internal account
 454         if( userflags & USER_FLAG_INTERNAL ) {
 455                 if(giDebugLevel)
 456                         Debug(Client, "Autoauth as '%s', not allowed", username);
 457                 Client->UID = -1;
 458                 sendf(Client->Socket, "403 Account is internal\n");
 459                 return ;
 460         }
 461
 462         // Disabled accounts
 463         if( userflags & USER_FLAG_DISABLED ) {
 464                 Client->UID = -1;
 465                 sendf(Client->Socket, "403 Account disabled\n");
 466                 return ;
 467         }
 468
 469         Client->bIsAuthed = 1;
 470
 471         if(giDebugLevel)
 472                 Debug(Client, "Auto authenticated as '%s' (%i)", username, Client->UID);
 473
 474         sendf(Client->Socket, "200 Auth OK\n");
 475 }
 476
 477 /**
 478  * \brief Set effective user
 479  */
 480 void Server_Cmd_SETEUSER(tClient *Client, char *Args)
 481 {
 482         char    *username;
 483          int    eUserFlags, userFlags;
 484
 485         if( Server_int_ParseArgs(0, Args, &username, NULL) )
 486         {
 487                 sendf(Client->Socket, "407 SETEUSER takes 1 argument\n");
 488                 return ;
 489         }
 490
 491         if( !strlen(Args) ) {
 492                 sendf(Client->Socket, "407 SETEUSER expects an argument\n");
 493                 return ;
 494         }
 495
 496         // Check user permissions
 497         userFlags = Bank_GetFlags(Client->UID);
 498         if( !(userFlags & (USER_FLAG_COKE|USER_FLAG_ADMIN)) ) {
 499                 sendf(Client->Socket, "403 Not in coke\n");
 500                 return ;
 501         }
 502
 503         // Set id
 504         Client->EffectiveUID = Bank_GetAcctByName(username);
 505         if( Client->EffectiveUID == -1 ) {
 506                 sendf(Client->Socket, "404 User not found\n");
 507                 return ;
 508         }
 509
 510         // You can't be an internal account
 511         eUserFlags = Bank_GetFlags(Client->EffectiveUID);
 512         if( eUserFlags & USER_FLAG_INTERNAL ) {
 513                 Client->EffectiveUID = -1;
 514                 sendf(Client->Socket, "404 User not found\n");
 515                 return ;
 516         }
 517         // Disabled only avaliable to admins
 518         if( (eUserFlags & USER_FLAG_DISABLED) && !(userFlags & USER_FLAG_ADMIN) ) {
 519                 Client->EffectiveUID = -1;
 520                 sendf(Client->Socket, "403 Account disabled\n");
 521                 return ;
 522         }
 523
 524         sendf(Client->Socket, "200 User set\n");
 525 }
 526
 527 /**
 528  * \brief Send an item status to the client
 529  * \param Client        Who to?
