| /* |
| * |
| * BlueZ - Bluetooth protocol stack for Linux |
| * |
| * Copyright (C) 2006-2010 Nokia Corporation |
| * Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org> |
| * |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| * |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <stdint.h> |
| #include <stdbool.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include <assert.h> |
| #include <string.h> |
| #include <sys/socket.h> |
| #include <netinet/in.h> |
| |
| #include <glib.h> |
| |
| #include "lib/bluetooth.h" |
| #include "src/log.h" |
| #include "src/shared/util.h" |
| #include "src/shared/queue.h" |
| #include "avdtp.h" |
| #include "../profiles/audio/a2dp-codecs.h" |
| |
| #define MAX_SEID 0x3E |
| static unsigned int seids; |
| |
| #ifndef MAX |
| # define MAX(x, y) ((x) > (y) ? (x) : (y)) |
| #endif |
| |
| #define AVDTP_DISCOVER 0x01 |
| #define AVDTP_GET_CAPABILITIES 0x02 |
| #define AVDTP_SET_CONFIGURATION 0x03 |
| #define AVDTP_GET_CONFIGURATION 0x04 |
| #define AVDTP_RECONFIGURE 0x05 |
| #define AVDTP_OPEN 0x06 |
| #define AVDTP_START 0x07 |
| #define AVDTP_CLOSE 0x08 |
| #define AVDTP_SUSPEND 0x09 |
| #define AVDTP_ABORT 0x0A |
| #define AVDTP_SECURITY_CONTROL 0x0B |
| #define AVDTP_GET_ALL_CAPABILITIES 0x0C |
| #define AVDTP_DELAY_REPORT 0x0D |
| |
| #define AVDTP_PKT_TYPE_SINGLE 0x00 |
| #define AVDTP_PKT_TYPE_START 0x01 |
| #define AVDTP_PKT_TYPE_CONTINUE 0x02 |
| #define AVDTP_PKT_TYPE_END 0x03 |
| |
| #define AVDTP_MSG_TYPE_COMMAND 0x00 |
| #define AVDTP_MSG_TYPE_GEN_REJECT 0x01 |
| #define AVDTP_MSG_TYPE_ACCEPT 0x02 |
| #define AVDTP_MSG_TYPE_REJECT 0x03 |
| |
| #define REQ_TIMEOUT 6 |
| #define ABORT_TIMEOUT 2 |
| #define DISCONNECT_TIMEOUT 1 |
| #define START_TIMEOUT 1 |
| |
| #if __BYTE_ORDER == __LITTLE_ENDIAN |
| |
| struct avdtp_common_header { |
| uint8_t message_type:2; |
| uint8_t packet_type:2; |
| uint8_t transaction:4; |
| } __attribute__ ((packed)); |
| |
| struct avdtp_single_header { |
| uint8_t message_type:2; |
| uint8_t packet_type:2; |
| uint8_t transaction:4; |
| uint8_t signal_id:6; |
| uint8_t rfa0:2; |
| } __attribute__ ((packed)); |
| |
| struct avdtp_start_header { |
| uint8_t message_type:2; |
| uint8_t packet_type:2; |
| uint8_t transaction:4; |
| uint8_t no_of_packets; |
| uint8_t signal_id:6; |
| uint8_t rfa0:2; |
| } __attribute__ ((packed)); |
| |
| struct avdtp_continue_header { |
| uint8_t message_type:2; |
| uint8_t packet_type:2; |
| uint8_t transaction:4; |
| } __attribute__ ((packed)); |
| |
| struct seid_info { |
| uint8_t rfa0:1; |
| uint8_t inuse:1; |
| uint8_t seid:6; |
| uint8_t rfa2:3; |
| uint8_t type:1; |
| uint8_t media_type:4; |
| } __attribute__ ((packed)); |
| |
| struct seid { |
| uint8_t rfa0:2; |
| uint8_t seid:6; |
| } __attribute__ ((packed)); |
| |
| #elif __BYTE_ORDER == __BIG_ENDIAN |
| |
| struct avdtp_common_header { |
| uint8_t transaction:4; |
| uint8_t packet_type:2; |
| uint8_t message_type:2; |
| } __attribute__ ((packed)); |
| |
| struct avdtp_single_header { |
| uint8_t transaction:4; |
| uint8_t packet_type:2; |
| uint8_t message_type:2; |
| uint8_t rfa0:2; |
| uint8_t signal_id:6; |
| } __attribute__ ((packed)); |
| |
| struct avdtp_start_header { |
| uint8_t transaction:4; |
| uint8_t packet_type:2; |
| uint8_t message_type:2; |
| uint8_t no_of_packets; |
| uint8_t rfa0:2; |
| uint8_t signal_id:6; |
| } __attribute__ ((packed)); |
| |
| struct avdtp_continue_header { |
| uint8_t transaction:4; |
| uint8_t packet_type:2; |
| uint8_t message_type:2; |
| } __attribute__ ((packed)); |
| |
| struct seid_info { |
| uint8_t seid:6; |
| uint8_t inuse:1; |
| uint8_t rfa0:1; |
| uint8_t media_type:4; |
| uint8_t type:1; |
| uint8_t rfa2:3; |
| } __attribute__ ((packed)); |
| |
| struct seid { |
| uint8_t seid:6; |
| uint8_t rfa0:2; |
| } __attribute__ ((packed)); |
| |
| #else |
| #error "Unknown byte order" |
| #endif |
| |
| /* packets */ |
| |
| struct discover_resp { |
| struct seid_info seps[0]; |
| } __attribute__ ((packed)); |
| |
| struct getcap_resp { |
| uint8_t caps[0]; |
| } __attribute__ ((packed)); |
| |
| struct start_req { |
| struct seid first_seid; |
| struct seid other_seids[0]; |
| } __attribute__ ((packed)); |
| |
| struct suspend_req { |
| struct seid first_seid; |
| struct seid other_seids[0]; |
| } __attribute__ ((packed)); |
| |
| struct seid_rej { |
| uint8_t error; |
| } __attribute__ ((packed)); |
| |
| struct conf_rej { |
| uint8_t category; |
| uint8_t error; |
| } __attribute__ ((packed)); |
| |
| #if __BYTE_ORDER == __LITTLE_ENDIAN |
| |
| struct seid_req { |
| uint8_t rfa0:2; |
| uint8_t acp_seid:6; |
| } __attribute__ ((packed)); |
| |
| struct setconf_req { |
| uint8_t rfa0:2; |
| uint8_t acp_seid:6; |
| uint8_t rfa1:2; |
| uint8_t int_seid:6; |
| |
| uint8_t caps[0]; |
| } __attribute__ ((packed)); |
| |
| struct stream_rej { |
| uint8_t rfa0:2; |
| uint8_t acp_seid:6; |
| uint8_t error; |
| } __attribute__ ((packed)); |
| |
| struct reconf_req { |
| uint8_t rfa0:2; |
| uint8_t acp_seid:6; |
| |
| uint8_t serv_cap; |
| uint8_t serv_cap_len; |
| |
| uint8_t caps[0]; |
| } __attribute__ ((packed)); |
| |
| struct delay_req { |
| uint8_t rfa0:2; |
| uint8_t acp_seid:6; |
| uint16_t delay; |
| } __attribute__ ((packed)); |
| |
| #elif __BYTE_ORDER == __BIG_ENDIAN |
| |
| struct seid_req { |
| uint8_t acp_seid:6; |
| uint8_t rfa0:2; |
| } __attribute__ ((packed)); |
| |
| struct setconf_req { |
| uint8_t acp_seid:6; |
| uint8_t rfa0:2; |
| uint8_t int_seid:6; |
| uint8_t rfa1:2; |
| |
| uint8_t caps[0]; |
| } __attribute__ ((packed)); |
| |
| struct stream_rej { |
| uint8_t acp_seid:6; |
| uint8_t rfa0:2; |
| uint8_t error; |
| } __attribute__ ((packed)); |
| |
| struct reconf_req { |
| uint8_t acp_seid:6; |
| uint8_t rfa0:2; |
| |
| uint8_t serv_cap; |
| uint8_t serv_cap_len; |
| |
| uint8_t caps[0]; |
| } __attribute__ ((packed)); |
| |
| struct delay_req { |
| uint8_t acp_seid:6; |
| uint8_t rfa0:2; |
| uint16_t delay; |
| } __attribute__ ((packed)); |
| |
| #else |
| #error "Unknown byte order" |
| #endif |
| |
| struct in_buf { |
| gboolean active; |
| int no_of_packets; |
| uint8_t transaction; |
| uint8_t message_type; |
| uint8_t signal_id; |
| uint8_t buf[1024]; |
| uint8_t data_size; |
| }; |
| |
| struct pending_req { |
| uint8_t transaction; |
| uint8_t signal_id; |
| void *data; |
| size_t data_size; |
| struct avdtp_stream *stream; /* Set if the request targeted a stream */ |
| guint timeout; |
| gboolean collided; |
| }; |
| |
| struct avdtp_remote_sep { |
| uint8_t seid; |
| uint8_t type; |
| uint8_t media_type; |
| struct avdtp_service_capability *codec; |
| gboolean delay_reporting; |
| GSList *caps; /* of type struct avdtp_service_capability */ |
| struct avdtp_stream *stream; |
| }; |
| |
| struct avdtp_local_sep { |
| avdtp_state_t state; |
| struct avdtp_stream *stream; |
| struct seid_info info; |
| uint8_t codec; |
| uint32_t vndcodec_vendor; |
| uint16_t vndcodec_codec; |
| gboolean delay_reporting; |
| GSList *caps; |
| struct avdtp_sep_ind *ind; |
| struct avdtp_sep_cfm *cfm; |
| void *user_data; |
| }; |
| |
| struct stream_callback { |
| avdtp_stream_state_cb cb; |
| void *user_data; |
| unsigned int id; |
| }; |
| |
| struct discover_callback { |
| unsigned int id; |
| avdtp_discover_cb_t cb; |
| void *user_data; |
| }; |
| |
| struct disconnect_callback { |
| unsigned int id; |
| avdtp_disconnect_cb_t cb; |
| void *user_data; |
| }; |
| |
| struct avdtp_stream { |
| GIOChannel *io; |
| uint16_t imtu; |
| uint16_t omtu; |
| struct avdtp *session; |
| struct avdtp_local_sep *lsep; |
| uint8_t rseid; |
| GSList *caps; |
| GSList *callbacks; |
| struct avdtp_service_capability *codec; |
| guint io_id; /* Transport GSource ID */ |
| guint timer; /* Waiting for other side to close or open |
| * the transport channel */ |
| gboolean open_acp; /* If we are in ACT role for Open */ |
| gboolean close_int; /* If we are in INT role for Close */ |
| gboolean abort_int; /* If we are in INT role for Abort */ |
| guint start_timer; /* Wait START command timer */ |
| gboolean delay_reporting; |
| uint16_t delay; /* AVDTP 1.3 Delay Reporting feature */ |
| gboolean starting; /* only valid while sep state == OPEN */ |
| }; |
| |
| /* Structure describing an AVDTP connection between two devices */ |
| |
| struct avdtp { |
| unsigned int ref; |
| |
| uint16_t version; |
| |
| guint auth_id; |
| |
| GIOChannel *io; |
| guint io_id; |
| |
| GSList *seps; /* Elements of type struct avdtp_remote_sep * */ |
| struct queue *lseps; /* Elements of type struct avdtp_local_sep * */ |
| |
| GSList *streams; /* Elements of type struct avdtp_stream * */ |
| |
| GSList *req_queue; /* Elements of type struct pending_req * */ |
| GSList *prio_queue; /* Same as req_queue but is processed before it */ |
| |
| struct avdtp_stream *pending_open; |
| |
| uint16_t imtu; |
| uint16_t omtu; |
| |
| struct in_buf in; |
| |
| char *buf; |
| |
| struct discover_callback *discover; |
| struct pending_req *req; |
| |
| GSList *disconnect; |
| |
| bool shutdown; |
| }; |
| |
| static int send_request(struct avdtp *session, gboolean priority, |
| struct avdtp_stream *stream, uint8_t signal_id, |
| void *buffer, size_t size); |
| static gboolean avdtp_parse_resp(struct avdtp *session, |
| struct avdtp_stream *stream, |
| uint8_t transaction, uint8_t signal_id, |
| void *buf, int size); |
| static gboolean avdtp_parse_rej(struct avdtp *session, |
| struct avdtp_stream *stream, |
| uint8_t transaction, uint8_t signal_id, |
| void *buf, int size); |
| static int process_queue(struct avdtp *session); |
| static void avdtp_sep_set_state(struct avdtp *session, |
| struct avdtp_local_sep *sep, |
| avdtp_state_t state); |
| |
| static const char *avdtp_statestr(avdtp_state_t state) |
| { |
| switch (state) { |
| case AVDTP_STATE_IDLE: |
| return "IDLE"; |
| case AVDTP_STATE_CONFIGURED: |
