[OpenWrt-Devel] [PATCH 2/2] iwinfo: nl80211: add survey.

[Daniel Danzberger]

Yes, everything returned by NL80211_CMD_GET_SURVEY.
Its equivalent to: # iw wlan0 survey dump

On 07/04/2018 10:32 PM, Nick wrote:
> I wanted to add this info too. See previous emails: "iwinfo: add channel
> survey"
> I think you are making the survey for all channels?
> My attention was only a survey for the used channel.
> 
> 
> On 03.07.2018 15:32, Daniel Danzberger wrote:
>> Signed-off-by: Daniel Danzberger <daniel at dd-wrt.com>
>> ---
>>  include/iwinfo.h | 11 ++++++++
>>  iwinfo_nl80211.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++++
>>  2 files changed, 80 insertions(+)
>>
>> diff --git a/include/iwinfo.h b/include/iwinfo.h
>> index 4111205..49ee7f0 100644
>> --- a/include/iwinfo.h
>> +++ b/include/iwinfo.h
>> @@ -128,6 +128,16 @@ struct iwinfo_assoclist_entry {
>>  	uint32_t thr;
>>  };
>>  
>> +struct iwinfo_survey_entry {
>> +	uint64_t active_time;
>> +	uint64_t busy_time;
>> +	uint64_t busy_time_ext;
>> +	uint64_t rxtime;
>> +	uint64_t txtime;
>> +	uint32_t mhz;
>> +	uint8_t noise;
>> +};
>> +
>>  struct iwinfo_txpwrlist_entry {
>>  	uint8_t  dbm;
>>  	uint16_t mw;
>> @@ -223,6 +233,7 @@ struct iwinfo_ops {
>>  	int (*scanlist)(const char *, char *, int *);
>>  	int (*freqlist)(const char *, char *, int *);
>>  	int (*countrylist)(const char *, char *, int *);
>> +	int (*survey)(const char *, char *, int *);
>>  	int (*lookup_phy)(const char *, char *);
>>  	void (*close)(void);
>>  };
>> diff --git a/iwinfo_nl80211.c b/iwinfo_nl80211.c
>> index 0e0206b..71465b5 100644
>> --- a/iwinfo_nl80211.c
>> +++ b/iwinfo_nl80211.c
>> @@ -1678,6 +1678,59 @@ static void nl80211_parse_rateinfo(struct nlattr **ri,
>>  	re->is_40mhz = (re->mhz == 40);
>>  }
>>  
>> +static int nl80211_get_survey_cb(struct nl_msg *msg, void *arg)
>> +{
>> +	struct nl80211_array_buf *arr = arg;
>> +	struct iwinfo_survey_entry *e = arr->buf;
>> +	struct nlattr **attr = nl80211_parse(msg);
>> +	struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
>> +	int rc;
>> +
>> +	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     },
>> +		[NL80211_SURVEY_INFO_TIME] = { .type = NLA_U64   },
>> +		[NL80211_SURVEY_INFO_TIME_BUSY] = { .type = NLA_U64   },
>> +		[NL80211_SURVEY_INFO_TIME_EXT_BUSY] = { .type = NLA_U64   },
>> +		[NL80211_SURVEY_INFO_TIME_RX] = { .type = NLA_U64   },
>> +		[NL80211_SURVEY_INFO_TIME_TX] = { .type = NLA_U64   },
>> +	};
>> +
>> +	rc = nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
>> +				attr[NL80211_ATTR_SURVEY_INFO],
>> +				survey_policy);
>> +	if (rc)
>> +		return NL_SKIP;
>> +
>> +	/* advance to end of array */
>> +	e += arr->count;
>> +	memset(e, 0, sizeof(*e));
>> +
>> +	if (sinfo[NL80211_SURVEY_INFO_FREQUENCY])
>> +		e->mhz = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]);
>> +
>> +        if (sinfo[NL80211_SURVEY_INFO_NOISE])
>> +		e->noise = nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
>> +
>> +        if (sinfo[NL80211_SURVEY_INFO_TIME])
>> +		e->active_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME]);
>> +
>> +        if (sinfo[NL80211_SURVEY_INFO_TIME_BUSY])
>> +		e->busy_time = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_BUSY]);
>> +
>> +        if (sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY])
>> +                e->busy_time_ext = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_EXT_BUSY]);
>> +
>> +        if (sinfo[NL80211_SURVEY_INFO_TIME_RX])
>> +                e->rxtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_RX]);
>> +
>> +        if (sinfo[NL80211_SURVEY_INFO_TIME_TX])
>> +		e->txtime = nla_get_u64(sinfo[NL80211_SURVEY_INFO_TIME_TX]);
>> +
>> +	arr->count++;
>> +	return NL_SKIP;
>> +}
>> +
>>  static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
>>  {
>>  	struct nl80211_array_buf *arr = arg;
>> @@ -1812,6 +1865,21 @@ static int nl80211_get_assoclist_cb(struct nl_msg *msg, void *arg)
>>  	return NL_SKIP;
>>  }
>>  
>> +static int nl80211_get_survey(const char *ifname, char *buf, int *len)
>> +{
>> +	struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
>> +	int rc;
>> +
>> +	rc = nl80211_request(ifname, NL80211_CMD_GET_SURVEY,
>> +			NLM_F_DUMP, nl80211_get_survey_cb, &arr);
>> +	if (!rc)
>> +		*len = (arr.count * sizeof(struct iwinfo_survey_entry));
>> +	else
>> +		*len = 0;
>> +
>> +	return 0;
>> +}
>> +
>>  static int nl80211_get_assoclist(const char *ifname, char *buf, int *len)
>>  {
>>  	DIR *d;
>> @@ -2862,6 +2930,7 @@ const struct iwinfo_ops nl80211_ops = {
>>  	.scanlist         = nl80211_get_scanlist,
>>  	.freqlist         = nl80211_get_freqlist,
>>  	.countrylist      = nl80211_get_countrylist,
>> +	.survey           = nl80211_get_survey,
>>  	.lookup_phy       = nl80211_lookup_phyname,
>>  	.close            = nl80211_close
>>  };
> 
> 
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> 

-- 
Regards

Daniel Danzberger
embeDD GmbH, Alter Postplatz 2, CH-6370 Stans

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