489 lines
19 KiB
C
489 lines
19 KiB
C
/************************************************************************/
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/* SISCO SOFTWARE MODULE HEADER *****************************************/
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/************************************************************************/
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/* (c) Copyright Systems Integration Specialists Company, Inc., */
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/* 1997-2002, All Rights Reserved */
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/* */
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/* PROPRIETARY AND CONFIDENTIAL */
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/* */
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/* MODULE NAME : copp_dec.c */
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/* PRODUCT(S) : MOSI Stack (over TP4) */
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/* */
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/* MODULE DESCRIPTION : */
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/* This file implements decoding of most confirm/indication*/
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/* functions. */
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/* */
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/* For information see the: */
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/* ISO 8822 "Information processing systems - Open Systems */
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/* Interconnection - Connection oriented presentation service */
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/* definition. */
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/* ISO 8823 "Information processing systems - Open Systems */
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/* Interconnection - Connection oriented presentation protocol */
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/* specification. */
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/* */
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/* */
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/* GLOBAL FUNCTIONS DEFINED IN THIS MODULE : */
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/* */
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/* u_cosp_bind_cnf */
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/* u_cosp_unbind_cnf */
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/* */
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/* u_cosp_rel_cnf_pos */
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/* u_cosp_rel_ind */
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/* u_cosp_p_abort_ind */
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/* u_cosp_data_ind */
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/* */
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/* */
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/* MODIFICATION LOG : */
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/* Date Who Rev Comments */
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/* -------- --- ------ ------------------------------------------- */
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/* 02/26/09 JRB 12 Fix to handle PDV len=0 or User-data len=0. */
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/* 04/28/08 GLB 11 Removed CALLED_ONLY and CALLING_ONLY */
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/* 01/02/02 JRB 10 Converted to use ASN1R (re-entrant ASN1) */
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/* 04/24/01 JRB 09 Allow octet-aligned PDV. Don't think it's */
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/* legal but some stacks (ONE?) may use it. */
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/* 02/21/01 JRB 08 Fix previous change. Was checking wrong byte */
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/* in PDU for Indef Len. Use global flag instead*/
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/* 12/20/00 JRB 07 asn1_skip_elmnt doesn't work for indef len */
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/* encoding. Use "parse_next" instead. */
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/* 08/13/98 JRB 06 Lint cleanup. */
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/* 03/18/98 JRB 05 Use defines (not variables) for ASN1 errors. */
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/* 02/20/98 JRB 04 Chg abort_reason & event_id to ST_INT8. */
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/* 12/22/97 JRB 03 Use ST_INT8. */
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/* 05/27/97 JRB 7.00 MMSEASE 7.0 release. */
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/* 03/19/97 JRB 02 Add "CALLING" support. General cleanup. */
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/* 02/27/97 JRB 01 Created */
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/************************************************************************/
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#ifdef DEBUG_SISCO
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static char *thisFileName = __FILE__;
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#endif
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#include "glbtypes.h"
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#include "sysincs.h"
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#include "mem_chk.h"
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#include "asn1defs.h"
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#include "acse2.h"
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#include "copp.h"
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#include "cosp_usr.h"
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/* START_p_user_data used by everyone, so proto in include */
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/* START_pdv_list used by everyone, so proto in include */
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static ST_VOID decode_pdv_tsn (ASN1_DEC_CTXT *aCtx);
