Initial Bluedroid stack commit

1 files changed, 453 insertions, 0 deletions

diff --git a/stack/rfcomm/rfc_utils.c b/stack/rfcomm/rfc_utils.c
new file mode 100644
index 0000000..9395891
--- /dev/null
+++ b/stack/rfcomm/rfc_utils.c
@@ -0,0 +1,453 @@
+/*****************************************************************************/
+/*                                                                           */
+/*  Name:          rfc_utils.c                                               */
+/*                                                                           */
+/*  Description:   This file contains collection of utility functions used   */
+/*                 the RFCOMM unit                                           */
+/*                                                                           */
+/*  Copyright (c) 1999-2008, Broadcom Corp., All Rights Reserved.            */
+/*  WIDCOMM Bluetooth Core. Proprietary and confidential.                    */
+/*****************************************************************************/
+#include "bt_target.h"
+#include "gki.h"
+
+#include "btm_api.h"
+#include "btm_int.h"
+#include "rfcdefs.h"
+#include "port_api.h"
+#include "port_ext.h"
+#include "port_int.h"
+#include "rfc_int.h"
+#include "btu.h"
+
+#include <string.h>
+
+/*******************************************************************************
+**
+** Function         rfc_calc_fcs
+**
+** Description      Reversed CRC Table , 8-bit, poly=0x07
+**                  (GSM 07.10 TS 101 369 V6.3.0)
+*******************************************************************************/
+static const UINT8 rfc_crctable[] = 
+{
+    0x00, 0x91, 0xE3, 0x72, 0x07, 0x96, 0xE4, 0x75,  0x0E, 0x9F, 0xED, 0x7C, 0x09, 0x98, 0xEA, 0x7B,
+    0x1C, 0x8D, 0xFF, 0x6E, 0x1B, 0x8A, 0xF8, 0x69,  0x12, 0x83, 0xF1, 0x60, 0x15, 0x84, 0xF6, 0x67,
+    0x38, 0xA9, 0xDB, 0x4A, 0x3F, 0xAE, 0xDC, 0x4D,  0x36, 0xA7, 0xD5, 0x44, 0x31, 0xA0, 0xD2, 0x43,
+    0x24, 0xB5, 0xC7, 0x56, 0x23, 0xB2, 0xC0, 0x51,  0x2A, 0xBB, 0xC9, 0x58, 0x2D, 0xBC, 0xCE, 0x5F,
+
+    0x70, 0xE1, 0x93, 0x02, 0x77, 0xE6, 0x94, 0x05,  0x7E, 0xEF, 0x9D, 0x0C, 0x79, 0xE8, 0x9A, 0x0B,
+    0x6C, 0xFD, 0x8F, 0x1E, 0x6B, 0xFA, 0x88, 0x19,  0x62, 0xF3, 0x81, 0x10, 0x65, 0xF4, 0x86, 0x17,
+    0x48, 0xD9, 0xAB, 0x3A, 0x4F, 0xDE, 0xAC, 0x3D,  0x46, 0xD7, 0xA5, 0x34, 0x41, 0xD0, 0xA2, 0x33,
+    0x54, 0xC5, 0xB7, 0x26, 0x53, 0xC2, 0xB0, 0x21,  0x5A, 0xCB, 0xB9, 0x28, 0x5D, 0xCC, 0xBE, 0x2F,
+
+    0xE0, 0x71, 0x03, 0x92, 0xE7, 0x76, 0x04, 0x95,  0xEE, 0x7F, 0x0D, 0x9C, 0xE9, 0x78, 0x0A, 0x9B,
+    0xFC, 0x6D, 0x1F, 0x8E, 0xFB, 0x6A, 0x18, 0x89,  0xF2, 0x63, 0x11, 0x80, 0xF5, 0x64, 0x16, 0x87,
+    0xD8, 0x49, 0x3B, 0xAA, 0xDF, 0x4E, 0x3C, 0xAD,  0xD6, 0x47, 0x35, 0xA4, 0xD1, 0x40, 0x32, 0xA3,
+    0xC4, 0x55, 0x27, 0xB6, 0xC3, 0x52, 0x20, 0xB1,  0xCA, 0x5B, 0x29, 0xB8, 0xCD, 0x5C, 0x2E, 0xBF,
+
+    0x90, 0x01, 0x73, 0xE2, 0x97, 0x06, 0x74, 0xE5,  0x9E, 0x0F, 0x7D, 0xEC, 0x99, 0x08, 0x7A, 0xEB,
+    0x8C, 0x1D, 0x6F, 0xFE, 0x8B, 0x1A, 0x68, 0xF9,  0x82, 0x13, 0x61, 0xF0, 0x85, 0x14, 0x66, 0xF7,
+    0xA8, 0x39, 0x4B, 0xDA, 0xAF, 0x3E, 0x4C, 0xDD,  0xA6, 0x37, 0x45, 0xD4, 0xA1, 0x30, 0x42, 0xD3,
+    0xB4, 0x25, 0x57, 0xC6, 0xB3, 0x22, 0x50, 0xC1,  0xBA, 0x2B, 0x59, 0xC8, 0xBD, 0x2C, 0x5E, 0xCF
+};
+
+
+/*******************************************************************************
+**
