Return-Path: From: Andrzej Kaczmarek To: linux-bluetooth@vger.kernel.org Cc: Andrzej Kaczmarek Subject: [PATCH 04/22] monitor/avdtp: Decode AVDTP_GET_CAPABILITIES Date: Sat, 14 Nov 2015 14:44:21 +0100 Message-Id: <1447508679-21798-5-git-send-email-andrzej.kaczmarek@codecoup.pl> In-Reply-To: <1447508679-21798-1-git-send-email-andrzej.kaczmarek@codecoup.pl> References: <1447508679-21798-1-git-send-email-andrzej.kaczmarek@codecoup.pl> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: --- monitor/avdtp.c | 92 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 92 insertions(+) diff --git a/monitor/avdtp.c b/monitor/avdtp.c index f851107..cae704a 100644 --- a/monitor/avdtp.c +++ b/monitor/avdtp.c @@ -53,6 +53,16 @@ #define AVDTP_GET_ALL_CAPABILITIES 0x0c #define AVDTP_DELAYREPORT 0x0d +/* Service Categories */ +#define AVDTP_MEDIA_TRANSPORT 0x01 +#define AVDTP_REPORTING 0x02 +#define AVDTP_RECOVERY 0x03 +#define AVDTP_CONTENT_PROTECTION 0x04 +#define AVDTP_HEADER_COMPRESSION 0x05 +#define AVDTP_MULTIPLEXING 0x06 +#define AVDTP_MEDIA_CODEC 0x07 +#define AVDTP_DELAY_REPORTING 0x08 + struct avdtp_frame { uint8_t hdr; struct l2cap_frame l2cap_frame; @@ -164,6 +174,30 @@ static const char *mediatype2str(uint8_t media_type) } } +static const char *servicecat2str(uint8_t service_cat) +{ + switch (service_cat) { + case AVDTP_MEDIA_TRANSPORT: + return "Media Transport"; + case AVDTP_REPORTING: + return "Reporting"; + case AVDTP_RECOVERY: + return "Recovery"; + case AVDTP_CONTENT_PROTECTION: + return "Content Protection"; + case AVDTP_HEADER_COMPRESSION: + return "Header Compression"; + case AVDTP_MULTIPLEXING: + return "Multiplexing"; + case AVDTP_MEDIA_CODEC: + return "Media Codec"; + case AVDTP_DELAY_REPORTING: + return "Delay Reporting"; + default: + return "Reserved"; + } +} + static bool avdtp_reject_common(struct avdtp_frame *avdtp_frame) { struct l2cap_frame *frame = &avdtp_frame->l2cap_frame; @@ -177,6 +211,36 @@ static bool avdtp_reject_common(struct avdtp_frame *avdtp_frame) return true; } +static bool decode_capabilities(struct avdtp_frame *avdtp_frame) +{ + struct l2cap_frame *frame = &avdtp_frame->l2cap_frame; + + for (;;) { + uint8_t service_cat; + uint8_t losc; + + if (!l2cap_frame_get_u8(frame, &service_cat)) + break; + + if (!l2cap_frame_get_u8(frame, &losc)) + return false; + + print_field("Service Category: %s", + servicecat2str(service_cat)); + + if (frame->size < losc) + return false; + + /* TODO: decode service capabilities */ + + packet_hexdump(frame->data, losc); + + l2cap_frame_pull(frame, frame, losc); + } + + return true; +} + static bool avdtp_discover(struct avdtp_frame *avdtp_frame) { struct l2cap_frame *frame = &avdtp_frame->l2cap_frame; @@ -216,6 +280,31 @@ response: return true; } +static bool avdtp_get_capabilities(struct avdtp_frame *avdtp_frame) +{ + struct l2cap_frame *frame = &avdtp_frame->l2cap_frame; + uint8_t seid; + + if (avdtp_frame->hdr & 0x01) + goto reject; + + if (avdtp_frame->hdr & 0x02) + goto response; + + if (!l2cap_frame_get_u8(frame, &seid)) + return false; + + print_field("ACP SEID: %d", seid >> 2); + + return true; + +reject: + return avdtp_reject_common(avdtp_frame); + +response: + return decode_capabilities(avdtp_frame); +} + static bool avdtp_signalling_packet(struct avdtp_frame *avdtp_frame) { struct l2cap_frame *frame = &avdtp_frame->l2cap_frame; @@ -273,6 +362,9 @@ static bool avdtp_signalling_packet(struct avdtp_frame *avdtp_frame) case AVDTP_DISCOVER: ret = avdtp_discover(avdtp_frame); break; + case AVDTP_GET_CAPABILITIES: + ret = avdtp_get_capabilities(avdtp_frame); + break; default: packet_hexdump(frame->data, frame->size); ret = true; -- 2.6.2