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freebsd-src/sys/netatm/uni/unisig_encode.c
Peter Wemm c3aac50f28 $Id$ -> $FreeBSD$
1999-08-28 01:08:13 +00:00

1681 lines
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/*
*
* ===================================
* 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.
*
* @(#) $FreeBSD$
*
*/
/*
* ATM Forum UNI 3.0/3.1 Signalling Manager
* ----------------------------------------
*
* Message formatting module
*
*/
#include <netatm/kern_include.h>
#include <netatm/uni/unisig.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>
#ifndef lint
__RCSID("@(#) $FreeBSD$");
#endif
/*
* Local functions
*/
static int usf_enc_ie __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_aalp __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_clrt __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_bbcp __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_bhli __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_blli __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_clst __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_cdad __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_cdsa __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_cgad __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_cgsa __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_caus __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_cnid __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_qosp __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_brpi __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_rsti __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_bsdc __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_trnt __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_uimp __P((struct usfmt *, struct ie_generic *));
static int usf_enc_ie_ident __P((struct usfmt *, struct ie_generic *,
struct ie_decode_tbl *));
static int usf_enc_atm_addr __P((struct usfmt *, Atm_addr *));
/*
* Local variables
*/
static struct {
u_char ident; /* IE identifier */
int (*encode) __P((struct usfmt *, struct ie_generic *));
/* Encoding function */
} ie_table[] = {
{ UNI_IE_AALP, usf_enc_ie_aalp },
{ UNI_IE_CLRT, usf_enc_ie_clrt },
{ UNI_IE_BBCP, usf_enc_ie_bbcp },
{ UNI_IE_BHLI, usf_enc_ie_bhli },
{ UNI_IE_BLLI, usf_enc_ie_blli },
{ UNI_IE_CLST, usf_enc_ie_clst },
{ UNI_IE_CDAD, usf_enc_ie_cdad },
{ UNI_IE_CDSA, usf_enc_ie_cdsa },
{ UNI_IE_CGAD, usf_enc_ie_cgad },
{ UNI_IE_CGSA, usf_enc_ie_cgsa },
{ UNI_IE_CAUS, usf_enc_ie_caus },
{ UNI_IE_CNID, usf_enc_ie_cnid },
{ UNI_IE_QOSP, usf_enc_ie_qosp },
{ UNI_IE_BRPI, usf_enc_ie_brpi },
{ UNI_IE_RSTI, usf_enc_ie_rsti },
{ UNI_IE_BLSH, usf_enc_ie_uimp },
{ UNI_IE_BNSH, usf_enc_ie_uimp },
{ UNI_IE_BSDC, usf_enc_ie_bsdc },
{ UNI_IE_TRNT, usf_enc_ie_trnt },
{ UNI_IE_EPRF, usf_enc_ie_uimp },
{ UNI_IE_EPST, usf_enc_ie_uimp },
{ 0, 0 }
};
extern struct ie_decode_tbl ie_aal1_tbl[];
extern struct ie_decode_tbl ie_aal4_tbl_30[];
extern struct ie_decode_tbl ie_aal4_tbl_31[];
extern struct ie_decode_tbl ie_aal5_tbl_30[];
extern struct ie_decode_tbl ie_aal5_tbl_31[];
extern struct ie_decode_tbl ie_clrt_tbl[];
/*
* Encode 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_enc_msg(usf, msg)
struct usfmt *usf;
struct unisig_msg *msg;
{
int i, len, rc;
u_char c;
u_char *lp0, *lp1;
struct ie_generic *ie;
union {
short s;
u_char sb[sizeof(short)];
} su;
ATM_DEBUG2("usf_enc_msg: usf=%p, msg=%p\n",
usf, msg);
/*
* Encode the protocol discriminator
*/
c = UNI_MSG_DISC_Q93B;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
/*
* Encode the call reference length
*/
c = 3;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
/*
* Encode the call reference
*/
rc = usf_int3(usf, &msg->msg_call_ref);
if (rc)
return(rc);
/*
* Encode the message type
*/
rc = usf_byte(usf, &msg->msg_type);
if (rc)
return(rc);
/*
* Encode the message type extension
*/
c = ((msg->msg_type_flag & UNI_MSG_TYPE_FLAG_MASK) <<
UNI_MSG_TYPE_FLAG_SHIFT) +
(msg->msg_type_action & UNI_MSG_TYPE_ACT_MASK) +
UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
/*
* Save the location of the message length and encode a length
* of zero for now. We'll fix the length up at the end.
