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     unsigned int star_p, q_cnt;
 249     while (1) {
 250         switch (*glob) {
 251         case 0:
 252             return !*text;
 253         case '\\':
 254             glob++;
 255             /* intentionally not tolower(...) so people can force
 256              * capitalization, or we can overload \ in the future */
 257             if (*text++ != *glob++)
 258                 return 0;
 259             break;
 260         case '*':
 261         case '?':
 262             star_p = q_cnt = 0;
 263             do {
 264                 if (*glob == '*')
 265                     star_p = 1;
 266                 else if (*glob == '?')
 267                     q_cnt++;
 268                 else
 269                     break;
 270                 glob++;
 271             } while (1);
 272             while (q_cnt) {
 273                 if (!*text++)
 274                     return 0;
 275                 q_cnt--;
 276             }
 277             if (star_p) {
 278                 /* if this is the last glob character, it will match any text */
 279                 if (!*glob)
 280                     return 1;
 281                 /* Thanks to the loop above, we know that the next
 282                  * character is a normal character.  So just look for
 283                  * the right character.
 284                  */
 285                 for (; *text; text++) {
 286                     if ((tolower(*text) == tolower(*glob))
 287                         && match_ircglob(text+1, glob+1)) {
 288                         return 1;
 289                     }
 290                 }
 291                 return 0;
 292             }
 293             /* if !star_p, fall through to normal character case,
 294              * first checking to see if ?s carried us to the end */
 295             if (!*glob && !*text)
 296                 return 1;
 297         default:
 298             if (!*text)
 299                 return 0;
 300             while (*text && *glob && *glob != '*' && *glob != '?' && *glob != '\\') {
 301                 if (tolower(*text++) != tolower(*glob++))
 302                     return 0;
 303             }
 304         }
 305     }
 306 }
 307
 308 extern const char *hidden_host_suffix;
 309
 310 int user_matches_glob(struct userNode *user, const char *orig_glob, int include_nick)
 311 {
 312     /* A new glob function, the old one had many false positives.
 313      * look at IsSetHost(user) etc and include_nick, build a nick!user@host string
 314      * from user and save it in a variable. Compare with match_ircglob() and
 315      * return the results. Match any of the possible user@host combos (ugh) -Rubin
 316      */
 317     char *matchstr_user;
 318     char *matchstr_host;
 319     char *matchstr_full = NULL;
 320
 321     if(IsSetHost(user))   /* S: line sethosts */
 322     {
 323         /* Grab host and user from sethost instead of real host */
 324         char *buff;
 325         buff = alloca(strlen(user->sethost) + 1);
 326         strcpy(buff, user->sethost);
 327         matchstr_user = mysep(&buff, "@");
 328         matchstr_host = mysep(&buff, "@");
 329
 330         matchstr_full = alloca(strlen(user->nick) + strlen(matchstr_user) + strlen(matchstr_host) + 4);
 331         if(include_nick)
 332             sprintf(matchstr_full, "%s!%s@%s", user->nick, matchstr_user, matchstr_host);
 333         else
 334             sprintf(matchstr_full, "%s@%s", matchstr_user, matchstr_host);
 335         if(match_ircglob(matchstr_full, orig_glob))
 336             return(1);
 337     }
 338     else if(IsFakeHost(user))  /* Fakehost */
 339     {
 340         matchstr_full = alloca(strlen(user->nick) + strlen(user->ident) + strlen(user->fakehost) + 4);
 341         if(include_nick)
 342             sprintf(matchstr_full, "%s!%s@%s", user->nick, user->ident, user->fakehost);
 343         else
 344             sprintf(matchstr_full, "%s@%s", user->ident, user->fakehost);
 345         if(match_ircglob(matchstr_full, orig_glob))
 346             return(1);
 347     }
