src/inspircd_io.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  Inspire is copyright (C) 2002-2004 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 using namespace std;
  18
  19 #include "inspircd_config.h"
  20 #include <sys/time.h>
  21 #include <sys/resource.h>
  22 #include <sys/types.h>
  23 #include <string>
  24 #include <unistd.h>
  25 #include <sstream>
  26 #include <iostream>
  27 #include <fstream>
  28 #include "inspircd.h"
  29 #include "inspircd_io.h"
  30 #include "inspircd_util.h"
  31 #include "inspstring.h"
  32 #include "helperfuncs.h"
  33
  34 extern FILE *log_file;
  35 extern int boundPortCount;
  36 extern int openSockfd[MAXSOCKS];
  37 extern time_t TIME;
  38 extern bool unlimitcore;
  39 extern int MaxConn;
  40 std::vector<std::string> include_stack;
  41
  42 void WriteOpers(char* text, ...);
  43
  44 void Exit (int status)
  45 {
  46         if (log_file)
  47                 fclose(log_file);
  48         send_error("Server shutdown.");
  49         exit (status);
  50 }
  51
  52 void Killed(int status)
  53 {
  54         if (log_file)
  55                 fclose(log_file);
  56         send_error("Server terminated.");
  57         exit(status);
  58 }
  59
  60 void Rehash(int status)
  61 {
  62         WriteOpers("Rehashing config file %s due to SIGHUP",CONFIG_FILE);
  63         ReadConfig(false,NULL);
  64 }
  65
  66
  67
  68 void Start (void)
  69 {
  70         printf("\033[1;32mInspire Internet Relay Chat Server, compiled %s at %s\n",__DATE__,__TIME__);
  71         printf("(C) ChatSpike Development team.\033[0m\n\n");
  72         printf("Developers:\033[1;32m     Brain, FrostyCoolSlug\033[0m\n");
  73         printf("Documentation:\033[1;32m  FrostyCoolSlug, w00t\033[0m\n");
  74         printf("Testers:\033[1;32m        typobox43, piggles, Lord_Zathras, CC\033[0m\n");
  75         printf("Name concept:\033[1;32m   Lord_Zathras\033[0m\n\n");
  76 }
  77
  78 void WritePID(std::string filename)
  79 {
  80         ofstream outfile(filename.c_str());
  81         if (outfile.is_open())
  82         {
  83                 outfile << getpid();
  84                 outfile.close();
  85         }
  86         else
  87         {
  88                 printf("Failed to write PID-file '%s', exiting.\n",filename.c_str());
  89                 log(DEFAULT,"Failed to write PID-file '%s', exiting.",filename.c_str());
  90                 Exit(0);
  91         }
  92 }
  93
  94
  95 int DaemonSeed (void)
  96 {
  97         int childpid;
  98         signal (SIGALRM, SIG_IGN);
  99         signal (SIGHUP, Rehash);
 100         signal (SIGPIPE, SIG_IGN);
 101         signal (SIGTERM, Exit);
 102         signal (SIGSEGV, Error);
 103         if ((childpid = fork ()) < 0)
 104                 return (ERROR);
 105         else if (childpid > 0)
 106                 exit (0);
 107         setsid ();
 108         umask (007);
 109         printf("InspIRCd Process ID: \033[1;32m%lu\033[0m\n",(unsigned long)getpid());
 110         freopen("/dev/null","w",stdout);
 111         freopen("/dev/null","w",stderr);
 112
 113         setpriority(PRIO_PROCESS,(int)getpid(),15);
 114
 115         if (unlimitcore)
 116         {
 117                 rlimit rl;
 118                 if (getrlimit(RLIMIT_CORE, &rl) == -1)
 119                 {
 120                         log(DEFAULT,"Failed to getrlimit()!");
 121                         return(FALSE);
 122                 }
 123                 else
 124                 {
 125                         rl.rlim_cur = rl.rlim_max;
 126                         if (setrlimit(RLIMIT_CORE, &rl) == -1)
 127                                 log(DEFAULT,"setrlimit() failed, cannot increase coredump size.");
 128                 }
 129         }
 130
 131         return (TRUE);
 132 }
 133
 134
 135 /* Make Sure Modules Are Avaliable!
