d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
f403e6edea
freebsd-dev/usr.sbin/i4b/isdntrace/q921.c
Poul-Henning Kamp 19c749625f Initial entry of ISDN4BSD into the FreeBSD tree. 
ISDN4BSD is the work of our brand-new comitter: Hellmuth Michaelis,
who has done a tremendous amount of work to bring us this far.

There are still some outstanding issues and files to bring into
the tree, and for now it will be needed to pick up all the extra
docs from the isdn4bsd release.

It is probably also a very good idea to subscribe to the isdn@freebsd.org
mailing list before you try this out.

These files correspond to release "beta Version 0.70.00 / December
1998" from Hellmuth.
1998-12-27 21:47:14 +00:00

276 lines
7.2 KiB
C
Raw Blame History

/*
* Copyright (c) 1996 Gary Jennejohn. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*---------------------------------------------------------------------------*
*
* q.921.c - print Q.921 traces
* ----------------------------
*
* $Id: q921.c,v 1.2 1998/04/16 15:27:02 hm Exp $
*
* last edit-date: [Thu Apr 16 15:38:34 1998]
*
* -hm splitting
* -hm printing to buffer
* -hm slightly reformatted TEI management proc output
* -hm minor fixes
* -hm fixing response/command
* -hm fixing count off by one
* -hm dump only Q.921 part of frame
* -hm cleanup
*
*---------------------------------------------------------------------------*/
#include "trace.h"
/*---------------------------------------------------------------------------*
* decode LAPD (Q.921) protocol
*---------------------------------------------------------------------------*/
int
decode_lapd(char *pbuf, int n, unsigned char *buf, int dir, int raw, int printit)
{
int sap, tei, cmd, p_f;
int cnt = 0;
int i;
char locbuf[32000];
char *lbufp = &locbuf[0];
*lbufp = '\0';
*pbuf = '\0';
sap = (buf[0] >> 2) & 0x3f;
cnt++;
tei = buf[1] >> 1;
cnt++;
if(dir == FROM_TE)
cmd = !(buf[0] & 2);
else
cmd = buf[0] & 2;
switch (sap)
{
/* SAPI control procedures */
case 0:
{
if(printit)
sprintf((lbufp+strlen(lbufp)), "Q921: SAP=%d (Call Control), %c, TEI=%d, ", sap, cmd?'C':'R', tei);
if((buf[2] & 0x01) == 0)
{
if(printit)
sprintf((lbufp+strlen(lbufp)), "I-Frame: ");
p_f = buf [3] & 1;
if(printit)
sprintf((lbufp+strlen(lbufp)), "N(S) %d N(R) %d P %d ", buf [2] >> 1, buf [3] >> 1, p_f);
cnt += 2;
}
else if((buf[2] & 0x03) == 0x01)
{
if(printit)
sprintf((lbufp+strlen(lbufp)), "S-Frame: ");
p_f = buf [3] & 1;
cmd = buf [2] & 0x0c;
if(printit)
{
if (cmd == 0)
sprintf((lbufp+strlen(lbufp)), "RR N(R) %d PF %d ", buf [3] >> 1, p_f);
if (cmd == 4)
sprintf((lbufp+strlen(lbufp)), "RNR N(R) %d PF %d ", buf [3] >> 1, p_f);
if (cmd == 8)
sprintf((lbufp+strlen(lbufp)), "REJ N(R) %d PF %d ", buf [3] >> 1, p_f);
}
cnt += 2;
}
else if((buf[2] & 0x03) == 0x03)
{
if(printit)
sprintf((lbufp+strlen(lbufp)), "U-Frame: ");
p_f = (buf [2] & 0x10) >> 4;
cmd = buf [2] & 0xec;
if(printit)
{
if (cmd == 0x6c)
sprintf((lbufp+strlen(lbufp)), "SABME PF %d ", p_f);
