| 1 | /* $NetBSD: dl_print.c,v 1.3 2016/04/06 18:04:58 christos Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2014 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 17 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 18 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 19 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 20 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 26 | * POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | #include <sys/cdefs.h> |
| 29 | #include <sys/types.h> |
| 30 | |
| 31 | #ifdef _KERNEL |
| 32 | __KERNEL_RCSID(0, "$NetBSD: dl_print.c,v 1.3 2016/04/06 18:04:58 christos Exp $" ); |
| 33 | #include <sys/systm.h> |
| 34 | #else |
| 35 | __RCSID("$NetBSD: dl_print.c,v 1.3 2016/04/06 18:04:58 christos Exp $" ); |
| 36 | #include <stdio.h> |
| 37 | static const uint8_t hexdigits[] = "0123456789abcdef" ; |
| 38 | #endif |
| 39 | #include <net/if_dl.h> |
| 40 | |
| 41 | int |
| 42 | dl_print(char *buf, size_t len, const struct dl_addr *dl) |
| 43 | { |
| 44 | const uint8_t *ap = (const uint8_t *)dl->dl_data; |
| 45 | char abuf[256 * 3], *cp, *ecp; |
| 46 | |
| 47 | ap += dl->dl_nlen; |
| 48 | cp = abuf; |
| 49 | ecp = abuf + sizeof(abuf); |
| 50 | |
| 51 | #define ADDC(c) do { \ |
| 52 | if (cp >= ecp) {\ |
| 53 | cp++; \ |
| 54 | } else \ |
| 55 | *cp++ = (char)(c); \ |
| 56 | } while (/*CONSTCOND*/0) |
| 57 | |
| 58 | #define ADDX(v) do { \ |
| 59 | uint8_t n = hexdigits[(v)]; \ |
| 60 | ADDC(n); \ |
| 61 | } while (/*CONSTCOND*/0) |
| 62 | |
| 63 | for (size_t i = 0; i < dl->dl_alen; i++) { |
| 64 | ADDX((u_int)ap[i] >> 4); |
| 65 | ADDX(ap[i] & 0xf); |
| 66 | ADDC(':'); |
| 67 | } |
| 68 | if (cp > abuf) |
| 69 | --cp; |
| 70 | if (ecp > abuf) { |
| 71 | if (cp < ecp) |
| 72 | *cp = '\0'; |
| 73 | else |
| 74 | *--ecp = '\0'; |
| 75 | } |
| 76 | return snprintf(buf, len, "%.*s/%hhu#%s" , |
| 77 | (int)dl->dl_nlen, dl->dl_data, dl->dl_type, abuf); |
| 78 | } |
| 79 | |
| 80 | int |
| 81 | sdl_print(char *buf, size_t len, const void *v) |
| 82 | { |
| 83 | const struct sockaddr_dl *sdl = v; |
| 84 | char abuf[LINK_ADDRSTRLEN]; |
| 85 | |
| 86 | if (sdl->sdl_slen == 0 && sdl->sdl_nlen == 0 && sdl->sdl_alen == 0) |
| 87 | return snprintf(buf, len, "link#%hu" , sdl->sdl_index); |
| 88 | |
| 89 | dl_print(abuf, sizeof(abuf), &sdl->sdl_addr); |
| 90 | return snprintf(buf, len, "[%s]:%hu" , abuf, sdl->sdl_index); |
| 91 | } |
| 92 | |