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
 300         if( giDebugLevel >= 2 )
 301                 Debug(Client, "Server_ParseClientCommand: (CommandString = '%s')", CommandString);
 302
 303         if( Server_int_ParseArgs(1, CommandString, &command, &args, NULL) )
 304         {
 305                 // Is this an error? (just ignore for now)
 306                 //args = "";
 307         }
 308
 309
 310         // Find command
 311         for( i = 0; i < NUM_COMMANDS; i++ )
 312         {
 313                 if(strcmp(command, gaServer_Commands[i].Name) == 0) {
 314                         if( giDebugLevel >= 2 )
 315                                 Debug(Client, "CMD %s - \"%s\"", command, args);
 316                         gaServer_Commands[i].Function(Client, args);
 317                         return ;
 318                 }
 319         }
 320
 321         sendf(Client->Socket, "400 Unknown Command\n");
 322 }
 323
 324 // ---
 325 // Commands
 326 // ---
 327 /**
 328  * \brief Set client username
 329  *
 330  * Usage: USER <username>
 331  */
 332 void Server_Cmd_USER(tClient *Client, char *Args)
 333 {
 334         char    *username;
 335
 336         Server_int_ParseArgs(0, Args, &username, NULL);
 337
 338         // Debug!
 339         if( giDebugLevel )
 340                 Debug(Client, "Authenticating as '%s'", username);
 341
 342         // Save username
 343         if(Client->Username)
 344                 free(Client->Username);
 345         Client->Username = strdup(username);
 346
 347         #if USE_SALT
 348         // Create a salt (that changes if the username is changed)
 349         // Yes, I know, I'm a little paranoid, but who isn't?
 350         Client->Salt[0] = 0x21 + (rand()&0x3F);
 351         Client->Salt[1] = 0x21 + (rand()&0x3F);
 352         Client->Salt[2] = 0x21 + (rand()&0x3F);
 353         Client->Salt[3] = 0x21 + (rand()&0x3F);
 354         Client->Salt[4] = 0x21 + (rand()&0x3F);
 355         Client->Salt[5] = 0x21 + (rand()&0x3F);
 356         Client->Salt[6] = 0x21 + (rand()&0x3F);
 357         Client->Salt[7] = 0x21 + (rand()&0x3F);
 358
 359         // TODO: Also send hash type to use, (SHA1 or crypt according to [DAA])
 360         sendf(Client->Socket, "100 SALT %s\n", Client->Salt);
 361         #else
 362         sendf(Client->Socket, "100 User Set\n");
 363         #endif
 364 }
 365
 366 /**
 367  * \brief Authenticate as a user
 368  *
 369  * Usage: PASS <hash>
 370  */
 371 void Server_Cmd_PASS(tClient *Client, char *Args)
 372 {
 373         char    *passhash;
 374
 375         Server_int_ParseArgs(0, Args, &passhash, NULL);
 376
 377         // Pass on to cokebank
 378         Client->UID = Bank_GetUserAuth(Client->Salt, Client->Username, passhash);
 379
 380         if( Client->UID != -1 ) {
 381                 Client->bIsAuthed = 1;
 382                 sendf(Client->Socket, "200 Auth OK\n");
 383                 return ;
 384         }
 385
 386         sendf(Client->Socket, "401 Auth Failure\n");
 387 }
 388
 389 /**
 390  * \brief Authenticate as a user without a password
 391  *
 392  * Usage: AUTOAUTH <user>
 393  */
 394 void Server_Cmd_AUTOAUTH(tClient *Client, char *Args)
 395 {
 396         char    *username;
 397
 398         if( Server_int_ParseArgs(0, Args, &username, NULL) )
 399         {
 400                 sendf(Client->Socket, "407 AUTOAUTH takes 1 argument\n");
 401                 return ;
 402         }
 403
 404         // Check if trusted
 405         if( !Client->bIsTrusted ) {
 406                 if(giDebugLevel)
 407                         Debug(Client, "Untrusted client attempting to AUTOAUTH");
 408                 sendf(Client->Socket, "401 Untrusted\n");
 409                 return ;
 410         }
 411
 412         // Get UID
 413         Client->UID = Bank_GetAcctByName( username );
 414         if( Client->UID < 0 ) {
 415                 if(giDebugLevel)
 416                         Debug(Client, "Unknown user '%s'", username);
 417                 sendf(Client->Socket, "401 Auth Failure\n");
 418                 return ;
 419         }
 420
 421         // You can't be an internal account
 422         if( Bank_GetFlags(Client->UID) & USER_FLAG_INTERNAL ) {
 423                 if(giDebugLevel)
 424                         Debug(Client, "Autoauth as '%s', not allowed", username);
 425                 Client->UID = -1;
