sys/net/i4b/layer3/i4b_l3fsm.c

   1 /*
   2  * Copyright (c) 1997, 2000 Hellmuth Michaelis. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  23  * SUCH DAMAGE.
  24  *
  25  *---------------------------------------------------------------------------
  26  *
  27  *      i4b_l3fsm.c - layer 3 FSM
  28  *      -------------------------
  29  *
  30  *      $Id: i4b_l3fsm.c,v 1.22 2000/08/24 11:48:58 hm Exp $
  31  *
  32  * $FreeBSD: src/sys/i4b/layer3/i4b_l3fsm.c,v 1.6.2.1 2001/08/10 14:08:42 obrien Exp $
  33  * $DragonFly: src/sys/net/i4b/layer3/i4b_l3fsm.c,v 1.7 2006/01/14 11:05:18 swildner Exp $
  34  *
  35  *      last edit-date: [Thu Oct 12 17:58:35 2000]
  36  *
  37  *---------------------------------------------------------------------------*/
  38
  39 #include "use_i4bq931.h"
  40 #if NI4BQ931 > 0
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/mbuf.h>
  45 #include <sys/thread2.h>
  46
  47 #include <net/i4b/include/machine/i4b_debug.h>
  48 #include <net/i4b/include/machine/i4b_ioctl.h>
  49 #include <net/i4b/include/machine/i4b_cause.h>
  50
  51 #include "../include/i4b_l2l3.h"
  52 #include "../include/i4b_l3l4.h"
  53 #include "../include/i4b_global.h"
  54
  55 #include "i4b_l3.h"
  56 #include "i4b_l3fsm.h"
  57
  58 #include "../layer4/i4b_l4.h"
  59
  60
  61 static void F_00A(call_desc_t *cd), F_00H(call_desc_t *cd), F_00I(call_desc_t *cd);
  62 static void F_00J(call_desc_t *cd);
  63
  64 static void F_01B(call_desc_t *cd), F_01K(call_desc_t *cd), F_01L(call_desc_t *cd);
  65 static void F_01M(call_desc_t *cd), F_01N(call_desc_t *cd), F_01U(call_desc_t *cd);
  66 static void F_01O(call_desc_t *cd);
  67
  68 static void F_03C(call_desc_t *cd), F_03N(call_desc_t *cd), F_03O(call_desc_t *cd);
  69 static void F_03P(call_desc_t *cd), F_03Y(call_desc_t *cd);
  70
  71 static void F_04O(call_desc_t *cd);
  72
  73 static void F_06D(call_desc_t *cd), F_06E(call_desc_t *cd), F_06F(call_desc_t *cd);
  74 static void F_06G(call_desc_t *cd), F_06J(call_desc_t *cd), F_06Q(call_desc_t *cd);
  75
  76 static void F_07E(call_desc_t *cd), F_07F(call_desc_t *cd), F_07G(call_desc_t *cd);
  77
  78 static void F_08R(call_desc_t *cd), F_08Z(call_desc_t *cd);
  79
  80 static void F_09D(call_desc_t *cd), F_09E(call_desc_t *cd), F_09F(call_desc_t *cd);
  81 static void F_09G(call_desc_t *cd);
  82
  83 static void F_11J(call_desc_t *cd), F_11Q(call_desc_t *cd), F_11V(call_desc_t *cd);
  84
  85 static void F_12C(call_desc_t *cd), F_12J(call_desc_t *cd);
  86
  87 static void F_19I(call_desc_t *cd), F_19J(call_desc_t *cd), F_19K(call_desc_t *cd);
  88 static void F_19W(call_desc_t *cd);
  89
  90 static void F_NCNA(call_desc_t *cd), F_STENQ(call_desc_t *cd), F_STAT(call_desc_t *cd);
  91 static void F_INFO(call_desc_t *cd), F_RELCP(call_desc_t *cd), F_REL(call_desc_t *cd);
  92 static void F_DISC(call_desc_t *cd), F_DCRQ(call_desc_t *cd), F_UEM(call_desc_t *cd);
  93 static void F_SIGN(call_desc_t *cd), F_DLEI(call_desc_t *cd), F_ILL(call_desc_t *cd);
  94 static void F_309TO(call_desc_t *cd), F_DECF(call_desc_t *cd), F_FCTY(call_desc_t *cd);
  95 static void F_DECF1(call_desc_t *cd), F_DECF2(call_desc_t *cd), F_DECF3(call_desc_t *cd);
  96 static void F_DLRI(call_desc_t *cd), F_DLRIA(call_desc_t *cd), F_DECF4(call_desc_t *cd);
  97
  98 static void F_308TO(call_desc_t *cd);
  99
 100 #if DO_I4B_DEBUG
 101 static char *l3state_text[N_STATES] = {
 102          "ST_U0 - Null",
 103          "ST_U1 - Out Init",
 104          "ST_U3 - Out Proc",
 105          "ST_U4 - Out Delv",
 106          "ST_U6 - In Pres",
 107          "ST_U7 - In Rxd",
 108          "ST_U8 - In ConReq",
 109          "ST_U9 - In Proc",
 110         "ST_U10 - Active",
 111         "ST_U11 - Disc Req",
 112         "ST_U12 - Disc Ind",
 113         "ST_U19 - Rel Req",
 114
 115         "ST_IWA - In Wait EST-Accept",
 116         "ST_IWR - In Wait EST-Reject",
 117         "ST_OW - Out Wait EST",
 118         "ST_IWL - In Wait EST-Alert",
 119
 120         "ST_SUSE - Subroutine sets state",
 121
 122         "Illegal State"
 123 };
 124
 125 static char *l3event_text[N_EVENTS] = {
 126         "EV_SETUPRQ - L4 SETUP REQ",    /* setup request from L4                */
 127         "EV_DISCRQ - L4 DISC REQ",      /* disconnect request from L4           */
 128         "EV_RELRQ - L4 REL REQ",        /* release request from L4              */
 129         "EV_ALERTRQ - L4 ALERT REQ",    /* alerting request from L4             */
 130         "EV_SETACRS - L4 accept RSP",   /* setup response accept from l4        */
 131         "EV_SETRJRS - L4 reject RSP",   /* setup response reject from l4        */
 132         "EV_SETDCRS - L4 ignore RSP",   /* setup response dontcare from l4      */
 133
 134         "EV_SETUP - rxd SETUP",         /* incoming SETUP message from L2       */
 135         "EV_STATUS - rxd STATUS",       /* incoming STATUS message from L2      */
 136         "EV_RELEASE - rxd REL",         /* incoming RELEASE message from L2     */
 137         "EV_RELCOMP - rxd REL COMPL",   /* incoming RELEASE COMPLETE from L2    */
 138         "EV_SETUPAK - rxd SETUP ACK",   /* incoming SETUP ACK message from L2   */
 139         "EV_CALLPRC - rxd CALL PROC",   /* incoming CALL PROCEEDING from L2     */
 140         "EV_ALERT - rxd ALERT",         /* incoming ALERT message from L2       */
 141         "EV_CONNECT - rxd CONNECT",     /* incoming CONNECT message from L2     */
 142         "EV_PROGIND - rxd PROG IND",    /* incoming Progress IND from L2        */
 143         "EV_DISCONN - rxd DISC",        /* incoming DISCONNECT message from L2  */
 144         "EV_CONACK - rxd CONN ACK",     /* incoming CONNECT ACK message from L2 */
 145         "EV_STATENQ - rxd STAT ENQ",    /* incoming STATUS ENQ message from L2  */
 146         "EV_INFO - rxd INFO",           /* incoming INFO message from L2        */
 147         "EV_FACILITY - rxd FACILITY",   /* incoming FACILITY message            */
 148
 149         "EV_T303EXP - T303 timeout",    /* Timer T303 expired                   */
 150         "EV_T305EXP - T305 timeout",    /* Timer T305 expired                   */
 151         "EV_T308EXP - T308 timeout",    /* Timer T308 expired                   */
 152         "EV_T309EXP - T309 timeout",    /* Timer T309 expired                   */
