src/server/server.c

   1 /*
   2  * OpenDispense 2
   3  * UCC (University [of WA] Computer Club) Electronic Accounting System
   4  *
   5  * server.c - Client Server Code
   6  *
   7  * This file is licenced under the 3-clause BSD Licence. See the file
   8  * COPYING for full details.
   9  */
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include "common.h"
  13 #include <sys/socket.h>
  14 #include <netinet/in.h>
  15 #include <arpa/inet.h>
  16 #include <unistd.h>
  17 #include <string.h>
  18 #include <limits.h>
  19 #include <stdarg.h>
  20
  21 #define DEBUG_TRACE_CLIENT      0
  22
  23 // Statistics
  24 #define MAX_CONNECTION_QUEUE    5
  25 #define INPUT_BUFFER_SIZE       256
  26 #define CLIENT_TIMEOUT  10      // Seconds
  27
  28 #define HASH_TYPE       SHA1
  29 #define HASH_LENGTH     20
  30
  31 #define MSG_STR_TOO_LONG        "499 Command too long (limit "EXPSTR(INPUT_BUFFER_SIZE)")\n"
  32
  33 // === TYPES ===
  34 typedef struct sClient
  35 {
  36          int    Socket; // Client socket ID
  37          int    ID;     // Client ID
  38
  39          int    bIsTrusted;     // Is the connection from a trusted host/port
  40
  41         char    *Username;
  42         char    Salt[9];
  43
  44          int    UID;
  45          int    EffectiveUID;
  46          int    bIsAuthed;
  47 }       tClient;
  48
  49 // === PROTOTYPES ===
  50 void    Server_Start(void);
  51 void    Server_Cleanup(void);
  52 void    Server_HandleClient(int Socket, int bTrusted);
  53 void    Server_ParseClientCommand(tClient *Client, char *CommandString);
  54 // --- Commands ---
  55 void    Server_Cmd_USER(tClient *Client, char *Args);
  56 void    Server_Cmd_PASS(tClient *Client, char *Args);
  57 void    Server_Cmd_AUTOAUTH(tClient *Client, char *Args);
  58 void    Server_Cmd_SETEUSER(tClient *Client, char *Args);
  59 void    Server_Cmd_ENUMITEMS(tClient *Client, char *Args);
  60 void    Server_Cmd_ITEMINFO(tClient *Client, char *Args);
  61 void    Server_Cmd_DISPENSE(tClient *Client, char *Args);
  62 void    Server_Cmd_GIVE(tClient *Client, char *Args);
  63 void    Server_Cmd_DONATE(tClient *Client, char *Args);
  64 void    Server_Cmd_ADD(tClient *Client, char *Args);
  65 void    Server_Cmd_SET(tClient *Client, char *Args);
  66 void    Server_Cmd_ENUMUSERS(tClient *Client, char *Args);
  67 void    Server_Cmd_USERINFO(tClient *Client, char *Args);
  68 void    _SendUserInfo(tClient *Client, int UserID);
  69 void    Server_Cmd_USERADD(tClient *Client, char *Args);
  70 void    Server_Cmd_USERFLAGS(tClient *Client, char *Args);
  71 // --- Helpers ---
  72 void    Debug(tClient *Client, const char *Format, ...);
  73  int    sendf(int Socket, const char *Format, ...);
  74  int    Server_int_ParseArgs(int bUseLongArg, char *ArgStr, ...);
  75  int    Server_int_ParseFlags(tClient *Client, const char *Str, int *Mask, int *Value);
  76
  77 // === CONSTANTS ===
  78 // - Commands
  79 const struct sClientCommand {
  80         const char      *Name;
  81         void    (*Function)(tClient *Client, char *Arguments);
  82 }       gaServer_Commands[] = {
  83         {"USER", Server_Cmd_USER},
  84         {"PASS", Server_Cmd_PASS},
  85         {"AUTOAUTH", Server_Cmd_AUTOAUTH},
  86         {"SETEUSER", Server_Cmd_SETEUSER},
  87         {"ENUM_ITEMS", Server_Cmd_ENUMITEMS},
  88         {"ITEM_INFO", Server_Cmd_ITEMINFO},
  89         {"DISPENSE", Server_Cmd_DISPENSE},
  90         {"GIVE", Server_Cmd_GIVE},
  91         {"DONATE", Server_Cmd_DONATE},
  92         {"ADD", Server_Cmd_ADD},
  93         {"SET", Server_Cmd_SET},
  94         {"ENUM_USERS", Server_Cmd_ENUMUSERS},
  95         {"USER_INFO", Server_Cmd_USERINFO},
  96         {"USER_ADD", Server_Cmd_USERADD},
  97         {"USER_FLAGS", Server_Cmd_USERFLAGS}
  98 };
  99 #define NUM_COMMANDS    ((int)(sizeof(gaServer_Commands)/sizeof(gaServer_Commands[0])))
 100
 101 // === GLOBALS ===
 102  int    giServer_Port = 11020;
 103  int    giServer_NextClientID = 1;
 104  int    giServer_Socket;
 105
 106 // === CODE ===
 107 /**
 108  * \brief Open listenting socket and serve connections
 109  */
 110 void Server_Start(void)
 111 {
 112          int    client_socket;
 113         struct sockaddr_in      server_addr, client_addr;
 114
 115         atexit(Server_Cleanup);
 116
 117         // Create Server
 118         giServer_Socket = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 119         if( giServer_Socket < 0 ) {
 120                 fprintf(stderr, "ERROR: Unable to create server socket\n");
 121                 return ;
 122         }
 123
 124         // Make listen address
 125         memset(&server_addr, 0, sizeof(server_addr));
 126         server_addr.sin_family = AF_INET;       // Internet Socket
 127         server_addr.sin_addr.s_addr = htonl(INADDR_ANY);        // Listen on all interfaces
 128         server_addr.sin_port = htons(giServer_Port);    // Port
 129
 130         // Bind
