133 lines
3.4 KiB
C
133 lines
3.4 KiB
C
/* $NetBSD: in6_print.c,v 1.1 2014/12/02 19:36:58 christos Exp $ */
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/*-
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* Copyright (c) 2014 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#ifdef _KERNEL
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__KERNEL_RCSID(0, "$NetBSD: in6_print.c,v 1.1 2014/12/02 19:36:58 christos Exp $");
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#include <sys/systm.h>
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#else
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__RCSID("$NetBSD: in6_print.c,v 1.1 2014/12/02 19:36:58 christos Exp $");
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#include <stdio.h>
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#define s6_addr32 __u6_addr.__u6_addr32
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static const uint8_t hexdigits[] = "0123456789abcdef";
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#endif
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#include <netinet/in.h>
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int
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in6_print(char *buf, size_t len, const struct in6_addr *ia6)
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{
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int i;
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char *bp;
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char *cp, *ecp;
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const uint16_t *a;
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const uint8_t *d;
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int dcolon = 0;
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if (IN6_IS_ADDR_V4MAPPED(ia6)) {
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char buf4[INET_ADDRSTRLEN];
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struct in_addr ia = { .s_addr = ia6->s6_addr32[3] };
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in_print(buf4, sizeof(buf4), &ia);
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return snprintf(buf, len, "::ffff:%s", buf4);
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}
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#define ADDC(c) do { \
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if (cp >= ecp) {\
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cp++; \
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} else \
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*cp++ = (char)(c); \
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} while (/*CONSTCOND*/0)
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#define ADDX(v) do { \
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uint8_t n = hexdigits[(v)]; \
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ADDC(n); \
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if (cp == bp && n == '0') \
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cp--; \
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} while (/*CONSTCOND*/0)
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cp = buf;
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ecp = buf + len;
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a = (const uint16_t *)ia6;
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for (i = 0; i < 8; i++) {
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if (dcolon == 1) {
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if (*a == 0) {
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if (i == 7)
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ADDC(':');
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a++;
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continue;
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} else
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dcolon = 2;
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}
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if (*a == 0) {
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if (dcolon == 0 && *(a + 1) == 0) {
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if (i == 0)
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ADDC(':');
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ADDC(':');
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dcolon = 1;
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} else {
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ADDC('0');
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ADDC(':');
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}
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a++;
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continue;
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}
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d = (const u_char *)a;
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bp = cp + 1;
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ADDX((u_int)*d >> 4);
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ADDX(*d & 0xf);
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d++;
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ADDX((u_int)*d >> 4);
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ADDX(*d & 0xf);
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ADDC(':');
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a++;
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}
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if (cp > buf)
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--cp;
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if (ecp > buf) {
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if (cp < ecp)
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*cp = '\0';
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else
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*--ecp = '\0';
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}
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return (int)(cp - buf);
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}
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int
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sin6_print(char *buf, size_t len, const void *v)
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{
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const struct sockaddr_in6 *sin6 = v;
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const struct in6_addr *ia6 = &sin6->sin6_addr;
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char abuf[INET6_ADDRSTRLEN];
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if (!sin6->sin6_port)
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return in6_print(buf, len, ia6);
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in6_print(abuf, sizeof(abuf), ia6);
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return snprintf(buf, len, "[%s]:%hu", abuf, ntohs(sin6->sin6_port));
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}
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