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  * x3 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 3 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 static const unsigned char ctype[256] = {
  61    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  62    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  63    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  64    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0,
  65    0,10,11,12,13,14,15, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  66    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  67    0,10,11,12,13,14,15, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  68 };
  69
  70 unsigned long int
  71 base64toint(const char* s, int count)
  72 {
  73     unsigned int i = 0;
  74     while (*s && count) {
  75         i = (i << NUMNICKLOG) + convert2n[(unsigned char)*s++];
  76         count--;
  77     }
  78     return i;
  79 }
  80
  81 const char* inttobase64(char* buf, unsigned int v, unsigned int count)
  82 {
  83   buf[count] = '\0';
  84   while (count > 0) {
  85       buf[--count] = convert2y[(unsigned char)(v & NUMNICKMASK)];
  86       v >>= NUMNICKLOG;
  87   }
  88   return buf;
  89 }
  90
  91 unsigned int
  92 irc_ntop(char *output, unsigned int out_size, const irc_in_addr_t *addr)
  93 {
  94     static const char hexdigits[] = "0123456789abcdef";
  95     unsigned int pos;
  96
  97     assert(output);
  98     assert(addr);
  99
 100     if (irc_in_addr_is_ipv4(*addr)) {
 101         unsigned int ip4;
 102
 103         ip4 = (ntohs(addr->in6[6]) << 16) | ntohs(addr->in6[7]);
 104         pos = snprintf(output, out_size, "%u.%u.%u.%u", (ip4 >> 24), (ip4 >> 16) & 255, (ip4 >> 8) & 255, ip4 & 255);
 105    } else {
 106         unsigned int part, max_start, max_zeros, curr_zeros, ii;
 107
 108         /* Find longest run of zeros. */
 109         for (max_start = max_zeros = curr_zeros = ii = 0; ii < 8; ++ii) {
 110             if (!addr->in6[ii])
 111                 curr_zeros++;
 112             else if (curr_zeros > max_zeros) {
 113                 max_start = ii - curr_zeros;
 114                 max_zeros = curr_zeros;
 115                 curr_zeros = 0;
 116             }
 117         }
 118         if (curr_zeros > max_zeros) {
 119             max_start = ii - curr_zeros;
 120             max_zeros = curr_zeros;
 121         }
 122
 123         /* Print out address. */
 124 #define APPEND(CH) do { if (pos < out_size) output[pos] = (CH); pos++; } while (0)
 125         for (pos = 0, ii = 0; ii < 8; ++ii) {
 126             if ((max_zeros > 0) && (ii == max_start)) {
 127                 if (ii == 0)
 128                     APPEND(':');
 129                 APPEND(':');
 130                 ii += max_zeros - 1;
 131                 continue;
 132             }
 133             part = ntohs(addr->in6[ii]);
 134             if (part >= 0x1000)
 135                 APPEND(hexdigits[part >> 12]);
 136             if (part >= 0x100)
 137                 APPEND(hexdigits[(part >> 8) & 15]);
 138             if (part >= 0x10)
 139                 APPEND(hexdigits[(part >> 4) & 15]);
 140             APPEND(hexdigits[part & 15]);
 141             if (ii < 7)
 142                 APPEND(':');
 143         }
 144 #undef APPEND
 145         output[pos < out_size ? pos : out_size - 1] = '\0';
 146     }
 147
 148     return pos;
 149 }
 150
 151 unsigned int
 152 irc_ntop_mask(char *output, unsigned int out_size, const irc_in_addr_t *addr, unsigned char bits)
 153 {
 154     char base_addr[IRC_NTOP_MAX_SIZE];
 155     int len;
 156
 157     if (bits >= 128)
 158         return irc_ntop(output, out_size, addr);
 159     if (!irc_ntop(base_addr, sizeof(base_addr), addr))
 160         return 0;
 161     len = snprintf(output, out_size, "%s/%d", base_addr, bits);
 162     if ((unsigned int)len >= out_size)
 163         return 0;
 164     return len;
 165 }
 166
 167 static unsigned int
 168 irc_pton_ip4(const char *input, unsigned char *pbits, uint32_t *output)
 169 {
 170     unsigned int dots = 0, pos = 0, part = 0, ip = 0, bits = 32;
 171
 172     /* Intentionally no support for bizarre IPv4 formats (plain
 173      * integers, octal or hex components) -- only vanilla dotted
 174      * decimal quads, optionally with trailing /nn.
 175      */
 176     if (input[0] == '.')
 177         return 0;
 178     while (1) switch (input[pos]) {
 179     default:
 180         if (dots < 3)
 181             return 0;
 182     out:
 183         ip |= part << (24 - 8 * dots++);
 184         *output = htonl(ip);
 185         if (pbits)
 186             *pbits = bits;
 187         return pos;
 188     case '.':
 189         if (input[++pos] == '.')
 190             return 0;
 191         ip |= part << (24 - 8 * dots++);
 192         part = 0;
 193         if (input[pos] == '*') {
 194             while (input[++pos] == '*') ;
 195             if (input[pos] != '\0')
 196                 return 0;
 197             if (pbits)
 198                 *pbits = dots * 8;
 199             *output = htonl(ip);
 200             return pos;
 201         }
 202         break;
 203     case '/':
 204         if (!pbits || !isdigit(input[pos + 1]))
 205             return 0;
 206         for (bits = 0; isdigit(input[++pos]); )
 207             bits = bits * 10 + input[pos] - '0';
 208         if (bits > 32)
 209             return 0;
 210         goto out;
 211     case '0': case '1': case '2': case '3': case '4':
 212     case '5': case '6': case '7': case '8': case '9':
 213         part = part * 10 + input[pos++] - '0';
 214         if (part > 255)
 215             return 0;
 216         break;
 217     }
 218 }
 219
 220 unsigned int
 221 irc_pton(irc_in_addr_t *addr, unsigned char *bits, const char *input)
 222 {
 223     const char *part_start = NULL;
 224     char *colon;
 225     char *dot;
 226     unsigned int part = 0, pos = 0, ii = 0, cpos = 8;
 227
 228     assert(input);
 229     memset(addr, 0, sizeof(*addr));
 230     colon = strchr(input, ':');
 231     dot = strchr(input, '.');
 232
 233     if (colon && (!dot || (dot > colon))) {
 234         /* Parse IPv6, possibly like ::127.0.0.1.
