FreeCalypso > hg > fc-magnetite
view src/g23m-gprs/llc/llc_us.c @ 407:f7f1f6f1a77d
init.c module: a chance at being correct for the D-Sample target
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 18 Jan 2018 04:45:11 +0000 |
parents | 219afcfc6250 |
children |
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/* +----------------------------------------------------------------------------- | Project : | Modul : +----------------------------------------------------------------------------- | Copyright 2002 Texas Instruments Berlin, AG | All rights reserved. | | This file is confidential and a trade secret of Texas | Instruments Berlin, AG | 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 Berlin, AG. +----------------------------------------------------------------------------- | Purpose : This modul is part of the entity LLC and implements all | functions to handles the incoming process internal signals as | described in the SDL-documentation (U-statemachine) +----------------------------------------------------------------------------- */ #ifndef LLC_US_C #define LLC_US_C #endif #define ENTITY_LLC /*==== INCLUDES =============================================================*/ #include "typedefs.h" /* to get Condat data types */ #include "vsi.h" /* to get a lot of macros */ #include "macdef.h" #include "gprs.h" #include "gsm.h" /* to get a lot of macros */ #include "cnf_llc.h" /* to get cnf-definitions */ #include "mon_llc.h" /* to get mon-definitions */ #include "prim.h" /* to get the definitions of used SAP and directions */ #include "llc.h" /* to get the global entity definitions */ #include "llc_f.h" #include "llc_uf.h" /* to get local U functions */ #include "llc_ul.h" /* to get local U labels */ #include "llc_t200s.h" /* to get signal interface to T200 */ #include "llc_txs.h" /* to get signal interface to TX */ #include "llc_llmes.h" /* to get signal interface to LLME */ /*==== CONST ================================================================*/ /*==== LOCAL VARS ===========================================================*/ /*==== PRIVATE FUNCTIONS ====================================================*/ /*==== PUBLIC FUNCTIONS =====================================================*/ /* +------------------------------------------------------------------------------ | Function : sig_llme_u_assign_req +------------------------------------------------------------------------------ | Description : Handles the internal signal SIG_LLME_U_ASSIGN_REQ | | Parameters : | +------------------------------------------------------------------------------ */ GLOBAL void sig_llme_u_assign_req (void) { TRACE_ISIG( "sig_llme_u_assign_req" ); switch (GET_STATE(U)) { case U_TLLI_UNASSIGNED: u_init_sapi(); SET_STATE (U, U_ADM); break; default: TRACE_ERROR( "SIG_LLME_U_ASSIGN_REQ unexpected" ); break; } } /* sig_llme_u_assign_req() */ /* +------------------------------------------------------------------------------ | Function : sig_llme_u_unassign_req +------------------------------------------------------------------------------ | Description : Handles the internal signal SIG_LLME_U_UNASSIGN_REQ | | Parameters : | +------------------------------------------------------------------------------ */ GLOBAL void sig_llme_u_unassign_req (void) { TRACE_ISIG( "sig_llme_u_unassign_req" ); switch (GET_STATE(U)) { case U_TLLI_UNASSIGNED: TRACE_ERROR( "SIG_LLME_U_UNASSIGN_REQ unexpected" ); break; default: sig_u_t200_stop_req(); SET_STATE (U, U_TLLI_UNASSIGNED); break; } } /* sig_llme_u_unassign_req() */ /* +------------------------------------------------------------------------------ | Function : sig_rx_u_data_ind +------------------------------------------------------------------------------ | Description : Handles the internal signal SIG_RX_U_DATA_IND | | Parameters : ll_unitdata_ind - a valid pointer to an LL-UNITDATA-IND | primitive | command - contains the command within the primitive | cr_bit - setting of the C/R bit | pf_bit - setting of the P/F bit | +------------------------------------------------------------------------------ */ GLOBAL void sig_rx_u_data_ind (T_LL_UNITDATA_IND *ll_unitdata_ind, T_COMMAND command, T_BIT cr_bit, T_BIT pf_bit) { BOOL reset_received; BOOL xid_ind; BOOL rc_xid_valid; BOOL l3p_outstanding; TRACE_ISIG( "sig_rx_u_data_ind" ); /* * Set TLLI for current transaction. */ llc_data->u->current_tlli = ll_unitdata_ind->tlli; switch (GET_STATE(U)) { case U_ADM: if (cr_bit EQ SGSN_COMMAND) { /* * Label ADM_COMMAND */ switch (command) { case U_SABM: /* COMMAND ADM */ /* * Label ADM_SABM */ if (pf_bit EQ 1) { if ( (llc_data->current_sapi EQ LL_SAPI_1) || (llc_data->current_sapi EQ LL_SAPI_7) ) { /* * ABM not possible on SAPI 1 and 7 */ PFREE (ll_unitdata_ind); u_send_dm (pf_bit); } else /* current_sapi is one of 3, 5, 9, or 11 */ { rc_xid_valid = u_check_xid (&(ll_unitdata_ind->sdu), cr_bit, command); PFREE (ll_unitdata_ind); if (rc_xid_valid) { /* * No check needed, reset_received cannot be TRUE * (<R.LLC.XID_INVA.A.003>) and xid_ind is meaningless * (LL_ESTABLISH_IND contains N201-U/I). */ u_eval_xid (cr_bit, &reset_received, &xid_ind); /* * Check XID/SABM collision issue - XID command shall * be treated as not transmitted. */ if (llc_data->u->xid_pending) { llc_data->u->xid_pending = FALSE; sig_u_t200_stop_req(); } /* * Label S_EST_IND */ u_label_s_est_ind (pf_bit); } } } else /* pf_bit is not set */ { PFREE (ll_unitdata_ind); } break; case U_XID: /* COMMAND ADM */ /* * Label XID */ u_label_xid (ll_unitdata_ind, command, cr_bit, pf_bit); break; case U_DISC: /* COMMAND ADM */ PFREE (ll_unitdata_ind); if (pf_bit EQ 1) { u_send_dm (pf_bit); } break; default: if (pf_bit EQ 1) { llc_data->u->frmr_reason = FRMR_UNDEFINED_CTRL; /* * Label FRMR_COND */ u_label_frmr_cond (ll_unitdata_ind, cr_bit, llc_data->u->frmr_reason); } else { PFREE (ll_unitdata_ind); } break; } } else /* SGSN_RESPONSE */ { /* * Label ADM_RESPONSE */ switch (command) { case U_UA: /* RESPONSE ADM */ PFREE (ll_unitdata_ind); u_send_llgmm_status_ind (LLGMM_ERRCS_MULT_ASS_TLLI); break; case U_DM: /* RESPONSE ADM */ PFREE (ll_unitdata_ind); break; case U_XID: /* RESPONSE ADM */ /* * Label XIDRES */ u_label_xidres (ll_unitdata_ind, command, cr_bit, pf_bit); break; case U_FRMR: /* RESPONSE ADM */ PFREE (ll_unitdata_ind); u_send_llgmm_status_ind (LLGMM_ERRCS_FRMR_RECEIVED); break; default: llc_data->u->frmr_reason = FRMR_UNDEFINED_CTRL; /* * Label FRMR_COND */ u_label_frmr_cond (ll_unitdata_ind, cr_bit, llc_data->u->frmr_reason); break; } } break; /* U_ADM */ case U_LOCAL_ESTABLISHMENT: if (cr_bit EQ SGSN_COMMAND) { /* * Label LEST_COMMAND */ switch (command) { case U_SABM: /* COMMAND LOCAL_ESTABLISHMENT */ /* * Label LEST_SABM */ if (pf_bit EQ 1) { rc_xid_valid = u_check_xid (&ll_unitdata_ind->sdu, cr_bit, command); PFREE (ll_unitdata_ind); if (rc_xid_valid) { if ((llc_data->decoded_l3_xid.valid EQ TRUE) AND !(llc_data->u->xid_tag_sent & (0x00000001L << XID_LAYER_3))) { /* * No check needed, reset_received cannot be TRUE * (<R.LLC.XID_INVA.A.003>) and xid_ind is meaningless * (LL_ESTABLISH_IND contains N201-U/I). */ u_eval_xid (cr_bit, &reset_received, &xid_ind); /* * Label S_EST_IND */ u_label_s_est_ind (pf_bit); } } } else /* pf_bit is not set */ { PFREE (ll_unitdata_ind); } break; case U_DISC: /* COMMAND LOCAL_ESTABLISHMENT */ PFREE (ll_unitdata_ind); if (pf_bit EQ 1) { PALLOC (ll_release_ind, LL_RELEASE_IND); ll_release_ind->sapi = llc_data->current_sapi; #ifdef LL_2to1 ll_release_ind->ps_cause.ctrl_value = CAUSE_is_from_llc; ll_release_ind->ps_cause.value.llc_cause = LL_RELCS_NORMAL; #else ll_release_ind->cause = LL_RELCS_NORMAL; #endif TRACE_1_OUT_PARA("s:%d", ll_release_ind->sapi); PSEND (hCommSNDCP, ll_release_ind); u_send_dm (1); SET_STATE (U, U_ADM); } break; case U_XID: /* COMMAND LOCAL_ESTABLISHMENT */ /* * Label XID_SABM_SEND */ u_label_xid_sabm_send (ll_unitdata_ind, cr_bit, pf_bit); break; default: if (pf_bit EQ 1) { llc_data->u->frmr_reason = FRMR_UNDEFINED_CTRL; /* * Label FRMR_COND */ u_label_frmr_cond (ll_unitdata_ind, cr_bit, llc_data->u->frmr_reason); } else { PFREE (ll_unitdata_ind); } break; } } else /* SGSN_RESPONSE */ { /* * Label LEST_RESPONSE */ switch (command) { case U_UA: /* RESPONSE LOCAL_ESTABLISHMENT */ /* * Label LEST_UA */ if (pf_bit EQ 1) { rc_xid_valid = u_check_xid (&ll_unitdata_ind->sdu, cr_bit, command); if (rc_xid_valid) { l3p_outstanding = (llc_data->u->xid_tag_sent & (0x1L << XID_LAYER_3)) ? TRUE : FALSE; /* * An UA response frame should only be handled if the XID L3 * para are included or not same as requested. Else ignore it! */ if (llc_data->decoded_l3_xid.valid == l3p_outstanding) { /* * <R.LLC.ABMEST_R.A.018> */ sig_u_t200_stop_req(); /* * If an XID parameter is not included in the response and * if it was included in the request, the requested value is * implicit accepted. */ u_handle_optimization (); /* * Reset_received cannot be TRUE, otherwise * frame would not be valid */ u_eval_xid (cr_bit, &reset_received, &xid_ind); PFREE (ll_unitdata_ind); if (llc_data->u->release_requested == TRUE) { /* * Do not send any establish confirmation to L3 and start * release