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 "../common/config.h"
  14 #include <sys/socket.h>
  15 #include <netinet/in.h>
  16 #include <arpa/inet.h>
  17 #include <unistd.h>
  18 #include <fcntl.h>      // O_*
  19 #include <string.h>
  20 #include <limits.h>
  21 #include <stdarg.h>
  22 #include <signal.h>     // Signal handling
  23 #include <ident.h>      // AUTHIDENT
  24 #include <time.h>       // time(2)
  25 #include <ctype.h>
  26
  27 #define DEBUG_TRACE_CLIENT      0
  28 #define HACK_NO_REFUNDS 1
  29
  30 #define PIDFILE "/var/run/dispsrv.pid"
  31
  32 // Statistics
  33 #define MAX_CONNECTION_QUEUE    5
  34 #define INPUT_BUFFER_SIZE       256
  35 #define CLIENT_TIMEOUT  10      // Seconds
  36
  37 #define HASH_TYPE       SHA1
  38 #define HASH_LENGTH     20
  39
  40 #define MSG_STR_TOO_LONG        "499 Command too long (limit "EXPSTR(INPUT_BUFFER_SIZE)")\n"
  41
  42 #define IDENT_TRUSTED_NETWORK 0x825F0D00
  43 #define IDENT_TRUSTED_NETMASK 0xFFFFFFC0
  44
  45 // === TYPES ===
  46 typedef struct sClient
  47 {
  48          int    Socket; // Client socket ID
  49          int    ID;     // Client ID
  50
  51          int    bTrustedHost;
  52          int    bCanAutoAuth;   // Is the connection from a trusted host/port
  53
  54         char    *Username;
  55         char    Salt[9];
  56
  57          int    UID;
  58          int    EffectiveUID;
  59          int    bIsAuthed;
  60 }       tClient;
  61
  62 // === PROTOTYPES ===
  63 void    Server_Start(void);
  64 void    Server_Cleanup(void);
  65 void    Server_HandleClient(int Socket, int bTrustedHost, int bRootPort);
  66 void    Server_ParseClientCommand(tClient *Client, char *CommandString);
  67 // --- Commands ---
  68 void    Server_Cmd_USER(tClient *Client, char *Args);
  69 void    Server_Cmd_PASS(tClient *Client, char *Args);
  70 void    Server_Cmd_AUTOAUTH(tClient *Client, char *Args);
  71 void    Server_Cmd_AUTHIDENT(tClient *Client, char *Args);
  72 void    Server_Cmd_SETEUSER(tClient *Client, char *Args);
  73 void    Server_Cmd_ENUMITEMS(tClient *Client, char *Args);
  74 void    Server_Cmd_ITEMINFO(tClient *Client, char *Args);
  75 void    Server_Cmd_DISPENSE(tClient *Client, char *Args);
  76 void    Server_Cmd_REFUND(tClient *Client, char *Args);
  77 void    Server_Cmd_GIVE(tClient *Client, char *Args);
  78 void    Server_Cmd_DONATE(tClient *Client, char *Args);
  79 void    Server_Cmd_ADD(tClient *Client, char *Args);
  80 void    Server_Cmd_SET(tClient *Client, char *Args);
  81 void    Server_Cmd_ENUMUSERS(tClient *Client, char *Args);
  82 void    Server_Cmd_USERINFO(tClient *Client, char *Args);
  83 void    _SendUserInfo(tClient *Client, int UserID);
  84 void    Server_Cmd_USERADD(tClient *Client, char *Args);
  85 void    Server_Cmd_USERFLAGS(tClient *Client, char *Args);
  86 void    Server_Cmd_UPDATEITEM(tClient *Client, char *Args);
  87 void    Server_Cmd_PINCHECK(tClient *Client, char *Args);
  88 void    Server_Cmd_PINSET(tClient *Client, char *Args);
  89 // --- Helpers ---
  90 void    Debug(tClient *Client, const char *Format, ...);
  91  int    sendf(int Socket, const char *Format, ...);
  92  int    Server_int_ParseArgs(int bUseLongArg, char *ArgStr, ...);
  93  int    Server_int_ParseFlags(tClient *Client, const char *Str, int *Mask, int *Value);
  94
  95 // === CONSTANTS ===
  96 // - Commands
  97 const struct sClientCommand {
  98         const char      *Name;
  99         void    (*Function)(tClient *Client, char *Arguments);
 100 }       gaServer_Commands[] = {
 101         {"USER", Server_Cmd_USER},
 102         {"PASS", Server_Cmd_PASS},
 103         {"AUTOAUTH", Server_Cmd_AUTOAUTH},
 104         {"AUTHIDENT", Server_Cmd_AUTHIDENT},
 105         {"SETEUSER", Server_Cmd_SETEUSER},
 106         {"ENUM_ITEMS", Server_Cmd_ENUMITEMS},
 107         {"ITEM_INFO", Server_Cmd_ITEMINFO},
 108         {"DISPENSE", Server_Cmd_DISPENSE},
 109         {"REFUND", Server_Cmd_REFUND},
 110         {"GIVE", Server_Cmd_GIVE},
 111         {"DONATE", Server_Cmd_DONATE},
 112         {"ADD", Server_Cmd_ADD},
 113         {"SET", Server_Cmd_SET},
 114         {"ENUM_USERS", Server_Cmd_ENUMUSERS},
 115         {"USER_INFO", Server_Cmd_USERINFO},
 116         {"USER_ADD", Server_Cmd_USERADD},
 117         {"USER_FLAGS", Server_Cmd_USERFLAGS},
 118         {"UPDATE_ITEM", Server_Cmd_UPDATEITEM},
 119         {"PIN_CHECK", Server_Cmd_PINCHECK},
 120         {"PIN_SET", Server_Cmd_PINSET}
 121 };
 122 #define NUM_COMMANDS    ((int)(sizeof(gaServer_Commands)/sizeof(gaServer_Commands[0])))
 123
 124 // === GLOBALS ===
 125 // - Configuration
 126  int    giServer_Port = 11020;
 127  int    gbServer_RunInBackground = 0;
 128 char    *gsServer_LogFile = "/var/log/dispsrv.log";
 129 char    *gsServer_ErrorLog = "/var/log/dispsrv.err";
 130  int    giServer_NumTrustedHosts;
 131 struct in_addr  *gaServer_TrustedHosts;
 132 // - State variables
 133  int    giServer_Socket;        // Server socket
 134  int    giServer_NextClientID = 1;      // Debug client ID
 135
 136
 137 // === CODE ===
 138 /**
 139  * \brief Open listenting socket and serve connections
 140  */
 141 void Server_Start(void)
 142 {
 143          int    client_socket;
 144         struct sockaddr_in      server_addr, client_addr;
 145
 146         // Parse trusted hosts list
 147         giServer_NumTrustedHosts = Config_GetValueCount("trusted_host");
 148         gaServer_TrustedHosts = malloc(giServer_NumTrustedHosts * sizeof(*gaServer_TrustedHosts));
 149         for( int i = 0; i < giServer_NumTrustedHosts; i ++ )
 150         {
 151                 const char      *addr = Config_GetValue("trusted_host", i);
 152
 153                 if( inet_aton(addr, &gaServer_TrustedHosts[i]) == 0 ) {
 154                         fprintf(stderr, "Invalid IP address '%s'\n", addr);
 155                         continue ;
 156                 }
 157         }
 158
 159         // Ignore SIGPIPE (stops crashes when the client exits early)
 160         signal(SIGPIPE, SIG_IGN);
 161
 162         // Create Server
 163         giServer_Socket = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 164         if( giServer_Socket < 0 ) {
 165                 fprintf(stderr, "ERROR: Unable to create server socket\n");
 166                 return ;
 167         }
 168
 169         // Make listen address
 170         memset(&server_addr, 0, sizeof(server_addr));
 171         server_addr.sin_family = AF_INET;       // Internet Socket
 172         server_addr.sin_addr.s_addr = htonl(INADDR_ANY);        // Listen on all interfaces
 173         server_addr.sin_port = htons(giServer_Port);    // Port
 174
 175         // Bind
 176         if( bind(giServer_Socket, (struct sockaddr *) &server_addr, sizeof(server_addr)) < 0 ) {
 177                 fprintf(stderr, "ERROR: Unable to bind to 0.0.0.0:%i\n", giServer_Port);
 178                 perror("Binding");
 179                 close(giServer_Socket);
 180                 return ;
 181         }
 182
 183         // Fork into background
 184         if( gbServer_RunInBackground )
 185         {
 186                 int pid = fork();
