1 #include <net/if.h>
2
3 #include <netlink/genl/genl.h>
4 #include <netlink/genl/family.h>
5 #include <netlink/genl/ctrl.h>
6 #include <netlink/msg.h>
7 #include <netlink/attr.h>
8
9 #include "nl80211.h"
10 #include "iw.h"
11
12 SECTION(survey);
13
print_survey_handler(struct nl_msg * msg,void * arg)14 static int print_survey_handler(struct nl_msg *msg, void *arg)
15 {
16 struct nlattr *tb[NL80211_ATTR_MAX + 1];
17 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
18 struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
19 char dev[20];
20
21 static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
22 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
23 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
24 };
25
26 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
27 genlmsg_attrlen(gnlh, 0), NULL);
28
29 if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), dev);
30 printf("Survey data from %s\n", dev);
31
32 if (!tb[NL80211_ATTR_SURVEY_INFO]) {
33 fprintf(stderr, "survey data missing!\n");
34 return NL_SKIP;
35 }
36
37 if (nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
38 tb[NL80211_ATTR_SURVEY_INFO],
39 survey_policy)) {
40 fprintf(stderr, "failed to parse nested attributes!\n");
41 return NL_SKIP;
42 }
43
44 if (sinfo[NL80211_SURVEY_INFO_FREQUENCY])
45 printf("\tfrequency:\t\t\t%u MHz%s\n",
46 nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]),
47 sinfo[NL80211_SURVEY_INFO_IN_USE] ? " [in use]" : "");
48 if (sinfo[NL80211_SURVEY_INFO_NOISE])
49 printf("\tnoise:\t\t\t\t%d dBm\n",
50 (int8_t)nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]));
51 if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME])
52 printf("\tchannel active time:\t\t%llu ms\n",
53 (unsigned long long)nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME]));
54 if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY])
55 printf("\tchannel busy time:\t\t%llu ms\n",
56 (unsigned long long)nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY]));
57 if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY])
58 printf("\textension channel busy time:\t%llu ms\n",
59 (unsigned long long)nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY]));
60 if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_RX])
61 printf("\tchannel receive time:\t\t%llu ms\n",
62 (unsigned long long)nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_RX]));
63 if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_TX])
64 printf("\tchannel transmit time:\t\t%llu ms\n",
65 (unsigned long long)nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_TX]));
66 return NL_SKIP;
67 }
68
handle_survey_dump(struct nl80211_state * state,struct nl_msg * msg,int argc,char ** argv,enum id_input id)69 static int handle_survey_dump(struct nl80211_state *state,
70 struct nl_msg *msg,
71 int argc, char **argv,
72 enum id_input id)
73 {
74 if (argc > 1)
75 return HANDLER_RET_USAGE;
76
77 if (argc) {
78 if (!strcmp(argv[0], "--radio"))
79 nla_put_flag(msg, NL80211_ATTR_SURVEY_RADIO_STATS);
80 else
81 return HANDLER_RET_USAGE;
82 }
83
84 register_handler(print_survey_handler, NULL);
85 return 0;
86 }
87 COMMAND(survey, dump, "[--radio]",
88 NL80211_CMD_GET_SURVEY, NLM_F_DUMP, CIB_NETDEV, handle_survey_dump,
89 "List all gathered channel survey data");
90
91