angiosperm/modules/m_links.c
Elizabeth Myers 3c7d6fcce7 Message handlers should return void.
Also fix up some return values and stuff to use bool (or void if
nothing). I just did it whilst I was here.

According to jilles, the return value used to signify whether or not the
client had exited. This was error-prone and was fixed a long, long time
ago, but the return value was left int for historical reasons.

Since the return type is not used (and has no clear use case anyway),
it's safe to just get rid of it.
2016-03-09 01:37:03 -06:00

165 lines
4.2 KiB
C

/*
* 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;
}