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implement WPA2 Stations Key handling

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Implement the required support for extrace the cipher
suite settings from the the RS Information Element and
set the station key based on the 802.11 Station Key
CAPWAP message element.

Group Key update handling is currently not implemented nor is
Station Key update handling.
This commit is contained in:
Andreas Schultz
2016-07-27 12:34:32 +02:00
parent a131e17a6e
commit 2ac3944e7a
9 changed files with 360 additions and 17 deletions
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3
src/wtp/kmod/capwap.h
View File

@ -50,12 +50,15 @@ union capwap_addr {
struct sockaddr_storage ss;
};
#define STA_FLAG_AKM_ONLY 0x0001
struct sc_station {
struct hlist_node station_list;
uint8_t radioid;
uint8_t mac[ETH_ALEN];
uint8_t wlanid;
uint32_t flags;
struct rcu_head rcu_head;
};

18
src/wtp/kmod/netlinkapp.c
View File

@ -668,7 +668,8 @@ static int sc_netlink_add_station(struct sk_buff* skb, struct genl_info* info)
if (!info->attrs[NLSMARTCAPWAP_ATTR_RADIOID] ||
!info->attrs[NLSMARTCAPWAP_ATTR_MAC] ||
!info->attrs[NLSMARTCAPWAP_ATTR_WLANID])
!info->attrs[NLSMARTCAPWAP_ATTR_WLANID] ||
!info->attrs[NLSMARTCAPWAP_ATTR_FLAGS])
return -EINVAL;
radioid = nla_get_u8(info->attrs[NLSMARTCAPWAP_ATTR_RADIOID]);
@ -676,11 +677,17 @@ static int sc_netlink_add_station(struct sk_buff* skb, struct genl_info* info)
hash = jhash(mac, ETH_ALEN, radioid) % STA_HASH_SIZE;
sta_head = &session->station_list[hash];
if (sc_find_station(sta_head, radioid, mac) != NULL)
return -EEXIST;
sta = sc_find_station(sta_head, radioid, mac);
if (sta) {
if (!(info->nlhdr->nlmsg_flags & NLM_F_REPLACE))
return -EEXIST;
if (info->nlhdr->nlmsg_flags & NLM_F_REPLACE)
return -ENXIO;
if (sta->wlanid != nla_get_u8(info->attrs[NLSMARTCAPWAP_ATTR_WLANID]))
return -ENXIO;
sta->flags = nla_get_u32(info->attrs[NLSMARTCAPWAP_ATTR_FLAGS]);
return 0;
}
sta = kmalloc(sizeof(struct sc_station), GFP_KERNEL);
if (sta == NULL)
@ -689,6 +696,7 @@ static int sc_netlink_add_station(struct sk_buff* skb, struct genl_info* info)
sta->radioid = radioid;
memcpy(&sta->mac, mac, ETH_ALEN);
sta->wlanid = nla_get_u8(info->attrs[NLSMARTCAPWAP_ATTR_WLANID]);
sta->flags = nla_get_u32(info->attrs[NLSMARTCAPWAP_ATTR_FLAGS]);
hlist_add_head_rcu(&sta->station_list, sta_head);