misc.c

/*
 * Copyright (C) 2000,2001  Florian Sander
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

/* maskstricthost():
 * basically the same as maskhost() from src/misc.c, but _never_ strips
 * "~+-^=" off the host
 */
static void maskstricthost(const char *s, char *nw)
{
  const char *p, *q, *e, *f;
  int i;

  *nw++ = '*';
  *nw++ = '!';
  p = (q = strchr(s, '!')) ? q + 1 : s;
  /* Strip of any nick, if a username is found, use last 8 chars */
  if ((q = strchr(p, '@'))) {
    int fl = 0;

    if ((q - p) > 9) {
      nw[0] = '*';
      p = q - 7;
      i = 1;
    } else
      i = 0;
    while (*p != '@') {
      if (!fl && strchr("~+-^=", *p)) {
//        if (strict_host)
      nw[i] = '?';
//    else
//      i--;
      } else
    nw[i] = *p;
      fl++;
      p++;
      i++;
    }
    nw[i++] = '@';
    q++;
  } else {
    nw[0] = '*';
    nw[1] = '@';
    i = 2;
    q = s;
  }
  nw += i;
  e = NULL;
  /* Now q points to the hostname, i point to where to put the mask */
  if ((!(p = strchr(q, '.')) || !(e = strchr(p + 1, '.'))) && !strchr(q, ':'))
    /* TLD or 2 part host */
    strcpy(nw, q);
  else {
    if (e == NULL) {        /* IPv6 address?        */
      const char *mask_str;

      f = strrchr(q, ':');
      if (strchr(f, '.')) { /* IPv4 wrapped in an IPv6? */
    f = strrchr(f, '.');
    mask_str = ".*";
      } else            /* ... no, true IPv6.       */
    mask_str = ":*";
      strncpy(nw, q, f - q);
      /* No need to nw[f-q] = 0 here, as the strcpy below will
       * terminate the string for us.
       */
      nw += (f - q);
      strcpy(nw, mask_str);
    } else {
      for (f = e; *f; f++);
      f--;
      if (*f >= '0' && *f <= '9') { /* Numeric IP address */
    while (*f != '.')
      f--;
    strncpy(nw, q, f - q);
    /* No need to nw[f-q] = 0 here, as the strcpy below will
     * terminate the string for us.
     */
    nw += (f - q);
    strcpy(nw, ".*");
      } else {              /* Normal host >= 3 parts */
    /*    a.b.c  -> *.b.c
     *    a.b.c.d ->  *.b.c.d if tld is a country (2 chars)
     *             OR   *.c.d if tld is com/edu/etc (3 chars)
     *    a.b.c.d.e -> *.c.d.e   etc
     */
    const char *x = strchr(e + 1, '.');

    if (!x)
      x = p;
    else if (strchr(x + 1, '.'))
      x = e;
    else if (strlen(x) == 3)
      x = p;
    else
      x = e;
    sprintf(nw, "*%s", x);
      }
    }
  }
}