| 1 |
/* MODULE CONFIGURATION FOLLOWS -- please read!! */
|
| 2 |
|
| 3 |
/* Change these numbers to something else. Please
|
| 4 |
* make sure that they match on ALL servers
|
| 5 |
* to avoid problems!
|
| 6 |
*/
|
| 7 |
#define KEY 23857
|
| 8 |
#define KEY2 38447
|
| 9 |
#define KEY3 64709
|
| 10 |
|
| 11 |
/* END OF MODULE CONFIGURATION */
|
| 12 |
|
| 13 |
/*
|
| 14 |
* ircd-hybrid: an advanced Internet Relay Chat Daemon (ircd).
|
| 15 |
* ip_cloaking.c: Provides hostname (partial) cloaking for clients.
|
| 16 |
*
|
| 17 |
* Copyright (c) 2005 by the past and present ircd coders, and others.
|
| 18 |
*
|
| 19 |
* This program is free software; you can redistribute it and/or modify
|
| 20 |
* it under the terms of the GNU General Public License as published by
|
| 21 |
* the Free Software Foundation; either version 2 of the License, or
|
| 22 |
* (at you option) any later version.
|
| 23 |
*
|
| 24 |
* This program is distributed in the hope that it will be useful,
|
| 25 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 26 |
* MERCHANTABILILTY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
| 27 |
* GNU General Public License for more details.
|
| 28 |
*
|
| 29 |
* You should have recieved a copy of the GNU General Public License
|
| 30 |
* along with this program; if not, write to the Free Software
|
| 31 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
|
| 32 |
* USA
|
| 33 |
*
|
| 34 |
* $Id: ip_cloaking.c 801 2006-08-30 16:54:25Z adx $
|
| 35 |
*/
|
| 36 |
|
| 37 |
/*
|
| 38 |
* Originally re-written from AustNet's VirtualWorld Code.
|
| 39 |
* Virtual World written by Roger 'RogerY' Yerramesetti <rogery@austnet.org>
|
| 40 |
*
|
| 41 |
* Re-written using the crc32 encryption implementation by //ylo based on the original
|
| 42 |
* implementation by Gary S. Brown.
|
| 43 |
*
|
| 44 |
* HiddenHost implementation based on the code from Unreal IRCd by
|
| 45 |
* RaYmAn, NiQuiL, narf, Griever (great thinking) eternal, bball, JK.@ roxnet.org
|
| 46 |
*
|
| 47 |
* Additional ideas and code by ShadowMaster, [-Th3Dud3-] (RageIRCd), Solaris @ Demonkarma.net,
|
| 48 |
* Alan 'knight-' LeVee of the ChatJunkies IRC Network and doughk_ff7.
|
| 49 |
*/
|
| 50 |
|
| 51 |
#include "stdinc.h"
|
| 52 |
#include "conf/modules.h"
|
| 53 |
#include "ircd_defs.h"
|
| 54 |
#include "whowas.h"
|
| 55 |
#include "channel.h"
|
| 56 |
#include "channel_mode.h"
|
| 57 |
#include "client.h"
|
| 58 |
#include "common.h"
|
| 59 |
#include "hash.h"
|
| 60 |
#include "ircd.h"
|
| 61 |
#include "numeric.h"
|
| 62 |
#include "server.h"
|
| 63 |
#include "user.h"
|
| 64 |
#include "send.h"
|
| 65 |
#include "userhost.h"
|
| 66 |
|
| 67 |
static unsigned int umode_vhost = 0;
|
| 68 |
static int vhost_ipv6_err;
|
| 69 |
static dlink_node *prev_enter_umode;
|
| 70 |
static dlink_node *prev_umode;
|
| 71 |
|
| 72 |
static void *reset_ipv6err_flag(va_list);
|
| 73 |
static void *h_set_user_mode(va_list);
|
| 74 |
|
| 75 |
INIT_MODULE(ip_cloaking, "$Revision: 33 $")
|
| 76 |
{
|
| 77 |
if (!user_modes['h'])
|
| 78 |
{
|
| 79 |
unsigned int all_umodes = 0, i;
|
| 80 |
|
| 81 |
for (i = 0; i < 128; i++)
|
| 82 |
all_umodes |= user_modes[i];
|
| 83 |
|
| 84 |
for (umode_vhost = 1; umode_vhost && (all_umodes & umode_vhost);
|
| 85 |
umode_vhost <<= 1);
|
| 86 |
|
| 87 |
if (!umode_vhost)
|
| 88 |
{
|
| 89 |
ilog(L_ERROR, "You have more than 32 usermodes, "
|
| 90 |
"IP cloaking not installed");
|
| 91 |