 131         if( bind(giServer_Socket, (struct sockaddr *) &server_addr, sizeof(server_addr)) < 0 ) {
 132                 fprintf(stderr, "ERROR: Unable to bind to 0.0.0.0:%i\n", giServer_Port);
 133                 perror("Binding");
 134                 return ;
 135         }
 136
 137         // Listen
 138         if( listen(giServer_Socket, MAX_CONNECTION_QUEUE) < 0 ) {
 139                 fprintf(stderr, "ERROR: Unable to listen to socket\n");
 140                 perror("Listen");
 141                 return ;
 142         }
 143
 144         printf("Listening on 0.0.0.0:%i\n", giServer_Port);
 145
 146         // write pidfile
 147 //      {
 148 //              FILE *fp = fopen("/var/run/dispsrv.pid", "w");
 149 //              fprintf(fp, "%i", getpid());
 150 //              fclose(fp);
 151 //      }
 152
 153         for(;;)
 154         {
 155                 uint    len = sizeof(client_addr);
 156                  int    bTrusted = 0;
 157
 158                 // Accept a connection
 159                 client_socket = accept(giServer_Socket, (struct sockaddr *) &client_addr, &len);
 160                 if(client_socket < 0) {
 161                         fprintf(stderr, "ERROR: Unable to accept client connection\n");
 162                         return ;
 163                 }
 164
 165                 // Set a timeout on the user conneciton
 166                 {
 167                         struct timeval tv;
 168                         tv.tv_sec = CLIENT_TIMEOUT;
 169                         tv.tv_usec = 0;
 170                         if( setsockopt(client_socket, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) )
 171                         {
 172                                 perror("setsockopt");
 173                                 return ;
 174                         }
 175                 }
 176
 177                 // Debug: Print the connection string
 178                 if(giDebugLevel >= 2) {
 179                         char    ipstr[INET_ADDRSTRLEN];
 180                         inet_ntop(AF_INET, &client_addr.sin_addr, ipstr, INET_ADDRSTRLEN);
 181                         printf("Client connection from %s:%i\n",
 182                                 ipstr, ntohs(client_addr.sin_port));
 183                 }
 184
 185                 // Doesn't matter what, localhost is trusted
 186                 if( ntohl( client_addr.sin_addr.s_addr ) == 0x7F000001 )
 187                         bTrusted = 1;
 188
 189                 // Trusted Connections
 190                 if( ntohs(client_addr.sin_port) < 1024 )
 191                 {
 192                         // TODO: Make this runtime configurable
 193                         switch( ntohl( client_addr.sin_addr.s_addr ) )
 194                         {
 195                         case 0x7F000001:        // 127.0.0.1    localhost
 196                 //      case 0x825F0D00:        // 130.95.13.0
 197                         case 0x825F0D07:        // 130.95.13.7  motsugo
 198                         case 0x825F0D11:        // 130.95.13.17 mermaid
 199                         case 0x825F0D12:        // 130.95.13.18 mussel
 200                         case 0x825F0D17:        // 130.95.13.23 martello
 201                         case 0x825F0D42:        // 130.95.13.66 heathred
 202                                 bTrusted = 1;
 203                                 break;
 204                         default:
 205                                 break;
 206                         }
 207                 }
 208
 209                 // TODO: Multithread this?
 210                 Server_HandleClient(client_socket, bTrusted);
 211
 212                 close(client_socket);
 213         }
 214 }
 215
 216 void Server_Cleanup(void)
 217 {
 218         printf("Close(%i)\n", giServer_Socket);
 219         close(giServer_Socket);
 220 }
 221
 222 /**
 223  * \brief Reads from a client socket and parses the command strings
 224  * \param Socket        Client socket number/handle
 225  * \param bTrusted      Is the client trusted?
 226  */
 227 void Server_HandleClient(int Socket, int bTrusted)
 228 {
 229         char    inbuf[INPUT_BUFFER_SIZE];
 230         char    *buf = inbuf;
 231          int    remspace = INPUT_BUFFER_SIZE-1;
 232          int    bytes = -1;
 233         tClient clientInfo;
 234
 235         memset(&clientInfo, 0, sizeof(clientInfo));
 236
 237         // Initialise Client info
 238         clientInfo.Socket = Socket;
 239         clientInfo.ID = giServer_NextClientID ++;
 240         clientInfo.bIsTrusted = bTrusted;
 241         clientInfo.EffectiveUID = -1;
 242
 243         // Read from client
 244         /*
 245          * Notes:
 246          * - The `buf` and `remspace` variables allow a line to span several
 247          *   calls to recv(), if a line is not completed in one recv() call
 248          *   it is saved to the beginning of `inbuf` and `buf` is updated to
 249          *   the end of it.
