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 1.6 2005/06/14 21:19:19 joerg 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 next_l3state(call_desc_t *cd, int event)
 219 {
 220         int currstate, newstate;
 221
 222         if(event > N_EVENTS)
 223                 panic("i4b_l3fsm.c: event > N_EVENTS\n");
 224
 225         currstate = cd->Q931state;
 226
 227         if(currstate > N_STATES)
 228                 panic("i4b_l3fsm.c: currstate > N_STATES\n");
 229
 230         newstate = l3state_tab[event][currstate].newstate;
 231
 232         if(newstate > N_STATES)
 233                 panic("i4b_l3fsm.c: newstate > N_STATES\n");
 234
 235         NDBGL3(L3_F_MSG, "L3 FSM event [%s]: [%s => %s]",
 236                                 l3event_text[event],
 237                                 l3state_text[currstate],
 238                                 l3state_text[newstate]);
 239
 240         /* execute function */
 241
 242         (*l3state_tab[event][currstate].func)(cd);
 243
 244         if(newstate == ST_ILL)
 245         {
 246                 newstate = currstate;
 247                 NDBGL3(L3_F_ERR, "FSM illegal state, state = %s, event = %s!",
 248                                 l3state_text[newstate],
 249                                 l3event_text[event]);
 250         }
 251
 252         if(newstate != ST_SUSE)
 253                 cd->Q931state = newstate;
 254 }
 255
 256 #if DO_I4B_DEBUG
 257 /*---------------------------------------------------------------------------*
 258  *      return pointer to current state description
 259  *---------------------------------------------------------------------------*/
 260 char *print_l3state(call_desc_t *cd)
 261 {
 262         return((char *) l3state_text[cd->Q931state]);
 263 }
 264 #endif
 265
 266 /*---------------------------------------------------------------------------*
 267  *      L3 FSM state U0 event L4 setup req
 268  *---------------------------------------------------------------------------*/
 269 static void F_00A(call_desc_t *cd)
 270 {
 271         NDBGL3(L3_F_MSG, "FSM function F_00A executing");
 272
 273         cd->T303_first_to = 1;
 274         T303_start(cd);
 275
 276         crit_enter();
 277         if(i4b_get_dl_stat(cd) == DL_DOWN)
 278         {
 279                 crit_exit();
 280                 DL_Est_Req(ctrl_desc[cd->controller].unit);
 281                 cd->Q931state = ST_OW;
 282         }
 283         else
 284         {
 285                 cd->Q931state = ST_U1;
 286                 crit_exit();
 287                 i4b_l3_tx_setup(cd);
 288         }
 289 }
 290
 291 /*---------------------------------------------------------------------------*
 292  *      L3 FSM state U0 event SETUP from L2
 293  *---------------------------------------------------------------------------*/
 294 static void F_00H(call_desc_t *cd)
 295 {
 296         NDBGL3(L3_F_MSG, "FSM function F_00H executing");
 297         i4b_l4_connect_ind(cd); /* tell l4 we have an incoming setup */
 298 }
 299
 300 /*---------------------------------------------------------------------------*
 301  *      L3 FSM state U0 event STATUS from L2
 302  *---------------------------------------------------------------------------*/
 303 static void F_00I(call_desc_t *cd)
 304 {
 305         NDBGL3(L3_F_MSG, "FSM function F_00I executing");
 306
 307         if(cd->call_state != 0)
 308         {
 309                 cd->cause_out = 101;
 310                 i4b_l3_tx_release_complete(cd, 1);      /* 1 = send cause */
 311         }
 312         cd->Q931state = ST_U0;
 313 }
 314
 315 /*---------------------------------------------------------------------------*
 316  *      L3 FSM state U0 event RELEASE from L2
 317  *---------------------------------------------------------------------------*/
 318 static void F_00J(call_desc_t *cd)
 319 {
 320         NDBGL3(L3_F_MSG, "FSM function F_00J executing");
 321         i4b_l3_tx_release_complete(cd, 0);      /* 0 = don't send cause */
 322 }
 323
 324 /*---------------------------------------------------------------------------*
