src/inspircd_io.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  Inspire is copyright (C) 2002-2003 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 #ifdef __linux__
  18 #include <sys/resource.h>
  19 #endif
  20
  21 #include <sys/types.h>
  22 #include <string>
  23 #include <unistd.h>
  24 #include <sstream>
  25 #include <iostream>
  26 #include <fstream>
  27 #include "inspircd.h"
  28 #include "inspircd_io.h"
  29 #include "inspircd_util.h"
  30
  31 using namespace std;
  32
  33 extern FILE *log_file;
  34
  35 void WriteOpers(char* text, ...);
  36
  37 void Exit (int status)
  38 {
  39   if (log_file)
  40         fclose(log_file);
  41   send_error("Server shutdown.");
  42   exit (status);
  43 }
  44
  45 void Killed(int status)
  46 {
  47   if (log_file)
  48         fclose(log_file);
  49   send_error("Server terminated.");
  50   exit(status);
  51 }
  52
  53 void Rehash(int status)
  54 {
  55   ReadConfig();
  56   WriteOpers("Rehashing config file %s due to SIGHUP",CONFIG_FILE);
  57 }
  58
  59
  60
  61 void Start (void)
  62 {
  63   printf("\033[1;37mInspire Internet Relay Chat Server, compiled " __DATE__ " at " __TIME__ "\n");
  64   printf("(C) ChatSpike Development team.\033[0;37m\n\n");
  65   printf("\033[1;37mDevelopers:\033[0;37m     Brain, FrostyCoolSlug, RD\n");
  66   printf("\033[1;37mDocumentation:\033[0;37m  FrostyCoolSlug, w00t\n");
  67   printf("\033[1;37mTesters:\033[0;37m        typobox43, piggles, Lord_Zathras, CC\n");
  68   printf("\033[1;37mName concept:\033[0;37m   Lord_Zathras\n\n");
  69 }
  70
  71
  72 void DeadPipe(int status)
  73 {
  74   signal (SIGPIPE, DeadPipe);
  75 }
  76
  77 int DaemonSeed (void)
  78 {
  79   int childpid;
  80   signal (SIGALRM, SIG_IGN);
  81   signal (SIGHUP, Rehash);
  82   signal (SIGPIPE, DeadPipe);
  83   signal (SIGTERM, Exit);
  84   signal (SIGABRT, Exit);
  85   signal (SIGSEGV, Error);
  86   signal (SIGURG, Exit);
  87   signal (SIGKILL, Exit);
  88   if ((childpid = fork ()) < 0)
  89     return (ERROR);
  90   else if (childpid > 0)
  91     exit (0);
  92   setsid ();
  93   umask (077);
  94   /* close stdout, stdin, stderr */
  95   close(0);
  96   close(1);
  97   close(2);
  98
  99   #ifdef __linux__
 100   setpriority(PRIO_PROCESS,(int)getpid(),15); /* ircd sets to low process priority so it doesnt hog the box */
 101   #endif
 102
 103   return (TRUE);
 104 }
 105
 106
 107 /* Make Sure Modules Are Avaliable!
