FreeBSD-5.3/sys/netatm/uni/unisig_decode.c
/*
* ===================================
* HARP | Host ATM Research Platform
* ===================================
*
*
* This Host ATM Research Platform ("HARP") file (the "Software") is
* made available by Network Computing Services, Inc. ("NetworkCS")
* "AS IS". NetworkCS does not provide maintenance, improvements or
* support of any kind.
*
* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
* In no event shall NetworkCS be responsible for any damages, including
* but not limited to consequential damages, arising from or relating to
* any use of the Software or related support.
*
* Copyright 1994-1998 Network Computing Services, Inc.
*
* Copies of this Software may be made, however, the above copyright
* notice must be reproduced on all copies.
*/
/*
* ATM Forum UNI 3.0/3.1 Signalling Manager
* ----------------------------------------
*
* Message formatting module
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/netatm/uni/unisig_decode.c,v 1.16 2003/07/23 14:28:57 harti Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <netatm/port.h>
#include <netatm/queue.h>
#include <netatm/atm.h>
#include <netatm/atm_sys.h>
#include <netatm/atm_sap.h>
#include <netatm/atm_cm.h>
#include <netatm/atm_if.h>
#include <netatm/atm_vc.h>
#include <netatm/atm_sigmgr.h>
#include <netatm/atm_stack.h>
#include <netatm/atm_pcb.h>
#include <netatm/atm_var.h>
#include <netatm/uni/unisig_var.h>
#include <netatm/uni/unisig_msg.h>
#include <netatm/uni/unisig_mbuf.h>
#include <netatm/uni/unisig_decode.h>
#define ALLOC_IE(ie) do { \
(ie) = uma_zalloc(unisig_ie_zone, M_NOWAIT | M_ZERO); \
if ((ie) == NULL) \
return (ENOMEM); \
} while (0)
/*
* Local functions
*/
static int usf_dec_ie(struct usfmt *, struct unisig_msg *, struct ie_generic *);
static int usf_dec_ie_hdr(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_aalp(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_clrt(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_bbcp(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_bhli(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_blli(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_clst(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_cdad(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_cdsa(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_cgad(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_cgsa(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_caus(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_cnid(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_qosp(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_brpi(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_rsti(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_bsdc(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_trnt(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_uimp(struct usfmt *, struct ie_generic *);
static int usf_dec_ie_ident(struct usfmt *, struct ie_generic *,
struct ie_decode_tbl *);
static int usf_dec_atm_addr(struct usfmt *, Atm_addr *, int);
/*
* Table associating IE type with IE vector index
*/
u_char unisig_ie_ident_vec[] = {
UNI_IE_AALP,
UNI_IE_CLRT,
UNI_IE_BBCP,
UNI_IE_BHLI,
UNI_IE_BLLI,
UNI_IE_CLST,
UNI_IE_CDAD,
UNI_IE_CDSA,
UNI_IE_CGAD,
UNI_IE_CGSA,
UNI_IE_CAUS,
UNI_IE_CNID,
UNI_IE_QOSP,
UNI_IE_BRPI,
UNI_IE_RSTI,
UNI_IE_BLSH,
UNI_IE_BNSH,
UNI_IE_BSDC,
UNI_IE_TRNT,
UNI_IE_EPRF,
UNI_IE_EPST
};
/*
* Tables specifying which IEs are mandatory, optional, and
* not allowed for each Q.2931 message type
*/
static u_char uni_calp_ie_tbl[] = {
IE_NA, /* ATM AAL Parameters */
IE_NA, /* ATM User Cell Rate */
IE_NA, /* Broadband Bearer Capability */
IE_NA, /* Broadband High Layer Information */
IE_NA, /* Broadband Low Layer Information */
IE_NA, /* Call State */
IE_NA, /* Called Party Number */
IE_NA, /* Called Party Subaddress */
IE_NA, /* Calling Party Number */
IE_NA, /* Calling Party Subaddress */
IE_NA, /* Cause */
IE_OPT, /* Connection Identifier */
IE_NA, /* Quality of Service Parameters */
IE_NA, /* Broadband Repeat Indicator */
IE_NA, /* Restart Indicator */
IE_NA, /* Broadband Locking Shift */
IE_NA, /* Broadband Non-locking Shift */
IE_NA, /* Broadband Sending Complete */
IE_NA, /* Transit Net */
IE_OPT, /* Endpoint Reference */
IE_NA /* Endpoint State */
};
static u_char uni_conn_ie_tbl[] = {
IE_OPT, /* ATM AAL Parameters */
IE_NA, /* ATM User Cell Rate */
IE_NA, /* Broadband Bearer Capability */
IE_NA, /* Broadband High Layer Information */
IE_OPT, /* Broadband Low Layer Information */
IE_NA, /* Call State */
IE_NA, /* Called Party Number */
IE_NA, /* Called Party Subaddress */
IE_NA, /* Calling Party Number */
IE_NA, /* Calling Party Subaddress */
IE_NA, /* Cause */
IE_OPT, /* Connection Identifier */
IE_NA, /* Quality of Service Parameters */
IE_NA, /* Broadband Repeat Indicator */
IE_NA, /* Restart Indicator */
IE_NA, /* Broadband Locking Shift */
IE_NA, /* Broadband Non-locking Shift */
IE_NA, /* Broadband Sending Complete */
IE_NA, /* Transit Net */
IE_OPT, /* Endpoint Reference */
IE_NA /* Endpoint State */
};
static u_char uni_cack_ie_tbl[] = {
IE_NA, /* ATM AAL Parameters */
IE_NA, /* ATM User Cell Rate */
IE_NA, /* Broadband Bearer Capability */
IE_NA, /* Broadband High Layer Information */
IE_NA, /* Broadband Low Layer Information */
IE_NA, /* Call State */
IE_NA, /* Called Party Number */
IE_NA, /* Called Party Subaddress */
IE_NA, /* Calling Party Number */
IE_NA, /* Calling Party Subaddress */
IE_NA, /* Cause */
IE_NA, /* Connection Identifier */
IE_NA, /* Quality of Service Parameters */
IE_NA, /* Broadband Repeat Indicator */
IE_NA, /* Restart Indicator */
IE_NA, /* Broadband Locking Shift */
IE_NA, /* Broadband Non-locking Shift */
