Commit | Line | Data |
---|---|---|
635d2b00 GKH |
1 | /* |
2 | * --------------------------------------------------------------------------- | |
3 | * FILE: inet.c | |
4 | * | |
5 | * PURPOSE: | |
6 | * Routines related to IP address changes. | |
7 | * Optional part of the porting exercise. It uses system network | |
8 | * handlers to obtain the UniFi IP address and pass it to the SME | |
9 | * using the unifi_sys_ip_configured_ind(). | |
10 | * | |
11 | * Copyright (C) 2008-2009 Cambridge Silicon Radio Ltd. | |
12 | * | |
13 | * Refer to LICENSE.txt included with this source code for details on | |
14 | * the license terms. | |
15 | * | |
16 | * --------------------------------------------------------------------------- | |
17 | */ | |
18 | #include <linux/inetdevice.h> | |
19 | #include <linux/notifier.h> | |
20 | ||
21 | #include "unifi_priv.h" | |
22 | #include "csr_wifi_hip_conversions.h" | |
23 | ||
24 | /* | |
25 | * The inet notifier is global and not per-netdev. To avoid having a | |
26 | * notifier registered when there are no unifi devices present, it's | |
27 | * registered after the first unifi network device is registered, and | |
28 | * unregistered when the last unifi network device is unregistered. | |
29 | */ | |
30 | ||
31 | static atomic_t inet_notif_refs = ATOMIC_INIT(0); | |
32 | ||
33 | static int uf_inetaddr_event(struct notifier_block *notif, unsigned long event, void *ifa) | |
34 | { | |
35 | struct net_device *ndev; | |
36 | unifi_priv_t *priv; | |
37 | struct in_ifaddr *if_addr; | |
38 | netInterface_priv_t *InterfacePriv = (netInterface_priv_t *)NULL; | |
39 | ||
40 | if (!ifa || !((struct in_ifaddr *)ifa)->ifa_dev) { | |
41 | unifi_trace(NULL, UDBG1, "uf_inetaddr_event (%lu) ifa=%p\n", event, ifa); | |
42 | return NOTIFY_DONE; | |
43 | } | |
44 | ||
45 | ndev = ((struct in_ifaddr *)ifa)->ifa_dev->dev; | |
46 | InterfacePriv = (netInterface_priv_t*) netdev_priv(ndev); | |
47 | ||
48 | /* As the notifier is global, the call may be for a non-UniFi netdev. | |
49 | * Therefore check the netdev_priv to make sure it's a known UniFi one. | |
50 | */ | |
51 | if (uf_find_netdev_priv(InterfacePriv) == -1) { | |
52 | unifi_trace(NULL, UDBG1, "uf_inetaddr_event (%lu) ndev=%p, other netdev_priv=%p\n", | |
53 | event, ndev, InterfacePriv); | |
54 | return NOTIFY_DONE; | |
55 | } | |
56 | ||
57 | if (!InterfacePriv->privPtr) { | |
58 | unifi_error(NULL, "uf_inetaddr_event null priv (%lu) ndev=%p, InterfacePriv=%p\n", | |
59 | event, ndev, InterfacePriv); | |
60 | return NOTIFY_DONE; | |
61 | } | |
62 | ||
63 | priv = InterfacePriv->privPtr; | |
64 | if_addr = (struct in_ifaddr *)ifa; | |
65 | ||
66 | /* If this event is for a UniFi device, notify the SME that an IP | |
67 | * address has been added or removed. */ | |
68 | if (uf_find_priv(priv) != -1) { | |
69 | switch (event) { | |
70 | case NETDEV_UP: | |
71 | unifi_info(priv, "IP address assigned for %s\n", priv->netdev[InterfacePriv->InterfaceTag]->name); | |
72 | priv->sta_ip_address = if_addr->ifa_address; | |
73 | #ifdef CSR_SUPPORT_WEXT | |
74 | sme_mgt_packet_filter_set(priv); | |
75 | #endif | |
76 | break; | |
77 | case NETDEV_DOWN: | |
78 | unifi_info(priv, "IP address removed for %s\n", priv->netdev[InterfacePriv->InterfaceTag]->name); | |
79 | priv->sta_ip_address = 0xFFFFFFFF; | |
80 | #ifdef CSR_SUPPORT_WEXT | |
81 | sme_mgt_packet_filter_set(priv); | |
82 | #endif | |
83 | break; | |
84 | } | |
85 | } | |
86 | ||
87 | return NOTIFY_DONE; | |
88 | } | |
89 | ||
90 | static struct notifier_block uf_inetaddr_notifier = { | |
91 | .notifier_call = uf_inetaddr_event, | |
92 | }; | |
93 | ||
94 | void uf_register_inet_notifier(void) | |
95 | { | |
79caaba6 DN |
96 | if (atomic_inc_return(&inet_notif_refs) == 1) |
97 | register_inetaddr_notifier(&uf_inetaddr_notifier); | |
635d2b00 GKH |
98 | } |
99 | ||
100 | void uf_unregister_inet_notifier(void) | |
101 | { | |
79caaba6 DN |
102 | if (atomic_dec_return(&inet_notif_refs) == 0) |
103 | unregister_inetaddr_notifier(&uf_inetaddr_notifier); | |
635d2b00 | 104 | } |