155682Smarkm/* 2233294Sstas * Copyright (c) 1999 - 2001 Kungliga Tekniska H��gskolan 355682Smarkm * (Royal Institute of Technology, Stockholm, Sweden). 455682Smarkm * All rights reserved. 5233294Sstas * 655682Smarkm * Redistribution and use in source and binary forms, with or without 755682Smarkm * modification, are permitted provided that the following conditions 855682Smarkm * are met: 9233294Sstas * 1055682Smarkm * 1. Redistributions of source code must retain the above copyright 1155682Smarkm * notice, this list of conditions and the following disclaimer. 12233294Sstas * 1355682Smarkm * 2. Redistributions in binary form must reproduce the above copyright 1455682Smarkm * notice, this list of conditions and the following disclaimer in the 1555682Smarkm * documentation and/or other materials provided with the distribution. 16233294Sstas * 1755682Smarkm * 3. Neither the name of the Institute nor the names of its contributors 1855682Smarkm * may be used to endorse or promote products derived from this software 1955682Smarkm * without specific prior written permission. 20233294Sstas * 2155682Smarkm * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 2255682Smarkm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2355682Smarkm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2455682Smarkm * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 2555682Smarkm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2655682Smarkm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2755682Smarkm * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2855682Smarkm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2955682Smarkm * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3055682Smarkm * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3155682Smarkm * SUCH DAMAGE. 3255682Smarkm */ 3355682Smarkm 3455682Smarkm#include <config.h> 3555682Smarkm 36178825Sdfr#include "roken.h" 3755682Smarkm 3855682Smarkm/* 3955682Smarkm * 4055682Smarkm */ 4155682Smarkm 4255682Smarkmstatic const char * 4355682Smarkminet_ntop_v4 (const void *src, char *dst, size_t size) 4455682Smarkm{ 4555682Smarkm const char digits[] = "0123456789"; 4655682Smarkm int i; 4755682Smarkm struct in_addr *addr = (struct in_addr *)src; 4855682Smarkm u_long a = ntohl(addr->s_addr); 4955682Smarkm const char *orig_dst = dst; 5055682Smarkm 5155682Smarkm if (size < INET_ADDRSTRLEN) { 5255682Smarkm errno = ENOSPC; 5355682Smarkm return NULL; 5455682Smarkm } 5555682Smarkm for (i = 0; i < 4; ++i) { 5655682Smarkm int n = (a >> (24 - i * 8)) & 0xFF; 5755682Smarkm int non_zerop = 0; 5855682Smarkm 5955682Smarkm if (non_zerop || n / 100 > 0) { 6055682Smarkm *dst++ = digits[n / 100]; 6155682Smarkm n %= 100; 6255682Smarkm non_zerop = 1; 6355682Smarkm } 6455682Smarkm if (non_zerop || n / 10 > 0) { 6555682Smarkm *dst++ = digits[n / 10]; 6655682Smarkm n %= 10; 6755682Smarkm non_zerop = 1; 6855682Smarkm } 6955682Smarkm *dst++ = digits[n]; 7055682Smarkm if (i != 3) 7155682Smarkm *dst++ = '.'; 7255682Smarkm } 7355682Smarkm *dst++ = '\0'; 7455682Smarkm return orig_dst; 7555682Smarkm} 7655682Smarkm 7755682Smarkm#ifdef HAVE_IPV6 7855682Smarkmstatic const char * 7955682Smarkminet_ntop_v6 (const void *src, char *dst, size_t size) 8055682Smarkm{ 8155682Smarkm const char xdigits[] = "0123456789abcdef"; 8255682Smarkm int i; 8355682Smarkm const struct in6_addr *addr = (struct in6_addr *)src; 8455682Smarkm const u_char *ptr = addr->s6_addr; 8555682Smarkm const char *orig_dst = dst; 86233294Sstas int compressed = 0; 8755682Smarkm 8855682Smarkm if (size < INET6_ADDRSTRLEN) { 8955682Smarkm errno = ENOSPC; 9055682Smarkm return NULL; 9155682Smarkm } 9255682Smarkm for (i = 0; i < 8; ++i) { 9378527Sassar int non_zerop = 0; 9455682Smarkm 95233294Sstas if (compressed == 0 && 96233294Sstas ptr[0] == 0 && ptr[1] == 0 && 97233294Sstas i <= 5 && 98233294Sstas ptr[2] == 0 && ptr[3] == 0 && 99233294Sstas ptr[4] == 0 && ptr[5] == 0) { 100233294Sstas 101233294Sstas compressed = 1; 102233294Sstas 103233294Sstas if (i == 0) 104233294Sstas *dst++ = ':'; 105233294Sstas *dst++ = ':'; 106233294Sstas 107233294Sstas for (ptr += 6, i += 3; 108233294Sstas i < 8 && ptr[0] == 0 && ptr[1] == 0; 109233294Sstas ++i, ptr += 2); 110233294Sstas 111233294Sstas if (i >= 8) 112233294Sstas break; 113233294Sstas } 114233294Sstas 11555682Smarkm if (non_zerop || (ptr[0] >> 4)) { 11655682Smarkm *dst++ = xdigits[ptr[0] >> 4]; 11755682Smarkm non_zerop = 1; 11855682Smarkm } 11955682Smarkm if (non_zerop || (ptr[0] & 0x0F)) { 12055682Smarkm *dst++ = xdigits[ptr[0] & 0x0F]; 12155682Smarkm non_zerop = 1; 12255682Smarkm } 12355682Smarkm if (non_zerop || (ptr[1] >> 4)) { 12455682Smarkm *dst++ = xdigits[ptr[1] >> 4]; 12555682Smarkm non_zerop = 1; 12655682Smarkm } 12778527Sassar *dst++ = xdigits[ptr[1] & 0x0F]; 12855682Smarkm if (i != 7) 12955682Smarkm *dst++ = ':'; 13055682Smarkm ptr += 2; 13155682Smarkm } 13255682Smarkm *dst++ = '\0'; 13355682Smarkm return orig_dst; 13455682Smarkm} 13555682Smarkm#endif /* HAVE_IPV6 */ 13655682Smarkm 137233294SstasROKEN_LIB_FUNCTION const char * ROKEN_LIB_CALL 13855682Smarkminet_ntop(int af, const void *src, char *dst, size_t size) 13955682Smarkm{ 14055682Smarkm switch (af) { 14155682Smarkm case AF_INET : 14255682Smarkm return inet_ntop_v4 (src, dst, size); 14355682Smarkm#ifdef HAVE_IPV6 14455682Smarkm case AF_INET6 : 14555682Smarkm return inet_ntop_v6 (src, dst, size); 14655682Smarkm#endif 14755682Smarkm default : 14855682Smarkm errno = EAFNOSUPPORT; 14955682Smarkm return NULL; 15055682Smarkm } 15155682Smarkm} 152