858 lines
17 KiB
C
858 lines
17 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 3.0/3.1 Signalling Manager
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* ----------------------------------------
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*
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* Signalling manager finite state machine
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*
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*/
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#include <netatm/kern_include.h>
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#include <netatm/uni/uni.h>
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#include <netatm/uni/unisig.h>
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#include <netatm/uni/unisig_var.h>
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#include <netatm/uni/unisig_msg.h>
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#include <netatm/uni/unisig_mbuf.h>
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#include <netatm/uni/unisig_decode.h>
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#include <netatm/uni/sscf_uni.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 int unisig_sigmgr_invalid __P((struct unisig *, KBuffer *));
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static int unisig_sigmgr_act01 __P((struct unisig *, KBuffer *));
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static int unisig_sigmgr_act02 __P((struct unisig *, KBuffer *));
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static int unisig_sigmgr_act03 __P((struct unisig *, KBuffer *));
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static int unisig_sigmgr_act04 __P((struct unisig *, KBuffer *));
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static int unisig_sigmgr_act05 __P((struct unisig *, KBuffer *));
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static int unisig_sigmgr_act06 __P((struct unisig *, KBuffer *));
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static int unisig_sigmgr_act07 __P((struct unisig *, KBuffer *));
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static int unisig_sigmgr_act08 __P((struct unisig *, KBuffer *));
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static int unisig_sigmgr_act09 __P((struct unisig *, KBuffer *));
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static int unisig_sigmgr_act10 __P((struct unisig *, KBuffer *));
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static int unisig_sigmgr_act11 __P((struct unisig *, KBuffer *));
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static int unisig_sigmgr_act12 __P((struct unisig *, KBuffer *));
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static int unisig_sigmgr_act13 __P((struct unisig *, KBuffer *));
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static int unisig_sigmgr_act14 __P((struct unisig *, KBuffer *));
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/*
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* State table.
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*/
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static int sigmgr_state_table[10][7] = {
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/* 0 1 2 3 4 5 */
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{ 1, 0, 0, 0, 0 }, /* 0 - Time out */
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{ 0, 0, 3, 5, 0 }, /* 1 - SSCF estab ind */
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{ 0, 0, 3, 5, 0 }, /* 2 - SSCF estab cnf */
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{ 0, 0, 4, 6, 0 }, /* 3 - SSCF release ind */
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{ 0, 0, 0, 6, 0 }, /* 4 - SSCF release cnf */
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{ 0, 0, 0, 7, 0 }, /* 5 - SSCF data ind */
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{ 0, 0, 2, 2, 0 }, /* 6 - SSCF unit data ind */
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{ 0, 0, 8, 8, 8 }, /* 7 - Call cleared */
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{ 14, 14, 14, 14, 0 }, /* 8 - Detach */
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{ 13, 13, 0, 0, 0 } /* 9 - Address set */
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};
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/*
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* Action vector
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*/
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#define MAX_ACTION 15
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static int (*unisig_sigmgr_act_vec[MAX_ACTION])
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__P((struct unisig *, KBuffer *)) = {
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unisig_sigmgr_invalid,
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unisig_sigmgr_act01,
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unisig_sigmgr_act02,
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unisig_sigmgr_act03,
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unisig_sigmgr_act04,
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unisig_sigmgr_act05,
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unisig_sigmgr_act06,
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unisig_sigmgr_act07,
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unisig_sigmgr_act08,
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unisig_sigmgr_act09,
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unisig_sigmgr_act10,
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unisig_sigmgr_act11,
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unisig_sigmgr_act12,
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unisig_sigmgr_act13,
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unisig_sigmgr_act14
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};
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/*
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* ATM endpoint for UNI signalling channel
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*/
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static Atm_endpoint unisig_endpt = {
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NULL, /* ep_next */
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ENDPT_UNI_SIG, /* ep_id */
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NULL, /* ep_ioctl */
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unisig_getname, /* ep_getname */
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unisig_connected, /* ep_connected */
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unisig_cleared, /* ep_cleared */
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NULL, /* ep_incoming */
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NULL, /* ep_addparty */
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NULL, /* ep_dropparty */
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NULL, /* ep_cpcs_ctl */
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NULL, /* ep_cpcs_data */
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unisig_saal_ctl, /* ep_saal_ctl */
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unisig_saal_data, /* ep_saal_data */
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NULL, /* ep_sscop_ctl */
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NULL /* ep_sscop_data */
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};
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/*
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* ATM connection attributes for UNI signalling channel
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*/
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static Atm_attributes unisig_attr = {
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NULL, /* nif */
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CMAPI_SAAL, /* api */
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UNI_VERS_3_0, /* api_init */
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0, /* headin */
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0, /* headout */
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{ /* aal */
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T_ATM_PRESENT, /* aal.tag */
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ATM_AAL5 /* aal.aal_type */
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},
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{ /* traffic */
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T_ATM_PRESENT, /* traffic.tag */
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{ /* traffic.v */
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{ /* traffic.v.forward */
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T_ATM_ABSENT, /* PCR_high */
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0, /* PCR_all */
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T_ATM_ABSENT, /* SCR_high */
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T_ATM_ABSENT, /* SCR_all */
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T_ATM_ABSENT, /* MBS_high */
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T_ATM_ABSENT, /* MBS_all */