 250          */
 251         // TODO: Use select() instead (to give a timeout)
 252         while( (bytes = recv(Socket, buf, remspace, 0)) > 0 )
 253         {
 254                 char    *eol, *start;
 255                 buf[bytes] = '\0';      // Allow us to use stdlib string functions on it
 256
 257                 // Split by lines
 258                 start = inbuf;
 259                 while( (eol = strchr(start, '\n')) )
 260                 {
 261                         *eol = '\0';
 262
 263                         Server_ParseClientCommand(&clientInfo, start);
 264
 265                         start = eol + 1;
 266                 }
 267
 268                 // Check if there was an incomplete line
 269                 if( *start != '\0' ) {
 270                          int    tailBytes = bytes - (start-buf);
 271                         // Roll back in buffer
 272                         memcpy(inbuf, start, tailBytes);
 273                         remspace -= tailBytes;
 274                         if(remspace == 0) {
 275                                 send(Socket, MSG_STR_TOO_LONG, sizeof(MSG_STR_TOO_LONG), 0);
 276                                 buf = inbuf;
 277                                 remspace = INPUT_BUFFER_SIZE - 1;
 278                         }
 279                 }
 280                 else {
 281                         buf = inbuf;
 282                         remspace = INPUT_BUFFER_SIZE - 1;
 283                 }
 284         }
 285
 286         // Check for errors
 287         if( bytes < 0 ) {
 288                 fprintf(stderr, "ERROR: Unable to recieve from client on socket %i\n", Socket);
 289                 return ;
 290         }
 291
 292         if(giDebugLevel >= 2) {
 293                 printf("Client %i: Disconnected\n", clientInfo.ID);
 294         }
 295 }
 296
 297 /**
 298  * \brief Parses a client command and calls the required helper function
 299  * \param Client        Pointer to client state structure
 300  * \param CommandString Command from client (single line of the command)
 301  * \return Heap String to return to the client
 302  */
 303 void Server_ParseClientCommand(tClient *Client, char *CommandString)
 304 {
 305         char    *command, *args;
 306          int    i;
 307
 308         if( giDebugLevel >= 2 )
 309                 Debug(Client, "Server_ParseClientCommand: (CommandString = '%s')", CommandString);
 310
 311         if( Server_int_ParseArgs(1, CommandString, &command, &args, NULL) )
 312         {
 313 //              printf("command=%s, args=%s\n", command, args);
 314                 // Is this an error? (just ignore for now)
 315                 //args = "";
 316         }
 317
 318
 319         // Find command
 320         for( i = 0; i < NUM_COMMANDS; i++ )
 321         {
 322                 if(strcmp(command, gaServer_Commands[i].Name) == 0) {
 323                         if( giDebugLevel >= 2 )
 324                                 Debug(Client, "CMD %s - \"%s\"", command, args);
 325                         gaServer_Commands[i].Function(Client, args);
 326                         return ;
 327                 }
 328         }
 329
 330         sendf(Client->Socket, "400 Unknown Command\n");
 331 }
 332
 333 // ---
 334 // Commands
 335 // ---
 336 /**
 337  * \brief Set client username
 338  *
 339  * Usage: USER <username>
 340  */
 341 void Server_Cmd_USER(tClient *Client, char *Args)
 342 {
 343         char    *username;
 344
 345         if( Server_int_ParseArgs(0, Args, &username, NULL) )
 346         {
 347                 sendf(Client->Socket, "407 USER takes 1 argument\n");
 348                 return ;
 349         }
 350
 351         // Debug!
 352         if( giDebugLevel )
 353                 Debug(Client, "Authenticating as '%s'", username);
 354
 355         // Save username
 356         if(Client->Username)
 357                 free(Client->Username);
 358         Client->Username = strdup(username);
 359
 360         #if USE_SALT
 361         // Create a salt (that changes if the username is changed)
 362         // Yes, I know, I'm a little paranoid, but who isn't?
 363         Client->Salt[0] = 0x21 + (rand()&0x3F);
 364         Client->Salt[1] = 0x21 + (rand()&0x3F);
 365         Client->Salt[2] = 0x21 + (rand()&0x3F);
 366         Client->Salt[3] = 0x21 + (rand()&0x3F);
 367         Client->Salt[4] = 0x21 + (rand()&0x3F);
 368         Client->Salt[5] = 0x21 + (rand()&0x3F);
 369         Client->Salt[6] = 0x21 + (rand()&0x3F);
 370         Client->Salt[7] = 0x21 + (rand()&0x3F);
 371
 372         // TODO: Also send hash type to use, (SHA1 or crypt according to [DAA])
 373         sendf(Client->Socket, "100 SALT %s\n", Client->Salt);
 374         #else
 375         sendf(Client->Socket, "100 User Set\n");
 376         #endif
 377 }
 378
 379 /**
 380  * \brief Authenticate as a user
 381  *
 382  * Usage: PASS <hash>
 383  */
 384 void Server_Cmd_PASS(tClient *Client, char *Args)
 385 {
 386         char    *passhash;
 387          int    flags;
 388
 389         if( Server_int_ParseArgs(0, Args, &passhash, NULL) )
 390         {
 391                 sendf(Client->Socket, "407 PASS takes 1 argument\n");
 392                 return ;
 393         }
 394
 395         // Pass on to cokebank
 396         Client->UID = Bank_GetUserAuth(Client->Salt, Client->Username, passhash);
 397
 398         if( Client->UID == -1 ) {
 399                 sendf(Client->Socket, "401 Auth Failure\n");
 400                 return ;
 401         }
 402
 403         flags = Bank_GetFlags(Client->UID);
 404         if( flags & USER_FLAG_DISABLED ) {
 405                 Client->UID = -1;
 406                 sendf(Client->Socket, "403 Account Disabled\n");
 407                 return ;
 408         }
 409         if( flags & USER_FLAG_INTERNAL ) {
 410                 Client->UID = -1;
 411                 sendf(Client->Socket, "403 Internal account\n");
 412                 return ;
 413         }
 414
 415         Client->bIsAuthed = 1;
 416         sendf(Client->Socket, "200 Auth OK\n");
 417 }
 418
 419 /**
 420  * \brief Authenticate as a user without a password
 421  *
 422  * Usage: AUTOAUTH <user>
 423  */
 424 void Server_Cmd_AUTOAUTH(tClient *Client, char *Args)
 425 {
 426         char    *username;
 427          int    userflags;
 428
 429         if( Server_int_ParseArgs(0, Args, &username, NULL) )
 430         {
 431                 sendf(Client->Socket, "407 AUTOAUTH takes 1 argument\n");
 432                 return ;
 433         }
 434
 435         // Check if trusted
 436         if( !Client->bIsTrusted ) {
 437                 if(giDebugLevel)
