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7092459702
libpri/q931.c
Sean Bright 7092459702 Capture and expose the Reverse Charging Indication IE on ISDN PRI. 
(issue #13760)
Reported by: mrgabu
Patches:
      20090619_libpri_1.4.patch uploaded by seanbright (license 71)
Tested by: seanbright, pruonckk

Review: https://reviewboard.asterisk.org/r/291/


git-svn-id: https://origsvn.digium.com/svn/libpri/branches/1.4@885 2fbb986a-6c06-0410-b554-c9c1f0a7f128
2009-06-24 18:19:24 +00:00

4287 lines
137 KiB
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/*
* libpri: An implementation of Primary Rate ISDN
*
* Written by Mark Spencer <markster@digium.com>
*
* Copyright (C) 2001-2005, Digium, Inc.
* All Rights Reserved.
*/
/*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2 as published by the
* Free Software Foundation. See the LICENSE file included with
* this program for more details.
*
* In addition, when this program is distributed with Asterisk in
* any form that would qualify as a 'combined work' or as a
* 'derivative work' (but not mere aggregation), you can redistribute
* and/or modify the combination under the terms of the license
* provided with that copy of Asterisk, instead of the license
* terms granted here.
*/
#include "compat.h"
#include "libpri.h"
#include "pri_internal.h"
#include "pri_q921.h"
#include "pri_q931.h"
#include "pri_facility.h"
#include "rose.h"
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <limits.h>
#define MAX_MAND_IES 10
struct msgtype {
int msgnum;
char *name;
int mandies[MAX_MAND_IES];
};
static struct msgtype msgs[] = {
/* Call establishment messages */
{ Q931_ALERTING, "ALERTING" },
{ Q931_CALL_PROCEEDING, "CALL PROCEEDING" },
{ Q931_CONNECT, "CONNECT" },
{ Q931_CONNECT_ACKNOWLEDGE, "CONNECT ACKNOWLEDGE" },
{ Q931_PROGRESS, "PROGRESS", { Q931_PROGRESS_INDICATOR } },
{ Q931_SETUP, "SETUP", { Q931_BEARER_CAPABILITY, Q931_CHANNEL_IDENT } },
{ Q931_SETUP_ACKNOWLEDGE, "SETUP ACKNOWLEDGE" },
/* Call disestablishment messages */
{ Q931_DISCONNECT, "DISCONNECT", { Q931_CAUSE } },
{ Q931_RELEASE, "RELEASE" },
{ Q931_RELEASE_COMPLETE, "RELEASE COMPLETE" },
{ Q931_RESTART, "RESTART", { Q931_RESTART_INDICATOR } },
{ Q931_RESTART_ACKNOWLEDGE, "RESTART ACKNOWLEDGE", { Q931_RESTART_INDICATOR } },
/* Miscellaneous */
{ Q931_STATUS, "STATUS", { Q931_CAUSE, Q931_CALL_STATE } },
{ Q931_STATUS_ENQUIRY, "STATUS ENQUIRY" },
{ Q931_USER_INFORMATION, "USER_INFORMATION" },
{ Q931_SEGMENT, "SEGMENT" },
{ Q931_CONGESTION_CONTROL, "CONGESTION CONTROL" },
{ Q931_INFORMATION, "INFORMATION" },
{ Q931_FACILITY, "FACILITY" },
{ Q931_NOTIFY, "NOTIFY", { Q931_IE_NOTIFY_IND } },
/* Call Management */
{ Q931_HOLD, "HOLD" },
{ Q931_HOLD_ACKNOWLEDGE, "HOLD ACKNOWLEDGE" },
{ Q931_HOLD_REJECT, "HOLD REJECT" },
{ Q931_RETRIEVE, "RETRIEVE" },
{ Q931_RETRIEVE_ACKNOWLEDGE, "RETRIEVE ACKNOWLEDGE" },
{ Q931_RETRIEVE_REJECT, "RETRIEVE REJECT" },
{ Q931_RESUME, "RESUME" },
{ Q931_RESUME_ACKNOWLEDGE, "RESUME ACKNOWLEDGE", { Q931_CHANNEL_IDENT } },
{ Q931_RESUME_REJECT, "RESUME REJECT", { Q931_CAUSE } },
{ Q931_SUSPEND, "SUSPEND" },
{ Q931_SUSPEND_ACKNOWLEDGE, "SUSPEND ACKNOWLEDGE" },
{ Q931_SUSPEND_REJECT, "SUSPEND REJECT" },
};
static int post_handle_q931_message(struct pri *ctrl, struct q931_mh *mh, struct q931_call *c, int missingmand);
struct msgtype maintenance_msgs[] = {
{ NATIONAL_SERVICE, "SERVICE", { Q931_CHANNEL_IDENT } },
{ NATIONAL_SERVICE_ACKNOWLEDGE, "SERVICE ACKNOWLEDGE", { Q931_CHANNEL_IDENT } },
};
static int post_handle_maintenance_message(struct pri *ctrl, struct q931_mh *mh, struct q931_call *c);
static struct msgtype causes[] = {
{ PRI_CAUSE_UNALLOCATED, "Unallocated (unassigned) number" },
{ PRI_CAUSE_NO_ROUTE_TRANSIT_NET, "No route to specified transmit network" },
{ PRI_CAUSE_NO_ROUTE_DESTINATION, "No route to destination" },
{ PRI_CAUSE_CHANNEL_UNACCEPTABLE, "Channel unacceptable" },
{ PRI_CAUSE_CALL_AWARDED_DELIVERED, "Call awarded and being delivered in an established channel" },
{ PRI_CAUSE_NORMAL_CLEARING, "Normal Clearing" },
{ PRI_CAUSE_USER_BUSY, "User busy" },
{ PRI_CAUSE_NO_USER_RESPONSE, "No user responding" },
{ PRI_CAUSE_NO_ANSWER, "User alerting, no answer" },
{ PRI_CAUSE_CALL_REJECTED, "Call Rejected" },
{ PRI_CAUSE_NUMBER_CHANGED, "Number changed" },
{ PRI_CAUSE_DESTINATION_OUT_OF_ORDER, "Destination out of order" },
{ PRI_CAUSE_INVALID_NUMBER_FORMAT, "Invalid number format" },
{ PRI_CAUSE_FACILITY_REJECTED, "Facility rejected" },
{ PRI_CAUSE_RESPONSE_TO_STATUS_ENQUIRY, "Response to STATus ENQuiry" },
{ PRI_CAUSE_NORMAL_UNSPECIFIED, "Normal, unspecified" },
{ PRI_CAUSE_NORMAL_CIRCUIT_CONGESTION, "Circuit/channel congestion" },
{ PRI_CAUSE_NETWORK_OUT_OF_ORDER, "Network out of order" },
{ PRI_CAUSE_NORMAL_TEMPORARY_FAILURE, "Temporary failure" },
{ PRI_CAUSE_SWITCH_CONGESTION, "Switching equipment congestion" },
{ PRI_CAUSE_ACCESS_INFO_DISCARDED, "Access information discarded" },
{ PRI_CAUSE_REQUESTED_CHAN_UNAVAIL, "Requested channel not available" },
{ PRI_CAUSE_PRE_EMPTED, "Pre-empted" },
{ PRI_CAUSE_FACILITY_NOT_SUBSCRIBED, "Facility not subscribed" },
{ PRI_CAUSE_OUTGOING_CALL_BARRED, "Outgoing call barred" },
{ PRI_CAUSE_INCOMING_CALL_BARRED, "Incoming call barred" },
{ PRI_CAUSE_BEARERCAPABILITY_NOTAUTH, "Bearer capability not authorized" },
{ PRI_CAUSE_BEARERCAPABILITY_NOTAVAIL, "Bearer capability not available" },
{ PRI_CAUSE_BEARERCAPABILITY_NOTIMPL, "Bearer capability not implemented" },
{ PRI_CAUSE_SERVICEOROPTION_NOTAVAIL, "Service or option not available, unspecified" },
{ PRI_CAUSE_CHAN_NOT_IMPLEMENTED, "Channel not implemented" },
{ PRI_CAUSE_FACILITY_NOT_IMPLEMENTED, "Facility not implemented" },
{ PRI_CAUSE_INVALID_CALL_REFERENCE, "Invalid call reference value" },
{ PRI_CAUSE_IDENTIFIED_CHANNEL_NOTEXIST, "Identified channel does not exist" },
{ PRI_CAUSE_INCOMPATIBLE_DESTINATION, "Incompatible destination" },
{ PRI_CAUSE_INVALID_MSG_UNSPECIFIED, "Invalid message unspecified" },
{ PRI_CAUSE_MANDATORY_IE_MISSING, "Mandatory information element is missing" },
{ PRI_CAUSE_MESSAGE_TYPE_NONEXIST, "Message type nonexist." },
{ PRI_CAUSE_WRONG_MESSAGE, "Wrong message" },
{ PRI_CAUSE_IE_NONEXIST, "Info. element nonexist or not implemented" },
{ PRI_CAUSE_INVALID_IE_CONTENTS, "Invalid information element contents" },
{ PRI_CAUSE_WRONG_CALL_STATE, "Message not compatible with call state" },
{ PRI_CAUSE_RECOVERY_ON_TIMER_EXPIRE, "Recover on timer expiry" },
{ PRI_CAUSE_MANDATORY_IE_LENGTH_ERROR, "Mandatory IE length error" },
{ PRI_CAUSE_PROTOCOL_ERROR, "Protocol error, unspecified" },
{ PRI_CAUSE_INTERWORKING, "Interworking, unspecified" },
};
static struct msgtype facilities[] = {
{ PRI_NSF_SID_PREFERRED, "CPN (SID) preferred" },
{ PRI_NSF_ANI_PREFERRED, "BN (ANI) preferred" },
{ PRI_NSF_SID_ONLY, "CPN (SID) only" },
{ PRI_NSF_ANI_ONLY, "BN (ANI) only" },
{ PRI_NSF_CALL_ASSOC_TSC, "Call Associated TSC" },
{ PRI_NSF_NOTIF_CATSC_CLEARING, "Notification of CATSC Clearing or Resource Unavailable" },
{ PRI_NSF_OPERATOR, "Operator" },
{ PRI_NSF_PCCO, "Pre-subscribed Common Carrier Operator (PCCO)" },
{ PRI_NSF_SDN, "SDN (including GSDN)" },
{ PRI_NSF_TOLL_FREE_MEGACOM, "Toll Free MEGACOM" },
{ PRI_NSF_MEGACOM, "MEGACOM" },
{ PRI_NSF_ACCUNET, "ACCUNET Switched Digital Service" },
{ PRI_NSF_LONG_DISTANCE_SERVICE, "Long Distance Service" },
{ PRI_NSF_INTERNATIONAL_TOLL_FREE, "International Toll Free Service" },
{ PRI_NSF_ATT_MULTIQUEST, "AT&T MultiQuest" },
{ PRI_NSF_CALL_REDIRECTION_SERVICE, "Call Redirection Service" }
};
#define FLAG_PREFERRED 2
#define FLAG_EXCLUSIVE 4
#define RESET_INDICATOR_CHANNEL 0
#define RESET_INDICATOR_DS1 6
#define RESET_INDICATOR_PRI 7
#define TRANS_MODE_64_CIRCUIT 0x10
#define TRANS_MODE_2x64_CIRCUIT 0x11
#define TRANS_MODE_384_CIRCUIT 0x13
#define TRANS_MODE_1536_CIRCUIT 0x15
#define TRANS_MODE_1920_CIRCUIT 0x17
#define TRANS_MODE_MULTIRATE 0x18
#define TRANS_MODE_PACKET 0x40
#define RATE_ADAPT_56K 0x0f
#define LAYER_2_LAPB 0x46
#define LAYER_3_X25 0x66
/* The 4ESS uses a different audio field */
#define PRI_TRANS_CAP_AUDIO_4ESS 0x08
/* Don't forget to update PRI_PROG_xxx at libpri.h */
#define Q931_PROG_CALL_NOT_E2E_ISDN 0x01
#define Q931_PROG_CALLED_NOT_ISDN 0x02
#define Q931_PROG_CALLER_NOT_ISDN 0x03
#define Q931_PROG_CALLER_RETURNED_TO_ISDN 0x04
#define Q931_PROG_INBAND_AVAILABLE 0x08
#define Q931_PROG_DELAY_AT_INTERF 0x0a
#define Q931_PROG_INTERWORKING_WITH_PUBLIC 0x10
#define Q931_PROG_INTERWORKING_NO_RELEASE 0x11
#define Q931_PROG_INTERWORKING_NO_RELEASE_PRE_ANSWER 0x12
#define Q931_PROG_INTERWORKING_NO_RELEASE_POST_ANSWER 0x13
#define CODE_CCITT 0x0
#define CODE_INTERNATIONAL 0x1
#define CODE_NATIONAL 0x2
#define CODE_NETWORK_SPECIFIC 0x3
#define LOC_USER 0x0
#define LOC_PRIV_NET_LOCAL_USER 0x1
#define LOC_PUB_NET_LOCAL_USER 0x2
#define LOC_TRANSIT_NET 0x3
#define LOC_PUB_NET_REMOTE_USER 0x4
#define LOC_PRIV_NET_REMOTE_USER 0x5
#define LOC_INTERNATIONAL_NETWORK 0x7
#define LOC_NETWORK_BEYOND_INTERWORKING 0xa
static char *ie2str(int ie);
static char *msg2str(int msg);
#define FUNC_DUMP(name) void (name)(int full_ie, struct pri *pri, q931_ie *ie, int len, char prefix)
#define FUNC_RECV(name) int (name)(int full_ie, struct pri *pri, q931_call *call, int msgtype, q931_ie *ie, int len)
#define FUNC_SEND(name) int (name)(int full_ie, struct pri *pri, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
#if 1
/* Update call state with transition trace. */
#define UPDATE_OURCALLSTATE(ctrl,c,newstate) do {\
if (ctrl->debug & (PRI_DEBUG_Q931_STATE) && c->ourcallstate != newstate) \
pri_message(ctrl, DBGHEAD "call %d on channel %d enters state %d (%s)\n", DBGINFO, \
c->cr, c->channelno, newstate, q931_call_state_str(newstate)); \
c->ourcallstate = newstate; \
} while (0)
#else
/* Update call state with no trace. */
#define UPDATE_OURCALLSTATE(ctrl,c,newstate) c->ourcallstate = newstate
#endif
struct ie {
/* Maximal count of same IEs at the message (0 - any, 1..n - limited) */
int max_count;
/* IE code */
int ie;
/* IE friendly name */
char *name;
/* Dump an IE for debugging (preceed all lines by prefix) */
FUNC_DUMP(*dump);
/* Handle IE returns 0 on success, -1 on failure */
FUNC_RECV(*receive);
/* Add IE to a message, return the # of bytes added or -1 on failure */
FUNC_SEND(*transmit);
};
static char *code2str(int code, struct msgtype *codes, int max)
{
int x;
for (x=0;x<max; x++)
if (codes[x].msgnum == code)
return codes[x].name;
return "Unknown";
}
static char *pritype(int type)
{
switch (type) {
case PRI_CPE:
return "CPE";
break;
case PRI_NETWORK:
return "NET";
break;
default:
return "UNKNOWN";
}
}
static char *binary(int b, int len) {
static char res[33];
int x;
memset(res, 0, sizeof(res));
if (len > 32)
len = 32;
for (x=1;x<=len;x++)
res[x-1] = b & (1 << (len - x)) ? '1' : '0';
return res;
}
static int receive_channel_id(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
int x;
int pos=0;
#ifdef NO_BRI_SUPPORT
if (!ie->data[0] & 0x20) {
pri_error(ctrl, "!! Not PRI type!?\n");
return -1;
}
#endif
#ifndef NOAUTO_CHANNEL_SELECTION_SUPPORT
if (ctrl->bri) {
if (!(ie->data[0] & 3))
call->justsignalling = 1;
else
call->channelno = ie->data[0] & 3;
} else {
switch (ie->data[0] & 3) {
case 0:
call->justsignalling = 1;
break;
case 1:
break;
default:
pri_error(ctrl, "!! Unexpected Channel selection %d\n", ie->data[0] & 3);
return -1;
}
}
#endif
if (ie->data[0] & 0x08)
call->chanflags = FLAG_EXCLUSIVE;
else
call->chanflags = FLAG_PREFERRED;
pos++;
if (ie->data[0] & 0x40) {
/* DS1 specified -- stop here */
call->ds1no = ie->data[1] & 0x7f;
call->ds1explicit = 1;
pos++;
} else
call->ds1explicit = 0;
if (pos+2 < len) {
/* More coming */
if ((ie->data[pos] & 0x0f) != 3) {
pri_error(ctrl, "!! Unexpected Channel Type %d\n", ie->data[1] & 0x0f);
return -1;
}
if ((ie->data[pos] & 0x60) != 0) {
pri_error(ctrl, "!! Invalid CCITT coding %d\n", (ie->data[1] & 0x60) >> 5);
return -1;
}
if (ie->data[pos] & 0x10) {
/* Expect Slot Map */
call->slotmap = 0;
pos++;
for (x=0;x<3;x++) {
call->slotmap <<= 8;
call->slotmap |= ie->data[x + pos];
}
return 0;
} else {
pos++;
/* Only expect a particular channel */
call->channelno = ie->data[pos] & 0x7f;
if (ctrl->chan_mapping_logical && call->channelno > 15)
call->channelno++;
return 0;
}
} else
return 0;
return -1;
}
static int transmit_channel_id(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
int pos=0;
/* We are ready to transmit single IE only */
if (order > 1)
return 0;
if (call->justsignalling) {
ie->data[pos++] = 0xac; /* Read the standards docs to figure this out
ECMA-165 section 7.3 */
return pos + 2;
}
/* Start with standard stuff */
if (ctrl->switchtype == PRI_SWITCH_GR303_TMC)
ie->data[pos] = 0x69;
else if (ctrl->bri) {
ie->data[pos] = 0x80;
if (call->channelno > -1)
ie->data[pos] |= (call->channelno & 0x3);
} else
ie->data[pos] = 0xa1;
/* Add exclusive flag if necessary */
if (call->chanflags & FLAG_EXCLUSIVE)
ie->data[pos] |= 0x08;
else if (!(call->chanflags & FLAG_PREFERRED)) {
/* Don't need this IE */
return 0;
}
if (((ctrl->switchtype != PRI_SWITCH_QSIG) && (call->ds1no > 0)) || call->ds1explicit) {
/* Note that we are specifying the identifier */
ie->data[pos++] |= 0x40;
/* We need to use the Channel Identifier Present thingy. Just specify it and we're done */
ie->data[pos++] = 0x80 | call->ds1no;
} else
pos++;
if (ctrl->bri)
return pos + 2;
if ((call->channelno > -1) || (call->slotmap != -1)) {
/* We'll have the octet 8.2 and 8.3's present */
ie->data[pos++] = 0x83;
if (call->channelno > -1) {
/* Channel number specified */
if (ctrl->chan_mapping_logical && call->channelno > 16)
ie->data[pos++] = 0x80 | (call->channelno - 1);
else
ie->data[pos++] = 0x80 | call->channelno;
return pos + 2;
}
/* We have to send a channel map */
if (call->slotmap != -1) {
ie->data[pos-1] |= 0x10;
ie->data[pos++] = (call->slotmap & 0xff0000) >> 16;
ie->data[pos++] = (call->slotmap & 0xff00) >> 8;
ie->data[pos++] = (call->slotmap & 0xff);
return pos + 2;
}
}
if (call->ds1no > 0) {
/* We're done */
return pos + 2;
}
pri_error(ctrl, "!! No channel map, no channel, and no ds1? What am I supposed to identify?\n");
return -1;
}
static void dump_channel_id(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
int pos=0;
int x;
int res = 0;
static const char* msg_chan_sel[] = {
"No channel selected", "B1 channel", "B2 channel","Any channel selected",
"No channel selected", "As indicated in following octets", "Reserved","Any channel selected"
};
pri_message(ctrl, "%c Channel ID (len=%2d) [ Ext: %d IntID: %s %s Spare: %d %s Dchan: %d\n",
prefix, len, (ie->data[0] & 0x80) ? 1 : 0, (ie->data[0] & 0x40) ? "Explicit" : "Implicit",
(ie->data[0] & 0x20) ? "PRI" : "Other", (ie->data[0] & 0x10) ? 1 : 0,
(ie->data[0] & 0x08) ? "Exclusive" : "Preferred", (ie->data[0] & 0x04) ? 1 : 0);
pri_message(ctrl, "%c ChanSel: %s\n",
prefix, msg_chan_sel[(ie->data[0] & 0x3) + ((ie->data[0]>>3) & 0x4)]);
pos++;
len--;
if (ie->data[0] & 0x40) {
/* Explicitly defined DS1 */
pri_message(ctrl, "%c Ext: %d DS1 Identifier: %d \n", prefix, (ie->data[pos] & 0x80) >> 7, ie->data[pos] & 0x7f);
pos++;
} else {
/* Implicitly defined DS1 */
}
if (pos+2 < len) {
/* Still more information here */
pri_message(ctrl, "%c Ext: %d Coding: %d %s Specified Channel Type: %d\n",
prefix, (ie->data[pos] & 0x80) >> 7, (ie->data[pos] & 60) >> 5,
(ie->data[pos] & 0x10) ? "Slot Map" : "Number", ie->data[pos] & 0x0f);
if (!(ie->data[pos] & 0x10)) {
/* Number specified */
pos++;
pri_message(ctrl, "%c Ext: %d Channel: %d Type: %s]\n", prefix, (ie->data[pos] & 0x80) >> 7,
(ie->data[pos]) & 0x7f, pritype(ctrl->localtype));
} else {
pos++;
/* Map specified */
for (x=0;x<3;x++) {
