src/server/server.c

   1 /*
   2  * OpenDispense 2
   3  * UCC (University [of WA] Computer Club) Electronic Accounting System
   4  *
   5  * server.c - Client Server Code
   6  *
   7  * This file is licenced under the 3-clause BSD Licence. See the file
   8  * COPYING for full details.
   9  */
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include "common.h"
  13 #include <sys/socket.h>
  14 #include <netinet/in.h>
  15 #include <arpa/inet.h>
  16 #include <unistd.h>
  17 #include <string.h>
  18 #include <limits.h>
  19 #include <stdarg.h>
  20
  21 #define DEBUG_TRACE_CLIENT      0
  22
  23 // Statistics
  24 #define MAX_CONNECTION_QUEUE    5
  25 #define INPUT_BUFFER_SIZE       256
  26 #define CLIENT_TIMEOUT  10      // Seconds
  27
  28 #define HASH_TYPE       SHA1
  29 #define HASH_LENGTH     20
  30
  31 #define MSG_STR_TOO_LONG        "499 Command too long (limit "EXPSTR(INPUT_BUFFER_SIZE)")\n"
  32
  33 // === TYPES ===
  34 typedef struct sClient
  35 {
  36          int    Socket; // Client socket ID
  37          int    ID;     // Client ID
  38
  39          int    bIsTrusted;     // Is the connection from a trusted host/port
  40
  41         char    *Username;
  42         char    Salt[9];
  43
  44          int    UID;
  45          int    EffectiveUID;
  46          int    bIsAuthed;
  47 }       tClient;
  48
  49 // === PROTOTYPES ===
  50 void    Server_Start(void);
  51 void    Server_Cleanup(void);
  52 void    Server_HandleClient(int Socket, int bTrusted);
  53 void    Server_ParseClientCommand(tClient *Client, char *CommandString);
  54 // --- Commands ---
  55 void    Server_Cmd_USER(tClient *Client, char *Args);
  56 void    Server_Cmd_PASS(tClient *Client, char *Args);
  57 void    Server_Cmd_AUTOAUTH(tClient *Client, char *Args);
  58 void    Server_Cmd_SETEUSER(tClient *Client, char *Args);
  59 void    Server_Cmd_ENUMITEMS(tClient *Client, char *Args);
  60 void    Server_Cmd_ITEMINFO(tClient *Client, char *Args);
  61 void    Server_Cmd_DISPENSE(tClient *Client, char *Args);
  62 void    Server_Cmd_GIVE(tClient *Client, char *Args);
  63 void    Server_Cmd_DONATE(tClient *Client, char *Args);
  64 void    Server_Cmd_ADD(tClient *Client, char *Args);
  65 void    Server_Cmd_SET(tClient *Client, char *Args);
  66 void    Server_Cmd_ENUMUSERS(tClient *Client, char *Args);
  67 void    Server_Cmd_USERINFO(tClient *Client, char *Args);
  68 void    _SendUserInfo(tClient *Client, int UserID);
  69 void    Server_Cmd_USERADD(tClient *Client, char *Args);
  70 void    Server_Cmd_USERFLAGS(tClient *Client, char *Args);
  71 // --- Helpers ---
  72 void    Debug(tClient *Client, const char *Format, ...);
  73  int    sendf(int Socket, const char *Format, ...);
  74  int    Server_int_ParseArgs(int bUseLongArg, char *ArgStr, ...);
  75  int    Server_int_ParseFlags(tClient *Client, const char *Str, int *Mask, int *Value);
  76
  77 // === CONSTANTS ===
  78 // - Commands
  79 const struct sClientCommand {
  80         const char      *Name;
  81         void    (*Function)(tClient *Client, char *Arguments);
  82 }       gaServer_Commands[] = {
  83         {"USER", Server_Cmd_USER},
  84         {"PASS", Server_Cmd_PASS},
  85         {"AUTOAUTH", Server_Cmd_AUTOAUTH},
  86         {"SETEUSER", Server_Cmd_SETEUSER},
  87         {"ENUM_ITEMS", Server_Cmd_ENUMITEMS},
  88         {"ITEM_INFO", Server_Cmd_ITEMINFO},
  89         {"DISPENSE", Server_Cmd_DISPENSE},
  90         {"GIVE", Server_Cmd_GIVE},
  91         {"DONATE", Server_Cmd_DONATE},
  92         {"ADD", Server_Cmd_ADD},
  93         {"SET", Server_Cmd_SET},
  94         {"ENUM_USERS", Server_Cmd_ENUMUSERS},
  95         {"USER_INFO", Server_Cmd_USERINFO},
  96         {"USER_ADD", Server_Cmd_USERADD},
  97         {"USER_FLAGS", Server_Cmd_USERFLAGS}
  98 };
  99 #define NUM_COMMANDS    ((int)(sizeof(gaServer_Commands)/sizeof(gaServer_Commands[0])))
 100
 101 // === GLOBALS ===
 102  int    giServer_Port = 1020;
 103  int    giServer_NextClientID = 1;
 104  int    giServer_Socket;
 105
 106 // === CODE ===
 107 /**
 108  * \brief Open listenting socket and serve connections
 109  */
 110 void Server_Start(void)
 111 {
 112          int    client_socket;
 113         struct sockaddr_in      server_addr, client_addr;
 114
 115         atexit(Server_Cleanup);
 116
 117         // Create Server
 118         giServer_Socket = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 119         if( giServer_Socket < 0 ) {
 120                 fprintf(stderr, "ERROR: Unable to create server socket\n");
 121                 return ;
 122         }
 123
 124         // Make listen address
 125         memset(&server_addr, 0, sizeof(server_addr));
 126         server_addr.sin_family = AF_INET;       // Internet Socket
 127         server_addr.sin_addr.s_addr = htonl(INADDR_ANY);        // Listen on all interfaces