*/
su.s = 0;
rc = usf_byte_mark(usf, &su.sb[sizeof(short)-2], &lp0);
if (rc)
return(rc);
rc = usf_byte_mark(usf, &su.sb[sizeof(short)-1], &lp1);
if (rc)
return(rc);
/*
* Process information elements
*/
len = 0;
for (i=0; i<UNI_MSG_IE_CNT; i++) {
ie = msg->msg_ie_vec[i];
while (ie) {
rc = usf_enc_ie(usf, ie);
if (rc)
return(rc);
len += (ie->ie_length + UNI_IE_HDR_LEN);
ie = ie->ie_next;
}
}
/*
* Fix the message length in the encoded message
*/
su.s = htons((u_short)len);
*lp0 = su.sb[sizeof(short)-2];
*lp1 = su.sb[sizeof(short)-1];
return(0);
}
/*
* Encode an information element
*
* 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_enc_ie(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int i, rc;
u_char c;
u_char *lp0, *lp1;
union {
short s;
u_char sb[sizeof(short)];
} su;
ATM_DEBUG2("usf_enc_ie: usf=%p, ie=%p\n",
usf, ie);
/*
* Encode the IE identifier
*/
rc = usf_byte(usf, &ie->ie_ident);
if (rc)
return(rc);
/*
* Encode the extended type
*/
c = ((ie->ie_coding & UNI_IE_CODE_MASK) << UNI_IE_CODE_SHIFT) +
((ie->ie_flag & UNI_IE_FLAG_MASK) <<
UNI_IE_FLAG_SHIFT) +
(ie->ie_action & UNI_IE_ACT_MASK) +
UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
/*
* Mark the current location in the output stream. Encode a
* length of zero for now; we'll come back and fix it up at
* the end.
*/
su.s = 0;
rc = usf_byte_mark(usf, &su.sb[sizeof(short)-2], &lp0);
if (rc)
return(rc);
rc = usf_byte_mark(usf, &su.sb[sizeof(short)-1], &lp1);
if (rc)
return(rc);
/*
* Look up the information element in the table
*/
for (i=0; (ie->ie_ident != ie_table[i].ident) &&
(ie_table[i].encode != NULL); i++) {
}
if (ie_table[i].encode == NULL) {
/*
* Unrecognized IE
*/
return(EINVAL);
}
/*
* Process the IE by calling the function indicated
* in the IE table
*/
rc = ie_table[i].encode(usf, ie);
if (rc)
return(rc);
/*
* Set the length in the output stream
*/
su.s = htons((u_short)ie->ie_length);
*lp0 = su.sb[sizeof(short)-2];
*lp1 = su.sb[sizeof(short)-1];
return(0);
}
/*
* Encode 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_enc_ie_aalp(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int i, rc = 0;
ATM_DEBUG2("usf_enc_ie_aalp: usf=%p, ie=%p\n",
usf, ie);
ie->ie_length = 0;
/*
* Encode the AAL type
*/
if (ie->ie_aalp_aal_type == T_ATM_ABSENT)
return(0);
rc = usf_byte(usf, &ie->ie_aalp_aal_type);
if (rc)
return(rc);
/*
* Process based on AAL type
*/
switch (ie->ie_aalp_aal_type) {
case UNI_IE_AALP_AT_AAL1:
rc = usf_enc_ie_ident(usf, ie, ie_aal1_tbl);
break;
case UNI_IE_AALP_AT_AAL3:
if (usf->usf_sig->us_proto == ATM_SIG_UNI30)
rc = usf_enc_ie_ident(usf, ie, ie_aal4_tbl_30);
else
rc = usf_enc_ie_ident(usf, ie, ie_aal4_tbl_31);
break;
case UNI_IE_AALP_AT_AAL5:
if (usf->usf_sig->us_proto == ATM_SIG_UNI30)
rc = usf_enc_ie_ident(usf, ie, ie_aal5_tbl_30);
else
rc = usf_enc_ie_ident(usf, ie, ie_aal5_tbl_31);
break;
case UNI_IE_AALP_AT_AALU:
/*
* Encode the user data
*/
i = 0;
while (i < sizeof(ie->ie_aalp_user_info)) {
rc = usf_byte(usf, &ie->ie_aalp_user_info[i]);
if (rc)
break;
i++;
ie->ie_length++;
}
break;
default:
return(EINVAL);
}
ie->ie_length++;
return(rc);
}
/*
* Encode a user cell rate information element
*
* This routine just encodes the parameters required for best
* effort service.