| return "CONFIGURED"; |
| case AVDTP_STATE_OPEN: |
| return "OPEN"; |
| case AVDTP_STATE_STREAMING: |
| return "STREAMING"; |
| case AVDTP_STATE_CLOSING: |
| return "CLOSING"; |
| case AVDTP_STATE_ABORTING: |
| return "ABORTING"; |
| default: |
| return "<unknown state>"; |
| } |
| } |
| |
| static gboolean try_send(int sk, void *data, size_t len) |
| { |
| int err; |
| |
| do { |
| err = send(sk, data, len, 0); |
| } while (err < 0 && errno == EINTR); |
| |
| if (err < 0) { |
| error("send: %s (%d)", strerror(errno), errno); |
| return FALSE; |
| } else if ((size_t) err != len) { |
| error("try_send: complete buffer not sent (%d/%zu bytes)", |
| err, len); |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| static gboolean avdtp_send(struct avdtp *session, uint8_t transaction, |
| uint8_t message_type, uint8_t signal_id, |
| void *data, size_t len) |
| { |
| unsigned int cont_fragments, sent; |
| struct avdtp_start_header start; |
| struct avdtp_continue_header cont; |
| int sock; |
| |
| if (session->io == NULL) { |
| error("avdtp_send: session is closed"); |
| return FALSE; |
| } |
| |
| sock = g_io_channel_unix_get_fd(session->io); |
| |
| /* Single packet - no fragmentation */ |
| if (sizeof(struct avdtp_single_header) + len <= session->omtu) { |
| struct avdtp_single_header single; |
| |
| memset(&single, 0, sizeof(single)); |
| |
| single.transaction = transaction; |
| single.packet_type = AVDTP_PKT_TYPE_SINGLE; |
| single.message_type = message_type; |
| single.signal_id = signal_id; |
| |
| memcpy(session->buf, &single, sizeof(single)); |
| memcpy(session->buf + sizeof(single), data, len); |
| |
| return try_send(sock, session->buf, sizeof(single) + len); |
| } |
| |
| /* Check if there is enough space to start packet */ |
| if (session->omtu < sizeof(start)) { |
| error("No enough space to fragment packet"); |
| return FALSE; |
| } |
| |
| /* Count the number of needed fragments */ |
| cont_fragments = (len - (session->omtu - sizeof(start))) / |
| (session->omtu - sizeof(cont)) + 1; |
| |
| DBG("%zu bytes split into %d fragments", len, cont_fragments + 1); |
| |
| /* Send the start packet */ |
| memset(&start, 0, sizeof(start)); |
| start.transaction = transaction; |
| start.packet_type = AVDTP_PKT_TYPE_START; |
| start.message_type = message_type; |
| start.no_of_packets = cont_fragments + 1; |
| start.signal_id = signal_id; |
| |
| memcpy(session->buf, &start, sizeof(start)); |
| memcpy(session->buf + sizeof(start), data, |
| session->omtu - sizeof(start)); |
| |
| if (!try_send(sock, session->buf, session->omtu)) |
| return FALSE; |
| |
| DBG("first packet with %zu bytes sent", session->omtu - sizeof(start)); |
| |
| sent = session->omtu - sizeof(start); |
| |
| /* Send the continue fragments and the end packet */ |
| while (sent < len) { |
| int left, to_copy; |
| |
| left = len - sent; |
| if (left + sizeof(cont) > session->omtu) { |
| cont.packet_type = AVDTP_PKT_TYPE_CONTINUE; |
| to_copy = session->omtu - sizeof(cont); |
| DBG("sending continue with %d bytes", to_copy); |
| } else { |
| cont.packet_type = AVDTP_PKT_TYPE_END; |
| to_copy = left; |
| DBG("sending end with %d bytes", to_copy); |
| } |
| |
| cont.transaction = transaction; |
| cont.message_type = message_type; |
| |
| memcpy(session->buf, &cont, sizeof(cont)); |
| memcpy(session->buf + sizeof(cont), data + sent, to_copy); |
| |
| if (!try_send(sock, session->buf, to_copy + sizeof(cont))) |
| return FALSE; |
| |
| sent += to_copy; |
| } |
| |
| return TRUE; |
| } |
| |
| static void pending_req_free(void *data) |
| { |
| struct pending_req *req = data; |
| |
| if (req->timeout) |
| g_source_remove(req->timeout); |
| g_free(req->data); |
| g_free(req); |
| } |
| |
| static void close_stream(struct avdtp_stream *stream) |
| { |
| int sock; |
| |
| if (stream->io == NULL) |
| return; |
| |
| sock = g_io_channel_unix_get_fd(stream->io); |
| |
| shutdown(sock, SHUT_RDWR); |
| |
| g_io_channel_shutdown(stream->io, FALSE, NULL); |
| |
| g_io_channel_unref(stream->io); |
| stream->io = NULL; |
| } |
| |
| static gboolean stream_close_timeout(gpointer user_data) |
| { |
| struct avdtp_stream *stream = user_data; |
| |
| DBG("Timed out waiting for peer to close the transport channel"); |
| |
| stream->timer = 0; |
| |
| close_stream(stream); |
| |
| return FALSE; |
| } |
| |
| static gboolean stream_open_timeout(gpointer user_data) |
| { |
| struct avdtp_stream *stream = user_data; |
| |
| DBG("Timed out waiting for peer to open the transport channel"); |
| |
| stream->timer = 0; |
| |
| stream->session->pending_open = NULL; |
| |
| avdtp_abort(stream->session, stream); |
| |
| return FALSE; |
| } |
| |
| void avdtp_error_init(struct avdtp_error *err, uint8_t category, int id) |
| { |
| err->category = category; |
| |
| if (category == AVDTP_ERRNO) |
| err->err.posix_errno = id; |
| else |
| err->err.error_code = id; |
| } |
| |
| uint8_t avdtp_error_category(struct avdtp_error *err) |
| { |
| return err->category; |
| } |
| |
| int avdtp_error_error_code(struct avdtp_error *err) |
| { |
| assert(err->category != AVDTP_ERRNO); |
| return err->err.error_code; |
| } |
| |
| int avdtp_error_posix_errno(struct avdtp_error *err) |
| { |
| assert(err->category == AVDTP_ERRNO); |
| return err->err.posix_errno; |
| } |
| |
| static struct avdtp_stream *find_stream_by_rseid(struct avdtp *session, |
| uint8_t rseid) |
| { |
| GSList *l; |
| |
| for (l = session->streams; l != NULL; l = g_slist_next(l)) { |
| struct avdtp_stream *stream = l->data; |
| |
| if (stream->rseid == rseid) |
| return stream; |
| } |
| |
| return NULL; |
| } |
| |
| static struct avdtp_remote_sep *find_remote_sep(GSList *seps, uint8_t seid) |
| { |
| GSList *l; |
| |
| for (l = seps; l != NULL; l = g_slist_next(l)) { |
| struct avdtp_remote_sep *sep = l->data; |
| |
| if (sep->seid == seid) |
| return sep; |
| } |
| |
| return NULL; |
| } |
| |
| static void stream_free(void *data) |
| { |
| struct avdtp_stream *stream = data; |
| struct avdtp_remote_sep *rsep; |
| |
| stream->lsep->info.inuse = 0; |
| stream->lsep->stream = NULL; |
| |
| rsep = find_remote_sep(stream->session->seps, stream->rseid); |
| if (rsep) |
| rsep->stream = NULL; |
| |
| if (stream->timer) |
| g_source_remove(stream->timer); |
| |
| if (stream->start_timer > 0) |
| g_source_remove(stream->start_timer); |
| |
| if (stream->io) |
| close_stream(stream); |
| |
| if (stream->io_id) |
| g_source_remove(stream->io_id); |
| |
| g_slist_free_full(stream->callbacks, g_free); |
| g_slist_free_full(stream->caps, g_free); |
| |
| g_free(stream); |
| } |
| |
| static gboolean transport_cb(GIOChannel *chan, GIOCondition cond, |
| gpointer data) |
| { |
| struct avdtp_stream *stream = data; |
| struct avdtp_local_sep *sep = stream->lsep; |
| |
| if (stream->close_int && sep->cfm && sep->cfm->close) |
| sep->cfm->close(stream->session, sep, stream, NULL, |
| sep->user_data); |
| |
| if (!(cond & G_IO_NVAL)) |
| close_stream(stream); |
| |
| stream->io_id = 0; |
| |
| if (!stream->abort_int) |
| avdtp_sep_set_state(stream->session, sep, AVDTP_STATE_IDLE); |
| |
| return FALSE; |
| } |
| |
| static void handle_transport_connect(struct avdtp *session, GIOChannel *io, |
| uint16_t imtu, uint16_t omtu) |
| { |
| struct avdtp_stream *stream = session->pending_open; |
| struct avdtp_local_sep *sep = stream->lsep; |
| |
| session->pending_open = NULL; |
| |
| if (stream->timer) { |
| g_source_remove(stream->timer); |
| stream->timer = 0; |
| } |
| |
| if (io == NULL) |
| return; |
| |
| if (stream->io == NULL) |
| stream->io = g_io_channel_ref(io); |
| |
| stream->omtu = omtu; |
| stream->imtu = imtu; |
| |
| avdtp_sep_set_state(session, sep, AVDTP_STATE_OPEN); |
| |
| stream->io_id = g_io_add_watch(io, G_IO_ERR | G_IO_HUP | G_IO_NVAL, |
| (GIOFunc) transport_cb, stream); |
| } |
| |
| static int pending_req_cmp(gconstpointer a, gconstpointer b) |
| { |
| const struct pending_req *req = a; |
| const struct avdtp_stream *stream = b; |
| |
| if (req->stream == stream) |
| return 0; |
| |
| return -1; |
| } |
| |
| static void cleanup_queue(struct avdtp *session, struct avdtp_stream *stream) |
| { |
| GSList *l; |
| struct pending_req *req; |
| |
| while ((l = g_slist_find_custom(session->prio_queue, stream, |
| pending_req_cmp))) { |
| req = l->data; |
| pending_req_free(req); |
| session->prio_queue = g_slist_remove(session->prio_queue, req); |
| } |
| |
| while ((l = g_slist_find_custom(session->req_queue, stream, |
| pending_req_cmp))) { |
| req = l->data; |
| pending_req_free(req); |
| session->req_queue = g_slist_remove(session->req_queue, req); |
| } |
| } |
| |
| static void handle_unanswered_req(struct avdtp *session, |
| struct avdtp_stream *stream) |
| { |
| struct pending_req *req; |
| struct avdtp_local_sep *lsep; |
| struct avdtp_error err; |
| |
| if (!session->req->timeout) |
| /* Request is in process */ |
| return; |
| |
| if (session->req->signal_id == AVDTP_ABORT) { |
| /* Avoid freeing the Abort request here */ |
| DBG("handle_unanswered_req: Abort req, returning"); |
| session->req->stream = NULL; |
| return; |
| } |
| |
| req = session->req; |
| session->req = NULL; |
| |
| avdtp_error_init(&err, AVDTP_ERRNO, EIO); |
| |
| lsep = stream->lsep; |
| |
| switch (req->signal_id) { |
| case AVDTP_RECONFIGURE: |
| error("No reply to Reconfigure request"); |
| if (lsep && lsep->cfm && lsep->cfm->reconfigure) |
| lsep->cfm->reconfigure(session, lsep, stream, &err, |
| lsep->user_data); |
| break; |
| case AVDTP_OPEN: |
| error("No reply to Open request"); |
| if (lsep && lsep->cfm && lsep->cfm->open) |
| lsep->cfm->open(session, lsep, stream, &err, |
| lsep->user_data); |
| break; |
| case AVDTP_START: |
| error("No reply to Start request"); |
| if (lsep && lsep->cfm && lsep->cfm->start) |
| lsep->cfm->start(session, lsep, stream, &err, |
| lsep->user_data); |
| break; |
| case AVDTP_SUSPEND: |
