modules_k/xmpp/util.c

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/*
 * $Id$
 *
 * XMPP Module
 * This file is part of Kamailio, a free SIP server.
 *
 * Copyright (C) 2006 Voice Sistem S.R.L.
 *
 * Kamailio 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
 *
 * Kamailio 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
 *
 * Author: Andreea Spirea
 *
 */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#include "xmpp.h"
#include "../../parser/parse_uri.h"
#include "../../parser/parse_param.h"

extern param_t *_xmpp_gwmap_list;

char *decode_uri_sip_xmpp(char *uri)
{
        sip_uri_t puri;
        static char buf[512];
        char *p;
        param_t *it = NULL;

        if (!uri)
                return NULL;
        if (parse_uri(uri, strlen(uri), &puri) < 0) {
                LM_ERR("failed to parse URI\n");
                return NULL;
        }
        if(_xmpp_gwmap_list==0)
        {
                strncpy(buf, puri.user.s, sizeof(buf));
                buf[puri.user.len] = 0;
        
                /* replace domain separator */
                if ((p = strchr(buf, domain_separator)))
                        *p = '@';
        } else {
                for(it=_xmpp_gwmap_list; it; it=it->next)
                {
                        if(it->name.len==puri.host.len
                                        && strncasecmp(it->name.s, puri.host.s, it->name.len)==0)
                        {
                                break;
                        }
                }
                if(it && it->body.len>0)
                {
                        snprintf(buf, 512, "%.*s@%.*s", puri.user.len, puri.user.s,
                                        it->body.len, it->body.s);
                } else {
                        snprintf(buf, 512, "%.*s@%.*s", puri.user.len, puri.user.s,
                                        puri.host.len, puri.host.s);
                }
        }
        return buf;
}

char *encode_uri_sip_xmpp(char *uri)
{
        sip_uri_t puri;
        static char buf[512];
        param_t *it = NULL;

        if (!uri)
                return NULL;
        if (parse_uri(uri, strlen(uri), &puri) < 0) {
                LM_ERR("failed to parse URI\n");
                return NULL;
        }
        if(_xmpp_gwmap_list==0)
        {
                snprintf(buf, sizeof(buf), "%.*s%c%.*s@%s",
                        puri.user.len, puri.user.s,
                        domain_separator,
                        puri.host.len, puri.host.s,
                        xmpp_domain);
        } else {
                for(it=_xmpp_gwmap_list; it; it=it->next)
                {
                        if(it->name.len==puri.host.len
                                        && strncasecmp(it->name.s, puri.host.s, it->name.len)==0)
                        {
                                break;
                        }
                }
                if(it && it->body.len>0)
                {
                        snprintf(buf, 512, "%.*s@%.*s", puri.user.len, puri.user.s,
                                        it->body.len, it->body.s);
                } else {
                        snprintf(buf, 512, "%.*s@%.*s", puri.user.len, puri.user.s,
                                        puri.host.len, puri.host.s);
                }
        }
        return buf;
}

char *decode_uri_xmpp_sip(char *jid)
{
        static char buf[512];
        char *p;
        char tbuf[512];
        sip_uri_t puri;
        str sd;
        param_t *it = NULL;

        if (!jid)
                return NULL;

        if(_xmpp_gwmap_list==0)
        {
                snprintf(buf, sizeof(buf), "sip:%s", jid);

                /* strip off resource */
                if ((p = strchr(buf, '/')))
                        *p = 0;
                /* strip off domain */
                if ((p = strchr(buf, '@')))
                        *p = 0;
                /* replace domain separator */
                if ((p = strchr(buf, domain_separator)))
                        *p = '@';
        } else {
                snprintf(tbuf, sizeof(tbuf), "sip:%s", jid);

                /* strip off resource */
                if ((p = strchr(tbuf, '/')))
                        *p = 0;
                if (parse_uri(tbuf, strlen(tbuf), &puri) < 0) {
                        LM_ERR("failed to parse URI\n");
                        return NULL;
                }
                for(it=_xmpp_gwmap_list; it; it=it->next)
                {
                        if(it->body.len>0)
                        {
                                sd = it->body;
                        } else {
                                sd = it->name;
                        }
                        if(sd.len==puri.host.len
                                        && strncasecmp(sd.s, puri.host.s, sd.len)==0)
                        {
                                break;
                        }
                }
                if(it)
                {
                        snprintf(buf, 512, "sip:%.*s@%.*s", puri.user.len, puri.user.s,
                                        it->name.len, it->name.s);
                } else {
                        snprintf(buf, 512, "sip:%.*s@%.*s", puri.user.len, puri.user.s,
                                        puri.host.len, puri.host.s);
                }

        }
        return buf;
}

char *encode_uri_xmpp_sip(char *jid)
{
        static char buf[512];
        char *p;
        char tbuf[512];
        sip_uri_t puri;
        str sd;
        param_t *it = NULL;

        if (!jid)
                return NULL;

        if(_xmpp_gwmap_list==0)
        {
                /* TODO: maybe not modify jid? */
                if ((p = strchr(jid, '/')))
                        *p = 0;
                if ((p = strchr(jid, '@')))
                        *p = domain_separator;
                snprintf(buf, sizeof(buf), "sip:%s@%s", jid, gateway_domain);
        } else {
                snprintf(tbuf, sizeof(tbuf), "sip:%s", jid);

                /* strip off resource */
                if ((p = strchr(tbuf, '/')))
                        *p = 0;
                if (parse_uri(tbuf, strlen(tbuf), &puri) < 0) {
                        LM_ERR("failed to parse URI\n");
                        return NULL;
                }
                for(it=_xmpp_gwmap_list; it; it=it->next)
                {
                        if(it->body.len>0)
                        {
                                sd = it->body;
                        } else {
                                sd = it->name;
                        }
                        if(sd.len==puri.host.len
                                        && strncasecmp(sd.s, puri.host.s, sd.len)==0)
                        {
                                break;
                        }
                }
                if(it)
                {
                        snprintf(buf, 512, "sip:%.*s@%.*s", puri.user.len, puri.user.s,
                                        it->name.len, it->name.s);
                } else {
                        snprintf(buf, 512, "sip:%.*s@%.*s", puri.user.len, puri.user.s,
                                        puri.host.len, puri.host.s);
                }

        }

        return buf;
}

char *extract_domain(char *jid)
{
        char *p;
        
        if ((p = strchr(jid, '/')))
                *p = 0;
        if ((p = strchr(jid, '@'))) {
                *p++ = 0;
                return p;
        }
        return p;
}

char *random_secret(void)
{
        static char secret[41];
        int i, r;

        for (i = 0; i < 40; i++) {
            r = (int) (36.0 * rand() / RAND_MAX);
            secret[i] = (r >= 0 && r <= 9) ? (r + 48) : (r + 87);
        }
        secret[40] = '\0';

        return secret;
}

char *db_key(char *secret, char *domain, char *id)
{
        char buf[1024];
        char *hash;
        
        snprintf(buf, sizeof(buf), "%s", secret);
        hash = shahash(buf);

        snprintf(buf, sizeof(buf), "%s%s", hash, domain);
        hash = shahash(buf);

        snprintf(buf, sizeof(buf), "%s%s", hash, id);
        hash = shahash(buf);
        return hash;
}