 530  * \param Item  Item to send
 531  */
 532 void Server_int_SendItem(tClient *Client, tItem *Item)
 533 {
 534         char    *status = "avail";
 535
 536         if( Item->Handler->CanDispense )
 537         {
 538                 switch(Item->Handler->CanDispense(Client->UID, Item->ID))
 539                 {
 540                 case  0:        status = "avail";       break;
 541                 case  1:        status = "sold";        break;
 542                 default:
 543                 case -1:        status = "error";       break;
 544                 }
 545         }
 546
 547         sendf(Client->Socket,
 548                 "202 Item %s:%i %s %i %s\n",
 549                 Item->Handler->Name, Item->ID, status, Item->Price, Item->Name
 550                 );
 551 }
 552
 553 /**
 554  * \brief Enumerate the items that the server knows about
 555  */
 556 void Server_Cmd_ENUMITEMS(tClient *Client, char *Args)
 557 {
 558          int    i, count;
 559
 560         if( Args != NULL && strlen(Args) ) {
 561                 sendf(Client->Socket, "407 ENUM_ITEMS takes no arguments\n");
 562                 return ;
 563         }
 564
 565         // Count shown items
 566         count = 0;
 567         for( i = 0; i < giNumItems; i ++ ) {
 568                 if( gaItems[i].bHidden )        continue;
 569                 count ++;
 570         }
 571
 572         sendf(Client->Socket, "201 Items %i\n", count);
 573
 574         for( i = 0; i < giNumItems; i ++ ) {
 575                 if( gaItems[i].bHidden )        continue;
 576                 Server_int_SendItem( Client, &gaItems[i] );
 577         }
 578
 579         sendf(Client->Socket, "200 List end\n");
 580 }
 581
 582 tItem *_GetItemFromString(char *String)
 583 {
 584         tHandler        *handler;
 585         char    *type = String;
 586         char    *colon = strchr(String, ':');
 587          int    num, i;
 588
 589         if( !colon ) {
 590                 return NULL;
 591         }
 592
 593         num = atoi(colon+1);
 594         *colon = '\0';
 595
 596         // Find handler
 597         handler = NULL;
 598         for( i = 0; i < giNumHandlers; i ++ )
 599         {
 600                 if( strcmp(gaHandlers[i]->Name, type) == 0) {
 601                         handler = gaHandlers[i];
 602                         break;
 603                 }
 604         }
 605         if( !handler ) {
 606                 return NULL;
 607         }
 608
 609         // Find item
 610         for( i = 0; i < giNumItems; i ++ )
 611         {
 612                 if( gaItems[i].Handler != handler )     continue;
 613                 if( gaItems[i].ID != num )      continue;
 614                 return &gaItems[i];
 615         }
 616         return NULL;
 617 }
 618
 619 /**
 620  * \brief Fetch information on a specific item
 621  */
 622 void Server_Cmd_ITEMINFO(tClient *Client, char *Args)
 623 {
 624         tItem   *item;
 625         char    *itemname;
 626
 627         if( Server_int_ParseArgs(0, Args, &itemname, NULL) ) {
 628                 sendf(Client->Socket, "407 ITEMINFO takes 1 argument\n");
 629                 return ;
 630         }
 631         item = _GetItemFromString(Args);
 632
 633         if( !item ) {
 634                 sendf(Client->Socket, "406 Bad Item ID\n");
 635                 return ;
 636         }
 637
 638         Server_int_SendItem( Client, item );
 639 }
 640
 641 void Server_Cmd_DISPENSE(tClient *Client, char *Args)
 642 {
 643         tItem   *item;
 644          int    ret;
 645          int    uid;
 646         char    *itemname;
 647
 648         if( Server_int_ParseArgs(0, Args, &itemname, NULL) ) {
 649                 sendf(Client->Socket, "407 DISPENSE takes only 1 argument\n");
 650                 return ;
 651         }
 652
 653         if( !Client->bIsAuthed ) {
 654                 sendf(Client->Socket, "401 Not Authenticated\n");
 655                 return ;
 656         }
 657
 658         item = _GetItemFromString(itemname);
 659         if( !item ) {
 660                 sendf(Client->Socket, "406 Bad Item ID\n");
 661                 return ;
 662         }
 663
 664         if( Client->EffectiveUID != -1 ) {
