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 $
34 * last edit-date: [Fri Oct 13 15:56:35 2000]
36 *---------------------------------------------------------------------------*/
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/syslog.h>
49 #include <sys/socket.h>
52 #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
53 #include <sys/callout.h>
57 #include <machine/i4b_debug.h>
59 #include <i4b/i4b_debug.h>
60 #include <i4b/i4b_ioctl.h>
63 #include <i4b/include/i4b_global.h>
64 #include <i4b/include/i4b_l1l2.h>
65 #include <i4b/include/i4b_l2l3.h>
66 #include <i4b/include/i4b_mbuf.h>
68 #include <i4b/layer2/i4b_l2.h>
69 #include <i4b/layer2/i4b_l2fsm.h>
71 /*---------------------------------------------------------------------------*
72 * handle a received TEI management frame
73 *---------------------------------------------------------------------------*/
75 i4b_tei_rxframe(int unit, struct mbuf *m)
77 l2_softc_t *l2sc = &l2_softc[unit];
78 u_char *ptr = m->m_data;
80 switch(*(ptr + OFF_MT))
83 if( (*(ptr + OFF_RIL) == l2sc->last_ril) &&
84 (*(ptr + OFF_RIH) == l2sc->last_rih))
86 l2sc->tei = GET_TEIFROMAI(*(ptr+OFF_AI));
87 l2sc->tei_valid = TEI_VALID;
89 if(l2sc->T202 == TIMER_ACTIVE)
92 MDL_Status_Ind(l2sc->unit, STI_TEIASG, l2sc->tei);
94 log(LOG_INFO, "i4b: unit %d, assigned TEI = %d = 0x%02x\n", l2sc->unit, l2sc->tei, l2sc->tei);
96 NDBGL2(L2_TEI_MSG, "TEI ID Assign - TEI = %d", l2sc->tei);
98 i4b_next_l2state(l2sc, EV_MDASGRQ);
103 if( (*(ptr + OFF_RIL) == l2sc->last_ril) &&
104 (*(ptr + OFF_RIH) == l2sc->last_rih))
106 l2sc->tei_valid = TEI_INVALID;
107 l2sc->tei = GET_TEIFROMAI(*(ptr+OFF_AI));
109 if(l2sc->tei == GROUP_TEI)
111 log(LOG_WARNING, "i4b: unit %d, denied TEI, no TEI values available from exchange!\n", l2sc->unit);
112 NDBGL2(L2_TEI_ERR, "TEI ID Denied, No TEI values available from exchange!");
116 log(LOG_WARNING, "i4b: unit %d, denied TEI = %d = 0x%02x\n", l2sc->unit, l2sc->tei, l2sc->tei);
117 NDBGL2(L2_TEI_ERR, "TEI ID Denied - TEI = %d", l2sc->tei);
119 MDL_Status_Ind(l2sc->unit, STI_TEIASG, -1);
120 i4b_next_l2state(l2sc, EV_MDERRRS);
125 if( (l2sc->tei_valid == TEI_VALID) &&
126 ( (l2sc->tei == GET_TEIFROMAI(*(ptr+OFF_AI))) ||
127 (GROUP_TEI == GET_TEIFROMAI(*(ptr+OFF_AI))) ))
129 static int lasttei = -1;
131 if(l2sc->tei != lasttei)
133 NDBGL2(L2_TEI_MSG, "TEI ID Check Req - TEI = %d", l2sc->tei);
137 if(l2sc->T202 == TIMER_ACTIVE)
139 i4b_tei_chkresp(l2sc);
144 if( (l2sc->tei_valid == TEI_VALID) &&
145 ( (l2sc->tei == GET_TEIFROMAI(*(ptr+OFF_AI))) ||
146 (l2sc->tei == GET_TEIFROMAI(*(ptr+OFF_AI)))))
148 l2sc->tei_valid = TEI_INVALID;
149 l2sc->tei = GET_TEIFROMAI(*(ptr+OFF_AI));
151 log(LOG_INFO, "i4b: unit %d, removed TEI = %d = 0x%02x\n", l2sc->unit, l2sc->tei, l2sc->tei);
152 NDBGL2(L2_TEI_MSG, "TEI ID Remove - TEI = %d", l2sc->tei);
153 MDL_Status_Ind(l2sc->unit, STI_TEIASG, -1);
154 i4b_next_l2state(l2sc, EV_MDREMRQ);
159 NDBGL2(L2_TEI_ERR, "UNKNOWN TEI MGMT Frame, type = 0x%x", *(ptr + OFF_MT));
160 i4b_print_frame(m->m_len, m->m_data);
166 /*---------------------------------------------------------------------------*
167 * allocate and fill up a TEI management frame for sending
168 *---------------------------------------------------------------------------*/