| error("No reply to Suspend request"); |
| if (lsep && lsep->cfm && lsep->cfm->suspend) |
| lsep->cfm->suspend(session, lsep, stream, &err, |
| lsep->user_data); |
| break; |
| case AVDTP_CLOSE: |
| error("No reply to Close request"); |
| if (lsep && lsep->cfm && lsep->cfm->close) |
| lsep->cfm->close(session, lsep, stream, &err, |
| lsep->user_data); |
| break; |
| case AVDTP_SET_CONFIGURATION: |
| error("No reply to SetConfiguration request"); |
| if (lsep && lsep->cfm && lsep->cfm->set_configuration) |
| lsep->cfm->set_configuration(session, lsep, stream, |
| &err, lsep->user_data); |
| } |
| |
| pending_req_free(req); |
| } |
| |
| static void avdtp_sep_set_state(struct avdtp *session, |
| struct avdtp_local_sep *sep, |
| avdtp_state_t state) |
| { |
| struct avdtp_stream *stream = sep->stream; |
| avdtp_state_t old_state; |
| struct avdtp_error err, *err_ptr = NULL; |
| GSList *l; |
| |
| if (!stream) { |
| error("Error changing sep state: stream not available"); |
| return; |
| } |
| |
| if (sep->state == state) { |
| avdtp_error_init(&err, AVDTP_ERRNO, EIO); |
| DBG("stream state change failed: %s", avdtp_strerror(&err)); |
| err_ptr = &err; |
| } else { |
| err_ptr = NULL; |
| DBG("stream state changed: %s -> %s", |
| avdtp_statestr(sep->state), |
| avdtp_statestr(state)); |
| } |
| |
| old_state = sep->state; |
| sep->state = state; |
| |
| switch (state) { |
| case AVDTP_STATE_CONFIGURED: |
| if (sep->info.type == AVDTP_SEP_TYPE_SINK) |
| avdtp_delay_report(session, stream, stream->delay); |
| break; |
| case AVDTP_STATE_OPEN: |
| stream->starting = FALSE; |
| break; |
| case AVDTP_STATE_STREAMING: |
| if (stream->start_timer) { |
| g_source_remove(stream->start_timer); |
| stream->start_timer = 0; |
| } |
| stream->open_acp = FALSE; |
| break; |
| case AVDTP_STATE_CLOSING: |
| case AVDTP_STATE_ABORTING: |
| if (stream->start_timer) { |
| g_source_remove(stream->start_timer); |
| stream->start_timer = 0; |
| } |
| break; |
| case AVDTP_STATE_IDLE: |
| if (stream->start_timer) { |
| g_source_remove(stream->start_timer); |
| stream->start_timer = 0; |
| } |
| if (session->pending_open == stream) |
| handle_transport_connect(session, NULL, 0, 0); |
| if (session->req && session->req->stream == stream) |
| handle_unanswered_req(session, stream); |
| /* Remove pending commands for this stream from the queue */ |
| cleanup_queue(session, stream); |
| break; |
| default: |
| break; |
| } |
| |
| l = stream->callbacks; |
| while (l != NULL) { |
| struct stream_callback *cb = l->data; |
| l = g_slist_next(l); |
| cb->cb(stream, old_state, state, err_ptr, cb->user_data); |
| } |
| |
| if (state == AVDTP_STATE_IDLE && |
| g_slist_find(session->streams, stream)) { |
| session->streams = g_slist_remove(session->streams, stream); |
| stream_free(stream); |
| } |
| |
| if (session->io && session->shutdown && session->streams == NULL) { |
| int sock = g_io_channel_unix_get_fd(session->io); |
| shutdown(sock, SHUT_RDWR); |
| } |
| } |
| |
| static void finalize_discovery(struct avdtp *session, int err) |
| { |
| struct discover_callback *discover = session->discover; |
| struct avdtp_error avdtp_err; |
| |
| if (!discover) |
| return; |
| |
| session->discover = NULL; |
| |
| avdtp_error_init(&avdtp_err, AVDTP_ERRNO, err); |
| |
| if (discover->id > 0) |
| g_source_remove(discover->id); |
| |
| if (discover->cb) |
| discover->cb(session, session->seps, err ? &avdtp_err : NULL, |
| discover->user_data); |
| g_free(discover); |
| } |
| |
| static void release_stream(struct avdtp_stream *stream, struct avdtp *session) |
| { |
| struct avdtp_local_sep *sep = stream->lsep; |
| |
| if (sep->cfm && sep->cfm->abort && |
| (sep->state != AVDTP_STATE_ABORTING || |
| stream->abort_int)) |
| sep->cfm->abort(session, sep, stream, NULL, sep->user_data); |
| |
| avdtp_sep_set_state(session, sep, AVDTP_STATE_IDLE); |
| } |
| |
| static void sep_free(gpointer data) |
| { |
| struct avdtp_remote_sep *sep = data; |
| |
| g_slist_free_full(sep->caps, g_free); |
| g_free(sep); |
| } |
| |
| static void avdtp_free(void *data) |
| { |
| struct avdtp *session = data; |
| |
| DBG("%p", session); |
| |
| g_slist_free_full(session->streams, stream_free); |
| |
| if (session->io) { |
| g_io_channel_shutdown(session->io, FALSE, NULL); |
| g_io_channel_unref(session->io); |
| } |
| |
| if (session->io_id) { |
| g_source_remove(session->io_id); |
| session->io_id = 0; |
| } |
| |
| if (session->req) |
| pending_req_free(session->req); |
| |
| g_slist_free_full(session->req_queue, pending_req_free); |
| g_slist_free_full(session->prio_queue, pending_req_free); |
| g_slist_free_full(session->seps, sep_free); |
| g_slist_free_full(session->disconnect, g_free); |
| |
| /* Free copy of the SEP list */ |
| session->lseps = NULL; |
| |
| g_free(session->buf); |
| |
| g_free(session); |
| } |
| |
| static void process_disconnect(void *data) |
| { |
| struct disconnect_callback *callback = data; |
| |
| callback->cb(callback->user_data); |
| |
| g_free(callback); |
| } |
| |
| static void connection_lost(struct avdtp *session, int err) |
| { |
| DBG("Disconnected: %s (%d)", strerror(err), err); |
| |
| g_slist_foreach(session->streams, (GFunc) release_stream, session); |
| session->streams = NULL; |
| |
| avdtp_ref(session); |
| |
| finalize_discovery(session, err); |
| |
| g_slist_free_full(session->disconnect, process_disconnect); |
| session->disconnect = NULL; |
| |
| avdtp_unref(session); |
| } |
| |
| void avdtp_unref(struct avdtp *session) |
| { |
| if (!session) |
| return; |
| |
| session->ref--; |
| |
| DBG("%p: ref=%d", session, session->ref); |
| |
| if (session->ref > 0) |
| return; |
| |
| finalize_discovery(session, ECONNABORTED); |
| |
| avdtp_free(session); |
| } |
| |
| struct avdtp *avdtp_ref(struct avdtp *session) |
| { |
| session->ref++; |
| |
| DBG("%p: ref=%d", session, session->ref); |
| |
| return session; |
| } |
| |
| static bool match_by_seid(const void *data, const void *user_data) |
| { |
| const struct avdtp_local_sep *sep = data; |
| uint8_t seid = PTR_TO_UINT(user_data); |
| |
| return sep->info.seid == seid; |
| } |
| |
| static struct avdtp_local_sep *find_local_sep_by_seid(struct avdtp *session, |
| uint8_t seid) |
| { |
| return queue_find(session->lseps, match_by_seid, INT_TO_PTR(seid)); |
| } |
| |
| struct avdtp_remote_sep *avdtp_find_remote_sep(struct avdtp *session, |
| struct avdtp_local_sep *lsep) |
| { |
| GSList *l; |
| |
| if (lsep->info.inuse) |
| return NULL; |
| |
| for (l = session->seps; l != NULL; l = g_slist_next(l)) { |
| struct avdtp_remote_sep *sep = l->data; |
| struct avdtp_service_capability *cap; |
| struct avdtp_media_codec_capability *codec_data; |
| |
| /* Type must be different: source <-> sink */ |
| if (sep->type == lsep->info.type) |
| continue; |
| |
| if (sep->media_type != lsep->info.media_type) |
| continue; |
| |
| if (!sep->codec) |
| continue; |
| |
| cap = sep->codec; |
| codec_data = (void *) cap->data; |
| |
| if (codec_data->media_codec_type != lsep->codec) |
| continue; |
| |
| /* FIXME: Add Vendor Specific Codec match to SEP callback */ |
| if (lsep->codec == A2DP_CODEC_VENDOR) { |
| a2dp_vendor_codec_t *vndcodec = |
| (void *) codec_data->data; |
| |
| if (btohl(vndcodec->vendor_id) != lsep->vndcodec_vendor) |
| continue; |
| |
| if (btohs(vndcodec->codec_id) != lsep->vndcodec_codec) |
| continue; |
| } |
| |
| if (sep->stream == NULL) |
| return sep; |
| } |
| |
| return NULL; |
| } |
| |
| static GSList *caps_to_list(uint8_t *data, int size, |
| struct avdtp_service_capability **codec, |
| gboolean *delay_reporting) |
| { |
| GSList *caps; |
| int processed; |
| |
| if (delay_reporting) |
| *delay_reporting = FALSE; |
| |
| for (processed = 0, caps = NULL; processed + 2 <= size;) { |
| struct avdtp_service_capability *cap; |
| uint8_t length, category; |
| |
| category = data[0]; |
| length = data[1]; |
| |
| if (processed + 2 + length > size) { |
| error("Invalid capability data in getcap resp"); |
| break; |
| } |
| |
| cap = g_malloc(sizeof(struct avdtp_service_capability) + |
| length); |
| memcpy(cap, data, 2 + length); |
| |
| processed += 2 + length; |
| data += 2 + length; |
| |
| caps = g_slist_append(caps, cap); |
| |
| if (category == AVDTP_MEDIA_CODEC && |
| length >= |
| sizeof(struct avdtp_media_codec_capability)) |
| *codec = cap; |
| else if (category == AVDTP_DELAY_REPORTING && delay_reporting) |
| *delay_reporting = TRUE; |
| } |
| |
| return caps; |
| } |
| |
| static gboolean avdtp_unknown_cmd(struct avdtp *session, uint8_t transaction, |
| uint8_t signal_id) |
| { |
| return avdtp_send(session, transaction, AVDTP_MSG_TYPE_GEN_REJECT, |
| signal_id, NULL, 0); |
| } |
| |
| static void copy_seps(void *data, void *user_data) |
| { |
| struct avdtp_local_sep *sep = data; |
| struct seid_info **p = user_data; |
| |
| memcpy(*p, &sep->info, sizeof(struct seid_info)); |
| *p = *p + 1; |
| } |
| |
| static gboolean avdtp_discover_cmd(struct avdtp *session, uint8_t transaction, |
| void *buf, int size) |
| { |
| unsigned int rsp_size, sep_count; |
| struct seid_info *seps, *p; |
| gboolean ret; |
| |
| sep_count = queue_length(session->lseps); |
| |
| if (sep_count == 0) { |
| uint8_t err = AVDTP_NOT_SUPPORTED_COMMAND; |
| return avdtp_send(session, transaction, AVDTP_MSG_TYPE_REJECT, |
| AVDTP_DISCOVER, &err, sizeof(err)); |
| } |
| |
| rsp_size = sep_count * sizeof(struct seid_info); |
| |
| seps = g_new0(struct seid_info, sep_count); |
| p = seps; |
| |
| queue_foreach(session->lseps, copy_seps, &p); |
| |
| ret = avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT, |
| AVDTP_DISCOVER, seps, rsp_size); |
| g_free(seps); |
| |
| return ret; |
| } |
| |
| static gboolean avdtp_getcap_cmd(struct avdtp *session, uint8_t transaction, |
| struct seid_req *req, unsigned int size, |
| gboolean get_all) |
| { |
| GSList *l, *caps; |