 128         server_addr.sin_port = htons(giServer_Port);    // Port
 129
 130         // Bind
 131         if( bind(giServer_Socket, (struct sockaddr *) &server_addr, sizeof(server_addr)) < 0 ) {
 132                 fprintf(stderr, "ERROR: Unable to bind to 0.0.0.0:%i\n", giServer_Port);
 133                 perror("Binding");
 134                 return ;
 135         }
 136
 137         // Listen
 138         if( listen(giServer_Socket, MAX_CONNECTION_QUEUE) < 0 ) {
 139                 fprintf(stderr, "ERROR: Unable to listen to socket\n");
 140                 perror("Listen");
 141                 return ;
 142         }
 143
 144         printf("Listening on 0.0.0.0:%i\n", giServer_Port);
 145
 146         for(;;)
 147         {
 148                 uint    len = sizeof(client_addr);
 149                  int    bTrusted = 0;
 150
 151                 // Accept a connection
 152                 client_socket = accept(giServer_Socket, (struct sockaddr *) &client_addr, &len);
 153                 if(client_socket < 0) {
 154                         fprintf(stderr, "ERROR: Unable to accept client connection\n");
 155                         return ;
 156                 }
 157
 158                 // Set a timeout on the user conneciton
 159                 {
 160                         struct timeval tv;
 161                         tv.tv_sec = CLIENT_TIMEOUT;
 162                         tv.tv_usec = 0;
 163                         if( setsockopt(client_socket, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) )
 164                         {
 165                                 perror("setsockopt");
 166                                 return ;
 167                         }
 168                 }
 169
 170                 // Debug: Print the connection string
 171                 if(giDebugLevel >= 2) {
 172                         char    ipstr[INET_ADDRSTRLEN];
 173                         inet_ntop(AF_INET, &client_addr.sin_addr, ipstr, INET_ADDRSTRLEN);
 174                         printf("Client connection from %s:%i\n",
 175                                 ipstr, ntohs(client_addr.sin_port));
 176                 }
 177
 178                 // Doesn't matter what, localhost is trusted
 179                 if( ntohl( client_addr.sin_addr.s_addr ) == 0x7F000001 )
 180                         bTrusted = 1;
 181
 182                 // Trusted Connections
 183                 if( ntohs(client_addr.sin_port) < 1024 )
 184                 {
 185                         // TODO: Make this runtime configurable
 186                         switch( ntohl( client_addr.sin_addr.s_addr ) )
 187                         {
 188                         case 0x7F000001:        // 127.0.0.1    localhost
 189                 //      case 0x825E0D00:        // 130.95.13.0
 190                         case 0x825E0D07:        // 130.95.13.7  motsugo
 191                         case 0x825E0D11:        // 130.95.13.17 mermaid
 192                         case 0x825E0D12:        // 130.95.13.18 mussel
 193                         case 0x825E0D17:        // 130.95.13.23 martello
 194                                 bTrusted = 1;
 195                                 break;
 196                         default:
 197                                 break;
 198                         }
 199                 }
 200
 201                 // TODO: Multithread this?
 202                 Server_HandleClient(client_socket, bTrusted);
 203
 204                 close(client_socket);
 205         }
 206 }
 207
 208 void Server_Cleanup(void)
 209 {
 210         printf("Close(%i)\n", giServer_Socket);
 211         close(giServer_Socket);
 212 }
 213
 214 /**
 215  * \brief Reads from a client socket and parses the command strings
 216  * \param Socket        Client socket number/handle
 217  * \param bTrusted      Is the client trusted?
 218  */
 219 void Server_HandleClient(int Socket, int bTrusted)
 220 {
 221         char    inbuf[INPUT_BUFFER_SIZE];
 222         char    *buf = inbuf;
 223          int    remspace = INPUT_BUFFER_SIZE-1;
 224          int    bytes = -1;
 225         tClient clientInfo;
 226
 227         memset(&clientInfo, 0, sizeof(clientInfo));
 228
 229         // Initialise Client info
 230         clientInfo.Socket = Socket;
 231         clientInfo.ID = giServer_NextClientID ++;
 232         clientInfo.bIsTrusted = bTrusted;
 233         clientInfo.EffectiveUID = -1;
 234
 235         // Read from client
 236         /*
 237          * Notes:
 238          * - The `buf` and `remspace` variables allow a line to span several
 239          *   calls to recv(), if a line is not completed in one recv() call
 240          *   it is saved to the beginning of `inbuf` and `buf` is updated to
 241          *   the end of it.