 426                 sendf(Client->Socket, "401 Auth Failure\n");
 427                 return ;
 428         }
 429
 430         Client->bIsAuthed = 1;
 431
 432         if(giDebugLevel)
 433                 Debug(Client, "Auto authenticated as '%s' (%i)", username, Client->UID);
 434
 435         sendf(Client->Socket, "200 Auth OK\n");
 436 }
 437
 438 /**
 439  * \brief Set effective user
 440  */
 441 void Server_Cmd_SETEUSER(tClient *Client, char *Args)
 442 {
 443         char    *username;
 444
 445         Server_int_ParseArgs(0, Args, &username, NULL);
 446
 447         if( !strlen(Args) ) {
 448                 sendf(Client->Socket, "407 SETEUSER expects an argument\n");
 449                 return ;
 450         }
 451
 452         // Check user permissions
 453         if( !(Bank_GetFlags(Client->UID) & (USER_FLAG_COKE|USER_FLAG_ADMIN)) ) {
 454                 sendf(Client->Socket, "403 Not in coke\n");
 455                 return ;
 456         }
 457
 458         // Set id
 459         Client->EffectiveUID = Bank_GetAcctByName(username);
 460         if( Client->EffectiveUID == -1 ) {
 461                 sendf(Client->Socket, "404 User not found\n");
 462                 return ;
 463         }
 464
 465         // You can't be an internal account
 466         if( Bank_GetFlags(Client->EffectiveUID) & USER_FLAG_INTERNAL ) {
 467                 Client->EffectiveUID = -1;
 468                 sendf(Client->Socket, "404 User not found\n");
 469                 return ;
 470         }
 471
 472         sendf(Client->Socket, "200 User set\n");
 473 }
 474
 475 /**
 476  * \brief Enumerate the items that the server knows about
 477  */
 478 void Server_Cmd_ENUMITEMS(tClient *Client, char *Args)
 479 {
 480          int    i, count;
 481
 482         if( Args != NULL && strlen(Args) ) {
 483                 sendf(Client->Socket, "407 ENUM_ITEMS takes no arguments\n");
 484                 return ;
 485         }
 486
 487         // Count shown items
 488         count = 0;
 489         for( i = 0; i < giNumItems; i ++ ) {
 490                 if( gaItems[i].bHidden )        continue;
 491                 count ++;
 492         }
 493
 494         sendf(Client->Socket, "201 Items %i\n", count);
 495
 496         for( i = 0; i < giNumItems; i ++ ) {
 497                 if( gaItems[i].bHidden )        continue;
 498                 sendf(Client->Socket,
 499                         "202 Item %s:%i %i %s\n",
 500                          gaItems[i].Handler->Name, gaItems[i].ID, gaItems[i].Price, gaItems[i].Name
 501                          );
 502         }
 503
 504         sendf(Client->Socket, "200 List end\n");
 505 }
 506
 507 tItem *_GetItemFromString(char *String)
 508 {
 509         tHandler        *handler;
 510         char    *type = String;
 511         char    *colon = strchr(String, ':');
 512          int    num, i;
 513
 514         if( !colon ) {
 515                 return NULL;
 516         }
 517
 518         num = atoi(colon+1);
 519         *colon = '\0';
 520
 521         // Find handler
 522         handler = NULL;
 523         for( i = 0; i < giNumHandlers; i ++ )
 524         {
 525                 if( strcmp(gaHandlers[i]->Name, type) == 0) {
 526                         handler = gaHandlers[i];
 527                         break;
 528                 }
 529         }
 530         if( !handler ) {
 531                 return NULL;
 532         }
 533
 534         // Find item
 535         for( i = 0; i < giNumItems; i ++ )
 536         {
 537                 if( gaItems[i].Handler != handler )     continue;
 538                 if( gaItems[i].ID != num )      continue;
 539                 return &gaItems[i];
 540         }
 541         return NULL;
 542 }
 543
 544 /**
 545  * \brief Fetch information on a specific item
 546  */
 547 void Server_Cmd_ITEMINFO(tClient *Client, char *Args)
 548 {
 549         tItem   *item;
 550         char    *itemname;
 551
 552         if( Server_int_ParseArgs(0, Args, &itemname, NULL) ) {
 553                 sendf(Client->Socket, "407 ITEMINFO takes 1 argument\n");
 554                 return ;
 555         }
 556         item = _GetItemFromString(Args);
 557
 558         if( !item ) {
 559                 sendf(Client->Socket, "406 Bad Item ID\n");
 560                 return ;
 561         }
 562
 563         sendf(Client->Socket,
 564                 "202 Item %s:%i %i %s\n",
 565                  item->Handler->Name, item->ID, item->Price, item->Name
