1238 lines
23 KiB
C
1238 lines
23 KiB
C
/*
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*
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* ===================================
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* HARP | Host ATM Research Platform
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* ===================================
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*
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*
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* This Host ATM Research Platform ("HARP") file (the "Software") is
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* made available by Network Computing Services, Inc. ("NetworkCS")
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* "AS IS". NetworkCS does not provide maintenance, improvements or
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* support of any kind.
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*
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* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
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* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
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* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
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* In no event shall NetworkCS be responsible for any damages, including
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* but not limited to consequential damages, arising from or relating to
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* any use of the Software or related support.
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*
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* Copyright 1994-1998 Network Computing Services, Inc.
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*
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* Copies of this Software may be made, however, the above copyright
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* notice must be reproduced on all copies.
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*
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* @(#) $FreeBSD$
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*
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*/
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/*
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* ATM Forum UNI Support
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* ---------------------
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*
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* SSCOP - PDU subroutines
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*
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*/
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#include <netatm/kern_include.h>
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#include <netatm/uni/sscop.h>
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#include <netatm/uni/sscop_misc.h>
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#include <netatm/uni/sscop_pdu.h>
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#include <netatm/uni/sscop_var.h>
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#ifndef lint
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__RCSID("@(#) $FreeBSD$");
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#endif
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/*
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* Local functions
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*/
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static KBuffer * sscop_stat_init __P((struct sscop *));
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static KBuffer * sscop_stat_add __P((sscop_seq, KBuffer *));
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static int sscop_stat_end __P((struct sscop *, sscop_seq,
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KBuffer *, KBuffer *));
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static int sscop_recv_locate __P((struct sscop *, sscop_seq,
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struct pdu_hdr **));
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/*
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* Build and send BGN PDU
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*
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* A BGN PDU will be constructed and passed down the protocol stack.
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* The SSCOP-UU/N(UU) field is not supported.
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*
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* Arguments:
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* sop pointer to sscop connection control block
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* source originator of BGN PDU (Q.SAAL1 only)
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*
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* Returns:
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* 0 PDU successfully built and passed down the stack
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* else unable to build or send pdu
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*
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*/
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int
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sscop_send_bgn(sop, source)
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struct sscop *sop;
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int source;
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{
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KBuffer *m;
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struct bgn_pdu *bp;
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int err;
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/*
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* Get buffer for PDU
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*/
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KB_ALLOCPKT(m, sizeof(struct bgn_pdu), KB_F_NOWAIT, KB_T_HEADER);
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if (m == NULL)
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return (1);
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/*
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* Setup buffer controls
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*/
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KB_HEADSET(m, MIN(sop->so_headout,
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KB_BFRLEN(m) - sizeof(struct bgn_pdu)));
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KB_LEN(m) = sizeof(struct bgn_pdu);
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/*
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* Build PDU
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*/
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KB_DATASTART(m, bp, struct bgn_pdu *);
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*(int *)&bp->bgn_rsvd[0] = 0;
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if (sop->so_vers != SSCOP_VERS_QSAAL)
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bp->bgn_nsq = sop->so_sendconn;
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bp->bgn_nmr =
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htonl((PT_BGN << PT_TYPE_SHIFT) | SEQ_VAL(sop->so_rcvmax));
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if ((sop->so_vers == SSCOP_VERS_QSAAL) &&
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(source == SSCOP_SOURCE_SSCOP))
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bp->bgn_type |= PT_SOURCE_SSCOP;
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/*
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* Send PDU towards peer
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*/
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STACK_CALL(CPCS_UNITDATA_INV, sop->so_lower, sop->so_tokl,
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sop->so_connvc, (int)m, 0, err);
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if (err)
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KB_FREEALL(m);
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return (err);
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}
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/*
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* Build and send BGAK PDU
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*
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* A BGAK PDU will be constructed and passed down the protocol stack.
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* The SSCOP-UU/N(UU) field is not supported.
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*
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* Arguments:
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* sop pointer to sscop connection control block
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*
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* Returns:
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* 0 PDU successfully built and passed down the stack
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* else unable to build or send pdu
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*
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*/
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int
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sscop_send_bgak(sop)
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struct sscop *sop;
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{
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KBuffer *m;
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struct bgak_pdu *bp;
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int err;
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/*
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* Get buffer for PDU
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*/
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KB_ALLOCPKT(m, sizeof(struct bgak_pdu), KB_F_NOWAIT, KB_T_HEADER);
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if (m == NULL)
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return (1);
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/*
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* Setup buffer controls
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*/
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KB_HEADSET(m, MIN(sop->so_headout,
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KB_BFRLEN(m) - sizeof(struct bgak_pdu)));
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KB_LEN(m) = sizeof(struct bgak_pdu);
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/*
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* Build PDU
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*/
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KB_DATASTART(m, bp, struct bgak_pdu *);
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bp->bgak_rsvd = 0;
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bp->bgak_nmr =
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htonl((PT_BGAK << PT_TYPE_SHIFT) | SEQ_VAL(sop->so_rcvmax));
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/*
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* Send PDU towards peer
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*/
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STACK_CALL(CPCS_UNITDATA_INV, sop->so_lower, sop->so_tokl,
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sop->so_connvc, (int)m, 0, err);
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if (err)
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KB_FREEALL(m);
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return (err);
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}
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/*
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* Build and send BGREJ PDU
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*
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* A BGREJ PDU will be constructed and passed down the protocol stack.