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T_NO, /* tagging */
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},
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{ /* traffic.v.backward */
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T_ATM_ABSENT, /* PCR_high */
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0, /* PCR_all */
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T_ATM_ABSENT, /* SCR_high */
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T_ATM_ABSENT, /* SCR_all */
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T_ATM_ABSENT, /* MBS_high */
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T_ATM_ABSENT, /* MBS_all */
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T_NO, /* tagging */
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},
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T_YES, /* best_effort */
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}
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},
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{ /* bearer */
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T_ATM_PRESENT, /* bearer.tag */
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{ /* bearer.v */
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T_ATM_CLASS_X, /* class */
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T_ATM_NULL, /* traffic_type */
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T_ATM_NO_END_TO_END, /* timing_req */
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T_NO, /* clipping */
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T_ATM_1_TO_1, /* conn_conf */
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}
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},
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{ /* bhli */
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T_ATM_ABSENT, /* bhli.tag */
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},
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{ /* blli */
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T_ATM_ABSENT, /* blli.tag_l2 */
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T_ATM_ABSENT, /* blli.tag_l3 */
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},
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{ /* llc */
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T_ATM_ABSENT, /* llc.tag */
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},
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{ /* called */
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T_ATM_PRESENT, /* called.tag */
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},
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{ /* calling */
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T_ATM_ABSENT, /* calling.tag */
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},
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{ /* qos */
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T_ATM_PRESENT, /* qos.tag */
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{ /* qos.v */
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T_ATM_NETWORK_CODING, /* coding_standard */
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{ /* qos.v.forward */
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T_ATM_QOS_CLASS_0, /* class */
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},
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{ /* qos.v.backward */
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T_ATM_QOS_CLASS_0, /* class */
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}
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}
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},
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{ /* transit */
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T_ATM_ABSENT, /* transit.tag */
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},
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{ /* cause */
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T_ATM_ABSENT, /* cause.tag */
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}
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};
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/*
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* Finite state machine for the UNISIG signalling manager
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*
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* Arguments:
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* usp pointer to the UNISIG protocol control block
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* event indication of the event to be processed
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* m pointer to a buffer with a message (optional)
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*
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* Returns:
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* 0 success
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* errno error encountered
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*
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*/
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int
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unisig_sigmgr_state(usp, event, m)
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struct unisig *usp;
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int event;
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KBuffer *m;
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{
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int action, err = 0;
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/*
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* Cancel any signalling manager timer
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*/
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UNISIG_CANCEL(usp);
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/*
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* Select an action based on the incoming event and
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* the signalling manager's state
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*/
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action = sigmgr_state_table[event][usp->us_state];
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ATM_DEBUG4("unisig_sigmgr_state: usp=%p, state=%d, event=%d, action=%d\n",
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usp, usp->us_state, event, action);
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if (action >= MAX_ACTION || action < 0) {
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panic("unisig_sigmgr_state: invalid action\n");
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}
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/*
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* Perform the requested action
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*/
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err = unisig_sigmgr_act_vec[action](usp, m);
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return(err);
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}
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/*
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* Signalling manager state machine action 0
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*
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* Invalid action
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*
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* Arguments:
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* usp pointer to the UNISIG protocol control block
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* m buffer pointer (may be NULL)
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*
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* Returns:
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* 0 success
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* errno error encountered
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*
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*/
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static int
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unisig_sigmgr_invalid(usp, m)
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struct unisig *usp;
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KBuffer *m;
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{
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log(LOG_ERR, "unisig_sigmgr_state: unexpected action\n");
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if (m)
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KB_FREEALL(m);
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return(0);
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}
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/*
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* Signalling manager state machine action 1
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*
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* The kickoff timer has expired at attach time; go to
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* UNISIG_ADDR_WAIT state.
