aboutsummaryrefslogtreecommitdiff
path: root/resolv/inet_pton.c
diff options
context:
space:
mode:
Diffstat (limited to 'resolv/inet_pton.c')
-rw-r--r--resolv/inet_pton.c302
1 files changed, 153 insertions, 149 deletions
diff --git a/resolv/inet_pton.c b/resolv/inet_pton.c
index c0a7d54..68f0fa5 100644
--- a/resolv/inet_pton.c
+++ b/resolv/inet_pton.c
@@ -25,188 +25,192 @@
#include <string.h>
#include <errno.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, u_char *dst) internal_function;
-static int inet_pton6 (const char *src, u_char *dst) internal_function;
+static int inet_pton4 (const char *src, unsigned char *dst);
+static int inet_pton6 (const char *src, unsigned char *dst);
-/* 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).
+/* 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)
+ * 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.
+ * Paul Vixie, 1996.
*/
int
__inet_pton (int af, const char *src, 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, dst);
+ case AF_INET6:
+ return inet_pton6 (src, dst);
+ default:
+ __set_errno (EAFNOSUPPORT);
+ return -1;
+ }
}
libc_hidden_def (__inet_pton)
weak_alias (__inet_pton, inet_pton)
libc_hidden_weak (inet_pton)
-/* int
- * inet_pton4(src, dst)
- * like inet_aton() but without all the hexadecimal, octal (with the
- * exception of 0) and shorthand.
+/* Like inet_atonbut without all the hexadecimal, octal and shorthand.
+ *
* return:
- * 1 if `src' is a valid dotted quad, else 0.
+ * 1 if `src' is a valid dotted quad, else 0.
* notice:
- * does not touch `dst' unless it's returning 1.
+ * does not touch `dst' unless it's returning 1.
* author:
- * Paul Vixie, 1996.
+ * Paul Vixie, 1996.
*/
static int
-internal_function
-inet_pton4 (const char *src, u_char *dst)
+inet_pton4 (const char *src, unsigned char *dst)
{
- int saw_digit, octets, ch;
- u_char tmp[NS_INADDRSZ], *tp;
-
- saw_digit = 0;
- octets = 0;
- *(tp = tmp) = 0;
- while ((ch = *src++) != '\0') {
+ int saw_digit, octets, ch;
+ unsigned char tmp[NS_INADDRSZ], *tp;
- if (ch >= '0' && ch <= '9') {
- u_int new = *tp * 10 + (ch - '0');
+ saw_digit = 0;
+ octets = 0;
+ *(tp = tmp) = 0;
+ while ((ch = *src++) != '\0')
+ {
+ if (ch >= '0' && ch <= '9')
+ {
+ unsigned int new = *tp * 10 + (ch - '0');
- 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);
+ 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.
+/* Cconvert presentation level address to network order binary form.
+ *
* return:
- * 1 if `src' is a valid [RFC1884 2.2] address, else 0.
+ * 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.
+ * (1) does not touch `dst' unless it's returning 1.
+ * (2) :: in a full address is silently ignored.
* credit:
- * inspired by Mark Andrews.
+ * inspired by Mark Andrews.
* author:
- * Paul Vixie, 1996.
+ * Paul Vixie, 1996.
*/
static int
-internal_function
-inet_pton6 (const char *src, u_char *dst)
+inet_pton6 (const char *src, unsigned char *dst)
{
- static const char xdigits[] = "0123456789abcdef";
- u_char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
- const char *curtok;
- int ch, saw_xdigit;
- u_int val;
+ static const char xdigits[] = "0123456789abcdef";
+ unsigned char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
+ const char *curtok;
+ int ch, saw_xdigit;
+ unsigned int val;
- tp = memset(tmp, '\0', NS_IN6ADDRSZ);
- endp = tp + NS_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;
+ tp = memset (tmp, '\0', NS_IN6ADDRSZ);
+ endp = tp + NS_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;
- } else if (*src == '\0') {
- return (0);
- }
- if (tp + NS_INT16SZ > endp)
- return (0);
- *tp++ = (u_char) (val >> 8) & 0xff;
- *tp++ = (u_char) val & 0xff;
- saw_xdigit = 0;
- val = 0;
- continue;
- }
- if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
- inet_pton4(curtok, tp) > 0) {
- tp += NS_INADDRSZ;
- saw_xdigit = 0;
- break; /* '\0' was seen by inet_pton4(). */
- }
- return (0);
+ 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;
+ }
+ else if (*src == '\0')
+ {
+ return 0;
+ }
+ if (tp + NS_INT16SZ > endp)
+ return 0;
+ *tp++ = (unsigned char) (val >> 8) & 0xff;
+ *tp++ = (unsigned char) val & 0xff;
+ saw_xdigit = 0;
+ val = 0;
+ continue;
}
- if (saw_xdigit) {
- if (tp + NS_INT16SZ > endp)
- return (0);
- *tp++ = (u_char) (val >> 8) & 0xff;
- *tp++ = (u_char) val & 0xff;
+ if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
+ inet_pton4 (curtok, tp) > 0)
+ {
+ tp += NS_INADDRSZ;
+ saw_xdigit = 0;
+ break; /* '\0' was seen by inet_pton4. */
}
- 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;
+ return 0;
+ }
+ if (saw_xdigit)
+ {
+ if (tp + NS_INT16SZ > endp)
+ return 0;
+ *tp++ = (unsigned char) (val >> 8) & 0xff;
+ *tp++ = (unsigned char) val & 0xff;
+ }
+ 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)
- return (0);
- for (i = 1; i <= n; i++) {
- endp[- i] = colonp[n - i];
- colonp[n - i] = 0;
- }
- tp = endp;
+ if (tp == endp)
+ return 0;
+ for (i = 1; i <= n; i++)
+ {
+ endp[- i] = colonp[n - i];
+ colonp[n - i] = 0;
}
- if (tp != endp)
- return (0);
- memcpy(dst, tmp, NS_IN6ADDRSZ);
- return (1);
+ tp = endp;
+ }
+ if (tp != endp)
+ return 0;
+ memcpy (dst, tmp, NS_IN6ADDRSZ);
+ return 1;
}
generated by cgit v1.1 at 2024-11-28 07:10:00 +0000