sendto_realops_flags(UMODE_ALL, L_ALL, "You have more than "
|
| 92 |
"32 usermodes, IP cloaking not installed");
|
| 93 |
return;
|
| 94 |
}
|
| 95 |
|
| 96 |
user_modes['h'] = umode_vhost;
|
| 97 |
assemble_umode_buffer();
|
| 98 |
}
|
| 99 |
else
|
| 100 |
{
|
| 101 |
ilog(L_ERROR, "Usermode +h already in use, IP cloaking not installed");
|
| 102 |
sendto_realops_flags(UMODE_ALL, L_ALL, "Usermode +h already in use, "
|
| 103 |
"IP cloaking not installed");
|
| 104 |
return;
|
| 105 |
}
|
| 106 |
|
| 107 |
prev_enter_umode = install_hook(entering_umode_cb, reset_ipv6err_flag);
|
| 108 |
prev_umode = install_hook(umode_cb, h_set_user_mode);
|
| 109 |
}
|
| 110 |
|
| 111 |
CLEANUP_MODULE
|
| 112 |
{
|
| 113 |
if (umode_vhost)
|
| 114 |
{
|
| 115 |
dlink_node *ptr;
|
| 116 |
|
| 117 |
DLINK_FOREACH(ptr, local_client_list.head)
|
| 118 |
{
|
| 119 |
struct Client *cptr = ptr->data;
|
| 120 |
cptr->umodes &= ~umode_vhost;
|
| 121 |
}
|
| 122 |
|
| 123 |
user_modes['h'] = 0;
|
| 124 |
assemble_umode_buffer();
|
| 125 |
|
| 126 |
uninstall_hook(entering_umode_cb, reset_ipv6err_flag);
|
| 127 |
uninstall_hook(umode_cb, h_set_user_mode);
|
| 128 |
}
|
| 129 |
}
|
| 130 |
|
| 131 |
/*
|
| 132 |
* The implementation originally comes from Gary S. Brown. The tables
|
| 133 |
* are a direct transplant of his original concept and have been
|
| 134 |
* changed for randomization purposes. Minor changes were also made
|
| 135 |
* to the crc32-function by //ylo.
|
| 136 |
*
|
| 137 |
* knight-
|
| 138 |
*/
|
| 139 |
|
| 140 |
/* =============================================================
|
| 141 |
* COPYRIGHT (C) 1986 Gary S. Brown. You may use this program, or
|
| 142 |
* code or tables extracted from it, as desired without restriction.
|
| 143 |
*
|
| 144 |
* First, the polynomial itself and its stable of feedback terms. The
|
| 145 |
* polynomial is:
|
| 146 |
*
|
| 147 |
* X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0
|
| 148 |
*
|
| 149 |
* Note that we take it "backwards" and put the highest-order term in
|
| 150 |
* the lowest-order bit. The X^32 term is "implied"; the LSB is the
|
| 151 |
* X^31 term, etc. The X^0 term (usually shown as "+1") results in
|
| 152 |
* the MSB being 1.
|
| 153 |
*
|
| 154 |
* Note that the usual hardware shift register implementation, which
|
| 155 |
* is what we're using (we're merely optimizing it by doing eight-bit
|
| 156 |
* chunks at a time) shifts bits into the lowest-order term. In our
|
| 157 |
* implementation, that means shifting towards the right. Why do we
|
| 158 |
* do it this way? Because the calculated CRC must be transmitted in
|
| 159 |
* order from highest-order term to lowest-order term. UARTs transmit
|
| 160 |
* characters in order from LSB to MSB. By storing the CRC this way,
|
| 161 |
* we and it to the UART in the order low-byte to high-byte; the UART
|
| 162 |
* sends each low-bit to high-bit; and the result is transmission bit
|
| 163 |
* by bit from highest-order to lowest-order term without requiring any
|
| 164 |
* bit shuffling on our part. Reception works similarly.
|
| 165 |
*
|
| 166 |
* The feedback term table consists of 256, 32-bit entries. Notes:
|
| 167 |
*
|
| 168 |
* The table can be generated at runtime if desired; code to do so
|
| 169 |
* is shown later. It might not be obvious, but the feedback terms
|
| 170 |
* simply represent the results of eight shift/xor operations for
|
| 171 |
* all combinations of data and CRC register values.