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*
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* Arguments:
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* usp pointer to the UNISIG protocol control block
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* m buffer pointer (may be NULL)
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*
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* Returns:
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* 0 success
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* errno error encountered
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*
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*/
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static int
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unisig_sigmgr_act01(usp, m)
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struct unisig *usp;
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KBuffer *m;
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{
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/*
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* Set the new state
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*/
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usp->us_state = UNISIG_ADDR_WAIT;
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return(0);
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}
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/*
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* Signalling manager state machine action 2
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*
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* Ignore the event
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*
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* Arguments:
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* usp pointer to the UNISIG protocol control block
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* m buffer pointer (may be NULL)
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*
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* Returns:
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* 0 success
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* errno error encountered
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*
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*/
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static int
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unisig_sigmgr_act02(usp, m)
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struct unisig *usp;
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KBuffer *m;
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{
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/*
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* Ignore event, discard message if present
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*/
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if (m)
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KB_FREEALL(m);
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return(0);
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}
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/*
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* Signalling manager state machine action 3
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*
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* SSCF session on signalling channel has come up
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*
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* Arguments:
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* usp pointer to the UNISIG protocol control block
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* m buffer pointer (may be NULL)
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*
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* Returns:
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* 0 success
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* errno error encountered
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*
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*/
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static int
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unisig_sigmgr_act03(usp, m)
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struct unisig *usp;
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KBuffer *m;
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{
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struct unisig_vccb *uvp, *vnext;
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/*
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* Log the activation
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*/
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log(LOG_INFO, "unisig: signalling channel active\n");
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/*
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* Go to ACTIVE state
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*/
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usp->us_state = UNISIG_ACTIVE;
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/*
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* Notify the VC state machine that the channel is up
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*/
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for (uvp = Q_HEAD(usp->us_vccq, struct unisig_vccb);
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uvp; uvp = vnext) {
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vnext = Q_NEXT(uvp, struct unisig_vccb, uv_sigelem);
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(void) unisig_vc_state(usp, uvp, UNI_VC_SAAL_ESTAB,
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(struct unisig_msg *) 0);
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}
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return(0);
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}
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/*
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* Signalling manager state machine action 4
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*
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* A SSCF release indication was received. Try to establish an
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* SSCF session on the signalling PVC.
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*
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* Arguments:
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* usp pointer to the UNISIG protocol control block
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* m buffer pointer (may be NULL)
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*
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* Returns:
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* 0 success
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* errno error encountered
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*
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*/
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static int
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unisig_sigmgr_act04(usp, m)
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struct unisig *usp;
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KBuffer *m;
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{
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int err;
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/*
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* Try to establish an SSCF session.
