| 1 | /* $NetBSD: in6_print.c,v 1.1 2014/12/02 19:36:58 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 | |
| 30 | #include <sys/types.h> |
| 31 | #ifdef _KERNEL |
| 32 | __KERNEL_RCSID(0, "$NetBSD: in6_print.c,v 1.1 2014/12/02 19:36:58 christos Exp $" ); |
| 33 | #include <sys/systm.h> |
| 34 | #else |
| 35 | __RCSID("$NetBSD: in6_print.c,v 1.1 2014/12/02 19:36:58 christos Exp $" ); |
| 36 | #include <stdio.h> |
| 37 | #define s6_addr32 __u6_addr.__u6_addr32 |
| 38 | static const uint8_t hexdigits[] = "0123456789abcdef" ; |
| 39 | #endif |
| 40 | |
| 41 | #include <netinet/in.h> |
| 42 | |
| 43 | int |
| 44 | in6_print(char *buf, size_t len, const struct in6_addr *ia6) |
| 45 | { |
| 46 | int i; |
| 47 | char *bp; |
| 48 | char *cp, *ecp; |
| 49 | const uint16_t *a; |
| 50 | const uint8_t *d; |
| 51 | int dcolon = 0; |
| 52 | |
| 53 | if (IN6_IS_ADDR_V4MAPPED(ia6)) { |
| 54 | char buf4[INET_ADDRSTRLEN]; |
| 55 | struct in_addr ia = { .s_addr = ia6->s6_addr32[3] }; |
| 56 | in_print(buf4, sizeof(buf4), &ia); |
| 57 | return snprintf(buf, len, "::ffff:%s" , buf4); |
| 58 | } |
| 59 | |
| 60 | #define ADDC(c) do { \ |
| 61 | if (cp >= ecp) {\ |
| 62 | cp++; \ |
| 63 | } else \ |
| 64 | *cp++ = (char)(c); \ |
| 65 | } while (/*CONSTCOND*/0) |
| 66 | #define ADDX(v) do { \ |
| 67 | uint8_t n = hexdigits[(v)]; \ |
| 68 | ADDC(n); \ |
| 69 | if (cp == bp && n == '0') \ |
| 70 | cp--; \ |
| 71 | } while (/*CONSTCOND*/0) |
| 72 | |
| 73 | cp = buf; |
| 74 | ecp = buf + len; |
| 75 | a = (const uint16_t *)ia6; |
| 76 | for (i = 0; i < 8; i++) { |
| 77 | if (dcolon == 1) { |
| 78 | if (*a == 0) { |
| 79 | if (i == 7) |
| 80 | ADDC(':'); |
| 81 | a++; |
| 82 | continue; |
| 83 | } else |
| 84 | dcolon = 2; |
| 85 | } |
| 86 | if (*a == 0) { |
| 87 | if (dcolon == 0 && *(a + 1) == 0) { |
| 88 | if (i == 0) |
| 89 | ADDC(':'); |
| 90 | ADDC(':'); |
| 91 | dcolon = 1; |
| 92 | } else { |
| 93 | ADDC('0'); |
| 94 | ADDC(':'); |
| 95 | } |
| 96 | a++; |
| 97 | continue; |
| 98 | } |
| 99 | d = (const u_char *)a; |
| 100 | bp = cp + 1; |
| 101 | |
| 102 | ADDX((u_int)*d >> 4); |
| 103 | ADDX(*d & 0xf); |
| 104 | d++; |
| 105 | ADDX((u_int)*d >> 4); |
| 106 | ADDX(*d & 0xf); |
| 107 | ADDC(':'); |
| 108 | a++; |
| 109 | } |
| 110 | if (cp > buf) |
| 111 | --cp; |
| 112 | if (ecp > buf) { |
| 113 | if (cp < ecp) |
| 114 | *cp = '\0'; |
| 115 | else |
| 116 | *--ecp = '\0'; |
| 117 | } |
| 118 | return (int)(cp - buf); |
| 119 | } |
| 120 | |
| 121 | int |
| 122 | sin6_print(char *buf, size_t len, const void *v) |
| 123 | { |
| 124 | const struct sockaddr_in6 *sin6 = v; |
| 125 | const struct in6_addr *ia6 = &sin6->sin6_addr; |
| 126 | char abuf[INET6_ADDRSTRLEN]; |
| 127 | |
| 128 | if (!sin6->sin6_port) |
| 129 | return in6_print(buf, len, ia6); |
| 130 | in6_print(abuf, sizeof(abuf), ia6); |
| 131 | return snprintf(buf, len, "[%s]:%hu" , abuf, ntohs(sin6->sin6_port)); |
| 132 | } |
| 133 | |