/***************************************************************************** ** ** Name: obx_ssm.c ** ** File: OBEX Server State Machine and Control Block Access Functions ** ** Copyright (c) 2003-2011, Broadcom Corp., All Rights Reserved. ** Broadcom Bluetooth Core. Proprietary and confidential. ** *****************************************************************************/ #include #include "btu.h" /* for timer */ #include "obx_int.h" /* OBEX Server Action Functions Enums (must match obx_sr_action [below] */ enum { OBX_SA_CLOSE_PORT, OBX_SA_CONNECTION_ERROR, OBX_SA_STATE, OBX_SA_CONNECT_IND, OBX_SA_WC_CONN_IND, OBX_SA_NC_TO, OBX_SA_CONNECT_RSP, OBX_SA_AUTH_IND, OBX_SA_SND_RSP, OBX_SA_SAVE_REQ, OBX_SA_SND_PART, OBX_SA_REJ_REQ, OBX_SA_ABORT_RSP, OBX_SA_OP_RSP, OBX_SA_GET_IND, OBX_SA_GET_REQ, OBX_SA_SESSION_IND, OBX_SA_SESS_CONN_IND, OBX_SA_WC_SESS_IND, OBX_SA_SESSION_RSP, OBX_SA_PUT_IND, OBX_SA_SRM_PUT_REQ, OBX_SA_SRM_PUT_RSP, OBX_SA_SRM_GET_FCS, OBX_SA_SRM_GET_RSP, OBX_SA_SRM_GET_REQ, OBX_SA_CLEAN_PORT }; /* OBEX Server Action Functions */ static const tOBX_SR_ACT obx_sr_action[] = { obx_sa_close_port, obx_sa_connection_error, obx_sa_state, obx_sa_connect_ind, obx_sa_wc_conn_ind, obx_sa_nc_to, obx_sa_connect_rsp, obx_sa_auth_ind, obx_sa_snd_rsp, obx_sa_save_req, obx_sa_snd_part, obx_sa_rej_req, obx_sa_abort_rsp, obx_sa_op_rsp, obx_sa_get_ind, obx_sa_get_req, obx_sa_session_ind, obx_sa_sess_conn_ind, obx_sa_wc_sess_ind, obx_sa_session_rsp, obx_sa_put_ind, obx_sa_srm_put_req, obx_sa_srm_put_rsp, obx_sa_srm_get_fcs, obx_sa_srm_get_rsp, obx_sa_srm_get_req, obx_sa_clean_port }; /************ OBX Server FSM State/Event Indirection Table **************/ /* obx_ssm_event() first looks at obx_ssm_entry_map[][] to get an entry of the event of a particular state * 0 means the event in the current state is ignored. * a number with 0x80 bit set, use obx_sr_all_table[][] as the "state table". * other numbers, look up obx_sr_main_state_table[] for the state table of current state. * * once the state table is determined, * look up the "action" column to find the associated action function * and the "next state" column to find the "next state" candidate. * * The actual next state could be either the state in the "next state" column * or the state returned from the action function. */ static const UINT8 obx_ssm_entry_map[][OBX_SS_MAX-1] = { /* state name: NtCon SesIn CntIn WtAut AutIn Conn DscIn StpIn ActIn AbtIn PutIn GetIn Put Get PutS GetS Part WtCls */ /* CONN_R */{ 1, 0x82, 0x82, 1, 0x82, 0x86, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82 ,1 }, /* SESS_R */{ 3, 0x82, 0x82, 0x82, 0x82, 0x88, 3, 0x85, 0x85, 0x85, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 1 ,3 }, /* DISCNT_R */{ 0x86, 0x82, 0x82, 0x82, 0x82, 0x85, 0x82, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 1 ,0x86 }, /* PUT_R */{ 0x86, 0x82, 0x82, 0x82, 0x82, 1, 0x87, 0x87, 0x87, 0x82, 0x87, 0x87, 1, 0x82, 1, 0x82, 0x82 ,0x86 }, /* GET_R */{ 0x86, 0x82, 0x82, 0x82, 0x82, 2, 0x87, 0x87, 0x87, 0x82, 0x87, 0x87, 0x82, 1, 0x82, 1, 0x82 ,0x86 }, /* SETPATH_R*/{ 0x86, 0x82, 0x82, 0x82, 0x82, 3, 