| /* |
| * 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 */ |
| } |
