On 02/10/2017 11:40 AM, Rafał Miłecki wrote:
> From: Rafał Miłecki <[email protected]>
>
> Whenever we send A(AAA) records, let's also include reverse lookup ones.
> This should be extended in the future by adding IPv6.
Ping. Any opinions on this?
> @@ -210,6 +210,38 @@ dns_reply_a(struct interface *iface, int ttl)
> freeifaddrs(ifap);
> }
>
> +static void
> +dns_reply_rev_lookup(struct interface *iface, int ttl)
> +{
> + char name[32];
> + int len;
> +
> + if (!iface->v6) {
> + struct in_addr rev_v4_addr;
> +
> + /* PTR recored starts with IP with reversed octets order */
> + memcpy(&rev_v4_addr, &iface->v4_addr, sizeof(iface->v4_addr));
> + rev_v4_addr.s_addr = bswap_32(rev_v4_addr.s_addr);
Is there some more appropriate solution for this than bswap_32?
> +
> + /* Prepare name with reversed IP & second level domain suffix */
> + inet_ntop(AF_INET, &rev_v4_addr, name, sizeof(name));
> + strcat(name, ".in-addr.arpa");
> +
> + dns_init_answer();
> + len = dn_comp(mdns_hostname_local, mdns_buf, sizeof(mdns_buf),
NULL, NULL);
> + if (len > 0)
> + dns_add_answer(TYPE_PTR, mdns_buf, len, ttl);
> + dns_send_answer(iface, name);
> + }
> +}
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