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 2/5] monitor/rfcomm: Add support for RPN frame decoding Date: Tue, 02 Dec 2014 15:07:34 +0530 Message-id: <1417513057-16037-3-git-send-email-gowtham.ab@samsung.com> In-reply-to: <1417513057-16037-1-git-send-email-gowtham.ab@samsung.com> References: <1417513057-16037-1-git-send-email-gowtham.ab@samsung.com> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: Changes made to decode RPN frame in RFCOMM for btmon. RFCOMM: Unnumbered Info with Header Check (UIH)(0xef) Address: 0x03 cr 1 dlci 0x00 Control: 0xef poll/final 0 Length: 10 FCS: 0x70 MCC Message type: Remote Port Negotiation Command CMD(0x24) Length: 8 dlci 32 br 3 db 2 sb 0 p 0 pt 0 xi 0 xo 0 rtri 0 rtro 0 rtci 0 rtco 0 xon 17 xoff 19 pm 0x3f7f --- monitor/rfcomm.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) diff --git a/monitor/rfcomm.c b/monitor/rfcomm.c index 969b29f..5e5545c 100644 --- a/monitor/rfcomm.c +++ b/monitor/rfcomm.c @@ -68,6 +68,18 @@ static char *cr_str[] = { #define GET_BRK_SIG3(sigs) ((sigs & 0x08) >> 3) #define GET_BRK_SIG_LEN(sigs) ((sigs & 0xf0) >> 4) +/* RPN macros */ +#define GET_RPN_DB(parity) (parity & 0x03) +#define GET_RPN_SB(parity) ((parity & 0x04) >> 2) +#define GET_RPN_PARITY(parity) ((parity & 0x08) >> 3) +#define GET_RPN_PTYPE(parity) ((parity & 0x03) >> 3) +#define GET_RPN_XIN(io) (io & 0x01) +#define GET_RPN_XOUT(io) ((io & 0x02) >> 1) +#define GET_RPN_RTRI(io) ((io & 0x04) >> 2) +#define GET_RPN_RTRO(io) ((io & 0x08) >> 3) +#define GET_RPN_RTCI(io) ((io & 0x10) >> 4) +#define GET_RPN_RTCO(io) ((io & 0x20) >> 5) + struct rfcomm_lhdr { uint8_t address; uint8_t control; @@ -82,6 +94,16 @@ struct rfcomm_lmsc { uint8_t break_sig; } __attribute__((packed)); +struct rfcomm_rpn { + uint8_t dlci; + uint8_t bit_rate; + uint8_t parity; + uint8_t io; + uint8_t xon; + uint8_t xoff; + uint16_t pm; +} __attribute__ ((packed)); + struct rfcomm_lmcc { uint8_t type; uint16_t length; @@ -148,6 +170,55 @@ done: return true; } +static inline bool mcc_rpn(struct rfcomm_frame *rfcomm_frame, uint8_t indent) +{ + struct l2cap_frame *frame = &rfcomm_frame->l2cap_frame; + struct rfcomm_rpn rpn; + + if (!l2cap_frame_get_u8(frame, &rpn.dlci)) + return false; + + print_field("%*cdlci %d", indent, ' ', RFCOMM_GET_DLCI(rpn.dlci)); + + if (frame->size < 7) + goto done; + + /* port value octets (optional) */ + + if (!l2cap_frame_get_u8(frame, &rpn.bit_rate)) + return false; + + if (!l2cap_frame_get_u8(frame, &rpn.parity)) + return false; + + if (!l2cap_frame_get_u8(frame, &rpn.io)) + return false; + + print_field("%*cbr %d db %d sb %d p %d pt %d xi %d xo %d", indent, ' ', + rpn.bit_rate, GET_RPN_DB(rpn.parity), GET_RPN_SB(rpn.parity), + GET_RPN_PARITY(rpn.parity), GET_RPN_PTYPE(rpn.parity), + GET_RPN_XIN(rpn.io), GET_RPN_XOUT(rpn.io)); + + if (!l2cap_frame_get_u8(frame, &rpn.xon)) + return false; + + if (!l2cap_frame_get_u8(frame, &rpn.xoff)) + return false; + + print_field("%*crtri %d rtro %d rtci %d rtco %d xon %d xoff %d", + indent, ' ', GET_RPN_RTRI(rpn.io), GET_RPN_RTRO(rpn.io), + GET_RPN_RTCI(rpn.io), GET_RPN_RTCO(rpn.io), rpn.xon, + rpn.xoff); + + if (!l2cap_frame_get_be16(frame, &rpn.pm)) + return false; + + print_field("%*cpm 0x%04x", indent, ' ', __bswap_16(rpn.pm)); + +done: + return true; +} + struct mcc_data { uint8_t type; const char *str; @@ -211,6 +282,8 @@ static inline bool mcc_frame(struct rfcomm_frame *rfcomm_frame, uint8_t indent) switch (type) { case RFCOMM_MSC: return mcc_msc(rfcomm_frame, indent+2); + case RFCOMM_RPN: + return mcc_rpn(rfcomm_frame, indent+2); default: packet_hexdump(frame->data, frame->size); } -- 1.9.1