Diff: BTstack/rfcomm.h

Revision:

0:1ed23ab1345f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BTstack/rfcomm.h	Tue Jun 26 14:27:45 2012 +0000
@@ -0,0 +1,304 @@
+/*
+ * Copyright (C) 2009-2012 by Matthias Ringwald
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ * 4. Any redistribution, use, or modification is done solely for
+ *    personal benefit and not for any commercial purpose or for
+ *    monetary gain.
+ *
+ * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
+ * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+ * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * Please inquire about commercial licensing options at btstack@ringwald.ch
+ *
+ */
+
+/*
+ *  RFCOMM.h
+ */
+
+#include <btstack/btstack.h>
+#include <btstack/utils.h>
+
+#include <stdint.h>
+
+#if defined __cplusplus
+extern "C" {
+#endif
+    
+void rfcomm_init(void);
+
+// register packet handler
+void rfcomm_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
+void rfcomm_register_packet_handler(void (*handler)(void * connection, uint8_t packet_type,
+                                                    uint16_t channel, uint8_t *packet, uint16_t size));
+
+// BTstack Internal RFCOMM API
+void rfcomm_create_channel_internal(void * connection, bd_addr_t *addr, uint8_t channel);
+void rfcomm_create_channel_with_initial_credits_internal(void * connection, bd_addr_t *addr, uint8_t server_channel, uint8_t initial_credits);
+void rfcomm_disconnect_internal(uint16_t rfcomm_cid);
+void rfcomm_register_service_internal(void * connection, uint8_t channel, uint16_t max_frame_size);
+void rfcomm_register_service_with_initial_credits_internal(void * connection, uint8_t channel, uint16_t max_frame_size, uint8_t initial_credits);
+void rfcomm_unregister_service_internal(uint8_t service_channel);
+void rfcomm_accept_connection_internal(uint16_t rfcomm_cid);
+void rfcomm_decline_connection_internal(uint16_t rfcomm_cid);
+void rfcomm_grant_credits(uint16_t rfcomm_cid, uint8_t credits);
+int  rfcomm_send_internal(uint16_t rfcomm_cid, uint8_t *data, uint16_t len);
+void rfcomm_close_connection(void *connection);
+
+#define UNLIMITED_INCOMING_CREDITS 0xff
+
+// private structs
+typedef enum {
+    RFCOMM_MULTIPLEXER_CLOSED = 1,
+    RFCOMM_MULTIPLEXER_W4_CONNECT,  // outgoing
+    RFCOMM_MULTIPLEXER_SEND_SABM_0,     //    "
+    RFCOMM_MULTIPLEXER_W4_UA_0,     //    "
+    RFCOMM_MULTIPLEXER_W4_SABM_0,   // incoming
+    RFCOMM_MULTIPLEXER_SEND_UA_0,
+    RFCOMM_MULTIPLEXER_OPEN,
+    RFCOMM_MULTIPLEXER_SEND_UA_0_AND_DISC
+} RFCOMM_MULTIPLEXER_STATE;
+
+typedef enum {
+    MULT_EV_READY_TO_SEND = 1,
+    
+} RFCOMM_MULTIPLEXER_EVENT;
+
+typedef enum {
+    RFCOMM_CHANNEL_CLOSED = 1,
+    RFCOMM_CHANNEL_W4_MULTIPLEXER,
+    RFCOMM_CHANNEL_SEND_UIH_PN,
+    RFCOMM_CHANNEL_W4_PN_RSP,
+    RFCOMM_CHANNEL_SEND_SABM_W4_UA,
+    RFCOMM_CHANNEL_W4_UA,
+    RFCOMM_CHANNEL_INCOMING_SETUP,
+    RFCOMM_CHANNEL_DLC_SETUP,