 438                         Debug(Client, "Untrusted client attempting to AUTOAUTH");
 439                 sendf(Client->Socket, "401 Untrusted\n");
 440                 return ;
 441         }
 442
 443         // Get UID
 444         Client->UID = Bank_GetAcctByName( username );
 445         if( Client->UID < 0 ) {
 446                 if(giDebugLevel)
 447                         Debug(Client, "Unknown user '%s'", username);
 448                 sendf(Client->Socket, "403 Auth Failure\n");
 449                 return ;
 450         }
 451
 452         userflags = Bank_GetFlags(Client->UID);
 453         // You can't be an internal account
 454         if( userflags & USER_FLAG_INTERNAL ) {
 455                 if(giDebugLevel)
 456                         Debug(Client, "Autoauth as '%s', not allowed", username);
 457                 Client->UID = -1;
 458                 sendf(Client->Socket, "403 Account is internal\n");
 459                 return ;
 460         }
 461
 462         // Disabled accounts
 463         if( userflags & USER_FLAG_DISABLED ) {
 464                 Client->UID = -1;
 465                 sendf(Client->Socket, "403 Account disabled\n");
 466                 return ;
 467         }
 468
 469         Client->bIsAuthed = 1;
 470
 471         if(giDebugLevel)
 472                 Debug(Client, "Auto authenticated as '%s' (%i)", username, Client->UID);
 473
 474         sendf(Client->Socket, "200 Auth OK\n");
 475 }
 476
 477 /**
 478  * \brief Set effective user
 479  */
 480 void Server_Cmd_SETEUSER(tClient *Client, char *Args)
 481 {
 482         char    *username;
 483          int    eUserFlags, userFlags;
 484
 485         if( Server_int_ParseArgs(0, Args, &username, NULL) )
 486         {
 487                 sendf(Client->Socket, "407 SETEUSER takes 1 argument\n");
 488                 return ;
 489         }
 490
 491         if( !strlen(Args) ) {
 492                 sendf(Client->Socket, "407 SETEUSER expects an argument\n");
 493                 return ;
 494         }
 495
 496         // Check user permissions
 497         userFlags = Bank_GetFlags(Client->UID);
 498         if( !(userFlags & (USER_FLAG_COKE|USER_FLAG_ADMIN)) ) {
 499                 sendf(Client->Socket, "403 Not in coke\n");
 500                 return ;
 501         }
 502
 503         // Set id
 504         Client->EffectiveUID = Bank_GetAcctByName(username);
 505         if( Client->EffectiveUID == -1 ) {
 506                 sendf(Client->Socket, "404 User not found\n");
 507                 return ;
 508         }
 509
 510         // You can't be an internal account
 511         if( !(userFlags & USER_FLAG_ADMIN) )
 512         {
 513                 eUserFlags = Bank_GetFlags(Client->EffectiveUID);
 514                 if( eUserFlags & USER_FLAG_INTERNAL ) {
 515                         Client->EffectiveUID = -1;
 516                         sendf(Client->Socket, "404 User not found\n");
 517                         return ;
 518                 }
 519                 // Disabled only avaliable to admins
 520                 if( eUserFlags & USER_FLAG_DISABLED ) {
 521                         Client->EffectiveUID = -1;
 522                         sendf(Client->Socket, "403 Account disabled\n");
 523                         return ;
 524                 }
 525         }
 526
 527         sendf(Client->Socket, "200 User set\n");
 528 }
 529
 530 /**
 531  * \brief Send an item status to the client
 532  * \param Client        Who to?
 533  * \param Item  Item to send
 534  */
 535 void Server_int_SendItem(tClient *Client, tItem *Item)
 536 {
 537         char    *status = "avail";
 538
 539         if( Item->Handler->CanDispense )
 540         {
 541                 switch(Item->Handler->CanDispense(Client->UID, Item->ID))
 542                 {
 543                 case  0:        status = "avail";       break;
 544                 case  1:        status = "sold";        break;
 545                 default:
 546                 case -1:        status = "error";       break;
 547                 }
 548         }
 549
 550         sendf(Client->Socket,
 551                 "202 Item %s:%i %s %i %s\n",
 552                 Item->Handler->Name, Item->ID, status, Item->Price, Item->Name
 553                 );
 554 }
 555
 556 /**
 557  * \brief Enumerate the items that the server knows about
 558  */
 559 void Server_Cmd_ENUMITEMS(tClient *Client, char *Args)
 560 {
 561          int    i, count;
 562
 563         if( Args != NULL && strlen(Args) ) {
 564                 sendf(Client->Socket, "407 ENUM_ITEMS takes no arguments\n");
 565                 return ;
 566         }
 567
 568         // Count shown items
 569         count = 0;
 570         for( i = 0; i < giNumItems; i ++ ) {
 571                 if( gaItems[i].bHidden )        continue;
 572                 count ++;
 573         }
 574
 575         sendf(Client->Socket, "201 Items %i\n", count);
 576
 577         for( i = 0; i < giNumItems; i ++ ) {
 578                 if( gaItems[i].bHidden )        continue;
 579                 Server_int_SendItem( Client, &gaItems[i] );
 580         }
 581
 582         sendf(Client->Socket, "200 List end\n");
 583 }
 584
 585 tItem *_GetItemFromString(char *String)
 586 {
 587         tHandler        *handler;
 588         char    *type = String;
 589         char    *colon = strchr(String, ':');
 590          int    num, i;
 591
 592         if( !colon ) {
 593                 return NULL;
 594         }
 595
 596         num = atoi(colon+1);
 597         *colon = '\0';
 598
 599         // Find handler
 600         handler = NULL;
 601         for( i = 0; i < giNumHandlers; i ++ )
 602         {
 603                 if( strcmp(gaHandlers[i]->Name, type) == 0) {
 604                         handler = gaHandlers[i];
 605                         break;
 606                 }
 607         }
 608         if( !handler ) {
 609                 return NULL;
 610         }
 611
 612         // Find item
 613         for( i = 0; i < giNumItems; i ++ )
 614         {
 615                 if( gaItems[i].Handler != handler )     continue;
 616                 if( gaItems[i].ID != num )      continue;
 617                 return &gaItems[i];
 618         }
 619         return NULL;
 620 }
 621
 622 /**
 623  * \brief Fetch information on a specific item
 624  */
 625 void Server_Cmd_ITEMINFO(tClient *Client, char *Args)
 626 {
 627         tItem   *item;
 628         char    *itemname;
 629
 630         if( Server_int_ParseArgs(0, Args, &itemname, NULL) ) {
 631                 sendf(Client->Socket, "407 ITEMINFO takes 1 argument\n");