 325  *      L3 FSM state U1 event disconnect req from L4
 326  *---------------------------------------------------------------------------*/
 327 static void F_01B(call_desc_t *cd)
 328 {
 329         NDBGL3(L3_F_MSG, "FSM function F_01B executing");
 330         /* cause from L4 */
 331         i4b_l3_tx_disconnect(cd);
 332         T303_stop(cd);
 333         T305_start(cd);
 334 }
 335
 336 /*---------------------------------------------------------------------------*
 337  *      L3 FSM state U1 event RELEASE COMPLETE from L2
 338  *---------------------------------------------------------------------------*/
 339 static void F_01K(call_desc_t *cd)
 340 {
 341         NDBGL3(L3_F_MSG, "FSM function F_01K executing");
 342         T303_stop(cd);
 343         i4b_l4_disconnect_ind(cd);      /* tell l4 we were rejected */
 344         freecd_by_cd(cd);
 345 }
 346
 347 /*---------------------------------------------------------------------------*
 348  *      L3 FSM state U1 event SETUP ACK from L2
 349  *---------------------------------------------------------------------------*/
 350 static void F_01L(call_desc_t *cd)
 351 {
 352         NDBGL3(L3_F_MSG, "FSM function F_01L executing");
 353         T303_stop(cd);
 354
 355         /*
 356          * since this implementation does NOT support overlap sending,
 357          * we react here as if we received a CALL PROCEEDING because
 358          * several PBX's react with a SETUP ACK even if the called
 359          * number is complete AND we sent a SENDING COMPLETE in the
 360          * preceding SETUP message. (-hm)
 361          */
 362
 363         T310_start(cd);
 364         i4b_l4_proceeding_ind(cd);
 365 }
 366
 367 /*---------------------------------------------------------------------------*
 368  *      L3 FSM state U1 event CALL PROCEEDING from L2
 369  *---------------------------------------------------------------------------*/
 370 static void F_01M(call_desc_t *cd)
 371 {
 372         NDBGL3(L3_F_MSG, "FSM function F_01M executing");
 373         T303_stop(cd);
 374         T310_start(cd);
 375         i4b_l4_proceeding_ind(cd);
 376 }
 377
 378 /*---------------------------------------------------------------------------*
 379  *      L3 FSM state U1 event ALERT from L2  (XXX !)
 380  *---------------------------------------------------------------------------*/
 381 static void F_01N(call_desc_t *cd)
 382 {
 383         NDBGL3(L3_F_MSG, "FSM function F_01N executing");
 384         T303_stop(cd);
 385         i4b_l4_alert_ind(cd);
 386 }
 387
 388 /*---------------------------------------------------------------------------*
 389  *      L3 FSM state U1 event CONNECT from L2 (XXX !)
 390  *---------------------------------------------------------------------------*/
 391 static void F_01O(call_desc_t *cd)
 392 {
 393         NDBGL3(L3_F_MSG, "FSM function F_01O executing");
 394         T303_stop(cd);
 395         i4b_l3_tx_connect_ack(cd);
 396         i4b_l4_connect_active_ind(cd);
 397 }
 398
 399 /*---------------------------------------------------------------------------*
 400  *      L3 FSM state U1 event T303 timeout
 401  *---------------------------------------------------------------------------*/
 402 static void F_01U(call_desc_t *cd)
 403 {
 404         NDBGL3(L3_F_MSG, "FSM function F_01U executing");
 405         if(cd->T303_first_to == 1)
 406         {
 407                 cd->T303_first_to = 0;
 408                 i4b_l3_tx_setup(cd);
 409                 T303_start(cd);
 410                 cd->Q931state = ST_U1;
 411         }
 412         else
 413         {
 414                 i4b_l4_disconnect_ind(cd);
 415                 freecd_by_cd(cd);
 416                 cd->Q931state = ST_U0;
 417         }
 418 }
 419
 420 /*---------------------------------------------------------------------------*
 421  *      L3 FSM state U3 event release req from L4
 422  *---------------------------------------------------------------------------*/
 423 static void F_03C(call_desc_t *cd)
 424 {
 425         NDBGL3(L3_F_MSG, "FSM function F_03C executing");
 426         T310_stop(cd);
 427         cd->cause_out = 6;
