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, int shared)
 606 {
 607     char *tmpglob, *glob, *marker;
 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     struct chanNode *channel;
 613     struct banNode *ban;
 614
 615     /* Make a writable copy of the glob */
 616     glob = alloca(strlen(orig_glob)+1);
 617     strcpy(glob, orig_glob);
 618
 619     /* Extended bans */
 620     tmpglob = alloca(strlen(orig_glob)+1);
 621     tmpglob = strdup(orig_glob);
 622
 623     if (*tmpglob == '~') {
 624         tmpglob++; /* get rid of the ~ */
 625
 626         if (*tmpglob == '!') {
 627             extreverse = 1;
 628             tmpglob++; /* get rid of the ! */
 629         }
 630
 631         exttype = *tmpglob;
 632         tmpglob++; /* get rid of the type */
 633
 634         if (*tmpglob == ':') {
 635             is_extended = 1;
 636             tmpglob++; /* get rid of the : */
 637             glob = strdup(tmpglob);
 638         }
 639     }
 640
 641     if (is_extended) {
 642         log_module(MAIN_LOG, LOG_DEBUG, "Extended ban. T (%c) R (%d) M (%s)", exttype, extreverse, glob);
 643         switch (exttype) {
 644             case 'a':
 645                 if (user->handle_info) {
 646                     if (extreverse) {
 647                         if (0 != strcasecmp(glob, user->handle_info->handle))
 648                             return 1;
 649                     } else {
 650                         if (0 == strcasecmp(glob, user->handle_info->handle))
 651                             return 1;
 652                     }
 653                 } else {
 654                     if (extreverse)
 655                         return 1;
 656                 }
 657                 return match_ircglob(user->hostname, glob);
 658             case 'c':
 659                 if (!strstr(glob, "#"))
 660                     return -1;
 661
 662                 if (extreverse) {
 663                     for (n=count=0; n<user->channels.used; n++) {
 664                         mn = user->channels.list[n];
 665                         match = 0;
 666
 667                         if (*glob == '#') {
 668                             if (0 == strcasecmp(glob, mn->channel->name))
 669                                 match = 1;
 670                         } else {
 671                             if (0 == strcasecmp(glob+1, mn->channel->name)) {
 672                                 if ((*glob == '@') && (mn->modes & MODE_CHANOP))
 673                                     match = 1;
 674                                 else if ((*glob == '%') && (mn->modes & MODE_HALFOP))
 675                                     match = 1;
 676                                 else if ((*glob == '+') && (mn->modes & MODE_VOICE))
 677                                     match = 1;
 678                              }
 679                         }
 680
 681                         if (match == 0)
 682                             banned = 1;
 683                         else {
 684                             banned = 0;
 685                             break;
 686                         }
 687                     }
 688                 } else {
 689                     for (n=count=0; n<user->channels.used; n++) {
 690                         mn = user->channels.list[n];
 691                         match = 0;
 692
 693                         if (*glob == '#') {
 694                             if (0 == strcasecmp(glob, mn->channel->name))
 695                                 match = 1;
 696                         } else {
 697                             if (0 == strcasecmp(glob+1, mn->channel->name)) {
 698                                 if ((*glob == '@') && (mn->modes & MODE_CHANOP))
 699                                     match = 1;
 700                                 else if ((*glob == '%') && (mn->modes & MODE_HALFOP))
 701                                     match = 1;
 702                                 else if ((*glob == '+') && (mn->modes & MODE_VOICE))
 703                                     match = 1;
 704                              }
 705                         }
 706
 707                         if (match == 1)
 708                             banned = 1;
 709                     }
 710                 }
 711
 712                 if (banned)
 713                     return 1;
