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/*
masks.c : irssi
Copyright (C) 1999-2000 Timo Sirainen
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
*/
#include "module.h"
#include "network.h"
#include "irc-masks.h"
static char *get_domain_mask(char *host)
{
char *ptr;
if (strchr(host, '.') == NULL) {
/* no dots - toplevel domain or IPv6 address */
ptr = strrchr(host, ':');
if (ptr != NULL) {
/* IPv6 address, ban the last 64k addresses */
if (ptr[1] != '\0') strcpy(ptr+1, "*");
}
return host;
}
if (is_ipv4_address(host)) {
/* it's an IP address, change last digit to * */
ptr = strrchr(host, '.');
if (ptr != NULL && isdigit(ptr[1]))
strcpy(ptr+1, "*");
} else {
/* if more than one dot, skip the first
(dyn123.blah.net -> *.blah.net) */
ptr = strchr(host, '.');
if (ptr != NULL && strchr(ptr+1, '.') != NULL) {
host = ptr-1;
host[0] = '*';
}
}
return host;
}
char *irc_get_mask(const char *nick, const char *address, int flags)
{
char *ret, *user, *host;
/* strip -, ^ or ~ from start.. */
user = g_strconcat("*", ishostflag(*address) ?
address+1 : address, NULL);
/* split user and host */
host = strchr(user, '@');
if (host == NULL) {
g_free(user);
return NULL;
}
*host++ = '\0';
if (flags & IRC_MASK_HOST) {
/* we already have the host */
} else if (flags & IRC_MASK_DOMAIN) {
/* domain - *.blah.org */
host = get_domain_mask(host);
} else {
/* no domain/host */
host = "*";
}
ret = g_strdup_printf("%s!%s@%s",
(flags & IRC_MASK_NICK) ? nick : "*",
(flags & IRC_MASK_USER) ? user : "*",
host);
g_free(user);
return ret;
}
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