IE_NA, /* Broadband Sending Complete */
IE_NA, /* Transit Net */
IE_NA, /* Endpoint Reference */
IE_NA /* Endpoint State */
};
static u_char uni_setu_ie_tbl[] = {
IE_MAND, /* ATM AAL Parameters (not required by
UNI 3.0) */
IE_MAND, /* ATM User Cell Rate */
IE_MAND, /* Broadband Bearer Capability */
IE_OPT, /* Broadband High Layer Information */
IE_MAND, /* Broadband Low Layer Information (not required by UNI 3.0 */
IE_NA, /* Call State */
IE_MAND, /* Called Party Number */
IE_OPT, /* Called Party Subaddress */
IE_OPT, /* Calling Party Number */
IE_OPT, /* Calling Party Subaddress */
IE_NA, /* Cause */
IE_MAND, /* Connection Identifier */
IE_MAND, /* Quality of Service Parameters */
IE_OPT, /* Broadband Repeat Indicator */
IE_NA, /* Restart Indicator */
IE_NA, /* Broadband Locking Shift */
IE_NA, /* Broadband Non-locking Shift */
IE_OPT, /* Broadband Sending Complete */
IE_NA, /* Transit Net */
IE_OPT, /* Endpoint Reference */
IE_NA /* Endpoint State */
};
static u_char uni_rlse_ie_tbl[] = {
IE_NA, /* ATM AAL Parameters */
IE_NA, /* ATM User Cell Rate */
IE_NA, /* Broadband Bearer Capability */
IE_NA, /* Broadband High Layer Information */
IE_NA, /* Broadband Low Layer Information */
IE_NA, /* Call State */
IE_NA, /* Called Party Number */
IE_NA, /* Called Party Subaddress */
IE_NA, /* Calling Party Number */
IE_NA, /* Calling Party Subaddress */
IE_MAND, /* Cause */
IE_NA, /* Connection Identifier */
IE_NA, /* Quality of Service Parameters */
IE_NA, /* Broadband Repeat Indicator */
IE_NA, /* Restart Indicator */
IE_NA, /* Broadband Locking Shift */
IE_NA, /* Broadband Non-locking Shift */
IE_NA, /* Broadband Sending Complete */
IE_NA, /* Transit Net */
IE_NA, /* Endpoint Reference */
IE_NA /* Endpoint State */
};
static u_char uni_rlsc_ie_tbl[] = {
IE_NA, /* ATM AAL Parameters */
IE_NA, /* ATM User Cell Rate */
IE_NA, /* Broadband Bearer Capability */
IE_NA, /* Broadband High Layer Information */
IE_NA, /* Broadband Low Layer Information */
IE_NA, /* Call State */
IE_NA, /* Called Party Number */
IE_NA, /* Called Party Subaddress */
IE_NA, /* Calling Party Number */
IE_NA, /* Calling Party Subaddress */
IE_MAND, /* Cause */
IE_NA, /* Connection Identifier */
IE_NA, /* Quality of Service Parameters */
IE_NA, /* Broadband Repeat Indicator */
IE_NA, /* Restart Indicator */
IE_NA, /* Broadband Locking Shift */
IE_NA, /* Broadband Non-locking Shift */
IE_NA, /* Broadband Sending Complete */
IE_NA, /* Transit Net */
IE_NA, /* Endpoint Reference */
IE_NA /* Endpoint State */
};
static u_char uni_rstr_ie_tbl[] = {
IE_NA, /* ATM AAL Parameters */
IE_NA, /* ATM User Cell Rate */
IE_NA, /* Broadband Bearer Capability */
IE_NA, /* Broadband High Layer Information */
IE_NA, /* Broadband Low Layer Information */
IE_NA, /* Call State */
IE_NA, /* Called Party Number */
IE_NA, /* Called Party Subaddress */
IE_NA, /* Calling Party Number */
IE_NA, /* Calling Party Subaddress */
IE_NA, /* Cause */
IE_OPT, /* Connection Identifier */
IE_NA, /* Quality of Service Parameters */
IE_NA, /* Broadband Repeat Indicator */
IE_MAND, /* Restart Indicator */
IE_NA, /* Broadband Locking Shift */
IE_NA, /* Broadband Non-locking Shift */
IE_NA, /* Broadband Sending Complete */
IE_NA, /* Transit Net */
IE_NA, /* Endpoint Reference */
IE_NA /* Endpoint State */
};
static u_char uni_rsta_ie_tbl[] = {
IE_NA, /* ATM AAL Parameters */
IE_NA, /* ATM User Cell Rate */
IE_NA, /* Broadband Bearer Capability */
IE_NA, /* Broadband High Layer Information */
IE_NA, /* Broadband Low Layer Information */
IE_NA, /* Call State */
IE_NA, /* Called Party Number */
IE_NA, /* Called Party Subaddress */
IE_NA, /* Calling Party Number */
IE_NA, /* Calling Party Subaddress */
IE_NA, /* Cause */
IE_OPT, /* Connection Identifier */
IE_NA, /* Quality of Service Parameters */
IE_NA, /* Broadband Repeat Indicator */
IE_MAND, /* Restart Indicator */
IE_NA, /* Broadband Locking Shift */
IE_NA, /* Broadband Non-locking Shift */
IE_NA, /* Broadband Sending Complete */
IE_NA, /* Transit Net */
IE_NA, /* Endpoint Reference */
IE_NA /* Endpoint State */
};
static u_char uni_stat_ie_tbl[] = {
IE_NA, /* ATM AAL Parameters */
IE_NA, /* ATM User Cell Rate */
IE_NA, /* Broadband Bearer Capability */
IE_NA, /* Broadband High Layer Information */
IE_NA, /* Broadband Low Layer Information */
IE_MAND, /* Call State */
IE_NA, /* Called Party Number */
IE_NA, /* Called Party Subaddress */
IE_NA, /* Calling Party Number */
IE_NA, /* Calling Party Subaddress */
IE_MAND, /* Cause */
IE_NA, /* Connection Identifier */
IE_NA, /* Quality of Service Parameters */
IE_NA, /* Broadband Repeat Indicator */
IE_NA, /* Restart Indicator */
IE_NA, /* Broadband Locking Shift */
IE_NA, /* Broadband Non-locking Shift */
IE_NA, /* Broadband Sending Complete */
IE_NA, /* Transit Net */
IE_OPT, /* Endpoint Reference */
IE_OPT /* Endpoint State */
};
static u_char uni_senq_ie_tbl[] = {
IE_NA, /* ATM AAL Parameters */
IE_NA, /* ATM User Cell Rate */
IE_NA, /* Broadband Bearer Capability */
IE_NA, /* Broadband High Layer Information */
IE_NA, /* Broadband Low Layer Information */
IE_NA, /* Call State */
IE_NA, /* Called Party Number */
IE_NA, /* Called Party Subaddress */
IE_NA, /* Calling Party Number */
IE_NA, /* Calling Party Subaddress */
IE_NA, /* Cause */
IE_NA, /* Connection Identifier */
IE_NA, /* Quality of Service Parameters */
IE_NA, /* Broadband Repeat Indicator */
IE_NA, /* Restart Indicator */
IE_NA, /* Broadband Locking Shift */
IE_NA, /* Broadband Non-locking Shift */
IE_NA, /* Broadband Sending Complete */
IE_NA, /* Transit Net */
IE_OPT, /* Endpoint Reference */
IE_NA /* Endpoint State */
};
static u_char uni_addp_ie_tbl[] = {
IE_OPT, /* ATM AAL Parameters */
IE_NA, /* ATM User Cell Rate */
IE_NA, /* Broadband Bearer Capability */
