Return-Path: From: Gowtham Anandha Babu To: linux-bluetooth@vger.kernel.org Cc: d.kasatkin@samsung.com, bharat.panda@samsung.com, cpgs@samsung.com, Gowtham Anandha Babu Subject: [PATCH v1 4/5] monitor/rfcomm: Add support for PN frame decoding Date: Wed, 03 Dec 2014 17:31:20 +0530 Message-id: <1417608081-27926-5-git-send-email-gowtham.ab@samsung.com> In-reply-to: <1417608081-27926-1-git-send-email-gowtham.ab@samsung.com> References: <1417608081-27926-1-git-send-email-gowtham.ab@samsung.com> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: Changes made to decode PN frame in RFCOMM for btmon. RFCOMM: Unnumbered Info with Header Check (UIH)(0xef) Address: 0x01 cr 0 dlci 0x00 Control: 0xef poll/final 0 Length: 10 FCS: 0xaa MCC Message type: DLC Parameter Negotiation RSP(0x20) Length: 8 dlci 32 frame_type 0 credit_flow 14 pri 39 ack_timer 0 frame_size 666 max_retrans 0 credits 7 --- monitor/rfcomm.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/monitor/rfcomm.c b/monitor/rfcomm.c index 848bad7..2a82001 100644 --- a/monitor/rfcomm.c +++ b/monitor/rfcomm.c @@ -78,6 +78,12 @@ static char *cr_str[] = { /* RLS macro */ #define GET_ERROR(err) (err & 0x0f) +/* PN macros */ +#define GET_FRM_TYPE(ctrl) ((ctrl & 0x0f)) +#define GET_CRT_FLOW(ctrl) ((ctrl & 0xf0) >> 4) +#define GET_PRIORITY(prio) ((prio & 0x3f)) +#define GET_PN_DLCI(dlci) ((dlci & 0x3f)) + struct rfcomm_lhdr { uint8_t address; uint8_t control; @@ -234,6 +240,45 @@ static inline bool mcc_rls(struct rfcomm_frame *rfcomm_frame, uint8_t indent) return true; } +static inline bool mcc_pn(struct rfcomm_frame *rfcomm_frame, uint8_t indent) +{ + struct l2cap_frame *frame = &rfcomm_frame->l2cap_frame; + struct rfcomm_pn pn; + + /* rfcomm_pn struct is defined in rfcomm.h */ + + if (!l2cap_frame_get_u8(frame, &pn.dlci)) + return false; + + if (!l2cap_frame_get_u8(frame, &pn.flow_ctrl)) + return false; + + if (!l2cap_frame_get_u8(frame, &pn.priority)) + return false; + + print_field("%*cdlci %d frame_type %d credit_flow %d pri %d", indent, + ' ', GET_PN_DLCI(pn.dlci), GET_FRM_TYPE(pn.flow_ctrl), + GET_CRT_FLOW(pn.flow_ctrl), GET_PRIORITY(pn.priority)); + + if (!l2cap_frame_get_u8(frame, &pn.ack_timer)) + return false; + + if (!l2cap_frame_get_be16(frame, &pn.mtu)) + return false; + + if (!l2cap_frame_get_u8(frame, &pn.max_retrans)) + return false; + + if (!l2cap_frame_get_u8(frame, &pn.credits)) + return false; + + print_field("%*cack_timer %d frame_size %d max_retrans %d credits %d", + indent, ' ', pn.ack_timer, __bswap_16(pn.mtu), + pn.max_retrans, pn.credits); + + return true; +} + struct mcc_data { uint8_t type; const char *str; @@ -301,6 +346,8 @@ static inline bool mcc_frame(struct rfcomm_frame *rfcomm_frame, uint8_t indent) return mcc_rpn(rfcomm_frame, indent+2); case RFCOMM_RLS: return mcc_rls(rfcomm_frame, indent+2); + case RFCOMM_PN: + return mcc_pn(rfcomm_frame, indent+2); default: packet_hexdump(frame->data, frame->size); } -- 1.9.1