src/tools.c

   1 /* tools.c - miscellaneous utility functions
   2  * Copyright 2000-2004 srvx Development Team
   3  *
   4  * This file is part of x3.
   5  *
   6  * srvx is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with srvx; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
  19  */
  20
  21 #include "helpfile.h"
  22 #include "log.h"
  23 #include "nickserv.h"
  24 #include "recdb.h"
  25
  26 #ifdef HAVE_NETDB_H
  27 #include <netdb.h>
  28 #endif
  29 #ifdef HAVE_SYS_SOCKET_H
  30 #include <sys/socket.h>
  31 #endif
  32 #ifdef HAVE_ARPA_INET_H
  33 #include <arpa/inet.h>
  34 #endif
  35
  36 #define NUMNICKLOG 6
  37 #define NUMNICKBASE (1 << NUMNICKLOG)
  38 #define NUMNICKMASK (NUMNICKBASE - 1)
  39
  40 /* Yes, P10's encoding here is almost-but-not-quite MIME Base64.  Yay
  41  * for gratuitous incompatibilities. */
  42 static const char convert2y[256] = {
  43   'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P',
  44   'Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f',
  45   'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v',
  46   'w','x','y','z','0','1','2','3','4','5','6','7','8','9','[',']'
  47 };
  48
  49 static const unsigned char convert2n[256] = {
  50    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  51    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  52    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  53   52,53,54,55,56,57,58,59,60,61, 0, 0, 0, 0, 0, 0,
  54    0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,
  55   15,16,17,18,19,20,21,22,23,24,25,62, 0,63, 0, 0,
  56    0,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,
  57   41,42,43,44,45,46,47,48,49,50,51, 0, 0, 0, 0, 0
  58 };
  59
  60 unsigned long int
  61 base64toint(const char* s, int count)
  62 {
  63     unsigned int i = 0;
  64     while (*s && count) {
  65         i = (i << NUMNICKLOG) + convert2n[(unsigned char)*s++];
  66         count--;
  67     }
  68     return i;
  69 }
  70
  71 const char* inttobase64(char* buf, unsigned int v, unsigned int count)
  72 {
  73   buf[count] = '\0';
  74   while (count > 0) {
  75       buf[--count] = convert2y[(unsigned char)(v & NUMNICKMASK)];
  76       v >>= NUMNICKLOG;
  77   }
  78   return buf;
  79 }
  80
  81 static char irc_tolower[256];
  82 #undef tolower
  83 #define tolower(X) irc_tolower[(unsigned char)(X)]
  84
  85 int
  86 irccasecmp(const char *stra, const char *strb) {
  87     while (*stra && (tolower(*stra) == tolower(*strb)))
  88         stra++, strb++;
  89     return tolower(*stra) - tolower(*strb);
  90 }
  91
  92 int
  93 ircncasecmp(const char *stra, const char *strb, unsigned int len) {
  94     len--;
  95     while (*stra && (tolower(*stra) == tolower(*strb)) && len)
  96         stra++, strb++, len--;
  97     return tolower(*stra) - tolower(*strb);
  98 }
  99
 100 const char *
 101 irccasestr(const char *haystack, const char *needle) {
 102     unsigned int hay_len = strlen(haystack), needle_len = strlen(needle), pos;
 103     if (hay_len < needle_len)
 104         return NULL;
 105     for (pos=0; pos<hay_len+1-needle_len; ++pos) {
 106         if ((tolower(haystack[pos]) == tolower(*needle))
 107             && !ircncasecmp(haystack+pos, needle, needle_len))
 108             return haystack+pos;
 109     }
 110     return NULL;
 111 }
 112
 113 int
 114 split_line(char *line, int irc_colon, int argv_size, char *argv[])
 115 {
 116     int argc = 0;
 117     int n;