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*/
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err = atm_cm_saal_ctl(SSCF_UNI_ESTABLISH_REQ,
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usp->us_conn,
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(void *)0);
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if (err)
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panic("unisig_sigmgr_act04: SSCF_UNI_ESTABLISH_REQ");
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return(0);
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}
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/*
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* Signalling manager state machine action 5
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*
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* SSCF session on signalling channel has been reset
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*
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* Arguments:
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* usp pointer to the UNISIG protocol control block
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* m buffer pointer (may be NULL)
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*
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* Returns:
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* 0 success
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* errno error encountered
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*
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*/
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static int
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unisig_sigmgr_act05(usp, m)
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struct unisig *usp;
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KBuffer *m;
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{
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struct unisig_vccb *uvp, *vnext;
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/*
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* Log the reset
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*/
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log(LOG_INFO, "unisig: signalling channel reset\n");
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/*
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* Notify the VC state machine of the reset
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*/
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for (uvp = Q_HEAD(usp->us_vccq, struct unisig_vccb);
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uvp; uvp = vnext) {
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vnext = Q_NEXT(uvp, struct unisig_vccb, uv_sigelem);
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(void) unisig_vc_state(usp, uvp, UNI_VC_SAAL_ESTAB,
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(struct unisig_msg *) 0);
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}
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return(0);
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}
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/*
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* Signalling manager state machine action 6
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*
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* SSCF session on signalling channel has been lost
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*
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* Arguments:
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* usp pointer to the UNISIG protocol control block
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* m buffer pointer (may be NULL)
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*
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* Returns:
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* 0 success
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* errno error encountered
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*
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*/
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static int
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unisig_sigmgr_act06(usp, m)
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struct unisig *usp;
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KBuffer *m;
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{
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struct unisig_vccb *uvp, *vnext;
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/*
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* Log the fact that the session has been lost
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*/
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log(LOG_INFO, "unisig: signalling channel SSCF session lost\n");
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/*
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* Notify the VC state machine of the loss
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*/