IE_OPT, /* Broadband High Layer Information */
IE_OPT, /* Broadband Low Layer Information */
IE_NA, /* Call State */
IE_MAND, /* Called Party Number */
IE_OPT, /* Called Party Subaddress */
IE_OPT, /* Calling Party Number */
IE_OPT, /* Calling Party Subaddress */
IE_NA, /* Cause */
IE_NA, /* Connection Identifier */
IE_NA, /* Quality of Service Parameters */
IE_NA, /* Broadband Repeat Indicator */
IE_NA, /* Restart Indicator */
IE_NA, /* Broadband Locking Shift */
IE_NA, /* Broadband Non-locking Shift */
IE_OPT, /* Broadband Sending Complete */
IE_NA, /* Transit Net */
IE_MAND, /* Endpoint Reference */
IE_NA /* Endpoint State */
};
static u_char uni_adpa_ie_tbl[] = {
IE_NA, /* ATM AAL Parameters */
IE_NA, /* ATM User Cell Rate */
IE_NA, /* Broadband Bearer Capability */
IE_NA, /* Broadband High Layer Information */
IE_NA, /* Broadband Low Layer Information */
IE_NA, /* Call State */
IE_NA, /* Called Party Number */
IE_NA, /* Called Party Subaddress */
IE_NA, /* Calling Party Number */
IE_NA, /* Calling Party Subaddress */
IE_NA, /* Cause */
IE_NA, /* Connection Identifier */
IE_NA, /* Quality of Service Parameters */
IE_NA, /* Broadband Repeat Indicator */
IE_NA, /* Restart Indicator */
IE_NA, /* Broadband Locking Shift */
IE_NA, /* Broadband Non-locking Shift */
IE_NA, /* Broadband Sending Complete */
IE_NA, /* Transit Net */
IE_MAND, /* Endpoint Reference */
IE_NA /* Endpoint State */
};
static u_char uni_adpr_ie_tbl[] = {
IE_NA, /* ATM AAL Parameters */
IE_NA, /* ATM User Cell Rate */
IE_NA, /* Broadband Bearer Capability */
IE_NA, /* Broadband High Layer Information */
IE_NA, /* Broadband Low Layer Information */
IE_NA, /* Call State */
IE_NA, /* Called Party Number */
IE_NA, /* Called Party Subaddress */
IE_NA, /* Calling Party Number */
IE_NA, /* Calling Party Subaddress */
IE_MAND, /* Cause */
IE_NA, /* Connection Identifier */
IE_NA, /* Quality of Service Parameters */
IE_NA, /* Broadband Repeat Indicator */
IE_NA, /* Restart Indicator */
IE_NA, /* Broadband Locking Shift */
IE_NA, /* Broadband Non-locking Shift */
IE_NA, /* Broadband Sending Complete */
IE_NA, /* Transit Net */
IE_MAND, /* Endpoint Reference */
IE_NA /* Endpoint State */
};
static u_char uni_drpp_ie_tbl[] = {
IE_NA, /* ATM AAL Parameters */
IE_NA, /* ATM User Cell Rate */
IE_NA, /* Broadband Bearer Capability */
IE_NA, /* Broadband High Layer Information */
IE_NA, /* Broadband Low Layer Information */
IE_NA, /* Call State */
IE_NA, /* Called Party Number */
IE_NA, /* Called Party Subaddress */
IE_NA, /* Calling Party Number */
IE_NA, /* Calling Party Subaddress */
IE_MAND, /* Cause */
IE_NA, /* Connection Identifier */
IE_NA, /* Quality of Service Parameters */
IE_NA, /* Broadband Repeat Indicator */
IE_NA, /* Restart Indicator */
IE_NA, /* Broadband Locking Shift */
IE_NA, /* Broadband Non-locking Shift */
IE_NA, /* Broadband Sending Complete */
IE_NA, /* Transit Net */
IE_MAND, /* Endpoint Reference */
IE_NA /* Endpoint State */
};
static u_char uni_drpa_ie_tbl[] = {
IE_NA, /* ATM AAL Parameters */
IE_NA, /* ATM User Cell Rate */
IE_NA, /* Broadband Bearer Capability */
IE_NA, /* Broadband High Layer Information */
IE_NA, /* Broadband Low Layer Information */
IE_NA, /* Call State */
IE_NA, /* Called Party Number */
IE_NA, /* Called Party Subaddress */
IE_NA, /* Calling Party Number */
IE_NA, /* Calling Party Subaddress */
IE_OPT, /* Cause */
IE_NA, /* Connection Identifier */
IE_NA, /* Quality of Service Parameters */
IE_NA, /* Broadband Repeat Indicator */
IE_NA, /* Restart Indicator */
IE_NA, /* Broadband Locking Shift */
IE_NA, /* Broadband Non-locking Shift */
IE_NA, /* Broadband Sending Complete */
IE_NA, /* Transit Net */
IE_MAND, /* Endpoint Reference */
IE_NA /* Endpoint State */
};
/*
* Table of Q.2931 message types
*/
static struct {
u_char msg_type;
u_char *msg_ie_tbl;
} uni_msg_types[] = {
{ UNI_MSG_CALP, uni_calp_ie_tbl },
{ UNI_MSG_CONN, uni_conn_ie_tbl },
{ UNI_MSG_CACK, uni_cack_ie_tbl },
{ UNI_MSG_SETU, uni_setu_ie_tbl },
{ UNI_MSG_RLSE, uni_rlse_ie_tbl },
{ UNI_MSG_RLSC, uni_rlsc_ie_tbl },
{ UNI_MSG_RSTR, uni_rstr_ie_tbl },
{ UNI_MSG_RSTA, uni_rsta_ie_tbl },
{ UNI_MSG_STAT, uni_stat_ie_tbl },
{ UNI_MSG_SENQ, uni_senq_ie_tbl },
{ UNI_MSG_ADDP, uni_addp_ie_tbl },
{ UNI_MSG_ADPA, uni_adpa_ie_tbl },
{ UNI_MSG_ADPR, uni_adpr_ie_tbl },
{ UNI_MSG_DRPP, uni_drpp_ie_tbl },
{ UNI_MSG_DRPA, uni_drpa_ie_tbl },
};
/*
* Table of information elements
*/
static struct ie_ent ie_table[] = {
{ UNI_IE_AALP, 5, 16, UNI_MSG_IE_AALP, usf_dec_ie_aalp },
{ UNI_IE_CLRT, 0, 26, UNI_MSG_IE_CLRT, usf_dec_ie_clrt },
{ UNI_IE_BBCP, 2, 3, UNI_MSG_IE_BBCP, usf_dec_ie_bbcp },
{ UNI_IE_BHLI, 1, 9, UNI_MSG_IE_BHLI, usf_dec_ie_bhli },
{ UNI_IE_BLLI, 0, 13, UNI_MSG_IE_BLLI, usf_dec_ie_blli },
{ UNI_IE_CLST, 1, 1, UNI_MSG_IE_CLST, usf_dec_ie_clst },
{ UNI_IE_CDAD, 1, 21, UNI_MSG_IE_CDAD, usf_dec_ie_cdad },
{ UNI_IE_CDSA, 1, 21, UNI_MSG_IE_CDSA, usf_dec_ie_cdsa },
{ UNI_IE_CGAD, 1, 22, UNI_MSG_IE_CGAD, usf_dec_ie_cgad },
{ UNI_IE_CGSA, 1, 21, UNI_MSG_IE_CGSA, usf_dec_ie_cgsa },
{ UNI_IE_CAUS, 2, 30, UNI_MSG_IE_CAUS, usf_dec_ie_caus },
{ UNI_IE_CNID, 5, 5, UNI_MSG_IE_CNID, usf_dec_ie_cnid },
{ UNI_IE_QOSP, 2, 2, UNI_MSG_IE_QOSP, usf_dec_ie_qosp },
{ UNI_IE_BRPI, 1, 1, UNI_MSG_IE_BRPI, usf_dec_ie_brpi },
{ UNI_IE_RSTI, 1, 1, UNI_MSG_IE_RSTI, usf_dec_ie_rsti },
{ UNI_IE_BLSH, 1, 1, UNI_MSG_IE_ERR, usf_dec_ie_uimp },
{ UNI_IE_BNSH, 1, 1, UNI_MSG_IE_ERR, usf_dec_ie_uimp },
{ UNI_IE_BSDC, 1, 1, UNI_MSG_IE_BSDC, usf_dec_ie_bsdc },
{ UNI_IE_TRNT, 1, 5, UNI_MSG_IE_TRNT, usf_dec_ie_trnt },
{ UNI_IE_EPRF, 3, 3, UNI_MSG_IE_ERR, usf_dec_ie_uimp },
{ UNI_IE_EPST, 1, 1, UNI_MSG_IE_ERR, usf_dec_ie_uimp },
{ 0, 0, 0, 0, 0 }
};
/*
* Decoding table for AAL 1
*/
struct ie_decode_tbl ie_aal1_tbl[] = {
{ 133, 1, IE_OFF_SIZE(ie_aalp_1_subtype) },
