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/* ************************************************************ *
* *
* Decoding and switching routines for the NAS protocol *
* *
* James Peterson, 1988 *
* (c) Copyright MCC, 1988 *
* *
* ************************************************************ */
#include "scope.h"
#include "nas.h"
/*
There are 4 types of things in NAS: requests, replies, errors, and events.
Each of them has a format defined by a small integer that defines
the type of the thing.
Requests have an opcode in the first byte.
Events have a code in the first byte.
Errors have a code in the second byte (the first byte is 0)
Replies ...
Replies have a sequence number in bytes 2 and 3. The sequence
number should be used to identify the request that was sent, and
from that request we can determine the type of the reply.
*/
/* ************************************************************ */
/* */
/* */
/* ************************************************************ */
/*
We need to keep the sequence number for a request to match it with
an expected reply. The sequence number is associated only with the
particular connection that we have. We would expect these replies
to be handled as a FIFO queue.
*/
#define DUMP_REQUEST 0
#define DUMP_REPLY 1
#define DUMP_EVENT 2
#define DUMP_ERROR 3
static const char *const simple_names[] = {
"REQUEST",
"REPLY ",
"EVENT ",
"ERROR ",
};
static void
AudioSimpleDump(int type, FD fd, short Major, short Minor, long bytes)
{
PrintTime();
fprintf(stdout, "@@%s %3d %3d %3d %7ld\n",
simple_names[type], ClientNumber(fd), Major, Minor, bytes);
}
/* ************************************************************ */
/* */
/* */
/* ************************************************************ */
void
DecodeAudioRequest(FD fd, const unsigned char *buf, long n)
{
short Request = IByte(&buf[0]);
short RequestMinor = Request >= 128 ? IByte(&buf[1]) : 0;
unsigned long seq;
CS[fd].SequenceNumber += 1;
seq = CS[fd].SequenceNumber;
if (CS[fd].littleEndian) {
SBf[0] = seq;
SBf[1] = seq >> 8;
SBf[2] = seq >> 16;
SBf[3] = seq >> 24;
}
else {
SBf[0] = seq >> 24;
SBf[1] = seq >> 16;
SBf[2] = seq >> 8;
SBf[3] = seq;
}
SetIndentLevel(PRINTCLIENT);
if (NasVerbose == 0) {
AudioSimpleDump(DUMP_REQUEST, fd, Request, RequestMinor, n);
return;
}
if (NasVerbose > 3)
DumpItem("Request", fd, buf, n);
switch (Request) {
case 1:
AudioListDevices(buf);
ReplyExpected(fd, Request);
break;
case 2:
AudioGetDeviceAttributes(buf);
ReplyExpected(fd, Request);
break;
case 3:
AudioSetDeviceAttributes(buf);
break;
case 4:
AudioCreateBucket(buf);
break;
case 5:
AudioDestroyBucket(buf);
break;
case 6:
AudioListBuckets(buf);
ReplyExpected(fd, Request);
break;
case 7:
AudioGetBucketAttributes(buf);
ReplyExpected(fd, Request);
break;
case 8:
AudioSetBucketAttributes(buf);
break;
case 9:
AudioCreateRadio(buf);
break;
case 10:
AudioDestroyRadio(buf);
break;
case 11:
AudioListRadios(buf);
ReplyExpected(fd, Request);
break;
case 12:
AudioGetRadioAttributes(buf);
ReplyExpected(fd, Request);
break;
case 13:
AudioSetRadioAttributes(buf);
break;
case 14:
AudioCreateFlow(buf);
break;
case 15:
AudioDestroyFlow(buf);
break;
case 16:
AudioGetFlowAttributes(buf);
ReplyExpected(fd, Request);
break;
case 17:
AudioSetFlowAttributes(buf);
break;
case 18:
AudioGetElements(buf);
