/*
- * Copyright (c) 1996 by Internet Software Consortium.
+ * 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 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.
+ * 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 orig_rcsid[] = "From Id: inet_net_pton.c,v 1.8 1996/11/21 10:28:12 vixie Exp $";
+static const char rcsid[] = "$Id: inet_net_pton.c,v 1.7.18.1 2005/04/27 05:00:53 sra Exp $";
#endif
#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/net/inet_net_pton.c,v 1.9 2003/09/15 23:38:06 fenner Exp $");
+__FBSDID("$FreeBSD: src/lib/libc/inet/inet_net_pton.c,v 1.3 2007/06/03 17:20:26 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 <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(const char *src, u_char *dst, size_t size);
-
-/*
- * static 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(af, src, dst, size)
- int af;
- const char *src;
- void *dst;
- size_t size;
-{
- switch (af) {
- case AF_INET:
- return (inet_net_pton_ipv4(src, dst, size));
- default:
- errno = EAFNOSUPPORT;
- return (-1);
- }
-}
-
-/*
+/*%
* static int
* inet_net_pton_ipv4(src, dst, size)
* convert IPv4 network number from presentation to network format.
* not an IPv4 network specification.
* note:
* network byte order assumed. this means 192.5.5.240/28 has
- * 0x11110000 in its fourth octet.
+ * 0b11110000 in its fourth octet.
* author:
* Paul Vixie (ISC), June 1996
*/
static int
-inet_net_pton_ipv4(src, dst, size)
- const char *src;
- u_char *dst;
- size_t size;
-{
- static const char
- xdigits[] = "0123456789abcdef",
- digits[] = "0123456789";
- int n, ch, tmp, dirty, bits;
+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(src[1]) && isxdigit(src[1])) {
+ && isascii((unsigned char)(src[1]))
+ && isxdigit((unsigned char)(src[1]))) {
/* Hexadecimal: Eat nybble string. */
- if (size <= 0)
+ if (size <= 0U)
goto emsgsize;
- *dst = 0, dirty = 0;
- src++; /* skip x or X. */
- while ((ch = *src++) != '\0' &&
- isascii(ch) && isxdigit(ch)) {
+ 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);
- *dst |= n;
- if (!dirty++)
- *dst <<= 4;
- else if (size-- > 0)
- *++dst = 0, dirty = 0;
+ 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);
}
- if (dirty)
- size--;
} else if (isascii(ch) && isdigit(ch)) {
/* Decimal: eat dotted digit string. */
for (;;) {
goto enoent;
} while ((ch = *src++) != '\0' &&
isascii(ch) && isdigit(ch));
- if (size-- <= 0)
+ if (size-- <= 0U)
goto emsgsize;
*dst++ = (u_char) tmp;
if (ch == '\0' || ch == '/')
goto enoent;
bits = -1;
- if (ch == '/' && isascii(src[0]) && isdigit(src[0]) && dst > odst) {
+ 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 /. */
+ ch = *src++; /*%< Skip over the /. */
bits = 0;
do {
n = strchr(digits, ch) - digits;
goto enoent;
/* If no CIDR spec was given, infer width from net class. */
if (bits == -1) {
- if (*odst >= 240) /* Class E */
+ if (*odst >= 240) /*%< Class E */
bits = 32;
- else if (*odst >= 224) /* Class D */
- bits = 4;
- else if (*odst >= 192) /* Class C */
+ else if (*odst >= 224) /*%< Class D */
+ bits = 8;
+ else if (*odst >= 192) /*%< Class C */
bits = 24;
- else if (*odst >= 128) /* Class B */
+ else if (*odst >= 128) /*%< Class B */
bits = 16;
- else /* Class A */
+ 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-- <= 0)
+ if (size-- <= 0U)
goto emsgsize;
*dst++ = '\0';
}
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 */
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