/* * Copyright (c) 1997, 2000 Hellmuth Michaelis. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * *--------------------------------------------------------------------------- * * i4b_q931.c - Q931 received messages handling * -------------------------------------------- * * $Id: i4b_q931.c,v 1.17 2005/06/01 18:07:04 drochner Exp $ * * $FreeBSD$ * * last edit-date: [Fri Jan 5 11:33:47 2001] * *---------------------------------------------------------------------------*/ #include __KERNEL_RCSID(0, "$NetBSD: i4b_q931.c,v 1.17 2005/06/01 18:07:04 drochner Exp $"); #ifdef __FreeBSD__ #include "i4bq931.h" #else #define NI4BQ931 1 #endif #if NI4BQ931 > 0 #include #include #include #include #include #include #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000 #include #endif #ifdef __FreeBSD__ #include #include #include #else #include #include #include #endif #include #include #include #include #include #include #include #include #include unsigned int i4b_l3_debug = L3_DEBUG_DEFAULT; /* protocol independent causes -> Q.931 causes */ unsigned char cause_tab_q931[CAUSE_I4B_MAX] = { CAUSE_Q850_NCCLR, /* CAUSE_I4B_NORMAL -> normal call clearing */ CAUSE_Q850_USRBSY, /* CAUSE_I4B_BUSY -> user busy */ CAUSE_Q850_NOCAVAIL, /* CAUSE_I4B_NOCHAN -> no circuit/channel available*/ CAUSE_Q850_INCDEST, /* CAUSE_I4B_INCOMP -> incompatible destination */ CAUSE_Q850_CALLREJ, /* CAUSE_I4B_REJECT -> call rejected */ CAUSE_Q850_DSTOOORDR, /* CAUSE_I4B_OOO -> destination out of order */ CAUSE_Q850_TMPFAIL, /* CAUSE_I4B_TMPFAIL -> temporary failure */ CAUSE_Q850_USRBSY, /* CAUSE_I4B_L1ERROR -> L1 error / persistent deact XXX */ CAUSE_Q850_USRBSY, /* CAUSE_I4B_LLDIAL -> no dialout on leased line XXX */ }; /*---------------------------------------------------------------------------* * setup cr ref flag according to direction *---------------------------------------------------------------------------*/ unsigned char setup_cr(call_desc_t *cd, unsigned char cr) { if(cd->crflag == CRF_ORIG) return(cr & 0x7f); /* clear cr ref flag */ else if(cd->crflag == CRF_DEST) return(cr | 0x80); /* set cr ref flag */ else panic("setup_cr: invalid crflag!"); } /*---------------------------------------------------------------------------* * decode and process a Q.931 message *---------------------------------------------------------------------------*/ void i4b_decode_q931(int isdnif, int msg_len, u_char *msg_ptr) { call_desc_t *cd = NULL; int codeset = CODESET_0; int old_codeset = CODESET_0; int shift_flag = UNSHIFTED; int crlen = 0; int crval = 0; int crflag = 0; int i; int offset; int s; /* check protocol discriminator */ if(*msg_ptr != PD_Q931) { static int protoflag = -1; /* print only once .. */ if(*msg_ptr != protoflag) { NDBGL3(L3_P_MSG, "unknown protocol discriminator 