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* The SSCOP-UU/N(UU) field is not supported.
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*
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* Arguments:
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* sop pointer to sscop connection control block
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*
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* Returns:
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* 0 PDU successfully built and passed down the stack
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* else unable to build or send pdu
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*
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*/
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int
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sscop_send_bgrej(sop)
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struct sscop *sop;
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{
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KBuffer *m;
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struct bgrej_pdu *bp;
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int err;
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/*
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* Get buffer for PDU
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*/
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KB_ALLOCPKT(m, sizeof(struct bgrej_pdu), KB_F_NOWAIT, KB_T_HEADER);
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if (m == NULL)
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return (1);
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/*
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* Setup buffer controls
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*/
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KB_HEADSET(m, MIN(sop->so_headout,
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KB_BFRLEN(m) - sizeof(struct bgrej_pdu)));
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KB_LEN(m) = sizeof(struct bgrej_pdu);
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/*
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* Build PDU
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*/
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KB_DATASTART(m, bp, struct bgrej_pdu *);
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bp->bgrej_rsvd2 = 0;
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*(u_int *)&bp->bgrej_type = htonl((PT_BGREJ << PT_TYPE_SHIFT) | 0);
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/*
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* Send PDU towards peer
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*/
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STACK_CALL(CPCS_UNITDATA_INV, sop->so_lower, sop->so_tokl,
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sop->so_connvc, (int)m, 0, err);
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if (err)
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KB_FREEALL(m);
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return (err);
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}
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/*
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* Build and send END PDU
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*
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* An END PDU will be constructed and passed down the protocol stack.
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* The SSCOP-UU/N(UU) field is not supported.
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*
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* Arguments:
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* sop pointer to sscop connection control block
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* source originator of END PDU
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*
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* Returns:
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* 0 PDU successfully built and passed down the stack
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* else unable to build or send pdu
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*
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*/
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int
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sscop_send_end(sop, source)
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struct sscop *sop;
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int source;
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{
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KBuffer *m;
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struct end_pdu *ep;
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int err;
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/*
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* Get buffer for PDU
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*/
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KB_ALLOCPKT(m, sizeof(struct end_pdu), KB_F_NOWAIT, KB_T_HEADER);
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if (m == NULL)
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return (1);
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/*
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* Setup buffer controls
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*/
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KB_HEADSET(m, MIN(sop->so_headout,
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KB_BFRLEN(m) - sizeof(struct end_pdu)));
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KB_LEN(m) = sizeof(struct end_pdu);
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/*
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* Build PDU
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*/
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KB_DATASTART(m, ep, struct end_pdu *);
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ep->end_rsvd2 = 0;
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*(u_int *)&ep->end_type = htonl((PT_END << PT_TYPE_SHIFT) | 0);
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if (source == SSCOP_SOURCE_SSCOP) {
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ep->end_type |= PT_SOURCE_SSCOP;
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sop->so_flags |= SOF_ENDSSCOP;
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} else if (source == SSCOP_SOURCE_USER)
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sop->so_flags &= ~SOF_ENDSSCOP;
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else if ((source == SSCOP_SOURCE_LAST) &&
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(sop->so_flags & SOF_ENDSSCOP))
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ep->end_type |= PT_SOURCE_SSCOP;
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/*
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* Send PDU towards peer
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*/
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STACK_CALL(CPCS_UNITDATA_INV, sop->so_lower, sop->so_tokl,
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sop->so_connvc, (int)m, 0, err);
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if (err)
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KB_FREEALL(m);
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return (err);
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}
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/*
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* Build and send ENDAK PDU
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*
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* An ENDAK PDU will be constructed and passed down the protocol stack.
