Usermode/Applications/irc_src/main.c

   1 /*\r
   2  * Acess2 IRC Client\r
   3  */\r
   4 #include <acess/sys.h>\r
   5 #include <stdlib.h>\r
   6 #include <stdio.h>\r
   7 #include <string.h>\r
   8 #include <net.h>\r
   9 #include <readline.h>\r
  10 \r
  11 #define BUFSIZ  1023\r
  12 \r
  13 // === TYPES ===\r
  14 typedef struct sServer {\r
  15         struct sServer  *Next;\r
  16          int    FD;\r
  17         char    InBuf[BUFSIZ+1];\r
  18          int    ReadPos;\r
  19         char    Name[];\r
  20 } tServer;\r
  21 \r
  22 typedef struct sMessage\r
  23 {\r
  24         struct sMessage *Next;\r
  25         time_t  Timestamp;\r
  26         tServer *Server;\r
  27          int    Type;\r
  28         char    *Source;        // Pointer into `Data`\r
  29         char    Data[];\r
  30 }       tMessage;\r
  31 \r
  32 typedef struct sWindow\r
  33 {\r
  34         struct sWindow  *Next;\r
  35         tMessage        *Messages;\r
  36         tServer *Server;        //!< Canoical server (can be NULL)\r
  37          int    ActivityLevel;\r
  38         char    Name[]; // Channel name / remote user\r
  39 }       tWindow;\r
  40 \r
  41 enum eMessageTypes\r
  42 {\r
  43         MSG_TYPE_NULL,\r
  44         MSG_TYPE_SERVER,        // Server message\r
  45         \r
  46         MSG_TYPE_NOTICE,        // NOTICE command\r
  47         MSG_TYPE_JOIN,  // JOIN command\r
  48         MSG_TYPE_PART,  // PART command\r
  49         MSG_TYPE_QUIT,  // QUIT command\r
  50         \r
  51         MSG_TYPE_STANDARD,      // Standard line\r
  52         MSG_TYPE_ACTION,        // /me\r
  53         \r
  54         MSG_TYPE_UNK\r
  55 };\r
  56 \r
  57 // === PROTOTYPES ===\r
  58  int    ParseArguments(int argc, const char *argv[]);\r
  59  int    ParseUserCommand(char *String);\r
  60 // --- \r
  61 tServer *Server_Connect(const char *Name, const char *AddressString, short PortNumber);\r
  62 tMessage        *Message_AppendF(tServer *Server, int Type, const char *Source, const char *Dest, const char *Message, ...);\r
  63 tMessage        *Message_Append(tServer *Server, int Type, const char *Source, const char *Dest, const char *Message);\r
  64 tWindow *Window_Create(tServer *Server, const char *Name);\r
  65 \r
  66  int    ProcessIncoming(tServer *Server);\r
  67 // --- Helpers\r
  68  int    SetCursorPos(int Row, int Col);\r
  69  int    writef(int FD, const char *Format, ...);\r
  70  int    OpenTCP(const char *AddressString, short PortNumber);\r
  71 char    *GetValue(char *Str, int *Ofs);\r
  72 static inline int       isdigit(int ch);\r
  73 \r
  74 // === GLOBALS ===\r
  75 char    *gsUsername = "user";\r
  76 char    *gsHostname = "acess";\r
  77 char    *gsRealName = "Acess2 IRC Client";\r
  78 char    *gsNickname = "acess";\r
  79 tServer *gpServers;\r
  80 tWindow gWindow_Status = {\r
  81         NULL, NULL, NULL,       // No next, empty list, no server\r
  82         0, ""   // No activity, empty name (rendered as status)\r
  83 };\r
  84 tWindow *gpWindows = &gWindow_Status;\r
  85 tWindow *gpCurrentWindow = &gWindow_Status;\r
  86  int    giTerminal_Width = 80;\r
  87  int    giTerminal_Height = 25;\r
  88 \r
  89 // ==== CODE ====\r
  90 void ExitHandler(void)\r
  91 {\r
  92         printf("\x1B[?1047l");\r
  93         printf("Quit\n");\r
  94 }\r
  95 \r
  96 int main(int argc, const char *argv[], const char *envp[])\r
  97 {\r
  98          int    tmp;\r
  99         tReadline       *readline_info;\r
 100         \r
 101         // Parse Command line\r
 102         if( (tmp = ParseArguments(argc, argv)) )        return tmp;\r
 103         \r
 104         atexit(ExitHandler);\r
 105         \r
 106         giTerminal_Width = ioctl(1, 5, NULL);   // getset_width\r
 107         giTerminal_Height = ioctl(1, 6, NULL);  // getset_height\r
 108         \r
 109         printf("\x1B[?1047h");\r
 110         printf("\x1B[%i;%ir", 0, giTerminal_Height-1);\r
 111         \r
 112         SetCursorPos(giTerminal_Height-1, 0);\r
 113         printf("[(status)] ");\r
 114         \r
 115         // HACK: Static server entry\r
 116         // UCC (University [of Western Australia] Computer Club) IRC Server\r
 117         //gWindow_Status.Server = Server_Connect( "UCC", "130.95.13.18", 6667 );\r