 242          */
 243         // TODO: Use select() instead (to give a timeout)
 244         while( (bytes = recv(Socket, buf, remspace, 0)) > 0 )
 245         {
 246                 char    *eol, *start;
 247                 buf[bytes] = '\0';      // Allow us to use stdlib string functions on it
 248
 249                 // Split by lines
 250                 start = inbuf;
 251                 while( (eol = strchr(start, '\n')) )
 252                 {
 253                         *eol = '\0';
 254
 255                         Server_ParseClientCommand(&clientInfo, start);
 256
 257                         start = eol + 1;
 258                 }
 259
 260                 // Check if there was an incomplete line
 261                 if( *start != '\0' ) {
 262                          int    tailBytes = bytes - (start-buf);
 263                         // Roll back in buffer
 264                         memcpy(inbuf, start, tailBytes);
 265                         remspace -= tailBytes;
 266                         if(remspace == 0) {
 267                                 send(Socket, MSG_STR_TOO_LONG, sizeof(MSG_STR_TOO_LONG), 0);
 268                                 buf = inbuf;
 269                                 remspace = INPUT_BUFFER_SIZE - 1;
 270                         }
 271                 }
 272                 else {
 273                         buf = inbuf;
 274                         remspace = INPUT_BUFFER_SIZE - 1;
 275                 }
 276         }
 277
 278         // Check for errors
 279         if( bytes < 0 ) {
 280                 fprintf(stderr, "ERROR: Unable to recieve from client on socket %i\n", Socket);
 281                 return ;
 282         }
 283
 284         if(giDebugLevel >= 2) {
 285                 printf("Client %i: Disconnected\n", clientInfo.ID);
 286         }
 287 }
 288
 289 /**
 290  * \brief Parses a client command and calls the required helper function
 291  * \param Client        Pointer to client state structure
 292  * \param CommandString Command from client (single line of the command)
 293  * \return Heap String to return to the client
 294  */
 295 void Server_ParseClientCommand(tClient *Client, char *CommandString)
 296 {
 297         char    *command, *args;
 298          int    i;
 299         #if 0
 300         char    **argList;
 301          int    numArgs = 0;
 302         #endif
 303
 304         if( Server_int_ParseArgs(1, CommandString, &command, &args, NULL) )
 305         {
 306                 // Is this an error? (just ignore for now)
 307                 args = "";
 308         }
 309
 310
 311         // Find command
 312         for( i = 0; i < NUM_COMMANDS; i++ )
 313         {
 314                 if(strcmp(CommandString, gaServer_Commands[i].Name) == 0) {
 315                         gaServer_Commands[i].Function(Client, args);
 316                         return ;
 317                 }
 318         }
 319
 320         sendf(Client->Socket, "400 Unknown Command\n");
 321 }
 322
 323 // ---
 324 // Commands
 325 // ---
 326 /**
 327  * \brief Set client username
 328  *
 329  * Usage: USER <username>
 330  */
 331 void Server_Cmd_USER(tClient *Client, char *Args)
 332 {
 333         char    *username;
 334
 335         Server_int_ParseArgs(0, Args, &username, NULL);
 336
 337         // Debug!
 338         if( giDebugLevel )
 339                 Debug(Client, "Authenticating as '%s'", username);
 340
 341         // Save username
 342         if(Client->Username)
 343                 free(Client->Username);
 344         Client->Username = strdup(username);
 345
 346         #if USE_SALT
 347         // Create a salt (that changes if the username is changed)
 348         // Yes, I know, I'm a little paranoid, but who isn't?
 349         Client->Salt[0] = 0x21 + (rand()&0x3F);
 350         Client->Salt[1] = 0x21 + (rand()&0x3F);
 351         Client->Salt[2] = 0x21 + (rand()&0x3F);
 352         Client->Salt[3] = 0x21 + (rand()&0x3F);
 353         Client->Salt[4] = 0x21 + (rand()&0x3F);
 354         Client->Salt[5] = 0x21 + (rand()&0x3F);
 355         Client->Salt[6] = 0x21 + (rand()&0x3F);
 356         Client->Salt[7] = 0x21 + (rand()&0x3F);
 357
 358         // TODO: Also send hash type to use, (SHA1 or crypt according to [DAA])
 359         sendf(Client->Socket, "100 SALT %s\n", Client->Salt);
 360         #else
 361         sendf(Client->Socket, "100 User Set\n");
 362         #endif
 363 }
 364
 365 /**
 366  * \brief Authenticate as a user
 367  *
 368  * Usage: PASS <hash>
 369  */
 370 void Server_Cmd_PASS(tClient *Client, char *Args)
 371 {
 372         char    *passhash;
 373
 374         Server_int_ParseArgs(0, Args, &passhash, NULL);
 375
 376         // Pass on to cokebank
 377         Client->UID = Bank_GetUserAuth(Client->Salt, Client->Username, passhash);
 378
 379         if( Client->UID != -1 ) {
 380                 Client->bIsAuthed = 1;
 381                 sendf(Client->Socket, "200 Auth OK\n");
 382                 return ;
 383         }
 384
 385         sendf(Client->Socket, "401 Auth Failure\n");
 386 }
 387
 388 /**
 389  * \brief Authenticate as a user without a password
 390  *
 391  * Usage: AUTOAUTH <user>
 392  */
 393 void Server_Cmd_AUTOAUTH(tClient *Client, char *Args)
 394 {
 395         char    *username;
 396
 397         Server_int_ParseArgs(0, Args, &username, NULL);
 398
 399         // Check if trusted
 400         if( !Client->bIsTrusted ) {
 401                 if(giDebugLevel)
 402                         Debug(Client, "Untrusted client attempting to AUTOAUTH");
 403                 sendf(Client->Socket, "401 Untrusted\n");
 404                 return ;
 405         }
 406
 407         // Get UID
 408         Client->UID = Bank_GetAcctByName( username );
 409         if( Client->UID < 0 ) {
 410                 if(giDebugLevel)
 411                         Debug(Client, "Unknown user '%s'", username);
 412                 sendf(Client->Socket, "401 Auth Failure\n");
 413                 return ;
 414         }
 415
 416         // You can't be an internal account
 417         if( Bank_GetFlags(Client->UID) & USER_FLAG_INTERNAL ) {
 418                 Client->UID = -1;
 419                 sendf(Client->Socket, "401 Auth Failure\n");
 420                 return ;
 421         }
 422
 423         Client->bIsAuthed = 1;
