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 1.7 2006/09/03 18:52:29 dillon Exp $
35 * last edit-date: [Fri Oct 13 15:56:35 2000]
37 *---------------------------------------------------------------------------*/
39 #include "use_i4bq921.h"
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/syslog.h>
46 #include <sys/socket.h>
49 #include <net/i4b/include/machine/i4b_debug.h>
51 #include "../include/i4b_global.h"
52 #include "../include/i4b_l1l2.h"
53 #include "../include/i4b_l2l3.h"
54 #include "../include/i4b_mbuf.h"
57 #include "i4b_l2fsm.h"
59 /*---------------------------------------------------------------------------*
60 * handle a received TEI management frame
61 *---------------------------------------------------------------------------*/
63 i4b_tei_rxframe(int unit, struct mbuf *m)
65 l2_softc_t *l2sc = &l2_softc[unit];
66 u_char *ptr = m->m_data;
68 switch(*(ptr + OFF_MT))
71 if( (*(ptr + OFF_RIL) == l2sc->last_ril) &&
72 (*(ptr + OFF_RIH) == l2sc->last_rih))
74 l2sc->tei = GET_TEIFROMAI(*(ptr+OFF_AI));
75 l2sc->tei_valid = TEI_VALID;
77 if(l2sc->T202 == TIMER_ACTIVE)
80 MDL_Status_Ind(l2sc->unit, STI_TEIASG, l2sc->tei);
82 log(LOG_INFO, "i4b: unit %d, assigned TEI = %d = 0x%02x\n", l2sc->unit, l2sc->tei, l2sc->tei);
84 NDBGL2(L2_TEI_MSG, "TEI ID Assign - TEI = %d", l2sc->tei);
86 i4b_next_l2state(l2sc, EV_MDASGRQ);
91 if( (*(ptr + OFF_RIL) == l2sc->last_ril) &&
92 (*(ptr + OFF_RIH) == l2sc->last_rih))
94 l2sc->tei_valid = TEI_INVALID;
95 l2sc->tei = GET_TEIFROMAI(*(ptr+OFF_AI));
97 if(l2sc->tei == GROUP_TEI)
99 log(LOG_WARNING, "i4b: unit %d, denied TEI, no TEI values available from exchange!\n", l2sc->unit);
100 NDBGL2(L2_TEI_ERR, "TEI ID Denied, No TEI values available from exchange!");
104 log(LOG_WARNING, "i4b: unit %d, denied TEI = %d = 0x%02x\n", l2sc->unit, l2sc->tei, l2sc->tei);
105 NDBGL2(L2_TEI_ERR, "TEI ID Denied - TEI = %d", l2sc->tei);
107 MDL_Status_Ind(l2sc->unit, STI_TEIASG, -1);
108 i4b_next_l2state(l2sc, EV_MDERRRS);
113 if( (l2sc->tei_valid == TEI_VALID) &&
114 ( (l2sc->tei == GET_TEIFROMAI(*(ptr+OFF_AI))) ||
115 (GROUP_TEI == GET_TEIFROMAI(*(ptr+OFF_AI))) ))
117 static int lasttei = -1;
119 if(l2sc->tei != lasttei)
121 NDBGL2(L2_TEI_MSG, "TEI ID Check Req - TEI = %d", l2sc->tei);
125 if(l2sc->T202 == TIMER_ACTIVE)
127 i4b_tei_chkresp(l2sc);
132 if( (l2sc->tei_valid == TEI_VALID) &&
133 ( (l2sc->tei == GET_TEIFROMAI(*(ptr+OFF_AI))) ||
134 (l2sc->tei == GET_TEIFROMAI(*(ptr+OFF_AI)))))
136 l2sc->tei_valid = TEI_INVALID;
137 l2sc->tei = GET_TEIFROMAI(*(ptr+OFF_AI));
139 log(LOG_INFO, "i4b: unit %d, removed TEI = %d = 0x%02x\n", l2sc->unit, l2sc->tei, l2sc->tei);
140 NDBGL2(L2_TEI_MSG, "TEI ID Remove - TEI = %d", l2sc->tei);
141 MDL_Status_Ind(l2sc->unit, STI_TEIASG, -1);
142 i4b_next_l2state(l2sc, EV_MDREMRQ);
147 NDBGL2(L2_TEI_ERR, "UNKNOWN TEI MGMT Frame, type = 0x%x", *(ptr + OFF_MT));
148 i4b_print_frame(m->m_len, m->m_data);
154 /*---------------------------------------------------------------------------*
155 * allocate and fill up a TEI management frame for sending