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for (uvp = Q_HEAD(usp->us_vccq, struct unisig_vccb);
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uvp; uvp = vnext) {
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vnext = Q_NEXT(uvp, struct unisig_vccb, uv_sigelem);
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(void) unisig_vc_state(usp, uvp, UNI_VC_SAAL_FAIL,
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(struct unisig_msg *) 0);
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}
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/*
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* Try to restart the SSCF session
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*/
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(void) unisig_sigmgr_act04(usp, (KBuffer *) 0);
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/*
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* Go to INIT state
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*/
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usp->us_state = UNISIG_INIT;
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return(0);
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}
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/*
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* Signalling manager state machine action 7
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*
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* A Q.2931 signalling message has been received
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*
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* Arguments:
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* usp pointer to the UNISIG protocol control block
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* m buffer pointer (may be NULL)
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*
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* Returns:
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* 0 success
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* errno error encountered
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*
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*/
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static int
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unisig_sigmgr_act07(usp, m)
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struct unisig *usp;
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KBuffer *m;
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{
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int err;
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/*
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* Pass the Q.2931 signalling message on
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* to the VC state machine
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*/
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err = unisig_rcv_msg(usp, m);
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return(err);
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}
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/*
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* Signalling manager state machine action 8
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*
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* Process a CALL_CLOSED event for the signalling PVC
|
|
*
|
|
* Arguments:
|
|
* usp pointer to the UNISIG protocol control block
|
|
* m buffer pointer (may be NULL)
|
|
*
|
|
* Returns:
|
|
* 0 success
|
|
* errno error encountered
|
|
*
|
|
*/
|
|
static int
|
|
unisig_sigmgr_act08(usp, m)
|
|
struct unisig *usp;
|
|
KBuffer *m;
|
|
{
|
|
|
|
/*
|
|
* Signalling manager is now incommunicado
|
|
*/
|
|
if (usp->us_state != UNISIG_DETACH) {
|
|
/*
|
|
* Log an error and set the state to NULL if
|
|
* we're not detaching
|
|
*/
|
|
log(LOG_ERR, "unisig: signalling channel closed\n");
|
|
usp->us_state = UNISIG_NULL;
|
|
}
|
|
usp->us_conn = 0;
|
|
|
|
return(0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Signalling manager state machine action 9
|
|
*
|
|
* Not used
|
|
*
|
|
* Arguments:
|
|
* usp pointer to the UNISIG protocol control block
|
|
* m buffer pointer (may be NULL)
|
|
*
|
|
* Returns:
|
|
* 0 success
|
|
* errno error encountered
|
|
*
|
|
*/
|
|
static int
|
|
unisig_sigmgr_act09(usp, m)
|
|
struct unisig *usp;
|
|
KBuffer *m;
|
|
{
|
|
log(LOG_ERR, "unisig_sigmgr_act09: unexpected action\n");
|
|
if (m)
|
|
KB_FREEALL(m);
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Signalling manager state machine action 10
|
|
*
|
|
* Not used
|
|
*
|
|
* Arguments:
|
|
* usp pointer to the UNISIG protocol control block
|
|
* m buffer pointer (may be NULL)
|
|
*
|
|
* Returns:
|
|
* 0 success
|
|
* errno error encountered
|
|
*
|
|
*/
|
|
static int
|
|
unisig_sigmgr_act10(usp, m)
|
|
struct unisig *usp;
|
|
KBuffer *m;
|
|
{
|
|
return(0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Signalling manager state machine action 11
|
|
*
|
|
* Not used
|
|
*
|
|
* Arguments:
|