 153         "EV_T310EXP - T310 timeout",    /* Timer T310 expired                   */
 154         "EV_T313EXP - T313 timeout",    /* Timer T313 expired                   */
 155
 156         "EV_DLESTIN - L2 DL_Est_Ind",   /* dl establish indication from l2      */
 157         "EV_DLRELIN - L2 DL_Rel_Ind",   /* dl release indication from l2        */
 158         "EV_DLESTCF - L2 DL_Est_Cnf",   /* dl establish confirm from l2         */
 159         "EV_DLRELCF - L2 DL_Rel_Cnf",   /* dl release confirm from l2           */
 160
 161         "EV_ILL - Illegal event!!"      /* Illegal */
 162 };
 163 #endif
 164
 165 /*---------------------------------------------------------------------------*
 166  *      layer 3 state transition table
 167  *---------------------------------------------------------------------------*/
 168 struct l3state_tab {
 169         void (*func) (call_desc_t *);   /* function to execute */
 170         int newstate;                           /* next state */
 171 } l3state_tab[N_EVENTS][N_STATES] = {
 172
 173 /* STATE:       ST_U0                   ST_U1                   ST_U3                   ST_U4                   ST_U6                   ST_U7                   ST_U8                   ST_U9                   ST_U10                  ST_U11                  ST_U12                  ST_U19                  ST_IWA                  ST_IWR                  ST_OW                   ST_IWL                  ST_SUBSET               ST_ILL        */
 174 /* ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
 175 /*EV_SETUPRQ*/  {{F_00A,  ST_SUSE},     {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 176 /*EV_DISCRQ */  {{F_ILL,  ST_ILL},      {F_01B,  ST_U11},       {F_DCRQ, ST_U11},       {F_DCRQ, ST_U11},       {F_ILL,  ST_ILL},       {F_DCRQ, ST_U11},       {F_DCRQ, ST_U11},       {F_DCRQ, ST_U11},       {F_DCRQ, ST_U11},       {F_ILL,  ST_ILL},       {F_NCNA, ST_U12},       {F_ILL,  ST_ILL},       {F_DCRQ, ST_U11},       {F_DCRQ, ST_U11},       {F_DCRQ, ST_U11},       {F_DCRQ, ST_U11},       {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 177 /*EV_RELRQ  */  {{F_ILL,  ST_ILL},      {F_ILL,  ST_ILL},       {F_03C,  ST_U19},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_12C,  ST_U19},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 178 /*EV_ALERTRQ*/  {{F_ILL,  ST_ILL},      {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_06D,  ST_SUSE},      {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_09D,  ST_U7},        {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 179 /*EV_SETACRS*/  {{F_ILL,  ST_ILL},      {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_06E,  ST_SUSE},      {F_07E,  ST_U8},        {F_ILL,  ST_ILL},       {F_09E,  ST_U8},        {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 180 /*EV_SETRJRS*/  {{F_ILL,  ST_ILL},      {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_06F,  ST_SUSE},      {F_07F,  ST_U0},        {F_ILL,  ST_ILL},       {F_09F,  ST_U0},        {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 181 /*EV_SETDCRS*/  {{F_ILL,  ST_ILL},      {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_06G,  ST_U0},        {F_07G,  ST_U0},        {F_ILL,  ST_ILL},       {F_09G,  ST_U0},        {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 182 /* STATE:       ST_U0                   ST_U1                   ST_U3                   ST_U4                   ST_U6                   ST_U7                   ST_U8                   ST_U9                   ST_U10                  ST_U11                  ST_U12                  ST_U19                  ST_IWA                  ST_IWR                  ST_OW                   ST_IWL                  ST_SUBSET               ST_ILL        */
 183 /* ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
 184 /*EV_SETUP  */  {{F_00H,  ST_U6},       {F_SIGN, ST_U1},        {F_SIGN, ST_U3},        {F_SIGN, ST_U4},        {F_SIGN, ST_U6},        {F_SIGN, ST_U7},        {F_SIGN, ST_U8},        {F_SIGN, ST_U9},        {F_SIGN, ST_U10},       {F_SIGN, ST_U11},       {F_SIGN, ST_U12},       {F_SIGN, ST_U19},       {F_SIGN, ST_IWA},       {F_SIGN, ST_IWR},       {F_SIGN, ST_OW},        {F_SIGN, ST_IWL},       {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 185 /*EV_STATUS */  {{F_00I,  ST_SUSE},     {F_STAT, ST_SUSE},      {F_STAT, ST_SUSE},      {F_STAT, ST_SUSE},      {F_STAT, ST_SUSE},      {F_STAT, ST_SUSE},      {F_STAT, ST_SUSE},      {F_STAT, ST_SUSE},      {F_STAT, ST_SUSE},      {F_STAT, ST_SUSE},      {F_STAT, ST_SUSE},      {F_19I,  ST_SUSE},      {F_STAT, ST_SUSE},      {F_STAT, ST_SUSE},      {F_STAT, ST_SUSE},      {F_STAT, ST_SUSE},      {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 186 /*EV_RELEASE*/  {{F_00J,  ST_U0},       {F_UEM,  ST_SUSE},      {F_REL,  ST_U0},        {F_REL,  ST_U0},        {F_06J,  ST_U0},        {F_REL,  ST_U0},        {F_REL,  ST_U0},        {F_REL,  ST_U0},        {F_REL,  ST_U0},        {F_11J,  ST_U0},        {F_12J,  ST_U0},        {F_19J,  ST_U0},        {F_REL,  ST_U0},        {F_REL,  ST_U0},        {F_REL,  ST_U0},        {F_REL,  ST_U0},        {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 187 /*EV_RELCOMP*/  {{F_NCNA, ST_U0},       {F_01K,  ST_U0},        {F_RELCP,ST_U0},        {F_RELCP,ST_U0},        {F_RELCP,ST_U0},        {F_RELCP,ST_U0},        {F_RELCP,ST_U0},        {F_RELCP,ST_U0},        {F_RELCP,ST_U0},        {F_RELCP,ST_U0},        {F_RELCP,ST_U0},        {F_19K,  ST_U0},        {F_RELCP,ST_U0},        {F_RELCP,ST_U0},        {F_RELCP,ST_U0},        {F_RELCP,ST_U0},        {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 188 /*EV_SETUPAK*/  {{F_UEM,  ST_SUSE},     {F_01L,  ST_U3},        {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 189 /*EV_CALLPRC*/  {{F_UEM,  ST_SUSE},     {F_01M,  ST_U3},        {F_NCNA, ST_U3},        {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 190 /*EV_ALERT  */  {{F_UEM,  ST_SUSE},     {F_01N,  ST_U4},        {F_03N,  ST_U4},        {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 191 /*EV_CONNECT*/  {{F_UEM,  ST_SUSE},     {F_01O,  ST_U10},       {F_03O,  ST_U10},       {F_04O,  ST_U10},       {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 192 /*EV_PROGIND*/  {{F_UEM,  ST_SUSE},     {F_UEM,  ST_SUSE},      {F_03P,  ST_U3},        {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 193 /*EV_DISCONN*/  {{F_UEM,  ST_SUSE},     {F_UEM,  ST_SUSE},      {F_DISC, ST_U12},       {F_DISC, ST_U12},       {F_06Q,  ST_U12},       {F_DISC, ST_U12},       {F_DISC, ST_U12},       {F_DISC, ST_U12},       {F_DISC, ST_U12},       {F_11Q,  ST_U19},       {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_DISC, ST_U12},       {F_DISC, ST_U12},       {F_DISC, ST_U12},       {F_DISC, ST_U12},       {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 194 /*EV_CONACK */  {{F_UEM,  ST_SUSE},     {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_08R,  ST_U10},       {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_UEM,  ST_SUSE},      {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 195 /*EV_STATENQ*/  {{F_STENQ,ST_U0},       {F_STENQ,ST_U1},        {F_STENQ,ST_U3},        {F_STENQ,ST_U4},        {F_STENQ,ST_U6},        {F_STENQ,ST_U7},        {F_STENQ,ST_U8},        {F_STENQ,ST_U9},        {F_STENQ,ST_U10},       {F_STENQ,ST_U11},       {F_STENQ,ST_U12},       {F_STENQ,ST_U19},       {F_STENQ,ST_IWA},       {F_STENQ,ST_IWR},       {F_STENQ,ST_OW},        {F_STENQ,ST_OW},        {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 196 /*EV_INFO   */  {{F_UEM,  ST_SUSE},     {F_UEM,  ST_SUSE},      {F_INFO, ST_U3},        {F_INFO, ST_U4},        {F_UEM,  ST_SUSE},      {F_INFO, ST_U7},        {F_INFO, ST_U8},        {F_INFO, ST_U9},        {F_INFO, ST_U10},       {F_INFO, ST_U11},       {F_INFO, ST_U12},       {F_UEM,  ST_SUSE},      {F_INFO, ST_IWA},       {F_INFO, ST_IWR},       {F_INFO, ST_OW},        {F_INFO, ST_OW},        {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 197 /*EV_FACILITY*/ {{F_FCTY, ST_SUSE},     {F_FCTY, ST_SUSE},      {F_FCTY, ST_SUSE},      {F_FCTY, ST_SUSE},      {F_FCTY, ST_SUSE},      {F_FCTY, ST_SUSE},      {F_FCTY, ST_SUSE},      {F_FCTY, ST_SUSE},      {F_FCTY, ST_SUSE},      {F_FCTY, ST_SUSE},      {F_FCTY, ST_SUSE},      {F_FCTY, ST_SUSE},      {F_FCTY, ST_SUSE},      {F_FCTY, ST_SUSE},      {F_FCTY, ST_SUSE},      {F_FCTY, ST_SUSE},      {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 198 /* STATE:       ST_U0                   ST_U1                   ST_U3                   ST_U4                   ST_U6                   ST_U7                   ST_U8                   ST_U9                   ST_U10                  ST_U11                  ST_U12                  ST_U19                  ST_IWA                  ST_IWR                  ST_OW                   ST_IWL                  ST_SUBSET               ST_ILL        */
 199 /* ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
 200 /*EV_T303EXP*/  {{F_ILL,  ST_ILL},      {F_01U,  ST_SUSE},      {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 201 /*EV_T305EXP*/  {{F_ILL,  ST_ILL},      {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_11V,  ST_U19},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 202 /*EV_T308EXP*/  {{F_ILL,  ST_ILL},      {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_308TO,ST_ILL},       {F_19W,  ST_SUSE},      {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 203 /*EV_T309EXP*/  {{F_309TO,ST_U0},       {F_309TO,ST_U0},        {F_309TO,ST_U0},        {F_309TO,ST_U0},        {F_309TO,ST_U0},        {F_309TO,ST_U0},        {F_309TO,ST_U0},        {F_309TO,ST_U0},        {F_309TO,ST_U0},        {F_309TO,ST_U0},        {F_309TO,ST_U0},        {F_309TO,ST_U0},        {F_309TO,ST_U0},        {F_309TO,ST_U0},        {F_309TO,ST_U0},        {F_309TO,ST_U0},        {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 204 /*EV_T310EXP*/  {{F_ILL,  ST_ILL},      {F_ILL,  ST_ILL},       {F_03Y,  ST_U11},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 205 /*EV_T313EXP*/  {{F_ILL,  ST_ILL},      {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_08Z,  ST_U11},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 206 /* STATE:       ST_U0                   ST_U1                   ST_U3                   ST_U4                   ST_U6                   ST_U7                   ST_U8                   ST_U9                   ST_U10                  ST_U11                  ST_U12                  ST_U19                  ST_IWA                  ST_IWR                  ST_OW                   ST_IWL                  ST_SUBSET               ST_ILL        */
 207 /* ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
 208 /*EV_DLESTIN*/  {{F_ILL,  ST_ILL},      {F_DLEI, ST_U1},        {F_DLEI, ST_U3},        {F_DLEI, ST_U4},        {F_DLEI, ST_U1},        {F_DLEI, ST_U1},        {F_DLEI, ST_U1},        {F_DLEI, ST_U1},        {F_DLEI, ST_U1},        {F_DLEI, ST_U1},        {F_DLEI, ST_U1},        {F_DLEI, ST_U1},        {F_DLEI, ST_U1},        {F_DLEI, ST_U1},        {F_DLEI, ST_U1},        {F_DLEI, ST_U1},        {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 209 /*EV_DLRELIN*/  {{F_NCNA, ST_U0},       {F_DLRIA, ST_OW},       {F_DLRI, ST_U0},        {F_DLRI, ST_U0},        {F_DLRI, ST_U0},        {F_DLRI, ST_U0},        {F_DLRI, ST_U0},        {F_DLRI, ST_U0},        {F_DLRIA,ST_U10},       {F_DLRI, ST_U0},        {F_DLRI, ST_U0},        {F_DLRI, ST_U0},        {F_DLRI, ST_U0},        {F_DLRI, ST_U0},        {F_DLRI, ST_U0},        {F_DLRI, ST_U0},        {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 210 /*EV_DLESTCF*/  {{F_DECF, ST_SUSE},     {F_DECF, ST_SUSE},      {F_DECF, ST_SUSE},      {F_DECF, ST_SUSE},      {F_DECF, ST_SUSE},      {F_DECF, ST_SUSE},      {F_DECF, ST_SUSE},      {F_DECF, ST_SUSE},      {F_DECF, ST_SUSE},      {F_DECF, ST_SUSE},      {F_DECF, ST_SUSE},      {F_DECF, ST_SUSE},      {F_DECF2,ST_U8},        {F_DECF3,ST_U0},        {F_DECF1,ST_U1},        {F_DECF4,ST_U7},        {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 211 /*EV_DLRELCF*/  {{F_ILL,  ST_ILL},      {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL, ST_ILL},        {F_ILL, ST_ILL}},
 212 /*EV_ILL    */  {{F_ILL,  ST_ILL},      {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL,  ST_ILL},       {F_ILL, ST_ILL},        {F_ILL, ST_ILL}}
 213 };
 214
 215 /*---------------------------------------------------------------------------*
 216  *      event handler
 217  *---------------------------------------------------------------------------*/
 218 void
