nl80211: Share common function for scan parameters
trigger_scan and start_sched_scan can share code for building the common attributes. Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen
parent
f0494d0f95
commit
95ac3bf49f
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@ -3468,6 +3468,83 @@ static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
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}
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static struct nl_msg *
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nl80211_scan_common(struct wpa_driver_nl80211_data *drv, u8 cmd,
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struct wpa_driver_scan_params *params)
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{
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struct nl_msg *msg;
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int err;
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size_t i;
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msg = nlmsg_alloc();
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if (!msg)
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return NULL;
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nl80211_cmd(drv, msg, 0, cmd);
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if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, drv->ifindex) < 0)
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goto fail;
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if (params->num_ssids) {
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struct nl_msg *ssids = nlmsg_alloc();
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if (ssids == NULL)
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goto fail;
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for (i = 0; i < params->num_ssids; i++) {
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wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan SSID",
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params->ssids[i].ssid,
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params->ssids[i].ssid_len);
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if (nla_put(ssids, i + 1, params->ssids[i].ssid_len,
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params->ssids[i].ssid) < 0) {
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nlmsg_free(ssids);
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goto fail;
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}
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}
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err = nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
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nlmsg_free(ssids);
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if (err < 0)
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goto fail;
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}
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if (params->extra_ies) {
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wpa_hexdump(MSG_MSGDUMP, "nl80211: Scan extra IEs",
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params->extra_ies, params->extra_ies_len);
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if (nla_put(msg, NL80211_ATTR_IE, params->extra_ies_len,
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params->extra_ies) < 0)
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goto fail;
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}
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if (params->freqs) {
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struct nl_msg *freqs = nlmsg_alloc();
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if (freqs == NULL)
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goto fail;
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for (i = 0; params->freqs[i]; i++) {
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wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
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"MHz", params->freqs[i]);
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if (nla_put_u32(freqs, i + 1, params->freqs[i]) < 0) {
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nlmsg_free(freqs);
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goto fail;
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}
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}
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err = nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES,
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freqs);
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nlmsg_free(freqs);
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if (err < 0)
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goto fail;
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}
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os_free(drv->filter_ssids);
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drv->filter_ssids = params->filter_ssids;
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params->filter_ssids = NULL;
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drv->num_filter_ssids = params->num_filter_ssids;
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return msg;
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fail:
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nlmsg_free(msg);
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return NULL;
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}
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/**
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* wpa_driver_nl80211_scan - Request the driver to initiate scan
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* @priv: Pointer to private driver data from wpa_driver_nl80211_init()
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@ -3480,60 +3557,14 @@ static int wpa_driver_nl80211_scan(void *priv,
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struct i802_bss *bss = priv;
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struct wpa_driver_nl80211_data *drv = bss->drv;
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int ret = -1, timeout;
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struct nl_msg *msg, *ssids = NULL, *freqs = NULL, *rates = NULL;
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size_t i;
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struct nl_msg *msg, *rates = NULL;
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drv->scan_for_auth = 0;
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msg = nlmsg_alloc();
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msg = nl80211_scan_common(drv, NL80211_CMD_TRIGGER_SCAN, params);
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if (!msg)
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return -1;
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os_free(drv->filter_ssids);
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drv->filter_ssids = params->filter_ssids;
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params->filter_ssids = NULL;
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drv->num_filter_ssids = params->num_filter_ssids;
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nl80211_cmd(drv, msg, 0, NL80211_CMD_TRIGGER_SCAN);
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NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
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if (params->num_ssids) {
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ssids = nlmsg_alloc();
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if (ssids == NULL)
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goto nla_put_failure;
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for (i = 0; i < params->num_ssids; i++) {
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wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan SSID",
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params->ssids[i].ssid,
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params->ssids[i].ssid_len);
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NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
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params->ssids[i].ssid);
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}
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if (nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids) < 0)
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goto nla_put_failure;
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}
