2 * Copyright (c) 1997, 2000 Hellmuth Michaelis. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
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
25 *---------------------------------------------------------------------------
27 * i4b_tei.c - tei handling procedures
28 * -----------------------------------
30 * $Id: i4b_tei.c,v 1.25 2000/09/01 14:11:51 hm Exp $
32 * $FreeBSD: src/sys/i4b/layer2/i4b_tei.c,v 1.6.2.2 2001/08/10 14:08:41 obrien Exp $
33 * $DragonFly: src/sys/net/i4b/layer2/i4b_tei.c,v 1.4 2003/08/07 21:17:29 dillon Exp $
35 * last edit-date: [Fri Oct 13 15:56:35 2000]
37 *---------------------------------------------------------------------------*/
40 #include "use_i4bq921.h"
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/syslog.h>
50 #include <sys/socket.h>
53 #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
54 #include <sys/callout.h>
58 #include <net/i4b/include/machine/i4b_debug.h>
60 #include <i4b/i4b_debug.h>
61 #include <i4b/i4b_ioctl.h>
64 #include "../include/i4b_global.h"
65 #include "../include/i4b_l1l2.h"
66 #include "../include/i4b_l2l3.h"
67 #include "../include/i4b_mbuf.h"
70 #include "i4b_l2fsm.h"
72 /*---------------------------------------------------------------------------*
73 * handle a received TEI management frame
74 *---------------------------------------------------------------------------*/
76 i4b_tei_rxframe(int unit, struct mbuf *m)
78 l2_softc_t *l2sc = &l2_softc[unit];
79 u_char *ptr = m->m_data;
81 switch(*(ptr + OFF_MT))
84 if( (*(ptr + OFF_RIL) == l2sc->last_ril) &&
85 (*(ptr + OFF_RIH) == l2sc->last_rih))
87 l2sc->tei = GET_TEIFROMAI(*(ptr+OFF_AI));
88 l2sc->tei_valid = TEI_VALID;
90 if(l2sc->T202 == TIMER_ACTIVE)
93 MDL_Status_Ind(l2sc->unit, STI_TEIASG, l2sc->tei);
95 log(LOG_INFO, "i4b: unit %d, assigned TEI = %d = 0x%02x\n", l2sc->unit, l2sc->tei, l2sc->tei);
97 NDBGL2(L2_TEI_MSG, "TEI ID Assign - TEI = %d", l2sc->tei);
99 i4b_next_l2state(l2sc, EV_MDASGRQ);
104 if( (*(ptr + OFF_RIL) == l2sc->last_ril) &&
105 (*(ptr + OFF_RIH) == l2sc->last_rih))
107 l2sc->tei_valid = TEI_INVALID;
108 l2sc->tei = GET_TEIFROMAI(*(ptr+OFF_AI));
110 if(l2sc->tei == GROUP_TEI)
112 log(LOG_WARNING, "i4b: unit %d, denied TEI, no TEI values available from exchange!\n", l2sc->unit);
113 NDBGL2(L2_TEI_ERR, "TEI ID Denied, No TEI values available from exchange!");
117 log(LOG_WARNING, "i4b: unit %d, denied TEI = %d = 0x%02x\n", l2sc->unit, l2sc->tei, l2sc->tei);
118 NDBGL2(L2_TEI_ERR, "TEI ID Denied - TEI = %d", l2sc->tei);
120 MDL_Status_Ind(l2sc->unit, STI_TEIASG, -1);
121 i4b_next_l2state(l2sc, EV_MDERRRS);
126 if( (l2sc->tei_valid == TEI_VALID) &&
127 ( (l2sc->tei == GET_TEIFROMAI(*(ptr+OFF_AI))) ||
128 (GROUP_TEI == GET_TEIFROMAI(*(ptr+OFF_AI))) ))
130 static int lasttei = -1;
132 if(l2sc->tei != lasttei)
134 NDBGL2(L2_TEI_MSG, "TEI ID Check Req - TEI = %d", l2sc->tei);
138 if(l2sc->T202 == TIMER_ACTIVE)
140 i4b_tei_chkresp(l2sc);
145 if( (l2sc->tei_valid == TEI_VALID) &&
146 ( (l2sc->tei == GET_TEIFROMAI(*(ptr+OFF_AI))) ||
147 (l2sc->tei == GET_TEIFROMAI(*(ptr+OFF_AI)))))
149 l2sc->tei_valid = TEI_INVALID;
150 l2sc->tei = GET_TEIFROMAI(*(ptr+OFF_AI));
152 log(LOG_INFO, "i4b: unit %d, removed TEI = %d = 0x%02x\n", l2sc->unit, l2sc->tei, l2sc->tei);
153 NDBGL2(L2_TEI_MSG, "TEI ID Remove - TEI = %d", l2sc->tei);
154 MDL_Status_Ind(l2sc->unit, STI_TEIASG, -1);
155 i4b_next_l2state(l2sc, EV_MDREMRQ);
160 NDBGL2(L2_TEI_ERR, "UNKNOWN TEI MGMT Frame, type = 0x%x", *(ptr + OFF_MT));
