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 0x825F0D00:        // 130.95.13.0
 190                         case 0x825F0D07:        // 130.95.13.7  motsugo
 191                         case 0x825F0D11:        // 130.95.13.17 mermaid
 192                         case 0x825F0D12:        // 130.95.13.18 mussel
 193                         case 0x825F0D17:        // 130.95.13.23 martello
 194                         case 0x825F0D42:        // 130.95.13.66 heathred
 195                                 bTrusted = 1;
 196                                 break;
 197                         default:
 198                                 break;
 199                         }
 200                 }
 201
 202                 // TODO: Multithread this?
 203                 Server_HandleClient(client_socket, bTrusted);
 204
 205                 close(client_socket);
 206         }
 207 }
 208
 209 void Server_Cleanup(void)
 210 {
 211         printf("Close(%i)\n", giServer_Socket);
 212         close(giServer_Socket);
 213 }
 214
 215 /**
 216  * \brief Reads from a client socket and parses the command strings
 217  * \param Socket        Client socket number/handle
 218  * \param bTrusted      Is the client trusted?
 219  */
 220 void Server_HandleClient(int Socket, int bTrusted)
 221 {
 222         char    inbuf[INPUT_BUFFER_SIZE];
 223         char    *buf = inbuf;
 224          int    remspace = INPUT_BUFFER_SIZE-1;
 225          int    bytes = -1;
 226         tClient clientInfo;
 227
 228         memset(&clientInfo, 0, sizeof(clientInfo));
 229
 230         // Initialise Client info
 231         clientInfo.Socket = Socket;
 232         clientInfo.ID = giServer_NextClientID ++;
 233         clientInfo.bIsTrusted = bTrusted;
 234         clientInfo.EffectiveUID = -1;
 235
 236         // Read from client
 237         /*
 238          * Notes:
 239          * - The `buf` and `remspace` variables allow a line to span several
 240          *   calls to recv(), if a line is not completed in one recv() call
 241          *   it is saved to the beginning of `inbuf` and `buf` is updated to
 242          *   the end of it.
 243          */
 244         // TODO: Use select() instead (to give a timeout)
 245         while( (bytes = recv(Socket, buf, remspace, 0)) > 0 )
 246         {
 247                 char    *eol, *start;
 248                 buf[bytes] = '\0';      // Allow us to use stdlib string functions on it
 249
 250                 // Split by lines
 251                 start = inbuf;
 252                 while( (eol = strchr(start, '\n')) )
 253                 {
 254                         *eol = '\0';
 255
 256                         Server_ParseClientCommand(&clientInfo, start);
 257
 258                         start = eol + 1;
 259                 }
 260
 261                 // Check if there was an incomplete line
 262                 if( *start != '\0' ) {
 263                          int    tailBytes = bytes - (start-buf);
 264                         // Roll back in buffer
 265                         memcpy(inbuf, start, tailBytes);
 266                         remspace -= tailBytes;
 267                         if(remspace == 0) {
 268                                 send(Socket, MSG_STR_TOO_LONG, sizeof(MSG_STR_TOO_LONG), 0);
 269                                 buf = inbuf;
 270                                 remspace = INPUT_BUFFER_SIZE - 1;
 271                         }
 272                 }
 273                 else {
 274                         buf = inbuf;
 275                         remspace = INPUT_BUFFER_SIZE - 1;
 276                 }
 277         }
 278
 279         // Check for errors
 280         if( bytes < 0 ) {
 281                 fprintf(stderr, "ERROR: Unable to recieve from client on socket %i\n", Socket);
 282                 return ;
 283         }
 284
 285         if(giDebugLevel >= 2) {
 286                 printf("Client %i: Disconnected\n", clientInfo.ID);
 287         }
 288 }
 289
 290 /**
 291  * \brief Parses a client command and calls the required helper function
 292  * \param Client        Pointer to client state structure
 293  * \param CommandString Command from client (single line of the command)
 294  * \return Heap String to return to the client
 295  */
 296 void Server_ParseClientCommand(tClient *Client, char *CommandString)
 297 {
 298         char    *command, *args;
 299          int    i;
 300
 301         if( giDebugLevel >= 2 )
 302                 Debug(Client, "Server_ParseClientCommand: (CommandString = '%s')", CommandString);
 303
 304         if( Server_int_ParseArgs(1, CommandString, &command, &args, NULL) )
 305         {
 306                 printf("command=%s, args=%s\n", command, args);
 307                 // Is this an error? (just ignore for now)
 308                 //args = "";
 309         }
 310
 311
 312         // Find command
 313         for( i = 0; i < NUM_COMMANDS; i++ )
 314         {
 315                 if(strcmp(command, gaServer_Commands[i].Name) == 0) {
 316                         if( giDebugLevel >= 2 )
 317                                 Debug(Client, "CMD %s - \"%s\"", command, args);
 318                         gaServer_Commands[i].Function(Client, args);
 319                         return ;
 320                 }
 321         }
 322
 323         sendf(Client->Socket, "400 Unknown Command\n");
 324 }
 325
 326 // ---
 327 // Commands
 328 // ---
 329 /**
 330  * \brief Set client username
 331  *
 332  * Usage: USER <username>
 333  */
 334 void Server_Cmd_USER(tClient *Client, char *Args)
 335 {
 336         char    *username;
 337
 338         if( Server_int_ParseArgs(0, Args, &username, NULL) )
 339         {
 340                 sendf(Client->Socket, "407 USER takes 1 argument\n");
 341                 return ;
 342         }
 343
 344         // Debug!