res <<= 8;
res |= ie->data[pos++];
}
pri_message(ctrl, "%c Map: %s ]\n", prefix, binary(res, 24));
}
} else pri_message(ctrl, " ]\n");
}
static char *ri2str(int ri)
{
static struct msgtype ris[] = {
{ 0, "Indicated Channel" },
{ 6, "Single DS1 Facility" },
{ 7, "All DS1 Facilities" },
};
return code2str(ri, ris, sizeof(ris) / sizeof(ris[0]));
}
static void dump_restart_indicator(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
pri_message(ctrl, "%c Restart Indentifier (len=%2d) [ Ext: %d Spare: %d Resetting %s (%d) ]\n",
prefix, len, (ie->data[0] & 0x80) >> 7, (ie->data[0] & 0x78) >> 3, ri2str(ie->data[0] & 0x7), ie->data[0] & 0x7);
}
static int receive_restart_indicator(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
/* Pretty simple */
call->ri = ie->data[0] & 0x7;
return 0;
}
static int transmit_restart_indicator(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
/* Pretty simple */
switch(call->ri) {
case 0:
case 6:
case 7:
ie->data[0] = 0x80 | (call->ri & 0x7);
break;
case 5:
/* Switch compatibility */
ie->data[0] = 0xA0 | (call->ri & 0x7);
break;
default:
pri_error(ctrl, "!! Invalid restart indicator value %d\n", call->ri);
return-1;
}
return 3;
}
static char *redirection_reason2str(int mode)
{
static struct msgtype modes[] = {
{ PRI_REDIR_UNKNOWN, "Unknown" },
{ PRI_REDIR_FORWARD_ON_BUSY, "Forwarded on busy" },
{ PRI_REDIR_FORWARD_ON_NO_REPLY, "Forwarded on no reply" },
{ PRI_REDIR_DEFLECTION, "Call deflected" },
{ PRI_REDIR_DTE_OUT_OF_ORDER, "Called DTE out of order" },
{ PRI_REDIR_FORWARDED_BY_DTE, "Forwarded by called DTE" },
{ PRI_REDIR_UNCONDITIONAL, "Forwarded unconditionally" },
};
return code2str(mode, modes, sizeof(modes) / sizeof(modes[0]));
}
static char *cap2str(int mode)
{
static struct msgtype modes[] = {
{ PRI_TRANS_CAP_SPEECH, "Speech" },
{ PRI_TRANS_CAP_DIGITAL, "Unrestricted digital information" },
{ PRI_TRANS_CAP_RESTRICTED_DIGITAL, "Restricted digital information" },
{ PRI_TRANS_CAP_3_1K_AUDIO, "3.1kHz audio" },
{ PRI_TRANS_CAP_DIGITAL_W_TONES, "Unrestricted digital information with tones/announcements" },
{ PRI_TRANS_CAP_VIDEO, "Video" },
{ PRI_TRANS_CAP_AUDIO_4ESS, "3.1khz audio (4ESS)" },
};
return code2str(mode, modes, sizeof(modes) / sizeof(modes[0]));
}
static char *mode2str(int mode)
{
static struct msgtype modes[] = {
{ TRANS_MODE_64_CIRCUIT, "64kbps, circuit-mode" },
{ TRANS_MODE_2x64_CIRCUIT, "2x64kbps, circuit-mode" },
{ TRANS_MODE_384_CIRCUIT, "384kbps, circuit-mode" },
{ TRANS_MODE_1536_CIRCUIT, "1536kbps, circuit-mode" },
{ TRANS_MODE_1920_CIRCUIT, "1920kbps, circuit-mode" },
{ TRANS_MODE_MULTIRATE, "Multirate (Nx64kbps)" },
{ TRANS_MODE_PACKET, "Packet Mode" },
};
return code2str(mode, modes, sizeof(modes) / sizeof(modes[0]));
}
static char *l12str(int proto)
{
static struct msgtype protos[] = {
{ PRI_LAYER_1_ITU_RATE_ADAPT, "V.110 Rate Adaption" },
{ PRI_LAYER_1_ULAW, "u-Law" },
{ PRI_LAYER_1_ALAW, "A-Law" },
{ PRI_LAYER_1_G721, "G.721 ADPCM" },
{ PRI_LAYER_1_G722_G725, "G.722/G.725 7kHz Audio" },
{ PRI_LAYER_1_H223_H245, "H.223/H.245 Multimedia" },
{ PRI_LAYER_1_NON_ITU_ADAPT, "Non-ITU Rate Adaption" },
{ PRI_LAYER_1_V120_RATE_ADAPT, "V.120 Rate Adaption" },
{ PRI_LAYER_1_X31_RATE_ADAPT, "X.31 Rate Adaption" },
};
return code2str(proto, protos, sizeof(protos) / sizeof(protos[0]));
}
static char *ra2str(int proto)
{
static struct msgtype protos[] = {
{ PRI_RATE_ADAPT_9K6, "9.6 kbit/s" },
};
return code2str(proto, protos, sizeof(protos) / sizeof(protos[0]));
}
static char *l22str(int proto)
{
static struct msgtype protos[] = {
{ LAYER_2_LAPB, "LAPB" },
};
return code2str(proto, protos, sizeof(protos) / sizeof(protos[0]));
}
static char *l32str(int proto)
{
static struct msgtype protos[] = {
{ LAYER_3_X25, "X.25" },
};
return code2str(proto, protos, sizeof(protos) / sizeof(protos[0]));
}
static char *int_rate2str(int proto)
{
static struct msgtype protos[] = {
{ PRI_INT_RATE_8K, "8 kbit/s" },
{ PRI_INT_RATE_16K, "16 kbit/s" },
{ PRI_INT_RATE_32K, "32 kbit/s" },
};
return code2str(proto, protos, sizeof(protos) / sizeof(protos[0]));
}
static void dump_bearer_capability(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
int pos=2;
pri_message(ctrl, "%c Bearer Capability (len=%2d) [ Ext: %d Q.931 Std: %d Info transfer capability: %s (%d)\n",
prefix, len, (ie->data[0] & 0x80 ) >> 7, (ie->data[0] & 0x60) >> 5, cap2str(ie->data[0] & 0x1f), (ie->data[0] & 0x1f));
pri_message(ctrl, "%c Ext: %d Trans mode/rate: %s (%d)\n", prefix, (ie->data[1] & 0x80) >> 7, mode2str(ie->data[1] & 0x7f), ie->data[1] & 0x7f);
/* octet 4.1 exists iff mode/rate is multirate */
if ((ie->data[1] & 0x7f) == 0x18) {
pri_message(ctrl, "%c Ext: %d Transfer rate multiplier: %d x 64\n", prefix, (ie->data[2] & 0x80) >> 7, ie->data[2] & 0x7f);
pos++;
}
/* don't count the IE num and length as part of the data */
len -= 2;
/* Look for octet 5; this is identified by bits 5,6 == 01 */
if (pos < len &&
(ie->data[pos] & 0x60) == 0x20) {
/* although the layer1 is only the bottom 5 bits of the byte,
previous versions of this library passed bits 5&6 through
too, so we have to do the same for binary compatability */
u_int8_t layer1 = ie->data[pos] & 0x7f;
pri_message(ctrl, "%c User information layer 1: %s (%d)\n",
prefix, l12str(layer1), layer1);
pos++;
/* octet 5a? */
if (pos < len && !(ie->data[pos-1] & 0x80)) {
int ra = ie->data[pos] & 0x7f;
pri_message(ctrl, "%c Async: %d, Negotiation: %d, "
"User rate: %s (%#x)\n",
prefix,
ra & PRI_RATE_ADAPT_ASYNC ? 1 : 0,
ra & PRI_RATE_ADAPT_NEGOTIATION_POSS ? 1 : 0,
ra2str(ra & PRI_RATE_USER_RATE_MASK),
ra & PRI_RATE_USER_RATE_MASK);
pos++;
}
/* octet 5b? */
if (pos < len && !(ie->data[pos-1] & 0x80)) {
u_int8_t data = ie->data[pos];
if (layer1 == PRI_LAYER_1_ITU_RATE_ADAPT) {
pri_message(ctrl, "%c Intermediate rate: %s (%d), "
"NIC on Tx: %d, NIC on Rx: %d, "
"Flow control on Tx: %d, "
"Flow control on Rx: %d\n",
prefix, int_rate2str((data & 0x60)>>5),
(data & 0x60)>>5,
(data & 0x10)?1:0,
(data & 0x08)?1:0,
(data & 0x04)?1:0,
(data & 0x02)?1:0);
} else if (layer1 == PRI_LAYER_1_V120_RATE_ADAPT) {
pri_message(ctrl, "%c Hdr: %d, Multiframe: %d, Mode: %d, "
"LLI negot: %d, Assignor: %d, "
"In-band neg: %d\n", prefix,
(data & 0x40)?1:0,
(data & 0x20)?1:0,
(data & 0x10)?1:0,
(data & 0x08)?1:0,
(data & 0x04)?1:0,
(data & 0x02)?1:0);
} else {
pri_message(ctrl, "%c Unknown octet 5b: 0x%x\n", data );
}
pos++;
}
/* octet 5c? */
if (pos < len && !(ie->data[pos-1] & 0x80)) {
u_int8_t data = ie->data[pos];
const char *stop_bits[] = {"?","1","1.5","2"};
const char *data_bits[] = {"?","5","7","8"};
const char *parity[] = {"Odd","?","Even","None",
"zero","one","?","?"};
pri_message(ctrl, "%c Stop bits: %s, data bits: %s, "
"parity: %s\n", prefix,
stop_bits[(data & 0x60) >> 5],
data_bits[(data & 0x18) >> 3],
parity[(data & 0x7)]);
pos++;
}
/* octet 5d? */
if (pos < len && !(ie->data[pos-1] & 0x80)) {
u_int8_t data = ie->data[pos];
pri_message(ctrl, "%c Duplex mode: %d, modem type: %d\n",
prefix, (data & 0x40) ? 1 : 0,data & 0x3F);
pos++;
}
}
/* Look for octet 6; this is identified by bits 5,6 == 10 */
if (pos < len &&
(ie->data[pos] & 0x60) == 0x40) {
pri_message(ctrl, "%c User information layer 2: %s (%d)\n",
prefix, l22str(ie->data[pos] & 0x1f),
ie->data[pos] & 0x1f);
pos++;
}
/* Look for octet 7; this is identified by bits 5,6 == 11 */
if (pos < len && (ie->data[pos] & 0x60) == 0x60) {
pri_message(ctrl, "%c User information layer 3: %s (%d)\n",
prefix, l32str(ie->data[pos] & 0x1f),
ie->data[pos] & 0x1f);
pos++;
/* octets 7a and 7b? */
if (pos + 1 < len && !(ie->data[pos-1] & 0x80) &&
!(ie->data[pos] & 0x80)) {
unsigned int proto;
proto = ((ie->data[pos] & 0xF) << 4 ) |
(ie->data[pos+1] & 0xF);
pri_message(ctrl, "%c Network layer: 0x%x\n", prefix,
proto );
pos += 2;
}
}
}
static int receive_bearer_capability(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
int pos=2;
if (ie->data[0] & 0x60) {
pri_error(ctrl, "!! non-standard Q.931 standard field\n");
return -1;
}
call->transcapability = ie->data[0] & 0x1f;
call->transmoderate = ie->data[1] & 0x7f;
/* octet 4.1 exists iff mode/rate is multirate */
if (call->transmoderate == TRANS_MODE_MULTIRATE) {
call->transmultiple = ie->data[pos++] & 0x7f;
}
/* Look for octet 5; this is identified by bits 5,6 == 01 */
if (pos < len &&
(ie->data[pos] & 0x60) == 0x20 ) {
/* although the layer1 is only the bottom 5 bits of the byte,
previous versions of this library passed bits 5&6 through
too, so we have to do the same for binary compatability */
call->userl1 = ie->data[pos] & 0x7f;
pos++;
/* octet 5a? */
if (pos < len && !(ie->data[pos-1] & 0x80)) {
call->rateadaption = ie->data[pos] & 0x7f;
pos++;
}
/* octets 5b through 5d? */
while (pos < len && !(ie->data[pos-1] & 0x80)) {
pos++;
}
}
/* Look for octet 6; this is identified by bits 5,6 == 10 */
if (pos < len &&
(ie->data[pos] & 0x60) == 0x40) {
call->userl2 = ie->data[pos++] & 0x1f;
}
/* Look for octet 7; this is identified by bits 5,6 == 11 */
if (pos < len &&
(ie->data[pos] & 0x60) == 0x60) {
call->userl3 = ie->data[pos++] & 0x1f;
}
return 0;
}
static int transmit_bearer_capability(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
int tc;
int pos;
/* We are ready to transmit single IE only */
if(order > 1)
return 0;
tc = call->transcapability;
if (ctrl->subchannel && !ctrl->bri) {
/* Bearer capability is *hard coded* in GR-303 */
ie->data[0] = 0x88;
ie->data[1] = 0x90;
return 4;
}
if (call->justsignalling) {
ie->data[0] = 0xa8;
ie->data[1] = 0x80;
return 4;
}
ie->data[0] = 0x80 | tc;
ie->data[1] = call->transmoderate | 0x80;
pos = 2;
/* octet 4.1 exists iff mode/rate is multirate */
if (call->transmoderate == TRANS_MODE_MULTIRATE ) {
ie->data[pos++] = call->transmultiple | 0x80;
}
if ((tc & PRI_TRANS_CAP_DIGITAL) && (ctrl->switchtype == PRI_SWITCH_EUROISDN_E1) &&
(call->transmoderate == TRANS_MODE_PACKET)) {
/* Apparently EuroISDN switches don't seem to like user layer 2/3 */
return 4;
}
if ((tc & PRI_TRANS_CAP_DIGITAL) && (call->transmoderate == TRANS_MODE_64_CIRCUIT)) {
/* Unrestricted digital 64k data calls don't use user layer 2/3 */
return 4;
}
if (call->transmoderate != TRANS_MODE_PACKET) {
/* If you have an AT&T 4ESS, you don't send any more info */
if ((ctrl->switchtype != PRI_SWITCH_ATT4ESS) && (call->userl1 > -1)) {
ie->data[pos++] = call->userl1 | 0x80; /* XXX Ext bit? XXX */
if (call->userl1 == PRI_LAYER_1_ITU_RATE_ADAPT) {
ie->data[pos++] = call->rateadaption | 0x80;
}
return pos + 2;
}
ie->data[pos++] = 0xa0 | (call->userl1 & 0x1f);
if (call->userl1 == PRI_LAYER_1_ITU_RATE_ADAPT) {
ie->data[pos-1] &= ~0x80; /* clear EXT bit in octet 5 */
ie->data[pos++] = call->rateadaption | 0x80;
}
}
if (call->userl2 != -1)
ie->data[pos++] = 0xc0 | (call->userl2 & 0x1f);
if (call->userl3 != -1)
ie->data[pos++] = 0xe0 | (call->userl3 & 0x1f);
return pos + 2;
}
char *pri_plan2str(int plan)
{
static struct msgtype plans[] = {
{ PRI_INTERNATIONAL_ISDN, "International number in ISDN" },
{ PRI_NATIONAL_ISDN, "National number in ISDN" },
{ PRI_LOCAL_ISDN, "Local number in ISDN" },
{ PRI_PRIVATE, "Private numbering plan" },
{ PRI_UNKNOWN, "Unknown numbering plan" },
};
return code2str(plan, plans, sizeof(plans) / sizeof(plans[0]));
}
static char *npi2str(int plan)
{
static struct msgtype plans[] = {
{ PRI_NPI_UNKNOWN, "Unknown Number Plan" },
{ PRI_NPI_E163_E164, "ISDN/Telephony Numbering Plan (E.164/E.163)" },
{ PRI_NPI_X121, "Data Numbering Plan (X.121)" },
{ PRI_NPI_F69, "Telex Numbering Plan (F.69)" },
{ PRI_NPI_NATIONAL, "National Standard Numbering Plan" },
{ PRI_NPI_PRIVATE, "Private Numbering Plan" },
{ PRI_NPI_RESERVED, "Reserved Number Plan" },
};
return code2str(plan, plans, sizeof(plans) / sizeof(plans[0]));
}
static char *ton2str(int plan)
{
static struct msgtype plans[] = {
{ PRI_TON_UNKNOWN, "Unknown Number Type" },
{ PRI_TON_INTERNATIONAL, "International Number" },
{ PRI_TON_NATIONAL, "National Number" },
{ PRI_TON_NET_SPECIFIC, "Network Specific Number" },
{ PRI_TON_SUBSCRIBER, "Subscriber Number" },
{ PRI_TON_ABBREVIATED, "Abbreviated number" },
{ PRI_TON_RESERVED, "Reserved Number" },
};
return code2str(plan, plans, sizeof(plans) / sizeof(plans[0]));
}
static char *subaddrtype2str(int plan)
{
static struct msgtype plans[] = {
{ 0, "NSAP (X.213/ISO 8348 AD2)" },
{ 2, "User Specified" },
};
return code2str(plan, plans, sizeof(plans) / sizeof(plans[0]));
}
char *pri_pres2str(int pres)
{
static struct msgtype press[] = {
{ PRES_ALLOWED_USER_NUMBER_NOT_SCREENED, "Presentation permitted, user number not screened" },
{ PRES_ALLOWED_USER_NUMBER_PASSED_SCREEN, "Presentation permitted, user number passed network screening" },
{ PRES_ALLOWED_USER_NUMBER_FAILED_SCREEN, "Presentation permitted, user number failed network screening" },
{ PRES_ALLOWED_NETWORK_NUMBER, "Presentation allowed of network provided number" },
{ PRES_PROHIB_USER_NUMBER_NOT_SCREENED, "Presentation prohibited, user number not screened" },
{ PRES_PROHIB_USER_NUMBER_PASSED_SCREEN, "Presentation prohibited, user number passed network screening" },
{ PRES_PROHIB_USER_NUMBER_FAILED_SCREEN, "Presentation prohibited, user number failed network screening" },
{ PRES_PROHIB_NETWORK_NUMBER, "Presentation prohibited of network provided number" },
{ PRES_NUMBER_NOT_AVAILABLE, "Number not available" },
};
return code2str(pres, press, sizeof(press) / sizeof(press[0]));
}
static void q931_get_number(unsigned char *num, int maxlen, unsigned char *src, int len)
{
if ((len < 0) || (len > maxlen - 1)) {
num[0] = 0;
return;
}
memcpy(num, src, len);
num[len] = 0;
}
static void dump_called_party_number(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
unsigned char cnum[256];
q931_get_number(cnum, sizeof(cnum), ie->data + 1, len - 3);
pri_message(ctrl, "%c Called Number (len=%2d) [ Ext: %d TON: %s (%d) NPI: %s (%d) '%s' ]\n",
prefix, len, ie->data[0] >> 7, ton2str((ie->data[0] >> 4) & 0x07), (ie->data[0] >> 4) & 0x07, npi2str(ie->data[0] & 0x0f), ie->data[0] & 0x0f, cnum);
}
static void dump_called_party_subaddr(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
unsigned char cnum[256];
q931_get_number(cnum, sizeof(cnum), ie->data + 1, len - 3);
pri_message(ctrl, "%c Called Sub-Address (len=%2d) [ Ext: %d Type: %s (%d) O: %d '%s' ]\n",
prefix, len, ie->data[0] >> 7,
subaddrtype2str((ie->data[0] & 0x70) >> 4), (ie->data[0] & 0x70) >> 4,
(ie->data[0] & 0x08) >> 3, cnum);
}
static void dump_calling_party_number(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
unsigned char cnum[256];
if (ie->data[0] & 0x80)
q931_get_number(cnum, sizeof(cnum), ie->data + 1, len - 3);
else
q931_get_number(cnum, sizeof(cnum), ie->data + 2, len - 4);
pri_message(ctrl, "%c Calling Number (len=%2d) [ Ext: %d TON: %s (%d) NPI: %s (%d)\n", prefix, len, ie->data[0] >> 7, ton2str((ie->data[0] >> 4) & 0x07), (ie->data[0] >> 4) & 0x07, npi2str(ie->data[0] & 0x0f), ie->data[0] & 0x0f);
if (ie->data[0] & 0x80)
pri_message(ctrl, "%c Presentation: %s (%d) '%s' ]\n", prefix, pri_pres2str(0), 0, cnum);
else
pri_message(ctrl, "%c Presentation: %s (%d) '%s' ]\n", prefix, pri_pres2str(ie->data[1] & 0x7f), ie->data[1] & 0x7f, cnum);
}
static void dump_calling_party_subaddr(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
unsigned char cnum[256];
q931_get_number(cnum, sizeof(cnum), ie->data + 1, len - 3);
pri_message(ctrl, "%c Calling Sub-Address (len=%2d) [ Ext: %d Type: %s (%d) O: %d '%s' ]\n",
prefix, len, ie->data[0] >> 7,
subaddrtype2str((ie->data[0] & 0x70) >> 4), (ie->data[0] & 0x70) >> 4,
(ie->data[0] & 0x08) >> 3, cnum);
}
static void dump_redirecting_number(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
unsigned char cnum[256];
int i = 0;