 118     while (*line && (argc < argv_size)) {
 119         while (*line == ' ')
 120             *line++ = 0;
 121         if (*line == ':' && irc_colon && argc > 0) {
 122             /* the rest is a single parameter */
 123             argv[argc++] = line + 1;
 124             break;
 125         }
 126         if (!*line)
 127             break;
 128         argv[argc++] = line;
 129         if (argc >= argv_size)
 130             break;
 131         while (*line != ' ' && *line)
 132             line++;
 133     }
 134 #ifdef NDEBUG
 135     n = 0;
 136 #else
 137     for (n=argc; n<argv_size; n++)
 138         argv[n] = (char*)0xFEEDBEEF;
 139 #endif
 140     return argc;
 141 }
 142
 143 /* This is ircu's mmatch() function, from match.c. */
 144 int mmatch(const char *old_mask, const char *new_mask)
 145 {
 146   register const char *m = old_mask;
 147   register const char *n = new_mask;
 148   const char *ma = m;
 149   const char *na = n;
 150   int wild = 0;
 151   int mq = 0, nq = 0;
 152
 153   while (1)
 154   {
 155     if (*m == '*')
 156     {
 157       while (*m == '*')
 158         m++;
 159       wild = 1;
 160       ma = m;
 161       na = n;
 162     }
 163
 164     if (!*m)
 165     {
 166       if (!*n)
 167         return 0;
 168       for (m--; (m > old_mask) && (*m == '?'); m--)
 169         ;
 170       if ((*m == '*') && (m > old_mask) && (m[-1] != '\\'))
 171         return 0;
 172       if (!wild)
 173         return 1;
 174       m = ma;
 175
 176       /* Added to `mmatch' : Because '\?' and '\*' now is one character: */
 177       if ((*na == '\\') && ((na[1] == '*') || (na[1] == '?')))
 178         ++na;
 179
 180       n = ++na;
 181     }
 182     else if (!*n)
 183     {
 184       while (*m == '*')
 185         m++;
 186       return (*m != 0);
 187     }
 188     if ((*m == '\\') && ((m[1] == '*') || (m[1] == '?')))
 189     {
 190       m++;
 191       mq = 1;
 192     }
 193     else
 194       mq = 0;
 195
 196     /* Added to `mmatch' : Because '\?' and '\*' now is one character: */
 197     if ((*n == '\\') && ((n[1] == '*') || (n[1] == '?')))
 198     {
 199       n++;
 200       nq = 1;
 201     }
 202     else
 203       nq = 0;
 204
 205 /*
 206  * This `if' has been changed compared to match() to do the following:
 207  * Match when:
 208  *   old (m)         new (n)         boolean expression
 209  *    *               any             (*m == '*' && !mq) ||
 210  *    ?               any except '*'  (*m == '?' && !mq && (*n != '*' || nq)) ||
 211  * any except * or ?  same as m       (!((*m == '*' || *m == '?') && !mq) &&
 212  *                                      toLower(*m) == toLower(*n) &&
 213  *                                        !((mq && !nq) || (!mq && nq)))
 214  *
 215  * Here `any' also includes \* and \? !
 216  *
 217  * After reworking the boolean expressions, we get:
 218  * (Optimized to use boolean shortcircuits, with most frequently occuring
 219  *  cases upfront (which took 2 hours!)).
 220  */
 221     if ((*m == '*' && !mq) ||
 222         ((!mq || nq) && tolower(*m) == tolower(*n)) ||
 223         (*m == '?' && !mq && (*n != '*' || nq)))
 224     {
 225       if (*m)
 226         m++;
 227       if (*n)
 228         n++;
 229     }
 230     else
 231     {
 232       if (!wild)
 233         return 1;
 234       m = ma;
 235
 236       /* Added to `mmatch' : Because '\?' and '\*' now is one character: */
 237       if ((*na == '\\') && ((na[1] == '*') || (na[1] == '?')))
