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/*
* ircd-ratbox: A slightly useful ircd.
* m_links.c: Shows what servers are currently connected.
*
* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
* Copyright (C) 1996-2002 Hybrid Development Team
* Copyright (C) 2002-2005 ircd-ratbox development team
*
* 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 "stdinc.h"
#include "client.h"
#include "match.h"
#include "ircd.h"
#include "numeric.h"
#include "s_serv.h"
#include "send.h"
#include "s_conf.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
#include "hook.h"
#include "scache.h"
#include "s_assert.h"
static const char links_desc[] =
"Provides the LINKS command to view servers linked to the host server";
static void m_links(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
static void mo_links(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
static char * clean_string(char *dest, const unsigned char *src, size_t len);
struct Message links_msgtab = {
"LINKS", 0, 0, 0, 0,
{mg_unreg, {m_links, 0}, {mo_links, 0}, mg_ignore, mg_ignore, {mo_links, 0}}
};
int doing_links_hook;
mapi_clist_av1 links_clist[] = { &links_msgtab, NULL };
mapi_hlist_av1 links_hlist[] = {
{ "doing_links", &doing_links_hook },
{ NULL, NULL }
};
DECLARE_MODULE_AV2(links, NULL, NULL, links_clist, links_hlist, NULL, NULL, NULL, links_desc);
/*
* m_links - LINKS message handler
* parv[1] = servername mask
* or
* parv[1] = server to query
* parv[2] = servername mask
*/
static void
m_links(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
if(ConfigServerHide.flatten_links && !IsExemptShide(source_p))
scache_send_flattened_links(source_p);
else
mo_links(msgbuf_p, client_p, source_p, parc, parv);
}
static void
mo_links(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
const char *mask = "";
struct Client *target_p;
char clean_mask[2 * HOSTLEN + 4];
hook_cdata hd;
rb_dlink_node *ptr;
if(parc > 2)
{
if(strlen(parv[2]) > HOSTLEN)
return;
if(hunt_server(client_p, source_p, ":%s LINKS %s :%s", 1, parc, parv)
!= HUNTED_ISME)
return;
mask = parv[2];
}
else if(parc == 2)
mask = parv[1];
if(*mask) /* only necessary if there is a mask */
mask = collapse(clean_string
(clean_mask, (const unsigned char *) mask, 2 * HOSTLEN));
hd.client = source_p;
hd.arg1 = mask;
hd.arg2 = NULL;
call_hook(doing_links_hook, &hd);
RB_DLINK_FOREACH(ptr, global_serv_list.head)
{
target_p = ptr->data;
if(*mask && !match(mask, target_p->name))
continue;
/* We just send the reply, as if theyre here theres either no SHIDE,
* or theyre an oper..
*/
sendto_one_numeric(source_p, RPL_LINKS, form_str(RPL_LINKS),
target_p->name, target_p->servptr->name,
target_p->hopcount,
target_p->info[0] ? target_p->info : "(Unknown Location)");
}
sendto_one_numeric(source_p, RPL_ENDOFLINKS, form_str(RPL_ENDOFLINKS),
EmptyString(mask) ? "*" : mask);
}
static char *
clean_string(char *dest, const unsigned char *src, size_t len)
{
char *d = dest;
s_assert(0 != dest);
s_assert(0 != src);
if(dest == NULL || src == NULL)
return NULL;
while (*src && (len > 1))
{
if(*src & 0x80) /* if high bit is set */
{
*d++ = '.';
--len;
if(len <= 1)
break;
}
else if(!IsPrint(*src)) /* if NOT printable */
{
*d++ = '^';
--len;
if(len <= 1)
break;
*d++ = 0x40 + *src; /* turn it into a printable */
}
else
*d++ = *src;
++src;
--len;
}
*d = '\0';
return dest;
}
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