 424
 425         if(giDebugLevel)
 426                 Debug(Client, "Auto authenticated as '%s' (%i)", username, Client->UID);
 427
 428         sendf(Client->Socket, "200 Auth OK\n");
 429 }
 430
 431 /**
 432  * \brief Set effective user
 433  */
 434 void Server_Cmd_SETEUSER(tClient *Client, char *Args)
 435 {
 436         char    *username;
 437
 438         Server_int_ParseArgs(0, Args, &username, NULL);
 439
 440         if( !strlen(Args) ) {
 441                 sendf(Client->Socket, "407 SETEUSER expects an argument\n");
 442                 return ;
 443         }
 444
 445         // Check user permissions
 446         if( !(Bank_GetFlags(Client->UID) & (USER_FLAG_COKE|USER_FLAG_ADMIN)) ) {
 447                 sendf(Client->Socket, "403 Not in coke\n");
 448                 return ;
 449         }
 450
 451         // Set id
 452         Client->EffectiveUID = Bank_GetAcctByName(username);
 453         if( Client->EffectiveUID == -1 ) {
 454                 sendf(Client->Socket, "404 User not found\n");
 455                 return ;
 456         }
 457
 458         // You can't be an internal account
 459         if( Bank_GetFlags(Client->EffectiveUID) & USER_FLAG_INTERNAL ) {
 460                 Client->EffectiveUID = -1;
 461                 sendf(Client->Socket, "404 User not found\n");
 462                 return ;
 463         }
 464
 465         sendf(Client->Socket, "200 User set\n");
 466 }
 467
 468 /**
 469  * \brief Enumerate the items that the server knows about
 470  */
 471 void Server_Cmd_ENUMITEMS(tClient *Client, char *Args)
 472 {
 473          int    i, count;
 474
 475         if( Args != NULL && strlen(Args) ) {
 476                 sendf(Client->Socket, "407 ENUM_ITEMS takes no arguments\n");
 477                 return ;
 478         }
 479
 480         // Count shown items
 481         count = 0;
 482         for( i = 0; i < giNumItems; i ++ ) {
 483                 if( gaItems[i].bHidden )        continue;
 484                 count ++;
 485         }
 486
 487         sendf(Client->Socket, "201 Items %i\n", count);
 488
 489         for( i = 0; i < giNumItems; i ++ ) {
 490                 if( gaItems[i].bHidden )        continue;
 491                 sendf(Client->Socket,
 492                         "202 Item %s:%i %i %s\n",
 493                          gaItems[i].Handler->Name, gaItems[i].ID, gaItems[i].Price, gaItems[i].Name
 494                          );
 495         }
 496
 497         sendf(Client->Socket, "200 List end\n");
 498 }
 499
 500 tItem *_GetItemFromString(char *String)
 501 {
 502         tHandler        *handler;
 503         char    *type = String;
 504         char    *colon = strchr(String, ':');
 505          int    num, i;
 506
 507         if( !colon ) {
 508                 return NULL;
 509         }
 510
 511         num = atoi(colon+1);
 512         *colon = '\0';
 513
 514         // Find handler
 515         handler = NULL;
 516         for( i = 0; i < giNumHandlers; i ++ )
 517         {
 518                 if( strcmp(gaHandlers[i]->Name, type) == 0) {
 519                         handler = gaHandlers[i];
 520                         break;
 521                 }
 522         }
 523         if( !handler ) {
 524                 return NULL;
 525         }
 526
 527         // Find item
 528         for( i = 0; i < giNumItems; i ++ )
 529         {
 530                 if( gaItems[i].Handler != handler )     continue;
 531                 if( gaItems[i].ID != num )      continue;
 532                 return &gaItems[i];
 533         }
 534         return NULL;
 535 }
 536
 537 /**
 538  * \brief Fetch information on a specific item
 539  */
 540 void Server_Cmd_ITEMINFO(tClient *Client, char *Args)
 541 {
 542         tItem   *item;
 543         char    *itemname;
 544
 545         if( Server_int_ParseArgs(0, Args, &itemname, NULL) ) {
 546                 sendf(Client->Socket, "407 ITEMINFO takes 1 argument\n");
 547                 return ;
 548         }
 549         item = _GetItemFromString(Args);
 550
 551         if( !item ) {
 552                 sendf(Client->Socket, "406 Bad Item ID\n");
 553                 return ;
 554         }
 555
 556         sendf(Client->Socket,
 557                 "202 Item %s:%i %i %s\n",
 558                  item->Handler->Name, item->ID, item->Price, item->Name
 559                  );
 560 }
 561
 562 void Server_Cmd_DISPENSE(tClient *Client, char *Args)
 563 {
 564         tItem   *item;
 565          int    ret;
 566          int    uid;
 567         char    *itemname;
 568
 569         if( Server_int_ParseArgs(0, Args, &itemname, NULL) ) {
 570                 sendf(Client->Socket, "407 DISPENSE takes only 1 argument\n");
 571                 return ;
 572         }
 573
 574         if( !Client->bIsAuthed ) {
 575                 sendf(Client->Socket, "401 Not Authenticated\n");
 576                 return ;
 577         }
 578
 579         item = _GetItemFromString(itemname);
 580         if( !item ) {
 581                 sendf(Client->Socket, "406 Bad Item ID\n");
 582                 return ;
 583         }
 584
 585         if( Client->EffectiveUID != -1 ) {
 586                 uid = Client->EffectiveUID;
 587         }
 588         else {
 589                 uid = Client->UID;
 590         }
 591
 592         switch( ret = DispenseItem( Client->UID, uid, item ) )
 593         {
 594         case 0: sendf(Client->Socket, "200 Dispense OK\n");     return ;
 595         case 1: sendf(Client->Socket, "501 Unable to dispense\n");      return ;
 596         case 2: sendf(Client->Socket, "402 Poor You\n");        return ;
 597         default:
 598                 sendf(Client->Socket, "500 Dispense Error\n");
 599                 return ;
 600         }
 601 }
 602
 603 void Server_Cmd_GIVE(tClient *Client, char *Args)
 604 {
 605         char    *recipient, *ammount, *reason;
 606          int    uid, iAmmount;
 607          int    thisUid;
 608
 609         // Parse arguments
 610         if( Server_int_ParseArgs(1, Args, &recipient, &ammount, &reason, NULL) ) {
 611                 sendf(Client->Socket, "407 GIVE takes only 3 arguments\n");
 612                 return ;
 613         }
 614         // Check for authed
 615         if( !Client->bIsAuthed ) {
 616                 sendf(Client->Socket, "401 Not Authenticated\n");
