/*
 *  ircd-ratbox: A slightly useful ircd.
 *  m_capab.c: Negotiates capabilities with a remote server.
 *
 *  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 "s_serv.h"
#include "s_conf.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"

static int mr_capab(struct Client *, struct Client *, int, const char **);
static int me_gcap(struct Client *, struct Client *, int, const char **);

struct Message capab_msgtab = {
    "CAPAB", 0, 0, 0, MFLG_SLOW | MFLG_UNREG,
    {{mr_capab, 2}, mg_ignore, mg_ignore, mg_ignore, mg_ignore, mg_ignore}
};
struct Message gcap_msgtab = {
    "GCAP", 0, 0, 0, MFLG_SLOW,
    {mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_gcap, 2}, mg_ignore}
};

mapi_clist_av1 capab_clist[] = { &capab_msgtab, &gcap_msgtab, NULL };
DECLARE_MODULE_AV1(capab, NULL, NULL, capab_clist, NULL, NULL, "$Revision: 1295 $");

/*
 * mr_capab - CAPAB message handler
 *      parv[1] = space-separated list of capabilities
 *
 */
static int
mr_capab(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
    struct Capability *cap;
    int i;
    char *p;
    char *s;

    /* ummm, this shouldn't happen. Could argue this should be logged etc. */
    if(client_p->localClient == NULL)
        return 0;

    if(client_p->user)
        return 0;

    /* CAP_TS6 is set in PASS, so is valid.. */
    if((client_p->localClient->caps & ~CAP_TS6) != 0) {
        exit_client(client_p, client_p, client_p, "CAPAB received twice");
        return 0;
    } else
        client_p->localClient->caps |= CAP_CAP;

    rb_free(client_p->localClient->fullcaps);
    client_p->localClient->fullcaps = rb_strdup(parv[1]);

    for (i = 1; i < parc; i++) {
        char *t = LOCAL_COPY(parv[i]);
        for (s = rb_strtok_r(t, " ", &p); s; s = rb_strtok_r(NULL, " ", &p)) {
            for (cap = captab; cap->name; cap++) {
                if(!irccmp(cap->name, s)) {
                    client_p->localClient->caps |= cap->cap;
                    break;
                }
            }
        }
    }

    return 0;
}

static int
me_gcap(struct Client *client_p, struct Client *source_p,
        int parc, const char *parv[])
{
    struct Capability *cap;
    char *t = LOCAL_COPY(parv[1]);
    char *s;
    char *p;

    if(!IsServer(source_p))
        return 0;

    /* already had GCAPAB?! */
    if(!EmptyString(source_p->serv->fullcaps)) {
        source_p->serv->caps = 0;
        rb_free(source_p->serv->fullcaps);
    }

    source_p->serv->fullcaps = rb_strdup(parv[1]);

    for (s = rb_strtok_r(t, " ", &p); s; s = rb_strtok_r(NULL, " ", &p)) {
        for (cap = captab; cap->name; cap++) {
            if(!irccmp(cap->name, s)) {
                source_p->serv->caps |= cap->cap;
                break;
            }
        }
    }

    return 0;
}