 235          * This is pretty straightforward; the only trick is borrowed
 236          * from Paul Vixie (BIND): when it sees a "::" continue as if
 237          * it were a single ":", but note where it happened, and fill
 238          * with zeros afterwards.
 239          */
 240         if (input[pos] == ':') {
 241             if ((input[pos+1] != ':') || (input[pos+2] == ':'))
 242                 return 0;
 243             cpos = 0;
 244             pos += 2;
 245             part_start = input + pos;
 246         }
 247         while (ii < 8) switch (input[pos]) {
 248         case '0': case '1': case '2': case '3': case '4':
 249         case '5': case '6': case '7': case '8': case '9':
 250         case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
 251         case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
 252             part = (part << 4) | (ctype[(unsigned char)input[pos++]] & 15);
 253             if (part > 0xffff)
 254                 return 0;
 255             break;
 256         case ':':
 257             part_start = input + ++pos;
 258             if (input[pos] == '.')
 259                 return 0;
 260             addr->in6[ii++] = htons(part);
 261             part = 0;
 262             if (input[pos] == ':') {
 263                 if (cpos < 8)
 264                     return 0;
 265                 cpos = ii;
 266             }
 267             break;
 268         case '.': {
 269             uint32_t ip4;
 270             unsigned int len;
 271             len = irc_pton_ip4(part_start, bits, &ip4);
 272             if (!len || (ii > 6))
 273                 return 0;
 274             memcpy(addr->in6 + ii, &ip4, sizeof(ip4));
 275             if (bits)
 276                 *bits += 96;
 277             ii += 2;
 278             pos = part_start + len - input;
 279             goto finish;
 280         }
 281         case '/':
 282             if (!bits || !isdigit(input[pos + 1]))
 283                 return 0;
 284             addr->in6[ii++] = htons(part);
 285             for (part = 0; isdigit(input[++pos]); )
 286                 part = part * 10 + input[pos] - '0';
 287             if (part > 128)
 288                 return 0;
 289             *bits = part;
 290             goto finish;
 291         case '*':
 292             while (input[++pos] == '*') ;
 293             if (input[pos] != '\0' || cpos < 8)
 294                 return 0;
 295             if (bits)
 296                 *bits = ii * 16;
 297             return pos;
 298         default:
 299             addr->in6[ii++] = htons(part);
 300             if (cpos == 8 && ii < 8)
 301                 return 0;
 302             if (bits)
 303                 *bits = 128;
 304             goto finish;
 305         }
 306     finish:
 307         /* Shift stuff after "::" up and fill middle with zeros. */
 308         if (cpos < 8) {
 309             unsigned int jj;
 310             for (jj = 0; jj < ii - cpos; jj++)
 311                 addr->in6[7 - jj] = addr->in6[ii - jj - 1];
 312             for (jj = 0; jj < 8 - ii; jj++)
 313                 addr->in6[cpos + jj] = 0;
 314         }
 315     } else if (dot) {
 316         uint32_t ip4;
 317         pos = irc_pton_ip4(input, bits, &ip4);
 318         if (pos) {
 319             addr->in6[5] = htons(65535);
 320             addr->in6[6] = htons(ntohl(ip4) >> 16);
 321             addr->in6[7] = htons(ntohl(ip4) & 65535);
 322             if (bits)
 323                 *bits += 96;
 324         }
 325     } else if (input[0] == '*') {
 326         while (input[++pos] == '*') ;
 327         if (input[pos] != '\0')
 328             return 0;
 329         if (bits)
 330             *bits = 0;
 331     }
 332     return pos;
 333 }
 334
 335 const char *irc_ntoa(const irc_in_addr_t *addr)
 336 {
 337     static char ntoa[IRC_NTOP_MAX_SIZE];
 338     irc_ntop(ntoa, sizeof(ntoa), addr);
 339     return ntoa;
 340 }
 341
 342 unsigned int
 343 irc_check_mask(const irc_in_addr_t *check, const irc_in_addr_t *mask, unsigned char bits)
 344 {
 345     unsigned int ii;
 346
 347     for (ii = 0; (ii < 8) && (bits > 16); bits -= 16, ++ii)
 348         if (check->in6[ii] != mask->in6[ii])
 349             return 0;
 350     if (ii < 8 && bits > 0
 351         && (ntohs(check->in6[ii] ^ mask->in6[ii]) >> (16 - bits)))
 352         return 0;
 353     return 1;
 354 }
 355
 356 static char irc_tolower[256];
 357 #undef tolower
 358 #define tolower(X) irc_tolower[(unsigned char)(X)]
 359
 360 void
 361 irc_strtolower(char *str) {
 362     char *p;
 363     for(p = str;*p;p++) {
 364        *p = tolower(*p);
 365     }
 366 }
 367
 368 int
 369 irccasecmp(const char *stra, const char *strb) {
