2 #include <netlink/genl/genl.h>
3 #include <netlink/genl/family.h>
4 #include <netlink/genl/ctrl.h>
5 #include <netlink/msg.h>
6 #include <netlink/attr.h>
7 #include <linux/nl80211.h>
13 static void print_flag(const char *name
, int *open
)
23 static int print_phy_handler(struct nl_msg
*msg
, void *arg
)
25 struct nlattr
*tb_msg
[NL80211_ATTR_MAX
+ 1];
26 struct genlmsghdr
*gnlh
= nlmsg_data(nlmsg_hdr(msg
));
28 struct nlattr
*tb_band
[NL80211_BAND_ATTR_MAX
+ 1];
30 struct nlattr
*tb_freq
[NL80211_FREQUENCY_ATTR_MAX
+ 1];
31 static struct nla_policy freq_policy
[NL80211_FREQUENCY_ATTR_MAX
+ 1] = {
32 [NL80211_FREQUENCY_ATTR_FREQ
] = { .type
= NLA_U32
},
33 [NL80211_FREQUENCY_ATTR_DISABLED
] = { .type
= NLA_FLAG
},
34 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN
] = { .type
= NLA_FLAG
},
35 [NL80211_FREQUENCY_ATTR_NO_IBSS
] = { .type
= NLA_FLAG
},
36 [NL80211_FREQUENCY_ATTR_RADAR
] = { .type
= NLA_FLAG
},
39 struct nlattr
*tb_rate
[NL80211_BITRATE_ATTR_MAX
+ 1];
40 static struct nla_policy rate_policy
[NL80211_BITRATE_ATTR_MAX
+ 1] = {
41 [NL80211_BITRATE_ATTR_RATE
] = { .type
= NLA_U32
},
42 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE
] = { .type
= NLA_FLAG
},
45 struct nlattr
*nl_band
;
46 struct nlattr
*nl_freq
;
47 struct nlattr
*nl_rate
;
49 int rem_band
, rem_freq
, rem_rate
;
52 nla_parse(tb_msg
, NL80211_ATTR_MAX
, genlmsg_attrdata(gnlh
, 0),
53 genlmsg_attrlen(gnlh
, 0), NULL
);
55 if (!tb_msg
[NL80211_ATTR_WIPHY_BANDS
])
58 nla_for_each_nested(nl_band
, tb_msg
[NL80211_ATTR_WIPHY_BANDS
], rem_band
) {
59 printf("Band %d:\n", bandidx
);
62 nla_parse(tb_band
, NL80211_BAND_ATTR_MAX
, nla_data(nl_band
),
63 nla_len(nl_band
), NULL
);
65 printf("\tFrequencies:\n");
67 nla_for_each_nested(nl_freq
, tb_band
[NL80211_BAND_ATTR_FREQS
], rem_freq
) {
68 nla_parse(tb_freq
, NL80211_FREQUENCY_ATTR_MAX
, nla_data(nl_freq
),
69 nla_len(nl_freq
), freq_policy
);
70 if (!tb_freq
[NL80211_FREQUENCY_ATTR_FREQ
])
72 printf("\t\t* %d MHz", nla_get_u32(tb_freq
[NL80211_FREQUENCY_ATTR_FREQ
]));
74 if (tb_freq
[NL80211_FREQUENCY_ATTR_DISABLED
])
75 print_flag("disabled", &open
);
76 if (tb_freq
[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN
])
77 print_flag("passive scanning", &open
);
78 if (tb_freq
[NL80211_FREQUENCY_ATTR_NO_IBSS
])
79 print_flag("no IBSS", &open
);
80 if (tb_freq
[NL80211_FREQUENCY_ATTR_RADAR
])
81 print_flag("radar detection", &open
);
87 printf("\tBitrates:\n");
89 nla_for_each_nested(nl_rate
, tb_band
[NL80211_BAND_ATTR_RATES
], rem_rate
) {
90 nla_parse(tb_rate
, NL80211_BITRATE_ATTR_MAX
, nla_data(nl_rate
),
91 nla_len(nl_rate
), rate_policy
);
92 if (!tb_rate
[NL80211_BITRATE_ATTR_RATE
])
94 printf("\t\t* %2.1f Mbps", 0.1 * nla_get_u32(tb_rate
[NL80211_BITRATE_ATTR_RATE
]));
96 if (tb_rate
[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE
])
97 print_flag("short preamble supported", &open
);
109 static int ack_wait_handler(struct nl_msg
*msg
, void *arg
)
117 int handle_info(struct nl80211_state
*state
, char *phy
, char *dev
)
121 struct nl_cb
*cb
= NULL
;
126 fprintf(stderr
, "failed to allocate netlink msg\n");
130 genlmsg_put(msg
, 0, 0, genl_family_get_id(state
->nl80211
), 0,
131 0, NL80211_CMD_GET_WIPHY
, 0);
133 NLA_PUT_U32(msg
, NL80211_ATTR_IFINDEX
, if_nametoindex(dev
));
135 return -1; /* XXX TODO */
137 cb
= nl_cb_alloc(NL_CB_CUSTOM
);
141 if (nl_send_auto_complete(state
->nl_handle
, msg
) < 0)
144 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, print_phy_handler
, NULL
);
145 nl_cb_set(cb
, NL_CB_ACK
, NL_CB_CUSTOM
, ack_wait_handler
, &finished
);
147 err
= nl_recvmsgs(state
->nl_handle
, cb
);
150 err
= nl_wait_for_ack(state
->nl_handle
);
160 fprintf(stderr
, "failed to get information: %d\n", err
);