 665                 uid = Client->EffectiveUID;
 666         }
 667         else {
 668                 uid = Client->UID;
 669         }
 670
 671         switch( ret = DispenseItem( Client->UID, uid, item ) )
 672         {
 673         case 0: sendf(Client->Socket, "200 Dispense OK\n");     return ;
 674         case 1: sendf(Client->Socket, "501 Unable to dispense\n");      return ;
 675         case 2: sendf(Client->Socket, "402 Poor You\n");        return ;
 676         default:
 677                 sendf(Client->Socket, "500 Dispense Error\n");
 678                 return ;
 679         }
 680 }
 681
 682 void Server_Cmd_GIVE(tClient *Client, char *Args)
 683 {
 684         char    *recipient, *ammount, *reason;
 685          int    uid, iAmmount;
 686          int    thisUid;
 687
 688         // Parse arguments
 689         if( Server_int_ParseArgs(1, Args, &recipient, &ammount, &reason, NULL) ) {
 690                 sendf(Client->Socket, "407 GIVE takes only 3 arguments\n");
 691                 return ;
 692         }
 693         // Check for authed
 694         if( !Client->bIsAuthed ) {
 695                 sendf(Client->Socket, "401 Not Authenticated\n");
 696                 return ;
 697         }
 698
 699         // Get recipient
 700         uid = Bank_GetAcctByName(recipient);
 701         if( uid == -1 ) {
 702                 sendf(Client->Socket, "404 Invalid target user\n");
 703                 return ;
 704         }
 705
 706         // You can't alter an internal account
 707 //      if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 708 //              sendf(Client->Socket, "404 Invalid target user\n");
 709 //              return ;
 710 //      }
 711
 712         // Parse ammount
 713         iAmmount = atoi(ammount);
 714         if( iAmmount <= 0 ) {
 715                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 716                 return ;
 717         }
 718
 719         if( Client->EffectiveUID != -1 ) {
 720                 thisUid = Client->EffectiveUID;
 721         }
 722         else {
 723                 thisUid = Client->UID;
 724         }
 725
 726         // Do give
 727         switch( DispenseGive(Client->UID, thisUid, uid, iAmmount, reason) )
 728         {
 729         case 0:
 730                 sendf(Client->Socket, "200 Give OK\n");
 731                 return ;
 732         case 2:
 733                 sendf(Client->Socket, "402 Poor You\n");
 734                 return ;
 735         default:
 736                 sendf(Client->Socket, "500 Unknown error\n");
 737                 return ;
 738         }
 739 }
 740
 741 void Server_Cmd_DONATE(tClient *Client, char *Args)
 742 {
 743         char    *ammount, *reason;
 744          int    iAmmount;
 745          int    thisUid;
 746
 747         // Parse arguments
 748         if( Server_int_ParseArgs(1, Args, &ammount, &reason, NULL) ) {
 749                 sendf(Client->Socket, "407 DONATE takes 2 arguments\n");
 750                 return ;
 751         }
 752
 753         if( !Client->bIsAuthed ) {
 754                 sendf(Client->Socket, "401 Not Authenticated\n");
 755                 return ;
 756         }
 757
 758         // Parse ammount
 759         iAmmount = atoi(ammount);
 760         if( iAmmount <= 0 ) {
 761                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 762                 return ;
 763         }
 764
 765         // Handle effective users
 766         if( Client->EffectiveUID != -1 ) {
 767                 thisUid = Client->EffectiveUID;
 768         }
 769         else {
 770                 thisUid = Client->UID;
 771         }
 772
 773         // Do give
 774         switch( DispenseDonate(Client->UID, thisUid, iAmmount, reason) )
 775         {
 776         case 0:
 777                 sendf(Client->Socket, "200 Give OK\n");
 778                 return ;
 779         case 2:
 780                 sendf(Client->Socket, "402 Poor You\n");
 781                 return ;
 782         default:
 783                 sendf(Client->Socket, "500 Unknown error\n");
 784                 return ;
 785         }
 786 }
 787
 788 void Server_Cmd_ADD(tClient *Client, char *Args)
 789 {
 790         char    *user, *ammount, *reason;