*
* 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_enc_ie_clrt(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int rc;
ATM_DEBUG2("usf_enc_ie_clrt: usf=%p, ie=%p\n",
usf, ie);
#ifdef NOTDEF
/*
* Encode Peak Cell Rate Forward CLP = 0 + 1
*/
c = UNI_IE_CLRT_FWD_PEAK_01_ID;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
rc = usf_int3(usf, &ie->ie_clrt_fwd_peak_01);
if (rc)
return(rc);
/*
* Encode Peak Cell Rate Backward CLP = 0 + 1
*/
c = UNI_IE_CLRT_BKWD_PEAK_01_ID;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
rc = usf_int3(usf, &ie->ie_clrt_bkwd_peak_01);
if (rc)
return(rc);
/*
* Encode Best Effort Flag
*/
c = UNI_IE_CLRT_BEST_EFFORT_ID;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
/*
* Set IE length
*/
ie->ie_length = 9;
#endif
/*
* Encode the user cell rate IE using the table
*/
ie->ie_length = 0;
rc = usf_enc_ie_ident(usf, ie, ie_clrt_tbl);
return(rc);
}
/*
* Encode 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_enc_ie_bbcp(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int rc;
u_char c;
ATM_DEBUG2("usf_enc_ie_bbcp: usf=%p, ie=%p\n",
usf, ie);
ie->ie_length = 0;
/*
* Encode the broadband bearer class
*/
if (ie->ie_bbcp_bearer_class == T_ATM_ABSENT)
return(0);
c = ie->ie_bbcp_bearer_class & UNI_IE_BBCP_BC_MASK;
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_length++;
/*
* 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 = ((ie->ie_bbcp_traffic_type & UNI_IE_BBCP_TT_MASK) <<
UNI_IE_BBCP_TT_SHIFT) +
(ie->ie_bbcp_timing_req &
UNI_IE_BBCP_TR_MASK) +
UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
}
/*
* Encode the clipping and user plane connection configuration
*/
c = ((ie->ie_bbcp_clipping & UNI_IE_BBCP_SC_MASK) <<
UNI_IE_BBCP_SC_SHIFT) +
(ie->ie_bbcp_conn_config &
UNI_IE_BBCP_CC_MASK) +
UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
return(0);
}
/*
* Encode 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_enc_ie_bhli(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int i, rc;
u_int type;
ATM_DEBUG2("usf_enc_ie_bhli: usf=%p, ie=%p\n",
usf, ie);
ie->ie_length = 0;
/*
* Encode the high layer information type
*/
if (ie->ie_bhli_type == T_ATM_ABSENT)
return(0);
type = ie->ie_bhli_type | UNI_IE_EXT_BIT;
rc = usf_ext(usf, &type);
if (rc)
return(rc);
ie->ie_length++;
/*
* 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);
ie->ie_length++;
}
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)
return (EINVAL);
for (i=0; i<UNI_IE_BHLI_HLP_LEN; i++) {
rc = usf_byte(usf, &ie->ie_bhli_info[i]);
if (rc)
return(rc);
ie->ie_length++;
}
break;
case UNI_IE_BHLI_TYPE_VSA:
/*
* Make sure the IE is long enough for the vendor-
* specific application information, then get it
*/
for (i=0; i<UNI_IE_BHLI_VSA_LEN; i++) {
rc = usf_byte(usf, &ie->ie_bhli_info[i]);
if (rc)
return(rc);
ie->ie_length++;
}
break;
default:
return(EINVAL);
}
return(0);
}
/*
* Encode 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_enc_ie_blli(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
u_char c;
int rc;
u_int ipi;
ATM_DEBUG2("usf_enc_ie_blli: usf=%p, ie=%p\n",
usf, ie);
ie->ie_length = 0;
/*
* Encode paramteters for whichever protocol layers the
* user specified
*/
/*
* Layer 1 information
*/
if (ie->ie_blli_l1_id && ie->ie_blli_l1_id != T_ATM_ABSENT) {
c = (UNI_IE_BLLI_L1_ID << UNI_IE_BLLI_LID_SHIFT) +
(ie->ie_blli_l1_id &
UNI_IE_BLLI_LP_MASK) +
UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
}
/*
* Layer 2 information
*/
