int ethernet_open (char *dev_name, device_t master_device, struct port_bucket *etherport_bucket, struct port_class *etherreadclass) { error_t err; assert (ether_port == MACH_PORT_NULL); err = ports_create_port (etherreadclass, etherport_bucket, sizeof (struct port_info), &readpt); if (err) error (2, err, "ports_create_port"); readptname = ports_get_right (readpt); mach_port_insert_right (mach_task_self (), readptname, readptname, MACH_MSG_TYPE_MAKE_SEND); mach_port_set_qlimit (mach_task_self (), readptname, MACH_PORT_QLIMIT_MAX); err = device_open (master_device, D_WRITE | D_READ, "eth", ðer_port); mach_port_deallocate (mach_task_self (), master_device); if (err) error (2, err, "device_open: %s", dev_name); err = device_set_filter (ether_port, ports_get_right (readpt), MACH_MSG_TYPE_MAKE_SEND, 0, (unsigned short *)ether_filter, ether_filter_len); if (err) error (2, err, "device_set_filter: %s", dev_name); set_promisc (dev_name, ether_port, 1); return 0; }
int ethernet_open (struct device *dev) { error_t err; device_t master_device; struct ether_device *edev = (struct ether_device *) dev->priv; assert (edev->ether_port == MACH_PORT_NULL); err = ports_create_port (etherreadclass, etherport_bucket, sizeof (struct port_info), &edev->readpt); assert_perror (err); edev->readptname = ports_get_right (edev->readpt); mach_port_insert_right (mach_task_self (), edev->readptname, edev->readptname, MACH_MSG_TYPE_MAKE_SEND); mach_port_set_qlimit (mach_task_self (), edev->readptname, MACH_PORT_QLIMIT_MAX); master_device = file_name_lookup (dev->name, O_READ | O_WRITE, 0); if (master_device != MACH_PORT_NULL) { /* The device name here is the path of a device file. */ err = device_open (master_device, D_WRITE | D_READ, "eth", &edev->ether_port); mach_port_deallocate (mach_task_self (), master_device); if (err) error (2, err, "device_open on %s", dev->name); err = device_set_filter (edev->ether_port, ports_get_right (edev->readpt), MACH_MSG_TYPE_MAKE_SEND, 0, bpf_ether_filter, bpf_ether_filter_len); if (err) error (2, err, "device_set_filter on %s", dev->name); } else { /* No, perhaps a Mach device? */ int file_errno = errno; err = get_privileged_ports (0, &master_device); if (err) { error (0, file_errno, "file_name_lookup %s", dev->name); error (2, err, "and cannot get device master port"); } err = device_open (master_device, D_WRITE | D_READ, dev->name, &edev->ether_port); mach_port_deallocate (mach_task_self (), master_device); if (err) { error (0, file_errno, "file_name_lookup %s", dev->name); error (2, err, "device_open(%s)", dev->name); } err = device_set_filter (edev->ether_port, ports_get_right (edev->readpt), MACH_MSG_TYPE_MAKE_SEND, 0, ether_filter, ether_filter_len); if (err) error (2, err, "device_set_filter on %s", dev->name); } return 0; }