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*
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* Arguments:
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* sop pointer to sscop connection control block
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*
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* Returns:
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* 0 PDU successfully built and passed down the stack
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* else unable to build or send pdu
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*
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*/
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int
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sscop_send_endak(sop)
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struct sscop *sop;
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{
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KBuffer *m;
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struct endak_q2110_pdu *e2p;
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struct endak_qsaal_pdu *esp;
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int err, size;
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/*
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* Get size of PDU
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*/
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if (sop->so_vers == SSCOP_VERS_QSAAL)
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size = sizeof(struct endak_qsaal_pdu);
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else
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size = sizeof(struct endak_q2110_pdu);
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/*
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* Get buffer for PDU
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*/
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KB_ALLOCPKT(m, size, KB_F_NOWAIT, KB_T_HEADER);
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if (m == NULL)
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return (1);
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/*
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* Setup buffer controls
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*/
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KB_HEADSET(m, MIN(sop->so_headout, KB_BFRLEN(m) - size));
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KB_LEN(m) = size;
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/*
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* Build PDU
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*/
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if (sop->so_vers == SSCOP_VERS_QSAAL) {
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KB_DATASTART(m, esp, struct endak_qsaal_pdu *);
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*(u_int *)&esp->endak_type =
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htonl((PT_ENDAK << PT_TYPE_SHIFT) | 0);
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} else {
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KB_DATASTART(m, e2p, struct endak_q2110_pdu *);
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e2p->endak_rsvd2 = 0;
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*(u_int *)&e2p->endak_type =
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htonl((PT_ENDAK << PT_TYPE_SHIFT) | 0);
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}
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/*
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* Send PDU towards peer
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*/
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STACK_CALL(CPCS_UNITDATA_INV, sop->so_lower, sop->so_tokl,
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sop->so_connvc, (int)m, 0, err);
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if (err)
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KB_FREEALL(m);
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return (err);
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}
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/*
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* Build and send RS PDU
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*
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* A RS PDU will be constructed and passed down the protocol stack.
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* The SSCOP-UU/N(UU) field is not supported.
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*
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* Arguments:
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* sop pointer to sscop connection control block
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*
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* Returns:
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* 0 PDU successfully built and passed down the stack
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* else unable to build or send pdu
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*
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*/
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int
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sscop_send_rs(sop)
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struct sscop *sop;
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{
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KBuffer *m;
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struct rs_pdu *rp;
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int err;
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/*
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* Get buffer for PDU
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*/
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KB_ALLOCPKT(m, sizeof(struct rs_pdu), KB_F_NOWAIT, KB_T_HEADER);
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if (m == NULL)
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return (1);
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/*
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* Setup buffer controls
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*/
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KB_HEADSET(m, MIN(sop->so_headout,
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KB_BFRLEN(m) - sizeof(struct rs_pdu)));
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KB_LEN(m) = sizeof(struct rs_pdu);
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/*
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* Build PDU
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*/
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KB_DATASTART(m, rp, struct rs_pdu *);
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*(int *)&rp->rs_rsvd[0] = 0;
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if (sop->so_vers != SSCOP_VERS_QSAAL) {
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rp->rs_nsq = sop->so_sendconn;
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rp->rs_nmr = htonl((PT_RS << PT_TYPE_SHIFT) |
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SEQ_VAL(sop->so_rcvmax));
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} else {
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rp->rs_nmr = htonl((PT_RS << PT_TYPE_SHIFT) | 0);
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}
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/*
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* Send PDU towards peer
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*/
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STACK_CALL(CPCS_UNITDATA_INV, sop->so_lower, sop->so_tokl,
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sop->so_connvc, (int)m, 0, err);
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if (err)
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KB_FREEALL(m);
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return (err);
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}
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/*
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* Build and send RSAK PDU
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*
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* An RSAK PDU will be constructed and passed down the protocol stack.
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*
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* Arguments:
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* sop pointer to sscop connection control block
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*
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* Returns:
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* 0 PDU successfully built and passed down the stack
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* else unable to build or send pdu
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*
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*/
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int
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sscop_send_rsak(sop)
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struct sscop *sop;
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{
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KBuffer *m;
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struct rsak_q2110_pdu *r2p;
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struct rsak_qsaal_pdu *rsp;
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int err, size;
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|
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/*
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* Get size of PDU
|
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*/
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if (sop->so_vers == SSCOP_VERS_QSAAL)
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size = sizeof(struct rsak_qsaal_pdu);
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else
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size = sizeof(struct rsak_q2110_pdu);
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|
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/*
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* Get buffer for PDU
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*/
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KB_ALLOCPKT(m, size, KB_F_NOWAIT, KB_T_HEADER);
|
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if (m == NULL)
|
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return (1);
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|
|
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/*
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* Setup buffer controls
|
|
*/
|
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KB_HEADSET(m, MIN(sop->so_headout, KB_BFRLEN(m) - size));
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KB_LEN(m) = size;
|
|
|
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/*
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* Build PDU
|
|
*/
|
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if (sop->so_vers == SSCOP_VERS_QSAAL) {
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KB_DATASTART(m, rsp, struct rsak_qsaal_pdu *);
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*(u_int *)&rsp->rsaks_type =
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htonl((PT_RSAK << PT_TYPE_SHIFT) | 0);
|
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} else {
|
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KB_DATASTART(m, r2p, struct rsak_q2110_pdu *);
|
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r2p->rsak_rsvd = 0;
|
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r2p->rsak_nmr = htonl((PT_RSAK << PT_TYPE_SHIFT) |
|
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SEQ_VAL(sop->so_rcvmax));
|
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}
|
|
|
|
/*
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|
* Send PDU towards peer
|
|
*/
|
|
STACK_CALL(CPCS_UNITDATA_INV, sop->so_lower, sop->so_tokl,
|
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sop->so_connvc, (int)m, 0, err);
|
|
|
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if (err)
|
|
KB_FREEALL(m);
|
|
|
|
return (err);
|
|
}
|
|
|
|
|
|
/*
|
|
* Build and send ER PDU
|
|
*
|
|
* An ER PDU will be constructed and passed down the protocol stack.