{ 134, 1, IE_OFF_SIZE(ie_aalp_1_cbr_rate) },
{ 135, 2, IE_OFF_SIZE(ie_aalp_1_multiplier) },
{ 136, 1, IE_OFF_SIZE(ie_aalp_1_clock_recovery) },
{ 137, 1, IE_OFF_SIZE(ie_aalp_1_error_correction) },
{ 138, 1, IE_OFF_SIZE(ie_aalp_1_struct_data_tran) },
{ 139, 1, IE_OFF_SIZE(ie_aalp_1_partial_cells) },
{ 0, 0, 0, 0 }
};
/*
* Decoding table for AAL 3/4
*/
struct ie_decode_tbl ie_aal4_tbl_30[] = {
{ 140, 2, IE_OFF_SIZE(ie_aalp_4_fwd_max_sdu) },
{ 129, 2, IE_OFF_SIZE(ie_aalp_4_bkwd_max_sdu) },
{ 130, 2, IE_OFF_SIZE(ie_aalp_4_mid_range) },
{ 131, 1, IE_OFF_SIZE(ie_aalp_4_mode) },
{ 132, 1, IE_OFF_SIZE(ie_aalp_4_sscs_type) },
{ 0, 0, 0, 0 }
};
struct ie_decode_tbl ie_aal4_tbl_31[] = {
{ 140, 2, IE_OFF_SIZE(ie_aalp_4_fwd_max_sdu) },
{ 129, 2, IE_OFF_SIZE(ie_aalp_4_bkwd_max_sdu) },
{ 130, 4, IE_OFF_SIZE(ie_aalp_4_mid_range) },
{ 132, 1, IE_OFF_SIZE(ie_aalp_4_sscs_type) },
{ 0, 0, 0, 0 }
};
/*
* Decoding table for AAL 5
*/
struct ie_decode_tbl ie_aal5_tbl_30[] = {
{ 140, 2, IE_OFF_SIZE(ie_aalp_5_fwd_max_sdu) },
{ 129, 2, IE_OFF_SIZE(ie_aalp_5_bkwd_max_sdu) },
{ 131, 1, IE_OFF_SIZE(ie_aalp_5_mode) },
{ 132, 1, IE_OFF_SIZE(ie_aalp_5_sscs_type) },
{ 0, 0, 0, 0 }
};
struct ie_decode_tbl ie_aal5_tbl_31[] = {
{ 140, 2, IE_OFF_SIZE(ie_aalp_5_fwd_max_sdu) },
{ 129, 2, IE_OFF_SIZE(ie_aalp_5_bkwd_max_sdu) },
{ 132, 1, IE_OFF_SIZE(ie_aalp_5_sscs_type) },
{ 0, 0, 0, 0 }
};
/*
* Decoding table for ATM user cell rate
*/
struct ie_decode_tbl ie_clrt_tbl[] = {
{UNI_IE_CLRT_FWD_PEAK_ID, 3, IE_OFF_SIZE(ie_clrt_fwd_peak)},
{UNI_IE_CLRT_BKWD_PEAK_ID, 3, IE_OFF_SIZE(ie_clrt_bkwd_peak)},
{UNI_IE_CLRT_FWD_PEAK_01_ID, 3, IE_OFF_SIZE(ie_clrt_fwd_peak_01)},
{UNI_IE_CLRT_BKWD_PEAK_01_ID, 3, IE_OFF_SIZE(ie_clrt_bkwd_peak_01)},
{UNI_IE_CLRT_FWD_SUST_ID, 3, IE_OFF_SIZE(ie_clrt_fwd_sust)},
{UNI_IE_CLRT_BKWD_SUST_ID, 3, IE_OFF_SIZE(ie_clrt_bkwd_sust)},
{UNI_IE_CLRT_FWD_SUST_01_ID, 3, IE_OFF_SIZE(ie_clrt_fwd_sust_01)},
{UNI_IE_CLRT_BKWD_SUST_01_ID, 3, IE_OFF_SIZE(ie_clrt_bkwd_sust_01)},
{UNI_IE_CLRT_FWD_BURST_ID, 3, IE_OFF_SIZE(ie_clrt_fwd_burst)},
{UNI_IE_CLRT_BKWD_BURST_ID, 3, IE_OFF_SIZE(ie_clrt_bkwd_burst)},
{UNI_IE_CLRT_FWD_BURST_01_ID, 3, IE_OFF_SIZE(ie_clrt_fwd_burst_01)},
{UNI_IE_CLRT_BKWD_BURST_01_ID, 3, IE_OFF_SIZE(ie_clrt_bkwd_burst_01)},
{UNI_IE_CLRT_BEST_EFFORT_ID, 0, IE_OFF_SIZE(ie_clrt_best_effort)},
{UNI_IE_CLRT_TM_OPTIONS_ID, 1, IE_OFF_SIZE(ie_clrt_tm_options)},
{0, 0, 0, 0 }
};
/*
* IEs initialized to empty values
*/
struct ie_aalp ie_aalp_absent = {
T_ATM_ABSENT
};
struct ie_clrt ie_clrt_absent = {
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT
};
struct ie_bbcp ie_bbcp_absent = {
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT
};
struct ie_bhli ie_bhli_absent = {
T_ATM_ABSENT,
{ 0, 0, 0, 0, 0, 0, 0, 0 }
};
struct ie_blli ie_blli_absent = {
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
{ 0, 0, 0 },
{ 0, 0 }
};
struct ie_clst ie_clst_absent = {
T_ATM_ABSENT
};
struct ie_cdad ie_cdad_absent = {
T_ATM_ABSENT,
T_ATM_ABSENT,
{ T_ATM_ABSENT, 0 }
};
struct ie_cdsa ie_cdsa_absent = {
{ T_ATM_ABSENT, 0 }
};
struct ie_cgad ie_cgad_absent = {
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
{ T_ATM_ABSENT, 0 }
};
struct ie_cgsa ie_cgsa_absent = {
{ T_ATM_ABSENT, 0 }
};
struct ie_caus ie_caus_absent = {
T_ATM_ABSENT,
T_ATM_ABSENT,
0
};
struct ie_cnid ie_cnid_absent = {
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT,
T_ATM_ABSENT
};
struct ie_qosp ie_qosp_absent = {
T_ATM_ABSENT,
T_ATM_ABSENT
};
struct ie_brpi ie_brpi_absent = {
T_ATM_ABSENT
};
struct ie_rsti ie_rsti_absent = {
T_ATM_ABSENT
};
struct ie_blsh ie_blsh_absent = {
T_ATM_ABSENT
};
struct ie_bnsh ie_bnsh_absent = {
T_ATM_ABSENT
};
struct ie_bsdc ie_bsdc_absent = {
T_ATM_ABSENT
};
struct ie_trnt ie_trnt_absent = {
T_ATM_ABSENT,
T_ATM_ABSENT,
0
};
struct ie_eprf ie_eprf_absent = {
T_ATM_ABSENT,
T_ATM_ABSENT
};
struct ie_epst ie_epst_absent = {
T_ATM_ABSENT
};
/*
* Decode a UNI signalling message
*
* Arguments:
* usf pointer to a unisig formatting structure
* msg pointer to a signalling message structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
int
usf_dec_msg(usf, msg)
struct usfmt *usf;
struct unisig_msg *msg;
{
int i, len, rc;
short s;
u_char c, *ie_tbl;
struct ie_generic *ie;
ATM_DEBUG2("usf_dec_msg: usf=%p, msg=%p\n", usf, msg);
/*
* Check the total message length
*/
if (usf_count(usf) < UNI_MSG_MIN_LEN) {
return(EIO);
}
/*
* Get and check the protocol discriminator
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
if (c != UNI_MSG_DISC_Q93B)
return(EIO);
/*
* Get and check the call reference length
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
if (c != 3)
return(EIO);
/*
* Get the call reference
*/
rc = usf_int3(usf, &msg->msg_call_ref);
if (rc)
return(rc);
/*
* Get the message type
*/
rc = usf_byte(usf, &msg->msg_type);
if (rc)
return(rc);
/*
* Get the message type extension
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
msg->msg_type_flag = (c >> UNI_MSG_TYPE_FLAG_SHIFT) &
UNI_MSG_TYPE_FLAG_MASK;
msg->msg_type_action = c & UNI_MSG_TYPE_ACT_MASK;
/*
* Get the message length and make sure we actually have
* enough data for the whole message
*/
rc = usf_short(usf, &s);
if (rc)
return(rc);
msg->msg_length = s;
if (usf_count(usf) != msg->msg_length) {
return(EMSGSIZE);
}
/*
* Process information elements
*/
len = msg->msg_length;
while (len) {
ALLOC_IE(ie);
rc = usf_dec_ie(usf, msg, ie);
if (rc) {
uma_zfree(unisig_ie_zone, ie);
return(rc);
}
len -= (ie->ie_length + UNI_IE_HDR_LEN);
}
/*
* Make sure that mandatory IEs are included and
* unwanted ones aren't
*/
for (i=0; msg->msg_type!=uni_msg_types[i].msg_type &&
uni_msg_types[i].msg_type!=0; i++) {
}
if (!uni_msg_types[i].msg_ie_tbl)
goto done;
/*
* If the message type is in the table, check the IEs.
