[apple/libc.git] / net / FreeBSD / inet_net_pton.c

/*
 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
 * Copyright (c) 1996,1999 by 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 ISC DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC 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.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static const char rcsid[] = "$Id: inet_net_pton.c,v 1.7.18.2 2008/08/26 04:42:43 marka Exp $";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/inet/inet_net_pton.c,v 1.4 2008/12/14 19:39:53 ume Exp $");

#include "port_before.h"

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <arpa/inet.h>

#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#include "port_after.h"

#ifdef SPRINTF_CHAR
# define SPRINTF(x) strlen(sprintf/**/x)
#else
# define SPRINTF(x) ((size_t)sprintf x)
#endif

/*%
 * static int
 * inet_net_pton_ipv4(src, dst, size)
 *	convert IPv4 network number from presentation to network format.
 *	accepts hex octets, hex strings, decimal octets, and /CIDR.
 *	"size" is in bytes and describes "dst".
 * return:
 *	number of bits, either imputed classfully or specified with /CIDR,
 *	or -1 if some failure occurred (check errno).  ENOENT means it was
 *	not an IPv4 network specification.
 * note:
 *	network byte order assumed.  this means 192.5.5.240/28 has
 *	0b11110000 in its fourth octet.
 * author:
 *	Paul Vixie (ISC), June 1996
 */
static int
inet_net_pton_ipv4(const char *src, u_char *dst, size_t size) {
	static const char xdigits[] = "0123456789abcdef";
	static const char digits[] = "0123456789";
	int n, ch, tmp = 0, dirty, bits;
	const u_char *odst = dst;

	ch = *src++;
	if (ch == '0' && (src[0] == 'x' || src[0] == 'X')
	    && isascii((unsigned char)(src[1]))
	    && isxdigit((unsigned char)(src[1]))) {
		/* Hexadecimal: Eat nybble string. */
		if (size <= 0U)
			goto emsgsize;
		dirty = 0;
		src++;	/*%< skip x or X. */
		while ((ch = *src++) != '\0' && isascii(ch) && isxdigit(ch)) {
			if (isupper(ch))
				ch = tolower(ch);
			n = strchr(xdigits, ch) - xdigits;
			assert(n >= 0 && n <= 15);
			if (dirty == 0)
				tmp = n;
			else
				tmp = (tmp << 4) | n;
			if (++dirty == 2) {
				if (size-- <= 0U)
					goto emsgsize;
				*dst++ = (u_char) tmp;
				dirty = 0;
			}
		}
		if (dirty) {  /*%< Odd trailing nybble? */
			if (size-- <= 0U)
				goto emsgsize;
			*dst++ = (u_char) (tmp << 4);
		}
	} else if (isascii(ch) && isdigit(ch)) {
		/* Decimal: eat dotted digit string. */
		for (;;) {
			tmp = 0;
			do {
				n = strchr(digits, ch) - digits;
				assert(n >= 0 && n <= 9);
				tmp *= 10;
				tmp += n;
				if (tmp > 255)
					goto enoent;
			} while ((ch = *src++) != '\0' &&
				 isascii(ch) && isdigit(ch));
			if (size-- <= 0U)
				goto emsgsize;
			*dst++ = (u_char) tmp;
			if (ch == '\0' || ch == '/')
				break;
			if (ch != '.')
				goto enoent;
			ch = *src++;
			if (!isascii(ch) || !isdigit(ch))
				goto enoent;
		}
	} else
		goto enoent;

	bits = -1;
	if (ch == '/' && isascii((unsigned char)(src[0])) &&
	    isdigit((unsigned char)(src[0])) && dst > odst) {
		/* CIDR width specifier.  Nothing can follow it. */
		ch = *src++;	/*%< Skip over the /. */
		bits = 0;
		do {
			n = strchr(digits, ch) - digits;
			assert(n >= 0 && n <= 9);
			bits *= 10;
			bits += n;
			if (bits > 32)
				goto enoent;
		} while ((ch = *src++) != '\0' && isascii(ch) && isdigit(ch));
		if (ch != '\0')
			goto enoent;
	}

	/* Firey death and destruction unless we prefetched EOS. */
	if (ch != '\0')
		goto enoent;