/* To follow Q.931 (4.5.1), we must search for start of octet 4 by
walking through all bytes until one with ext bit (8) set to 1 */
do {
switch(i) {
case 0: /* Octet 3 */
pri_message(ctrl, "%c Redirecting Number (len=%2d) [ Ext: %d TON: %s (%d) NPI: %s (%d)",
prefix, len, ie->data[0] >> 7, ton2str((ie->data[0] >> 4) & 0x07), (ie->data[0] >> 4) & 0x07, npi2str(ie->data[0] & 0x0f), ie->data[0] & 0x0f);
break;
case 1: /* Octet 3a */
pri_message(ctrl, "\n%c Ext: %d Presentation: %s (%d)",
prefix, ie->data[1] >> 7, pri_pres2str(ie->data[1] & 0x7f), ie->data[1] & 0x7f);
break;
case 2: /* Octet 3b */
pri_message(ctrl, "\n%c Ext: %d Reason: %s (%d)",
prefix, ie->data[2] >> 7, redirection_reason2str(ie->data[2] & 0x7f), ie->data[2] & 0x7f);
break;
}
} while(!(ie->data[i++]& 0x80));
q931_get_number(cnum, sizeof(cnum), ie->data + i, ie->len - i);
pri_message(ctrl, " '%s' ]\n", cnum);
}
static void dump_connected_number(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
unsigned char cnum[256];
int i = 0;
/* To follow Q.931 (4.5.1), we must search for start of octet 4 by
walking through all bytes until one with ext bit (8) set to 1 */
do {
switch(i) {
case 0: /* Octet 3 */
pri_message(ctrl, "%c Connected Number (len=%2d) [ Ext: %d TON: %s (%d) NPI: %s (%d)",
prefix, len, ie->data[0] >> 7, ton2str((ie->data[0] >> 4) & 0x07), (ie->data[0] >> 4) & 0x07, npi2str(ie->data[0] & 0x0f), ie->data[0] & 0x0f);
break;
case 1: /* Octet 3a */
pri_message(ctrl, "\n%c Ext: %d Presentation: %s (%d)",
prefix, ie->data[1] >> 7, pri_pres2str(ie->data[1] & 0x7f), ie->data[1] & 0x7f);
break;
}
} while(!(ie->data[i++]& 0x80));
q931_get_number(cnum, sizeof(cnum), ie->data + i, ie->len - i);
pri_message(ctrl, " '%s' ]\n", cnum);
}
static int receive_redirecting_number(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
int i = 0;
/* To follow Q.931 (4.5.1), we must search for start of octet 4 by
walking through all bytes until one with ext bit (8) set to 1 */
do {
switch(i) {
case 0:
call->redirectingplan = ie->data[i] & 0x7f;
break;
case 1:
call->redirectingpres = ie->data[i] & 0x7f;
break;
case 2:
call->redirectingreason = ie->data[i] & 0x0f;
break;
}
} while(!(ie->data[i++] & 0x80));
q931_get_number((unsigned char *) call->redirectingnum, sizeof(call->redirectingnum), ie->data + i, ie->len - i);
return 0;
}
static int transmit_redirecting_number(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
if (order > 1)
return 0;
if (call->redirectingnum && *call->redirectingnum) {
ie->data[0] = call->redirectingplan;
ie->data[1] = call->redirectingpres;
ie->data[2] = (call->redirectingreason & 0x0f) | 0x80;
memcpy(ie->data + 3, call->redirectingnum, strlen(call->redirectingnum));
return strlen(call->redirectingnum) + 3 + 2;
}
return 0;
}
static void dump_redirecting_subaddr(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
unsigned char cnum[256];
q931_get_number(cnum, sizeof(cnum), ie->data + 2, len - 4);
pri_message(ctrl, "%c Redirecting Sub-Address (len=%2d) [ Ext: %d Type: %s (%d) O: %d '%s' ]\n",
prefix, len, ie->data[0] >> 7,
subaddrtype2str((ie->data[0] & 0x70) >> 4), (ie->data[0] & 0x70) >> 4,
(ie->data[0] & 0x08) >> 3, cnum);
}
static int receive_calling_party_subaddr(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
/* copy digits to call->callingsubaddr */
q931_get_number((unsigned char *) call->callingsubaddr, sizeof(call->callingsubaddr), ie->data + 1, len - 3);
return 0;
}
static int receive_called_party_number(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
/* copy digits to call->callednum */
q931_get_number((unsigned char *) call->callednum, sizeof(call->callednum), ie->data + 1, len - 3);
call->calledplan = ie->data[0] & 0x7f;
return 0;
}
static int transmit_called_party_number(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
ie->data[0] = 0x80 | call->calledplan;
if (*call->callednum)
memcpy(ie->data + 1, call->callednum, strlen(call->callednum));
return strlen(call->callednum) + 3;
}
static int receive_calling_party_number(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
u_int8_t *data;
size_t length;
if (ie->data[0] & 0x80) {
data = ie->data + 1;
length = len - 3;
call->callerpres = 0; /* PI presentation allowed SI user-provided, not screened */
} else {
data = ie->data + 2;
length = len - 4;
call->callerpres = ie->data[1] & 0x7f;
}
if (call->callerpres == PRES_ALLOWED_NETWORK_NUMBER ||
call->callerpres == PRES_PROHIB_NETWORK_NUMBER) {
q931_get_number((u_int8_t *)call->callerani, sizeof(call->callerani), data, length);
call->callerplanani = ie->data[0] & 0x7f;
if (!*call->callernum) { /*Copy ANI to CallerID if CallerID is not already set */
libpri_copy_string(call->callernum, call->callerani, sizeof(call->callernum));
call->callerplan = call->callerplanani;
}
} else {
q931_get_number((u_int8_t *)call->callernum, sizeof(call->callernum), data, length);
call->callerplan = ie->data[0] & 0x7f;
}
return 0;
}
static int transmit_calling_party_number(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
ie->data[0] = call->callerplan;
ie->data[1] = 0x80 | call->callerpres;
if (*call->callernum)
memcpy(ie->data + 2, call->callernum, strlen(call->callernum));
return strlen(call->callernum) + 4;
}
static void dump_user_user(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
int x;
pri_message(ctrl, "%c User-User Information (len=%2d) [", prefix, len);
for (x=0;x<ie->len;x++)
pri_message(ctrl, " %02x", ie->data[x] & 0x7f);
pri_message(ctrl, " ]\n");
}
static int receive_user_user(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
call->useruserprotocoldisc = ie->data[0] & 0xff;
if (call->useruserprotocoldisc == 4) /* IA5 */
q931_get_number((unsigned char *) call->useruserinfo, sizeof(call->useruserinfo), ie->data + 1, len - 3);
return 0;
}
static int transmit_user_user(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
int datalen = strlen(call->useruserinfo);
if (datalen > 0) {
/* Restricted to 35 characters */
if (msgtype == Q931_USER_INFORMATION) {
if (datalen > 260)
datalen = 260;
} else {
if (datalen > 35)
datalen = 35;
}
ie->data[0] = 4; /* IA5 characters */
memcpy(&ie->data[1], call->useruserinfo, datalen);
call->useruserinfo[0] = '\0';
return datalen + 3;
}
return 0;
}
static void dump_change_status(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
int x;
pri_message(ctrl, "%c Change Status Information (len=%2d) [", prefix, len);
for (x=0; x<ie->len; x++) {
pri_message(ctrl, " %02x", ie->data[x] & 0x7f);
}
pri_message(ctrl, " ]\n");
}
static int receive_change_status(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
call->changestatus = ie->data[0] & 0x0f;
return 0;
}
static int transmit_change_status(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
ie->data[0] = 0xc0 | call->changestatus;
return 3;
}
static char *prog2str(int prog)
{
static struct msgtype progs[] = {
{ Q931_PROG_CALL_NOT_E2E_ISDN, "Call is not end-to-end ISDN; further call progress information may be available inband." },
{ Q931_PROG_CALLED_NOT_ISDN, "Called equipment is non-ISDN." },
{ Q931_PROG_CALLER_NOT_ISDN, "Calling equipment is non-ISDN." },
{ Q931_PROG_INBAND_AVAILABLE, "Inband information or appropriate pattern now available." },
{ Q931_PROG_DELAY_AT_INTERF, "Delay in response at called Interface." },
{ Q931_PROG_INTERWORKING_WITH_PUBLIC, "Interworking with a public network." },
{ Q931_PROG_INTERWORKING_NO_RELEASE, "Interworking with a network unable to supply a release signal." },
{ Q931_PROG_INTERWORKING_NO_RELEASE_PRE_ANSWER, "Interworking with a network unable to supply a release signal before answer." },
{ Q931_PROG_INTERWORKING_NO_RELEASE_POST_ANSWER, "Interworking with a network unable to supply a release signal after answer." },
};
return code2str(prog, progs, sizeof(progs) / sizeof(progs[0]));
}
static char *coding2str(int cod)
{
static struct msgtype cods[] = {
{ CODE_CCITT, "CCITT (ITU) standard" },
{ CODE_INTERNATIONAL, "Non-ITU international standard" },
{ CODE_NATIONAL, "National standard" },
{ CODE_NETWORK_SPECIFIC, "Network specific standard" },
};
return code2str(cod, cods, sizeof(cods) / sizeof(cods[0]));
}
static char *loc2str(int loc)
{
static struct msgtype locs[] = {
{ LOC_USER, "User" },
{ LOC_PRIV_NET_LOCAL_USER, "Private network serving the local user" },
{ LOC_PUB_NET_LOCAL_USER, "Public network serving the local user" },
{ LOC_TRANSIT_NET, "Transit network" },
{ LOC_PUB_NET_REMOTE_USER, "Public network serving the remote user" },
{ LOC_PRIV_NET_REMOTE_USER, "Private network serving the remote user" },
{ LOC_INTERNATIONAL_NETWORK, "International network" },
{ LOC_NETWORK_BEYOND_INTERWORKING, "Network beyond the interworking point" },
};
return code2str(loc, locs, sizeof(locs) / sizeof(locs[0]));
}
static void dump_progress_indicator(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
pri_message(ctrl, "%c Progress Indicator (len=%2d) [ Ext: %d Coding: %s (%d) 0: %d Location: %s (%d)\n",
prefix, len, ie->data[0] >> 7, coding2str((ie->data[0] & 0x60) >> 5), (ie->data[0] & 0x60) >> 5,
(ie->data[0] & 0x10) >> 4, loc2str(ie->data[0] & 0xf), ie->data[0] & 0xf);
pri_message(ctrl, "%c Ext: %d Progress Description: %s (%d) ]\n",
prefix, ie->data[1] >> 7, prog2str(ie->data[1] & 0x7f), ie->data[1] & 0x7f);
}
static int receive_display(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
unsigned char *data;
data = ie->data;
if (data[0] & 0x80) {
/* Skip over character set */
data++;
len--;
}
q931_get_number((unsigned char *) call->callername, sizeof(call->callername), data, len - 2);
return 0;
}
static int transmit_display(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
int i;
if ((ctrl->switchtype == PRI_SWITCH_QSIG) ||
((ctrl->switchtype == PRI_SWITCH_EUROISDN_E1) && (ctrl->localtype == PRI_CPE)) ||
!call->callername[0])
return 0;
i = 0;
if(ctrl->switchtype != PRI_SWITCH_EUROISDN_E1) {
ie->data[0] = 0xb1;
++i;
}
memcpy(ie->data + i, call->callername, strlen(call->callername));
return 2 + i + strlen(call->callername);
}
static int receive_progress_indicator(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
call->progloc = ie->data[0] & 0xf;
call->progcode = (ie->data[0] & 0x60) >> 5;
switch (call->progress = (ie->data[1] & 0x7f)) {
case Q931_PROG_CALL_NOT_E2E_ISDN:
call->progressmask |= PRI_PROG_CALL_NOT_E2E_ISDN;
break;
case Q931_PROG_CALLED_NOT_ISDN:
call->progressmask |= PRI_PROG_CALLED_NOT_ISDN;
break;
case Q931_PROG_CALLER_NOT_ISDN:
call->progressmask |= PRI_PROG_CALLER_NOT_ISDN;
break;
case Q931_PROG_CALLER_RETURNED_TO_ISDN:
call->progressmask |= PRI_PROG_CALLER_RETURNED_TO_ISDN;
break;
case Q931_PROG_INBAND_AVAILABLE:
call->progressmask |= PRI_PROG_INBAND_AVAILABLE;
break;
case Q931_PROG_DELAY_AT_INTERF:
call->progressmask |= PRI_PROG_DELAY_AT_INTERF;
break;
case Q931_PROG_INTERWORKING_WITH_PUBLIC:
call->progressmask |= PRI_PROG_INTERWORKING_WITH_PUBLIC;
break;
case Q931_PROG_INTERWORKING_NO_RELEASE:
call->progressmask |= PRI_PROG_INTERWORKING_NO_RELEASE;
break;
case Q931_PROG_INTERWORKING_NO_RELEASE_PRE_ANSWER:
call->progressmask |= PRI_PROG_INTERWORKING_NO_RELEASE_PRE_ANSWER;
break;
case Q931_PROG_INTERWORKING_NO_RELEASE_POST_ANSWER:
call->progressmask |= PRI_PROG_INTERWORKING_NO_RELEASE_POST_ANSWER;
break;
default:
pri_error(ctrl, "XXX Invalid Progress indicator value received: %02x\n",(ie->data[1] & 0x7f));
break;
}
return 0;
}
static int transmit_facility(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
struct apdu_event *tmp;
int i = 0;
for (tmp = call->apdus; tmp; tmp = tmp->next) {
if ((tmp->message == msgtype) && !tmp->sent)
break;
}
if (!tmp) /* No APDU found */
return 0;
if (ctrl->debug & PRI_DEBUG_APDU) {
pri_message(ctrl, "Adding facility ie contents to send in %s message:\n",
msg2str(msgtype));
facility_decode_dump(ctrl, tmp->apdu, tmp->apdu_len);
}
if (tmp->apdu_len > 235) { /* TODO: find out how much space we can use */
pri_message(ctrl, "Requested APDU (%d bytes) is too long\n", tmp->apdu_len);
return 0;
}
memcpy(&ie->data[i], tmp->apdu, tmp->apdu_len);
i += tmp->apdu_len;
tmp->sent = 1;
return i + 2;
}
static int receive_facility(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
struct fac_extension_header header;
struct rose_message rose;
const unsigned char *pos;
const unsigned char *end;
pos = ie->data;
end = ie->data + ie->len;
/* Make sure we have enough room for the protocol profile ie octet(s) */
if (end < pos + 2) {
return -1;
}
switch (*pos & Q932_PROTOCOL_MASK) {
case Q932_PROTOCOL_ROSE:
case Q932_PROTOCOL_EXTENSIONS:
break;
default:
case Q932_PROTOCOL_CMIP:
case Q932_PROTOCOL_ACSE:
if (ctrl->debug & PRI_DEBUG_APDU) {
pri_message(ctrl,
"!! Don't know how to handle Q.932 Protocol Profile type 0x%X\n",
*pos & Q932_PROTOCOL_MASK);
}
return -1;
}
if (!(*pos & 0x80)) {
/* DMS-100 Service indicator octet - Just ignore for now */
++pos;
}
++pos;
if (ctrl->debug & PRI_DEBUG_APDU) {
asn1_dump(ctrl, pos, end);
}
pos = fac_dec_extension_header(ctrl, pos, end, &header);
if (!pos) {
return -1;
}
if (header.npp_present) {
if (ctrl->debug & PRI_DEBUG_APDU) {
pri_message(ctrl,
"!! Don't know how to handle Network Protocol Profile type 0x%X\n",
header.npp);
}
return -1;
}
pos = rose_decode(ctrl, pos, end, &rose);
if (!pos) {
return -1;
}
switch (rose.type) {
case ROSE_COMP_TYPE_INVOKE:
rose_handle_invoke(ctrl, call, ie, &header, &rose.component.invoke);
break;
case ROSE_COMP_TYPE_RESULT:
rose_handle_result(ctrl, call, ie, &header, &rose.component.result);
break;
case ROSE_COMP_TYPE_ERROR:
rose_handle_error(ctrl, call, ie, &header, &rose.component.error);
break;
case ROSE_COMP_TYPE_REJECT:
rose_handle_reject(ctrl, call, ie, &header, &rose.component.reject);
break;
default:
return -1;
}
return 0;
}
static int transmit_progress_indicator(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
int code, mask;
/* Can't send progress indicator on GR-303 -- EVER! */
if (ctrl->subchannel && !ctrl->bri)
return 0;
if (call->progressmask > 0) {
if (call->progressmask & (mask = PRI_PROG_CALL_NOT_E2E_ISDN))
code = Q931_PROG_CALL_NOT_E2E_ISDN;
else if (call->progressmask & (mask = PRI_PROG_CALLED_NOT_ISDN))
code = Q931_PROG_CALLED_NOT_ISDN;
else if (call->progressmask & (mask = PRI_PROG_CALLER_NOT_ISDN))
code = Q931_PROG_CALLER_NOT_ISDN;
else if (call->progressmask & (mask = PRI_PROG_INBAND_AVAILABLE))
code = Q931_PROG_INBAND_AVAILABLE;
else if (call->progressmask & (mask = PRI_PROG_DELAY_AT_INTERF))
code = Q931_PROG_DELAY_AT_INTERF;
else if (call->progressmask & (mask = PRI_PROG_INTERWORKING_WITH_PUBLIC))
code = Q931_PROG_INTERWORKING_WITH_PUBLIC;
else if (call->progressmask & (mask = PRI_PROG_INTERWORKING_NO_RELEASE))
code = Q931_PROG_INTERWORKING_NO_RELEASE;
else if (call->progressmask & (mask = PRI_PROG_INTERWORKING_NO_RELEASE_PRE_ANSWER))
code = Q931_PROG_INTERWORKING_NO_RELEASE_PRE_ANSWER;
else if (call->progressmask & (mask = PRI_PROG_INTERWORKING_NO_RELEASE_POST_ANSWER))
code = Q931_PROG_INTERWORKING_NO_RELEASE_POST_ANSWER;
else {
code = 0;
pri_error(ctrl, "XXX Undefined progress bit: %x\n", call->progressmask);
}
if (code) {
ie->data[0] = 0x80 | (call->progcode << 5) | (call->progloc);
ie->data[1] = 0x80 | code;
call->progressmask &= ~mask;
return 4;
}
}
/* Leave off */
return 0;
}
static int transmit_call_state(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
if (call->ourcallstate > -1 ) {
ie->data[0] = call->ourcallstate;
return 3;
}
return 0;
}
static int receive_call_state(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
call->sugcallstate = ie->data[0] & 0x3f;
return 0;
}
/*!
* \brief Convert the internal Q.931 call state to a string.
*
* \param callstate Internal Q.931 call state.
*
* \return String equivalent of the given Q.931 call state.
