/**
* llc_alloc_frame - allocates sk_buff for frame
+ * @dev: network device this skb will be sent over
*
* Allocates an sk_buff for frame and initializes sk_buff fields.
* Returns allocated skb or %NULL when out of memory.
*/
-struct sk_buff *llc_alloc_frame(void)
+struct sk_buff *llc_alloc_frame(struct sock *sk, struct net_device *dev)
{
struct sk_buff *skb = alloc_skb(128, GFP_ATOMIC);
skb_reserve(skb, 50);
skb->nh.raw = skb->h.raw = skb->data;
skb->protocol = htons(ETH_P_802_2);
- skb->dev = dev_base->next;
+ skb->dev = dev;
skb->mac.raw = skb->head;
+ if (sk != NULL)
+ skb_set_owner_w(skb, sk);
}
return skb;
}
-void llc_save_primitive(struct sk_buff* skb, u8 prim)
+void llc_save_primitive(struct sock *sk, struct sk_buff* skb, u8 prim)
{
- struct sockaddr_llc *addr = llc_ui_skb_cb(skb);
+ struct sockaddr_llc *addr;
+ if (skb->sk->sk_type == SOCK_STREAM) /* See UNIX98 */
+ return;
/* save primitive for use by the user. */
- addr->sllc_family = skb->sk->sk_family;
+ addr = llc_ui_skb_cb(skb);
+ addr->sllc_family = sk->sk_family;
addr->sllc_arphrd = skb->dev->type;
addr->sllc_test = prim == LLC_TEST_PRIM;
addr->sllc_xid = prim == LLC_XID_PRIM;
if (skb->sk->sk_state == TCP_LISTEN)
kfree_skb(skb);
else {
- llc_save_primitive(skb, ev->prim);
+ llc_save_primitive(skb->sk, skb, ev->prim);
/* queue skb to the user. */
if (sock_queue_rcv_skb(skb->sk, skb))
* mac, and local sap. Returns pointer for socket found, %NULL otherwise.
*/
static struct sock *llc_lookup_dgram(struct llc_sap *sap,
- struct llc_addr *laddr)
+ const struct llc_addr *laddr)
{
struct sock *rc;
struct hlist_node *node;
return rc;
}
+/**
+ * llc_sap_mcast - Deliver multicast PDU's to all matching datagram sockets.
+ * @sap: SAP
+ * @laddr: address of local LLC (MAC + SAP)
+ *
+ * Search socket list of the SAP and finds connections with same sap.
+ * Deliver clone to each.
+ */
+static void llc_sap_mcast(struct llc_sap *sap,
+ const struct llc_addr *laddr,
+ struct sk_buff *skb)
+{
+ struct sock *sk;
+ struct hlist_node *node;
+
+ read_lock_bh(&sap->sk_list.lock);
+ sk_for_each(sk, node, &sap->sk_list.list) {
+ struct llc_sock *llc = llc_sk(sk);
+ struct sk_buff *skb1;
+
+ if (sk->sk_type != SOCK_DGRAM)
+ continue;
+
+ if (llc->laddr.lsap != laddr->lsap)
+ continue;
+
+ skb1 = skb_clone(skb, GFP_ATOMIC);
+ if (!skb1)
+ break;
+
+ sock_hold(sk);
+ skb_set_owner_r(skb1, sk);
+ llc_sap_rcv(sap, skb1);
+ sock_put(sk);
+ }
+ read_unlock_bh(&sap->sk_list.lock);
+}
+
+
void llc_sap_handler(struct llc_sap *sap, struct sk_buff *skb)
{
struct llc_addr laddr;
- struct sock *sk;
llc_pdu_decode_da(skb, laddr.mac);
llc_pdu_decode_dsap(skb, &laddr.lsap);
- sk = llc_lookup_dgram(sap, &laddr);
- if (sk) {
- skb->sk = sk;
- llc_sap_rcv(sap, skb);
- sock_put(sk);
- } else
+ if (llc_mac_multicast(laddr.mac)) {
+ llc_sap_mcast(sap, &laddr, skb);
kfree_skb(skb);
+ } else {
+ struct sock *sk = llc_lookup_dgram(sap, &laddr);
+ if (sk) {
+ skb_set_owner_r(skb, sk);
+ llc_sap_rcv(sap, skb);
+ sock_put(sk);
+ } else
+ kfree_skb(skb);
+ }
}