	/* If nothing was written to the destination, we found no address. */
	if (dst == odst)
		goto enoent;
	/* If no CIDR spec was given, infer width from net class. */
	if (bits == -1) {
		if (*odst >= 240)	/*%< Class E */
			bits = 32;
		else if (*odst >= 224)	/*%< Class D */
			bits = 8;
		else if (*odst >= 192)	/*%< Class C */
			bits = 24;
		else if (*odst >= 128)	/*%< Class B */
			bits = 16;
		else			/*%< Class A */
			bits = 8;
		/* If imputed mask is narrower than specified octets, widen. */
		if (bits < ((dst - odst) * 8))
			bits = (dst - odst) * 8;
		/*
		 * If there are no additional bits specified for a class D
		 * address adjust bits to 4.
		 */
		if (bits == 8 && *odst == 224)
			bits = 4;
	}
	/* Extend network to cover the actual mask. */
	while (bits > ((dst - odst) * 8)) {
		if (size-- <= 0U)
			goto emsgsize;
		*dst++ = '\0';
	}
	return (bits);

 enoent:
	errno = ENOENT;
	return (-1);

 emsgsize:
	errno = EMSGSIZE;
	return (-1);
}

static int
getbits(const char *src, int *bitsp) {
	static const char digits[] = "0123456789";
	int n;
	int val;
	char ch;

	val = 0;
	n = 0;
	while ((ch = *src++) != '\0') {
		const char *pch;

		pch = strchr(digits, ch);
		if (pch != NULL) {
			if (n++ != 0 && val == 0)	/*%< no leading zeros */
				return (0);
			val *= 10;
			val += (pch - digits);
			if (val > 128)			/*%< range */
				return (0);
			continue;
		}
		return (0);
	}
	if (n == 0)
		return (0);
	*bitsp = val;
	return (1);
}

static int
getv4(const char *src, u_char *dst, int *bitsp) {
	static const char digits[] = "0123456789";
	u_char *odst = dst;
	int n;
	u_int val;
	char ch;

	val = 0;
	n = 0;
	while ((ch = *src++) != '\0') {
		const char *pch;

		pch = strchr(digits, ch);
		if (pch != NULL) {
			if (n++ != 0 && val == 0)	/*%< no leading zeros */
				return (0);
			val *= 10;
			val += (pch - digits);
			if (val > 255)			/*%< range */
				return (0);
			continue;
		}
		if (ch == '.' || ch == '/') {
			if (dst - odst > 3)		/*%< too many octets? */
				return (0);
			*dst++ = val;
			if (ch == '/')
				return (getbits(src, bitsp));
			val = 0;
			n = 0;
			continue;
		}
		return (0);
	}
	if (n == 0)
		return (0);
	if (dst - odst > 3)		/*%< too many octets? */
		return (0);
	*dst++ = val;
	return (1);
}

static int
inet_net_pton_ipv6(const char *src, u_char *dst, size_t size) {
	static const char xdigits_l[] = "0123456789abcdef",
			  xdigits_u[] = "0123456789ABCDEF";
	u_char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
	const char *xdigits, *curtok;
	int ch, saw_xdigit;
	u_int val;
	int digits;
	int bits;
	size_t bytes;
	int words;
	int ipv4;

	memset((tp = tmp), '\0', NS_IN6ADDRSZ);
	endp = tp + NS_IN6ADDRSZ;
	colonp = NULL;
	/* Leading :: requires some special handling. */
	if (*src == ':')
		if (*++src != ':')
			goto enoent;
	curtok = src;
	saw_xdigit = 0;
	val = 0;
	digits = 0;
	bits = -1;
	ipv4 = 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 (++digits > 4)
				goto enoent;
			saw_xdigit = 1;
			continue;
		}
		if (ch == ':') {
			curtok = src;
			if (!saw_xdigit) {
				if (colonp)
					goto enoent;
				colonp = tp;
				continue;
			} else if (*src == '\0')
				goto enoent;
			if (tp + NS_INT16SZ > endp)
				return (0);
			*tp++ = (u_char) (val >> 8) & 0xff;
			*tp++ = (u_char) val & 0xff;
			saw_xdigit = 0;
			digits = 0;
			val = 0;
			continue;
		}
		if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
		     getv4(curtok, tp, &bits) > 0) {
			tp += NS_INADDRSZ;
			saw_xdigit = 0;
			ipv4 = 1;
			break;	/*%< '\\0' was seen by inet_pton4(). */
		}
		if (ch == '/' && getbits(src, &bits) > 0)
			break;
		goto enoent;
	}
	if (saw_xdigit) {
		if (tp + NS_INT16SZ > endp)
			goto enoent;
		*tp++ = (u_char) (val >> 8) & 0xff;
		*tp++ = (u_char) val & 0xff;
	}
	if (bits == -1)
		bits = 128;

	words = (bits + 15) / 16;
	if (words < 2)
		words = 2;
	if (ipv4)
		words = 8;
	endp =  tmp + 2 * words;