 345         if( giDebugLevel )
 346                 Debug(Client, "Authenticating as '%s'", username);
 347
 348         // Save username
 349         if(Client->Username)
 350                 free(Client->Username);
 351         Client->Username = strdup(username);
 352
 353         #if USE_SALT
 354         // Create a salt (that changes if the username is changed)
 355         // Yes, I know, I'm a little paranoid, but who isn't?
 356         Client->Salt[0] = 0x21 + (rand()&0x3F);
 357         Client->Salt[1] = 0x21 + (rand()&0x3F);
 358         Client->Salt[2] = 0x21 + (rand()&0x3F);
 359         Client->Salt[3] = 0x21 + (rand()&0x3F);
 360         Client->Salt[4] = 0x21 + (rand()&0x3F);
 361         Client->Salt[5] = 0x21 + (rand()&0x3F);
 362         Client->Salt[6] = 0x21 + (rand()&0x3F);
 363         Client->Salt[7] = 0x21 + (rand()&0x3F);
 364
 365         // TODO: Also send hash type to use, (SHA1 or crypt according to [DAA])
 366         sendf(Client->Socket, "100 SALT %s\n", Client->Salt);
 367         #else
 368         sendf(Client->Socket, "100 User Set\n");
 369         #endif
 370 }
 371
 372 /**
 373  * \brief Authenticate as a user
 374  *
 375  * Usage: PASS <hash>
 376  */
 377 void Server_Cmd_PASS(tClient *Client, char *Args)
 378 {
 379         char    *passhash;
 380
 381         if( Server_int_ParseArgs(0, Args, &passhash, NULL) )
 382         {
 383                 sendf(Client->Socket, "407 PASS takes 1 argument\n");
 384                 return ;
 385         }
 386
 387         // Pass on to cokebank
 388         Client->UID = Bank_GetUserAuth(Client->Salt, Client->Username, passhash);
 389
 390         if( Client->UID != -1 ) {
 391                 Client->bIsAuthed = 1;
 392                 sendf(Client->Socket, "200 Auth OK\n");
 393                 return ;
 394         }
 395
 396         sendf(Client->Socket, "401 Auth Failure\n");
 397 }
 398
 399 /**
 400  * \brief Authenticate as a user without a password
 401  *
 402  * Usage: AUTOAUTH <user>
 403  */
 404 void Server_Cmd_AUTOAUTH(tClient *Client, char *Args)
 405 {
 406         char    *username;
 407
 408         if( Server_int_ParseArgs(0, Args, &username, NULL) )
 409         {
 410                 sendf(Client->Socket, "407 AUTOAUTH takes 1 argument\n");
 411                 return ;
 412         }
 413
 414         // Check if trusted
 415         if( !Client->bIsTrusted ) {
 416                 if(giDebugLevel)
 417                         Debug(Client, "Untrusted client attempting to AUTOAUTH");
 418                 sendf(Client->Socket, "401 Untrusted\n");
 419                 return ;
 420         }
 421
 422         // Get UID
 423         Client->UID = Bank_GetAcctByName( username );
 424         if( Client->UID < 0 ) {
 425                 if(giDebugLevel)
 426                         Debug(Client, "Unknown user '%s'", username);
 427                 sendf(Client->Socket, "401 Auth Failure\n");
 428                 return ;
 429         }
 430
 431         // You can't be an internal account
 432         if( Bank_GetFlags(Client->UID) & USER_FLAG_INTERNAL ) {
 433                 if(giDebugLevel)
 434                         Debug(Client, "Autoauth as '%s', not allowed", username);
 435                 Client->UID = -1;
 436                 sendf(Client->Socket, "401 Auth Failure\n");
 437                 return ;
 438         }
 439
 440         Client->bIsAuthed = 1;
 441
 442         if(giDebugLevel)
 443                 Debug(Client, "Auto authenticated as '%s' (%i)", username, Client->UID);
 444
 445         sendf(Client->Socket, "200 Auth OK\n");
 446 }
 447
 448 /**
 449  * \brief Set effective user
 450  */
 451 void Server_Cmd_SETEUSER(tClient *Client, char *Args)
 452 {
 453         char    *username;
 454
 455         if( Server_int_ParseArgs(0, Args, &username, NULL) )
 456         {
 457                 sendf(Client->Socket, "407 SETEUSER takes 1 argument\n");
 458                 return ;
 459         }
 460
 461         if( !strlen(Args) ) {
 462                 sendf(Client->Socket, "407 SETEUSER expects an argument\n");
 463                 return ;
 464         }
 465
 466         // Check user permissions
 467         if( !(Bank_GetFlags(Client->UID) & (USER_FLAG_COKE|USER_FLAG_ADMIN)) ) {
 468                 sendf(Client->Socket, "403 Not in coke\n");
 469                 return ;
 470         }
 471
 472         // Set id
 473         Client->EffectiveUID = Bank_GetAcctByName(username);
 474         if( Client->EffectiveUID == -1 ) {
 475                 sendf(Client->Socket, "404 User not found\n");
 476                 return ;
 477         }
 478
 479         // You can't be an internal account
 480         if( Bank_GetFlags(Client->EffectiveUID) & USER_FLAG_INTERNAL ) {
 481                 Client->EffectiveUID = -1;
 482                 sendf(Client->Socket, "404 User not found\n");
 483                 return ;
 484         }
 485