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if (params->extra_ies) {
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wpa_hexdump(MSG_MSGDUMP, "nl80211: Scan extra IEs",
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params->extra_ies, params->extra_ies_len);
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NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
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params->extra_ies);
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}
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if (params->freqs) {
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freqs = nlmsg_alloc();
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if (freqs == NULL)
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goto nla_put_failure;
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for (i = 0; params->freqs[i]; i++) {
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wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
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"MHz", params->freqs[i]);
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NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
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}
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if (nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs) <
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0)
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goto nla_put_failure;
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}
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if (params->p2p_probe) {
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wpa_printf(MSG_DEBUG, "nl80211: P2P probe - mask SuppRates");
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@ -3604,9 +3635,7 @@ static int wpa_driver_nl80211_scan(void *priv,
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drv, drv->ctx);
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nla_put_failure:
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nlmsg_free(ssids);
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nlmsg_free(msg);
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nlmsg_free(freqs);
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nlmsg_free(rates);
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return ret;
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}
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@ -3626,7 +3655,7 @@ static int wpa_driver_nl80211_sched_scan(void *priv,
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struct i802_bss *bss = priv;
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struct wpa_driver_nl80211_data *drv = bss->drv;
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int ret = -1;
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struct nl_msg *msg, *ssids = NULL, *freqs = NULL;
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struct nl_msg *msg;
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struct nl_msg *match_set_ssid = NULL, *match_sets = NULL;
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struct nl_msg *match_set_rssi = NULL;
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size_t i;
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@ -3636,19 +3665,10 @@ static int wpa_driver_nl80211_sched_scan(void *priv,
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return android_pno_start(bss, params);
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#endif /* ANDROID */
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msg = nlmsg_alloc();
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msg = nl80211_scan_common(drv, NL80211_CMD_START_SCHED_SCAN, params);
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if (!msg)
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goto nla_put_failure;
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os_free(drv->filter_ssids);
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drv->filter_ssids = params->filter_ssids;
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params->filter_ssids = NULL;
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drv->num_filter_ssids = params->num_filter_ssids;
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nl80211_cmd(drv, msg, 0, NL80211_CMD_START_SCHED_SCAN);
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NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
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NLA_PUT_U32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL, interval);
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if ((drv->num_filter_ssids &&
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@ -3696,43 +3716,6 @@ static int wpa_driver_nl80211_sched_scan(void *priv,
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goto nla_put_failure;
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}
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if (params->num_ssids) {
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ssids = nlmsg_alloc();
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if (ssids == NULL)
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goto nla_put_failure;
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for (i = 0; i < params->num_ssids; i++) {
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wpa_hexdump_ascii(MSG_MSGDUMP,
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"nl80211: Sched scan SSID",
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params->ssids[i].ssid,
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params->ssids[i].ssid_len);
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NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
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params->ssids[i].ssid);
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}
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if (nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids) < 0)
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goto nla_put_failure;
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}
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if (params->extra_ies) {
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wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Sched scan extra IEs",
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params->extra_ies, params->extra_ies_len);
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NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
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params->extra_ies);
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}
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if (params->freqs) {
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freqs = nlmsg_alloc();
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if (freqs == NULL)
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goto nla_put_failure;
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for (i = 0; params->freqs[i]; i++) {
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wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
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"MHz", params->freqs[i]);
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NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
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}
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if (nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs) <
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0)
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goto nla_put_failure;
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}
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ret = send_and_recv_msgs(drv, msg, NULL, NULL);
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/* TODO: if we get an error here, we should fall back to normal scan */
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@ -3751,9 +3734,7 @@ nla_put_failure:
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nlmsg_free(match_set_ssid);
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nlmsg_free(match_sets);
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nlmsg_free(match_set_rssi);
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nlmsg_free(ssids);
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nlmsg_free(msg);
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nlmsg_free(freqs);
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return ret;
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}
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