*/
static const char *q931_call_state_str(int callstate)
{
static struct msgtype callstates[] = {
{ 0, "Null" },
{ 1, "Call Initiated" },
{ 2, "Overlap sending" },
{ 3, "Outgoing call Proceeding" },
{ 4, "Call Delivered" },
{ 6, "Call Present" },
{ 7, "Call Received" },
{ 8, "Connect Request" },
{ 9, "Incoming Call Proceeding" },
{ 10, "Active" },
{ 11, "Disconnect Request" },
{ 12, "Disconnect Indication" },
{ 15, "Suspend Request" },
{ 17, "Resume Request" },
{ 19, "Release Request" },
{ 22, "Call Abort" },
{ 25, "Overlap Receiving" },
{ 61, "Restart Request" },
{ 62, "Restart" },
};
return code2str(callstate, callstates, sizeof(callstates) / sizeof(callstates[0]));
}
static void dump_call_state(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
pri_message(ctrl, "%c Call State (len=%2d) [ Ext: %d Coding: %s (%d) Call state: %s (%d)\n",
prefix, len, ie->data[0] >> 7, coding2str((ie->data[0] & 0xC0) >> 6), (ie->data[0] & 0xC0) >> 6,
q931_call_state_str(ie->data[0] & 0x3f), ie->data[0] & 0x3f);
}
static void dump_call_identity(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
int x;
pri_message(ctrl, "%c Call Identity (len=%2d) [ ", prefix, len);
for (x=0;x<ie->len;x++)
pri_message(ctrl, "0x%02X ", ie->data[x]);
pri_message(ctrl, " ]\n");
}
static void dump_time_date(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
pri_message(ctrl, "%c Time Date (len=%2d) [ ", prefix, len);
if (ie->len > 0)
pri_message(ctrl, "%02d", ie->data[0]);
if (ie->len > 1)
pri_message(ctrl, "-%02d", ie->data[1]);
if (ie->len > 2)
pri_message(ctrl, "-%02d", ie->data[2]);
if (ie->len > 3)
pri_message(ctrl, " %02d", ie->data[3]);
if (ie->len > 4)
pri_message(ctrl, ":%02d", ie->data[4]);
if (ie->len > 5)
pri_message(ctrl, ":%02d", ie->data[5]);
pri_message(ctrl, " ]\n");
}
static void dump_keypad_facility(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
char tmp[64];
if (ie->len == 0 || ie->len > sizeof(tmp))
return;
memcpy(tmp, ie->data, ie->len);
tmp[ie->len] = '\0';
pri_message(ctrl, "%c Keypad Facility (len=%2d) [ %s ]\n", prefix, ie->len, tmp );
}
static int receive_keypad_facility(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
int mylen;
if (ie->len == 0)
return -1;
if (ie->len > (sizeof(call->keypad_digits) - 1))
mylen = (sizeof(call->keypad_digits) - 1);
else
mylen = ie->len;
memcpy(call->keypad_digits, ie->data, mylen);
call->keypad_digits[mylen] = 0;
return 0;
}
static int transmit_keypad_facility(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
int sublen;
sublen = strlen(call->keypad_digits);
if (sublen > 32) {
sublen = 32;
call->keypad_digits[32] = '\0';
}
if (sublen) {
libpri_copy_string((char *)ie->data, (char *)call->keypad_digits, sizeof(call->keypad_digits));
/* Make sure we clear the field */
call->keypad_digits[0] = '\0';
return sublen + 2;
} else
return 0;
}
static void dump_display(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
int x, y;
char *buf = malloc(len + 1);
char tmp[80] = "";
if (buf) {
x=y=0;
if ((x < ie->len) && (ie->data[x] & 0x80)) {
sprintf(tmp, "Charset: %02x ", ie->data[x] & 0x7f);
++x;
}
for (y=x; x<ie->len; x++)
buf[x] = ie->data[x] & 0x7f;
buf[x] = '\0';
pri_message(ctrl, "%c Display (len=%2d) %s[ %s ]\n", prefix, ie->len, tmp, &buf[y]);
free(buf);
}
}
#define CHECK_OVERFLOW(limit) \
if (tmpptr - tmp + limit >= sizeof(tmp)) { \
*tmpptr = '\0'; \
pri_message(ctrl, "%s", tmpptr = tmp); \
}
static void dump_ie_data(struct pri *ctrl, unsigned char *c, int len)
{
static char hexs[16] = "0123456789ABCDEF";
char tmp[1024], *tmpptr;
int lastascii = 0;
tmpptr = tmp;
for (; len; --len, ++c) {
CHECK_OVERFLOW(7);
if (isprint(*c)) {
if (!lastascii) {
if (tmpptr != tmp) {
*tmpptr++ = ',';
*tmpptr++ = ' ';
}
*tmpptr++ = '\'';
lastascii = 1;
}
*tmpptr++ = *c;
} else {
if (lastascii) {
*tmpptr++ = '\'';
lastascii = 0;
}
if (tmpptr != tmp) {
*tmpptr++ = ',';
*tmpptr++ = ' ';
}
*tmpptr++ = '0';
*tmpptr++ = 'x';
*tmpptr++ = hexs[(*c >> 4) & 0x0f];
*tmpptr++ = hexs[(*c) & 0x0f];
}
}
if (lastascii)
*tmpptr++ = '\'';
*tmpptr = '\0';
pri_message(ctrl, "%s", tmp);
}
static void dump_facility(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
int dataat = (ie->data[0] & 0x80) ? 1 : 2;
pri_message(ctrl, "%c Facility (len=%2d, codeset=%d) [ ", prefix, len, Q931_IE_CODESET(full_ie));
dump_ie_data(ctrl, ie->data, ie->len);
pri_message(NULL, " ]\n");
if (ie->len > 1) {
pri_message(ctrl, "PROTOCOL %02X\n", ie->data[0] & Q932_PROTOCOL_MASK);
asn1_dump(ctrl, ie->data + dataat, ie->data + ie->len);
}
}
static void dump_network_spec_fac(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
pri_message(ctrl, "%c Network-Specific Facilities (len=%2d) [ ", prefix, ie->len);
if (ie->data[0] == 0x00) {
pri_message(ctrl, "%s", code2str(ie->data[1], facilities, ARRAY_LEN(facilities)));
}
else
dump_ie_data(ctrl, ie->data, ie->len);
pri_message(ctrl, " ]\n");
}
static int receive_network_spec_fac(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
return 0;
}
static int transmit_network_spec_fac(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
/* We are ready to transmit single IE only */
if (order > 1)
return 0;
if (ctrl->nsf != PRI_NSF_NONE) {
ie->data[0] = 0x00;
ie->data[1] = ctrl->nsf;
return 4;
}
/* Leave off */
return 0;
}
char *pri_cause2str(int cause)
{
return code2str(cause, causes, sizeof(causes) / sizeof(causes[0]));
}
static char *pri_causeclass2str(int cause)
{
static struct msgtype causeclasses[] = {
{ 0, "Normal Event" },
{ 1, "Normal Event" },
{ 2, "Network Congestion (resource unavailable)" },
{ 3, "Service or Option not Available" },
{ 4, "Service or Option not Implemented" },
{ 5, "Invalid message (e.g. parameter out of range)" },
{ 6, "Protocol Error (e.g. unknown message)" },
{ 7, "Interworking" },
};
return code2str(cause, causeclasses, sizeof(causeclasses) / sizeof(causeclasses[0]));
}
static void dump_cause(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
int x;
pri_message(ctrl, "%c Cause (len=%2d) [ Ext: %d Coding: %s (%d) Spare: %d Location: %s (%d)\n",
prefix, len, ie->data[0] >> 7, coding2str((ie->data[0] & 0x60) >> 5), (ie->data[0] & 0x60) >> 5,
(ie->data[0] & 0x10) >> 4, loc2str(ie->data[0] & 0xf), ie->data[0] & 0xf);
pri_message(ctrl, "%c Ext: %d Cause: %s (%d), class = %s (%d) ]\n",
prefix, (ie->data[1] >> 7), pri_cause2str(ie->data[1] & 0x7f), ie->data[1] & 0x7f,
pri_causeclass2str((ie->data[1] & 0x7f) >> 4), (ie->data[1] & 0x7f) >> 4);
if (ie->len < 3)
return;
/* Dump cause data in readable form */
switch(ie->data[1] & 0x7f) {
case PRI_CAUSE_IE_NONEXIST:
for (x=2;x<ie->len;x++)
pri_message(ctrl, "%c Cause data %d: %02x (%d, %s IE)\n", prefix, x-1, ie->data[x], ie->data[x], ie2str(ie->data[x]));
break;
case PRI_CAUSE_WRONG_CALL_STATE:
for (x=2;x<ie->len;x++)
pri_message(ctrl, "%c Cause data %d: %02x (%d, %s message)\n", prefix, x-1, ie->data[x], ie->data[x], msg2str(ie->data[x]));
break;
case PRI_CAUSE_RECOVERY_ON_TIMER_EXPIRE:
pri_message(ctrl, "%c Cause data:", prefix);
for (x=2;x<ie->len;x++)
pri_message(ctrl, " %02x", ie->data[x]);
pri_message(ctrl, " (Timer T");
for (x=2;x<ie->len;x++)
pri_message(ctrl, "%c", ((ie->data[x] >= ' ') && (ie->data[x] < 0x7f)) ? ie->data[x] : '.');
pri_message(ctrl, ")\n");
break;
default:
for (x=2;x<ie->len;x++)
pri_message(ctrl, "%c Cause data %d: %02x (%d)\n", prefix, x-1, ie->data[x], ie->data[x]);
break;
}
}
static int receive_cause(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
call->causeloc = ie->data[0] & 0xf;
call->causecode = (ie->data[0] & 0x60) >> 5;
call->cause = (ie->data[1] & 0x7f);
return 0;
}
static int transmit_cause(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
/* We are ready to transmit single IE only */
if (order > 1)
return 0;
if (call->cause > 0) {
ie->data[0] = 0x80 | (call->causecode << 5) | (call->causeloc);
ie->data[1] = 0x80 | (call->cause);
return 4;
} else {
/* Leave off */
return 0;
}
}
static void dump_sending_complete(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
pri_message(ctrl, "%c Sending Complete (len=%2d)\n", prefix, len);
}
static int receive_sending_complete(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
/* We've got a "Complete" message: Exect no further digits. */
call->complete = 1;
return 0;
}
static int transmit_sending_complete(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
if ((ctrl->overlapdial && call->complete) || /* Explicit */
(!ctrl->overlapdial && ((ctrl->switchtype == PRI_SWITCH_EUROISDN_E1) ||
/* Implicit */ (ctrl->switchtype == PRI_SWITCH_EUROISDN_T1)))) {
/* Include this single-byte IE */
return 1;
}
return 0;
}
static char *notify2str(int info)
{
/* ITU-T Q.763 */
static struct msgtype notifies[] = {
{ PRI_NOTIFY_USER_SUSPENDED, "User suspended" },
{ PRI_NOTIFY_USER_RESUMED, "User resumed" },
{ PRI_NOTIFY_BEARER_CHANGE, "Bearer service change (DSS1)" },
{ PRI_NOTIFY_ASN1_COMPONENT, "ASN.1 encoded component (DSS1)" },
{ PRI_NOTIFY_COMPLETION_DELAY, "Call completion delay" },
{ PRI_NOTIFY_CONF_ESTABLISHED, "Conference established" },
{ PRI_NOTIFY_CONF_DISCONNECTED, "Conference disconnected" },
{ PRI_NOTIFY_CONF_PARTY_ADDED, "Other party added" },
{ PRI_NOTIFY_CONF_ISOLATED, "Isolated" },
{ PRI_NOTIFY_CONF_REATTACHED, "Reattached" },
{ PRI_NOTIFY_CONF_OTHER_ISOLATED, "Other party isolated" },
{ PRI_NOTIFY_CONF_OTHER_REATTACHED, "Other party reattached" },
{ PRI_NOTIFY_CONF_OTHER_SPLIT, "Other party split" },
{ PRI_NOTIFY_CONF_OTHER_DISCONNECTED, "Other party disconnected" },
{ PRI_NOTIFY_CONF_FLOATING, "Conference floating" },
{ PRI_NOTIFY_WAITING_CALL, "Call is waiting call" },
{ PRI_NOTIFY_DIVERSION_ACTIVATED, "Diversion activated (DSS1)" },
{ PRI_NOTIFY_TRANSFER_ALERTING, "Call transfer, alerting" },
{ PRI_NOTIFY_TRANSFER_ACTIVE, "Call transfer, active" },
{ PRI_NOTIFY_REMOTE_HOLD, "Remote hold" },
{ PRI_NOTIFY_REMOTE_RETRIEVAL, "Remote retrieval" },
{ PRI_NOTIFY_CALL_DIVERTING, "Call is diverting" },
};
return code2str(info, notifies, sizeof(notifies) / sizeof(notifies[0]));
}
static void dump_notify(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
pri_message(ctrl, "%c Notification indicator (len=%2d): Ext: %d %s (%d)\n", prefix, len, ie->data[0] >> 7, notify2str(ie->data[0] & 0x7f), ie->data[0] & 0x7f);
}
static int receive_notify(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
call->notify = ie->data[0] & 0x7F;
return 0;
}
static int transmit_notify(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
if (call->notify >= 0) {
ie->data[0] = 0x80 | call->notify;
return 3;
}
return 0;
}
static void dump_shift(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
pri_message(ctrl, "%c %sLocking Shift (len=%02d): Requested codeset %d\n", prefix, (full_ie & 8) ? "Non-" : "", len, full_ie & 7);
}
static char *lineinfo2str(int info)
{
/* NAPNA ANI II digits */
static struct msgtype lineinfo[] = {
{ 0, "Plain Old Telephone Service (POTS)" },
{ 1, "Multiparty line (more than 2)" },
{ 2, "ANI failure" },
{ 6, "Station Level Rating" },
{ 7, "Special Operator Handling Required" },
{ 20, "Automatic Identified Outward Dialing (AIOD)" },
{ 23, "Coing or Non-Coin" },
{ 24, "Toll free translated to POTS originated for non-pay station" },
{ 25, "Toll free translated to POTS originated from pay station" },
{ 27, "Pay station with coin control signalling" },
{ 29, "Prison/Inmate Service" },
{ 30, "Intercept (blank)" },
{ 31, "Intercept (trouble)" },
{ 32, "Intercept (regular)" },
{ 34, "Telco Operator Handled Call" },
{ 52, "Outward Wide Area Telecommunications Service (OUTWATS)" },
{ 60, "TRS call from unrestricted line" },
{ 61, "Cellular/Wireless PCS (Type 1)" },
{ 62, "Cellular/Wireless PCS (Type 2)" },
{ 63, "Cellular/Wireless PCS (Roaming)" },
{ 66, "TRS call from hotel/motel" },
{ 67, "TRS call from restricted line" },
{ 70, "Line connected to pay station" },
{ 93, "Private virtual network call" },
};
return code2str(info, lineinfo, sizeof(lineinfo) / sizeof(lineinfo[0]));
}
static void dump_line_information(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
pri_message(ctrl, "%c Originating Line Information (len=%02d): %s (%d)\n", prefix, len, lineinfo2str(ie->data[0]), ie->data[0]);
}
static int receive_line_information(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
call->ani2 = ie->data[0];
return 0;
}
static int transmit_line_information(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
#if 0 /* XXX Is this IE possible for 4ESS only? XXX */
if(ctrl->switchtype == PRI_SWITCH_ATT4ESS) {
ie->data[0] = 0;
return 3;
}
#endif
return 0;
}
static char *gdencoding2str(int encoding)
{
static struct msgtype gdencoding[] = {
{ 0, "BCD even" },
{ 1, "BCD odd" },
{ 2, "IA5" },
{ 3, "Binary" },
};
return code2str(encoding, gdencoding, sizeof(gdencoding) / sizeof(gdencoding[0]));
}
static char *gdtype2str(int type)
{
static struct msgtype gdtype[] = {
{ 0, "Account Code" },
{ 1, "Auth Code" },
{ 2, "Customer ID" },
{ 3, "Universal Access" },
{ 4, "Info Digits" },
{ 5, "Callid" },
{ 6, "Opart" },
{ 7, "TCN" },
{ 9, "Adin" },
};
return code2str(type, gdtype, sizeof(gdtype) / sizeof(gdtype[0]));
}
static void dump_generic_digits(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
int encoding;
int type;
int idx;
int value;
if (len < 3) {
pri_message(ctrl, "%c Generic Digits (len=%02d): Invalid length\n", prefix, len);
return;
}
encoding = (ie->data[0] >> 5) & 7;
type = ie->data[0] & 0x1F;
pri_message(ctrl, "%c Generic Digits (len=%02d): Encoding %s Type %s\n", prefix, len, gdencoding2str(encoding), gdtype2str(type));
if (encoding == 3) { /* Binary */
pri_message(ctrl, "%c Don't know how to handle binary encoding\n");
return;
}
if (len == 3) /* No number information */
return;
pri_message(ctrl, "%c Digits: ");
value = 0;
for(idx = 3; idx < len; ++idx) {
switch(encoding) {
case 0: /* BCD even */
case 1: /* BCD odd */
pri_message(ctrl, "%d", ie->data[idx-2] & 0x0f);
value = value * 10 + (ie->data[idx-2] & 0x0f);
if(!encoding || (idx+1 < len)) { /* Special handling for BCD odd */
pri_message(ctrl, "%d", (ie->data[idx-2] >> 4) & 0x0f);
value = value * 10 + ((ie->data[idx-2] >> 4) & 0x0f);
}
break;
case 2: /* IA5 */
pri_message(ctrl, "%c", ie->data[idx-2]);
value = value * 10 + ie->data[idx-2] - '0';
break;
}
}
switch(type) {
case 4: /* Info Digits */
pri_message(ctrl, " - %s", lineinfo2str(value));
break;
}
pri_message(ctrl, "\n");
}
static int receive_generic_digits(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
int encoding;
int type;
int idx;
int value;
int num_idx;
char number[260];
if (len < 3) {
pri_error(ctrl, "Invalid length of Generic Digits IE\n");
return -1;
}
encoding = (ie->data[0] >> 5) & 7;
type = ie->data[0] & 0x1F;
if (encoding == 3) { /* Binary */
pri_message(ctrl, "!! Unable to handle binary encoded Generic Digits IE\n");
return 0;
}
if (len == 3) /* No number information */
return 0;
value = 0;
switch(type) {
/* Integer value handling */
case 4: /* Info Digits */
for(idx = 3; idx < len; ++idx) {
switch(encoding) {
case 0: /* BCD even */
case 1: /* BCD odd */
value = value * 10 + (ie->data[idx-2] & 0x0f);
if(!encoding || (idx+1 < len)) /* Special handling for BCD odd */
value = value * 10 + ((ie->data[idx-2] >> 4) & 0x0f);
break;
case 2: /* IA5 */
value = value * 10 + (ie->data[idx-2] - '0');
break;
}
}
break;
/* String value handling */
case 5: /* Callid */
num_idx = 0;
for(idx = 3; (idx < len) && (num_idx < sizeof(number) - 4); ++idx) {
switch(encoding) {
case 0: /* BCD even */
case 1: /* BCD odd */
number[num_idx++] = '0' + (ie->data[idx-2] & 0x0f);
if(!encoding || (idx+1 < len)) /* Special handling for BCD odd */
number[num_idx++] = '0' + ((ie->data[idx-2] >> 4) & 0x0f);
break;
case 2:
number[num_idx++] = ie->data[idx-2];
break;
}
}
number[num_idx] = '\0';
break;
}
switch(type) {
case 4: /* Info Digits */
call->ani2 = value;
break;
#if 0
case 5: /* Callid */
if (!call->callernum[0]) {
memcpy(call->callernum, number, sizeof(call->callernum)-1);
call->callerpres = 0;
call->callerplan = 0;
}
break;
#endif
}
return 0;
}
static int transmit_generic_digits(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len, int order)
{
#if 0 /* XXX Is this IE possible for other switches? XXX */
if (order > 1)
return 0;
if(ctrl->switchtype == PRI_SWITCH_NI1) {
ie->data[0] = 0x04; /* BCD even, Info Digits */
ie->data[1] = 0x00; /* POTS */
return 4;
}
#endif
return 0;
}
static char *signal2str(int signal)
{
/* From Q.931 4.5.8 Table 4-24 */
static struct msgtype mtsignal[] = {
{ 0, "Dial tone" },
{ 1, "Ring back tone" },
{ 2, "Intercept tone" },
{ 3, "Network congestion tone" },
{ 4, "Busy tone" },
{ 5, "Confirm tone" },
{ 6, "Answer tone" },
{ 7, "Call waiting tone" },
{ 8, "Off-hook warning tone" },
{ 9, "Pre-emption tone" },
{ 63, "Tones off" },
{ 64, "Alerting on - pattern 0" },
{ 65, "Alerting on - pattern 1" },
{ 66, "Alerting on - pattern 2" },
{ 67, "Alerting on - pattern 3" },
{ 68, "Alerting on - pattern 4" },
{ 69, "Alerting on - pattern 5" },
{ 70, "Alerting on - pattern 6" },
{ 71, "Alerting on - pattern 7" },
{ 79, "Alerting off" },
};
return code2str(signal, mtsignal, sizeof(mtsignal) / sizeof(mtsignal[0]));
}
static void dump_signal(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
pri_message(ctrl, "%c Signal (len=%02d): ", prefix, len);
if (len < 3) {
pri_message(ctrl, "Invalid length\n");
return;
}
pri_message(ctrl, "Signal %s (%d)\n", signal2str(ie->data[0]), ie->data[0]);