 136  * (BugFix By Craig.. See? I do work! :p)
 137  * Modified by brain, requires const char*
 138  * to work with other API functions
 139  */
 140
 141 bool FileExists (const char* file)
 142 {
 143         FILE *input;
 144         if ((input = fopen (file, "r")) == NULL)
 145         {
 146                 return(false);
 147         }
 148         else
 149         {
 150                 fclose (input);
 151                 return(true);
 152         }
 153 }
 154
 155 /* ConfProcess does the following things to a config line in the following order:
 156  *
 157  * Processes the line for syntax errors as shown below
 158  *      (1) Line void of quotes or equals (a malformed, illegal tag format)
 159  *      (2) Odd number of quotes on the line indicating a missing quote
 160  *      (3) number of equals signs not equal to number of quotes / 2 (missing an equals sign)
 161  *      (4) Spaces between the opening bracket (<) and the keyword
 162  *      (5) Spaces between a keyword and an equals sign
 163  *      (6) Spaces between an equals sign and a quote
 164  * Removes trailing spaces
 165  * Removes leading spaces
 166  * Converts tabs to spaces
 167  * Turns multiple spaces that are outside of quotes into single spaces
 168  */
 169
 170 std::string ConfProcess(char* buffer, long linenumber, std::stringstream* errorstream, bool &error, std::string filename)
 171 {
 172         long number_of_quotes = 0;
 173         long number_of_equals = 0;
 174         bool has_open_bracket = false;
 175         bool in_quotes = false;
 176         error = false;
 177         if (!buffer)
 178         {
 179                 return "";
 180         }
 181         // firstly clean up the line by stripping spaces from the start and end and converting tabs to spaces
 182         for (unsigned int d = 0; d < strlen(buffer); d++)
 183                 if ((buffer[d]) == 9)
 184                         buffer[d] = ' ';
 185         while ((buffer[0] == ' ') && (strlen(buffer)>0)) buffer++;
 186         while ((buffer[strlen(buffer)-1] == ' ') && (strlen(buffer)>0)) buffer[strlen(buffer)-1] = '\0';
 187
 188         // empty lines are syntactically valid, as are comments
 189         if (!(*buffer) || buffer[0] == '#')
 190                 return "";
 191
 192         for (unsigned int c = 0; c < strlen(buffer); c++)
 193         {
 194                 // convert all spaces that are OUTSIDE quotes into hardspace (0xA0) as this will make them easier to
 195                 // search and replace later :)
 196                 if ((!in_quotes) && (buffer[c] == ' '))
 197                         buffer[c] = '\xA0';
 198                 if ((buffer[c] == '<') && (!in_quotes))
 199                 {
 200                         has_open_bracket = true;
 201                         if (strlen(buffer) == 1)
 202                         {
 203                                 *errorstream << "Tag without identifier at " << filename << ":" << linenumber << endl;
 204                                 error = true;
 205                                 return "";
 206                         }
 207                         else if ((tolower(buffer[c+1]) < 'a') || (tolower(buffer[c+1]) > 'z'))
 208                         {
 209                                 *errorstream << "Invalid characters in identifier at " << filename << ":" << linenumber << endl;
 210                                 error = true;
 211                                 return "";
 212                         }
 213                 }
 214                 if (buffer[c] == '"')
 215                 {
 216                         number_of_quotes++;
 217                         in_quotes = (!in_quotes);
 218                 }
 219                 if ((buffer[c] == '=') && (!in_quotes))
 220                 {
 221                         number_of_equals++;
 222                         if (strlen(buffer) == c)
 223                         {
 224                                 *errorstream << "Variable without a value at " << filename << ":" << linenumber << endl;
 225                                 error = true;
 226                                 return "";
 227                         }
 228                         else if (buffer[c+1] != '"')
 229                         {
 230                                 *errorstream << "Variable name not followed immediately by its value at " << filename << ":" << linenumber << endl;
 231                                 error = true;
 232                                 return "";
 233                         }
 234                         else if (!c)
 235                         {
 236                                 *errorstream << "Value without a variable (line starts with '=') at " << filename << ":" << linenumber << endl;
 237                                 error = true;
 238                                 return "";
 239                         }
 240                         else if (buffer[c-1] == '\xA0')
 241                         {
 242                                 *errorstream << "Variable name not followed immediately by its value at " << filename << ":" << linenumber << endl;
 243                                 error = true;
 244                                 return "";
 245                         }
 246                 }
 247         }
 248         // no quotes, and no equals. something freaky.
