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