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Prevent mem_free (leave struct dhcp allocated on dhcp_stop) to prevent calling mem_malloc when restarting dhcp later

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This commit is contained in:
goldsimon 2010-02-01 20:20:38 +00:00
parent c6f7a34abe
commit 81c5d9e983
2 changed files with 9 additions and 10 deletions
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9
src/core/dhcp.c
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@ -625,12 +625,11 @@ dhcp_start(struct netif *netif)
/* clear data structure */
memset(dhcp, 0, sizeof(struct dhcp));
/* dhcp_set_state(&dhcp, DHCP_OFF); */
/* allocate UDP PCB */
dhcp->pcb = udp_new();
if (dhcp->pcb == NULL) {
LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): could not obtain pcb\n"));
mem_free((void *)dhcp);
netif->dhcp = dhcp = NULL;
return ERR_MEM;
}
#if IP_SOF_BROADCAST
@ -672,7 +671,8 @@ dhcp_inform(struct netif *netif)
LWIP_ERROR("netif != NULL", (netif != NULL), return;);
memset(&dhcp, 0, sizeof(dhcp));
memset(&dhcp, 0, sizeof(struct dhcp));
dhcp_set_state(&dhcp, DHCP_INFORM);
if ((netif->dhcp != NULL) && (netif->dhcp->pcb != NULL)) {
/* re-use existing pcb */
@ -1225,8 +1225,7 @@ dhcp_stop(struct netif *netif)
dhcp->pcb = NULL;
}
LWIP_ASSERT("reply wasn't freed", dhcp->msg_in == NULL);
mem_free((void *)dhcp);
netif->dhcp = NULL;
dhcp_set_state(dhcp, DHCP_OFF);
}
}

2
src/include/lwip/dhcp.h
View File

@ -152,6 +152,7 @@ void dhcp_fine_tmr(void);
#define DHCP_SERVER_PORT 67
/** DHCP client states */
#define DHCP_OFF 0
#define DHCP_REQUESTING 1
#define DHCP_INIT 2
#define DHCP_REBOOTING 3
@ -164,7 +165,6 @@ void dhcp_fine_tmr(void);
#define DHCP_BOUND 10
/** not yet implemented #define DHCP_RELEASING 11 */
#define DHCP_BACKING_OFF 12
#define DHCP_OFF 13
/** AUTOIP cooperatation flags */
#define DHCP_AUTOIP_COOP_STATE_OFF 0