 566                  );
 567 }
 568
 569 void Server_Cmd_DISPENSE(tClient *Client, char *Args)
 570 {
 571         tItem   *item;
 572          int    ret;
 573          int    uid;
 574         char    *itemname;
 575
 576         if( Server_int_ParseArgs(0, Args, &itemname, NULL) ) {
 577                 sendf(Client->Socket, "407 DISPENSE takes only 1 argument\n");
 578                 return ;
 579         }
 580
 581         if( !Client->bIsAuthed ) {
 582                 sendf(Client->Socket, "401 Not Authenticated\n");
 583                 return ;
 584         }
 585
 586         item = _GetItemFromString(itemname);
 587         if( !item ) {
 588                 sendf(Client->Socket, "406 Bad Item ID\n");
 589                 return ;
 590         }
 591
 592         if( Client->EffectiveUID != -1 ) {
 593                 uid = Client->EffectiveUID;
 594         }
 595         else {
 596                 uid = Client->UID;
 597         }
 598
 599         switch( ret = DispenseItem( Client->UID, uid, item ) )
 600         {
 601         case 0: sendf(Client->Socket, "200 Dispense OK\n");     return ;
 602         case 1: sendf(Client->Socket, "501 Unable to dispense\n");      return ;
 603         case 2: sendf(Client->Socket, "402 Poor You\n");        return ;
 604         default:
 605                 sendf(Client->Socket, "500 Dispense Error\n");
 606                 return ;
 607         }
 608 }
 609
 610 void Server_Cmd_GIVE(tClient *Client, char *Args)
 611 {
 612         char    *recipient, *ammount, *reason;
 613          int    uid, iAmmount;
 614          int    thisUid;
 615
 616         // Parse arguments
 617         if( Server_int_ParseArgs(1, Args, &recipient, &ammount, &reason, NULL) ) {
 618                 sendf(Client->Socket, "407 GIVE takes only 3 arguments\n");
 619                 return ;
 620         }
 621         // Check for authed
 622         if( !Client->bIsAuthed ) {
 623                 sendf(Client->Socket, "401 Not Authenticated\n");
 624                 return ;
 625         }
 626
 627         // Get recipient
 628         uid = Bank_GetAcctByName(recipient);
 629         if( uid == -1 ) {
 630                 sendf(Client->Socket, "404 Invalid target user\n");
 631                 return ;
 632         }
 633
 634         // You can't alter an internal account
 635         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 636                 sendf(Client->Socket, "404 Invalid target user\n");
 637                 return ;
 638         }
 639
 640         // Parse ammount
 641         iAmmount = atoi(ammount);
 642         if( iAmmount <= 0 ) {
 643                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 644                 return ;
 645         }
 646
 647         if( Client->EffectiveUID != -1 ) {
 648                 thisUid = Client->EffectiveUID;
 649         }
 650         else {
 651                 thisUid = Client->UID;
 652         }
 653
 654         // Do give
 655         switch( DispenseGive(Client->UID, thisUid, uid, iAmmount, reason) )
 656         {
 657         case 0:
 658                 sendf(Client->Socket, "200 Give OK\n");
 659                 return ;
 660         case 2:
 661                 sendf(Client->Socket, "402 Poor You\n");
 662                 return ;
 663         default:
 664                 sendf(Client->Socket, "500 Unknown error\n");
 665                 return ;
 666         }
 667 }
 668
 669 void Server_Cmd_DONATE(tClient *Client, char *Args)
 670 {
 671         char    *ammount, *reason;
 672          int    iAmmount;
 673          int    thisUid;
 674
 675         // Parse arguments
 676         if( Server_int_ParseArgs(1, Args, &ammount, &reason, NULL) ) {
 677                 sendf(Client->Socket, "407 DONATE takes 2 arguments\n");
 678                 return ;
 679         }
 680
 681         if( !Client->bIsAuthed ) {
 682                 sendf(Client->Socket, "401 Not Authenticated\n");
 683                 return ;
 684         }
 685
 686         // Parse ammount
 687         iAmmount = atoi(ammount);
 688         if( iAmmount <= 0 ) {
 689                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 690                 return ;
 691         }
 692
 693         // Handle effective users
 694         if( Client->EffectiveUID != -1 ) {
 695                 thisUid = Client->EffectiveUID;
 696         }
