xref: /aosp_15_r20/external/libnl/python/examples/wiphy.py (revision 4dc78e53d49367fa8e61b07018507c90983a077d)

from __future__ import print_function
import netlink.capi as nl
import netlink.genl.capi as genl
import nl80211
import sys
import traceback


class test_class:
    def __init__(self):
        self.done = 1


def freq_to_ch(freq):
    if freq == 2484:
        return 14

    if freq < 2484:
        return (freq - 2407) / 5

    # FIXME: dot11ChannelStartingFactor (802.11-2007 17.3.8.3.2)
    if freq < 45000:
        return freq / 5 - 1000

    if freq >= 58320 and freq <= 64800:
        return (freq - 56160) / 2160

    return 0


def handle_freq(attr, pol):
    e, fattr = nl.py_nla_parse_nested(nl80211.NL80211_FREQUENCY_ATTR_MAX, attr, pol)
    if nl80211.NL80211_FREQUENCY_ATTR_FREQ in fattr:
        freq = nl.nla_get_u32(fattr[nl80211.NL80211_FREQUENCY_ATTR_FREQ])
        sys.stdout.write("\t\tfreq %d MHz [%d]" % (freq, freq_to_ch(freq)))
    if nl80211.NL80211_FREQUENCY_ATTR_MAX_TX_POWER in fattr and not (
        nl80211.NL80211_FREQUENCY_ATTR_DISABLED in fattr
    ):
        sys.stdout.write(
            " (%.1f dBm)"
            % (
                0.01
                * nl.nla_get_u32(fattr[nl80211.NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
            )
        )
    if nl80211.NL80211_FREQUENCY_ATTR_DISABLED in fattr:
        sys.stdout.write(" (disabled)")
    sys.stdout.write("\n")


def handle_band(attr, fpol):
    e, battr = nl.py_nla_parse_nested(nl80211.NL80211_BAND_ATTR_MAX, attr, None)
    print("\tband %d:" % nl.nla_type(attr))
    if nl80211.NL80211_BAND_ATTR_FREQS in battr:
        for fattr in nl.nla_get_nested(battr[nl80211.NL80211_BAND_ATTR_FREQS]):
            handle_freq(fattr, fpol)


def cipher_name(suite):
    suite_val = "%02x%02x%02x%02x" % tuple(reversed(suite))
    if suite_val == "000fac01":
        return "WEP40 (00-0f-ac:1)"
    elif suite_val == "000fac05":
        return "WEP104 (00-0f-ac:5)"
    elif suite_val == "000fac02":
        return "TKIP (00-0f-ac:2)"
    elif suite_val == "000fac04":
        return "CCMP (00-0f-ac:4)"
    elif suite_val == "000fac06":
        return "CMAC (00-0f-ac:6)"
    elif suite_val == "000fac08":
        return "GCMP (00-0f-ac:8)"
    elif suite_val == "00147201":
        return "WPI-SMS4 (00-14-72:1)"
    else:
        return suite_val


def msg_handler(m, a):
    try:
        e, attr = genl.py_genlmsg_parse(
            nl.nlmsg_hdr(m), 0, nl80211.NL80211_ATTR_MAX, None
        )
        if nl80211.NL80211_ATTR_WIPHY_NAME in attr:
            print("wiphy %s" % nl.nla_get_string(attr[nl80211.NL80211_ATTR_WIPHY_NAME]))
        if nl80211.NL80211_ATTR_WIPHY_BANDS in attr:
            fpol = nl.nla_policy_array(nl80211.NL80211_FREQUENCY_ATTR_MAX + 1)
            fpol[nl80211.NL80211_FREQUENCY_ATTR_FREQ].type = nl.NLA_U32
            fpol[nl80211.NL80211_FREQUENCY_ATTR_DISABLED].type = nl.NLA_FLAG
            fpol[nl80211.NL80211_FREQUENCY_ATTR_PASSIVE_SCAN].type = nl.NLA_FLAG
            fpol[nl80211.NL80211_FREQUENCY_ATTR_NO_IBSS].type = nl.NLA_FLAG
            fpol[nl80211.NL80211_FREQUENCY_ATTR_RADAR].type = nl.NLA_FLAG
            fpol[nl80211.NL80211_FREQUENCY_ATTR_MAX_TX_POWER].type = nl.NLA_U32

            nattrs = nl.nla_get_nested(attr[nl80211.NL80211_ATTR_WIPHY_BANDS])
            for nattr in nattrs:
                handle_band(nattr, fpol)
        if nl80211.NL80211_ATTR_CIPHER_SUITES in attr:
            ciphers = nl.nla_data(attr[nl80211.NL80211_ATTR_CIPHER_SUITES])
            num = len(ciphers) / 4
            if num > 0:
                print("\tSupported Ciphers:")
                for i in range(0, num, 4):
                    print("\t\t* %s" % cipher_name(ciphers[i : i + 4]))
        if nl80211.NL80211_ATTR_SUPPORTED_IFTYPES in attr:
            print("\tSupported interface modes:")
            ifattr = nl.nla_get_nested(attr[nl80211.NL80211_ATTR_SUPPORTED_IFTYPES])
            for nl_mode in ifattr:
                print("\t\t* %s" % nl80211.nl80211_iftype2str[nl.nla_type(nl_mode)])
        if nl80211.NL80211_ATTR_SOFTWARE_IFTYPES in attr:
            print("\tsoftware interface modes (can always be added):")
            ifattr = nl.nla_get_nested(attr[nl80211.NL80211_ATTR_SOFTWARE_IFTYPES])
            for nl_mode in ifattr:
                print("\t\t* %s" % nl80211.nl80211_iftype2str[nl.nla_type(nl_mode)])
        return nl.NL_SKIP
    except Exception:
        (t, v, tb) = sys.exc_info()
        print(v.message)
        traceback.print_tb(tb)


def error_handler(err, a):
    a.done = err.error
    return nl.NL_STOP


def finish_handler(m, a):
    return nl.NL_SKIP


def ack_handler(m, a):
    a.done = 0
    return nl.NL_STOP


try:
    cbd = test_class()
    tx_cb = nl.nl_cb_alloc(nl.NL_CB_DEFAULT)
    rx_cb = nl.nl_cb_clone(tx_cb)
    s = nl.nl_socket_alloc_cb(tx_cb)
    nl.py_nl_cb_err(rx_cb, nl.NL_CB_CUSTOM, error_handler, cbd)
    nl.py_nl_cb_set(rx_cb, nl.NL_CB_FINISH, nl.NL_CB_CUSTOM, finish_handler, cbd)
    nl.py_nl_cb_set(rx_cb, nl.NL_CB_ACK, nl.NL_CB_CUSTOM, ack_handler, cbd)
    nl.py_nl_cb_set(rx_cb, nl.NL_CB_VALID, nl.NL_CB_CUSTOM, msg_handler, cbd)

    genl.genl_connect(s)
    family = genl.genl_ctrl_resolve(s, "nl80211")
    m = nl.nlmsg_alloc()
    genl.genlmsg_put(m, 0, 0, family, 0, 0, nl80211.NL80211_CMD_GET_WIPHY, 0)
    nl.nla_put_u32(m, nl80211.NL80211_ATTR_WIPHY, 7)

    err = nl.nl_send_auto_complete(s, m)
    if err < 0:
        nl.nlmsg_free(m)

    while cbd.done > 0 and not err < 0:
        err = nl.nl_recvmsgs(s, rx_cb)
except Exception:
    (t, v, tb) = sys.exc_info()
    print(v.message)
    traceback.print_tb(tb)