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static ST_VOID decode_pdv_pci (ASN1_DEC_CTXT *aCtx);
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static ST_VOID START_pdv (ASN1_DEC_CTXT *aCtx);
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static ST_VOID parse_next_done (ASN1_DEC_CTXT *aCtx);
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static ST_VOID END_pdv (ASN1_DEC_CTXT *aCtx);
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static ST_VOID END_pdv_list (ASN1_DEC_CTXT *aCtx);
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static ST_VOID END_p_user_data (ASN1_DEC_CTXT *aCtx);
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/************************************************************************/
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/* Global Variables */
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/************************************************************************/
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ST_CHAR expected_pdv_pci;
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ST_UCHAR *pdv_data_ptr;
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ST_INT pdv_data_len;
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ST_BOOLEAN p_user_data_is_outer; /* Is P-User-data outermost constr?*/
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/* SD_TRUE or SD_FALSE */
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/************************************************************************/
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/* u_cosp_bind_cnf */
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/************************************************************************/
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ST_VOID u_cosp_bind_cnf (ST_LONG user_bind_id, ST_LONG cosp_bind_id, ST_RET result)
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{
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COPP_LOG_DEC3 ("P-BIND.cnf: copp_user_bind_id =0x%08X copp_bind_id =%9ld result =%d",
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user_bind_id, cosp_bind_id, result);
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u_copp_bind_cnf (user_bind_id, cosp_bind_id, result);
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}
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/************************************************************************/
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/* u_cosp_unbind_cnf */
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/************************************************************************/
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ST_VOID u_cosp_unbind_cnf (ST_LONG user_bind_id)
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{
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COPP_LOG_DEC1 ("P-UNBIND.cnf: copp_user_bind_id =0x%08X", user_bind_id);
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u_copp_unbind_cnf (user_bind_id);
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}
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/* See "coppdcp.c" for "u_cosp_con_cnf_pos" function. */
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/* See "coppdcpr.c" for "u_cosp_con_cnf_neg" function. */
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/************************************************************************/
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/* u_cosp_rel_cnf_pos */
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/*----------------------------------------------------------------------*/
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/* This USER function is called by the SS-Provider to indicate positive */
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/* result of the release operation. */
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/* */
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/* Parameters: */
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/* acse_conn Pointer to connection info */
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/* */
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/* Return: */
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/* ST_VOID */
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/************************************************************************/
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ST_VOID u_cosp_rel_cnf_pos (ACSE_CONN *acse_conn)
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{
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ST_INT8 abort_reason;
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ASN1_DEC_CTXT localDecCtx; /* For readability, use "aCtx" to access this.*/
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ASN1_DEC_CTXT *aCtx = &localDecCtx;
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memset (aCtx, 0, sizeof (ASN1_DEC_CTXT)); /* CRITICAL: start clean */
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if (acse_conn->copp_state != COPP_STATE_CONNECTED)
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{
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COPP_LOG_ERR1 ("COPP-ERROR: Cannot process S-RELEASE.cnf+ (Illegal state=%d)",
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acse_conn->copp_state);
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return;
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}
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aCtx->asn1r_decode_method = ASN1_TAG_METHOD; /* Use asn1_tag method for decoding. */
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aCtx->asn1r_decode_done_fun = asn1r_done_err; /* done function = error fun */
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aCtx->asn1r_err_fun = NULL; /* set up error detected fun */
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/* Clean out old stuff from structure. */
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decode_acse_conn = acse_conn; /* Save in global so asn1r_decode_asn1 (aCtx, */
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/* can fill it in. */
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/* Set the PCI to be used during P-User-Data decode. */