170 build_tei_mgmt_frame(l2_softc_t *l2sc, unsigned char type)
174 if((m = i4b_Dgetmbuf(TEI_MGMT_FRM_LEN)) == NULL)
177 m->m_data[TEIM_SAPIO] = 0xfc; /* SAPI = 63, CR = 0, EA = 0 */
178 m->m_data[TEIM_TEIO] = 0xff; /* TEI = 127, EA = 1 */
179 m->m_data[TEIM_UIO] = UI; /* UI */
180 m->m_data[TEIM_MEIO] = MEI; /* MEI */
181 m->m_data[TEIM_MTO] = type; /* message type */
186 i4b_make_rand_ri(l2sc);
187 m->m_data[TEIM_RILO] = l2sc->last_ril;
188 m->m_data[TEIM_RIHO] = l2sc->last_rih;
189 m->m_data[TEIM_AIO] = (GROUP_TEI << 1) | 0x01;
193 i4b_make_rand_ri(l2sc);
194 m->m_data[TEIM_RILO] = l2sc->last_ril;
195 m->m_data[TEIM_RIHO] = l2sc->last_rih;
196 m->m_data[TEIM_AIO] = (l2sc->tei << 1) | 0x01;
200 m->m_data[TEIM_RILO] = 0;
201 m->m_data[TEIM_RIHO] = 0;
202 m->m_data[TEIM_AIO] = (l2sc->tei << 1) | 0x01;
207 panic("build_tei_mgmt_frame: invalid type");
214 /*---------------------------------------------------------------------------*
215 * i4b_tei_assign - TEI assignment procedure (Q.921, 5.3.2, pp 24)
216 * T202func and N202 _MUST_ be set prior to calling this function !
217 *---------------------------------------------------------------------------*/
219 i4b_tei_assign(l2_softc_t *l2sc)
223 NDBGL2(L2_TEI_MSG, "tx TEI ID_Request");
225 m = build_tei_mgmt_frame(l2sc, MT_ID_REQEST);
228 panic("i4b_tei_assign: no mbuf");
230 i4b_T202_start(l2sc);
232 PH_Data_Req(l2sc->unit, m, MBUF_FREE);
235 /*---------------------------------------------------------------------------*
236 * i4b_tei_assign - TEI verify procedure (Q.921, 5.3.5, pp 29)
237 * T202func and N202 _MUST_ be set prior to calling this function !
238 *---------------------------------------------------------------------------*/
240 i4b_tei_verify(l2_softc_t *l2sc)
244 NDBGL2(L2_TEI_MSG, "tx TEI ID_Verify");
246 m = build_tei_mgmt_frame(l2sc, MT_ID_VERIFY);
249 panic("i4b_tei_verify: no mbuf");
251 i4b_T202_start(l2sc);
253 PH_Data_Req(l2sc->unit, m, MBUF_FREE);
256 /*---------------------------------------------------------------------------*
257 * i4b_tei_chkresp - TEI check response procedure (Q.921, 5.3.5, pp 29)
258 *---------------------------------------------------------------------------*/
260 i4b_tei_chkresp(l2_softc_t *l2sc)
263 static int lasttei = 0;
265 if(l2sc->tei != lasttei)
268 NDBGL2(L2_TEI_MSG, "tx TEI ID_Check_Response");
271 m = build_tei_mgmt_frame(l2sc, MT_ID_CHK_RSP);
274 panic("i4b_tei_chkresp: no mbuf");
276 PH_Data_Req(l2sc->unit, m, MBUF_FREE);
279 /*---------------------------------------------------------------------------*
280 * generate some 16 bit "random" number used for TEI mgmt Ri field
281 *---------------------------------------------------------------------------*/
283 i4b_make_rand_ri(l2_softc_t *l2sc)
286 #if defined(__FreeBSD__)
291 read_random((char *)&val, sizeof(val));
293 val = (u_short)random();
294 #endif /* RANDOMDEV */
298 register u_short val;
300 static int called = 42;
302 val = (l2sc->last_rih << 8) | l2sc->last_ril;
306 for(i=0; i < 50 ; i++, val++)
310 val ^= (time.tv_sec >> 16) ^ time.tv_usec;
312 val ^= time.tv_sec ^ (time.tv_usec >> 16);
314 if(val != 0 && val != 0xffff)
318 l2sc->last_rih = (val >> 8) & 0x00ff;
319 l2sc->last_ril = val & 0x00ff;
322 #endif /* NI4BQ921 > 0 */