mirror of
https://github.com/matrix-construct/construct
synced 2024-12-25 06:53:58 +01:00
172 lines
4.6 KiB
C
172 lines
4.6 KiB
C
/* $Id: ip_cloaking_old.c 3522 2007-07-06 07:48:28Z nenolod $ */
|
|
|
|
#include "stdinc.h"
|
|
#include "modules.h"
|
|
#include "hook.h"
|
|
#include "client.h"
|
|
#include "ircd.h"
|
|
#include "send.h"
|
|
#include "s_conf.h"
|
|
#include "s_user.h"
|
|
#include "s_serv.h"
|
|
#include "numeric.h"
|
|
|
|
/* if you're modifying this module, you'll probably to change this */
|
|
#define KEY 0x13748cfa
|
|
|
|
static int
|
|
_modinit(void)
|
|
{
|
|
/* add the usermode to the available slot */
|
|
user_modes['h'] = find_umode_slot();
|
|
construct_umodebuf();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
_moddeinit(void)
|
|
{
|
|
/* disable the umode and remove it from the available list */
|
|
user_modes['h'] = 0;
|
|
construct_umodebuf();
|
|
}
|
|
|
|
static void check_umode_change(void *data);
|
|
static void check_new_user(void *data);
|
|
mapi_hfn_list_av1 ip_cloaking_hfnlist[] = {
|
|
{ "umode_changed", (hookfn) check_umode_change },
|
|
{ "new_local_user", (hookfn) check_new_user },
|
|
{ NULL, NULL }
|
|
};
|
|
|
|
DECLARE_MODULE_AV1(ip_cloaking, _modinit, _moddeinit, NULL, NULL,
|
|
ip_cloaking_hfnlist, "$Revision: 3522 $");
|
|
|
|
static void
|
|
distribute_hostchange(struct Client *client)
|
|
{
|
|
if (irccmp(client->host, client->orighost))
|
|
sendto_one_numeric(client, RPL_HOSTHIDDEN, "%s :is now your hidden host",
|
|
client->host);
|
|
else
|
|
sendto_one_numeric(client, RPL_HOSTHIDDEN, "%s :hostname reset",
|
|
client->host);
|
|
|
|
sendto_server(NULL, NULL,
|
|
CAP_EUID | CAP_TS6, NOCAPS, ":%s CHGHOST %s :%s",
|
|
use_id(&me), use_id(client), client->host);
|
|
sendto_server(NULL, NULL,
|
|
CAP_TS6, CAP_EUID, ":%s ENCAP * CHGHOST %s :%s",
|
|
use_id(&me), use_id(client), client->host);
|
|
if (irccmp(client->host, client->orighost))
|
|
SetDynSpoof(client);
|
|
else
|
|
ClearDynSpoof(client);
|
|
}
|
|
|
|
static void
|
|
do_host_cloak(const char *inbuf, char *outbuf, int ipmask)
|
|
{
|
|
int cyc;
|
|
unsigned int hosthash = 1, hosthash2 = 1;
|
|
unsigned int maxcycle = strlen(inbuf);
|
|
int len1;
|
|
const char *rest, *next;
|
|
|
|
for (cyc = 0; cyc < maxcycle - 2; cyc += 2)
|
|
hosthash *= (unsigned int) inbuf[cyc];
|
|
|
|
/* safety: decrement ourselves two steps back */
|
|
for (cyc = maxcycle - 1; cyc >= 1; cyc -= 2)
|
|
hosthash2 *= (unsigned int) inbuf[cyc];
|
|
|
|
/* lets do some bitshifting -- this pretty much destroys the IP
|
|
* sequence, while still providing a checksum. exactly what
|
|
* we're shooting for. --nenolod
|
|
*/
|
|
hosthash += (hosthash2 / KEY);
|
|
hosthash2 += (hosthash / KEY);
|
|
|
|
if (ipmask == 0)
|
|
{
|
|
rb_snprintf(outbuf, HOSTLEN, "%s-%X%X",
|
|
ServerInfo.network_name, hosthash2, hosthash);
|
|
len1 = strlen(outbuf);
|
|
rest = strchr(inbuf, '.');
|
|
if (rest == NULL)
|
|
rest = ".";
|
|
/* try to avoid truncation -- jilles */
|
|
while (len1 + strlen(rest) >= HOSTLEN && (next = strchr(rest + 1, '.')) != NULL)
|
|
rest = next;
|
|
rb_strlcat(outbuf, rest, HOSTLEN);
|
|
}
|
|
else
|
|
rb_snprintf(outbuf, HOSTLEN, "%X%X.%s",
|
|
hosthash2, hosthash, ServerInfo.network_name);
|
|
}
|
|
|
|
static void
|
|
check_umode_change(void *vdata)
|
|
{
|
|
hook_data_umode_changed *data = (hook_data_umode_changed *)vdata;
|
|
struct Client *source_p = data->client;
|
|
|
|
if (!MyClient(source_p))
|
|
return;
|
|
|
|
/* didn't change +h umode, we don't need to do anything */
|
|
if (!((data->oldumodes ^ source_p->umodes) & user_modes['h']))
|
|
return;
|
|
|
|
if (source_p->umodes & user_modes['h'])
|
|
{
|
|
if (IsIPSpoof(source_p) || source_p->localClient->mangledhost == NULL || (IsDynSpoof(source_p) && strcmp(source_p->host, source_p->localClient->mangledhost)))
|
|
{
|
|
source_p->umodes &= ~user_modes['h'];
|
|
return;
|
|
}
|
|
if (strcmp(source_p->host, source_p->localClient->mangledhost))
|
|
{
|
|
rb_strlcpy(source_p->host, source_p->localClient->mangledhost, HOSTLEN);
|
|
distribute_hostchange(source_p);
|
|
}
|
|
else /* not really nice, but we need to send this numeric here */
|
|
sendto_one_numeric(source_p, RPL_HOSTHIDDEN, "%s :is now your hidden host",
|
|
source_p->host);
|
|
}
|
|
else if (!(source_p->umodes & user_modes['h']))
|
|
{
|
|
if (source_p->localClient->mangledhost != NULL &&
|
|
!strcmp(source_p->host, source_p->localClient->mangledhost))
|
|
{
|
|
rb_strlcpy(source_p->host, source_p->orighost, HOSTLEN);
|
|
distribute_hostchange(source_p);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
check_new_user(void *vdata)
|
|
{
|
|
struct Client *source_p = (void *)vdata;
|
|
|
|
if (IsIPSpoof(source_p))
|
|
{
|
|
source_p->umodes &= ~user_modes['h'];
|
|
return;
|
|
}
|
|
source_p->localClient->mangledhost = rb_malloc(HOSTLEN);
|
|
if (!irccmp(source_p->orighost, source_p->sockhost))
|
|
do_host_cloak(source_p->orighost, source_p->localClient->mangledhost, 1);
|
|
else
|
|
do_host_cloak(source_p->orighost, source_p->localClient->mangledhost, 0);
|
|
if (IsDynSpoof(source_p))
|
|
source_p->umodes &= ~user_modes['h'];
|
|
if (source_p->umodes & user_modes['h'])
|
|
{
|
|
rb_strlcpy(source_p->host, source_p->localClient->mangledhost, sizeof(source_p->host));
|
|
if (irccmp(source_p->host, source_p->orighost))
|
|
SetDynSpoof(source_p);
|
|
}
|
|
}
|