 697         else {
 698                 thisUid = Client->UID;
 699         }
 700
 701         // Do give
 702         switch( DispenseDonate(Client->UID, thisUid, iAmmount, reason) )
 703         {
 704         case 0:
 705                 sendf(Client->Socket, "200 Give OK\n");
 706                 return ;
 707         case 2:
 708                 sendf(Client->Socket, "402 Poor You\n");
 709                 return ;
 710         default:
 711                 sendf(Client->Socket, "500 Unknown error\n");
 712                 return ;
 713         }
 714 }
 715
 716 void Server_Cmd_ADD(tClient *Client, char *Args)
 717 {
 718         char    *user, *ammount, *reason;
 719          int    uid, iAmmount;
 720
 721         // Parse arguments
 722         if( Server_int_ParseArgs(1, Args, &user, &ammount, &reason, NULL) ) {
 723                 sendf(Client->Socket, "407 ADD takes 3 arguments\n");
 724                 return ;
 725         }
 726
 727         if( !Client->bIsAuthed ) {
 728                 sendf(Client->Socket, "401 Not Authenticated\n");
 729                 return ;
 730         }
 731
 732         // Check user permissions
 733         if( !(Bank_GetFlags(Client->UID) & (USER_FLAG_COKE|USER_FLAG_ADMIN))  ) {
 734                 sendf(Client->Socket, "403 Not in coke\n");
 735                 return ;
 736         }
 737
 738         // Get recipient
 739         uid = Bank_GetAcctByName(user);
 740         if( uid == -1 ) {
 741                 sendf(Client->Socket, "404 Invalid user\n");
 742                 return ;
 743         }
 744
 745         // You can't alter an internal account
 746         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 747                 sendf(Client->Socket, "404 Invalid user\n");
 748                 return ;
 749         }
 750
 751         // Parse ammount
 752         iAmmount = atoi(ammount);
 753         if( iAmmount == 0 && ammount[0] != '0' ) {
 754                 sendf(Client->Socket, "407 Invalid Argument\n");
 755                 return ;
 756         }
 757
 758         // Do give
 759         switch( DispenseAdd(Client->UID, uid, iAmmount, reason) )
 760         {
 761         case 0:
 762                 sendf(Client->Socket, "200 Add OK\n");
 763                 return ;
 764         case 2:
 765                 sendf(Client->Socket, "402 Poor Guy\n");
 766                 return ;
 767         default:
 768                 sendf(Client->Socket, "500 Unknown error\n");
 769                 return ;
 770         }
 771 }
 772
 773 void Server_Cmd_SET(tClient *Client, char *Args)
 774 {
 775         char    *user, *ammount, *reason;
 776          int    uid, iAmmount;
 777
 778         // Parse arguments
 779         if( Server_int_ParseArgs(1, Args, &user, &ammount, &reason, NULL) ) {
 780                 sendf(Client->Socket, "407 SET takes 3 arguments\n");
 781                 return ;
 782         }
 783
 784         if( !Client->bIsAuthed ) {
 785                 sendf(Client->Socket, "401 Not Authenticated\n");
 786                 return ;
 787         }
 788
 789         // Check user permissions
 790         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN)  ) {
 791                 sendf(Client->Socket, "403 Not an admin\n");
 792                 return ;
 793         }
 794
 795         // Get recipient
 796         uid = Bank_GetAcctByName(user);
 797         if( uid == -1 ) {
 798                 sendf(Client->Socket, "404 Invalid user\n");
 799                 return ;
 800         }
 801
 802         // You can't alter an internal account
 803         if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 804                 sendf(Client->Socket, "404 Invalid user\n");
 805                 return ;
 806         }
 807
 808         // Parse ammount
 809         iAmmount = atoi(ammount);
 810         if( iAmmount == 0 && ammount[0] != '0' ) {
 811                 sendf(Client->Socket, "407 Invalid Argument\n");
 812                 return ;
 813         }
 814
 815         // Do give
 816         switch( DispenseSet(Client->UID, uid, iAmmount, reason) )
 817         {
 818         case 0:
 819                 sendf(Client->Socket, "200 Add OK\n");
 820                 return ;
 821         case 2:
 822                 sendf(Client->Socket, "402 Poor Guy\n");
 823                 return ;
 824         default:
 825                 sendf(Client->Socket, "500 Unknown error\n");