 370     while (*stra && (tolower(*stra) == tolower(*strb)))
 371         stra++, strb++;
 372     return tolower(*stra) - tolower(*strb);
 373 }
 374
 375 int
 376 ircncasecmp(const char *stra, const char *strb, unsigned int len) {
 377     len--;
 378     while (*stra && (tolower(*stra) == tolower(*strb)) && len)
 379         stra++, strb++, len--;
 380     return tolower(*stra) - tolower(*strb);
 381 }
 382
 383 const char *
 384 irccasestr(const char *haystack, const char *needle) {
 385     unsigned int hay_len = strlen(haystack), needle_len = strlen(needle), pos;
 386     if (hay_len < needle_len)
 387         return NULL;
 388     for (pos=0; pos<hay_len+1-needle_len; ++pos) {
 389         if ((tolower(haystack[pos]) == tolower(*needle))
 390             && !ircncasecmp(haystack+pos, needle, needle_len))
 391             return haystack+pos;
 392     }
 393     return NULL;
 394 }
 395
 396 char *
 397 ircstrlower(char *str) {
 398     size_t ii;
 399     for (ii = 0; str[ii] != '\0'; ++ii)
 400         str[ii] = tolower(str[ii]);
 401     return str;
 402 }
 403
 404 int
 405 split_line(char *line, int irc_colon, int argv_size, char *argv[])
 406 {
 407     int argc = 0;
 408     int n;
 409     while (*line && (argc < argv_size)) {
 410         while (*line == ' ')
 411             *line++ = 0;
 412         if (*line == ':' && irc_colon && argc > 0) {
 413             /* the rest is a single parameter */
 414             argv[argc++] = line + 1;
 415             break;
 416         }
 417         if (!*line)
 418             break;
 419         argv[argc++] = line;
 420         if (argc >= argv_size)
 421             break;
 422         while (*line != ' ' && *line)
 423             line++;
 424     }
 425 #ifdef NDEBUG
 426     n = 0;
 427 #else
 428     for (n=argc; n<argv_size; n++)
 429         argv[n] = (char*)0xFEEDBEEF;
 430 #endif
 431     return argc;
 432 }
 433
 434 /* This is ircu's mmatch() function, from match.c. */
 435 int mmatch(const char *old_mask, const char *new_mask)
 436 {
 437   register const char *m = old_mask;
 438   register const char *n = new_mask;
 439   const char *ma = m;
 440   const char *na = n;
 441   int wild = 0;
 442   int mq = 0, nq = 0;
 443
 444   while (1)
 445   {
 446     if (*m == '*')
 447     {
 448       while (*m == '*')
 449         m++;
 450       wild = 1;
 451       ma = m;
 452       na = n;
 453     }
 454
 455     if (!*m)
 456     {
 457       if (!*n)
 458         return 0;
 459       for (m--; (m > old_mask) && (*m == '?'); m--)
 460         ;
 461       if ((*m == '*') && (m > old_mask) && (m[-1] != '\\'))
 462         return 0;
 463       if (!wild)
 464         return 1;
 465       m = ma;
 466
 467       /* Added to `mmatch' : Because '\?' and '\*' now is one character: */
 468       if ((*na == '\\') && ((na[1] == '*') || (na[1] == '?')))
 469         ++na;
 470
 471       n = ++na;
 472     }
 473     else if (!*n)
 474     {
 475       while (*m == '*')
 476         m++;
 477       return (*m != 0);
 478     }
 479     if ((*m == '\\') && ((m[1] == '*') || (m[1] == '?')))
 480     {
 481       m++;
 482       mq = 1;
 483     }
 484     else
 485       mq = 0;
 486
 487     /* Added to `mmatch' : Because '\?' and '\*' now is one character: */
 488     if ((*n == '\\') && ((n[1] == '*') || (n[1] == '?')))
 489     {
 490       n++;
 491       nq = 1;
 492     }
 493     else
 494       nq = 0;
 495
 496 /*
 497  * This `if' has been changed compared to match() to do the following:
 498  * Match when:
 499  *   old (m)         new (n)         boolean expression
 500  *    *               any             (*m == '*' && !mq) ||
 501  *    ?               any except '*'  (*m == '?' && !mq && (*n != '*' || nq)) ||
 502  * any except * or ?  same as m       (!((*m == '*' || *m == '?') && !mq) &&
 503  *                                      toLower(*m) == toLower(*n) &&
 504  *                                        !((mq && !nq) || (!mq && nq)))
 505  *
 506  * Here `any' also includes \* and \? !
 507  *
 508  * After reworking the boolean expressions, we get:
 509  * (Optimized to use boolean shortcircuits, with most frequently occuring
 510  *  cases upfront (which took 2 hours!)).
 511  */
 512     if ((*m == '*' && !mq) ||
 513         ((!mq || nq) && tolower(*m) == tolower(*n)) ||
 514         (*m == '?' && !mq && (*n != '*' || nq)))
 515     {
 516       if (*m)
 517         m++;
 518       if (*n)
 519         n++;
 520     }
 521     else
 522     {
 523       if (!wild)
 524         return 1;
 525       m = ma;
 526
 527       /* Added to `mmatch' : Because '\?' and '\*' now is one character: */
 528       if ((*na == '\\') && ((na[1] == '*') || (na[1] == '?')))
