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cfg80211: issue netlink notification when scan starts

Browse source 
To ease multiple apps working together smoothly,
send a notification when a scan is started.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2009-06-16 19:56:42 +02:00 committed by John W. Linville
parent 222ec50a0a
commit a538e2d5a3
3 changed files with 34 additions and 10 deletions
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39
net/wireless/nl80211.c
View file

@ -2839,6 +2839,9 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
drv->scan_req = request;
err = drv->ops->scan(&drv->wiphy, dev, request);
if (!err)
nl80211_send_scan_start(drv, dev);
out_free:
if (err) {
drv->scan_req = NULL;
@ -3665,11 +3668,11 @@ static int nl80211_add_scan_req(struct sk_buff *msg,
return -ENOBUFS;
}
static int nl80211_send_scan_donemsg(struct sk_buff *msg,
struct cfg80211_registered_device *rdev,
struct net_device *netdev,
u32 pid, u32 seq, int flags,
u32 cmd)
static int nl80211_send_scan_msg(struct sk_buff *msg,
struct cfg80211_registered_device *rdev,
struct net_device *netdev,
u32 pid, u32 seq, int flags,
u32 cmd)
{
void *hdr;
@ -3690,6 +3693,24 @@ static int nl80211_send_scan_donemsg(struct sk_buff *msg,
return -EMSGSIZE;
}
void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
struct net_device *netdev)
{
struct sk_buff *msg;
msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (!msg)
return;
if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
NL80211_CMD_TRIGGER_SCAN) < 0) {
nlmsg_free(msg);
return;
}
genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
}
void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
struct net_device *netdev)
{
@ -3699,8 +3720,8 @@ void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
if (!msg)
return;
if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0,
NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
nlmsg_free(msg);
return;
}
@ -3717,8 +3738,8 @@ void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
if (!msg)
return;
if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0,
NL80211_CMD_SCAN_ABORTED) < 0) {
if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
NL80211_CMD_SCAN_ABORTED) < 0) {
nlmsg_free(msg);
return;
}

2
net/wireless/nl80211.h
View file

@ -6,6 +6,8 @@
extern int nl80211_init(void);
extern void nl80211_exit(void);
extern void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev);
extern void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
struct net_device *netdev);
extern void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
struct net_device *netdev);
extern void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,

3
net/wireless/scan.c
View file

@ -647,7 +647,8 @@ int cfg80211_wext_siwscan(struct net_device *dev,
if (err) {
rdev->scan_req = NULL;
kfree(creq);
}
} else
nl80211_send_scan_start(rdev, dev);
out:
cfg80211_put_dev(rdev);
return err;