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