* If it isn't, the receive routine will catch the error.
*/
ie_tbl = uni_msg_types[i].msg_ie_tbl;
for (i=0; i<UNI_MSG_IE_CNT-1; i++) {
switch(ie_tbl[i]) {
case IE_MAND:
if (!msg->msg_ie_vec[i]) {
/*
* Mandatory IE missing
*/
ALLOC_IE(ie);
ie->ie_ident = unisig_ie_ident_vec[i];
ie->ie_err_cause = UNI_IE_CAUS_MISSING;
MSG_IE_ADD(msg, ie, UNI_MSG_IE_ERR);
}
break;
case IE_NA:
if (msg->msg_ie_vec[i]) {
/*
* Disallowed IE present
*/
ie = msg->msg_ie_vec[i];
msg->msg_ie_vec[i] =
(struct ie_generic *) 0;
MSG_IE_ADD(msg, ie, UNI_MSG_IE_ERR);
while (ie) {
ie->ie_err_cause =
UNI_IE_CAUS_IEEXIST;
ie = ie->ie_next;
}
}
break;
case IE_OPT:
break;
}
}
done:
return(0);
}
/*
* Decode an information element
*
* This routine will be called repeatedly as long as there are
* information elements left to be decoded. It will decode the
* first part of the IE, look its type up in a table, and call
* the appropriate routine to decode the rest. After an IE is
* successfully decoded, it is linked into the UNI signalling
* message structure. If an error is discovered, the IE is linked
* into the IE error chain and an error cause is set in the header.
*
* Arguments:
* usf pointer to a UNISIG formatting structure
* msg pointer to a UNISIG message structure
* ie pointer to a generic IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie(usf, msg, ie)
struct usfmt *usf;
struct unisig_msg *msg;
struct ie_generic *ie;
{
int i, ie_index, rc;
/*
* Decode the IE header (identifier, instruction field,
* and length)
*/
rc = usf_dec_ie_hdr(usf, ie);
if (rc)
return(rc);
/*
* Ignore the IE if it is of zero length.
*/
if (!ie->ie_length) {
uma_zfree(unisig_ie_zone, ie);
return(0);
}
/*
* Look up the information element in the table
*/
for (i=0; (ie->ie_ident != ie_table[i].ident) &&
(ie_table[i].decode != NULL); i++) {
}
if (ie_table[i].decode == NULL) {
/*
* Unrecognized IE
*/
ie_index = UNI_MSG_IE_ERR;
} else {
ie_index = ie_table[i].p_idx;
}
/*
* Check for unimplemented or unrecognized IEs
*/
if (ie_index == UNI_MSG_IE_ERR) {
ie->ie_err_cause = UNI_IE_CAUS_IEEXIST;
/*
* Skip over the invalid IE
*/
rc = usf_dec_ie_uimp(usf, ie);
if (rc)
return(rc);
goto done;
}
/*
* Check the length against the IE table
*/
if (ie->ie_length < ie_table[i].min_len ||
ie->ie_length > ie_table[i].max_len) {
ie_index = UNI_MSG_IE_ERR;
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
/*
* Skip over the invalid IE
*/
rc = usf_dec_ie_uimp(usf, ie);
if (rc)
return(rc);
goto done;
}
/*
* Process the IE by calling the function indicated
* in the IE table
*/
rc = ie_table[i].decode(usf, ie);
if (rc)
return(rc);
/*
* Link the IE into the signalling message
*/
done:
if (ie->ie_err_cause) {
ie_index = UNI_MSG_IE_ERR;
}
MSG_IE_ADD(msg, ie, ie_index);
return(0);
}
/*
* Decode an information element header
*
* Arguments:
* usf pointer to a UNISIG formatting structure
* ie pointer to a generic IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_hdr(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
u_char c;
short s;
int rc;
/*
* Get the IE identifier
*/
rc = usf_byte(usf, &ie->ie_ident);
if (rc)
return(rc);
/*
* Get the extended type
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_coding = (c >> UNI_IE_CODE_SHIFT) & UNI_IE_CODE_MASK;
ie->ie_flag = (c >> UNI_IE_FLAG_SHIFT) & UNI_IE_FLAG_MASK;
ie->ie_action = c & UNI_IE_ACT_MASK;
/*
* Get the length.
*/
rc = usf_short(usf, &s);
if (rc)
return(rc);
ie->ie_length = s;
return(0);
}
/*
* Decode an AAL parameters information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to an AAL parms IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_aalp(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int i, rc = 0;
/*
* Clear the IE
*/
bcopy(&ie_aalp_absent, &ie->ie_u.ie_aalp,
sizeof(ie_aalp_absent));
/*
* Get the AAL type
*/
rc = usf_byte(usf, &ie->ie_aalp_aal_type);
if (rc)
return(rc);
/*
* Subtract the length of the AAL type from the total.
* It will be readjusted after usf_dec_ie_ident is finished.
*/
ie->ie_length--;
/*
* Process based on AAL type
*/
switch (ie->ie_aalp_aal_type) {
case UNI_IE_AALP_AT_AAL1:
/*
* Clear the AAL 1 subparameters
*/
ie->ie_aalp_1_subtype = T_ATM_ABSENT;
ie->ie_aalp_1_cbr_rate = T_ATM_ABSENT;
ie->ie_aalp_1_multiplier = T_ATM_ABSENT;
ie->ie_aalp_1_clock_recovery = T_ATM_ABSENT;
ie->ie_aalp_1_error_correction = T_ATM_ABSENT;
ie->ie_aalp_1_struct_data_tran = T_ATM_ABSENT;
ie->ie_aalp_1_partial_cells = T_ATM_ABSENT;
/*
* Parse the AAL fields based on their IDs
*/
rc = usf_dec_ie_ident(usf, ie, ie_aal1_tbl);
break;
case UNI_IE_AALP_AT_AAL3:
/*
* Clear the AAL 3/4 subparameters
*/
ie->ie_aalp_4_fwd_max_sdu = T_ATM_ABSENT;
ie->ie_aalp_4_bkwd_max_sdu = T_ATM_ABSENT;
ie->ie_aalp_4_mid_range = T_ATM_ABSENT;
ie->ie_aalp_4_mode = T_ATM_ABSENT;
ie->ie_aalp_4_sscs_type = T_ATM_ABSENT;
/*
* Parse the AAL fields based on their IDs
*/
if (usf->usf_sig->us_proto == ATM_SIG_UNI30)
rc = usf_dec_ie_ident(usf, ie, ie_aal4_tbl_30);
else
rc = usf_dec_ie_ident(usf, ie, ie_aal4_tbl_31);
/*
* If either forward or backward maximum SDU
* size is specified, the other must also be
* specified.
*/
if ((ie->ie_aalp_4_fwd_max_sdu != T_ATM_ABSENT &&
ie->ie_aalp_4_bkwd_max_sdu == T_ATM_ABSENT) ||
(ie->ie_aalp_4_fwd_max_sdu == T_ATM_ABSENT &&
ie->ie_aalp_4_bkwd_max_sdu != T_ATM_ABSENT)) {
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
}
break;
case UNI_IE_AALP_AT_AAL5:
/*
* Clear the AAL 5 subparameters
*/
ie->ie_aalp_5_fwd_max_sdu = T_ATM_ABSENT;
ie->ie_aalp_5_bkwd_max_sdu = T_ATM_ABSENT;
ie->ie_aalp_5_mode = T_ATM_ABSENT;
ie->ie_aalp_5_sscs_type = T_ATM_ABSENT;
/*
* Parse the AAL fields based on their IDs
*/
if (usf->usf_sig->us_proto == ATM_SIG_UNI30)
rc = usf_dec_ie_ident(usf, ie, ie_aal5_tbl_30);
else
rc = usf_dec_ie_ident(usf, ie, ie_aal5_tbl_31);
/*
* If either forward or backward maximum SDU
* size is specified, the other must also be
* specified.