}
static void dump_transit_count(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
/* Defined in ECMA-225 */
pri_message(ctrl, "%c Transit Count (len=%02d): ", prefix, len);
if (len < 3) {
pri_message(ctrl, "Invalid length\n");
return;
}
pri_message(ctrl, "Count=%d (0x%02x)\n", ie->data[0] & 0x1f, ie->data[0] & 0x1f);
}
static void dump_reverse_charging_indication(int full_ie, struct pri *ctrl, q931_ie *ie, int len, char prefix)
{
pri_message(ctrl, "%c Reverse Charging Indication (len=%02d): %d\n", prefix, len, ie->data[0] & 0x7);
}
static int receive_reverse_charging_indication(int full_ie, struct pri *ctrl, q931_call *call, int msgtype, q931_ie *ie, int len)
{
call->reversecharge = ie->data[0] & 0x7;
return 0;
}
static struct ie ies[] = {
/* Codeset 0 - Common */
{ 1, NATIONAL_CHANGE_STATUS, "Change Status", dump_change_status, receive_change_status, transmit_change_status },
{ 0, Q931_LOCKING_SHIFT, "Locking Shift", dump_shift },
{ 0, Q931_BEARER_CAPABILITY, "Bearer Capability", dump_bearer_capability, receive_bearer_capability, transmit_bearer_capability },
{ 0, Q931_CAUSE, "Cause", dump_cause, receive_cause, transmit_cause },
{ 1, Q931_CALL_STATE, "Call State", dump_call_state, receive_call_state, transmit_call_state },
{ 0, Q931_CHANNEL_IDENT, "Channel Identification", dump_channel_id, receive_channel_id, transmit_channel_id },
{ 0, Q931_PROGRESS_INDICATOR, "Progress Indicator", dump_progress_indicator, receive_progress_indicator, transmit_progress_indicator },
{ 0, Q931_NETWORK_SPEC_FAC, "Network-Specific Facilities", dump_network_spec_fac, receive_network_spec_fac, transmit_network_spec_fac },
{ 1, Q931_INFORMATION_RATE, "Information Rate" },
{ 1, Q931_TRANSIT_DELAY, "End-to-End Transit Delay" },
{ 1, Q931_TRANS_DELAY_SELECT, "Transmit Delay Selection and Indication" },
{ 1, Q931_BINARY_PARAMETERS, "Packet-layer Binary Parameters" },
{ 1, Q931_WINDOW_SIZE, "Packet-layer Window Size" },
{ 1, Q931_CLOSED_USER_GROUP, "Closed User Group" },
{ 1, Q931_REVERSE_CHARGE_INDIC, "Reverse Charging Indication", dump_reverse_charging_indication, receive_reverse_charging_indication },
{ 1, Q931_CALLING_PARTY_NUMBER, "Calling Party Number", dump_calling_party_number, receive_calling_party_number, transmit_calling_party_number },
{ 1, Q931_CALLING_PARTY_SUBADDR, "Calling Party Subaddress", dump_calling_party_subaddr, receive_calling_party_subaddr },
{ 1, Q931_CALLED_PARTY_NUMBER, "Called Party Number", dump_called_party_number, receive_called_party_number, transmit_called_party_number },
{ 1, Q931_CALLED_PARTY_SUBADDR, "Called Party Subaddress", dump_called_party_subaddr },
{ 0, Q931_REDIRECTING_NUMBER, "Redirecting Number", dump_redirecting_number, receive_redirecting_number, transmit_redirecting_number },
{ 1, Q931_REDIRECTING_SUBADDR, "Redirecting Subaddress", dump_redirecting_subaddr },
{ 0, Q931_TRANSIT_NET_SELECT, "Transit Network Selection" },
{ 1, Q931_RESTART_INDICATOR, "Restart Indicator", dump_restart_indicator, receive_restart_indicator, transmit_restart_indicator },
{ 0, Q931_LOW_LAYER_COMPAT, "Low-layer Compatibility" },
{ 0, Q931_HIGH_LAYER_COMPAT, "High-layer Compatibility" },
{ 1, Q931_PACKET_SIZE, "Packet Size" },
{ 0, Q931_IE_FACILITY, "Facility" , dump_facility, receive_facility, transmit_facility },
{ 1, Q931_IE_REDIRECTION_NUMBER, "Redirection Number" },
{ 1, Q931_IE_REDIRECTION_SUBADDR, "Redirection Subaddress" },
{ 1, Q931_IE_FEATURE_ACTIVATE, "Feature Activation" },
{ 1, Q931_IE_INFO_REQUEST, "Feature Request" },
{ 1, Q931_IE_FEATURE_IND, "Feature Indication" },
{ 1, Q931_IE_SEGMENTED_MSG, "Segmented Message" },
{ 1, Q931_IE_CALL_IDENTITY, "Call Identity", dump_call_identity },
{ 1, Q931_IE_ENDPOINT_ID, "Endpoint Identification" },
{ 1, Q931_IE_NOTIFY_IND, "Notification Indicator", dump_notify, receive_notify, transmit_notify },
{ 1, Q931_DISPLAY, "Display", dump_display, receive_display, transmit_display },
{ 1, Q931_IE_TIME_DATE, "Date/Time", dump_time_date },
{ 1, Q931_IE_KEYPAD_FACILITY, "Keypad Facility", dump_keypad_facility, receive_keypad_facility, transmit_keypad_facility },
{ 0, Q931_IE_SIGNAL, "Signal", dump_signal },
{ 1, Q931_IE_SWITCHHOOK, "Switch-hook" },
{ 1, Q931_IE_USER_USER, "User-User", dump_user_user, receive_user_user, transmit_user_user },
{ 1, Q931_IE_ESCAPE_FOR_EXT, "Escape for Extension" },
{ 1, Q931_IE_CALL_STATUS, "Call Status" },
{ 1, Q931_IE_CHANGE_STATUS, "Change Status", dump_change_status, receive_change_status, transmit_change_status },
{ 1, Q931_IE_CONNECTED_ADDR, "Connected Number", dump_connected_number },
{ 1, Q931_IE_CONNECTED_NUM, "Connected Number", dump_connected_number },
{ 1, Q931_IE_ORIGINAL_CALLED_NUMBER, "Original Called Number", dump_redirecting_number, receive_redirecting_number, transmit_redirecting_number },
{ 1, Q931_IE_USER_USER_FACILITY, "User-User Facility" },
{ 1, Q931_IE_UPDATE, "Update" },
{ 1, Q931_SENDING_COMPLETE, "Sending Complete", dump_sending_complete, receive_sending_complete, transmit_sending_complete },
/* Codeset 4 - Q.SIG specific */
{ 1, QSIG_IE_TRANSIT_COUNT | Q931_CODESET(4), "Transit Count", dump_transit_count },
/* Codeset 6 - Network specific */
{ 1, Q931_IE_ORIGINATING_LINE_INFO, "Originating Line Information", dump_line_information, receive_line_information, transmit_line_information },
{ 1, Q931_IE_FACILITY | Q931_CODESET(6), "Facility", dump_facility, receive_facility, transmit_facility },
{ 1, Q931_DISPLAY | Q931_CODESET(6), "Display (CS6)", dump_display, receive_display, transmit_display },
{ 0, Q931_IE_GENERIC_DIGITS, "Generic Digits", dump_generic_digits, receive_generic_digits, transmit_generic_digits },
/* Codeset 7 */
};
static char *ie2str(int ie)
{
unsigned int x;
/* Special handling for Locking/Non-Locking Shifts */
switch (ie & 0xf8) {
case Q931_LOCKING_SHIFT:
switch (ie & 7) {
case 0:
return "!! INVALID Locking Shift To Codeset 0";
case 1:
return "Locking Shift To Codeset 1";
case 2:
return "Locking Shift To Codeset 2";
case 3:
return "Locking Shift To Codeset 3";
case 4:
return "Locking Shift To Codeset 4";
case 5:
return "Locking Shift To Codeset 5";
case 6:
return "Locking Shift To Codeset 6";
case 7:
return "Locking Shift To Codeset 7";
}
case Q931_NON_LOCKING_SHIFT:
switch (ie & 7) {
case 0:
return "Non-Locking Shift To Codeset 0";
case 1:
return "Non-Locking Shift To Codeset 1";
case 2:
return "Non-Locking Shift To Codeset 2";
case 3:
return "Non-Locking Shift To Codeset 3";
case 4:
return "Non-Locking Shift To Codeset 4";
case 5:
return "Non-Locking Shift To Codeset 5";
case 6:
return "Non-Locking Shift To Codeset 6";
case 7:
return "Non-Locking Shift To Codeset 7";
}
default:
for (x=0;x<sizeof(ies) / sizeof(ies[0]); x++)
if (ie == ies[x].ie)
return ies[x].name;
return "Unknown Information Element";
}
}
static inline unsigned int ielen(q931_ie *ie)
{
if ((ie->ie & 0x80) != 0)
return 1;
else
return 2 + ie->len;
}
static char *msg2str(int msg)
{
unsigned int x;
for (x=0;x<sizeof(msgs) / sizeof(msgs[0]); x++)
if (msgs[x].msgnum == msg)
return msgs[x].name;
return "Unknown Message Type";
}
static char *maintenance_msg2str(int msg)
{
unsigned int x;
for (x=0; x<sizeof(maintenance_msgs)/sizeof(maintenance_msgs[0]); x++) {
if (maintenance_msgs[x].msgnum == msg)
return maintenance_msgs[x].name;
}
return "Unknown Message Type";
}
static inline int q931_cr(q931_h *h)
{
int cr = 0;
int x;
if (h->crlen > 3) {
pri_error(NULL, "Call Reference Length Too long: %d\n", h->crlen);
return -1;
}
switch (h->crlen) {
case 2:
for (x=0;x<h->crlen;x++) {
cr <<= 8;
cr |= h->crv[x];
}
break;
case 1:
cr = h->crv[0];
if (cr & 0x80) {
cr &= ~0x80;
cr |= 0x8000;
}
break;
default:
pri_error(NULL, "Call Reference Length not supported: %d\n", h->crlen);
}
return cr;
}
static inline void q931_dumpie(struct pri *ctrl, int codeset, q931_ie *ie, char prefix)
{
unsigned int x;
int full_ie = Q931_FULL_IE(codeset, ie->ie);
int base_ie;
char *buf = malloc(ielen(ie) * 3 + 1);
int buflen = 0;
buf[0] = '\0';
if (!(ie->ie & 0x80)) {
buflen += sprintf(buf, " %02x", ielen(ie)-2);
for (x = 0; x + 2 < ielen(ie); ++x)
buflen += sprintf(buf + buflen, " %02x", ie->data[x]);
}
pri_message(ctrl, "%c [%02x%s]\n", prefix, ie->ie, buf);
free(buf);
/* Special treatment for shifts */
if((full_ie & 0xf0) == Q931_LOCKING_SHIFT)
full_ie &= 0xff;
base_ie = (((full_ie & ~0x7f) == Q931_FULL_IE(0, 0x80)) && ((full_ie & 0x70) != 0x20)) ? full_ie & ~0x0f : full_ie;
for (x = 0; x < ARRAY_LEN(ies); ++x)
if (ies[x].ie == base_ie) {
if (ies[x].dump)
ies[x].dump(full_ie, ctrl, ie, ielen(ie), prefix);
else
pri_message(ctrl, "%c IE: %s (len = %d)\n", prefix, ies[x].name, ielen(ie));
return;
}
pri_error(ctrl, "!! %c Unknown IE %d (cs%d, len = %d)\n", prefix, Q931_IE_IE(base_ie), Q931_IE_CODESET(base_ie), ielen(ie));
}
static q931_call *q931_getcall(struct pri *ctrl, int cr)
{
q931_call *cur;
q931_call *prev;
struct pri *master;
/* Find the master - He has the call pool */
if (ctrl->master) {
master = ctrl->master;
} else {
master = ctrl;
}
cur = *master->callpool;
prev = NULL;
while (cur) {
if (cur->cr == cr) {
return cur;
}
prev = cur;
cur = cur->next;
}
/* No call exists, make a new one */
if (ctrl->debug & PRI_DEBUG_Q931_STATE) {
pri_message(ctrl, "-- Making new call for cr %d\n", cr);
}
cur = calloc(1, sizeof(*cur));
if (!cur) {
return NULL;
}
/* Initialize call structure. */
cur->cr = cr;
cur->slotmap = -1;
cur->channelno = -1;
cur->newcall = 1;
cur->ourcallstate = Q931_CALL_STATE_NULL;
cur->peercallstate = Q931_CALL_STATE_NULL;
/* PRI is set to whoever called us */
if (ctrl->bri && (ctrl->localtype == PRI_CPE)) {
/*
* Point to the master to avoid stale pointer problems if
* the TEI is removed later.
*/
cur->pri = master;
} else {
cur->pri = ctrl;
}
/* Append to end of list */
if (prev) {
prev->next = cur;
} else {
*master->callpool = cur;
}
return cur;
}
q931_call *q931_new_call(struct pri *ctrl)
{
q931_call *cur;
do {
cur = *ctrl->callpool;
ctrl->cref++;
if (!ctrl->bri) {
if (ctrl->cref > 32767)
ctrl->cref = 1;
} else {
if (ctrl->cref > 127)
ctrl->cref = 1;
}
while(cur) {
if (cur->cr == (0x8000 | ctrl->cref))
break;
cur = cur->next;
}
} while(cur);
return q931_getcall(ctrl, ctrl->cref | 0x8000);
}
static void q931_destroy(struct pri *ctrl, int cr, q931_call *c)
{
q931_call *cur, *prev;
/* For destroying, make sure we are using the master span, since it maintains the call pool */
for (;ctrl->master; ctrl = ctrl->master);
prev = NULL;
cur = *ctrl->callpool;
while(cur) {
if ((c && (cur == c)) || (!c && (cur->cr == cr))) {
if (prev)
prev->next = cur->next;
else
*ctrl->callpool = cur->next;
if (ctrl->debug & PRI_DEBUG_Q931_STATE)
pri_message(ctrl,
"NEW_HANGUP DEBUG: Destroying the call, ourstate %s, peerstate %s\n",
q931_call_state_str(cur->ourcallstate),
q931_call_state_str(cur->peercallstate));
if (cur->retranstimer)
pri_schedule_del(ctrl, cur->retranstimer);
pri_call_apdu_queue_cleanup(cur);
free(cur);
return;
}
prev = cur;
cur = cur->next;
}
pri_error(ctrl, "Can't destroy call %d!\n", cr);
}
static void q931_destroycall(struct pri *ctrl, int cr)
{
q931_destroy(ctrl, cr, NULL);
}
void __q931_destroycall(struct pri *ctrl, q931_call *call)
{
if (ctrl && call) {
q931_destroy(ctrl, 0, call);
}
}
static int add_ie(struct pri *ctrl, q931_call *call, int msgtype, int ie, q931_ie *iet, int maxlen, int *codeset)
{
unsigned int x;
int res, total_res;
int have_shift;
int ies_count, order;
for (x=0;x<sizeof(ies) / sizeof(ies[0]);x++) {
if (ies[x].ie == ie) {
/* This is our baby */
if (ies[x].transmit) {
/* Prepend with CODE SHIFT IE if required */
if (*codeset != Q931_IE_CODESET(ies[x].ie)) {
/* Locking shift to codeset 0 isn't possible */
iet->ie = Q931_IE_CODESET(ies[x].ie) | (Q931_IE_CODESET(ies[x].ie) ? Q931_LOCKING_SHIFT : Q931_NON_LOCKING_SHIFT);
have_shift = 1;
iet = (q931_ie *)((char *)iet + 1);
maxlen--;
}
else
have_shift = 0;
ies_count = ies[x].max_count;
if (ies_count == 0)
ies_count = INT_MAX;
order = 0;
total_res = 0;
do {
iet->ie = ie;
res = ies[x].transmit(ie, ctrl, call, msgtype, iet, maxlen, ++order);
/* Error if res < 0 or ignored if res == 0 */
if (res < 0)
return res;
if (res > 0) {
if ((iet->ie & 0x80) == 0) /* Multibyte IE */
iet->len = res - 2;
total_res += res;
maxlen -= res;
iet = (q931_ie *)((char *)iet + res);
}
} while (res > 0 && order < ies_count);
if (have_shift && total_res) {
if (Q931_IE_CODESET(ies[x].ie))
*codeset = Q931_IE_CODESET(ies[x].ie);
return total_res + 1; /* Shift is single-byte IE */
}
return total_res;
} else {
pri_error(ctrl, "!! Don't know how to add an IE %s (%d)\n", ie2str(ie), ie);
return -1;
}
}
}
pri_error(ctrl, "!! Unknown IE %d (%s)\n", ie, ie2str(ie));
return -1;
}
static char *disc2str(int disc)
{
static struct msgtype discs[] = {
{ Q931_PROTOCOL_DISCRIMINATOR, "Q.931" },
{ GR303_PROTOCOL_DISCRIMINATOR, "GR-303" },
{ 0x3, "AT&T Maintenance" },
{ 0x43, "New AT&T Maintenance" },
};
return code2str(disc, discs, sizeof(discs) / sizeof(discs[0]));
}
void q931_dump(struct pri *ctrl, q931_h *h, int len, int txrx)
{
q931_mh *mh;
char c;
int x=0, r;
int cur_codeset;
int codeset;
int cref;
c = txrx ? '>' : '<';
pri_message(ctrl, "%c Protocol Discriminator: %s (%d) len=%d\n", c, disc2str(h->pd), h->pd, len);
cref = q931_cr(h);
pri_message(ctrl, "%c Call Ref: len=%2d (reference %d/0x%X) (%s)\n",
c, h->crlen, cref & 0x7FFF, cref & 0x7FFF,
(cref & 0x8000) ? "Terminator" : "Originator");
/* Message header begins at the end of the call reference number */
mh = (q931_mh *)(h->contents + h->crlen);
if ((h->pd == MAINTENANCE_PROTOCOL_DISCRIMINATOR_1) || (h->pd == MAINTENANCE_PROTOCOL_DISCRIMINATOR_2)) {
pri_message(ctrl, "%c Message Type: %s (%d)\n", c, maintenance_msg2str(mh->msg), mh->msg);
} else {
pri_message(ctrl, "%c Message Type: %s (%d)\n", c, msg2str(mh->msg), mh->msg);
}
/* Drop length of header, including call reference */
len -= (h->crlen + 3);
codeset = cur_codeset = 0;
while(x < len) {
r = ielen((q931_ie *)(mh->data + x));
q931_dumpie(ctrl, cur_codeset, (q931_ie *)(mh->data + x), c);
switch (mh->data[x] & 0xf8) {
case Q931_LOCKING_SHIFT:
if ((mh->data[x] & 7) > 0)
codeset = cur_codeset = mh->data[x] & 7;
break;
case Q931_NON_LOCKING_SHIFT:
cur_codeset = mh->data[x] & 7;
break;
default:
/* Reset temporary codeset change */
cur_codeset = codeset;
}
x += r;
}
if (x > len)
pri_error(ctrl, "XXX Message longer than it should be?? XXX\n");
}
static int q931_handle_ie(int codeset, struct pri *ctrl, q931_call *c, int msg, q931_ie *ie)
{
unsigned int x;
int full_ie = Q931_FULL_IE(codeset, ie->ie);
if (ctrl->debug & PRI_DEBUG_Q931_STATE)
pri_message(ctrl, "-- Processing IE %d (cs%d, %s)\n", ie->ie, codeset, ie2str(full_ie));
for (x=0;x<sizeof(ies) / sizeof(ies[0]);x++) {
if (full_ie == ies[x].ie) {
if (ies[x].receive)
return ies[x].receive(full_ie, ctrl, c, msg, ie, ielen(ie));
else {
if (ctrl->debug & PRI_DEBUG_Q931_ANOMALY)
pri_error(ctrl, "!! No handler for IE %d (cs%d, %s)\n", ie->ie, codeset, ie2str(full_ie));
return -1;
}
}
}
pri_message(ctrl, "!! Unknown IE %d (cs%d, %s)\n", ie->ie, codeset, ie2str(full_ie));
return -1;
}
/* Returns header and message header and modifies length in place */
static void init_header(struct pri *ctrl, q931_call *call, unsigned char *buf, q931_h **hb, q931_mh **mhb, int *len, int protodisc)
{
q931_h *h = (q931_h *) buf;
q931_mh *mh;
unsigned crv;
if (protodisc) {
h->pd = protodisc;
} else {
h->pd = ctrl->protodisc;
}
h->x0 = 0; /* Reserved 0 */
if (!ctrl->bri) {
/* Two bytes of Call Reference. */
h->crlen = 2;
/* Invert the top bit to make it from our sense */
crv = (unsigned) call->cr;
h->crv[0] = ((crv >> 8) ^ 0x80) & 0xff;
h->crv[1] = crv & 0xff;
if (ctrl->subchannel && !ctrl->bri) {
/* On GR-303, top bit is always 0 */
h->crv[0] &= 0x7f;
}
} else {
h->crlen = 1;
/* Invert the top bit to make it from our sense */
crv = (unsigned) call->cr;
h->crv[0] = (((crv >> 8) ^ 0x80) & 0x80) | (crv & 0x7f);
}
*hb = h;
*len -= 3;/* Protocol discriminator, call reference length, message type id */
*len -= h->crlen;
mh = (q931_mh *) (h->contents + h->crlen);
mh->f = 0;
*mhb = mh;
}
static int q931_xmit(struct pri *ctrl, q931_h *h, int len, int cr)
{
q921_transmit_iframe(ctrl, h, len, cr);
/* The transmit operation might dump the q921 header, so logging the q931
message body after the transmit puts the sections of the message in the
right order in the log */
if (ctrl->debug & PRI_DEBUG_Q931_DUMP)
q931_dump(ctrl, h, len, 1);
#ifdef LIBPRI_COUNTERS
ctrl->q931_txcount++;
#endif
return 0;
}
static int send_message(struct pri *ctrl, q931_call *call, int msgtype, int ies[])
{
unsigned char buf[1024];
q931_h *h;
q931_mh *mh;
int len;
int res;
int offset=0;
int x;
int codeset;
memset(buf, 0, sizeof(buf));
len = sizeof(buf);
init_header(ctrl, call, buf, &h, &mh, &len, (msgtype >> 8));
mh->msg = msgtype & 0x00ff;
x=0;
codeset = 0;
while(ies[x] > -1) {
res = add_ie(ctrl, call, mh->msg, ies[x], (q931_ie *)(mh->data + offset), len, &codeset);
if (res < 0) {
pri_error(ctrl, "!! Unable to add IE '%s'\n", ie2str(ies[x]));
return -1;
}
offset += res;
len -= res;
x++;
}
/* Invert the logic */
len = sizeof(buf) - len;
ctrl = call->pri;
if (ctrl->bri && (ctrl->localtype == PRI_CPE)) {
/*
* Must use the BRI subchannel structure to send with the correct TEI.
* Note: If the subchannel is NULL then there is no TEI assigned and
* we should not be sending anything out at this time.