 486         sendf(Client->Socket, "200 User set\n");
 487 }
 488
 489 /**
 490  * \brief Enumerate the items that the server knows about
 491  */
 492 void Server_Cmd_ENUMITEMS(tClient *Client, char *Args)
 493 {
 494          int    i, count;
 495
 496         if( Args != NULL && strlen(Args) ) {
 497                 sendf(Client->Socket, "407 ENUM_ITEMS takes no arguments\n");
 498                 return ;
 499         }
 500
 501         // Count shown items
 502         count = 0;
 503         for( i = 0; i < giNumItems; i ++ ) {
 504                 if( gaItems[i].bHidden )        continue;
 505                 count ++;
 506         }
 507
 508         sendf(Client->Socket, "201 Items %i\n", count);
 509
 510         for( i = 0; i < giNumItems; i ++ ) {
 511                 if( gaItems[i].bHidden )        continue;
 512                 sendf(Client->Socket,
 513                         "202 Item %s:%i %i %s\n",
 514                          gaItems[i].Handler->Name, gaItems[i].ID, gaItems[i].Price, gaItems[i].Name
 515                          );
 516         }
 517
 518         sendf(Client->Socket, "200 List end\n");
 519 }
 520
 521 tItem *_GetItemFromString(char *String)
 522 {
 523         tHandler        *handler;
 524         char    *type = String;
 525         char    *colon = strchr(String, ':');
 526          int    num, i;
 527
 528         if( !colon ) {
 529                 return NULL;
 530         }
 531
 532         num = atoi(colon+1);
 533         *colon = '\0';
 534
 535         // Find handler
 536         handler = NULL;
 537         for( i = 0; i < giNumHandlers; i ++ )
 538         {
 539                 if( strcmp(gaHandlers[i]->Name, type) == 0) {
 540                         handler = gaHandlers[i];
 541                         break;
 542                 }
 543         }
 544         if( !handler ) {
 545                 return NULL;
 546         }
 547
 548         // Find item
 549         for( i = 0; i < giNumItems; i ++ )
 550         {
 551                 if( gaItems[i].Handler != handler )     continue;
 552                 if( gaItems[i].ID != num )      continue;
 553                 return &gaItems[i];
 554         }
 555         return NULL;
 556 }
 557
 558 /**
 559  * \brief Fetch information on a specific item
 560  */
 561 void Server_Cmd_ITEMINFO(tClient *Client, char *Args)
 562 {
 563         tItem   *item;
 564         char    *itemname;
 565
 566         if( Server_int_ParseArgs(0, Args, &itemname, NULL) ) {
 567                 sendf(Client->Socket, "407 ITEMINFO takes 1 argument\n");
 568                 return ;
 569         }
 570         item = _GetItemFromString(Args);
 571
 572         if( !item ) {
 573                 sendf(Client->Socket, "406 Bad Item ID\n");
 574                 return ;
 575         }
 576
 577         sendf(Client->Socket,
 578                 "202 Item %s:%i %i %s\n",
 579                  item->Handler->Name, item->ID, item->Price, item->Name
 580                  );
 581 }
 582
 583 void Server_Cmd_DISPENSE(tClient *Client, char *Args)
 584 {
 585         tItem   *item;
 586          int    ret;
 587          int    uid;
 588         char    *itemname;
 589
 590         if( Server_int_ParseArgs(0, Args, &itemname, NULL) ) {
 591                 sendf(Client->Socket, "407 DISPENSE takes only 1 argument\n");
 592                 return ;
 593         }
 594
 595         if( !Client->bIsAuthed ) {
 596                 sendf(Client->Socket, "401 Not Authenticated\n");
 597                 return ;
 598         }
 599
 600         item = _GetItemFromString(itemname);
 601         if( !item ) {
 602                 sendf(Client->Socket, "406 Bad Item ID\n");
 603                 return ;
 604         }
 605
 606         if( Client->EffectiveUID != -1 ) {
 607                 uid = Client->EffectiveUID;
 608         }
 609         else {
 610                 uid = Client->UID;
 611         }
 612
 613         switch( ret = DispenseItem( Client->UID, uid, item ) )
 614         {
 615         case 0: sendf(Client->Socket, "200 Dispense OK\n");     return ;
 616         case 1: sendf(Client->Socket, "501 Unable to dispense\n");      return ;
 617         case 2: sendf(Client->Socket, "402 Poor You\n");        return ;
 618         default:
 619                 sendf(Client->Socket, "500 Dispense Error\n");
 620                 return ;
 621         }
 622 }
 623
 624 void Server_Cmd_GIVE(tClient *Client, char *Args)
 625 {
 626         char    *recipient, *ammount, *reason;
 627          int    uid, iAmmount;
 628          int    thisUid;
 629
 630         // Parse arguments
 631         if( Server_int_ParseArgs(1, Args, &recipient, &ammount, &reason, NULL) ) {
 632                 sendf(Client->Socket, "407 GIVE takes only 3 arguments\n");
 633                 return ;
 634         }
 635         // Check for authed
 636         if( !Client->bIsAuthed ) {
 637                 sendf(Client->Socket, "401 Not Authenticated\n");
