modules/m_links.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_links.c: Shows what servers are currently connected.
   4  *
   5  *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
   6  *  Copyright (C) 1996-2002 Hybrid Development Team
   7  *  Copyright (C) 2002-2005 ircd-ratbox development team
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  22  *  USA
  23  *
  24  *  $Id: m_links.c 21142 2005-11-08 22:28:36Z leeh $
  25  */
  26
  27 #include "stdinc.h"
  28 #include "client.h"
  29 #include "irc_string.h"
  30 #include "ircd.h"
  31 #include "numeric.h"
  32 #include "s_serv.h"
  33 #include "send.h"
  34 #include "s_conf.h"
  35 #include "msg.h"
  36 #include "parse.h"
  37 #include "modules.h"
  38 #include "hook.h"
  39 #include "cache.h"
  40
  41 static int m_links(struct Client *, struct Client *, int, const char **);
  42 static int mo_links(struct Client *, struct Client *, int, const char **);
  43
  44 struct Message links_msgtab = {
  45         "LINKS", 0, 0, 0, MFLG_SLOW,
  46         {mg_unreg, {m_links, 0}, {mo_links, 0}, mg_ignore, mg_ignore, {mo_links, 0}}
  47 };
  48
  49 int doing_links_hook;
  50
  51 mapi_clist_av1 links_clist[] = { &links_msgtab, NULL };
  52 mapi_hlist_av1 links_hlist[] = {
  53         { "doing_links",        &doing_links_hook },
  54         { NULL, NULL }
  55 };
  56
  57 DECLARE_MODULE_AV1(links, NULL, NULL, links_clist, links_hlist, NULL, "$Revision: 21142 $");
  58
  59 static void send_links_cache(struct Client *source_p);
  60
  61 /*
  62  * m_links - LINKS message handler
  63  *      parv[0] = sender prefix
  64  *      parv[1] = servername mask
  65  * or
  66  *      parv[0] = sender prefix
  67  *      parv[1] = server to query
  68  *      parv[2] = servername mask
  69  */
  70 static int
  71 m_links(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  72 {
  73         if(ConfigServerHide.flatten_links && !IsExemptShide(source_p))
  74                 send_links_cache(source_p);
  75         else
  76                 mo_links(client_p, source_p, parc, parv);
  77
  78         return 0;
  79 }
  80
  81 static int
  82 mo_links(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  83 {
  84         const char *mask = "";
  85         struct Client *target_p;
  86         char clean_mask[2 * HOSTLEN + 4];
  87         hook_data hd;
  88
  89         dlink_node *ptr;
  90
  91         if(parc > 2)
  92         {
  93                 if(hunt_server(client_p, source_p, ":%s LINKS %s :%s", 1, parc, parv)
  94                    != HUNTED_ISME)
  95                         return 0;
  96
  97                 mask = parv[2];
  98         }
  99         else if(parc == 2)
 100                 mask = parv[1];
 101
 102         if(*mask)               /* only necessary if there is a mask */
 103                 mask = collapse(clean_string
 104                                 (clean_mask, (const unsigned char *) mask, 2 * HOSTLEN));
 105
 106         hd.client = source_p;
 107         hd.arg1 = mask;
 108         hd.arg2 = NULL;
 109
 110         call_hook(doing_links_hook, &hd);
 111
 112         DLINK_FOREACH(ptr, global_serv_list.head)
 113         {
 114                 target_p = ptr->data;
 115
 116                 if(*mask && !match(mask, target_p->name))
 117                         continue;
 118
 119                 /* We just send the reply, as if theyre here theres either no SHIDE,
 120                  * or theyre an oper..
 121                  */
 122                 sendto_one_numeric(source_p, RPL_LINKS, form_str(RPL_LINKS),
 123                                    target_p->name, target_p->servptr->name,
 124                                    target_p->hopcount,
 125                                    target_p->info[0] ? target_p->info : "(Unknown Location)");
 126         }
 127
 128         sendto_one_numeric(source_p, RPL_ENDOFLINKS, form_str(RPL_ENDOFLINKS),
 129                            EmptyString(mask) ? "*" : mask);
 130
 131         return 0;
 132 }
 133
 134 /* send_links_cache()
 135  *
 136  * inputs       - client to send to
 137  * outputs      - the cached links, us, and RPL_ENDOFLINKS
 138  * side effects -
 139  */
 140 static void
 141 send_links_cache(struct Client *source_p)
 142 {
 143         dlink_node *ptr;
 144
 145         DLINK_FOREACH(ptr, links_cache_list.head)
 146         {
 147                 sendto_one(source_p, ":%s 364 %s %s",
 148                            me.name, source_p->name, (const char *)ptr->data);
 149         }
 150
 151         sendto_one_numeric(source_p, RPL_LINKS, form_str(RPL_LINKS),
 152                            me.name, me.name, 0, me.info);
 153
 154         sendto_one_numeric(source_p, RPL_ENDOFLINKS, form_str(RPL_ENDOFLINKS), "*");
 155 }
 156