 791          int    uid, iAmmount;
 792
 793         // Parse arguments
 794         if( Server_int_ParseArgs(1, Args, &user, &ammount, &reason, NULL) ) {
 795                 sendf(Client->Socket, "407 ADD takes 3 arguments\n");
 796                 return ;
 797         }
 798
 799         if( !Client->bIsAuthed ) {
 800                 sendf(Client->Socket, "401 Not Authenticated\n");
 801                 return ;
 802         }
 803
 804         // Check user permissions
 805         if( !(Bank_GetFlags(Client->UID) & (USER_FLAG_COKE|USER_FLAG_ADMIN))  ) {
 806                 sendf(Client->Socket, "403 Not in coke\n");
 807                 return ;
 808         }
 809
 810         // Get recipient
 811         uid = Bank_GetAcctByName(user);
 812         if( uid == -1 ) {
 813                 sendf(Client->Socket, "404 Invalid user\n");
 814                 return ;
 815         }
 816
 817         // You can't alter an internal account
 818         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 819                 sendf(Client->Socket, "404 Invalid user\n");
 820                 return ;
 821         }
 822
 823         // Parse ammount
 824         iAmmount = atoi(ammount);
 825         if( iAmmount == 0 && ammount[0] != '0' ) {
 826                 sendf(Client->Socket, "407 Invalid Argument\n");
 827                 return ;
 828         }
 829
 830         // Do give
 831         switch( DispenseAdd(Client->UID, uid, iAmmount, reason) )
 832         {
 833         case 0:
 834                 sendf(Client->Socket, "200 Add OK\n");
 835                 return ;
 836         case 2:
 837                 sendf(Client->Socket, "402 Poor Guy\n");
 838                 return ;
 839         default:
 840                 sendf(Client->Socket, "500 Unknown error\n");
 841                 return ;
 842         }
 843 }
 844
 845 void Server_Cmd_SET(tClient *Client, char *Args)
 846 {
 847         char    *user, *ammount, *reason;
 848          int    uid, iAmmount;
 849
 850         // Parse arguments
 851         if( Server_int_ParseArgs(1, Args, &user, &ammount, &reason, NULL) ) {
 852                 sendf(Client->Socket, "407 SET takes 3 arguments\n");
 853                 return ;
 854         }
 855
 856         if( !Client->bIsAuthed ) {
 857                 sendf(Client->Socket, "401 Not Authenticated\n");
 858                 return ;
 859         }
 860
 861         // Check user permissions
 862         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN)  ) {
 863                 sendf(Client->Socket, "403 Not an admin\n");
 864                 return ;
 865         }
 866
 867         // Get recipient
 868         uid = Bank_GetAcctByName(user);
 869         if( uid == -1 ) {
 870                 sendf(Client->Socket, "404 Invalid user\n");
 871                 return ;
 872         }
 873
 874         // You can't alter an internal account
 875         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 876                 sendf(Client->Socket, "404 Invalid user\n");
 877                 return ;
 878         }
 879
 880         // Parse ammount
 881         iAmmount = atoi(ammount);
 882         if( iAmmount == 0 && ammount[0] != '0' ) {
 883                 sendf(Client->Socket, "407 Invalid Argument\n");
 884                 return ;
 885         }
 886
 887         // Do give
 888         switch( DispenseSet(Client->UID, uid, iAmmount, reason) )
 889         {
 890         case 0:
 891                 sendf(Client->Socket, "200 Add OK\n");
 892                 return ;
 893         case 2:
 894                 sendf(Client->Socket, "402 Poor Guy\n");
 895                 return ;
 896         default:
 897                 sendf(Client->Socket, "500 Unknown error\n");
 898                 return ;
 899         }
 900 }
 901
 902 void Server_Cmd_ENUMUSERS(tClient *Client, char *Args)
 903 {
 904          int    i, numRet = 0;
 905         tAcctIterator   *it;
 906          int    maxBal = INT_MAX, minBal = INT_MIN;
 907          int    flagMask = 0, flagVal = 0;
 908          int    sort = BANK_ITFLAG_SORT_NAME;
 909         time_t  lastSeenAfter=0, lastSeenBefore=0;
 910
 911          int    flags;  // Iterator flags