|
|
*
|
|
* Arguments:
|
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* sop pointer to sscop connection control block
|
|
*
|
|
* Returns:
|
|
* 0 PDU successfully built and passed down the stack
|
|
* else unable to build or send pdu
|
|
*
|
|
*/
|
|
int
|
|
sscop_send_er(sop)
|
|
struct sscop *sop;
|
|
{
|
|
KBuffer *m;
|
|
struct er_pdu *ep;
|
|
int err;
|
|
|
|
|
|
/*
|
|
* Get buffer for PDU
|
|
*/
|
|
KB_ALLOCPKT(m, sizeof(struct er_pdu), KB_F_NOWAIT, KB_T_HEADER);
|
|
if (m == NULL)
|
|
return (1);
|
|
|
|
/*
|
|
* Setup buffer controls
|
|
*/
|
|
KB_HEADSET(m, MIN(sop->so_headout,
|
|
KB_BFRLEN(m) - sizeof(struct er_pdu)));
|
|
KB_LEN(m) = sizeof(struct er_pdu);
|
|
|
|
/*
|
|
* Build PDU
|
|
*/
|
|
KB_DATASTART(m, ep, struct er_pdu *);
|
|
*(int *)&ep->er_rsvd[0] = 0;
|
|
ep->er_nsq = sop->so_sendconn;
|
|
ep->er_nmr = htonl((PT_ER << PT_TYPE_SHIFT) | SEQ_VAL(sop->so_rcvmax));
|
|
|
|
/*
|
|
* Send PDU towards peer
|
|
*/
|
|
STACK_CALL(CPCS_UNITDATA_INV, sop->so_lower, sop->so_tokl,
|
|
sop->so_connvc, (int)m, 0, err);
|
|
|
|
if (err)
|
|
KB_FREEALL(m);
|
|
|
|
return (err);
|
|
}
|
|
|
|
|
|
/*
|
|
* Build and send ERAK PDU
|
|
*
|
|
* An ERAK PDU will be constructed and passed down the protocol stack.
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection control block
|
|
*
|
|
* Returns:
|
|
* 0 PDU successfully built and passed down the stack
|
|
* else unable to build or send pdu
|
|
*
|
|
*/
|
|
int
|
|
sscop_send_erak(sop)
|
|
struct sscop *sop;
|
|
{
|
|
KBuffer *m;
|
|
struct erak_pdu *ep;
|
|
int err;
|
|
|
|
|
|
/*
|
|
* Get buffer for PDU
|
|
*/
|
|
KB_ALLOCPKT(m, sizeof(struct erak_pdu), KB_F_NOWAIT, KB_T_HEADER);
|
|
if (m == NULL)
|
|
return (1);
|
|
|
|
/*
|
|
* Setup buffer controls
|
|
*/
|
|
KB_HEADSET(m, MIN(sop->so_headout,
|
|
KB_BFRLEN(m) - sizeof(struct erak_pdu)));
|
|
KB_LEN(m) = sizeof(struct erak_pdu);
|
|
|
|
/*
|
|
* Build PDU
|
|
*/
|
|
KB_DATASTART(m, ep, struct erak_pdu *);
|
|
ep->erak_rsvd = 0;
|
|
ep->erak_nmr = htonl((PT_ERAK << PT_TYPE_SHIFT) |
|
|
SEQ_VAL(sop->so_rcvmax));
|
|
|
|
/*
|
|
* Send PDU towards peer
|
|
*/
|
|
STACK_CALL(CPCS_UNITDATA_INV, sop->so_lower, sop->so_tokl,
|
|
sop->so_connvc, (int)m, 0, err);
|
|
|
|
if (err)
|
|
KB_FREEALL(m);
|
|
|
|
return (err);
|
|
}
|
|
|
|
|
|
/*
|
|
* Build and send POLL PDU
|
|
*
|
|
* A POLL PDU will be constructed and passed down the protocol stack.