0x87, 0x87, 0x87, 0x82, 0x87, 0x87, 0x82, 0x82, 0x82, 0x82, 0x82 ,0x86 }, /* ACTION_R */{ 0x86, 0x82, 0x82, 0x82, 0x82, 4, 0x87, 0x87, 0x87, 0x82, 0x87, 0x87, 0x82, 0x82, 0x82, 0x82, 0x82 ,0x86 }, /* ABORT_R */{ 0x86, 0x82, 0x82, 0x82, 0x82, 0x86, 0x82, 0x82, 0x82, 0x82, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 1 ,0x86 }, /* CONN_C */{ 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0 }, /* SESS_C */{ 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0 }, /* DISCNT_C */{ 0, 0x82, 0x82, 0x82, 0x82, 0x82, 1, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82 ,0 }, /* PUT_C */{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 2, 0, 0 ,0 }, /* GET_C */{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 2, 0 ,0 }, /* SETPATH_C*/{ 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0 }, /* ACTION_C */{ 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0 ,0 }, /* ABORT_C */{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0 ,0 }, /* PORT_CLS */{ 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83 ,0x83 }, /* FCS_SET */{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 2 ,0 }, /* STATE */{ 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84, 0x84 ,0x84 }, /* TIMEOUT */{ 2, 0, 0, 2, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,2 }, /* BAD_REQ */{ 0x86, 0x82, 0x82, 0x82, 0x82, 0x86, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82 ,0x86 }, /* TX_EMPTY */{ 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0 } }; static const UINT8 obx_sr_all_table[][OBX_SM_NUM_COLS] = { /* Event Action Next State */ /* ABORT_R */{OBX_SM_NO_ACTION, OBX_SS_ABORT_INDICATED }, /* misc */{OBX_SA_CLOSE_PORT, OBX_SS_NOT_CONNECTED }, /* PORT_CLS */{OBX_SA_CONNECTION_ERROR, OBX_SS_NOT_CONNECTED }, /* STATE */{OBX_SA_STATE, OBX_SS_NULL }, /* DISCNT_R */{OBX_SM_NO_ACTION, OBX_SS_DISCNT_INDICATED }, /* misc */{OBX_SA_REJ_REQ, OBX_SS_NULL }, /* illegalop*/{OBX_SA_CLEAN_PORT, OBX_SS_NOT_CONNECTED }, /* SESS_R */{OBX_SA_SESSION_IND, OBX_SS_SESS_INDICATED } }; static const UINT8 obx_sr_not_conn_table[][OBX_SM_NUM_COLS] = { /* Event Action Next State */ /* CONN_R */{OBX_SA_CONNECT_IND, OBX_SS_CONN_INDICATED }, /* TIMEOUT */{OBX_SA_NC_TO, OBX_SS_NOT_CONNECTED}, /* SESS_R */{OBX_SA_SESS_CONN_IND, OBX_SS_SESS_INDICATED } }; static const UINT8 obx_sr_connect_ind_table[][OBX_SM_NUM_COLS] = { /* Event Action Next State */ /* CONN_C */{OBX_SA_CONNECT_RSP, OBX_SS_CONNECTED } }; static const UINT8 obx_sr_session_ind_table[][OBX_SM_NUM_COLS] = { /* Event Action Next State */ /* SESS_R */{OBX_SA_SESSION_RSP, OBX_SS_NOT_CONNECTED } }; static const UINT8 obx_sr_wait_auth_table[][OBX_SM_NUM_COLS] = { /* Event Action Next State */ /* CONN_R */{OBX_SA_AUTH_IND, OBX_SS_AUTH_INDICATED }, /* TIMEOUT */{OBX_SA_CLOSE_PORT, OBX_SS_NOT_CONNECTED} }; static const UINT8 obx_sr_conn_table[][OBX_SM_NUM_COLS] = { /* Event Action Next State */ /* PUT_R */{OBX_SA_PUT_IND, OBX_SS_PUT_INDICATED }, /* GET_R */{OBX_SA_GET_IND, OBX_SS_GET_INDICATED }, /* SETPATH_R*/{OBX_SM_NO_ACTION, OBX_SS_SETPATH_INDICATED }, /* ACTION_R */{OBX_SM_NO_ACTION, OBX_SS_ACTION_INDICATED } }; static