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netifapi: add thread safe ARP APIs (task #14724)

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This adds thread safe netifapi ARP cache APIs for add/remove
This commit is contained in:
Joel Cunningham 2017-11-14 14:38:10 -06:00
parent 40a563cdd3
commit c47d161d4a
3 changed files with 81 additions and 0 deletions
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3
CHANGELOG
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@ -6,6 +6,9 @@ HISTORY
++ New features:
2017-11-14: Joel Cunningham
* netifapi: Add thread safe ARP cache APIs (task #14724)
2017-11-06: Axel Lin
* TCP: kill existing connections with a LOWER priority than the one currently being opened.
Previous implementations also kill existing connections of the SAME priority.

64
src/api/netifapi.c
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@ -42,6 +42,7 @@
#if LWIP_NETIF_API /* don't build if not configured for use in lwipopts.h */
#include "lwip/etharp.h"
#include "lwip/netifapi.h"
#include "lwip/memp.h"
#include "lwip/priv/tcpip_priv.h"
@ -147,6 +148,69 @@ netifapi_do_netif_common(struct tcpip_api_call_data *m)
}
}
#if LWIP_ARP && LWIP_IPV4
/**
* @ingroup netifapi_arp
* Add or update an entry in the ARP cache.
* For an update, ipaddr is used to find the cache entry.
*
* @param ipaddr IPv4 address of cache entry
* @param ethaddr hardware address mapped to ipaddr
* @param type type of ARP cache entry
* @return ERR_OK: entry added/updated, else error from err_t
*/
err_t
netifapi_arp_add(const ip4_addr_t *ipaddr, struct eth_addr *ethaddr, enum netifapi_arp_entry type)
{
err_t err;
/* We only support permanent entries currently */
LWIP_UNUSED_ARG(type);
#if ETHARP_SUPPORT_STATIC_ENTRIES && LWIP_TCPIP_CORE_LOCKING
LOCK_TCPIP_CORE();
err = etharp_add_static_entry(ipaddr, ethaddr);
UNLOCK_TCPIP_CORE();
#else
/* @todo add new vars to struct netifapi_msg and create a 'do' func */
LWIP_UNUSED_ARG(ipaddr);
LWIP_UNUSED_ARG(ethaddr);
err = ERR_VAL;
#endif /* ETHARP_SUPPORT_STATIC_ENTRIES && LWIP_TCPIP_CORE_LOCKING */
return err;
}
/**
* @ingroup netifapi_arp
* Remove an entry in the ARP cache identified by ipaddr
*
* @param ipaddr IPv4 address of cache entry
* @param type type of ARP cache entry
* @return ERR_OK: entry removed, else error from err_t
*/
err_t
netifapi_arp_remove(const ip4_addr_t *ipaddr, enum netifapi_arp_entry type)
{
err_t err;
/* We only support permanent entries currently */
LWIP_UNUSED_ARG(type);
#if ETHARP_SUPPORT_STATIC_ENTRIES && LWIP_TCPIP_CORE_LOCKING
LOCK_TCPIP_CORE();
err = etharp_remove_static_entry(ipaddr);
UNLOCK_TCPIP_CORE();
#else
/* @todo add new vars to struct netifapi_msg and create a 'do' func */
LWIP_UNUSED_ARG(ipaddr);
err = ERR_VAL;
#endif /* ETHARP_SUPPORT_STATIC_ENTRIES && LWIP_TCPIP_CORE_LOCKING */
return err;
}
#endif /* LWIP_ARP && LWIP_IPV4 */
/**
* @ingroup netifapi_netif
* Call netif_add() in a thread-safe way by running that function inside the

14
src/include/lwip/netifapi.h
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@ -42,12 +42,26 @@
#include "lwip/autoip.h"
#include "lwip/priv/tcpip_priv.h"
#include "lwip/priv/api_msg.h"
#include "lwip/prot/ethernet.h"
#ifdef __cplusplus
extern "C" {
#endif
/* API for application */
#if LWIP_ARP && LWIP_IPV4
/* Used for netfiapi_arp_* APIs */
enum netifapi_arp_entry {
NETIFAPI_ARP_PERM /* Permanent entry */
/* Other entry types can be added here */
};
/** @ingroup netifapi_arp */
err_t netifapi_arp_add(const ip4_addr_t *ipaddr, struct eth_addr *ethaddr, enum netifapi_arp_entry type);
/** @ingroup netifapi_arp */
err_t netifapi_arp_remove(const ip4_addr_t *ipaddr, enum netifapi_arp_entry type);
#endif /* LWIP_ARP && LWIP_IPV4 */
err_t netifapi_netif_add(struct netif *netif,
#if LWIP_IPV4
const ip4_addr_t *ipaddr, const ip4_addr_t *netmask, const ip4_addr_t *gw,