|
| 172 |
*
|
| 173 |
* The values must be right shifted by eight bits by the "updcrc"
|
| 174 |
* logic; the shift must be unsigned (bring in zeroes). On some hardware
|
| 175 |
* you could probably optimize the shift in assembler by using byte-swap
|
| 176 |
* instructions.
|
| 177 |
*
|
| 178 |
* polynomial $edb88320
|
| 179 |
*
|
| 180 |
* --------------------------------------------------------------------
|
| 181 |
*/
|
| 182 |
|
| 183 |
static unsigned long crc32_tab[] = {
|
| 184 |
0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
|
| 185 |
0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
|
| 186 |
0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
|
| 187 |
0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
|
| 188 |
0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
|
| 189 |
0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
|
| 190 |
0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
|
| 191 |
0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
|
| 192 |
0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
|
| 193 |
0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
|
| 194 |
0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
|
| 195 |
0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
|
| 196 |
0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
|
| 197 |
0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
|
| 198 |
0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
|
| 199 |
0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
|
| 200 |
0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
|
| 201 |
0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
|
| 202 |
0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
|
| 203 |
0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
|
| 204 |
0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
|
| 205 |
0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
|
| 206 |
0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
|
| 207 |
0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
|
| 208 |
0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
|
| 209 |
0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
|
| 210 |
0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
|
| 211 |
0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
|
| 212 |
0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
|
| 213 |
0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
|
| 214 |
0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
|
| 215 |
0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
|
| 216 |
0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
|
| 217 |
0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
|
| 218 |
0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
|
| 219 |
0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
|
| 220 |
0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
|
| 221 |
0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
|
| 222 |
0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
|
| 223 |
0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
|
| 224 |
0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
|
| 225 |
0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
|
| 226 |
0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
|
| 227 |
0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
|
| 228 |
0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
|
| 229 |
0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
|
| 230 |
0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
|
| 231 |
0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
|
| 232 |
0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
|
| 233 |
0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
|
| 234 |
0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
|
| 235 |
0x2d02ef8dL
|
| 236 |
};
|
| 237 |
|
| 238 |
static unsigned long
|
| 239 |
crc32 (const unsigned char *s, unsigned int len)
|
| 240 |
{
|
| 241 |
unsigned int i;
|
| 242 |
unsigned long crc32val;
|
| 243 |
|
| 244 |
crc32val = 0;
|