 187                 if( pid == -1 ) {
 188                         fprintf(stderr, "ERROR: Unable to fork\n");
 189                         perror("fork background");
 190                         exit(-1);
 191                 }
 192                 if( pid != 0 ) {
 193                         // Parent, quit
 194                         Debug_Notice("Forked child server as PID %i\n", pid);
 195                         exit(0);
 196                 }
 197                 // In child
 198                 // - Sort out stdin/stdout
 199                 #if 0
 200                 dup2( open("/dev/null", O_RDONLY, 0644), STDIN_FILENO );
 201                 dup2( open(gsServer_LogFile, O_CREAT|O_APPEND, 0644), STDOUT_FILENO );
 202                 dup2( open(gsServer_ErrorLog, O_CREAT|O_APPEND, 0644), STDERR_FILENO );
 203                 #else
 204                 freopen("/dev/null", "r", stdin);
 205                 freopen(gsServer_LogFile, "a", stdout);
 206                 freopen(gsServer_ErrorLog, "a", stderr);
 207                 fprintf(stdout, "OpenDispense 2 Server Started at %lld\n", (long long)time(NULL));
 208                 fprintf(stderr, "OpenDispense 2 Server Started at %lld\n", (long long)time(NULL));
 209                 #endif
 210         }
 211         atexit(Server_Cleanup);
 212
 213         // Start the helper thread
 214         StartPeriodicThread();
 215
 216         // Listen
 217         if( listen(giServer_Socket, MAX_CONNECTION_QUEUE) < 0 ) {
 218                 fprintf(stderr, "ERROR: Unable to listen to socket\n");
 219                 perror("Listen");
 220                 return ;
 221         }
 222
 223         Debug_Notice("Listening on 0.0.0.0:%i", giServer_Port);
 224
 225         // write pidfile
 226         {
 227                 FILE *fp = fopen(PIDFILE, "w");
 228                 if( fp ) {
 229                         fprintf(fp, "%i", getpid());
 230                         fclose(fp);
 231                 }
 232         }
 233
 234         for(;;)
 235         {
 236                 uint    len = sizeof(client_addr);
 237                  int    bTrusted = 0;
 238                  int    bRootPort = 0;
 239
 240                 // Accept a connection
 241                 client_socket = accept(giServer_Socket, (struct sockaddr *) &client_addr, &len);
 242                 if(client_socket < 0) {
 243                         fprintf(stderr, "ERROR: Unable to accept client connection\n");
 244                         return ;
 245                 }
 246
 247                 // Set a timeout on the user conneciton
 248                 {
 249                         struct timeval tv;
 250                         tv.tv_sec = CLIENT_TIMEOUT;
 251                         tv.tv_usec = 0;
 252                         if( setsockopt(client_socket, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) )
 253                         {
 254                                 perror("setsockopt");
 255                                 return ;
 256                         }
 257                 }
 258
 259                 // Debug: Print the connection string
 260                 if(giDebugLevel >= 2) {
 261                         char    ipstr[INET_ADDRSTRLEN];
 262                         inet_ntop(AF_INET, &client_addr.sin_addr, ipstr, INET_ADDRSTRLEN);
 263                         Debug_Debug("Client connection from %s:%i",
 264                                 ipstr, ntohs(client_addr.sin_port));
 265                 }
 266
 267                 // Doesn't matter what, localhost is trusted
 268                 if( ntohl( client_addr.sin_addr.s_addr ) == 0x7F000001 )
 269                         bTrusted = 1;
 270
 271                 // Check if the host is on the trusted list
 272                 for( int i = 0; i < giServer_NumTrustedHosts; i ++ )
 273                 {
 274                         if( memcmp(&client_addr.sin_addr, &gaServer_TrustedHosts[i], sizeof(struct in_addr)) == 0 )
 275                         {
 276                                 bTrusted = 1;
 277                                 break;
 278                         }
 279                 }
 280
 281                 // Root port (can AUTOAUTH if also a trusted machine
 282                 if( ntohs(client_addr.sin_port) < 1024 )
 283                         bRootPort = 1;
 284
 285                 #if 0
 286                 {
 287                         // TODO: Make this runtime configurable
 288                         switch( ntohl( client_addr.sin_addr.s_addr ) )
 289                         {
 290                         case 0x7F000001:        // 127.0.0.1    localhost
 291                 //      case 0x825F0D00:        // 130.95.13.0
 292                         case 0x825F0D04:        // 130.95.13.4  merlo
 293                 //      case 0x825F0D05:        // 130.95.13.5  heathred (MR)
 294                         case 0x825F0D07:        // 130.95.13.7  motsugo
 295                         case 0x825F0D11:        // 130.95.13.17 mermaid
 296                         case 0x825F0D12:        // 130.95.13.18 mussel
 297                         case 0x825F0D17:        // 130.95.13.23 martello
 298                         case 0x825F0D2A:        // 130.95.13.42 meersau
 299                 //      case 0x825F0D42:        // 130.95.13.66 heathred (Clubroom)
 300                                 bTrusted = 1;
 301                                 break;
 302                         default:
 303                                 break;
 304                         }
 305                 }
 306                 #endif
 307
 308                 // TODO: Multithread this?
 309                 Server_HandleClient(client_socket, bTrusted, bRootPort);
 310
 311                 close(client_socket);
 312         }
 313 }
 314
 315 void Server_Cleanup(void)
 316 {
 317         Debug_Debug("Close(%i)", giServer_Socket);
 318         close(giServer_Socket);
 319         unlink(PIDFILE);
 320 }
 321
 322 /**
 323  * \brief Reads from a client socket and parses the command strings
 324  * \param Socket        Client socket number/handle
 325  * \param bTrusted      Is the client trusted?
 326  */
 327 void Server_HandleClient(int Socket, int bTrusted, int bRootPort)
 328 {
 329         char    inbuf[INPUT_BUFFER_SIZE];
 330         char    *buf = inbuf;
 331          int    remspace = INPUT_BUFFER_SIZE-1;
 332          int    bytes = -1;
 333         tClient clientInfo;
 334
 335         memset(&clientInfo, 0, sizeof(clientInfo));
 336
 337         // Initialise Client info
 338         clientInfo.Socket = Socket;
 339         clientInfo.ID = giServer_NextClientID ++;
 340         clientInfo.bTrustedHost = bTrusted;
 341         clientInfo.bCanAutoAuth = bTrusted && bRootPort;
 342         clientInfo.EffectiveUID = -1;
 343
 344         // Read from client
 345         /*
 346          * Notes:
 347          * - The `buf` and `remspace` variables allow a line to span several
 348          *   calls to recv(), if a line is not completed in one recv() call
 349          *   it is saved to the beginning of `inbuf` and `buf` is updated to
 350          *   the end of it.