 249         if ((!number_of_quotes) || (!number_of_equals) && (strlen(buffer)>2) && (buffer[0]=='<'))
 250         {
 251                 *errorstream << "Malformed tag at " << filename << ":" << linenumber << endl;
 252                 error = true;
 253                 return "";
 254         }
 255         // odd number of quotes. thats just wrong.
 256         if ((number_of_quotes % 2) != 0)
 257         {
 258                 *errorstream << "Missing \" at " << filename << ":" << linenumber << endl;
 259                 error = true;
 260                 return "";
 261         }
 262         if (number_of_equals < (number_of_quotes/2))
 263         {
 264                 *errorstream << "Missing '=' at " << filename << ":" << linenumber << endl;
 265         }
 266         if (number_of_equals > (number_of_quotes/2))
 267         {
 268                 *errorstream << "Too many '=' at " << filename << ":" << linenumber << endl;
 269         }
 270
 271         std::string parsedata = buffer;
 272         // turn multispace into single space
 273         while (parsedata.find("\xA0\xA0") != std::string::npos)
 274         {
 275                 parsedata.erase(parsedata.find("\xA0\xA0"),1);
 276         }
 277
 278         // turn our hardspace back into softspace
 279         for (unsigned int d = 0; d < parsedata.length(); d++)
 280         {
 281                 if (parsedata[d] == '\xA0')
 282                         parsedata[d] = ' ';
 283         }
 284
 285         // and we're done, the line is fine!
 286         return parsedata;
 287 }
 288
 289 /* A special version of fgets that will read \r, \n, \r\n or even \n\r, it doesnt care :-) */
 290
 291 int fgets_safe(char* buffer, size_t maxsize, FILE* &file)
 292 {
 293         char c_read = '\0';
 294         unsigned int bufptr = 0;
 295         while ((!feof(file)) && (c_read != '\n') && (c_read != '\r') && (bufptr < maxsize))
 296         {
 297                 c_read = fgetc(file);
 298                 if ((c_read != '\n') && (c_read != '\r'))
 299                         buffer[bufptr++] = c_read;
 300         }
 301         buffer[bufptr] = '\0';
 302         return bufptr;
 303 }
 304
 305 bool LoadConf(const char* filename, std::stringstream *target, std::stringstream* errorstream)
 306 {
 307         target->str("");
 308         errorstream->str("");
 309         long linenumber = 1;
 310         // first, check that the file exists before we try to do anything with it
 311         if (!FileExists(filename))
 312         {
 313                 *errorstream << "File " << filename << " not found." << endl;
 314                 return false;
 315         }
 316         // Fix the chmod of the file to restrict it to the current user and group
 317         chmod(filename,0600);
 318         for (unsigned int t = 0; t < include_stack.size(); t++)
 319         {
 320                 if (std::string(filename) == include_stack[t])
 321                 {
 322                         *errorstream << "File " << filename << " is included recursively (looped inclusion)." << endl;
 323                         return false;
 324                 }
 325         }
 326         include_stack.push_back(filename);
 327         // now open it
 328         FILE* conf = fopen(filename,"r");
 329         char buffer[MAXBUF];
 330         if (conf)
 331         {
 332                 while (!feof(conf))
 333                 {
 334                         *buffer = 0;
 335                         if (fgets_safe(buffer, MAXBUF, conf))
 336                         {
 337                                 /*if ((!feof(conf)) && (buffer) && (strlen(buffer)))*/
 338                                 if ((buffer) && (strlen(buffer)) && (*buffer > '\r'))
 339                                 {
 340                                         if ((buffer[0] != '#') && (buffer[0] != '\r')  && (buffer[0] != '\n'))
 341                                         {
 342                                                 if (!strncmp(buffer,"<include file=\"",15))
 343                                                 {
 344                                                         char* buf = buffer;
 345                                                         char confpath[10240],newconf[10240];
 346                                                         // include file directive
 347                                                         buf += 15;      // advance to filename
 348                                                         for (unsigned int j = 0; j < strlen(buf); j++)
 349                                                         {
 350                                                                 if (buf[j] == '\\')
 351                                                                         buf[j] = '/';
 352                                                                 if (buf[j] == '"')
 353                                                                 {
 354                                                                         buf[j] = '\0';
 355                                                                         break;
 356                                                                 }
 357                                                         }
 358                                                         log(DEFAULT,"Opening included file '%s'",buf);
 359                                                         if (*buf != '/')
 360                                                         {