 617                 return ;
 618         }
 619
 620         // Get recipient
 621         uid = Bank_GetAcctByName(recipient);
 622         if( uid == -1 ) {
 623                 sendf(Client->Socket, "404 Invalid target user\n");
 624                 return ;
 625         }
 626
 627         // You can't alter an internal account
 628         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 629                 sendf(Client->Socket, "404 Invalid target user\n");
 630                 return ;
 631         }
 632
 633         // Parse ammount
 634         iAmmount = atoi(ammount);
 635         if( iAmmount <= 0 ) {
 636                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 637                 return ;
 638         }
 639
 640         if( Client->EffectiveUID != -1 ) {
 641                 thisUid = Client->EffectiveUID;
 642         }
 643         else {
 644                 thisUid = Client->UID;
 645         }
 646
 647         // Do give
 648         switch( DispenseGive(Client->UID, thisUid, uid, iAmmount, reason) )
 649         {
 650         case 0:
 651                 sendf(Client->Socket, "200 Give OK\n");
 652                 return ;
 653         case 2:
 654                 sendf(Client->Socket, "402 Poor You\n");
 655                 return ;
 656         default:
 657                 sendf(Client->Socket, "500 Unknown error\n");
 658                 return ;
 659         }
 660 }
 661
 662 void Server_Cmd_DONATE(tClient *Client, char *Args)
 663 {
 664         char    *ammount, *reason;
 665          int    iAmmount;
 666          int    thisUid;
 667
 668         // Parse arguments
 669         if( Server_int_ParseArgs(1, Args, &ammount, &reason, NULL) ) {
 670                 sendf(Client->Socket, "407 DONATE takes 2 arguments\n");
 671                 return ;
 672         }
 673
 674         if( !Client->bIsAuthed ) {
 675                 sendf(Client->Socket, "401 Not Authenticated\n");
 676                 return ;
 677         }
 678
 679         // Parse ammount
 680         iAmmount = atoi(ammount);
 681         if( iAmmount <= 0 ) {
 682                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 683                 return ;
 684         }
 685
 686         // Handle effective users
 687         if( Client->EffectiveUID != -1 ) {
 688                 thisUid = Client->EffectiveUID;
 689         }
 690         else {
 691                 thisUid = Client->UID;
 692         }
 693
 694         // Do give
 695         switch( DispenseDonate(Client->UID, thisUid, iAmmount, reason) )
 696         {
 697         case 0:
 698                 sendf(Client->Socket, "200 Give OK\n");
 699                 return ;
 700         case 2:
 701                 sendf(Client->Socket, "402 Poor You\n");
 702                 return ;
 703         default:
 704                 sendf(Client->Socket, "500 Unknown error\n");
 705                 return ;
 706         }
 707 }
 708
 709 void Server_Cmd_ADD(tClient *Client, char *Args)
 710 {
 711         char    *user, *ammount, *reason;
 712          int    uid, iAmmount;
 713
 714         // Parse arguments
 715         if( Server_int_ParseArgs(1, Args, &user, &ammount, &reason, NULL) ) {
 716                 sendf(Client->Socket, "407 ADD takes 3 arguments\n");
 717                 return ;
 718         }
 719
 720         if( !Client->bIsAuthed ) {
 721                 sendf(Client->Socket, "401 Not Authenticated\n");
 722                 return ;
 723         }
 724
 725         // Check user permissions
 726         if( !(Bank_GetFlags(Client->UID) & (USER_FLAG_COKE|USER_FLAG_ADMIN))  ) {
 727                 sendf(Client->Socket, "403 Not in coke\n");
 728                 return ;
 729         }
 730
 731         // Get recipient
 732         uid = Bank_GetAcctByName(user);
 733         if( uid == -1 ) {
 734                 sendf(Client->Socket, "404 Invalid user\n");
 735                 return ;
 736         }
 737
 738         // You can't alter an internal account
 739         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 740                 sendf(Client->Socket, "404 Invalid user\n");
 741                 return ;
 742         }
 743
 744         // Parse ammount
 745         iAmmount = atoi(ammount);
 746         if( iAmmount == 0 && ammount[0] != '0' ) {
 747                 sendf(Client->Socket, "407 Invalid Argument\n");
 748                 return ;
 749         }
 750
 751         // Do give
 752         switch( DispenseAdd(Client->UID, uid, iAmmount, reason) )
 753         {
 754         case 0:
 755                 sendf(Client->Socket, "200 Add OK\n");
 756                 return ;
 757         case 2:
 758                 sendf(Client->Socket, "402 Poor Guy\n");
 759                 return ;
 760         default:
 761                 sendf(Client->Socket, "500 Unknown error\n");
 762                 return ;
 763         }
 764 }
 765
 766 void Server_Cmd_SET(tClient *Client, char *Args)
 767 {
 768         char    *user, *ammount, *reason;
 769          int    uid, iAmmount;
 770
 771         // Parse arguments
 772         if( Server_int_ParseArgs(1, Args, &user, &ammount, &reason, NULL) ) {
 773                 sendf(Client->Socket, "407 SET takes 3 arguments\n");
 774                 return ;
 775         }
 776
 777         if( !Client->bIsAuthed ) {
 778                 sendf(Client->Socket, "401 Not Authenticated\n");
 779                 return ;
 780         }
 781
 782         // Check user permissions
 783         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN)  ) {
 784                 sendf(Client->Socket, "403 Not an admin\n");
 785                 return ;
 786         }
 787
 788         // Get recipient
 789         uid = Bank_GetAcctByName(user);
 790         if( uid == -1 ) {
 791                 sendf(Client->Socket, "404 Invalid user\n");
 792                 return ;
 793         }
 794
 795         // You can't alter an internal account
 796         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 797                 sendf(Client->Socket, "404 Invalid user\n");
 798                 return ;
 799         }
 800
 801         // Parse ammount
 802         iAmmount = atoi(ammount);
 803         if( iAmmount == 0 && ammount[0] != '0' ) {
 804                 sendf(Client->Socket, "407 Invalid Argument\n");