 351          */
 352         // TODO: Use select() instead (to give a timeout)
 353         while( (bytes = recv(Socket, buf, remspace, 0)) > 0 )
 354         {
 355                 char    *eol, *start;
 356                 buf[bytes] = '\0';      // Allow us to use stdlib string functions on it
 357
 358                 // Split by lines
 359                 start = inbuf;
 360                 while( (eol = strchr(start, '\n')) )
 361                 {
 362                         *eol = '\0';
 363
 364                         Server_ParseClientCommand(&clientInfo, start);
 365
 366                         start = eol + 1;
 367                 }
 368
 369                 // Check if there was an incomplete line
 370                 if( *start != '\0' ) {
 371                          int    tailBytes = bytes - (start-buf);
 372                         // Roll back in buffer
 373                         memcpy(inbuf, start, tailBytes);
 374                         remspace -= tailBytes;
 375                         if(remspace == 0) {
 376                                 send(Socket, MSG_STR_TOO_LONG, sizeof(MSG_STR_TOO_LONG), 0);
 377                                 buf = inbuf;
 378                                 remspace = INPUT_BUFFER_SIZE - 1;
 379                         }
 380                 }
 381                 else {
 382                         buf = inbuf;
 383                         remspace = INPUT_BUFFER_SIZE - 1;
 384                 }
 385         }
 386
 387         // Check for errors
 388         if( bytes < 0 ) {
 389                 fprintf(stderr, "ERROR: Unable to recieve from client on socket %i\n", Socket);
 390                 return ;
 391         }
 392
 393         if(giDebugLevel >= 2) {
 394                 printf("Client %i: Disconnected\n", clientInfo.ID);
 395         }
 396 }
 397
 398 /**
 399  * \brief Parses a client command and calls the required helper function
 400  * \param Client        Pointer to client state structure
 401  * \param CommandString Command from client (single line of the command)
 402  * \return Heap String to return to the client
 403  */
 404 void Server_ParseClientCommand(tClient *Client, char *CommandString)
 405 {
 406         char    *command, *args;
 407          int    i;
 408
 409         if( giDebugLevel >= 2 )
 410                 Debug(Client, "Server_ParseClientCommand: (CommandString = '%s')", CommandString);
 411
 412         if( Server_int_ParseArgs(1, CommandString, &command, &args, NULL) )
 413         {
 414                 if( command == NULL )   return ;
 415                 // Is this an error? (just ignore for now)
 416         }
 417
 418
 419         // Find command
 420         for( i = 0; i < NUM_COMMANDS; i++ )
 421         {
 422                 if(strcmp(command, gaServer_Commands[i].Name) == 0) {
 423                         if( giDebugLevel >= 2 )
 424                                 Debug(Client, "CMD %s - \"%s\"", command, args);
 425                         gaServer_Commands[i].Function(Client, args);
 426                         return ;
 427                 }
 428         }
 429
 430         sendf(Client->Socket, "400 Unknown Command\n");
 431 }
 432
 433 // ---
 434 // Commands
 435 // ---
 436 /**
 437  * \brief Set client username
 438  *
 439  * Usage: USER <username>
 440  */
 441 void Server_Cmd_USER(tClient *Client, char *Args)
 442 {
 443         char    *username;
 444
 445         if( Server_int_ParseArgs(0, Args, &username, NULL) )
 446         {
 447                 sendf(Client->Socket, "407 USER takes 1 argument\n");
 448                 return ;
 449         }
 450
 451         // Debug!
 452         if( giDebugLevel )
 453                 Debug(Client, "Authenticating as '%s'", username);
 454
 455         // Save username
 456         if(Client->Username)
 457                 free(Client->Username);
 458         Client->Username = strdup(username);
 459
 460         #if USE_SALT
 461         // Create a salt (that changes if the username is changed)
 462         // Yes, I know, I'm a little paranoid, but who isn't?
 463         Client->Salt[0] = 0x21 + (rand()&0x3F);
 464         Client->Salt[1] = 0x21 + (rand()&0x3F);
 465         Client->Salt[2] = 0x21 + (rand()&0x3F);
 466         Client->Salt[3] = 0x21 + (rand()&0x3F);
 467         Client->Salt[4] = 0x21 + (rand()&0x3F);
 468         Client->Salt[5] = 0x21 + (rand()&0x3F);
 469         Client->Salt[6] = 0x21 + (rand()&0x3F);
 470         Client->Salt[7] = 0x21 + (rand()&0x3F);
 471
 472         // TODO: Also send hash type to use, (SHA1 or crypt according to [DAA])
 473         sendf(Client->Socket, "100 SALT %s\n", Client->Salt);
 474         #else
 475         sendf(Client->Socket, "100 User Set\n");
 476         #endif
 477 }
 478
 479 /**
 480  * \brief Authenticate as a user
 481  *
 482  * Usage: PASS <hash>
 483  */
 484 void Server_Cmd_PASS(tClient *Client, char *Args)
 485 {
 486         char    *passhash;
 487          int    flags;
 488
 489         if( Server_int_ParseArgs(0, Args, &passhash, NULL) )
 490         {
 491                 sendf(Client->Socket, "407 PASS takes 1 argument\n");
 492                 return ;
 493         }
 494
 495         // Pass on to cokebank
 496         Client->UID = Bank_GetUserAuth(Client->Salt, Client->Username, passhash);
 497
 498         if( Client->UID == -1 ) {
 499                 sendf(Client->Socket, "401 Auth Failure\n");
 500                 return ;
 501         }
 502
 503         flags = Bank_GetFlags(Client->UID);
 504         if( flags & USER_FLAG_DISABLED ) {
 505                 Client->UID = -1;
 506                 sendf(Client->Socket, "403 Account Disabled\n");
 507                 return ;
 508         }
 509         if( flags & USER_FLAG_INTERNAL ) {
 510                 Client->UID = -1;
 511                 sendf(Client->Socket, "403 Internal account\n");
 512                 return ;
 513         }
 514
 515         Client->bIsAuthed = 1;
 516         sendf(Client->Socket, "200 Auth OK\n");
 517 }
 518
 519 /**
 520  * \brief Authenticate as a user without a password
 521  *
 522  * Usage: AUTOAUTH <user>
 523  */
 524 void Server_Cmd_AUTOAUTH(tClient *Client, char *Args)
 525 {
 526         char    *username;
 527          int    userflags;
 528
 529         if( Server_int_ParseArgs(0, Args, &username, NULL) )
 530         {
 531                 sendf(Client->Socket, "407 AUTOAUTH takes 1 argument\n");
 532                 return ;
 533         }
 534
 535         // Check if trusted
 536         if( !Client->bCanAutoAuth ) {
 537                 if(giDebugLevel)
 538                         Debug(Client, "Untrusted client attempting to AUTOAUTH");
 539                 sendf(Client->Socket, "401 Untrusted\n");
 540                 return ;
 541         }
 542
 543         // Get UID
 544         Client->UID = Bank_GetAcctByName( username, 0 );
 545         if( Client->UID < 0 ) {
 546                 if(giDebugLevel)
 547                         Debug(Client, "Unknown user '%s'", username);
 548                 sendf(Client->Socket, "403 Auth Failure\n");
 549                 return ;
 550         }
 551
 552         userflags = Bank_GetFlags(Client->UID);
 553         // You can't be an internal account
 554         if( userflags & USER_FLAG_INTERNAL ) {
 555                 if(giDebugLevel)
 556                         Debug(Client, "Autoauth as '%s', not allowed", username);
 557                 Client->UID = -1;
 558                 sendf(Client->Socket, "403 Account is internal\n");
 559                 return ;
 560         }
 561
 562         // Disabled accounts
 563         if( userflags & USER_FLAG_DISABLED ) {
 564                 Client->UID = -1;
 565                 sendf(Client->Socket, "403 Account disabled\n");
 566                 return ;
 567         }
 568
 569         // Save username
 570         if(Client->Username)
 571                 free(Client->Username);
 572         Client->Username = strdup(username);
 573
 574         Client->bIsAuthed = 1;
 575
 576         if(giDebugLevel)
 577                 Debug(Client, "Auto authenticated as '%s' (%i)", username, Client->UID);
 578
 579         sendf(Client->Socket, "200 Auth OK\n");
 580 }
 581
 582 /**
 583  * \brief Authenticate as a user using the IDENT protocol
 584  *
 585  * Usage: AUTHIDENT
 586  */
 587 void Server_Cmd_AUTHIDENT(tClient *Client, char *Args)
 588 {
 589         char    *username;
 590          int    userflags;
 591         const int ident_timeout = 5;
 592
 593         if( Args != NULL && strlen(Args) ) {
 594                 sendf(Client->Socket, "407 AUTHIDENT takes no arguments\n");
 595                 return ;
 596         }
 597
 598         // Check if trusted
 599         if( !Client->bTrustedHost ) {
