FreeCalypso > hg > fc-magnetite
view src/g23m-gprs/sm/sm_dispatch_message.c @ 376:3f1a587b3a84
doc/Voice-pseudo-modem written
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 13 Jan 2018 00:40:14 +0000 |
parents | 219afcfc6250 |
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/*---------------------------------------------------------------------------- | Project : 3G PS | Module : SM +----------------------------------------------------------------------------- | Copyright 2003 Texas Instruments. | All rights reserved. | | This file is confidential and a trade secret of Texas | Instruments . | The receipt of or possession of this file does not convey | any rights to reproduce or disclose its contents or to | manufacture, use, or sell anything it may describe, in | whole, or in part, without the specific written consent of | Texas Instruments. +----------------------------------------------------------------------------- | Purpose: This module implements the process dispatcher for incoming | air interface messages in the Session Management (SM) entity. | For design details, see: | 8010.908 SM Detailed Specification +---------------------------------------------------------------------------*/ /*==== DECLARATION CONTROL =================================================*/ /*==== INCLUDES =============================================================*/ #include "sm.h" #include "ccdapi.h" #include "sm_network_control.h" #include "sm_aci_output_handler.h" #include "sm_mm_output_handler.h" /*==== CONSTS ===============================================================*/ /*==== TYPES ================================================================*/ /*==== LOCALS ===============================================================*/ /*==== PRIVATE FUNCTIONS ====================================================*/ /*==== PUBLIC FUNCTIONS =====================================================*/ /* +------------------------------------------------------------------------------ | Function : sm_disp_mmpm_unitdata_ind +------------------------------------------------------------------------------ | Description : Dispatch MMPM_UNITDATA_IND | | Parameters : prim - received primitive +------------------------------------------------------------------------------ */ void sm_disp_mmpm_unitdata_ind(T_MMPM_UNITDATA_IND *prim) { U8 ti, ti_flag, msg_type, *msg, ccdResult; U16 offset; struct T_SM_CONTEXT_DATA *context; T_CAUSE_ps_cause cause; (void)TRACE_FUNCTION("sm_disp_mmpm_unitdata_ind"); offset = (U16)(prim->sdu.o_buf + 7) >> 3; /* Offset in octets/bytes in message buffer */ msg = &prim->sdu.buf[offset]; /* Read L3 header: First TI/PD octet */ ti_flag = (msg[0] & SM_TI_FLAG) == (U8)0 ? (U8)SM_TI_FLAG : (U8)0; ti = (msg[0] >> 4) & SM_TI_NON_EXT_MASK; /* Check for extended TI: If TI == 7, read next octet for real TI */ if (ti == (U8)SM_TI_EXTEND_VALUE) { ti = msg[1]; /* Read real TI from next octet in message */ if ((ti & (U8)SM_TI_FLAG) == (U8)0) { /* Messages with TI EXT bit = 0 shall be ignored: [3G 24.008, 8.3.2] */ (void)TRACE_ERROR("Warning: TI EXT bit = 0 in message - message ignored!"); return; } else { ti &= SM_TI_MASK; } offset = (U16)16; /* # bits to advance message pointer to reach message type */ msg_type = msg[2]; /* Get message type octet after TI */ (void)TRACE_EVENT_P1(" Extended TI found: 0x%02x", ti); } else { offset = (U16)8; /* # bits to advance message pointer to reach message type */ (void)TRACE_EVENT_P1(" Non-extended TI found: 0x%02x", ti); msg_type = msg[1]; /* Get message type octet after TI */ } /* Set highest bit iff the direction flag bit was set above */ ti |= ti_flag; /* Advance message pointer past TI/PD octet(s) */ prim->sdu.l_buf -= offset; prim->sdu.o_buf += offset; /* Check for message too short: [3G 24.008, 8.2] */ if (prim->sdu.l_buf < (U16)8) { (void)TRACE_ERROR("Warning! Message too short - discarded..."); return; } /* Find context with TI = ti, if already active/being activated */ context = sm_get_context_data_from_ti(ti); switch (msg_type) { case ACTIVATE_PDP_CONTEXT_ACCEPT: case ACTIVATE_PDP_CONTEXT_REJECT: case ACTIVATE_SECONDARY_PDP_CONTEXT_ACCEPT: case ACTIVATE_SECONDARY_PDP_CONTEXT_REJECT: case D_MODIFY_PDP_CONTEXT_REQUEST: case D_MODIFY_PDP_CONTEXT_ACCEPT: case MODIFY_PDP_CONTEXT_REJECT: case DEACTIVATE_PDP_CONTEXT_REQUEST: case DEACTIVATE_PDP_CONTEXT_ACCEPT: if (context == NULL) { /* Message received on TI not relating to an active context, or context * being activated/deactivated: [3G 24.008, 8.3.2 b)]*/ (void)TRACE_ERROR("Message received on TI not relating to an active context, or context being activated/deactivated"); cause.ctrl_value = CAUSE_is_from_nwsm; cause.value.nwsm_cause = (U16)CAUSE_NWSM_INVALID_TI; send_msg_sm_status(ti, &cause); return; } break; case REQUEST_PDP_CONTEXT_ACTIVATION: if (ti_flag == (U8)0) { /* Ignore REQUEST PDP CONTEXT ACTIVATION msg with TI flag = 1 [3G 24.008, 8.3.2 c)] */ /* Note: flag bit is inverted above! */ (void)TRACE_EVENT("REQUEST PDP CONTEXT ACTIVATION msg with TI flag = 1 ignored..."); return; } if (context == NULL) { /* If no context exists for the TI, create one. */ context = sm_insert_mt_context_data(ti); } break; case SM_STATUS: if (context == NULL) { /* Silently ignore message */ return; } break; case ACTIVATE_PDP_CONTEXT_REQUEST: /* FALL-THROUGH */ case ACTIVATE_SECONDARY_PDP_CONTEXT_REQUEST: /* FALL-THROUGH */ case REQUEST_PDP_CONTEXT_ACTIVATION_REJECT: /* FALL-THROUGH */ case U_MODIFY_PDP_CONTEXT_REQUEST: /* FALL-THROUGH */ case U_MODIFY_PDP_CONTEXT_ACCEPT: /* FALL-THROUGH */ default: /* Message type not defined for the PD in the given direction: [3G 24.008, 8.4] */ (void)TRACE_ERROR("Message type not defined for the PD in the given direction"); cause.ctrl_value = CAUSE_is_from_nwsm; cause.value.nwsm_cause = (U16)CAUSE_NWSM_MSG_TYPE_NOT_IMPLEMENTED; send_msg_sm_status(ti, &cause); return; } /* switch */ TRACE_ASSERT(context != NULL); /* Decode message */ ccdResult = ccd_decodeMsg((U8)CCDENT_SM, (U8)DOWNLINK, (T_MSGBUF *)&prim->sdu, (UBYTE *) _decodedMsg, (U8)NOT_PRESENT_8BIT); if (ccdResult != (U8)ccdOK) { /* Error Handling */ U16 parlist[6]; U8 first_err; U8 ccd_err; /* clear parlist */ memset (parlist, 0, sizeof (parlist)); first_err = ccd_getFirstError((U8)CCDENT_SM, parlist); ccd_err = first_err; /* Loop over errors in parlist. Fix inherited from TI Berlin. */ do { /* Error Handling */ switch (ccd_err) { case ERR_COMPREH_REQUIRED: /* Comprehension required */ case ERR_MAND_ELEM_MISS: { /* Mandatory elements missing */ (void)TRACE_ERROR("CCD ERROR: Mandatory elements missing"); if (msg_type == (U8)DEACTIVATE_PDP_CONTEXT_REQUEST) { /* [3G 24.008, 8.5.5]: If msg_type is DEACTIVATE PDP CONTEXT REQUEST, * respond with DEACTIVATE PDP CONTEXT ACCEPT and release context. */ send_msg_deactivate_pdp_context_accept(context); } else if (msg_type == (U8)REQUEST_PDP_CONTEXT_ACTIVATION) { /* [3G 24.008, 8.5.5]: If msg_type is REQUEST PDP CONTEXT ACTIVATION, * respond with SM STATUS, cause #96 "invalid mandatory information". */ cause.ctrl_value = CAUSE_is_from_nwsm; cause.value.nwsm_cause = (U16)CAUSE_NWSM_INVALID_MANDATORY_ELEMENT; send_msg_sm_status(ti, &cause); return; } else { cause.ctrl_value = CAUSE_is_from_nwsm; cause.value.nwsm_cause = (U16)CAUSE_NWSM_INVALID_MANDATORY_ELEMENT; send_msg_sm_status(ti, &cause); return; } /*@switchbreak@*/ break; } } /* switch */ ccd_err = ccd_getNextError ((U8)CCDENT_SM, parlist); } while (ccd_err != (U8)ERR_NO_MORE_ERROR); } /* if (ccdResult...) */ switch (msg_type) { case ACTIVATE_PDP_CONTEXT_ACCEPT: /* Forward to Network Control */ sm_network_control(context, SM_M_ACTIVATE_PDP_CONTEXT_ACCEPT, _decodedMsg); break; case ACTIVATE_PDP_CONTEXT_REJECT: /* Forward to Network Control */ sm_network_control(context, SM_M_ACTIVATE_PDP_CONTEXT_REJECT, _decodedMsg); break; case ACTIVATE_SECONDARY_PDP_CONTEXT_ACCEPT: /* Forward to Network Control */ sm_network_control(context, SM_M_ACTIVATE_SECONDARY_PDP_CONTEXT_ACCEPT, _decodedMsg); break; case ACTIVATE_SECONDARY_PDP_CONTEXT_REJECT: /* Forward to Network Control */ sm_network_control(context, SM_M_ACTIVATE_SECONDARY_PDP_CONTEXT_REJECT, _decodedMsg); break; case REQUEST_PDP_CONTEXT_ACTIVATION: /* Forward to Network Control */ sm_network_control(context, SM_M_REQUEST_PDP_CONTEXT_ACTIVATION, _decodedMsg); break; case D_MODIFY_PDP_CONTEXT_REQUEST: /* Forward to Network Control */ sm_network_control(context, SM_M_MODIFY_PDP_CONTEXT_REQUEST, _decodedMsg); break; case D_MODIFY_PDP_CONTEXT_ACCEPT: /* Forward to Network Control */ sm_network_control(context, SM_M_MODIFY_PDP_CONTEXT_ACCEPT, _decodedMsg); break; case MODIFY_PDP_CONTEXT_REJECT: /* Forward to Network Control */ sm_network_control(context, SM_M_MODIFY_PDP_CONTEXT_REJECT, _decodedMsg); break; case DEACTIVATE_PDP_CONTEXT_REQUEST: /* Forward to Network Control */ sm_network_control(context, SM_M_DEACTIVATE_PDP_CONTEXT_REQUEST, _decodedMsg); break; case DEACTIVATE_PDP_CONTEXT_ACCEPT: /* Forward to Network Control */ sm_network_control(context, SM_M_DEACTIVATE_PDP_CONTEXT_ACCEPT, _decodedMsg); break; case SM_STATUS: /* Forward to Network Control */ sm_network_control(context, SM_M_SM_STATUS, _decodedMsg); break; } /* switch */ /* Deallocate context if it was marked for deactivation by the above operation */ /*lint -e613 (Possible use of null pointer 'context' in left argument to operator '->') */ if (sm_is_context_pending_deallocation(context)) { sm_free_context_data_by_nsapi(context->nsapi); } } /*==== END OF FILE ==========================================================*/