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Diffstat (limited to 'lib/libc/inet/inet_net_pton.c')
-rw-r--r--lib/libc/inet/inet_net_pton.c363
1 files changed, 105 insertions, 258 deletions
diff --git a/lib/libc/inet/inet_net_pton.c b/lib/libc/inet/inet_net_pton.c
index d566a0e1d3c3..14c88eb72014 100644
--- a/lib/libc/inet/inet_net_pton.c
+++ b/lib/libc/inet/inet_net_pton.c
@@ -1,20 +1,23 @@
-/*-
- * SPDX-License-Identifier: ISC
+/* $OpenBSD: inet_net_pton.c,v 1.14 2022/12/27 17:10:06 jmc Exp $ */
+
+/*
+ * Copyright (c) 2012 by Gilles Chehade <gilles@openbsd.org>
+ * Copyright (c) 1996,1999 by Internet Software Consortium.
*
- * Copyright (C) 2004, 2005, 2008 Internet Systems Consortium, Inc. ("ISC")
- * Copyright (C) 1996, 1998, 1999, 2001, 2003 Internet Software Consortium.
+ * SPDX-License-Identifier: ISC
*
- * Permission to use, copy, modify, and/or distribute this software for any
+ * 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.
+ * 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 "port_before.h"
@@ -22,7 +25,6 @@
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
-#include <arpa/nameser.h>
#include <arpa/inet.h>
#include <assert.h>
@@ -34,13 +36,37 @@
#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 *, u_char *, size_t);
+static int inet_net_pton_ipv6(const char *, u_char *, size_t);
-/*%
+/*
+ * 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(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);
+ }
+}
+
+/*
* static int
* inet_net_pton_ipv4(src, dst, size)
* convert IPv4 network number from presentation to network format.
@@ -57,22 +83,24 @@
* 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;
+inet_net_pton_ipv4(const char *src, u_char *dst, size_t size)
+{
+ static const char
+ xdigits[] = "0123456789abcdef",
+ digits[] = "0123456789";
+ int n, ch, tmp, dirty, bits;
const u_char *odst = dst;
- ch = *src++;
+ ch = (unsigned char)*src++;
if (ch == '0' && (src[0] == 'x' || src[0] == 'X')
- && isascii((unsigned char)(src[1]))
- && isxdigit((unsigned char)(src[1]))) {
+ && isascii((unsigned char)src[1]) && isxdigit((unsigned char)src[1])) {
/* Hexadecimal: Eat nybble string. */
- if (size <= 0U)
+ if (size == 0)
goto emsgsize;
- dirty = 0;
- src++; /*%< skip x or X. */
- while ((ch = *src++) != '\0' && isascii(ch) && isxdigit(ch)) {
+ tmp = 0, dirty = 0;
+ src++; /* skip x or X. */
+ while ((ch = (unsigned char)*src++) != '\0' &&
+ isascii(ch) && isxdigit(ch)) {
if (isupper(ch))
ch = tolower(ch);
n = strchr(xdigits, ch) - xdigits;
@@ -82,14 +110,14 @@ inet_net_pton_ipv4(const char *src, u_char *dst, size_t size) {
else
tmp = (tmp << 4) | n;
if (++dirty == 2) {
- if (size-- <= 0U)
+ if (size-- == 0)
goto emsgsize;
*dst++ = (u_char) tmp;
dirty = 0;
}
}
- if (dirty) { /*%< Odd trailing nybble? */
- if (size-- <= 0U)
+ if (dirty) { /* Odd trailing nybble? */
+ if (size-- == 0)
goto emsgsize;
*dst++ = (u_char) (tmp << 4);
}
@@ -104,16 +132,16 @@ inet_net_pton_ipv4(const char *src, u_char *dst, size_t size) {
tmp += n;
if (tmp > 255)
goto enoent;
- } while ((ch = *src++) != '\0' &&
+ } while ((ch = (unsigned char)*src++) != '\0' &&
isascii(ch) && isdigit(ch));
- if (size-- <= 0U)
+ if (size-- == 0)
goto emsgsize;
*dst++ = (u_char) tmp;
if (ch == '\0' || ch == '/')
break;
if (ch != '.')
goto enoent;
- ch = *src++;
+ ch = (unsigned char)*src++;
if (!isascii(ch) || !isdigit(ch))
goto enoent;
}
@@ -121,10 +149,10 @@ inet_net_pton_ipv4(const char *src, u_char *dst, size_t size) {
goto enoent;
bits = -1;
- if (ch == '/' && isascii((unsigned char)(src[0])) &&
- isdigit((unsigned char)(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 = (unsigned char)*src++; /* Skip over the /. */
bits = 0;
do {
n = strchr(digits, ch) - digits;
@@ -132,8 +160,9 @@ inet_net_pton_ipv4(const char *src, u_char *dst, size_t size) {
bits *= 10;
bits += n;
if (bits > 32)
- goto enoent;
- } while ((ch = *src++) != '\0' && isascii(ch) && isdigit(ch));
+ goto emsgsize;
+ } while ((ch = (unsigned char)*src++) != '\0' &&
+ isascii(ch) && isdigit(ch));
if (ch != '\0')
goto enoent;
}
@@ -147,29 +176,23 @@ inet_net_pton_ipv4(const char *src, u_char *dst, size_t size) {
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 = 8;
- else if (*odst >= 192) /*%< Class C */
+ else if (*odst >= 224) /* Class D */
+ bits = 4;
+ 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-- <= 0U)
+ if (size-- == 0)
goto emsgsize;
*dst++ = '\0';
}
@@ -184,222 +207,48 @@ inet_net_pton_ipv4(const char *src, u_char *dst, size_t size) {
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;
+inet_net_pton_ipv6(const char *src, u_char *dst, size_t size)
+{
+ struct in6_addr in6;
+ int ret;
+ int bits;
+ size_t bytes;
+ char buf[INET6_ADDRSTRLEN + sizeof("/128")];
+ char *sep;
+ const char *errstr;
- 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 (strlcpy(buf, src, sizeof buf) >= sizeof buf) {
+ errno = EMSGSIZE;
+ return (-1);
}
- 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;
+ sep = strchr(buf, '/');
+ if (sep != NULL)
+ *sep++ = '\0';
- 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;
+ ret = inet_pton(AF_INET6, buf, &in6);
+ if (ret != 1)
+ return (-1);
- 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)
+ if (sep == NULL)
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;
+ else {
+ bits = strtonum(sep, 0, 128, &errstr);
+ if (errstr) {
+ errno = EINVAL;
+ return (-1);
}
- 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;
+ if (bytes > size) {
+ errno = EMSGSIZE;
return (-1);
}
+ memcpy(dst, &in6.s6_addr, bytes);
+ return (bits);
}
/*
@@ -408,5 +257,3 @@ inet_net_pton(int af, const char *src, void *dst, size_t size) {
*/
#undef inet_net_pton
__weak_reference(__inet_net_pton, inet_net_pton);
-
-/*! \file */
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-19 22:01:32 +0000