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#include <net/if.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/family.h>
#include <netlink/genl/ctrl.h>
#include <netlink/msg.h>
#include <netlink/attr.h>
#include "nl80211.h"
#include "iw.h"
SECTION(survey);
static int print_survey_handler(struct nl_msg *msg, void *arg)
{
struct nlattr *tb[NL80211_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
char dev[20];
static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
[NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
[NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
};
nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), dev);
printf("Survey data from %s\n", dev);
if (!tb[NL80211_ATTR_SURVEY_INFO]) {
fprintf(stderr, "survey data missing!\n");
return NL_SKIP;
}
if (nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
tb[NL80211_ATTR_SURVEY_INFO],
survey_policy)) {
fprintf(stderr, "failed to parse nested attributes!\n");
return NL_SKIP;
}
if (sinfo[NL80211_SURVEY_INFO_FREQUENCY])
printf("\tfrequency:\t\t\t%u MHz%s\n",
nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]),
sinfo[NL80211_SURVEY_INFO_IN_USE] ? " [in use]" : "");
if (sinfo[NL80211_SURVEY_INFO_NOISE])
printf("\tnoise:\t\t\t\t%d dBm\n",
(int8_t)nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]));
if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME])
printf("\tchannel active time:\t\t%llu ms\n",
(unsigned long long)nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME]));
if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY])
printf("\tchannel busy time:\t\t%llu ms\n",
(unsigned long long)nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY]));
if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY])
printf("\textension channel busy time:\t%llu ms\n",
(unsigned long long)nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY]));
if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_RX])
printf("\tchannel receive time:\t\t%llu ms\n",
(unsigned long long)nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_RX]));
if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_TX])
printf("\tchannel transmit time:\t\t%llu ms\n",
(unsigned long long)nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_TX]));
return NL_SKIP;
}
static int handle_survey_dump(struct nl80211_state *state,
struct nl_msg *msg,
int argc, char **argv,
enum id_input id)
{
register_handler(print_survey_handler, NULL);
return 0;
}
COMMAND(survey, dump, NULL,
NL80211_CMD_GET_SURVEY, NLM_F_DUMP, CIB_NETDEV, handle_survey_dump,
"List all gathered channel survey data");
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