ReplyExpected(fd, Request);
break;
case 19:
AudioSetElements(buf);
break;
case 20:
AudioGetElementStates(buf);
ReplyExpected(fd, Request);
break;
case 21:
AudioSetElementStates(buf);
break;
case 22:
AudioGetElementParameters(buf);
ReplyExpected(fd, Request);
break;
case 23:
AudioSetElementParameters(buf);
break;
case 24:
AudioWriteElement(buf);
break;
case 25:
AudioReadElement(buf);
ReplyExpected(fd, Request);
break;
case 26:
AudioGrabComponent(buf);
break;
case 27:
AudioUngrabComponent(buf);
break;
case 28:
AudioSendEvent(buf);
break;
case 29:
AudioGetAllowedUsers(buf);
ReplyExpected(fd, Request);
break;
case 30:
AudioSetAllowedUsers(buf);
break;
case 31:
AudioListExtensions(buf);
ReplyExpected(fd, Request);
break;
case 32:
AudioQueryExtension(buf);
ReplyExpected(fd, Request);
break;
case 33:
AudioGetCloseDownMode(buf);
ReplyExpected(fd, Request);
break;
case 34:
AudioSetCloseDownMode(buf);
break;
case 35:
AudioKillClient(buf);
break;
case 36:
AudioGetServerTime(buf);
ReplyExpected(fd, Request);
break;
case 37:
AudioNoOperation(buf);
break;
default:
warn("Unimplemented request opcode");
break;
}
}
/* ************************************************************ */
/* */
/* */
/* ************************************************************ */
void
DecodeAudioReply(FD fd, const unsigned char *buf, long n)
{
short SequenceNumber = IShort(&buf[2]);
short RequestMinor;
short Request = CheckReplyTable(fd, SequenceNumber, &RequestMinor);
if (NasVerbose == 0) {
AudioSimpleDump(DUMP_REPLY, fd, Request, RequestMinor, n);
return;
}
SetIndentLevel(PRINTSERVER);
RBf[0] = Request; /* for the PrintField in the Reply procedure */
RBf[1] = RequestMinor;
if (NasVerbose > 3)
DumpItem("Reply", fd, buf, n);
switch (Request) {
case 0:
UnknownAudioReply(buf);
break;
case 1:
AudioListDevicesReply(buf);
break;
case 2:
AudioGetDeviceAttributesReply(buf);
break;
case 6:
AudioListBucketsReply(buf);
break;
case 7:
AudioGetBucketAttributesReply(buf);
break;
case 11:
AudioListRadiosReply(buf);
break;
case 12:
AudioGetRadioAttributesReply(buf);
break;
case 16:
AudioGetFlowAttributesReply(buf);
break;
case 18:
AudioGetElementsReply(buf);
break;
case 20:
AudioGetElementStatesReply(buf);
break;
case 22:
AudioGetElementParametersReply(buf);
break;
case 25:
AudioReadElementReply(buf);
break;
case 29:
AudioGetAllowedUsersReply(buf);
break;
case 31:
AudioListExtensionsReply(buf);
break;
case 32:
AudioQueryExtensionReply(buf);
break;
case 33:
AudioGetCloseDownModeReply(buf);
break;
case 36:
AudioGetServerTimeReply(buf);
break;
default:
warn("Unimplemented reply opcode");
break;
}
}
/* ************************************************************ */
/* */
/* */
/* ************************************************************ */
void
DecodeAudioError(FD fd, const unsigned char *buf, long n)
{
short Error = IByte(&buf[1]);
short Request = 0;
short RequestMinor = 0;
Request = CheckReplyTable(fd, (short) IShort(&buf[2]), &RequestMinor);
if (NasVerbose == 0) {
AudioSimpleDump(DUMP_ERROR, fd, Request, RequestMinor, n);
return;
}
SetIndentLevel(PRINTSERVER);
if (NasVerbose > 3)
DumpItem("Error", fd, buf, n);
}
/* ************************************************************ */
/* */
/* */
/* ************************************************************ */
void
DecodeAudioEvent(FD fd, const unsigned char *buf, long n)