 638                 return ;
 639         }
 640
 641         // Get recipient
 642         uid = Bank_GetAcctByName(recipient);
 643         if( uid == -1 ) {
 644                 sendf(Client->Socket, "404 Invalid target user\n");
 645                 return ;
 646         }
 647
 648         // You can't alter an internal account
 649         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 650                 sendf(Client->Socket, "404 Invalid target user\n");
 651                 return ;
 652         }
 653
 654         // Parse ammount
 655         iAmmount = atoi(ammount);
 656         if( iAmmount <= 0 ) {
 657                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 658                 return ;
 659         }
 660
 661         if( Client->EffectiveUID != -1 ) {
 662                 thisUid = Client->EffectiveUID;
 663         }
 664         else {
 665                 thisUid = Client->UID;
 666         }
 667
 668         // Do give
 669         switch( DispenseGive(Client->UID, thisUid, uid, iAmmount, reason) )
 670         {
 671         case 0:
 672                 sendf(Client->Socket, "200 Give OK\n");
 673                 return ;
 674         case 2:
 675                 sendf(Client->Socket, "402 Poor You\n");
 676                 return ;
 677         default:
 678                 sendf(Client->Socket, "500 Unknown error\n");
 679                 return ;
 680         }
 681 }
 682
 683 void Server_Cmd_DONATE(tClient *Client, char *Args)
 684 {
 685         char    *ammount, *reason;
 686          int    iAmmount;
 687          int    thisUid;
 688
 689         // Parse arguments
 690         if( Server_int_ParseArgs(1, Args, &ammount, &reason, NULL) ) {
 691                 sendf(Client->Socket, "407 DONATE takes 2 arguments\n");
 692                 return ;
 693         }
 694
 695         if( !Client->bIsAuthed ) {
 696                 sendf(Client->Socket, "401 Not Authenticated\n");
 697                 return ;
 698         }
 699
 700         // Parse ammount
 701         iAmmount = atoi(ammount);
 702         if( iAmmount <= 0 ) {
 703                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 704                 return ;
 705         }
 706
 707         // Handle effective users
 708         if( Client->EffectiveUID != -1 ) {
 709                 thisUid = Client->EffectiveUID;
 710         }
 711         else {
 712                 thisUid = Client->UID;
 713         }
 714
 715         // Do give
 716         switch( DispenseDonate(Client->UID, thisUid, iAmmount, reason) )
 717         {
 718         case 0:
 719                 sendf(Client->Socket, "200 Give OK\n");
 720                 return ;
 721         case 2:
 722                 sendf(Client->Socket, "402 Poor You\n");
 723                 return ;
 724         default:
 725                 sendf(Client->Socket, "500 Unknown error\n");
 726                 return ;
 727         }
 728 }
 729
 730 void Server_Cmd_ADD(tClient *Client, char *Args)
 731 {
 732         char    *user, *ammount, *reason;
 733          int    uid, iAmmount;
 734
 735         // Parse arguments
 736         if( Server_int_ParseArgs(1, Args, &user, &ammount, &reason, NULL) ) {
 737                 sendf(Client->Socket, "407 ADD takes 3 arguments\n");
 738                 return ;
 739         }
 740
 741         if( !Client->bIsAuthed ) {
 742                 sendf(Client->Socket, "401 Not Authenticated\n");
 743                 return ;
 744         }
 745
 746         // Check user permissions
 747         if( !(Bank_GetFlags(Client->UID) & (USER_FLAG_COKE|USER_FLAG_ADMIN))  ) {
 748                 sendf(Client->Socket, "403 Not in coke\n");
 749                 return ;
 750         }
 751
 752         // Get recipient
 753         uid = Bank_GetAcctByName(user);
 754         if( uid == -1 ) {
 755                 sendf(Client->Socket, "404 Invalid user\n");
 756                 return ;
 757         }
 758
 759         // You can't alter an internal account
 760         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 761                 sendf(Client->Socket, "404 Invalid user\n");
 762                 return ;
 763         }
 764
 765         // Parse ammount
 766         iAmmount = atoi(ammount);
 767         if( iAmmount == 0 && ammount[0] != '0' ) {
 768                 sendf(Client->Socket, "407 Invalid Argument\n");
 769                 return ;
 770         }
 771
 772         // Do give
 773         switch( DispenseAdd(Client->UID, uid, iAmmount, reason) )
 774         {
 775         case 0:
 776                 sendf(Client->Socket, "200 Add OK\n");
 777                 return ;
 778         case 2:
 779                 sendf(Client->Socket, "402 Poor Guy\n");
 780                 return ;
 781         default:
 782                 sendf(Client->Socket, "500 Unknown error\n");
 783                 return ;
 784         }
 785 }
 786
 787 void Server_Cmd_SET(tClient *Client, char *Args)
