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Add SERVICE message support for the 'national' switchtype

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This set of changes integrates SERVICE message support for the 
'national' switchtype.  The 'national' switchtype uses the 0x43
protocol discriminator.  The 'national' SERVICE/SERVICE ACKNOWLEDGE
and AT&T SERVICE/SERVICE ACKNOWLEDGE message values are opposite
of each other.  This is handled by first determining which
protocol discriminator is in use, then responding with the appropriate
SERVICE ACKNOWLEDGE value.  AT&T SERVICE messages use the
0x3 protocol discriminator.

(closes issue #15803)
Reported by: dhubbard

Review: https://reviewboard.asterisk.org/r/347/


git-svn-id: https://origsvn.digium.com/svn/libpri/branches/1.4@1072 2fbb986a-6c06-0410-b554-c9c1f0a7f128
This commit is contained in:
Dwayne M. Hubbard 2009-09-13 22:54:10 +00:00
parent c3074dafc1
commit d9af5b25ce
2 changed files with 63 additions and 24 deletions
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8
pri_q931.h
View File

@ -75,7 +75,9 @@ typedef struct q931_ie {
#define Q931_PROTOCOL_DISCRIMINATOR 0x08
#define GR303_PROTOCOL_DISCRIMINATOR 0x4f
/* AT&T Maintenance Protocol Discriminator */
#define MAINTENANCE_PROTOCOL_DISCRIMINATOR_1 0x03
/* National Maintenance Protocol Discriminator */
#define MAINTENANCE_PROTOCOL_DISCRIMINATOR_2 0x43
/* Q.931 / National ISDN Message Types */
@ -121,8 +123,10 @@ typedef struct q931_ie {
#define Q931_SUSPEND_REJECT 0x21
/* Maintenance messages (codeset 0 only) */
#define NATIONAL_SERVICE 0x0f
#define NATIONAL_SERVICE_ACKNOWLEDGE 0x07
#define ATT_SERVICE 0x0f
#define ATT_SERVICE_ACKNOWLEDGE 0x07
#define NATIONAL_SERVICE 0x07
#define NATIONAL_SERVICE_ACKNOWLEDGE 0x0f
#define SERVICE_CHANGE_STATUS_INSERVICE 0
#define SERVICE_CHANGE_STATUS_LOOPBACK 1 /* not supported */