 826                 return ;
 827         }
 828 }
 829
 830 void Server_Cmd_ENUMUSERS(tClient *Client, char *Args)
 831 {
 832          int    i, numRet = 0;
 833         tAcctIterator   *it;
 834          int    maxBal = INT_MAX, minBal = INT_MIN;
 835          int    flagMask = 0, flagVal = 0;
 836          int    sort = BANK_ITFLAG_SORT_NAME;
 837         time_t  lastSeenAfter=0, lastSeenBefore=0;
 838
 839          int    flags;  // Iterator flags
 840          int    balValue;       // Balance value for iterator
 841         time_t  timeValue;      // Time value for iterator
 842
 843         // Parse arguments
 844         if( Args && strlen(Args) )
 845         {
 846                 char    *space = Args, *type, *val;
 847                 do
 848                 {
 849                         type = space;
 850                         while(*type == ' ')     type ++;
 851                         // Get next space
 852                         space = strchr(space, ' ');
 853                         if(space)       *space = '\0';
 854
 855                         // Get type
 856                         val = strchr(type, ':');
 857                         if( val ) {
 858                                 *val = '\0';
 859                                 val ++;
 860
 861                                 // Types
 862                                 // - Minium Balance
 863                                 if( strcmp(type, "min_balance") == 0 ) {
 864                                         minBal = atoi(val);
 865                                 }
 866                                 // - Maximum Balance
 867                                 else if( strcmp(type, "max_balance") == 0 ) {
 868                                         maxBal = atoi(val);
 869                                 }
 870                                 // - Flags
 871                                 else if( strcmp(type, "flags") == 0 ) {
 872                                         if( Server_int_ParseFlags(Client, val, &flagMask, &flagVal) )
 873                                                 return ;
 874                                 }
 875                                 // - Last seen before timestamp
 876                                 else if( strcmp(type, "last_seen_before") == 0 ) {
 877                                         lastSeenAfter = atoll(val);
 878                                 }
 879                                 // - Last seen after timestamp
 880                                 else if( strcmp(type, "last_seen_after") == 0 ) {
 881                                         lastSeenAfter = atoll(val);
 882                                 }
 883                                 // - Sorting
 884                                 else if( strcmp(type, "sort") == 0 ) {
 885                                         char    *dash = strchr(val, '-');
 886                                         if( dash ) {
 887                                                 *dash = '\0';
 888                                                 dash ++;
 889                                         }
 890                                         if( strcmp(val, "name") == 0 ) {
 891                                                 sort = BANK_ITFLAG_SORT_NAME;
 892                                         }
 893                                         else if( strcmp(val, "balance") == 0 ) {
 894                                                 sort = BANK_ITFLAG_SORT_BAL;
 895                                         }
 896                                         else if( strcmp(val, "lastseen") == 0 ) {
 897                                                 sort = BANK_ITFLAG_SORT_LASTSEEN;
 898                                         }
 899                                         else {
 900                                                 sendf(Client->Socket, "407 Unknown sort field ('%s')\n", val);
 901                                                 return ;
 902                                         }
 903                                         // Handle sort direction
 904                                         if( dash ) {
 905                                                 if( strcmp(dash, "desc") == 0 ) {
 906                                                         sort |= BANK_ITFLAG_REVSORT;
 907                                                 }
 908                                                 else {
