Exemple #1
0
def configureBhaulInterface(essid):
    """Configure an interface to talk to an access point"""

    try:
        log_info("Configuring backhaul interface onto AP: %s" % essid)
        # Take interface down
        log_command("/sbin/ifdown %s 2>&1" % BACKHAUL_IFNAME)

        # Write /etc/network/interfaces stanza
        ifaces = debian_interfaces()
        iface = ifaces[BACKHAUL_IFNAME]
        iface["wpa-ssid"] = essid
        ifaces[BACKHAUL_IFNAME] = iface
        try:
            remountrw("configureBhaulInterface")
            ifaces.write()
        finally:
            remountro("configureBhaulInterface")

        # Bring Up
        log_command("/sbin/ifup %s 2>&1" % BACKHAUL_IFNAME)
        ifaces = getInterfaces(returnOne=BACKHAUL_IFNAME)
        if len(ifaces) != 1 or not ifaces[0]["up"]:
            # Failed
            log_error("Failed to configure and bring up backhaul " \
                    "interface (%s)" % BACKHAUL_IFNAME)
            return False
        return True
    except:
        log_error("Unexpected exception while configuring backhaul!", 
                sys.exc_info())
        return False
Exemple #2
0
def getBackhaulStatus():
    """Returns the status of the backhaul interface"""

    nopeer = {"snr":0,"signal":0,"noise":0}
    
    ifaces = getInterfaces(returnOne=BACKHAUL_IFNAME)
    if len(ifaces) != 1:
        return ("critical", "Backhaul interface not found", nopeer)
    iface = ifaces[0]
    wiface = iwtools.get_interface(BACKHAUL_IFNAME)

    if not iface["up"]:
        ifaces = debian_interfaces()
        apname = ifaces[BACKHAUL_IFNAME]["wpa-ssid"].replace(ESSID_PREFIX, "")
        return ("critical", "%s - Not associated" % apname, nopeer)
    
    essid = wiface.get_essid()
    if not essid.startswith(ESSID_PREFIX) and essid != "Any":
        log_warn("Associated to invalid AP: %s" % essid)
        return ("warning", "Not associated to correct Access Point", nopeer)
    parts = essid.split("-")

    stats = wiface.get_stats()
    if getActiveUsername() != getISPUsername():
        return ("warning", "Connected as '%s' not '%s'" % \
                (getActiveUsername(), getISPUsername()), stats)

    return ("ok", "%s" % "-".join(parts[1:]), stats)
Exemple #3
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def checkUpstream():
    
    ifaces = debian_interfaces()
    diface = ifaces[BACKHAUL_IFNAME]
    if diface["wpa-ssid"] == "default":
        # Not configured, scan for valid APs
        try:
            log_command("/sbin/ip link set up dev %s 2>&1" % BACKHAUL_IFNAME)
            wiface = iwtools.get_interface(BACKHAUL_IFNAME)
            scanres = wiface.scanall()
        except:
            log_error("Could not complete scan on backhaul interface (%s)!" % \
                    BACKHAUL_IFNAME, sys.exc_info())
            scanres = []
        # Exclude networks that don't match our ESSID
        aps = [ n for n in scanres if n.essid.startswith(ESSID_PREFIX)]
        # Pick the one with the highest SNR
        best = None
        for ap in aps:
            if best is None or ap.qual["snr"] > best.qual["snr"]:
                best = ap
        # Select it
        if best is not None:
            log_info("Selecting Access Point '%s' based on SNR strength" % \
                    best.essid)
            configureBhaulInterface(best.essid)

        # Hope for the best
        return

    # Check that the backhaul is up
    doUp = False
    ifaces = getInterfaces(returnOne=BACKHAUL_IFNAME)
    if len(ifaces) != 1:
        ensureBackhaulUp()
        return

    iface = ifaces[0]        
    if not iface["up"]:
        ensureBackhaulUp()
        return
    
    # Check credentials are up to date
    if diface["wpa-identity"] != getActiveUsername() or \
            diface["wpa-password"] != getActivePassword():
        # Take down so that we re-authenticate
        log_info("Triggering reassociation to update credentials")
        log_command("/sbin/ifdown %s 2>&1" % BACKHAUL_IFNAME)
        ensureBackhaulUp()
        return

    # Check IP layer is OK
    dg = getGatewayIP()
    if dg == "":
        log_info("Triggering reassociation to acquire gateway")
        log_command("/sbin/ifdown %s 2>&1" % BACKHAUL_IFNAME)
        ensureBackhaulUp()
        return
Exemple #4
0
def setISPDetails(username, password):

    try:
        # Write /etc/network/interfaces stanza
        ifaces = debian_interfaces()
        iface = ifaces[BACKHAUL_IFNAME]
        iface["wpa-identity"] = username
        iface["wpa-password"] = password
        ifaces[BACKHAUL_IFNAME] = iface
        try:
            remountrw("setISPDetails")
            ifaces.write()
        finally:
            remountro("setISPDetails")
        
        return True
    except:
        log_error("Unexpected exception while configuring ISP details!", 
                sys.exc_info())
        return False
Exemple #5
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def getISPPassword():
    """Returns the currently configured ISP Password"""
    ifaces = debian_interfaces()
    return ifaces[BACKHAUL_IFNAME]["wpa-password"]
Exemple #6
0
def getISPUsername():
    """Returns the currently configured ISP Username"""
    ifaces = debian_interfaces()
    return ifaces[BACKHAUL_IFNAME]["wpa-identity"]