diff options
Diffstat (limited to 'eth-multiplexer/ethernet.c')
| -rw-r--r-- | eth-multiplexer/ethernet.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/eth-multiplexer/ethernet.c b/eth-multiplexer/ethernet.c index 002f30c2..1f3a57c4 100644 --- a/eth-multiplexer/ethernet.c +++ b/eth-multiplexer/ethernet.c @@ -42,6 +42,10 @@ static struct port_info *readpt; /* Port for writing message to the real network interface. */ mach_port_t ether_port; + +/* The ethernet address of the real network interface. */ +char ether_address[ETH_ALEN]; + /* Port for receiving messages from the interface. */ static mach_port_t readptname; @@ -102,6 +106,24 @@ int set_promisc (char *dev_name, mach_port_t ether_port, int is_promisc) return 0; } +static error_t +get_ethernet_address (mach_port_t port, char *address) +{ + error_t err; + int net_address[2]; + size_t count = 2; + assert (count * sizeof (int) >= ETH_ALEN); + + err = device_get_status (port, NET_ADDRESS, net_address, &count); + if (err) + return err; + + net_address[0] = ntohl (net_address[0]); + net_address[1] = ntohl (net_address[1]); + memcpy (address, net_address, ETH_ALEN); + return 0; +} + int ethernet_open (char *dev_name, device_t master_device, struct port_bucket *etherport_bucket, struct port_class *etherreadclass) @@ -132,6 +154,11 @@ int ethernet_open (char *dev_name, device_t master_device, error (2, err, "device_set_filter: %s", dev_name); set_promisc (dev_name, ether_port, 1); + + err = get_ethernet_address (ether_port, ether_address); + if (err) + error (2, err, "%s: Cannot get hardware Ethernet address", dev_name); + return 0; } |