const UINT8 obx_sr_disconnect_ind_table[][OBX_SM_NUM_COLS] = { /* Event Action Next State */ /* DISCNT_C */{OBX_SA_SND_RSP, OBX_SS_WAIT_CLOSE }, /* TIMEOUT */{OBX_SA_CLOSE_PORT, OBX_SS_NOT_CONNECTED}, /* SESS_R */{OBX_SA_SESSION_IND, OBX_SS_DISCNT_INDICATED} }; static const UINT8 obx_sr_setpath_ind_table[][OBX_SM_NUM_COLS] = { /* Event Action Next State */ /* SETPATH_C*/{OBX_SA_SND_RSP, OBX_SS_CONNECTED } }; static const UINT8 obx_sr_abort_ind_table[][OBX_SM_NUM_COLS] = { /* Event Action Next State */ /* GET/PUT_C*/{OBX_SA_OP_RSP, OBX_SS_ABORT_INDICATED }, /* ABORT_C */{OBX_SA_ABORT_RSP, OBX_SS_CONNECTED } }; static const UINT8 obx_sr_put_ind_table[][OBX_SM_NUM_COLS] = { /* Event Action Next State */ /* PUT_C */{OBX_SA_SND_RSP, OBX_SS_PUT_TRANSACTION } }; static const UINT8 obx_sr_get_ind_table[][OBX_SM_NUM_COLS] = { /* Event Action Next State */ /* GET_C */{OBX_SA_SND_RSP, OBX_SS_GET_TRANSACTION } }; static const UINT8 obx_sr_put_table[][OBX_SM_NUM_COLS] = { /* Event Action Next State */ /* PUT_R */{OBX_SM_NO_ACTION, OBX_SS_PUT_INDICATED } }; static const UINT8 obx_sr_get_table[][OBX_SM_NUM_COLS] = { /* Event Action Next State */ /* GET_R */{OBX_SA_GET_REQ, OBX_SS_GET_INDICATED } }; static const UINT8 obx_sr_put_s_table[][OBX_SM_NUM_COLS] = { /* Event Action Next State */ /* PUT_R */{OBX_SA_SRM_PUT_REQ, OBX_SS_PUT_SRM }, /* PUT_C */{OBX_SA_SRM_PUT_RSP, OBX_SS_PUT_SRM } }; static const UINT8 obx_sr_get_s_table[][OBX_SM_NUM_COLS] = { /* Event Action Next State */ /* GET_R */{OBX_SA_SRM_GET_REQ, OBX_SS_GET_SRM }, /* GET_C */{OBX_SA_SRM_GET_RSP, OBX_SS_GET_SRM }, /* FCS_SET */{OBX_SA_SRM_GET_FCS, OBX_SS_GET_SRM } }; static const UINT8 obx_sr_part_table[][OBX_SM_NUM_COLS] = { /* Event Action Next State */ /* ABORT_R */{OBX_SA_SAVE_REQ, OBX_SS_NULL },/* and DISCNT_R */ /* FCS_SET */{OBX_SA_SND_PART, OBX_SS_NULL } }; static const UINT8 obx_sr_wait_close_table[][OBX_SM_NUM_COLS] = { /* Event Action Next State */ /* CONN_R */{OBX_SA_WC_CONN_IND, OBX_SS_CONN_INDICATED }, /* TIMEOUT */{OBX_SA_NC_TO, OBX_SS_NOT_CONNECTED}, /* SESS_R */{OBX_SA_WC_SESS_IND, OBX_SS_SESS_INDICATED } }; static const tOBX_SM_TBL obx_sr_main_state_table[] = { obx_sr_not_conn_table, obx_sr_session_ind_table, obx_sr_connect_ind_table, obx_sr_wait_auth_table, obx_sr_connect_ind_table, /* same table for auth ind */ obx_sr_conn_table, obx_sr_disconnect_ind_table, obx_sr_setpath_ind_table, obx_sr_setpath_ind_table, /* same action table for action_ind */ obx_sr_abort_ind_table, obx_sr_put_ind_table, obx_sr_get_ind_table, obx_sr_put_table, obx_sr_get_table, obx_sr_put_s_table, obx_sr_get_s_table, obx_sr_part_table, obx_sr_wait_close_table }; /******************************************************************************* ** ** Function obx_ssm_event ** ** Description Handle events to the server state machine. It looks up the entry ** in the obx_ssm_entry_map array. If it is a valid entry, it gets ** the state table.Set the next state, if not NULL state.Execute ** the action function according to the state table. If the state ** returned by action function is not NULL state, adjust the new ** state to the returned