 632                 return ;
 633         }
 634         item = _GetItemFromString(Args);
 635
 636         if( !item ) {
 637                 sendf(Client->Socket, "406 Bad Item ID\n");
 638                 return ;
 639         }
 640
 641         Server_int_SendItem( Client, item );
 642 }
 643
 644 void Server_Cmd_DISPENSE(tClient *Client, char *Args)
 645 {
 646         tItem   *item;
 647          int    ret;
 648          int    uid;
 649         char    *itemname;
 650
 651         if( Server_int_ParseArgs(0, Args, &itemname, NULL) ) {
 652                 sendf(Client->Socket, "407 DISPENSE takes only 1 argument\n");
 653                 return ;
 654         }
 655
 656         if( !Client->bIsAuthed ) {
 657                 sendf(Client->Socket, "401 Not Authenticated\n");
 658                 return ;
 659         }
 660
 661         item = _GetItemFromString(itemname);
 662         if( !item ) {
 663                 sendf(Client->Socket, "406 Bad Item ID\n");
 664                 return ;
 665         }
 666
 667         if( Client->EffectiveUID != -1 ) {
 668                 uid = Client->EffectiveUID;
 669         }
 670         else {
 671                 uid = Client->UID;
 672         }
 673
 674         switch( ret = DispenseItem( Client->UID, uid, item ) )
 675         {
 676         case 0: sendf(Client->Socket, "200 Dispense OK\n");     return ;
 677         case 1: sendf(Client->Socket, "501 Unable to dispense\n");      return ;
 678         case 2: sendf(Client->Socket, "402 Poor You\n");        return ;
 679         default:
 680                 sendf(Client->Socket, "500 Dispense Error\n");
 681                 return ;
 682         }
 683 }
 684
 685 void Server_Cmd_GIVE(tClient *Client, char *Args)
 686 {
 687         char    *recipient, *ammount, *reason;
 688          int    uid, iAmmount;
 689          int    thisUid;
 690
 691         // Parse arguments
 692         if( Server_int_ParseArgs(1, Args, &recipient, &ammount, &reason, NULL) ) {
 693                 sendf(Client->Socket, "407 GIVE takes only 3 arguments\n");
 694                 return ;
 695         }
 696         // Check for authed
 697         if( !Client->bIsAuthed ) {
 698                 sendf(Client->Socket, "401 Not Authenticated\n");
 699                 return ;
 700         }
 701
 702         // Get recipient
 703         uid = Bank_GetAcctByName(recipient);
 704         if( uid == -1 ) {
 705                 sendf(Client->Socket, "404 Invalid target user\n");
 706                 return ;
 707         }
 708
 709         // You can't alter an internal account
 710 //      if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 711 //              sendf(Client->Socket, "404 Invalid target user\n");
 712 //              return ;
 713 //      }
 714
 715         // Parse ammount
 716         iAmmount = atoi(ammount);
 717         if( iAmmount <= 0 ) {
 718                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 719                 return ;
 720         }
 721
 722         if( Client->EffectiveUID != -1 ) {
 723                 thisUid = Client->EffectiveUID;
 724         }
 725         else {
 726                 thisUid = Client->UID;
 727         }
 728
 729         // Do give
 730         switch( DispenseGive(Client->UID, thisUid, uid, iAmmount, reason) )
 731         {
 732         case 0:
 733                 sendf(Client->Socket, "200 Give OK\n");
 734                 return ;
 735         case 2:
 736                 sendf(Client->Socket, "402 Poor You\n");
 737                 return ;
 738         default:
 739                 sendf(Client->Socket, "500 Unknown error\n");
 740                 return ;
 741         }
 742 }
 743
 744 void Server_Cmd_DONATE(tClient *Client, char *Args)
 745 {
 746         char    *ammount, *reason;
 747          int    iAmmount;
 748          int    thisUid;
 749
 750         // Parse arguments
 751         if( Server_int_ParseArgs(1, Args, &ammount, &reason, NULL) ) {
 752                 sendf(Client->Socket, "407 DONATE takes 2 arguments\n");
 753                 return ;
 754         }
 755
 756         if( !Client->bIsAuthed ) {
 757                 sendf(Client->Socket, "401 Not Authenticated\n");
 758                 return ;
 759         }
 760
 761         // Parse ammount
 762         iAmmount = atoi(ammount);
 763         if( iAmmount <= 0 ) {
 764                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 765                 return ;
 766         }
 767
 768         // Handle effective users
 769         if( Client->EffectiveUID != -1 ) {
 770                 thisUid = Client->EffectiveUID;
 771         }
 772         else {
 773                 thisUid = Client->UID;
 774         }
 775
 776         // Do give
 777         switch( DispenseDonate(Client->UID, thisUid, iAmmount, reason) )
 778         {
 779         case 0:
 780                 sendf(Client->Socket, "200 Give OK\n");
 781                 return ;
 782         case 2:
 783                 sendf(Client->Socket, "402 Poor You\n");
 784                 return ;
 785         default:
 786                 sendf(Client->Socket, "500 Unknown error\n");
 787                 return ;
 788         }
 789 }
 790
 791 void Server_Cmd_ADD(tClient *Client, char *Args)
 792 {
 793         char    *user, *ammount, *reason;
 794          int    uid, iAmmount;
 795
 796         // Parse arguments
 797         if( Server_int_ParseArgs(1, Args, &user, &ammount, &reason, NULL) ) {
 798                 sendf(Client->Socket, "407 ADD takes 3 arguments\n");
 799                 return ;
 800         }
 801
 802         if( !Client->bIsAuthed ) {
 803                 sendf(Client->Socket, "401 Not Authenticated\n");
 804                 return ;
 805         }
 806
 807         // Check user permissions
 808         if( !(Bank_GetFlags(Client->UID) & (USER_FLAG_COKE|USER_FLAG_ADMIN))  ) {
 809                 sendf(Client->Socket, "403 Not in coke\n");
 810                 return ;
 811         }
 812
 813         // Get recipient
 814         uid = Bank_GetAcctByName(user);
 815         if( uid == -1 ) {
 816                 sendf(Client->Socket, "404 Invalid user\n");
 817                 return ;
 818         }
 819
 820         // You can't alter an internal account
 821         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) )
 822         {
 823                 if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 824                         sendf(Client->Socket, "404 Invalid user\n");
 825                         return ;
 826                 }
 827                 // TODO: Maybe disallow changes to disabled?