 361                                                                 strlcpy(confpath,CONFIG_FILE,10240);
 362                                                                 if (strstr(confpath,"/inspircd.conf"))
 363                                                                 {
 364                                                                         // leaves us with just the path
 365                                                                         *(strstr(confpath,"/inspircd.conf")) = '\0';
 366                                                                 }
 367                                                                 snprintf(newconf,10240,"%s/%s",confpath,buf);
 368                                                         }
 369                                                         else snprintf(newconf,10240,"%s",buf);
 370                                                         std::stringstream merge(stringstream::in | stringstream::out);
 371                                                         // recursively call LoadConf and get the new data, use the same errorstream
 372                                                         if (LoadConf(newconf, &merge, errorstream))
 373                                                         {
 374                                                                 // append to the end of the file
 375                                                                 std::string newstuff = merge.str();
 376                                                                 *target << newstuff;
 377                                                         }
 378                                                         else
 379                                                         {
 380                                                                 // the error propogates up to its parent recursively
 381                                                                 // causing the config reader to bail at the top level.
 382                                                                 fclose(conf);
 383                                                                 return false;
 384                                                         }
 385                                                 }
 386                                                 else
 387                                                 {
 388                                                         bool error = false;
 389                                                         std::string data = ConfProcess(buffer,linenumber++,errorstream,error,filename);
 390                                                         if (error)
 391                                                         {
 392                                                                 return false;
 393                                                         }
 394                                                         *target << data;
 395                                                 }
 396                                         }
 397                                         else linenumber++;
 398                                 }
 399                         }
 400                 }
 401                 fclose(conf);
 402         }
 403         target->seekg(0);
 404         return true;
 405 }
 406
 407 /* Counts the number of tags of a certain type within the config file, e.g. to enumerate opers */
 408
 409 int EnumConf(std::stringstream *config, const char* tag)
 410 {
 411         int ptr = 0;
 412         char buffer[MAXBUF], c_tag[MAXBUF], c, lastc;
 413         int in_token, in_quotes, tptr, idx = 0;
 414
 415         const char* buf = config->str().c_str();
 416         long bptr = 0;
 417         long len = strlen(buf);
 418
 419         ptr = 0;
 420         in_token = 0;
 421         in_quotes = 0;
 422         lastc = '\0';
 423         while (bptr<len)
 424         {
 425                 lastc = c;
 426                 c = buf[bptr++];
 427                 if ((c == '#') && (lastc == '\n'))
 428                 {
 429                         while ((c != '\n') && (bptr<len))
 430                         {
 431                                 lastc = c;
 432                                 c = buf[bptr++];
 433                         }
 434                 }
 435                 if ((c == '<') && (!in_quotes))
 436                 {
 437                         tptr = 0;
 438                         in_token = 1;
 439                         do {
 440                                 c = buf[bptr++];
 441                                 if (c != ' ')
 442                                 {
 443                                         c_tag[tptr++] = c;
 444                                         c_tag[tptr] = '\0';
 445                                 }
 446                         } while (c != ' ');
 447                 }
 448                 if (c == '"')
 449                 {
 450                         in_quotes = (!in_quotes);
 451                 }
 452                 if ((c == '>') && (!in_quotes))
 453                 {
 454                         in_token = 0;
 455                         if (!strcmp(c_tag,tag))
 456                         {
 457                                 /* correct tag, but wrong index */
 458                                 idx++;
 459                         }
 460                         c_tag[0] = '\0';
 461                         buffer[0] = '\0';
