92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/* $NetBSD: dl_print.c,v 1.3 2016/04/06 18:04:58 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: dl_print.c,v 1.3 2016/04/06 18:04:58 christos Exp $");
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#include <sys/systm.h>
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#else
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__RCSID("$NetBSD: dl_print.c,v 1.3 2016/04/06 18:04:58 christos Exp $");
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#include <stdio.h>
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static const uint8_t hexdigits[] = "0123456789abcdef";
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#endif
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#include <net/if_dl.h>
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int
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dl_print(char *buf, size_t len, const struct dl_addr *dl)
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{
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const uint8_t *ap = (const uint8_t *)dl->dl_data;
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char abuf[256 * 3], *cp, *ecp;
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ap += dl->dl_nlen;
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cp = abuf;
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ecp = abuf + sizeof(abuf);
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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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} while (/*CONSTCOND*/0)
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for (size_t i = 0; i < dl->dl_alen; i++) {
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ADDX((u_int)ap[i] >> 4);
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ADDX(ap[i] & 0xf);
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ADDC(':');
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}
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if (cp > abuf)
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--cp;
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if (ecp > abuf) {
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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 snprintf(buf, len, "%.*s/%hhu#%s",
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(int)dl->dl_nlen, dl->dl_data, dl->dl_type, abuf);
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}
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int
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sdl_print(char *buf, size_t len, const void *v)
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{
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const struct sockaddr_dl *sdl = v;
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char abuf[LINK_ADDRSTRLEN];
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if (sdl->sdl_slen == 0 && sdl->sdl_nlen == 0 && sdl->sdl_alen == 0)
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return snprintf(buf, len, "link#%hu", sdl->sdl_index);
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dl_print(abuf, sizeof(abuf), &sdl->sdl_addr);
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return snprintf(buf, len, "[%s]:%hu", abuf, sdl->sdl_index);
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}
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