 219 next_l3state(call_desc_t *cd, int event)
 220 {
 221         int currstate, newstate;
 222
 223         if(event > N_EVENTS)
 224                 panic("i4b_l3fsm.c: event > N_EVENTS\n");
 225
 226         currstate = cd->Q931state;
 227
 228         if(currstate > N_STATES)
 229                 panic("i4b_l3fsm.c: currstate > N_STATES\n");
 230
 231         newstate = l3state_tab[event][currstate].newstate;
 232
 233         if(newstate > N_STATES)
 234                 panic("i4b_l3fsm.c: newstate > N_STATES\n");
 235
 236         NDBGL3(L3_F_MSG, "L3 FSM event [%s]: [%s => %s]",
 237                                 l3event_text[event],
 238                                 l3state_text[currstate],
 239                                 l3state_text[newstate]);
 240
 241         /* execute function */
 242
 243         (*l3state_tab[event][currstate].func)(cd);
 244
 245         if(newstate == ST_ILL)
 246         {
 247                 newstate = currstate;
 248                 NDBGL3(L3_F_ERR, "FSM illegal state, state = %s, event = %s!",
 249                                 l3state_text[newstate],
 250                                 l3event_text[event]);
 251         }
 252
 253         if(newstate != ST_SUSE)
 254                 cd->Q931state = newstate;
 255 }
 256
 257 #if DO_I4B_DEBUG
 258 /*---------------------------------------------------------------------------*
 259  *      return pointer to current state description
 260  *---------------------------------------------------------------------------*/
 261 char *
 262 print_l3state(call_desc_t *cd)
 263 {
 264         return((char *) l3state_text[cd->Q931state]);
 265 }
 266 #endif
 267
 268 /*---------------------------------------------------------------------------*
 269  *      L3 FSM state U0 event L4 setup req
 270  *---------------------------------------------------------------------------*/
 271 static void
 272 F_00A(call_desc_t *cd)
 273 {
 274         NDBGL3(L3_F_MSG, "FSM function F_00A executing");
 275
 276         cd->T303_first_to = 1;
 277         T303_start(cd);
 278
 279         crit_enter();
 280         if(i4b_get_dl_stat(cd) == DL_DOWN)
 281         {
 282                 crit_exit();
 283                 DL_Est_Req(ctrl_desc[cd->controller].unit);
 284                 cd->Q931state = ST_OW;
 285         }
 286         else
 287         {
 288                 cd->Q931state = ST_U1;
 289                 crit_exit();
 290                 i4b_l3_tx_setup(cd);
 291         }
 292 }
 293
 294 /*---------------------------------------------------------------------------*
 295  *      L3 FSM state U0 event SETUP from L2
 296  *---------------------------------------------------------------------------*/
 297 static void
 298 F_00H(call_desc_t *cd)
 299 {
 300         NDBGL3(L3_F_MSG, "FSM function F_00H executing");
 301         i4b_l4_connect_ind(cd); /* tell l4 we have an incoming setup */
 302 }
 303
 304 /*---------------------------------------------------------------------------*
 305  *      L3 FSM state U0 event STATUS from L2
 306  *---------------------------------------------------------------------------*/
 307 static void
 308 F_00I(call_desc_t *cd)
 309 {
 310         NDBGL3(L3_F_MSG, "FSM function F_00I executing");
 311
 312         if(cd->call_state != 0)
 313         {
 314                 cd->cause_out = 101;
 315                 i4b_l3_tx_release_complete(cd, 1);      /* 1 = send cause */
 316         }
 317         cd->Q931state = ST_U0;
 318 }
 319
 320 /*---------------------------------------------------------------------------*
 321  *      L3 FSM state U0 event RELEASE from L2
 322  *---------------------------------------------------------------------------*/
 323 static void
 324 F_00J(call_desc_t *cd)
 325 {
 326         NDBGL3(L3_F_MSG, "FSM function F_00J executing");
 327         i4b_l3_tx_release_complete(cd, 0);      /* 0 = don't send cause */
 328 }
 329
 330 /*---------------------------------------------------------------------------*
 331  *      L3 FSM state U1 event disconnect req from L4
 332  *---------------------------------------------------------------------------*/
 333 static void
 334 F_01B(call_desc_t *cd)
 335 {
 336         NDBGL3(L3_F_MSG, "FSM function F_01B executing");
 337         /* cause from L4 */
 338         i4b_l3_tx_disconnect(cd);
 339         T303_stop(cd);
 340         T305_start(cd);
 341 }
 342
 343 /*---------------------------------------------------------------------------*
 344  *      L3 FSM state U1 event RELEASE COMPLETE from L2
 345  *---------------------------------------------------------------------------*/
 346 static void
 347 F_01K(call_desc_t *cd)
 348 {
 349         NDBGL3(L3_F_MSG, "FSM function F_01K executing");
 350         T303_stop(cd);
 351         i4b_l4_disconnect_ind(cd);      /* tell l4 we were rejected */
 352         freecd_by_cd(cd);
 353 }
 354
 355 /*---------------------------------------------------------------------------*
 356  *      L3 FSM state U1 event SETUP ACK from L2
 357  *---------------------------------------------------------------------------*/
 358 static void
 359 F_01L(call_desc_t *cd)
 360 {
 361         NDBGL3(L3_F_MSG, "FSM function F_01L executing");
 362         T303_stop(cd);
 363
 364         /*
 365          * since this implementation does NOT support overlap sending,
 366          * we react here as if we received a CALL PROCEEDING because
 367          * several PBX's react with a SETUP ACK even if the called
 368          * number is complete AND we sent a SENDING COMPLETE in the
 369          * preceding SETUP message. (-hm)
 370          */
 371
 372         T310_start(cd);
 373         i4b_l4_proceeding_ind(cd);
 374 }
 375
 376 /*---------------------------------------------------------------------------*
 377  *      L3 FSM state U1 event CALL PROCEEDING from L2
 378  *---------------------------------------------------------------------------*/
 379 static void
 380 F_01M(call_desc_t *cd)
 381 {
 382         NDBGL3(L3_F_MSG, "FSM function F_01M executing");
 383         T303_stop(cd);
 384         T310_start(cd);
 385         i4b_l4_proceeding_ind(cd);
 386 }
 387
 388 /*---------------------------------------------------------------------------*
 389  *      L3 FSM state U1 event ALERT from L2  (XXX !)