 714                 else
 715                     return match_ircglob(user->hostname, glob);
 716             case 'j':
 717                  if (shared == 0) {
 718                      if (*glob != '#')
 719                          return -1;
 720                      if ((channel = GetChannel(glob))) {
 721                          for (n = 0; n < channel->banlist.used; n++) {
 722                              ban = channel->banlist.list[n];
 723                              if (user_matches_glob(user, ban->ban, flags, 1))
 724                                  return 1;
 725                          }
 726                      }
 727                  }
 728                  return match_ircglob(user->hostname, glob);
 729             case 'n': /* this is handled ircd side */
 730                 return match_ircglob(user->hostname, glob);
 731             case 'q': /* this is handled ircd side */
 732                 return match_ircglob(user->hostname, glob);
 733             case 't': /* this is handled ircd side */
 734                 return match_ircglob(user->hostname, glob);
 735             case 'R': /* this is handled ircd side */
 736                 return match_ircglob(user->hostname, glob);
 737             default:
 738                 return -1;
 739         }
 740     }
 741
 742     /* Check the nick, if it's present */
 743     if (flags & MATCH_USENICK) {
 744         if (!(marker = strchr(glob, '!'))) {
 745             log_module(MAIN_LOG, LOG_ERROR, "user_matches_glob(\"%s\", \"%s\", %d) called, and glob doesn't include a '!'", user->nick, orig_glob, flags);
 746             return 0;
 747         }
 748         *marker = 0;
 749         if (!match_ircglob(user->nick, glob)) return 0;
 750         glob = marker + 1;
 751     }
 752     /* Check the ident */
 753     if (!(marker = strchr(glob, '@'))) {
 754         log_module(MAIN_LOG, LOG_ERROR, "user_matches_glob(\"%s\", \"%s\", %d) called, and glob doesn't include an '@'", user->nick, orig_glob, flags);
 755         return 0;
 756     }
 757     *marker = 0;
 758     if (!match_ircglob(user->ident, glob))
 759         return 0;
 760     glob = marker + 1;
 761     /* Check for a fakehost match. */
 762     if (IsFakeHost(user) && match_ircglob(user->fakehost, glob))
 763         return 1;
 764
 765     /* Check for a sethost (S:lines) */
 766     if (IsSetHost(user) && match_ircglob(user->sethost, glob))
 767         return 1;
 768
 769     /* Check for an account match. */
 770     if (hidden_host_suffix && user->handle_info) {
 771         char hidden_host[HOSTLEN+1];
 772         snprintf(hidden_host, sizeof(hidden_host), "%s.%s", user->handle_info->handle, hidden_host_suffix);
 773         if (match_ircglob(hidden_host, glob))
 774             return 1;
 775     }
 776
 777     /* Match crypt hostname */
 778     if (match_ircglob(user->crypthost, glob))
 779         return 1;
 780
 781     /* Match crypt IP */
 782     if (match_ircglob(user->cryptip, glob))
 783         return 1;
 784
 785     /* If only matching the visible hostnames, bail early. */
 786     if ((flags & MATCH_VISIBLE) && IsHiddenHost(user)
 787         && (IsFakeHost(user) || (hidden_host_suffix && user->handle_info)))
 788         return 0;
 789     /* If it might be an IP glob, test that. */
 790     if (!glob[strspn(glob, "0123456789./*?")]
 791         && match_ircglob(irc_ntoa(&user->ip), glob))
 792         return 1;
 793     /* None of the above; could only be a hostname match. */
 794     return match_ircglob(user->hostname, glob);
 795 }
 796
 797 int
 798 is_ircmask(const char *text)
 799 {
 800     char *tmptext;
 801
 802     if (*text == '~') {
 803         tmptext = alloca(strlen(text)+1);
 804         tmptext = strdup(text);
 805
 806         tmptext++; /* get rid of the ~ */
 807
 808         if (*tmptext == '!')
 809             tmptext++; /* get rid of the ! if it exists */
 810
 811         tmptext++; /* get rid of the ext ban type */
 812
 813         if (*tmptext == ':') {
 814             tmptext++; /* get rid of the : */
 815             while (*tmptext && !isspace((char)*tmptext))
 816                 tmptext++;  /* get rid of the rest */
 817             return !*tmptext;
 818         }
 819     }
 820
 821     while (*text && (isalnum((char)*text) || strchr("-_[]|\\`^{}?*", *text)))
 822         text++;
 823     if (*text++ != '!')
