From 94f418a206648c9be6fd84d6681d6956b8f8b106 Mon Sep 17 00:00:00 2001 From: Samuel Ortiz Date: Tue, 16 Oct 2012 15:01:40 +0200 Subject: NFC: UI frame sending routine implementation UI frames still need to follow the MIU rule, and they need to use the client passed dsap as the listening socket dsap is stuck on SDP. Signed-off-by: Samuel Ortiz --- net/nfc/llcp/commands.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++ net/nfc/llcp/llcp.h | 2 ++ 2 files changed, 48 insertions(+) (limited to 'net/nfc') diff --git a/net/nfc/llcp/commands.c b/net/nfc/llcp/commands.c index 6db280d..7941535 100644 --- a/net/nfc/llcp/commands.c +++ b/net/nfc/llcp/commands.c @@ -579,6 +579,52 @@ int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock, 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; diff --git a/net/nfc/llcp/llcp.h b/net/nfc/llcp/llcp.h index e06d035..276da3a 100644 --- a/net/nfc/llcp/llcp.h +++ b/net/nfc/llcp/llcp.h @@ -221,6 +221,8 @@ int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason); int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock); int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock, struct msghdr *msg, size_t len); +int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap, + struct msghdr *msg, size_t len); int nfc_llcp_send_rr(struct nfc_llcp_sock *sock); /* Socket API */ -- cgit v1.1