*/
ctrl = ctrl->subchannel;
}
if (ctrl) {
q931_xmit(ctrl, h, len, 1);
}
call->acked = 1;
return 0;
}
static int maintenance_service_ies[] = { Q931_IE_CHANGE_STATUS, Q931_CHANNEL_IDENT, -1 };
int maintenance_service_ack(struct pri *ctrl, q931_call *c)
{
return send_message(ctrl, c, (MAINTENANCE_PROTOCOL_DISCRIMINATOR_1 << 8) | NATIONAL_SERVICE_ACKNOWLEDGE, maintenance_service_ies);
}
int maintenance_service(struct pri *ctrl, int span, int channel, int changestatus)
{
struct q931_call *c;
c = q931_getcall(ctrl, 0 | 0x8000);
if (!c) {
return -1;
}
if (channel > -1) {
channel &= 0xff;
}
c->ds1no = span;
c->channelno = channel;
c->chanflags |= FLAG_EXCLUSIVE;
c->changestatus = changestatus;
return send_message(ctrl, c, (MAINTENANCE_PROTOCOL_DISCRIMINATOR_1 << 8) | NATIONAL_SERVICE, maintenance_service_ies);
}
static int status_ies[] = { Q931_CAUSE, Q931_CALL_STATE, -1 };
static int q931_status(struct pri *ctrl, q931_call *c, int cause)
{
q931_call *cur = NULL;
if (!cause)
cause = PRI_CAUSE_RESPONSE_TO_STATUS_ENQUIRY;
if (c->cr > -1)
cur = *ctrl->callpool;
while(cur) {
if (cur->cr == c->cr) {
cur->cause=cause;
cur->causecode = CODE_CCITT;
cur->causeloc = LOC_USER;
break;
}
cur = cur->next;
}
if (!cur) {
pri_message(ctrl, "YYY Here we get reset YYY\n");
/* something went wrong, respond with "no such call" */
c->ourcallstate = Q931_CALL_STATE_NULL;
c->peercallstate = Q931_CALL_STATE_NULL;
cur=c;
}
return send_message(ctrl, cur, Q931_STATUS, status_ies);
}
static int information_ies[] = { Q931_IE_KEYPAD_FACILITY, Q931_CALLED_PARTY_NUMBER, -1 };
int q931_information(struct pri *ctrl, q931_call *c, char digit)
{
c->callednum[0] = digit;
c->callednum[1] = '\0';
return send_message(ctrl, c, Q931_INFORMATION, information_ies);
}
static int keypad_facility_ies[] = { Q931_IE_KEYPAD_FACILITY, -1 };
int q931_keypad_facility(struct pri *ctrl, q931_call *call, const char *digits)
{
libpri_copy_string(call->keypad_digits, digits, sizeof(call->keypad_digits));
return send_message(ctrl, call, Q931_INFORMATION, keypad_facility_ies);
}
static int restart_ack_ies[] = { Q931_CHANNEL_IDENT, Q931_RESTART_INDICATOR, -1 };
static int restart_ack(struct pri *ctrl, q931_call *c)
{
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_NULL);
c->peercallstate = Q931_CALL_STATE_NULL;
return send_message(ctrl, c, Q931_RESTART_ACKNOWLEDGE, restart_ack_ies);
}
static int facility_ies[] = { Q931_IE_FACILITY, -1 };
int q931_facility(struct pri*ctrl, q931_call *c)
{
return send_message(ctrl, c, Q931_FACILITY, facility_ies);
}
static int notify_ies[] = { Q931_IE_NOTIFY_IND, -1 };
int q931_notify(struct pri *ctrl, q931_call *c, int channel, int info)
{
if ((ctrl->switchtype == PRI_SWITCH_EUROISDN_T1) || (ctrl->switchtype != PRI_SWITCH_EUROISDN_E1)) {
if ((info > 0x2) || (info < 0x00))
return 0;
}
if (info >= 0)
c->notify = info & 0x7F;
else
c->notify = -1;
return send_message(ctrl, c, Q931_NOTIFY, notify_ies);
}
#ifdef ALERTING_NO_PROGRESS
static int call_progress_ies[] = { -1 };
#else
static int call_progress_with_cause_ies[] = { Q931_PROGRESS_INDICATOR, Q931_CAUSE, -1 };
static int call_progress_ies[] = { Q931_PROGRESS_INDICATOR, -1 };
#endif
int q931_call_progress(struct pri *ctrl, q931_call *c, int channel, int info)
{
if (channel) {
c->ds1no = (channel & 0xff00) >> 8;
c->ds1explicit = (channel & 0x10000) >> 16;
channel &= 0xff;
c->channelno = channel;
}
if (info) {
c->progloc = LOC_PRIV_NET_LOCAL_USER;
c->progcode = CODE_CCITT;
c->progressmask = PRI_PROG_INBAND_AVAILABLE;
} else {
/* PI is mandatory IE for PROGRESS message - Q.931 3.1.8 */
pri_error(ctrl, "XXX Progress message requested but no information is provided\n");
c->progressmask = 0;
}
c->alive = 1;
return send_message(ctrl, c, Q931_PROGRESS, call_progress_ies);
}
int q931_call_progress_with_cause(struct pri *ctrl, q931_call *c, int channel, int info, int cause)
{
if (channel) {
c->ds1no = (channel & 0xff00) >> 8;
c->ds1explicit = (channel & 0x10000) >> 16;
channel &= 0xff;
c->channelno = channel;
}
if (info) {
c->progloc = LOC_PRIV_NET_LOCAL_USER;
c->progcode = CODE_CCITT;
c->progressmask = PRI_PROG_INBAND_AVAILABLE;
} else {
/* PI is mandatory IE for PROGRESS message - Q.931 3.1.8 */
pri_error(ctrl, "XXX Progress message requested but no information is provided\n");
c->progressmask = 0;
}
c->cause = cause;
c->causecode = CODE_CCITT;
c->causeloc = LOC_PRIV_NET_LOCAL_USER;
c->alive = 1;
return send_message(ctrl, c, Q931_PROGRESS, call_progress_with_cause_ies);
}
#ifdef ALERTING_NO_PROGRESS
static int call_proceeding_ies[] = { Q931_CHANNEL_IDENT, -1 };
#else
static int call_proceeding_ies[] = { Q931_CHANNEL_IDENT, Q931_PROGRESS_INDICATOR, -1 };
#endif
int q931_call_proceeding(struct pri *ctrl, q931_call *c, int channel, int info)
{
if (channel) {
c->ds1no = (channel & 0xff00) >> 8;
c->ds1explicit = (channel & 0x10000) >> 16;
channel &= 0xff;
c->channelno = channel;
}
c->chanflags &= ~FLAG_PREFERRED;
c->chanflags |= FLAG_EXCLUSIVE;
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_INCOMING_CALL_PROCEEDING);
c->peercallstate = Q931_CALL_STATE_OUTGOING_CALL_PROCEEDING;
if (info) {
c->progloc = LOC_PRIV_NET_LOCAL_USER;
c->progcode = CODE_CCITT;
c->progressmask = PRI_PROG_INBAND_AVAILABLE;
} else
c->progressmask = 0;
c->proc = 1;
c->alive = 1;
return send_message(ctrl, c, Q931_CALL_PROCEEDING, call_proceeding_ies);
}
#ifndef ALERTING_NO_PROGRESS
static int alerting_ies[] = { Q931_PROGRESS_INDICATOR, Q931_IE_USER_USER, -1 };
#else
static int alerting_ies[] = { -1 };
#endif
int q931_alerting(struct pri *ctrl, q931_call *c, int channel, int info)
{
if (!c->proc)
q931_call_proceeding(ctrl, c, channel, 0);
if (info) {
c->progloc = LOC_PRIV_NET_LOCAL_USER;
c->progcode = CODE_CCITT;
c->progressmask = PRI_PROG_INBAND_AVAILABLE;
} else
c->progressmask = 0;
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_CALL_RECEIVED);
c->peercallstate = Q931_CALL_STATE_CALL_DELIVERED;
c->alive = 1;
return send_message(ctrl, c, Q931_ALERTING, alerting_ies);
}
static int connect_ies[] = { Q931_CHANNEL_IDENT, Q931_PROGRESS_INDICATOR, -1 };
int q931_setup_ack(struct pri *ctrl, q931_call *c, int channel, int nonisdn)
{
if (channel) {
c->ds1no = (channel & 0xff00) >> 8;
c->ds1explicit = (channel & 0x10000) >> 16;
channel &= 0xff;
c->channelno = channel;
}
c->chanflags &= ~FLAG_PREFERRED;
c->chanflags |= FLAG_EXCLUSIVE;
if (nonisdn && (ctrl->switchtype != PRI_SWITCH_DMS100)) {
c->progloc = LOC_PRIV_NET_LOCAL_USER;
c->progcode = CODE_CCITT;
c->progressmask = PRI_PROG_CALLED_NOT_ISDN;
} else
c->progressmask = 0;
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_OVERLAP_RECEIVING);
c->peercallstate = Q931_CALL_STATE_OVERLAP_SENDING;
c->alive = 1;
return send_message(ctrl, c, Q931_SETUP_ACKNOWLEDGE, connect_ies);
}
/* T313 expiry, first time */
static void pri_connect_timeout(void *data)
{
struct q931_call *c = data;
struct pri *ctrl = c->pri;
if (ctrl->debug & PRI_DEBUG_Q931_STATE)
pri_message(ctrl, "Timed out looking for connect acknowledge\n");
q931_disconnect(ctrl, c, PRI_CAUSE_NORMAL_CLEARING);
}
/* T308 expiry, first time */
static void pri_release_timeout(void *data)
{
struct q931_call *c = data;
struct pri *ctrl = c->pri;
if (ctrl->debug & PRI_DEBUG_Q931_STATE)
pri_message(ctrl, "Timed out looking for release complete\n");
c->t308_timedout++;
c->alive = 1;
/* The call to q931_release will re-schedule T308 */
q931_release(ctrl, c, c->cause);
}
/* T308 expiry, second time */
static void pri_release_finaltimeout(void *data)
{
struct q931_call *c = data;
struct pri *ctrl = c->pri;
c->alive = 1;
if (ctrl->debug & PRI_DEBUG_Q931_STATE)
pri_message(ctrl, "Final time-out looking for release complete\n");
c->t308_timedout++;
c->ourcallstate = Q931_CALL_STATE_NULL;
c->peercallstate = Q931_CALL_STATE_NULL;
ctrl->schedev = 1;
ctrl->ev.e = PRI_EVENT_HANGUP_ACK;
ctrl->ev.hangup.channel = c->channelno;
ctrl->ev.hangup.cause = c->cause;
ctrl->ev.hangup.cref = c->cr;
ctrl->ev.hangup.call = c;
ctrl->ev.hangup.aoc_units = c->aoc_units;
libpri_copy_string(ctrl->ev.hangup.useruserinfo, c->useruserinfo, sizeof(ctrl->ev.hangup.useruserinfo));
q931_hangup(ctrl, c, c->cause);
}
/* T305 expiry, first time */
static void pri_disconnect_timeout(void *data)
{
struct q931_call *c = data;
struct pri *ctrl = c->pri;
if (ctrl->debug & PRI_DEBUG_Q931_STATE)
pri_message(ctrl, "Timed out looking for release\n");
c->alive = 1;
q931_release(ctrl, c, PRI_CAUSE_NORMAL_CLEARING);
}
int q931_connect(struct pri *ctrl, q931_call *c, int channel, int nonisdn)
{
if (channel) {
c->ds1no = (channel & 0xff00) >> 8;
c->ds1explicit = (channel & 0x10000) >> 16;
channel &= 0xff;
c->channelno = channel;
}
c->chanflags &= ~FLAG_PREFERRED;
c->chanflags |= FLAG_EXCLUSIVE;
if (nonisdn && (ctrl->switchtype != PRI_SWITCH_DMS100)) {
c->progloc = LOC_PRIV_NET_LOCAL_USER;
c->progcode = CODE_CCITT;
c->progressmask = PRI_PROG_CALLED_NOT_ISDN;
} else
c->progressmask = 0;
if(ctrl->localtype == PRI_NETWORK || ctrl->switchtype == PRI_SWITCH_QSIG)
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_ACTIVE);
else
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_CONNECT_REQUEST);
c->peercallstate = Q931_CALL_STATE_ACTIVE;
c->alive = 1;
/* Connect request timer */
if (c->retranstimer)
pri_schedule_del(ctrl, c->retranstimer);
c->retranstimer = 0;
if ((c->ourcallstate == Q931_CALL_STATE_CONNECT_REQUEST) && (ctrl->bri || (!ctrl->subchannel)))
c->retranstimer = pri_schedule_event(ctrl, ctrl->timers[PRI_TIMER_T313], pri_connect_timeout, c);
return send_message(ctrl, c, Q931_CONNECT, connect_ies);
}
static int release_ies[] = { Q931_CAUSE, Q931_IE_USER_USER, -1 };
int q931_release(struct pri *ctrl, q931_call *c, int cause)
{
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_RELEASE_REQUEST);
/* c->peercallstate stays the same */
if (c->alive) {
c->alive = 0;
c->cause = cause;
c->causecode = CODE_CCITT;
c->causeloc = LOC_PRIV_NET_LOCAL_USER;
if (c->acked) {
if (c->retranstimer)
pri_schedule_del(ctrl, c->retranstimer);
if (!c->t308_timedout) {
c->retranstimer = pri_schedule_event(ctrl, ctrl->timers[PRI_TIMER_T308], pri_release_timeout, c);
} else {
c->retranstimer = pri_schedule_event(ctrl, ctrl->timers[PRI_TIMER_T308], pri_release_finaltimeout, c);
}
return send_message(ctrl, c, Q931_RELEASE, release_ies);
} else
return send_message(ctrl, c, Q931_RELEASE_COMPLETE, release_ies); /* Yes, release_ies, not release_complete_ies */
} else
return 0;
}
static int restart_ies[] = { Q931_CHANNEL_IDENT, Q931_RESTART_INDICATOR, -1 };
int q931_restart(struct pri *ctrl, int channel)
{
struct q931_call *c;
c = q931_getcall(ctrl, 0 | 0x8000);
if (!c)
return -1;
if (!channel)
return -1;
c->ri = 0;
c->ds1no = (channel & 0xff00) >> 8;
c->ds1explicit = (channel & 0x10000) >> 16;
channel &= 0xff;
c->channelno = channel;
c->chanflags &= ~FLAG_PREFERRED;
c->chanflags |= FLAG_EXCLUSIVE;
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_RESTART);
c->peercallstate = Q931_CALL_STATE_RESTART_REQUEST;
return send_message(ctrl, c, Q931_RESTART, restart_ies);
}
static int disconnect_ies[] = { Q931_CAUSE, Q931_IE_USER_USER, -1 };
int q931_disconnect(struct pri *ctrl, q931_call *c, int cause)
{
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_DISCONNECT_REQUEST);
c->peercallstate = Q931_CALL_STATE_DISCONNECT_INDICATION;
if (c->alive) {
c->alive = 0;
c->cause = cause;
c->causecode = CODE_CCITT;
c->causeloc = LOC_PRIV_NET_LOCAL_USER;
c->sendhangupack = 1;
if (c->retranstimer)
pri_schedule_del(ctrl, c->retranstimer);
c->retranstimer = pri_schedule_event(ctrl, ctrl->timers[PRI_TIMER_T305], pri_disconnect_timeout, c);
return send_message(ctrl, c, Q931_DISCONNECT, disconnect_ies);
} else
return 0;
}
static int setup_ies[] = { Q931_BEARER_CAPABILITY, Q931_CHANNEL_IDENT, Q931_IE_FACILITY, Q931_PROGRESS_INDICATOR, Q931_NETWORK_SPEC_FAC, Q931_DISPLAY,
Q931_CALLING_PARTY_NUMBER, Q931_CALLED_PARTY_NUMBER, Q931_REDIRECTING_NUMBER, Q931_IE_USER_USER, Q931_SENDING_COMPLETE,
Q931_IE_ORIGINATING_LINE_INFO, Q931_IE_GENERIC_DIGITS, -1 };
static int gr303_setup_ies[] = { Q931_BEARER_CAPABILITY, Q931_CHANNEL_IDENT, -1 };
static int cis_setup_ies[] = { Q931_BEARER_CAPABILITY, Q931_CHANNEL_IDENT, Q931_IE_FACILITY, Q931_CALLED_PARTY_NUMBER, -1 };
int q931_setup(struct pri *ctrl, q931_call *c, struct pri_sr *req)
{
int res;
c->transcapability = req->transmode;
c->transmoderate = TRANS_MODE_64_CIRCUIT;
if (!req->userl1)
req->userl1 = PRI_LAYER_1_ULAW;
c->userl1 = req->userl1;
c->userl2 = -1;
c->userl3 = -1;
c->ds1no = (req->channel & 0xff00) >> 8;
c->ds1explicit = (req->channel & 0x10000) >> 16;
req->channel &= 0xff;
if ((ctrl->localtype == PRI_CPE) && ctrl->subchannel && !ctrl->bri) {
req->channel = 0;
req->exclusive = 0;
}
c->channelno = req->channel;
c->slotmap = -1;
c->nonisdn = req->nonisdn;
c->newcall = 0;
c->justsignalling = req->justsignalling;
c->complete = req->numcomplete;
if (req->exclusive)
c->chanflags = FLAG_EXCLUSIVE;
else if (c->channelno)
c->chanflags = FLAG_PREFERRED;
if (req->caller) {
libpri_copy_string(c->callernum, req->caller, sizeof(c->callernum));
c->callerplan = req->callerplan;
if (req->callername)
libpri_copy_string(c->callername, req->callername, sizeof(c->callername));
else
c->callername[0] = '\0';
if ((ctrl->switchtype == PRI_SWITCH_DMS100) ||
(ctrl->switchtype == PRI_SWITCH_ATT4ESS)) {
/* Doesn't like certain presentation types */
if (!(req->callerpres & 0x7c))
req->callerpres = PRES_ALLOWED_NETWORK_NUMBER;
}
c->callerpres = req->callerpres;
} else {
c->callernum[0] = '\0';
c->callername[0] = '\0';
c->callerplan = PRI_UNKNOWN;
c->callerpres = PRES_NUMBER_NOT_AVAILABLE;
}
if (req->redirectingnum) {
libpri_copy_string(c->redirectingnum, req->redirectingnum, sizeof(c->redirectingnum));
c->redirectingplan = req->redirectingplan;
if ((ctrl->switchtype == PRI_SWITCH_DMS100) ||
(ctrl->switchtype == PRI_SWITCH_ATT4ESS)) {
/* Doesn't like certain presentation types */
if (!(req->redirectingpres & 0x7c))
req->redirectingpres = PRES_ALLOWED_NETWORK_NUMBER;
}
c->redirectingpres = req->redirectingpres;
c->redirectingreason = req->redirectingreason;
} else {
c->redirectingnum[0] = '\0';
c->redirectingplan = PRI_UNKNOWN;
c->redirectingpres = PRES_NUMBER_NOT_AVAILABLE;
c->redirectingreason = PRI_REDIR_UNKNOWN;
}
if (req->called) {
libpri_copy_string(c->callednum, req->called, sizeof(c->callednum));
c->calledplan = req->calledplan;
} else
return -1;
if (req->useruserinfo)
libpri_copy_string(c->useruserinfo, req->useruserinfo, sizeof(c->useruserinfo));
else
c->useruserinfo[0] = '\0';
if (req->nonisdn && (ctrl->switchtype == PRI_SWITCH_NI2))
c->progressmask = PRI_PROG_CALLER_NOT_ISDN;
else
c->progressmask = 0;
pri_call_add_standard_apdus(ctrl, c);
if (ctrl->subchannel && !ctrl->bri)
res = send_message(ctrl, c, Q931_SETUP, gr303_setup_ies);
else if (c->justsignalling)
res = send_message(ctrl, c, Q931_SETUP, cis_setup_ies);
else
res = send_message(ctrl, c, Q931_SETUP, setup_ies);
if (!res) {
c->alive = 1;
/* make sure we call PRI_EVENT_HANGUP_ACK once we send/receive RELEASE_COMPLETE */
c->sendhangupack = 1;
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_CALL_INITIATED);
c->peercallstate = Q931_CALL_STATE_OVERLAP_SENDING;
}
return res;
}
static int release_complete_ies[] = { Q931_IE_USER_USER, -1 };
static int q931_release_complete(struct pri *ctrl, q931_call *c, int cause)
{
int res = 0;
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_NULL);
c->peercallstate = Q931_CALL_STATE_NULL;
if (cause > -1) {
c->cause = cause;
c->causecode = CODE_CCITT;
c->causeloc = LOC_PRIV_NET_LOCAL_USER;
/* release_ies has CAUSE in it */
res = send_message(ctrl, c, Q931_RELEASE_COMPLETE, release_ies);
} else
res = send_message(ctrl, c, Q931_RELEASE_COMPLETE, release_complete_ies);
c->alive = 0;
/* release the structure */
res += q931_hangup(ctrl,c,cause);
return res;
}
static int connect_acknowledge_ies[] = { -1 };
static int gr303_connect_acknowledge_ies[] = { Q931_CHANNEL_IDENT, -1 };
static int q931_connect_acknowledge(struct pri *ctrl, q931_call *c)
{
if (ctrl->subchannel && !ctrl->bri) {
if (ctrl->localtype == PRI_CPE)
return send_message(ctrl, c, Q931_CONNECT_ACKNOWLEDGE, gr303_connect_acknowledge_ies);
} else
return send_message(ctrl, c, Q931_CONNECT_ACKNOWLEDGE, connect_acknowledge_ies);
return 0;
}
int q931_hangup(struct pri *ctrl, q931_call *c, int cause)
{
int disconnect = 1;
int release_compl = 0;