 824         return 0;
 825     while (*text && *text != '@' && !isspace((char)*text))
 826         text++;
 827     if (*text++ != '@')
 828         return 0;
 829     while (*text && !isspace((char)*text))
 830         text++;
 831     return !*text;
 832 }
 833
 834 int
 835 is_gline(const char *text)
 836 {
 837     if (*text == '@')
 838         return 0;
 839     text += strcspn(text, "@!% \t\r\n");
 840     if (*text++ != '@')
 841         return 0;
 842     if (!*text)
 843         return 0;
 844     while (*text && (isalnum((char)*text) || strchr(".-?*:", *text)))
 845         text++;
 846     return !*text;
 847 }
 848
 849 int
 850 is_shun(const char *text)
 851 {
 852     if (*text == '@')
 853         return 0;
 854     text += strcspn(text, "@!% \t\r\n");
 855     if (*text++ != '@')
 856         return 0;
 857     if (!*text)
 858         return 0;
 859     while (*text && (isalnum((char)*text) || strchr(".-?*:", *text)))
 860         text++;
 861     return !*text;
 862 }
 863
 864 int
 865 split_ircmask(char *text, char **nick, char **ident, char **host)
 866 {
 867     char *start;
 868
 869     start = text;
 870     while (isalnum((char)*text) || strchr("=[]\\`^{}?*", *text))
 871         text++;
 872     if (*text != '!' || ((text - start) > NICKLEN))
 873         return 0;
 874     *text = 0;
 875     if (nick)
 876         *nick = start;
 877
 878     start = ++text;
 879     while (*text && *text != '@' && !isspace((char)*text))
 880         text++;
 881     if (*text != '@' || ((text - start) > USERLEN))
 882         return 0;
 883     *text = 0;
 884     if (ident)
 885         *ident = start;
 886
 887     start = ++text;
 888     while (*text && (isalnum((char)*text) || strchr(".-?*:", *text)))
 889         text++;
 890     if (host)
 891         *host = start;
 892     return !*text && ((text - start) <= HOSTLEN) && nick && ident && host;
 893 }
 894
 895 char *
 896 sanitize_ircmask(char *input)
 897 {
 898     unsigned int length, flag;
 899     char *mask, *start, *output;
 900
 901     /* Sanitize everything in place; input *must* be a valid
 902        hostmask. */
 903     output = input;
 904     flag = 0;
 905
 906     /* The nick is truncated at the end. */
 907     length = 0;
 908     mask = input;
 909     while(*input++ != '!')
 910     {
 911         length++;
 912     }
 913     if(length > NICKLEN)
 914     {
 915         mask += NICKLEN;
 916         *mask++ = '!';
 917
 918         /* This flag is used to indicate following parts should
 919            be shifted. */
 920         flag = 1;
 921     }
 922     else
 923     {
 924         mask = input;
 925     }
 926
 927     /* The ident and host must be truncated at the beginning and
 928        replaced with a '*' to be compatible with ircu. */
 929     length = 0;
 930     start = input;
 931     while(*input++ != '@')
 932     {
 933         length++;
 934     }
 935     if(length > USERLEN || flag)
 936     {
 937         if(length > USERLEN)
 938         {
 939             start = input - USERLEN;
 940             *mask++ = '*';
 941         }
 942         while(*start != '@')
 943         {
 944             *mask++ = *start++;
 945         }
 946         *mask++ = '@';
 947
 948         flag = 1;
 949     }
 950     else
 951     {
 952         mask = input;
 953     }
 954
 955     length = 0;
 956     start = input;
 957     while(*input++)
 958     {
 959         length++;
 960     }
 961     if(length > HOSTLEN || flag)
 962     {
 963         if(length > HOSTLEN)
 964         {
 965             start = input - HOSTLEN;
 966             *mask++ = '*';
 967         }
 968         while(*start)
 969         {
 970             *mask++ = *start++;
 971         }
 972         *mask = '\0';
 973     }
 974
 975     return output;
 976 }
 977
 978 static long
 979 TypeLength(char type)
 980 {
 981     switch (type) {
 982     case 'y': return 365*24*60*60;
 983     case 'M': return 30*24*60*60;
