[lwip-devel] [bug #24480] Unreleased memory in DHCP

[Benjamin Silvestre]

URL:
  <http://savannah.nongnu.org/bugs/?24480>

                 Summary: Unreleased memory in DHCP
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: bsilvestre
            Submitted on: mar 07 oct 2008 17:35:13 GMT
                Category: None
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: 1.3.0

    _______________________________________________________

Details:

I use the atmel's avr32 port.
In dhcp_start (dhcp.c) when a client is already attached, pcb and p  members
are not destroyed. This leak leads to an unworking dhcp after few starts
(with, in my case, no more udp pcb available).

Calling dhcp_release or/and dhcp_stop before restarting dhcp don't fix the
problem.

So I add udp_remove and pbuf_free when a client is already attached. This
simple workaround works fine for me:
(file dhcp.c after line 586, see dhcp_diff enclosed)
         if (dhcp->pcb != NULL) {
                udp_remove(dhcp->pcb);
                dhcp->pcb = NULL;
    }
    if (dhcp->p != NULL) {
                pbuf_free(dhcp->p);
                dhcp->p = NULL;
    }

Regards,
Benjamin





    _______________________________________________________

File Attachments:


-------------------------------------------------------
Date: mar 07 oct 2008 17:35:13 GMT  Name: dhcp_diff  Size: 439 o   By:
bsilvestre

<http://savannah.nongnu.org/bugs/download.php?file_id=16625>

    _______________________________________________________

Reply to this item at:

  <http://savannah.nongnu.org/bugs/?24480>

_______________________________________________
  Message posté via/par Savannah
  http://savannah.nongnu.org/