| /* | |
| * Copyright (C) 1996-2001 Internet Software Consortium. | |
| * | |
| * Permission to use, copy, modify, and distribute this software for any | |
| * purpose with or without fee is hereby granted, provided that the above | |
| * copyright notice and this permission notice appear in all copies. | |
| * | |
| * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM | |
| * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL | |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL | |
| * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, | |
| * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING | |
| * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, | |
| * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION | |
| * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| */ | |
| #include <errno.h> | |
| #include <sys/types.h> | |
| #include <sys/socket.h> | |
| #include <netinet/in.h> | |
| #include <arpa/inet.h> | |
| #include <stdio.h> | |
| #include <string.h> | |
| #ifndef NS_INT16SZ | |
| #define NS_INT16SZ 2 | |
| #endif | |
| #ifndef NS_INADDRSZ | |
| #define NS_INADDRSZ 4 | |
| #endif | |
| #ifndef NS_IN6ADDRSZ | |
| #define NS_IN6ADDRSZ 16 | |
| #endif | |
| /* | |
| * WARNING: Don't even consider trying to compile this on a system where | |
| * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX. | |
| */ | |
| static int inet_pton4(const char *src, unsigned char *dst); | |
| static int inet_pton6(const char *src, unsigned char *dst); | |
| /* int | |
| * inet_pton4(src, dst) | |
| * like inet_aton() but without all the hexadecimal and shorthand. | |
| * return: | |
| * 1 if `src' is a valid dotted quad, else 0. | |
| * notice: | |
| * does not touch `dst' unless it's returning 1. | |
| * author: | |
| * Paul Vixie, 1996. | |
| */ | |
| static int | |
| inet_pton4(const char *src, unsigned char *dst) | |
| { | |
| static const char digits[] = "0123456789"; | |
| int saw_digit, octets, ch; | |
| unsigned char tmp[NS_INADDRSZ], *tp; | |
| saw_digit = 0; | |
| octets = 0; | |
| *(tp = tmp) = 0; | |
| while ((ch = *src++) != '\0') { | |
| const char *pch; | |
| if ((pch = strchr(digits, ch)) != NULL) { | |
| unsigned int new = *tp * 10 + (pch - digits); | |
| if (new > 255) | |
| return (0); | |
| *tp = new; | |
| if (! saw_digit) { | |
| if (++octets > 4) | |
| return (0); | |
| saw_digit = 1; | |
| } | |
| } else if (ch == '.' && saw_digit) { | |
| if (octets == 4) | |
| return (0); | |
| *++tp = 0; | |
| saw_digit = 0; | |
| } else | |
| return (0); | |
| } | |
| if (octets < 4) | |
| return (0); | |
| memcpy(dst, tmp, NS_INADDRSZ); | |
| return (1); | |
| } | |
| /* int | |
| * inet_pton6(src, dst) | |
| * convert presentation level address to network order binary form. | |
| * return: | |
| * 1 if `src' is a valid [RFC1884 2.2] address, else 0. | |
| * notice: | |
| * (1) does not touch `dst' unless it's returning 1. | |
| * (2) :: in a full address is silently ignored. | |
| * credit: | |
| * inspired by Mark Andrews. | |
| * author: | |
| * Paul Vixie, 1996. | |
| */ | |
| #ifndef NO_IPV6 | |
| static int | |
| inet_pton6(const char *src, unsigned char *dst) | |
| { | |
| static const char xdigits_l[] = "0123456789abcdef", | |
| xdigits_u[] = "0123456789ABCDEF"; | |
| unsigned char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp; | |
| const char *xdigits, *curtok; | |
| int ch, saw_xdigit; | |
| unsigned int val; | |
| memset((tp = tmp), '\0', NS_IN6ADDRSZ); | |
| endp = tp + NS_IN6ADDRSZ; | |
| colonp = NULL; | |
| /* Leading :: requires some special handling. */ | |
| if (*src == ':') | |
| if (*++src != ':') | |
| return (0); | |
| curtok = src; | |
| saw_xdigit = 0; | |
| val = 0; | |
| while ((ch = *src++) != '\0') { | |
| const char *pch; | |
| if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL) | |
| pch = strchr((xdigits = xdigits_u), ch); | |
| if (pch != NULL) { | |
| val <<= 4; | |
| val |= (pch - xdigits); | |
| if (val > 0xffff) | |
| return (0); | |
| saw_xdigit = 1; | |
| continue; | |
| } | |
| if (ch == ':') { | |
| curtok = src; | |
| if (!saw_xdigit) { | |
| if (colonp) | |
| return (0); | |
| colonp = tp; | |
| continue; | |
| } | |
| if (tp + NS_INT16SZ > endp) | |
| return (0); | |
| *tp++ = (unsigned char) (val >> 8) & 0xff; | |
| *tp++ = (unsigned char) val & 0xff; | |
| saw_xdigit = 0; | |
| val = 0; | |
| continue; | |
| } | |
| if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) && | |
| inet_pton4(curtok, tp) > 0) { | |
| tp += NS_INADDRSZ; | |
| saw_xdigit = 0; | |
| break; /* '\0' was seen by inet_pton4(). */ | |
| } | |
| return (0); | |
| } | |
| if (saw_xdigit) { | |
| if (tp + NS_INT16SZ > endp) | |
| return (0); | |
| *tp++ = (unsigned char) (val >> 8) & 0xff; | |
| *tp++ = (unsigned char) val & 0xff; | |
| } | |
| if (colonp != NULL) { | |
| /* | |
| * Since some memmove()'s erroneously fail to handle | |
| * overlapping regions, we'll do the shift by hand. | |
| */ | |
| const int n = tp - colonp; | |
| int i; | |
| for (i = 1; i <= n; i++) { | |
| endp[- i] = colonp[n - i]; | |
| colonp[n - i] = 0; | |
| } | |
| tp = endp; | |
| } | |
| if (tp != endp) | |
| return (0); | |
| memcpy(dst, tmp, NS_IN6ADDRSZ); | |
| return (1); | |
| } | |
| #endif | |
| /* int | |
| * isc_net_pton(af, src, dst) | |
| * convert from presentation format (which usually means ASCII printable) | |
| * to network format (which is usually some kind of binary format). | |
| * return: | |
| * 1 if the address was valid for the specified address family | |
| * 0 if the address wasn't valid (`dst' is untouched in this case) | |
| * -1 if some other error occurred (`dst' is untouched in this case, too) | |
| * author: | |
| * Paul Vixie, 1996. | |
| */ | |
| int | |
| inet_pton(int af, const char *src, void *dst) | |
| { | |
| switch (af) { | |
| case AF_INET: | |
| return (inet_pton4(src, dst)); | |
| #ifndef NO_IPV6 | |
| case AF_INET6: | |
| return (inet_pton6(src, dst)); | |
| #endif | |
| default: | |
| errno = EAFNOSUPPORT; | |
| return (-1); | |
| } | |
| /* NOTREACHED */ | |
| } |