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expected_pdv_pci = decode_acse_conn->pciacse;
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p_user_data_is_outer = SD_TRUE; /* P-User-data IS outermost constr. */
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/* CRITICAL: Init APDU ptr & len. Changed only if APDU found in msg. */
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acse_conn->apdu_ptr = NULL;
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acse_conn->apdu_len = 0;
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/* CRITICAL: Init global PDV ptr & len. Changed only if PDV found in msg.*/
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pdv_data_ptr = NULL;
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pdv_data_len = 0;
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/* Call 'asn1r_decode_asn1 (aCtx,' to parse the message. */
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ASN1R_TAG_ADD (aCtx, APP|CONSTR,1,START_p_user_data);
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asn1r_decode_asn1 (aCtx, acse_conn->ppdu_ptr,acse_conn->ppdu_len);
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if (aCtx->asn1r_pdu_dec_err != NO_DECODE_ERR)
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{
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COPP_LOG_ERR1 ("COPP-ERROR: ASN.1 decode of S-Release.cnf failed, err=%d", aCtx->asn1r_pdu_dec_err);
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abort_reason = 1; /* unrecognized-ppdu */
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/* Don't send ARP PPDU. COSP already thinks we're released. */
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/* Pass P-P-Abort.ind to COPP-user. */
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u_copp_p_abort_ind (acse_conn, abort_reason);
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}
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else
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{
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COPP_LOG_DEC2 ("P-RELEASE.cnf+: acse_conn_id =0x%08X user_conn_id =%4ld",
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acse_conn, acse_conn->user_conn_id);
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COPP_LOG_DECC1 ("User data length: %d", acse_conn->apdu_len);
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COPP_LOG_DECH (acse_conn->apdu_len, acse_conn->apdu_ptr);
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if (acse_conn->cr)
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{
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acse_conn->cr = SD_FALSE;
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acse_conn->rl = SD_FALSE; /* and stay in COPP_STATE_CONNECTED */
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}
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else
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acse_conn->copp_state = COPP_STATE_IDLE;
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u_copp_rel_cnf_pos (acse_conn);
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}
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}
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/* See "coppdcp.c" for "u_cosp_con_ind" function. */
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/************************************************************************/
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/* u_cosp_rel_ind */
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/*----------------------------------------------------------------------*/
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/* This USER function is called by the SS-Provider to indicate that a */
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/* remote node wishes to release a connection. */
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/* */
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/* Parameters: */
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/* ACSE_CONN *acse_conn Pointer to connection info */
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/* */
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/* Return: */
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/* ST_VOID */
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/************************************************************************/
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ST_VOID u_cosp_rel_ind (ACSE_CONN *acse_conn)
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{
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ST_INT8 abort_reason;
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ST_INT8 event_id;
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ASN1_DEC_CTXT localDecCtx; /* For readability, use "aCtx" to access this.*/
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ASN1_DEC_CTXT *aCtx = &localDecCtx;
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memset (aCtx, 0, sizeof (ASN1_DEC_CTXT)); /* CRITICAL: start clean */
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if (acse_conn->copp_state != COPP_STATE_CONNECTED)
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{
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COPP_LOG_ERR1 ("COPP-ERROR: Cannot process S-RELEASE.ind (Illegal state=%d)",
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acse_conn->copp_state);
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return;
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}
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/* Set release collision flags. */
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if (acse_conn->rl)
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acse_conn->cr = SD_TRUE;
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acse_conn->rl = SD_TRUE;
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aCtx->asn1r_decode_method = ASN1_TAG_METHOD; /* Use asn1_tag method for decoding. */
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aCtx->asn1r_decode_done_fun = asn1r_done_err; /* done function = error fun */