*/
if ((ie->ie_aalp_5_fwd_max_sdu != T_ATM_ABSENT &&
ie->ie_aalp_5_bkwd_max_sdu == T_ATM_ABSENT) ||
(ie->ie_aalp_5_fwd_max_sdu == T_ATM_ABSENT &&
ie->ie_aalp_5_bkwd_max_sdu != T_ATM_ABSENT)) {
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
}
break;
case UNI_IE_AALP_AT_AALU:
/*
* Check user parameter length
*/
if (ie->ie_length >
sizeof(ie->ie_aalp_user_info) +
1) {
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
}
/*
* Get the user data
*/
i = 0;
while (i < ie->ie_length - 2) {
rc = usf_byte(usf, &ie->ie_aalp_user_info[i]);
if (rc)
break;
i++;
}
break;
default:
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
}
ie->ie_length++;
return(rc);
}
/*
* Decode a user cell rate information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a cell rate IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_clrt(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int rc;
/*
* Clear the IE
*/
bcopy(&ie_clrt_absent, &ie->ie_u.ie_clrt,
sizeof(ie_clrt_absent));
/*
* Parse the IE using field identifiers
*/
rc = usf_dec_ie_ident(usf, ie, ie_clrt_tbl);
return(rc);
}
/*
* Decode a broadband bearer capability information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a cell rate IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_bbcp(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int rc;
u_char c;
/*
* Clear the IE
*/
bcopy(&ie_bbcp_absent, &ie->ie_u.ie_bbcp,
sizeof(ie_bbcp_absent));
/*
* Get the broadband bearer class
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_bbcp_bearer_class = c & UNI_IE_BBCP_BC_MASK;
/*
* If the broadband bearer class was X, the next
* byte has the traffic type and timing requirements
*/
if (ie->ie_bbcp_bearer_class == UNI_IE_BBCP_BC_BCOB_X &&
!(c & UNI_IE_EXT_BIT)) {
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_bbcp_traffic_type = (c >> UNI_IE_BBCP_TT_SHIFT) &
UNI_IE_BBCP_TT_MASK;
ie->ie_bbcp_timing_req = c & UNI_IE_BBCP_TR_MASK;
}
/*
* Get the clipping and user plane connection configuration
*/
if (c & UNI_IE_EXT_BIT) {
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_bbcp_clipping = (c >> UNI_IE_BBCP_SC_SHIFT) &
UNI_IE_BBCP_SC_MASK;
ie->ie_bbcp_conn_config = c & UNI_IE_BBCP_CC_MASK;
}
return(0);
}
/*
* Decode a broadband high layer information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a cell rate IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_bhli(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int i, rc;
u_char c;
/*
* Clear the IE
*/
bcopy(&ie_bhli_absent, &ie->ie_u.ie_bhli,
sizeof(ie_bhli_absent));
/*
* Get the high layer information type
*/
rc = usf_ext(usf, &i);
ie->ie_bhli_type = i & UNI_IE_EXT_MASK;
if (rc)
return(rc);
/*
* What comes next depends on the type
*/
switch (ie->ie_bhli_type) {
case UNI_IE_BHLI_TYPE_ISO:
case UNI_IE_BHLI_TYPE_USER:
/*
* ISO or user-specified parameters -- take the
* length of information from the IE length
*/
for (i=0; i<ie->ie_length-1; i++) {
rc = usf_byte(usf, &ie->ie_bhli_info[i]);
if (rc)
return(rc);
}
break;
case UNI_IE_BHLI_TYPE_HLP:
/*
* Make sure the IE is long enough for the high
* layer profile information, then get it
*/
if (usf->usf_sig->us_proto != ATM_SIG_UNI30)
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
if (ie->ie_length < UNI_IE_BHLI_HLP_LEN+1)
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
for (i=0; i<ie->ie_length &&
i<UNI_IE_BHLI_HLP_LEN; i++) {
rc = usf_byte(usf, &ie->ie_bhli_info[i]);
if (rc)
return(rc);
}
break;
case UNI_IE_BHLI_TYPE_VSA:
/*
* Make sure the IE is long enough for the vendor-
* specific application information, then get it
*/
if (ie->ie_length < UNI_IE_BHLI_VSA_LEN+1)
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
for (i=0; i<ie->ie_length &&
i<UNI_IE_BHLI_VSA_LEN; i++) {
rc = usf_byte(usf, &ie->ie_bhli_info[i]);
if (rc)
return(rc);
}
break;
default:
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
for (i=0; i<ie->ie_length; i++) {
rc = usf_byte(usf, &c);
if (rc)
return(rc);
}
}
return(0);
}
/*
* Decode a broadband low layer information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a cell rate IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_blli(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
u_char c, id;
int bc, i, rc;
u_int ipi;
/*
* Clear the IE
*/
bcopy(&ie_blli_absent, &ie->ie_u.ie_blli,
sizeof(ie_blli_absent));
/*
* Get paramteters for the protocol layers as long as
* there is still information left in the IE
*/
bc = ie->ie_length;
while (bc) {
/*
* Get the type and process based on what it is
*/
rc = usf_byte(usf, &id);
if (rc)
return(rc);
switch (((id & UNI_IE_EXT_MASK) >>
UNI_IE_BLLI_LID_SHIFT) &
UNI_IE_BLLI_LID_MASK) {
case UNI_IE_BLLI_L1_ID:
/*
* Layer 1 info
*/
ie->ie_blli_l1_id = id & UNI_IE_BLLI_LP_MASK;
bc--;
break;
case UNI_IE_BLLI_L2_ID:
/*
* Layer 2 info--contents vary based on type
*/
ie->ie_blli_l2_id = id & UNI_IE_BLLI_LP_MASK;
bc--;
if (id & UNI_IE_EXT_BIT)
break;
switch (ie->ie_blli_l2_id) {
case UNI_IE_BLLI_L2P_X25L:
case UNI_IE_BLLI_L2P_X25M:
case UNI_IE_BLLI_L2P_HDLC1:
case UNI_IE_BLLI_L2P_HDLC2:
case UNI_IE_BLLI_L2P_HDLC3:
case UNI_IE_BLLI_L2P_Q922:
case UNI_IE_BLLI_L2P_ISO7776:
rc = usf_byte(usf, &c);
if (rc)
return(rc);
bc--;
ie->ie_blli_l2_mode = (c >>
UNI_IE_BLLI_L2MODE_SHIFT) &
UNI_IE_BLLI_L2MODE_MASK;
if (!(c & UNI_IE_EXT_BIT))
break;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
bc--;
ie->ie_blli_l2_window =
c & UNI_IE_EXT_MASK;
break;
case UNI_IE_BLLI_L2P_USER:
rc = usf_byte(usf, &c);
if (rc)
return(rc);
bc--;
ie->ie_blli_l2_user_proto =
c & UNI_IE_EXT_MASK;
break;
}
break;
case UNI_IE_BLLI_L3_ID:
/*
* Layer 3 info--contents vary based on type
*/
ie->ie_blli_l3_id = id & UNI_IE_BLLI_LP_MASK;
bc--;
switch (ie->ie_blli_l3_id) {
case UNI_IE_BLLI_L3P_X25:
case UNI_IE_BLLI_L3P_ISO8208:
case UNI_IE_BLLI_L3P_ISO8878:
rc = usf_byte(usf, &c);
if (rc)
return(rc);
bc--;
ie->ie_blli_l3_mode = (c >>
UNI_IE_BLLI_L3MODE_SHIFT) &
UNI_IE_BLLI_L3MODE_MASK;
if (!(c & UNI_IE_EXT_BIT))
break;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
bc--;
ie->ie_blli_l3_packet_size =
c & UNI_IE_BLLI_L3PS_MASK;
if (!(c & UNI_IE_EXT_BIT))
break;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
bc--;
ie->ie_blli_l3_window =
c & UNI_IE_EXT_MASK;
break;
case UNI_IE_BLLI_L3P_USER:
rc = usf_byte(usf, &c);
if (rc)
return(rc);
bc--;
ie->ie_blli_l3_mode =
c & UNI_IE_EXT_MASK;
break;
case UNI_IE_BLLI_L3P_ISO9577:
rc = usf_ext(usf, &ipi);
if (rc)
return(rc);
bc -= 2;
ie->ie_blli_l3_ipi = ipi >>
UNI_IE_BLLI_L3IPI_SHIFT;
if (ie->ie_blli_l3_ipi !=
UNI_IE_BLLI_L3IPI_SNAP)
break;
rc = usf_byte(usf, &c);
ie->ie_blli_l3_snap_id = c & UNI_IE_EXT_MASK;