if (ie->ie_blli_l2_id && ie->ie_blli_l2_id != T_ATM_ABSENT) {
c = (UNI_IE_BLLI_L2_ID << UNI_IE_BLLI_LID_SHIFT) +
(ie->ie_blli_l2_id &
UNI_IE_BLLI_LP_MASK);
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:
/*
* Write the Layer 2 type
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
/*
* Encode the Layer 2 mode
*/
if (ie->ie_blli_l2_mode) {
c = (ie->ie_blli_l2_mode &
UNI_IE_BLLI_L2MODE_MASK) <<
UNI_IE_BLLI_L2MODE_SHIFT;
if (!ie->ie_blli_l2_window)
c |= UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
}
/*
* Encode the Layer 2 window size
*/
if (ie->ie_blli_l2_window) {
c = (ie->ie_blli_l2_window &
UNI_IE_EXT_MASK) +
UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
}
break;
case UNI_IE_BLLI_L2P_USER:
/*
* Write the Layer 2 type
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
/*
* Encode the user-specified layer 2 info
*/
c = (ie->ie_blli_l2_user_proto &
UNI_IE_EXT_MASK) +
UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
break;
default:
/*
* Write the Layer 2 type
*/
c |= UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
break;
}
}
/*
* Layer 3 information
*/
if (ie->ie_blli_l3_id && ie->ie_blli_l3_id != T_ATM_ABSENT) {
/*
* Encode the layer 3 protocol ID
*/
c = (UNI_IE_BLLI_L3_ID << UNI_IE_BLLI_LID_SHIFT) +
(ie->ie_blli_l3_id &
UNI_IE_BLLI_LP_MASK);
/*
* Process other fields based on protocol ID
*/
switch(ie->ie_blli_l3_id) {
case UNI_IE_BLLI_L3P_X25:
case UNI_IE_BLLI_L3P_ISO8208:
case UNI_IE_BLLI_L3P_ISO8878:
/*
* Write the protocol ID
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
if (ie->ie_blli_l3_mode ||
ie->ie_blli_l3_packet_size ||
ie->ie_blli_l3_window) {
c = (ie->ie_blli_l3_mode &
UNI_IE_BLLI_L3MODE_MASK) <<
UNI_IE_BLLI_L3MODE_SHIFT;
if (!ie->ie_blli_l3_packet_size &&
!ie->ie_blli_l3_window)
c |= UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
}
if (ie->ie_blli_l3_packet_size ||
ie->ie_blli_l3_window) {
c = ie->ie_blli_l3_packet_size &
UNI_IE_BLLI_L3PS_MASK;
if (!ie->ie_blli_l3_window)
c |= UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
}
if (ie->ie_blli_l3_window) {
c = (ie->ie_blli_l3_window &
UNI_IE_EXT_MASK) +
UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
}
break;
case UNI_IE_BLLI_L3P_USER:
/*
* Write the protocol ID
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
/*
* Encode the user-specified protocol info
*/
c = (ie->ie_blli_l3_user_proto &
UNI_IE_EXT_MASK) +
UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
break;
case UNI_IE_BLLI_L3P_ISO9577:
/*
* Write the protocol ID
*/
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
/*
* Encode the IPI
*/
ipi = ie->ie_blli_l3_ipi <<
UNI_IE_BLLI_L3IPI_SHIFT;
rc = usf_ext(usf, &ipi);
if (rc)
return(rc);
ie->ie_length += 2;
if (ie->ie_blli_l3_ipi ==
UNI_IE_BLLI_L3IPI_SNAP) {
c = UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
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);
ie->ie_length += 6;
}
break;
default:
/*
* Write the layer 3 protocol ID
*/
c |= UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
break;
}
}
return(0);
}
/*
* Encode 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_enc_ie_clst(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int rc;
u_char c;
ATM_DEBUG2("usf_enc_ie_clst: usf=%p, ie=%p\n",
usf, ie);
c = ie->ie_clst_state & UNI_IE_CLST_STATE_MASK;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length = 1;
return(0);
}
/*
* Encode 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_enc_ie_cdad(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
