modules/m_capab.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_away.c: Negotiates capabilities with a remote server.
   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_capab.c 1295 2006-05-08 13:05:25Z nenolod $
  25  */
  26
  27 #include "stdinc.h"
  28 #include "client.h"
  29 #include "irc_string.h"
  30 #include "s_serv.h"
  31 #include "s_conf.h"
  32 #include "msg.h"
  33 #include "parse.h"
  34 #include "modules.h"
  35
  36 static int mr_capab(struct Client *, struct Client *, int, const char **);
  37 static int me_gcap(struct Client *, struct Client *, int, const char **);
  38
  39 struct Message capab_msgtab = {
  40         "CAPAB", 0, 0, 0, MFLG_SLOW | MFLG_UNREG,
  41         {{mr_capab, 0}, mg_ignore, mg_ignore, mg_ignore, mg_ignore, mg_ignore}
  42 };
  43 struct Message gcap_msgtab = {
  44         "GCAP", 0, 0, 0, MFLG_SLOW,
  45         {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_gcap, 2}, mg_ignore}
  46 };
  47
  48 mapi_clist_av1 capab_clist[] = { &capab_msgtab, &gcap_msgtab, NULL };
  49 DECLARE_MODULE_AV1(capab, NULL, NULL, capab_clist, NULL, NULL, "$Revision: 1295 $");
  50
  51 /*
  52  * mr_capab - CAPAB message handler
  53  *      parv[0] = sender prefix
  54  *      parv[1] = space-separated list of capabilities
  55  *
  56  */
  57 static int
  58 mr_capab(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  59 {
  60         struct Capability *cap;
  61         int i;
  62         char *p;
  63         char *s;
  64
  65         /* ummm, this shouldn't happen. Could argue this should be logged etc. */
  66         if(client_p->localClient == NULL)
  67                 return 0;
  68
  69         if(client_p->user)
  70                 return 0;
  71
  72         /* CAP_TS6 is set in PASS, so is valid.. */
  73         if((client_p->localClient->caps & ~CAP_TS6) != 0)
  74         {
  75                 exit_client(client_p, client_p, client_p, "CAPAB received twice");
  76                 return 0;
  77         }
  78         else
  79                 client_p->localClient->caps |= CAP_CAP;
  80
  81         MyFree(client_p->localClient->fullcaps);
  82         DupString(client_p->localClient->fullcaps, parv[1]);
  83
  84         for (i = 1; i < parc; i++)
  85         {
  86                 char *t = LOCAL_COPY(parv[i]);
  87                 for (s = strtoken(&p, t, " "); s; s = strtoken(&p, NULL, " "))
  88                 {
  89                         for (cap = captab; cap->name; cap++)
  90                         {
  91                                 if(!irccmp(cap->name, s))
  92                                 {
  93                                         client_p->localClient->caps |= cap->cap;
  94                                         break;
  95                                 }
  96                         }
  97                 }
  98         }
  99
 100         return 0;
 101 }
 102
 103 static int
 104 me_gcap(struct Client *client_p, struct Client *source_p,
 105                 int parc, const char *parv[])
 106 {
 107         struct Capability *cap;
 108         char *t = LOCAL_COPY(parv[1]);
 109         char *s;
 110         char *p;
 111
 112         if(!IsServer(source_p))
 113                 return 0;
 114
 115         /* already had GCAPAB?! */
 116         if(!EmptyString(source_p->serv->fullcaps))
 117                 return 0;
 118
 119         DupString(source_p->serv->fullcaps, parv[1]);
 120
 121         for (s = strtoken(&p, t, " "); s; s = strtoken(&p, NULL, " "))
 122         {
 123                 for (cap = captab; cap->name; cap++)
 124                 {
 125                         if(!irccmp(cap->name, s))
 126                         {
 127                                 source_p->serv->caps |= cap->cap;
 128                                 break;
 129                         }
 130                 }
 131         }
 132
 133         return 0;
 134 }