{
short Event = IByte(&buf[0]);
short EventMinor = 0;
if (NasVerbose == 0) {
AudioSimpleDump(DUMP_EVENT, fd, Event, EventMinor, n);
return;
}
SetIndentLevel(PRINTSERVER);
if (NasVerbose > 3)
DumpItem("Event", fd, buf, n);
/* high-order bit means SendEvent generated */
if (Event & 0x80) {
debug(8, (stderr, "SendEvent generated event 0x%x\n", Event));
Event = Event & 0x7F;
}
switch (Event) {
case 2:
AudioElementNotify(buf);
break;
case 3:
AudioGrabNotify(buf);
break;
case 4:
AudioMonitorNotify(buf);
break;
case 5:
AudioBucketNotify(buf);
break;
case 6:
AudioDeviceNotify(buf);
break;
default:
warn("Unimplemented event code");
break;
}
}
void
InitializeAudioDecode(void)
{
TYPE p;
p = DefineType(NASREQUEST, ENUMERATED, "NASREQUEST",
(PrintProcType) PrintENUMERATED);
DefineEValue(p, 1L, "ListDevices");
DefineEValue(p, 2L, "GetDeviceAttributes");
DefineEValue(p, 3L, "SetDeviceAttributes");
DefineEValue(p, 4L, "CreateBucket");
DefineEValue(p, 5L, "DestroyBucket");
DefineEValue(p, 6L, "ListBuckets");
DefineEValue(p, 7L, "GetBucketAttributes");
DefineEValue(p, 8L, "SetBucketAttributes");
DefineEValue(p, 9L, "CreateRadio");
DefineEValue(p, 10L, "DestroyRadio");
DefineEValue(p, 11L, "ListRadios");
DefineEValue(p, 12L, "GetRadioAttributes");
DefineEValue(p, 13L, "SetRadioAttributes");
DefineEValue(p, 14L, "CreateFlow");
DefineEValue(p, 15L, "DestroyFlow");
DefineEValue(p, 16L, "GetFlowAttributes");
DefineEValue(p, 17L, "SetFlowAttributes");
DefineEValue(p, 18L, "GetElements");
DefineEValue(p, 19L, "SetElements");
DefineEValue(p, 20L, "GetElementStates");
DefineEValue(p, 21L, "SetElementStates");
DefineEValue(p, 22L, "GetElementParameters");
DefineEValue(p, 23L, "SetElementParameters");
DefineEValue(p, 24L, "WriteElement");
DefineEValue(p, 25L, "ReadElement");
DefineEValue(p, 26L, "GrabComponent");
DefineEValue(p, 27L, "UngrabComponent");
DefineEValue(p, 28L, "SendEvent");
DefineEValue(p, 29L, "GetAllowedUsers");
DefineEValue(p, 30L, "SetAllowedUsers");
DefineEValue(p, 31L, "ListExtensions");
DefineEValue(p, 32L, "QuerExtension");
DefineEValue(p, 33L, "GetCloseDownMode");
DefineEValue(p, 34L, "SetCloseDownMode");
DefineEValue(p, 35L, "KillClient");
DefineEValue(p, 36L, "GetServerTime");
DefineEValue(p, 37L, "NoOperation");
p = DefineType(NASREPLY, ENUMERATED, "NASREPLY",
(PrintProcType) PrintENUMERATED);
DefineEValue(p, 1L, "ListDevices");
DefineEValue(p, 2L, "GetDeviceAttributes");
DefineEValue(p, 6L, "ListBuckets");
DefineEValue(p, 7L, "GetBucketAttributes");
DefineEValue(p, 11L, "ListRadios");
DefineEValue(p, 12L, "GetRadioAttributes");
DefineEValue(p, 16L, "GetFlowAttributes");
DefineEValue(p, 18L, "GetElements");
DefineEValue(p, 20L, "GetElementStates");
DefineEValue(p, 22L, "GetElementParameters");
DefineEValue(p, 25L, "ReadElement");
DefineEValue(p, 29L, "GetAllowedUsers");
DefineEValue(p, 31L, "ListExtensions");
DefineEValue(p, 32L, "QueryExtension");
DefineEValue(p, 33L, "GetCloseDownMode");
DefineEValue(p, 36L, "GetServerTime");
p = DefineType(NASEVENT, ENUMERATED, "NASEVENT",
(PrintProcType) PrintENUMERATED);
DefineEValue(p, 2L, "ElementNotify");
DefineEValue(p, 3L, "GrabNotify");
DefineEValue(p, 4L, "MonitorNotify");
DefineEValue(p, 5L, "BucketNotify");
DefineEValue(p, 6L, "DeviceNotify");
}
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