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/* $OpenBSD: ccitt_addr.c,v 1.8 2003/06/26 16:35:21 deraadt Exp $ */
/* $NetBSD: ccitt_addr.c,v 1.8 1995/04/23 10:33:41 cgd Exp $ */
/*
* Copyright (c) 1990, 1993
* The Regents of the University of California. 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 University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)ccitt_addr.c 8.1 (Berkeley) 6/5/93
*/
/*
* parse CCITT addresses
*
* Addresses must have the format: [hpr],x121address[,userdata][,protocol]
* items enclosed with square brackets are optional
* 'h' or 'p' means hi priority (packet size = 128; specific to Datapac
* and necessary only for X.25(76) and non-negotiating X.25(80) DTE's)
* 'r' means reverse charge (remote DTE pays for call).
* The x121address consists of an optional netid and dot, followed
* by a dte address.
*
* Frank Pronk
* The University of British Columbia
* Laboratory for Computational Vision
* Copyright (c) 1984
*/
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netccitt/x25.h>
static char *copychar(char *, char *);
int ccitt_addr(char *addr, struct sockaddr_x25 *xp);
int
ccitt_addr(addr, xp)
char *addr;
struct sockaddr_x25 *xp;
{
char *p, *ap, *limit;
int havenet = 0;
memset(xp, 0, sizeof (*xp));
xp->x25_family = AF_CCITT;
xp->x25_len = sizeof(*xp);
p = addr;
/*
* process optional priority and reverse charging flags
*/
if (*p == 'p' || *p == 'r' || *p == 'h') {
while (*p == 'p' || *p == 'r' || *p == 'h') {
if (*p == 'p' || *p == 'h')
xp->x25_opts.op_psize = X25_PS128;
else if (*p == 'r')
xp->x25_opts.op_flags |= X25_REVERSE_CHARGE;
p++;
}
if (*p != ',')
return (0);
p++;
}
if (*p == '\0')
return (0);
/*
* [network id:]X.121 address
*/
ap = xp->x25_addr;
limit = ap + sizeof (xp->x25_addr) - 1;
while (*p) {
if (*p == ',')
break;
if (*p == '.' || *p == ':') {
if (havenet)
return (0);
havenet++;
xp->x25_net = atoi (xp->x25_addr);
p++;
ap = xp->x25_addr;
*ap = '\0';
}
if (*p < '0' || *p > '9')
return (0);
if (ap >= limit)
return (0);
*ap++ = *p++;
}
if (*p == '\0')
return (1);
/*
* optional user data, bytes 4 to 16
*/
p++;
ap = xp->x25_udata + 4; /* first four bytes are protocol id */
limit = ap + sizeof (xp->x25_udata) - 4;
xp->x25_udlen = 4;
while (*p) {
if (*p == ',')
break;
if (ap >= limit)
return (0);
p = copychar (p, ap++);
xp->x25_udlen++;
}
if (xp->x25_udlen == 4)
xp->x25_udlen = 0;
if (*p == '\0')
return (1);
p++;
ap = xp->x25_udata; /* protocol id */
limit = ap + (xp->x25_udlen ? 4 : sizeof(xp->x25_udata));
while (*p) {
if (*p == ',')
return (0);
if (ap >= limit)
return (0);
p = copychar (p, ap++);
}
if (xp->x25_udlen == 0)
xp->x25_udlen = ap - xp->x25_udata;
return (1);
}
static char *
copychar (from, to)
char *from, *to;
{
int n;
if (*from != '\\' || from[1] < '0' || from[1] > '7') {
*to = *from++;
return (from);
}
n = *++from - '0';
from++;
if (*from >= '0' && *from <= '7') {
int n1;
n = n*8 + *from++ - '0';
if (*from >= '0' && *from <= '7' && (n1 = n*8 + *from-'0') < 256) {
n = n1;
from++;
}
}
*to = n;
return (from);
}
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