 428         i4b_l3_tx_release(cd, 1);       /* 0 = don't send cause */
 429         cd->T308_first_to = 1;
 430         T308_start(cd);
 431 }
 432
 433 /*---------------------------------------------------------------------------*
 434  *      L3 FSM state U3 event ALERT from L2
 435  *---------------------------------------------------------------------------*/
 436 static void F_03N(call_desc_t *cd)
 437 {
 438         NDBGL3(L3_F_MSG, "FSM function F_03N executing");
 439         T310_stop(cd);
 440         i4b_l4_alert_ind(cd);
 441 }
 442
 443 /*---------------------------------------------------------------------------*
 444  *      L3 FSM state U3 event CONNECT from L2
 445  *---------------------------------------------------------------------------*/
 446 static void F_03O(call_desc_t *cd)
 447 {
 448         NDBGL3(L3_F_MSG, "FSM function F_03O executing");
 449         T310_stop(cd);
 450         i4b_l3_tx_connect_ack(cd);      /* CONNECT ACK to network */
 451         i4b_l4_connect_active_ind(cd);
 452 }
 453
 454 /*---------------------------------------------------------------------------*
 455  *      L3 FSM state U3 event PROGESS IND from L2
 456  *---------------------------------------------------------------------------*/
 457 static void F_03P(call_desc_t *cd)
 458 {
 459         NDBGL3(L3_F_MSG, "FSM function F_03P executing");
 460         T310_stop(cd);
 461 #ifdef NOTDEF
 462         i4b_l4_progress_ind(cd);
 463 #endif
 464 }
 465
 466 /*---------------------------------------------------------------------------*
 467  *      L3 FSM state U3 event T310 timeout
 468  *---------------------------------------------------------------------------*/
 469 static void F_03Y(call_desc_t *cd)
 470 {
 471         NDBGL3(L3_F_MSG, "FSM function F_03Y executing");
 472         cd->cause_out = 102;    /* recovery on timer expiry */
 473         i4b_l3_tx_disconnect(cd);
 474         T305_start(cd);
 475         i4b_l4_disconnect_ind(cd);
 476 }
 477
 478 /*---------------------------------------------------------------------------*
 479  *      L3 FSM state U4 event CONNECT from L2
 480  *---------------------------------------------------------------------------*/
 481 static void F_04O(call_desc_t *cd)
 482 {
 483         NDBGL3(L3_F_MSG, "FSM function F_04O executing");
 484         i4b_l3_tx_connect_ack(cd);      /* CONNECT ACK to network */
 485         i4b_l4_connect_active_ind(cd);
 486 }
 487
 488 /*---------------------------------------------------------------------------*
 489  *      L3 FSM state U6 event alert req from L4
 490  *---------------------------------------------------------------------------*/
 491 static void F_06D(call_desc_t *cd)
 492 {
 493         NDBGL3(L3_F_MSG, "FSM function F_06D executing");
 494
 495         if(i4b_get_dl_stat(cd) == DL_DOWN)
 496         {
 497                 DL_Est_Req(ctrl_desc[cd->controller].unit);
 498                 cd->Q931state = ST_IWL;
 499         }
 500         else
 501         {
 502                 i4b_l3_tx_alert(cd);
 503                 cd->Q931state = ST_U7;
 504         }
 505 }
 506
 507 /*---------------------------------------------------------------------------*
 508  *      L3 FSM state U6 event incoming setup accept from L4
 509  *---------------------------------------------------------------------------*/
 510 static void F_06E(call_desc_t *cd)
 511 {
 512         NDBGL3(L3_F_MSG, "FSM function F_06E executing");
 513
 514         if(i4b_get_dl_stat(cd) == DL_DOWN)
 515         {
 516                 DL_Est_Req(ctrl_desc[cd->controller].unit);
 517                 cd->Q931state = ST_IWA;
 518         }
 519         else
 520         {
 521                 i4b_l3_tx_connect(cd);
 522                 cd->Q931state = ST_U8;
 523         }
 524         T313_start(cd);
 525 }
 526
 527 /*---------------------------------------------------------------------------*
 528  *      L3 FSM state U6 event incoming setup reject from L4
 529  *---------------------------------------------------------------------------*/
 530 static void F_06F(call_desc_t *cd)
 531 {
 532         NDBGL3(L3_F_MSG, "FSM function F_06F executing");