if (cmd == 0x0c)
sprintf((lbufp+strlen(lbufp)), "DM PF %d ", p_f);
if (cmd == 0)
sprintf((lbufp+strlen(lbufp)), "UI PF %d ", p_f);
if (cmd == 0x40)
sprintf((lbufp+strlen(lbufp)), "DISC PF %d ", p_f);
if (cmd == 0x60)
sprintf((lbufp+strlen(lbufp)), "UA PF %d ", p_f);
if (cmd == 0x84)
sprintf((lbufp+strlen(lbufp)), "FRMR PF %d ", p_f);
if (cmd == 0xac)
sprintf((lbufp+strlen(lbufp)), "XID PF %d ", p_f);
/* information field ??? */
}
cnt++;
}
break;
}
/* D channel X.25 */
case 16:
if(printit)
sprintf((lbufp+strlen(lbufp)), "Q921: SAP=%d (X.25), %c, TEI=%d, ", sap, cmd?'C':'R', tei);
cnt = n;
goto dump;
/* Loopback test */
case 32:
if(printit)
sprintf((lbufp+strlen(lbufp)), "Q921: SAP=%d (Loopbacktest), %c, TEI=%d, ", sap, cmd?'C':'R', tei);
cnt = n;
goto dump;
/* SAPI layer 2 management functions */
case 63:
{
if(printit)
sprintf((lbufp+strlen(lbufp)), "Q921: SAP=%d (TEI-Management), %c, TEI=%d, ", sap, cmd?'C':'R', tei);
if (tei != 127)
{
if(printit)
sprintf((lbufp+strlen(lbufp)), "ILLEGAL TEI\n");
cnt = n;
goto dump;
}
if (buf [2] != 3 && buf [3] != 0xf)
{
if(printit)
sprintf((lbufp+strlen(lbufp)), "invalid format!\n");
cnt = n;
goto dump;
}
cnt+= 2; /* UI + MEI */
if(printit)
sprintf((lbufp+strlen(lbufp)), "Ri=0x%04hx, ", *(short *)&buf[4]);
cnt += 2; /* Ri */
switch (buf[6])
{
case 1:
if(printit)
sprintf((lbufp+strlen(lbufp)), "IdRequest, Ai=%d", (buf [7] >> 1));
cnt += 2;
break;
case 2:
if(printit)
sprintf((lbufp+strlen(lbufp)), "IdAssign, Ai=%d", (buf [7] >> 1));
cnt += 2;
break;
case 3:
if(printit)
sprintf((lbufp+strlen(lbufp)), "IdDenied, Ai=%d", (buf [7] >> 1));
cnt += 2;
break;
case 4:
if(printit)
sprintf((lbufp+strlen(lbufp)), "IdCheckReq, Ai=%d", (buf [7] >> 1));
cnt += 2;
break;
case 5:
if(printit)
sprintf((lbufp+strlen(lbufp)), "IdCheckResp, Ai=%d", (buf [7] >> 1));
cnt += 2;
break;
case 6:
if(printit)
sprintf((lbufp+strlen(lbufp)), "IdRemove, Ai=%d", (buf [7] >> 1));
cnt += 2;
break;
case 7:
if(printit)
sprintf((lbufp+strlen(lbufp)), "IdVerify, Ai=%d", (buf [7] >> 1));
cnt += 2;
break;
default:
if(printit)
sprintf((lbufp+strlen(lbufp)), "Unknown Msg Type\n");
cnt = n;
goto dump;
}
break;
}
/* Illegal SAPI */
default:
if(printit)
sprintf((lbufp+strlen(lbufp)), "Q921: ERROR, SAP=%d (Illegal SAPI), %c, TEI=%d\n", sap, cmd?'C':'R', tei);
cnt = n;
goto dump;
}
dump:
if(printit)
sprintf((lbufp+strlen(lbufp)), "\n");
if(raw && printit)
{
int j;
for (i = 0; i < cnt; i += 16)
{
sprintf((pbuf+strlen(pbuf)),"Dump:%.3d ", i);
for (j = 0; j < 16; j++)
if (i + j < cnt)
sprintf((pbuf+strlen(pbuf)),"%02x ", buf[i + j]);
else
sprintf((pbuf+strlen(pbuf))," ");
sprintf((pbuf+strlen(pbuf))," ");
for (j = 0; j < 16 && i + j < cnt; j++)
if (isprint(buf[i + j]))
sprintf((pbuf+strlen(pbuf)),"%c", buf[i + j]);
else
sprintf((pbuf+strlen(pbuf)),".");
sprintf((pbuf+strlen(pbuf)),"\n");
}
}
sprintf((pbuf+strlen(pbuf)),"%s", &locbuf[0]);
return (cnt);
}
/* EOF */
Reference in New Issue View Git Blame Copy Permalink