| struct avdtp_local_sep *sep = NULL; |
| unsigned int rsp_size; |
| uint8_t err, buf[1024], *ptr = buf; |
| uint8_t cmd; |
| |
| cmd = get_all ? AVDTP_GET_ALL_CAPABILITIES : AVDTP_GET_CAPABILITIES; |
| |
| if (size < sizeof(struct seid_req)) { |
| err = AVDTP_BAD_LENGTH; |
| goto failed; |
| } |
| |
| sep = find_local_sep_by_seid(session, req->acp_seid); |
| if (!sep) { |
| err = AVDTP_BAD_ACP_SEID; |
| goto failed; |
| } |
| |
| if (!sep->ind->get_capability(session, sep, &caps, &err, |
| sep->user_data)) |
| goto failed; |
| |
| for (l = caps, rsp_size = 0; l != NULL; l = g_slist_next(l)) { |
| struct avdtp_service_capability *cap = l->data; |
| |
| if (rsp_size + cap->length + 2 > sizeof(buf)) |
| break; |
| |
| memcpy(ptr, cap, cap->length + 2); |
| rsp_size += cap->length + 2; |
| ptr += cap->length + 2; |
| |
| g_free(cap); |
| } |
| |
| if (get_all && sep->delay_reporting) { |
| ptr[0] = AVDTP_DELAY_REPORTING; |
| ptr[1] = 0x00; |
| rsp_size += 2; |
| } |
| |
| g_slist_free(caps); |
| |
| return avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT, cmd, |
| buf, rsp_size); |
| |
| failed: |
| return avdtp_send(session, transaction, AVDTP_MSG_TYPE_REJECT, cmd, |
| &err, sizeof(err)); |
| } |
| |
| static void setconf_cb(struct avdtp *session, struct avdtp_stream *stream, |
| struct avdtp_error *err) |
| { |
| struct conf_rej rej; |
| struct avdtp_local_sep *sep; |
| |
| if (err != NULL) { |
| rej.error = AVDTP_UNSUPPORTED_CONFIGURATION; |
| rej.category = err->err.error_code; |
| avdtp_send(session, session->in.transaction, |
| AVDTP_MSG_TYPE_REJECT, AVDTP_SET_CONFIGURATION, |
| &rej, sizeof(rej)); |
| return; |
| } |
| |
| if (!avdtp_send(session, session->in.transaction, AVDTP_MSG_TYPE_ACCEPT, |
| AVDTP_SET_CONFIGURATION, NULL, 0)) { |
| stream_free(stream); |
| return; |
| } |
| |
| sep = stream->lsep; |
| sep->stream = stream; |
| sep->info.inuse = 1; |
| session->streams = g_slist_append(session->streams, stream); |
| |
| avdtp_sep_set_state(session, sep, AVDTP_STATE_CONFIGURED); |
| } |
| |
| static gboolean avdtp_setconf_cmd(struct avdtp *session, uint8_t transaction, |
| struct setconf_req *req, unsigned int size) |
| { |
| struct conf_rej rej; |
| struct avdtp_local_sep *sep; |
| struct avdtp_stream *stream; |
| uint8_t err, category = 0x00; |
| GSList *l; |
| |
| if (size < sizeof(struct setconf_req)) { |
| error("Too short getcap request"); |
| return FALSE; |
| } |
| |
| sep = find_local_sep_by_seid(session, req->acp_seid); |
| if (!sep) { |
| err = AVDTP_BAD_ACP_SEID; |
| goto failed; |
| } |
| |
| if (sep->stream) { |
| err = AVDTP_SEP_IN_USE; |
| goto failed; |
| } |
| |
| stream = g_new0(struct avdtp_stream, 1); |
| stream->session = session; |
| stream->lsep = sep; |
| stream->rseid = req->int_seid; |
| stream->caps = caps_to_list(req->caps, |
| size - sizeof(struct setconf_req), |
| &stream->codec, |
| &stream->delay_reporting); |
| |
| /* |
| * Verify that the Media Transport capability's length = 0. |
| * Reject otherwise |
| */ |
| for (l = stream->caps; l != NULL; l = g_slist_next(l)) { |
| struct avdtp_service_capability *cap = l->data; |
| |
| if (cap->category == AVDTP_MEDIA_TRANSPORT && |
| cap->length != 0) { |
| err = AVDTP_BAD_MEDIA_TRANSPORT_FORMAT; |
| goto failed_stream; |
| } |
| } |
| |
| if (stream->delay_reporting && session->version < 0x0103) |
| session->version = 0x0103; |
| |
| if (sep->ind && sep->ind->set_configuration) { |
| if (!sep->ind->set_configuration(session, sep, stream, |
| stream->caps, |
| setconf_cb, |
| sep->user_data)) { |
| err = AVDTP_UNSUPPORTED_CONFIGURATION; |
| category = 0x00; |
| goto failed_stream; |
| } |
| } else { |
| if (!avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT, |
| AVDTP_SET_CONFIGURATION, NULL, 0)) { |
| stream_free(stream); |
| return FALSE; |
| } |
| |
| sep->stream = stream; |
| sep->info.inuse = 1; |
| session->streams = g_slist_append(session->streams, stream); |
| |
| avdtp_sep_set_state(session, sep, AVDTP_STATE_CONFIGURED); |
| } |
| |
| return TRUE; |
| |
| failed_stream: |
| stream_free(stream); |
| failed: |
| rej.error = err; |
| rej.category = category; |
| return avdtp_send(session, transaction, AVDTP_MSG_TYPE_REJECT, |
| AVDTP_SET_CONFIGURATION, &rej, sizeof(rej)); |
| } |
| |
| static gboolean avdtp_getconf_cmd(struct avdtp *session, uint8_t transaction, |
| struct seid_req *req, int size) |
| { |
| GSList *l; |
| struct avdtp_local_sep *sep = NULL; |
| int rsp_size; |
| uint8_t err; |
| uint8_t buf[1024]; |
| uint8_t *ptr = buf; |
| |
| if (size < (int) sizeof(struct seid_req)) { |
| error("Too short getconf request"); |
| return FALSE; |
| } |
| |
| memset(buf, 0, sizeof(buf)); |
| |
| sep = find_local_sep_by_seid(session, req->acp_seid); |
| if (!sep) { |
| err = AVDTP_BAD_ACP_SEID; |
| goto failed; |
| } |
| if (!sep->stream || !sep->stream->caps) { |
| err = AVDTP_UNSUPPORTED_CONFIGURATION; |
| goto failed; |
| } |
| |
| for (l = sep->stream->caps, rsp_size = 0; l; l = g_slist_next(l)) { |
| struct avdtp_service_capability *cap = l->data; |
| |
| if (rsp_size + cap->length + 2 > (int) sizeof(buf)) |
| break; |
| |
| memcpy(ptr, cap, cap->length + 2); |
| rsp_size += cap->length + 2; |
| ptr += cap->length + 2; |
| } |
| |
| return avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT, |
| AVDTP_GET_CONFIGURATION, buf, rsp_size); |
| |
| failed: |
| return avdtp_send(session, transaction, AVDTP_MSG_TYPE_REJECT, |
| AVDTP_GET_CONFIGURATION, &err, sizeof(err)); |
| } |
| |
| static gboolean avdtp_reconf_cmd(struct avdtp *session, uint8_t transaction, |
| struct seid_req *req, int size) |
| { |
| struct conf_rej rej; |
| |
| rej.error = AVDTP_NOT_SUPPORTED_COMMAND; |
| rej.category = 0x00; |
| |
| return avdtp_send(session, transaction, AVDTP_MSG_TYPE_REJECT, |
| AVDTP_RECONFIGURE, &rej, sizeof(rej)); |
| } |
| |
| static void check_seid_collision(struct pending_req *req, uint8_t id) |
| { |
| struct seid_req *seid = req->data; |
| |
| if (seid->acp_seid == id) |
| req->collided = TRUE; |
| } |
| |
| static void check_start_collision(struct pending_req *req, uint8_t id) |
| { |
| struct start_req *start = req->data; |
| struct seid *seid = &start->first_seid; |
| int count = 1 + req->data_size - sizeof(struct start_req); |
| int i; |
| |
| for (i = 0; i < count; i++, seid++) { |
| if (seid->seid == id) { |
| req->collided = TRUE; |
| return; |
| } |
| } |
| } |
| |
| static void check_suspend_collision(struct pending_req *req, uint8_t id) |
| { |
| struct suspend_req *suspend = req->data; |
| struct seid *seid = &suspend->first_seid; |
| int count = 1 + req->data_size - sizeof(struct suspend_req); |
| int i; |
| |
| for (i = 0; i < count; i++, seid++) { |
| if (seid->seid == id) { |
| req->collided = TRUE; |
| return; |
| } |
| } |
| } |
| |
| static void avdtp_check_collision(struct avdtp *session, uint8_t cmd, |
| struct avdtp_stream *stream) |
| { |
| struct pending_req *req = session->req; |
| |
| if (req == NULL || (req->signal_id != cmd && cmd != AVDTP_ABORT)) |
| return; |
| |
| if (cmd == AVDTP_ABORT) |
| cmd = req->signal_id; |
| |
| switch (cmd) { |
| case AVDTP_OPEN: |
| case AVDTP_CLOSE: |
| check_seid_collision(req, stream->rseid); |
| break; |
| case AVDTP_START: |
| check_start_collision(req, stream->rseid); |
| break; |
| case AVDTP_SUSPEND: |
| check_suspend_collision(req, stream->rseid); |
| break; |
| } |
| } |
| |
| static gboolean avdtp_open_cmd(struct avdtp *session, uint8_t transaction, |
| struct seid_req *req, unsigned int size) |
| { |
| struct avdtp_local_sep *sep; |
| struct avdtp_stream *stream; |
| uint8_t err; |
| |
| if (size < sizeof(struct seid_req)) { |
| error("Too short abort request"); |
| return FALSE; |
| } |
| |
| sep = find_local_sep_by_seid(session, req->acp_seid); |
| if (!sep) { |
| err = AVDTP_BAD_ACP_SEID; |
| goto failed; |
| } |
| |
| if (sep->state != AVDTP_STATE_CONFIGURED) { |
| err = AVDTP_BAD_STATE; |
| goto failed; |
| } |
| |
| stream = sep->stream; |
| |
| if (sep->ind && sep->ind->open) { |
| if (!sep->ind->open(session, sep, stream, &err, |
| sep->user_data)) |
| goto failed; |
| } |
| |
| avdtp_check_collision(session, AVDTP_OPEN, stream); |
| |
| if (!avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT, |
| AVDTP_OPEN, NULL, 0)) |
| return FALSE; |
| |
| stream->open_acp = TRUE; |
| session->pending_open = stream; |
| stream->timer = g_timeout_add_seconds(REQ_TIMEOUT, |
| stream_open_timeout, |
| stream); |
| |
| return TRUE; |
| |
| failed: |
| return avdtp_send(session, transaction, AVDTP_MSG_TYPE_REJECT, |
| AVDTP_OPEN, &err, sizeof(err)); |
| } |
| |
| static gboolean avdtp_start_cmd(struct avdtp *session, uint8_t transaction, |
| struct start_req *req, unsigned int size) |
| { |
| struct avdtp_local_sep *sep; |
| struct avdtp_stream *stream; |
| struct stream_rej rej; |
| struct seid *seid; |
| uint8_t err, failed_seid; |
| int seid_count, i; |
| |
| if (size < sizeof(struct start_req)) { |
| error("Too short start request"); |
| return FALSE; |
| } |
| |
| seid_count = 1 + size - sizeof(struct start_req); |
| |
| seid = &req->first_seid; |
| |
| for (i = 0; i < seid_count; i++, seid++) { |
| failed_seid = seid->seid; |
| |
| sep = find_local_sep_by_seid(session, seid->seid); |
| if (!sep || !sep->stream) { |
| err = AVDTP_BAD_ACP_SEID; |
| goto failed; |
| } |
| |
| stream = sep->stream; |
| |
| /* Also reject start cmd if state is not open */ |
| if (sep->state != AVDTP_STATE_OPEN) { |
| err = AVDTP_BAD_STATE; |
| goto failed; |
| } |
| stream->starting = TRUE; |
| |
| if (sep->ind && sep->ind->start) { |
| if (!sep->ind->start(session, sep, stream, &err, |
| sep->user_data)) |
| goto failed; |
| } |
| |
| avdtp_check_collision(session, AVDTP_START, stream); |
| |
| avdtp_sep_set_state(session, sep, AVDTP_STATE_STREAMING); |
| } |
| |
| return avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT, |
| AVDTP_START, NULL, 0); |