| 245 |
for (i = 0; i < len; i++)
|
| 246 |
{
|
| 247 |
crc32val = crc32_tab[(crc32val ^ s[i]) & 0xff] ^ (crc32val >> 8);
|
| 248 |
}
|
| 249 |
return crc32val;
|
| 250 |
}
|
| 251 |
|
| 252 |
/*
|
| 253 |
* str2arr()
|
| 254 |
*
|
| 255 |
* converts IPv4 address segments into arrays
|
| 256 |
* for encryption
|
| 257 |
*
|
| 258 |
* inputs - address parvs, strings and deliminator
|
| 259 |
* outputs - array
|
| 260 |
* side effects - not IPv6 friendly
|
| 261 |
*/
|
| 262 |
static int
|
| 263 |
str2arr (char **pparv, char *string, char *delim)
|
| 264 |
{
|
| 265 |
char *tok;
|
| 266 |
int pparc = 0;
|
| 267 |
|
| 268 |
/* Diane had suggested to use this method rather than while() -- knight */
|
| 269 |
for (tok = strtok (string, delim); tok != NULL; tok = strtok (NULL, delim))
|
| 270 |
{
|
| 271 |
pparv[pparc++] = tok;
|
| 272 |
}
|
| 273 |
|
| 274 |
return pparc;
|
| 275 |
}
|
| 276 |
|
| 277 |
/*
|
| 278 |
* make_virthost()
|
| 279 |
*
|
| 280 |
* curr = current hostname/ip
|
| 281 |
* host = current host socket
|
| 282 |
* new = encrypted hostname/ip
|
| 283 |
*/
|
| 284 |
static void
|
| 285 |
make_virthost (char *curr, char *host, char *new)
|
| 286 |
{
|
| 287 |
static char mask[HOSTLEN + 1];
|
| 288 |
char *parv[HOSTLEN + 1], *parv2[HOSTLEN + 1], s[HOSTLEN + 1], s2[HOSTLEN + 1];
|
| 289 |
int parc = 0, parc2 = 0, len = 0;
|
| 290 |
unsigned long hash[8];
|
| 291 |
|
| 292 |
strlcpy(s2, curr, HOSTLEN + 1);
|
| 293 |
strlcpy(s, host, HOSTLEN + 1);
|
| 294 |
|
| 295 |
if (!parc2)
|
| 296 |
return;
|
| 297 |
|
| 298 |
parc = str2arr(parv, s, ".");
|
| 299 |
parc2 = str2arr(parv2, s2, ".");
|
| 300 |
|
| 301 |
hash[0] = ((crc32 (parv[3], strlen (parv[3])) + KEY) ^ KEY2) ^ KEY3;
|
| 302 |
hash[1] = ((KEY2 ^ crc32 (parv[2], strlen (parv[2]))) + KEY3) ^ KEY;
|
| 303 |
hash[2] = ((crc32 (parv[1], strlen (parv[1])) + KEY3) ^ KEY) ^ KEY2;
|
| 304 |
hash[3] = ((KEY3 ^ crc32 (parv[0], strlen (parv[0]))) + KEY2) ^ KEY;
|
| 305 |
|
| 306 |
hash[0] <<= 2;
|
| 307 |
hash[0] >>= 2;
|
| 308 |
hash[0] &= 0x3FFFFFFF;
|
| 309 |
hash[0] &= 0xFFFFFFFF;
|
| 310 |
hash[1] <<= 2;
|
| 311 |
hash[1] >>= 2;
|
| 312 |
hash[1] &= 0x7FFFFFFF;
|
| 313 |
hash[1] &= 0x3FFFFFFF;
|
| 314 |
hash[2] <<= 2;
|
| 315 |
hash[2] >>= 2;
|
| 316 |
hash[2] &= 0x7FFFFFFF;
|
| 317 |
hash[2] &= 0xFFFFFFFF;
|
| 318 |
hash[3] <<= 2;
|
| 319 |
hash[3] >>= 2;
|
| 320 |
hash[3] &= 0x3FFFFFFF;
|
| 321 |
hash[3] &= 0x7FFFFFFF;
|
| 322 |
|
| 323 |
/* IPv4 */
|
| 324 |
if (parc2 == 4 || parc2 < 2)
|
| 325 |
{
|
| 326 |
len = strlen (parv2[3]);
|
| 327 |
|
| 328 |
if (strchr("0123456789", parv2[3][len - 1]) || parc2 < 2)
|
| 329 |
{
|
| 330 |
ircsprintf(mask, "%s.%s.%s.%lx",
|
| 331 |
parv2[parc2 - 4], parv2[parc2 - 3],
|
| 332 |
parv2[parc2 - 2], hash[3]);
|
| 333 |
}
|
| 334 |
else
|
| 335 |
{
|
| 336 |
/* isp.tld */
|
| 337 |
ircsprintf(mask, "%lx-%lx.%s.%s",
|
| 338 |
hash[0], hash[3], parv2[parc2 - 2], parv2[parc2 - 1]);
|
| 339 |
}
|
| 340 |
}
|
| 341 |
else
|
| 342 |
{
|
| 343 |
if (parc2 >= 4)
|
| 344 |
{
|
| 345 |
/* isp.sub.tld or district.isp.tld */
|
| 346 |
ircsprintf(mask, "%lx-%lx.%s.%s.%s",
|
| 347 |
hash[3], hash[1], parv2[parc2 - 3], parv2[parc2 - 2],
|
| 348 |
parv2[parc2 - 1]);
|
| 349 |
}
|
| 350 |
else
|
| 351 |
{
|
| 352 |
/* isp.tld */
|
| 353 |
ircsprintf(mask, "%lx-%lx.%s.%s",
|
| 354 |
hash[0], hash[3], parv2[parc2 - 2], parv2[parc2 - 1]);
|
| 355 |
}
|
| 356 |
|
| 357 |
if (parc2 >= 5)
|
| 358 |
{
|
| 359 |
/* zone.district.isp.tld or district.isp.sub.tld */
|
| 360 |
ircsprintf(mask, "%lx-%lx.%s.%s.%s.%s",
|
| 361 |
hash[1], hash[0], parv2[parc2 - 4], parv2[parc2 - 3],
|
| 362 |
parv2[parc2 - 2], parv2[parc2 - 1]);
|
| 363 |
}
|
| 364 |
else
|
| 365 |
{
|
| 366 |
/* isp.tld */
|
| 367 |
ircsprintf(mask, "%lx-%lx.%s.%s",
|
| 368 |
hash[0], hash[3], parv2[parc2 - 2], parv2[parc2 - 1]);
|
| 369 |
}
|
| 370 |
}
|
| 371 |
|
| 372 |
strlcpy(new, mask, HOSTLEN + 1);
|
| 373 |
}
|
| 374 |
|
| 375 |
/*
|
| 376 |
* set_vhost()
|
| 377 |
*
|
| 378 |
* inputs - pointer to given client to set IP cloak.
