struct sk_buff *skb;
struct nfc_dev *dev;
struct nfc_llcp_local *local;
- u16 size = 0;
pr_debug("Sending DISC\n");
if (dev == NULL)
return -ENODEV;
- size += LLCP_HEADER_SIZE;
- size += dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE;
-
- skb = alloc_skb(size, GFP_ATOMIC);
+ skb = llcp_allocate_pdu(sock, LLCP_PDU_DISC, 0);
if (skb == NULL)
return -ENOMEM;
- skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE);
-
- skb = llcp_add_header(skb, sock->dsap, sock->ssap, LLCP_PDU_DISC);
-
skb_queue_tail(&local->tx_queue, skb);
return 0;
return err;
}
+int nfc_llcp_send_snl(struct nfc_llcp_local *local, u8 tid, u8 sap)
+{
+ struct sk_buff *skb;
+ struct nfc_dev *dev;
+ u8 *sdres_tlv = NULL, sdres_tlv_length, sdres[2];
+ u16 size = 0;
+
+ pr_debug("Sending SNL tid 0x%x sap 0x%x\n", tid, sap);
+
+ if (local == NULL)
+ return -ENODEV;
+
+ dev = local->dev;
+ if (dev == NULL)
+ return -ENODEV;
+
+ sdres[0] = tid;
+ sdres[1] = sap;
+ sdres_tlv = nfc_llcp_build_tlv(LLCP_TLV_SDRES, sdres, 0,
+ &sdres_tlv_length);
+ if (sdres_tlv == NULL)
+ return -ENOMEM;
+
+ size += LLCP_HEADER_SIZE;
+ size += dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE;
+ size += sdres_tlv_length;
+
+ skb = alloc_skb(size, GFP_KERNEL);
+ if (skb == NULL) {
+ kfree(sdres_tlv);
+ return -ENOMEM;
+ }
+
+ skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE);
+
+ skb = llcp_add_header(skb, LLCP_SAP_SDP, LLCP_SAP_SDP, LLCP_PDU_SNL);
+
+ memcpy(skb_put(skb, sdres_tlv_length), sdres_tlv, sdres_tlv_length);
+
+ skb_queue_tail(&local->tx_queue, skb);
+
+ kfree(sdres_tlv);
+
+ return 0;
+}
+
int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason)
{
struct sk_buff *skb;
return len;
}
+int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap,
+ struct msghdr *msg, size_t len)
+{
+ struct sk_buff *pdu;
+ struct nfc_llcp_local *local;
+ size_t frag_len = 0, remaining_len;
+ u8 *msg_ptr;
+ int err;
+
+ pr_debug("Send UI frame len %zd\n", len);
+
+ local = sock->local;
+ if (local == NULL)
+ return -ENODEV;
+
+ remaining_len = len;
+ msg_ptr = (u8 *) msg->msg_iov;
+
+ while (remaining_len > 0) {
+
+ frag_len = min_t(size_t, sock->miu, remaining_len);
+
+ pr_debug("Fragment %zd bytes remaining %zd",
+ frag_len, remaining_len);
+
+ pdu = nfc_alloc_send_skb(sock->dev, &sock->sk, MSG_DONTWAIT,
+ frag_len + LLCP_HEADER_SIZE, &err);
+ if (pdu == NULL) {
+ pr_err("Could not allocate PDU\n");
+ continue;
+ }
+
+ pdu = llcp_add_header(pdu, dsap, ssap, LLCP_PDU_UI);
+
+ memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len);
+
+ /* No need to check for the peer RW for UI frames */
+ skb_queue_tail(&local->tx_queue, pdu);
+
+ remaining_len -= frag_len;
+ msg_ptr += frag_len;
+ }
+
+ return len;
+}
+
int nfc_llcp_send_rr(struct nfc_llcp_sock *sock)
{
struct sk_buff *skb;