0x%x!", *msg_ptr); protoflag = *msg_ptr; } return; } msg_ptr++; msg_len--; s = splnet(); /* this has to be protected ! */ /* extract call reference */ crlen = *msg_ptr & CRLENGTH_MASK; msg_ptr++; msg_len--; if (crlen != 0) { crval += *msg_ptr & 0x7f; crflag = (*msg_ptr >> 7) & 0x01; msg_ptr++; msg_len--; for(i=1; i < crlen; i++) { crval += *msg_ptr; msg_ptr++; msg_len--; } } else { crval = 0; crflag = 0; } NDBGL3(L3_P_MSG, "Call Ref, len %d, val %d, flag %d", crlen, crval, crflag); /* find or allocate calldescriptor */ if((cd = cd_by_isdnifcr(isdnif, crval, crflag == CRF_DEST ? CRF_ORIG : CRF_DEST)) == NULL) { if(*msg_ptr == SETUP) { struct isdn_l3_driver *drv; drv = isdn_find_l3_by_isdnif(isdnif); /* get and init new calldescriptor */ cd = reserve_cd(); /* cdid filled in */ cd->isdnif = isdnif; cd->l3drv = drv; cd->cr = crval; cd->crflag = CRF_DEST; /* we are the dest side */ cd->l4_driver = NULL; /* reset link tab ptrs */ cd->l4_driver_softc = NULL; } else { /*XXX*/ if(crval != 0) /* ignore global call references */ { NDBGL3(L3_P_ERR, "cannot find calldescriptor for cr = 0x%x, crflag = 0x%x, msg = 0x%x, frame = ", crval, crflag, *msg_ptr); i4b_print_frame(msg_len, msg_ptr); } splx(s); return; } } splx(s); /* decode and handle message type */ i4b_decode_q931_message(cd, *msg_ptr); msg_ptr++; msg_len--; /* process information elements */ while(msg_len > 0) { /* check for shift codeset IE */ if((*msg_ptr & 0x80) && ((*msg_ptr & 0xf0) == SOIE_SHIFT)) { if(!(*msg_ptr & SHIFT_LOCK)) shift_flag = SHIFTED; old_codeset = codeset; codeset = *msg_ptr & CODESET_MASK; if((shift_flag != SHIFTED) && (codeset <= old_codeset)) { NDBGL3(L3_P_ERR, "Q.931 lockingshift proc violation, shift %d -> %d", old_codeset, codeset); codeset = old_codeset; } msg_len--; msg_ptr++; } /* process one IE for selected codeset */ switch(codeset) { case CODESET_0: offset = i4b_decode_q931_cs0_ie(cd, msg_len, msg_ptr); msg_len -= offset; msg_ptr += offset; break; default: NDBGL3(L3_P_ERR, "unknown codeset %d, ", codeset); i4b_print_frame(msg_len, msg_ptr); msg_len = 0; break; } /* check for non-locking shifts */ if(shift_flag == SHIFTED) { shift_flag = UNSHIFTED; codeset = old_codeset; } } next_l3state(cd, cd->event); } /*---------------------------------------------------------------------------* * decode and process one Q.931 codeset 0 information element *---------------------------------------------------------------------------*/ int i4b_decode_q931_cs0_ie(call_desc_t *cd, int msg_len, u_char *msg_ptr) { int i, j; char *p; switch(*msg_ptr) { /*********/ /* Q.931 */ /*********/ /* single byte IE's */ case IEI_SENDCOMPL: NDBGL3(L3_P_MSG, "IEI_SENDCOMPL"); return(1); break; /* multi byte IE's */ case IEI_SEGMMSG: /* segmented message */ NDBGL3(L3_P_MSG, "IEI_SEGMENTED_MESSAGE"); break; case