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Added a function to deallocate the struct dhcp from a netif (fixes bug #31525).

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This commit is contained in:
goldsimon 2010-11-21 13:41:11 +00:00
parent f418782c2c
commit 32f02325f9
3 changed files with 24 additions and 0 deletions
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4
CHANGELOG
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@ -13,6 +13,10 @@ HISTORY
++ New features:
2010-06-16: Simon Goldschmidt
* dhcp.c/.h: Added a function to deallocate the struct dhcp from a netif
(fixes bug #31525).
2010-07-12: Simon Goldschmidt (patch by Stephane Lesage)
* ip.c, udp.c/.h, pbuf.h, sockets.c: task #10495: Added support for
IP_MULTICAST_LOOP at socket- and raw-API level.

17
src/core/dhcp.c
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@ -592,6 +592,23 @@ dhcp_set_struct(struct netif *netif, struct dhcp *dhcp)
netif->dhcp = dhcp;
}
/** 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)
{
LWIP_ASSERT("netif != NULL", netif != NULL);
if (netif->dhcp != NULL) {
mem_free(netif->dhcp);
netif->dhcp = NULL;
}
}
/**
* Start DHCP negotiation for a network interface.
*

3
src/include/lwip/dhcp.h
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@ -106,6 +106,9 @@ PACK_STRUCT_END
#endif
void dhcp_set_struct(struct netif *netif, struct dhcp *dhcp);
/** Remove a struct dhcp previously set to the netif using dhcp_set_struct() */
#define dhcp_remove_struct(netif) do { (netif)->dhcp = NULL; } while(0)
void dhcp_cleanup(struct netif *netif);
/** start DHCP configuration */
err_t dhcp_start(struct netif *netif);
/** enforce early lease renewal (not needed normally)*/