 909                                                         sendf(Client->Socket, "407 Unknown sort direction '%s'\n", dash);
 910                                                         return ;
 911                                                 }
 912                                                 dash[-1] = '-';
 913                                         }
 914                                 }
 915                                 else {
 916                                         sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s:%s'\n", type, val);
 917                                         return ;
 918                                 }
 919
 920                                 val[-1] = ':';
 921                         }
 922                         else {
 923                                 sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s'\n", type);
 924                                 return ;
 925                         }
 926
 927                         // Eat whitespace
 928                         if( space ) {
 929                                 *space = ' ';   // Repair (to be nice)
 930                                 space ++;
 931                                 while(*space == ' ')    space ++;
 932                         }
 933                 }       while(space);
 934         }
 935
 936         // Create iterator
 937         if( maxBal != INT_MAX ) {
 938                 flags = sort|BANK_ITFLAG_MAXBALANCE;
 939                 balValue = maxBal;
 940         }
 941         else if( minBal != INT_MIN ) {
 942                 flags = sort|BANK_ITFLAG_MINBALANCE;
 943                 balValue = minBal;
 944         }
 945         else {
 946                 flags = sort;
 947                 balValue = 0;
 948         }
 949         if( lastSeenBefore ) {
 950                 timeValue = lastSeenBefore;
 951                 flags |= BANK_ITFLAG_SEENBEFORE;
 952         }
 953         else if( lastSeenAfter ) {
 954                 timeValue = lastSeenAfter;
 955                 flags |= BANK_ITFLAG_SEENAFTER;
 956         }
 957         else {
 958                 timeValue = 0;
 959         }
 960         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
 961
 962         // Get return number
 963         while( (i = Bank_IteratorNext(it)) != -1 )
 964         {
 965                 int bal = Bank_GetBalance(i);
 966
 967                 if( bal == INT_MIN )    continue;
 968
 969                 if( bal < minBal )      continue;
 970                 if( bal > maxBal )      continue;
 971
 972                 numRet ++;
 973         }
 974
 975         Bank_DelIterator(it);
 976
 977         // Send count
 978         sendf(Client->Socket, "201 Users %i\n", numRet);
 979
 980
 981         // Create iterator
 982         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
 983
 984         while( (i = Bank_IteratorNext(it)) != -1 )
 985         {
 986                 int bal = Bank_GetBalance(i);
 987
 988                 if( bal == INT_MIN )    continue;
 989
 990                 if( bal < minBal )      continue;
 991                 if( bal > maxBal )      continue;
 992
 993                 _SendUserInfo(Client, i);
 994         }
 995
 996         Bank_DelIterator(it);
 997
 998         sendf(Client->Socket, "200 List End\n");
 999 }
1000
1001 void Server_Cmd_USERINFO(tClient *Client, char *Args)
1002 {
1003          int    uid;
1004         char    *user;
1005
1006         // Parse arguments
1007         if( Server_int_ParseArgs(0, Args, &user, NULL) ) {
1008                 sendf(Client->Socket, "407 USER_INFO takes 1 argument\n");
1009                 return ;
1010         }
1011
1012         if( giDebugLevel )      Debug(Client, "User Info '%s'", user);
1013
1014         // Get recipient
1015         uid = Bank_GetAcctByName(user);
1016
1017         if( giDebugLevel >= 2 ) Debug(Client, "uid = %i", uid);
1018         if( uid == -1 ) {
1019                 sendf(Client->Socket, "404 Invalid user\n");
1020                 return ;
1021         }
1022
1023         _SendUserInfo(Client, uid);
1024 }
1025
1026 void _SendUserInfo(tClient *Client, int UserID)
1027 {
1028         char    *type, *disabled="", *door="";
1029          int    flags = Bank_GetFlags(UserID);
1030
1031         if( flags & USER_FLAG_INTERNAL ) {
1032                 type = "internal";
1033         }