	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;

		if (tp == endp)
			goto enoent;
		for (i = 1; i <= n; i++) {
			endp[- i] = colonp[n - i];
			colonp[n - i] = 0;
		}
		tp = endp;
	}
	if (tp != endp)
		goto enoent;

	bytes = (bits + 7) / 8;
	if (bytes > size)
		goto emsgsize;
	memcpy(dst, tmp, bytes);
	return (bits);

 enoent:
	errno = ENOENT;
	return (-1);

 emsgsize:
	errno = EMSGSIZE;
	return (-1);
}

/*%
 * int
 * inet_net_pton(af, src, dst, size)
 *	convert network number from presentation to network format.
 *	accepts hex octets, hex strings, decimal octets, and /CIDR.
 *	"size" is in bytes and describes "dst".
 * return:
 *	number of bits, either imputed classfully or specified with /CIDR,
 *	or -1 if some failure occurred (check errno).  ENOENT means it was
 *	not a valid network specification.
 * author:
 *	Paul Vixie (ISC), June 1996
 */
int
inet_net_pton(int af, const char *src, void *dst, size_t size) {
	switch (af) {
	case AF_INET:
		return (inet_net_pton_ipv4(src, dst, size));
	case AF_INET6:
		return (inet_net_pton_ipv6(src, dst, size));
	default:
		errno = EAFNOSUPPORT;
		return (-1);
	}
}

/*
 * Weak aliases for applications that use certain private entry points,
 * and fail to include <arpa/inet.h>.
 */
#undef inet_net_pton
__weak_reference(__inet_net_pton, inet_net_pton);