 600                 if(giDebugLevel)
 601                         Debug(Client, "Untrusted client attempting to AUTHIDENT");
 602                 sendf(Client->Socket, "401 Untrusted\n");
 603                 return ;
 604         }
 605
 606         // Get username via IDENT
 607         username = ident_id(Client->Socket, ident_timeout);
 608         if( !username ) {
 609                 perror("AUTHIDENT - IDENT timed out");
 610                 sendf(Client->Socket, "403 Authentication failure: IDENT auth timed out\n");
 611                 return ;
 612         }
 613
 614         // Get UID
 615         Client->UID = Bank_GetAcctByName( username, 0 );
 616         if( Client->UID < 0 ) {
 617                 if(giDebugLevel)
 618                         Debug(Client, "Unknown user '%s'", username);
 619                 sendf(Client->Socket, "403 Authentication failure: unknown account\n");
 620                 free(username);
 621                 return ;
 622         }
 623
 624         userflags = Bank_GetFlags(Client->UID);
 625         // You can't be an internal account
 626         if( userflags & USER_FLAG_INTERNAL ) {
 627                 if(giDebugLevel)
 628                         Debug(Client, "IDENT auth as '%s', not allowed", username);
 629                 Client->UID = -1;
 630                 sendf(Client->Socket, "403 Authentication failure: that account is internal\n");
 631                 free(username);
 632                 return ;
 633         }
 634
 635         // Disabled accounts
 636         if( userflags & USER_FLAG_DISABLED ) {
 637                 Client->UID = -1;
 638                 sendf(Client->Socket, "403 Authentication failure: account disabled\n");
 639                 free(username);
 640                 return ;
 641         }
 642
 643         // Save username
 644         if(Client->Username)
 645                 free(Client->Username);
 646         Client->Username = strdup(username);
 647
 648         Client->bIsAuthed = 1;
 649
 650         if(giDebugLevel)
 651                 Debug(Client, "IDENT authenticated as '%s' (%i)", username, Client->UID);
 652         free(username);
 653
 654         sendf(Client->Socket, "200 Auth OK\n");
 655 }
 656
 657 /**
 658  * \brief Set effective user
 659  */
 660 void Server_Cmd_SETEUSER(tClient *Client, char *Args)
 661 {
 662         char    *username;
 663          int    eUserFlags, userFlags;
 664
 665         if( Server_int_ParseArgs(0, Args, &username, NULL) )
 666         {
 667                 sendf(Client->Socket, "407 SETEUSER takes 1 argument\n");
 668                 return ;
 669         }
 670
 671         if( !strlen(Args) ) {
 672                 sendf(Client->Socket, "407 SETEUSER expects an argument\n");
 673                 return ;
 674         }
 675
 676         // Check authentication
 677         if( !Client->bIsAuthed ) {
 678                 sendf(Client->Socket, "401 Not Authenticated\n");
 679                 return ;
 680         }
 681
 682         // Check user permissions
 683         userFlags = Bank_GetFlags(Client->UID);
 684         if( !(userFlags & (USER_FLAG_COKE|USER_FLAG_ADMIN)) ) {
 685                 sendf(Client->Socket, "403 Not in coke\n");
 686                 return ;
 687         }
 688
 689         // Set id
 690         Client->EffectiveUID = Bank_GetAcctByName(username, 0);
 691         if( Client->EffectiveUID == -1 ) {
 692                 sendf(Client->Socket, "404 User not found\n");
 693                 return ;
 694         }
 695         // You can't be an internal account (unless you're an admin)
 696         if( !(userFlags & USER_FLAG_ADMIN) )
 697         {
 698                 eUserFlags = Bank_GetFlags(Client->EffectiveUID);
 699                 if( eUserFlags & USER_FLAG_INTERNAL ) {
 700                         Client->EffectiveUID = -1;
 701                         sendf(Client->Socket, "404 User not found\n");
 702                         return ;
 703                 }
 704         }
 705
 706         // Disabled accounts
 707         // - If disabled and the actual user is not an admin (and not root)
 708         //   return 403
 709         if( (eUserFlags & USER_FLAG_DISABLED) && (Client->UID == 0 || !(userFlags & USER_FLAG_ADMIN)) ) {
 710                 Client->EffectiveUID = -1;
 711                 sendf(Client->Socket, "403 Account disabled\n");
 712                 return ;
 713         }
 714
 715         sendf(Client->Socket, "200 User set\n");
 716 }
 717
 718 /**
 719  * \brief Send an item status to the client
 720  * \param Client        Who to?
 721  * \param Item  Item to send
 722  */
 723 void Server_int_SendItem(tClient *Client, tItem *Item)
 724 {
 725         char    *status = "avail";
 726
 727         if( Item->Handler->CanDispense )
 728         {
 729                 switch(Item->Handler->CanDispense(Client->UID, Item->ID))
 730                 {
 731                 case  0:        status = "avail";       break;
 732                 case  1:        status = "sold";        break;
 733                 default:
 734                 case -1:        status = "error";       break;
 735                 }
 736         }
 737
 738         if( !gbNoCostMode && Item->Price == 0 )
 739                 status = "error";
 740         // KNOWN HACK: Naming a slot 'dead' disables it
 741         if( strcmp(Item->Name, "dead") == 0 )
 742                 status = "sold";        // Another status?
 743
 744         sendf(Client->Socket,
 745                 "202 Item %s:%i %s %i %s\n",
 746                 Item->Handler->Name, Item->ID, status, Item->Price, Item->Name
 747                 );
 748 }
 749
 750 /**
 751  * \brief Enumerate the items that the server knows about
 752  */
 753 void Server_Cmd_ENUMITEMS(tClient *Client, char *Args)
 754 {
 755          int    i, count;
 756
 757         if( Args != NULL && strlen(Args) ) {
 758                 sendf(Client->Socket, "407 ENUM_ITEMS takes no arguments\n");
 759                 return ;
 760         }
 761
 762         // Count shown items
 763         count = 0;
 764         for( i = 0; i < giNumItems; i ++ ) {
 765                 if( gaItems[i].bHidden )        continue;
 766                 count ++;
 767         }
 768
 769         sendf(Client->Socket, "201 Items %i\n", count);
 770
 771         for( i = 0; i < giNumItems; i ++ ) {
 772                 if( gaItems[i].bHidden )        continue;
 773                 Server_int_SendItem( Client, &gaItems[i] );
 774         }
 775
 776         sendf(Client->Socket, "200 List end\n");
 777 }
 778
 779 tItem *_GetItemFromString(char *String)
 780 {
 781         tHandler        *handler;
 782         char    *type = String;
 783         char    *colon = strchr(String, ':');
 784          int    num, i;
 785
 786         if( !colon ) {
 787                 return NULL;
 788         }
 789
 790         num = atoi(colon+1);
 791         *colon = '\0';
 792
 793         // Find handler
 794         handler = NULL;
 795         for( i = 0; i < giNumHandlers; i ++ )
 796         {
 797                 if( strcmp(gaHandlers[i]->Name, type) == 0) {
 798                         handler = gaHandlers[i];
 799                         break;
 800                 }
 801         }
 802         if( !handler ) {
 803                 return NULL;
 804         }
 805
 806         // Find item
 807         for( i = 0; i < giNumItems; i ++ )
 808         {
 809                 if( gaItems[i].Handler != handler )     continue;
 810                 if( gaItems[i].ID != num )      continue;
 811                 return &gaItems[i];
 812         }
 813         return NULL;
 814 }
 815
 816 /**
 817  * \brief Fetch information on a specific item
 818  *
 819  * Usage: ITEMINFO <item ID>
 820  */
 821 void Server_Cmd_ITEMINFO(tClient *Client, char *Args)
 822 {
 823         tItem   *item;
 824         char    *itemname;
 825
 826         if( Server_int_ParseArgs(0, Args, &itemname, NULL) ) {
 827                 sendf(Client->Socket, "407 ITEMINFO takes 1 argument\n");
 828                 return ;
 829         }
 830         item = _GetItemFromString(Args);
 831
 832         if( !item ) {
 833                 sendf(Client->Socket, "406 Bad Item ID\n");
 834                 return ;
 835         }
 836
 837         Server_int_SendItem( Client, item );
 838 }
 839
 840 /**
 841  * \brief Dispense an item
 842  *
 843  * Usage: DISPENSE <Item ID>
 844  */
 845 void Server_Cmd_DISPENSE(tClient *Client, char *Args)
 846 {
 847         tItem   *item;
 848          int    ret;
 849          int    uid;
 850         char    *itemname;
 851
 852         if( Server_int_ParseArgs(0, Args, &itemname, NULL) ) {
 853                 sendf(Client->Socket, "407 DISPENSE takes only 1 argument\n");
 854                 return ;