state.If (api_evt != MAX), call callback ** function. ** ** Returns void. ** *******************************************************************************/ void obx_ssm_event(tOBX_SR_SESS_CB *p_scb, tOBX_SR_EVENT event, BT_HDR *p_msg) { UINT8 curr_state = p_scb->state; tOBX_SM_TBL state_table; UINT8 action, entry; tOBX_SR_STATE act_state = OBX_SS_NULL; UINT8 *p_data; UINT16 len; BT_HDR *p_dummy; tOBX_EVENT api_evt; tOBX_SR_CB *p_cb; #if 0 UINT8 srm; #endif if( curr_state == OBX_SS_NULL || curr_state >= OBX_SS_MAX) { OBX_TRACE_WARNING1( "Invalid state: %d", curr_state) ; if(p_msg) GKI_freebuf(p_msg); return; } OBX_TRACE_DEBUG6( "For Server SHandle 0x%x, State: %s, Event: %s/%d srm:0x%x ssn:%d", p_scb->ll_cb.comm.handle, obx_sr_get_state_name( p_scb->state ), obx_sr_get_event_name(event), event, p_scb->srm, p_scb->ssn ) ; /* look up the state table for the current state */ /* lookup entry /w event & curr_state */ /* If entry is ignore, return. * Otherwise, get state table (according to curr_state or all_state) */ /* coverity [index_parm] */ if( (entry = obx_ssm_entry_map[event][curr_state-1]) != OBX_SM_IGNORE ) { if(entry&OBX_SM_ALL) { entry &= OBX_SM_ENTRY_MASK; state_table = obx_sr_all_table; } else state_table = obx_sr_main_state_table[curr_state-1]; } else { OBX_TRACE_WARNING2( "Ignore event %d in state %d", event, curr_state ); if(p_msg) GKI_freebuf(p_msg); return; } /* Get possible next state from state table. */ if( state_table[entry-1][OBX_SME_NEXT_STATE] != OBX_CS_NULL ) p_scb->state = state_table[entry-1][OBX_SME_NEXT_STATE]; p_scb->prev_state = curr_state; OBX_TRACE_DEBUG3( "possible new state = %s/%s/%d", obx_sr_get_state_name(p_scb->state), obx_sr_get_state_name( p_scb->prev_state ), p_scb->prev_state) ; /* If action is not ignore, clear param, exec action and get next state. * The action function may set the Param for cback. * Depending on param, call cback or free buffer. */ /* execute action */ action = state_table[entry-1][OBX_SME_ACTION]; if (action != OBX_SM_NO_ACTION) { act_state = (*obx_sr_action[action])(p_scb, p_msg); } /* adjust next state, if it needs to use the new state returned from action function */ if( act_state != OBX_CS_NULL) { p_scb->state = act_state; OBX_TRACE_DEBUG1( "new state = %s (action)", obx_sr_get_state_name( p_scb->state ) ) ; } if(p_scb->api_evt) { api_evt = p_scb->api_evt; p_scb->api_evt = OBX_NULL_EVT; /* we do not want the operation to be challenged by the client */ if( event <= OBX_SEVT_MAX_REQ && event != OBX_CONNECT_REQ_SEVT && OBX_ReadByteStrHdr(p_msg, OBX_HI_CHALLENGE, &p_data, &len, 0) == TRUE) { /* send bad request response */ p_dummy = obx_build_dummy_rsp(p_scb, OBX_RSP_BAD_REQUEST); event += OBX_SEVT_DIFF_REQ_CFM; obx_ssm_event(p_scb, event, p_dummy); GKI_freebuf(p_msg); } else { p_cb = &obx_cb.server[p_scb->handle - 1]; (p_cb->p_cback) (p_scb->ll_cb.comm.handle, api_evt, p_scb->param, p_msg); } memset(&p_scb->param, 0, sizeof (p_scb->param) ); } else if(action == OBX_SM_NO_ACTION && p_msg) GKI_freebuf(p_msg); OBX_TRACE_DEBUG2( "result state = %s ssn:%d", obx_sr_get_state_name( p_scb->state ), p_scb->ssn ) ; }