/* * * =================================== * 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. * * @(#) $Id: sscop.c,v 1.6 1998/03/24 21:10:43 mks Exp $ * */ /* * ATM Forum UNI Support * --------------------- * * Service Specific Connection Oriented Protocol (SSCOP) * */ #ifndef lint static char *RCSid = "@(#) $Id: sscop.c,v 1.6 1998/03/24 21:10:43 mks Exp $"; #endif #include #include #include #include #include #include /* * Global variables */ int sscop_vccnt = 0; struct sscop *sscop_head = NULL; struct sscop_stat sscop_stat = {0}; struct atm_time sscop_timer = {0, 0}; struct sp_info sscop_pool = { "sscop pool", /* si_name */ sizeof(struct sscop), /* si_blksiz */ 5, /* si_blkcnt */ 100 /* si_maxallow */ }; /* * Local functions */ static int sscop_inst __P((struct stack_defn **, Atm_connvc *)); /* * Local variables */ static struct stack_defn sscop_service = { NULL, SAP_SSCOP, 0, sscop_inst, sscop_lower, sscop_upper, 0 }; static struct t_atm_cause sscop_cause = { T_ATM_ITU_CODING, T_ATM_LOC_USER, T_ATM_CAUSE_TEMPORARY_FAILURE, {0, 0, 0, 0} }; static u_char sscop_maa_log[MAA_ERROR_COUNT] = { 1, /* A */ 1, /* B */ 1, /* C */ 1, /* D */ 1, /* E */ 1, /* F */ 1, /* G */ 1, /* H */ 1, /* I */ 1, /* J */ 1, /* K */ 1, /* L */ 1, /* M */ 0, /* N */ 0, /* O */ 0, /* P */ 1, /* Q */ 1, /* R */ 1, /* S */ 1, /* T */ 1, /* U */ 0, /* V */ 0, /* W */ 0, /* X */ 1 /* INVAL */ }; /* * Initialize SSCOP processing * * This will be called during module loading. We will register our stack * service and wait for someone to talk to us. * * Arguments: * none * * Returns: * 0 initialization was successful * errno initialization failed - reason indicated * */ int sscop_start() { int err = 0; /* * Register stack service */ if (err = atm_stack_register(&sscop_service)) goto done; /* * Start up timer */ atm_timeout(&sscop_timer, ATM_HZ/SSCOP_HZ, sscop_timeout); done: return (err); } /* * Terminate SSCOP processing * * This will be called just prior to unloading the module from memory. All * signalling instances should have been terminated by now, so we just free * up all of our resources. * * Called at splnet. * * Arguments: * none * * Returns: * 0 termination was successful * errno termination failed - reason indicated * */ int sscop_stop() { int err = 0; /* * Any connections still exist?? */ if (sscop_vccnt) { /* * Yes, can't stop yet */ return (EBUSY); } /* * Stop our timer */ (void) atm_untimeout(&sscop_timer); /* * Deregister the stack service */ (void) atm_stack_deregister(&sscop_service); /* * Free our storage pools */ atm_release_pool(&sscop_pool); done: return (err); } /* * SSCOP Stack Instantiation * * Called at splnet. * * Arguments: * ssp pointer to array of stack definition pointers for connection * ssp[0] points to upper layer's stack service definition * ssp[1] points to this layer's stack service definition * ssp[2] points to lower layer's stack service definition * cvp pointer to connection vcc for this stack * * Returns: * 0 instantiation successful * errno instantiation failed - reason indicated * */ static int sscop_inst(ssp, cvp) struct stack_defn **ssp; Atm_connvc *cvp; { struct stack_defn *sdp_up = ssp[0], *sdp_me = ssp[1], *sdp_low = ssp[2]; struct sscop *sop; int err; ATM_DEBUG2("sscop_inst: ssp=0x%x, cvp=0x%x\n", ssp, cvp); /* * Validate lower SAP */ if ((sdp_low->sd_sap & SAP_CLASS_MASK) != SAP_CPCS) return (EINVAL); /* * Allocate our control block */ sop = (struct sscop *)atm_allocate(&sscop_pool); if (sop == NULL) return (ENOMEM); sop->so_state = SOS_INST; sop->so_connvc = cvp; sop->so_toku = sdp_up->sd_toku; sop->so_upper = sdp_up->sd_upper; /* * Store my token into service definition */ sdp_me->sd_toku = sop; /* * Update and save input buffer headroom */ HEADIN(cvp, sizeof(struct pdu_hdr), 0); /* sop->so_headin = cvp->cvc_attr.headin; */ /* * Pass instantiation down the stack */ err = sdp_low->sd_inst(ssp + 1, cvp); if (err) { /* * Lower layer instantiation failed, free our resources */ atm_free((caddr_t)sop); return (err); } /* * Link in connection block */ LINK2TAIL(sop, struct sscop, sscop_head, so_next); sscop_vccnt++; sscop_stat.sos_connects++; /* * Save and update output buffer headroom */ sop->so_headout = cvp->cvc_attr.headout; HEADOUT(cvp, sizeof(struct pdu_hdr), 0); /* * Save lower layer's interface info */ sop->so_lower = sdp_low->sd_lower; sop->so_tokl = sdp_low->sd_toku; /* * Initialize version (until INIT received) */ sop->so_vers = SSCOP_VERS_Q2110; return (0); } /* * Report Management Error * * Called to report an error to the layer management entity. * * Arguments: * sop pointer to sscop control block * code error code * * Returns: * none * */ void sscop_maa_error(sop, code) struct sscop *sop; int code; { int i; /* * Validate error code */ if ((code < MAA_ERROR_MIN) || (code > MAA_ERROR_MAX)) code = MAA_ERROR_INVAL; i = code - MAA_ERROR_MIN; /* * Bump statistics counters */ sscop_stat.sos_maa_error[i]++; /* * Log error message */ if (sscop_maa_log[i] != 0) { struct vccb *vcp = sop->so_connvc->cvc_vcc; struct atm_pif *pip = vcp->vc_pif; log(LOG_ERR, "sscop_maa_error: intf=%s%d vpi=%d vci=%d code=%c state=%d\n", pip->pif_name, pip->pif_unit, vcp->vc_vpi, vcp->vc_vci, code, sop->so_state); } } /* * Abort an SSCOP connection * * Called when an unrecoverable or "should never happen" error occurs. * We log a message, send an END PDU to our peer and request the signalling * manager to abort the connection. * * Arguments: * sop pointer to sscop control block * msg pointer to error message * * Returns: * none * */ void sscop_abort(sop, msg) struct sscop *sop; char *msg; { Atm_connvc *cvp = sop->so_connvc; /* * Log and count error */ log(LOG_ERR, msg); sscop_stat.sos_aborts++; /* * Send an END PDU as a courtesy to peer */ (void) sscop_send_end(sop, SSCOP_SOURCE_SSCOP); /* * Set termination state */ sop->so_state = SOS_TERM; /* * Flush all of our queues */ sscop_xmit_drain(sop); sscop_rcvr_drain(sop); /* * Tell Connection Manager to abort this connection */ (void) atm_cm_abort(cvp, &sscop_cause); }