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import os
import sys
import struct
import bluetooth._bluetooth as bluez
def read_inquiry_scan_activity(sock):
"""returns the current inquiry scan interval and window,
or -1 on failure"""
# save current filter
old_filter = sock.getsockopt( bluez.SOL_HCI, bluez.HCI_FILTER, 14)
# Setup socket filter to receive only events related to the
# read_inquiry_mode command
flt = bluez.hci_filter_new()
opcode = bluez.cmd_opcode_pack(bluez.OGF_HOST_CTL,
bluez.OCF_READ_INQ_ACTIVITY)
bluez.hci_filter_set_ptype(flt, bluez.HCI_EVENT_PKT)
bluez.hci_filter_set_event(flt, bluez.EVT_CMD_COMPLETE);
bluez.hci_filter_set_opcode(flt, opcode)
sock.setsockopt( bluez.SOL_HCI, bluez.HCI_FILTER, flt )
# first read the current inquiry mode.
bluez.hci_send_cmd(sock, bluez.OGF_HOST_CTL,
bluez.OCF_READ_INQ_ACTIVITY )
pkt = sock.recv(255)
status,interval,window = struct.unpack("!xxxxxxBHH", pkt)
interval = bluez.btohs(interval)
interval = (interval >> 8) | ( (interval & 0xFF) << 8 )
window = (window >> 8) | ( (window & 0xFF) << 8 )
if status != 0: mode = -1
# restore old filter
sock.setsockopt( bluez.SOL_HCI, bluez.HCI_FILTER, old_filter )
return interval, window
def write_inquiry_scan_activity(sock, interval, window):
"""returns 0 on success, -1 on failure"""
# save current filter
old_filter = sock.getsockopt( bluez.SOL_HCI, bluez.HCI_FILTER, 14)
# Setup socket filter to receive only events related to the
# write_inquiry_mode command
flt = bluez.hci_filter_new()
opcode = bluez.cmd_opcode_pack(bluez.OGF_HOST_CTL,
bluez.OCF_WRITE_INQ_ACTIVITY)
bluez.hci_filter_set_ptype(flt, bluez.HCI_EVENT_PKT)
bluez.hci_filter_set_event(flt, bluez.EVT_CMD_COMPLETE);
bluez.hci_filter_set_opcode(flt, opcode)
sock.setsockopt( bluez.SOL_HCI, bluez.HCI_FILTER, flt )
# send the command!
bluez.hci_send_cmd(sock, bluez.OGF_HOST_CTL,
bluez.OCF_WRITE_INQ_ACTIVITY, struct.pack("HH",
interval, window) )
pkt = sock.recv(255)
status = struct.unpack("xxxxxxB", pkt)[0]
# restore old filter
sock.setsockopt( bluez.SOL_HCI, bluez.HCI_FILTER, old_filter )
if status != 0: return -1
return 0
dev_id = 0
try:
sock = bluez.hci_open_dev(dev_id)
except:
print "error accessing bluetooth device..."
sys.exit(1)
try:
interval, window = read_inquiry_scan_activity(sock)
except Exception, e:
print "error reading inquiry scan activity. "
print e
sys.exit(1)
print "current inquiry scan interval: %d (0x%X) window: %d (0x%X)" % \
(interval, interval, window, window)
if len(sys.argv) == 3:
interval = int(sys.argv[1])
window = int(sys.argv[2])
print "target interval: %d window %d" % (interval, window)
write_inquiry_scan_activity(sock, interval, window)
interval, window = read_inquiry_scan_activity(sock)
print "current inquiry scan interval: %d (0x%X) window: %d (0x%X)" % \
(interval, interval, window, window)
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