 348     else if(hidden_host_suffix && user->handle_info)  /* name.users.network.org  host */
 349     {
 350         matchstr_host = alloca(strlen(user->handle_info->handle) + strlen(hidden_host_suffix) + 2);
 351         sprintf(matchstr_host, "%s.%s", user->handle_info->handle, hidden_host_suffix);
 352         matchstr_user = user->ident;
 353
 354         matchstr_full = alloca(strlen(user->nick) + strlen(user->ident) + strlen(matchstr_host) + 4);
 355         if(include_nick)
 356             sprintf(matchstr_full, "%s!%s@%s", user->nick, user->ident, matchstr_host);
 357         else
 358             sprintf(matchstr_full, "%s@%s", user->ident, matchstr_host);
 359         if(match_ircglob(matchstr_full, orig_glob))
 360             return(1);
 361     }
 362
 363     /* Check normal hostname */
 364     matchstr_full = alloca(strlen(user->nick) + strlen(user->ident) + strlen(user->hostname) + 4);
 365     if(include_nick)
 366         sprintf(matchstr_full, "%s!%s@%s", user->nick, user->ident, user->hostname);
 367     else
 368         sprintf(matchstr_full, "%s@%s", user->ident, user->hostname);
 369     if(match_ircglob(matchstr_full, orig_glob))
 370             return(1);
 371
 372     /* Check IP hostname (could skip this if same as above?)*/
 373     matchstr_host = inet_ntoa(user->ip);
 374     matchstr_full = alloca(strlen(user->nick) + strlen(user->ident) + strlen(matchstr_host) + 4);
 375     if(include_nick)
 376         sprintf(matchstr_full, "%s!%s@%s", user->nick, user->ident, matchstr_host);
 377     else
 378         sprintf(matchstr_full, "%s@%s", user->ident, matchstr_host);
 379     if(match_ircglob(matchstr_full, orig_glob))
 380             return(1);
 381
 382     return(0); /* Didnt match anything */
 383 }
 384
 385 int
 386 user_matches_glob_broken(struct userNode *user, const char *orig_glob, int include_nick)
 387 {
 388     char *glob, *marker;
 389     char *setident = NULL, *sethostname = NULL; // sethost - reed/apples
 390
 391     /* Make a writable copy of the glob */
 392     glob = alloca(strlen(orig_glob)+1);
 393     strcpy(glob, orig_glob);
 394     /* Check the nick, if it's present */
 395     if (include_nick) {
 396         if (!(marker = strchr(glob, '!'))) {
 397             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);
 398             return 0;
 399         }
 400         *marker = 0;
 401         if (!match_ircglob(user->nick, glob)) return 0;
 402         glob = marker + 1;
 403     }
 404     /* Check the ident */
 405     if (!(marker = strchr(glob, '@'))) {
 406         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);
 407         return 0;
 408     }
 409     *marker = 0;
 410
 411     // sethost - reed/apples
 412     if (IsSetHost(user)) {
 413       setident = alloca(strcspn(user->sethost, "@")+2);
 414       safestrncpy(setident, user->sethost, strcspn(user->sethost, "@")+1);
 415       sethostname = strchr(user->sethost, '@') + 1;
 416     }
 417
 418     if (!match_ircglob(user->ident, glob) && (IsSetHost(user) && !match_ircglob(setident, glob)))
 419         return 0;
 420     glob = marker + 1;
 421     /* If it might be an IP glob, test that. */
 422     if (!glob[strspn(glob, "0123456789./*?")]
 423         && match_ircglob(inet_ntoa(user->ip), glob))
 424         return 1;
 425     /* Check for a fakehost match. */
 426     if (IsFakeHost(user) && match_ircglob(user->fakehost, glob))
 427         return 1;
 428     if (IsSetHost(user) && match_ircglob(sethostname, glob))
 429         return 1;
 430     /* Check for an account match. */
 431     if (hidden_host_suffix && user->handle_info) {
 432         char hidden_host[HOSTLEN+1];
 433         snprintf(hidden_host, sizeof(hidden_host), "%s.%s", user->handle_info->handle, hidden_host_suffix);
 434         if (match_ircglob(hidden_host, glob))
 435             return 1;
 436     }
 437     /* None of the above; could only be a hostname match. */
 438     return match_ircglob(user->hostname, glob);
 439 }
 440
 441 int
 442 is_ircmask(const char *text)
 443 {
 444     while (*text && (isalnum((char)*text) || strchr("-_[]|\\`^{}?*", *text)))
 445         text++;
 446     if (*text++ != '!')