 238         ++na;
 239
 240       n = ++na;
 241     }
 242   }
 243 }
 244
 245 int
 246 match_ircglob(const char *text, const char *glob)
 247 {
 248     const char *m = glob, *n = text;
 249     const char *m_tmp = glob, *n_tmp = text;
 250     int star_p;
 251
 252     for (;;) switch (*m) {
 253     case '\0':
 254         if (!*n)
 255             return 1;
 256     backtrack:
 257         if (m_tmp == glob)
 258             return 0;
 259         m = m_tmp;
 260         n = ++n_tmp;
 261         break;
 262     case '\\':
 263         m++;
 264         /* allow escaping to force capitalization */
 265         if (*m++ != *n++)
 266             return 0;
 267         break;
 268     case '*': case '?':
 269         for (star_p = 0; ; m++) {
 270             if (*m == '*')
 271                 star_p = 1;
 272             else if (*m == '?') {
 273                 if (!*n++)
 274                     goto backtrack;
 275             } else break;
 276         }
 277         if (star_p) {
 278             if (!*m)
 279                 return 1;
 280             else if (*m == '\\') {
 281                 m_tmp = ++m;
 282                 if (!*m)
 283                     return 0;
 284                 for (n_tmp = n; *n && *n != *m; n++) ;
 285             } else {
 286                 m_tmp = m;
 287                 for (n_tmp = n; *n && tolower(*n) != tolower(*m); n++) ;
 288             }
 289         }
 290         /* and fall through */
 291     default:
 292         if (!*n)
 293             return *m == '\0';
 294         if (tolower(*m) != tolower(*n))
 295             goto backtrack;
 296         m++;
 297         n++;
 298         break;
 299     }
 300 }
 301
 302 extern const char *hidden_host_suffix;
 303
 304 /* Prevent *@* *@** *@*a* type masks, while allowing anything else. This is the best way iv found to detect
 305  * a global matching mask; if it matches this string, it'll match almost anything :) */
 306 int is_overmask(char *mask)
 307 {
 308     return(match_ircglob("abcdefghijklmnopqrstuv!frcmbghilnrtoasde@apdic.yfa.dsfsdaffsdasfdasfd.abcdefghijklmnopqrstuvwxyz.asdfasfdfsdsfdasfda.ydfbe", mask));
 309 }
 310
 311 int user_matches_glob(struct userNode *user, const char *orig_glob, int include_nick)
 312 {
 313     /* A new glob function, the old one had many false positives.
 314      * look at IsSetHost(user) etc and include_nick, build a nick!user@host string
 315      * from user and save it in a variable. Compare with match_ircglob() and
 316      * return the results. Match any of the possible user@host combos (ugh) -Rubin
 317      */
 318     char *matchstr_user;
 319     char *matchstr_host;
 320     char *matchstr_full = NULL;
 321
 322     if(IsSetHost(user))   /* S: line sethosts */
 323     {
 324         /* Grab host and user from sethost instead of real host */
 325         char *buff;
 326         buff = alloca(strlen(user->sethost) + 1);
 327         strcpy(buff, user->sethost);
 328         matchstr_user = mysep(&buff, "@");
 329         matchstr_host = mysep(&buff, "@");
 330
 331         matchstr_full = alloca(strlen(user->nick) + strlen(matchstr_user) + strlen(matchstr_host) + 4);
 332         if(include_nick)
 333             sprintf(matchstr_full, "%s!%s@%s", user->nick, matchstr_user, matchstr_host);
 334         else
 335             sprintf(matchstr_full, "%s@%s", matchstr_user, matchstr_host);
 336         if(match_ircglob(matchstr_full, orig_glob))
 337             return(1);
 338     }
 339     else if(IsFakeHost(user))  /* Fakehost */
 340     {
 341         matchstr_full = alloca(strlen(user->nick) + strlen(user->ident) + strlen(user->fakehost) + 4);
 342         if(include_nick)
 343             sprintf(matchstr_full, "%s!%s@%s", user->nick, user->ident, user->fakehost);
 344         else
 345             sprintf(matchstr_full, "%s@%s", user->ident, user->fakehost);
 346         if(match_ircglob(matchstr_full, orig_glob))
 347             return(1);
 348     }
 349     else if(hidden_host_suffix && user->handle_info)  /* name.users.network.org  host */
 350     {
 351         matchstr_host = alloca(strlen(user->handle_info->handle) + strlen(hidden_host_suffix) + 2);