 118         gWindow_Status.Server = Server_Connect( "UCC", "10.0.2.2", 6667 );\r
 119         \r
 120         if( !gWindow_Status.Server )\r
 121                 return -1;\r
 122         \r
 123         SetCursorPos(giTerminal_Height-1, 0);\r
 124         printf("[(status)] ");\r
 125         readline_info = Readline_Init(1);\r
 126         \r
 127         for( ;; )\r
 128         {\r
 129                 fd_set  readfds, errorfds;\r
 130                  int    rv, maxFD = 0;\r
 131                 tServer *srv;\r
 132                 \r
 133                 FD_ZERO(&readfds);\r
 134                 FD_ZERO(&errorfds);\r
 135                 FD_SET(0, &readfds);    // stdin\r
 136                 \r
 137                 // Fill server FDs in fd_set\r
 138                 for( srv = gpServers; srv; srv = srv->Next )\r
 139                 {\r
 140                         FD_SET(srv->FD, &readfds);\r
 141                         FD_SET(srv->FD, &errorfds);\r
 142                         if( srv->FD > maxFD )\r
 143                                 maxFD = srv->FD;\r
 144                 }\r
 145                 \r
 146                 rv = select(maxFD+1, &readfds, 0, &errorfds, NULL);\r
 147                 if( rv == -1 )  break;\r
 148                 \r
 149                 if(FD_ISSET(0, &readfds))\r
 150                 {\r
 151                         // User input\r
 152                         char    *cmd = Readline_NonBlock(readline_info);\r
 153                         if( cmd )\r
 154                         {\r
 155                                 if( cmd[0] )\r
 156                                 {\r
 157                                         ParseUserCommand(cmd);\r
 158                                 }\r
 159                                 free(cmd);\r
 160                                 // Prompt\r
 161                                 SetCursorPos(giTerminal_Height-1, 0);\r
 162                                 printf("\x1B[K");       // Clear line\r
 163                                 if( gpCurrentWindow->Name[0] )\r
 164                                         printf("[%s:%s] ", gpCurrentWindow->Server->Name, gpCurrentWindow->Name);\r
 165                                 else\r
 166                                         printf("[(status)] ");\r
 167                         }\r
 168                 }\r
 169                 \r
 170                 // Server response\r
 171                 for( srv = gpServers; srv; srv = srv->Next )\r
 172                 {\r
 173                         if(FD_ISSET(srv->FD, &readfds))\r
 174                         {\r
 175                                 if( ProcessIncoming(srv) != 0 ) {\r
 176                                         // Oops, error\r
 177                                         break;\r
 178                                 }\r
 179                         }\r
 180                         \r
 181                         if(FD_ISSET(srv->FD, &errorfds))\r
 182                         {\r
 183                                 break;\r
 184                         }\r
 185                 }\r
 186                 \r
 187                 // Oops, an error\r
 188                 if( srv )       break;\r
 189         }\r
 190         \r
 191         {\r
 192                 tServer *srv;\r
 193                 for( srv = gpServers; srv; srv = srv->Next )\r
 194                         close(srv->FD);\r
 195         }\r
 196         return 0;\r
 197 }\r
 198 \r
 199 /**\r
 200  * \todo Actually implement correctly :)\r
 201  */\r
 202 int ParseArguments(int argc, const char *argv[])\r
 203 {\r
 204         return 0;\r
 205 }\r
 206 \r
 207 int ParseUserCommand(char *String)\r
 208 {\r
 209         if( String[0] == '/' )\r
 210         {\r
 211                 char    *command;\r
 212                  int    pos = 0;\r
 213                 \r
 214                 command = GetValue(String, &pos);\r
 215                 \r
 216                 if( strcmp(command, "/join") == 0 )\r
 217                 {\r
 218                         char    *channel_name = GetValue(String, &pos);\r
 219                         \r
 220                         if( gpCurrentWindow->Server )\r
 221                         {\r
