xref: /aosp_15_r20/external/libnl/python/examples/wiphy.py (revision 4dc78e53d49367fa8e61b07018507c90983a077d)
1from __future__ import print_function
2import netlink.capi as nl
3import netlink.genl.capi as genl
4import nl80211
5import sys
6import traceback
7
8
9class test_class:
10    def __init__(self):
11        self.done = 1
12
13
14def freq_to_ch(freq):
15    if freq == 2484:
16        return 14
17
18    if freq < 2484:
19        return (freq - 2407) / 5
20
21    # FIXME: dot11ChannelStartingFactor (802.11-2007 17.3.8.3.2)
22    if freq < 45000:
23        return freq / 5 - 1000
24
25    if freq >= 58320 and freq <= 64800:
26        return (freq - 56160) / 2160
27
28    return 0
29
30
31def handle_freq(attr, pol):
32    e, fattr = nl.py_nla_parse_nested(nl80211.NL80211_FREQUENCY_ATTR_MAX, attr, pol)
33    if nl80211.NL80211_FREQUENCY_ATTR_FREQ in fattr:
34        freq = nl.nla_get_u32(fattr[nl80211.NL80211_FREQUENCY_ATTR_FREQ])
35        sys.stdout.write("\t\tfreq %d MHz [%d]" % (freq, freq_to_ch(freq)))
36    if nl80211.NL80211_FREQUENCY_ATTR_MAX_TX_POWER in fattr and not (
37        nl80211.NL80211_FREQUENCY_ATTR_DISABLED in fattr
38    ):
39        sys.stdout.write(
40            " (%.1f dBm)"
41            % (
42                0.01
43                * nl.nla_get_u32(fattr[nl80211.NL80211_FREQUENCY_ATTR_MAX_TX_POWER])
44            )
45        )
46    if nl80211.NL80211_FREQUENCY_ATTR_DISABLED in fattr:
47        sys.stdout.write(" (disabled)")
48    sys.stdout.write("\n")
49
50
51def handle_band(attr, fpol):
52    e, battr = nl.py_nla_parse_nested(nl80211.NL80211_BAND_ATTR_MAX, attr, None)
53    print("\tband %d:" % nl.nla_type(attr))
54    if nl80211.NL80211_BAND_ATTR_FREQS in battr:
55        for fattr in nl.nla_get_nested(battr[nl80211.NL80211_BAND_ATTR_FREQS]):
56            handle_freq(fattr, fpol)
57
58
59def cipher_name(suite):
60    suite_val = "%02x%02x%02x%02x" % tuple(reversed(suite))
61    if suite_val == "000fac01":
62        return "WEP40 (00-0f-ac:1)"
63    elif suite_val == "000fac05":
64        return "WEP104 (00-0f-ac:5)"
65    elif suite_val == "000fac02":
66        return "TKIP (00-0f-ac:2)"
67    elif suite_val == "000fac04":
68        return "CCMP (00-0f-ac:4)"
69    elif suite_val == "000fac06":
70        return "CMAC (00-0f-ac:6)"
71    elif suite_val == "000fac08":
72        return "GCMP (00-0f-ac:8)"
73    elif suite_val == "00147201":
74        return "WPI-SMS4 (00-14-72:1)"
75    else:
76        return suite_val
77
78
79def msg_handler(m, a):
80    try:
81        e, attr = genl.py_genlmsg_parse(
82            nl.nlmsg_hdr(m), 0, nl80211.NL80211_ATTR_MAX, None
83        )
84        if nl80211.NL80211_ATTR_WIPHY_NAME in attr:
85            print("wiphy %s" % nl.nla_get_string(attr[nl80211.NL80211_ATTR_WIPHY_NAME]))
86        if nl80211.NL80211_ATTR_WIPHY_BANDS in attr:
87            fpol = nl.nla_policy_array(nl80211.NL80211_FREQUENCY_ATTR_MAX + 1)
88            fpol[nl80211.NL80211_FREQUENCY_ATTR_FREQ].type = nl.NLA_U32
