From c1a03e8231a5d8b348b70a182d256725c98a3b0b Mon Sep 17 00:00:00 2001 From: =?utf8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Wed, 23 Aug 2017 11:00:00 +0200 Subject: [PATCH] nl80211: request split information about frequencies MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This allows kernel send more details including all the NL80211_FREQUENCY_ATTR_NO_* flags. Signed-off-by: Rafał Miłecki --- iwinfo_nl80211.c | 38 ++++++++++++++++++++++++++++++++++++-- 1 file changed, 36 insertions(+), 2 deletions(-) diff --git a/iwinfo_nl80211.c b/iwinfo_nl80211.c index 6bc1318..2776531 100644 --- a/iwinfo_nl80211.c +++ b/iwinfo_nl80211.c @@ -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; -- 2.11.0