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query ip6.arpa then ip6.int for IPv6 reverse lookup. follows RFC3152.

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MFC after:	5 days
This commit is contained in:
ume 2002-10-26 19:00:14 +00:00
parent 65fb9af8bb
commit 46eab90645
1 changed files with 7 additions and 1 deletions
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8
lib/libc/net/gethostbydns.c
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@ -674,7 +674,7 @@ _dns_gethostbyaddr(void *rval, void *cb_data, va_list ap)
uaddr[n] & 0xf,
(uaddr[n] >> 4) & 0xf));
}
strcpy(qp, "ip6.int");
strlcat(qbuf, "ip6.arpa", sizeof(qbuf));
break;
default:
abort();
@ -684,6 +684,12 @@ _dns_gethostbyaddr(void *rval, void *cb_data, va_list ap)
return NS_NOTFOUND;
}
n = res_query(qbuf, C_IN, T_PTR, (u_char *)buf->buf, sizeof buf->buf);
if (n < 0 && af == AF_INET6) {
*qp = '\0';
strlcat(qbuf, "ip6.int", sizeof(qbuf));
n = res_query(qbuf, C_IN, T_PTR, (u_char *)buf->buf,
sizeof buf->buf);
}
if (n < 0) {
free(buf);
dprintf("res_query failed (%d)\n", n);