data_lump_rpl.c

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/*
 * $Id: data_lump_rpl.c 4597 2008-08-06 11:04:06Z klaus_darilion $
 *
 * Copyright (C) 2001-2003 FhG Fokus
 *
 * This file is part of Kamailio, a free SIP server.
 *
 * 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
 *
 * History:
 * --------
 * 2002-02-14 : created by bogdan
 * 2003-09-11 : lump_rpl type added - LUMP_RPL_BODY & LUMP_RPL_HDR (bogdan)
 * 2003-11-11 : build_lump_rpl merged into add_lump_rpl; types -> flags ;
 *              flags LUMP_RPL_NODUP and LUMP_RPL_NOFREE added (bogdan)
 */

/*!
 * \file
 * \brief Kamailio Generic lump functions for replies
 */


#include <string.h>
#include "dprint.h"
#include "mem/mem.h"
#include "data_lump_rpl.h"



struct lump_rpl* add_lump_rpl(struct sip_msg *msg, char *s, int len, int flags)
{
   struct lump_rpl *lump = 0;
   struct lump_rpl *foo;

   /* some checking */
   if ( (flags&(LUMP_RPL_HDR|LUMP_RPL_BODY))==(LUMP_RPL_HDR|LUMP_RPL_BODY)
   || (flags&(LUMP_RPL_HDR|LUMP_RPL_BODY))==0 || (flags&LUMP_RPL_SHMEM) ) {
      LM_ERR("bad flags combination (%d)!\n",flags);
      goto error;
   }
   if (len<=0 || s==0) {
      LM_ERR("I won't add an empty lump!\n");
      goto error;
   }

   /* build the lump */
   lump = (struct lump_rpl*) pkg_malloc
      ( sizeof(struct lump_rpl) + ((flags&LUMP_RPL_NODUP)?0:len) );
   if (!lump) {
      LM_ERR("no free pkg memory !\n");
      goto error;
   }

   if (flags&LUMP_RPL_NODUP) {
      lump->text.s = s;
   } else {
      lump->text.s = ((char*)lump)+sizeof(struct lump_rpl);
      memcpy( lump->text.s, s, len);
   }
   lump->text.len = len;
   lump->flags = flags;
   lump->next = 0;

   /* add the lump to the msg */
   if (!msg->reply_lump) {
      msg->reply_lump = lump;
   }else{
      if (!(flags&LUMP_RPL_BODY))
         for(foo=msg->reply_lump;foo->next;foo=foo->next);
      else
         for(foo=msg->reply_lump; ;foo=foo->next) {
            if (foo->flags&LUMP_RPL_BODY) {
               LM_ERR("LUMP_RPL_BODY already added!\n");
               pkg_free(lump);
               goto error;
            }
            if (foo->next==0)
               break;
         }
      foo->next = lump;
   }

   return lump;
error:
   return 0;
}



void free_lump_rpl(struct lump_rpl* lump)
{
   if (lump) {
      if (!((lump->flags)&LUMP_RPL_NOFREE) && ((lump->flags)&LUMP_RPL_NODUP)
      && lump->text.s)
         pkg_free(lump->text.s);
      pkg_free(lump);
   }
}


void unlink_lump_rpl(struct sip_msg * msg, struct lump_rpl* lump)
{
   struct lump_rpl *foo,*prev;

   /* look for the lump to be unlink */
   foo = msg->reply_lump;
   prev = 0;
   while( foo && foo!=lump ) {
      prev = foo;
      foo = foo->next;
   }

   /* if the lump was found into the list -> unlink it */
   if (foo) {
      if (prev)
         prev->next = foo->next;
      else
         msg->reply_lump = foo->next;
   }
}

void del_nonshm_lump_rpl(struct lump_rpl** list)
{
        struct lump_rpl* it, *tmp;
        struct lump_rpl** pred;

        it = *list;
        pred = list;

        while(it) {
                if (!(it->flags & LUMP_RPL_SHMEM)) {
                        tmp = it;
                        *pred = it->next;
                        it = it->next;
                        free_lump_rpl(tmp);
                        continue;
                }

                pred = &it->next;
                it = it->next;
        }
}

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