 108  * (BugFix By Craig.. See? I do work! :p)
 109  * Modified by brain, requires const char*
 110  * to work with other API functions
 111  */
 112
 113 bool FileExists (const char* file)
 114 {
 115   FILE *input;
 116
 117   if ((input = fopen (file, "r")) == NULL) { return(false); }
 118   else { fclose (input); return(true); }
 119 }
 120
 121
 122 bool LoadConf(const char* filename, std::stringstream *target)
 123 {
 124         FILE* conf = fopen(filename,"r");
 125         if (!FileExists(filename))
 126         {
 127                 return false;
 128         }
 129         char buffer[MAXBUF];
 130         if (conf)
 131         {
 132                 target->clear();
 133                 while (!feof(conf))
 134                 {
 135                         if (fgets(buffer, MAXBUF, conf))
 136                         {
 137                                 if ((!feof(conf)) && (buffer) && (strlen(buffer)))
 138                                 {
 139                                         if (buffer[0] != '#')
 140                                         {
 141                                                 *target << std::string(buffer);
 142                                         }
 143                                 }
 144                         }
 145                 }
 146                 fclose(conf);
 147         }
 148         target->seekg(0);
 149         return true;
 150 }
 151
 152 /* Counts the number of tags of a certain type within the config file, e.g. to enumerate opers */
 153
 154 int EnumConf(std::stringstream *config, const char* tag)
 155 {
 156         int ptr = 0;
 157         char buffer[MAXBUF], c_tag[MAXBUF], c, lastc;
 158         int in_token, in_quotes, tptr, j, idx = 0;
 159         char* key;
 160
 161         const char* buf = config->str().c_str();
 162         long bptr = 0;
 163         long len = strlen(buf);
 164
 165         ptr = 0;
 166         in_token = 0;
 167         in_quotes = 0;
 168         lastc = '\0';
 169         while (bptr<len)
 170         {
 171                 lastc = c;
 172                 c = buf[bptr++];
 173                 if ((c == '#') && (lastc == '\n'))
 174                 {
 175                         while ((c != '\n') && (bptr<len))
 176                         {
 177                                 lastc = c;
 178                                 c = buf[bptr++];
 179                         }
 180                 }
 181                 if ((c == '<') && (!in_quotes))
 182                 {
 183                         tptr = 0;
 184                         in_token = 1;
 185                         do {
 186                                 c = buf[bptr++];
 187                                 if (c != ' ')
 188                                 {
 189                                         c_tag[tptr++] = c;
 190                                         c_tag[tptr] = '\0';
 191                                 }
 192                         } while (c != ' ');
 193                 }
 194                 if (c == '"')
 195                 {
 196                         in_quotes = (!in_quotes);
 197                 }
 198                 if ((c == '>') && (!in_quotes))
 199                 {
 200                         in_token = 0;
 201                         if (!strcmp(c_tag,tag))
 202                         {
 203                                 /* correct tag, but wrong index */
 204                                 idx++;
 205                         }
 206                         c_tag[0] = '\0';
 207                         buffer[0] = '\0';
 208                         ptr = 0;
 209                         tptr = 0;
 210                 }
 211                 if (c != '>')
 212                 {
 213                         if ((in_token) && (c != '\n') && (c != '\r'))
 214                         {
 215                                 buffer[ptr++] = c;
 216                                 buffer[ptr] = '\0';
 217                         }
 218                 }
 219         }
 220         return idx;
 221 }
 222
 223 /* Counts the number of values within a certain tag */
 224
 225 int EnumValues(std::stringstream *config, const char* tag, int index)
 226 {
 227         int ptr = 0;
 228         char buffer[MAXBUF], c_tag[MAXBUF], c, lastc;
 229         int in_token, in_quotes, tptr, j, idx = 0;
 230         char* key;
 231
 232         bool correct_tag = false;
 233         int num_items = 0;
 234
 235         const char* buf = config->str().c_str();
 236         long bptr = 0;
 237         long len = strlen(buf);