 352         sprintf(matchstr_host, "%s.%s", user->handle_info->handle, hidden_host_suffix);
 353         matchstr_user = user->ident;
 354
 355         matchstr_full = alloca(strlen(user->nick) + strlen(user->ident) + strlen(matchstr_host) + 4);
 356         if(include_nick)
 357             sprintf(matchstr_full, "%s!%s@%s", user->nick, user->ident, matchstr_host);
 358         else
 359             sprintf(matchstr_full, "%s@%s", user->ident, matchstr_host);
 360         if(match_ircglob(matchstr_full, orig_glob))
 361             return(1);
 362     }
 363
 364     /* Check normal hostname */
 365     matchstr_full = alloca(strlen(user->nick) + strlen(user->ident) + strlen(user->hostname) + 4);
 366     if(include_nick)
 367         sprintf(matchstr_full, "%s!%s@%s", user->nick, user->ident, user->hostname);
 368     else
 369         sprintf(matchstr_full, "%s@%s", user->ident, user->hostname);
 370     if(match_ircglob(matchstr_full, orig_glob))
 371             return(1);
 372
 373     /* Check IP hostname (could skip this if same as above?)*/
 374     matchstr_host = inet_ntoa(user->ip);
 375     matchstr_full = alloca(strlen(user->nick) + strlen(user->ident) + strlen(matchstr_host) + 4);
 376     if(include_nick)
 377         sprintf(matchstr_full, "%s!%s@%s", user->nick, user->ident, matchstr_host);
 378     else
 379         sprintf(matchstr_full, "%s@%s", user->ident, matchstr_host);
 380     if(match_ircglob(matchstr_full, orig_glob))
 381             return(1);
 382
 383     return(0); /* Didnt match anything */
 384 }
 385
 386 int
 387 user_matches_glob_broken(struct userNode *user, const char *orig_glob, int include_nick)
 388 {
 389     char *glob, *marker;
 390     char *setident = NULL, *sethostname = NULL; // sethost - reed/apples
 391
 392     /* Make a writable copy of the glob */
 393     glob = alloca(strlen(orig_glob)+1);
 394     strcpy(glob, orig_glob);
 395     /* Check the nick, if it's present */
 396     if (include_nick) {
 397         if (!(marker = strchr(glob, '!'))) {
 398             log_module(MAIN_LOG, LOG_ERROR, "user_matches_glob(\"%s\", \"%s\", %d) called, and glob doesn't include a '!'", user->nick, orig_glob, include_nick);
 399             return 0;
 400         }
 401         *marker = 0;
 402         if (!match_ircglob(user->nick, glob)) return 0;
 403         glob = marker + 1;
 404     }
 405     /* Check the ident */
 406     if (!(marker = strchr(glob, '@'))) {
 407         log_module(MAIN_LOG, LOG_ERROR, "user_matches_glob(\"%s\", \"%s\", %d) called, and glob doesn't include an '@'", user->nick, orig_glob, include_nick);
 408         return 0;
 409     }
 410     *marker = 0;
 411
 412     // sethost - reed/apples
 413     if (IsSetHost(user)) {
 414       setident = alloca(strcspn(user->sethost, "@")+2);
 415       safestrncpy(setident, user->sethost, strcspn(user->sethost, "@")+1);
 416       sethostname = strchr(user->sethost, '@') + 1;
 417     }
 418
 419     if (!match_ircglob(user->ident, glob) && (IsSetHost(user) && !match_ircglob(setident, glob)))
 420         return 0;
 421     glob = marker + 1;
 422     /* If it might be an IP glob, test that. */
 423     if (!glob[strspn(glob, "0123456789./*?")]
 424         && match_ircglob(inet_ntoa(user->ip), glob))
 425         return 1;
 426     /* Check for a fakehost match. */
 427     if (IsFakeHost(user) && match_ircglob(user->fakehost, glob))
 428         return 1;
 429     if (IsSetHost(user) && match_ircglob(sethostname, glob))
 430         return 1;
 431     /* Check for an account match. */
 432     if (hidden_host_suffix && user->handle_info) {
 433         char hidden_host[HOSTLEN+1];
 434         snprintf(hidden_host, sizeof(hidden_host), "%s.%s", user->handle_info->handle, hidden_host_suffix);
 435         if (match_ircglob(hidden_host, glob))
 436             return 1;
 437     }
 438     /* None of the above; could only be a hostname match. */
 439     return match_ircglob(user->hostname, glob);
 440 }
 441
 442 int
 443 is_ircmask(const char *text)
 444 {
 445     while (*text && (isalnum((char)*text) || strchr("-_[]|\\`^{}?*", *text)))
 446         text++;
 447     if (*text++ != '!')