if (ctrl->debug & PRI_DEBUG_Q931_STATE)
pri_message(ctrl,
"NEW_HANGUP DEBUG: Calling q931_hangup, ourstate %s, peerstate %s\n",
q931_call_state_str(c->ourcallstate),
q931_call_state_str(c->peercallstate));
if (!ctrl || !c)
return -1;
/* If mandatory IE was missing, insist upon that cause code */
if (c->cause == PRI_CAUSE_MANDATORY_IE_MISSING)
cause = c->cause;
if (cause == 34 || cause == 44 || cause == 82 || cause == 1 || cause == 81) {
/* We'll send RELEASE_COMPLETE with these causes */
disconnect = 0;
release_compl = 1;
}
if (cause == 6 || cause == 7 || cause == 26) {
/* We'll send RELEASE with these causes */
disconnect = 0;
}
/* All other causes we send with DISCONNECT */
switch(c->ourcallstate) {
case Q931_CALL_STATE_NULL:
if (c->peercallstate == Q931_CALL_STATE_NULL)
/* free the resources if we receive or send REL_COMPL */
q931_destroycall(ctrl, c->cr);
else if (c->peercallstate == Q931_CALL_STATE_RELEASE_REQUEST)
q931_release_complete(ctrl,c,cause);
break;
case Q931_CALL_STATE_CALL_INITIATED:
/* we sent SETUP */
case Q931_CALL_STATE_OVERLAP_SENDING:
/* received SETUP_ACKNOWLEDGE */
case Q931_CALL_STATE_OUTGOING_CALL_PROCEEDING:
/* received CALL_PROCEEDING */
case Q931_CALL_STATE_CALL_DELIVERED:
/* received ALERTING */
case Q931_CALL_STATE_CALL_PRESENT:
/* received SETUP */
case Q931_CALL_STATE_CALL_RECEIVED:
/* sent ALERTING */
case Q931_CALL_STATE_CONNECT_REQUEST:
/* sent CONNECT */
case Q931_CALL_STATE_INCOMING_CALL_PROCEEDING:
/* we sent CALL_PROCEEDING */
case Q931_CALL_STATE_OVERLAP_RECEIVING:
/* received SETUP_ACKNOWLEDGE */
/* send DISCONNECT in general */
if (c->peercallstate != Q931_CALL_STATE_NULL && c->peercallstate != Q931_CALL_STATE_DISCONNECT_REQUEST && c->peercallstate != Q931_CALL_STATE_DISCONNECT_INDICATION && c->peercallstate != Q931_CALL_STATE_RELEASE_REQUEST && c->peercallstate != Q931_CALL_STATE_RESTART_REQUEST && c->peercallstate != Q931_CALL_STATE_RESTART) {
if (disconnect)
q931_disconnect(ctrl,c,cause);
else if (release_compl)
q931_release_complete(ctrl,c,cause);
else
q931_release(ctrl,c,cause);
} else
pri_error(ctrl,
"Wierd, doing nothing but this shouldn't happen, ourstate %s, peerstate %s\n",
q931_call_state_str(c->ourcallstate),
q931_call_state_str(c->peercallstate));
break;
case Q931_CALL_STATE_ACTIVE:
/* received CONNECT */
q931_disconnect(ctrl,c,cause);
break;
case Q931_CALL_STATE_DISCONNECT_REQUEST:
/* sent DISCONNECT */
q931_release(ctrl,c,cause);
break;
case Q931_CALL_STATE_DISCONNECT_INDICATION:
/* received DISCONNECT */
if (c->peercallstate == Q931_CALL_STATE_DISCONNECT_REQUEST) {
c->alive = 1;
q931_release(ctrl,c,cause);
}
break;
case Q931_CALL_STATE_RELEASE_REQUEST:
/* sent RELEASE */
/* don't do anything, waiting for RELEASE_COMPLETE */
break;
case Q931_CALL_STATE_RESTART:
case Q931_CALL_STATE_RESTART_REQUEST:
/* sent RESTART */
pri_error(ctrl,
"q931_hangup shouldn't be called in this state, ourstate %s, peerstate %s\n",
q931_call_state_str(c->ourcallstate),
q931_call_state_str(c->peercallstate));
break;
default:
pri_error(ctrl,
"We're not yet handling hanging up when our state is %d, contact support@digium.com, ourstate %s, peerstate %s\n",
c->ourcallstate,
q931_call_state_str(c->ourcallstate),
q931_call_state_str(c->peercallstate));
return -1;
}
/* we did handle hangup properly at this point */
return 0;
}
static int prepare_to_handle_maintenance_message(struct pri *ctrl, q931_mh *mh, q931_call *c)
{
if ((!ctrl) || (!mh) || (!c)) {
return -1;
}
/* SERVICE messages are a superset of messages that can take b-channels
* or entire d-channels in and out of service */
switch(mh->msg) {
case NATIONAL_SERVICE:
case NATIONAL_SERVICE_ACKNOWLEDGE:
c->channelno = -1;
c->slotmap = -1;
c->chanflags = 0;
c->ds1no = 0;
c->ri = -1;
c->changestatus = -1;
break;
default:
pri_error(ctrl, "!! Don't know how to pre-handle maintenance message type '%s' (%d)\n", maintenance_msg2str(mh->msg), mh->msg);
return -1;
}
return 0;
}
static int prepare_to_handle_q931_message(struct pri *ctrl, q931_mh *mh, q931_call *c)
{
if ((!ctrl) || (!mh) || (!c)) {
return -1;
}
switch(mh->msg) {
case Q931_RESTART:
if (ctrl->debug & PRI_DEBUG_Q931_STATE)
pri_message(ctrl, "-- Processing Q.931 Restart\n");
/* Reset information */
c->channelno = -1;
c->slotmap = -1;
c->chanflags = 0;
c->ds1no = 0;
c->ri = -1;
break;
case Q931_FACILITY:
c->callername[0] = '\0';
break;
case Q931_SETUP:
if (ctrl->debug & PRI_DEBUG_Q931_STATE)
pri_message(ctrl, "-- Processing Q.931 Call Setup\n");
c->channelno = -1;
c->slotmap = -1;
c->chanflags = 0;
c->ds1no = 0;
c->ri = -1;
c->transcapability = -1;
c->transmoderate = -1;
c->transmultiple = -1;
c->userl1 = -1;
c->userl2 = -1;
c->userl3 = -1;
c->rateadaption = -1;
c->calledplan = -1;
c->callerplan = -1;
c->callerpres = -1;
c->callernum[0] = '\0';
c->callednum[0] = '\0';
c->callername[0] = '\0';
c->callerani[0] = '\0';
c->callerplanani = -1;
c->redirectingplan = -1;
c->redirectingpres = -1;
c->redirectingreason = -1;
c->origcalledplan = -1;
c->origcalledpres = -1;
c->origredirectingreason = -1;
c->redirectingnum[0] = '\0';
c->origcallednum[0] = '\0';
c->redirectingname[0] = '\0';
c->origcalledname[0] = '\0';
c->useruserprotocoldisc = -1;
c->useruserinfo[0] = '\0';
c->complete = 0;
c->nonisdn = 0;
c->aoc_units = -1;
/* Fall through */
case Q931_CONNECT:
case Q931_ALERTING:
case Q931_PROGRESS:
c->useruserinfo[0] = '\0';
c->cause = -1;
/* Fall through */
case Q931_CALL_PROCEEDING:
c->progress = -1;
c->progressmask = 0;
break;
case Q931_CONNECT_ACKNOWLEDGE:
if (c->retranstimer)
pri_schedule_del(ctrl, c->retranstimer);
c->retranstimer = 0;
break;
case Q931_RELEASE:
case Q931_DISCONNECT:
c->cause = -1;
c->causecode = -1;
c->causeloc = -1;
c->aoc_units = -1;
if (c->retranstimer)
pri_schedule_del(ctrl, c->retranstimer);
c->retranstimer = 0;
c->useruserinfo[0] = '\0';
break;
case Q931_RELEASE_COMPLETE:
if (c->retranstimer)
pri_schedule_del(ctrl, c->retranstimer);
c->retranstimer = 0;
c->useruserinfo[0] = '\0';
/* Fall through */
case Q931_STATUS:
c->cause = -1;
c->causecode = -1;
c->causeloc = -1;
c->sugcallstate = -1;
c->aoc_units = -1;
break;
case Q931_RESTART_ACKNOWLEDGE:
c->channelno = -1;
break;
case Q931_INFORMATION:
c->callednum[0] = '\0';
break;
case Q931_STATUS_ENQUIRY:
break;
case Q931_SETUP_ACKNOWLEDGE:
break;
case Q931_NOTIFY:
break;
case Q931_USER_INFORMATION:
case Q931_SEGMENT:
case Q931_CONGESTION_CONTROL:
case Q931_HOLD:
case Q931_HOLD_ACKNOWLEDGE:
case Q931_HOLD_REJECT:
case Q931_RETRIEVE:
case Q931_RETRIEVE_ACKNOWLEDGE:
case Q931_RETRIEVE_REJECT:
case Q931_RESUME:
case Q931_RESUME_ACKNOWLEDGE:
case Q931_RESUME_REJECT:
case Q931_SUSPEND:
case Q931_SUSPEND_ACKNOWLEDGE:
case Q931_SUSPEND_REJECT:
pri_error(ctrl, "!! Not yet handling pre-handle message type %s (%d)\n", msg2str(mh->msg), mh->msg);
/* Fall through */
default:
pri_error(ctrl, "!! Don't know how to pre-handle message type %s (%d)\n", msg2str(mh->msg), mh->msg);
q931_status(ctrl,c, PRI_CAUSE_MESSAGE_TYPE_NONEXIST);
if (c->newcall)
q931_destroycall(ctrl,c->cr);
return -1;
}
return 0;
}
int q931_receive(struct pri *ctrl, q931_h *h, int len)
{
q931_mh *mh;
q931_call *c;
q931_ie *ie;
unsigned int x;
int y;
int res;
int r;
int mandies[MAX_MAND_IES];
int missingmand;
int codeset, cur_codeset;
int last_ie[8];
int cref;
memset(last_ie, 0, sizeof(last_ie));
if (ctrl->debug & PRI_DEBUG_Q931_DUMP)
q931_dump(ctrl, h, len, 0);
#ifdef LIBPRI_COUNTERS
ctrl->q931_rxcount++;
#endif
mh = (q931_mh *)(h->contents + h->crlen);
if ((h->pd != ctrl->protodisc) && (h->pd != MAINTENANCE_PROTOCOL_DISCRIMINATOR_1) && (h->pd != MAINTENANCE_PROTOCOL_DISCRIMINATOR_2)) {
pri_error(ctrl, "Warning: unknown/inappropriate protocol discriminator received (%02x/%d)\n", h->pd, h->pd);
return 0;
}
if (((h->pd == MAINTENANCE_PROTOCOL_DISCRIMINATOR_1) || (h->pd == MAINTENANCE_PROTOCOL_DISCRIMINATOR_2)) && (!ctrl->service_message_support)) {
/* Real service message support has not been enabled (and is OFF in libpri by default),
* so we have to revert to the 'traditional' KLUDGE of changing byte 4 from a 0xf (SERVICE)
* to a 0x7 (SERVICE ACKNOWLEDGE) */
/* This is the weird maintenance stuff. We majorly
KLUDGE this by changing byte 4 from a 0xf (SERVICE)
to a 0x7 (SERVICE ACKNOWLEDGE) */
h->raw[h->crlen + 2] -= 0x8;
q931_xmit(ctrl, h, len, 1);
return 0;
}
cref = q931_cr(h);
c = q931_getcall(ctrl, cref);
if (!c) {
pri_error(ctrl, "Unable to locate call %d\n", cref);
return -1;
}
/* Preliminary handling */
if ((h->pd == MAINTENANCE_PROTOCOL_DISCRIMINATOR_1) || (h->pd == MAINTENANCE_PROTOCOL_DISCRIMINATOR_2)) {
prepare_to_handle_maintenance_message(ctrl, mh, c);
} else {
prepare_to_handle_q931_message(ctrl, mh, c);
}
/* Handle IEs */
memset(mandies, 0, sizeof(mandies));
missingmand = 0;
for (x=0;x<sizeof(msgs) / sizeof(msgs[0]); x++) {
if (msgs[x].msgnum == mh->msg) {
memcpy(mandies, msgs[x].mandies, sizeof(mandies));
}
}
x = 0;
/* Do real IE processing */
len -= (h->crlen + 3);
codeset = cur_codeset = 0;
while(len) {
ie = (q931_ie *)(mh->data + x);
for (y=0;y<MAX_MAND_IES;y++) {
if (mandies[y] == Q931_FULL_IE(cur_codeset, ie->ie))
mandies[y] = 0;
}
r = ielen(ie);
if (r > len) {
pri_error(ctrl, "XXX Message longer than it should be?? XXX\n");
return -1;
}
/* Special processing for codeset shifts */
switch (ie->ie & 0xf8) {
case Q931_LOCKING_SHIFT:
y = ie->ie & 7; /* Requested codeset */
/* Locking shifts couldn't go to lower codeset, and couldn't follows non-locking shifts - verify this */
if ((cur_codeset != codeset) && (ctrl->debug & PRI_DEBUG_Q931_ANOMALY))
pri_message(ctrl, "XXX Locking shift immediately follows non-locking shift (from %d through %d to %d) XXX\n", codeset, cur_codeset, y);
if (y > 0) {
if ((y < codeset) && (ctrl->debug & PRI_DEBUG_Q931_ANOMALY))
pri_error(ctrl, "!! Trying to locked downshift codeset from %d to %d !!\n", codeset, y);
codeset = cur_codeset = y;
}
else {
/* Locking shift to codeset 0 is forbidden by all specifications */
pri_error(ctrl, "!! Invalid locking shift to codeset 0 !!\n");
}
break;
case Q931_NON_LOCKING_SHIFT:
cur_codeset = ie->ie & 7;
break;
default:
/* Sanity check for IE code order */
if (!(ie->ie & 0x80)) {
if (last_ie[cur_codeset] > ie->ie) {
if ((ctrl->debug & PRI_DEBUG_Q931_ANOMALY))
pri_message(ctrl, "XXX Out-of-order IE %d at codeset %d (last was %d)\n", ie->ie, cur_codeset, last_ie[cur_codeset]);
}
else
last_ie[cur_codeset] = ie->ie;
}
/* Ignore non-locking shifts for TR41459-based signalling */
switch (ctrl->switchtype) {
case PRI_SWITCH_LUCENT5E:
case PRI_SWITCH_ATT4ESS:
if (cur_codeset != codeset) {
if ((ctrl->debug & PRI_DEBUG_Q931_DUMP))
pri_message(ctrl, "XXX Ignoring IE %d for temporary codeset %d XXX\n", ie->ie, cur_codeset);
break;
}
/* Fall through */
default:
y = q931_handle_ie(cur_codeset, ctrl, c, mh->msg, ie);
/* XXX Applicable to codeset 0 only? XXX */
if (!cur_codeset && !(ie->ie & 0xf0) && (y < 0))
mandies[MAX_MAND_IES - 1] = Q931_FULL_IE(cur_codeset, ie->ie);
}
/* Reset current codeset */
cur_codeset = codeset;
}
x += r;
len -= r;
}
missingmand = 0;
for (x=0;x<MAX_MAND_IES;x++) {
if (mandies[x]) {
/* check if there is no channel identification when we're configured as network -> that's not an error */
if (((ctrl->localtype != PRI_NETWORK) || (mh->msg != Q931_SETUP) || (mandies[x] != Q931_CHANNEL_IDENT)) &&
((mh->msg != Q931_PROGRESS) || (mandies[x] != Q931_PROGRESS_INDICATOR))) {
pri_error(ctrl, "XXX Missing handling for mandatory IE %d (cs%d, %s) XXX\n", Q931_IE_IE(mandies[x]), Q931_IE_CODESET(mandies[x]), ie2str(mandies[x]));
missingmand++;
}
}
}
/* Post handling */
if ((h->pd == MAINTENANCE_PROTOCOL_DISCRIMINATOR_1) || (h->pd == MAINTENANCE_PROTOCOL_DISCRIMINATOR_2)) {
res = post_handle_maintenance_message(ctrl, mh, c);
} else {
res = post_handle_q931_message(ctrl, mh, c, missingmand);
}
return res;
}
static int post_handle_maintenance_message(struct pri *ctrl, struct q931_mh *mh, struct q931_call *c)
{
/* Do some maintenance stuff */
switch (mh->msg) {
case NATIONAL_SERVICE:
if (c->channelno > 0) {
ctrl->ev.e = PRI_EVENT_SERVICE;
ctrl->ev.service.channel = c->channelno | (c->ds1no << 8);
ctrl->ev.service.changestatus = 0x0f & c->changestatus;
} else {
switch (0x0f & c->changestatus) {
case SERVICE_CHANGE_STATUS_INSERVICE:
ctrl->ev.e = PRI_EVENT_DCHAN_UP;
q921_dchannel_up(ctrl);
break;
case SERVICE_CHANGE_STATUS_OUTOFSERVICE:
ctrl->ev.e = PRI_EVENT_DCHAN_DOWN;
q921_dchannel_down(ctrl);
break;
default:
pri_error(ctrl, "!! Don't know how to handle span service change status '%d'\n", (0x0f & c->changestatus));
return -1;
}
}
maintenance_service_ack(ctrl, c);
return Q931_RES_HAVEEVENT;
case NATIONAL_SERVICE_ACKNOWLEDGE:
if (c->channelno > 0) {
ctrl->ev.e = PRI_EVENT_SERVICE_ACK;
ctrl->ev.service_ack.channel = c->channelno | (c->ds1no << 8);
ctrl->ev.service_ack.changestatus = 0x0f & c->changestatus;
} else {
switch (0x0f & c->changestatus) {
case SERVICE_CHANGE_STATUS_INSERVICE:
ctrl->ev.e = PRI_EVENT_DCHAN_UP;
q921_dchannel_up(ctrl);
break;
case SERVICE_CHANGE_STATUS_OUTOFSERVICE:
ctrl->ev.e = PRI_EVENT_DCHAN_DOWN;
q921_dchannel_down(ctrl);
break;
default:
pri_error(ctrl, "!! Don't know how to handle span service change status '%d'\n", (0x0f & c->changestatus));
return -1;
}
}
return Q931_RES_HAVEEVENT;
default:
pri_error(ctrl, "!! Don't know how to post-handle maintenance message type %s (%d)\n", maintenance_msg2str(mh->msg), mh->msg);
}
return -1;
}
static int post_handle_q931_message(struct pri *ctrl, struct q931_mh *mh, struct q931_call *c, int missingmand)
{
int res;
struct apdu_event *cur = NULL;
switch(mh->msg) {
case Q931_RESTART:
if (missingmand) {
q931_status(ctrl, c, PRI_CAUSE_MANDATORY_IE_MISSING);
q931_destroycall(ctrl, c->cr);
break;
}
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_RESTART);
c->peercallstate = Q931_CALL_STATE_RESTART_REQUEST;
/* Send back the Restart Acknowledge */
restart_ack(ctrl, c);
/* Notify user of restart event */
ctrl->ev.e = PRI_EVENT_RESTART;
ctrl->ev.restart.channel = c->channelno | (c->ds1no << 8) | (c->ds1explicit << 16);
return Q931_RES_HAVEEVENT;
case Q931_SETUP:
if (missingmand) {
q931_release_complete(ctrl, c, PRI_CAUSE_MANDATORY_IE_MISSING);
break;
}
/* Must be new call */
if (!c->newcall) {
break;
}
if (c->progressmask & PRI_PROG_CALLER_NOT_ISDN)
c->nonisdn = 1;
c->newcall = 0;
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_CALL_PRESENT);
c->peercallstate = Q931_CALL_STATE_CALL_INITIATED;
/* it's not yet a call since higher level can respond with RELEASE or RELEASE_COMPLETE */
c->alive = 0;
if (c->transmoderate != TRANS_MODE_64_CIRCUIT) {
q931_release_complete(ctrl, c, PRI_CAUSE_BEARERCAPABILITY_NOTIMPL);
break;
}
ctrl->ev.e = PRI_EVENT_RING;
ctrl->ev.ring.channel = c->channelno | (c->ds1no << 8) | (c->ds1explicit << 16);
ctrl->ev.ring.callingpres = c->callerpres;
ctrl->ev.ring.callingplan = c->callerplan;
ctrl->ev.ring.callingplanani = c->callerplanani;
ctrl->ev.ring.callingplanrdnis = c->redirectingplan;
ctrl->ev.ring.callingplanorigcalled = c->origcalledplan;
ctrl->ev.ring.ani2 = c->ani2;
libpri_copy_string(ctrl->ev.ring.callingani, c->callerani, sizeof(ctrl->ev.ring.callingani));
libpri_copy_string(ctrl->ev.ring.callingnum, c->callernum, sizeof(ctrl->ev.ring.callingnum));
libpri_copy_string(ctrl->ev.ring.callingname, c->callername, sizeof(ctrl->ev.ring.callingname));
ctrl->ev.ring.calledplan = c->calledplan;
libpri_copy_string(ctrl->ev.ring.callingsubaddr, c->callingsubaddr, sizeof(ctrl->ev.ring.callingsubaddr));
libpri_copy_string(ctrl->ev.ring.callednum, c->callednum, sizeof(ctrl->ev.ring.callednum));
libpri_copy_string(ctrl->ev.ring.origcalledname, c->origcalledname, sizeof(ctrl->ev.ring.origcalledname));
libpri_copy_string(ctrl->ev.ring.origcallednum, c->origcallednum, sizeof(ctrl->ev.ring.origcallednum));
libpri_copy_string(ctrl->ev.ring.redirectingnum, c->redirectingnum, sizeof(ctrl->ev.ring.redirectingnum));
libpri_copy_string(ctrl->ev.ring.redirectingname, c->redirectingname, sizeof(ctrl->ev.ring.redirectingname));
libpri_copy_string(ctrl->ev.ring.useruserinfo, c->useruserinfo, sizeof(ctrl->ev.ring.useruserinfo));
c->useruserinfo[0] = '\0';
ctrl->ev.ring.redirectingreason = c->redirectingreason;
ctrl->ev.ring.origredirectingreason = c->origredirectingreason;
ctrl->ev.ring.flexible = ! (c->chanflags & FLAG_EXCLUSIVE);
ctrl->ev.ring.cref = c->cr;
ctrl->ev.ring.call = c;
ctrl->ev.ring.layer1 = c->userl1;