 222                                 writef(gpCurrentWindow->Server->FD, "JOIN :%s\n",  channel_name);\r
 223                         }\r
 224                 }\r
 225                 else if( strcmp(command, "/quit") == 0 )\r
 226                 {\r
 227                         char    *quit_message = String + pos;\r
 228                         tServer *srv;\r
 229                         \r
 230                         if( quit_message == NULL || quit_message[0] == '\0' )\r
 231                                 quit_message = "/quit - Acess2 IRC Client";\r
 232                         \r
 233                         for( srv = gpServers; srv; srv = srv->Next )\r
 234                         {\r
 235                                 writef(srv->FD, "QUIT :%s\n", quit_message);\r
 236                         }\r
 237                         \r
 238                         exit(0);\r
 239                 }\r
 240                 else if( strcmp(command, "/window") == 0 || strcmp(command, "/win") == 0 || strcmp(command, "/w") == 0 )\r
 241                 {\r
 242                         char    *window_id = GetValue(String, &pos);\r
 243                          int    window_num = atoi(window_id);\r
 244                         \r
 245                         if( window_num > 0 )\r
 246                         {\r
 247                                 tWindow *win;\r
 248                                 window_num --;  // Move to base 0\r
 249                                 // Get `window_num`th window\r
 250                                 for( win = gpWindows; win && window_num--; win = win->Next );\r
 251                                 if( win ) {\r
 252                                         gpCurrentWindow = win;\r
 253                                 }\r
 254                                 // Otherwise, silently ignore\r
 255                         }\r
 256                         else\r
 257                         {\r
 258                                 tWindow *win;\r
 259                                 window_num = 1;\r
 260                                 for( win = gpWindows; win; win = win->Next, window_num ++ )\r
 261                                 {\r
 262                                         if( win->Name[0] ) {\r
 263                                                 Message_AppendF(NULL, MSG_TYPE_SERVER, "client", "",\r
 264                                                         "%i: %s/%s", window_num, win->Server->Name, win->Name);\r
 265                                         }\r
 266                                         else {\r
 267                                                 Message_AppendF(NULL, MSG_TYPE_SERVER, "client", "",\r
 268                                                         "%i: (status)", window_num);\r
 269                                         }\r
 270                                 }\r
 271                         }\r
 272                 }\r
 273                 else\r
 274                 {\r
 275                         Message_AppendF(NULL, MSG_TYPE_SERVER, "client", "", "Unknown command %s", command);\r
 276                 }\r
 277         }\r
 278         else\r
 279         {\r
 280                 // Message\r
 281                 // - Only send if server is valid and window name is non-empty\r
 282                 if( gpCurrentWindow->Server && gpCurrentWindow->Name[0] )\r
 283                 {\r
 284                         Message_Append(gpCurrentWindow->Server, MSG_TYPE_STANDARD,\r
 285                                 gsNickname, gpCurrentWindow->Name, String);\r
 286                         writef(gpCurrentWindow->Server->FD,\r
 287                                 "PRIVMSG %s :%s\n", gpCurrentWindow->Name,\r
 288                                 String\r
 289                                 );\r
 290                 }\r
 291         }\r
 292         \r
 293         return 0;\r
 294 }\r
 295 \r
 296 /**\r
 297  * \brief Connect to a server\r
 298  */\r
 299 tServer *Server_Connect(const char *Name, const char *AddressString, short PortNumber)\r
 300 {\r
 301         tServer *ret;\r
 302         \r
 303         ret = calloc(1, sizeof(tServer) + strlen(Name) + 1);\r
 304         \r
 305         strcpy(ret->Name, Name);\r
 306         \r
