diff options
Diffstat (limited to 'usr.sbin/i4b/isdndecode/layer3.c')
| -rw-r--r-- | usr.sbin/i4b/isdndecode/layer3.c | 508 |
1 files changed, 508 insertions, 0 deletions
diff --git a/usr.sbin/i4b/isdndecode/layer3.c b/usr.sbin/i4b/isdndecode/layer3.c new file mode 100644 index 0000000..6376a13 --- /dev/null +++ b/usr.sbin/i4b/isdndecode/layer3.c @@ -0,0 +1,508 @@ +/* + * Copyright (c) 1997, 1998 Hellmuth Michaelis. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + *--------------------------------------------------------------------------- + * + * layer3.c - decode and print layer 3 (Q.931) information + * ------------------------------------------------------- + * + * $Id: layer3.c,v 1.5 1998/12/18 17:09:38 hm Exp $ + * + * last edit-date: [Fri Dec 18 18:12:21 1998] + * + *---------------------------------------------------------------------------*/ + +#include "decode.h" + +char *mttab[] = { + +/* 0x00 */ /* call establishment group */ + + "ESCAPE", + "ALERTING", + "CALL PROCEEDING", + "PROGRESS", + "undefined (0x04)", + "SETUP", + "undefined (0x06)", + "CONNECT", + "undefined (0x08)", + "undefined (0x09)", + "undefined (0x0a)", + "undefined (0x0b)", + "undefined (0x0c)", + "SETUP ACKNOWLEDGE", + "undefined (0x0e)", + "CONNECT ACKNOWLEDGE", + +/* 0x10 */ + "undefined (0x10)", + "undefined (0x11)", + "undefined (0x12)", + "undefined (0x13)", + "undefined (0x14)", + "undefined (0x15)", + "undefined (0x16)", + "undefined (0x17)", + "undefined (0x18)", + "undefined (0x19)", + "undefined (0x1a)", + "undefined (0x1b)", + "undefined (0x1c)", + "undefined (0x1d)", + "undefined (0x1e)", + "undefined (0x1f)", + +/* 0x20 */ + + "USER INFORMATION", /* call information phase */ + "SUSPEND REJECT", + "RESUME REJECT", + "undefined (0x23)", + "HOLD", + "SUSPEND", + "RESUME", + "undefined (0x27)", + "HOLD ACKNOWLEDGE", + "undefined (0x29)", + "undefined (0x2a)", + "undefined (0x2b)", + "undefined (0x2c)", + "SUSPEND ACKNOWLEDGE", + "RESUME ACKNOWLEDGE", + "undefined (0x2f)", + +/* 0x30 */ + + "HOLD REJECT", + "RETRIEVE", + "undefined (0x32)", + "RETRIEVE ACKNOWLEDGE", + "undefined (0x34)", + "undefined (0x35)", + "undefined (0x36)", + "RETRIEVE REJECT", + "undefined (0x38)", + "undefined (0x39)", + "undefined (0x3a)", + "undefined (0x3b)", + "undefined (0x3c)", + "undefined (0x3d)", + "undefined (0x3e)", + "undefined (0x3f)", + +/* 0x40 */ + + "DETACH", /* call clearing */ + "undefined (0x41)", + "undefined (0x42)", + "undefined (0x43)", + "undefined (0x44)", + "DISCONNECT", + "RESTART", + "undefined (0x47)", + "DETACH ACKNOWLEDGE", + "undefined (0x49)", + "undefined (0x4a)", + "undefined (0x4b)", + "undefined (0x4c)", + "RELEASE", + "RESTART ACKNOWLEDGE", + "undefined (0x4f)", + +/* 0x50 */ + + "undefined (0x50)", + "undefined (0x51)", + "undefined (0x52)", + "undefined (0x53)", + "undefined (0x54)", + "undefined (0x55)", + "undefined (0x56)", + "undefined (0x57)", + "undefined (0x58)", + "undefined (0x59)", + "RELEASE COMPLETE", + "undefined (0x5b)", + "undefined (0x5c)", + "undefined (0x5d)", + "undefined (0x5e)", + "undefined (0x5f)", + +/* 0x60 */ + + "SEGMENT", /* misc messages */ + "undefined (0x61)", + "FACILITY", + "undefined (0x63)", + "REGISTER", + "undefined (0x65)", + "undefined (0x66)", + "undefined (0x67)", + "CANCEL ACKNOWLEDGE", + "undefined (0x69)", + "FACILITY ACKNOWLEDGE", + "undefined (0x6b)", + "REGISTER ACKNOWLEDGE", + "undefined (0x6d)", + "NOTIFY", + "undefined (0x6f)", + +/* 0x70 */ + + "CANCEL REJECT", + "undefined (0x71)", + "FACILITY REJECT", + "undefined (0x73)", + "REGISTER REJECT", + "STATUS ENQIRY", + "undefined (0x76)", + "undefined (0x77)", + "undefined (0x78)", + "CONGESTION CONTROL", + "undefined (0x7a)", + "INFORMATION", + "undefined (0x7c)", + "STATUS", + "undefined (0x7e)", + "undefined (0x7f)", +}; + +#define MTTAB_MAX 0x7f + +extern int f_null(char *pbuf, unsigned char *buf, int off); +extern int f_bc(char *pbuf, unsigned char *buf, int off); +extern int f_cause(char *pbuf, unsigned char *buf, int off); +extern int f_cstat(char *pbuf, unsigned char *buf, int off); +extern int f_chid(char *pbuf, unsigned char *buf, int off); +extern int f_fac(char *pbuf, unsigned char *buf, int off); +extern int f_progi(char *pbuf, unsigned char *buf, int off); +extern int f_displ(char *pbuf, unsigned char *buf, int off); +extern int f_date(char *pbuf, unsigned char *buf, int