-/* Copyright (c) 1996 by Internet Software Consortium.
+/* Copyright (C) 1996-2019 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+/*
+ * 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
* SOFTWARE.
*/
-#if defined(LIBC_SCCS) && !defined(lint)
-static char rcsid[] = "$Id$";
-#endif /* LIBC_SCCS and not lint */
-
-#include <sys/param.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <ctype.h>
-#include <string.h>
#include <errno.h>
-#include <conf/portability.h>
+#include <netinet/in.h>
+#include <resolv/resolv-internal.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
-/*
- * 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, const char *src_end, u_char *dst);
+static int inet_pton6 (const char *src, const char *src_end, u_char *dst);
-static int inet_pton4 (const char *src, u_char *dst) internal_function;
-static int inet_pton6 (const char *src, u_char *dst) internal_function;
-
-/* int
- * inet_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(af, src, dst)
- int af;
- const char *src;
- void *dst;
+__inet_pton_length (int af, const char *src, size_t srclen, void *dst)
{
- switch (af) {
- case AF_INET:
- return (inet_pton4(src, dst));
- case AF_INET6:
- return (inet_pton6(src, dst));
- default:
- __set_errno (EAFNOSUPPORT);
- return (-1);
- }
- /* NOTREACHED */
+ switch (af)
+ {
+ case AF_INET:
+ return inet_pton4 (src, src + srclen, dst);
+ case AF_INET6:
+ return inet_pton6 (src, src + srclen, dst);
+ default:
+ __set_errno (EAFNOSUPPORT);
+ return -1;
+ }
}
+libc_hidden_def (__inet_pton_length)
-/* 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.
- */
+/* Like __inet_pton_length, but use strlen (SRC) as the length of
+ SRC. */
+int
+__inet_pton (int af, const char *src, void *dst)
+{
+ return __inet_pton_length (af, src, strlen (src), dst);
+}
+libc_hidden_def (__inet_pton)
+weak_alias (__inet_pton, inet_pton)
+libc_hidden_weak (inet_pton)
+
+/* Like inet_aton but without all the hexadecimal, octal and shorthand
+ (and trailing garbage is not ignored). Return 1 if SRC is a valid
+ dotted quad, else 0. This function does not touch DST unless it's
+ returning 1.
+ Author: Paul Vixie, 1996. */
static int
-internal_function
-inet_pton4(src, dst)
- const char *src;
- u_char *dst;
+inet_pton4 (const char *src, const char *end, unsigned char *dst)
{
- int saw_digit, octets, ch;
- u_char tmp[INADDRSZ], *tp;
-
- saw_digit = 0;
- octets = 0;
- *(tp = tmp) = 0;
- while ((ch = *src++) != '\0') {
-
- if (ch >= '0' && ch <= '9') {
- u_int new = *tp * 10 + (ch - '0');
-
- 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);
+ int saw_digit, octets, ch;
+ unsigned char tmp[NS_INADDRSZ], *tp;
+
+ saw_digit = 0;
+ octets = 0;
+ *(tp = tmp) = 0;
+ while (src < end)
+ {
+ ch = *src++;
+ if (ch >= '0' && ch <= '9')
+ {
+ unsigned int new = *tp * 10 + (ch - '0');
- memcpy(dst, tmp, INADDRSZ);
- return (1);
+ if (saw_digit && *tp == 0)
+ return 0;
+ 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.
- */
+/* Return the value of CH as a hexademical digit, or -1 if it is a
+ different type of character. */
+static int
+hex_digit_value (char ch)
+{
+ if ('0' <= ch && ch <= '9')
+ return ch - '0';
+ if ('a' <= ch && ch <= 'f')
+ return ch - 'a' + 10;
+ if ('A' <= ch && ch <= 'F')
+ return ch - 'A' + 10;
+ return -1;
+}
+
+/* Convert presentation-level IPv6 address to network order binary
+ form. Return 1 if SRC is a valid [RFC1884 2.2] address, else 0.
+ This function does not touch DST unless it's returning 1.