 307         // Connect to the remove server\r
 308         ret->FD = OpenTCP( AddressString, PortNumber );\r
 309         if( ret->FD == -1 ) {\r
 310                 fprintf(stderr, "%s: Unable to create socket\n", Name);\r
 311                 return NULL;\r
 312         }\r
 313         \r
 314         // Append to open list\r
 315         ret->Next = gpServers;\r
 316         gpServers = ret;\r
 317         \r
 318         // Read some initial data\r
 319         Message_Append(NULL, MSG_TYPE_SERVER, Name, "", "Connection opened");\r
 320         ProcessIncoming(ret);\r
 321         \r
 322         // Identify\r
 323         writef(ret->FD, "USER %s %s %s : %s\n", gsUsername, gsHostname, AddressString, gsRealName);\r
 324         writef(ret->FD, "NICK %s\n", gsNickname);\r
 325         Message_Append(NULL, MSG_TYPE_SERVER, Name, "", "Identified");\r
 326         //printf("%s: Identified\n", Name);\r
 327         \r
 328         return ret;\r
 329 }\r
 330 \r
 331 tMessage *Message_AppendF(tServer *Server, int Type, const char *Source, const char *Dest, const char *Message, ...)\r
 332 {\r
 333         va_list args;\r
 334          int    len;\r
 335         va_start(args, Message);\r
 336         len = vsnprintf(NULL, 1000, Message, args);\r
 337         {\r
 338                 char    buf[len+1];\r
 339                 vsnprintf(buf, len+1, Message, args);\r
 340                 return Message_Append(Server, Type, Source, Dest, buf);\r
 341         }\r
 342 }\r
 343 \r
 344 tMessage *Message_Append(tServer *Server, int Type, const char *Source, const char *Dest, const char *Message)\r
 345 {\r
 346         tMessage        *ret;\r
 347         tWindow *win = NULL;\r
 348          int    msgLen = strlen(Message);\r
 349         \r
 350         // NULL servers are internal messages\r
 351         if( Server == NULL || Source[0] == '\0' )\r
 352         {\r
 353                 win = &gWindow_Status;\r
 354         }\r
 355         // Determine if it's a channel or PM message\r
 356         else if( Dest[0] == '#' || Dest[0] == '&' )     // TODO: Better determining here\r
 357         {\r
 358                 tWindow *prev = NULL;\r
 359                 for(win = gpWindows; win; prev = win, win = win->Next)\r
 360                 {\r
 361                         if( win->Server == Server && strcmp(win->Name, Dest) == 0 )\r
 362                         {\r
 363                                 break;\r
 364                         }\r
 365                 }\r
 366                 if( !win ) {\r
 367                         win = Window_Create(Server, Dest);\r
 368                 }\r
 369         }\r
 370         #if 0\r
 371         else if( strcmp(Dest, Server->Nick) != 0 )\r
 372         {\r
 373                 // Umm... message for someone who isn't us?\r
 374                 win = &gWindow_Status;  // Stick it in the status window, just in case\r
 375         }\r
 376         #endif\r
 377         // Server message?\r
 378         else if( strchr(Source, '.') )  // TODO: And again, less hack please\r
 379         {\r
 380                 #if 1\r
 381                 for(win = gpWindows; win; win = win->Next)\r
 382                 {\r
 383                         if( win->Server == Server && strcmp(win->Name, Source) == 0 )\r
 384                         {\r
 385                                 break;\r
 386                         }\r
 387                 }\r
 388                 #endif\r
 389                 if( !win ) {\r
 390                         win = &gWindow_Status;\r
 391                 }\r
 392                 \r
 393         }\r
 394         // Private message\r
 395         else\r
 396         {\r
 397                 for(win = gpWindows; win; win = win->Next)\r
 398                 {\r
 399                         if( win->Server == Server && strcmp(win->Name, Source) == 0 )\r
 400                         {\r
 401                                 break;\r
 402                         }\r
 403                 }\r
 404                 if( !win ) {\r
 405                         win = Window_Create(Server, Dest);\r
 406                 }\r
 407         }\r
 408         \r
 409         ret = malloc( sizeof(tMessage) + msgLen + 1 + strlen(Source) + 1 );\r
 410         ret->Source = ret->Data + msgLen + 1;\r