 533
 534         if(i4b_get_dl_stat(cd) == DL_DOWN)
 535         {
 536                 DL_Est_Req(ctrl_desc[cd->controller].unit);
 537                 cd->Q931state = ST_IWR;
 538         }
 539         else
 540         {
 541                 crit_enter();
 542                 i4b_l3_tx_release_complete(cd, 1);
 543                 cd->Q931state = ST_U0;
 544                 freecd_by_cd(cd);
 545                 crit_exit();
 546         }
 547 }
 548
 549 /*---------------------------------------------------------------------------*
 550  *      L3 FSM state U6 event incoming setup ignore from L4
 551  *---------------------------------------------------------------------------*/
 552 static void F_06G(call_desc_t *cd)
 553 {
 554         NDBGL3(L3_F_MSG, "FSM function F_06G executing");
 555         freecd_by_cd(cd);
 556 }
 557
 558 /*---------------------------------------------------------------------------*
 559  *      L3 FSM state U6 event RELEASE from L2
 560  *---------------------------------------------------------------------------*/
 561 static void F_06J(call_desc_t *cd)
 562 {
 563         NDBGL3(L3_F_MSG, "FSM function F_06J executing");
 564         i4b_l3_tx_release_complete(cd, 0);
 565         i4b_l4_disconnect_ind(cd);
 566         freecd_by_cd(cd);
 567 }
 568
 569 /*---------------------------------------------------------------------------*
 570  *      L3 FSM state U6 event DISCONNECT from L2
 571  *---------------------------------------------------------------------------*/
 572 static void F_06Q(call_desc_t *cd)
 573 {
 574         NDBGL3(L3_F_MSG, "FSM function F_06Q executing");
 575         i4b_l4_disconnect_ind(cd);
 576 }
 577
 578 /*---------------------------------------------------------------------------*
 579  *      L3 FSM state U7 event setup response accept from L4
 580  *---------------------------------------------------------------------------*/
 581 static void F_07E(call_desc_t *cd)
 582 {
 583         NDBGL3(L3_F_MSG, "FSM function F_07E executing");
 584         i4b_l3_tx_connect(cd);
 585         T313_start(cd);
 586 }
 587
 588 /*---------------------------------------------------------------------------*
 589  *      L3 FSM state U7 event setup response reject from L4
 590  *---------------------------------------------------------------------------*/
 591 static void F_07F(call_desc_t *cd)
 592 {
 593         NDBGL3(L3_F_MSG, "FSM function F_07F executing");
 594         i4b_l3_tx_release_complete(cd, 1);
 595         freecd_by_cd(cd);
 596 }
 597
 598 /*---------------------------------------------------------------------------*
 599  *      L3 FSM state U7 event setup response ignore from L4
 600  *---------------------------------------------------------------------------*/
 601 static void F_07G(call_desc_t *cd)
 602 {
 603         NDBGL3(L3_F_MSG, "FSM function F_07G executing");
 604         freecd_by_cd(cd);
 605 }
 606
 607 /*---------------------------------------------------------------------------*
 608  *      L3 FSM state U8 event CONNECT ACK from L2
 609  *---------------------------------------------------------------------------*/
 610 static void F_08R(call_desc_t *cd)
 611 {
 612         NDBGL3(L3_F_MSG, "FSM function F_08R executing");
 613         T313_stop(cd);
 614         i4b_l4_connect_active_ind(cd);
 615 }
 616
 617 /*---------------------------------------------------------------------------*
 618  *      L3 FSM state U8 event T313 timeout
 619  *---------------------------------------------------------------------------*/
 620 static void F_08Z(call_desc_t *cd)
 621 {
 622         NDBGL3(L3_F_MSG, "FSM function F_08Z executing");
 623         cd->cause_out = 102;    /* recovery on timer expiry */
 624         i4b_l3_tx_disconnect(cd);
 625         T305_start(cd);
 626         i4b_l4_disconnect_ind(cd);
 627 }
 628
 629 /*---------------------------------------------------------------------------*
 630  *      L3 FSM state U9 event alert req from L4
 631  *---------------------------------------------------------------------------*/
 632 static void F_09D(call_desc_t *cd)