 529         ++na;
 530
 531       n = ++na;
 532     }
 533   }
 534 }
 535
 536 int
 537 match_ircglob(const char *text, const char *glob)
 538 {
 539     const char *m = glob, *n = text;
 540     const char *m_tmp = glob, *n_tmp = text;
 541     int star_p;
 542
 543     for (;;) switch (*m) {
 544     case '\0':
 545         if (!*n)
 546             return 1;
 547     backtrack:
 548         if (m_tmp == glob)
 549             return 0;
 550         m = m_tmp;
 551         n = ++n_tmp;
 552         if (!*n)
 553             return 0;
 554         break;
 555     case '\\':
 556         m++;
 557         /* allow escaping to force capitalization */
 558         if (*m++ != *n++)
 559             goto backtrack;
 560         break;
 561     case '*': case '?':
 562         for (star_p = 0; ; m++) {
 563             if (*m == '*')
 564                 star_p = 1;
 565             else if (*m == '?') {
 566                 if (!*n++)
 567                     goto backtrack;
 568             } else break;
 569         }
 570         if (star_p) {
 571             if (!*m)
 572                 return 1;
 573             else if (*m == '\\') {
 574                 m_tmp = ++m;
 575                 if (!*m)
 576                     return 0;
 577                 for (n_tmp = n; *n && *n != *m; n++) ;
 578             } else {
 579                 m_tmp = m;
 580                 for (n_tmp = n; *n && tolower(*n) != tolower(*m); n++) ;
 581             }
 582         }
 583         /* and fall through */
 584     default:
 585         if (!*n)
 586             return *m == '\0';
 587         if (tolower(*m) != tolower(*n))
 588             goto backtrack;
 589         m++;
 590         n++;
 591         break;
 592     }
 593 }
 594
 595 extern const char *hidden_host_suffix;
 596
 597 /* Prevent *@* *@** *@*a* type masks, while allowing anything else. This is the best way iv found to detect
 598  * a global matching mask; if it matches this string, it'll match almost anything :) */
 599 int is_overmask(char *mask)
 600 {
 601     return(match_ircglob("abcdefghijklmnopqrstuv!frcmbghilnrtoasde@apdic.yfa.dsfsdaffsdasfdasfd.abcdefghijklmnopqrstuvwxyz.asdfasfdfsdsfdasfda.ydfbe", mask));
 602 }
 603
 604 int
 605 user_matches_glob(struct userNode *user, const char *orig_glob, int flags)
 606 {
 607     char *tmpglob, *glob, *marker, *echannel, *emodes;
 608     char exttype = 0;
 609     int extreverse = 0, is_extended = 0, match = 0, banned = 0;
 610     unsigned int count, n;
 611     struct modeNode *mn;
 612
 613     /* Make a writable copy of the glob */
 614     glob = alloca(strlen(orig_glob)+1);
 615     strcpy(glob, orig_glob);
 616
 617     /* Extended bans */
 618     tmpglob = alloca(strlen(orig_glob)+1);
 619     tmpglob = strdup(orig_glob);
 620
 621     if (*tmpglob == '~') {
 622         tmpglob++; /* get rid of the ~ */
 623
 624         if (*tmpglob == '!') {
 625             extreverse = 1;
 626             tmpglob++; /* get rid of the ! */
 627         }
 628
 629         exttype = *tmpglob;
 630         tmpglob++; /* get rid of the type */
 631
 632         if (*tmpglob == ':') {
 633             is_extended = 1;
 634             tmpglob++; /* get rid of the : */
 635             glob = strdup(tmpglob);
 636         }
 637     }
 638
 639     if (is_extended) {
 640         log_module(MAIN_LOG, LOG_DEBUG, "Extended ban. T (%c) R (%d) M (%s)", exttype, extreverse, glob);
 641         switch (exttype) {
 642             case 'a':
 643                 if (user->handle_info) {
 644                     if (extreverse) {
 645                         if (0 != strcasecmp(glob, user->handle_info->handle))
 646                             return 1;
 647                     } else {
 648                         if (0 == strcasecmp(glob, user->handle_info->handle))
 649                             return 1;
 650                     }
 651                 } else {
 652                     if (extreverse)
 653                         return 1;
 654                 }
 655                 return match_ircglob(user->hostname, glob);
 656             case 'c':
 657                 if (!strstr(glob, "#"))
 658                     return 0;
 659
 660                 tmpglob = strdup(glob);
 661                 if (*glob != '#') {
 662                     echannel = strstr(glob, "#");
 663                     emodes = strtok(tmpglob, "#");
 664                 } else {
 665                     echannel = strdup(glob);
 666                     emodes = "";
 667                 }
 668
 669                 if (extreverse) {
 670                     for (n=count=0; n<user->channels.used; n++) {
 671                         mn = user->channels.list[n];
 672                         match = 0;
 673
 674                         if (0 == strcasecmp(echannel, mn->channel->name)) {
 675                             if (strlen(emodes) > 0) {
 676                                 if (mn->modes & MODE_CHANOP) {
 677                                     if (strstr(emodes, "@"))
 678                                         match = 1;
 679                                 }
 680                                 if (mn->modes & MODE_HALFOP) {
 681                                     if (strstr(emodes, "%"))
 682                                         match = 1;
 683                                 }
 684                                 if (mn->modes & MODE_VOICE) {
 685                                     if (strstr(emodes, "+"))
 686                                         match = 1;
 687                                 }
 688                             } else
 689                                 match = 1;
 690                         }
 691
 692                         if (match == 0)
 693                             banned = 1;
 694                         else {
 695                             banned = 0;
 696                             break;
 697                         }
 698                     }
 699                 } else {
 700                     for (n=count=0; n<user->channels.used; n++) {
 701                         mn = user->channels.list[n];
 702                         match = 0;
 703
 704                         if (0 == strcasecmp(echannel, mn->channel->name)) {
 705                             if (strlen(emodes) > 0) {
 706                                 if (mn->modes & MODE_CHANOP) {
 707                                     if (strstr(emodes, "@"))
 708                                         match = 1;
 709                                 }
 710                                 if (mn->modes & MODE_HALFOP) {
 711                                     if (strstr(emodes, "%"))
 712                                         match = 1;
 713                                 }
 714                                 if (mn->modes & MODE_VOICE) {
 715                                     if (strstr(emodes, "+"))
 716                                         match = 1;
 717                                 }
 718                             } else
 719                                 match = 1;
 720                         }
 721                         if (match == 1)
 722                             banned = 1;
 723                     }
 724                 }
 725
 726                 if (banned)
 727                     return 1;
 728                 else
 729                     return match_ircglob(user->hostname, glob);
 730             case 'n': /* this is handled ircd side */
 731                 return match_ircglob(user->hostname, glob);
 732             case 't': /* this is handled ircd side */
 733                 return match_ircglob(user->hostname, glob);
 734             default:
 735                 return 0;
 736         }
 737     }
 738
 739     /* Check the nick, if it's present */
 740     if (flags & MATCH_USENICK) {
 741         if (!(marker = strchr(glob, '!'))) {
 742             log_module(MAIN_LOG, LOG_ERROR, "user_matches_glob(\"%s\", \"%s\", %d) called, and glob doesn't include a '!'", user->nick, orig_glob, flags);
 743             return 0;
 744         }
 745         *marker = 0;
 746         if (!match_ircglob(user->nick, glob)) return 0;
 747         glob = marker + 1;
 748     }
 749     /* Check the ident */
 750     if (!(marker = strchr(glob, '@'))) {
 751         log_module(MAIN_LOG, LOG_ERROR, "user_matches_glob(\"%s\", \"%s\", %d) called, and glob doesn't include an '@'", user->nick, orig_glob, flags);
 752         return 0;
 753     }
 754     *marker = 0;
 755     if (!match_ircglob(user->ident, glob))
 756         return 0;
 757     glob = marker + 1;
 758     /* Check for a fakehost match. */
 759     if (IsFakeHost(user) && match_ircglob(user->fakehost, glob))
 760         return 1;
 761
 762     /* Check for a sethost (S:lines) */
 763     if (IsSetHost(user) && match_ircglob(user->sethost, glob))
 764         return 1;
 765
 766     /* Check for an account match. */
 767     if (hidden_host_suffix && user->handle_info) {
 768         char hidden_host[HOSTLEN+1];
 769         snprintf(hidden_host, sizeof(hidden_host), "%s.%s", user->handle_info->handle, hidden_host_suffix);
 770         if (match_ircglob(hidden_host, glob))
 771             return 1;
 772     }
 773
 774     /* Match crypt hostname */
 775     if (match_ircglob(user->crypthost, glob))
 776         return 1;
 777
 778     /* Match crypt IP */
 779     if (match_ircglob(user->cryptip, glob))
 780         return 1;
 781
 782     /* If only matching the visible hostnames, bail early. */
 783     if ((flags & MATCH_VISIBLE) && IsHiddenHost(user)
 784         && (IsFakeHost(user) || (hidden_host_suffix && user->handle_info)))
 785         return 0;
 786     /* If it might be an IP glob, test that. */
 787     if (!glob[strspn(glob, "0123456789./*?")]
