+ return ret;
+}
+
+static void hexstring(char *s, size_t sl, const void *p, size_t pl) {
+ static const char hex[] = "0123456789abcdef";
+ int b = 0;
+ const uint8_t *k = p;
+
+ while (sl > 1 && pl > 0) {
+ *(s++) = hex[(b ? *k : *k >> 4) & 0xF];
+
+ if (b) {
+ k++;
+ pl--;
+ }
+
+ b = !b;
+
+ sl--;
+ }
+
+ if (sl > 0)
+ *s = 0;
+}
+
+int avahi_server_add_dns_server_address(
+ AvahiServer *s,
+ AvahiSEntryGroup *g,
+ AvahiIfIndex interface,
+ AvahiProtocol protocol,
+ AvahiPublishFlags flags,
+ const char *domain,
+ AvahiDNSServerType type,
+ const AvahiAddress *address,
+ uint16_t port /** should be 53 */) {
+
+ AvahiRecord *r;
+ int ret;
+ char n[64], h[64];
+
+ assert(s);
+ assert(address);
+
+ if (!AVAHI_IF_VALID(interface))
+ return avahi_server_set_errno(s, AVAHI_ERR_INVALID_INTERFACE);
+
+ if (!AVAHI_PROTO_VALID(protocol) || !AVAHI_PROTO_VALID(address->proto))
+ return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PROTOCOL);
+
+ if (!AVAHI_FLAGS_VALID(flags, 0) || (type != AVAHI_DNS_SERVER_UPDATE && type != AVAHI_DNS_SERVER_RESOLVE))
+ return avahi_server_set_errno(s, AVAHI_ERR_INVALID_FLAGS);
+
+ if (port == 0)
+ return avahi_server_set_errno(s, AVAHI_ERR_INVALID_PORT);
+
+ if (domain && !avahi_is_valid_domain_name(domain))
+ return avahi_server_set_errno(s, AVAHI_ERR_INVALID_DOMAIN_NAME);
+
+ if (!domain)
+ domain = s->domain_name;
+
+ if (address->proto == AVAHI_PROTO_INET) {
+ hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv4Address));
+ snprintf(n, sizeof(n), "ip-%s.%s", h, domain);
+ r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A, AVAHI_DEFAULT_TTL_HOST_NAME);
+ r->data.a.address = address->data.ipv4;
+ } else {
+ hexstring(h, sizeof(h), &address->data, sizeof(AvahiIPv6Address));
+ snprintf(n, sizeof(n), "ip6-%s.%s", h, domain);
+ r = avahi_record_new_full(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA, AVAHI_DEFAULT_TTL_HOST_NAME);
+ r->data.aaaa.address = address->data.ipv6;
+ }
+
+ if (!r)
+ return avahi_server_set_errno(s, AVAHI_ERR_NO_MEMORY);
+
+ ret = avahi_server_add(s, g, interface, protocol, AVAHI_PUBLISH_UNIQUE | AVAHI_PUBLISH_ALLOW_MULTIPLE, r);
+ avahi_record_unref(r);
+
+ if (ret < 0)
+ return ret;
+
+ return avahi_server_add_dns_server_name(s, g, interface, protocol, flags, domain, type, n, port);