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Implement API function to iterate over stable ARP table entries

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This commit is contained in:
Dirk Ziegelmeier 2015-11-16 09:53:23 +01:00
parent 73bb986737
commit 39370db55d
2 changed files with 27 additions and 0 deletions
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1
src/include/netif/etharp.h
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@ -198,6 +198,7 @@ struct etharp_q_entry {
void etharp_tmr(void);
s8_t etharp_find_addr(struct netif *netif, const ip4_addr_t *ipaddr,
struct eth_addr **eth_ret, const ip4_addr_t **ip_ret);
u8_t etharp_get_entry(u8_t i, ip4_addr_t **ipaddr, struct netif **netif, struct eth_addr **eth_ret);
err_t etharp_output(struct netif *netif, struct pbuf *q, const ip4_addr_t *ipaddr);
err_t etharp_query(struct netif *netif, const ip4_addr_t *ipaddr, struct pbuf *q);
err_t etharp_request(struct netif *netif, const ip4_addr_t *ipaddr);

26
src/netif/etharp.c
View File

@ -650,6 +650,32 @@ etharp_find_addr(struct netif *netif, const ip4_addr_t *ipaddr,
return -1;
}
/**
* Possibility to iterate over stable ARP table entries
*
* @param i entry number, 0 to ARP_TABLE_SIZE
* @param ipaddr return value: IP address
* @param netif return value: points to interface
* @param eth_ret return value: ETH address
* @return 1 on valid index, 0 otherwise
*/
u8_t
etharp_get_entry(u8_t i, ip4_addr_t **ipaddr, struct netif **netif, struct eth_addr **eth_ret)
{
LWIP_ASSERT("ipaddr != NULL", ipaddr != NULL);
LWIP_ASSERT("netif != NULL", netif != NULL);
LWIP_ASSERT("eth_ret != NULL", eth_ret != NULL);
if((i < ARP_TABLE_SIZE) && (arp_table[i].state >= ETHARP_STATE_STABLE)) {
*ipaddr = &arp_table[i].ipaddr;
*netif = arp_table[i].netif;
*eth_ret = &arp_table[i].ethaddr;
return 1;
} else {
return 0;
}
}
#if ETHARP_TRUST_IP_MAC
/**
* Updates the ARP table using the given IP packet.