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netif.h, netif.c: A new NETIF_FLAG_ETHARP flag is defined in netif.h, to allow to initialize a network interface's flag with. It tell this interface is an ethernet device, and we can use ARP with it to do a "gratuitous ARP" (RFC 3220 "IP Mobility Support for IPv4" section 4.6) when interface is "up" with netif_set_up().

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This commit is contained in:
fbernon
2007-03-28 09:23:35 +00:00
parent 4aee4c1ac7
commit cd1c96db56
3 changed files with 30 additions and 12 deletions
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28
src/core/netif.c
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@@ -44,6 +44,11 @@
#include "lwip/tcp.h"
#include "lwip/snmp.h"
#if LWIP_ARP
#include "netif/etharp.h"
#endif /* LWIP_ARP */
struct netif *netif_list = NULL;
struct netif *netif_default = NULL;
@@ -219,14 +224,6 @@ netif_set_ipaddr(struct netif *netif, struct ip_addr *ipaddr)
snmp_insert_ipaddridx_tree(netif);
snmp_insert_iprteidx_tree(0,netif);
#if 0 /* only allowed for Ethernet interfaces TODO: how can we check? */
/** For Ethernet network interfaces, we would like to send a
* "gratuitous ARP"; this is an ARP packet sent by a node in order
* to spontaneously cause other nodes to update an entry in their
* ARP cache. From RFC 3220 "IP Mobility Support for IPv4" section 4.6.
*/
etharp_query(netif, ipaddr, NULL);
#endif
LWIP_DEBUGF(NETIF_DEBUG | DBG_TRACE | DBG_STATE | 3, ("netif: IP address of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
netif->name[0], netif->name[1],
ip4_addr1(&netif->ip_addr),
@@ -296,11 +293,24 @@ void netif_set_up(struct netif *netif)
#if LWIP_SNMP
snmp_get_sysuptime(&netif->ts);
#endif
#endif /* LWIP_SNMP */
#if LWIP_NETIF_CALLBACK
if ( netif->status_callback )
(netif->status_callback)( netif );
#endif /* LWIP_NETIF_CALLBACK */
#if LWIP_ARP
/** For Ethernet network interfaces, we would like to send a
* "gratuitous ARP"; this is an ARP packet sent by a node in order
* to spontaneously cause other nodes to update an entry in their
* ARP cache. From RFC 3220 "IP Mobility Support for IPv4" section 4.6.
*/
if ((netif->flags & NETIF_FLAG_ETHARP) == 0) {
etharp_query(netif, &(netif->ip_addr), NULL);
}
#endif /* LWIP_ARP */
}
}