 984     case 'w': return 7*24*60*60;
 985     case 'd': return 24*60*60;
 986     case 'h': return 60*60;
 987     case 'm': return 60;
 988     case 's': return 1;
 989     default: return 0;
 990     }
 991 }
 992
 993 /* This function is not entirely accurate as it does not take into account leap units
 994  * or varying months. TODO: use proper dateadd functions to calculate real seconds
 995  * from now for the units (eg 1M should be give us seconds till todays date next month)
 996  */
 997 unsigned long
 998 ParseInterval(const char *interval)
 999 {
1000     unsigned long seconds = 0;
1001     int partial = 0;
1002     char c;
1003
1004     /* process the string, resetting the count if we find a unit character */
1005     while ((c = *interval++)) {
1006         if (isdigit((int)c)) {
1007             partial = partial*10 + c - '0';
1008         } else if (strchr("yMwdhms", c)) {
1009             seconds += TypeLength(c) * partial;
1010             partial = 0;
1011         } else {
1012             return 0;
1013         }
1014     }
1015     /* assume the last chunk is seconds (the normal case) */
1016     return seconds + partial;
1017 }
1018
1019 static long
1020 GetSizeMultiplier(char type)
1021 {
1022     switch (type) {
1023     case 'G': case 'g': return 1024*1024*1024;
1024     case 'M': case 'm': return 1024*1024;
1025     case 'K': case 'k': return 1024;
1026     case 'B': case 'b': return 1;
1027     default: return 0;
1028     }
1029 }
1030
1031 unsigned long
1032 ParseVolume(const char *volume)
1033 {
1034     unsigned long accum = 0, partial = 0;
1035     char c;
1036     while ((c = *volume++)) {
1037         if (isdigit((int)c)) {
1038             partial = partial*10 + c - '0';
1039         } else {
1040             accum += GetSizeMultiplier(c) * partial;
1041             partial = 0;
1042         }
1043     }
1044     return accum + partial;
1045 }
1046
1047 char *
1048 unsplit_string(char *set[], unsigned int max, char *dest)
1049 {
1050     static char unsplit_buffer[MAXLEN*2];
1051     unsigned int ii, jj, pos;
1052
1053     if (!dest)
1054         dest = unsplit_buffer;
1055     for (ii=pos=0; ii<max; ii++) {
1056         for (jj=0; set[ii][jj]; jj++)
1057             dest[pos++] = set[ii][jj];
1058         dest[pos++] = ' ';
1059     }
1060     dest[--pos] = 0;
1061     return dest;
1062 }
1063
1064 char *
1065 intervalString(char *output, time_t interval, struct handle_info *hi)
1066 {
1067     static const struct {
1068         const char *msg_single;
1069         const char *msg_plural;
1070         long length;
1071     } unit[] = {
1072         { "MSG_YEAR",   "MSG_YEARS", 365 * 24 * 60 * 60 },
1073         { "MSG_WEEK",   "MSG_WEEKS",   7 * 24 * 60 * 60 },
1074         { "MSG_DAY",    "MSG_DAYS",        24 * 60 * 60 },
1075         { "MSG_HOUR",   "MSG_HOURS",            60 * 60 },
1076         { "MSG_MINUTE", "MSG_MINUTES",               60 },
1077         { "MSG_SECOND", "MSG_SECONDS",                1 }
1078     };
1079     struct language *lang;
1080     const char *msg;
1081     unsigned int type, words, pos, count;
1082
1083     lang = hi ? hi->language : lang_C;
1084     if(!interval)
1085     {
1086         msg = language_find_message(lang, "MSG_0_SECONDS");
1087         return strcpy(output, msg);
1088     }
1089
1090     for (type = 0, words = pos = 0;
1091          interval && (words < 2) && (type < ArrayLength(unit));
1092          type++) {
1093         if (interval < unit[type].length)
1094             continue;
1095         count = interval / unit[type].length;
1096         interval = interval % unit[type].length;
1097
1098         if (words++ == 1) {
1099             msg = language_find_message(lang, "MSG_AND");
1100             pos += sprintf(output + pos, "%s ", msg);
1101         }
1102         if (count == 1)
1103             msg = language_find_message(lang, unit[type].msg_single);
1104         else
1105             msg = language_find_message(lang, unit[type].msg_plural);
