2 * Copyright (c) 1997, 2002 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
26 /*---------------------------------------------------------------------------
28 * i4b_tei.c - tei handling procedures
29 * -----------------------------------
30 * last edit-date: [Sat Mar 9 17:53:27 2002]
32 *---------------------------------------------------------------------------*/
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/syslog.h>
41 #include <sys/socket.h>
44 #include <i4b/include/i4b_debug.h>
46 #include <i4b/include/i4b_global.h>
47 #include <i4b/include/i4b_l1l2.h>
48 #include <i4b/include/i4b_l2l3.h>
49 #include <i4b/include/i4b_mbuf.h>
51 #include <i4b/layer2/i4b_l2.h>
52 #include <i4b/layer2/i4b_l2fsm.h>
54 /*---------------------------------------------------------------------------*
55 * handle a received TEI management frame
56 *---------------------------------------------------------------------------*/
58 i4b_tei_rxframe(int unit, struct mbuf *m)
60 l2_softc_t *l2sc = &l2_softc[unit];
61 u_char *ptr = m->m_data;
63 switch(*(ptr + OFF_MT))
66 if( (*(ptr + OFF_RIL) == l2sc->last_ril) &&
67 (*(ptr + OFF_RIH) == l2sc->last_rih))
69 l2sc->tei = GET_TEIFROMAI(*(ptr+OFF_AI));
70 l2sc->tei_valid = TEI_VALID;
72 if(l2sc->T202 == TIMER_ACTIVE)
75 MDL_Status_Ind(l2sc->unit, STI_TEIASG, l2sc->tei);
77 log(LOG_INFO, "i4b: unit %d, assigned TEI = %d = 0x%02x\n", l2sc->unit, l2sc->tei, l2sc->tei);
79 NDBGL2(L2_TEI_MSG, "TEI ID Assign - TEI = %d", l2sc->tei);
81 i4b_next_l2state(l2sc, EV_MDASGRQ);
86 if( (*(ptr + OFF_RIL) == l2sc->last_ril) &&
87 (*(ptr + OFF_RIH) == l2sc->last_rih))
89 l2sc->tei_valid = TEI_INVALID;
90 l2sc->tei = GET_TEIFROMAI(*(ptr+OFF_AI));
92 if(l2sc->tei == GROUP_TEI)
94 log(LOG_WARNING, "i4b: unit %d, denied TEI, no TEI values available from exchange!\n", l2sc->unit);
95 NDBGL2(L2_TEI_ERR, "TEI ID Denied, No TEI values available from exchange!");
99 log(LOG_WARNING, "i4b: unit %d, denied TEI = %d = 0x%02x\n", l2sc->unit, l2sc->tei, l2sc->tei);
100 NDBGL2(L2_TEI_ERR, "TEI ID Denied - TEI = %d", l2sc->tei);
102 MDL_Status_Ind(l2sc->unit, STI_TEIASG, -1);
103 i4b_next_l2state(l2sc, EV_MDERRRS);
108 if( (l2sc->tei_valid == TEI_VALID) &&
109 ( (l2sc->tei == GET_TEIFROMAI(*(ptr+OFF_AI))) ||
110 (GROUP_TEI == GET_TEIFROMAI(*(ptr+OFF_AI))) ))
112 static int lasttei = -1;
114 if(l2sc->tei != lasttei)
116 NDBGL2(L2_TEI_MSG, "TEI ID Check Req - TEI = %d", l2sc->tei);
120 if(l2sc->T202 == TIMER_ACTIVE)
122 i4b_tei_chkresp(l2sc);
127 if( (l2sc->tei_valid == TEI_VALID) &&
128 ( (l2sc->tei == GET_TEIFROMAI(*(ptr+OFF_AI))) ||
129 (l2sc->tei == GET_TEIFROMAI(*(ptr+OFF_AI)))))
131 l2sc->tei_valid = TEI_INVALID;
132 l2sc->tei = GET_TEIFROMAI(*(ptr+OFF_AI));
134 log(LOG_INFO, "i4b: unit %d, removed TEI = %d = 0x%02x\n", l2sc->unit, l2sc->tei, l2sc->tei);
135 NDBGL2(L2_TEI_MSG, "TEI ID Remove - TEI = %d", l2sc->tei);
136 MDL_Status_Ind(l2sc->unit, STI_TEIASG, -1);
137 i4b_next_l2state(l2sc, EV_MDREMRQ);
142 NDBGL2(L2_TEI_ERR, "UNKNOWN TEI MGMT Frame, type = 0x%x", *(ptr + OFF_MT));
143 i4b_print_frame(m->m_len, m->m_data);