u_char c;
int rc;
ATM_DEBUG2("usf_enc_ie_cdad: usf=%p, ie=%p\n",
usf, ie);
/*
* Encode the numbering plan
*/
switch(ie->ie_cdad_addr.address_format) {
case T_ATM_E164_ADDR:
c = UNI_IE_CDAD_PLAN_E164 +
(UNI_IE_CDAD_TYPE_INTL
<< UNI_IE_CDAD_TYPE_SHIFT);
ie->ie_length = sizeof(Atm_addr_e164) + 1;
break;
case T_ATM_ENDSYS_ADDR:
c = UNI_IE_CDAD_PLAN_NSAP +
(UNI_IE_CDAD_TYPE_UNK
<< UNI_IE_CDAD_TYPE_SHIFT);
ie->ie_length = sizeof(Atm_addr_nsap) + 1;
break;
default:
return(EINVAL);
}
c |= UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
/*
* Encode the ATM address
*/
rc = usf_enc_atm_addr(usf, &ie->ie_cdad_addr);
return(rc);
}
/*
* Encode 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_enc_ie_cdsa(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
u_char c;
int rc;
/*
* Encode the subaddress type
*/
switch(ie->ie_cdsa_addr.address_format) {
case T_ATM_ENDSYS_ADDR:
c = UNI_IE_CDSA_TYPE_AESA << UNI_IE_CDSA_TYPE_SHIFT;
ie->ie_length = sizeof(Atm_addr_nsap) + 1;
break;
default:
return(EINVAL);
}
c |= UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
/*
* Encode the ATM address
*/
rc = usf_enc_atm_addr(usf, &ie->ie_cdsa_addr);
return(rc);
}
/*
* Encode 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_enc_ie_cgad(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
u_char c;
int rc;
ATM_DEBUG2("usf_enc_ie_cgad: usf=%p, ie=%p\n",
usf, ie);
/*
* Encode the numbering plan
*/
switch(ie->ie_cgad_addr.address_format) {
case T_ATM_E164_ADDR:
c = UNI_IE_CGAD_PLAN_E164 +
(UNI_IE_CGAD_TYPE_INTL
<< UNI_IE_CGAD_TYPE_SHIFT) +
UNI_IE_EXT_BIT;
ie->ie_length = sizeof(Atm_addr_e164) + 1;
break;
case T_ATM_ENDSYS_ADDR:
c = UNI_IE_CGAD_PLAN_NSAP +
(UNI_IE_CGAD_TYPE_UNK
<< UNI_IE_CGAD_TYPE_SHIFT) +
UNI_IE_EXT_BIT;
ie->ie_length = sizeof(Atm_addr_nsap) + 1;
break;
default:
return(EINVAL);
}
rc = usf_byte(usf, &c);
if (rc)
return(rc);
/*
* Encode the presentation and screening indicators
*/
#ifdef NOTDEF
c = ((ie->ie_cgad_pres_ind & UNI_IE_CGAD_PRES_MASK)
<< UNI_IE_CGAD_PRES_SHIFT) +
(ie->ie_cgad_screen_ind &
UNI_IE_CGAD_SCR_MASK) +
UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
#endif
/*
* Encode the ATM address
*/
rc = usf_enc_atm_addr(usf, &ie->ie_cgad_addr);
return(rc);
}
/*
* Encode 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_enc_ie_cgsa(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
u_char c;
int rc;
/*
* Encode the subaddress type
*/
switch(ie->ie_cgsa_addr.address_format) {
case T_ATM_ENDSYS_ADDR:
c = UNI_IE_CGSA_TYPE_AESA << UNI_IE_CGSA_TYPE_SHIFT;
ie->ie_length = sizeof(Atm_addr_nsap) + 1;
break;
default:
return(EINVAL);
}
c |= UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
/*
* Encode the ATM address
*/
rc = usf_enc_atm_addr(usf, &ie->ie_cgsa_addr);
return(rc);
}
/*
* Encode 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_enc_ie_caus(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int i, rc;
u_char c;
ATM_DEBUG2("usf_enc_ie_caus: usf=%p, ie=%p\n",
usf, ie);
ie->ie_length = 0;
/*
* Encode the cause location
*/
c = (ie->ie_caus_loc & UNI_IE_CAUS_LOC_MASK) | UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
/*
* Encode the cause value
*/
c = ie->ie_caus_cause | UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length++;
/*
* Encode any included diagnostics
*/
for (i = 0; i < ie->ie_caus_diag_len &&
i < sizeof(ie->ie_caus_diagnostic);
i++) {
rc = usf_byte(usf, &ie->ie_caus_diagnostic[i]);
if (rc)
return(rc);
ie->ie_length++;
}
return(0);
}