 447         return 0;
 448     while (*text && *text != '@' && !isspace((char)*text))
 449         text++;
 450     if (*text++ != '@')
 451         return 0;
 452     while (*text && !isspace((char)*text))
 453         text++;
 454     return !*text;
 455 }
 456
 457 int
 458 is_gline(const char *text)
 459 {
 460     if (*text == '@')
 461         return 0;
 462     text += strcspn(text, "@!% \t\r\n");
 463     if (*text++ != '@')
 464         return 0;
 465     if (!*text)
 466         return 0;
 467     while (*text && (isalnum((char)*text) || strchr(".-?*:", *text)))
 468         text++;
 469     return !*text;
 470 }
 471
 472 int
 473 split_ircmask(char *text, char **nick, char **ident, char **host)
 474 {
 475     char *start;
 476
 477     start = text;
 478     while (isalnum((char)*text) || strchr("=[]\\`^{}?*", *text))
 479         text++;
 480     if (*text != '!' || ((text - start) > NICKLEN))
 481         return 0;
 482     *text = 0;
 483     if (nick)
 484         *nick = start;
 485
 486     start = ++text;
 487     while (*text && *text != '@' && !isspace((char)*text))
 488         text++;
 489     if (*text != '@' || ((text - start) > USERLEN))
 490         return 0;
 491     *text = 0;
 492     if (ident)
 493         *ident = start;
 494
 495     start = ++text;
 496     while (*text && (isalnum((char)*text) || strchr(".-?*:", *text)))
 497         text++;
 498     if (host)
 499         *host = start;
 500     return !*text && ((text - start) <= HOSTLEN) && nick && ident && host;
 501 }
 502
 503 char *
 504 sanitize_ircmask(char *input)
 505 {
 506     unsigned int length, flag;
 507     char *mask, *start, *output;
 508
 509     /* Sanitize everything in place; input *must* be a valid
 510        hostmask. */
 511     output = input;
 512     flag = 0;
 513
 514     /* The nick is truncated at the end. */
 515     length = 0;
 516     mask = input;
 517     while(*input++ != '!')
 518     {
 519         length++;
 520     }
 521     if(length > NICKLEN)
 522     {
 523         mask += NICKLEN;
 524         *mask++ = '!';
 525
 526         /* This flag is used to indicate following parts should
 527            be shifted. */
 528         flag = 1;
 529     }
 530     else
 531     {
 532         mask = input;
 533     }
 534
 535     /* The ident and host must be truncated at the beginning and
 536        replaced with a '*' to be compatible with ircu. */
 537     length = 0;
 538     start = input;
 539     while(*input++ != '@')
 540     {
 541         length++;
 542     }
 543     if(length > USERLEN || flag)
 544     {
 545         if(length > USERLEN)
 546         {
 547             start = input - USERLEN;
 548             *mask++ = '*';
 549         }
 550         while(*start != '@')
 551         {
 552             *mask++ = *start++;
 553         }
 554         *mask++ = '@';
 555
 556         flag = 1;
 557     }
 558     else
 559     {
 560         mask = input;
 561     }
 562
 563     length = 0;
 564     start = input;
 565     while(*input++)
 566     {
 567         length++;
 568     }
 569     if(length > HOSTLEN || flag)
 570     {
 571         if(length > HOSTLEN)
 572         {
 573             start = input - HOSTLEN;
 574             *mask++ = '*';
 575         }
 576         while(*start)
 577         {
 578             *mask++ = *start++;
 579         }
 580         *mask = '\0';
 581     }
 582
 583     return output;
 584 }
 585
 586 static long
 587 TypeLength(char type)
 588 {
 589     switch (type) {
 590     case 'y': return 365*24*60*60;
 591     case 'M': return 31*24*60*60;
 592     case 'w': return 7*24*60*60;
 593     case 'd': return 24*60*60;
 594     case 'h': return 60*60;
 595     case 'm': return 60;
 596     case 's': return 1;
 597     default: return 0;
 598     }
 599 }
 600
 601 unsigned long
 602 ParseInterval(const char *interval)
 603 {
 604     unsigned long seconds = 0;
 605     int partial = 0;
 606     char c;
 607
 608     /* process the string, resetting the count if we find a unit character */