 805                 return ;
 806         }
 807
 808         // Do give
 809         switch( DispenseSet(Client->UID, uid, iAmmount, reason) )
 810         {
 811         case 0:
 812                 sendf(Client->Socket, "200 Add OK\n");
 813                 return ;
 814         case 2:
 815                 sendf(Client->Socket, "402 Poor Guy\n");
 816                 return ;
 817         default:
 818                 sendf(Client->Socket, "500 Unknown error\n");
 819                 return ;
 820         }
 821 }
 822
 823 void Server_Cmd_ENUMUSERS(tClient *Client, char *Args)
 824 {
 825          int    i, numRet = 0;
 826         tAcctIterator   *it;
 827          int    maxBal = INT_MAX, minBal = INT_MIN;
 828          int    flagMask = 0, flagVal = 0;
 829          int    sort = BANK_ITFLAG_SORT_NAME;
 830         time_t  lastSeenAfter=0, lastSeenBefore=0;
 831
 832          int    flags;  // Iterator flags
 833          int    balValue;       // Balance value for iterator
 834         time_t  timeValue;      // Time value for iterator
 835
 836         // Parse arguments
 837         if( Args && strlen(Args) )
 838         {
 839                 char    *space = Args, *type, *val;
 840                 do
 841                 {
 842                         type = space;
 843                         while(*type == ' ')     type ++;
 844                         // Get next space
 845                         space = strchr(space, ' ');
 846                         if(space)       *space = '\0';
 847
 848                         // Get type
 849                         val = strchr(type, ':');
 850                         if( val ) {
 851                                 *val = '\0';
 852                                 val ++;
 853
 854                                 // Types
 855                                 // - Minium Balance
 856                                 if( strcmp(type, "min_balance") == 0 ) {
 857                                         minBal = atoi(val);
 858                                 }
 859                                 // - Maximum Balance
 860                                 else if( strcmp(type, "max_balance") == 0 ) {
 861                                         maxBal = atoi(val);
 862                                 }
 863                                 // - Flags
 864                                 else if( strcmp(type, "flags") == 0 ) {
 865                                         if( Server_int_ParseFlags(Client, val, &flagMask, &flagVal) )
 866                                                 return ;
 867                                 }
 868                                 // - Last seen before timestamp
 869                                 else if( strcmp(type, "last_seen_before") == 0 ) {
 870                                         lastSeenAfter = atoll(val);
 871                                 }
 872                                 // - Last seen after timestamp
 873                                 else if( strcmp(type, "last_seen_after") == 0 ) {
 874                                         lastSeenAfter = atoll(val);
 875                                 }
 876                                 // - Sorting
 877                                 else if( strcmp(type, "sort") == 0 ) {
 878                                         char    *dash = strchr(val, '-');
 879                                         if( dash ) {
 880                                                 *dash = '\0';
 881                                                 dash ++;
 882                                         }
 883                                         if( strcmp(val, "name") == 0 ) {
 884                                                 sort = BANK_ITFLAG_SORT_NAME;
 885                                         }
 886                                         else if( strcmp(val, "balance") == 0 ) {
 887                                                 sort = BANK_ITFLAG_SORT_BAL;
 888                                         }
 889                                         else if( strcmp(val, "lastseen") == 0 ) {
 890                                                 sort = BANK_ITFLAG_SORT_LASTSEEN;
 891                                         }
 892                                         else {
 893                                                 sendf(Client->Socket, "407 Unknown sort field ('%s')\n", val);
 894                                                 return ;
 895                                         }
 896                                         // Handle sort direction
 897                                         if( dash ) {
 898                                                 if( strcmp(dash, "desc") == 0 ) {
 899                                                         sort |= BANK_ITFLAG_REVSORT;
 900                                                 }
 901                                                 else {
 902                                                         sendf(Client->Socket, "407 Unknown sort direction '%s'\n", dash);
 903                                                         return ;
 904                                                 }
 905                                                 dash[-1] = '-';
 906                                         }
 907                                 }
 908                                 else {
 909                                         sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s:%s'\n", type, val);
 910                                         return ;
 911                                 }
 912
 913                                 val[-1] = ':';
 914                         }
 915                         else {
 916                                 sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s'\n", type);
 917                                 return ;
 918                         }
 919
 920                         // Eat whitespace
 921                         if( space ) {
 922                                 *space = ' ';   // Repair (to be nice)
 923                                 space ++;
 924                                 while(*space == ' ')    space ++;
 925                         }
 926                 }       while(space);
 927         }
 928
 929         // Create iterator
 930         if( maxBal != INT_MAX ) {