 448         return 0;
 449     while (*text && *text != '@' && !isspace((char)*text))
 450         text++;
 451     if (*text++ != '@')
 452         return 0;
 453     while (*text && !isspace((char)*text))
 454         text++;
 455     return !*text;
 456 }
 457
 458 int
 459 is_gline(const char *text)
 460 {
 461     if (*text == '@')
 462         return 0;
 463     text += strcspn(text, "@!% \t\r\n");
 464     if (*text++ != '@')
 465         return 0;
 466     if (!*text)
 467         return 0;
 468     while (*text && (isalnum((char)*text) || strchr(".-?*:", *text)))
 469         text++;
 470     return !*text;
 471 }
 472
 473 int
 474 split_ircmask(char *text, char **nick, char **ident, char **host)
 475 {
 476     char *start;
 477
 478     start = text;
 479     while (isalnum((char)*text) || strchr("=[]\\`^{}?*", *text))
 480         text++;
 481     if (*text != '!' || ((text - start) > NICKLEN))
 482         return 0;
 483     *text = 0;
 484     if (nick)
 485         *nick = start;
 486
 487     start = ++text;
 488     while (*text && *text != '@' && !isspace((char)*text))
 489         text++;
 490     if (*text != '@' || ((text - start) > USERLEN))
 491         return 0;
 492     *text = 0;
 493     if (ident)
 494         *ident = start;
 495
 496     start = ++text;
 497     while (*text && (isalnum((char)*text) || strchr(".-?*:", *text)))
 498         text++;
 499     if (host)
 500         *host = start;
 501     return !*text && ((text - start) <= HOSTLEN) && nick && ident && host;
 502 }
 503
 504 char *
 505 sanitize_ircmask(char *input)
 506 {
 507     unsigned int length, flag;
 508     char *mask, *start, *output;
 509
 510     /* Sanitize everything in place; input *must* be a valid
 511        hostmask. */
 512     output = input;
 513     flag = 0;
 514
 515     /* The nick is truncated at the end. */
 516     length = 0;
 517     mask = input;
 518     while(*input++ != '!')
 519     {
 520         length++;
 521     }
 522     if(length > NICKLEN)
 523     {
 524         mask += NICKLEN;
 525         *mask++ = '!';
 526
 527         /* This flag is used to indicate following parts should
 528            be shifted. */
 529         flag = 1;
 530     }
 531     else
 532     {
 533         mask = input;
 534     }
 535
 536     /* The ident and host must be truncated at the beginning and
 537        replaced with a '*' to be compatible with ircu. */
 538     length = 0;
 539     start = input;
 540     while(*input++ != '@')
 541     {
 542         length++;
 543     }
 544     if(length > USERLEN || flag)
 545     {
 546         if(length > USERLEN)
 547         {
 548             start = input - USERLEN;
 549             *mask++ = '*';
 550         }
 551         while(*start != '@')
 552         {
 553             *mask++ = *start++;
 554         }
 555         *mask++ = '@';
 556
 557         flag = 1;
 558     }
 559     else
 560     {
 561         mask = input;
 562     }
 563
 564     length = 0;
 565     start = input;
 566     while(*input++)
 567     {
 568         length++;
 569     }
 570     if(length > HOSTLEN || flag)
 571     {
 572         if(length > HOSTLEN)
 573         {
 574             start = input - HOSTLEN;
 575             *mask++ = '*';
 576         }
 577         while(*start)
 578         {
 579             *mask++ = *start++;
 580         }
 581         *mask = '\0';
 582     }
 583
 584     return output;
 585 }
 586
 587 static long
 588 TypeLength(char type)
 589 {
 590     switch (type) {
 591     case 'y': return 365*24*60*60;
 592     case 'M': return 30*24*60*60;
 593     case 'w': return 7*24*60*60;
 594     case 'd': return 24*60*60;
 595     case 'h': return 60*60;
 596     case 'm': return 60;
 597     case 's': return 1;
 598     default: return 0;
 599     }
 600 }
 601
 602 /* This function is not entirely accurate as it does not take into account leap units
 603  * or varying months. TODO: use proper dateadd functions to calculate real seconds
 604  * from now for the units (eg 1M should be give us seconds till todays date next month)
 605  */
 606 unsigned long