1106         pos += sprintf(output + pos, "%d%s", count, msg);
1107     }
1108
1109     output[pos] = 0;
1110     return output;
1111 }
1112
1113 int
1114 getipbyname(const char *name, unsigned long *ip)
1115 {
1116     struct hostent *he = gethostbyname(name);
1117     if (!he)
1118         return 0;
1119     if (he->h_addrtype != AF_INET)
1120         return 0;
1121     memcpy(ip, he->h_addr_list[0], sizeof(*ip));
1122     return 1;
1123 }
1124
1125 DEFINE_LIST(string_buffer, char)
1126
1127 void
1128 string_buffer_append_substring(struct string_buffer *buf, const char *tail, unsigned int len)
1129 {
1130     while (buf->used + len >= buf->size) {
1131         if (!buf->size)
1132             buf->size = 16;
1133         else
1134             buf->size <<= 1;
1135         buf->list = realloc(buf->list, buf->size*sizeof(buf->list[0]));
1136     }
1137     memcpy(buf->list + buf->used, tail, len+1);
1138     buf->used += len;
1139 }
1140
1141 void
1142 string_buffer_append_string(struct string_buffer *buf, const char *tail)
1143 {
1144     string_buffer_append_substring(buf, tail, strlen(tail));
1145 }
1146
1147 void
1148 string_buffer_append_vprintf(struct string_buffer *buf, const char *fmt, va_list args)
1149 {
1150     va_list working;
1151     unsigned int len;
1152     int ret;
1153
1154     VA_COPY(working, args);
1155     len = strlen(fmt);
1156     if (!buf->list || ((buf->used + buf->size) < len)) {
1157         buf->size = buf->used + len;
1158         buf->list = realloc(buf->list, buf->size);
1159     }
1160     ret = vsnprintf(buf->list + buf->used, buf->size - buf->used, fmt, working);
1161     if (ret <= 0) {
1162         /* pre-C99 behavior; double buffer size until it is big enough */
1163         va_end(working);
1164         VA_COPY(working, args);
1165         while ((ret = vsnprintf(buf->list + buf->used, buf->size - buf->used, fmt, working)) <= 0) {
1166             buf->size += len;
1167             buf->list = realloc(buf->list, buf->size);
1168             va_end(working);
1169             VA_COPY(working, args);
1170         }
1171         buf->used += ret;
1172     } else if (buf->used + ret < buf->size) {
1173         /* no need to increase allocation size */
1174         buf->used += ret;
1175     } else {
1176         /* now we know exactly how much space we need */
1177         if (buf->size <= buf->used + ret) {
1178             buf->size = buf->used + ret + 1;
1179             buf->list = realloc(buf->list, buf->size);
1180         }
1181         va_end(working);
1182         VA_COPY(working, args);
1183         buf->used += vsnprintf(buf->list + buf->used, buf->size, fmt, working);
1184     }
1185     va_end(working);
1186     va_end(args);
1187 }
1188
1189 void string_buffer_append_printf(struct string_buffer *buf, const char *fmt, ...)
1190 {
1191     va_list args;
1192     va_start(args, fmt);
1193     string_buffer_append_vprintf(buf, fmt, args);
1194 }
1195
1196 void
1197 string_buffer_replace(struct string_buffer *buf, unsigned int from, unsigned int len, const char *repl)
1198 {
1199     unsigned int repl_len = strlen(repl);
1200     if (from > buf->used)
1201         return;
1202     if (len + from > buf->used)
1203         len = buf->used - from;
1204     buf->used = buf->used + repl_len - len;
1205     if (buf->size <= buf->used) {
1206         while (buf->used >= buf->size)
1207             buf->size <<= 1;
1208         buf->list = realloc(buf->list, buf->size*sizeof(buf->list[0]));
1209     }
1210     memmove(buf->list+from+repl_len, buf->list+from+len, strlen(buf->list+from+len));
1211     strcpy(buf->list+from, repl);
1212 }
1213
1214 struct string_list str_tab;
1215
1216 const char *
1217 strtab(unsigned int ii) {
1218     if (ii > 65536)
1219         return NULL;
1220     if (ii > str_tab.size) {
1221         unsigned int old_size = str_tab.size;
1222         while (ii >= str_tab.size)
1223             str_tab.size <<= 1;