 462                         ptr = 0;
 463                         tptr = 0;
 464                 }
 465                 if (c != '>')
 466                 {
 467                         if ((in_token) && (c != '\n') && (c != '\r'))
 468                         {
 469                                 buffer[ptr++] = c;
 470                                 buffer[ptr] = '\0';
 471                         }
 472                 }
 473         }
 474         return idx;
 475 }
 476
 477 /* Counts the number of values within a certain tag */
 478
 479 int EnumValues(std::stringstream *config, const char* tag, int index)
 480 {
 481         int ptr = 0;
 482         char buffer[MAXBUF], c_tag[MAXBUF], c, lastc;
 483         int in_token, in_quotes, tptr, idx = 0;
 484
 485         bool correct_tag = false;
 486         int num_items = 0;
 487
 488         const char* buf = config->str().c_str();
 489         long bptr = 0;
 490         long len = strlen(buf);
 491
 492         ptr = 0;
 493         in_token = 0;
 494         in_quotes = 0;
 495         lastc = '\0';
 496         while (bptr<len)
 497         {
 498                 lastc = c;
 499                 c = buf[bptr++];
 500                 if ((c == '#') && (lastc == '\n'))
 501                 {
 502                         while ((c != '\n') && (bptr<len))
 503                         {
 504                                 lastc = c;
 505                                 c = buf[bptr++];
 506                         }
 507                 }
 508                 if ((c == '<') && (!in_quotes))
 509                 {
 510                         tptr = 0;
 511                         in_token = 1;
 512                         do {
 513                                 c = buf[bptr++];
 514                                 if (c != ' ')
 515                                 {
 516                                         c_tag[tptr++] = c;
 517                                         c_tag[tptr] = '\0';
 518
 519                                         if ((!strcmp(c_tag,tag)) && (idx == index))
 520                                         {
 521                                                 correct_tag = true;
 522                                         }
 523                                 }
 524                         } while (c != ' ');
 525                 }
 526                 if (c == '"')
 527                 {
 528                         in_quotes = (!in_quotes);
 529                 }
 530
 531                 if ( (correct_tag) && (!in_quotes) && ( (c == ' ') || (c == '\n') || (c == '\r') ) )
 532                 {
 533                         num_items++;
 534                 }
 535                 if ((c == '>') && (!in_quotes))
 536                 {
 537                         in_token = 0;
 538                         if (correct_tag)
 539                                 correct_tag = false;
 540                         if (!strcmp(c_tag,tag))
 541                         {
 542                                 /* correct tag, but wrong index */
 543                                 idx++;
 544                         }
 545                         c_tag[0] = '\0';
 546                         buffer[0] = '\0';
 547                         ptr = 0;
 548                         tptr = 0;
 549                 }
 550                 if (c != '>')
 551                 {
 552                         if ((in_token) && (c != '\n') && (c != '\r'))
 553                         {
 554                                 buffer[ptr++] = c;
 555                                 buffer[ptr] = '\0';
 556                         }
 557                 }
 558         }
 559         return num_items+1;
 560 }
 561
 562
 563
 564 int ConfValueEnum(char* tag, std::stringstream* config)
 565 {
 566         return EnumConf(config,tag);
 567 }
 568
 569
 570
 571 /* Retrieves a value from the config file. If there is more than one value of the specified
 572  * key and section (e.g. for opers etc) then the index value specifies which to retreive, e.g.
 573  *
 574  * ConfValue("oper","name",2,result);
 575  */
 576
 577 int ReadConf(std::stringstream *config, const char* tag, const char* var, int index, char *result)
 578 {
 579         int ptr = 0;
 580         char buffer[65535], c_tag[MAXBUF], c, lastc;
 581         int in_token, in_quotes, tptr, idx = 0;
 582         char* key;
 583
 584         const char* buf = config->str().c_str();
 585         long bptr = 0;
 586         long len = config->str().length();
 587
 588         ptr = 0;
 589         in_token = 0;
 590         in_quotes = 0;
 591         lastc = '\0';
 592         c_tag[0] = '\0';
 593         buffer[0] = '\0';
 594         while (bptr<len)
 595         {
 596                 lastc = c;
 597                 c = buf[bptr++];
 598                 // FIX: Treat tabs as spaces
 599                 if (c == 9)
 600                         c = 32;
 601                 if ((c == '<') && (!in_quotes))
 602                 {
 603                         tptr = 0;
 604                         in_token = 1;
 605                         do {
 606                                 c = buf[bptr++];
 607                                 if (c != ' ')
 608                                 {
 609                                         c_tag[tptr++] = c;
 610                                         c_tag[tptr] = '\0';
 611                                 }
 612                         // FIX: Tab can follow a tagname as well as space.