 855         }
 856
 857         if( !Client->bIsAuthed ) {
 858                 sendf(Client->Socket, "401 Not Authenticated\n");
 859                 return ;
 860         }
 861
 862         item = _GetItemFromString(itemname);
 863         if( !item ) {
 864                 sendf(Client->Socket, "406 Bad Item ID\n");
 865                 return ;
 866         }
 867
 868         if( Client->EffectiveUID != -1 ) {
 869                 uid = Client->EffectiveUID;
 870         }
 871         else {
 872                 uid = Client->UID;
 873         }
 874
 875 //      if( Bank_GetFlags(Client->UID) & USER_FLAG_DISABLED  ) {
 876 //      }
 877
 878         switch( ret = DispenseItem( Client->UID, uid, item ) )
 879         {
 880         case 0: sendf(Client->Socket, "200 Dispense OK\n");     return ;
 881         case 1: sendf(Client->Socket, "501 Unable to dispense\n");      return ;
 882         case 2: sendf(Client->Socket, "402 Poor You\n");        return ;
 883         default:
 884                 sendf(Client->Socket, "500 Dispense Error (%i)\n", ret);
 885                 return ;
 886         }
 887 }
 888
 889 /**
 890  * \brief Refund an item to a user
 891  *
 892  * Usage: REFUND <user> <item id> [<price>]
 893  */
 894 void Server_Cmd_REFUND(tClient *Client, char *Args)
 895 {
 896         tItem   *item;
 897          int    uid, price_override = 0;
 898         char    *username, *itemname, *price_str;
 899
 900         if( Server_int_ParseArgs(0, Args, &username, &itemname, &price_str, NULL) ) {
 901                 if( !itemname || price_str ) {
 902                         sendf(Client->Socket, "407 REFUND takes 2 or 3 arguments\n");
 903                         return ;
 904                 }
 905         }
 906
 907         if( !Client->bIsAuthed ) {
 908                 sendf(Client->Socket, "401 Not Authenticated\n");
 909                 return ;
 910         }
 911
 912         // Check user permissions
 913         if( !(Bank_GetFlags(Client->UID) & (USER_FLAG_COKE|USER_FLAG_ADMIN))  ) {
 914                 sendf(Client->Socket, "403 Not in coke\n");
 915                 return ;
 916         }
 917
 918         uid = Bank_GetAcctByName(username, 0);
 919         if( uid == -1 ) {
 920                 sendf(Client->Socket, "404 Unknown user\n");
 921                 return ;
 922         }
 923
 924         item = _GetItemFromString(itemname);
 925         if( !item ) {
 926                 sendf(Client->Socket, "406 Bad Item ID\n");
 927                 return ;
 928         }
 929
 930         if( price_str )
 931                 price_override = atoi(price_str);
 932
 933         switch( DispenseRefund( Client->UID, uid, item, price_override ) )
 934         {
 935         case 0: sendf(Client->Socket, "200 Item Refunded\n");   return ;
 936         default:
 937                 sendf(Client->Socket, "500 Dispense Error\n");
 938                 return;
 939         }
 940 }
 941
 942 /**
 943  * \brief Transfer money to another account
 944  *
 945  * Usage: GIVE <dest> <ammount> <reason...>
 946  */
 947 void Server_Cmd_GIVE(tClient *Client, char *Args)
 948 {
 949         char    *recipient, *ammount, *reason;
 950          int    uid, iAmmount;
 951          int    thisUid;
 952
 953         // Parse arguments
 954         if( Server_int_ParseArgs(1, Args, &recipient, &ammount, &reason, NULL) ) {
 955                 sendf(Client->Socket, "407 GIVE takes only 3 arguments\n");
 956                 return ;
 957         }
 958
 959         // Check for authed
 960         if( !Client->bIsAuthed ) {
 961                 sendf(Client->Socket, "401 Not Authenticated\n");
 962                 return ;
 963         }
 964
 965         // Get recipient
 966         uid = Bank_GetAcctByName(recipient, 0);
 967         if( uid == -1 ) {
 968                 sendf(Client->Socket, "404 Invalid target user\n");
 969                 return ;
 970         }
 971
 972         // You can't alter an internal account
 973 //      if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
 974 //              sendf(Client->Socket, "404 Invalid target user\n");
 975 //              return ;
 976 //      }
 977
 978         // Parse ammount
 979         iAmmount = atoi(ammount);
 980         if( iAmmount <= 0 ) {
 981                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
 982                 return ;
 983         }
 984
 985         if( Client->EffectiveUID != -1 ) {
 986                 thisUid = Client->EffectiveUID;
 987         }
 988         else {
 989                 thisUid = Client->UID;
 990         }
 991
 992         // Do give
 993         switch( DispenseGive(Client->UID, thisUid, uid, iAmmount, reason) )
 994         {
 995         case 0:
 996                 sendf(Client->Socket, "200 Give OK\n");
 997                 return ;
 998         case 2:
 999                 sendf(Client->Socket, "402 Poor You\n");
1000                 return ;
1001         default:
1002                 sendf(Client->Socket, "500 Unknown error\n");
1003                 return ;
1004         }
1005 }
1006
1007 void Server_Cmd_DONATE(tClient *Client, char *Args)
1008 {
1009         char    *ammount, *reason;
1010          int    iAmmount;
1011          int    thisUid;
1012
1013         // Parse arguments
1014         if( Server_int_ParseArgs(1, Args, &ammount, &reason, NULL) ) {
1015                 sendf(Client->Socket, "407 DONATE takes 2 arguments\n");
1016                 return ;
1017         }
1018
1019         if( !Client->bIsAuthed ) {
1020                 sendf(Client->Socket, "401 Not Authenticated\n");
1021                 return ;
1022         }
1023
1024         // Parse ammount
1025         iAmmount = atoi(ammount);
1026         if( iAmmount <= 0 ) {
1027                 sendf(Client->Socket, "407 Invalid Argument, ammount must be > zero\n");
1028                 return ;
1029         }
1030
1031         // Handle effective users
1032         if( Client->EffectiveUID != -1 ) {
1033                 thisUid = Client->EffectiveUID;
1034         }
1035         else {
1036                 thisUid = Client->UID;
1037         }
1038
1039         // Do give
1040         switch( DispenseDonate(Client->UID, thisUid, iAmmount, reason) )
1041         {
1042         case 0:
1043                 sendf(Client->Socket, "200 Give OK\n");
1044                 return ;
1045         case 2:
1046                 sendf(Client->Socket, "402 Poor You\n");
1047                 return ;
1048         default:
1049                 sendf(Client->Socket, "500 Unknown error\n");
1050                 return ;
1051         }
1052 }
1053
1054 void Server_Cmd_ADD(tClient *Client, char *Args)
1055 {
1056         char    *user, *ammount, *reason;
1057          int    uid, iAmmount;
1058
1059         // Parse arguments
1060         if( Server_int_ParseArgs(1, Args, &user, &ammount, &reason, NULL) ) {
1061                 sendf(Client->Socket, "407 ADD takes 3 arguments\n");
1062                 return ;
1063         }
1064
1065         if( !Client->bIsAuthed ) {
1066                 sendf(Client->Socket, "401 Not Authenticated\n");
1067                 return ;
1068         }
1069
1070         // Check user permissions
1071         if( !(Bank_GetFlags(Client->UID) & (USER_FLAG_COKE|USER_FLAG_ADMIN))  ) {
1072                 sendf(Client->Socket, "403 Not in coke\n");
1073                 return ;
1074         }
1075
1076         #if !ROOT_CAN_ADD
1077         if( strcmp( Client->Username, "root" ) == 0 ) {
1078                 // Allow adding for new users
1079                 if( strcmp(reason, "treasurer: new user") != 0 ) {
1080                         sendf(Client->Socket, "403 Root may not add\n");
1081                         return ;
1082                 }
1083         }
1084         #endif
1085
1086         #if HACK_NO_REFUNDS
1087         if( strstr(reason, "refund") != NULL || strstr(reason, "misdispense") != NULL )
1088         {
1089                 sendf(Client->Socket, "499 Don't use `dispense acct` for refunds, use `dispense refund` (and `dispense -G` to get item IDs)\n");
1090                 return ;
1091         }
1092         #endif
1093
1094         // Get recipient
1095         uid = Bank_GetAcctByName(user, 0);
1096         if( uid == -1 ) {
1097                 sendf(Client->Socket, "404 Invalid user\n");
1098                 return ;
1099         }
1100
1101         // You can't alter an internal account
1102         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) )
1103         {
1104                 if( Bank_GetFlags(uid) & USER_FLAG_INTERNAL ) {
1105                         sendf(Client->Socket, "403 Admin only\n");
1106                         return ;
1107                 }
1108                 // TODO: Maybe disallow changes to disabled?
