parse_from.c

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/*
 * $Id$
 *
 * Copyright (C) 2001-2003 FhG Fokus
 *
 * This file is part of ser, a free SIP server.
 *
 * ser 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
 *
 * For a license to use the ser software under conditions
 * other than those described here, or to purchase support for this
 * software, please contact iptel.org by e-mail at the following addresses:
 *    info@iptel.org
 *
 * ser 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 "parse_from.h"
#include "parse_to.h"
#include <stdlib.h>
#include <string.h>
#include "../dprint.h"
#include "msg_parser.h"
#include "parse_uri.h"
#include "../ut.h"
#include "../mem/mem.h"

int parse_from_header( struct sip_msg *msg)
{
        struct to_body* from_b;

        if ( !msg->from && ( parse_headers(msg,HDR_FROM_F,0)==-1 || !msg->from)) {
                LOG(L_ERR,"ERROR:parse_from_header: bad msg or missing FROM header\n");
                goto error;
        }

        /* maybe the header is already parsed! */
        if (msg->from->parsed)
                return 0;

        /* bad luck! :-( - we have to parse it */
        /* first, get some memory */
        from_b = pkg_malloc(sizeof(struct to_body));
        if (from_b == 0) {
                LOG(L_ERR, "ERROR:parse_from_header: out of pkg_memory\n");
                goto error;
        }

        /* now parse it!! */
        memset(from_b, 0, sizeof(struct to_body));
        parse_to(msg->from->body.s,msg->from->body.s+msg->from->body.len+1,from_b);
        if (from_b->error == PARSE_ERROR) {
                LOG(L_ERR, "ERROR:parse_from_header: bad from header [%.*s]\n",
                                msg->from->body.len, msg->from->body.s);
                free_to(from_b);
                goto error;
        }
        msg->from->parsed = from_b;

        return 0;
error:
        return -1;
}

sip_uri_t *parse_from_uri(sip_msg_t *msg)
{
        to_body_t *tb = NULL;
        
        if(msg==NULL)
                return NULL;

        if(parse_from_header(msg)<0)
        {
                LM_ERR("cannot parse FROM header\n");
                return NULL;
        }
        
        if(msg->from==NULL || get_from(msg)==NULL)
                return NULL;

        tb = get_from(msg);
        
        if(tb->parsed_uri.user.s!=NULL || tb->parsed_uri.host.s!=NULL)
                return &tb->parsed_uri;
        
        if (parse_uri(tb->uri.s, tb->uri.len , &tb->parsed_uri)<0)
        {
                LM_ERR("failed to parse From uri\n");
                memset(&tb->parsed_uri, 0, sizeof(struct sip_uri));
                return NULL;
        }
        return &tb->parsed_uri;
}