+** Function         rfc_calc_fcs
+**
+** Description      This function calculate FCS for the RFCOMM frame 
+**                  (GSM 07.10 TS 101 369 V6.3.0)
+**
+** Input            len - number of bytes in the message
+**                  p   - points to message
+**
+*******************************************************************************/
+UINT8 rfc_calc_fcs (UINT16 len, UINT8 *p)
+{
+    UINT8  fcs = 0xFF;
+
+    while (len--)
+    {
+        fcs = rfc_crctable[fcs ^ *p++];
+    }
+
+    /* Ones compliment */
+    return (0xFF - fcs);
+}
+
+
+/*******************************************************************************
+**
+** Function         rfc_check_fcs
+**
+** Description      This function checks FCS for the RFCOMM frame 
+**                  (GSM 07.10 TS 101 369 V6.3.0)
+**
+** Input            len          - number of bytes in the message
+**                  p            - points to message
+**                  received_fcs - received FCS
+**
+*******************************************************************************/
+BOOLEAN rfc_check_fcs (UINT16 len, UINT8 *p, UINT8 received_fcs)
+{
+    UINT8  fcs = 0xFF;
+
+    while (len--)
+    {
+        fcs = rfc_crctable[fcs ^ *p++];
+    }
+
+    /* Ones compliment */
+    fcs = rfc_crctable[fcs ^ received_fcs];
+
+    /*0xCF is the reversed order of 11110011.*/
+    return (fcs == 0xCF);
+}
+
+
+/*******************************************************************************
+**
+** Function         rfc_alloc_multiplexer_channel
+**
+** Description      This function returns existing or new control block for
+**                  the BD_ADDR.
+**
+*******************************************************************************/
+tRFC_MCB *rfc_alloc_multiplexer_channel (BD_ADDR bd_addr, BOOLEAN is_initiator)
+{
+    int i, j;
+    tRFC_MCB *p_mcb = NULL;
+
+    for (i = 0; i < MAX_BD_CONNECTIONS; i++)
+    {
+        if ((rfc_cb.port.rfc_mcb[i].state != RFC_MX_STATE_IDLE)
+         && (!memcmp (rfc_cb.port.rfc_mcb[i].bd_addr, bd_addr, BD_ADDR_LEN)))
+        {
+            /* Multiplexer channel found do not change anything */
+            /* If there was an inactivity timer running stop it now */
+            if (rfc_cb.port.rfc_mcb[i].state == RFC_MX_STATE_CONNECTED)
+                rfc_timer_stop (&rfc_cb.port.rfc_mcb[i]);
+            return (&rfc_cb.port.rfc_mcb[i]);
+        }
+    }
+
+    /* connection with bd_addr does not exist */
+    for (i = 0, j = rfc_cb.rfc.last_mux + 1; i < MAX_BD_CONNECTIONS; i++, j++)
+    {
+        if (j >= MAX_BD_CONNECTIONS)
+            j = 0;
+
+        p_mcb = &rfc_cb.port.rfc_mcb[j];
+        if (rfc_cb.port.rfc_mcb[j].state == RFC_MX_STATE_IDLE)
+        {
+            /* New multiplexer control block */
+            memset (p_mcb, 0, sizeof (tRFC_MCB));
+            memcpy (p_mcb->bd_addr, bd_addr, BD_ADDR_LEN);
+
+            GKI_init_q(&p_mcb->cmd_q);
+
+            p_mcb->is_initiator = is_initiator;
+
+            rfc_timer_start (p_mcb, RFC_MCB_INIT_INACT_TIMER);
+
+            rfc_cb.rfc.last_mux = (UINT8) j;
+            return (p_mcb);
+        }
+    }
+    return (NULL);
+}
+
+
+/*******************************************************************************
+**
+** Function         rfc_release_multiplexer_channel
+**
+** Description      This function returns existing or new control block for
+**                  the BD_ADDR.