 788         && match_ircglob(irc_ntoa(&user->ip), glob))
 789         return 1;
 790     /* None of the above; could only be a hostname match. */
 791     return match_ircglob(user->hostname, glob);
 792 }
 793
 794 int
 795 is_ircmask(const char *text)
 796 {
 797     char *tmptext;
 798
 799     if (*text == '~') {
 800         tmptext = alloca(strlen(text)+1);
 801         tmptext = strdup(text);
 802
 803         tmptext++; /* get rid of the ~ */
 804
 805         if (*tmptext == '!')
 806             tmptext++; /* get rid of the ! if it exists */
 807
 808         tmptext++; /* get rid of the ext ban type */
 809
 810         if (*tmptext == ':') {
 811             tmptext++; /* get rid of the : */
 812             while (*tmptext && !isspace((char)*tmptext))
 813                 tmptext++;  /* get rid of the rest */
 814             return !*tmptext;
 815         }
 816     }
 817
 818     while (*text && (isalnum((char)*text) || strchr("-_[]|\\`^{}?*", *text)))
 819         text++;
 820     if (*text++ != '!')
 821         return 0;
 822     while (*text && *text != '@' && !isspace((char)*text))
 823         text++;
 824     if (*text++ != '@')
 825         return 0;
 826     while (*text && !isspace((char)*text))
 827         text++;
 828     return !*text;
 829 }
 830
 831 int
 832 is_gline(const char *text)
 833 {
 834     if (*text == '@')
 835         return 0;
 836     text += strcspn(text, "@!% \t\r\n");
 837     if (*text++ != '@')
 838         return 0;
 839     if (!*text)
 840         return 0;
 841     while (*text && (isalnum((char)*text) || strchr(".-?*:", *text)))
 842         text++;
 843     return !*text;
 844 }
 845
 846 int
 847 is_shun(const char *text)
 848 {
 849     if (*text == '@')
 850         return 0;
 851     text += strcspn(text, "@!% \t\r\n");
 852     if (*text++ != '@')
 853         return 0;
 854     if (!*text)
 855         return 0;
 856     while (*text && (isalnum((char)*text) || strchr(".-?*:", *text)))
 857         text++;
 858     return !*text;
 859 }
 860
 861 int
 862 split_ircmask(char *text, char **nick, char **ident, char **host)
 863 {
 864     char *start;
 865
 866     start = text;
 867     while (isalnum((char)*text) || strchr("=[]\\`^{}?*", *text))
 868         text++;
 869     if (*text != '!' || ((text - start) > NICKLEN))
 870         return 0;
 871     *text = 0;
 872     if (nick)
 873         *nick = start;
 874
 875     start = ++text;
 876     while (*text && *text != '@' && !isspace((char)*text))
 877         text++;
 878     if (*text != '@' || ((text - start) > USERLEN))
 879         return 0;
 880     *text = 0;
 881     if (ident)
 882         *ident = start;
 883
 884     start = ++text;
 885     while (*text && (isalnum((char)*text) || strchr(".-?*:", *text)))
 886         text++;
 887     if (host)
 888         *host = start;
 889     return !*text && ((text - start) <= HOSTLEN) && nick && ident && host;
 890 }
 891
 892 char *
 893 sanitize_ircmask(char *input)
 894 {
 895     unsigned int length, flag;
 896     char *mask, *start, *output;
 897
 898     /* Sanitize everything in place; input *must* be a valid
 899        hostmask. */
 900     output = input;
 901     flag = 0;
 902
 903     /* The nick is truncated at the end. */
 904     length = 0;
 905     mask = input;
 906     while(*input++ != '!')