1034         else if( flags & USER_FLAG_COKE ) {
1035                 if( flags & USER_FLAG_ADMIN )
1036                         type = "coke,admin";
1037                 else
1038                         type = "coke";
1039         }
1040         else if( flags & USER_FLAG_ADMIN ) {
1041                 type = "admin";
1042         }
1043         else {
1044                 type = "user";
1045         }
1046
1047         if( flags & USER_FLAG_DISABLED )
1048                 disabled = ",disabled";
1049         if( flags & USER_FLAG_DOORGROUP )
1050                 door = ",door";
1051
1052         // TODO: User flags/type
1053         sendf(
1054                 Client->Socket, "202 User %s %i %s%s%s\n",
1055                 Bank_GetAcctName(UserID), Bank_GetBalance(UserID),
1056                 type, disabled, door
1057                 );
1058 }
1059
1060 void Server_Cmd_USERADD(tClient *Client, char *Args)
1061 {
1062         char    *username;
1063
1064         // Parse arguments
1065         if( Server_int_ParseArgs(0, Args, &username, NULL) ) {
1066                 sendf(Client->Socket, "407 USER_ADD takes 1 argument\n");
1067                 return ;
1068         }
1069
1070         // Check permissions
1071         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1072                 sendf(Client->Socket, "403 Not a coke admin\n");
1073                 return ;
1074         }
1075
1076         // Try to create user
1077         if( Bank_CreateAcct(username) == -1 ) {
1078                 sendf(Client->Socket, "404 User exists\n");
1079                 return ;
1080         }
1081
1082         {
1083                 char    *thisName = Bank_GetAcctName(Client->UID);
1084                 Log_Info("Account '%s' created by '%s'", username, thisName);
1085                 free(thisName);
1086         }
1087
1088         sendf(Client->Socket, "200 User Added\n");
1089 }
1090
1091 void Server_Cmd_USERFLAGS(tClient *Client, char *Args)
1092 {
1093         char    *username, *flags;
1094          int    mask=0, value=0;
1095          int    uid;
1096
1097         // Parse arguments
1098         if( Server_int_ParseArgs(0, Args, &username, &flags, NULL) ) {
1099                 sendf(Client->Socket, "407 USER_FLAGS takes 2 arguments\n");
1100                 return ;
1101         }
1102
1103         // Check permissions
1104         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1105                 sendf(Client->Socket, "403 Not a coke admin\n");
1106                 return ;
1107         }
1108
1109         // Get UID
1110         uid = Bank_GetAcctByName(username);
1111         if( uid == -1 ) {
1112                 sendf(Client->Socket, "404 User '%s' not found\n", username);
1113                 return ;
1114         }
1115
1116         // Parse flags
1117         if( Server_int_ParseFlags(Client, flags, &mask, &value) )
1118                 return ;
1119
1120         if( giDebugLevel )
1121                 Debug(Client, "Set %i(%s) flags to %x (masked %x)\n",
1122                         uid, username, mask, value);
1123
1124         // Apply flags
1125         Bank_SetFlags(uid, mask, value);
1126
1127         // Return OK
1128         sendf(Client->Socket, "200 User Updated\n");
1129 }
1130
1131 // --- INTERNAL HELPERS ---
1132 void Debug(tClient *Client, const char *Format, ...)
1133 {
1134         va_list args;
1135         //printf("%010i [%i] ", (int)time(NULL), Client->ID);
1136         printf("[%i] ", Client->ID);
1137         va_start(args, Format);
1138         vprintf(Format, args);
1139         va_end(args);
1140         printf("\n");
1141 }
1142
1143 int sendf(int Socket, const char *Format, ...)
1144 {
1145         va_list args;
1146          int    len;
1147
1148         va_start(args, Format);
1149         len = vsnprintf(NULL, 0, Format, args);
1150         va_end(args);
1151
1152         {
1153                 char    buf[len+1];
1154                 va_start(args, Format);
1155                 vsnprintf(buf, len+1, Format, args);
1156                 va_end(args);
1157
1158                 #if DEBUG_TRACE_CLIENT
1159                 printf("sendf: %s", buf);
1160                 #endif
1161
1162                 return send(Socket, buf, len, 0);
1163         }
1164 }
1165
1166 // Takes a series of char *'s in
1167 /**
1168  * \brief Parse space-separated entries into
1169  */
1170 int Server_int_ParseArgs(int bUseLongLast, char *ArgStr, ...)