| |
| failed: |
| DBG("Rejecting (%d)", err); |
| memset(&rej, 0, sizeof(rej)); |
| rej.acp_seid = failed_seid; |
| rej.error = err; |
| return avdtp_send(session, transaction, AVDTP_MSG_TYPE_REJECT, |
| AVDTP_START, &rej, sizeof(rej)); |
| } |
| |
| static gboolean avdtp_close_cmd(struct avdtp *session, uint8_t transaction, |
| struct seid_req *req, unsigned int size) |
| { |
| struct avdtp_local_sep *sep; |
| struct avdtp_stream *stream; |
| uint8_t err; |
| |
| if (size < sizeof(struct seid_req)) { |
| error("Too short close request"); |
| return FALSE; |
| } |
| |
| sep = find_local_sep_by_seid(session, req->acp_seid); |
| if (!sep || !sep->stream) { |
| err = AVDTP_BAD_ACP_SEID; |
| goto failed; |
| } |
| |
| if (sep->state != AVDTP_STATE_OPEN && |
| sep->state != AVDTP_STATE_STREAMING) { |
| err = AVDTP_BAD_STATE; |
| goto failed; |
| } |
| |
| stream = sep->stream; |
| |
| if (sep->ind && sep->ind->close) { |
| if (!sep->ind->close(session, sep, stream, &err, |
| sep->user_data)) |
| goto failed; |
| } |
| |
| avdtp_check_collision(session, AVDTP_CLOSE, stream); |
| |
| avdtp_sep_set_state(session, sep, AVDTP_STATE_CLOSING); |
| |
| if (!avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT, |
| AVDTP_CLOSE, NULL, 0)) |
| return FALSE; |
| |
| stream->timer = g_timeout_add_seconds(REQ_TIMEOUT, |
| stream_close_timeout, |
| stream); |
| |
| return TRUE; |
| |
| failed: |
| return avdtp_send(session, transaction, AVDTP_MSG_TYPE_REJECT, |
| AVDTP_CLOSE, &err, sizeof(err)); |
| } |
| |
| static gboolean avdtp_suspend_cmd(struct avdtp *session, uint8_t transaction, |
| struct suspend_req *req, unsigned int size) |
| { |
| struct avdtp_local_sep *sep; |
| struct avdtp_stream *stream; |
| struct stream_rej rej; |
| struct seid *seid; |
| uint8_t err, failed_seid; |
| int seid_count, i; |
| |
| if (size < sizeof(struct suspend_req)) { |
| error("Too short suspend request"); |
| return FALSE; |
| } |
| |
| seid_count = 1 + size - sizeof(struct suspend_req); |
| |
| seid = &req->first_seid; |
| |
| for (i = 0; i < seid_count; i++, seid++) { |
| failed_seid = seid->seid; |
| |
| sep = find_local_sep_by_seid(session, seid->seid); |
| if (!sep || !sep->stream) { |
| err = AVDTP_BAD_ACP_SEID; |
| goto failed; |
| } |
| |
| stream = sep->stream; |
| |
| if (sep->state != AVDTP_STATE_STREAMING) { |
| err = AVDTP_BAD_STATE; |
| goto failed; |
| } |
| |
| if (sep->ind && sep->ind->suspend) { |
| if (!sep->ind->suspend(session, sep, stream, &err, |
| sep->user_data)) |
| goto failed; |
| } |
| |
| avdtp_check_collision(session, AVDTP_SUSPEND, stream); |
| |
| avdtp_sep_set_state(session, sep, AVDTP_STATE_OPEN); |
| } |
| |
| return avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT, |
| AVDTP_SUSPEND, NULL, 0); |
| |
| failed: |
| memset(&rej, 0, sizeof(rej)); |
| rej.acp_seid = failed_seid; |
| rej.error = err; |
| return avdtp_send(session, transaction, AVDTP_MSG_TYPE_REJECT, |
| AVDTP_SUSPEND, &rej, sizeof(rej)); |
| } |
| |
| static gboolean avdtp_abort_cmd(struct avdtp *session, uint8_t transaction, |
| struct seid_req *req, unsigned int size) |
| { |
| struct avdtp_local_sep *sep; |
| uint8_t err; |
| gboolean ret; |
| |
| if (size < sizeof(struct seid_req)) { |
| error("Too short abort request"); |
| return FALSE; |
| } |
| |
| sep = find_local_sep_by_seid(session, req->acp_seid); |
| if (!sep || !sep->stream) |
| return TRUE; |
| |
| if (sep->ind && sep->ind->abort) |
| sep->ind->abort(session, sep, sep->stream, &err, |
| sep->user_data); |
| |
| avdtp_check_collision(session, AVDTP_ABORT, sep->stream); |
| |
| ret = avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT, |
| AVDTP_ABORT, NULL, 0); |
| if (ret) |
| avdtp_sep_set_state(session, sep, AVDTP_STATE_ABORTING); |
| |
| return ret; |
| } |
| |
| static gboolean avdtp_secctl_cmd(struct avdtp *session, uint8_t transaction, |
| struct seid_req *req, int size) |
| { |
| return avdtp_unknown_cmd(session, transaction, AVDTP_SECURITY_CONTROL); |
| } |
| |
| static gboolean avdtp_delayreport_cmd(struct avdtp *session, |
| uint8_t transaction, |
| struct delay_req *req, |
| unsigned int size) |
| { |
| struct avdtp_local_sep *sep; |
| struct avdtp_stream *stream; |
| uint8_t err; |
| |
| if (size < sizeof(struct delay_req)) { |
| error("Too short delay report request"); |
| return FALSE; |
| } |
| |
| sep = find_local_sep_by_seid(session, req->acp_seid); |
| if (!sep || !sep->stream) { |
| err = AVDTP_BAD_ACP_SEID; |
| goto failed; |
| } |
| |
| stream = sep->stream; |
| |
| switch (sep->state) { |
| case AVDTP_STATE_IDLE: |
| case AVDTP_STATE_ABORTING: |
| case AVDTP_STATE_CLOSING: |
| err = AVDTP_BAD_STATE; |
| goto failed; |
| case AVDTP_STATE_CONFIGURED: |
| case AVDTP_STATE_OPEN: |
| case AVDTP_STATE_STREAMING: |
| default: |
| break; |
| } |
| |
| stream->delay = ntohs(req->delay); |
| |
| if (sep->ind && sep->ind->delayreport) { |
| if (!sep->ind->delayreport(session, sep, stream->rseid, |
| stream->delay, &err, |
| sep->user_data)) |
| goto failed; |
| } |
| |
| return avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT, |
| AVDTP_DELAY_REPORT, NULL, 0); |
| |
| failed: |
| return avdtp_send(session, transaction, AVDTP_MSG_TYPE_REJECT, |
| AVDTP_DELAY_REPORT, &err, sizeof(err)); |
| } |
| |
| static gboolean avdtp_parse_cmd(struct avdtp *session, uint8_t transaction, |
| uint8_t signal_id, void *buf, int size) |
| { |
| switch (signal_id) { |
| case AVDTP_DISCOVER: |
| DBG("Received DISCOVER_CMD"); |
| return avdtp_discover_cmd(session, transaction, buf, size); |
| case AVDTP_GET_CAPABILITIES: |
| DBG("Received GET_CAPABILITIES_CMD"); |
| return avdtp_getcap_cmd(session, transaction, buf, size, |
| FALSE); |
| case AVDTP_GET_ALL_CAPABILITIES: |
| DBG("Received GET_ALL_CAPABILITIES_CMD"); |
| return avdtp_getcap_cmd(session, transaction, buf, size, TRUE); |
| case AVDTP_SET_CONFIGURATION: |
| DBG("Received SET_CONFIGURATION_CMD"); |
| return avdtp_setconf_cmd(session, transaction, buf, size); |
| case AVDTP_GET_CONFIGURATION: |
| DBG("Received GET_CONFIGURATION_CMD"); |
| return avdtp_getconf_cmd(session, transaction, buf, size); |
| case AVDTP_RECONFIGURE: |
| DBG("Received RECONFIGURE_CMD"); |
| return avdtp_reconf_cmd(session, transaction, buf, size); |
| case AVDTP_OPEN: |
| DBG("Received OPEN_CMD"); |
| return avdtp_open_cmd(session, transaction, buf, size); |
| case AVDTP_START: |
| DBG("Received START_CMD"); |
| return avdtp_start_cmd(session, transaction, buf, size); |
| case AVDTP_CLOSE: |
| DBG("Received CLOSE_CMD"); |
| return avdtp_close_cmd(session, transaction, buf, size); |
| case AVDTP_SUSPEND: |
| DBG("Received SUSPEND_CMD"); |
| return avdtp_suspend_cmd(session, transaction, buf, size); |
| case AVDTP_ABORT: |
| DBG("Received ABORT_CMD"); |
| return avdtp_abort_cmd(session, transaction, buf, size); |
| case AVDTP_SECURITY_CONTROL: |
| DBG("Received SECURITY_CONTROL_CMD"); |
| return avdtp_secctl_cmd(session, transaction, buf, size); |
| case AVDTP_DELAY_REPORT: |
| DBG("Received DELAY_REPORT_CMD"); |
| return avdtp_delayreport_cmd(session, transaction, buf, size); |
| default: |
| DBG("Received unknown request id %u", signal_id); |
| return avdtp_unknown_cmd(session, transaction, signal_id); |
| } |
| } |
| |
| enum avdtp_parse_result { PARSE_ERROR, PARSE_FRAGMENT, PARSE_SUCCESS }; |
| |
| static enum avdtp_parse_result avdtp_parse_data(struct avdtp *session, |
| void *buf, size_t size) |
| { |
| struct avdtp_common_header *header = buf; |
| struct avdtp_single_header *single = (void *) session->buf; |
| struct avdtp_start_header *start = (void *) session->buf; |
| void *payload; |
| gsize payload_size; |
| |
| switch (header->packet_type) { |
| case AVDTP_PKT_TYPE_SINGLE: |
| if (size < sizeof(*single)) { |
| error("Received too small single packet (%zu bytes)", |
| size); |
| return PARSE_ERROR; |
| } |
| if (session->in.active) { |
| error("SINGLE: Invalid AVDTP packet fragmentation"); |
| return PARSE_ERROR; |
| } |
| |
| payload = session->buf + sizeof(*single); |
| payload_size = size - sizeof(*single); |
| |
| session->in.active = TRUE; |
| session->in.data_size = 0; |
| session->in.no_of_packets = 1; |
| session->in.transaction = header->transaction; |
| session->in.message_type = header->message_type; |
| session->in.signal_id = single->signal_id; |
| |
| break; |
| case AVDTP_PKT_TYPE_START: |
| if (size < sizeof(*start)) { |
| error("Received too small start packet (%zu bytes)", |
| size); |
| return PARSE_ERROR; |
| } |
| if (session->in.active) { |
| error("START: Invalid AVDTP packet fragmentation"); |
| return PARSE_ERROR; |
| } |
| |
| session->in.active = TRUE; |
| session->in.data_size = 0; |
| session->in.transaction = header->transaction; |
| session->in.message_type = header->message_type; |
| session->in.no_of_packets = start->no_of_packets; |
| session->in.signal_id = start->signal_id; |
| |
| payload = session->buf + sizeof(*start); |
| payload_size = size - sizeof(*start); |
| |
| break; |
| case AVDTP_PKT_TYPE_CONTINUE: |
| if (size < sizeof(struct avdtp_continue_header)) { |
| error("Received too small continue packet (%zu bytes)", |
| size); |
| return PARSE_ERROR; |
| } |
| if (!session->in.active) { |
| error("CONTINUE: Invalid AVDTP packet fragmentation"); |
| return PARSE_ERROR; |
| } |
| if (session->in.transaction != header->transaction) { |
| error("Continue transaction id doesn't match"); |
| return PARSE_ERROR; |
| } |
| if (session->in.no_of_packets <= 1) { |
| error("Too few continue packets"); |
| return PARSE_ERROR; |
| } |
| |
| payload = session->buf + sizeof(struct avdtp_continue_header); |
| payload_size = size - sizeof(struct avdtp_continue_header); |
| |
| break; |
| case AVDTP_PKT_TYPE_END: |
| if (size < sizeof(struct avdtp_continue_header)) { |
| error("Received too small end packet (%zu bytes)", |
| size); |
| return PARSE_ERROR; |
| } |