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection control block
|
|
*
|
|
* Returns:
|
|
* 0 PDU successfully built and passed down the stack
|
|
* else unable to build or send pdu
|
|
*
|
|
*/
|
|
int
|
|
sscop_send_poll(sop)
|
|
struct sscop *sop;
|
|
{
|
|
KBuffer *m;
|
|
struct poll_pdu *pp;
|
|
int err;
|
|
|
|
|
|
/*
|
|
* Get buffer for PDU
|
|
*/
|
|
KB_ALLOCPKT(m, sizeof(struct poll_pdu), KB_F_NOWAIT, KB_T_HEADER);
|
|
if (m == NULL)
|
|
return (1);
|
|
|
|
/*
|
|
* Setup buffer controls
|
|
*/
|
|
KB_HEADSET(m, MIN(sop->so_headout,
|
|
KB_BFRLEN(m) - sizeof(struct poll_pdu)));
|
|
KB_LEN(m) = sizeof(struct poll_pdu);
|
|
|
|
/*
|
|
* Build PDU
|
|
*/
|
|
KB_DATASTART(m, pp, struct poll_pdu *);
|
|
pp->poll_nps = htonl(SEQ_VAL(sop->so_pollsend));
|
|
pp->poll_ns = htonl((PT_POLL << PT_TYPE_SHIFT) | SEQ_VAL(sop->so_send));
|
|
|
|
/*
|
|
* Send PDU towards peer
|
|
*/
|
|
STACK_CALL(CPCS_UNITDATA_INV, sop->so_lower, sop->so_tokl,
|
|
sop->so_connvc, (int)m, 0, err);
|
|
|
|
if (err)
|
|
KB_FREEALL(m);
|
|
|
|
return (err);
|
|
}
|
|
|
|
|
|
/*
|
|
* STAT PDU Construction - Initialize for new PDU
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection control block
|
|
*
|
|
* Returns:
|
|
* addr pointer to initialized buffer
|
|
* 0 unable to allocate buffer
|
|
*
|
|
*/
|
|
static KBuffer *
|
|
sscop_stat_init(sop)
|
|
struct sscop *sop;
|
|
{
|
|
KBuffer *m;
|
|
|
|
#define STAT_INIT_SIZE (sizeof(struct stat_pdu) + 2 * sizeof(sscop_seq))
|
|
|
|
/*
|
|
* Get buffer for PDU
|
|
*/
|
|
KB_ALLOCPKT(m, STAT_INIT_SIZE, KB_F_NOWAIT, KB_T_HEADER);
|
|
if (m == NULL)
|
|
return (0);
|
|
|
|
/*
|
|
* Setup buffer controls
|
|
*/
|
|
KB_HEADSET(m, sop->so_headout < (KB_BFRLEN(m) - STAT_INIT_SIZE) ?
|
|
sop->so_headout : 0);
|
|
KB_LEN(m) = 0;
|
|
|
|
return (m);
|
|
#undef STAT_INIT_SIZE
|
|
}
|
|
|
|
|
|
/*
|
|
* STAT PDU Construction - Add List Element
|
|
*
|
|
* Arguments:
|
|
* elem sequence number to add to list
|
|
* m pointer to current buffer
|
|
*
|
|
* Returns:
|
|
* addr pointer to current buffer (updated)
|
|
* 0 buffer allocation failure
|
|
*
|
|
*/
|
|
static KBuffer *
|
|
sscop_stat_add(elem, m)
|
|
sscop_seq elem;
|
|
KBuffer *m;
|
|
{
|
|
KBuffer *n;
|
|
sscop_seq *sp;
|
|
int space;
|
|
|
|
/*
|
|
* See if new element will fit in current buffer
|
|
*/
|
|
KB_TAILROOM(m, space);
|
|
if (space < sizeof(elem)) {
|
|
|
|
/*
|
|
* Nope, so get another buffer
|
|
*/
|
|
KB_ALLOC(n, sizeof(elem), KB_F_NOWAIT, KB_T_DATA);
|
|
if (n == NULL)
|
|
return (0);
|
|
|
|
/*
|
|
* Link in new buffer
|
|
*/
|
|
KB_LINK(n, m);
|
|
KB_LEN(n) = 0;
|
|
m = n;
|
|
}
|
|
|
|
/*
|
|
* Add new element
|
|
*/
|
|
KB_DATAEND(m, sp, sscop_seq *);
|
|
*sp = htonl(elem);
|
|
KB_LEN(m) += sizeof (elem);
|
|
return (m);
|
|
}
|
|
|
|
|
|
/*
|
|
* STAT PDU Construction - Add Trailer and Send
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection control block
|
|
* nps received poll sequence number (POLL.N(PS))
|
|
* head pointer to head of buffer chain
|
|
* m pointer to current (last) buffer
|
|
*
|
|
* Returns:
|
|
* 0 STAT successfully sent
|
|
* else unable to send STAT or truncated STAT was sent - buffer freed
|
|
*
|
|
*/
|
|
static int
|
|
sscop_stat_end(sop, nps, head, m)
|
|
struct sscop *sop;
|
|
sscop_seq nps;
|
|
KBuffer *head;
|
|
KBuffer *m;
|
|
{
|
|
struct stat_pdu *sp;
|
|
KBuffer *n;
|
|
int err, space, trunc = 0;
|
|
|
|
/*
|
|
* See if PDU trailer will fit in current buffer
|
|
*/
|
|
KB_TAILROOM(m, space);
|
|
if (space < sizeof(struct stat_pdu)) {
|
|
|
|
/*
|
|
* Doesn't fit, so get another buffer
|
|
*/
|
|
KB_ALLOC(n, sizeof(struct stat_pdu), KB_F_NOWAIT, KB_T_DATA);
|
|
if (n == NULL) {
|
|
/*
|
|
* Out of buffers - truncate elements and send
|
|
* what we can, but tell caller that we can't
|
|
* send any more segments.