 390  *---------------------------------------------------------------------------*/
 391 static void
 392 F_01N(call_desc_t *cd)
 393 {
 394         NDBGL3(L3_F_MSG, "FSM function F_01N executing");
 395         T303_stop(cd);
 396         i4b_l4_alert_ind(cd);
 397 }
 398
 399 /*---------------------------------------------------------------------------*
 400  *      L3 FSM state U1 event CONNECT from L2 (XXX !)
 401  *---------------------------------------------------------------------------*/
 402 static void
 403 F_01O(call_desc_t *cd)
 404 {
 405         NDBGL3(L3_F_MSG, "FSM function F_01O executing");
 406         T303_stop(cd);
 407         i4b_l3_tx_connect_ack(cd);
 408         i4b_l4_connect_active_ind(cd);
 409 }
 410
 411 /*---------------------------------------------------------------------------*
 412  *      L3 FSM state U1 event T303 timeout
 413  *---------------------------------------------------------------------------*/
 414 static void
 415 F_01U(call_desc_t *cd)
 416 {
 417         NDBGL3(L3_F_MSG, "FSM function F_01U executing");
 418         if(cd->T303_first_to == 1)
 419         {
 420                 cd->T303_first_to = 0;
 421                 i4b_l3_tx_setup(cd);
 422                 T303_start(cd);
 423                 cd->Q931state = ST_U1;
 424         }
 425         else
 426         {
 427                 i4b_l4_disconnect_ind(cd);
 428                 freecd_by_cd(cd);
 429                 cd->Q931state = ST_U0;
 430         }
 431 }
 432
 433 /*---------------------------------------------------------------------------*
 434  *      L3 FSM state U3 event release req from L4
 435  *---------------------------------------------------------------------------*/
 436 static void
 437 F_03C(call_desc_t *cd)
 438 {
 439         NDBGL3(L3_F_MSG, "FSM function F_03C executing");
 440         T310_stop(cd);
 441         cd->cause_out = 6;
 442         i4b_l3_tx_release(cd, 1);       /* 0 = don't send cause */
 443         cd->T308_first_to = 1;
 444         T308_start(cd);
 445 }
 446
 447 /*---------------------------------------------------------------------------*
 448  *      L3 FSM state U3 event ALERT from L2
 449  *---------------------------------------------------------------------------*/
 450 static void
 451 F_03N(call_desc_t *cd)
 452 {
 453         NDBGL3(L3_F_MSG, "FSM function F_03N executing");
 454         T310_stop(cd);
 455         i4b_l4_alert_ind(cd);
 456 }
 457
 458 /*---------------------------------------------------------------------------*
 459  *      L3 FSM state U3 event CONNECT from L2
 460  *---------------------------------------------------------------------------*/
 461 static void
 462 F_03O(call_desc_t *cd)
 463 {
 464         NDBGL3(L3_F_MSG, "FSM function F_03O executing");
 465         T310_stop(cd);
 466         i4b_l3_tx_connect_ack(cd);      /* CONNECT ACK to network */
 467         i4b_l4_connect_active_ind(cd);
 468 }
 469
 470 /*---------------------------------------------------------------------------*
 471  *      L3 FSM state U3 event PROGESS IND from L2
 472  *---------------------------------------------------------------------------*/
 473 static void
 474 F_03P(call_desc_t *cd)
 475 {
 476         NDBGL3(L3_F_MSG, "FSM function F_03P executing");
 477         T310_stop(cd);
 478 #ifdef NOTDEF
 479         i4b_l4_progress_ind(cd);
 480 #endif
 481 }
 482
 483 /*---------------------------------------------------------------------------*
 484  *      L3 FSM state U3 event T310 timeout
 485  *---------------------------------------------------------------------------*/
 486 static void
 487 F_03Y(call_desc_t *cd)
 488 {
 489         NDBGL3(L3_F_MSG, "FSM function F_03Y executing");
 490         cd->cause_out = 102;    /* recovery on timer expiry */
 491         i4b_l3_tx_disconnect(cd);
 492         T305_start(cd);
 493         i4b_l4_disconnect_ind(cd);
 494 }
 495
 496 /*---------------------------------------------------------------------------*
 497  *      L3 FSM state U4 event CONNECT from L2
 498  *---------------------------------------------------------------------------*/
 499 static void
 500 F_04O(call_desc_t *cd)
 501 {
 502         NDBGL3(L3_F_MSG, "FSM function F_04O executing");
 503         i4b_l3_tx_connect_ack(cd);      /* CONNECT ACK to network */
 504         i4b_l4_connect_active_ind(cd);
 505 }
 506
 507 /*---------------------------------------------------------------------------*
 508  *      L3 FSM state U6 event alert req from L4
 509  *---------------------------------------------------------------------------*/
 510 static void
 511 F_06D(call_desc_t *cd)
 512 {
 513         NDBGL3(L3_F_MSG, "FSM function F_06D executing");
 514
 515         if(i4b_get_dl_stat(cd) == DL_DOWN)
 516         {
 517                 DL_Est_Req(ctrl_desc[cd->controller].unit);
 518                 cd->Q931state = ST_IWL;
 519         }
 520         else
 521         {
 522                 i4b_l3_tx_alert(cd);
 523                 cd->Q931state = ST_U7;
 524         }
 525 }
 526
 527 /*---------------------------------------------------------------------------*
 528  *      L3 FSM state U6 event incoming setup accept from L4
 529  *---------------------------------------------------------------------------*/
 530 static void
 531 F_06E(call_desc_t *cd)
 532 {
 533         NDBGL3(L3_F_MSG, "FSM function F_06E executing");
 534
 535         if(i4b_get_dl_stat(cd) == DL_DOWN)
 536         {
 537                 DL_Est_Req(ctrl_desc[cd->controller].unit);
 538                 cd->Q931state = ST_IWA;
 539         }
 540         else
 541         {
 542                 i4b_l3_tx_connect(cd);
 543                 cd->Q931state = ST_U8;
 544         }
 545         T313_start(cd);
 546 }
 547
 548 /*---------------------------------------------------------------------------*
 549  *      L3 FSM state U6 event incoming setup reject from L4
 550  *---------------------------------------------------------------------------*/
 551 static void
 552 F_06F(call_desc_t *cd)
 553 {
 554         NDBGL3(L3_F_MSG, "FSM function F_06F executing");
 555
 556         if(i4b_get_dl_stat(cd) == DL_DOWN)
 557         {
 558                 DL_Est_Req(ctrl_desc[cd->controller].unit);
 559                 cd->Q931state = ST_IWR;
 560         }
 561         else
 562         {
 563                 crit_enter();
 564                 i4b_l3_tx_release_complete(cd, 1);
 565                 cd->Q931state = ST_U0;
 566                 freecd_by_cd(cd);
 567                 crit_exit();
 568         }
 569 }
 570
 571 /*---------------------------------------------------------------------------*
 572  *      L3 FSM state U6 event incoming setup ignore from L4