| if (!session->in.active) { |
| error("END: Invalid AVDTP packet fragmentation"); |
| return PARSE_ERROR; |
| } |
| if (session->in.transaction != header->transaction) { |
| error("End transaction id doesn't match"); |
| return PARSE_ERROR; |
| } |
| if (session->in.no_of_packets > 1) { |
| error("Got an end packet too early"); |
| return PARSE_ERROR; |
| } |
| |
| payload = session->buf + sizeof(struct avdtp_continue_header); |
| payload_size = size - sizeof(struct avdtp_continue_header); |
| |
| break; |
| default: |
| error("Invalid AVDTP packet type 0x%02X", header->packet_type); |
| return PARSE_ERROR; |
| } |
| |
| if (session->in.data_size + payload_size > |
| sizeof(session->in.buf)) { |
| error("Not enough incoming buffer space!"); |
| return PARSE_ERROR; |
| } |
| |
| memcpy(session->in.buf + session->in.data_size, payload, payload_size); |
| session->in.data_size += payload_size; |
| |
| if (session->in.no_of_packets > 1) { |
| session->in.no_of_packets--; |
| DBG("Received AVDTP fragment. %d to go", |
| session->in.no_of_packets); |
| return PARSE_FRAGMENT; |
| } |
| |
| session->in.active = FALSE; |
| |
| return PARSE_SUCCESS; |
| } |
| |
| static gboolean session_cb(GIOChannel *chan, GIOCondition cond, |
| gpointer data) |
| { |
| struct avdtp *session = data; |
| struct avdtp_common_header *header; |
| ssize_t size; |
| int fd; |
| |
| DBG(""); |
| |
| if (cond & G_IO_NVAL) { |
| session->io_id = 0; |
| |
| return FALSE; |
| } |
| |
| header = (void *) session->buf; |
| |
| if (cond & (G_IO_HUP | G_IO_ERR)) |
| goto failed; |
| |
| fd = g_io_channel_unix_get_fd(chan); |
| size = read(fd, session->buf, session->imtu); |
| if (size < 0) { |
| error("IO Channel read error"); |
| goto failed; |
| } |
| |
| if ((size_t) size < sizeof(struct avdtp_common_header)) { |
| error("Received too small packet (%zu bytes)", size); |
| goto failed; |
| } |
| |
| switch (avdtp_parse_data(session, session->buf, size)) { |
| case PARSE_ERROR: |
| goto failed; |
| case PARSE_FRAGMENT: |
| return TRUE; |
| case PARSE_SUCCESS: |
| break; |
| } |
| |
| /* Take a reference to protect against callback destroying session */ |
| avdtp_ref(session); |
| |
| if (session->in.message_type == AVDTP_MSG_TYPE_COMMAND) { |
| if (!avdtp_parse_cmd(session, session->in.transaction, |
| session->in.signal_id, |
| session->in.buf, |
| session->in.data_size)) { |
| error("Unable to handle command. Disconnecting"); |
| goto failed; |
| } |
| |
| if (session->req && session->req->collided) { |
| DBG("Collision detected"); |
| goto next; |
| } |
| |
| avdtp_unref(session); |
| return TRUE; |
| } |
| |
| if (session->req == NULL) { |
| error("No pending request, ignoring message"); |
| avdtp_unref(session); |
| return TRUE; |
| } |
| |
| if (header->transaction != session->req->transaction) { |
| error("Transaction label doesn't match"); |
| avdtp_unref(session); |
| return TRUE; |
| } |
| |
| if (session->in.signal_id != session->req->signal_id) { |
| error("Response signal doesn't match"); |
| avdtp_unref(session); |
| return TRUE; |
| } |
| |
| g_source_remove(session->req->timeout); |
| session->req->timeout = 0; |
| |
| switch (header->message_type) { |
| case AVDTP_MSG_TYPE_ACCEPT: |
| if (!avdtp_parse_resp(session, session->req->stream, |
| session->in.transaction, |
| session->in.signal_id, |
| session->in.buf, |
| session->in.data_size)) { |
| error("Unable to parse accept response"); |
| goto failed; |
| } |
| break; |
| case AVDTP_MSG_TYPE_REJECT: |
| if (!avdtp_parse_rej(session, session->req->stream, |
| session->in.transaction, |
| session->in.signal_id, |
| session->in.buf, |
| session->in.data_size)) { |
| error("Unable to parse reject response"); |
| goto failed; |
| } |
| break; |
| case AVDTP_MSG_TYPE_GEN_REJECT: |
| error("Received a General Reject message"); |
| break; |
| default: |
| error("Unknown message type 0x%02X", header->message_type); |
| break; |
| } |
| |
| next: |
| pending_req_free(session->req); |
| session->req = NULL; |
| |
| if (session->ref > 1) |
| process_queue(session); |
| |
| avdtp_unref(session); |
| |
| return TRUE; |
| |
| failed: |
| session->io_id = 0; |
| connection_lost(session, EIO); |
| |
| return FALSE; |
| } |
| |
| static int set_priority(int fd, int priority) |
| { |
| int err; |
| |
| err = setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &priority, |
| sizeof(priority)); |
| if (err == 0 || errno == ENOTSOCK) |
| return 0; |
| |
| err = -errno; |
| error("setsockopt(SO_PRIORITY): %s (%d)", strerror(-err), -err); |
| |
| return err; |
| } |
| |
| struct avdtp *avdtp_new(int fd, size_t imtu, size_t omtu, uint16_t version, |
| struct queue *lseps) |
| { |
| struct avdtp *session; |
| GIOCondition cond = G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL; |
| int new_fd; |
| |
| if (!lseps) |
| return NULL; |
| |
| new_fd = dup(fd); |
| if (new_fd < 0) { |
| error("dup(): %s (%d)", strerror(errno), errno); |
| return NULL; |
| } |
| |
| if (set_priority(new_fd, 6) < 0) |
| return NULL; |
| |
| session = g_new0(struct avdtp, 1); |
| session->io = g_io_channel_unix_new(new_fd); |
| session->version = version; |
| session->imtu = imtu; |
| session->omtu = omtu; |
| session->buf = g_malloc0(MAX(session->imtu, session->omtu)); |
| |
| /* This watch should be low priority since otherwise the |
| * connect callback might be dispatched before the session |
| * callback if the kernel wakes us up at the same time for |
| * them. This could happen if a headset is very quick in |
| * sending the Start command after connecting the stream |
| * transport channel. |
| */ |
| session->io_id = g_io_add_watch_full(session->io, G_PRIORITY_LOW, cond, |
| (GIOFunc) session_cb, session, |
| NULL); |
| |
| session->lseps = lseps; |
| |
| return avdtp_ref(session); |
| } |
| |
| unsigned int avdtp_add_disconnect_cb(struct avdtp *session, |
| avdtp_disconnect_cb_t cb, |
| void *user_data) |
| { |
| struct disconnect_callback *callback; |
| static unsigned int id = 0; |
| |
| callback = g_new0(struct disconnect_callback, 1); |
| callback->id = ++id; |
| callback->cb = cb; |
| callback->user_data = user_data; |
| session->disconnect = g_slist_append(session->disconnect, callback); |
| |
| return id; |
| } |
| |
| gboolean avdtp_remove_disconnect_cb(struct avdtp *session, unsigned int id) |
| { |
| GSList *l; |
| |
| for (l = session->disconnect; l; l = g_slist_next(l)) { |
| struct disconnect_callback *callback = l->data; |
| |
| if (callback->id != id) |
| continue; |
| |
| session->disconnect = g_slist_remove(session->disconnect, |
| callback); |
| g_free(callback); |
| return TRUE; |
| } |
| |
| return FALSE; |
| } |
| |
| void avdtp_shutdown(struct avdtp *session) |
| { |
| GSList *l; |
| bool aborting = false; |
| |
| if (!session->io) |
| return; |
| |
| for (l = session->streams; l; l = g_slist_next(l)) { |
| struct avdtp_stream *stream = l->data; |
| |
| if (stream->abort_int || |
| avdtp_close(session, stream, TRUE) == 0) |
| aborting = true; |
| } |
| |
| if (aborting) { |
| /* defer shutdown until all streams are aborted properly */ |
| session->shutdown = true; |
| } else { |
| int sock = g_io_channel_unix_get_fd(session->io); |
| |
| shutdown(sock, SHUT_RDWR); |
| } |
| } |
| |
| static void queue_request(struct avdtp *session, struct pending_req *req, |
| gboolean priority) |
| { |
| if (priority) |
| session->prio_queue = g_slist_append(session->prio_queue, req); |
| else |
| session->req_queue = g_slist_append(session->req_queue, req); |
| } |
| |
| static uint8_t req_get_seid(struct pending_req *req) |
| { |
| if (req->signal_id == AVDTP_DISCOVER) |
| return 0; |
| |
| return ((struct seid_req *) (req->data))->acp_seid; |
| } |
| |
| static int cancel_request(struct avdtp *session, int err) |
| { |
| struct pending_req *req; |
| struct seid_req sreq; |
| struct avdtp_local_sep *lsep; |
| struct avdtp_stream *stream; |
| uint8_t seid; |
| struct avdtp_error averr; |
| |
| req = session->req; |
| session->req = NULL; |
| |
| avdtp_error_init(&averr, AVDTP_ERRNO, err); |
| |
| seid = req_get_seid(req); |
| if (seid) |
| stream = find_stream_by_rseid(session, seid); |
| else |
| stream = NULL; |
| |
| if (stream) { |
| stream->abort_int = TRUE; |
| lsep = stream->lsep; |
| } else |
| lsep = NULL; |
| |
| switch (req->signal_id) { |
| case AVDTP_RECONFIGURE: |
| error("Reconfigure: %s (%d)", strerror(err), err); |
| if (lsep && lsep->cfm && lsep->cfm->reconfigure) |
| lsep->cfm->reconfigure(session, lsep, stream, &averr, |
| lsep->user_data); |
| break; |
| case AVDTP_OPEN: |
| error("Open: %s (%d)", strerror(err), err); |
| if (lsep && lsep->cfm && lsep->cfm->open) |
| lsep->cfm->open(session, lsep, stream, &averr, |
| lsep->user_data); |
| break; |
| case AVDTP_START: |
| error("Start: %s (%d)", strerror(err), err); |
| if (lsep && lsep->cfm && lsep->cfm->start) { |
| lsep->cfm->start(session, lsep, stream, &averr, |
| lsep->user_data); |
| if (stream) |
| stream->starting = FALSE; |
| } |
| break; |
| case AVDTP_SUSPEND: |
| error("Suspend: %s (%d)", strerror(err), err); |
| if (lsep && lsep->cfm && lsep->cfm->suspend) |
| lsep->cfm->suspend(session, lsep, stream, &averr, |
| lsep->user_data); |
| break; |
| case AVDTP_CLOSE: |
| error("Close: %s (%d)", strerror(err), err); |
| if (lsep && lsep->cfm && lsep->cfm->close) { |
| lsep->cfm->close(session, lsep, stream, &averr, |
| lsep->user_data); |
| if (stream) |
| stream->close_int = FALSE; |
| } |
| break; |
| case AVDTP_SET_CONFIGURATION: |
| error("SetConfiguration: %s (%d)", strerror(err), err); |
| if (lsep && lsep->cfm && lsep->cfm->set_configuration) |
| lsep->cfm->set_configuration(session, lsep, stream, |
| &averr, lsep->user_data); |
| goto failed; |
| case AVDTP_DISCOVER: |
| error("Discover: %s (%d)", strerror(err), err); |
| goto failed; |
| case AVDTP_GET_CAPABILITIES: |
| error("GetCapabilities: %s (%d)", strerror(err), err); |