/*! \file */
Commit	Line	Data
9385eb3d	1	/*
b5d655f7 A	2	* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
b5d655f7 A	3	* Copyright (c) 1996,1999 by Internet Software Consortium.
9385eb3d A	4	*
	5	* Permission to use, copy, modify, and distribute this software for any
	6	* purpose with or without fee is hereby granted, provided that the above
	7	* copyright notice and this permission notice appear in all copies.
	8	*
b5d655f7 A	9	* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
	10	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	11	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
	12	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	13	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	14	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
	15	* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
9385eb3d A	16	*/
	17
	18	#if defined(LIBC_SCCS) && !defined(lint)
1f2f436a	19	static const char rcsid[] = "$Id: inet_net_pton.c,v 1.7.18.2 2008/08/26 04:42:43 marka Exp $";
9385eb3d A	20	#endif
9385eb3d A	21	#include <sys/cdefs.h>
1f2f436a	22	__FBSDID("$FreeBSD: src/lib/libc/inet/inet_net_pton.c,v 1.4 2008/12/14 19:39:53 ume Exp $");
b5d655f7 A	23
b5d655f7 A	24	#include "port_before.h"
9385eb3d A	25
	26	#include <sys/types.h>
	27	#include <sys/socket.h>
	28	#include <netinet/in.h>
b5d655f7	29	#include <arpa/nameser.h>
9385eb3d A	30	#include <arpa/inet.h>
	31
	32	#include <assert.h>
	33	#include <ctype.h>
	34	#include <errno.h>
	35	#include <stdio.h>
	36	#include <string.h>
	37	#include <stdlib.h>
	38
b5d655f7 A	39	#include "port_after.h"
b5d655f7 A	40
9385eb3d A	41	#ifdef SPRINTF_CHAR
	42	# define SPRINTF(x) strlen(sprintf/**/x)
	43	#else
	44	# define SPRINTF(x) ((size_t)sprintf x)
	45	#endif
	46
b5d655f7	47	/*%
9385eb3d A	48	* static int
	49	* inet_net_pton_ipv4(src, dst, size)
	50	* convert IPv4 network number from presentation to network format.
	51	* accepts hex octets, hex strings, decimal octets, and /CIDR.
	52	* "size" is in bytes and describes "dst".
	53	* return:
	54	* number of bits, either imputed classfully or specified with /CIDR,
	55	* or -1 if some failure occurred (check errno). ENOENT means it was
	56	* not an IPv4 network specification.
	57	* note:
	58	* network byte order assumed. this means 192.5.5.240/28 has
b5d655f7	59	* 0b11110000 in its fourth octet.
9385eb3d A	60	* author:
	61	* Paul Vixie (ISC), June 1996
	62	*/
	63	static int
b5d655f7 A	64	inet_net_pton_ipv4(const char src, u_char dst, size_t size) {
	65	static const char xdigits[] = "0123456789abcdef";
	66	static const char digits[] = "0123456789";
	67	int n, ch, tmp = 0, dirty, bits;
9385eb3d A	68	const u_char *odst = dst;
	69
	70	ch = *src++;
	71	if (ch == '0' && (src[0] == 'x' \|\| src[0] == 'X')
b5d655f7 A	72	&& isascii((unsigned char)(src[1]))
b5d655f7 A	73	&& isxdigit((unsigned char)(src[1]))) {
9385eb3d	74	/* Hexadecimal: Eat nybble string. */
b5d655f7	75	if (size <= 0U)
9385eb3d	76	goto emsgsize;
b5d655f7 A	77	dirty = 0;
	78	src++; /%< skip x or X. /
	79	while ((ch = *src++) != '\0' && isascii(ch) && isxdigit(ch)) {
9385eb3d A	80	if (isupper(ch))
	81	ch = tolower(ch);
	82	n = strchr(xdigits, ch) - xdigits;
	83	assert(n >= 0 && n <= 15);
b5d655f7 A	84	if (dirty == 0)
b5d655f7 A	85	tmp = n;
9385eb3d	86	else
b5d655f7 A	87	tmp = (tmp << 4) \| n;
	88	if (++dirty == 2) {
	89	if (size-- <= 0U)
	90	goto emsgsize;
	91	*dst++ = (u_char) tmp;
	92	dirty = 0;
	93	}
	94	}
	95	if (dirty) { /%< Odd trailing nybble? /
	96	if (size-- <= 0U)
9385eb3d	97	goto emsgsize;
b5d655f7	98	*dst++ = (u_char) (tmp << 4);
9385eb3d	99	}
9385eb3d A	100	} else if (isascii(ch) && isdigit(ch)) {
	101	/* Decimal: eat dotted digit string. */
	102	for (;;) {
	103	tmp = 0;
	104	do {
	105	n = strchr(digits, ch) - digits;