 788 {
 789         char    *user, *ammount, *reason;
 790          int    uid, iAmmount;
 791
 792         // Parse arguments
 793         if( Server_int_ParseArgs(1, Args, &user, &ammount, &reason, NULL) ) {
 794                 sendf(Client->Socket, "407 SET takes 3 arguments\n");
 795                 return ;
 796         }
 797
 798         if( !Client->bIsAuthed ) {
 799                 sendf(Client->Socket, "401 Not Authenticated\n");
 800                 return ;
 801         }
 802
 803         // Check user permissions
 804         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN)  ) {
 805                 sendf(Client->Socket, "403 Not an admin\n");
 806                 return ;
 807         }
 808
 809         // Get recipient
 810         uid = Bank_GetAcctByName(user);
 811         if( uid == -1 ) {
 812                 sendf(Client->Socket, "404 Invalid user\n");
 813                 return ;
 814         }
 815
 816         // You can't alter an internal account
 817         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 818                 sendf(Client->Socket, "404 Invalid user\n");
 819                 return ;
 820         }
 821
 822         // Parse ammount
 823         iAmmount = atoi(ammount);
 824         if( iAmmount == 0 && ammount[0] != '0' ) {
 825                 sendf(Client->Socket, "407 Invalid Argument\n");
 826                 return ;
 827         }
 828
 829         // Do give
 830         switch( DispenseSet(Client->UID, uid, iAmmount, reason) )
 831         {
 832         case 0:
 833                 sendf(Client->Socket, "200 Add OK\n");
 834                 return ;
 835         case 2:
 836                 sendf(Client->Socket, "402 Poor Guy\n");
 837                 return ;
 838         default:
 839                 sendf(Client->Socket, "500 Unknown error\n");
 840                 return ;
 841         }
 842 }
 843
 844 void Server_Cmd_ENUMUSERS(tClient *Client, char *Args)
 845 {
 846          int    i, numRet = 0;
 847         tAcctIterator   *it;
 848          int    maxBal = INT_MAX, minBal = INT_MIN;
 849          int    flagMask = 0, flagVal = 0;
 850          int    sort = BANK_ITFLAG_SORT_NAME;
 851         time_t  lastSeenAfter=0, lastSeenBefore=0;
 852
 853          int    flags;  // Iterator flags
 854          int    balValue;       // Balance value for iterator
 855         time_t  timeValue;      // Time value for iterator
 856
 857         // Parse arguments
 858         if( Args && strlen(Args) )
 859         {
 860                 char    *space = Args, *type, *val;
 861                 do
 862                 {
 863                         type = space;
 864                         while(*type == ' ')     type ++;
 865                         // Get next space
 866                         space = strchr(space, ' ');
 867                         if(space)       *space = '\0';
 868
 869                         // Get type
 870                         val = strchr(type, ':');
 871                         if( val ) {
 872                                 *val = '\0';
 873                                 val ++;
 874
 875                                 // Types
 876                                 // - Minium Balance
 877                                 if( strcmp(type, "min_balance") == 0 ) {
 878                                         minBal = atoi(val);
 879                                 }
 880                                 // - Maximum Balance
 881                                 else if( strcmp(type, "max_balance") == 0 ) {
 882                                         maxBal = atoi(val);
 883                                 }
 884                                 // - Flags
 885                                 else if( strcmp(type, "flags") == 0 ) {
 886                                         if( Server_int_ParseFlags(Client, val, &flagMask, &flagVal) )
 887                                                 return ;
 888                                 }
 889                                 // - Last seen before timestamp
 890                                 else if( strcmp(type, "last_seen_before") == 0 ) {
 891                                         lastSeenAfter = atoll(val);
 892                                 }
 893                                 // - Last seen after timestamp
 894                                 else if( strcmp(type, "last_seen_after") == 0 ) {
 895                                         lastSeenAfter = atoll(val);
 896                                 }
 897                                 // - Sorting
 898                                 else if( strcmp(type, "sort") == 0 ) {
 899                                         char    *dash = strchr(val, '-');
 900                                         if( dash ) {
 901                                                 *dash = '\0';
 902                                                 dash ++;
 903                                         }