 609     while ((c = *interval++)) {
 610         if (isdigit((int)c)) {
 611             partial = partial*10 + c - '0';
 612         } else {
 613             seconds += TypeLength(c) * partial;
 614             partial = 0;
 615         }
 616     }
 617     /* assume the last chunk is seconds (the normal case) */
 618     return seconds + partial;
 619 }
 620
 621 static long
 622 GetSizeMultiplier(char type)
 623 {
 624     switch (type) {
 625     case 'G': case 'g': return 1024*1024*1024;
 626     case 'M': case 'm': return 1024*1024;
 627     case 'K': case 'k': return 1024;
 628     case 'B': case 'b': return 1;
 629     default: return 0;
 630     }
 631 }
 632
 633 unsigned long
 634 ParseVolume(const char *volume)
 635 {
 636     unsigned long accum = 0, partial = 0;
 637     char c;
 638     while ((c = *volume++)) {
 639         if (isdigit((int)c)) {
 640             partial = partial*10 + c - '0';
 641         } else {
 642             accum += GetSizeMultiplier(c) * partial;
 643             partial = 0;
 644         }
 645     }
 646     return accum + partial;
 647 }
 648
 649 int
 650 parse_ipmask(const char *str, struct in_addr *addr, unsigned long *mask)
 651 {
 652     int accum, pos;
 653     unsigned long t_a, t_m;
 654
 655     t_a = t_m = pos = 0;
 656     if (addr)
 657         addr->s_addr = htonl(t_a);
 658     if (mask)
 659         *mask = t_m;
 660     while (*str) {
 661         if (!isdigit(*str))
 662             return 0;
 663         accum = 0;
 664         do {
 665             accum = (accum * 10) + *str++ - '0';
 666         } while (isdigit(*str));
 667         if (accum > 255)
 668             return 0;
 669         t_a = (t_a << 8) | accum;
 670         t_m = (t_m << 8) | 255;
 671         pos += 8;
 672         if (*str == '.') {
 673             str++;
 674             while (*str == '*') {
 675                 str++;
 676                 if (*str == '.') {
 677                     t_a <<= 8;
 678                     t_m <<= 8;
 679                     pos += 8;
 680                     str++;
 681                 } else if (*str == 0) {
 682                     t_a <<= 32 - pos;
 683                     t_m <<= 32 - pos;
 684                     pos = 32;
 685                     goto out;
 686                 } else
 687                     return 0;
 688             }
 689         } else if (*str == '/') {
 690             int start = pos;
 691             accum = 0;
 692             do {
 693                 accum = (accum * 10) + *str++ - '0';
 694             } while (isdigit(*str));
 695             while (pos < start+accum && pos < 32) {
 696                 t_a = (t_a << 1) | 0;
 697                 t_m = (t_m << 1) | 1;
 698                 pos++;
 699             }
 700             if (pos != start+accum)
 701                 return 0;
 702         } else if (*str == 0)
 703             break;
 704         else
 705             return 0;
 706     }
 707 out:
 708     if (pos != 32)
 709         return 0;
 710     if (addr)
 711         addr->s_addr = htonl(t_a);
 712     if (mask)
 713         *mask = t_m;
 714     return 1;
 715 }
 716
 717 char *
 718 unsplit_string(char *set[], unsigned int max, char *dest)
 719 {
 720     static char unsplit_buffer[MAXLEN*2];
 721     unsigned int ii, jj, pos;
 722
 723     if (!dest)
 724         dest = unsplit_buffer;
 725     for (ii=pos=0; ii<max; ii++) {
 726         for (jj=0; set[ii][jj]; jj++)
 727             dest[pos++] = set[ii][jj];
 728         dest[pos++] = ' ';
 729     }
 730     dest[--pos] = 0;
 731     return dest;
 732 }
 733
 734 char *
 735 intervalString(char *output, time_t interval, struct handle_info *hi)
 736 {
 737     static const struct {
 738         const char *msg_single;
 739         const char *msg_plural;
 740         long length;
 741     } unit[] = {
 742         { "MSG_YEAR",   "MSG_YEARS", 365 * 24 * 60 * 60 },
 743         { "MSG_WEEK",   "MSG_WEEKS",   7 * 24 * 60 * 60 },
 744         { "MSG_DAY",    "MSG_DAYS",        24 * 60 * 60 },