	106	assert(n >= 0 && n <= 9);
	107	tmp *= 10;
	108	tmp += n;
	109	if (tmp > 255)
	110	goto enoent;
	111	} while ((ch = *src++) != '\0' &&
	112	isascii(ch) && isdigit(ch));
b5d655f7	113	if (size-- <= 0U)
9385eb3d A	114	goto emsgsize;
	115	*dst++ = (u_char) tmp;
	116	if (ch == '\0' \|\| ch == '/')
	117	break;
	118	if (ch != '.')
	119	goto enoent;
	120	ch = *src++;
	121	if (!isascii(ch) \|\| !isdigit(ch))
	122	goto enoent;
	123	}
	124	} else
	125	goto enoent;
	126
	127	bits = -1;
b5d655f7 A	128	if (ch == '/' && isascii((unsigned char)(src[0])) &&
b5d655f7 A	129	isdigit((unsigned char)(src[0])) && dst > odst) {
9385eb3d	130	/* CIDR width specifier. Nothing can follow it. */
b5d655f7	131	ch = src++; /%< Skip over the /. */
9385eb3d A	132	bits = 0;
	133	do {
	134	n = strchr(digits, ch) - digits;
	135	assert(n >= 0 && n <= 9);
	136	bits *= 10;
	137	bits += n;
1f2f436a A	138	if (bits > 32)
1f2f436a A	139	goto enoent;
9385eb3d A	140	} while ((ch = *src++) != '\0' && isascii(ch) && isdigit(ch));
	141	if (ch != '\0')
	142	goto enoent;
9385eb3d A	143	}
	144
	145	/* Firey death and destruction unless we prefetched EOS. */
	146	if (ch != '\0')
	147	goto enoent;
	148
	149	/* If nothing was written to the destination, we found no address. */
	150	if (dst == odst)
	151	goto enoent;
	152	/* If no CIDR spec was given, infer width from net class. */
	153	if (bits == -1) {
b5d655f7	154	if (odst >= 240) /%< Class E */
9385eb3d	155	bits = 32;
b5d655f7 A	156	else if (odst >= 224) /%< Class D */
	157	bits = 8;
	158	else if (odst >= 192) /%< Class C */
9385eb3d	159	bits = 24;
b5d655f7	160	else if (odst >= 128) /%< Class B */
9385eb3d	161	bits = 16;
b5d655f7	162	else /%< Class A /
9385eb3d A	163	bits = 8;
9385eb3d A	164	/* If imputed mask is narrower than specified octets, widen. */
3d9156a7	165	if (bits < ((dst - odst) * 8))
9385eb3d	166	bits = (dst - odst) * 8;
b5d655f7 A	167	/*
	168	* If there are no additional bits specified for a class D
	169	* address adjust bits to 4.
	170	*/
	171	if (bits == 8 && *odst == 224)
	172	bits = 4;
9385eb3d A	173	}
	174	/* Extend network to cover the actual mask. */
	175	while (bits > ((dst - odst) * 8)) {
b5d655f7	176	if (size-- <= 0U)
9385eb3d A	177	goto emsgsize;
	178	*dst++ = '\0';
	179	}
	180	return (bits);
	181
	182	enoent:
	183	errno = ENOENT;
	184	return (-1);
	185
	186	emsgsize:
	187	errno = EMSGSIZE;
	188	return (-1);
	189	}
	190
b5d655f7 A	191	static int
	192	getbits(const char src, int bitsp) {
	193	static const char digits[] = "0123456789";
	194	int n;
	195	int val;
	196	char ch;
	197
	198	val = 0;
	199	n = 0;
	200	while ((ch = *src++) != '\0') {
	201	const char *pch;
	202
	203	pch = strchr(digits, ch);
	204	if (pch != NULL) {
	205	if (n++ != 0 && val == 0) /%< no leading zeros /
	206	return (0);
	207	val *= 10;
	208	val += (pch - digits);
	209	if (val > 128) /%< range /
	210	return (0);
	211	continue;
	212	}
	213	return (0);
	214	}
	215	if (n == 0)
	216	return (0);
	217	*bitsp = val;
	218	return (1);
	219	}
	220
	221	static int
	222	getv4(const char src, u_char dst, int *bitsp) {
	223	static const char digits[] = "0123456789";
	224	u_char *odst = dst;
	225	int n;
	226	u_int val;
	227	char ch;
	228
	229	val = 0;
	230	n = 0;
	231	while ((ch = *src++) != '\0') {
	232	const char *pch;
	233
	234	pch = strchr(digits, ch);
	235	if (pch != NULL) {
	236	if (n++ != 0 && val == 0) /%< no leading zeros /
	237	return (0);
	238	val *= 10;
	239	val += (pch - digits);
	240	if (val > 255) /%< range /
	241	return (0);
	242	continue;
	243	}
	244	if (ch == '.' \|\| ch == '/') {
	245	if (dst - odst > 3) /%< too many octets? /
	246	return (0);
	247	*dst++ = val;
	248	if (ch == '/')
	249	return (getbits(src, bitsp));
	250	val = 0;
	251	n = 0;
	252	continue;
	253	}
	254	return (0);
255	}
256	if (n == 0)
