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scan: Add flag to flush case when starting a scan

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Add a flush flag to scan_parameters to tell the kernel to flush the
cache of scan results before the new scan.  Use this flag in the
active scan during roaming.
This commit is contained in:
Andrew Zaborowski 2017-01-31 03:42:57 +01:00 committed by Denis Kenzior
parent 3a4887fef4
commit 95e6623011
3 changed files with 10 additions and 2 deletions
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2
src/device.c
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@ -783,7 +783,7 @@ static void device_roam_scan_destroy(void *userdata)
static void device_roam_scan(struct device *device, static void device_roam_scan(struct device *device,
struct scan_freq_set *freq_set) struct scan_freq_set *freq_set)
{ {
struct scan_parameters params = { .freqs = freq_set }; struct scan_parameters params = { .freqs = freq_set, .flush = true };
/* Use an active scan to save time */ /* Use an active scan to save time */
device->roam_scan_id = scan_active_full(device->index, &params, device->roam_scan_id = scan_active_full(device->index, &params,

9
src/scan.c
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@ -285,13 +285,14 @@ static struct l_genl_msg *scan_build_cmd(uint32_t ifindex, bool passive,
{ {
struct l_genl_msg *msg; struct l_genl_msg *msg;
int n_channels = 0; int n_channels = 0;
uint32_t flags = 0;
if (params->freqs) if (params->freqs)
scan_freq_set_foreach(params->freqs, scan_freq_count, scan_freq_set_foreach(params->freqs, scan_freq_count,
&n_channels); &n_channels);
msg = l_genl_msg_new_sized(NL80211_CMD_TRIGGER_SCAN, msg = l_genl_msg_new_sized(NL80211_CMD_TRIGGER_SCAN,
32 + params->extra_ie_size + 64 + params->extra_ie_size +
4 * n_channels); 4 * n_channels);
l_genl_msg_append_attr(msg, NL80211_ATTR_IFINDEX, 4, &ifindex); l_genl_msg_append_attr(msg, NL80211_ATTR_IFINDEX, 4, &ifindex);
@ -309,6 +310,12 @@ static struct l_genl_msg *scan_build_cmd(uint32_t ifindex, bool passive,
if (params->freqs) if (params->freqs)
scan_build_attr_scan_frequencies(msg, params->freqs); scan_build_attr_scan_frequencies(msg, params->freqs);
if (params->flush)
flags |= NL80211_SCAN_FLAG_FLUSH;
if (flags)
l_genl_msg_append_attr(msg, NL80211_ATTR_SCAN_FLAGS, 4, &flags);
return msg; return msg;
} }

1
src/scan.h
View File

@ -68,6 +68,7 @@ struct scan_parameters {
const uint8_t *extra_ie; const uint8_t *extra_ie;
size_t extra_ie_size; size_t extra_ie_size;
struct scan_freq_set *freqs; struct scan_freq_set *freqs;
bool flush : 1;
}; };
uint32_t scan_passive(uint32_t ifindex, scan_trigger_func_t trigger, uint32_t scan_passive(uint32_t ifindex, scan_trigger_func_t trigger,