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Apply patch #10358: preserve dhcp memory type flag

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MinghaoWang 2025-03-21 22:34:52 +03:00 committed by Mike Kleshov
parent f877b457a1
commit 31d8988f89
1 changed files with 4 additions and 5 deletions
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9
src/core/ipv4/dhcp.c
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@ -773,9 +773,6 @@ dhcp_set_struct(struct netif *netif, struct dhcp *dhcp)
* @ingroup dhcp4
* Removes a struct dhcp from a netif.
*
* ATTENTION: Only use this when not using dhcp_set_struct() to allocate the
* struct dhcp since the memory is passed back to the heap.
*
* @param netif the netif from which to remove the struct dhcp
*/
void dhcp_cleanup(struct netif *netif)
@ -811,6 +808,7 @@ dhcp_start(struct netif *netif)
{
struct dhcp *dhcp;
err_t result;
u8_t saved_flags;
LWIP_ASSERT_CORE_LOCKED();
LWIP_ERROR("netif != NULL", (netif != NULL), return ERR_ARG;);
@ -846,9 +844,10 @@ dhcp_start(struct netif *netif)
/* dhcp is cleared below, no need to reset flag*/
}
/* clear data structure */
/* clear data structure but preserve DHCP_FLAG_EXTERNAL_MEM for dhcp_cleanup() */
saved_flags = dhcp->flags;
memset(dhcp, 0, sizeof(struct dhcp));
/* dhcp_set_state(&dhcp, DHCP_STATE_OFF); */
dhcp->flags = saved_flags & DHCP_FLAG_EXTERNAL_MEM;
#if LWIP_DHCP_DOES_ACD_CHECK