 573  *---------------------------------------------------------------------------*/
 574 static void
 575 F_06G(call_desc_t *cd)
 576 {
 577         NDBGL3(L3_F_MSG, "FSM function F_06G executing");
 578         freecd_by_cd(cd);
 579 }
 580
 581 /*---------------------------------------------------------------------------*
 582  *      L3 FSM state U6 event RELEASE from L2
 583  *---------------------------------------------------------------------------*/
 584 static void
 585 F_06J(call_desc_t *cd)
 586 {
 587         NDBGL3(L3_F_MSG, "FSM function F_06J executing");
 588         i4b_l3_tx_release_complete(cd, 0);
 589         i4b_l4_disconnect_ind(cd);
 590         freecd_by_cd(cd);
 591 }
 592
 593 /*---------------------------------------------------------------------------*
 594  *      L3 FSM state U6 event DISCONNECT from L2
 595  *---------------------------------------------------------------------------*/
 596 static void
 597 F_06Q(call_desc_t *cd)
 598 {
 599         NDBGL3(L3_F_MSG, "FSM function F_06Q executing");
 600         i4b_l4_disconnect_ind(cd);
 601 }
 602
 603 /*---------------------------------------------------------------------------*
 604  *      L3 FSM state U7 event setup response accept from L4
 605  *---------------------------------------------------------------------------*/
 606 static void
 607 F_07E(call_desc_t *cd)
 608 {
 609         NDBGL3(L3_F_MSG, "FSM function F_07E executing");
 610         i4b_l3_tx_connect(cd);
 611         T313_start(cd);
 612 }
 613
 614 /*---------------------------------------------------------------------------*
 615  *      L3 FSM state U7 event setup response reject from L4
 616  *---------------------------------------------------------------------------*/
 617 static void
 618 F_07F(call_desc_t *cd)
 619 {
 620         NDBGL3(L3_F_MSG, "FSM function F_07F executing");
 621         i4b_l3_tx_release_complete(cd, 1);
 622         freecd_by_cd(cd);
 623 }
 624
 625 /*---------------------------------------------------------------------------*
 626  *      L3 FSM state U7 event setup response ignore from L4
 627  *---------------------------------------------------------------------------*/
 628 static void
 629 F_07G(call_desc_t *cd)
 630 {
 631         NDBGL3(L3_F_MSG, "FSM function F_07G executing");
 632         freecd_by_cd(cd);
 633 }
 634
 635 /*---------------------------------------------------------------------------*
 636  *      L3 FSM state U8 event CONNECT ACK from L2
 637  *---------------------------------------------------------------------------*/
 638 static void
 639 F_08R(call_desc_t *cd)
 640 {
 641         NDBGL3(L3_F_MSG, "FSM function F_08R executing");
 642         T313_stop(cd);
 643         i4b_l4_connect_active_ind(cd);
 644 }
 645
 646 /*---------------------------------------------------------------------------*
 647  *      L3 FSM state U8 event T313 timeout
 648  *---------------------------------------------------------------------------*/
 649 static void
 650 F_08Z(call_desc_t *cd)
 651 {
 652         NDBGL3(L3_F_MSG, "FSM function F_08Z executing");
 653         cd->cause_out = 102;    /* recovery on timer expiry */
 654         i4b_l3_tx_disconnect(cd);
 655         T305_start(cd);
 656         i4b_l4_disconnect_ind(cd);
 657 }
 658
 659 /*---------------------------------------------------------------------------*
 660  *      L3 FSM state U9 event alert req from L4
 661  *---------------------------------------------------------------------------*/
 662 static void
 663 F_09D(call_desc_t *cd)
 664 {
 665         NDBGL3(L3_F_MSG, "FSM function F_09D executing");
 666         i4b_l3_tx_alert(cd);
 667 }
 668
 669 /*---------------------------------------------------------------------------*
 670  *      L3 FSM state U9 event setup response accept from L4
 671  *---------------------------------------------------------------------------*/
 672 static void
 673 F_09E(call_desc_t *cd)
 674 {
 675         NDBGL3(L3_F_MSG, "FSM function F_09E executing");
 676         i4b_l3_tx_connect(cd);
 677         T313_start(cd);
 678 }
 679
 680 /*---------------------------------------------------------------------------*
 681  *      L3 FSM state U9 event setup response reject from L4
 682  *---------------------------------------------------------------------------*/
 683 static void
 684 F_09F(call_desc_t *cd)
 685 {
 686         NDBGL3(L3_F_MSG, "FSM function F_09F executing");
 687         i4b_l3_tx_release_complete(cd, 1);
 688         freecd_by_cd(cd);
 689 }
 690 /*---------------------------------------------------------------------------*
 691  *      L3 FSM state U9 event setup response ignore from L4
 692  *---------------------------------------------------------------------------*/
 693 static void
 694 F_09G(call_desc_t *cd)
 695 {
 696         NDBGL3(L3_F_MSG, "FSM function F_09G executing");
 697         freecd_by_cd(cd);
 698 }
 699
 700 /*---------------------------------------------------------------------------*
 701  *      L3 FSM state U11 event RELEASE from L2
 702  *---------------------------------------------------------------------------*/
 703 static void
 704 F_11J(call_desc_t *cd)
 705 {
 706         NDBGL3(L3_F_MSG, "FSM function F_11J executing");
 707         T305_stop(cd);
 708         i4b_l3_tx_release_complete(cd, 0);
 709         i4b_l4_disconnect_ind(cd);
 710         freecd_by_cd(cd);
 711 }
 712
 713 /*---------------------------------------------------------------------------*
 714  *      L3 FSM state U11 event DISCONNECT from L2
 715  *---------------------------------------------------------------------------*/
 716 static void
 717 F_11Q(call_desc_t *cd)
 718 {
 719         NDBGL3(L3_F_MSG, "FSM function F_11Q executing");
 720         T305_stop(cd);
 721         i4b_l3_tx_release(cd, 0);
 722         cd->T308_first_to = 1;
 723         T308_start(cd);
 724 }
 725
 726 /*---------------------------------------------------------------------------*
 727  *      L3 FSM state U11 event T305 timeout
 728  *---------------------------------------------------------------------------*/
 729 static void
 730 F_11V(call_desc_t *cd)
 731 {
 732         NDBGL3(L3_F_MSG, "FSM function F_11V executing");
 733         cd->cause_out = 102;
 734         i4b_l3_tx_release(cd, 1);
 735         cd->T308_first_to = 1;
 736         T308_start(cd);
 737 }
 738
 739 /*---------------------------------------------------------------------------*
 740  *      L3 FSM state U12 event release req from L4
 741  *---------------------------------------------------------------------------*/
 742 static void
 743 F_12C(call_desc_t *cd)
 744 {
 745         NDBGL3(L3_F_MSG, "FSM function F_12C executing");
 746         i4b_l3_tx_release(cd, 1);
 747         cd->T308_first_to = 1;