IEI_BEARERCAP: /* bearer capability */ switch(msg_ptr[2]) { case 0x80: /* speech */ case 0x89: /* restricted digital info */ case 0x90: /* 3.1KHz audio */ /* XXX */ cd->bprot = BPROT_NONE; NDBGL3(L3_P_MSG, "IEI_BEARERCAP - Telephony"); break; case 0x88: /* unrestricted digital info */ /* XXX */ cd->bprot = BPROT_RHDLC; NDBGL3(L3_P_MSG, "IEI_BEARERCAP - Raw HDLC"); break; default: /* XXX */ cd->bprot = BPROT_NONE; NDBGL3(L3_P_ERR, "IEI_BEARERCAP - Unsupported B-Protocol 0x%x", msg_ptr[2]); break; } break; case IEI_CAUSE: /* cause */ if(msg_ptr[2] & 0x80) { cd->cause_in = msg_ptr[3] & 0x7f; NDBGL3(L3_P_MSG, "IEI_CAUSE = %d", msg_ptr[3] & 0x7f); } else { cd->cause_in = msg_ptr[4] & 0x7f; NDBGL3(L3_P_MSG, "IEI_CAUSE = %d", msg_ptr[4] & 0x7f); } break; case IEI_CALLID: /* call identity */ NDBGL3(L3_P_MSG, "IEI_CALL_IDENTITY"); break; case IEI_CALLSTATE: /* call state */ cd->call_state = msg_ptr[2] & 0x3f; NDBGL3(L3_P_MSG, "IEI_CALLSTATE = %d", cd->call_state); break; case IEI_CHANNELID: /* channel id */ if((msg_ptr[2] & 0xf4) != 0x80) { cd->channelid = CHAN_NO; NDBGL3(L3_P_ERR, "IEI_CHANNELID, unsupported value 0x%x", msg_ptr[2]); } else { int old_chanid = cd->channelid; switch(msg_ptr[2] & 0x03) { case IE_CHAN_ID_NO: cd->channelid = CHAN_NO; break; case IE_CHAN_ID_B1: cd->channelid = CHAN_B1; break; case IE_CHAN_ID_B2: cd->channelid = CHAN_B2; break; case IE_CHAN_ID_ANY: cd->channelid = CHAN_ANY; break; } cd->channelexcl = (msg_ptr[2] & 0x08) >> 3; NDBGL3(L3_P_MSG, "IEI_CHANNELID - channel %d, exclusive = %d", cd->channelid, cd->channelexcl); /* if this is the first time we know the real channel, * reserve it */ if (old_chanid != cd->channelid) { if((cd->channelid == CHAN_B1) || (cd->channelid == CHAN_B2)) { struct isdn_l3_driver *d = cd->l3drv; if (i4b_l2_channel_get_state(d, cd->channelid) == BCH_ST_FREE) { if (d != NULL) { d->bch_state[cd->channelid] = BCH_ST_RSVD; update_controller_leds(d); } i4b_l2_channel_set_state(d, cd->channelid, BCH_ST_RSVD); } else NDBGL3(L3_P_ERR, "IE ChannelID, Channel NOT free!!"); } else if(cd->channelid == CHAN_NO) { NDBGL3(L3_P_MSG, "IE ChannelID, SETUP with channel = No channel (CW)"); } else /* cd->channelid == CHAN_ANY */ { NDBGL3(L3_P_ERR, "ERROR: IE ChannelID, SETUP with channel = Any channel!"); } } } break; case IEI_PROGRESSI: /* progress indicator */ NDBGL3(L3_P_MSG, "IEI_PROGRESSINDICATOR"); break; case IEI_NETSPCFAC: /* network specific fac */ NDBGL3(L3_P_MSG, "IEI_NETSPCFAC"); break; case IEI_NOTIFIND: /* notification indicator */ NDBGL3(L3_P_MSG, "IEI_NOTIFICATION_INDICATOR"); break; case IEI_DISPLAY: /* display */ memcpy(cd->display, &msg_ptr[2], min(DISPLAY_MAX, msg_ptr[1])); cd->display[min(DISPLAY_MAX, msg_ptr[1])] = '\0'; NDBGL3(L3_P_MSG, "IEI_DISPLAY = %s", cd->display); break; case