 907     {
 908         length++;
 909     }
 910     if(length > NICKLEN)
 911     {
 912         mask += NICKLEN;
 913         *mask++ = '!';
 914
 915         /* This flag is used to indicate following parts should
 916            be shifted. */
 917         flag = 1;
 918     }
 919     else
 920     {
 921         mask = input;
 922     }
 923
 924     /* The ident and host must be truncated at the beginning and
 925        replaced with a '*' to be compatible with ircu. */
 926     length = 0;
 927     start = input;
 928     while(*input++ != '@')
 929     {
 930         length++;
 931     }
 932     if(length > USERLEN || flag)
 933     {
 934         if(length > USERLEN)
 935         {
 936             start = input - USERLEN;
 937             *mask++ = '*';
 938         }
 939         while(*start != '@')
 940         {
 941             *mask++ = *start++;
 942         }
 943         *mask++ = '@';
 944
 945         flag = 1;
 946     }
 947     else
 948     {
 949         mask = input;
 950     }
 951
 952     length = 0;
 953     start = input;
 954     while(*input++)
 955     {
 956         length++;
 957     }
 958     if(length > HOSTLEN || flag)
 959     {
 960         if(length > HOSTLEN)
 961         {
 962             start = input - HOSTLEN;
 963             *mask++ = '*';
 964         }
 965         while(*start)
 966         {
 967             *mask++ = *start++;
 968         }
 969         *mask = '\0';
 970     }
 971
 972     return output;
 973 }
 974
 975 static long
 976 TypeLength(char type)
 977 {
 978     switch (type) {
 979     case 'y': return 365*24*60*60;
 980     case 'M': return 30*24*60*60;
 981     case 'w': return 7*24*60*60;
 982     case 'd': return 24*60*60;
 983     case 'h': return 60*60;
 984     case 'm': return 60;
 985     case 's': return 1;
 986     default: return 0;
 987     }
 988 }
 989
 990 /* This function is not entirely accurate as it does not take into account leap units
 991  * or varying months. TODO: use proper dateadd functions to calculate real seconds
 992  * from now for the units (eg 1M should be give us seconds till todays date next month)
 993  */
 994 unsigned long
 995 ParseInterval(const char *interval)
 996 {
 997     unsigned long seconds = 0;
 998     int partial = 0;
 999     char c;
1000
1001     /* process the string, resetting the count if we find a unit character */
1002     while ((c = *interval++)) {
1003         if (isdigit((int)c)) {
1004             partial = partial*10 + c - '0';
1005         } else if (strchr("yMwdhms", c)) {
1006             seconds += TypeLength(c) * partial;
1007             partial = 0;
1008         } else {
1009             return 0;
1010         }
1011     }
1012     /* assume the last chunk is seconds (the normal case) */
1013     return seconds + partial;
1014 }
1015
1016 static long
1017 GetSizeMultiplier(char type)
1018 {
1019     switch (type) {
1020     case 'G': case 'g': return 1024*1024*1024;
1021     case 'M': case 'm': return 1024*1024;
1022     case 'K': case 'k': return 1024;
1023     case 'B': case 'b': return 1;
1024     default: return 0;
1025     }
1026 }
1027
1028 unsigned long
1029 ParseVolume(const char *volume)
1030 {
1031     unsigned long accum = 0, partial = 0;
1032     char c;
1033     while ((c = *volume++)) {
1034         if (isdigit((int)c)) {
1035             partial = partial*10 + c - '0';
1036         } else {
1037             accum += GetSizeMultiplier(c) * partial;
1038             partial = 0;
1039         }
1040     }
1041     return accum + partial;
1042 }
1043
1044 char *
1045 unsplit_string(char *set[], unsigned int max, char *dest)
1046 {
1047     static char unsplit_buffer[MAXLEN*2];
1048     unsigned int ii, jj, pos;
1049
1050     if (!dest)
1051         dest = unsplit_buffer;
1052     for (ii=pos=0; ii<max; ii++) {
1053         for (jj=0; set[ii][jj]; jj++)
1054             dest[pos++] = set[ii][jj];
1055         dest[pos++] = ' ';
1056     }
1057     dest[--pos] = 0;
1058     return dest;
1059 }
1060
1061 char *
1062 intervalString(char *output, time_t interval, struct handle_info *hi)
1063 {
1064     static const struct {
1065         const char *msg_single;
1066         const char *msg_plural;
1067         long length;
1068     } unit[] = {
1069         { "MSG_YEAR",   "MSG_YEARS", 365 * 24 * 60 * 60 },
1070         { "MSG_WEEK",   "MSG_WEEKS",   7 * 24 * 60 * 60 },
1071         { "MSG_DAY",    "MSG_DAYS",        24 * 60 * 60 },
1072         { "MSG_HOUR",   "MSG_HOURS",            60 * 60 },
1073         { "MSG_MINUTE", "MSG_MINUTES",               60 },
1074         { "MSG_SECOND", "MSG_SECONDS",                1 }
1075     };
1076     struct language *lang;
1077     const char *msg;
1078     unsigned int type, words, pos, count;
1079
1080     lang = hi ? hi->language : lang_C;
1081     if(!interval)
1082     {
1083         msg = language_find_message(lang, "MSG_0_SECONDS");
1084         return strcpy(output, msg);
1085     }
1086
1087     for (type = 0, words = pos = 0;
1088          interval && (words < 2) && (type < ArrayLength(unit));
1089          type++) {
1090         if (interval < unit[type].length)
1091             continue;
1092         count = interval / unit[type].length;
1093         interval = interval % unit[type].length;
1094
1095         if (words++ == 1) {
1096             msg = language_find_message(lang, "MSG_AND");
1097             pos += sprintf(output + pos, "%s ", msg);
1098         }
1099         if (count == 1)
1100             msg = language_find_message(lang, unit[type].msg_single);
1101         else
1102             msg = language_find_message(lang, unit[type].msg_plural);
1103         pos += sprintf(output + pos, "%d%s", count, msg);
1104     }
1105
1106     output[pos] = 0;
1107     return output;
1108 }