1109         }
1110
1111         // Parse ammount
1112         iAmmount = atoi(ammount);
1113         if( iAmmount == 0 && ammount[0] != '0' ) {
1114                 sendf(Client->Socket, "407 Invalid Argument\n");
1115                 return ;
1116         }
1117
1118         // Do give
1119         switch( DispenseAdd(Client->UID, uid, iAmmount, reason) )
1120         {
1121         case 0:
1122                 sendf(Client->Socket, "200 Add OK\n");
1123                 return ;
1124         case 2:
1125                 sendf(Client->Socket, "402 Poor Guy\n");
1126                 return ;
1127         default:
1128                 sendf(Client->Socket, "500 Unknown error\n");
1129                 return ;
1130         }
1131 }
1132
1133 void Server_Cmd_SET(tClient *Client, char *Args)
1134 {
1135         char    *user, *ammount, *reason;
1136          int    uid, iAmmount;
1137
1138         // Parse arguments
1139         if( Server_int_ParseArgs(1, Args, &user, &ammount, &reason, NULL) ) {
1140                 sendf(Client->Socket, "407 SET takes 3 arguments\n");
1141                 return ;
1142         }
1143
1144         if( !Client->bIsAuthed ) {
1145                 sendf(Client->Socket, "401 Not Authenticated\n");
1146                 return ;
1147         }
1148
1149         // Check user permissions
1150         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN)  ) {
1151                 sendf(Client->Socket, "403 Not an admin\n");
1152                 return ;
1153         }
1154
1155         // Get recipient
1156         uid = Bank_GetAcctByName(user, 0);
1157         if( uid == -1 ) {
1158                 sendf(Client->Socket, "404 Invalid user\n");
1159                 return ;
1160         }
1161
1162         // Parse ammount
1163         iAmmount = atoi(ammount);
1164         if( iAmmount == 0 && ammount[0] != '0' ) {
1165                 sendf(Client->Socket, "407 Invalid Argument\n");
1166                 return ;
1167         }
1168
1169         int origBalance, rv;
1170         // Do give
1171         switch( rv = DispenseSet(Client->UID, uid, iAmmount, reason, &origBalance) )
1172         {
1173         case 0:
1174                 sendf(Client->Socket, "200 Add OK (%i)\n", origBalance);
1175                 return ;
1176         default:
1177                 sendf(Client->Socket, "500 Unknown error (%i)\n", rv);
1178                 return ;
1179         }
1180 }
1181
1182 void Server_Cmd_ENUMUSERS(tClient *Client, char *Args)
1183 {
1184          int    i, numRet = 0;
1185         tAcctIterator   *it;
1186          int    maxBal = INT_MAX, minBal = INT_MIN;
1187          int    flagMask = 0, flagVal = 0;
1188          int    sort = BANK_ITFLAG_SORT_NAME;
1189         time_t  lastSeenAfter=0, lastSeenBefore=0;
1190
1191          int    flags;  // Iterator flags
1192          int    balValue;       // Balance value for iterator
1193         time_t  timeValue;      // Time value for iterator
1194
1195         // Parse arguments
1196         if( Args && strlen(Args) )
1197         {
1198                 char    *space = Args, *type, *val;
1199                 do
1200                 {
1201                         type = space;
1202                         while(*type == ' ')     type ++;
1203                         // Get next space
1204                         space = strchr(space, ' ');
1205                         if(space)       *space = '\0';
1206
1207                         // Get type
1208                         val = strchr(type, ':');
1209                         if( val ) {
1210                                 *val = '\0';
1211                                 val ++;
1212
1213                                 // Types
1214                                 // - Minium Balance
1215                                 if( strcmp(type, "min_balance") == 0 ) {
1216                                         minBal = atoi(val);
1217                                 }
1218                                 // - Maximum Balance
1219                                 else if( strcmp(type, "max_balance") == 0 ) {
1220                                         maxBal = atoi(val);
1221                                 }
1222                                 // - Flags
1223                                 else if( strcmp(type, "flags") == 0 ) {
1224                                         if( Server_int_ParseFlags(Client, val, &flagMask, &flagVal) )
1225                                                 return ;
1226                                 }
1227                                 // - Last seen before timestamp
1228                                 else if( strcmp(type, "last_seen_before") == 0 ) {
1229                                         lastSeenAfter = atoll(val);
1230                                 }
1231                                 // - Last seen after timestamp
1232                                 else if( strcmp(type, "last_seen_after") == 0 ) {
1233                                         lastSeenAfter = atoll(val);
1234                                 }
1235                                 // - Sorting
1236                                 else if( strcmp(type, "sort") == 0 ) {
1237                                         char    *dash = strchr(val, '-');
1238                                         if( dash ) {
1239                                                 *dash = '\0';
1240                                                 dash ++;
1241                                         }
1242                                         if( strcmp(val, "name") == 0 ) {
1243                                                 sort = BANK_ITFLAG_SORT_NAME;
1244                                         }
1245                                         else if( strcmp(val, "balance") == 0 ) {
1246                                                 sort = BANK_ITFLAG_SORT_BAL;
1247                                         }
1248                                         else if( strcmp(val, "lastseen") == 0 ) {
1249                                                 sort = BANK_ITFLAG_SORT_LASTSEEN;
1250                                         }
1251                                         else {
1252                                                 sendf(Client->Socket, "407 Unknown sort field ('%s')\n", val);
1253                                                 return ;
1254                                         }
1255                                         // Handle sort direction
1256                                         if( dash ) {
1257                                                 if( strcmp(dash, "desc") == 0 ) {
1258                                                         sort |= BANK_ITFLAG_REVSORT;
1259                                                 }
1260                                                 else {
1261                                                         sendf(Client->Socket, "407 Unknown sort direction '%s'\n", dash);
1262                                                         return ;
1263                                                 }
1264                                                 dash[-1] = '-';
1265                                         }
1266                                 }
1267                                 else {
1268                                         sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s:%s'\n", type, val);
1269                                         return ;
1270                                 }
1271
1272                                 val[-1] = ':';
1273                         }
1274                         else {
1275                                 sendf(Client->Socket, "407 Unknown argument to ENUM_USERS '%s'\n", type);
1276                                 return ;
1277                         }
1278
1279                         // Eat whitespace
1280                         if( space ) {
1281                                 *space = ' ';   // Repair (to be nice)
1282                                 space ++;
1283                                 while(*space == ' ')    space ++;
1284                         }
1285                 }       while(space);
1286         }
1287
1288         // Create iterator
1289         if( maxBal != INT_MAX ) {
1290                 flags = sort|BANK_ITFLAG_MAXBALANCE;
1291                 balValue = maxBal;
1292         }
1293         else if( minBal != INT_MIN ) {
1294                 flags = sort|BANK_ITFLAG_MINBALANCE;
1295                 balValue = minBal;
1296         }
1297         else {
1298                 flags = sort;
1299                 balValue = 0;
1300         }
1301         if( lastSeenBefore ) {
1302                 timeValue = lastSeenBefore;