149 /*---------------------------------------------------------------------------*
150 * allocate and fill up a TEI management frame for sending
151 *---------------------------------------------------------------------------*/
153 build_tei_mgmt_frame(l2_softc_t *l2sc, unsigned char type)
157 if((m = i4b_Dgetmbuf(TEI_MGMT_FRM_LEN)) == NULL)
160 m->m_data[TEIM_SAPIO] = 0xfc; /* SAPI = 63, CR = 0, EA = 0 */
161 m->m_data[TEIM_TEIO] = 0xff; /* TEI = 127, EA = 1 */
162 m->m_data[TEIM_UIO] = UI; /* UI */
163 m->m_data[TEIM_MEIO] = MEI; /* MEI */
164 m->m_data[TEIM_MTO] = type; /* message type */
169 i4b_make_rand_ri(l2sc);
170 m->m_data[TEIM_RILO] = l2sc->last_ril;
171 m->m_data[TEIM_RIHO] = l2sc->last_rih;
172 m->m_data[TEIM_AIO] = (GROUP_TEI << 1) | 0x01;
176 i4b_make_rand_ri(l2sc);
177 m->m_data[TEIM_RILO] = l2sc->last_ril;
178 m->m_data[TEIM_RIHO] = l2sc->last_rih;
179 m->m_data[TEIM_AIO] = (l2sc->tei << 1) | 0x01;
183 m->m_data[TEIM_RILO] = 0;
184 m->m_data[TEIM_RIHO] = 0;
185 m->m_data[TEIM_AIO] = (l2sc->tei << 1) | 0x01;
190 panic("build_tei_mgmt_frame: invalid type");
197 /*---------------------------------------------------------------------------*
198 * i4b_tei_assign - TEI assignment procedure (Q.921, 5.3.2, pp 24)
199 * T202func and N202 _MUST_ be set prior to calling this function !
200 *---------------------------------------------------------------------------*/
202 i4b_tei_assign(l2_softc_t *l2sc)
206 NDBGL2(L2_TEI_MSG, "tx TEI ID_Request");
208 m = build_tei_mgmt_frame(l2sc, MT_ID_REQEST);
211 panic("i4b_tei_assign: no mbuf");
213 i4b_T202_start(l2sc);
215 PH_Data_Req(l2sc->unit, m, MBUF_FREE);
218 /*---------------------------------------------------------------------------*
219 * i4b_tei_assign - TEI verify procedure (Q.921, 5.3.5, pp 29)
220 * T202func and N202 _MUST_ be set prior to calling this function !
221 *---------------------------------------------------------------------------*/
223 i4b_tei_verify(l2_softc_t *l2sc)
227 NDBGL2(L2_TEI_MSG, "tx TEI ID_Verify");
229 m = build_tei_mgmt_frame(l2sc, MT_ID_VERIFY);
232 panic("i4b_tei_verify: no mbuf");
234 i4b_T202_start(l2sc);
236 PH_Data_Req(l2sc->unit, m, MBUF_FREE);
239 /*---------------------------------------------------------------------------*
240 * i4b_tei_chkresp - TEI check response procedure (Q.921, 5.3.5, pp 29)
241 *---------------------------------------------------------------------------*/
243 i4b_tei_chkresp(l2_softc_t *l2sc)
246 static int lasttei = 0;
248 if(l2sc->tei != lasttei)
251 NDBGL2(L2_TEI_MSG, "tx TEI ID_Check_Response");
254 m = build_tei_mgmt_frame(l2sc, MT_ID_CHK_RSP);
257 panic("i4b_tei_chkresp: no mbuf");
259 PH_Data_Req(l2sc->unit, m, MBUF_FREE);
262 /*---------------------------------------------------------------------------*
263 * generate some 16 bit "random" number used for TEI mgmt Ri field
264 *---------------------------------------------------------------------------*/
266 i4b_make_rand_ri(l2_softc_t *l2sc)
271 read_random((char *)&val, sizeof(val));
273 val = (u_short)random();
274 #endif /* RANDOMDEV */
276 l2sc->last_rih = (val >> 8) & 0x00ff;
277 l2sc->last_ril = val & 0x00ff;