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impelment station binding to wlanid

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* add a kernel bash hash list to track station to
  radio and wlan id binding
* enforce binding on recv
* configure binding through netlink interface from
  WTP process
This commit is contained in:
Andreas Schultz
2016-02-18 19:36:22 +01:00
parent a6d0efe91a
commit cc5b38f322
10 changed files with 263 additions and 45 deletions
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64
src/wtp/kmod/capwap_private.c
View File

@ -16,8 +16,12 @@
/* */
int sc_capwap_init(struct sc_capwap_session *session, struct net *net)
{
int i;
TRACEKMOD("### sc_capwap_init\n");
ASSERT_RTNL();
/* Init session */
memset(session, 0, sizeof(struct sc_capwap_session));
@ -28,6 +32,9 @@ int sc_capwap_init(struct sc_capwap_session *session, struct net *net)
INIT_LIST_HEAD(&session->fragments.lru_list);
spin_lock_init(&session->fragments.lock);
for (i = 0; i < STA_HASH_SIZE; i++)
INIT_HLIST_HEAD(&session->station_list[i]);
return 0;
}
@ -225,29 +232,50 @@ void sc_capwap_parsingdatapacket(struct sc_capwap_session* session, struct sk_bu
/* Free broadcast packet */
kfree_skb(skb);
} else {
/* Accept only 802.11 frame or 802.3 frame with radio address */
if (is80211 || (radioaddr && (radioaddr->length == MACADDRESS_EUI48_LENGTH))){
if (!is80211) {
if (sc_capwap_8023_to_80211(skb, radioaddr->addr)) {
goto error;
}
}
uint32_t hash;
struct hlist_head *sta_head;
struct sc_station *sta;
/* */
dev = sc_netlink_getdev_from_bssid(session->net, GET_RID_HEADER(header), ((struct ieee80211_hdr*)skb->data)->addr2);
if (!dev) {
goto error;
}
hash = jhash(dstaddress, ETH_ALEN, GET_RID_HEADER(header)) % STA_HASH_SIZE;
sta_head = &session->station_list[hash];
TRACEKMOD("** Send packet to interface: %d\n", dev->ifindex);
rcu_read_lock();
/* Send packet */
local_bh_disable();
ieee80211_inject_xmit(skb, dev);
local_bh_enable();
} else {
sta = sc_find_station(sta_head, GET_RID_HEADER(header), dstaddress);
if (!sta) {
rcu_read_unlock();
TRACEKMOD("*** Radio Id for STA invalid: %d, %pM\n",
GET_RID_HEADER(header), dstaddress);
goto error;
}
dev = sc_netlink_getdev_from_wlanid(session->net, GET_RID_HEADER(header), sta->wlanid);
if (!dev) {
TRACEKMOD("*** no interface for Radio Id/WLAN Id: %d, %d\n",
GET_RID_HEADER(header), sta->wlanid);
rcu_read_unlock();
goto error;
}
rcu_read_unlock();
if (!is80211) {
if (sc_capwap_8023_to_80211(skb, dev->dev_addr)) {
goto error;
}
} else {
if (memcmp(dev->dev_addr, ((struct ieee80211_hdr*)skb->data)->addr2, ETH_ALEN) != 0) {
TRACEKMOD("*** Invalid BSSID in 802.11 packet\n");
goto error;
}
}
TRACEKMOD("** Send packet to interface: %d\n", dev->ifindex);
/* Send packet */
local_bh_disable();
ieee80211_inject_xmit(skb, dev);
local_bh_enable();
}
return;