1303                 flags |= BANK_ITFLAG_SEENBEFORE;
1304         }
1305         else if( lastSeenAfter ) {
1306                 timeValue = lastSeenAfter;
1307                 flags |= BANK_ITFLAG_SEENAFTER;
1308         }
1309         else {
1310                 timeValue = 0;
1311         }
1312         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
1313
1314         // Get return number
1315         while( (i = Bank_IteratorNext(it)) != -1 )
1316         {
1317                 int bal = Bank_GetBalance(i);
1318
1319                 if( bal == INT_MIN )    continue;
1320
1321                 if( bal < minBal )      continue;
1322                 if( bal > maxBal )      continue;
1323
1324                 numRet ++;
1325         }
1326
1327         Bank_DelIterator(it);
1328
1329         // Send count
1330         sendf(Client->Socket, "201 Users %i\n", numRet);
1331
1332
1333         // Create iterator
1334         it = Bank_Iterator(flagMask, flagVal, flags, balValue, timeValue);
1335
1336         while( (i = Bank_IteratorNext(it)) != -1 )
1337         {
1338                 int bal = Bank_GetBalance(i);
1339
1340                 if( bal == INT_MIN )    continue;
1341
1342                 if( bal < minBal )      continue;
1343                 if( bal > maxBal )      continue;
1344
1345                 _SendUserInfo(Client, i);
1346         }
1347
1348         Bank_DelIterator(it);
1349
1350         sendf(Client->Socket, "200 List End\n");
1351 }
1352
1353 void Server_Cmd_USERINFO(tClient *Client, char *Args)
1354 {
1355          int    uid;
1356         char    *user;
1357
1358         // Parse arguments
1359         if( Server_int_ParseArgs(0, Args, &user, NULL) ) {
1360                 sendf(Client->Socket, "407 USER_INFO takes 1 argument\n");
1361                 return ;
1362         }
1363
1364         if( giDebugLevel )      Debug(Client, "User Info '%s'", user);
1365
1366         // Get recipient
1367         uid = Bank_GetAcctByName(user, 0);
1368
1369         if( giDebugLevel >= 2 ) Debug(Client, "uid = %i", uid);
1370         if( uid == -1 ) {
1371                 sendf(Client->Socket, "404 Invalid user\n");
1372                 return ;
1373         }
1374
1375         _SendUserInfo(Client, uid);
1376 }
1377
1378 void _SendUserInfo(tClient *Client, int UserID)
1379 {
1380         char    *type, *disabled="", *door="";
1381          int    flags = Bank_GetFlags(UserID);
1382
1383         if( flags & USER_FLAG_INTERNAL ) {
1384                 type = "internal";
1385         }
1386         else if( flags & USER_FLAG_COKE ) {
1387                 if( flags & USER_FLAG_ADMIN )
1388                         type = "coke,admin";
1389                 else
1390                         type = "coke";
1391         }
1392         else if( flags & USER_FLAG_ADMIN ) {
1393                 type = "admin";
1394         }
1395         else {
1396                 type = "user";
1397         }
1398
1399         if( flags & USER_FLAG_DISABLED )
1400                 disabled = ",disabled";
1401         if( flags & USER_FLAG_DOORGROUP )
1402                 door = ",door";
1403
1404         // TODO: User flags/type
1405         sendf(
1406                 Client->Socket, "202 User %s %i %s%s%s\n",
1407                 Bank_GetAcctName(UserID), Bank_GetBalance(UserID),
1408                 type, disabled, door
1409                 );
1410 }
1411
1412 void Server_Cmd_USERADD(tClient *Client, char *Args)
1413 {
1414         char    *username;
1415
1416         // Parse arguments
1417         if( Server_int_ParseArgs(0, Args, &username, NULL) ) {
1418                 sendf(Client->Socket, "407 USER_ADD takes 1 argument\n");
1419                 return ;
1420         }
1421
1422         // Check authentication
1423         if( !Client->bIsAuthed ) {
1424                 sendf(Client->Socket, "401 Not Authenticated\n");
1425                 return ;
1426         }
1427
1428         // Check permissions
1429         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1430                 sendf(Client->Socket, "403 Not a coke admin\n");
1431                 return ;
1432         }
1433
1434         // Try to create user
1435         if( Bank_CreateAcct(username) == -1 ) {
1436                 sendf(Client->Socket, "404 User exists\n");
1437                 return ;
1438         }
1439
1440         {
1441                 char    *thisName = Bank_GetAcctName(Client->UID);
1442                 Log_Info("Account '%s' created by '%s'", username, thisName);
1443                 free(thisName);
1444         }
1445
1446         sendf(Client->Socket, "200 User Added\n");
1447 }
1448
1449 void Server_Cmd_USERFLAGS(tClient *Client, char *Args)
1450 {
1451         char    *username, *flags, *reason=NULL;
1452          int    mask=0, value=0;
1453          int    uid;
1454
1455         // Parse arguments
1456         if( Server_int_ParseArgs(1, Args, &username, &flags, &reason, NULL) ) {
1457                 if( !flags ) {
1458                         sendf(Client->Socket, "407 USER_FLAGS takes at least 2 arguments\n");
1459                         return ;
1460                 }
1461                 reason = "";
1462         }
1463
1464         // Check authentication
1465         if( !Client->bIsAuthed ) {
1466                 sendf(Client->Socket, "401 Not Authenticated\n");
1467                 return ;
1468         }
1469
1470         // Check permissions
1471         if( !(Bank_GetFlags(Client->UID) & USER_FLAG_ADMIN) ) {
1472                 sendf(Client->Socket, "403 Not a coke admin\n");
1473                 return ;
1474         }
1475
1476         // Get UID
1477         uid = Bank_GetAcctByName(username, 0);
1478         if( uid == -1 ) {
1479                 sendf(Client->Socket, "404 User '%s' not found\n", username);
1480                 return ;
1481         }
1482
1483         // Parse flags
1484         if( Server_int_ParseFlags(Client, flags, &mask, &value) )
1485                 return ;
1486
1487         if( giDebugLevel )
1488                 Debug(Client, "Set %i(%s) flags to %x (masked %x)\n",
1489                         uid, username, mask, value);
1490
1491         // Apply flags
1492         Bank_SetFlags(uid, mask, value);
1493
1494         // Log the change
1495         Log_Info("Updated '%s' with flag set '%s' by '%s' - Reason: %s",
1496                 username, flags, Client->Username, reason);
1497
1498         // Return OK
1499         sendf(Client->Socket, "200 User Updated\n");
1500 }
1501
1502 void Server_Cmd_UPDATEITEM(tClient *Client, char *Args)
1503 {
1504         char    *itemname, *price_str, *description;
1505          int    price;
1506         tItem   *item;
1507
1508         if( Server_int_ParseArgs(1, Args, &itemname, &price_str, &description, NULL) ) {
1509                 sendf(Client->Socket, "407 UPDATE_ITEM takes 3 arguments\n");
1510                 return ;
1511         }
1512
1513         if( !Client->bIsAuthed ) {
1514                 sendf(Client->Socket, "401 Not Authenticated\n");
1515                 return ;
1516         }
1517
1518         // Check user permissions
1519         if( !(Bank_GetFlags(Client->UID) & (USER_FLAG_COKE|USER_FLAG_ADMIN))  ) {
1520                 sendf(Client->Socket, "403 Not in coke\n");
1521                 return ;
1522         }
1523
1524         item = _GetItemFromString(itemname);
1525         if( !item ) {
1526                 // TODO: Create item?
1527                 sendf(Client->Socket, "406 Bad Item ID\n");
1528                 return ;
1529         }
1530
1531         price = atoi(price_str);
1532         if( price <= 0 && price_str[0] != '0' ) {
1533                 sendf(Client->Socket, "407 Invalid price set\n");
1534         }
1535
1536         switch( DispenseUpdateItem( Client->UID, item, description, price ) )
1537         {
1538         case 0:
1539                 // Return OK
1540                 sendf(Client->Socket, "200 Item updated\n");
1541                 break;
1542         default:
1543                 break;
1544         }
1545 }
1546
1547 void Server_Cmd_PINCHECK(tClient *Client, char *Args)
1548 {
1549         char    *username, *pinstr;
1550          int    pin;
1551
1552         if( Server_int_ParseArgs(0, Args, &username, &pinstr, NULL) ) {
1553                 sendf(Client->Socket, "407 PIN_CHECK takes 2 arguments\n");
1554                 return ;
1555         }
1556
1557         if( !isdigit(pinstr[0]) || !isdigit(pinstr[1]) || !isdigit(pinstr[2]) || !isdigit(pinstr[3]) || pinstr[4] != '\0' ) {
1558                 sendf(Client->Socket, "407 PIN should be four digits\n");
1559                 return ;
1560         }
1561         pin = atoi(pinstr);
1562
1563         // Not authenticated? go away!