75
q931.c
View File

@ -93,11 +93,16 @@ static struct msgtype msgs[] = {
};
static int post_handle_q931_message(struct pri *ctrl, struct q931_mh *mh, struct q931_call *c, int missingmand);
struct msgtype maintenance_msgs[] = {
struct msgtype att_maintenance_msgs[] = {
{ ATT_SERVICE, "SERVICE", { Q931_CHANNEL_IDENT } },
{ ATT_SERVICE_ACKNOWLEDGE, "SERVICE ACKNOWLEDGE", { Q931_CHANNEL_IDENT } },
};
struct msgtype national_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 int post_handle_maintenance_message(struct pri *ctrl, int protodisc, struct q931_mh *mh, struct q931_call *c);
static struct msgtype causes[] = {
{ PRI_CAUSE_UNALLOCATED, "Unallocated (unassigned) number" },
@ -2915,12 +2920,23 @@ static char *msg2str(int msg)
return "Unknown Message Type";
}
static char *maintenance_msg2str(int msg)
static char *maintenance_msg2str(int msg, int pd)
{
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;
unsigned int x, max;
struct msgtype *m = NULL;
if (pd == MAINTENANCE_PROTOCOL_DISCRIMINATOR_1) {
m = att_maintenance_msgs;
max = ARRAY_LEN(att_maintenance_msgs);
} else {
m = national_maintenance_msgs;
max = ARRAY_LEN(national_maintenance_msgs);
}
for (x = 0; x < max; x++) {
if (m[x].msgnum == msg) {
return m[x].name;
}
}
return "Unknown Message Type";
}
@ -3225,7 +3241,7 @@ void q931_dump(struct pri *ctrl, q931_h *h, int len, int txrx)
/* 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);
pri_message(ctrl, "%c Message Type: %s (%d)\n", c, maintenance_msg2str(mh->msg, h->pd), mh->msg);
} else {
pri_message(ctrl, "%c Message Type: %s (%d)\n", c, msg2str(mh->msg), mh->msg);
}
@ -3394,12 +3410,21 @@ static int maintenance_service_ies[] = { Q931_IE_CHANGE_STATUS, Q931_CHANNEL_IDE
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 pd = MAINTENANCE_PROTOCOL_DISCRIMINATOR_1;
int mt = ATT_SERVICE_ACKNOWLEDGE;
if (ctrl->switchtype == PRI_SWITCH_NI2) {
pd = MAINTENANCE_PROTOCOL_DISCRIMINATOR_2;
mt = NATIONAL_SERVICE_ACKNOWLEDGE;
}
return send_message(ctrl, c, (pd << 8) | mt, maintenance_service_ies);
}
int maintenance_service(struct pri *ctrl, int span, int channel, int changestatus)
{
struct q931_call *c;
int pd = MAINTENANCE_PROTOCOL_DISCRIMINATOR_1;
int mt = ATT_SERVICE;
c = q931_getcall(ctrl, 0 | 0x8000);
if (!c) {
@ -3415,7 +3440,12 @@ int maintenance_service(struct pri *ctrl, int span, int channel, int changestatu
c->ds1no = span;
c->ds1explicit = 0;
c->changestatus = changestatus;
return send_message(ctrl, c, (MAINTENANCE_PROTOCOL_DISCRIMINATOR_1 << 8) | NATIONAL_SERVICE, maintenance_service_ies);
if (ctrl->switchtype == PRI_SWITCH_NI2) {
pd = MAINTENANCE_PROTOCOL_DISCRIMINATOR_2;
mt = NATIONAL_SERVICE;
}
return send_message(ctrl, c, (pd << 8) | mt, maintenance_service_ies);
}
static int status_ies[] = { Q931_CAUSE, Q931_IE_CALL_STATE, -1 };
@ -4128,8 +4158,11 @@ static int prepare_to_handle_maintenance_message(struct pri *ctrl, q931_mh *mh,
/* 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:
/* the ATT_SERVICE/ATT_SERVICE_ACKNOWLEDGE and NATIONAL_SERVICE/NATIONAL_SERVICE_ACKNOWLEDGE
* are mirrors of each other. We only have to check for one type because they are pre-handled
* the same way as each other */
case ATT_SERVICE:
case ATT_SERVICE_ACKNOWLEDGE:
c->channelno = -1;
c->slotmap = -1;
c->chanflags = 0;
@ -4140,7 +4173,7 @@ static int prepare_to_handle_maintenance_message(struct pri *ctrl, q931_mh *mh,
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);
pri_error(ctrl, "!! Don't know how to pre-handle maintenance message type '%d'\n", mh->msg);
return -1;
}
return 0;
@ -4419,18 +4452,18 @@ int q931_receive(struct pri *ctrl, q931_h *h, int len)
/* Post handling */
if ((h->pd == MAINTENANCE_PROTOCOL_DISCRIMINATOR_1) || (h->pd == MAINTENANCE_PROTOCOL_DISCRIMINATOR_2)) {
res = post_handle_maintenance_message(ctrl, mh, c);
res = post_handle_maintenance_message(ctrl, h->pd, 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)
static int post_handle_maintenance_message(struct pri *ctrl, int protodisc, struct q931_mh *mh, struct q931_call *c)
{
/* Do some maintenance stuff */
switch (mh->msg) {
case NATIONAL_SERVICE:
if (((protodisc == MAINTENANCE_PROTOCOL_DISCRIMINATOR_1) && (mh->msg == ATT_SERVICE))
|| ((protodisc == MAINTENANCE_PROTOCOL_DISCRIMINATOR_2) && (mh->msg == NATIONAL_SERVICE))) {
if (c->channelno > 0) {
ctrl->ev.e = PRI_EVENT_SERVICE;
ctrl->ev.service.channel = q931_encode_channel(c);
@ -4452,7 +4485,9 @@ static int post_handle_maintenance_message(struct pri *ctrl, struct q931_mh *mh,
}
maintenance_service_ack(ctrl, c);
return Q931_RES_HAVEEVENT;
case NATIONAL_SERVICE_ACKNOWLEDGE:
}
if (((protodisc == MAINTENANCE_PROTOCOL_DISCRIMINATOR_1) && (mh->msg == ATT_SERVICE_ACKNOWLEDGE))
|| ((protodisc == MAINTENANCE_PROTOCOL_DISCRIMINATOR_2) && (mh->msg == NATIONAL_SERVICE_ACKNOWLEDGE))) {
if (c->channelno > 0) {
ctrl->ev.e = PRI_EVENT_SERVICE_ACK;
ctrl->ev.service_ack.channel = q931_encode_channel(c);
@ -4473,9 +4508,9 @@ static int post_handle_maintenance_message(struct pri *ctrl, struct q931_mh *mh,
}
}
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);
}
pri_error(ctrl, "!! Don't know how to post-handle maintenance message type %d\n", mh->msg);
return -1;
}