 633 {
 634         NDBGL3(L3_F_MSG, "FSM function F_09D executing");
 635         i4b_l3_tx_alert(cd);
 636 }
 637
 638 /*---------------------------------------------------------------------------*
 639  *      L3 FSM state U9 event setup response accept from L4
 640  *---------------------------------------------------------------------------*/
 641 static void F_09E(call_desc_t *cd)
 642 {
 643         NDBGL3(L3_F_MSG, "FSM function F_09E executing");
 644         i4b_l3_tx_connect(cd);
 645         T313_start(cd);
 646 }
 647
 648 /*---------------------------------------------------------------------------*
 649  *      L3 FSM state U9 event setup response reject from L4
 650  *---------------------------------------------------------------------------*/
 651 static void F_09F(call_desc_t *cd)
 652 {
 653         NDBGL3(L3_F_MSG, "FSM function F_09F executing");
 654         i4b_l3_tx_release_complete(cd, 1);
 655         freecd_by_cd(cd);
 656 }
 657 /*---------------------------------------------------------------------------*
 658  *      L3 FSM state U9 event setup response ignore from L4
 659  *---------------------------------------------------------------------------*/
 660 static void F_09G(call_desc_t *cd)
 661 {
 662         NDBGL3(L3_F_MSG, "FSM function F_09G executing");
 663         freecd_by_cd(cd);
 664 }
 665
 666 /*---------------------------------------------------------------------------*
 667  *      L3 FSM state U11 event RELEASE from L2
 668  *---------------------------------------------------------------------------*/
 669 static void F_11J(call_desc_t *cd)
 670 {
 671         NDBGL3(L3_F_MSG, "FSM function F_11J executing");
 672         T305_stop(cd);
 673         i4b_l3_tx_release_complete(cd, 0);
 674         i4b_l4_disconnect_ind(cd);
 675         freecd_by_cd(cd);
 676 }
 677
 678 /*---------------------------------------------------------------------------*
 679  *      L3 FSM state U11 event DISCONNECT from L2
 680  *---------------------------------------------------------------------------*/
 681 static void F_11Q(call_desc_t *cd)
 682 {
 683         NDBGL3(L3_F_MSG, "FSM function F_11Q executing");
 684         T305_stop(cd);
 685         i4b_l3_tx_release(cd, 0);
 686         cd->T308_first_to = 1;
 687         T308_start(cd);
 688 }
 689
 690 /*---------------------------------------------------------------------------*
 691  *      L3 FSM state U11 event T305 timeout
 692  *---------------------------------------------------------------------------*/
 693 static void F_11V(call_desc_t *cd)
 694 {
 695         NDBGL3(L3_F_MSG, "FSM function F_11V executing");
 696         cd->cause_out = 102;
 697         i4b_l3_tx_release(cd, 1);
 698         cd->T308_first_to = 1;
 699         T308_start(cd);
 700 }
 701
 702 /*---------------------------------------------------------------------------*
 703  *      L3 FSM state U12 event release req from L4
 704  *---------------------------------------------------------------------------*/
 705 static void F_12C(call_desc_t *cd)
 706 {
 707         NDBGL3(L3_F_MSG, "FSM function F_12C executing");
 708         i4b_l3_tx_release(cd, 1);
 709         cd->T308_first_to = 1;
 710         T308_start(cd);
 711 }
 712
 713 /*---------------------------------------------------------------------------*
 714  *      L3 FSM state U12 event RELEASE from L2
 715  *---------------------------------------------------------------------------*/
 716 static void F_12J(call_desc_t *cd)
 717 {
 718         NDBGL3(L3_F_MSG, "FSM function F_12J executing");
 719         i4b_l3_tx_release_complete(cd, 0);
 720         i4b_l4_disconnect_ind(cd);
 721         freecd_by_cd(cd);
 722 }
 723
 724 /*---------------------------------------------------------------------------*
 725  *      L3 FSM state U19 event STATUS from L2
 726  *---------------------------------------------------------------------------*/
 727 static void F_19I(call_desc_t *cd)
 728 {
 729         NDBGL3(L3_F_MSG, "FSM function F_19I executing");
 730
 731         if(cd->call_state == 0)
 732         {
 733                 i4b_l4_status_ind(cd);
