1#include <net/if.h>
2#include <errno.h>
3#include <string.h>
4
5#include <netlink/genl/genl.h>
6#include <netlink/genl/family.h>
7#include <netlink/genl/ctrl.h>
8#include <netlink/msg.h>
9#include <netlink/attr.h>
10
11#include "nl80211.h"
12#include "iw.h"
13
14SECTION(survey);
15
16static int print_survey_handler(struct nl_msg *msg, void *arg)
17{
18	struct nlattr *tb[NL80211_ATTR_MAX + 1];
19	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
20	struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
21	char dev[20];
22
23	static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
24		[NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
25		[NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
26	};
27
28	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
29		  genlmsg_attrlen(gnlh, 0), NULL);
30
31	if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), dev);
32	printf("Survey data from %s\n", dev);
33
34	if (!tb[NL80211_ATTR_SURVEY_INFO]) {
35		fprintf(stderr, "survey data missing!\n");
36		return NL_SKIP;
37	}
38
39	if (nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
40			     tb[NL80211_ATTR_SURVEY_INFO],
41			     survey_policy)) {
42		fprintf(stderr, "failed to parse nested attributes!\n");
43		return NL_SKIP;
44	}
45
46	if (sinfo[NL80211_SURVEY_INFO_FREQUENCY])
47		printf("\tfrequency:\t\t\t%u MHz%s\n",
48			nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]),
49			sinfo[NL80211_SURVEY_INFO_IN_USE] ? " [in use]" : "");
50	if (sinfo[NL80211_SURVEY_INFO_NOISE])
51		printf("\tnoise:\t\t\t\t%d dBm\n",
52			(int8_t)nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]));
53	if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME])
54		printf("\tchannel active time:\t\t%llu ms\n",
55			(unsigned long long)nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME]));
56	if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY])
57		printf("\tchannel busy time:\t\t%llu ms\n",
58			(unsigned long long)nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY]));
59	if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY])
60		printf("\textension channel busy time:\t%llu ms\n",
61			(unsigned long long)nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY]));
62	if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_RX])
63		printf("\tchannel receive time:\t\t%llu ms\n",
64			(unsigned long long)nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_RX]));
65	if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_TX])
66		printf("\tchannel transmit time:\t\t%llu ms\n",
67			(unsigned long long)nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_TX]));
68	return NL_SKIP;
69}
70
71static int handle_survey_dump(struct nl80211_state *state,
72			      struct nl_cb *cb,
73			      struct nl_msg *msg,
74			      int argc, char **argv,
75			      enum id_input id)
76{
77	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_survey_handler, NULL);
78	return 0;
79}
80COMMAND(survey, dump, NULL,
81	NL80211_CMD_GET_SURVEY, NLM_F_DUMP, CIB_NETDEV, handle_survey_dump,
82	"List all gathered channel survey data");
83
84