+ Author: Paul Vixie, 1996. Inspired by Mark Andrews. */
static int
-internal_function
-inet_pton6(src, dst)
- const char *src;
- u_char *dst;
+inet_pton6 (const char *src, const char *src_endp, unsigned char *dst)
{
- static const char xdigits[] = "0123456789abcdef";
- u_char tmp[IN6ADDRSZ], *tp, *endp, *colonp;
- const char *curtok;
- int ch, saw_xdigit;
- u_int val;
-
- tp = memset(tmp, '\0', IN6ADDRSZ);
- endp = tp + IN6ADDRSZ;
- colonp = NULL;
- /* Leading :: requires some special handling. */
- if (*src == ':')
- if (*++src != ':')
- return (0);
- curtok = src;
- saw_xdigit = 0;
- val = 0;
- while ((ch = tolower (*src++)) != '\0') {
- const char *pch;
-
- pch = strchr(xdigits, 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 + INT16SZ > endp)
- return (0);
- *tp++ = (u_char) (val >> 8) & 0xff;
- *tp++ = (u_char) val & 0xff;
- saw_xdigit = 0;
- val = 0;
- continue;
- }
- if (ch == '.' && ((tp + INADDRSZ) <= endp) &&
- inet_pton4(curtok, tp) > 0) {
- tp += INADDRSZ;
- saw_xdigit = 0;
- break; /* '\0' was seen by inet_pton4(). */
- }
- return (0);
+ unsigned char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
+ const char *curtok;
+ int ch;
+ size_t xdigits_seen; /* Number of hex digits since colon. */
+ unsigned int val;
+
+ tp = memset (tmp, '\0', NS_IN6ADDRSZ);
+ endp = tp + NS_IN6ADDRSZ;
+ colonp = NULL;
+
+ /* Leading :: requires some special handling. */
+ if (src == src_endp)
+ return 0;
+ if (*src == ':')
+ {
+ ++src;
+ if (src == src_endp || *src != ':')
+ return 0;
+ }
+
+ curtok = src;
+ xdigits_seen = 0;
+ val = 0;
+ while (src < src_endp)
+ {
+ ch = *src++;
+ int digit = hex_digit_value (ch);
+ if (digit >= 0)
+ {
+ if (xdigits_seen == 4)
+ return 0;
+ val <<= 4;
+ val |= digit;
+ if (val > 0xffff)
+ return 0;
+ ++xdigits_seen;
+ continue;
}
- if (saw_xdigit) {
- if (tp + INT16SZ > endp)
- return (0);
- *tp++ = (u_char) (val >> 8) & 0xff;
- *tp++ = (u_char) val & 0xff;
+ if (ch == ':')
+ {
+ curtok = src;
+ if (xdigits_seen == 0)
+ {
+ if (colonp)
+ return 0;
+ colonp = tp;
+ continue;
+ }
+ else if (src == src_endp)
+ return 0;
+ if (tp + NS_INT16SZ > endp)
+ return 0;
+ *tp++ = (unsigned char) (val >> 8) & 0xff;
+ *tp++ = (unsigned char) val & 0xff;
+ xdigits_seen = 0;
+ val = 0;
+ continue;
}
- 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 (ch == '.' && ((tp + NS_INADDRSZ) <= endp)
+ && inet_pton4 (curtok, src_endp, tp) > 0)
+ {
+ tp += NS_INADDRSZ;
+ xdigits_seen = 0;
+ break; /* '\0' was seen by inet_pton4. */
}
- if (tp != endp)
- return (0);
- memcpy(dst, tmp, IN6ADDRSZ);
- return (1);
+ return 0;
+ }
+ if (xdigits_seen > 0)
+ {
+ if (tp + NS_INT16SZ > endp)
+ return 0;
+ *tp++ = (unsigned char) (val >> 8) & 0xff;
+ *tp++ = (unsigned char) val & 0xff;
+ }
+ if (colonp != NULL)
+ {
+ /* Replace :: with zeros. */
+ if (tp == endp)
+ /* :: would expand to a zero-width field. */
+ return 0;
+ size_t n = tp - colonp;
+ memmove (endp - n, colonp, n);
+ memset (colonp, 0, endp - n - colonp);
+ tp = endp;
+ }
+ if (tp != endp)
+ return 0;
+ memcpy (dst, tmp, NS_IN6ADDRSZ);
+ return 1;
}
projects / thirdparty / glibc.git / blobdiff