Return-Path: From: Andrzej Kaczmarek To: linux-bluetooth@vger.kernel.org Cc: Andrzej Kaczmarek Subject: [PATCH v3 04/22] monitor/avdtp: Decode AVDTP_GET_CAPABILITIES Date: Sun, 22 Nov 2015 21:20:16 +0100 Message-Id: <1448223634-23305-5-git-send-email-andrzej.kaczmarek@codecoup.pl> In-Reply-To: <1448223634-23305-1-git-send-email-andrzej.kaczmarek@codecoup.pl> References: <1448223634-23305-1-git-send-email-andrzej.kaczmarek@codecoup.pl> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: < ACL Data TX: Handle 256 flags 0x00 dlen 7 Channel: 258 len 3 [PSM 25 mode 0] {chan 2} AVDTP: Get Capabilities (0x02) Command (0x00) type 0x00 label 1 nosp 0 ACP SEID: 1 > ACL Data RX: Handle 256 flags 0x02 dlen 20 Channel: 66 len 16 [PSM 25 mode 0] {chan 2} AVDTP: Get Capabilities (0x02) Response Accept (0x02) type 0x00 label 1 nosp 0 Service Category: Media Transport (0x01) Service Category: Media Codec (0x07) 00 00 3f ff 02 35 ..?..5 Service Category: Content Protection (0x04) 02 00 .. --- monitor/avdtp.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) diff --git a/monitor/avdtp.c b/monitor/avdtp.c index 610bff5..065e79a 100644 --- a/monitor/avdtp.c +++ b/monitor/avdtp.c @@ -59,6 +59,16 @@ #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; uint8_t sig_id; @@ -171,6 +181,30 @@ 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; @@ -184,6 +218,32 @@ 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; + uint8_t service_cat; + uint8_t losc; + + while (l2cap_frame_get_u8(frame, &service_cat)) { + print_field("Service Category: %s (0x%02x)", + servicecat2str(service_cat), service_cat); + + if (!l2cap_frame_get_u8(frame, &losc)) + return false; + + 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; @@ -217,6 +277,29 @@ static bool avdtp_discover(struct avdtp_frame *avdtp_frame) return false; } +static bool avdtp_get_capabilities(struct avdtp_frame *avdtp_frame) +{ + struct l2cap_frame *frame = &avdtp_frame->l2cap_frame; + uint8_t type = avdtp_frame->hdr & 0x03; + uint8_t seid; + + switch (type) { + case AVDTP_MSG_TYPE_COMMAND: + if (!l2cap_frame_get_u8(frame, &seid)) + return false; + + print_field("ACP SEID: %d", seid >> 2); + + return true; + case AVDTP_MSG_TYPE_RESPONSE_ACCEPT: + return decode_capabilities(avdtp_frame); + case AVDTP_MSG_TYPE_RESPONSE_REJECT: + return avdtp_reject_common(avdtp_frame); + } + + return false; +} + static bool avdtp_signalling_packet(struct avdtp_frame *avdtp_frame) { struct l2cap_frame *frame = &avdtp_frame->l2cap_frame; @@ -274,6 +357,8 @@ static bool avdtp_signalling_packet(struct avdtp_frame *avdtp_frame) switch (sig_id) { case AVDTP_DISCOVER: return avdtp_discover(avdtp_frame); + case AVDTP_GET_CAPABILITIES: + return avdtp_get_capabilities(avdtp_frame); } packet_hexdump(frame->data, frame->size); -- 2.6.2