modules/m_capab.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_capab.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  */
  25
  26 #include "stdinc.h"
  27 #include "client.h"
  28 #include "match.h"
  29 #include "s_serv.h"
  30 #include "s_conf.h"
  31 #include "msg.h"
  32 #include "parse.h"
  33 #include "modules.h"
  34
  35 static int mr_capab(struct Client *, struct Client *, int, const char **);
  36 static int me_gcap(struct Client *, struct Client *, int, const char **);
  37
  38 struct Message capab_msgtab = {
  39         "CAPAB", 0, 0, 0, MFLG_SLOW | MFLG_UNREG,
  40         {{mr_capab, 0}, mg_ignore, mg_ignore, mg_ignore, mg_ignore, mg_ignore}
  41 };
  42 struct Message gcap_msgtab = {
  43         "GCAP", 0, 0, 0, MFLG_SLOW,
  44         {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_gcap, 2}, mg_ignore}
  45 };
  46
  47 mapi_clist_av1 capab_clist[] = { &capab_msgtab, &gcap_msgtab, NULL };
  48 DECLARE_MODULE_AV1(capab, NULL, NULL, capab_clist, NULL, NULL, "$Revision: 1295 $");
  49
  50 /*
  51  * mr_capab - CAPAB message handler
  52  *      parv[1] = space-separated list of capabilities
  53  *
  54  */
  55 static int
  56 mr_capab(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  57 {
  58         struct Capability *cap;
  59         int i;
  60         char *p;
  61         char *s;
  62
  63         /* ummm, this shouldn't happen. Could argue this should be logged etc. */
  64         if(client_p->localClient == NULL)
  65                 return 0;
  66
  67         if(client_p->user)
  68                 return 0;
  69
  70         /* CAP_TS6 is set in PASS, so is valid.. */
  71         if((client_p->localClient->caps & ~CAP_TS6) != 0)
  72         {
  73                 exit_client(client_p, client_p, client_p, "CAPAB received twice");
  74                 return 0;
  75         }
  76         else
  77                 client_p->localClient->caps |= CAP_CAP;
  78
  79         rb_free(client_p->localClient->fullcaps);
  80         client_p->localClient->fullcaps = rb_strdup(parv[1]);
  81
  82         for (i = 1; i < parc; i++)
  83         {
  84                 char *t = LOCAL_COPY(parv[i]);
  85                 for (s = rb_strtok_r(t, " ", &p); s; s = rb_strtok_r(NULL, " ", &p))
  86                 {
  87                         for (cap = captab; cap->name; cap++)
  88                         {
  89                                 if(!irccmp(cap->name, s))
  90                                 {
  91                                         client_p->localClient->caps |= cap->cap;
  92                                         break;
  93                                 }
  94                         }
  95                 }
  96         }
  97
  98         return 0;
  99 }
 100
 101 static int
 102 me_gcap(struct Client *client_p, struct Client *source_p,
 103                 int parc, const char *parv[])
 104 {
 105         struct Capability *cap;
 106         char *t = LOCAL_COPY(parv[1]);
 107         char *s;
 108         char *p;
 109
 110         if(!IsServer(source_p))
 111                 return 0;
 112
 113         /* already had GCAPAB?! */
 114         if(!EmptyString(source_p->serv->fullcaps))
 115         {
 116                 source_p->serv->caps = 0;
 117                 rb_free(source_p->serv->fullcaps);
 118         }
 119
 120         source_p->serv->fullcaps = rb_strdup(parv[1]);
 121
 122         for (s = rb_strtok_r(t, " ", &p); s; s = rb_strtok_r(NULL, " ", &p))
 123         {
 124                 for (cap = captab; cap->name; cap++)
 125                 {
 126                         if(!irccmp(cap->name, s))
 127                         {
 128                                 source_p->serv->caps |= cap->cap;
 129                                 break;
 130                         }
 131                 }
 132         }
 133
 134         return 0;
 135 }