 745         { "MSG_HOUR",   "MSG_HOURS",            60 * 60 },
 746         { "MSG_MINUTE", "MSG_MINUTES",               60 },
 747         { "MSG_SECOND", "MSG_SECONDS",                1 }
 748     };
 749     struct language *lang;
 750     const char *msg;
 751     unsigned int type, words, pos, count;
 752
 753     lang = hi ? hi->language : lang_C;
 754     if(!interval)
 755     {
 756         msg = language_find_message(lang, "MSG_0_SECONDS");
 757         return strcpy(output, msg);
 758     }
 759
 760     for (type = 0, words = pos = 0;
 761          interval && (words < 2) && (type < ArrayLength(unit));
 762          type++) {
 763         if (interval < unit[type].length)
 764             continue;
 765         count = interval / unit[type].length;
 766         interval = interval % unit[type].length;
 767
 768         if (words++ == 1) {
 769             msg = language_find_message(lang, "MSG_AND");
 770             pos += sprintf(output + pos, "%s ", msg);
 771         }
 772         if (count == 1)
 773             msg = language_find_message(lang, unit[type].msg_single);
 774         else
 775             msg = language_find_message(lang, unit[type].msg_plural);
 776         pos += sprintf(output + pos, "%d%s", count, msg);
 777     }
 778
 779     output[pos] = 0;
 780     return output;
 781 }
 782
 783 int
 784 getipbyname(const char *name, unsigned long *ip)
 785 {
 786     struct hostent *he = gethostbyname(name);
 787     if (!he)
 788         return 0;
 789     if (he->h_addrtype != AF_INET)
 790         return 0;
 791     memcpy(ip, he->h_addr_list[0], sizeof(*ip));
 792     return 1;
 793 }
 794
 795 DEFINE_LIST(string_buffer, char)
 796
 797 void
 798 string_buffer_append_substring(struct string_buffer *buf, const char *tail, unsigned int len)
 799 {
 800     while (buf->used + len >= buf->size) {
 801         if (!buf->size)
 802             buf->size = 16;
 803         else
 804             buf->size <<= 1;
 805         buf->list = realloc(buf->list, buf->size*sizeof(buf->list[0]));
 806     }
 807     memcpy(buf->list + buf->used, tail, len+1);
 808     buf->used += len;
 809 }
 810
 811 void
 812 string_buffer_append_string(struct string_buffer *buf, const char *tail)
 813 {
 814     string_buffer_append_substring(buf, tail, strlen(tail));
 815 }
 816
 817 void
 818 string_buffer_append_vprintf(struct string_buffer *buf, const char *fmt, va_list args)
 819 {
 820     va_list working;
 821     unsigned int len;
 822     int ret;
 823
 824     VA_COPY(working, args);
 825     len = strlen(fmt);
 826     if (!buf->list || ((buf->used + buf->size) < len)) {
 827         buf->size = buf->used + len;
 828         buf->list = realloc(buf->list, buf->size);
 829     }
 830     ret = vsnprintf(buf->list + buf->used, buf->size - buf->used, fmt, working);
 831     if (ret <= 0) {
 832         /* pre-C99 behavior; double buffer size until it is big enough */
 833         va_end(working);
 834         VA_COPY(working, args);
 835         while ((ret = vsnprintf(buf->list + buf->used, buf->size - buf->used, fmt, working)) <= 0) {
 836             buf->size += len;
 837             buf->list = realloc(buf->list, buf->size);
 838             va_end(working);
 839             VA_COPY(working, args);
 840         }
 841         buf->used += ret;
 842     } else if (buf->used + ret < buf->size) {
 843         /* no need to increase allocation size */
 844         buf->used += ret;
 845     } else {
 846         /* now we know exactly how much space we need */
 847         if (buf->size <= buf->used + ret) {
 848             buf->size = buf->used + ret + 1;
 849             buf->list = realloc(buf->list, buf->size);
 850         }
 851         va_end(working);
 852         VA_COPY(working, args);
 853         buf->used += vsnprintf(buf->list + buf->used, buf->size, fmt, working);
 854     }
 855     va_end(working);
 856     va_end(args);
 857 }
 858
 859 void string_buffer_append_printf(struct string_buffer *buf, const char *fmt, ...)