 828         }
 829
 830         // Parse ammount
 831         iAmmount = atoi(ammount);
 832         if( iAmmount == 0 && ammount[0] != '0' ) {
 833                 sendf(Client->Socket, "407 Invalid Argument\n");
 834                 return ;
 835         }
 836
 837         // Do give
 838         switch( DispenseAdd(Client->UID, uid, iAmmount, reason) )
 839         {
 840         case 0:
 841                 sendf(Client->Socket, "200 Add OK\n");
 842                 return ;
 843         case 2:
 844                 sendf(Client->Socket, "402 Poor Guy\n");
 845                 return ;
 846         default:
 847                 sendf(Client->Socket, "500 Unknown error\n");
 848                 return ;
 849         }
 850 }
 851
 852 void Server_Cmd_SET(tClient *Client, char *Args)
 853 {
 854         char    *user, *ammount, *reason;
 855          int    uid, iAmmount;
 856
 857         // Parse arguments
 858         if( Server_int_ParseArgs(1, Args, &user, &ammount, &reason, NULL) ) {
 859                 sendf(Client->Socket, "407 SET takes 3 arguments\n");
 860                 return ;
 861         }
 862
 863         if( !Client->bIsAuthed ) {
 864                 sendf(Client->Socket, "401 Not Authenticated\n");
 865                 return ;
 866         }
 867
 868         // Check user permissions
 869         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN)  ) {
 870                 sendf(Client->Socket, "403 Not an admin\n");
 871                 return ;
 872         }
 873
 874         // Get recipient
 875         uid = Bank_GetAcctByName(user);
 876         if( uid == -1 ) {
 877                 sendf(Client->Socket, "404 Invalid user\n");
 878                 return ;
 879         }
 880
 881         // Parse ammount
 882         iAmmount = atoi(ammount);
 883         if( iAmmount == 0 && ammount[0] != '0' ) {
 884                 sendf(Client->Socket, "407 Invalid Argument\n");
 885                 return ;
 886         }
 887
 888         // Do give
 889         switch( DispenseSet(Client->UID, uid, iAmmount, reason) )
 890         {
 891         case 0:
 892                 sendf(Client->Socket, "200 Add OK\n");
 893                 return ;
 894         case 2:
 895                 sendf(Client->Socket, "402 Poor Guy\n");
 896                 return ;
 897         default:
 898                 sendf(Client->Socket, "500 Unknown error\n");
 899                 return ;
 900         }
 901 }
 902
 903 void Server_Cmd_ENUMUSERS(tClient *Client, char *Args)
 904 {
 905          int    i, numRet = 0;
 906         tAcctIterator   *it;
 907          int    maxBal = INT_MAX, minBal = INT_MIN;
 908          int    flagMask = 0, flagVal = 0;
 909          int    sort = BANK_ITFLAG_SORT_NAME;
 910         time_t  lastSeenAfter=0, lastSeenBefore=0;
 911
 912          int    flags;  // Iterator flags
 913          int    balValue;       // Balance value for iterator
 914         time_t  timeValue;      // Time value for iterator
 915
 916         // Parse arguments
 917         if( Args && strlen(Args) )
 918         {
 919                 char    *space = Args, *type, *val;
 920                 do
 921                 {
 922                         type = space;
 923                         while(*type == ' ')     type ++;
 924                         // Get next space
 925                         space = strchr(space, ' ');
 926                         if(space)       *space = '\0';
 927
 928                         // Get type
 929                         val = strchr(type, ':');
 930                         if( val ) {
 931                                 *val = '\0';
 932                                 val ++;
 933
 934                                 // Types
 935                                 // - Minium Balance
 936                                 if( strcmp(type, "min_balance") == 0 ) {
 937                                         minBal = atoi(val);
 938                                 }
 939                                 // - Maximum Balance
 940                                 else if( strcmp(type, "max_balance") == 0 ) {
 941                                         maxBal = atoi(val);
 942                                 }
 943                                 // - Flags
 944                                 else if( strcmp(type, "flags") == 0 ) {
 945                                         if( Server_int_ParseFlags(Client, val, &flagMask, &flagVal) )
 946                                                 return ;
 947                                 }
 948                                 // - Last seen before timestamp
 949                                 else if( strcmp(type, "last_seen_before") == 0 ) {
 950                                         lastSeenAfter = atoll(val);
 951                                 }
 952                                 // - Last seen after timestamp
 953                                 else if( strcmp(type, "last_seen_after") == 0 ) {
 954                                         lastSeenAfter = atoll(val);
 955                                 }
 956                                 // - Sorting
 957                                 else if( strcmp(type, "sort") == 0 ) {
 958                                         char    *dash = strchr(val, '-');
 959                                         if( dash ) {
 960                                                 *dash = '\0';
 961                                                 dash ++;
 962                                         }
 963                                         if( strcmp(val, "name") == 0 ) {
 964                                                 sort = BANK_ITFLAG_SORT_NAME;
 965                                         }
 966                                         else if( strcmp(val, "balance") == 0 ) {
 967                                                 sort = BANK_ITFLAG_SORT_BAL;
 968                                         }
 969                                         else if( strcmp(val, "lastseen") == 0 ) {
 970                                                 sort = BANK_ITFLAG_SORT_LASTSEEN;
 971                                         }
 972                                         else {
 973                                                 sendf(Client->Socket, "407 Unknown sort field ('%s')\n", val);
 974                                                 return ;
 975                                         }
 976                                         // Handle sort direction
 977                                         if( dash ) {
 978                                                 if( strcmp(dash, "desc") == 0 ) {
 979                                                         sort |= BANK_ITFLAG_REVSORT;
 980                                                 }
 981                                                 else {
 982                                                         sendf(Client->Socket, "407 Unknown sort direction '%s'\n", dash);
 983                                                         return ;
 984                                                 }
 985                                                 dash[-1] = '-';
 986                                         }
 987                                 }
 988                                 else {