+**
+*******************************************************************************/
+void rfc_release_multiplexer_channel (tRFC_MCB *p_mcb)
+{
+    void    *p_buf;
+
+    rfc_timer_stop (p_mcb);
+
+    while ((p_buf = GKI_dequeue(&p_mcb->cmd_q)) != NULL)
+        GKI_freebuf(p_buf);
+
+    memset (p_mcb, 0, sizeof (tRFC_MCB));
+    p_mcb->state = RFC_MX_STATE_IDLE;
+}
+
+
+/*******************************************************************************
+**
+** Function         rfc_timer_start
+**
+** Description      Start RFC Timer
+**
+*******************************************************************************/
+void rfc_timer_start (tRFC_MCB *p_mcb, UINT16 timeout)
+{
+    TIMER_LIST_ENT *p_tle = &p_mcb->tle;
+    
+    RFCOMM_TRACE_EVENT1 ("rfc_timer_start - timeout:%d", timeout);
+
+    p_tle->param = (UINT32)p_mcb;
+
+    btu_start_timer (p_tle, BTU_TTYPE_RFCOMM_MFC, timeout);
+}
+
+
+/*******************************************************************************
+**
+** Function         rfc_timer_stop
+**
+** Description      Stop RFC Timer 
+**
+*******************************************************************************/
+void rfc_timer_stop (tRFC_MCB *p_mcb)
+{
+    RFCOMM_TRACE_EVENT0 ("rfc_timer_stop");
+
+    btu_stop_timer (&p_mcb->tle);
+}
+
+
+/*******************************************************************************
+**
+** Function         rfc_port_timer_start
+**
+** Description      Start RFC Timer
+**
+*******************************************************************************/
+void rfc_port_timer_start (tPORT *p_port, UINT16 timeout)
+{
+    TIMER_LIST_ENT *p_tle = &p_port->rfc.tle;
+
+    RFCOMM_TRACE_EVENT1 ("rfc_port_timer_start - timeout:%d", timeout);
+
+    p_tle->param = (UINT32)p_port;
+
+    btu_start_timer (p_tle, BTU_TTYPE_RFCOMM_PORT, timeout);
+}
+
+
+/*******************************************************************************
+**
+** Function         rfc_port_timer_stop
+**
+** Description      Stop RFC Timer 
+**
+*******************************************************************************/
+void rfc_port_timer_stop (tPORT *p_port)
+{
+    RFCOMM_TRACE_EVENT0 ("rfc_port_timer_stop");
+
+    btu_stop_timer (&p_port->rfc.tle);
+}
+
+
+/*******************************************************************************
+**
+** Function         rfc_check_mcb_active
+**
+** Description      Check if there are any opened ports on the MCB if not
+**                  start MCB Inact timer.
+**
+** Returns          void
+**
+*******************************************************************************/
+void rfc_check_mcb_active (tRFC_MCB *p_mcb)
+{
+    UINT16 i;
+
+    for (i = 0; i < RFCOMM_MAX_DLCI; i++)
+    {
+        if (p_mcb->port_inx[i] != 0)
+        {
+            p_mcb->is_disc_initiator = FALSE;
+            return;
+        }
+    }
+    /* The last port was DISCed.  On the client side start disconnecting Mx */
+    /* On the server side start inactivity timer */
+    if (p_mcb->is_disc_initiator)
+    {
+        p_mcb->is_disc_initiator = FALSE;
+        rfc_mx_sm_execute (p_mcb, RFC_MX_EVENT_CLOSE_REQ, NULL);
+    }
+    else
+        rfc_timer_start (p_mcb, RFC_MCB_RELEASE_INACT_TIMER);
+}
+
+
+/*******************************************************************************
+**
+** Function         rfcomm_process_timeout
+**
+** Description      The function called every second to check RFCOMM timers
+**
+** Returns          void
+**
+*******************************************************************************/
+void rfcomm_process_timeout (TIMER_LIST_ENT  *p_tle)
+{
+    switch (p_tle->event)
+    {
+    case BTU_TTYPE_RFCOMM_MFC:
+        rfc_mx_sm_execute ((tRFC_MCB *)p_tle->param, RFC_EVENT_TIMEOUT, NULL);
+        break;
+
+    case BTU_TTYPE_RFCOMM_PORT:
+        rfc_port_sm_execute ((tPORT *)p_tle->param, RFC_EVENT_TIMEOUT, NULL);
+        break;
+
+    default:
+        break;
+    }
+}
+
+
+/*******************************************************************************
+**
+** Function         rfc_sec_check_complete
+**
+** Description      The function called when Security Manager finishes 
+**                  verification of the service side connection 
+**
+** Returns          void
+**
+*******************************************************************************/
+void rfc_sec_check_complete (BD_ADDR bd_addr, void *p_ref_data, UINT8 res)
+{
+    tPORT *p_port = (tPORT *)p_ref_data;
+
+    /* Verify that PORT is still waiting for Security to complete */
+    if (!p_port->in_use 
+     || ((p_port->rfc.state != RFC_STATE_ORIG_WAIT_SEC_CHECK)
+      && (p_port->rfc.state != RFC_STATE_TERM_WAIT_SEC_CHECK)))
+        return;
+
+    rfc_port_sm_execute ((tPORT *)p_ref_data, RFC_EVENT_SEC_COMPLETE, &res);
+}
+
+
+/*******************************************************************************
+**
+** Function         rfc_port_closed
+**
+** Description      The function is called when port is released based on the
+**                  event received from the lower layer, typically L2CAP 
+**                  connection down, DISC, or DM frame.