+    RFCOMM_CHANNEL_OPEN,
+    RFCOMM_CHANNEL_SEND_UA_AFTER_DISC,
+    RFCOMM_CHANNEL_SEND_DISC,
+    RFCOMM_CHANNEL_SEND_DM,
+    
+} RFCOMM_CHANNEL_STATE;
+
+/*
+typedef enum {
+    RFCOMM_CHANNEL_STATE_VAR_NONE            = 0,
+    RFCOMM_CHANNEL_STATE_VAR_CLIENT_ACCEPTED = 1 << 0,
+    RFCOMM_CHANNEL_STATE_VAR_RCVD_PN         = 1 << 1,
+    RFCOMM_CHANNEL_STATE_VAR_RCVD_RPN        = 1 << 2,
+    RFCOMM_CHANNEL_STATE_VAR_RCVD_SABM       = 1 << 3,
+    
+    RFCOMM_CHANNEL_STATE_VAR_RCVD_MSC_CMD    = 1 << 4,
+    RFCOMM_CHANNEL_STATE_VAR_RCVD_MSC_RSP    = 1 << 5,
+    RFCOMM_CHANNEL_STATE_VAR_SEND_PN_RSP     = 1 << 6,
+    RFCOMM_CHANNEL_STATE_VAR_SEND_RPN_INFO   = 1 << 7,
+    
+    RFCOMM_CHANNEL_STATE_VAR_SEND_RPN_RSP    = 1 << 8,
+    RFCOMM_CHANNEL_STATE_VAR_SEND_UA         = 1 << 9,
+    RFCOMM_CHANNEL_STATE_VAR_SEND_MSC_CMD    = 1 << 10,
+    RFCOMM_CHANNEL_STATE_VAR_SEND_MSC_RSP    = 1 << 11,
+    
+    RFCOMM_CHANNEL_STATE_VAR_SEND_CREDITS    = 1 << 12,
+    RFCOMM_CHANNEL_STATE_VAR_SENT_MSC_CMD    = 1 << 13,
+    RFCOMM_CHANNEL_STATE_VAR_SENT_MSC_RSP    = 1 << 14,
+    RFCOMM_CHANNEL_STATE_VAR_SENT_CREDITS    = 1 << 15,
+} RFCOMM_CHANNEL_STATE_VAR;
+*/
+
+enum {
+    RFCOMM_CHANNEL_STATE_VAR_NONE            = 0,
+    RFCOMM_CHANNEL_STATE_VAR_CLIENT_ACCEPTED = 1 << 0,
+    RFCOMM_CHANNEL_STATE_VAR_RCVD_PN         = 1 << 1,
+    RFCOMM_CHANNEL_STATE_VAR_RCVD_RPN        = 1 << 2,
+    RFCOMM_CHANNEL_STATE_VAR_RCVD_SABM       = 1 << 3,
+    
+    RFCOMM_CHANNEL_STATE_VAR_RCVD_MSC_CMD    = 1 << 4,
+    RFCOMM_CHANNEL_STATE_VAR_RCVD_MSC_RSP    = 1 << 5,
+    RFCOMM_CHANNEL_STATE_VAR_SEND_PN_RSP     = 1 << 6,
+    RFCOMM_CHANNEL_STATE_VAR_SEND_RPN_INFO   = 1 << 7,
+    
+    RFCOMM_CHANNEL_STATE_VAR_SEND_RPN_RSP    = 1 << 8,
+    RFCOMM_CHANNEL_STATE_VAR_SEND_UA         = 1 << 9,
+    RFCOMM_CHANNEL_STATE_VAR_SEND_MSC_CMD    = 1 << 10,
+    RFCOMM_CHANNEL_STATE_VAR_SEND_MSC_RSP    = 1 << 11,
+    
+    RFCOMM_CHANNEL_STATE_VAR_SEND_CREDITS    = 1 << 12,
+    RFCOMM_CHANNEL_STATE_VAR_SENT_MSC_CMD    = 1 << 13,
+    RFCOMM_CHANNEL_STATE_VAR_SENT_MSC_RSP    = 1 << 14,
+    RFCOMM_CHANNEL_STATE_VAR_SENT_CREDITS    = 1 << 15,
+};
+typedef uint16_t RFCOMM_CHANNEL_STATE_VAR;
+
+typedef enum {
+    CH_EVT_RCVD_SABM = 1,
+    CH_EVT_RCVD_UA,
+    CH_EVT_RCVD_PN,
+    CH_EVT_RCVD_PN_RSP,
+    CH_EVT_RCVD_DISC,
+    CH_EVT_RCVD_DM,
+    CH_EVT_RCVD_MSC_CMD,
+    CH_EVT_RCVD_MSC_RSP,
+    CH_EVT_RCVD_RPN_CMD,
+    CH_EVT_RCVD_RPN_REQ,
+    CH_EVT_RCVD_CREDITS,
+    CH_EVT_MULTIPLEXER_READY,
+    CH_EVT_READY_TO_SEND,
+} RFCOMM_CHANNEL_EVENT;
+
+typedef struct rfcomm_channel_event {
+    RFCOMM_CHANNEL_EVENT type;
+} rfcomm_channel_event_t;
+
+typedef struct rfcomm_channel_event_pn {
+    rfcomm_channel_event_t super;
+    uint16_t max_frame_size;
+    uint8_t  priority;
+    uint8_t  credits_outgoing;
+} rfcomm_channel_event_pn_t;
+
+typedef struct rfcomm_rpn_data {
+    uint8_t baud_rate;