1109
1110 int
1111 getipbyname(const char *name, unsigned long *ip)
1112 {
1113     struct hostent *he = gethostbyname(name);
1114     if (!he)
1115         return 0;
1116     if (he->h_addrtype != AF_INET)
1117         return 0;
1118     memcpy(ip, he->h_addr_list[0], sizeof(*ip));
1119     return 1;
1120 }
1121
1122 DEFINE_LIST(string_buffer, char)
1123
1124 void
1125 string_buffer_append_substring(struct string_buffer *buf, const char *tail, unsigned int len)
1126 {
1127     while (buf->used + len >= buf->size) {
1128         if (!buf->size)
1129             buf->size = 16;
1130         else
1131             buf->size <<= 1;
1132         buf->list = realloc(buf->list, buf->size*sizeof(buf->list[0]));
1133     }
1134     memcpy(buf->list + buf->used, tail, len+1);
1135     buf->used += len;
1136 }
1137
1138 void
1139 string_buffer_append_string(struct string_buffer *buf, const char *tail)
1140 {
1141     string_buffer_append_substring(buf, tail, strlen(tail));
1142 }
1143
1144 void
1145 string_buffer_append_vprintf(struct string_buffer *buf, const char *fmt, va_list args)
1146 {
1147     va_list working;
1148     unsigned int len;
1149     int ret;
1150
1151     VA_COPY(working, args);
1152     len = strlen(fmt);
1153     if (!buf->list || ((buf->used + buf->size) < len)) {
1154         buf->size = buf->used + len;
1155         buf->list = realloc(buf->list, buf->size);
1156     }
1157     ret = vsnprintf(buf->list + buf->used, buf->size - buf->used, fmt, working);
1158     if (ret <= 0) {
1159         /* pre-C99 behavior; double buffer size until it is big enough */
1160         va_end(working);
1161         VA_COPY(working, args);
1162         while ((ret = vsnprintf(buf->list + buf->used, buf->size - buf->used, fmt, working)) <= 0) {
1163             buf->size += len;
1164             buf->list = realloc(buf->list, buf->size);
1165             va_end(working);
1166             VA_COPY(working, args);
1167         }
1168         buf->used += ret;
1169     } else if (buf->used + ret < buf->size) {
1170         /* no need to increase allocation size */
1171         buf->used += ret;
1172     } else {
1173         /* now we know exactly how much space we need */
1174         if (buf->size <= buf->used + ret) {
1175             buf->size = buf->used + ret + 1;
1176             buf->list = realloc(buf->list, buf->size);
1177         }
1178         va_end(working);
1179         VA_COPY(working, args);
1180         buf->used += vsnprintf(buf->list + buf->used, buf->size, fmt, working);
1181     }
1182     va_end(working);
1183     va_end(args);
1184 }
1185
1186 void string_buffer_append_printf(struct string_buffer *buf, const char *fmt, ...)
1187 {
1188     va_list args;
1189     va_start(args, fmt);
1190     string_buffer_append_vprintf(buf, fmt, args);
1191 }
1192
1193 void
1194 string_buffer_replace(struct string_buffer *buf, unsigned int from, unsigned int len, const char *repl)
1195 {
1196     unsigned int repl_len = strlen(repl);
1197     if (from > buf->used)
1198         return;
1199     if (len + from > buf->used)
1200         len = buf->used - from;
1201     buf->used = buf->used + repl_len - len;
1202     if (buf->size <= buf->used) {
1203         while (buf->used >= buf->size)
1204             buf->size <<= 1;
1205         buf->list = realloc(buf->list, buf->size*sizeof(buf->list[0]));
1206     }
1207     memmove(buf->list+from+repl_len, buf->list+from+len, strlen(buf->list+from+len));
1208     strcpy(buf->list+from, repl);
1209 }
1210
1211 struct string_list str_tab;
1212
1213 const char *
1214 strtab(unsigned int ii) {
1215     if (ii > 65536)
1216         return NULL;
1217     if (ii > str_tab.size) {
1218         unsigned int old_size = str_tab.size;
1219         while (ii >= str_tab.size)
1220             str_tab.size <<= 1;
1221         str_tab.list = realloc(str_tab.list, str_tab.size*sizeof(str_tab.list[0]));
1222         memset(str_tab.list+old_size, 0, (str_tab.size-old_size)*sizeof(str_tab.list[0]));
1223     }
1224     if (!str_tab.list[ii]) {
1225         str_tab.list[ii] = malloc(12);
1226         sprintf(str_tab.list[ii], "%u", ii);
1227     }
1228     return str_tab.list[ii];
1229 }
1230
1231 void
1232 tools_init(void)
1233 {
1234     unsigned int upr, lwr;
1235     for (lwr=0; lwr<256; ++lwr)
1236         tolower(lwr) = lwr;
1237     for (upr='A', lwr='a'; lwr <= 'z'; ++upr, ++lwr)
1238         tolower(upr) = lwr;
1239 #ifdef WITH_PROTOCOL_P10
1240     for (upr='[', lwr='{'; lwr <= '~'; ++upr, ++lwr)
1241         tolower(upr) = lwr;
1242     for (upr=0xc0, lwr=0xe0; lwr <= 0xf6; ++upr, ++lwr)
1243         tolower(upr) = lwr;
1244     for (upr=0xd8, lwr=0xf8; lwr <= 0xfe; ++upr, ++lwr)
1245         tolower(upr) = lwr;
1246 #endif
1247     str_tab.size = 1001;
1248     str_tab.list = calloc(str_tab.size, sizeof(str_tab.list[0]));
1249 }
1250
1251 void
1252 tools_cleanup(void)
1253 {
1254     unsigned int ii;
1255     for (ii=0; ii<str_tab.size; ++ii)
1256         free(str_tab.list[ii]);
1257     free(str_tab.list);
1258 }
1259
1260 /* mysep() is my answer to the strtok/strsep
1261  * issue. strsep is nice but doesn't skip
1262  * multiple dilimiters, which can really
1263  * offset tokens and cause huge corruption
1264  * so this function will use strsep but
1265  * act like strtok in that sense.
1266  */
1267 char *mysep(char **sepstr, char *delim)
1268 {
1269   static char *retstr;
1270
1271   if(!*sepstr || !**sepstr)
1272     return(NULL);
1273
1274   do
1275   {
1276       retstr = strsep(sepstr, delim);
1277   }while (retstr && !(*retstr));
1278
1279   return(retstr);
1280 }
1281
1282 /* Mallocing snprintf *
1283  *
1284  * If it overruns size, it will simply be safely truncated.
1285  */
1286 char *
1287 x3_msnprintf(const int size, const char *format, ...)