 912          int    balValue;       // Balance value for iterator
 913         time_t  timeValue;      // Time value for iterator
 914
 915         // Parse arguments
 916         if( Args && strlen(Args) )
 917         {
 918                 char    *space = Args, *type, *val;
 919                 do
 920                 {
 921                         type = space;
 922                         while(*type == ' ')     type ++;
 923                         // Get next space
 924                         space = strchr(space, ' ');
 925                         if(space)       *space = '\0';
 926
 927                         // Get type
 928                         val = strchr(type, ':');
 929                         if( val ) {
 930                                 *val = '\0';
 931                                 val ++;
 932
 933                                 // Types
 934                                 // - Minium Balance
 935                                 if( strcmp(type, "min_balance") == 0 ) {
 936                                         minBal = atoi(val);
 937                                 }
 938                                 // - Maximum Balance
 939                                 else if( strcmp(type, "max_balance") == 0 ) {
 940                                         maxBal = atoi(val);
 941                                 }
 942                                 // - Flags
 943                                 else if( strcmp(type, "flags") == 0 ) {
 944                                         if( Server_int_ParseFlags(Client, val, &flagMask, &flagVal) )
 945                                                 return ;
 946                                 }
 947                                 // - Last seen before timestamp
 948                                 else if( strcmp(type, "last_seen_before") == 0 ) {
 949                                         lastSeenAfter = atoll(val);
 950                                 }
 951                                 // - Last seen after timestamp
 952                                 else if( strcmp(type, "last_seen_after") == 0 ) {
 953                                         lastSeenAfter = atoll(val);
 954                                 }
 955                                 // - Sorting
 956                                 else if( strcmp(type, "sort") == 0 ) {
 957                                         char    *dash = strchr(val, '-');
 958                                         if( dash ) {
 959                                                 *dash = '\0';
 960                                                 dash ++;
 961                                         }
 962                                         if( strcmp(val, "name") == 0 ) {
 963                                                 sort = BANK_ITFLAG_SORT_NAME;
 964                                         }
 965                                         else if( strcmp(val, "balance") == 0 ) {
 966                                                 sort = BANK_ITFLAG_SORT_BAL;
 967                                         }
 968                                         else if( strcmp(val, "lastseen") == 0 ) {
 969                                                 sort = BANK_ITFLAG_SORT_LASTSEEN;
 970                                         }
 971                                         else {
 972                                                 sendf(Client->Socket, "407 Unknown sort field ('%s')\n", val);
 973                                                 return ;
 974                                         }
 975                                         // Handle sort direction
 976                                         if( dash ) {
 977                                                 if( strcmp(dash, "desc") == 0 ) {
 978                                                         sort |= BANK_ITFLAG_REVSORT;
 979                                                 }
 980                                                 else {
 981                                                         sendf(Client->Socket, "407 Unknown sort direction '%s'\n", dash);
 982                                                         return ;