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aCtx->asn1r_err_fun = NULL; /* set up error detected fun */
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/* Clean out old stuff from structure. */
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decode_acse_conn = acse_conn; /* Save in global so asn1r_decode_asn1 (aCtx, */
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/* can fill it in. */
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/* Set the PCI to be used during P-User-Data decode. */
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expected_pdv_pci = decode_acse_conn->pciacse;
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p_user_data_is_outer = SD_TRUE; /* P-User-data IS outermost constr. */
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/* CRITICAL: Init APDU ptr & len. Changed only if APDU found in msg. */
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acse_conn->apdu_ptr = NULL;
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acse_conn->apdu_len = 0;
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/* CRITICAL: Init global PDV ptr & len. Changed only if PDV found in msg.*/
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pdv_data_ptr = NULL;
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pdv_data_len = 0;
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/* Call 'asn1r_decode_asn1 (aCtx,' to parse the message. */
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ASN1R_TAG_ADD (aCtx, APP|CONSTR,1,START_p_user_data);
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asn1r_decode_asn1 (aCtx, acse_conn->ppdu_ptr,acse_conn->ppdu_len);
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if (aCtx->asn1r_pdu_dec_err != NO_DECODE_ERR)
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{
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COPP_LOG_ERR1 ("COPP-ERROR: ASN.1 decode of S-Release.ind failed, err=%d", aCtx->asn1r_pdu_dec_err);
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acse_conn->copp_state = COPP_STATE_IDLE;
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abort_reason = 1; /* unrecognized-ppdu */
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event_id = 14; /* s-release-indication */
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/* Encode and send ARP PPDU. */
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copp_p_abort_req (acse_conn, abort_reason, event_id);
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/* Pass P-P-Abort.ind to COPP-user. */
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u_copp_p_abort_ind (acse_conn, abort_reason);
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}
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else
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{
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COPP_LOG_DEC2 ("P-RELEASE.ind: acse_conn_id =0x%08X user_conn_id =%4ld",
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acse_conn, acse_conn->user_conn_id);
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COPP_LOG_DECC1 ("User data length: %d", acse_conn->apdu_len);
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COPP_LOG_DECH (acse_conn->apdu_len, acse_conn->apdu_ptr);
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u_copp_rel_ind (acse_conn);
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}
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}
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/************************************************************************/
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/* u_cosp_p_abort_ind */
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/*----------------------------------------------------------------------*/
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/* This USER function is called by the SS-Provider to indicate that a */
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/* connection has been aborted by SS-provider (local or remote). */
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/* */
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/* Parameters: */
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/* ACSE_CONN *acse_con Pointer to connection info */
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/* ST_INT reason see def reasons COSP_P_AB_IND_... above */
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/* */
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/* Return: */
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/* ST_VOID */
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/************************************************************************/
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ST_VOID u_cosp_p_abort_ind (ACSE_CONN *acse_conn, ST_INT reason)
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{
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if (acse_conn->copp_state == COPP_STATE_IDLE)
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{
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COPP_LOG_ERR1 ("COPP-ERROR: Cannot process S-P-ABORT.ind (Illegal state=%d)",
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acse_conn->copp_state);
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return;
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}
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COPP_LOG_DEC3 ("P-P-ABORT.ind: acse_conn_id =0x%08X user_conn_id =%4ld reason =%d",
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acse_conn, acse_conn->user_conn_id, reason + 0x100);
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acse_conn->copp_state = COPP_STATE_IDLE;
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u_copp_p_abort_ind (acse_conn, reason + 0x100);
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}
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/************************************************************************/
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/* u_cosp_data_ind */
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/*----------------------------------------------------------------------*/