 411         strcpy(ret->Source, Source);\r
 412         strcpy(ret->Data, Message);\r
 413         ret->Type = Type;\r
 414         ret->Server = Server;\r
 415         \r
 416         // TODO: Append to window message list\r
 417         ret->Next = win->Messages;\r
 418         win->Messages = ret;\r
 419         \r
 420         //TODO: Set location\r
 421         \r
 422         {\r
 423                 int pos = SetCursorPos(giTerminal_Height-2, 0);\r
 424                 #if 1\r
 425                 if( win == gpCurrentWindow ) {\r
 426                         printf("\x1B[T");       // Scroll down 1 (free space below)\r
 427                         printf("[%s] %s\n", Source, Message);\r
 428                 }\r
 429                 #else\r
 430                 if(win->Name[0])\r
 431                         printf("%s/%s [%s] %s\n", win->Server->Name, win->Name, Source, Message);\r
 432                 else\r
 433                         printf("(status) [%s] %s\n", Source, Message);\r
 434                 #endif\r
 435                 SetCursorPos(-1, pos);\r
 436         }\r
 437         \r
 438         return ret;\r
 439 }\r
 440 \r
 441 tWindow *Window_Create(tServer *Server, const char *Name)\r
 442 {\r
 443         tWindow *ret, *prev = NULL;\r
 444          int    num = 1;\r
 445         \r
 446         // Get the end of the list\r
 447         // TODO: Cache this instead\r
 448         for( ret = gpCurrentWindow; ret; prev = ret, ret = ret->Next )\r
 449                 num ++;\r
 450         \r
 451         ret = malloc(sizeof(tWindow) + strlen(Name) + 1);\r
 452         ret->Messages = NULL;\r
 453         ret->Server = Server;\r
 454         ret->ActivityLevel = 1;\r
 455         strcpy(ret->Name, Name);\r
 456         \r
 457         if( prev ) {\r
 458                 ret->Next = prev->Next;\r
 459                 prev->Next = ret;\r
 460         }\r
 461         else {  // Shouldn't happen really\r
 462                 ret->Next = gpWindows;\r
 463                 gpWindows = ret;\r
 464         }\r
 465         \r
 466 //      printf("Win %i %s:%s created\n", num, Server->Name, Name);\r
 467         \r
 468         return ret;\r
 469 }\r
 470 \r
 471 void Cmd_PRIVMSG(tServer *Server, const char *Dest, const char *Src, const char *Message)\r
 472 {\r
 473         Message_Append(Server, MSG_TYPE_STANDARD, Dest, Src, Message);\r
 474         //printf("<%s:%s:%s> %s\n", Server->Name, Dest, Src, Message);\r
 475 }\r
 476 \r
 477 /**\r
 478  */\r
 479 void ParseServerLine(tServer *Server, char *Line)\r
 480 {\r
 481          int    pos = 0;\r
 482         char    *ident, *cmd;\r
 483         \r
 484         // Message?\r
 485         if( *Line == ':' )\r
 486         {\r
 487                 ident = GetValue(Line, &pos);   // Ident (user or server)\r
 488                 cmd = GetValue(Line, &pos);\r
 489                 \r
 490                 // Numeric command\r
 491                 if( isdigit(cmd[0]) && isdigit(cmd[1]) && isdigit(cmd[2]) )\r
 492                 {\r
 493                         char    *user, *message;\r
 494                          int    num;\r
 495                         num  = (cmd[0] - '0') * 100;\r
 496                         num += (cmd[1] - '0') * 10;\r
 497                         num += (cmd[2] - '0') * 1;\r
 498                         \r
 499                         user = GetValue(Line, &pos);\r
 500                         \r
 501                         if( Line[pos] == ':' ) {\r
 502                                 message = Line + pos + 1;\r
 503                         }\r
 504                         else {\r
 505                                 message = GetValue(Line, &pos);\r
 506                         }\r
 507                         \r
 508                         switch(num)\r
 509                         {\r
 510                         default:\r
 511                                 //printf("[%s] %i %s\n", Server->Name, num, message);\r
 512                                 Message_Append(Server, MSG_TYPE_SERVER, ident, user, message);\r
 513                                 break;\r
 514                         }\r
 515                 }\r
 516                 else if( strcmp(cmd, "NOTICE") == 0 )\r
