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-rw-r--r--contrib/bind/lib/inet/inet_net_pton.c272
1 files changed, 228 insertions, 44 deletions
diff --git a/contrib/bind/lib/inet/inet_net_pton.c b/contrib/bind/lib/inet/inet_net_pton.c
index 4d265b2..ff62a8b 100644
--- a/contrib/bind/lib/inet/inet_net_pton.c
+++ b/contrib/bind/lib/inet/inet_net_pton.c
@@ -16,7 +16,7 @@
*/
#if defined(LIBC_SCCS) && !defined(lint)
-static const char rcsid[] = "$Id: inet_net_pton.c,v 1.11 1999/01/08 19:23:44 vixie Exp $";
+static const char rcsid[] = "$Id: inet_net_pton.c,v 1.13 2001/09/27 15:08:38 marka Exp $";
#endif
#include "port_before.h"
@@ -24,6 +24,7 @@ static const char rcsid[] = "$Id: inet_net_pton.c,v 1.11 1999/01/08 19:23:44 vix
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
+#include <arpa/nameser.h>
#include <arpa/inet.h>
#include <isc/assertions.h>
@@ -41,38 +42,6 @@ static const char rcsid[] = "$Id: inet_net_pton.c,v 1.11 1999/01/08 19:23:44 vix
# define SPRINTF(x) ((size_t)sprintf x)
#endif
-static int inet_net_pton_ipv4 __P((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)
@@ -90,20 +59,16 @@ inet_net_pton(af, src, dst, size)
* 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)
goto emsgsize;
@@ -158,7 +123,8 @@ inet_net_pton_ipv4(src, dst, size)
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 /. */
bits = 0;
@@ -213,3 +179,221 @@ inet_net_pton_ipv4(src, dst, size)
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);
+ }
+}
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