 983                                                 }
 984                                                 dash[-1] = '-';
 985                                         }
 986                                 }
 987                                 else {
 988                                         sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s:%s'\n", type, val);
 989                                         return ;
 990                                 }
 991
 992                                 val[-1] = ':';
 993                         }
 994                         else {
 995                                 sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s'\n", type);
 996                                 return ;
 997                         }
 998
 999                         // Eat whitespace
1000                         if( space ) {
1001                                 *space = ' ';   // Repair (to be nice)
1002                                 space ++;
1003                                 while(*space == ' ')    space ++;
1004                         }
1005                 }       while(space);
1006         }
1007
1008         // Create iterator
1009         if( maxBal != INT_MAX ) {
1010                 flags = sort|BANK_ITFLAG_MAXBALANCE;
1011                 balValue = maxBal;
1012         }
1013         else if( minBal != INT_MIN ) {
1014                 flags = sort|BANK_ITFLAG_MINBALANCE;
1015                 balValue = minBal;
1016         }
1017         else {
1018                 flags = sort;
1019                 balValue = 0;
1020         }
1021         if( lastSeenBefore ) {
1022                 timeValue = lastSeenBefore;
1023                 flags |= BANK_ITFLAG_SEENBEFORE;
1024         }
1025         else if( lastSeenAfter ) {
1026                 timeValue = lastSeenAfter;
1027                 flags |= BANK_ITFLAG_SEENAFTER;
1028         }
1029         else {
1030                 timeValue = 0;
1031         }
1032         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
1033
1034         // Get return number
1035         while( (i = Bank_IteratorNext(it)) != -1 )
1036         {
1037                 int bal = Bank_GetBalance(i);
1038
1039                 if( bal == INT_MIN )    continue;
1040
1041                 if( bal < minBal )      continue;
1042                 if( bal > maxBal )      continue;
1043
1044                 numRet ++;
1045         }
1046
1047         Bank_DelIterator(it);
1048
1049         // Send count
1050         sendf(Client->Socket, "201 Users %i\n", numRet);
1051
1052
1053         // Create iterator
1054         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
1055
1056         while( (i = Bank_IteratorNext(it)) != -1 )
1057         {
1058                 int bal = Bank_GetBalance(i);
1059
1060                 if( bal == INT_MIN )    continue;
1061
1062                 if( bal < minBal )      continue;
1063                 if( bal > maxBal )      continue;
1064
1065                 _SendUserInfo(Client, i);
1066         }
1067
1068         Bank_DelIterator(it);
1069
1070         sendf(Client->Socket, "200 List End\n");
1071 }
1072
1073 void Server_Cmd_USERINFO(tClient *Client, char *Args)
1074 {
1075          int    uid;
1076         char    *user;
1077
1078         // Parse arguments
1079         if( Server_int_ParseArgs(0, Args, &user, NULL) ) {
1080                 sendf(Client->Socket, "407 USER_INFO takes 1 argument\n");
1081                 return ;
1082         }
1083
1084         if( giDebugLevel )      Debug(Client, "User Info '%s'", user);
1085
1086         // Get recipient
1087         uid = Bank_GetAcctByName(user);
1088
1089         if( giDebugLevel >= 2 ) Debug(Client, "uid = %i", uid);
1090         if( uid == -1 ) {
1091                 sendf(Client->Socket, "404 Invalid user\n");
1092                 return ;
1093         }
1094
1095         _SendUserInfo(Client, uid);
1096 }
1097
1098 void _SendUserInfo(tClient *Client, int UserID)
1099 {
1100         char    *type, *disabled="", *door="";
1101          int    flags = Bank_GetFlags(UserID);
1102
1103         if( flags & USER_FLAG_INTERNAL ) {
1104                 type = "internal";
1105         }
1106         else if( flags & USER_FLAG_COKE ) {