 931                 flags = sort|BANK_ITFLAG_MAXBALANCE;
 932                 balValue = maxBal;
 933         }
 934         else if( minBal != INT_MIN ) {
 935                 flags = sort|BANK_ITFLAG_MINBALANCE;
 936                 balValue = minBal;
 937         }
 938         else {
 939                 flags = sort;
 940                 balValue = 0;
 941         }
 942         if( lastSeenBefore ) {
 943                 timeValue = lastSeenBefore;
 944                 flags |= BANK_ITFLAG_SEENBEFORE;
 945         }
 946         else if( lastSeenAfter ) {
 947                 timeValue = lastSeenAfter;
 948                 flags |= BANK_ITFLAG_SEENAFTER;
 949         }
 950         else {
 951                 timeValue = 0;
 952         }
 953         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
 954
 955         // Get return number
 956         while( (i = Bank_IteratorNext(it)) != -1 )
 957         {
 958                 int bal = Bank_GetBalance(i);
 959
 960                 if( bal == INT_MIN )    continue;
 961
 962                 if( bal < minBal )      continue;
 963                 if( bal > maxBal )      continue;
 964
 965                 numRet ++;
 966         }
 967
 968         Bank_DelIterator(it);
 969
 970         // Send count
 971         sendf(Client->Socket, "201 Users %i\n", numRet);
 972
 973
 974         // Create iterator
 975         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
 976
 977         while( (i = Bank_IteratorNext(it)) != -1 )
 978         {
 979                 int bal = Bank_GetBalance(i);
 980
 981                 if( bal == INT_MIN )    continue;
 982
 983                 if( bal < minBal )      continue;
 984                 if( bal > maxBal )      continue;
 985
 986                 _SendUserInfo(Client, i);
 987         }
 988
 989         Bank_DelIterator(it);
 990
 991         sendf(Client->Socket, "200 List End\n");
 992 }
 993
 994 void Server_Cmd_USERINFO(tClient *Client, char *Args)
 995 {
 996          int    uid;
 997         char    *user;
 998
 999         // Parse arguments
1000         if( Server_int_ParseArgs(0, Args, &user, NULL) ) {
1001                 sendf(Client->Socket, "407 USER_INFO takes 1 argument\n");
1002                 return ;
1003         }
1004
1005         if( giDebugLevel )      Debug(Client, "User Info '%s'", user);
1006
1007         // Get recipient
1008         uid = Bank_GetAcctByName(user);
1009
1010         if( giDebugLevel >= 2 ) Debug(Client, "uid = %i", uid);
1011         if( uid == -1 ) {
1012                 sendf(Client->Socket, "404 Invalid user\n");
1013                 return ;
1014         }
1015
1016         _SendUserInfo(Client, uid);
1017 }
1018
1019 void _SendUserInfo(tClient *Client, int UserID)
1020 {
1021         char    *type, *disabled="", *door="";
1022          int    flags = Bank_GetFlags(UserID);
1023
1024         if( flags & USER_FLAG_INTERNAL ) {
1025                 type = "internal";
1026         }
1027         else if( flags & USER_FLAG_COKE ) {
1028                 if( flags & USER_FLAG_ADMIN )
1029                         type = "coke,admin";
1030                 else
1031                         type = "coke";
1032         }
1033         else if( flags & USER_FLAG_ADMIN ) {
1034                 type = "admin";
1035         }
1036         else {
1037                 type = "user";
1038         }
1039
1040         if( flags & USER_FLAG_DISABLED )
1041                 disabled = ",disabled";
1042         if( flags & USER_FLAG_DOORGROUP )
1043                 door = ",door";
1044
1045         // TODO: User flags/type
1046         sendf(
1047                 Client->Socket, "202 User %s %i %s%s%s\n",
1048                 Bank_GetAcctName(UserID), Bank_GetBalance(UserID),
1049                 type, disabled, door
1050                 );
1051 }
1052
1053 void Server_Cmd_USERADD(tClient *Client, char *Args)
1054 {
1055         char    *username;
1056
1057         // Parse arguments
1058         if( Server_int_ParseArgs(0, Args, &username, NULL) ) {
1059                 sendf(Client->Socket, "407 USER_ADD takes 1 argument\n");
1060                 return ;
1061         }
1062
1063         // Check permissions
1064         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1065                 sendf(Client->Socket, "403 Not a coke admin\n");
1066                 return ;
1067         }
1068
1069         // Try to create user
1070         if( Bank_CreateAcct(username) == -1 ) {
1071                 sendf(Client->Socket, "404 User exists\n");
1072                 return ;
1073         }
1074
1075         {
1076                 char    *thisName = Bank_GetAcctName(Client->UID);
1077                 Log_Info("Account '%s' created by '%s'", username, thisName);
1078                 free(thisName);
1079         }
1080
1081         sendf(Client->Socket, "200 User Added\n");
1082 }
1083
1084 void Server_Cmd_USERFLAGS(tClient *Client, char *Args)
1085 {
1086         char    *username, *flags;
1087          int    mask=0, value=0;
1088          int    uid;
1089
1090         // Parse arguments
1091         if( Server_int_ParseArgs(0, Args, &username, &flags, NULL) ) {
1092                 sendf(Client->Socket, "407 USER_FLAGS takes 2 arguments\n");
1093                 return ;
1094         }
1095
1096         // Check permissions
1097         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1098                 sendf(Client->Socket, "403 Not a coke admin\n");
1099                 return ;
1100         }
1101
1102         // Get UID
1103         uid = Bank_GetAcctByName(username);
1104         if( uid == -1 ) {
1105                 sendf(Client->Socket, "404 User '%s' not found\n", username);
1106                 return ;
1107         }
1108
1109         // Parse flags
1110         if( Server_int_ParseFlags(Client, flags, &mask, &value) )
1111                 return ;
1112
1113         if( giDebugLevel )
1114                 Debug(Client, "Set %i(%s) flags to %x (masked %x)\n",
1115                         uid, username, mask, value);
1116
1117         // Apply flags
1118         Bank_SetFlags(uid, mask, value);
1119
1120         // Return OK
1121         sendf(Client->Socket, "200 User Updated\n");
1122 }
1123
1124 // --- INTERNAL HELPERS ---
1125 void Debug(tClient *Client, const char *Format, ...)