 904                                         if( strcmp(val, "name") == 0 ) {
 905                                                 sort = BANK_ITFLAG_SORT_NAME;
 906                                         }
 907                                         else if( strcmp(val, "balance") == 0 ) {
 908                                                 sort = BANK_ITFLAG_SORT_BAL;
 909                                         }
 910                                         else if( strcmp(val, "lastseen") == 0 ) {
 911                                                 sort = BANK_ITFLAG_SORT_LASTSEEN;
 912                                         }
 913                                         else {
 914                                                 sendf(Client->Socket, "407 Unknown sort field ('%s')\n", val);
 915                                                 return ;
 916                                         }
 917                                         // Handle sort direction
 918                                         if( dash ) {
 919                                                 if( strcmp(dash, "desc") == 0 ) {
 920                                                         sort |= BANK_ITFLAG_REVSORT;
 921                                                 }
 922                                                 else {
 923                                                         sendf(Client->Socket, "407 Unknown sort direction '%s'\n", dash);
 924                                                         return ;
 925                                                 }
 926                                                 dash[-1] = '-';
 927                                         }
 928                                 }
 929                                 else {
 930                                         sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s:%s'\n", type, val);
 931                                         return ;
 932                                 }
 933
 934                                 val[-1] = ':';
 935                         }
 936                         else {
 937                                 sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s'\n", type);
 938                                 return ;
 939                         }
 940
 941                         // Eat whitespace
 942                         if( space ) {
 943                                 *space = ' ';   // Repair (to be nice)
 944                                 space ++;
 945                                 while(*space == ' ')    space ++;
 946                         }
 947                 }       while(space);
 948         }
 949
 950         // Create iterator
 951         if( maxBal != INT_MAX ) {
 952                 flags = sort|BANK_ITFLAG_MAXBALANCE;
 953                 balValue = maxBal;
 954         }
 955         else if( minBal != INT_MIN ) {
 956                 flags = sort|BANK_ITFLAG_MINBALANCE;
 957                 balValue = minBal;
 958         }
 959         else {
 960                 flags = sort;
 961                 balValue = 0;
 962         }
 963         if( lastSeenBefore ) {
 964                 timeValue = lastSeenBefore;
 965                 flags |= BANK_ITFLAG_SEENBEFORE;
 966         }
 967         else if( lastSeenAfter ) {
 968                 timeValue = lastSeenAfter;
 969                 flags |= BANK_ITFLAG_SEENAFTER;
 970         }
 971         else {
 972                 timeValue = 0;
 973         }
 974         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
 975
 976         // Get return number
 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                 numRet ++;
 987         }
 988
 989         Bank_DelIterator(it);
 990
 991         // Send count
 992         sendf(Client->Socket, "201 Users %i\n", numRet);
 993
 994
 995         // Create iterator
 996         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
 997
 998         while( (i = Bank_IteratorNext(it)) != -1 )
 999         {
1000                 int bal = Bank_GetBalance(i);
1001
1002                 if( bal == INT_MIN )    continue;
1003
1004                 if( bal < minBal )      continue;
1005                 if( bal > maxBal )      continue;
1006
1007                 _SendUserInfo(Client, i);
1008         }
1009
1010         Bank_DelIterator(it);
1011
1012         sendf(Client->Socket, "200 List End\n");
1013 }
1014
1015 void Server_Cmd_USERINFO(tClient *Client, char *Args)
1016 {
1017          int    uid;
1018         char    *user;
1019
1020         // Parse arguments
1021         if( Server_int_ParseArgs(0, Args, &user, NULL) ) {
1022                 sendf(Client->Socket, "407 USER_INFO takes 1 argument\n");
1023                 return ;
1024         }
1025
1026         if( giDebugLevel )      Debug(Client, "User Info '%s'", user);
1027
1028         // Get recipient
1029         uid = Bank_GetAcctByName(user);
1030
