#include <net/tcp_states.h>
#include <linux/llc.h>
+static int llc_mac_header_len(unsigned short devtype)
+{
+ switch (devtype) {
+ case ARPHRD_ETHER:
+ case ARPHRD_LOOPBACK:
+ return sizeof(struct ethhdr);
+#ifdef CONFIG_TR
+ case ARPHRD_IEEE802_TR:
+ return sizeof(struct trh_hdr);
+#endif
+ }
+ return 0;
+}
+
/**
* llc_alloc_frame - allocates sk_buff for frame
* @dev: network device this skb will be sent over
+ * @type: pdu type to allocate
+ * @data_size: data size to allocate
*
* 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(struct sock *sk, struct net_device *dev)
+struct sk_buff *llc_alloc_frame(struct sock *sk, struct net_device *dev,
+ u8 type, u32 data_size)
{
- struct sk_buff *skb = alloc_skb(128, GFP_ATOMIC);
+ int hlen = type == LLC_PDU_TYPE_U ? 3 : 4;
+ struct sk_buff *skb;
+
+ hlen += llc_mac_header_len(dev->type);
+ skb = alloc_skb(hlen + data_size, GFP_ATOMIC);
if (skb) {
- skb_reserve(skb, 50);
- skb->nh.raw = skb->h.raw = skb->data;
+ skb_reset_mac_header(skb);
+ skb_reserve(skb, hlen);
+ skb_reset_network_header(skb);
+ skb_reset_transport_header(skb);
skb->protocol = htons(ETH_P_802_2);
skb->dev = dev;
- skb->mac.raw = skb->head;
if (sk != NULL)
skb_set_owner_w(skb, sk);
}
*
* Sends received pdus to the sap state machine.
*/
-static void llc_sap_rcv(struct llc_sap *sap, struct sk_buff *skb)
+static void llc_sap_rcv(struct llc_sap *sap, struct sk_buff *skb,
+ struct sock *sk)
{
struct llc_sap_state_ev *ev = llc_sap_ev(skb);
ev->type = LLC_SAP_EV_TYPE_PDU;
ev->reason = 0;
+ skb->sk = sk;
llc_sap_state_process(sap, skb);
}
break;
sock_hold(sk);
- skb_set_owner_r(skb1, sk);
- llc_sap_rcv(sap, skb1);
+ llc_sap_rcv(sap, skb1, sk);
sock_put(sk);
}
read_unlock_bh(&sap->sk_list.lock);
} else {
struct sock *sk = llc_lookup_dgram(sap, &laddr);
if (sk) {
- skb_set_owner_r(skb, sk);
- llc_sap_rcv(sap, skb);
+ llc_sap_rcv(sap, skb, sk);
sock_put(sk);
} else
kfree_skb(skb);