 607 ParseInterval(const char *interval)
 608 {
 609     unsigned long seconds = 0;
 610     int partial = 0;
 611     char c;
 612
 613     /* process the string, resetting the count if we find a unit character */
 614     while ((c = *interval++)) {
 615         if (isdigit((int)c)) {
 616             partial = partial*10 + c - '0';
 617         } else {
 618             seconds += TypeLength(c) * partial;
 619             partial = 0;
 620         }
 621     }
 622     /* assume the last chunk is seconds (the normal case) */
 623     return seconds + partial;
 624 }
 625
 626 static long
 627 GetSizeMultiplier(char type)
 628 {
 629     switch (type) {
 630     case 'G': case 'g': return 1024*1024*1024;
 631     case 'M': case 'm': return 1024*1024;
 632     case 'K': case 'k': return 1024;
 633     case 'B': case 'b': return 1;
 634     default: return 0;
 635     }
 636 }
 637
 638 unsigned long
 639 ParseVolume(const char *volume)
 640 {
 641     unsigned long accum = 0, partial = 0;
 642     char c;
 643     while ((c = *volume++)) {
 644         if (isdigit((int)c)) {
 645             partial = partial*10 + c - '0';
 646         } else {
 647             accum += GetSizeMultiplier(c) * partial;
 648             partial = 0;
 649         }
 650     }
 651     return accum + partial;
 652 }
 653
 654 int
 655 parse_ipmask(const char *str, struct in_addr *addr, unsigned long *mask)
 656 {
 657     int accum, pos;
 658     unsigned long t_a, t_m;
 659
 660     t_a = t_m = pos = 0;
 661     if (addr)
 662         addr->s_addr = htonl(t_a);
 663     if (mask)
 664         *mask = t_m;
 665     while (*str) {
 666         if (!isdigit(*str))
 667             return 0;
 668         accum = 0;
 669         do {
 670             accum = (accum * 10) + *str++ - '0';
 671         } while (isdigit(*str));
 672         if (accum > 255)
 673             return 0;
 674         t_a = (t_a << 8) | accum;
 675         t_m = (t_m << 8) | 255;
 676         pos += 8;
 677         if (*str == '.') {
 678             str++;
 679             while (*str == '*') {
 680                 str++;
 681                 if (*str == '.') {
 682                     t_a <<= 8;
 683                     t_m <<= 8;
 684                     pos += 8;
 685                     str++;
 686                 } else if (*str == 0) {
 687                     t_a <<= 32 - pos;
 688                     t_m <<= 32 - pos;
 689                     pos = 32;
 690                     goto out;
 691                 } else
 692                     return 0;
 693             }
 694         } else if (*str == '/') {
 695             int start = pos;
 696             accum = 0;
 697             do {
 698                 accum = (accum * 10) + *str++ - '0';
 699             } while (isdigit(*str));
 700             while (pos < start+accum && pos < 32) {
 701                 t_a = (t_a << 1) | 0;
 702                 t_m = (t_m << 1) | 1;
 703                 pos++;
 704             }
 705             if (pos != start+accum)
 706                 return 0;
 707         } else if (*str == 0)
 708             break;
 709         else
 710             return 0;
 711     }
 712 out:
 713     if (pos != 32)
 714         return 0;
 715     if (addr)
 716         addr->s_addr = htonl(t_a);
 717     if (mask)
 718         *mask = t_m;
 719     return 1;
 720 }
 721
 722 char *
 723 unsplit_string(char *set[], unsigned int max, char *dest)
 724 {
 725     static char unsplit_buffer[MAXLEN*2];
 726     unsigned int ii, jj, pos;
 727
 728     if (!dest)
 729         dest = unsplit_buffer;
 730     for (ii=pos=0; ii<max; ii++) {
 731         for (jj=0; set[ii][jj]; jj++)
 732             dest[pos++] = set[ii][jj];
 733         dest[pos++] = ' ';
 734     }
 735     dest[--pos] = 0;
 736     return dest;
 737 }
 738
 739 char *
 740 intervalString(char *output, time_t interval, struct handle_info *hi)
 741 {
 742     static const struct {
 743         const char *msg_single;
 744         const char *msg_plural;
 745         long length;
 746     } unit[] = {
 747         { "MSG_YEAR",   "MSG_YEARS", 365 * 24 * 60 * 60 },