1564         if( !Client->bIsAuthed ) {
1565                 sendf(Client->Socket, "401 Not Authenticated\n");
1566                 return ;
1567         }
1568
1569         // Get user
1570         int uid = Bank_GetAcctByName(username, 0);
1571         if( uid == -1 ) {
1572                 sendf(Client->Socket, "404 User '%s' not found\n", username);
1573                 return ;
1574         }
1575
1576         // Check user permissions
1577         if( uid != Client->UID && !(Bank_GetFlags(Client->UID) & (USER_FLAG_COKE|USER_FLAG_ADMIN))  ) {
1578                 sendf(Client->Socket, "403 Not in coke\n");
1579                 return ;
1580         }
1581
1582         // Get the pin
1583         static time_t   last_wrong_pin_time;
1584         static int      backoff = 1;
1585         if( time(NULL) - last_wrong_pin_time < backoff ) {
1586                 sendf(Client->Socket, "407 Rate limited (%i seconds remaining)\n",
1587                         backoff - (time(NULL) - last_wrong_pin_time));
1588                 return ;
1589         }
1590         last_wrong_pin_time = time(NULL);
1591         if( !Bank_IsPinValid(uid, pin) )
1592         {
1593                 sendf(Client->Socket, "201 Pin incorrect\n");
1594                 struct sockaddr_storage addr;
1595                 socklen_t len = sizeof(addr);
1596                 char ipstr[INET6_ADDRSTRLEN];
1597                 getpeername(Client->Socket, (void*)&addr, &len);
1598                 struct sockaddr_in *s = (struct sockaddr_in *)&addr;
1599                 inet_ntop(addr.ss_family, &s->sin_addr, ipstr, sizeof(ipstr));
1600                 Debug_Notice("Bad pin from %s for %s by %i", ipstr, username, Client->UID);
1601                 if( backoff < 5)
1602                         backoff ++;
1603                 return ;
1604         }
1605
1606         last_wrong_pin_time = 0;
1607         backoff = 1;
1608         sendf(Client->Socket, "200 Pin correct\n");
1609         return ;
1610 }
1611 void Server_Cmd_PINSET(tClient *Client, char *Args)
1612 {
1613         char    *pinstr;
1614          int    pin;
1615
1616
1617         if( Server_int_ParseArgs(0, Args, &pinstr, NULL) ) {
1618                 sendf(Client->Socket, "407 PIN_SET takes 1 argument\n");
1619                 return ;
1620         }
1621
1622         if( !isdigit(pinstr[0]) || !isdigit(pinstr[1]) || !isdigit(pinstr[2]) || !isdigit(pinstr[3]) || pinstr[4] != '\0' ) {
1623                 sendf(Client->Socket, "407 PIN should be four digits\n");
1624                 return ;
1625         }
1626         pin = atoi(pinstr);
1627
1628         if( !Client->bIsAuthed ) {
1629                 sendf(Client->Socket, "401 Not Authenticated\n");
1630                 return ;
1631         }
1632
1633         int uid = Client->EffectiveUID;
1634         if(uid == -1)
1635                 uid = Client->UID;
1636         // Can only pinset yourself (well, the effective user)
1637         Bank_SetPin(uid, pin);
1638         sendf(Client->Socket, "200 Pin updated\n");
1639         return ;
1640 }
1641
1642 // --- INTERNAL HELPERS ---
1643 void Debug(tClient *Client, const char *Format, ...)
1644 {
1645         va_list args;
1646         //printf("%010i [%i] ", (int)time(NULL), Client->ID);
1647         printf("[%i] ", Client->ID);
1648         va_start(args, Format);
1649         vprintf(Format, args);
1650         va_end(args);
1651         printf("\n");
1652 }
1653
1654 int sendf(int Socket, const char *Format, ...)
1655 {
1656         va_list args;
1657          int    len;
1658
1659         va_start(args, Format);
1660         len = vsnprintf(NULL, 0, Format, args);
1661         va_end(args);
1662
1663         {
1664                 char    buf[len+1];
1665                 va_start(args, Format);
1666                 vsnprintf(buf, len+1, Format, args);
1667                 va_end(args);
1668
1669                 #if DEBUG_TRACE_CLIENT
1670                 printf("sendf: %s", buf);
1671                 #endif
1672
1673                 return send(Socket, buf, len, 0);
1674         }
1675 }
1676
1677 // Takes a series of char *'s in
1678 /**
1679  * \brief Parse space-separated entries into
1680  */
1681 int Server_int_ParseArgs(int bUseLongLast, char *ArgStr, ...)
1682 {
1683         va_list args;
1684         char    savedChar;
1685         char    **dest;
1686         va_start(args, ArgStr);
1687
1688         // Check for null
1689         if( !ArgStr )
1690         {
1691                 while( (dest = va_arg(args, char **)) )
1692                         *dest = NULL;
1693                 va_end(args);
1694                 return 1;
1695         }
1696
1697         savedChar = *ArgStr;
1698
1699         while( (dest = va_arg(args, char **)) )
1700         {
1701                 // Trim leading spaces
1702                 while( *ArgStr == ' ' || *ArgStr == '\t' )
1703                         ArgStr ++;
1704
1705                 // ... oops, not enough arguments
1706                 if( *ArgStr == '\0' )
1707                 {
1708                         // NULL unset arguments
1709                         do {
1710                                 *dest = NULL;
1711                         }       while( (dest = va_arg(args, char **)) );
1712                 va_end(args);
1713                         return -1;
1714                 }
1715
1716                 if( *ArgStr == '"' )
1717                 {
1718                         ArgStr ++;
1719                         *dest = ArgStr;
1720                         // Read until quote
1721                         while( *ArgStr && *ArgStr != '"' )
1722                                 ArgStr ++;
1723                 }
1724                 else
1725                 {
1726                         // Set destination
1727                         *dest = ArgStr;
1728                         // Read until a space
1729                         while( *ArgStr && *ArgStr != ' ' && *ArgStr != '\t' )
1730                                 ArgStr ++;
1731                 }
1732                 savedChar = *ArgStr;    // savedChar is used to un-mangle the last string
1733                 *ArgStr = '\0';
1734                 ArgStr ++;
1735         }
1736         va_end(args);
1737
1738         // Oops, extra arguments, and greedy not set
1739         if( (savedChar == ' ' || savedChar == '\t') && !bUseLongLast ) {
1740                 return -1;
1741         }
1742
1743         // Un-mangle last
1744         if(bUseLongLast) {
1745                 ArgStr --;
1746                 *ArgStr = savedChar;
1747         }
1748
1749         return 0;       // Success!
1750 }
1751
1752 int Server_int_ParseFlags(tClient *Client, const char *Str, int *Mask, int *Value)
1753 {
1754         struct {
1755                 const char      *Name;
1756                  int    Mask;
1757                  int    Value;
1758         }       cFLAGS[] = {
1759                  {"disabled", USER_FLAG_DISABLED, USER_FLAG_DISABLED}
1760                 ,{"door", USER_FLAG_DOORGROUP, USER_FLAG_DOORGROUP}
1761                 ,{"coke", USER_FLAG_COKE, USER_FLAG_COKE}
1762                 ,{"admin", USER_FLAG_ADMIN, USER_FLAG_ADMIN}
1763                 ,{"internal", USER_FLAG_INTERNAL, USER_FLAG_INTERNAL}
1764         };
1765         const int       ciNumFlags = sizeof(cFLAGS)/sizeof(cFLAGS[0]);
1766
1767         char    *space;
1768
1769         *Mask = 0;
1770         *Value = 0;
1771
1772         do {
1773                  int    bRemove = 0;
1774                  int    i;
1775                  int    len;
1776
1777                 while( *Str == ' ' )    Str ++; // Eat whitespace
1778                 space = strchr(Str, ',');       // Find the end of the flag
1779                 if(space)
1780                         len = space - Str;
1781                 else
1782                         len = strlen(Str);
1783
1784                 // Check for inversion/removal
1785                 if( *Str == '!' || *Str == '-' ) {
1786                         bRemove = 1;
1787                         Str ++;
1788                 }
1789                 else if( *Str == '+' ) {
1790                         Str ++;
1791                 }
1792
1793                 // Check flag values
1794                 for( i = 0; i < ciNumFlags; i ++ )
1795                 {
1796                         if( strncmp(Str, cFLAGS[i].Name, len) == 0 ) {
1797                                 *Mask |= cFLAGS[i].Mask;
1798                                 *Value &= ~cFLAGS[i].Mask;
1799                                 if( !bRemove )
1800                                         *Value |= cFLAGS[i].Value;
1801                                 break;
1802                         }
1803                 }
1804
1805                 // Error check
1806                 if( i == ciNumFlags ) {
1807                         char    val[len+1];
1808                         strncpy(val, Str, len+1);
1809                         sendf(Client->Socket, "407 Unknown flag value '%s'\n", val);
1810                         return -1;
1811                 }
1812
1813                 Str = space + 1;
1814         } while(space);
1815
1816         return 0;
1817 }
1818