|
|
*/
|
|
trunc = 1;
|
|
do {
|
|
KB_LEN(m) -= sizeof(sscop_seq);
|
|
space += sizeof(sscop_seq);
|
|
} while (space < sizeof(struct stat_pdu));
|
|
} else {
|
|
/*
|
|
* Link in new buffer
|
|
*/
|
|
KB_LINK(n, m);
|
|
KB_LEN(n) = 0;
|
|
m = n;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Build PDU trailer
|
|
*/
|
|
KB_DATAEND(m, sp, struct stat_pdu *);
|
|
sp->stat_nps = htonl(nps);
|
|
sp->stat_nmr = htonl(sop->so_rcvmax);
|
|
sp->stat_nr = htonl(sop->so_rcvnext);
|
|
sp->stat_type = PT_STAT;
|
|
KB_LEN(m) += sizeof(struct stat_pdu);
|
|
|
|
/*
|
|
* Finally, send the STAT
|
|
*/
|
|
STACK_CALL(CPCS_UNITDATA_INV, sop->so_lower, sop->so_tokl,
|
|
sop->so_connvc, (int)head, 0, err);
|
|
|
|
if (err) {
|
|
/*
|
|
* We lie about the STACK_CALL failing...
|
|
*/
|
|
KB_FREEALL(head);
|
|
}
|
|
|
|
if (trunc)
|
|
return (1);
|
|
else
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Check for PDU in Receive Queue
|
|
*
|
|
* A receive queue will be searched for an SD PDU matching the requested
|
|
* sequence number. The caller must supply a pointer to the address of the
|
|
* PDU in the particular receive queue at which to begin the search. This
|
|
* function will update that pointer as it traverses the queue.
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection control block
|
|
* seq sequence number of PDU to locate
|
|
* currp address of pointer to PDU in receive queue to start search
|
|
*
|
|
* Returns:
|
|
* 0 reqeusted PDU not in receive queue
|
|
* 1 requested PDU located in receive queue
|
|
*
|
|
*/
|
|
static int
|
|
sscop_recv_locate(sop, seq, currp)
|
|
struct sscop *sop;
|
|
sscop_seq seq;
|
|
struct pdu_hdr **currp;
|
|
{
|
|
sscop_seq cs;
|
|
|
|
/*
|
|
* Search queue until we know the answer
|
|
*/
|
|
while (1) {
|
|
/*
|
|
* If we're at the end of the queue, the PDU isn't there
|
|
*/
|
|
if (*currp == NULL)
|
|
return (0);
|
|
|
|
/*
|
|
* Get the current PDU sequence number
|
|
*/
|
|
cs = (*currp)->ph_ns;
|
|
|
|
/*
|
|
* See if we're at the requested PDU
|
|
*/
|
|
if (seq == cs)
|
|
return (1);
|
|
|
|
/*
|
|
* If we're past the requested seq number,
|
|
* the PDU isn't there
|
|
*/
|
|
if (SEQ_LT(seq, cs, sop->so_rcvnext))
|
|
return (0);
|
|
|
|
/*
|
|
* Go to next PDU and keep looking
|
|
*/
|
|
*currp = (*currp)->ph_recv_lk;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Build and send STAT PDU
|
|
*
|
|
* A STAT PDU will be constructed and passed down the protocol stack.