/*
* Encode 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_enc_ie_cnid(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int rc;
u_char c;
ATM_DEBUG2("usf_enc_ie_cnid: usf=%p, ie=%p\n",
usf, ie);
c = ((ie->ie_cnid_vp_sig & UNI_IE_CNID_VPSIG_MASK)
<< UNI_IE_CNID_VPSIG_SHIFT) +
(ie->ie_cnid_pref_excl & UNI_IE_CNID_PREX_MASK) +
UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
rc = usf_short(usf, &ie->ie_cnid_vpci);
if (rc)
return(rc);
rc = usf_short(usf, &ie->ie_cnid_vci);
if (rc)
return(rc);
ie->ie_length = 5;
return(0);
}
/*
* Encode 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_enc_ie_qosp(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int rc;
ATM_DEBUG2("usf_enc_ie_qosp: usf=%p, ie=%p\n",
usf, ie);
/*
* Encode forward QoS class
*/
if (ie->ie_qosp_fwd_class == T_ATM_ABSENT ||
ie->ie_qosp_bkwd_class == T_ATM_ABSENT)
return(0);
rc = usf_byte(usf, &ie->ie_qosp_fwd_class);
if (rc)
return(rc);
/*
* Encode backward QoS class
*/
rc = usf_byte(usf, &ie->ie_qosp_bkwd_class);
ie->ie_length = 2;
return(rc);
}
/*
* Encode 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_enc_ie_brpi(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int rc;
u_char c;
ATM_DEBUG2("usf_enc_ie_brpi: usf=%p, ie=%p\n",
usf, ie);
/*
* Encode the repeat indicator
*/
c = ie->ie_brpi_ind + UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
return(rc);
}
/*
* Encode 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_enc_ie_rsti(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int rc;
u_char c;
ATM_DEBUG2("usf_enc_ie_rsti: usf=%p, ie=%p\n",
usf, ie);
/*
* Encode the restart class
*/
c = (ie->ie_rsti_class & UNI_IE_RSTI_CLASS_MASK) |
UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
ie->ie_length = 1;
return(rc);
}
/*
* Encode 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_enc_ie_bsdc(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int rc;
u_char c;
ATM_DEBUG2("usf_enc_ie_bsdc: usf=%p, ie=%p\n",
usf, ie);
/*
* Encode the sending complete indicator
*/
c = UNI_IE_BSDC_IND | UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
ie->ie_length = 1;
return(rc);
}
/*
* Encode a transit network selection information element
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to a transit network selection rate IE structure
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_enc_ie_trnt(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
int i, rc;
u_char c;
ATM_DEBUG2("usf_enc_ie_trnt: usf=%p, ie=%p\n",
usf, ie);
/*
* Encode the sending complete indicator
*/
c = ((ie->ie_trnt_id_type & UNI_IE_TRNT_IDT_MASK) <<
UNI_IE_TRNT_IDT_SHIFT) +
(ie->ie_trnt_id_plan & UNI_IE_TRNT_IDP_MASK) +
UNI_IE_EXT_BIT;
rc = usf_byte(usf, &c);
if (rc)
return(rc);
ie->ie_length = 1;
/*
* Encode the network identification
*/
for (i=0; i<ie->ie_trnt_id_len; i++) {
rc = usf_byte(usf, &ie->ie_trnt_id[i]);
if (rc)
return(rc);
ie->ie_length++;
}
return(rc);
}
/*
* Encode an unsupported IE type
*
* Arguments:
* usf pointer to a unisig formatting structure
* ie pointer to an IE structure
*
* Returns:
* 0 success
*
*/
static int
usf_enc_ie_uimp(usf, ie)
struct usfmt *usf;
struct ie_generic *ie;
{
return(0);
}
/*
* Encode an information element using field identifiers
*
* The AAL parameters and ATM user cell rate IEs are formatted
* with a one-byte identifier preceeding each field. The routine
* encodes these IEs by using a table which relates the field
* identifiers with the fields in the appropriate IE structure.