 748         T308_start(cd);
 749 }
 750
 751 /*---------------------------------------------------------------------------*
 752  *      L3 FSM state U12 event RELEASE from L2
 753  *---------------------------------------------------------------------------*/
 754 static void
 755 F_12J(call_desc_t *cd)
 756 {
 757         NDBGL3(L3_F_MSG, "FSM function F_12J executing");
 758         i4b_l3_tx_release_complete(cd, 0);
 759         i4b_l4_disconnect_ind(cd);
 760         freecd_by_cd(cd);
 761 }
 762
 763 /*---------------------------------------------------------------------------*
 764  *      L3 FSM state U19 event STATUS from L2
 765  *---------------------------------------------------------------------------*/
 766 static void
 767 F_19I(call_desc_t *cd)
 768 {
 769         NDBGL3(L3_F_MSG, "FSM function F_19I executing");
 770
 771         if(cd->call_state == 0)
 772         {
 773                 i4b_l4_status_ind(cd);
 774                 freecd_by_cd(cd);
 775                 cd->Q931state = ST_U0;
 776         }
 777         else
 778         {
 779                 cd->Q931state = ST_U19;
 780         }
 781 }
 782
 783 /*---------------------------------------------------------------------------*
 784  *      L3 FSM state U19 event RELEASE from L2
 785  *---------------------------------------------------------------------------*/
 786 static void
 787 F_19J(call_desc_t *cd)
 788 {
 789         NDBGL3(L3_F_MSG, "FSM function F_19J executing");
 790         T308_stop(cd);
 791         i4b_l4_disconnect_ind(cd);
 792         freecd_by_cd(cd);
 793 }
 794
 795 /*---------------------------------------------------------------------------*
 796  *      L3 FSM state U19 event RELEASE COMPLETE from L2
 797  *---------------------------------------------------------------------------*/
 798 static void
 799 F_19K(call_desc_t *cd)
 800 {
 801         NDBGL3(L3_F_MSG, "FSM function F_19K executing");
 802         T308_stop(cd);
 803         i4b_l4_disconnect_ind(cd);
 804         freecd_by_cd(cd);
 805 }
 806
 807 /*---------------------------------------------------------------------------*
 808  *      L3 FSM state U19 event T308 timeout
 809  *---------------------------------------------------------------------------*/
 810 static void
 811 F_19W(call_desc_t *cd)
 812 {
 813         NDBGL3(L3_F_MSG, "FSM function F_19W executing");
 814         if(cd->T308_first_to == 0)
 815         {
 816                 cd->T308_first_to = 1;
 817                 i4b_l3_tx_release(cd, 0);
 818                 T308_start(cd);
 819                 cd->Q931state = ST_U19;
 820         }
 821         else
 822         {
 823                 cd->T308_first_to = 0;
 824                 i4b_l4_disconnect_ind(cd);
 825                 freecd_by_cd(cd);
 826                 cd->Q931state = ST_U0;
 827         }
 828 }
 829
 830 /*---------------------------------------------------------------------------*
 831  *      L3 FSM routine no change no action
 832  *---------------------------------------------------------------------------*/
 833 static void
 834 F_NCNA(call_desc_t *cd)
 835 {
 836 }
 837
 838 /*---------------------------------------------------------------------------*
 839  *      L3 FSM any state event STATUS ENQ from L2
 840  *---------------------------------------------------------------------------*/
 841 static void
 842 F_STENQ(call_desc_t *cd)
 843 {
 844         NDBGL3(L3_F_MSG, "FSM function F_STENQ executing");
 845         i4b_l3_tx_status(cd, CAUSE_Q850_STENQRSP); /* 30, resonse to stat enq */
 846 }
 847
 848 /*---------------------------------------------------------------------------*
 849  *      L3 FSM any state except 0 & 19 event STATUS from L2
 850  *---------------------------------------------------------------------------*/
 851 static void
 852 F_STAT(call_desc_t *cd)
 853 {
 854         NDBGL3(L3_F_MSG, "FSM function F_STAT executing");
 855         if(cd->call_state == 0)
 856         {
 857                 i4b_l4_status_ind(cd);
 858                 cd->Q931state = ST_U0;
 859                 freecd_by_cd(cd);
 860         }
 861         else
 862         {
 863                 /* XXX !!!!!!!!!!!!!!!!!! */
 864
 865                 i4b_l4_status_ind(cd);
 866                 cd->cause_out = 101;    /* message not compatible with call state */
 867                 i4b_l3_tx_disconnect(cd);
 868                 T305_start(cd);
 869                 cd->Q931state = ST_U11;
 870         }
 871 }
 872
 873 /*---------------------------------------------------------------------------*
 874  *      L3 FSM some states event INFORMATION from L2
 875  *---------------------------------------------------------------------------*/
 876 static void
 877 F_INFO(call_desc_t *cd)
 878 {
 879         NDBGL3(L3_F_MSG, "FSM function F_INFO executing");
 880         i4b_l4_info_ind(cd);
 881         /* remain in current state */
 882 }
 883
 884 /*---------------------------------------------------------------------------*
 885  *      L3 FSM T308 timeout while expecting RELEASE COMPLETE
 886  *---------------------------------------------------------------------------*/
 887 static void
 888 F_308TO(call_desc_t *cd)
 889 {
 890         NDBGL3(L3_F_MSG, "FSM function F_308TO executing");
 891         i4b_l3_stop_all_timers(cd);
 892         i4b_l4_disconnect_ind(cd);
 893         freecd_by_cd(cd);
 894 }
 895
 896 /*---------------------------------------------------------------------------*
 897  *      L3 FSM some states event RELEASE COMPLETE from L2
 898  *---------------------------------------------------------------------------*/
 899 static void
 900 F_RELCP(call_desc_t *cd)
 901 {
 902         NDBGL3(L3_F_MSG, "FSM function F_RELCP executing");
 903         i4b_l3_stop_all_timers(cd);
 904         i4b_l4_disconnect_ind(cd);
 905         freecd_by_cd(cd);
 906 }
 907
 908 /*---------------------------------------------------------------------------*
 909  *      L3 FSM some states event RELEASE from L2
 910  *---------------------------------------------------------------------------*/
 911 static void
 912 F_REL(call_desc_t *cd)
 913 {
 914         NDBGL3(L3_F_MSG, "FSM function F_REL executing");
 915         i4b_l3_stop_all_timers(cd);
 916         i4b_l3_tx_release_complete(cd, 0);
 917         i4b_l4_disconnect_ind(cd);
 918         freecd_by_cd(cd);
 919 }
 920
 921 /*---------------------------------------------------------------------------*
 922  *      L3 FSM some states event DISCONNECT from L2
 923  *---------------------------------------------------------------------------*/
 924 static void
 925 F_DISC(call_desc_t *cd)
 926 {
 927         NDBGL3(L3_F_MSG, "FSM function F_DISC executing");
 928         i4b_l3_stop_all_timers(cd);