|
* usp pointer to the UNISIG protocol control block
|
|
* m buffer pointer (may be NULL)
|
|
*
|
|
* Returns:
|
|
* 0 success
|
|
* errno error encountered
|
|
*
|
|
*/
|
|
static int
|
|
unisig_sigmgr_act11(usp, m)
|
|
struct unisig *usp;
|
|
KBuffer *m;
|
|
{
|
|
log(LOG_ERR, "unisig_sigmgr_act11: unexpected action\n");
|
|
if (m)
|
|
KB_FREEALL(m);
|
|
return(0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Signalling manager state machine action 12
|
|
*
|
|
* Not used
|
|
*
|
|
* Arguments:
|
|
* usp pointer to the UNISIG protocol control block
|
|
* m buffer pointer (may be NULL)
|
|
*
|
|
* Returns:
|
|
* 0 success
|
|
* errno error encountered
|
|
*
|
|
*/
|
|
static int
|
|
unisig_sigmgr_act12(usp, m)
|
|
struct unisig *usp;
|
|
KBuffer *m;
|
|
{
|
|
log(LOG_ERR, "unisig_sigmgr_act11: unexpected action\n");
|
|
if (m)
|
|
KB_FREEALL(m);
|
|
return(0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Signalling manager state machine action 13
|
|
*
|
|
* NSAP prefix has been set
|
|
*
|
|
* Arguments:
|
|
* usp pointer to the UNISIG protocol control block
|
|
* m buffer pointer (may be NULL)
|
|
*
|
|
* Returns:
|
|
* 0 success
|
|
* errno error encountered
|
|
*
|
|
*/
|
|
static int
|
|
unisig_sigmgr_act13(usp, m)
|
|
struct unisig *usp;
|
|
KBuffer *m;
|
|
{
|
|
int err;
|
|
Atm_addr_pvc *pvcp;
|
|
|
|
/*
|
|
* Set UNI signalling channel connection attributes
|
|
*/
|
|
if (usp->us_proto == ATM_SIG_UNI30)
|
|
unisig_attr.api_init = UNI_VERS_3_0;
|
|
else
|
|
unisig_attr.api_init = UNI_VERS_3_1;
|
|
|
|
unisig_attr.nif = usp->us_pif->pif_nif;
|
|
|
|
unisig_attr.aal.v.aal5.forward_max_SDU_size = ATM_NIF_MTU;
|
|
unisig_attr.aal.v.aal5.backward_max_SDU_size = ATM_NIF_MTU;
|
|
unisig_attr.aal.v.aal5.SSCS_type = T_ATM_SSCS_SSCOP_REL;
|
|
|
|
unisig_attr.called.tag = T_ATM_PRESENT;
|
|
unisig_attr.called.addr.address_format = T_ATM_PVC_ADDR;
|
|
unisig_attr.called.addr.address_length = sizeof(Atm_addr_pvc);
|
|
pvcp = (Atm_addr_pvc *)unisig_attr.called.addr.address;
|
|
ATM_PVC_SET_VPI(pvcp, UNISIG_SIG_VPI);
|
|
ATM_PVC_SET_VCI(pvcp, UNISIG_SIG_VCI);
|
|
unisig_attr.called.subaddr.address_format = T_ATM_ABSENT;
|
|
unisig_attr.called.subaddr.address_length = 0;
|
|
|
|
unisig_attr.traffic.v.forward.PCR_all_traffic =
|
|
usp->us_pif->pif_pcr;
|
|
unisig_attr.traffic.v.backward.PCR_all_traffic =
|
|
usp->us_pif->pif_pcr;
|
|
|
|
/*
|
|
* Create UNISIG signalling channel
|
|
*/
|
|
err = atm_cm_connect(&unisig_endpt, usp, &unisig_attr,
|
|
&usp->us_conn);
|
|
if (err) {
|
|
return(err);
|
|
}
|
|
|
|
/*
|
|
* Establish the SSCF session
|
|
*/
|
|
err = atm_cm_saal_ctl(SSCF_UNI_ESTABLISH_REQ,
|
|
usp->us_conn,
|
|
(void *)0);
|
|
if (err)
|
|
panic("unisig_sigmgr_act13: SSCF_UNI_ESTABLISH_REQ");
|
|
|
|
/*
|
|
* Set the new state
|
|
*/
|
|
usp->us_state = UNISIG_INIT;
|
|
|
|
return(0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Signalling manager state machine action 14
|
|
*
|
|
* Process a detach event
|
|
*
|
|
* Arguments:
|
|
* usp pointer to the UNISIG protocol control block
|
|
* m buffer pointer (may be NULL)
|
|
*
|
|
* Returns:
|
|
* 0 success
|
|
* errno error encountered
|
|
*
|
|
*/
|
|
static int
|
|
unisig_sigmgr_act14(usp, m)
|
|
struct unisig *usp;
|
|
KBuffer *m;
|
|
{
|
|
int err;
|
|
struct unisig_vccb *sig_vccb, *uvp, *vnext;
|
|
struct atm_pif *pip;
|
|
struct t_atm_cause cause;
|
|
|
|
/*
|
|
* Locate the signalling channel's VCCB
|
|
*/
|
|
sig_vccb = (struct unisig_vccb *)0;
|
|
if (usp->us_conn && usp->us_conn->co_connvc)
|
|
sig_vccb = (struct unisig_vccb *)
|
|
usp->us_conn->co_connvc->cvc_vcc;
|
|
|
|
/*
|
|
* Terminate all of our VCCs
|
|
*/
|
|
for (uvp = Q_HEAD(usp->us_vccq, struct unisig_vccb);
|
|
uvp; uvp = vnext) {
|
|
vnext = Q_NEXT(uvp, struct unisig_vccb, uv_sigelem);
|
|
|
|
/*
|
|
* Don't close the signalling VCC yet
|
|
*/
|
|
if (uvp == sig_vccb)
|
|
continue;
|
|
|
|
/*
|
|
* Close VCC and notify owner
|
|
*/
|
|
err = unisig_clear_vcc(usp, uvp,
|
|
T_ATM_CAUSE_NORMAL_CALL_CLEARING);
|
|
}
|
|
|
|
/*
|
|
* Close the signalling channel
|
|
*/
|
|
if (usp->us_conn) {
|
|
cause.coding_standard = T_ATM_ITU_CODING;
|
|
cause.coding_standard = T_ATM_LOC_USER;
|
|
cause.coding_standard = T_ATM_CAUSE_UNSPECIFIED_NORMAL;
|
|
err = atm_cm_release(usp->us_conn, &cause);
|
|
if (err)
|
|
panic("unisig_sigmgr_act14: close failed\n");
|
|
}
|
|
|
|
/*
|
|
* Get rid of protocol instance if there are no VCCs queued
|
|
*/
|
|
pip = usp->us_pif;
|
|
if (Q_HEAD(usp->us_vccq, struct vccb) == NULL &&
|
|
pip->pif_sigmgr) {
|
|
struct sigmgr *smp = pip->pif_sigmgr;
|
|
int s = splimp();
|
|
|
|
pip->pif_sigmgr = NULL;
|
|
pip->pif_siginst = NULL;
|
|
(void) splx(s);
|
|
|
|
UNLINK((struct siginst *)usp, struct siginst,
|
|
smp->sm_prinst, si_next);
|
|
KM_FREE(usp, sizeof(struct unisig), M_DEVBUF);
|
|
} else {
|
|
/*
|
|
* Otherwise, set new signalling manager state and
|
|
* wait for protocol instance to be freed during
|
|
* unisig_free processing for the last queued VCC
|
|
*/
|
|
usp->us_state = UNISIG_DETACH;
|
|
}
|
|
|
|
return (0);
|
|
}
|