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mac80211_hwsim: verify wmediumd socket 

There can't be two wmediumd instances controlling hwsim,
so reject registration from a second one and verify in
the commands that it's the correct instance calling.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2014-01-07 23:21:34 +01:00
parent de0421d53b
commit 85ca8fc746
1 changed files with 9 additions and 0 deletions
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9
drivers/net/wireless/mac80211_hwsim.c
View File

@ -2112,6 +2112,9 @@ static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
int i;
bool found = false;
if (info->snd_portid != wmediumd_portid)
return -EINVAL;
if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
!info->attrs[HWSIM_ATTR_FLAGS] ||
!info->attrs[HWSIM_ATTR_COOKIE] ||
@ -2185,6 +2188,9 @@ static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
void *frame_data;
struct sk_buff *skb = NULL;
if (info->snd_portid != wmediumd_portid)
return -EINVAL;
if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
!info->attrs[HWSIM_ATTR_FRAME] ||
!info->attrs[HWSIM_ATTR_RX_RATE] ||
@ -2237,6 +2243,9 @@ out:
static int hwsim_register_received_nl(struct sk_buff *skb_2,
struct genl_info *info)
{
if (wmediumd_portid)
return -EBUSY;
wmediumd_portid = info->snd_portid;
printk(KERN_DEBUG "mac80211_hwsim: received a REGISTER, "