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