89            fpol[nl80211.NL80211_FREQUENCY_ATTR_DISABLED].type = nl.NLA_FLAG
90            fpol[nl80211.NL80211_FREQUENCY_ATTR_PASSIVE_SCAN].type = nl.NLA_FLAG
91            fpol[nl80211.NL80211_FREQUENCY_ATTR_NO_IBSS].type = nl.NLA_FLAG
92            fpol[nl80211.NL80211_FREQUENCY_ATTR_RADAR].type = nl.NLA_FLAG
93            fpol[nl80211.NL80211_FREQUENCY_ATTR_MAX_TX_POWER].type = nl.NLA_U32
94
95            nattrs = nl.nla_get_nested(attr[nl80211.NL80211_ATTR_WIPHY_BANDS])
96            for nattr in nattrs:
97                handle_band(nattr, fpol)
98        if nl80211.NL80211_ATTR_CIPHER_SUITES in attr:
99            ciphers = nl.nla_data(attr[nl80211.NL80211_ATTR_CIPHER_SUITES])
100            num = len(ciphers) / 4
101            if num > 0:
102                print("\tSupported Ciphers:")
103                for i in range(0, num, 4):
104                    print("\t\t* %s" % cipher_name(ciphers[i : i + 4]))
105        if nl80211.NL80211_ATTR_SUPPORTED_IFTYPES in attr:
106            print("\tSupported interface modes:")
107            ifattr = nl.nla_get_nested(attr[nl80211.NL80211_ATTR_SUPPORTED_IFTYPES])
108            for nl_mode in ifattr:
109                print("\t\t* %s" % nl80211.nl80211_iftype2str[nl.nla_type(nl_mode)])
110        if nl80211.NL80211_ATTR_SOFTWARE_IFTYPES in attr:
111            print("\tsoftware interface modes (can always be added):")
112            ifattr = nl.nla_get_nested(attr[nl80211.NL80211_ATTR_SOFTWARE_IFTYPES])
113            for nl_mode in ifattr:
114                print("\t\t* %s" % nl80211.nl80211_iftype2str[nl.nla_type(nl_mode)])
115        return nl.NL_SKIP
116    except Exception:
117        (t, v, tb) = sys.exc_info()
118        print(v.message)
119        traceback.print_tb(tb)
120
121
122def error_handler(err, a):
123    a.done = err.error
124    return nl.NL_STOP
125
126
127def finish_handler(m, a):
128    return nl.NL_SKIP
129
130
131def ack_handler(m, a):
132    a.done = 0
133    return nl.NL_STOP
134
135
136try:
137    cbd = test_class()
138    tx_cb = nl.nl_cb_alloc(nl.NL_CB_DEFAULT)
139    rx_cb = nl.nl_cb_clone(tx_cb)
140    s = nl.nl_socket_alloc_cb(tx_cb)
141    nl.py_nl_cb_err(rx_cb, nl.NL_CB_CUSTOM, error_handler, cbd)
142    nl.py_nl_cb_set(rx_cb, nl.NL_CB_FINISH, nl.NL_CB_CUSTOM, finish_handler, cbd)
143    nl.py_nl_cb_set(rx_cb, nl.NL_CB_ACK, nl.NL_CB_CUSTOM, ack_handler, cbd)
144    nl.py_nl_cb_set(rx_cb, nl.NL_CB_VALID, nl.NL_CB_CUSTOM, msg_handler, cbd)
145
146    genl.genl_connect(s)
147    family = genl.genl_ctrl_resolve(s, "nl80211")
148    m = nl.nlmsg_alloc()
149    genl.genlmsg_put(m, 0, 0, family, 0, 0, nl80211.NL80211_CMD_GET_WIPHY, 0)
150    nl.nla_put_u32(m, nl80211.NL80211_ATTR_WIPHY, 7)
151
152    err = nl.nl_send_auto_complete(s, m)
153    if err < 0:
154        nl.nlmsg_free(m)
155
156    while cbd.done > 0 and not err < 0:
157        err = nl.nl_recvmsgs(s, rx_cb)
158except Exception:
159    (t, v, tb) = sys.exc_info()
160    print(v.message)
161    traceback.print_tb(tb)
162