 734                 freecd_by_cd(cd);
 735                 cd->Q931state = ST_U0;
 736         }
 737         else
 738         {
 739                 cd->Q931state = ST_U19;
 740         }
 741 }
 742
 743 /*---------------------------------------------------------------------------*
 744  *      L3 FSM state U19 event RELEASE from L2
 745  *---------------------------------------------------------------------------*/
 746 static void F_19J(call_desc_t *cd)
 747 {
 748         NDBGL3(L3_F_MSG, "FSM function F_19J executing");
 749         T308_stop(cd);
 750         i4b_l4_disconnect_ind(cd);
 751         freecd_by_cd(cd);
 752 }
 753
 754 /*---------------------------------------------------------------------------*
 755  *      L3 FSM state U19 event RELEASE COMPLETE from L2
 756  *---------------------------------------------------------------------------*/
 757 static void F_19K(call_desc_t *cd)
 758 {
 759         NDBGL3(L3_F_MSG, "FSM function F_19K executing");
 760         T308_stop(cd);
 761         i4b_l4_disconnect_ind(cd);
 762         freecd_by_cd(cd);
 763 }
 764
 765 /*---------------------------------------------------------------------------*
 766  *      L3 FSM state U19 event T308 timeout
 767  *---------------------------------------------------------------------------*/
 768 static void F_19W(call_desc_t *cd)
 769 {
 770         NDBGL3(L3_F_MSG, "FSM function F_19W executing");
 771         if(cd->T308_first_to == 0)
 772         {
 773                 cd->T308_first_to = 1;
 774                 i4b_l3_tx_release(cd, 0);
 775                 T308_start(cd);
 776                 cd->Q931state = ST_U19;
 777         }
 778         else
 779         {
 780                 cd->T308_first_to = 0;
 781                 i4b_l4_disconnect_ind(cd);
 782                 freecd_by_cd(cd);
 783                 cd->Q931state = ST_U0;
 784         }
 785 }
 786
 787 /*---------------------------------------------------------------------------*
 788  *      L3 FSM routine no change no action
 789  *---------------------------------------------------------------------------*/
 790 static void F_NCNA(call_desc_t *cd)
 791 {
 792 }
 793
 794 /*---------------------------------------------------------------------------*
 795  *      L3 FSM any state event STATUS ENQ from L2
 796  *---------------------------------------------------------------------------*/
 797 static void F_STENQ(call_desc_t *cd)
 798 {
 799         NDBGL3(L3_F_MSG, "FSM function F_STENQ executing");
 800         i4b_l3_tx_status(cd, CAUSE_Q850_STENQRSP); /* 30, resonse to stat enq */
 801 }
 802
 803 /*---------------------------------------------------------------------------*
 804  *      L3 FSM any state except 0 & 19 event STATUS from L2
 805  *---------------------------------------------------------------------------*/
 806 static void F_STAT(call_desc_t *cd)
 807 {
 808         NDBGL3(L3_F_MSG, "FSM function F_STAT executing");
 809         if(cd->call_state == 0)
 810         {
 811                 i4b_l4_status_ind(cd);
 812                 cd->Q931state = ST_U0;
 813                 freecd_by_cd(cd);
 814         }
 815         else
 816         {
 817                 /* XXX !!!!!!!!!!!!!!!!!! */
 818
 819                 i4b_l4_status_ind(cd);
 820                 cd->cause_out = 101;    /* message not compatible with call state */
 821                 i4b_l3_tx_disconnect(cd);
 822                 T305_start(cd);
 823                 cd->Q931state = ST_U11;
 824         }
 825 }
 826
 827 /*---------------------------------------------------------------------------*
 828  *      L3 FSM some states event INFORMATION from L2
 829  *---------------------------------------------------------------------------*/
 830 static void F_INFO(call_desc_t *cd)
 831 {
 832         NDBGL3(L3_F_MSG, "FSM function F_INFO executing");
 833         i4b_l4_info_ind(cd);
 834         /* remain in current state */
 835 }
 836
 837 /*---------------------------------------------------------------------------*
 838  *      L3 FSM T308 timeout while expecting RELEASE COMPLETE
 839  *---------------------------------------------------------------------------*/
