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nl80211: request split information about frequencies

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This allows kernel send more details including all the
NL80211_FREQUENCY_ATTR_NO_* flags.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
This commit is contained in:
Rafał Miłecki 2017-08-23 11:00:00 +02:00
parent 5638567dc7
commit c1a03e8231
1 changed files with 36 additions and 2 deletions
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38
iwinfo_nl80211.c
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@ -425,6 +425,30 @@ static struct nlattr ** nl80211_parse(struct nl_msg *msg)
return attr;
}
static int nl80211_get_protocol_features_cb(struct nl_msg *msg, void *arg)
{
uint32_t *features = arg;
struct nlattr **attr = nl80211_parse(msg);
if (attr[NL80211_ATTR_PROTOCOL_FEATURES])
*features = nla_get_u32(attr[NL80211_ATTR_PROTOCOL_FEATURES]);
return NL_SKIP;
}
static int nl80211_get_protocol_features(const char *ifname)
{
struct nl80211_msg_conveyor *req;
uint32_t features = 0;
req = nl80211_msg(ifname, NL80211_CMD_GET_PROTOCOL_FEATURES, 0);
if (req) {
nl80211_send(req, nl80211_get_protocol_features_cb, &features);
nl80211_free(req);
}
return features;
}
static int nl80211_subscribe_cb(struct nl_msg *msg, void *arg)
{
@ -2426,15 +2450,25 @@ static int nl80211_get_freqlist_cb(struct nl_msg *msg, void *arg)
static int nl80211_get_freqlist(const char *ifname, char *buf, int *len)
{
struct nl80211_msg_conveyor *cv;
struct nl80211_array_buf arr = { .buf = buf, .count = 0 };
uint32_t features = nl80211_get_protocol_features(ifname);
int flags;
if (nl80211_request(ifname, NL80211_CMD_GET_WIPHY, 0,
nl80211_get_freqlist_cb, &arr))
flags = features & NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP ? NLM_F_DUMP : 0;
cv = nl80211_msg(ifname, NL80211_CMD_GET_WIPHY, flags);
if (!cv)
goto out;
NLA_PUT_FLAG(cv->msg, NL80211_ATTR_SPLIT_WIPHY_DUMP);
if (nl80211_send(cv, nl80211_get_freqlist_cb, &arr))
goto out;
*len = arr.count * sizeof(struct iwinfo_freqlist_entry);
return 0;
nla_put_failure:
nl80211_free(cv);
out:
*len = 0;
return -1;