1171 {
1172         va_list args;
1173         char    savedChar;
1174         char    **dest;
1175         va_start(args, ArgStr);
1176
1177         // Check for null
1178         if( !ArgStr )
1179         {
1180                 while( (dest = va_arg(args, char **)) )
1181                         *dest = NULL;
1182                 va_end(args);
1183                 return 1;
1184         }
1185
1186         savedChar = *ArgStr;
1187
1188         while( (dest = va_arg(args, char **)) )
1189         {
1190                 // Trim leading spaces
1191                 while( *ArgStr == ' ' || *ArgStr == '\t' )
1192                         ArgStr ++;
1193
1194                 // ... oops, not enough arguments
1195                 if( *ArgStr == '\0' )
1196                 {
1197                         // NULL unset arguments
1198                         do {
1199                                 *dest = NULL;
1200                         }       while( (dest = va_arg(args, char **)) );
1201                 va_end(args);
1202                         return -1;
1203                 }
1204
1205                 if( *ArgStr == '"' )
1206                 {
1207                         ArgStr ++;
1208                         *dest = ArgStr;
1209                         // Read until quote
1210                         while( *ArgStr && *ArgStr != '"' )
1211                                 ArgStr ++;
1212                 }
1213                 else
1214                 {
1215                         // Set destination
1216                         *dest = ArgStr;
1217                         // Read until a space
1218                         while( *ArgStr && *ArgStr != ' ' && *ArgStr != '\t' )
1219                                 ArgStr ++;
1220                 }
1221                 savedChar = *ArgStr;    // savedChar is used to un-mangle the last string
1222                 *ArgStr = '\0';
1223                 ArgStr ++;
1224         }
1225         va_end(args);
1226
1227         // Oops, extra arguments, and greedy not set
1228         if( (savedChar == ' ' || savedChar == '\t') && !bUseLongLast ) {
1229                 return -1;
1230         }
1231
1232         // Un-mangle last
1233         if(bUseLongLast) {
1234                 ArgStr --;
1235                 *ArgStr = savedChar;
1236         }
1237
1238         return 0;       // Success!
1239 }
1240
1241 int Server_int_ParseFlags(tClient *Client, const char *Str, int *Mask, int *Value)
1242 {
1243         struct {
1244                 const char      *Name;
1245                  int    Mask;
1246                  int    Value;
1247         }       cFLAGS[] = {
1248                  {"disabled", USER_FLAG_DISABLED, USER_FLAG_DISABLED}
1249                 ,{"door", USER_FLAG_DOORGROUP, USER_FLAG_DOORGROUP}
1250                 ,{"coke", USER_FLAG_COKE, USER_FLAG_COKE}
1251                 ,{"admin", USER_FLAG_ADMIN, USER_FLAG_ADMIN}
1252                 ,{"internal", USER_FLAG_INTERNAL, USER_FLAG_INTERNAL}
1253         };
1254         const int       ciNumFlags = sizeof(cFLAGS)/sizeof(cFLAGS[0]);
1255
1256         char    *space;
1257
1258         *Mask = 0;
1259         *Value = 0;
1260
1261         do {
1262                  int    bRemove = 0;
1263                  int    i;
1264                  int    len;
1265
1266                 while( *Str == ' ' )    Str ++; // Eat whitespace
1267                 space = strchr(Str, ',');       // Find the end of the flag
1268                 if(space)
1269                         len = space - Str;
1270                 else
1271                         len = strlen(Str);
1272
1273                 // Check for inversion/removal
1274                 if( *Str == '!' || *Str == '-' ) {
1275                         bRemove = 1;
1276                         Str ++;
1277                 }
1278                 else if( *Str == '+' ) {
1279                         Str ++;
1280                 }
1281
1282                 // Check flag values
1283                 for( i = 0; i < ciNumFlags; i ++ )
1284                 {
1285                         if( strncmp(Str, cFLAGS[i].Name, len) == 0 ) {
1286                                 *Mask |= cFLAGS[i].Mask;
1287                                 *Value &= ~cFLAGS[i].Mask;
1288                                 if( !bRemove )
1289                                         *Value |= cFLAGS[i].Value;
1290                                 break;
1291                         }
1292                 }
1293
1294                 // Error check
1295                 if( i == ciNumFlags ) {
1296                         char    val[len+1];
1297                         strncpy(val, Str, len+1);
1298                         sendf(Client->Socket, "407 Unknown flag value '%s'\n", val);
1299                         return -1;
1300                 }
1301
1302                 Str = space + 1;
1303         } while(space);
1304
1305         return 0;
1306 }