 840 static void F_308TO(call_desc_t *cd)
 841 {
 842         NDBGL3(L3_F_MSG, "FSM function F_308TO executing");
 843         i4b_l3_stop_all_timers(cd);
 844         i4b_l4_disconnect_ind(cd);
 845         freecd_by_cd(cd);
 846 }
 847
 848 /*---------------------------------------------------------------------------*
 849  *      L3 FSM some states event RELEASE COMPLETE from L2
 850  *---------------------------------------------------------------------------*/
 851 static void F_RELCP(call_desc_t *cd)
 852 {
 853         NDBGL3(L3_F_MSG, "FSM function F_RELCP executing");
 854         i4b_l3_stop_all_timers(cd);
 855         i4b_l4_disconnect_ind(cd);
 856         freecd_by_cd(cd);
 857 }
 858
 859 /*---------------------------------------------------------------------------*
 860  *      L3 FSM some states event RELEASE from L2
 861  *---------------------------------------------------------------------------*/
 862 static void F_REL(call_desc_t *cd)
 863 {
 864         NDBGL3(L3_F_MSG, "FSM function F_REL executing");
 865         i4b_l3_stop_all_timers(cd);
 866         i4b_l3_tx_release_complete(cd, 0);
 867         i4b_l4_disconnect_ind(cd);
 868         freecd_by_cd(cd);
 869 }
 870
 871 /*---------------------------------------------------------------------------*
 872  *      L3 FSM some states event DISCONNECT from L2
 873  *---------------------------------------------------------------------------*/
 874 static void F_DISC(call_desc_t *cd)
 875 {
 876         NDBGL3(L3_F_MSG, "FSM function F_DISC executing");
 877         i4b_l3_stop_all_timers(cd);
 878
 879         /*
 880          * no disconnect ind to L4, no jump to state U12
 881          * instead we issue a RELEASE and jump to U19
 882          */
 883
 884         i4b_l3_tx_release(cd, 0);
 885         cd->T308_first_to = 1;
 886         T308_start(cd);
 887         cd->Q931state = ST_U19;
 888 }
 889
 890 /*---------------------------------------------------------------------------*
 891  *      L3 FSM some states event disconnect request from L4
 892  *---------------------------------------------------------------------------*/
 893 static void F_DCRQ(call_desc_t *cd)
 894 {
 895         NDBGL3(L3_F_MSG, "FSM function F_DCRQ executing");
 896
 897         /* stop T310 in case this is the result of an incoming call for a */
 898         /* calledback connection */
 899
 900         if(cd->T310 == TIMER_ACTIVE)
 901                 T310_stop(cd);
 902
 903         /* cause from L4 */
 904         i4b_l3_tx_disconnect(cd);
 905         T305_start(cd);
 906         cd->Q931state = ST_U11;
 907 }
 908
 909 /*---------------------------------------------------------------------------*
 910  *      L3 FSM any state except 0 event unexpected message from L2
 911  *---------------------------------------------------------------------------*/
 912 static void F_UEM(call_desc_t *cd)
 913 {
 914         NDBGL3(L3_F_ERR, "FSM function F_UEM executing, state = %s", print_l3state(cd));
 915         i4b_l3_tx_status(cd, CAUSE_Q850_MSGNCWCS); /* 101, message not compatible with call state */
 916 }
 917
 918 /*---------------------------------------------------------------------------*
 919  *      L3 FSM any state except 0 event SETUP from L2
 920  *---------------------------------------------------------------------------*/
 921 static void F_SIGN(call_desc_t *cd)
 922 {
 923         NDBGL3(L3_F_ERR, "FSM function F_SIGN executing");
 924
 925 /* XXX */ /* freecd_by_cd(cd); ?????????? XXX */
 926 }
 927
 928 /*---------------------------------------------------------------------------*
 929  *      L3 FSM relevant states event DL ESTABLISH IND from L2
 930  *---------------------------------------------------------------------------*/
 931 static void F_DLEI(call_desc_t *cd)
 932 {
 933         NDBGL3(L3_F_MSG, "FSM function F_DLEI executing");
 934
 935 /* XXX */
 936
 937         /* remain in current state */
 938 }
 939
 940 /*---------------------------------------------------------------------------*
 941  *      L3 FSM any state event illegal event occured
