1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/*
* ---------------------------------------------------------------------------
* FILE: inet.c
*
* PURPOSE:
* Routines related to IP address changes.
* Optional part of the porting exercise. It uses system network
* handlers to obtain the UniFi IP address and pass it to the SME
* using the unifi_sys_ip_configured_ind().
*
* Copyright (C) 2008-2009 Cambridge Silicon Radio Ltd.
*
* Refer to LICENSE.txt included with this source code for details on
* the license terms.
*
* ---------------------------------------------------------------------------
*/
#include <linux/inetdevice.h>
#include <linux/notifier.h>
#include "unifi_priv.h"
#include "csr_wifi_hip_conversions.h"
/*
* The inet notifier is global and not per-netdev. To avoid having a
* notifier registered when there are no unifi devices present, it's
* registered after the first unifi network device is registered, and
* unregistered when the last unifi network device is unregistered.
*/
static atomic_t inet_notif_refs = ATOMIC_INIT(0);
static int uf_inetaddr_event(struct notifier_block *notif, unsigned long event, void *ifa)
{
struct net_device *ndev;
unifi_priv_t *priv;
struct in_ifaddr *if_addr;
netInterface_priv_t *InterfacePriv = (netInterface_priv_t *)NULL;
if (!ifa || !((struct in_ifaddr *)ifa)->ifa_dev) {
unifi_trace(NULL, UDBG1, "uf_inetaddr_event (%lu) ifa=%p\n", event, ifa);
return NOTIFY_DONE;
}
ndev = ((struct in_ifaddr *)ifa)->ifa_dev->dev;
InterfacePriv = (netInterface_priv_t*) netdev_priv(ndev);
/* As the notifier is global, the call may be for a non-UniFi netdev.
* Therefore check the netdev_priv to make sure it's a known UniFi one.
*/
if (uf_find_netdev_priv(InterfacePriv) == -1) {
unifi_trace(NULL, UDBG1, "uf_inetaddr_event (%lu) ndev=%p, other netdev_priv=%p\n",
event, ndev, InterfacePriv);
return NOTIFY_DONE;
}
if (!InterfacePriv->privPtr) {
unifi_error(NULL, "uf_inetaddr_event null priv (%lu) ndev=%p, InterfacePriv=%p\n",
event, ndev, InterfacePriv);
return NOTIFY_DONE;
}
priv = InterfacePriv->privPtr;
if_addr = (struct in_ifaddr *)ifa;
/* If this event is for a UniFi device, notify the SME that an IP
* address has been added or removed. */
if (uf_find_priv(priv) != -1) {
switch (event) {
case NETDEV_UP:
unifi_info(priv, "IP address assigned for %s\n", priv->netdev[InterfacePriv->InterfaceTag]->name);
priv->sta_ip_address = if_addr->ifa_address;
#ifdef CSR_SUPPORT_WEXT
sme_mgt_packet_filter_set(priv);
#endif
break;
case NETDEV_DOWN:
unifi_info(priv, "IP address removed for %s\n", priv->netdev[InterfacePriv->InterfaceTag]->name);
priv->sta_ip_address = 0xFFFFFFFF;
#ifdef CSR_SUPPORT_WEXT
sme_mgt_packet_filter_set(priv);
#endif
break;
}
}
return NOTIFY_DONE;
}
static struct notifier_block uf_inetaddr_notifier = {
.notifier_call = uf_inetaddr_event,
};
void uf_register_inet_notifier(void)
{
if (atomic_inc_return(&inet_notif_refs) == 1)
register_inetaddr_notifier(&uf_inetaddr_notifier);
}
void uf_unregister_inet_notifier(void)
{
if (atomic_dec_return(&inet_notif_refs) == 0)
unregister_inetaddr_notifier(&uf_inetaddr_notifier);
}
|