ctrl->ev.ring.complete = c->complete;
ctrl->ev.ring.ctype = c->transcapability;
ctrl->ev.ring.redirectingreason = c->redirectingreason;
ctrl->ev.ring.progress = c->progress;
ctrl->ev.ring.progressmask = c->progressmask;
ctrl->ev.ring.reversecharge = c->reversecharge;
return Q931_RES_HAVEEVENT;
case Q931_ALERTING:
if (c->newcall) {
q931_release_complete(ctrl,c,PRI_CAUSE_INVALID_CALL_REFERENCE);
break;
}
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_CALL_DELIVERED);
c->peercallstate = Q931_CALL_STATE_CALL_RECEIVED;
ctrl->ev.e = PRI_EVENT_RINGING;
ctrl->ev.ringing.channel = c->channelno | (c->ds1no << 8) | (c->ds1explicit << 16);
ctrl->ev.ringing.cref = c->cr;
ctrl->ev.ringing.call = c;
ctrl->ev.ringing.progress = c->progress;
ctrl->ev.ringing.progressmask = c->progressmask;
libpri_copy_string(ctrl->ev.ringing.useruserinfo, c->useruserinfo, sizeof(ctrl->ev.ringing.useruserinfo));
c->useruserinfo[0] = '\0';
cur = c->apdus;
while (cur) {
if (!cur->sent && cur->message == Q931_FACILITY) {
q931_facility(ctrl, c);
break;
}
cur = cur->next;
}
return Q931_RES_HAVEEVENT;
case Q931_CONNECT:
if (c->newcall) {
q931_release_complete(ctrl,c,PRI_CAUSE_INVALID_CALL_REFERENCE);
break;
}
if (c->ourcallstate == Q931_CALL_STATE_ACTIVE) {
q931_status(ctrl, c, PRI_CAUSE_WRONG_MESSAGE);
break;
}
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_ACTIVE);
c->peercallstate = Q931_CALL_STATE_CONNECT_REQUEST;
ctrl->ev.e = PRI_EVENT_ANSWER;
ctrl->ev.answer.channel = c->channelno | (c->ds1no << 8) | (c->ds1explicit << 16);
ctrl->ev.answer.cref = c->cr;
ctrl->ev.answer.call = c;
ctrl->ev.answer.progress = c->progress;
ctrl->ev.answer.progressmask = c->progressmask;
libpri_copy_string(ctrl->ev.answer.useruserinfo, c->useruserinfo, sizeof(ctrl->ev.answer.useruserinfo));
c->useruserinfo[0] = '\0';
q931_connect_acknowledge(ctrl, c);
if (c->justsignalling) { /* Make sure WE release when we initiatie a signalling only connection */
q931_release(ctrl, c, PRI_CAUSE_NORMAL_CLEARING);
break;
} else
return Q931_RES_HAVEEVENT;
case Q931_FACILITY:
if (c->newcall) {
q931_release_complete(ctrl,c,PRI_CAUSE_INVALID_CALL_REFERENCE);
break;
}
ctrl->ev.e = PRI_EVENT_FACNAME;
libpri_copy_string(ctrl->ev.facname.callingname, c->callername, sizeof(ctrl->ev.facname.callingname));
libpri_copy_string(ctrl->ev.facname.callingnum, c->callernum, sizeof(ctrl->ev.facname.callingnum));
ctrl->ev.facname.channel = c->channelno | (c->ds1no << 8) | (c->ds1explicit << 16);
ctrl->ev.facname.callingpres = c->callerpres;
ctrl->ev.facname.callingplan = c->callerplan;
ctrl->ev.facname.cref = c->cr;
ctrl->ev.facname.call = c;
#if 0
pri_message(ctrl, "Sending facility event (%s/%s)\n", ctrl->ev.facname.callingname, ctrl->ev.facname.callingnum);
#endif
return Q931_RES_HAVEEVENT;
case Q931_PROGRESS:
if (missingmand) {
q931_status(ctrl, c, PRI_CAUSE_MANDATORY_IE_MISSING);
q931_destroycall(ctrl, c->cr);
break;
}
ctrl->ev.e = PRI_EVENT_PROGRESS;
ctrl->ev.proceeding.cause = c->cause;
/* Fall through */
case Q931_CALL_PROCEEDING:
if (c->newcall) {
q931_release_complete(ctrl,c,PRI_CAUSE_INVALID_CALL_REFERENCE);
break;
}
if ((c->ourcallstate != Q931_CALL_STATE_CALL_INITIATED) &&
(c->ourcallstate != Q931_CALL_STATE_OVERLAP_SENDING) &&
(c->ourcallstate != Q931_CALL_STATE_CALL_DELIVERED) &&
(c->ourcallstate != Q931_CALL_STATE_OUTGOING_CALL_PROCEEDING)) {
q931_status(ctrl,c,PRI_CAUSE_WRONG_MESSAGE);
break;
}
ctrl->ev.proceeding.channel = c->channelno | (c->ds1no << 8) | (c->ds1explicit << 16);
if (mh->msg == Q931_CALL_PROCEEDING) {
ctrl->ev.e = PRI_EVENT_PROCEEDING;
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_OUTGOING_CALL_PROCEEDING);
c->peercallstate = Q931_CALL_STATE_INCOMING_CALL_PROCEEDING;
}
ctrl->ev.proceeding.progress = c->progress;
ctrl->ev.proceeding.progressmask = c->progressmask;
ctrl->ev.proceeding.cref = c->cr;
ctrl->ev.proceeding.call = c;
cur = c->apdus;
while (cur) {
if (!cur->sent && cur->message == Q931_FACILITY) {
q931_facility(ctrl, c);
break;
}
cur = cur->next;
}
return Q931_RES_HAVEEVENT;
case Q931_CONNECT_ACKNOWLEDGE:
if (c->newcall) {
q931_release_complete(ctrl,c,PRI_CAUSE_INVALID_CALL_REFERENCE);
break;
}
if (!(c->ourcallstate == Q931_CALL_STATE_CONNECT_REQUEST) &&
!(c->ourcallstate == Q931_CALL_STATE_ACTIVE &&
(ctrl->localtype == PRI_NETWORK || ctrl->switchtype == PRI_SWITCH_QSIG))) {
q931_status(ctrl,c,PRI_CAUSE_WRONG_MESSAGE);
break;
}
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_ACTIVE);
c->peercallstate = Q931_CALL_STATE_ACTIVE;
break;
case Q931_STATUS:
if (missingmand) {
q931_status(ctrl, c, PRI_CAUSE_MANDATORY_IE_MISSING);
q931_destroycall(ctrl, c->cr);
break;
}
if (c->newcall) {
if (c->cr & 0x7fff)
q931_release_complete(ctrl,c,PRI_CAUSE_WRONG_CALL_STATE);
break;
}
/* Do nothing */
/* Also when the STATUS asks for the call of an unexisting reference send RELEASE_COMPL */
if ((ctrl->debug & PRI_DEBUG_Q931_ANOMALY) &&
(c->cause != PRI_CAUSE_INTERWORKING))
pri_error(ctrl, "Received unsolicited status: %s\n", pri_cause2str(c->cause));
/* Workaround for S-12 ver 7.3 - it responds for invalid/non-implemented IEs at SETUP with null call state */
#if 0
if (!c->sugcallstate && (c->ourcallstate != Q931_CALL_STATE_CALL_INITIATED)) {
#else
/* Remove "workaround" since it breaks certification testing. If we receive a STATUS message of call state
* NULL and we are not in the call state NULL we must clear resources and return to the call state to pass
* testing. See section 5.8.11 of Q.931 */
if (!c->sugcallstate) {
#endif
ctrl->ev.hangup.channel = c->channelno | (c->ds1no << 8) | (c->ds1explicit << 16);
ctrl->ev.hangup.cause = c->cause;
ctrl->ev.hangup.cref = c->cr;
ctrl->ev.hangup.call = c;
ctrl->ev.hangup.aoc_units = c->aoc_units;
libpri_copy_string(ctrl->ev.hangup.useruserinfo, c->useruserinfo, sizeof(ctrl->ev.hangup.useruserinfo));
/* Free resources */
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_NULL);
c->peercallstate = Q931_CALL_STATE_NULL;
if (c->alive) {
ctrl->ev.e = PRI_EVENT_HANGUP;
res = Q931_RES_HAVEEVENT;
c->alive = 0;
} else if (c->sendhangupack) {
res = Q931_RES_HAVEEVENT;
ctrl->ev.e = PRI_EVENT_HANGUP_ACK;
q931_hangup(ctrl, c, c->cause);
} else {
q931_hangup(ctrl, c, c->cause);
res = 0;
}
if (res)
return res;
}
break;
case Q931_RELEASE_COMPLETE:
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_NULL);
c->peercallstate = Q931_CALL_STATE_NULL;
ctrl->ev.hangup.channel = c->channelno | (c->ds1no << 8) | (c->ds1explicit << 16);
ctrl->ev.hangup.cause = c->cause;
ctrl->ev.hangup.cref = c->cr;
ctrl->ev.hangup.call = c;
ctrl->ev.hangup.aoc_units = c->aoc_units;
libpri_copy_string(ctrl->ev.hangup.useruserinfo, c->useruserinfo, sizeof(ctrl->ev.hangup.useruserinfo));
c->useruserinfo[0] = '\0';
/* Free resources */
if (c->alive) {
ctrl->ev.e = PRI_EVENT_HANGUP;
res = Q931_RES_HAVEEVENT;
c->alive = 0;
} else if (c->sendhangupack) {
res = Q931_RES_HAVEEVENT;
ctrl->ev.e = PRI_EVENT_HANGUP_ACK;
pri_hangup(ctrl, c, c->cause);
} else
res = 0;
if (res)
return res;
else
q931_hangup(ctrl,c,c->cause);
break;
case Q931_RELEASE:
if (missingmand) {
/* Force cause to be mandatory IE missing */
c->cause = PRI_CAUSE_MANDATORY_IE_MISSING;
}
if (c->ourcallstate == Q931_CALL_STATE_RELEASE_REQUEST)
c->peercallstate = Q931_CALL_STATE_NULL;
else {
c->peercallstate = Q931_CALL_STATE_RELEASE_REQUEST;
}
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_NULL);
ctrl->ev.e = PRI_EVENT_HANGUP;
ctrl->ev.hangup.channel = c->channelno | (c->ds1no << 8) | (c->ds1explicit << 16);
ctrl->ev.hangup.cause = c->cause;
ctrl->ev.hangup.cref = c->cr;
ctrl->ev.hangup.call = c;
ctrl->ev.hangup.aoc_units = c->aoc_units;
libpri_copy_string(ctrl->ev.hangup.useruserinfo, c->useruserinfo, sizeof(ctrl->ev.hangup.useruserinfo));
c->useruserinfo[0] = '\0';
/* Don't send release complete if they send us release
while we sent it, assume a NULL state */
if (c->newcall)
q931_release_complete(ctrl,c,PRI_CAUSE_INVALID_CALL_REFERENCE);
else
return Q931_RES_HAVEEVENT;
break;
case Q931_DISCONNECT:
if (missingmand) {
/* Still let user call release */
c->cause = PRI_CAUSE_MANDATORY_IE_MISSING;
}
if (c->newcall) {
q931_release_complete(ctrl,c,PRI_CAUSE_INVALID_CALL_REFERENCE);
break;
}
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_DISCONNECT_INDICATION);
c->peercallstate = Q931_CALL_STATE_DISCONNECT_REQUEST;
c->sendhangupack = 1;
/* wait for a RELEASE so that sufficient time has passed
for the inband audio to be heard */
if (ctrl->acceptinbanddisconnect && (c->progressmask & PRI_PROG_INBAND_AVAILABLE))
break;
/* Return such an event */
ctrl->ev.e = PRI_EVENT_HANGUP_REQ;
ctrl->ev.hangup.channel = c->channelno | (c->ds1no << 8) | (c->ds1explicit << 16);
ctrl->ev.hangup.cause = c->cause;
ctrl->ev.hangup.cref = c->cr;
ctrl->ev.hangup.call = c;
ctrl->ev.hangup.aoc_units = c->aoc_units;
libpri_copy_string(ctrl->ev.hangup.useruserinfo, c->useruserinfo, sizeof(ctrl->ev.hangup.useruserinfo));
c->useruserinfo[0] = '\0';
if (c->alive)
return Q931_RES_HAVEEVENT;
else
q931_hangup(ctrl,c,c->cause);
break;
case Q931_RESTART_ACKNOWLEDGE:
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_NULL);
c->peercallstate = Q931_CALL_STATE_NULL;
ctrl->ev.e = PRI_EVENT_RESTART_ACK;
ctrl->ev.restartack.channel = c->channelno | (c->ds1no << 8) | (c->ds1explicit << 16);
return Q931_RES_HAVEEVENT;
case Q931_INFORMATION:
/* XXX We're handling only INFORMATION messages that contain
overlap dialing received digit
+ the "Complete" msg which is basically an EOF on further digits
XXX */
if (c->newcall) {
q931_release_complete(ctrl,c,PRI_CAUSE_INVALID_CALL_REFERENCE);
break;
}
if (c->ourcallstate != Q931_CALL_STATE_OVERLAP_RECEIVING) {
ctrl->ev.e = PRI_EVENT_KEYPAD_DIGIT;
ctrl->ev.digit.call = c;
ctrl->ev.digit.channel = c->channelno | (c->ds1no << 8);
libpri_copy_string(ctrl->ev.digit.digits, c->keypad_digits, sizeof(ctrl->ev.digit.digits));
/* Make sure we clear it out before we return */
c->keypad_digits[0] = '\0';
return Q931_RES_HAVEEVENT;
}
ctrl->ev.e = PRI_EVENT_INFO_RECEIVED;
ctrl->ev.ring.call = c;
ctrl->ev.ring.channel = c->channelno | (c->ds1no << 8) | (c->ds1explicit << 16);
libpri_copy_string(ctrl->ev.ring.callednum, c->callednum, sizeof(ctrl->ev.ring.callednum));
libpri_copy_string(ctrl->ev.ring.callingsubaddr, c->callingsubaddr, sizeof(ctrl->ev.ring.callingsubaddr));
ctrl->ev.ring.complete = c->complete; /* this covers IE 33 (Sending Complete) */
return Q931_RES_HAVEEVENT;
case Q931_STATUS_ENQUIRY:
if (c->newcall) {
q931_release_complete(ctrl, c, PRI_CAUSE_INVALID_CALL_REFERENCE);
} else
q931_status(ctrl,c, 0);
break;
case Q931_SETUP_ACKNOWLEDGE:
if (c->newcall) {
q931_release_complete(ctrl,c,PRI_CAUSE_INVALID_CALL_REFERENCE);
break;
}
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_OVERLAP_SENDING);
c->peercallstate = Q931_CALL_STATE_OVERLAP_RECEIVING;
ctrl->ev.e = PRI_EVENT_SETUP_ACK;
ctrl->ev.setup_ack.channel = c->channelno | (c->ds1no << 8) | (c->ds1explicit << 16);
ctrl->ev.setup_ack.call = c;
cur = c->apdus;
while (cur) {
if (!cur->sent && cur->message == Q931_FACILITY) {
q931_facility(ctrl, c);
break;
}
cur = cur->next;
}
return Q931_RES_HAVEEVENT;
case Q931_NOTIFY:
ctrl->ev.e = PRI_EVENT_NOTIFY;
ctrl->ev.notify.channel = c->channelno;
ctrl->ev.notify.info = c->notify;
return Q931_RES_HAVEEVENT;
case Q931_USER_INFORMATION:
case Q931_SEGMENT:
case Q931_CONGESTION_CONTROL:
case Q931_HOLD:
case Q931_HOLD_ACKNOWLEDGE:
case Q931_HOLD_REJECT:
case Q931_RETRIEVE:
case Q931_RETRIEVE_ACKNOWLEDGE:
case Q931_RETRIEVE_REJECT:
case Q931_RESUME:
case Q931_RESUME_ACKNOWLEDGE:
case Q931_RESUME_REJECT:
case Q931_SUSPEND:
case Q931_SUSPEND_ACKNOWLEDGE:
case Q931_SUSPEND_REJECT:
pri_error(ctrl, "!! Not yet handling post-handle message type %s (%d)\n", msg2str(mh->msg), mh->msg);
/* Fall through */
default:
pri_error(ctrl, "!! Don't know how to post-handle message type %s (%d)\n", msg2str(mh->msg), mh->msg);
q931_status(ctrl,c, PRI_CAUSE_MESSAGE_TYPE_NONEXIST);
if (c->newcall)
q931_destroycall(ctrl,c->cr);
return -1;
}
return 0;
}
/* Clear a call, although we did not receive any hangup notification. */
static int pri_internal_clear(void *data)
{
struct q931_call *c = data;
struct pri *ctrl = c->pri;
int res;
if (c->retranstimer)
pri_schedule_del(ctrl, c->retranstimer);
c->retranstimer = 0;
c->useruserinfo[0] = '\0';
c->cause = -1;
c->causecode = -1;
c->causeloc = -1;
c->sugcallstate = -1;
c->aoc_units = -1;
UPDATE_OURCALLSTATE(ctrl, c, Q931_CALL_STATE_NULL);
c->peercallstate = Q931_CALL_STATE_NULL;
ctrl->ev.hangup.channel = c->channelno | (c->ds1no << 8) | (c->ds1explicit << 16);
ctrl->ev.hangup.cause = c->cause;
ctrl->ev.hangup.cref = c->cr;
ctrl->ev.hangup.call = c;
ctrl->ev.hangup.aoc_units = c->aoc_units;
libpri_copy_string(ctrl->ev.hangup.useruserinfo, c->useruserinfo, sizeof(ctrl->ev.hangup.useruserinfo));
/* Free resources */
if (c->alive) {
ctrl->ev.e = PRI_EVENT_HANGUP;
res = Q931_RES_HAVEEVENT;
c->alive = 0;
} else if (c->sendhangupack) {
res = Q931_RES_HAVEEVENT;
ctrl->ev.e = PRI_EVENT_HANGUP_ACK;
q931_hangup(ctrl, c, c->cause);
} else {
res = 0;
q931_hangup(ctrl, c, c->cause);
}
return res;
}
/* Handle T309 timeout for an active call. */
static void pri_dl_down_timeout(void *data)
{
struct q931_call *c = data;
struct pri *ctrl = c->pri;
if (ctrl->debug & PRI_DEBUG_Q931_STATE)
pri_message(ctrl, DBGHEAD "Timed out waiting for data link re-establishment\n", DBGINFO);
c->cause = PRI_CAUSE_DESTINATION_OUT_OF_ORDER;
if (pri_internal_clear(c) == Q931_RES_HAVEEVENT)
ctrl->schedev = 1;
}
/* Handle Layer 2 down event for a non active call. */
static void pri_dl_down_cancelcall(void *data)
{
struct q931_call *c = data;
struct pri *ctrl = c->pri;
if (ctrl->debug & PRI_DEBUG_Q931_STATE)
pri_message(ctrl, DBGHEAD "Cancel non active call after data link failure\n", DBGINFO);
c->cause = PRI_CAUSE_DESTINATION_OUT_OF_ORDER;
if (pri_internal_clear(c) == Q931_RES_HAVEEVENT)
ctrl->schedev = 1;
}
/* Receive an indication from Layer 2 */
void q931_dl_indication(struct pri *ctrl, int event)
{
q931_call *cur = NULL;
/* Just return if T309 is not enabled. */
if (!ctrl || ctrl->timers[PRI_TIMER_T309] < 0)
return;
switch (event) {
case PRI_EVENT_DCHAN_DOWN:
pri_message(ctrl, DBGHEAD "link is DOWN\n", DBGINFO);
cur = *ctrl->callpool;
while(cur) {
if (cur->ourcallstate == Q931_CALL_STATE_ACTIVE) {
/* For a call in Active state, activate T309 only if there is no timer already running. */
if (!cur->retranstimer) {
pri_message(ctrl, DBGHEAD "activate T309 for call %d on channel %d\n", DBGINFO, cur->cr, cur->channelno);
cur->retranstimer = pri_schedule_event(ctrl, ctrl->timers[PRI_TIMER_T309], pri_dl_down_timeout, cur);
}
} else if (cur->ourcallstate != Q931_CALL_STATE_NULL) {
/* For a call that is not in Active state, schedule internal clearing of the call 'ASAP' (delay 0). */
pri_message(ctrl, DBGHEAD "cancel call %d on channel %d in state %d (%s)\n", DBGINFO,
cur->cr, cur->channelno, cur->ourcallstate,
q931_call_state_str(cur->ourcallstate));
if (cur->retranstimer)
pri_schedule_del(ctrl, cur->retranstimer);
cur->retranstimer = pri_schedule_event(ctrl, 0, pri_dl_down_cancelcall, cur);
}
cur = cur->next;
}
break;
case PRI_EVENT_DCHAN_UP:
pri_message(ctrl, DBGHEAD "link is UP\n", DBGINFO);
cur = *ctrl->callpool;
while(cur) {
if (cur->ourcallstate == Q931_CALL_STATE_ACTIVE && cur->retranstimer) {
pri_message(ctrl, DBGHEAD "cancel T309 for call %d on channel %d\n", DBGINFO, cur->cr, cur->channelno);
pri_schedule_del(ctrl, cur->retranstimer);
cur->retranstimer = 0;
q931_status(ctrl, cur, PRI_CAUSE_NORMAL_UNSPECIFIED);
} else if (cur->ourcallstate != Q931_CALL_STATE_NULL &&
cur->ourcallstate != Q931_CALL_STATE_DISCONNECT_REQUEST &&
cur->ourcallstate != Q931_CALL_STATE_DISCONNECT_INDICATION &&
cur->ourcallstate != Q931_CALL_STATE_RELEASE_REQUEST) {
/* The STATUS message sent here is not required by Q.931, but it may help anyway. */
q931_status(ctrl, cur, PRI_CAUSE_NORMAL_UNSPECIFIED);
}
cur = cur->next;
}
break;
default:
pri_message(ctrl, DBGHEAD "unexpected event %d.\n", DBGINFO, event);
}
}
int q931_call_getcrv(struct pri *ctrl, q931_call *call, int *callmode)
{
if (callmode)
*callmode = call->cr & 0x7;
return ((call->cr & 0x7fff) >> 3);
}
int q931_call_setcrv(struct pri *ctrl, q931_call *call, int crv, int callmode)
{
call->cr = (crv << 3) & 0x7fff;
call->cr |= (callmode & 0x7);
return 0;
}
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