1107                 if( flags & USER_FLAG_ADMIN )
1108                         type = "coke,admin";
1109                 else
1110                         type = "coke";
1111         }
1112         else if( flags & USER_FLAG_ADMIN ) {
1113                 type = "admin";
1114         }
1115         else {
1116                 type = "user";
1117         }
1118
1119         if( flags & USER_FLAG_DISABLED )
1120                 disabled = ",disabled";
1121         if( flags & USER_FLAG_DOORGROUP )
1122                 door = ",door";
1123
1124         // TODO: User flags/type
1125         sendf(
1126                 Client->Socket, "202 User %s %i %s%s%s\n",
1127                 Bank_GetAcctName(UserID), Bank_GetBalance(UserID),
1128                 type, disabled, door
1129                 );
1130 }
1131
1132 void Server_Cmd_USERADD(tClient *Client, char *Args)
1133 {
1134         char    *username;
1135
1136         // Parse arguments
1137         if( Server_int_ParseArgs(0, Args, &username, NULL) ) {
1138                 sendf(Client->Socket, "407 USER_ADD takes 1 argument\n");
1139                 return ;
1140         }
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         // Try to create user
1149         if( Bank_CreateAcct(username) == -1 ) {
1150                 sendf(Client->Socket, "404 User exists\n");
1151                 return ;
1152         }
1153
1154         {
1155                 char    *thisName = Bank_GetAcctName(Client->UID);
1156                 Log_Info("Account '%s' created by '%s'", username, thisName);
1157                 free(thisName);
1158         }
1159
1160         sendf(Client->Socket, "200 User Added\n");
1161 }
1162
1163 void Server_Cmd_USERFLAGS(tClient *Client, char *Args)
1164 {
1165         char    *username, *flags;
1166          int    mask=0, value=0;
1167          int    uid;
1168
1169         // Parse arguments
1170         if( Server_int_ParseArgs(0, Args, &username, &flags, NULL) ) {
1171                 sendf(Client->Socket, "407 USER_FLAGS takes 2 arguments\n");
1172                 return ;
1173         }
1174
1175         // Check permissions
1176         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1177                 sendf(Client->Socket, "403 Not a coke admin\n");
1178                 return ;
1179         }
1180
1181         // Get UID
1182         uid = Bank_GetAcctByName(username);
1183         if( uid == -1 ) {
1184                 sendf(Client->Socket, "404 User '%s' not found\n", username);
1185                 return ;
1186         }
1187
1188         // Parse flags
1189         if( Server_int_ParseFlags(Client, flags, &mask, &value) )
1190                 return ;
1191
1192         if( giDebugLevel )
1193                 Debug(Client, "Set %i(%s) flags to %x (masked %x)\n",
1194                         uid, username, mask, value);
1195
1196         // Apply flags
1197         Bank_SetFlags(uid, mask, value);
1198
1199         // Return OK
1200         sendf(Client->Socket, "200 User Updated\n");
1201 }
1202
1203 // --- INTERNAL HELPERS ---
1204 void Debug(tClient *Client, const char *Format, ...)
1205 {
1206         va_list args;
1207         //printf("%010i [%i] ", (int)time(NULL), Client->ID);
1208         printf("[%i] ", Client->ID);
1209         va_start(args, Format);
1210         vprintf(Format, args);
1211         va_end(args);
1212         printf("\n");
1213 }
1214
1215 int sendf(int Socket, const char *Format, ...)
1216 {
1217         va_list args;
1218          int    len;
1219
1220         va_start(args, Format);
1221         len = vsnprintf(NULL, 0, Format, args);
1222         va_end(args);
1223
1224         {
1225                 char    buf[len+1];
1226                 va_start(args, Format);
1227                 vsnprintf(buf, len+1, Format, args);
1228                 va_end(args);
1229
1230                 #if DEBUG_TRACE_CLIENT
1231                 printf("sendf: %s", buf);
1232                 #endif
1233
1234                 return send(Socket, buf, len, 0);
1235         }
1236 }
1237
1238 // Takes a series of char *'s in
1239 /**
1240  * \brief Parse space-separated entries into
1241  */
1242 int Server_int_ParseArgs(int bUseLongLast, char *ArgStr, ...)