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/* This USER function is called by the SS-Provider to indicate that a */
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/* data SPDU has been received. */
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/* */
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/* Parameters: */
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/* ACSE_CONN *acse_conn Pointer to connection info */
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/* */
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/* Return: */
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/* ST_VOID */
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/************************************************************************/
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ST_VOID u_cosp_data_ind (ACSE_CONN *acse_conn)
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{
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ST_INT8 abort_reason;
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ST_INT8 event_id;
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ASN1_DEC_CTXT localDecCtx; /* For readability, use "aCtx" to access this.*/
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ASN1_DEC_CTXT *aCtx = &localDecCtx;
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memset (aCtx, 0, sizeof (ASN1_DEC_CTXT)); /* CRITICAL: start clean */
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if (acse_conn->copp_state != COPP_STATE_CONNECTED)
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{
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COPP_LOG_ERR1 ("COPP-ERROR: Cannot process S-DATA.ind (Illegal state=%d)",
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acse_conn->copp_state);
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return;
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}
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aCtx->asn1r_decode_method = ASN1_TAG_METHOD; /* Use asn1_tag method for decoding. */
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aCtx->asn1r_decode_done_fun = asn1r_done_err; /* done function = error fun */
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aCtx->asn1r_err_fun = NULL; /* set up error detected fun */
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/* Clean out old stuff from structure. */
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decode_acse_conn = acse_conn; /* Save in global so asn1r_decode_asn1 (aCtx, */
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/* can fill it in. */
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/* Set the PCI to be used during P-User-Data decode. */
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expected_pdv_pci = decode_acse_conn->pcimms;
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p_user_data_is_outer = SD_TRUE; /* P-User-data IS outermost constr. */
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/* CRITICAL: Init APDU ptr & len. Changed only if APDU found in msg. */
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acse_conn->apdu_ptr = NULL;
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acse_conn->apdu_len = 0;
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/* CRITICAL: Init global PDV ptr & len. Changed only if PDV found in msg.*/
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pdv_data_ptr = NULL;
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pdv_data_len = 0;
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/* Call 'asn1r_decode_asn1 (aCtx,' to parse the message. */
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ASN1R_TAG_ADD (aCtx, APP|CONSTR,1,START_p_user_data);
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asn1r_decode_asn1 (aCtx, acse_conn->ppdu_ptr,acse_conn->ppdu_len);
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if (aCtx->asn1r_pdu_dec_err != NO_DECODE_ERR)
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{
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COPP_LOG_ERR1 ("COPP-ERROR: ASN.1 decode of S-Data.ind failed, err=%d", aCtx->asn1r_pdu_dec_err);
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abort_reason = 1; /* unrecognized-ppdu */
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event_id = -1; /* Unlisted */
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/* Encode and send ARP PPDU. */
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copp_p_abort_req (acse_conn, abort_reason, event_id);
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/* Pass P-P-Abort.ind to COPP-user. */
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u_copp_p_abort_ind (acse_conn, abort_reason);
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}
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else
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{
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COPP_LOG_DEC2 ("P-DATA.ind: acse_conn_id =0x%08X user_conn_id =%4ld",
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acse_conn, acse_conn->user_conn_id);
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COPP_LOG_DECC1 ("User data length: %d", acse_conn->apdu_len);
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COPP_LOG_DECH (acse_conn->apdu_len, acse_conn->apdu_ptr);
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u_copp_data_ind (acse_conn);
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}
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}
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/*======================================================*/
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/* ASN.1 DECODE FUNCTIONS FOR P-USER-DATA */
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/* */
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/* Used for CP, CPA, CPR, ARU, DT, or REL decode. */
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/*======================================================*/
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/************************************************************************/
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/* START_p_user_data */
