1177633Sdfr/* 2177633Sdfr * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 3177633Sdfr * Copyright (c) 1996,1999 by Internet Software Consortium. 4177633Sdfr * 5177633Sdfr * Permission to use, copy, modify, and distribute this software for any 6177633Sdfr * purpose with or without fee is hereby granted, provided that the above 7177633Sdfr * copyright notice and this permission notice appear in all copies. 8177633Sdfr * 9177633Sdfr * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 10177633Sdfr * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11177633Sdfr * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 12177633Sdfr * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13177633Sdfr * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14177633Sdfr * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 15177633Sdfr * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16177633Sdfr */ 17177633Sdfr 18177633Sdfr#if defined(LIBC_SCCS) && !defined(lint) 19177633Sdfrstatic const char rcsid[] = "$Id: inet_pton.c,v 1.3.18.2 2005/07/28 07:38:07 marka Exp $"; 20177633Sdfr#endif /* LIBC_SCCS and not lint */ 21177633Sdfr#include <sys/cdefs.h> 22177633Sdfr__FBSDID("$FreeBSD$"); 23177633Sdfr 24177633Sdfr#include <sys/param.h> 25177633Sdfr#include <sys/socket.h> 26177633Sdfr#include <sys/systm.h> 27177633Sdfr 28213103Sattilio#include <netinet/in.h> 29177633Sdfr 30177685Sdfr#if __FreeBSD_version < 700000 31177685Sdfr#define strchr index 32177685Sdfr#endif 33177685Sdfr 34177633Sdfr/*% 35177633Sdfr * WARNING: Don't even consider trying to compile this on a system where 36177633Sdfr * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX. 37177633Sdfr */ 38177633Sdfr 39177633Sdfrstatic int inet_pton4(const char *src, u_char *dst); 40177633Sdfrstatic int inet_pton6(const char *src, u_char *dst); 41177633Sdfr 42177633Sdfr/* int 43177633Sdfr * inet_pton(af, src, dst) 44177633Sdfr * convert from presentation format (which usually means ASCII printable) 45177633Sdfr * to network format (which is usually some kind of binary format). 46177633Sdfr * return: 47177633Sdfr * 1 if the address was valid for the specified address family 48177633Sdfr * 0 if the address wasn't valid (`dst' is untouched in this case) 49177633Sdfr * -1 if some other error occurred (`dst' is untouched in this case, too) 50177633Sdfr * author: 51177633Sdfr * Paul Vixie, 1996. 52177633Sdfr */ 53177633Sdfrint 54213103Sattilioinet_pton(int af, const char *src, void *dst) 55177633Sdfr{ 56177633Sdfr switch (af) { 57177633Sdfr case AF_INET: 58177633Sdfr return (inet_pton4(src, dst)); 59177633Sdfr case AF_INET6: 60177633Sdfr return (inet_pton6(src, dst)); 61177633Sdfr default: 62177633Sdfr return (-1); 63177633Sdfr } 64177633Sdfr /* NOTREACHED */ 65177633Sdfr} 66177633Sdfr 67177633Sdfr/* int 68177633Sdfr * inet_pton4(src, dst) 69177633Sdfr * like inet_aton() but without all the hexadecimal and shorthand. 70177633Sdfr * return: 71177633Sdfr * 1 if `src' is a valid dotted quad, else 0. 72177633Sdfr * notice: 73177633Sdfr * does not touch `dst' unless it's returning 1. 74177633Sdfr * author: 75177633Sdfr * Paul Vixie, 1996. 76177633Sdfr */ 77177633Sdfrstatic int 78177633Sdfrinet_pton4(const char *src, u_char *dst) 79177633Sdfr{ 80177633Sdfr static const char digits[] = "0123456789"; 81177633Sdfr int saw_digit, octets, ch; 82177633Sdfr#define NS_INADDRSZ 4 83177633Sdfr u_char tmp[NS_INADDRSZ], *tp; 84177633Sdfr 85177633Sdfr saw_digit = 0; 86177633Sdfr octets = 0; 87177633Sdfr *(tp = tmp) = 0; 88177633Sdfr while ((ch = *src++) != '\0') { 89177633Sdfr const char *pch; 90177633Sdfr 91177633Sdfr if ((pch = strchr(digits, ch)) != NULL) { 92177633Sdfr u_int new = *tp * 10 + (pch - digits); 93177633Sdfr 94177633Sdfr if (saw_digit && *tp == 0) 95177633Sdfr return (0); 96177633Sdfr if (new > 255) 97177633Sdfr return (0); 98177633Sdfr *tp = new; 99177633Sdfr if (!saw_digit) { 100177633Sdfr if (++octets > 4) 101177633Sdfr return (0); 102177633Sdfr saw_digit = 1; 103177633Sdfr } 104177633Sdfr } else if (ch == '.' && saw_digit) { 105177633Sdfr if (octets == 4) 106177633Sdfr return (0); 107177633Sdfr *++tp = 0; 108177633Sdfr saw_digit = 0; 109177633Sdfr } else 110177633Sdfr return (0); 111177633Sdfr } 112177633Sdfr if (octets < 4) 113177633Sdfr return (0); 114177633Sdfr memcpy(dst, tmp, NS_INADDRSZ); 115177633Sdfr return (1); 116177633Sdfr} 117177633Sdfr 118177633Sdfr/* int 119177633Sdfr * inet_pton6(src, dst) 120177633Sdfr * convert presentation level address to network order binary form. 121177633Sdfr * return: 122177633Sdfr * 1 if `src' is a valid [RFC1884 2.2] address, else 0. 123177633Sdfr * notice: 124177633Sdfr * (1) does not touch `dst' unless it's returning 1. 125177633Sdfr * (2) :: in a full address is silently ignored. 126177633Sdfr * credit: 127177633Sdfr * inspired by Mark Andrews. 128177633Sdfr * author: 129177633Sdfr * Paul Vixie, 1996. 130177633Sdfr */ 131177633Sdfrstatic int 132177633Sdfrinet_pton6(const char *src, u_char *dst) 133177633Sdfr{ 134177633Sdfr static const char xdigits_l[] = "0123456789abcdef", 135177633Sdfr xdigits_u[] = "0123456789ABCDEF"; 136177633Sdfr#define NS_IN6ADDRSZ 16 137177633Sdfr#define NS_INT16SZ 2 138177633Sdfr u_char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp; 139177633Sdfr const char *xdigits, *curtok; 140177633Sdfr int ch, seen_xdigits; 141177633Sdfr u_int val; 142177633Sdfr 143177633Sdfr memset((tp = tmp), '\0', NS_IN6ADDRSZ); 144177633Sdfr endp = tp + NS_IN6ADDRSZ; 145177633Sdfr colonp = NULL; 146177633Sdfr /* Leading :: requires some special handling. */ 147177633Sdfr if (*src == ':') 148177633Sdfr if (*++src != ':') 149177633Sdfr return (0); 150177633Sdfr curtok = src; 151177633Sdfr seen_xdigits = 0; 152177633Sdfr val = 0; 153177633Sdfr while ((ch = *src++) != '\0') { 154177633Sdfr const char *pch; 155177633Sdfr 156177633Sdfr if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL) 157177633Sdfr pch = strchr((xdigits = xdigits_u), ch); 158177633Sdfr if (pch != NULL) { 159177633Sdfr val <<= 4; 160177633Sdfr val |= (pch - xdigits); 161177633Sdfr if (++seen_xdigits > 4) 162177633Sdfr return (0); 163177633Sdfr continue; 164177633Sdfr } 165177633Sdfr if (ch == ':') { 166177633Sdfr curtok = src; 167177633Sdfr if (!seen_xdigits) { 168177633Sdfr if (colonp) 169177633Sdfr return (0); 170177633Sdfr colonp = tp; 171177633Sdfr continue; 172177633Sdfr } else if (*src == '\0') { 173177633Sdfr return (0); 174177633Sdfr } 175177633Sdfr if (tp + NS_INT16SZ > endp) 176177633Sdfr return (0); 177177633Sdfr *tp++ = (u_char) (val >> 8) & 0xff; 178177633Sdfr *tp++ = (u_char) val & 0xff; 179177633Sdfr seen_xdigits = 0; 180177633Sdfr val = 0; 181177633Sdfr continue; 182177633Sdfr } 183177633Sdfr if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) && 184177633Sdfr inet_pton4(curtok, tp) > 0) { 185177633Sdfr tp += NS_INADDRSZ; 186177633Sdfr seen_xdigits = 0; 187177633Sdfr break; /*%< '\\0' was seen by inet_pton4(). */ 188177633Sdfr } 189177633Sdfr return (0); 190177633Sdfr } 191177633Sdfr if (seen_xdigits) { 192177633Sdfr if (tp + NS_INT16SZ > endp) 193177633Sdfr return (0); 194177633Sdfr *tp++ = (u_char) (val >> 8) & 0xff; 195177633Sdfr *tp++ = (u_char) val & 0xff; 196177633Sdfr } 197177633Sdfr if (colonp != NULL) { 198177633Sdfr /* 199177633Sdfr * Since some memmove()'s erroneously fail to handle 200177633Sdfr * overlapping regions, we'll do the shift by hand. 201177633Sdfr */ 202177633Sdfr const int n = tp - colonp; 203177633Sdfr int i; 204177633Sdfr 205177633Sdfr if (tp == endp) 206177633Sdfr return (0); 207177633Sdfr for (i = 1; i <= n; i++) { 208177633Sdfr endp[- i] = colonp[n - i]; 209177633Sdfr colonp[n - i] = 0; 210177633Sdfr } 211177633Sdfr tp = endp; 212177633Sdfr } 213177633Sdfr if (tp != endp) 214177633Sdfr return (0); 215177633Sdfr memcpy(dst, tmp, NS_IN6ADDRSZ); 216177633Sdfr return (1); 217177633Sdfr} 218177633Sdfr 219177633Sdfr/*! \file */ 220