 238
 239         ptr = 0;
 240         in_token = 0;
 241         in_quotes = 0;
 242         lastc = '\0';
 243         while (bptr<len)
 244         {
 245                 lastc = c;
 246                 c = buf[bptr++];
 247                 if ((c == '#') && (lastc == '\n'))
 248                 {
 249                         while ((c != '\n') && (bptr<len))
 250                         {
 251                                 lastc = c;
 252                                 c = buf[bptr++];
 253                         }
 254                 }
 255                 if ((c == '<') && (!in_quotes))
 256                 {
 257                         tptr = 0;
 258                         in_token = 1;
 259                         do {
 260                                 c = buf[bptr++];
 261                                 if (c != ' ')
 262                                 {
 263                                         c_tag[tptr++] = c;
 264                                         c_tag[tptr] = '\0';
 265
 266                                         if ((!strcmp(c_tag,tag)) && (idx == index))
 267                                         {
 268                                                 correct_tag = true;
 269                                         }
 270                                 }
 271                         } while (c != ' ');
 272                 }
 273                 if (c == '"')
 274                 {
 275                         in_quotes = (!in_quotes);
 276                 }
 277
 278                 if ( (correct_tag) && (!in_quotes) && ( (c == ' ') || (c == '\n') || (c == '\r') ) )
 279                 {
 280                         num_items++;
 281                 }
 282                 if ((c == '>') && (!in_quotes))
 283                 {
 284                         in_token = 0;
 285                         if (correct_tag)
 286                                 correct_tag = false;
 287                         if (!strcmp(c_tag,tag))
 288                         {
 289                                 /* correct tag, but wrong index */
 290                                 idx++;
 291                         }
 292                         c_tag[0] = '\0';
 293                         buffer[0] = '\0';
 294                         ptr = 0;
 295                         tptr = 0;
 296                 }
 297                 if (c != '>')
 298                 {
 299                         if ((in_token) && (c != '\n') && (c != '\r'))
 300                         {
 301                                 buffer[ptr++] = c;
 302                                 buffer[ptr] = '\0';
 303                         }
 304                 }
 305         }
 306         return num_items+1;
 307 }
 308
 309
 310
 311 int ConfValueEnum(char* tag, std::stringstream* config)
 312 {
 313         return EnumConf(config,tag);
 314 }
 315
 316
 317
 318 /* Retrieves a value from the config file. If there is more than one value of the specified
 319  * key and section (e.g. for opers etc) then the index value specifies which to retreive, e.g.
 320  *
 321  * ConfValue("oper","name",2,result);
 322  */
 323
 324 int ReadConf(std::stringstream *config, const char* tag, const char* var, int index, char *result)
 325 {
 326         int ptr = 0;
 327         char buffer[65535], c_tag[MAXBUF], c, lastc;
 328         int in_token, in_quotes, tptr, j, idx = 0;
 329         char* key;
 330
 331         const char* buf = config->str().c_str();
 332         long bptr = 0;
 333         long len = strlen(buf);
 334         log(DEBUG,"Data length: %d",len);
 335
 336         ptr = 0;
 337         in_token = 0;
 338         in_quotes = 0;
 339         lastc = '\0';
 340         c_tag[0] = '\0';
 341         buffer[0] = '\0';
 342         while (bptr<len)
 343         {
 344                 lastc = c;
 345                 c = buf[bptr++];
 346                 // FIX: Treat tabs as spaces
 347                 if (c == 9)
 348                         c = 32;
 349                 if ((c == '<') && (!in_quotes))
 350                 {
 351                         tptr = 0;
 352                         in_token = 1;
 353                         do {
 354                                 c = buf[bptr++];
 355                                 if (c != ' ')
 356                                 {
 357                                         c_tag[tptr++] = c;
 358                                         c_tag[tptr] = '\0';
 359                                 }
 360                         // FIX: Tab can follow a tagname as well as space.