 942  *---------------------------------------------------------------------------*/
 943 static void F_ILL(call_desc_t *cd)
 944 {
 945         NDBGL3(L3_F_MSG, "FSM function F_ILL executing");
 946 }
 947
 948 /*---------------------------------------------------------------------------*
 949  *      L3 FSM any state event T309 timeout
 950  *---------------------------------------------------------------------------*/
 951 static void F_309TO(call_desc_t *cd)
 952 {
 953         NDBGL3(L3_F_ERR, "FSM function F_309TO executing");
 954
 955 /* XXX */
 956
 957 #ifdef NOTDEF
 958         i4b_l4_dl_fail_ind(cd);
 959 #endif
 960
 961         freecd_by_cd(cd);
 962 }
 963
 964 /*---------------------------------------------------------------------------*
 965  *      L3 FSM any state event FACILITY message received
 966  *---------------------------------------------------------------------------*/
 967 static void F_FCTY(call_desc_t *cd)
 968 {
 969         NDBGL3(L3_F_MSG, "FSM function F_FCTY executing");
 970         /* ST_SUSE, no change in state ! */
 971 }
 972
 973 /*---------------------------------------------------------------------------*
 974  *      L3 FSM state ST_OW event DL ESTABLISH CONF from L2
 975  *---------------------------------------------------------------------------*/
 976 static void F_DECF1(call_desc_t *cd)
 977 {
 978         NDBGL3(L3_F_MSG, "FSM function F_DECF1 executing");
 979         i4b_l3_tx_setup(cd);
 980 }
 981
 982 /*---------------------------------------------------------------------------*
 983  *      L3 FSM state ST_IWA event DL ESTABLISH CONF from L2
 984  *---------------------------------------------------------------------------*/
 985 static void F_DECF2(call_desc_t *cd)
 986 {
 987         NDBGL3(L3_F_MSG, "FSM function F_DECF2 executing");
 988         i4b_l3_tx_connect(cd);
 989 }
 990
 991 /*---------------------------------------------------------------------------*
 992  *      L3 FSM state ST_IWR event DL ESTABLISH CONF from L2
 993  *---------------------------------------------------------------------------*/
 994 static void F_DECF3(call_desc_t *cd)
 995 {
 996         NDBGL3(L3_F_MSG, "FSM function F_DECF3 executing");
 997         i4b_l3_tx_release_complete(cd, 1);
 998         freecd_by_cd(cd);
 999 }
1000
1001 /*---------------------------------------------------------------------------*
1002  *      L3 FSM state ST_IWL event DL ESTABLISH CONF from L2
1003  *---------------------------------------------------------------------------*/
1004 static void F_DECF4(call_desc_t *cd)
1005 {
1006         NDBGL3(L3_F_MSG, "FSM function F_DECF4 executing");
1007         i4b_l3_tx_alert(cd);
1008 }
1009
1010
1011 /*---------------------------------------------------------------------------*
1012  *      L3 FSM any state event DL ESTABLISH CONF from L2
1013  *---------------------------------------------------------------------------*/
1014 static void F_DECF(call_desc_t *cd)
1015 {
1016         NDBGL3(L3_F_MSG, "FSM function F_DECF executing");
1017         T309_stop(cd);
1018         i4b_l3_tx_status(cd, CAUSE_Q850_NORMUNSP); /* 31, normal unspecified */
1019 }
1020
1021 /*---------------------------------------------------------------------------*
1022  *      L3 FSM any state except U10 event DL RELEASE IND from L2
1023  *---------------------------------------------------------------------------*/
1024 static void F_DLRI(call_desc_t *cd)
1025 {
1026         NDBGL3(L3_F_MSG, "FSM function F_DLRI executing");
1027         i4b_l3_stop_all_timers(cd);
1028         i4b_l4_disconnect_ind(cd);
1029         freecd_by_cd(cd);
1030 }
1031
1032 /*---------------------------------------------------------------------------*
1033  *      L3 FSM state U10 event DL RELEASE IND from L2
1034  *---------------------------------------------------------------------------*/
1035 static void F_DLRIA(call_desc_t *cd)
1036 {
1037         NDBGL3(L3_F_MSG, "FSM function F_DLRIA executing");
1038
1039         if(cd->T309 == TIMER_IDLE)
1040                 T309_start(cd);
1041
1042         DL_Est_Req(ctrl_desc[cd->controller].unit);
1043 }
1044
1045 #endif /* NI4BQ931 > 0 */