|
| 379 |
* outputs - NONE
|
| 380 |
* side effects - NONE
|
| 381 |
*/
|
| 382 |
static void
|
| 383 |
set_vhost(struct Client *client_p, struct Client *source_p,
|
| 384 |
struct Client *target_p)
|
| 385 |
{
|
| 386 |
target_p->umodes |= umode_vhost;
|
| 387 |
|
| 388 |
delete_user_host(target_p->username, target_p->host, !MyConnect(target_p));
|
| 389 |
make_virthost(target_p->host, target_p->sockhost, target_p->host);
|
| 390 |
add_user_host(target_p->username, target_p->host, !MyConnect(target_p));
|
| 391 |
|
| 392 |
SetIPSpoof(target_p);
|
| 393 |
|
| 394 |
if (IsClient(target_p))
|
| 395 |
sendto_server(client_p, source_p, NULL, CAP_ENCAP, NOCAPS,
|
| 396 |
":%s ENCAP * CHGHOST %s %s",
|
| 397 |
me.name, target_p->name, target_p->host);
|
| 398 |
|
| 399 |
sendto_one(target_p, form_str(RPL_HOSTHIDDEN),
|
| 400 |
me.name, target_p->name, target_p->host);
|
| 401 |
}
|
| 402 |
|
| 403 |
static void *
|
| 404 |
reset_ipv6err_flag(va_list args)
|
| 405 |
{
|
| 406 |
struct Client *client_p = va_arg(args, struct Client *);
|
| 407 |
struct Client *source_p = va_arg(args, struct Client *);
|
| 408 |
|
| 409 |
vhost_ipv6_err = NO;
|
| 410 |
|
| 411 |
return pass_callback(prev_enter_umode, client_p, source_p);
|
| 412 |
}
|
| 413 |
|
| 414 |
static void *
|
| 415 |
h_set_user_mode(va_list args)
|
| 416 |
{
|
| 417 |
struct Client *client_p = va_arg(args, struct Client *);
|
| 418 |
struct Client *target_p = va_arg(args, struct Client *);
|
| 419 |
int what = va_arg(args, int);
|
| 420 |
unsigned int flag = va_arg(args, unsigned int);
|
| 421 |
|
| 422 |
if (flag == umode_vhost)
|
| 423 |
{
|
| 424 |
if (what == MODE_ADD)
|
| 425 |
{
|
| 426 |
/* Automatically break if any of these conditions are met. -- knight- */
|
| 427 |
if (!MyConnect(target_p))
|
| 428 |
return NULL;
|
| 429 |
|
| 430 |
if (IsIPSpoof(target_p))
|
| 431 |
return NULL;
|
| 432 |
|
| 433 |
/*
|
| 434 |
* IPv6 could potentially core the server if a user connected via IPv6 sets +h
|
| 435 |
* so we need to check and break before that happens. -- knight-
|
| 436 |
*/
|
| 437 |
#ifdef IPV6
|
| 438 |
if (target_p->localClient->aftype == AF_INET6)
|
| 439 |
{
|
| 440 |
if (!vhost_ipv6_err)
|
| 441 |
{
|
| 442 |
sendto_one(target_p, ":%s NOTICE %s :*** Sorry, IP cloaking "
|
| 443 |
"does not support IPv6 users!", me.name, target_p->name);
|
| 444 |
vhost_ipv6_err = YES;
|
| 445 |
}
|
| 446 |
}
|
| 447 |
else
|
| 448 |
#endif
|
| 449 |
set_vhost(client_p, target_p, target_p);
|
| 450 |
}
|
| 451 |
|
| 452 |
return NULL;
|
| 453 |
}
|
| 454 |
|
| 455 |
return pass_callback(prev_umode, client_p, target_p, what, flag);
|
| 456 |
}
|
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