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection control block
|
|
* nps received poll sequence number (POLL.N(PS))
|
|
*
|
|
* Returns:
|
|
* 0 PDU successfully built and passed down the stack
|
|
* else unable to build or send complete pdu
|
|
*
|
|
*/
|
|
int
|
|
sscop_send_stat(sop, nps)
|
|
struct sscop *sop;
|
|
sscop_seq nps;
|
|
{
|
|
KBuffer *head, *curr, *n;
|
|
struct pdu_hdr *rq = sop->so_recv_hd;
|
|
sscop_seq i;
|
|
sscop_seq vrh = sop->so_rcvhigh;
|
|
sscop_seq vrr = sop->so_rcvnext;
|
|
int len = 0;
|
|
|
|
/*
|
|
* Initialize for start of STAT PDU
|
|
*/
|
|
head = sscop_stat_init(sop);
|
|
if (head == NULL)
|
|
return (1);
|
|
curr = head;
|
|
|
|
/*
|
|
* Start with first PDU not yet received
|
|
*/
|
|
i = vrr;
|
|
|
|
/*
|
|
* Keep looping until we get to last sent PDU
|
|
*/
|
|
while (i != vrh) {
|
|
|
|
/*
|
|
* Find next missing PDU
|
|
*/
|
|
while (SEQ_LT(i, vrh, vrr) && sscop_recv_locate(sop, i, &rq)) {
|
|
SEQ_INCR(i, 1);
|
|
}
|
|
|
|
/*
|
|
* Add odd (start of missing gap) STAT element
|
|
*/
|
|
n = sscop_stat_add(i, curr);
|
|
if (n == NULL) {
|
|
goto nobufs;
|
|
}
|
|
curr = n;
|
|
len++;
|
|
|
|
/*
|
|
* Have we reached the last sent PDU sequence number??
|
|
*/
|
|
if (i == vrh) {
|
|
/*
|
|
* Yes, then we're done, send STAT
|
|
*/
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Have we reached the max STAT size yet??
|
|
*/
|
|
if (len >= PDU_MAX_ELEM) {
|
|
/*
|
|
* Yes, send this STAT segment
|
|
*/
|
|
if (sscop_stat_end(sop, nps, head, curr)) {
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Start a new segment
|
|
*/
|
|
head = sscop_stat_init(sop);
|
|
if (head == NULL)
|
|
return (1);
|
|
curr = head;
|
|
|
|
/*
|
|
* Restart missing gap
|
|
*/
|
|
curr = sscop_stat_add(i, curr);
|
|
if (curr == NULL) {
|
|
KB_FREEALL(head);
|
|
return (1);
|
|
}
|
|
len = 1;
|
|
}
|
|
|
|
/*
|
|
* Now find the end of the missing gap
|
|
*/
|
|
do {
|
|
SEQ_INCR(i, 1);
|
|
} while (SEQ_LT(i, vrh, vrr) &&
|
|
(sscop_recv_locate(sop, i, &rq) == 0));
|
|
|
|
/*
|
|
* Add even (start of received gap) STAT element
|
|
*/
|
|
n = sscop_stat_add(i, curr);
|
|
if (n == NULL) {
|
|
goto nobufs;
|
|
}
|
|
curr = n;
|
|
len++;
|
|
}
|
|
|
|
/*
|
|
* Finally, send the STAT PDU (or last STAT segment)
|
|
*/
|
|
if (sscop_stat_end(sop, nps, head, curr)) {
|
|
return (1);
|
|
}
|
|
|
|
return (0);
|
|
|
|
nobufs:
|
|
/*
|
|
* Send a truncated STAT PDU
|
|
*/
|
|
sscop_stat_end(sop, nps, head, curr);
|
|
|
|
return (1);
|
|
}
|
|
|
|
|
|
/*
|
|
* Build and send USTAT PDU
|
|
*
|
|
* A USTAT PDU will be constructed and passed down the protocol stack.