if (rc)
return(rc);
bc --;
rc = usf_byte(usf,
&ie->ie_blli_l3_oui[0]);
if (rc)
return(rc);
rc = usf_byte(usf,
&ie->ie_blli_l3_oui[1]);
if (rc)
return(rc);
rc = usf_byte(usf,
&ie->ie_blli_l3_oui[2]);
if (rc)
return(rc);
rc = usf_byte(usf,
&ie->ie_blli_l3_pid[0]);
if (rc)
return(rc);
rc = usf_byte(usf,
&ie->ie_blli_l3_pid[1]);
if (rc)
return(rc);
bc -= 5;
break;
}
break;
default:
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
for (i=0; i<ie->ie_length; i++) {
rc = usf_byte(usf, &c);
if (rc)
return(rc);
}
}
}
return(0);
}
/*
* Decode a call state information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a cell rate IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_clst(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int rc;
u_char c;
/*
* Clear the IE
*/
bcopy(&ie_clst_absent, &ie->ie_u.ie_clst,
sizeof(ie_clst_absent));
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_clst_state = c & UNI_IE_CLST_STATE_MASK;
return(0);
}
/*
* Decode a called party number information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a cell rate IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_cdad(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int len, rc;
u_char c;
/*
* Clear the IE
*/
bcopy(&ie_cdad_absent, &ie->ie_u.ie_cdad,
sizeof(ie_cdad_absent));
/*
* Get and check the numbering plan
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_cdad_plan = c & UNI_IE_CDAD_PLAN_MASK;
len = ie->ie_length - 1;
switch (ie->ie_cdad_plan) {
case UNI_IE_CDAD_PLAN_E164:
ie->ie_cdad_addr.address_format = T_ATM_E164_ADDR;
break;
case UNI_IE_CDAD_PLAN_NSAP:
ie->ie_cdad_addr.address_format = T_ATM_ENDSYS_ADDR;
break;
default:
/*
* Invalid numbering plan
*/
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
while (len) {
rc = usf_byte(usf, &c);
if (rc)
return(rc);
len--;
}
return(0);
}
/*
* Get the ATM address
*/
rc = usf_dec_atm_addr(usf, &ie->ie_cdad_addr, len);
if (rc == EINVAL) {
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
rc = 0;
}
return(rc);
}
/*
* Decode a called party subaddress information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a cell rate IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_cdsa(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int len, rc;
u_char c;
/*
* Clear the IE
*/
bcopy(&ie_cdsa_absent, &ie->ie_u.ie_cdsa,
sizeof(ie_cdsa_absent));
/*
* Get and check the subaddress type
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
len = ie->ie_length - 1;
if (((c >> UNI_IE_CDSA_TYPE_SHIFT) & UNI_IE_CDSA_TYPE_MASK) !=
UNI_IE_CDSA_TYPE_AESA) {
/*
* Invalid subaddress type
*/
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
while (len) {
rc = usf_byte(usf, &c);
if (rc)
return(rc);
len--;
}
return(0);
}
/*
* Get the ATM address
*/
ie->ie_cdsa_addr.address_format = T_ATM_ENDSYS_ADDR;
rc = usf_dec_atm_addr(usf, &ie->ie_cdsa_addr, len);
if (rc == EINVAL) {
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
rc = 0;
}
return(rc);
}
/*
* Decode a calling party number information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a cell rate IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_cgad(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int len, rc;
u_char c;
/*
* Clear the IE
*/
bcopy(&ie_cgad_absent, &ie->ie_u.ie_cgad,
sizeof(ie_cgad_absent));
/*
* Get and check the numbering plan
*/
len = ie->ie_length;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_cgad_type = (c >> UNI_IE_CGAD_TYPE_SHIFT) &
UNI_IE_CGAD_TYPE_MASK;
ie->ie_cgad_plan = c & UNI_IE_CGAD_PLAN_MASK;
len--;
switch (ie->ie_cgad_plan) {
case UNI_IE_CGAD_PLAN_E164:
ie->ie_cgad_addr.address_format = T_ATM_E164_ADDR;
break;
case UNI_IE_CGAD_PLAN_NSAP:
ie->ie_cgad_addr.address_format = T_ATM_ENDSYS_ADDR;
break;
default:
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
while (len) {
rc = usf_byte(usf, &c);
if (rc)
return(rc);
len--;
}
return(0);
}
/*
* Get the presentation and screening indicators, if present
*/
if (!(c & UNI_IE_EXT_BIT)) {
rc = usf_byte(usf, &c);
if (rc)
return(rc);
len--;
ie->ie_cgad_pres_ind = (c >> UNI_IE_CGAD_PRES_SHIFT) &
UNI_IE_CGAD_PRES_MASK;
ie->ie_cgad_screen_ind = c & UNI_IE_CGAD_SCR_MASK;
} else {
ie->ie_cgad_pres_ind = 0;
ie->ie_cgad_screen_ind =0;
}
/*
* Get the ATM address
*/
rc = usf_dec_atm_addr(usf, &ie->ie_cgad_addr, len);
if (rc == EINVAL) {
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
rc = 0;
}
return(rc);
}
/*
* Decode a calling party subaddress information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a cell rate IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_cgsa(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int len, rc;
u_char c;
/*
* Clear the IE
*/
bcopy(&ie_cgsa_absent, &ie->ie_u.ie_cgsa,
sizeof(ie_cgsa_absent));
/*
* Get and check the subaddress type
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
len = ie->ie_length - 1;
if (((c >> UNI_IE_CGSA_TYPE_SHIFT) & UNI_IE_CGSA_TYPE_MASK) !=
UNI_IE_CGSA_TYPE_AESA) {
/*
* Invalid subaddress type
*/
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
while (len) {
rc = usf_byte(usf, &c);
if (rc)
return(rc);
len--;
}
return(0);
}
/*
* Get the ATM address
*/
ie->ie_cgsa_addr.address_format = T_ATM_ENDSYS_ADDR;
rc = usf_dec_atm_addr(usf, &ie->ie_cgsa_addr, len);
if (rc == EINVAL) {
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
rc = 0;
}
return(rc);
}
/*
* Decode a cause information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a cell rate IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_caus(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int i, len, rc;
u_char c;
/*
* Clear the IE
*/
bcopy(&ie_caus_absent, &ie->ie_u.ie_caus,
sizeof(ie_caus_absent));
/*
* Get the cause location
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_caus_loc = c & UNI_IE_CAUS_LOC_MASK;
/*
* Get the cause value
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_caus_cause = c & UNI_IE_EXT_MASK;
/*
* Get any included diagnostics
*/
len = ie->ie_length - 2;
for (i = 0, ie->ie_caus_diag_len = 0;
len && i < sizeof(ie->ie_caus_diagnostic);
len--, i++, ie->ie_caus_diag_len++) {
rc = usf_byte(usf, &ie->ie_caus_diagnostic[i]);
if (rc)
return(rc);
}
return(0);
}
/*
* Decode a conection identifier information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a cell rate IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_cnid(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int i, rc;
/*
* Clear the IE
*/
bcopy(&ie_cnid_absent, &ie->ie_u.ie_cnid,
sizeof(ie_cnid_absent));
rc = usf_ext(usf, &i);
if (rc)
return(rc);
ie->ie_cnid_vp_sig = (i >> UNI_IE_CNID_VPSIG_SHIFT) &
UNI_IE_CNID_VPSIG_MASK;