| goto failed; |
| case AVDTP_ABORT: |
| error("Abort: %s (%d)", strerror(err), err); |
| goto failed; |
| } |
| |
| if (!stream) |
| goto failed; |
| |
| memset(&sreq, 0, sizeof(sreq)); |
| sreq.acp_seid = seid; |
| |
| err = send_request(session, TRUE, stream, AVDTP_ABORT, &sreq, |
| sizeof(sreq)); |
| if (err < 0) { |
| error("Unable to send abort request"); |
| goto failed; |
| } |
| |
| goto done; |
| |
| failed: |
| connection_lost(session, err); |
| done: |
| pending_req_free(req); |
| return err; |
| } |
| |
| static gboolean request_timeout(gpointer user_data) |
| { |
| struct avdtp *session = user_data; |
| |
| cancel_request(session, ETIMEDOUT); |
| |
| return FALSE; |
| } |
| |
| static int send_req(struct avdtp *session, gboolean priority, |
| struct pending_req *req) |
| { |
| static int transaction = 0; |
| int err; |
| |
| if (session->req != NULL) { |
| queue_request(session, req, priority); |
| return 0; |
| } |
| |
| req->transaction = transaction++; |
| transaction %= 16; |
| |
| /* FIXME: Should we retry to send if the buffer |
| was not totally sent or in case of EINTR? */ |
| if (!avdtp_send(session, req->transaction, AVDTP_MSG_TYPE_COMMAND, |
| req->signal_id, req->data, req->data_size)) { |
| err = -EIO; |
| goto failed; |
| } |
| |
| session->req = req; |
| |
| req->timeout = g_timeout_add_seconds(req->signal_id == AVDTP_ABORT ? |
| ABORT_TIMEOUT : REQ_TIMEOUT, |
| request_timeout, |
| session); |
| return 0; |
| |
| failed: |
| g_free(req->data); |
| g_free(req); |
| return err; |
| } |
| |
| static int send_request(struct avdtp *session, gboolean priority, |
| struct avdtp_stream *stream, uint8_t signal_id, |
| void *buffer, size_t size) |
| { |
| struct pending_req *req; |
| |
| if (size > 0 && !buffer) { |
| DBG("Invalid buffer %p", buffer); |
| return -EINVAL; |
| } |
| |
| if (stream && stream->abort_int && signal_id != AVDTP_ABORT) { |
| DBG("Unable to send requests while aborting"); |
| return -EINVAL; |
| } |
| |
| req = g_new0(struct pending_req, 1); |
| req->signal_id = signal_id; |
| req->data_size = size; |
| req->stream = stream; |
| |
| if (size > 0) { |
| req->data = g_malloc(size); |
| memcpy(req->data, buffer, size); |
| } |
| |
| return send_req(session, priority, req); |
| } |
| |
| static gboolean avdtp_discover_resp(struct avdtp *session, |
| struct discover_resp *resp, int size) |
| { |
| int sep_count, i; |
| uint8_t getcap_cmd; |
| int ret = 0; |
| gboolean getcap_pending = FALSE; |
| |
| if (session->version >= 0x0103) |
| getcap_cmd = AVDTP_GET_ALL_CAPABILITIES; |
| else |
| getcap_cmd = AVDTP_GET_CAPABILITIES; |
| |
| sep_count = size / sizeof(struct seid_info); |
| |
| for (i = 0; i < sep_count; i++) { |
| struct avdtp_remote_sep *sep; |
| struct avdtp_stream *stream; |
| struct seid_req req; |
| |
| DBG("seid %d type %d media %d in use %d", |
| resp->seps[i].seid, resp->seps[i].type, |
| resp->seps[i].media_type, resp->seps[i].inuse); |
| |
| stream = find_stream_by_rseid(session, resp->seps[i].seid); |
| |
| sep = find_remote_sep(session->seps, resp->seps[i].seid); |
| if (!sep) { |
| if (resp->seps[i].inuse && !stream) |
| continue; |
| sep = g_new0(struct avdtp_remote_sep, 1); |
| session->seps = g_slist_append(session->seps, sep); |
| } |
| |
| sep->stream = stream; |
| sep->seid = resp->seps[i].seid; |
| sep->type = resp->seps[i].type; |
| sep->media_type = resp->seps[i].media_type; |
| |
| memset(&req, 0, sizeof(req)); |
| req.acp_seid = sep->seid; |
| |
| ret = send_request(session, TRUE, NULL, getcap_cmd, |
| &req, sizeof(req)); |
| if (ret < 0) |
| break; |
| getcap_pending = TRUE; |
| } |
| |
| if (!getcap_pending) |
| finalize_discovery(session, -ret); |
| |
| return TRUE; |
| } |
| |
| static gboolean avdtp_get_capabilities_resp(struct avdtp *session, |
| struct getcap_resp *resp, |
| unsigned int size) |
| { |
| struct avdtp_remote_sep *sep; |
| uint8_t seid; |
| |
| /* Check for minimum required packet size includes: |
| * 1. getcap resp header |
| * 2. media transport capability (2 bytes) |
| * 3. media codec capability type + length (2 bytes) |
| * 4. the actual media codec elements |
| * */ |
| if (size < (sizeof(struct getcap_resp) + 4 + |
| sizeof(struct avdtp_media_codec_capability))) { |
| error("Too short getcap resp packet"); |
| return FALSE; |
| } |
| |
| seid = ((struct seid_req *) session->req->data)->acp_seid; |
| |
| sep = find_remote_sep(session->seps, seid); |
| |
| DBG("seid %d type %d media %d", sep->seid, |
| sep->type, sep->media_type); |
| |
| if (sep->caps) { |
| g_slist_free_full(sep->caps, g_free); |
| sep->caps = NULL; |
| sep->codec = NULL; |
| sep->delay_reporting = FALSE; |
| } |
| |
| sep->caps = caps_to_list(resp->caps, size - sizeof(struct getcap_resp), |
| &sep->codec, &sep->delay_reporting); |
| |
| return TRUE; |
| } |
| |
| static gboolean avdtp_set_configuration_resp(struct avdtp *session, |
| struct avdtp_stream *stream, |
| struct avdtp_single_header *resp, |
| int size) |
| { |
| struct avdtp_local_sep *sep = stream->lsep; |
| |
| avdtp_sep_set_state(session, sep, AVDTP_STATE_CONFIGURED); |
| |
| if (sep->cfm && sep->cfm->set_configuration) |
| sep->cfm->set_configuration(session, sep, stream, NULL, |
| sep->user_data); |
| |
| return TRUE; |
| } |
| |
| static gboolean avdtp_reconfigure_resp(struct avdtp *session, |
| struct avdtp_stream *stream, |
| struct avdtp_single_header *resp, |
| int size) |
| { |
| return TRUE; |
| } |
| |
| static gboolean avdtp_open_resp(struct avdtp *session, |
| struct avdtp_stream *stream, |
| struct seid_rej *resp, int size) |
| { |
| struct avdtp_local_sep *sep = stream->lsep; |
| |
| session->pending_open = stream; |
| |
| if (!stream->open_acp && sep->cfm && sep->cfm->open) |
| sep->cfm->open(session, sep, stream, NULL, sep->user_data); |
| |
| return TRUE; |
| } |
| |
| static gboolean avdtp_start_resp(struct avdtp *session, |
| struct avdtp_stream *stream, |
| struct seid_rej *resp, int size) |
| { |
| struct avdtp_local_sep *sep = stream->lsep; |
| |
| /* We might be in STREAMING already if both sides send START_CMD at the |
| * same time and the one in SNK role doesn't reject it as it should */ |
| if (sep->state != AVDTP_STATE_STREAMING) |
| avdtp_sep_set_state(session, sep, AVDTP_STATE_STREAMING); |
| |
| if (sep->cfm && sep->cfm->start) |
| sep->cfm->start(session, sep, stream, NULL, sep->user_data); |
| |
| return TRUE; |
| } |
| |
| static gboolean avdtp_close_resp(struct avdtp *session, |
| struct avdtp_stream *stream, |
| struct seid_rej *resp, int size) |
| { |
| struct avdtp_local_sep *sep = stream->lsep; |
| |
| avdtp_sep_set_state(session, sep, AVDTP_STATE_CLOSING); |
| |
| close_stream(stream); |
| |
| return TRUE; |
| } |
| |
| static gboolean avdtp_suspend_resp(struct avdtp *session, |
| struct avdtp_stream *stream, |
| void *data, int size) |
| { |
| struct avdtp_local_sep *sep = stream->lsep; |
| |
| avdtp_sep_set_state(session, sep, AVDTP_STATE_OPEN); |
| |
| if (sep->cfm && sep->cfm->suspend) |
| sep->cfm->suspend(session, sep, stream, NULL, sep->user_data); |
| |
| return TRUE; |
| } |
| |
| static gboolean avdtp_abort_resp(struct avdtp *session, |
| struct avdtp_stream *stream, |
| struct seid_rej *resp, int size) |
| { |
| struct avdtp_local_sep *sep = stream->lsep; |
| |
| avdtp_sep_set_state(session, sep, AVDTP_STATE_ABORTING); |
| |
| if (sep->cfm && sep->cfm->abort) |
| sep->cfm->abort(session, sep, stream, NULL, sep->user_data); |
| |
| avdtp_sep_set_state(session, sep, AVDTP_STATE_IDLE); |
| |
| return TRUE; |
| } |
| |
| static gboolean avdtp_delay_report_resp(struct avdtp *session, |
| struct avdtp_stream *stream, |
| void *data, int size) |
| { |
| struct avdtp_local_sep *sep = stream->lsep; |
| |
| if (sep->cfm && sep->cfm->delay_report) |
| sep->cfm->delay_report(session, sep, stream, NULL, |
| sep->user_data); |
| |
| return TRUE; |
| } |
| |
| static gboolean avdtp_parse_resp(struct avdtp *session, |
| struct avdtp_stream *stream, |
| uint8_t transaction, uint8_t signal_id, |
| void *buf, int size) |
| { |
| struct pending_req *next; |
| const char *get_all = ""; |
| |
| if (session->prio_queue) |
| next = session->prio_queue->data; |
| else if (session->req_queue) |
| next = session->req_queue->data; |
| else |
| next = NULL; |
| |
| switch (signal_id) { |
| case AVDTP_DISCOVER: |
| DBG("DISCOVER request succeeded"); |
| return avdtp_discover_resp(session, buf, size); |
| case AVDTP_GET_ALL_CAPABILITIES: |
| get_all = "ALL_"; |
| case AVDTP_GET_CAPABILITIES: |
| DBG("GET_%sCAPABILITIES request succeeded", get_all); |
| if (!avdtp_get_capabilities_resp(session, buf, size)) |
| return FALSE; |
| if (!(next && (next->signal_id == AVDTP_GET_CAPABILITIES || |
| next->signal_id == AVDTP_GET_ALL_CAPABILITIES))) |
| finalize_discovery(session, 0); |
| return TRUE; |
| } |
| |
| /* The remaining commands require an existing stream so bail out |
| * here if the stream got unexpectedly disconnected */ |
| if (!stream) { |
| DBG("AVDTP: stream was closed while waiting for reply"); |
| return TRUE; |
| } |
| |
| switch (signal_id) { |
| case AVDTP_SET_CONFIGURATION: |
| DBG("SET_CONFIGURATION request succeeded"); |
| return avdtp_set_configuration_resp(session, stream, |
| buf, size); |
| case AVDTP_RECONFIGURE: |
| DBG("RECONFIGURE request succeeded"); |
| return avdtp_reconfigure_resp(session, stream, buf, size); |
| case AVDTP_OPEN: |
| DBG("OPEN request succeeded"); |
| return avdtp_open_resp(session, stream, buf, size); |
| case AVDTP_SUSPEND: |
| DBG("SUSPEND request succeeded"); |
| return avdtp_suspend_resp(session, stream, buf, size); |
| case AVDTP_START: |
| DBG("START request succeeded"); |
| return avdtp_start_resp(session, stream, buf, size); |
| case AVDTP_CLOSE: |
| DBG("CLOSE request succeeded"); |
| return avdtp_close_resp(session, stream, buf, size); |
| case AVDTP_ABORT: |
