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opt.h, netif.h, netif.c, ethernetif.c: Add new configuration option to add a link callback in the netif struct, and functions to handle it. Be carefull for port maintainers to add the NETIF_FLAG_LINK_UP flag (like in ethernetif.c) if you want to be sure to be compatible with future changes...

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This commit is contained in:
fbernon
2007-07-13 15:00:40 +00:00
parent 6a452951f5
commit 116bcb9dfb
5 changed files with 91 additions and 19 deletions
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63
src/core/netif.c
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@@ -48,6 +48,17 @@
#include "netif/etharp.h"
#endif /* LWIP_ARP */
#if LWIP_NETIF_CALLBACK
#define NETIF_STATUS_CALLBACK(n) { if (n->status_callback) (n->status_callback)(n); }
#else
#define NETIF_STATUS_CALLBACK(n) { /* NOP */ }
#endif /* LWIP_NETIF_LINK_CALLBACK */
#if LWIP_NETIF_LINK_CALLBACK
#define NETIF_LINK_CALLBACK(n) { if (n->link_callback) (n->link_callback)(n); }
#else
#define NETIF_LINK_CALLBACK(n) { /* NOP */ }
#endif /* LWIP_NETIF_LINK_CALLBACK */
struct netif *netif_list = NULL;
struct netif *netif_default = NULL;
@@ -100,6 +111,9 @@ netif_add(struct netif *netif, struct ip_addr *ipaddr, struct ip_addr *netmask,
#if LWIP_NETIF_CALLBACK
netif->status_callback = NULL;
#endif /* LWIP_NETIF_CALLBACK */
#if LWIP_NETIF_LINK_CALLBACK
netif->link_callback = NULL;
#endif /* LWIP_NETIF_LINK_CALLBACK */
/* remember netif specific state information data */
netif->state = state;
@@ -364,10 +378,8 @@ void netif_set_up(struct netif *netif)
snmp_get_sysuptime(&netif->ts);
#endif /* LWIP_SNMP */
#if LWIP_NETIF_CALLBACK
if ( netif->status_callback )
(netif->status_callback)( netif );
#endif /* LWIP_NETIF_CALLBACK */
NETIF_LINK_CALLBACK(netif);
NETIF_STATUS_CALLBACK(netif);
#if LWIP_ARP
/** For Ethernet network interfaces, we would like to send a
@@ -408,10 +420,8 @@ void netif_set_down(struct netif *netif)
snmp_get_sysuptime(&netif->ts);
#endif
#if LWIP_NETIF_CALLBACK
if ( netif->status_callback )
(netif->status_callback)( netif );
#endif /* LWIP_NETIF_CALLBACK */
NETIF_LINK_CALLBACK(netif);
NETIF_STATUS_CALLBACK(netif);
}
}
@@ -425,3 +435,40 @@ void netif_set_status_callback( struct netif *netif, void (* status_callback)(st
netif->status_callback = status_callback;
}
#endif /* LWIP_NETIF_CALLBACK */
#if LWIP_NETIF_LINK_CALLBACK
/**
* Set callback to be called when link is brought up/down
*/
void netif_set_link_callback( struct netif *netif, void (* link_callback)(struct netif *netif ))
{
if ( netif )
netif->link_callback = link_callback;
}
/**
* Called by a driver when its link goes down
*/
void netif_set_link_down( struct netif *netif )
{
netif->flags &= ~NETIF_FLAG_LINK_UP;
}
/**
* Called by a driver when its link goes up
*/
void netif_set_link_up( struct netif *netif )
{
netif->flags |= NETIF_FLAG_LINK_UP;
#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) {
etharp_query(netif, &(netif->ip_addr), NULL);
}
#endif /* LWIP_ARP */
}
#endif /* LWIP_NETIF_LINK_CALLBACK */