 929
 930         /*
 931          * no disconnect ind to L4, no jump to state U12
 932          * instead we issue a RELEASE and jump to U19
 933          */
 934
 935         i4b_l3_tx_release(cd, 0);
 936         cd->T308_first_to = 1;
 937         T308_start(cd);
 938         cd->Q931state = ST_U19;
 939 }
 940
 941 /*---------------------------------------------------------------------------*
 942  *      L3 FSM some states event disconnect request from L4
 943  *---------------------------------------------------------------------------*/
 944 static void
 945 F_DCRQ(call_desc_t *cd)
 946 {
 947         NDBGL3(L3_F_MSG, "FSM function F_DCRQ executing");
 948
 949         /* stop T310 in case this is the result of an incoming call for a */
 950         /* calledback connection */
 951
 952         if(cd->T310 == TIMER_ACTIVE)
 953                 T310_stop(cd);
 954
 955         /* cause from L4 */
 956         i4b_l3_tx_disconnect(cd);
 957         T305_start(cd);
 958         cd->Q931state = ST_U11;
 959 }
 960
 961 /*---------------------------------------------------------------------------*
 962  *      L3 FSM any state except 0 event unexpected message from L2
 963  *---------------------------------------------------------------------------*/
 964 static void
 965 F_UEM(call_desc_t *cd)
 966 {
 967         NDBGL3(L3_F_ERR, "FSM function F_UEM executing, state = %s", print_l3state(cd));
 968         i4b_l3_tx_status(cd, CAUSE_Q850_MSGNCWCS); /* 101, message not compatible with call state */
 969 }
 970
 971 /*---------------------------------------------------------------------------*
 972  *      L3 FSM any state except 0 event SETUP from L2
 973  *---------------------------------------------------------------------------*/
 974 static void
 975 F_SIGN(call_desc_t *cd)
 976 {
 977         NDBGL3(L3_F_ERR, "FSM function F_SIGN executing");
 978
 979 /* XXX */ /* freecd_by_cd(cd); ?????????? XXX */
 980 }
 981
 982 /*---------------------------------------------------------------------------*
 983  *      L3 FSM relevant states event DL ESTABLISH IND from L2
 984  *---------------------------------------------------------------------------*/
 985 static void
 986 F_DLEI(call_desc_t *cd)
 987 {
 988         NDBGL3(L3_F_MSG, "FSM function F_DLEI executing");
 989
 990 /* XXX */
 991
 992         /* remain in current state */
 993 }
 994
 995 /*---------------------------------------------------------------------------*
 996  *      L3 FSM any state event illegal event occured
 997  *---------------------------------------------------------------------------*/
 998 static void
 999 F_ILL(call_desc_t *cd)
1000 {
1001         NDBGL3(L3_F_MSG, "FSM function F_ILL executing");
1002 }
1003
1004 /*---------------------------------------------------------------------------*
1005  *      L3 FSM any state event T309 timeout
1006  *---------------------------------------------------------------------------*/
1007 static void
1008 F_309TO(call_desc_t *cd)
1009 {
1010         NDBGL3(L3_F_ERR, "FSM function F_309TO executing");
1011
1012 /* XXX */
1013
1014 #ifdef NOTDEF
1015         i4b_l4_dl_fail_ind(cd);
1016 #endif
1017
1018         freecd_by_cd(cd);
1019 }
1020
1021 /*---------------------------------------------------------------------------*
1022  *      L3 FSM any state event FACILITY message received
1023  *---------------------------------------------------------------------------*/
1024 static void
1025 F_FCTY(call_desc_t *cd)
1026 {
1027         NDBGL3(L3_F_MSG, "FSM function F_FCTY executing");
1028         /* ST_SUSE, no change in state ! */
1029 }
1030
1031 /*---------------------------------------------------------------------------*
1032  *      L3 FSM state ST_OW event DL ESTABLISH CONF from L2
1033  *---------------------------------------------------------------------------*/
1034 static void
1035 F_DECF1(call_desc_t *cd)
1036 {
1037         NDBGL3(L3_F_MSG, "FSM function F_DECF1 executing");
1038         i4b_l3_tx_setup(cd);
1039 }
1040
1041 /*---------------------------------------------------------------------------*
1042  *      L3 FSM state ST_IWA event DL ESTABLISH CONF from L2
1043  *---------------------------------------------------------------------------*/
1044 static void
1045 F_DECF2(call_desc_t *cd)
1046 {
1047         NDBGL3(L3_F_MSG, "FSM function F_DECF2 executing");
1048         i4b_l3_tx_connect(cd);
1049 }
1050
1051 /*---------------------------------------------------------------------------*
1052  *      L3 FSM state ST_IWR event DL ESTABLISH CONF from L2
1053  *---------------------------------------------------------------------------*/
1054 static void
1055 F_DECF3(call_desc_t *cd)
1056 {
1057         NDBGL3(L3_F_MSG, "FSM function F_DECF3 executing");
1058         i4b_l3_tx_release_complete(cd, 1);
1059         freecd_by_cd(cd);
1060 }
1061
1062 /*---------------------------------------------------------------------------*
1063  *      L3 FSM state ST_IWL event DL ESTABLISH CONF from L2
1064  *---------------------------------------------------------------------------*/
1065 static void
1066 F_DECF4(call_desc_t *cd)
1067 {
1068         NDBGL3(L3_F_MSG, "FSM function F_DECF4 executing");
1069         i4b_l3_tx_alert(cd);
1070 }
1071
1072
1073 /*---------------------------------------------------------------------------*
1074  *      L3 FSM any state event DL ESTABLISH CONF from L2
1075  *---------------------------------------------------------------------------*/
1076 static void
1077 F_DECF(call_desc_t *cd)
1078 {
1079         NDBGL3(L3_F_MSG, "FSM function F_DECF executing");
1080         T309_stop(cd);
1081         i4b_l3_tx_status(cd, CAUSE_Q850_NORMUNSP); /* 31, normal unspecified */
1082 }
1083
1084 /*---------------------------------------------------------------------------*
1085  *      L3 FSM any state except U10 event DL RELEASE IND from L2
1086  *---------------------------------------------------------------------------*/
1087 static void
1088 F_DLRI(call_desc_t *cd)
1089 {
1090         NDBGL3(L3_F_MSG, "FSM function F_DLRI executing");
1091         i4b_l3_stop_all_timers(cd);
1092         i4b_l4_disconnect_ind(cd);
1093         freecd_by_cd(cd);
1094 }
1095
1096 /*---------------------------------------------------------------------------*
1097  *      L3 FSM state U10 event DL RELEASE IND from L2
1098  *---------------------------------------------------------------------------*/
1099 static void
1100 F_DLRIA(call_desc_t *cd)
1101 {
1102         NDBGL3(L3_F_MSG, "FSM function F_DLRIA executing");
1103
1104         if(cd->T309 == TIMER_IDLE)
1105                 T309_start(cd);
1106
1107         DL_Est_Req(ctrl_desc[cd->controller].unit);
1108 }
1109
1110 #endif /* NI4BQ931 > 0 */