 748         { "MSG_WEEK",   "MSG_WEEKS",   7 * 24 * 60 * 60 },
 749         { "MSG_DAY",    "MSG_DAYS",        24 * 60 * 60 },
 750         { "MSG_HOUR",   "MSG_HOURS",            60 * 60 },
 751         { "MSG_MINUTE", "MSG_MINUTES",               60 },
 752         { "MSG_SECOND", "MSG_SECONDS",                1 }
 753     };
 754     struct language *lang;
 755     const char *msg;
 756     unsigned int type, words, pos, count;
 757
 758     lang = hi ? hi->language : lang_C;
 759     if(!interval)
 760     {
 761         msg = language_find_message(lang, "MSG_0_SECONDS");
 762         return strcpy(output, msg);
 763     }
 764
 765     for (type = 0, words = pos = 0;
 766          interval && (words < 2) && (type < ArrayLength(unit));
 767          type++) {
 768         if (interval < unit[type].length)
 769             continue;
 770         count = interval / unit[type].length;
 771         interval = interval % unit[type].length;
 772
 773         if (words++ == 1) {
 774             msg = language_find_message(lang, "MSG_AND");
 775             pos += sprintf(output + pos, "%s ", msg);
 776         }
 777         if (count == 1)
 778             msg = language_find_message(lang, unit[type].msg_single);
 779         else
 780             msg = language_find_message(lang, unit[type].msg_plural);
 781         pos += sprintf(output + pos, "%d%s", count, msg);
 782     }
 783
 784     output[pos] = 0;
 785     return output;
 786 }
 787
 788 int
 789 getipbyname(const char *name, unsigned long *ip)
 790 {
 791     struct hostent *he = gethostbyname(name);
 792     if (!he)
 793         return 0;
 794     if (he->h_addrtype != AF_INET)
 795         return 0;
 796     memcpy(ip, he->h_addr_list[0], sizeof(*ip));
 797     return 1;
 798 }
 799
 800 DEFINE_LIST(string_buffer, char)
 801
 802 void
 803 string_buffer_append_substring(struct string_buffer *buf, const char *tail, unsigned int len)
 804 {
 805     while (buf->used + len >= buf->size) {
 806         if (!buf->size)
 807             buf->size = 16;
 808         else
 809             buf->size <<= 1;
 810         buf->list = realloc(buf->list, buf->size*sizeof(buf->list[0]));
 811     }
 812     memcpy(buf->list + buf->used, tail, len+1);
 813     buf->used += len;
 814 }
 815
 816 void
 817 string_buffer_append_string(struct string_buffer *buf, const char *tail)
 818 {
 819     string_buffer_append_substring(buf, tail, strlen(tail));
 820 }
 821
 822 void
 823 string_buffer_append_vprintf(struct string_buffer *buf, const char *fmt, va_list args)
 824 {
 825     va_list working;
 826     unsigned int len;
 827     int ret;
 828
 829     VA_COPY(working, args);
 830     len = strlen(fmt);
 831     if (!buf->list || ((buf->used + buf->size) < len)) {
 832         buf->size = buf->used + len;
 833         buf->list = realloc(buf->list, buf->size);
 834     }
 835     ret = vsnprintf(buf->list + buf->used, buf->size - buf->used, fmt, working);
 836     if (ret <= 0) {
 837         /* pre-C99 behavior; double buffer size until it is big enough */
 838         va_end(working);
 839         VA_COPY(working, args);
 840         while ((ret = vsnprintf(buf->list + buf->used, buf->size - buf->used, fmt, working)) <= 0) {
 841             buf->size += len;
 842             buf->list = realloc(buf->list, buf->size);
 843             va_end(working);
 844             VA_COPY(working, args);
 845         }
 846         buf->used += ret;
 847     } else if (buf->used + ret < buf->size) {
 848         /* no need to increase allocation size */
 849         buf->used += ret;
 850     } else {
 851         /* now we know exactly how much space we need */
 852         if (buf->size <= buf->used + ret) {
 853             buf->size = buf->used + ret + 1;
 854             buf->list = realloc(buf->list, buf->size);
 855         }
 856         va_end(working);
 857         VA_COPY(working, args);
 858         buf->used += vsnprintf(buf->list + buf->used, buf->size, fmt, working);
 859     }
 860     va_end(working);
 861     va_end(args);
 862 }
 863
 864 void string_buffer_append_printf(struct string_buffer *buf, const char *fmt, ...)