+    uint8_t flags;
+    uint8_t flow_control;
+    uint8_t xon;
+    uint8_t xoff;
+    uint8_t parameter_mask_0;   // first byte
+    uint8_t parameter_mask_1;   // second byte
+} rfcomm_rpn_data_t;
+
+typedef struct rfcomm_channel_event_rpn {
+    rfcomm_channel_event_t super;
+    rfcomm_rpn_data_t data;
+} rfcomm_channel_event_rpn_t;
+
+// info regarding potential connections
+typedef struct {
+    // linked list - assert: first field
+    linked_item_t    item;
+    
+    // server channel
+    uint8_t server_channel;
+    
+    // incoming max frame size
+    uint16_t max_frame_size;
+
+    // use incoming flow control
+    uint8_t incoming_flow_control;
+    
+    // initial incoming credits
+    uint8_t incoming_initial_credits;
+    
+    // client connection
+    void *connection;    
+    
+    // internal connection
+    btstack_packet_handler_t packet_handler;
+    
+} rfcomm_service_t;
+
+// info regarding multiplexer
+// note: spec mandates single multplexer per device combination
+typedef struct {
+    // linked list - assert: first field
+    linked_item_t    item;
+    
+    timer_source_t   timer;
+    int              timer_active;
+    
+    RFCOMM_MULTIPLEXER_STATE state;    
+    
+    uint16_t  l2cap_cid;
+    uint8_t   l2cap_credits;
+    
+    bd_addr_t remote_addr;
+    hci_con_handle_t con_handle;
+    
+    uint8_t   outgoing;
+    
+    // hack to deal with authentication failure only observed by remote side
+    uint8_t   at_least_one_connection;
+    
+    uint16_t max_frame_size;
+    
+    // send DM for DLCI != 0
+    uint8_t send_dm_for_dlci;
+    
+} rfcomm_multiplexer_t;
+
+// info regarding an actual coneection
+typedef struct {
+    // linked list - assert: first field
+    linked_item_t    item;
+    
+    rfcomm_multiplexer_t *multiplexer;
+    uint16_t rfcomm_cid;
+    uint8_t  outgoing;
+    uint8_t  dlci; 
+    
+    // number of packets granted to client
+    uint8_t packets_granted;
+
+    // credits for outgoing traffic
+    uint8_t credits_outgoing;
+    
+    // number of packets remote will be granted
+    uint8_t new_credits_incoming;
+
+    // credits for incoming traffic
+    uint8_t credits_incoming;
+    
+    // use incoming flow control
+    uint8_t incoming_flow_control;
+    
+    // channel state
+    RFCOMM_CHANNEL_STATE state;
+    
+    // state variables used in RFCOMM_CHANNEL_INCOMING
+    RFCOMM_CHANNEL_STATE_VAR state_var;
+    
+    // priority set by incoming side in PN
+    uint8_t pn_priority;
+    
+    // negotiated frame size
+    uint16_t max_frame_size;
+    
+    // rpn data
+    rfcomm_rpn_data_t rpn_data;
+    
+    // server channel (see rfcomm_service_t) - NULL => outgoing channel
+    rfcomm_service_t * service;
+    
+    // internal connection
+    btstack_packet_handler_t packet_handler;
+    
+    // client connection
+    void * connection;
+    
+} rfcomm_channel_t;
+
+
+#if defined __cplusplus
+}
+#endif