off); +extern int f_cnu(char *pbuf, unsigned char *buf, int off); +extern int f_cgpn(char *pbuf, unsigned char *buf, int off); +extern int f_cdpn(char *pbuf, unsigned char *buf, int off); +extern int f_hlc(char *pbuf, unsigned char *buf, int off); + +struct ie { + unsigned char code; /* information element identifier code */ + char *name; /* ie name */ + int (*func) (char *pbuf, unsigned char *buf, int off); /* decode function */ +} ietab[] = { + { 0x00, "segmented message", f_null }, + { 0x04, "bearer capability", f_bc }, + { 0x08, "cause", f_cause }, + { 0x0c, "connected address", f_null }, + { 0x0d, "extended facility", f_null }, + { 0x10, "call identity", f_null }, + { 0x14, "call state", f_cstat }, + { 0x18, "channel id", f_chid }, + { 0x19, "data link connection id", f_null }, + { 0x1c, "facility", f_fac }, + { 0x1e, "progress indicator", f_progi }, + { 0x20, "network specific facilities", f_null }, + { 0x24, "terminal capabilities", f_null }, + { 0x27, "notification indicator", f_null }, + { 0x28, "display", f_displ }, + { 0x29, "date/time", f_date }, + { 0x2c, "keypad", f_null }, + { 0x30, "keypad echo", f_null }, + { 0x32, "information request", f_null }, + { 0x34, "signal", f_null }, + { 0x36, "switchhook", f_null }, + { 0x38, "feature activation", f_null }, + { 0x39, "feature indication", f_null }, + { 0x3a, "service profile id", f_null }, + { 0x3b, "endpoint identifier", f_null }, + { 0x40, "information rate", f_null }, + { 0x41, "precedence level", f_null }, + { 0x42, "end-to-end transit delay", f_null }, + { 0x43, "transit delay detection", f_null }, + { 0x44, "packet layer binary parms", f_null }, + { 0x45, "packet layer window size", f_null }, + { 0x46, "packet size", f_null }, + { 0x47, "closed user group", f_null }, + { 0x48, "link layer core parameters", f_null }, + { 0x49, "link layer protocol parms", f_null }, + { 0x4a, "reverse charging information", f_null }, + { 0x4c, "connected number", f_cnu }, + { 0x4d, "connected subaddress", f_null }, + { 0x50, "X.213 priority", f_null }, + { 0x51, "report type", f_null }, + { 0x53, "link integrity verification", f_null }, + { 0x57, "PVC status", f_null }, + { 0x6c, "calling party number", f_cnu }, + { 0x6d, "calling party subaddress", f_null }, + { 0x70, "called party number", f_cnu }, + { 0x71, "called party subaddress", f_null }, + { 0x74, "redirecting number", f_null }, + { 0x78, "transit network selection", f_null }, + { 0x79, "restart indicator", f_null }, + { 0x7c, "low layer compatibility", f_null }, + { 0x7d, "high layer compatibility", f_hlc }, + { 0x7e, "user-user", f_null }, + { 0x7f, "escape for extension", f_null }, + { 0xff, "unknown information element", f_null } +}; + +/*---------------------------------------------------------------------------* + * decode Q.931 protocol + *---------------------------------------------------------------------------*/ +void +layer3(char *pbuf, int n, int off, unsigned char *buf) +{ + char buffer[256]; + int codeset = 0; + int codelock = 0; + int oldcodeset = 0; + + int pd; + int len; + int j; + int i; + + if(n <= 0) + return; + + *pbuf = '\0'; + + i = 0; + + /* protocol discriminator */ + + pd = buf[i]; + + if(pd >= 0x00 && pd <= 0x07) + sprintf(buffer, "User-User IE (0x%02x)",pd); + else if(pd == 0x08) + sprintf(buffer, "Q.931/I.451"); + else if(pd >= 0x10 && pd <= 0x3f) + sprintf(buffer, "Other Layer 3 or X.25 (0x%02x)",pd); + else if(pd >= 0x40 && pd <= 0x4f) + sprintf(buffer, "National Use (0x%02x)",pd); + else if(pd >= 0x50 && pd <= 0xfe) + sprintf(buffer, "Other Layer 3 or X.25 (0x%02x)",pd); + else + sprintf(buffer, "Reserved (0x%02x)",pd); + + sprintline(3, (pbuf+strlen(pbuf)), off+i, pd, 0xff, "Protocol discriminator = %s", buffer); + i++; + + /* call reference */ + + len = buf[i] & 0x0f; + + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0xf0, "Call Reference"); + + switch(len) + { + case 0: + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x0f, "Length of Call Reference = 0 (Dummy CR)"); + break; + case 1: + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x0f, "Length of Call Reference = 1"); + i++; + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x80, "Call Reference sent %s origination side", (buf[i] & 0x80) ? "to" : "from"); + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x7f, "Call Reference = %d = 0x%02x", (buf[i] & 0x7f), (buf[i] & 0x7f)); + break; + case 2: + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x0f, "Length of Call Reference = 2"); + i++; + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x80, "Call Reference sent %s origination side", (buf[i] & 0x80) ? "to" : "from"); + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x7f, "Call reference = %d = %02x", (buf[i] & 0x7f)); + i++; + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0xff, "Call reference = %d = %02x", (buf[i])); + break; + } + i++; + + /* message type */ + + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x80, "Message type extension = %d", buf[i] & 0x80 ? 