/******************************************************************************
**
** MAIN PARSING FUNCTION
**
**
*******************************************************************************/
void bta_hf_client_at_parse(char *buf, unsigned int len)
{
APPL_TRACE_DEBUG("%s offset: %u len: %u", __FUNCTION__, bta_hf_client_cb.scb.at_cb.offset, len);
if (len + bta_hf_client_cb.scb.at_cb.offset > BTA_HF_CLIENT_AT_PARSER_MAX_LEN) {
unsigned int tmp = bta_hf_client_cb.scb.at_cb.offset;
unsigned int space_left = BTA_HF_CLIENT_AT_PARSER_MAX_LEN - bta_hf_client_cb.scb.at_cb.offset;
char *tmp_buff = osi_malloc(BTA_HF_CLIENT_AT_PARSER_MAX_LEN);
if (tmp_buff == NULL) {
APPL_TRACE_ERROR("No mem %s", __FUNCTION__);
return;
}
APPL_TRACE_DEBUG("%s overrun, trying to recover", __FUNCTION__);
/* fill up parser buffer */
memcpy(bta_hf_client_cb.scb.at_cb.buf + bta_hf_client_cb.scb.at_cb.offset, buf, space_left);
len -= space_left;
buf += space_left;
bta_hf_client_cb.scb.at_cb.offset += space_left;
/* find end of last complete command before proceeding */
while (bta_hf_client_check_at_complete() == FALSE) {
if (bta_hf_client_cb.scb.at_cb.offset == 0) {
APPL_TRACE_ERROR("HFPClient: AT parser buffer overrun, disconnecting");
bta_hf_client_at_reset();
bta_hf_client_sm_execute(BTA_HF_CLIENT_API_CLOSE_EVT, NULL);
osi_free(tmp_buff);
return;
}
bta_hf_client_cb.scb.at_cb.offset--;
}
/* cut buffer to complete AT event and keep cut data */
tmp += space_left - bta_hf_client_cb.scb.at_cb.offset;
memcpy(tmp_buff, bta_hf_client_cb.scb.at_cb.buf + bta_hf_client_cb.scb.at_cb.offset, tmp);
bta_hf_client_cb.scb.at_cb.buf[bta_hf_client_cb.scb.at_cb.offset] = '\0';
/* parse */
bta_hf_client_at_parse_start();
bta_hf_client_at_clear_buf();
/* recover cut data */
memcpy(bta_hf_client_cb.scb.at_cb.buf, tmp_buff, tmp);
bta_hf_client_cb.scb.at_cb.offset += tmp;
osi_free(tmp_buff);
}
memcpy(bta_hf_client_cb.scb.at_cb.buf + bta_hf_client_cb.scb.at_cb.offset, buf, len);
bta_hf_client_cb.scb.at_cb.offset += len;
/* If last event is complete, parsing can be started */
if (bta_hf_client_check_at_complete() == TRUE) {
bta_hf_client_at_parse_start();
bta_hf_client_at_clear_buf();
}
}
static void bta_hf_client_at_parse_start(void)
{
char *buf = bta_hf_client_cb.scb.at_cb.buf;
APPL_TRACE_DEBUG("%s", __FUNCTION__);
#ifdef BTA_HF_CLIENT_AT_DUMP
bta_hf_client_dump_at();
#endif
while(*buf != '\0')
{
int i;
char *tmp = NULL;
for(i = 0; i < bta_hf_client_psraser_cb_count; i++)
{
tmp = bta_hf_client_parser_cb[i](buf);
if (tmp == NULL)
{
APPL_TRACE_ERROR("HFPCient: AT event/reply parsing failed, skipping");
tmp = bta_hf_client_skip_unknown(buf);
break;
}
/* matched or unknown skipped, if unknown failed tmp is NULL so
this is also handled */
if (tmp != buf)
{
buf = tmp;
break;
}
}
/* could not skip unknown (received garbage?)... disconnect */
if (tmp == NULL)
{
APPL_TRACE_ERROR("HFPCient: could not skip unknown AT event, disconnecting");
bta_hf_client_at_reset();
bta_hf_client_sm_execute(BTA_HF_CLIENT_API_CLOSE_EVT, NULL);
return;
}
buf = tmp;
}
}
/*******************************************************************************
**
** Function bta_hf_client_rfc_close
**
** Description RFCOMM connection closed.
**
**
** Returns void
**
*******************************************************************************/
void bta_hf_client_rfc_close(tBTA_HF_CLIENT_DATA *p_data)
{
UNUSED(p_data);
/* reinitialize stuff */
bta_hf_client_cb.scb.peer_features = 0;
bta_hf_client_cb.scb.chld_features = 0;
bta_hf_client_cb.scb.role = BTA_HF_CLIENT_ACP;
bta_hf_client_cb.scb.svc_conn = FALSE;
bta_hf_client_cb.scb.send_at_reply = FALSE;
bta_hf_client_cb.scb.negotiated_codec = BTM_SCO_CODEC_CVSD;
bta_hf_client_at_reset();
bta_sys_conn_close(BTA_ID_HS, 1, bta_hf_client_cb.scb.peer_addr);
/* call close cback */
(*bta_hf_client_cb.p_cback)(BTA_HF_CLIENT_CLOSE_EVT, NULL);
/* if not deregistering reopen server */
if (bta_hf_client_cb.scb.deregister == FALSE)
{
/* Clear peer bd_addr so instance can be reused */
bdcpy(bta_hf_client_cb.scb.peer_addr, bd_addr_null);
/* start server as it might got closed on open*/
bta_hf_client_start_server();
bta_hf_client_cb.scb.conn_handle = 0;
/* Make sure SCO is shutdown */
bta_hf_client_sco_shutdown(NULL);
bta_sys_sco_unuse(BTA_ID_HS, 1, bta_hf_client_cb.scb.peer_addr);
}
/* else close port and deallocate scb */
else
{
bta_hf_client_close_server();
bta_hf_client_scb_disable();
}
}
/*******************************************************************************
**
** Function bta_hf_client_rfc_fail
**
** Description RFCOMM connection failed.
**
**
** Returns void
**
*******************************************************************************/
void bta_hf_client_rfc_fail(tBTA_HF_CLIENT_DATA *p_data)
{
UNUSED(p_data);
/* reinitialize stuff */
bta_hf_client_cb.scb.conn_handle = 0;
bta_hf_client_cb.scb.peer_features = 0;
bta_hf_client_cb.scb.chld_features = 0;
bta_hf_client_cb.scb.role = BTA_HF_CLIENT_ACP;
bta_hf_client_cb.scb.svc_conn = FALSE;
bta_hf_client_cb.scb.send_at_reply = FALSE;
bta_hf_client_cb.scb.negotiated_codec = BTM_SCO_CODEC_CVSD;
bta_hf_client_at_reset();
/* reopen server */
bta_hf_client_start_server();
/* call open cback w. failure */
bta_hf_client_cback_open(NULL, BTA_HF_CLIENT_FAIL_RFCOMM);
}
void bta_hf_client_at_init(void)
{
memset(&bta_hf_client_cb.scb.at_cb, 0, sizeof(tBTA_HF_CLIENT_AT_CB));
bta_hf_client_at_reset();
}