*
* 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_enc_ie_ident(usf, ie, tbl)
struct usfmt *usf;
struct ie_generic *ie;
struct ie_decode_tbl *tbl;
{
int i, len, rc;
char *cp;
u_int8_t cv;
u_int16_t sv;
u_int32_t iv;
ATM_DEBUG3("usf_enc_ie_ident: usf=%p, ie=%p, tbl=%p\n",
usf, ie, tbl);
/*
* Scan through the IE table
*/
len = 0;
for (i=0; tbl[i].ident; i++) {
/*
* Check whether to send the field
*/
cp = (char *) ((int)ie + tbl[i].f_offs);
if (tbl[i].len == 0) {
if ((*cp == T_NO || *cp == T_ATM_ABSENT))
continue;
} else {
switch (tbl[i].f_size) {
case 1:
if (*(int8_t *)cp == T_ATM_ABSENT)
continue;
break;
case 2:
if (*(int16_t *)cp == T_ATM_ABSENT)
continue;
break;
case 4:
if (*(int32_t *)cp == T_ATM_ABSENT)
continue;
break;
default:
badtbl:
log(LOG_ERR,
"uni encode: id=%d,len=%d,off=%d,size=%d\n",
tbl[i].ident, tbl[i].len,
tbl[i].f_offs, tbl[i].f_size);
return (EFAULT);
}
}
/*
* Encode the field identifier
*/
rc = usf_byte(usf, &tbl[i].ident);
if (rc)
return(rc);
len++;
/*
* Encode the field value
*/
switch (tbl[i].len) {
case 0:
break;
case 1:
switch (tbl[i].f_size) {
case 1:
cv = *(u_int8_t *)cp;
break;
case 2:
cv = *(u_int16_t *)cp;
break;
case 4:
cv = *(u_int32_t *)cp;
break;
default:
goto badtbl;
}
rc = usf_byte(usf, &cv);
break;
case 2:
switch (tbl[i].f_size) {
case 2:
sv = *(u_int16_t *)cp;
break;
case 4:
sv = *(u_int32_t *)cp;
break;
default:
goto badtbl;
}
rc = usf_short(usf, &sv);
break;
case 3:
switch (tbl[i].f_size) {
case 4:
iv = *(u_int32_t *)cp;
break;
default:
goto badtbl;
}
rc = usf_int3(usf, &iv);
break;
case 4:
switch (tbl[i].f_size) {
case 4:
iv = *(u_int32_t *)cp;
break;
default:
goto badtbl;
}
rc = usf_int(usf, &iv);
break;
default:
goto badtbl;
}
len += tbl[i].len;
if (rc)
return(rc);
}
ie->ie_length = len;
return(0);
}
/*
* Encode an ATM address
*
* Arguments:
* usf pointer to a unisig formatting structure
* addr pointer to an ATM address structure. The address
* type must already be set correctly.
*
* Returns:
* 0 success
* errno error encountered
*
*/
static int
usf_enc_atm_addr(usf, addr)
struct usfmt *usf;
Atm_addr *addr;
{
int len, rc;
u_char *cp;
/*
* Check the address type
*/
switch (addr->address_format) {
case T_ATM_E164_ADDR:
cp = (u_char *) addr->address;
len = sizeof(Atm_addr_e164);
break;
case T_ATM_ENDSYS_ADDR:
cp = (u_char *) addr->address;
len = sizeof(Atm_addr_nsap);
break;
default:
return(EINVAL);
}
/*
* Get the address bytes
*/
while (len) {
rc = usf_byte(usf, cp);
if (rc)
return(rc);
len--;
cp++;
}
return(0);
}
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