 517                 {\r
 518                         char    *class, *message;\r
 519                         \r
 520                         class = GetValue(Line, &pos);\r
 521                         \r
 522                         if( Line[pos] == ':' ) {\r
 523                                 message = Line + pos + 1;\r
 524                         }\r
 525                         else {\r
 526                                 message = GetValue(Line, &pos);\r
 527                         }\r
 528                         \r
 529                         //printf("[%s] NOTICE %s: %s\n", Server->Name, ident, message);\r
 530                         Message_Append(Server, MSG_TYPE_NOTICE, ident, "", message);\r
 531                 }\r
 532                 else if( strcmp(cmd, "PRIVMSG") == 0 )\r
 533                 {\r
 534                         char    *dest, *message;\r
 535                         dest = GetValue(Line, &pos);\r
 536                         \r
 537                         if( Line[pos] == ':' ) {\r
 538                                 message = Line + pos + 1;\r
 539                         }\r
 540                         else {\r
 541                                 message = GetValue(Line, &pos);\r
 542                         }\r
 543                         Cmd_PRIVMSG(Server, dest, ident, message);\r
 544                         Message_Append(Server, MSG_TYPE_STANDARD, ident, dest, message);\r
 545                 }\r
 546                 else if( strcmp(cmd, "JOIN" ) == 0 )\r
 547                 {\r
 548                         char    *channel;\r
 549                         channel = GetValue(Line, &pos) + 1;\r
 550                         Window_Create(Server, channel);\r
 551                 }\r
 552                 else\r
 553                 {\r
 554                         Message_AppendF(Server, MSG_TYPE_SERVER, "", "", "Unknown message %s (%s)\n", cmd, Line+pos);\r
 555                 }\r
 556         }\r
 557         else {\r
 558                 \r
 559                 // Command to client\r
 560                 printf("Client Command: %s", Line);\r
 561         }\r
 562 }\r
 563 \r
 564 /**\r
 565  * \brief Process incoming lines from the server\r
 566  */\r
 567 int ProcessIncoming(tServer *Server)\r
 568 {       \r
 569         char    *ptr, *newline;\r
 570          int    len;\r
 571         \r
 572         // While there is data in the buffer, read it into user memory and \r
 573         // process it line by line\r
 574         // ioctl#8 on a TCP client gets the number of bytes in the recieve buffer\r
 575         // - Used to avoid blocking\r
 576         #if NON_BLOCK_READ\r
 577         while( (len = ioctl(Server->FD, 8, NULL)) > 0 )\r
 578         {\r
 579         #endif\r
 580                 // Read data\r
 581                 len = read(Server->FD, BUFSIZ - Server->ReadPos, &Server->InBuf[Server->ReadPos]);\r
 582                 if( len == -1 ) {\r
 583                         return -1;\r
 584                 }\r
 585                 Server->InBuf[Server->ReadPos + len] = '\0';\r
 586                 \r
 587                 // Break into lines\r
 588                 ptr = Server->InBuf;\r
 589                 while( (newline = strchr(ptr, '\n')) )\r
 590                 {\r
 591                         *newline = '\0';\r
 592                         if( newline[-1] == '\r' )       newline[-1] = '\0';\r
 593                         ParseServerLine(Server, ptr);\r
 594                         ptr = newline + 1;\r
 595                 }\r
 596                 \r
 597                 // Handle incomplete lines\r
 598                 if( ptr - Server->InBuf < len + Server->ReadPos ) {\r
 599                         // Update the read position\r
 600                         // InBuf ReadPos    ptr          ReadPos+len\r
 601                         // | old | new used | new unused |\r
 602                         Server->ReadPos = len + Server->ReadPos - (ptr - Server->InBuf);\r
 603                         // Copy stuff back (moving "new unused" to the start of the buffer)\r
 604                         memcpy(Server->InBuf, ptr, Server->ReadPos);\r
 605                 }\r
 606                 else {\r
 607                         Server->ReadPos = 0;\r