257	return (0);
258	if (dst - odst > 3) /%< too many octets? /
259	return (0);
260	*dst++ = val;
261	return (1);
262	}
263
264	static int
265	inet_net_pton_ipv6(const char src, u_char dst, size_t size) {
266	static const char xdigits_l[] = "0123456789abcdef",
267	xdigits_u[] = "0123456789ABCDEF";
268	u_char tmp[NS_IN6ADDRSZ], tp, endp, *colonp;
269	const char xdigits, curtok;
270	int ch, saw_xdigit;
271	u_int val;
272	int digits;
273	int bits;
274	size_t bytes;
275	int words;
276	int ipv4;
277
278	memset((tp = tmp), '\0', NS_IN6ADDRSZ);
279	endp = tp + NS_IN6ADDRSZ;
280	colonp = NULL;
281	/* Leading :: requires some special handling. */
282	if (*src == ':')
283	if (*++src != ':')
284	goto enoent;
285	curtok = src;
286	saw_xdigit = 0;
287	val = 0;
288	digits = 0;
289	bits = -1;
290	ipv4 = 0;
291	while ((ch = *src++) != '\0') {
292	const char *pch;
293
294	if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL)
295	pch = strchr((xdigits = xdigits_u), ch);
296	if (pch != NULL) {
297	val <<= 4;
298	val \|= (pch - xdigits);
299	if (++digits > 4)
300	goto enoent;
301	saw_xdigit = 1;
302	continue;
303	}
304	if (ch == ':') {
305	curtok = src;
306	if (!saw_xdigit) {
307	if (colonp)
308	goto enoent;
309	colonp = tp;
310	continue;
311	} else if (*src == '\0')
312	goto enoent;
313	if (tp + NS_INT16SZ > endp)
314	return (0);
315	*tp++ = (u_char) (val >> 8) & 0xff;
316	*tp++ = (u_char) val & 0xff;
317	saw_xdigit = 0;
318	digits = 0;
319	val = 0;
320	continue;
321	}
322	if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
323	getv4(curtok, tp, &bits) > 0) {
324	tp += NS_INADDRSZ;
325	saw_xdigit = 0;
326	ipv4 = 1;
327	break; /%< '\\0' was seen by inet_pton4(). /
328	}
329	if (ch == '/' && getbits(src, &bits) > 0)
330	break;
331	goto enoent;
332	}
333	if (saw_xdigit) {
334	if (tp + NS_INT16SZ > endp)
335	goto enoent;
336	*tp++ = (u_char) (val >> 8) & 0xff;
337	*tp++ = (u_char) val & 0xff;
338	}
339	if (bits == -1)
340	bits = 128;
341
342	words = (bits + 15) / 16;
343	if (words < 2)
344	words = 2;
345	if (ipv4)
346	words = 8;
347	endp = tmp + 2 * words;
348
349	if (colonp != NULL) {
350	/*
351	* Since some memmove()'s erroneously fail to handle
352	* overlapping regions, we'll do the shift by hand.
353	*/
354	const int n = tp - colonp;
355	int i;
356
357	if (tp == endp)
358	goto enoent;
359	for (i = 1; i <= n; i++) {
360	endp[- i] = colonp[n - i];
361	colonp[n - i] = 0;
362	}
363	tp = endp;
364	}
365	if (tp != endp)
366	goto enoent;
367
368	bytes = (bits + 7) / 8;
369	if (bytes > size)
370	goto emsgsize;
371	memcpy(dst, tmp, bytes);
372	return (bits);
373
374	enoent:
375	errno = ENOENT;
376	return (-1);
377
378	emsgsize:
379	errno = EMSGSIZE;
380	return (-1);
381	}
382
383	/*%
384	* int
385	* inet_net_pton(af, src, dst, size)
386	* convert network number from presentation to network format.
387	* accepts hex octets, hex strings, decimal octets, and /CIDR.
388	* "size" is in bytes and describes "dst".
389	* return:
390	* number of bits, either imputed classfully or specified with /CIDR,
391	* or -1 if some failure occurred (check errno). ENOENT means it was
392	* not a valid network specification.
393	* author:
394	* Paul Vixie (ISC), June 1996
395	*/
396	int
397	inet_net_pton(int af, const char src, void dst, size_t size) {
398	switch (af) {
399	case AF_INET:
400	return (inet_net_pton_ipv4(src, dst, size));
401	case AF_INET6:
402	return (inet_net_pton_ipv6(src, dst, size));
403	default:
404	errno = EAFNOSUPPORT;
405	return (-1);
406	}
407	}
408
9385eb3d A	409	/*
	410	* Weak aliases for applications that use certain private entry points,
	411	* and fail to include <arpa/inet.h>.
	412	*/
	413	#undef inet_net_pton
	414	__weak_reference(__inet_net_pton, inet_net_pton);
b5d655f7 A	415
b5d655f7 A	416	/! \file /