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection control block
|
|
* ns sequence number for second list element
|
|
*
|
|
* Returns:
|
|
* 0 PDU successfully built and passed down the stack
|
|
* else unable to build or send pdu
|
|
*
|
|
*/
|
|
int
|
|
sscop_send_ustat(sop, ns)
|
|
struct sscop *sop;
|
|
sscop_seq ns;
|
|
{
|
|
KBuffer *m;
|
|
struct ustat_pdu *up;
|
|
int err;
|
|
|
|
|
|
/*
|
|
* Get buffer for PDU
|
|
*/
|
|
KB_ALLOCPKT(m, sizeof(struct ustat_pdu), KB_F_NOWAIT, KB_T_HEADER);
|
|
if (m == NULL)
|
|
return (1);
|
|
|
|
/*
|
|
* Setup buffer controls
|
|
*/
|
|
KB_HEADSET(m, MIN(sop->so_headout,
|
|
KB_BFRLEN(m) - sizeof(struct ustat_pdu)));
|
|
KB_LEN(m) = sizeof(struct ustat_pdu);
|
|
|
|
/*
|
|
* Build PDU
|
|
*/
|
|
KB_DATASTART(m, up, struct ustat_pdu *);
|
|
up->ustat_le1 = htonl(SEQ_VAL(sop->so_rcvhigh));
|
|
up->ustat_le2 = htonl(SEQ_VAL(ns));
|
|
up->ustat_nmr = htonl(SEQ_VAL(sop->so_rcvmax));
|
|
up->ustat_nr =
|
|
htonl((PT_USTAT << PT_TYPE_SHIFT) | SEQ_VAL(sop->so_rcvnext));
|
|
|
|
/*
|
|
* Send PDU towards peer
|
|
*/
|
|
STACK_CALL(CPCS_UNITDATA_INV, sop->so_lower, sop->so_tokl,
|
|
sop->so_connvc, (int)m, 0, err);
|
|
|
|
if (err)
|
|
KB_FREEALL(m);
|
|
|
|
return (err);
|
|
}
|
|
|
|
|
|
/*
|
|
* Build and send UD PDU
|
|
*
|
|
* A UD PDU will be constructed and passed down the protocol stack.
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection control block
|
|
* m pointer to user data buffer chain
|
|
*
|
|
* Returns:
|
|
* 0 PDU successfully built and passed down the stack
|
|
* else unable to build or send pdu (buffer released)
|
|
*
|
|
*/
|
|
int
|
|
sscop_send_ud(sop, m)
|
|
struct sscop *sop;
|
|
KBuffer *m;
|
|
{
|
|
KBuffer *ml, *n;
|
|
int len = 0, err;
|
|
int pad, trlen, space;
|
|
u_char *cp;
|
|
|
|
/*
|
|
* Count data and get to last buffer in chain
|
|
*/
|
|
for (ml = m; ; ml = KB_NEXT(ml)) {
|
|
len += KB_LEN(ml);
|
|
if (KB_NEXT(ml) == NULL)
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Verify data length
|
|
*/
|
|
if (len > sop->so_parm.sp_maxinfo) {
|
|
KB_FREEALL(m);
|
|
sscop_abort(sop, "sscop: maximum unitdata size exceeded\n");
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Figure out how much padding we'll need
|
|
*/
|
|
pad = ((len + (PDU_PAD_ALIGN - 1)) & ~(PDU_PAD_ALIGN - 1)) - len;
|
|
trlen = pad + sizeof(struct ud_pdu);
|
|
|
|
/*
|
|
* Get space for PDU trailer and padding
|
|
*/
|
|
KB_TAILROOM(ml, space);
|
|
if (space < trlen) {
|
|
/*
|
|
* Allocate & link buffer for pad and trailer
|
|
*/
|
|
KB_ALLOC(n, trlen, KB_F_NOWAIT, KB_T_HEADER);
|
|
if (n == NULL)
|
|
return (1);
|
|
|
|
KB_LEN(n) = 0;
|
|
KB_LINK(n, ml);
|
|
ml = n;
|
|
}
|
|
|
|
/*
|
|
* Build the PDU trailer
|
|
*
|
|
* Since we can't be sure of alignment in the buffers, we
|
|
* have to move this a byte at a time.
|
|
*/
|
|
KB_DATAEND(ml, cp, u_char *);
|
|
cp += pad;
|
|
*cp++ = (pad << PT_PAD_SHIFT) | PT_UD;
|
|
KM_ZERO(cp, 3);
|
|
KB_LEN(ml) += trlen;
|
|
|
|
/*
|
|
* Now pass PDU down the stack
|
|
*/
|
|
STACK_CALL(CPCS_UNITDATA_INV, sop->so_lower, sop->so_tokl,
|
|
sop->so_connvc, (int)m, 0, err);
|
|
if (err) {
|
|
KB_FREEALL(m);
|
|
return (1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Print an SSCOP PDU
|
|
*
|
|
* Arguments:
|
|
* sop pointer to sscop connection control block
|
|
* m pointer to pdu buffer chain
|
|
* msg pointer to message string
|
|
*
|
|
* Returns:
|
|
* none
|
|
*
|
|
*/
|
|
void
|
|
sscop_pdu_print(sop, m, msg)
|
|
struct sscop *sop;
|
|
KBuffer *m;
|
|
char *msg;
|
|
{
|
|
char buf[128];
|
|
struct vccb *vcp;
|
|
|
|
vcp = sop->so_connvc->cvc_vcc;
|
|
snprintf(buf, sizeof(buf),
|
|
"sscop %s: vcc=(%d,%d)\n", msg, vcp->vc_vpi, vcp->vc_vci);
|
|
atm_pdu_print(m, buf);
|
|
}
|
|
|