diff options
| author | Samuel Ortiz <sameo@linux.intel.com> | 2012-03-05 04:03:43 +0400 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-03-07 00:16:22 +0400 |
| commit | eda21f16a5ed2476c1740e83a7dfaae34d893d9b (patch) | |
| tree | 7bbb9d2843d0d2cfb5640faa971bafbcfa92a560 /net/nfc | |
| parent | d094afa155273e03b82981ea818d39c7a2dfba86 (diff) | |
| download | linux-eda21f16a5ed2476c1740e83a7dfaae34d893d9b.tar.xz | |
NFC: Set MIU and RW values from CONNECT and CC LLCP frames
We use the maximum values for the LLCP Maximum Information Unit and Receive
Window Size.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/nfc')
| -rw-r--r-- | net/nfc/llcp/commands.c | 48 | ||||
| -rw-r--r-- | net/nfc/llcp/llcp.h | 4 |
2 files changed, 49 insertions, 3 deletions
diff --git a/net/nfc/llcp/commands.c b/net/nfc/llcp/commands.c index 8ebd322b11eb..a02292ba25c7 100644 --- a/net/nfc/llcp/commands.c +++ b/net/nfc/llcp/commands.c @@ -284,6 +284,9 @@ int nfc_llcp_send_connect(struct nfc_llcp_sock *sock) struct nfc_llcp_local *local; struct sk_buff *skb; u8 *service_name_tlv = NULL, service_name_tlv_length; + u8 *miux_tlv = NULL, miux_tlv_length; + u8 *rw_tlv = NULL, rw_tlv_length, rw; + __be16 miux; int err; u16 size = 0; @@ -301,6 +304,14 @@ int nfc_llcp_send_connect(struct nfc_llcp_sock *sock) size += service_name_tlv_length; } + miux = cpu_to_be16(LLCP_MAX_MIUX); + miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0, &miux_tlv_length); + size += miux_tlv_length; + + rw = LLCP_MAX_RW; + rw_tlv = nfc_llcp_build_tlv(LLCP_TLV_RW, &rw, 0, &rw_tlv_length); + size += rw_tlv_length; + pr_debug("SKB size %d SN length %zu\n", size, sock->service_name_len); skb = llcp_allocate_pdu(sock, LLCP_PDU_CONNECT, size); @@ -313,6 +324,9 @@ int nfc_llcp_send_connect(struct nfc_llcp_sock *sock) skb = llcp_add_tlv(skb, service_name_tlv, service_name_tlv_length); + skb = llcp_add_tlv(skb, miux_tlv, miux_tlv_length); + skb = llcp_add_tlv(skb, rw_tlv, rw_tlv_length); + skb_queue_tail(&local->tx_queue, skb); return 0; @@ -321,6 +335,8 @@ error_tlv: pr_err("error %d\n", err); kfree(service_name_tlv); + kfree(miux_tlv); + kfree(rw_tlv); return err; } @@ -329,6 +345,11 @@ int nfc_llcp_send_cc(struct nfc_llcp_sock *sock) { struct nfc_llcp_local *local; struct sk_buff *skb; + u8 *miux_tlv = NULL, miux_tlv_length; + u8 *rw_tlv = NULL, rw_tlv_length, rw; + __be16 miux; + int err; + u16 size = 0; pr_debug("Sending CC\n"); @@ -336,13 +357,34 @@ int nfc_llcp_send_cc(struct nfc_llcp_sock *sock) if (local == NULL) return -ENODEV; - skb = llcp_allocate_pdu(sock, LLCP_PDU_CC, 0); - if (skb == NULL) - return -ENOMEM; + miux = cpu_to_be16(LLCP_MAX_MIUX); + miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0, &miux_tlv_length); + size += miux_tlv_length; + + rw = LLCP_MAX_RW; + rw_tlv = nfc_llcp_build_tlv(LLCP_TLV_RW, &rw, 0, &rw_tlv_length); + size += rw_tlv_length; + + skb = llcp_allocate_pdu(sock, LLCP_PDU_CC, size); + if (skb == NULL) { + err = -ENOMEM; + goto error_tlv; + } + + skb = llcp_add_tlv(skb, miux_tlv, miux_tlv_length); + skb = llcp_add_tlv(skb, rw_tlv, rw_tlv_length); skb_queue_tail(&local->tx_queue, skb); return 0; + +error_tlv: + pr_err("error %d\n", err); + + kfree(miux_tlv); + kfree(rw_tlv); + + return err; } int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason) diff --git a/net/nfc/llcp/llcp.h b/net/nfc/llcp/llcp.h index 054c64ffdaa7..70e1762d6e8d 100644 --- a/net/nfc/llcp/llcp.h +++ b/net/nfc/llcp/llcp.h @@ -28,6 +28,10 @@ enum llcp_state { #define LLCP_DEFAULT_RW 1 #define LLCP_DEFAULT_MIU 128 +#define LLCP_MAX_LTO 0xff +#define LLCP_MAX_RW 15 +#define LLCP_MAX_MIUX 0x7ff + #define LLCP_WKS_NUM_SAP 16 #define LLCP_SDP_NUM_SAP 16 #define LLCP_LOCAL_NUM_SAP 32 |