diff options
Diffstat (limited to 'src/net/netdevice.c')
| -rw-r--r-- | src/net/netdevice.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/net/netdevice.c b/src/net/netdevice.c index e8587a9d9..9e142d274 100644 --- a/src/net/netdevice.c +++ b/src/net/netdevice.c @@ -45,6 +45,9 @@ static struct net_protocol net_protocols_end[0] /** List of network devices */ struct list_head net_devices = LIST_HEAD_INIT ( net_devices ); +/** List of open network devices, in reverse order of opening */ +struct list_head open_net_devices = LIST_HEAD_INIT ( open_net_devices ); + /** * Record network device statistic * @@ -368,6 +371,10 @@ int netdev_open ( struct net_device *netdev ) { /* Mark as opened */ netdev->state |= NETDEV_OPEN; + + /* Add to head of open devices list */ + list_add ( &netdev->open_list, &open_net_devices ); + return 0; } @@ -393,6 +400,9 @@ void netdev_close ( struct net_device *netdev ) { /* Mark as closed */ netdev->state &= ~NETDEV_OPEN; + + /* Remove from open devices list */ + list_del ( &netdev->open_list ); } /** @@ -463,6 +473,22 @@ struct net_device * find_netdev_by_location ( unsigned int bus_type, } /** + * Get most recently opened network device + * + * @ret netdev Most recently opened network device, or NULL + */ +struct net_device * last_opened_netdev ( void ) { + struct net_device *netdev; + + list_for_each_entry ( netdev, &open_net_devices, open_list ) { + assert ( netdev->state & NETDEV_OPEN ); + return netdev; + } + + return NULL; +} + +/** * Transmit network-layer packet * * @v iobuf I/O buffer |