156 *---------------------------------------------------------------------------*/
158 build_tei_mgmt_frame(l2_softc_t *l2sc, unsigned char type)
162 if((m = i4b_Dgetmbuf(TEI_MGMT_FRM_LEN)) == NULL)
165 m->m_data[TEIM_SAPIO] = 0xfc; /* SAPI = 63, CR = 0, EA = 0 */
166 m->m_data[TEIM_TEIO] = 0xff; /* TEI = 127, EA = 1 */
167 m->m_data[TEIM_UIO] = UI; /* UI */
168 m->m_data[TEIM_MEIO] = MEI; /* MEI */
169 m->m_data[TEIM_MTO] = type; /* message type */
174 i4b_make_rand_ri(l2sc);
175 m->m_data[TEIM_RILO] = l2sc->last_ril;
176 m->m_data[TEIM_RIHO] = l2sc->last_rih;
177 m->m_data[TEIM_AIO] = (GROUP_TEI << 1) | 0x01;
181 i4b_make_rand_ri(l2sc);
182 m->m_data[TEIM_RILO] = l2sc->last_ril;
183 m->m_data[TEIM_RIHO] = l2sc->last_rih;
184 m->m_data[TEIM_AIO] = (l2sc->tei << 1) | 0x01;
188 m->m_data[TEIM_RILO] = 0;
189 m->m_data[TEIM_RIHO] = 0;
190 m->m_data[TEIM_AIO] = (l2sc->tei << 1) | 0x01;
195 panic("build_tei_mgmt_frame: invalid type");
202 /*---------------------------------------------------------------------------*
203 * i4b_tei_assign - TEI assignment procedure (Q.921, 5.3.2, pp 24)
204 * T202func and N202 _MUST_ be set prior to calling this function !
205 *---------------------------------------------------------------------------*/
207 i4b_tei_assign(l2_softc_t *l2sc)
211 NDBGL2(L2_TEI_MSG, "tx TEI ID_Request");
213 m = build_tei_mgmt_frame(l2sc, MT_ID_REQEST);
216 panic("i4b_tei_assign: no mbuf");
218 i4b_T202_start(l2sc);
220 PH_Data_Req(l2sc->unit, m, MBUF_FREE);
223 /*---------------------------------------------------------------------------*
224 * i4b_tei_assign - TEI verify procedure (Q.921, 5.3.5, pp 29)
225 * T202func and N202 _MUST_ be set prior to calling this function !
226 *---------------------------------------------------------------------------*/
228 i4b_tei_verify(l2_softc_t *l2sc)
232 NDBGL2(L2_TEI_MSG, "tx TEI ID_Verify");
234 m = build_tei_mgmt_frame(l2sc, MT_ID_VERIFY);
237 panic("i4b_tei_verify: no mbuf");
239 i4b_T202_start(l2sc);
241 PH_Data_Req(l2sc->unit, m, MBUF_FREE);
244 /*---------------------------------------------------------------------------*
245 * i4b_tei_chkresp - TEI check response procedure (Q.921, 5.3.5, pp 29)
246 *---------------------------------------------------------------------------*/
248 i4b_tei_chkresp(l2_softc_t *l2sc)
251 static int lasttei = 0;
253 if(l2sc->tei != lasttei)
256 NDBGL2(L2_TEI_MSG, "tx TEI ID_Check_Response");
259 m = build_tei_mgmt_frame(l2sc, MT_ID_CHK_RSP);
262 panic("i4b_tei_chkresp: no mbuf");
264 PH_Data_Req(l2sc->unit, m, MBUF_FREE);
267 /*---------------------------------------------------------------------------*
268 * generate some 16 bit "random" number used for TEI mgmt Ri field
269 *---------------------------------------------------------------------------*/
271 i4b_make_rand_ri(l2_softc_t *l2sc)
277 read_random((char *)&val, sizeof(val));
279 val = (u_short)krandom();
280 #endif /* RANDOMDEV */
281 l2sc->last_rih = (val >> 8) & 0x00ff;
282 l2sc->last_ril = val & 0x00ff;
285 #endif /* NI4BQ921 > 0 */