1224         str_tab.list = realloc(str_tab.list, str_tab.size*sizeof(str_tab.list[0]));
1225         memset(str_tab.list+old_size, 0, (str_tab.size-old_size)*sizeof(str_tab.list[0]));
1226     }
1227     if (!str_tab.list[ii]) {
1228         str_tab.list[ii] = malloc(12);
1229         sprintf(str_tab.list[ii], "%u", ii);
1230     }
1231     return str_tab.list[ii];
1232 }
1233
1234 void
1235 tools_init(void)
1236 {
1237     unsigned int upr, lwr;
1238     for (lwr=0; lwr<256; ++lwr)
1239         tolower(lwr) = lwr;
1240     for (upr='A', lwr='a'; lwr <= 'z'; ++upr, ++lwr)
1241         tolower(upr) = lwr;
1242 #ifdef WITH_PROTOCOL_P10
1243     for (upr='[', lwr='{'; lwr <= '~'; ++upr, ++lwr)
1244         tolower(upr) = lwr;
1245     for (upr=0xc0, lwr=0xe0; lwr <= 0xf6; ++upr, ++lwr)
1246         tolower(upr) = lwr;
1247     for (upr=0xd8, lwr=0xf8; lwr <= 0xfe; ++upr, ++lwr)
1248         tolower(upr) = lwr;
1249 #endif
1250     str_tab.size = 1001;
1251     str_tab.list = calloc(str_tab.size, sizeof(str_tab.list[0]));
1252 }
1253
1254 void
1255 tools_cleanup(void)
1256 {
1257     unsigned int ii;
1258     for (ii=0; ii<str_tab.size; ++ii)
1259         free(str_tab.list[ii]);
1260     free(str_tab.list);
1261 }
1262
1263 /* mysep() is my answer to the strtok/strsep
1264  * issue. strsep is nice but doesn't skip
1265  * multiple dilimiters, which can really
1266  * offset tokens and cause huge corruption
1267  * so this function will use strsep but
1268  * act like strtok in that sense.
1269  */
1270 char *mysep(char **sepstr, char *delim)
1271 {
1272   static char *retstr;
1273
1274   if(!*sepstr || !**sepstr)
1275     return(NULL);
1276
1277   do
1278   {
1279       retstr = strsep(sepstr, delim);
1280   }while (retstr && !(*retstr));
1281
1282   return(retstr);
1283 }
1284
1285 /* Mallocing snprintf *
1286  *
1287  * If it overruns size, it will simply be safely truncated.
1288  */
1289 char *
1290 x3_msnprintf(const int size, const char *format, ...)
1291 {
1292     va_list ap;
1293     char* buff = calloc(sizeof(char *), size+1);
1294
1295     va_start(ap, format);
1296     vsnprintf(buff, size, format, ap);
1297     va_end(ap);
1298     buff = realloc(buff, strlen(buff) + 1);
1299     return buff;
1300 }
1301
1302 char *time2str(time_t thetime)
1303 {
1304     char *buf, *tmp;
1305
1306     buf = ctime(&thetime);
1307     tmp = (char *)strchr(buf, '\n');
1308     *tmp = '\0';
1309     return(buf);
1310 }
1311
1312 char* x3_strtok(char **save, char *str, char *fs)
1313 {
1314   char *pos = *save;            /* keep last position across calls */
1315   char *tmp;
1316
1317   if (str)
1318     pos = str;                  /* new string scan */
1319
1320   while (pos && *pos && strchr(fs, *pos) != NULL)
1321     pos++;                      /* skip leading separators */
1322
1323   if (!pos || !*pos)
1324     return (pos = *save = NULL);        /* string contains only sep's */
1325
1326   tmp = pos;                    /* now, keep position of the token */
1327
1328   while (*pos && strchr(fs, *pos) == NULL)
1329     pos++;                      /* skip content of the token */
1330
1331   if (*pos)
1332     *pos++ = '\0';              /* remove first sep after the token */
1333   else
1334     pos = NULL;                 /* end of string */
1335
1336   *save = pos;
1337   return (tmp);
1338 }
1339
1340 int valid_email(const char *email)
1341 {
1342     unsigned int i;
1343     for (i=0;i<strlen(email);i++)
1344     {
1345         if(!isalnum(email[i]) &&
1346                email[i] != '.' &&
1347                email[i] != '@' &&
1348                email[i] != '-' &&
1349                email[i] != '+' &&
1350                email[i] != '_' )
1351             return false;
1352     }
1353     if(strchr(email, '@') == NULL)
1354         return false;
1355     return true;
1356 }
1357
1358 /*
1359  * Create a string of form "foo!bar@fubar" given foo, bar and fubar
1360  * as the parameters.  If NULL, they become "*".