1031         if( giDebugLevel >= 2 ) Debug(Client, "uid = %i", uid);
1032         if( uid == -1 ) {
1033                 sendf(Client->Socket, "404 Invalid user\n");
1034                 return ;
1035         }
1036
1037         _SendUserInfo(Client, uid);
1038 }
1039
1040 void _SendUserInfo(tClient *Client, int UserID)
1041 {
1042         char    *type, *disabled="", *door="";
1043          int    flags = Bank_GetFlags(UserID);
1044
1045         if( flags & USER_FLAG_INTERNAL ) {
1046                 type = "internal";
1047         }
1048         else if( flags & USER_FLAG_COKE ) {
1049                 if( flags & USER_FLAG_ADMIN )
1050                         type = "coke,admin";
1051                 else
1052                         type = "coke";
1053         }
1054         else if( flags & USER_FLAG_ADMIN ) {
1055                 type = "admin";
1056         }
1057         else {
1058                 type = "user";
1059         }
1060
1061         if( flags & USER_FLAG_DISABLED )
1062                 disabled = ",disabled";
1063         if( flags & USER_FLAG_DOORGROUP )
1064                 door = ",door";
1065
1066         // TODO: User flags/type
1067         sendf(
1068                 Client->Socket, "202 User %s %i %s%s%s\n",
1069                 Bank_GetAcctName(UserID), Bank_GetBalance(UserID),
1070                 type, disabled, door
1071                 );
1072 }
1073
1074 void Server_Cmd_USERADD(tClient *Client, char *Args)
1075 {
1076         char    *username;
1077
1078         // Parse arguments
1079         if( Server_int_ParseArgs(0, Args, &username, NULL) ) {
1080                 sendf(Client->Socket, "407 USER_ADD takes 1 argument\n");
1081                 return ;
1082         }
1083
1084         // Check permissions
1085         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1086                 sendf(Client->Socket, "403 Not a coke admin\n");
1087                 return ;
1088         }
1089
1090         // Try to create user
1091         if( Bank_CreateAcct(username) == -1 ) {
1092                 sendf(Client->Socket, "404 User exists\n");
1093                 return ;
1094         }
1095
1096         {
1097                 char    *thisName = Bank_GetAcctName(Client->UID);
1098                 Log_Info("Account '%s' created by '%s'", username, thisName);
1099                 free(thisName);
1100         }
1101
1102         sendf(Client->Socket, "200 User Added\n");
1103 }
1104
1105 void Server_Cmd_USERFLAGS(tClient *Client, char *Args)
1106 {
1107         char    *username, *flags;
1108          int    mask=0, value=0;
1109          int    uid;
1110
1111         // Parse arguments
1112         if( Server_int_ParseArgs(0, Args, &username, &flags, NULL) ) {
1113                 sendf(Client->Socket, "407 USER_FLAGS takes 2 arguments\n");
1114                 return ;
1115         }
1116
1117         // Check permissions
1118         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1119                 sendf(Client->Socket, "403 Not a coke admin\n");
1120                 return ;
1121         }
1122
1123         // Get UID
1124         uid = Bank_GetAcctByName(username);
1125         if( uid == -1 ) {
1126                 sendf(Client->Socket, "404 User '%s' not found\n", username);
1127                 return ;
1128         }
1129
1130         // Parse flags
1131         if( Server_int_ParseFlags(Client, flags, &mask, &value) )
1132                 return ;
1133
1134         if( giDebugLevel )
1135                 Debug(Client, "Set %i(%s) flags to %x (masked %x)\n",
1136                         uid, username, mask, value);
1137
1138         // Apply flags
1139         Bank_SetFlags(uid, mask, value);
1140
1141         // Return OK
1142         sendf(Client->Socket, "200 User Updated\n");
1143 }
1144
1145 // --- INTERNAL HELPERS ---
1146 void Debug(tClient *Client, const char *Format, ...)
1147 {
1148         va_list args;
1149         //printf("%010i [%i] ", (int)time(NULL), Client->ID);
1150         printf("[%i] ", Client->ID);
1151         va_start(args, Format);
1152         vprintf(Format, args);
1153         va_end(args);
1154         printf("\n");
1155 }
1156
1157 int sendf(int Socket, const char *Format, ...)
1158 {
1159         va_list args;
1160          int    len;
1161
1162         va_start(args, Format);
1163         len = vsnprintf(NULL, 0, Format, args);
1164         va_end(args);
1165
1166         {
1167                 char    buf[len+1];
1168                 va_start(args, Format);
1169                 vsnprintf(buf, len+1, Format, args);
1170                 va_end(args);
1171
1172                 #if DEBUG_TRACE_CLIENT
1173                 printf("sendf: %s", buf);
1174                 #endif
1175
1176                 return send(Socket, buf, len, 0);
1177         }
1178 }
1179
1180 // Takes a series of char *'s in
1181 /**
1182  * \brief Parse space-separated entries into
1183  */
1184 int Server_int_ParseArgs(int bUseLongLast, char *ArgStr, ...)