 361                         } while ((c != ' ') && (c != 9));
 362                 }
 363                 if (c == '"')
 364                 {
 365                         in_quotes = (!in_quotes);
 366                 }
 367                 if ((c == '>') && (!in_quotes))
 368                 {
 369                         in_token = 0;
 370                         if (idx == index)
 371                         {
 372                                 if (!strcmp(c_tag,tag))
 373                                 {
 374                                         if ((buffer) && (c_tag) && (var))
 375                                         {
 376                                                 key = strstr(buffer,var);
 377                                                 if (!key)
 378                                                 {
 379                                                         /* value not found in tag */
 380                                                         strcpy(result,"");
 381                                                         log(DEBUG,"ReadConf: value '%s' was not found in tag",var);
 382                                                         return 0;
 383                                                 }
 384                                                 else
 385                                                 {
 386                                                         key+=strlen(var);
 387                                                         while (key[0] !='"')
 388                                                         {
 389                                                                 if (!strlen(key))
 390                                                                 {
 391                                                                         /* missing quote */
 392                                                                         strcpy(result,"");
 393                                                                         log(DEBUG,"ReadConf: possible missing quote!");
 394                                                                         return 0;
 395                                                                 }
 396                                                                 key++;
 397                                                         }
 398                                                         key++;
 399                                                         for (j = 0; j < strlen(key); j++)
 400                                                         {
 401                                                                 if (key[j] == '"')
 402                                                                 {
 403                                                                         key[j] = '\0';
 404                                                                 }
 405                                                         }
 406                                                         strcpy(result,key);
 407                                                         log(DEBUG,"ReadConf: Got value '%s'",result);
 408                                                         return 1;
 409                                                 }
 410                                         }
 411                                 }
 412                         }
 413                         if (!strcmp(c_tag,tag))
 414                         {
 415                                 log(DEBUG,"Tag name correct but index value incorrect");
 416                                 /* correct tag, but wrong index */
 417                                 idx++;
 418                         }
 419                         c_tag[0] = '\0';
 420                         buffer[0] = '\0';
 421                         ptr = 0;
 422                         tptr = 0;
 423                 }
 424                 if (c != '>')
 425                 {
 426                         if ((in_token) && (c != '\n') && (c != '\r'))
 427                         {
 428                                 buffer[ptr++] = c;
 429                                 buffer[ptr] = '\0';
 430                         }
 431                 }
 432         }
 433         log(DEBUG,"ReadConf: neither value '%s' or tag '%s' were found at all!",var,tag);
 434         strcpy(result,""); // value or its tag not found at all
 435         return 0;
 436 }
 437
 438
 439
 440 int ConfValue(char* tag, char* var, int index, char *result,std::stringstream *config)
 441 {
 442         ReadConf(config, tag, var, index, result);
 443         return 0;
 444 }
 445
 446
 447
 448 /* This will bind a socket to a port. It works for UDP/TCP */
 449 int BindSocket (int sockfd, struct sockaddr_in client, struct sockaddr_in server, int port, char* addr)
 450 {
 451   bzero((char *)&server,sizeof(server));
 452   struct in_addr addy;
 453   inet_aton(addr,&addy);
 454
 455   server.sin_family = AF_INET;
 456   if (!strcmp(addr,""))
 457   {
 458           server.sin_addr.s_addr = htonl(INADDR_ANY);
 459   }
 460   else
 461   {
 462           server.sin_addr = addy;
 463   }
 464
 465   server.sin_port = htons(port);
 466
 467   if (bind(sockfd,(struct sockaddr*)&server,sizeof(server))<0)
 468   {
 469     return(ERROR);
 470   }
 471   else
 472   {
 473     listen(sockfd,5);
 474     return(TRUE);
 475   }
 476 }
 477
 478
 479 /* Open a TCP Socket */
 480 int OpenTCPSocket (void)
 481 {
 482   int sockfd;
 483   int on = 0;
 484   struct linger linger = { 0 };
 485
 486   if ((sockfd = socket (AF_INET, SOCK_STREAM, 0)) < 0)
 487     return (ERROR);
 488   else
 489   {
 490     setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (const char*)&on, sizeof(on));
 491     /* This is BSD compatible, setting l_onoff to 0 is *NOT* http://web.irc.org/mla/ircd-dev/msg02259.html */
 492     linger.l_onoff = 1;
 493     linger.l_linger = 0;
 494     setsockopt(sockfd, SOL_SOCKET, SO_LINGER, (const char*)&linger,sizeof(linger));
 495     return (sockfd);
 496   }
 497 }
 498