 860 {
 861     va_list args;
 862     va_start(args, fmt);
 863     string_buffer_append_vprintf(buf, fmt, args);
 864 }
 865
 866 void
 867 string_buffer_replace(struct string_buffer *buf, unsigned int from, unsigned int len, const char *repl)
 868 {
 869     unsigned int repl_len = strlen(repl);
 870     if (from > buf->used)
 871         return;
 872     if (len + from > buf->used)
 873         len = buf->used - from;
 874     buf->used = buf->used + repl_len - len;
 875     if (buf->size <= buf->used) {
 876         while (buf->used >= buf->size)
 877             buf->size <<= 1;
 878         buf->list = realloc(buf->list, buf->size*sizeof(buf->list[0]));
 879     }
 880     memmove(buf->list+from+repl_len, buf->list+from+len, strlen(buf->list+from+len));
 881     strcpy(buf->list+from, repl);
 882 }
 883
 884 struct string_list str_tab;
 885
 886 const char *
 887 strtab(unsigned int ii) {
 888     if (ii > 65536)
 889         return NULL;
 890     if (ii > str_tab.size) {
 891         unsigned int old_size = str_tab.size;
 892         while (ii >= str_tab.size)
 893             str_tab.size <<= 1;
 894         str_tab.list = realloc(str_tab.list, str_tab.size*sizeof(str_tab.list[0]));
 895         memset(str_tab.list+old_size, 0, (str_tab.size-old_size)*sizeof(str_tab.list[0]));
 896     }
 897     if (!str_tab.list[ii]) {
 898         str_tab.list[ii] = malloc(12);
 899         sprintf(str_tab.list[ii], "%u", ii);
 900     }
 901     return str_tab.list[ii];
 902 }
 903
 904 void
 905 tools_init(void)
 906 {
 907     unsigned int upr, lwr;
 908     for (lwr=0; lwr<256; ++lwr)
 909         tolower(lwr) = lwr;
 910     for (upr='A', lwr='a'; lwr <= 'z'; ++upr, ++lwr)
 911         tolower(upr) = lwr;
 912 #ifdef WITH_PROTOCOL_P10
 913     for (upr='[', lwr='{'; lwr <= '~'; ++upr, ++lwr)
 914         tolower(upr) = lwr;
 915     for (upr=0xc0, lwr=0xe0; lwr <= 0xf6; ++upr, ++lwr)
 916         tolower(upr) = lwr;
 917     for (upr=0xd8, lwr=0xf8; lwr <= 0xfe; ++upr, ++lwr)
 918         tolower(upr) = lwr;
 919 #endif
 920     str_tab.size = 1001;
 921     str_tab.list = calloc(str_tab.size, sizeof(str_tab.list[0]));
 922 }
 923
 924 void
 925 tools_cleanup(void)
 926 {
 927     unsigned int ii;
 928     for (ii=0; ii<str_tab.size; ++ii)
 929         free(str_tab.list[ii]);
 930     free(str_tab.list);
 931 }
 932
 933 /* mysep() is my answer to the strtok/strsep
 934  * issue. strsep is nice but doesn't skip
 935  * multiple dilimiters, which can really
 936  * offset tokens and cause huge corruption
 937  * so this function will use strsep but
 938  * act like strtok in that sence.
 939  */
 940 char *mysep(char **sepstr, char *delim)
 941 {
 942   static char *retstr;
 943
 944   if(!*sepstr || !**sepstr)
 945     return(NULL);
 946
 947   do
 948   {
 949       retstr = strsep(sepstr, delim);
 950   }while (retstr && !(*retstr));
 951
 952   return(retstr);
 953 }
 954
 955 char *time2str(time_t thetime)
 956 {
 957     char *buf, *tmp;
 958
 959     buf = ctime(&thetime);
 960     tmp = (char *)strchr(buf, '\n');
 961     *tmp = '\0';
 962     return(buf);
 963 }
 964