1361  */
1362 #define NUH_BUFSIZE     (NICKLEN + USERLEN + HOSTLEN + 10)
1363 static char *make_nick_user_host(char *namebuf, const char *nick,
1364                                  const char *name, const char *host)
1365 {
1366   snprintf(namebuf, NUH_BUFSIZE, "%s!%s@%s", nick, name, host);
1367   return namebuf;
1368 }
1369
1370 /*
1371  * pretty_mask
1372  *
1373  * by Carlo Wood (Run), 05 Oct 1998.
1374  *
1375  * Canonify a mask.
1376  *
1377  * When the nick is longer then NICKLEN, it is cut off (its an error of course).
1378  * When the user name or host name are too long (USERLEN and HOSTLEN
1379  * respectively) then they are cut off at the start with a '*'.
1380  *
1381  * The following transformations are made:
1382  *
1383  * 1)   xxx             -> nick!*@*
1384  * 2)   xxx.xxx         -> *!*@host
1385  * 3)   xxx!yyy         -> nick!user@*
1386  * 4)   xxx@yyy         -> *!user@host
1387  * 5)   xxx!yyy@zzz     -> nick!user@host
1388  */
1389 char *pretty_mask(char *mask)
1390 {
1391   static char star[2] = { '*', 0 };
1392   static char retmask[NUH_BUFSIZE] = "";
1393   char *last_dot = NULL;
1394   char *ptr = NULL;
1395
1396   /* Case 1: default */
1397   char *nick = mask;
1398   char *user = star;
1399   char *host = star;
1400
1401   /* Do a _single_ pass through the characters of the mask: */
1402   for (ptr = mask; *ptr; ++ptr)
1403   {
1404     if (*ptr == '!')
1405     {
1406       /* Case 3 or 5: Found first '!' (without finding a '@' yet) */
1407       user = ++ptr;
1408       host = star;
1409     }
1410     else if (*ptr == '@')
1411     {
1412       /* Case 4: Found last '@' (without finding a '!' yet) */
1413       nick = star;
1414       user = mask;
1415       host = ++ptr;
1416     }
1417     else if (*ptr == '.')
1418     {
1419       /* Case 2: Found last '.' (without finding a '!' or '@' yet) */
1420       last_dot = ptr;
1421       continue;
1422     }
1423     else
1424       continue;
1425     for (; *ptr; ++ptr)
1426     {
1427       if (*ptr == '@')
1428       {
1429         /* Case 4 or 5: Found last '@' */
1430         host = ptr + 1;
1431       }
1432     }
1433     break;
1434   }
1435   if (user == star && last_dot)
1436   {
1437     /* Case 2: */
1438     nick = star;
1439     user = star;
1440     host = mask;
1441   }
1442   /* Check lengths */
1443   if (nick != star)
1444   {
1445     char *nick_end = (user != star) ? user - 1 : ptr;
1446     if (nick_end - nick > NICKLEN)
1447       nick[NICKLEN] = 0;
1448     *nick_end = 0;
1449   }
1450   if (user != star)
1451   {
1452     char *user_end = (host != star) ? host - 1 : ptr;
1453     if (user_end - user > USERLEN)
1454     {
1455       user = user_end - USERLEN;
1456       *user = '*';
1457     }
1458     *user_end = 0;
1459   }
1460   if (host != star && ptr - host > HOSTLEN)
1461   {
1462     host = ptr - HOSTLEN;
1463     *host = '*';
1464   }
1465   return make_nick_user_host(retmask, nick, user, host);
1466 }
1467
1468 int str_is_number(const char *str)
1469 {
1470     char *ptr;
1471     int ret = false;
1472     for(ptr = (char *)str;*ptr;ptr++) {
1473         if((*ptr >= '0' && *ptr <= '9') || *ptr == '-')
1474             ret = true;
1475         else
1476             return false;
1477     }
1478     return ret;
1479 }