1 : 0); + + if(buf[i] <= MTTAB_MAX) + strcpy(buffer, mttab[buf[i]]); + else + sprintf(buffer, "unknown (0x%02x)", buf[i]); + + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x7f, "Message type = %s", buffer); + i++; + + /* information elements */ + + for (; i < n;) + { + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x80, "%s Information element", buf[i] & 0x80 ? "Single octet" : "Variable length"); + + if(buf[i] & 0x80) + { + /* single octett info element type 1 */ + + if((buf[i] & 0x70) == 0x00) + { + strcpy(buffer, "Reserved"); + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x70, "Reserved"); + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x0f, "Reserved, content of IE"); + } + else if((buf[i] & 0x70) == 0x10) + { + strcpy(buffer, "Shift"); + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x70, "Shift"); + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x08, "%s shift", buf[i] & 0x08 ? "Non-locking" : "Locking"); + + switch(buf[i] & 0x07) + { + case 0: + strcpy(buffer, "Not applicable"); + break; + case 1: + case 2: + case 3: + sprintf(buffer, "Reserved (%d)", buf[i] & 0x07); + break; + case 4: + strcpy(buffer, "Codeset 4 (ISO/IEC)"); + break; + case 5: + strcpy(buffer, "Codeset 5 (National use)"); + break; + case 6: + strcpy(buffer, "Codeset 6 (Local network specific)"); + break; + case 7: + strcpy(buffer, "Codeset 7 (User specific)"); + break; + } + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x07, "%s", buffer); + break; + } + else if((buf[i] & 0x70) == 0x30) + { + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x70, "Congestion Level"); + switch(buf[i] & 0x0f) + { + case 0x00: + strcpy(buffer, "receiver ready"); + break; + case 0x0f: + strcpy(buffer, "receiver not ready"); + break; + default: + sprintf(buffer, "reserved (0x%02x)", buf[i] & 0x0f); + break; + } + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x0f, "Congestion Level = ", buffer); + break; + } + else if((buf[i] & 0x70) == 0x50) + { + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x70, "Repeat Indicator"); + switch(buf[i] & 0x0f) + { + case 0x02: + strcpy(buffer, "Prioritized list for selecting one possibility"); + break; + default: + sprintf(buffer, "reserved (0x%02x)", buf[i] & 0x0f); + break; + } + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x0f, "Repeat indication = ", buffer); + break; + } + + /* single octett info element type 2 */ + + else if((buf[i] & 0x7f) == 0x20) + { + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x7f, "More data"); + } + else if((buf[i] & 0x7f) == 0x21) + { + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x7f, "Sending complete"); + } + else + { + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0xff, "UNKNOWN single octet IE = 0x%02x", buf[i]); + } + i++; /* next */ + } + else + { + if(codeset == 0) + { + struct ie *iep = &ietab[0]; + + for(;;) + { + if((iep->code == buf[i]) || + (iep->code == 0xff)) + break; + iep++; + } + + sprintline(3, (pbuf+strlen(pbuf)), off+i, buf[i], 0x7f, "IE = %s", iep->name); + sprintline(3, pbuf+strlen(pbuf), off+i+1, buf[i+1], 0xff, "IE Length = %d", buf[i+1]); + + if(iep->func == f_null) + { + } + else + { + i += (iep->func)(pbuf, &buf[i], off+i); + goto next; + } + } + else + { + sprintf((pbuf+strlen(pbuf)), "UNKNOWN CODESET=%d, IE=0x%02x", codeset, buf[i]); + } + + i++; /* index -> length */ + + len = buf[i]; + + sprintf((pbuf+strlen(pbuf)), "LEN=0x%02x, DATA=", len); + + i++; /* index -> 1st param */ + + for(j = 0; j < len; j++) + { + sprintf((pbuf+strlen(pbuf)),"0x%02x ", buf[j+i]); + } + + sprintf((pbuf+strlen(pbuf)),"]"); + + i += len; + +next: + + if(!codelock && (codeset != oldcodeset)) + codeset = oldcodeset; + } + } +/* sprintf((pbuf+strlen(pbuf)),"\n"); */ +} + +/* EOF */ + |