 989                                         sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s:%s'\n", type, val);
 990                                         return ;
 991                                 }
 992
 993                                 val[-1] = ':';
 994                         }
 995                         else {
 996                                 sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s'\n", type);
 997                                 return ;
 998                         }
 999
1000                         // Eat whitespace
1001                         if( space ) {
1002                                 *space = ' ';   // Repair (to be nice)
1003                                 space ++;
1004                                 while(*space == ' ')    space ++;
1005                         }
1006                 }       while(space);
1007         }
1008
1009         // Create iterator
1010         if( maxBal != INT_MAX ) {
1011                 flags = sort|BANK_ITFLAG_MAXBALANCE;
1012                 balValue = maxBal;
1013         }
1014         else if( minBal != INT_MIN ) {
1015                 flags = sort|BANK_ITFLAG_MINBALANCE;
1016                 balValue = minBal;
1017         }
1018         else {
1019                 flags = sort;
1020                 balValue = 0;
1021         }
1022         if( lastSeenBefore ) {
1023                 timeValue = lastSeenBefore;
1024                 flags |= BANK_ITFLAG_SEENBEFORE;
1025         }
1026         else if( lastSeenAfter ) {
1027                 timeValue = lastSeenAfter;
1028                 flags |= BANK_ITFLAG_SEENAFTER;
1029         }
1030         else {
1031                 timeValue = 0;
1032         }
1033         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
1034
1035         // Get return number
1036         while( (i = Bank_IteratorNext(it)) != -1 )
1037         {
1038                 int bal = Bank_GetBalance(i);
1039
1040                 if( bal == INT_MIN )    continue;
1041
1042                 if( bal < minBal )      continue;
1043                 if( bal > maxBal )      continue;
1044
1045                 numRet ++;
1046         }
1047
1048         Bank_DelIterator(it);
1049
1050         // Send count
1051         sendf(Client->Socket, "201 Users %i\n", numRet);
1052
1053
1054         // Create iterator
1055         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
1056
1057         while( (i = Bank_IteratorNext(it)) != -1 )
1058         {
1059                 int bal = Bank_GetBalance(i);
1060
1061                 if( bal == INT_MIN )    continue;
1062
1063                 if( bal < minBal )      continue;
1064                 if( bal > maxBal )      continue;
1065
1066                 _SendUserInfo(Client, i);
1067         }
1068
1069         Bank_DelIterator(it);
1070
1071         sendf(Client->Socket, "200 List End\n");
1072 }
1073
1074 void Server_Cmd_USERINFO(tClient *Client, char *Args)
1075 {
1076          int    uid;
1077         char    *user;
1078
1079         // Parse arguments
1080         if( Server_int_ParseArgs(0, Args, &user, NULL) ) {
1081                 sendf(Client->Socket, "407 USER_INFO takes 1 argument\n");
1082                 return ;
1083         }
1084
1085         if( giDebugLevel )      Debug(Client, "User Info '%s'", user);
1086
1087         // Get recipient
1088         uid = Bank_GetAcctByName(user);
1089
1090         if( giDebugLevel >= 2 ) Debug(Client, "uid = %i", uid);
1091         if( uid == -1 ) {
1092                 sendf(Client->Socket, "404 Invalid user\n");
1093                 return ;
1094         }
1095
1096         _SendUserInfo(Client, uid);
1097 }
1098
1099 void _SendUserInfo(tClient *Client, int UserID)
1100 {
1101         char    *type, *disabled="", *door="";
1102          int    flags = Bank_GetFlags(UserID);
1103
1104         if( flags & USER_FLAG_INTERNAL ) {
1105                 type = "internal";
1106         }
1107         else if( flags & USER_FLAG_COKE ) {
1108                 if( flags & USER_FLAG_ADMIN )
1109                         type = "coke,admin";
1110                 else
1111                         type = "coke";
1112         }
1113         else if( flags & USER_FLAG_ADMIN ) {
1114                 type = "admin";
1115         }
1116         else {
1117                 type = "user";
1118         }
1119
1120         if( flags & USER_FLAG_DISABLED )
1121                 disabled = ",disabled";
1122         if( flags & USER_FLAG_DOORGROUP )
1123                 door = ",door";
1124
1125         // TODO: User flags/type
1126         sendf(
1127                 Client->Socket, "202 User %s %i %s%s%s\n",
1128                 Bank_GetAcctName(UserID), Bank_GetBalance(UserID),
1129                 type, disabled, door
1130                 );
1131 }
1132
1133 void Server_Cmd_USERADD(tClient *Client, char *Args)
1134 {
1135         char    *username;
1136
1137         // Parse arguments
1138         if( Server_int_ParseArgs(0, Args, &username, NULL) ) {
1139                 sendf(Client->Socket, "407 USER_ADD takes 1 argument\n");
1140                 return ;
1141         }
1142
1143         // Check permissions
1144         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1145                 sendf(Client->Socket, "403 Not a coke admin\n");
1146                 return ;
1147         }
1148
1149         // Try to create user
1150         if( Bank_CreateAcct(username) == -1 ) {
1151                 sendf(Client->Socket, "404 User exists\n");
1152                 return ;
1153         }
1154
1155         {
1156                 char    *thisName = Bank_GetAcctName(Client->UID);
1157                 Log_Info("Account '%s' created by '%s'", username, thisName);
1158                 free(thisName);
1159         }
1160
1161         sendf(Client->Socket, "200 User Added\n");
1162 }
1163
1164 void Server_Cmd_USERFLAGS(tClient *Client, char *Args)
1165 {
1166         char    *username, *flags;
1167          int    mask=0, value=0;
1168          int    uid;
1169
1170         // Parse arguments
1171         if( Server_int_ParseArgs(0, Args, &username, &flags, NULL) ) {
1172                 sendf(Client->Socket, "407 USER_FLAGS takes 2 arguments\n");
1173                 return ;
1174         }
1175
1176         // Check permissions
1177         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1178                 sendf(Client->Socket, "403 Not a coke admin\n");
1179                 return ;
1180         }
1181
1182         // Get UID
1183         uid = Bank_GetAcctByName(username);
1184         if( uid == -1 ) {
1185                 sendf(Client->Socket, "404 User '%s' not found\n", username);
1186                 return ;
1187         }
1188
1189         // Parse flags
1190         if( Server_int_ParseFlags(Client, flags, &mask, &value) )
1191                 return ;
1192
1193         if( giDebugLevel )
1194                 Debug(Client, "Set %i(%s) flags to %x (masked %x)\n",
1195                         uid, username, mask, value);
1196
1197         // Apply flags
1198         Bank_SetFlags(uid, mask, value);
1199
1200         // Return OK
1201         sendf(Client->Socket, "200 User Updated\n");
1202 }
1203
1204 // --- INTERNAL HELPERS ---
1205 void Debug(tClient *Client, const char *Format, ...)
