-/*
- * 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, 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).
- * 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.
- */
-static int
-my_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:
- errno = EAFNOSUPPORT;
- return -1;
- }
- /* NOTREACHED */
-}
-
-/* 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.
- */
-static int
-inet_pton4(const char *src, unsigned char *dst)
-{
- static const char digits[] = "0123456789";
- int saw_digit, octets, ch;
- unsigned char tmp[INADDRSZ], *tp;
-
- saw_digit = 0;
- octets = 0;
- *(tp = tmp) = 0;
- while ((ch = *src++) != '\0') {
- const char *pch;
-
- if ((pch = strchr(digits, ch)) != NULL) {
- unsigned int new = *tp * 10 + (pch - digits);
-
- if (new > 255)
- return 0;
- if (! saw_digit) {
- if (++octets > 4)
- return 0;
- saw_digit = 1;
- }
- *tp = (unsigned char)new;
- } 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, 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.
- */
-static int
-inet_pton6(const char *src, unsigned char *dst)
-{
- static const char xdigits_l[] = "0123456789abcdef",
- xdigits_u[] = "0123456789ABCDEF";
- unsigned char tmp[IN6ADDRSZ], *tp = 0, *endp = 0, *colonp = 0;
- const char *xdigits = 0, *curtok = 0;
- int ch = 0, saw_xdigit = 0, count_xdigit = 0;
- unsigned int val = 0;
- unsigned dbloct_count = 0;
-
- memset((tp = tmp), '\0', IN6ADDRSZ);
- endp = tp + IN6ADDRSZ;
- colonp = NULL;
- /* Leading :: requires some special handling. */
- if (*src == ':')
- if (*++src != ':')
- return 0;
- curtok = src;
- saw_xdigit = count_xdigit = 0;
- val = 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) {
- if (count_xdigit >= 4)
- return 0;
- val <<= 4;
- val |= (pch - xdigits);
- if (val > 0xffff)
- return 0;
- saw_xdigit = 1;
- count_xdigit++;
- continue;
- }
- if (ch == ':') {
- curtok = src;
- if (!saw_xdigit) {
- if (colonp)
- return 0;
- colonp = tp;
- continue;
- } else if (*src == '\0') {
- return 0;
- }
- if (tp + sizeof(int16_t) > endp)
- return 0;
- *tp++ = (unsigned char) ((val >> 8) & 0xff);
- *tp++ = (unsigned char) (val & 0xff);
- saw_xdigit = 0;
- count_xdigit = 0;
- val = 0;
- dbloct_count++;
- continue;
- }
- if (ch == '.' && ((tp + INADDRSZ) <= endp) &&
- inet_pton4(curtok, tp) > 0) {
- tp += INADDRSZ;
- saw_xdigit = 0;
- dbloct_count += 2;
- break; /* '\0' was seen by inet_pton4(). */
- }
- return 0;
- }
- if (saw_xdigit) {
- if (tp + sizeof(int16_t) > endp)
- return 0;
- *tp++ = (unsigned char) ((val >> 8) & 0xff);
- *tp++ = (unsigned char) (val & 0xff);
- dbloct_count++;
- }
- if (colonp != NULL) {
- /* if we already have 8 double octets, having a colon means error */
- if (dbloct_count == 8)
- return 0;
-
- /*
- * 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 (tp != endp)
- return 0;
- memcpy(dst, tmp, IN6ADDRSZ);
- return 1;
-}
-
git.droids-corp.org / dpdk.git / commitdiff