| DBG("ABORT request succeeded"); |
| return avdtp_abort_resp(session, stream, buf, size); |
| case AVDTP_DELAY_REPORT: |
| DBG("DELAY_REPORT request succeeded"); |
| return avdtp_delay_report_resp(session, stream, buf, size); |
| } |
| |
| error("Unknown signal id in accept response: %u", signal_id); |
| return TRUE; |
| } |
| |
| static gboolean seid_rej_to_err(struct seid_rej *rej, unsigned int size, |
| struct avdtp_error *err) |
| { |
| if (size < sizeof(struct seid_rej)) { |
| error("Too small packet for seid_rej"); |
| return FALSE; |
| } |
| |
| avdtp_error_init(err, 0x00, rej->error); |
| |
| return TRUE; |
| } |
| |
| static gboolean conf_rej_to_err(struct conf_rej *rej, unsigned int size, |
| struct avdtp_error *err) |
| { |
| if (size < sizeof(struct conf_rej)) { |
| error("Too small packet for conf_rej"); |
| return FALSE; |
| } |
| |
| avdtp_error_init(err, rej->category, rej->error); |
| |
| return TRUE; |
| } |
| |
| static gboolean stream_rej_to_err(struct stream_rej *rej, unsigned int size, |
| struct avdtp_error *err, |
| uint8_t *acp_seid) |
| { |
| if (size < sizeof(struct stream_rej)) { |
| error("Too small packet for stream_rej"); |
| return FALSE; |
| } |
| |
| avdtp_error_init(err, 0x00, rej->error); |
| |
| if (acp_seid) |
| *acp_seid = rej->acp_seid; |
| |
| return TRUE; |
| } |
| |
| static gboolean avdtp_parse_rej(struct avdtp *session, |
| struct avdtp_stream *stream, |
| uint8_t transaction, uint8_t signal_id, |
| void *buf, int size) |
| { |
| struct avdtp_error err; |
| uint8_t acp_seid; |
| struct avdtp_local_sep *sep = stream ? stream->lsep : NULL; |
| |
| switch (signal_id) { |
| case AVDTP_DISCOVER: |
| case AVDTP_GET_CAPABILITIES: |
| case AVDTP_GET_ALL_CAPABILITIES: |
| if (!seid_rej_to_err(buf, size, &err)) |
| return FALSE; |
| error("%s request rejected: %s (%d)", |
| signal_id == AVDTP_DISCOVER ? "DISCOVER" : |
| signal_id == AVDTP_GET_CAPABILITIES ? |
| "GET_CAPABILITIES" : "GET_ALL_CAPABILITIES", |
| avdtp_strerror(&err), err.err.error_code); |
| if (session->discover) { |
| session->discover->cb(session, session->seps, &err, |
| session->discover->user_data); |
| g_free(session->discover); |
| session->discover = NULL; |
| } |
| return TRUE; |
| case AVDTP_OPEN: |
| if (!seid_rej_to_err(buf, size, &err)) |
| return FALSE; |
| error("OPEN request rejected: %s (%d)", |
| avdtp_strerror(&err), err.err.error_code); |
| if (sep && sep->cfm && sep->cfm->open) |
| sep->cfm->open(session, sep, stream, &err, |
| sep->user_data); |
| return TRUE; |
| case AVDTP_SET_CONFIGURATION: |
| if (!conf_rej_to_err(buf, size, &err)) |
| return FALSE; |
| error("SET_CONFIGURATION request rejected: %s (%d)", |
| avdtp_strerror(&err), err.err.error_code); |
| if (sep && sep->cfm && sep->cfm->set_configuration) |
| sep->cfm->set_configuration(session, sep, stream, |
| &err, sep->user_data); |
| return TRUE; |
| case AVDTP_GET_CONFIGURATION: |
| if (!seid_rej_to_err(buf, size, &err)) |
| return FALSE; |
| error("GET_CONFIGURATION request rejected: %s (%d)", |
| avdtp_strerror(&err), err.err.error_code); |
| if (sep && sep->cfm && sep->cfm->get_configuration) |
| sep->cfm->get_configuration(session, sep, stream, &err, |
| sep->user_data); |
| return TRUE; |
| case AVDTP_RECONFIGURE: |
| if (!conf_rej_to_err(buf, size, &err)) |
| return FALSE; |
| error("RECONFIGURE request rejected: %s (%d)", |
| avdtp_strerror(&err), err.err.error_code); |
| if (sep && sep->cfm && sep->cfm->reconfigure) |
| sep->cfm->reconfigure(session, sep, stream, &err, |
| sep->user_data); |
| return TRUE; |
| case AVDTP_START: |
| if (!stream_rej_to_err(buf, size, &err, &acp_seid)) |
| return FALSE; |
| error("START request rejected: %s (%d)", |
| avdtp_strerror(&err), err.err.error_code); |
| if (sep && sep->cfm && sep->cfm->start) { |
| stream->starting = FALSE; |
| sep->cfm->start(session, sep, stream, &err, |
| sep->user_data); |
| } |
| return TRUE; |
| case AVDTP_SUSPEND: |
| if (!stream_rej_to_err(buf, size, &err, &acp_seid)) |
| return FALSE; |
| error("SUSPEND request rejected: %s (%d)", |
| avdtp_strerror(&err), err.err.error_code); |
| if (sep && sep->cfm && sep->cfm->suspend) |
| sep->cfm->suspend(session, sep, stream, &err, |
| sep->user_data); |
| return TRUE; |
| case AVDTP_CLOSE: |
| if (!stream_rej_to_err(buf, size, &err, &acp_seid)) |
| return FALSE; |
| error("CLOSE request rejected: %s (%d)", |
| avdtp_strerror(&err), err.err.error_code); |
| if (sep && sep->cfm && sep->cfm->close) { |
| sep->cfm->close(session, sep, stream, &err, |
| sep->user_data); |
| stream->close_int = FALSE; |
| } |
| return TRUE; |
| case AVDTP_ABORT: |
| if (!stream_rej_to_err(buf, size, &err, &acp_seid)) |
| return FALSE; |
| error("ABORT request rejected: %s (%d)", |
| avdtp_strerror(&err), err.err.error_code); |
| if (sep && sep->cfm && sep->cfm->abort) |
| sep->cfm->abort(session, sep, stream, &err, |
| sep->user_data); |
| return FALSE; |
| case AVDTP_DELAY_REPORT: |
| if (!stream_rej_to_err(buf, size, &err, &acp_seid)) |
| return FALSE; |
| error("DELAY_REPORT request rejected: %s (%d)", |
| avdtp_strerror(&err), err.err.error_code); |
| if (sep && sep->cfm && sep->cfm->delay_report) |
| sep->cfm->delay_report(session, sep, stream, &err, |
| sep->user_data); |
| return TRUE; |
| default: |
| error("Unknown reject response signal id: %u", signal_id); |
| return TRUE; |
| } |
| } |
| |
| struct avdtp_service_capability *avdtp_stream_get_codec( |
| struct avdtp_stream *stream) |
| { |
| GSList *l; |
| |
| for (l = stream->caps; l; l = l->next) { |
| struct avdtp_service_capability *cap = l->data; |
| |
| if (cap->category == AVDTP_MEDIA_CODEC) |
| return cap; |
| } |
| |
| return NULL; |
| } |
| |
| static gboolean avdtp_stream_has_capability(struct avdtp_stream *stream, |
| struct avdtp_service_capability *cap) |
| { |
| GSList *l; |
| struct avdtp_service_capability *stream_cap; |
| |
| for (l = stream->caps; l; l = g_slist_next(l)) { |
| stream_cap = l->data; |
| |
| if (stream_cap->category != cap->category || |
| stream_cap->length != cap->length) |
| continue; |
| |
| if (memcmp(stream_cap->data, cap->data, cap->length) == 0) |
| return TRUE; |
| } |
| |
| return FALSE; |
| } |
| |
| gboolean avdtp_stream_has_capabilities(struct avdtp_stream *stream, |
| GSList *caps) |
| { |
| for (; caps; caps = g_slist_next(caps)) { |
| struct avdtp_service_capability *cap = caps->data; |
| |
| if (!avdtp_stream_has_capability(stream, cap)) |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| struct avdtp_remote_sep *avdtp_stream_get_remote_sep( |
| struct avdtp_stream *stream) |
| { |
| GSList *l; |
| |
| for (l = stream->session->seps; l; l = l->next) { |
| struct avdtp_remote_sep *sep = l->data; |
| |
| if (sep->seid == stream->rseid) |
| return sep; |
| } |
| |
| return NULL; |
| } |
| |
| gboolean avdtp_stream_set_transport(struct avdtp_stream *stream, int fd, |
| size_t imtu, size_t omtu) |
| { |
| GIOChannel *io; |
| |
| if (stream != stream->session->pending_open) |
| return FALSE; |
| |
| if (set_priority(fd, 5) < 0) |
| return FALSE; |
| |
| io = g_io_channel_unix_new(fd); |
| |
| handle_transport_connect(stream->session, io, imtu, omtu); |
| |
| g_io_channel_unref(io); |
| |
| return TRUE; |
| } |
| |
| gboolean avdtp_stream_get_transport(struct avdtp_stream *stream, int *sock, |
| uint16_t *imtu, uint16_t *omtu, |
| GSList **caps) |
| { |
| if (stream->io == NULL) |
| return FALSE; |
| |
| if (sock) |
| *sock = g_io_channel_unix_get_fd(stream->io); |
| |
| if (omtu) |
| *omtu = stream->omtu; |
| |
| if (imtu) |
| *imtu = stream->imtu; |
| |
| if (caps) |
| *caps = stream->caps; |
| |
| return TRUE; |
| } |
| |
| static int process_queue(struct avdtp *session) |
| { |
| GSList **queue, *l; |
| struct pending_req *req; |
| |
| if (session->req) |
| return 0; |
| |
| if (session->prio_queue) |
| queue = &session->prio_queue; |
| else |
| queue = &session->req_queue; |
| |
| if (!*queue) |
| return 0; |
| |
| l = *queue; |
| req = l->data; |
| |
| *queue = g_slist_remove(*queue, req); |
| |
| return send_req(session, FALSE, req); |
| } |
| |
| struct avdtp_service_capability *avdtp_get_codec(struct avdtp_remote_sep *sep) |
| { |
| return sep->codec; |
| } |
| |
| struct avdtp_service_capability *avdtp_service_cap_new(uint8_t category, |
| const void *data, |
| int length) |
| { |
| struct avdtp_service_capability *cap; |
| |
| if (category < AVDTP_MEDIA_TRANSPORT || |
| category > AVDTP_DELAY_REPORTING) |
| return NULL; |
| |
| if (length > 0 && !data) |
| return NULL; |
| |
| cap = g_malloc(sizeof(struct avdtp_service_capability) + length); |
| cap->category = category; |
| cap->length = length; |
| |
| if (length > 0) |
| memcpy(cap->data, data, length); |
| |
| return cap; |
| } |
| |
| static gboolean process_discover(gpointer data) |
| { |
| struct avdtp *session = data; |
| |
| session->discover->id = 0; |
| |
| finalize_discovery(session, 0); |
| |
| return FALSE; |
| } |
| |
| int avdtp_discover(struct avdtp *session, avdtp_discover_cb_t cb, |
| void *user_data) |
| { |
| int err; |
| |
| if (session->discover) |
| return -EBUSY; |
| |
| session->discover = g_new0(struct discover_callback, 1); |
| |
| if (session->seps) { |
| session->discover->cb = cb; |
| session->discover->user_data = user_data; |
| session->discover->id = g_idle_add(process_discover, session); |
| return 0; |
| } |
| |
| err = send_request(session, FALSE, NULL, AVDTP_DISCOVER, NULL, 0); |
| if (err == 0) { |
| session->discover->cb = cb; |
| session->discover->user_data = user_data; |
| } |
| |
| return err; |
| } |
| |
| gboolean avdtp_stream_remove_cb(struct avdtp *session, |
| struct avdtp_stream *stream, |
| unsigned int id) |
| { |
| GSList *l; |
| struct stream_callback *cb; |
| |
| if (!stream) |
| return FALSE; |
| |
| for (cb = NULL, l = stream->callbacks; l != NULL; l = l->next) { |
| struct stream_callback *tmp = l->data; |
|