 865 {
 866     va_list args;
 867     va_start(args, fmt);
 868     string_buffer_append_vprintf(buf, fmt, args);
 869 }
 870
 871 void
 872 string_buffer_replace(struct string_buffer *buf, unsigned int from, unsigned int len, const char *repl)
 873 {
 874     unsigned int repl_len = strlen(repl);
 875     if (from > buf->used)
 876         return;
 877     if (len + from > buf->used)
 878         len = buf->used - from;
 879     buf->used = buf->used + repl_len - len;
 880     if (buf->size <= buf->used) {
 881         while (buf->used >= buf->size)
 882             buf->size <<= 1;
 883         buf->list = realloc(buf->list, buf->size*sizeof(buf->list[0]));
 884     }
 885     memmove(buf->list+from+repl_len, buf->list+from+len, strlen(buf->list+from+len));
 886     strcpy(buf->list+from, repl);
 887 }
 888
 889 struct string_list str_tab;
 890
 891 const char *
 892 strtab(unsigned int ii) {
 893     if (ii > 65536)
 894         return NULL;
 895     if (ii > str_tab.size) {
 896         unsigned int old_size = str_tab.size;
 897         while (ii >= str_tab.size)
 898             str_tab.size <<= 1;
 899         str_tab.list = realloc(str_tab.list, str_tab.size*sizeof(str_tab.list[0]));
 900         memset(str_tab.list+old_size, 0, (str_tab.size-old_size)*sizeof(str_tab.list[0]));
 901     }
 902     if (!str_tab.list[ii]) {
 903         str_tab.list[ii] = malloc(12);
 904         sprintf(str_tab.list[ii], "%u", ii);
 905     }
 906     return str_tab.list[ii];
 907 }
 908
 909 void
 910 tools_init(void)
 911 {
 912     unsigned int upr, lwr;
 913     for (lwr=0; lwr<256; ++lwr)
 914         tolower(lwr) = lwr;
 915     for (upr='A', lwr='a'; lwr <= 'z'; ++upr, ++lwr)
 916         tolower(upr) = lwr;
 917 #ifdef WITH_PROTOCOL_P10
 918     for (upr='[', lwr='{'; lwr <= '~'; ++upr, ++lwr)
 919         tolower(upr) = lwr;
 920     for (upr=0xc0, lwr=0xe0; lwr <= 0xf6; ++upr, ++lwr)
 921         tolower(upr) = lwr;
 922     for (upr=0xd8, lwr=0xf8; lwr <= 0xfe; ++upr, ++lwr)
 923         tolower(upr) = lwr;
 924 #endif
 925     str_tab.size = 1001;
 926     str_tab.list = calloc(str_tab.size, sizeof(str_tab.list[0]));
 927 }
 928
 929 void
 930 tools_cleanup(void)
 931 {
 932     unsigned int ii;
 933     for (ii=0; ii<str_tab.size; ++ii)
 934         free(str_tab.list[ii]);
 935     free(str_tab.list);
 936 }
 937
 938 /* mysep() is my answer to the strtok/strsep
 939  * issue. strsep is nice but doesn't skip
 940  * multiple dilimiters, which can really
 941  * offset tokens and cause huge corruption
 942  * so this function will use strsep but
 943  * act like strtok in that sense.
 944  */
 945 char *mysep(char **sepstr, char *delim)
 946 {
 947   static char *retstr;
 948
 949   if(!*sepstr || !**sepstr)
 950     return(NULL);
 951
 952   do
 953   {
 954       retstr = strsep(sepstr, delim);
 955   }while (retstr && !(*retstr));
 956
 957   return(retstr);
 958 }
 959
 960 char *time2str(time_t thetime)
 961 {
 962     char *buf, *tmp;
 963
 964     buf = ctime(&thetime);
 965     tmp = (char *)strchr(buf, '\n');
 966     *tmp = '\0';
 967     return(buf);
 968 }
 969