1288 {
1289     va_list ap;
1290     char* buff = calloc(sizeof(char *), size+1);
1291
1292     va_start(ap, format);
1293     vsnprintf(buff, size, format, ap);
1294     va_end(ap);
1295     buff = realloc(buff, strlen(buff) + 1);
1296     return buff;
1297 }
1298
1299 char *time2str(time_t thetime)
1300 {
1301     char *buf, *tmp;
1302
1303     buf = ctime(&thetime);
1304     tmp = (char *)strchr(buf, '\n');
1305     *tmp = '\0';
1306     return(buf);
1307 }
1308
1309 char* x3_strtok(char **save, char *str, char *fs)
1310 {
1311   char *pos = *save;            /* keep last position across calls */
1312   char *tmp;
1313
1314   if (str)
1315     pos = str;                  /* new string scan */
1316
1317   while (pos && *pos && strchr(fs, *pos) != NULL)
1318     pos++;                      /* skip leading separators */
1319
1320   if (!pos || !*pos)
1321     return (pos = *save = NULL);        /* string contains only sep's */
1322
1323   tmp = pos;                    /* now, keep position of the token */
1324
1325   while (*pos && strchr(fs, *pos) == NULL)
1326     pos++;                      /* skip content of the token */
1327
1328   if (*pos)
1329     *pos++ = '\0';              /* remove first sep after the token */
1330   else
1331     pos = NULL;                 /* end of string */
1332
1333   *save = pos;
1334   return (tmp);
1335 }
1336
1337 int valid_email(const char *email)
1338 {
1339     unsigned int i;
1340     for (i=0;i<strlen(email);i++)
1341     {
1342         if(!isalnum(email[i]) &&
1343                email[i] != '.' &&
1344                email[i] != '@' &&
1345                email[i] != '-' &&
1346                email[i] != '+' &&
1347                email[i] != '_' )
1348             return false;
1349     }
1350     if(strchr(email, '@') == NULL)
1351         return false;
1352     return true;
1353 }
1354
1355 /*
1356  * Create a string of form "foo!bar@fubar" given foo, bar and fubar
1357  * as the parameters.  If NULL, they become "*".
1358  */
1359 #define NUH_BUFSIZE     (NICKLEN + USERLEN + HOSTLEN + 10)
1360 static char *make_nick_user_host(char *namebuf, const char *nick,
1361                                  const char *name, const char *host)
1362 {
1363   snprintf(namebuf, NUH_BUFSIZE, "%s!%s@%s", nick, name, host);
1364   return namebuf;
1365 }
1366
1367 /*
1368  * pretty_mask
1369  *
1370  * by Carlo Wood (Run), 05 Oct 1998.
1371  *
1372  * Canonify a mask.
1373  *
1374  * When the nick is longer then NICKLEN, it is cut off (its an error of course).
1375  * When the user name or host name are too long (USERLEN and HOSTLEN
1376  * respectively) then they are cut off at the start with a '*'.
1377  *
1378  * The following transformations are made:
1379  *
1380  * 1)   xxx             -> nick!*@*
1381  * 2)   xxx.xxx         -> *!*@host
1382  * 3)   xxx!yyy         -> nick!user@*
1383  * 4)   xxx@yyy         -> *!user@host
1384  * 5)   xxx!yyy@zzz     -> nick!user@host
1385  */
1386 char *pretty_mask(char *mask)
1387 {
1388   static char star[2] = { '*', 0 };
1389   static char retmask[NUH_BUFSIZE] = "";
1390   char *last_dot = NULL;
1391   char *ptr = NULL;
1392
1393   /* Case 1: default */
1394   char *nick = mask;
1395   char *user = star;
1396   char *host = star;
1397
1398   /* Do a _single_ pass through the characters of the mask: */
1399   for (ptr = mask; *ptr; ++ptr)
1400   {
1401     if (*ptr == '!')
1402     {
1403       /* Case 3 or 5: Found first '!' (without finding a '@' yet) */
1404       user = ++ptr;
1405       host = star;
1406     }
1407     else if (*ptr == '@')
1408     {
1409       /* Case 4: Found last '@' (without finding a '!' yet) */
1410       nick = star;
1411       user = mask;
1412       host = ++ptr;
1413     }
1414     else if (*ptr == '.')
1415     {
1416       /* Case 2: Found last '.' (without finding a '!' or '@' yet) */
1417       last_dot = ptr;
1418       continue;
1419     }
1420     else
1421       continue;
1422     for (; *ptr; ++ptr)
1423     {
1424       if (*ptr == '@')
1425       {
1426         /* Case 4 or 5: Found last '@' */
1427         host = ptr + 1;
1428       }
1429     }
1430     break;
1431   }
1432   if (user == star && last_dot)
1433   {
1434     /* Case 2: */
1435     nick = star;
1436     user = star;
1437     host = mask;
1438   }
1439   /* Check lengths */
1440   if (nick != star)
1441   {
1442     char *nick_end = (user != star) ? user - 1 : ptr;
1443     if (nick_end - nick > NICKLEN)
1444       nick[NICKLEN] = 0;
1445     *nick_end = 0;
1446   }
1447   if (user != star)
1448   {
1449     char *user_end = (host != star) ? host - 1 : ptr;
1450     if (user_end - user > USERLEN)
1451     {
1452       user = user_end - USERLEN;
1453       *user = '*';
1454     }
1455     *user_end = 0;
1456   }
1457   if (host != star && ptr - host > HOSTLEN)
1458   {
1459     host = ptr - HOSTLEN;
1460     *host = '*';
1461   }
1462   return make_nick_user_host(retmask, nick, user, host);
1463 }
1464
1465 int str_is_number(const char *str)
1466 {
1467     char *ptr;
1468     int ret = false;
1469     for(ptr = (char *)str;*ptr;ptr++) {
1470         if((*ptr >= '0' && *ptr <= '9') || *ptr == '-')
1471             ret = true;
1472         else
1473             return false;
1474     }
1475     return ret;
1476 }