 613                         } while ((c != ' ') && (c != 9));
 614                 }
 615                 if (c == '"')
 616                 {
 617                         in_quotes = (!in_quotes);
 618                 }
 619                 if ((c == '>') && (!in_quotes))
 620                 {
 621                         in_token = 0;
 622                         if (idx == index)
 623                         {
 624                                 if (!strcmp(c_tag,tag))
 625                                 {
 626                                         if ((buffer) && (c_tag) && (var))
 627                                         {
 628                                                 key = strstr(buffer,var);
 629                                                 if (!key)
 630                                                 {
 631                                                         /* value not found in tag */
 632                                                         strcpy(result,"");
 633                                                         return 0;
 634                                                 }
 635                                                 else
 636                                                 {
 637                                                         key+=strlen(var);
 638                                                         while (key[0] !='"')
 639                                                         {
 640                                                                 if (!strlen(key))
 641                                                                 {
 642                                                                         /* missing quote */
 643                                                                         strcpy(result,"");
 644                                                                         return 0;
 645                                                                 }
 646                                                                 key++;
 647                                                         }
 648                                                         key++;
 649                                                         for (unsigned j = 0; j < strlen(key); j++)
 650                                                         {
 651                                                                 if (key[j] == '"')
 652                                                                 {
 653                                                                         key[j] = '\0';
 654                                                                 }
 655                                                         }
 656                                                         strlcpy(result,key,MAXBUF);
 657                                                         return 1;
 658                                                 }
 659                                         }
 660                                 }
 661                         }
 662                         if (!strcmp(c_tag,tag))
 663                         {
 664                                 /* correct tag, but wrong index */
 665                                 idx++;
 666                         }
 667                         c_tag[0] = '\0';
 668                         buffer[0] = '\0';
 669                         ptr = 0;
 670                         tptr = 0;
 671                 }
 672                 if (c != '>')
 673                 {
 674                         if ((in_token) && (c != '\n') && (c != '\r'))
 675                         {
 676                                 buffer[ptr++] = c;
 677                                 buffer[ptr] = '\0';
 678                         }
 679                 }
 680         }
 681         strcpy(result,""); // value or its tag not found at all
 682         return 0;
 683 }
 684
 685
 686
 687 int ConfValue(char* tag, char* var, int index, char *result,std::stringstream *config)
 688 {
 689         ReadConf(config, tag, var, index, result);
 690         return 0;
 691 }
 692
 693
 694
 695 // This will bind a socket to a port. It works for UDP/TCP
 696 int BindSocket (int sockfd, struct sockaddr_in client, struct sockaddr_in server, int port, char* addr)
 697 {
 698         memset((char *)&server,0,sizeof(server));
 699         struct in_addr addy;
 700         inet_aton(addr,&addy);
 701         server.sin_family = AF_INET;
 702         if (!strcmp(addr,""))
 703         {
 704                 server.sin_addr.s_addr = htonl(INADDR_ANY);
 705         }
 706         else
 707         {
 708                 server.sin_addr = addy;
 709         }
 710         server.sin_port = htons(port);
 711         if (bind(sockfd,(struct sockaddr*)&server,sizeof(server))<0)
 712         {
 713                 return(ERROR);
 714         }
 715         else
 716         {
 717                 listen(sockfd, MaxConn);
 718                 return(TRUE);
 719         }
 720 }
 721
 722
 723 // Open a TCP Socket
 724 int OpenTCPSocket (void)
 725 {
 726         int sockfd;
 727         int on = 1;
 728         struct linger linger = { 0 };
 729
 730         if ((sockfd = socket (AF_INET, SOCK_STREAM, 0)) < 0)
 731                 return (ERROR);
 732         else
 733         {
 734                 setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (const char*)&on, sizeof(on));
 735                 /* This is BSD compatible, setting l_onoff to 0 is *NOT* http://web.irc.org/mla/ircd-dev/msg02259.html */
 736                 linger.l_onoff = 1;
 737                 linger.l_linger = 1;
 738                 setsockopt(sockfd, SOL_SOCKET, SO_LINGER, (const char*)&linger,sizeof(linger));
 739                 return (sockfd);
 740         }
 741 }
 742