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/************************************************************************/
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ST_VOID START_p_user_data (ASN1_DEC_CTXT *aCtx)
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{
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ASN1R_TAG_ADD (aCtx, UNI|CONSTR,SEQ_CODE,START_pdv_list);
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aCtx->asn1r_c_done_fun [aCtx->asn1r_msg_level] = END_p_user_data;
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}
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/************************************************************************/
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/* START_pdv_list */
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/* ACSE also uses this function to decode "EXTERNAL". Although defined */
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/* independently, it's encoding is same as "PDV-list". */
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/************************************************************************/
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ST_VOID START_pdv_list (ASN1_DEC_CTXT *aCtx)
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{
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ASN1R_TAG_ADD (aCtx, UNI,OBJ_ID_CODE,decode_pdv_tsn);
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ASN1R_TAG_ADD (aCtx, UNI,INT_CODE,decode_pdv_pci);
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aCtx->asn1r_c_done_fun [aCtx->asn1r_msg_level] = END_pdv_list;
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}
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/************************************************************************/
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/* decode_pdv_tsn */
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/************************************************************************/
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static ST_VOID decode_pdv_tsn (ASN1_DEC_CTXT *aCtx)
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{
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MMS_OBJ_ID tsn;
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if (asn1r_get_objid (aCtx, tsn.comps,&tsn.num_comps))
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{
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asn1r_set_dec_err (aCtx, ASN1E_INVALID_BOOLEAN);
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return;
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}
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if (asn1_objidcmp (&tsn, &asn1_obj_id) != 0)
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{ /* TSN better be ASN1 */
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asn1r_set_dec_err (aCtx, ASN1E_INVALID_BITSTR);
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return;
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}
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ASN1R_TAG_ADD (aCtx, UNI,INT_CODE,decode_pdv_pci);
|
|
}
|
|
/************************************************************************/
|
|
/* decode_pdv_pci */
|
|
/************************************************************************/
|
|
static ST_VOID decode_pdv_pci (ASN1_DEC_CTXT *aCtx)
|
|
{
|
|
ST_INT8 pci;
|
|
|
|
if (asn1r_get_i8 (aCtx, &pci))
|
|
{
|
|
asn1r_set_dec_err (aCtx, ASN1E_INVALID_BOOLEAN);
|
|
return;
|
|
}
|
|
if (pci != expected_pdv_pci)
|
|
{ /* Not the pci we're expecting. */
|
|
asn1r_set_dec_err (aCtx, ASN1E_INVALID_BITSTR);
|
|
return;
|
|
}
|
|
ASN1R_TAG_ADD (aCtx, CTX|CONSTR,0,START_pdv); /* Must be single-ASN1-type */
|
|
/* Octet-aligned doesn't appear to be legal, but some stacks (ONE?) */
|
|
/* may use it. To be friendly, let's accept it. */
|
|
ASN1R_TAG_ADD (aCtx, CTX,1,START_pdv); /* Allow octet-aligned */
|
|
}
|
|
/************************************************************************/
|
|
/* START_pdv */
|
|
/************************************************************************/
|
|
static ST_VOID START_pdv (ASN1_DEC_CTXT *aCtx)
|
|
{
|
|
/* Should now point to PDV data. Save until decode done. */
|
|
pdv_data_ptr = aCtx->asn1r_field_ptr;
|
|
|
|
/* If this is indefinite length encoding, use "asn1r_parse_next (aCtx,". */
|
|
/* If "normal" encoding, use "asn1_skip_elmnt" (faster). */
|
|
if (aCtx->asn1r_indef_flag)
|
|
{ /* indefinite length encoding */
|
|
aCtx->asn1r_c_done_fun [aCtx->asn1r_msg_level] = END_pdv;
|
|
asn1r_parse_next (aCtx, parse_next_done);
|
|
}
|
|
else
|
|
{ /* "normal" encoding */
|
|
pdv_data_len = aCtx->asn1r_elmnt_len;
|
|
asn1_skip_elmnt (aCtx); /* Done decoding PPDU. Let ACSE decode rest. */
|
|
}
|
|
}
|
|
/************************************************************************/
|
|
/* parse_next_done */
|
|
/* Only used for indefinite length encoding. */
|
|
/************************************************************************/
|
|
static ST_VOID parse_next_done (ASN1_DEC_CTXT *aCtx)
|
|
{ /* called when "asn1r_parse_next (aCtx," is done */
|
|
}
|
|
/************************************************************************/
|
|
/* END_pdv */
|
|
/* Only used for indefinite length encoding. */
|
|
/************************************************************************/
|
|
static ST_VOID END_pdv (ASN1_DEC_CTXT *aCtx)
|
|
{
|
|
pdv_data_len = aCtx->asn1r_field_ptr - pdv_data_ptr - 2; /* -2 strips 00 00*/
|
|
}
|
|
/************************************************************************/
|
|
/* END_pdv_list */
|
|
/************************************************************************/
|
|
static ST_VOID END_pdv_list (ASN1_DEC_CTXT *aCtx)
|
|
{
|
|
}
|
|
/************************************************************************/
|
|
/* END_p_user_data */
|
|
/************************************************************************/
|
|
static ST_VOID END_p_user_data (ASN1_DEC_CTXT *aCtx)
|
|
{
|
|
decode_acse_conn->apdu_ptr = pdv_data_ptr;
|
|
decode_acse_conn->apdu_len = pdv_data_len;
|
|
if (p_user_data_is_outer) /* Is P-User-data outermost constr? */
|
|
aCtx->asn1r_decode_done_fun = NULL; /* done decoding */
|
|
}
|
|
|