+**
+** Returns          void
+**
+*******************************************************************************/
+void rfc_port_closed (tPORT *p_port)
+{ 
+    tRFC_MCB *p_mcb = p_port->rfc.p_mcb;
+
+    RFCOMM_TRACE_DEBUG0 ("rfc_port_closed");
+    
+    rfc_port_timer_stop (p_port);
+
+    p_port->rfc.state = RFC_STATE_CLOSED;
+
+    /* If multiplexer channel was up mark it as down */
+    if (p_mcb)
+    {
+        p_mcb->port_inx[p_port->dlci] = 0;
+
+        /* If there are no more ports opened on this MCB release it */
+        rfc_check_mcb_active (p_mcb);
+    }
+
+    /* Notify port that RFC connection is gone */
+    port_rfc_closed (p_port, PORT_CLOSED);
+}
+
+/*******************************************************************************
+**
+** Function         rfc_inc_credit
+**
+** Description      The function is called when a credit is received in a UIH
+**                  frame.  It increments the TX credit count, and if data
+**                  flow had halted, it restarts it.
+**
+** Returns          void
+**
+*******************************************************************************/
+void rfc_inc_credit (tPORT *p_port, UINT8 credit)
+{
+    if (p_port->rfc.p_mcb->flow == PORT_FC_CREDIT)
+    {
+        p_port->credit_tx += credit;
+   
+        RFCOMM_TRACE_EVENT1 ("rfc_inc_credit:%d", p_port->credit_tx);
+
+        if (p_port->tx.peer_fc == TRUE)
+            PORT_FlowInd(p_port->rfc.p_mcb, p_port->dlci, TRUE);
+    }
+}
+
+/*******************************************************************************
+**
+** Function         rfc_dec_credit
+**
+** Description      The function is called when a UIH frame of user data is
+**                  sent.  It decrements the credit count.  If credit count
+**                  Reaches zero, peer_fc is set.
+**
+** Returns          void
+**
+*******************************************************************************/
+void rfc_dec_credit (tPORT *p_port)
+{
+    if (p_port->rfc.p_mcb->flow == PORT_FC_CREDIT)
+    {
+        if (p_port->credit_tx > 0)
+            p_port->credit_tx--;
+        
+        if (p_port->credit_tx == 0)
+            p_port->tx.peer_fc = TRUE;
+    }
+}
+
+
+/*******************************************************************************
+**
+** Function         rfc_check_send_cmd
+**
+** Description      This function is called to send an RFCOMM command message
+**                  or to handle the RFCOMM command message queue.
+**
+** Returns          void
+**
+*******************************************************************************/
+void rfc_check_send_cmd(tRFC_MCB *p_mcb, BT_HDR *p_buf)
+{
+    BT_HDR  *p;
+
+    /* if passed a buffer queue it */
+    if (p_buf != NULL)
+    {
+        GKI_enqueue(&p_mcb->cmd_q, p_buf);
+    }
+
+    /* handle queue if L2CAP not congested */
+    while (p_mcb->l2cap_congested == FALSE)
+    {
+        if ((p = (BT_HDR *) GKI_dequeue(&p_mcb->cmd_q)) == NULL)
+        {
+            break;
+        }
+
+
+        L2CA_DataWrite (p_mcb->lcid, p);
+    }
+}
+
+