1126 {
1127         va_list args;
1128         //printf("%010i [%i] ", (int)time(NULL), Client->ID);
1129         printf("[%i] ", Client->ID);
1130         va_start(args, Format);
1131         vprintf(Format, args);
1132         va_end(args);
1133         printf("\n");
1134 }
1135
1136 int sendf(int Socket, const char *Format, ...)
1137 {
1138         va_list args;
1139          int    len;
1140
1141         va_start(args, Format);
1142         len = vsnprintf(NULL, 0, Format, args);
1143         va_end(args);
1144
1145         {
1146                 char    buf[len+1];
1147                 va_start(args, Format);
1148                 vsnprintf(buf, len+1, Format, args);
1149                 va_end(args);
1150
1151                 #if DEBUG_TRACE_CLIENT
1152                 printf("sendf: %s", buf);
1153                 #endif
1154
1155                 return send(Socket, buf, len, 0);
1156         }
1157 }
1158
1159 // Takes a series of char *'s in
1160 /**
1161  * \brief Parse space-separated entries into
1162  */
1163 int Server_int_ParseArgs(int bUseLongLast, char *ArgStr, ...)
1164 {
1165         va_list args;
1166         char    savedChar = *ArgStr;
1167         char    **dest;
1168         va_start(args, ArgStr);
1169
1170         while( (dest = va_arg(args, char **)) )
1171         {
1172                 // Trim leading spaces
1173                 while( *ArgStr == ' ' || *ArgStr == '\t' )
1174                         ArgStr ++;
1175
1176                 // ... oops, not enough arguments
1177                 if( *ArgStr == '\0' )
1178                 {
1179                         // NULL unset arguments
1180                         do {
1181                                 *dest = NULL;
1182                         }       while( (dest = va_arg(args, char **)) );
1183                         return -1;
1184                 }
1185
1186                 // Set destination
1187                 *dest = ArgStr;
1188
1189                 if( *ArgStr == '"' )
1190                 {
1191                         // Read until quote
1192                         while( *ArgStr && *ArgStr != '"' )
1193                                 ArgStr ++;
1194                 }
1195                 else
1196                 {
1197                         // Read until a space
1198                         while( *ArgStr && *ArgStr != ' ' && *ArgStr != '\t' )
1199                                 ArgStr ++;
1200                 }
1201                 savedChar = *ArgStr;    // savedChar is used to un-mangle the last string
1202                 *ArgStr = '\0';
1203         }
1204
1205         // Oops, extra arguments, and greedy not set
1206         if( savedChar == ' ' && bUseLongLast )
1207                 return -1;
1208
1209         // Un-mangle last
1210         if(bUseLongLast)
1211                 *ArgStr = savedChar;
1212
1213         va_end(args);
1214
1215         return 0;       // Success!
1216 }
1217
1218 int Server_int_ParseFlags(tClient *Client, const char *Str, int *Mask, int *Value)
1219 {
1220         struct {
1221                 const char      *Name;
1222                  int    Mask;
1223                  int    Value;
1224         }       cFLAGS[] = {
1225                  {"disabled", USER_FLAG_DISABLED, USER_FLAG_DISABLED}
1226                 ,{"door", USER_FLAG_DOORGROUP, USER_FLAG_DOORGROUP}
1227                 ,{"coke", USER_FLAG_COKE, USER_FLAG_COKE}
1228                 ,{"admin", USER_FLAG_ADMIN, USER_FLAG_ADMIN}
1229                 ,{"internal", USER_FLAG_INTERNAL, USER_FLAG_INTERNAL}
1230         };
1231         const int       ciNumFlags = sizeof(cFLAGS)/sizeof(cFLAGS[0]);
1232
1233         char    *space;
1234
1235         *Mask = 0;
1236         *Value = 0;
1237
1238         do {
1239                  int    bRemove = 0;
1240                  int    i;
1241                  int    len;
1242
1243                 while( *Str == ' ' )    Str ++; // Eat whitespace
1244                 space = strchr(Str, ',');       // Find the end of the flag
1245                 if(space)
1246                         len = space - Str;
1247                 else
1248                         len = strlen(Str);
1249
1250                 // Check for inversion/removal
1251                 if( *Str == '!' || *Str == '-' ) {
1252                         bRemove = 1;
1253                         Str ++;
1254                 }
1255                 else if( *Str == '+' ) {
1256                         Str ++;
1257                 }
1258
1259                 // Check flag values
1260                 for( i = 0; i < ciNumFlags; i ++ )
1261                 {
1262                         if( strncmp(Str, cFLAGS[i].Name, len) == 0 ) {
1263                                 *Mask |= cFLAGS[i].Mask;
1264                                 *Value &= ~cFLAGS[i].Mask;
1265                                 if( !bRemove )
1266                                         *Value |= cFLAGS[i].Value;
1267                                 break;
1268                         }
1269                 }
1270
1271                 // Error check
1272                 if( i == ciNumFlags ) {
1273                         char    val[len+1];
1274                         strncpy(val, Str, len+1);
1275                         sendf(Client->Socket, "407 Unknown flag value '%s'\n", val);
1276                         return -1;
1277                 }
1278
1279                 Str = space + 1;
1280         } while(space);
1281
1282         return 0;
1283 }