ie->ie_cnid_pref_excl = i & UNI_IE_CNID_PREX_MASK;
rc = usf_short(usf, &ie->ie_cnid_vpci);
if (rc)
return(rc);
rc = usf_short(usf, &ie->ie_cnid_vci);
return(rc);
}
/*
* Decode a quality of service parameters information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a cell rate IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_qosp(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int rc;
/*
* Clear the IE
*/
bcopy(&ie_qosp_absent, &ie->ie_u.ie_qosp,
sizeof(ie_qosp_absent));
/*
* Get forward QoS class
*/
rc = usf_byte(usf, &ie->ie_qosp_fwd_class);
if (rc)
return(rc);
/*
* Get backward QoS class
*/
rc = usf_byte(usf, &ie->ie_qosp_bkwd_class);
return(rc);
}
/*
* Decode a broadband repeat indicator information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a cell rate IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_brpi(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int rc;
u_char c;
/*
* Clear the IE
*/
bcopy(&ie_brpi_absent, &ie->ie_u.ie_brpi,
sizeof(ie_brpi_absent));
/*
* Get the repeat indicator
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_brpi_ind = c & UNI_IE_BRPI_IND_MASK;
return(0);
}
/*
* Decode a restart indicator information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a cell rate IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_rsti(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int rc;
u_char c;
/*
* Clear the IE
*/
bcopy(&ie_rsti_absent, &ie->ie_u.ie_rsti,
sizeof(ie_rsti_absent));
/*
* Get the restart class
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_rsti_class = c & UNI_IE_RSTI_CLASS_MASK;
return(0);
}
/*
* Decode a broadband sending complete information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a broadband sending complete IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_bsdc(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int rc;
u_char c;
/*
* Clear the IE
*/
bcopy(&ie_bsdc_absent, &ie->ie_u.ie_bsdc,
sizeof(ie_bsdc_absent));
/*
* Get the sending complete indicator
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
/*
* Validate the indicator
*/
c &= UNI_IE_EXT_MASK;
if (c != UNI_IE_BSDC_IND)
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
ie->ie_bsdc_ind = c;
return(0);
}
/*
* Decode a transit network selection information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a transit network selection IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_trnt(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int i, len, rc;
u_char c;
/*
* Clear the IE
*/
bcopy(&ie_trnt_absent, &ie->ie_u.ie_trnt,
sizeof(ie_trnt_absent));
/*
* Get the network ID type and plan
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_trnt_id_type = (c >> UNI_IE_TRNT_IDT_SHIFT) &
UNI_IE_TRNT_IDT_MASK;
ie->ie_trnt_id_plan = c & UNI_IE_TRNT_IDP_MASK;
/*
* Get the length of the network ID
*/
len = ie->ie_length - 1;
ie->ie_trnt_id_len = MIN(len, sizeof(ie->ie_trnt_id));
/*
* Get the network ID
*/
for (i=0; i<len; i++) {
if (i<sizeof(ie->ie_trnt_id))
rc = usf_byte(usf, &ie->ie_trnt_id[i]);
else
rc = usf_byte(usf, &c);
if (rc)
return(rc);
}
return(0);
}
/*
* Decode an unimplemented information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a cell rate IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_uimp(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int i, rc;
u_char c;
/*
* Skip over the IE contents
*/
for (i=0; i<ie->ie_length; i++) {
rc = usf_byte(usf, &c);
if (rc)
return(rc);
}
return(0);
}
/*
* Decode an information element using field identifiers
*
* The AAL parameters and ATM user cell rate IEs are formatted
* with a one-byte identifier preceding each field. The routine
* parses these IEs by using a table which relates the field
* identifiers with the fields in the appropriate IE structure.
* Field order in the received message is immaterial.
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a cell rate IE structure
* tbl pointer to an IE decoding table
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_ie_ident(usf, ie, tbl)
struct usfmt *usf;
struct ie_generic *ie;
struct ie_decode_tbl *tbl;
{
int i, len, rc;
u_char c;
u_int8_t cv;
u_int16_t sv;
u_int32_t iv;
void *dest;
/*
* Scan through the IE
*/
len = ie->ie_length;
while (len) {
/*
* Get the field identifier
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
len--;
/*
* Look up the field in the table
*/
for (i=0; (tbl[i].ident != c) && tbl[i].len; i++) {
}
if (tbl[i].ident == 0) {
/*
* Bad subfield identifier -- flag an
* error and skip over the rest of the IE
*/
ie->ie_err_cause = UNI_IE_CAUS_IECONTENT;
while (len) {
rc = usf_byte(usf, &c);
if (rc)
return(rc);
}
return(0);
}
/*
* Save final destination address
*/
dest = (void *)((intptr_t)ie + tbl[i].f_offs);
/*
* Get the field value
*/
switch (tbl[i].len) {
case 0:
cv = 1;
goto savec;
case 1:
rc = usf_byte(usf, &cv);
if (rc)
break;
savec:
/*
* Save field value
*/
switch (tbl[i].f_size) {
case 1:
*(u_int8_t *)dest = cv;
break;
case 2:
*(u_int16_t *)dest = cv;
break;
case 4:
*(u_int32_t *)dest = cv;
break;
default:
goto badtbl;
}
break;
case 2:
rc = usf_short(usf, &sv);
if (rc)
break;
/*
* Save field value
*/
switch (tbl[i].f_size) {
case 2:
*(u_int16_t *)dest = sv;
break;
case 4:
*(u_int32_t *)dest = sv;
break;
default:
goto badtbl;
}
break;
case 3:
rc = usf_int3(usf, &iv);
goto savei;
case 4:
rc = usf_int(usf, &iv);
savei:
/*
* Save field value
*/
if (rc)
break;
switch (tbl[i].f_size) {
case 4:
*(u_int32_t *)dest = iv;
break;
default:
goto badtbl;
}
break;
default:
badtbl:
log(LOG_ERR,
"uni decode: id=%d,len=%d,off=%d,size=%d\n",
tbl[i].ident, tbl[i].len,
tbl[i].f_offs, tbl[i].f_size);
rc = EFAULT;
break;
}
if (rc)
return(rc);
len -= tbl[i].len;
}
return(0);
}
/*
* Decode an ATM address
*
* Arguments:
* usf pointer to a unisig formatting structure
* addr pointer to an ATM address structure
* len length of data remainig in the IE
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_dec_atm_addr(usf, addr, len)
struct usfmt *usf;
Atm_addr *addr;
int len;
{
int rc;
u_char c, *cp;
/*
* Check the address type
*/
addr->address_length = len;
switch (addr->address_format) {
case T_ATM_E164_ADDR:
if (len > sizeof(Atm_addr_e164)) {
goto flush;
}
cp = (u_char *) addr->address;
break;
case T_ATM_ENDSYS_ADDR:
if (len != sizeof(Atm_addr_nsap)) {
goto flush;
}
cp = (u_char *) addr->address;
break;
default:
/* Silence the compiler */
cp = NULL;
}
/*
* Get the ATM address
*/
while (len) {
rc = usf_byte(usf, cp);
if (rc)
return(rc);
len--;
cp++;
}
return(0);
flush:
while (len) {
rc = usf_byte(usf, &c);
if (rc)
return(rc);
len--;
}
return(EINVAL);
}