procedure */ llc_data->u->retransmission_counter = 0; SET_STATE (U, U_LOCAL_RELEASE); /* * Send GRLC_DATA_REQ (DISC), start T200. */ u_send_disc(); } else { if (llc_data->u->ind_cnf_establishment EQ IND_ESTABLISHMENT) { u_send_ll_establish_ind (); SET_STATE (U, U_ESTABLISH_RES_PENDING); /* * start ABM (re-)establish when establish response is received */ } else /* CNF_ESTABLISHMENT */ { u_send_ll_establish_cnf (); SET_STATE (U, U_ABM); /* * inform LLME about (re-)establischment */ sig_u_llme_abmest_ind(); } } } else { PFREE (ll_unitdata_ind); } } else { PFREE (ll_unitdata_ind); /* * request T200 to let the timer manually expire, * thus retransmitting the frame immediately */ sig_u_t200_expire_req (); /* SET_STATE (U, SAME_STATE); */ } } else /* pf_bit == 0 */ { PFREE (ll_unitdata_ind); u_send_llgmm_status_ind (LLGMM_ERRCS_MULT_ASS_TLLI); /* SET_STATE (U, SAME_STATE); */ } break; case U_DM: /* RESPONSE LOCAL_ESTABLISHMENT */ /* * Label LEST_DM */ PFREE (ll_unitdata_ind); if (pf_bit EQ 1) { sig_u_t200_stop_req(); if (llc_data->u->release_requested == TRUE) { u_send_ll_release_cnf (); } else { u_send_ll_release_ind (LL_RELCS_DM_RECEIVED); } SET_STATE (U, U_ADM); } break; case U_XID: /* RESPONSE LOCAL_ESTABLISHMENT */ /* * Label XIDRES */ u_label_xidres (ll_unitdata_ind, command, cr_bit, pf_bit); break; case U_FRMR: /* RESPONSE LOCAL_ESTABLISHMENT */ PFREE (ll_unitdata_ind); u_send_llgmm_status_ind (LLGMM_ERRCS_FRMR_RECEIVED); break; default: llc_data->u->frmr_reason = FRMR_UNDEFINED_CTRL; /* * Label FRMR_COND */ u_label_frmr_cond (ll_unitdata_ind, cr_bit, llc_data->u->frmr_reason); break; } } break; /* U_LOCAL_ESTABLISHMENT */ case U_ABM: if (cr_bit EQ SGSN_COMMAND) { /* * Label ABM_COMMAND */ switch (command) { case U_SABM: /* COMMAND ABM */ /* * Label ABM_REEST_PEER */ if (pf_bit EQ 1) { u_send_llgmm_status_ind (LLGMM_ERRCS_PEER_REEST); rc_xid_valid = u_check_xid (&ll_unitdata_ind->sdu, cr_bit, command); PFREE (ll_unitdata_ind); if (rc_xid_valid) { /* * No check needed, reset_received cannot be TRUE * (<R.LLC.XID_INVA.A.003>) and xid_ind is meaningless * (LL_ESTABLISH_IND contains N201-U/I). */ u_eval_xid (cr_bit, &reset_received, &xid_ind); /* * Label S_EST_IND */ u_label_s_est_ind (pf_bit); } } else /* pf_bit == 0 */ { PFREE (ll_unitdata_ind); } break; case U_DISC: /* COMMAND ABM */ /* * Label ABM_DISC */ PFREE (ll_unitdata_ind); if (pf_bit EQ 1) { PALLOC (ll_release_ind, LL_RELEASE_IND); ll_release_ind->sapi = llc_data->current_sapi; #ifdef LL_2to1 ll_release_ind->ps_cause.ctrl_value = CAUSE_is_from_llc; ll_release_ind->ps_cause.value.llc_cause = LL_RELCS_NORMAL; #else ll_release_ind->cause = LL_RELCS_NORMAL; #endif TRACE_1_OUT_PARA("s:%d", ll_release_ind->sapi); PSEND (hCommSNDCP, ll_release_ind); SET_STATE (U, U_ADM); sig_u_llme_abmrel_ind(); /* * Send UA response without XID information field (= FALSE). */ u_send_ua (pf_bit, FALSE); } break; case U_XID: /* COMMAND ABM */ /* * Label XID */ u_label_xid (ll_unitdata_ind, command, cr_bit, pf_bit); break; default: if (pf_bit EQ 1) { llc_data->u->frmr_reason = FRMR_UNDEFINED_CTRL_ABM; /* * Label FRMR_COND_REEST */ u_label_frmr_cond_reest (ll_unitdata_ind, cr_bit, llc_data->u->frmr_reason); } else { PFREE (ll_unitdata_ind); } break; } } else /* SGSN_RESPONSE */ { /* * Label ABM_RESPONSE */ switch (command) { case U_UA: /* RESPONSE ABM */ /* * Label ABM_UA */ PFREE (ll_unitdata_ind); u_send_llgmm_status_ind (LLGMM_ERRCS_MULT_ASS_TLLI); break; case U_DM: /* RESPONSE ABM */ /* * Label ABM_DM */ PFREE (ll_unitdata_ind); if (pf_bit EQ 1) { u_send_llgmm_status_ind (LLGMM_ERRCS_DM1_RECEIVED); } else /* pf_bit == 0 */ { u_send_llgmm_status_ind (LLGMM_ERRCS_DM0_RECEIVED_REEST); llc_data->u->retransmission_counter = 0; /* * Send LL_ESTABLISH_IND after successful establishment. */ llc_data->u->ind_cnf_establishment = IND_ESTABLISHMENT; SET_STATE (U, U_LOCAL_ESTABLISHMENT); sig_u_llme_abmrel_ind(); /* * Re-establishment procedure: send GRLC_DATA_REQ (SABM), * start T200. */ u_send_sabm(); } break; case U_XID: /* RESPONSE ABM */ /* * Label XIDRES */ u_label_xidres (ll_unitdata_ind, command, cr_bit, pf_bit); break; case U_FRMR: /* RESPONSE ABM */ PFREE (ll_unitdata_ind); u_send_llgmm_status_ind (LLGMM_ERRCS_FRMR_RECEIVED); break; default: llc_data->u->frmr_reason = FRMR_UNDEFINED_CTRL_ABM; /* * Label FRMR_COND_REEST */ u_label_frmr_cond_reest (ll_unitdata_ind, cr_bit, llc_data->u->frmr_reason); break; } } break; /* U_ABM */ case U_LOCAL_RELEASE: if (cr_bit EQ SGSN_COMMAND) { /* * Label LREL_COMMAND */ switch (command) { case U_SABM: /* COMMAND LOCAL_RELEASE */ PFREE (ll_unitdata_ind); if (pf_bit EQ 1) { /* * Send DM response with F bit set to 1. */ u_send_dm (1); } break; case U_DISC: /* COMMAND LOCAL_RELEASE */ PFREE (ll_unitdata_ind); if (pf_bit EQ 1) { /* * Send UA response with F bit set to 1, but without information * field (= FALSE). */ u_send_ua (1, FALSE); } break; case U_XID: /* COMMAND LOCAL_RELEASE */ /* * Label XID */ u_label_xid (ll_unitdata_ind, command, cr_bit, pf_bit); break; default: if (pf_bit EQ 1) { llc_data->u->frmr_reason = FRMR_UNDEFINED_CTRL; /* * Label FRMR_COND */ u_label_frmr_cond (ll_unitdata_ind, cr_bit, llc_data->u->frmr_reason); } else { PFREE (ll_unitdata_ind); } break; } } else /* SGSN_RESPONSE */ { /* * Label LREL_RESPONSE */ switch (command) { case U_UA: /* RESPONSE LOCAL_RELEASE */ /* * no break! */ case U_DM: /* RESPONSE LOCAL_RELEASE */ /* * Label LREL_UA_DM */ PFREE (ll_unitdata_ind); if (pf_bit EQ 1) { SET_STATE (U, U_ADM); sig_u_t200_stop_req(); u_send_ll_release_cnf(); } else /* pf_bit == 0 */ { if (command EQ U_UA) { u_send_llgmm_status_ind (LLGMM_ERRCS_MULT_ASS_TLLI); } } break; case U_XID: /* RESPONSE LOCAL_RELEASE */ /* * Label XIDRES */ u_label_xidres (ll_unitdata_ind, command, cr_bit, pf_bit); break; case U_FRMR: /* RESPONSE LOCAL_RELEASE */ PFREE (ll_unitdata_ind); u_send_llgmm_status_ind (LLGMM_ERRCS_FRMR_RECEIVED); break; default: llc_data->u->frmr_reason = FRMR_UNDEFINED_CTRL; /* * Label FRMR_COND */ u_label_frmr_cond (ll_unitdata_ind, cr_bit, llc_data->u->frmr_reason); break; } } break; /* U_LOCAL_RELEASE */ default: PFREE (ll_unitdata_ind); TRACE_ERROR( "SIG_RX_U_DATA_IND unexpected" ); break; } } /* sig_rx_u_data_ind() */ /* +------------------------------------------------------------------------------ | Function : sig_rx_u_frmr_ind +------------------------------------------------------------------------------ | Description : Handles the internal signal SIG_RX_U_FRMR_IND | | Parameters : ll_unitdata_ind - valid pointer to the frame that caused the | frame rejection condition | pdu_type - type of frame | frmr_ctrl_length - length of frame control field, if known | cr_bit - C/R bit setting of frame | frmr_reason - reason of frame rejection condition | +------------------------------------------------------------------------------ */ GLOBAL void sig_rx_u_frmr_ind (T_LL_UNITDATA_IND *ll_unitdata_ind, T_PDU_TYPE pdu_type, USHORT frmr_ctrl_length, T_BIT cr_bit, UBYTE frmr_reason) { TRACE_ISIG( "sig_rx_u_frmr_ind" ); /* * Set TLLI for current transaction. */ llc_data->u->current_tlli = ll_unitdata_ind->tlli; switch (GET_STATE (U)) { case U_ADM: case U_LOCAL_ESTABLISHMENT: case U_ESTABLISH_RES_PENDING: case U_REMOTE_ESTABLISHMENT: /* * No break! */ case U_LOCAL_RELEASE: u_send_llgmm_status_ind (LLGMM_ERRCS_FRMR_COND); u_send_frmr (ll_unitdata_ind, pdu_type, frmr_ctrl_length, llc_data->sapi->vs, llc_data->sapi->vr, cr_bit, frmr_reason); PFREE (ll_unitdata_ind); break; case U_ABM: u_send_llgmm_status_ind (LLGMM_ERRCS_FRMR_COND_REEST); SET_STATE (U, U_LOCAL_ESTABLISHMENT); /* * Set bit W4 in frmr_reason to indicate ABM mode. */ frmr_reason |= FRMR_W4; u_send_frmr (ll_unitdata_ind, pdu_type, frmr_ctrl_length, llc_data->sapi->vs, llc_data->sapi->vr, cr_bit, frmr_reason); sig_u_llme_abmrel_ind(); PFREE (ll_unitdata_ind); llc_data->u->retransmission_counter = 0; /* * Send LL_ESTABLISH_IND after successful establishment. */ llc_data->u->ind_cnf_establishment = IND_ESTABLISHMENT; /* * Re-establishment procedure: send GRLC_DATA_REQ (SABM), start T200. */ u_send_sabm(); break; default: PFREE (ll_unitdata_ind); TRACE_ERROR( "SIG_RX_U_FRMR_IND unexpected" ); break; } } /* sig_rx_u_frmr_ind() */ /* +------------------------------------------------------------------------------ | Function : sig_t200_u_expired_ind +------------------------------------------------------------------------------ | Description : Handles the internal signal SIG_T200_U_EXPIRED_IND | | Parameters : grlc_data_req - a valid pointer to the frame (primitive) that | is associated with the timer | +------------------------------------------------------------------------------ */ GLOBAL void sig_t200_u_expired_ind ( #ifndef LL_DESC T_LL_UNITDATA_REQ *ll_unitdesc_req, #else T_LL_UNITDESC_REQ *ll_unitdesc_req, #endif UBYTE cause, T_EXPIRY_MODE_TYPE mode ) { UBYTE u_state; TRACE_ISIG( "sig_t200_u_expired_ind" ); /* * Set TLLI for current transaction. */ llc_data->u->current_tlli = llc_data->tlli_new; u_state = GET_STATE(U); switch (u_state) { case U_LOCAL_ESTABLISHMENT: /* * First check if an L3 release requested is pendling */ if (llc_data->u->release_requested == TRUE) { /* * Do not restart timer. Send the release confirm. */ #ifdef LL_DESC llc_cl_desc3_free((T_desc3*)ll_unitdesc_req->desc_list3.first); #endif /* LL_DESC */ PFREE (ll_unitdesc_req); u_send_ll_release_cnf(); SET_STATE (U, U_ADM); } else { /* * Increment retransmission_counter. */ llc_data->u->retransmission_counter++; if (llc_data->u->retransmission_counter <= *(llc_data->n200)) { /* * T200 has to be started before the primitive is sent to TX, because * the primitive is copied by t200_start() and it may not be valid * anymore after sending to TX. */ sig_u_t200_start_req (ll_unitdesc_req, cause); sig_u_tx_data_req (ll_unitdesc_req, cause); } else /* retransmission_counter exceeds N200 */ { #ifdef LL_DESC llc_cl_desc3_free((T_desc3*)ll_unitdesc_req->desc_list3.first); #endif /* LL_DESC */ PFREE (ll_unitdesc_req); /* * Label LEST_N200 */ u_send_llgmm_status_ind (LLGMM_ERRCS_SABM_NO_PEER_RES); if (mode == EXPIRY_TIMED) { u_send_ll_release_ind (LL_RELCS_NO_PEER_RES); } else /* EXPIRY_REQUESTED */ { /* * <R.LLC.ABMEST_R.A.015> * vs. <R.LLC.ABMEST_R.A.030> */ u_send_ll_release_ind (LL_RELCS_INVALID_XID); } SET_STATE (U, U_ADM); } } break; /* U_LOCAL_ESTABLISHMENT */ case U_LOCAL_RELEASE: /* * First check if an L3 release requested is pendling */ if (llc_data->u->release_requested == TRUE) { /* * Do not restart timer. Send the release confirm. */ #ifdef LL_DESC llc_cl_desc3_free((T_desc3*)ll_unitdesc_req->desc_list3.first); #endif /* LL_DESC */ PFREE (ll_unitdesc_req); u_send_ll_release_cnf(); SET_STATE (U, U_ADM); } else { /* * Increment retransmission_counter. */ llc_data->u->retransmission_counter++; if (llc_data->u->retransmission_counter <= *(llc_data->n200)) { /* * T200 has to be started before the primitive is sent to TX, because * the primitive is copied by t200_start() and it may not be valid * anymore after sending to TX. */ sig_u_t200_start_req (ll_unitdesc_req, cause); sig_u_tx_data_req (ll_unitdesc_req, cause); } else /* retransmission_counter exceeds N200 */ { #ifdef LL_DESC llc_cl_desc3_free((T_desc3*)ll_unitdesc_req->desc_list3.first); #endif /* LL_DESC */ PFREE (ll_unitdesc_req); SET_STATE (U, U_ADM); u_send_llgmm_status_ind (LLGMM_ERRCS_DISC_NO_PEER_RES); u_send_ll_release_cnf (); } } break; case U_ADM: case U_ABM: llc_data->u->retransmission_counter++; if (llc_data->u->retransmission_counter <= *(llc_data->n200)) { /* If T200 expires and needs to send SABM the state should * be set properly */ if (u_state == U_ADM AND llc_data->u->xid_pending NEQ TRUE ) { SET_STATE (U,U_LOCAL_ESTABLISHMENT); } /* * T200 has to be started before the primitive is sent to TX, because * the primitive is copied by t200_start() and it may not be valid * anymore after sending to TX. */ sig_u_t200_start_req (ll_unitdesc_req, cause); sig_u_tx_data_req (ll_unitdesc_req, cause); /* SET_STATE (U, SAME_STATE); */ } else { #ifdef LL_DESC llc_cl_desc3_free((T_desc3*)ll_unitdesc_req->desc_list3.first); #endif /* LL_DESC */ PFREE (ll_unitdesc_req); /* * Label XIDSENT_N200 */ u_send_llgmm_status_ind (LLGMM_ERRCS_XID_NO_PEER_RES); if (llc_data->u->xid_pending) { llc_data->u->xid_pending = FALSE; } if (u_state == U_ADM) { if (llc_data->u->xid_tag_sent & (0x00000001L << XID_LAYER_3)) { if (mode == EXPIRY_TIMED) { u_send_ll_status_ind (LL_ERRCS_NO_PEER_RES); } else /* EXPIRY_REQUESTED */ { u_send_ll_status_ind (LL_ERRCS_INVALID_XID); } } /* SET_STATE (U, SAME_STATE); */ } else /* U_ABM */ { if (mode == EXPIRY_TIMED) { u_send_ll_release_ind (LL_RELCS_NO_PEER_RES); } else /* EXPIRY_REQUESTED */ { /* * <R.LLC.XIDNEG_O.A.016> * vs. <R.LLC.XIDNEG_O.A.022> */ u_send_ll_release_ind (LL_RELCS_INVALID_XID); } SET_STATE (U, U_ADM); sig_u_llme_abmrel_ind(); } } break; default: #ifdef LL_DESC llc_cl_desc3_free((T_desc3*)ll_unitdesc_req->desc_list3.first); #endif /* LL_DESC */ PFREE (ll_unitdesc_req); TRACE_ERROR( "SIG_T200_U_EXPIRED_IND unexpected" ); break; } } /* sig_t200_u_expired_ind() */ /* +------------------------------------------------------------------------------ | Function : sig_llme_u_reest_req +------------------------------------------------------------------------------ | Description : Handles the internal signal SIG_LLME_U_REEST_REQ | | Parameters : | +------------------------------------------------------------------------------ */ GLOBAL void sig_llme_u_reest_req ( void ) { TRACE_FUNCTION( "sig_llme_u_reest_req" ); switch (GET_STATE(U)) { case U_ABM: llc_data->u->retransmission_counter = 0; /* * Send LL_ESTABLISH_IND after successful re-establishment. */ llc_data->u->ind_cnf_establishment = IND_ESTABLISHMENT; SET_STATE (U, U_LOCAL_ESTABLISHMENT); /* * Send GRLC_DATA_REQ (SABM), start T200. */ u_send_sabm(); break; default: TRACE_ERROR( "SIG_LLME_U_REEST_REQ unexpected" ); break; } } /* sig_llme_u_reest_req() */ /* +------------------------------------------------------------------------------ | Function : sig_irx_u_no_frame_expected_ind +------------------------------------------------------------------------------ | Description : Handles the internal signal SIG_IRX_U_NO_FRAME_EXPECTED_IND | | Parameters : | +------------------------------------------------------------------------------ */ GLOBAL void sig_irx_u_no_frame_expected_ind ( void ) { TRACE_FUNCTION( "sig_irx_u_no_frame_expected_ind" ); switch (GET_STATE(U)) { case U_ADM: /* * An LLE shall transmit a DM resonse to any valid command received * that it cannot action: GSM 04.64 Ver 6.7.0 Chapter 6.4.1.4 * Upon receiption of an I+S frame in ADM state, the MS shall send * a DM response with F bit set 0. */ u_send_dm (0); break; case U_LOCAL_ESTABLISHMENT: case U_ESTABLISH_RES_PENDING: case U_REMOTE_ESTABLISHMENT: /* * Ignore S- and I/S-frames received while ABM establishment. Do * not send any response: GSM 04.64 Ver 6.7.0 Chapter 8.5.1.1 */ break; case U_LOCAL_RELEASE: /* * Ignore S- and I/S-frames received while ABM termination. Do * not send any response: GSM 04.64 Ver 6.7.0 Chapter 8.5.2.1 */ break; case U_ABM: default: TRACE_ERROR( "SIG_IRX_U_NO_FRAME_EXPECTED_IND unexpected" ); break; } } /* sig_irx_u_no_frame_expected_ind() */