1243 {
1244         va_list args;
1245         char    savedChar;
1246         char    **dest;
1247         va_start(args, ArgStr);
1248
1249         // Check for null
1250         if( !ArgStr )
1251         {
1252                 while( (dest = va_arg(args, char **)) )
1253                         *dest = NULL;
1254                 va_end(args);
1255                 return 1;
1256         }
1257
1258         savedChar = *ArgStr;
1259
1260         while( (dest = va_arg(args, char **)) )
1261         {
1262                 // Trim leading spaces
1263                 while( *ArgStr == ' ' || *ArgStr == '\t' )
1264                         ArgStr ++;
1265
1266                 // ... oops, not enough arguments
1267                 if( *ArgStr == '\0' )
1268                 {
1269                         // NULL unset arguments
1270                         do {
1271                                 *dest = NULL;
1272                         }       while( (dest = va_arg(args, char **)) );
1273                 va_end(args);
1274                         return -1;
1275                 }
1276
1277                 if( *ArgStr == '"' )
1278                 {
1279                         ArgStr ++;
1280                         *dest = ArgStr;
1281                         // Read until quote
1282                         while( *ArgStr && *ArgStr != '"' )
1283                                 ArgStr ++;
1284                 }
1285                 else
1286                 {
1287                         // Set destination
1288                         *dest = ArgStr;
1289                         // Read until a space
1290                         while( *ArgStr && *ArgStr != ' ' && *ArgStr != '\t' )
1291                                 ArgStr ++;
1292                 }
1293                 savedChar = *ArgStr;    // savedChar is used to un-mangle the last string
1294                 *ArgStr = '\0';
1295                 ArgStr ++;
1296         }
1297         va_end(args);
1298
1299         // Oops, extra arguments, and greedy not set
1300         if( (savedChar == ' ' || savedChar == '\t') && !bUseLongLast ) {
1301                 return -1;
1302         }
1303
1304         // Un-mangle last
1305         if(bUseLongLast) {
1306                 ArgStr --;
1307                 *ArgStr = savedChar;
1308         }
1309
1310         return 0;       // Success!
1311 }
1312
1313 int Server_int_ParseFlags(tClient *Client, const char *Str, int *Mask, int *Value)
1314 {
1315         struct {
1316                 const char      *Name;
1317                  int    Mask;
1318                  int    Value;
1319         }       cFLAGS[] = {
1320                  {"disabled", USER_FLAG_DISABLED, USER_FLAG_DISABLED}
1321                 ,{"door", USER_FLAG_DOORGROUP, USER_FLAG_DOORGROUP}
1322                 ,{"coke", USER_FLAG_COKE, USER_FLAG_COKE}
1323                 ,{"admin", USER_FLAG_ADMIN, USER_FLAG_ADMIN}
1324                 ,{"internal", USER_FLAG_INTERNAL, USER_FLAG_INTERNAL}
1325         };
1326         const int       ciNumFlags = sizeof(cFLAGS)/sizeof(cFLAGS[0]);
1327
1328         char    *space;
1329
1330         *Mask = 0;
1331         *Value = 0;
1332
1333         do {
1334                  int    bRemove = 0;
1335                  int    i;
1336                  int    len;
1337
1338                 while( *Str == ' ' )    Str ++; // Eat whitespace
1339                 space = strchr(Str, ',');       // Find the end of the flag
1340                 if(space)
1341                         len = space - Str;
1342                 else
1343                         len = strlen(Str);
1344
1345                 // Check for inversion/removal
1346                 if( *Str == '!' || *Str == '-' ) {
1347                         bRemove = 1;
1348                         Str ++;
1349                 }
1350                 else if( *Str == '+' ) {
1351                         Str ++;
1352                 }
1353
1354                 // Check flag values
1355                 for( i = 0; i < ciNumFlags; i ++ )
1356                 {
1357                         if( strncmp(Str, cFLAGS[i].Name, len) == 0 ) {
1358                                 *Mask |= cFLAGS[i].Mask;
1359                                 *Value &= ~cFLAGS[i].Mask;
1360                                 if( !bRemove )
1361                                         *Value |= cFLAGS[i].Value;
1362                                 break;
1363                         }
1364                 }
1365
1366                 // Error check
1367                 if( i == ciNumFlags ) {
1368                         char    val[len+1];
1369                         strncpy(val, Str, len+1);
1370                         sendf(Client->Socket, "407 Unknown flag value '%s'\n", val);
1371                         return -1;
1372                 }
1373
1374                 Str = space + 1;
1375         } while(space);
1376
1377         return 0;
1378 }