1206 {
1207         va_list args;
1208         //printf("%010i [%i] ", (int)time(NULL), Client->ID);
1209         printf("[%i] ", Client->ID);
1210         va_start(args, Format);
1211         vprintf(Format, args);
1212         va_end(args);
1213         printf("\n");
1214 }
1215
1216 int sendf(int Socket, const char *Format, ...)
1217 {
1218         va_list args;
1219          int    len;
1220
1221         va_start(args, Format);
1222         len = vsnprintf(NULL, 0, Format, args);
1223         va_end(args);
1224
1225         {
1226                 char    buf[len+1];
1227                 va_start(args, Format);
1228                 vsnprintf(buf, len+1, Format, args);
1229                 va_end(args);
1230
1231                 #if DEBUG_TRACE_CLIENT
1232                 printf("sendf: %s", buf);
1233                 #endif
1234
1235                 return send(Socket, buf, len, 0);
1236         }
1237 }
1238
1239 // Takes a series of char *'s in
1240 /**
1241  * \brief Parse space-separated entries into
1242  */
1243 int Server_int_ParseArgs(int bUseLongLast, char *ArgStr, ...)
1244 {
1245         va_list args;
1246         char    savedChar;
1247         char    **dest;
1248         va_start(args, ArgStr);
1249
1250         // Check for null
1251         if( !ArgStr )
1252         {
1253                 while( (dest = va_arg(args, char **)) )
1254                         *dest = NULL;
1255                 va_end(args);
1256                 return 1;
1257         }
1258
1259         savedChar = *ArgStr;
1260
1261         while( (dest = va_arg(args, char **)) )
1262         {
1263                 // Trim leading spaces
1264                 while( *ArgStr == ' ' || *ArgStr == '\t' )
1265                         ArgStr ++;
1266
1267                 // ... oops, not enough arguments
1268                 if( *ArgStr == '\0' )
1269                 {
1270                         // NULL unset arguments
1271                         do {
1272                                 *dest = NULL;
1273                         }       while( (dest = va_arg(args, char **)) );
1274                 va_end(args);
1275                         return -1;
1276                 }
1277
1278                 if( *ArgStr == '"' )
1279                 {
1280                         ArgStr ++;
1281                         *dest = ArgStr;
1282                         // Read until quote
1283                         while( *ArgStr && *ArgStr != '"' )
1284                                 ArgStr ++;
1285                 }
1286                 else
1287                 {
1288                         // Set destination
1289                         *dest = ArgStr;
1290                         // Read until a space
1291                         while( *ArgStr && *ArgStr != ' ' && *ArgStr != '\t' )
1292                                 ArgStr ++;
1293                 }
1294                 savedChar = *ArgStr;    // savedChar is used to un-mangle the last string
1295                 *ArgStr = '\0';
1296                 ArgStr ++;
1297         }
1298         va_end(args);
1299
1300         // Oops, extra arguments, and greedy not set
1301         if( (savedChar == ' ' || savedChar == '\t') && !bUseLongLast ) {
1302                 return -1;
1303         }
1304
1305         // Un-mangle last
1306         if(bUseLongLast) {
1307                 ArgStr --;
1308                 *ArgStr = savedChar;
1309         }
1310
1311         return 0;       // Success!
1312 }
1313
1314 int Server_int_ParseFlags(tClient *Client, const char *Str, int *Mask, int *Value)
1315 {
1316         struct {
1317                 const char      *Name;
1318                  int    Mask;
1319                  int    Value;
1320         }       cFLAGS[] = {
1321                  {"disabled", USER_FLAG_DISABLED, USER_FLAG_DISABLED}
1322                 ,{"door", USER_FLAG_DOORGROUP, USER_FLAG_DOORGROUP}
1323                 ,{"coke", USER_FLAG_COKE, USER_FLAG_COKE}
1324                 ,{"admin", USER_FLAG_ADMIN, USER_FLAG_ADMIN}
1325                 ,{"internal", USER_FLAG_INTERNAL, USER_FLAG_INTERNAL}
1326         };
1327         const int       ciNumFlags = sizeof(cFLAGS)/sizeof(cFLAGS[0]);
1328
1329         char    *space;
1330
1331         *Mask = 0;
1332         *Value = 0;
1333
1334         do {
1335                  int    bRemove = 0;
1336                  int    i;
1337                  int    len;
1338
1339                 while( *Str == ' ' )    Str ++; // Eat whitespace
1340                 space = strchr(Str, ',');       // Find the end of the flag
1341                 if(space)
1342                         len = space - Str;
1343                 else
1344                         len = strlen(Str);
1345
1346                 // Check for inversion/removal
1347                 if( *Str == '!' || *Str == '-' ) {
1348                         bRemove = 1;
1349                         Str ++;
1350                 }
1351                 else if( *Str == '+' ) {
1352                         Str ++;
1353                 }
1354
1355                 // Check flag values
1356                 for( i = 0; i < ciNumFlags; i ++ )
1357                 {
1358                         if( strncmp(Str, cFLAGS[i].Name, len) == 0 ) {
1359                                 *Mask |= cFLAGS[i].Mask;
1360                                 *Value &= ~cFLAGS[i].Mask;
1361                                 if( !bRemove )
1362                                         *Value |= cFLAGS[i].Value;
1363                                 break;
1364                         }
1365                 }
1366
1367                 // Error check
1368                 if( i == ciNumFlags ) {
1369                         char    val[len+1];
1370                         strncpy(val, Str, len+1);
1371                         sendf(Client->Socket, "407 Unknown flag value '%s'\n", val);
1372                         return -1;
1373                 }
1374
1375                 Str = space + 1;
1376         } while(space);
1377
1378         return 0;
1379 }