161 i4b_print_frame(m->m_len, m->m_data);
167 /*---------------------------------------------------------------------------*
168 * allocate and fill up a TEI management frame for sending
169 *---------------------------------------------------------------------------*/
171 build_tei_mgmt_frame(l2_softc_t *l2sc, unsigned char type)
175 if((m = i4b_Dgetmbuf(TEI_MGMT_FRM_LEN)) == NULL)
178 m->m_data[TEIM_SAPIO] = 0xfc; /* SAPI = 63, CR = 0, EA = 0 */
179 m->m_data[TEIM_TEIO] = 0xff; /* TEI = 127, EA = 1 */
180 m->m_data[TEIM_UIO] = UI; /* UI */
181 m->m_data[TEIM_MEIO] = MEI; /* MEI */
182 m->m_data[TEIM_MTO] = type; /* message type */
187 i4b_make_rand_ri(l2sc);
188 m->m_data[TEIM_RILO] = l2sc->last_ril;
189 m->m_data[TEIM_RIHO] = l2sc->last_rih;
190 m->m_data[TEIM_AIO] = (GROUP_TEI << 1) | 0x01;
194 i4b_make_rand_ri(l2sc);
195 m->m_data[TEIM_RILO] = l2sc->last_ril;
196 m->m_data[TEIM_RIHO] = l2sc->last_rih;
197 m->m_data[TEIM_AIO] = (l2sc->tei << 1) | 0x01;
201 m->m_data[TEIM_RILO] = 0;
202 m->m_data[TEIM_RIHO] = 0;
203 m->m_data[TEIM_AIO] = (l2sc->tei << 1) | 0x01;
208 panic("build_tei_mgmt_frame: invalid type");
215 /*---------------------------------------------------------------------------*
216 * i4b_tei_assign - TEI assignment procedure (Q.921, 5.3.2, pp 24)
217 * T202func and N202 _MUST_ be set prior to calling this function !
218 *---------------------------------------------------------------------------*/
220 i4b_tei_assign(l2_softc_t *l2sc)
224 NDBGL2(L2_TEI_MSG, "tx TEI ID_Request");
226 m = build_tei_mgmt_frame(l2sc, MT_ID_REQEST);
229 panic("i4b_tei_assign: no mbuf");
231 i4b_T202_start(l2sc);
233 PH_Data_Req(l2sc->unit, m, MBUF_FREE);
236 /*---------------------------------------------------------------------------*
237 * i4b_tei_assign - TEI verify procedure (Q.921, 5.3.5, pp 29)
238 * T202func and N202 _MUST_ be set prior to calling this function !
239 *---------------------------------------------------------------------------*/
241 i4b_tei_verify(l2_softc_t *l2sc)
245 NDBGL2(L2_TEI_MSG, "tx TEI ID_Verify");
247 m = build_tei_mgmt_frame(l2sc, MT_ID_VERIFY);
250 panic("i4b_tei_verify: no mbuf");
252 i4b_T202_start(l2sc);
254 PH_Data_Req(l2sc->unit, m, MBUF_FREE);
257 /*---------------------------------------------------------------------------*
258 * i4b_tei_chkresp - TEI check response procedure (Q.921, 5.3.5, pp 29)
259 *---------------------------------------------------------------------------*/
261 i4b_tei_chkresp(l2_softc_t *l2sc)
264 static int lasttei = 0;
266 if(l2sc->tei != lasttei)
269 NDBGL2(L2_TEI_MSG, "tx TEI ID_Check_Response");
272 m = build_tei_mgmt_frame(l2sc, MT_ID_CHK_RSP);
275 panic("i4b_tei_chkresp: no mbuf");
277 PH_Data_Req(l2sc->unit, m, MBUF_FREE);
280 /*---------------------------------------------------------------------------*
281 * generate some 16 bit "random" number used for TEI mgmt Ri field
282 *---------------------------------------------------------------------------*/
284 i4b_make_rand_ri(l2_softc_t *l2sc)
287 #if defined(__FreeBSD__)
292 read_random((char *)&val, sizeof(val));
294 val = (u_short)random();
295 #endif /* RANDOMDEV */
301 static int called = 42;
303 val = (l2sc->last_rih << 8) | l2sc->last_ril;
307 for(i=0; i < 50 ; i++, val++)
311 val ^= (time.tv_sec >> 16) ^ time.tv_usec;
313 val ^= time.tv_sec ^ (time.tv_usec >> 16);
315 if(val != 0 && val != 0xffff)
319 l2sc->last_rih = (val >> 8) & 0x00ff;
320 l2sc->last_ril = val & 0x00ff;
323 #endif /* NI4BQ921 > 0 */