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wiphy: Add scheduled scan support

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Add rudimentary support for mac80211 scheduled scan feature.
This is done so that kernel support for task called "Bind
NL80211_CMD_START_SCHED_SCAN to netlink socket" from TODO
file can be tested. The current scan interval is set to 60
seconds which is probably too fast for the final version.
This commit is contained in:
Jukka Rissanen 2014-11-05 17:18:28 +02:00 committed by Denis Kenzior
parent 054125593d
commit 672be730c3
1 changed files with 89 additions and 2 deletions
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91
src/wiphy.c
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@ -26,6 +26,7 @@
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <sys/socket.h>
#include <linux/if.h>
#include <linux/if_ether.h>
@ -41,6 +42,7 @@ static const char *network_ssid = NULL;
static struct l_genl *genl = NULL;
static struct l_genl_family *nl80211 = NULL;
static int scheduled_scan_interval = 60; /* in secs */
struct bss {
uint8_t addr[ETH_ALEN];
@ -69,6 +71,7 @@ struct wiphy {
char name[20];
uint32_t feature_flags;
struct l_queue *netdev_list;
bool support_scheduled_scan;
};
static struct l_queue *wiphy_list = NULL;
@ -729,6 +732,59 @@ static void get_scan(struct netdev *netdev)
l_genl_msg_unref(msg);
}
static void sched_scan_callback(struct l_genl_msg *msg, void *user_data)
{
struct l_genl_attr attr;
uint16_t type, len;
const void *data;
if (!l_genl_attr_init(&attr, msg)) {
int err = l_genl_msg_get_error(msg);
if (err < 0 && err != -EINPROGRESS) {
l_warn("Failed to setup scheduled scan [%d/%s]",
-err, strerror(-err));
goto done;
}
l_info("Scheduled scan started");
} else {
while (l_genl_attr_next(&attr, &type, &len, &data)) {
}
}
done:
return;
}
static void setup_scheduled_scan(struct wiphy *wiphy, struct netdev *netdev,
uint32_t scan_interval)
{
struct l_genl_msg *msg;
uint16_t len = 4 + 4 + 4;
if (!wiphy->support_scheduled_scan) {
l_debug("Scheduled scan not supported for %s "
"iface %s ifindex %u", wiphy->name, netdev->name,
netdev->index);
return;
}
len += 4;
scan_interval *= 1000; /* in kernel the interval is in msecs */
msg = l_genl_msg_new_sized(NL80211_CMD_START_SCHED_SCAN, len);
l_genl_msg_append_attr(msg, NL80211_ATTR_IFINDEX, 4, &netdev->index);
l_genl_msg_append_attr(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
4, &scan_interval);
l_genl_msg_append_attr(msg, NL80211_ATTR_SCAN_SOCKET_OWNER, 0, NULL);
if (!l_genl_family_send(nl80211, msg, sched_scan_callback, NULL, NULL))
l_error("Starting scheduled scan failed");
l_genl_msg_unref(msg);
}
static void interface_dump_callback(struct l_genl_msg *msg, void *user_data)
{
struct wiphy *wiphy = NULL;
@ -841,13 +897,32 @@ static void interface_dump_callback(struct l_genl_msg *msg, void *user_data)
device_emit_added(netdev);
}
setup_scheduled_scan(wiphy, netdev, scheduled_scan_interval);
l_debug("Found interface %s", netdev->name);
}
static void parse_supported_commands(struct wiphy *wiphy,
struct l_genl_attr *attr)
{
uint16_t type, len;
const void *data;
while (l_genl_attr_next(attr, &type, &len, &data)) {
uint32_t cmd = *(uint32_t *)data;
switch (cmd) {
case NL80211_CMD_START_SCHED_SCAN:
wiphy->support_scheduled_scan = true;
break;
}
}
}
static void wiphy_dump_callback(struct l_genl_msg *msg, void *user_data)
{
struct wiphy *wiphy = NULL;
struct l_genl_attr attr;
struct l_genl_attr attr, nested;
uint16_t type, len;
const void *data;
uint32_t id;
@ -916,6 +991,17 @@ static void wiphy_dump_callback(struct l_genl_msg *msg, void *user_data)
wiphy->feature_flags = *((uint32_t *) data);
break;
case NL80211_ATTR_SUPPORTED_COMMANDS:
if (!wiphy) {
l_warn("No wiphy structure found");
return;
}
if (!l_genl_attr_recurse(&attr, &nested))
return;
parse_supported_commands(wiphy, &nested);
break;
}
}
}
@ -1005,7 +1091,8 @@ static void wiphy_scan_notify(struct l_genl_msg *msg, void *user_data)
return;
}
if (cmd == NL80211_CMD_NEW_SCAN_RESULTS) {
if (cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
cmd == NL80211_CMD_SCHED_SCAN_RESULTS) {
get_scan(netdev);
return;
}