IEI_DATETIME: /* date/time */ i = 2; j = msg_ptr[1]; p = &(cd->datetime[0]); *p = '\0'; for(j = msg_ptr[1]; j > 0; j--, i++) sprintf(p+strlen(p), "%02d", msg_ptr[i]); NDBGL3(L3_P_MSG, "IEI_DATETIME = %s", cd->datetime); break; case IEI_KEYPAD: /* keypad facility */ NDBGL3(L3_P_MSG, "IEI_KEYPAD_FACILITY"); break; case IEI_SIGNAL: /* signal type */ NDBGL3(L3_P_MSG, "IEI_SIGNAL = %d", msg_ptr[2]); break; case IEI_INFRATE: /* information rate */ NDBGL3(L3_P_MSG, "IEI_INFORMATION_RATE"); break; case IEI_ETETDEL: /* end to end transit delay */ NDBGL3(L3_P_MSG, "IEI_END_TO_END_TRANSIT_DELAY"); break; case IEI_CUG: /* closed user group */ NDBGL3(L3_P_MSG, "IEI_CLOSED_USER_GROUP"); break; case IEI_CALLINGPN: /* calling party no */ cd->type_plan = msg_ptr[2] & 0x7f; if(msg_ptr[2] & 0x80) /* no presentation/screening indicator ? */ { memcpy(cd->src_telno, &msg_ptr[3], min(TELNO_MAX, msg_ptr[1]-1)); cd->src_telno[min(TELNO_MAX, msg_ptr[1] - 1)] = '\0'; cd->scr_ind = SCR_NONE; cd->prs_ind = PRS_NONE; } else { memcpy(cd->src_telno, &msg_ptr[4], min(TELNO_MAX, msg_ptr[1]-2)); cd->src_telno[min(TELNO_MAX, msg_ptr[1] - 2)] = '\0'; cd->scr_ind = (msg_ptr[3] & 0x03) + SCR_USR_NOSC; cd->prs_ind = ((msg_ptr[3] >> 5) & 0x03) + PRS_ALLOWED; } NDBGL3(L3_P_MSG, "IEI_CALLINGPN = %s", cd->src_telno); break; case IEI_CALLINGPS: /* calling party subaddress */ NDBGL3(L3_P_MSG, "IEI_CALLINGPS"); memcpy(cd->src_subaddr, &msg_ptr[1], min(SUBADDR_MAX, msg_ptr[1]-1)); break; case IEI_CALLEDPN: /* called party number */ memcpy(cd->dst_telno, &msg_ptr[3], min(TELNO_MAX, msg_ptr[1]-1)); cd->dst_telno[min(TELNO_MAX, msg_ptr [1] - 1)] = '\0'; NDBGL3(L3_P_MSG, "IEI_CALLED = %s", cd->dst_telno); break; case IEI_CALLEDPS: /* called party subaddress */ NDBGL3(L3_P_MSG, "IEI_CALLEDPS"); memcpy(cd->dest_subaddr, &msg_ptr[1], min(SUBADDR_MAX, msg_ptr[1]-1)); break; case IEI_REDIRNO: /* redirecting number */ NDBGL3(L3_P_MSG, "IEI_REDIRECTING_NUMBER"); break; case IEI_TRNSEL: /* transit network selection */ NDBGL3(L3_P_MSG, "IEI_TRANSIT_NETWORK_SELECTION"); break; case IEI_RESTARTI: /* restart indicator */ NDBGL3(L3_P_MSG, "IEI_RESTART_INDICATOR"); break; case IEI_LLCOMPAT: /* low layer compat */ NDBGL3(L3_P_MSG, "IEI_LLCOMPAT"); break; case IEI_HLCOMPAT: /* high layer compat */ NDBGL3(L3_P_MSG, "IEI_HLCOMPAT"); break; case IEI_USERUSER: /* user-user */ NDBGL3(L3_P_MSG, "IEI_USER_USER"); break; case IEI_ESCAPE: /* escape for extension */ NDBGL3(L3_P_MSG, "IEI_ESCAPE"); break; /*********/ /* Q.932 */ /*********/ case IEI_FACILITY: /* facility */ NDBGL3(L3_P_MSG, "IEI_FACILITY"); if(i4b_aoc(msg_ptr, cd) > -1) i4b_l4_charging_ind(cd); break; /*********/ /* Q.95x */ /*********/ case IEI_CONCTDNO: /* connected number */ NDBGL3(L3_P_MSG, "IEI_CONCTDNO"); break; default: NDBGL3(L3_P_ERR, "Unknown IE %d - ", *msg_ptr); i4b_print_frame(msg_ptr[1]+2, msg_ptr); break; } return(msg_ptr[1] + 2); } /*---------------------------------------------------------------------------* * decode and process one Q.931 codeset 0 information element *---------------------------------------------------------------------------*/ void i4b_decode_q931_message(call_desc_t *cd, u_char message_type) { const char *m = NULL; cd->event = EV_ILL; switch(message_type) { /* call establishment */ case ALERT: cd->event = EV_ALERT; m = "ALERT"; break; case CALL_PROCEEDING: cd->event = EV_CALLPRC; m = "CALL_PROCEEDING"; break; case PROGRESS: cd->event = EV_PROGIND; m = "PROGRESS"; break; case SETUP: m = "SETUP"; cd->bprot = BPROT_NONE; cd->cause_in = 0; cd->cause_out = 0; cd->dst_telno[0] = '\0'; cd->src_telno[0] = '\0'; cd->channelid = CHAN_NO; cd->channelexcl = 0; cd->display[0] = '\0'; cd->datetime[0] = '\0'; cd->event = EV_SETUP; break; case CONNECT: m = "CONNECT"; cd->datetime[0] = '\0'; cd->event = EV_CONNECT; break; case SETUP_ACKNOWLEDGE: m = "SETUP_ACKNOWLEDGE"; cd->event = EV_SETUPAK; break; case CONNECT_ACKNOWLEDGE: m = "CONNECT_ACKNOWLEDGE"; cd->event = EV_CONACK; break; /* call information */ case USER_INFORMATION: m = "USER_INFORMATION"; break; case SUSPEND_REJECT: m = "SUSPEND_REJECT"; break; case RESUME_REJECT: m = "RESUME_REJECT"; break; case HOLD: m = "HOLD"; break; case SUSPEND: m = "SUSPEND"; break; case RESUME: m = "RESUME"; break; case HOLD_ACKNOWLEDGE: m = "HOLD_ACKNOWLEDGE"; break; case SUSPEND_ACKNOWLEDGE: m = "SUSPEND_ACKNOWLEDGE"; break; case RESUME_ACKNOWLEDGE: m = "RESUME_ACKNOWLEDGE"; break; case HOLD_REJECT: m = "HOLD_REJECT"; break; case RETRIEVE: m = "RETRIEVE"; break; case RETRIEVE_ACKNOWLEDGE: m = "RETRIEVE_ACKNOWLEDGE"; break; case RETRIEVE_REJECT: m = "RETRIEVE_REJECT"; break; /* call clearing */ case DISCONNECT: m = "DISCONNECT"; cd->event = EV_DISCONN; break; case RESTART: m = "RESTART"; break; case RELEASE: m = "RELEASE"; cd->event = EV_RELEASE; break; case RESTART_ACKNOWLEDGE: m = "RESTART_ACKNOWLEDGE"; break; case RELEASE_COMPLETE: m = "RELEASE_COMPLETE"; cd->event = EV_RELCOMP; break; /* misc messages */ case SEGMENT: m = "SEGMENT"; break; case FACILITY: m = "FACILITY"; cd->event = EV_FACILITY; break; case REGISTER: m = "REGISTER"; break; case NOTIFY: m = "NOTIFY"; break; case STATUS_ENQUIRY: m = "STATUS_ENQUIRY"; cd->event = EV_STATENQ; break; case CONGESTION_CONTROL: m = "CONGESTION_CONTROL"; break; case INFORMATION: m = "INFORMATION"; cd->event = EV_INFO; break; case STATUS: m = "STATUS"; cd->event = EV_STATUS; break; default: NDBGL3(L3_P_ERR, "isdnif %d, cr = 0x%02x, msg = 0x%02x", cd->isdnif, cd->cr, message_type); break; } if(m) { NDBGL3(L3_PRIM, "%s: isdnif %d, cr = 0x%02x\n", m, cd->isdnif, cd->cr); } } #endif /* NI4BQ931 > 0 */