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/*
* Copyright (c) 1986, 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char rcsid[] = "$OpenBSD: ns_ntoa.c,v 1.13 2003/09/25 21:14:46 millert Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <netns/ns.h>
#include <stdio.h>
static char *spectHex(char *);
char *
ns_ntoa(struct ns_addr addr)
{
static char obuf[40];
union { union ns_net net_e; u_int32_t long_e; } net;
in_port_t port = htons(addr.x_port);
char *cp, *cp2;
u_char *up = addr.x_host.c_host;
u_char *uplim = up + 6;
size_t rem;
net.net_e = addr.x_net;
snprintf(obuf, sizeof obuf, "%x", ntohl(net.long_e));
cp = spectHex(obuf);
rem = sizeof(obuf) - (cp - obuf);
cp2 = cp + 1;
while (up < uplim && *up==0)
up++;
if (up == uplim) {
if (port) {
snprintf(cp, rem, ".0");
cp += 2;
rem -= 2;
}
} else {
snprintf(cp, rem, ".%x", *up++);
while (up < uplim) {
while (*cp) {
cp++;
rem--;
}
snprintf(cp, rem, "%02x", *up++);
}
cp = spectHex(cp2);
rem = sizeof(obuf) - (cp - obuf);
}
if (port) {
snprintf(cp, rem, ".%x", port);
spectHex(cp + 1);
}
return (obuf);
}
static char *
spectHex(char *p0)
{
int ok = 0, nonzero = 0;
char *p = p0;
for (; *p; p++) {
switch (*p) {
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
*p += ('A' - 'a');
/* fall into . . . */
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
ok = 1;
case '1': case '2': case '3': case '4': case '5':
case '6': case '7': case '8': case '9':
nonzero = 1;
}
}
if (nonzero && !ok) {
*p++ = 'H';
*p = 0;
}
return (p);
}
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