1185 {
1186         va_list args;
1187         char    savedChar;
1188         char    **dest;
1189         va_start(args, ArgStr);
1190
1191         // Check for null
1192         if( !ArgStr )
1193         {
1194                 while( (dest = va_arg(args, char **)) )
1195                         *dest = NULL;
1196                 va_end(args);
1197                 return 1;
1198         }
1199
1200         savedChar = *ArgStr;
1201
1202         while( (dest = va_arg(args, char **)) )
1203         {
1204                 printf(" dest = %p\n", dest);
1205                 // Trim leading spaces
1206                 while( *ArgStr == ' ' || *ArgStr == '\t' )
1207                         ArgStr ++;
1208
1209                 // ... oops, not enough arguments
1210                 if( *ArgStr == '\0' )
1211                 {
1212                         // NULL unset arguments
1213                         do {
1214                                 *dest = NULL;
1215                         }       while( (dest = va_arg(args, char **)) );
1216                 va_end(args);
1217                         return -1;
1218                 }
1219
1220                 if( *ArgStr == '"' )
1221                 {
1222                         ArgStr ++;
1223                         *dest = ArgStr;
1224                         // Read until quote
1225                         while( *ArgStr && *ArgStr != '"' )
1226                                 ArgStr ++;
1227                 }
1228                 else
1229                 {
1230                         // Set destination
1231                         *dest = ArgStr;
1232                         // Read until a space
1233                         while( *ArgStr && *ArgStr != ' ' && *ArgStr != '\t' )
1234                                 ArgStr ++;
1235                 }
1236                 savedChar = *ArgStr;    // savedChar is used to un-mangle the last string
1237                 *ArgStr = '\0';
1238                 ArgStr ++;
1239         }
1240         va_end(args);
1241
1242         // Oops, extra arguments, and greedy not set
1243         if( (savedChar == ' ' || savedChar == '\t') && !bUseLongLast ) {
1244                 return -1;
1245         }
1246
1247         // Un-mangle last
1248         if(bUseLongLast) {
1249                 ArgStr --;
1250                 *ArgStr = savedChar;
1251         }
1252
1253         return 0;       // Success!
1254 }
1255
1256 int Server_int_ParseFlags(tClient *Client, const char *Str, int *Mask, int *Value)
1257 {
1258         struct {
1259                 const char      *Name;
1260                  int    Mask;
1261                  int    Value;
1262         }       cFLAGS[] = {
1263                  {"disabled", USER_FLAG_DISABLED, USER_FLAG_DISABLED}
1264                 ,{"door", USER_FLAG_DOORGROUP, USER_FLAG_DOORGROUP}
1265                 ,{"coke", USER_FLAG_COKE, USER_FLAG_COKE}
1266                 ,{"admin", USER_FLAG_ADMIN, USER_FLAG_ADMIN}
1267                 ,{"internal", USER_FLAG_INTERNAL, USER_FLAG_INTERNAL}
1268         };
1269         const int       ciNumFlags = sizeof(cFLAGS)/sizeof(cFLAGS[0]);
1270
1271         char    *space;
1272
1273         *Mask = 0;
1274         *Value = 0;
1275
1276         do {
1277                  int    bRemove = 0;
1278                  int    i;
1279                  int    len;
1280
1281                 while( *Str == ' ' )    Str ++; // Eat whitespace
1282                 space = strchr(Str, ',');       // Find the end of the flag
1283                 if(space)
1284                         len = space - Str;
1285                 else
1286                         len = strlen(Str);
1287
1288                 // Check for inversion/removal
1289                 if( *Str == '!' || *Str == '-' ) {
1290                         bRemove = 1;
1291                         Str ++;
1292                 }
1293                 else if( *Str == '+' ) {
1294                         Str ++;
1295                 }
1296
1297                 // Check flag values
1298                 for( i = 0; i < ciNumFlags; i ++ )
1299                 {
1300                         if( strncmp(Str, cFLAGS[i].Name, len) == 0 ) {
1301                                 *Mask |= cFLAGS[i].Mask;
1302                                 *Value &= ~cFLAGS[i].Mask;
1303                                 if( !bRemove )
1304                                         *Value |= cFLAGS[i].Value;
1305                                 break;
1306                         }
1307                 }
1308
1309                 // Error check
1310                 if( i == ciNumFlags ) {
1311                         char    val[len+1];
1312                         strncpy(val, Str, len+1);
1313                         sendf(Client->Socket, "407 Unknown flag value '%s'\n", val);
1314                         return -1;
1315                 }
1316
1317                 Str = space + 1;
1318         } while(space);
1319
1320         return 0;
1321 }