 608                 }\r
 609         #if NON_BLOCK_READ\r
 610         }\r
 611         #endif\r
 612         \r
 613         return 0;\r
 614 }\r
 615 \r
 616 /**\r
 617  * \brief Write a formatted string to a file descriptor\r
 618  * \r
 619  */\r
 620 int writef(int FD, const char *Format, ...)\r
 621 {\r
 622         va_list args;\r
 623          int    len;\r
 624         \r
 625         va_start(args, Format);\r
 626         len = vsnprintf(NULL, 1000, Format, args);\r
 627         va_end(args);\r
 628         \r
 629         {\r
 630                 char    buf[len+1];\r
 631                 va_start(args, Format);\r
 632                 vsnprintf(buf, len+1, Format, args);\r
 633                 va_end(args);\r
 634                 \r
 635                 return write(FD, len, buf);\r
 636         }\r
 637 }\r
 638 \r
 639 /**\r
 640  * \brief Initialise a TCP connection to \a AddressString on port \a PortNumber\r
 641  */\r
 642 int OpenTCP(const char *AddressString, short PortNumber)\r
 643 {\r
 644          int    fd, addrType;\r
 645         char    *iface;\r
 646         char    addrBuffer[8];\r
 647         \r
 648         // Parse IP Address\r
 649         addrType = Net_ParseAddress(AddressString, addrBuffer);\r
 650         if( addrType == 0 ) {\r
 651                 fprintf(stderr, "Unable to parse '%s' as an IP address\n", AddressString);\r
 652                 return -1;\r
 653         }\r
 654         \r
 655         // Finds the interface for the destination address\r
 656         iface = Net_GetInterface(addrType, addrBuffer);\r
 657         if( iface == NULL ) {\r
 658                 fprintf(stderr, "Unable to find a route to '%s'\n", AddressString);\r
 659                 return -1;\r
 660         }\r
 661         \r
 662         printf("iface = '%s'\n", iface);\r
 663         \r
 664         // Open client socket\r
 665         // TODO: Move this out to libnet?\r
 666         {\r
 667                  int    len = snprintf(NULL, 100, "/Devices/ip/%s/tcpc", iface);\r
 668                 char    path[len+1];\r
 669                 snprintf(path, 100, "/Devices/ip/%s/tcpc", iface);\r
 670                 fd = open(path, OPENFLAG_READ|OPENFLAG_WRITE);\r
 671         }\r
 672         \r
 673         free(iface);\r
 674         \r
 675         if( fd == -1 ) {\r
 676                 fprintf(stderr, "Unable to open TCP Client for reading\n");\r
 677                 return -1;\r
 678         }\r
 679         \r
 680         // Set remote port and address\r
 681         printf("Setting port and remote address\n");\r
 682         ioctl(fd, 5, &PortNumber);\r
 683         ioctl(fd, 6, addrBuffer);\r
 684         \r
 685         // Connect\r
 686         printf("Initiating connection\n");\r
 687         if( ioctl(fd, 7, NULL) == 0 ) {\r
 688                 // Shouldn't happen :(\r
 689                 fprintf(stderr, "Unable to start connection\n");\r
 690                 return -1;\r
 691         }\r
 692         \r
 693         // Return descriptor\r
 694         return fd;\r
 695 }\r
 696 \r
 697 /**\r
 698  * \brief Read a space-separated value from a string\r
 699  */\r
 700 char *GetValue(char *Src, int *Ofs)\r
 701 {\r
 702          int    pos = *Ofs;\r
 703         char    *ret = Src + pos;\r
 704         char    *end;\r
 705         \r
 706         if( !Src )      return NULL;\r
 707         \r
 708         while( *ret == ' ' )    ret ++;\r
 709         \r
 710         end = strchr(ret, ' ');\r
 711         if( end ) {\r
 712                 *end = '\0';\r
 713         }\r
 714         else {\r
 715                 end = ret + strlen(ret) - 1;\r
 716         }\r
 717         \r
 718         end ++ ;\r
 719         while( *ret == ' ' )    end ++;\r
 720         *Ofs = end - Src;\r
 721         \r
 722         return ret;\r
 723 }\r
 724 \r
 725 int SetCursorPos(int Row, int Col)\r
 726 {\r
 727         if( Row == -1 ) {\r
 728                 Row = Col / giTerminal_Width;\r
 729                 Col = Col % giTerminal_Width;\r
 730         }\r
 731         printf("\x1B[%i;%iH", Col, Row);\r
 732         return ioctl(1, 9, NULL);       // Ugh, constants\r
 733 }\r
 734 \r
 735 static inline int isdigit(int ch)\r
 736 {\r
 737         return '0' <= ch && ch < '9';\r
 738 }\r