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Diffstat (limited to 'src/include/lwip/apps/mdns_out.h')
| -rw-r--r-- | src/include/lwip/apps/mdns_out.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/src/include/lwip/apps/mdns_out.h b/src/include/lwip/apps/mdns_out.h new file mode 100644 index 00000000000..e6a7e3884b4 --- /dev/null +++ b/src/include/lwip/apps/mdns_out.h @@ -0,0 +1,138 @@ +/** + * @file + * MDNS responder - output related functionalities + */ + + /* + * Copyright (c) 2015 Verisure Innovation AB + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Erik Ekman <erik@kryo.se> + * Author: Jasper Verschueren <jasper.verschueren@apart-audio.com> + * + */ + +#ifndef LWIP_HDR_APPS_MDNS_OUT_H +#define LWIP_HDR_APPS_MDNS_OUT_H + +#include "lwip/apps/mdns_opts.h" +#include "lwip/apps/mdns_priv.h" +#include "lwip/netif.h" +#include "lwip/timeouts.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_MDNS_RESPONDER + +/** Bitmasks outmsg generation */ +/* Probe for ALL types with hostname */ +#define QUESTION_PROBE_HOST_ANY 0x10 +/* Probe for ALL types with service instance name */ +#define QUESTION_PROBE_SERVICE_NAME_ANY 0x10 + +/* Lookup from hostname -> IPv4 */ +#define REPLY_HOST_A 0x01 +/* Lookup from IPv4/v6 -> hostname */ +#define REPLY_HOST_PTR_V4 0x02 +/* Lookup from hostname -> IPv6 */ +#define REPLY_HOST_AAAA 0x04 +/* Lookup from hostname -> IPv6 */ +#define REPLY_HOST_PTR_V6 0x08 + +/* Lookup for service types */ +#define REPLY_SERVICE_TYPE_PTR 0x10 +/* Lookup for instances of service */ +#define REPLY_SERVICE_NAME_PTR 0x20 +/* Lookup for location of service instance */ +#define REPLY_SERVICE_SRV 0x40 +/* Lookup for text info on service instance */ +#define REPLY_SERVICE_TXT 0x80 + +/* RFC6762 section 6: + * To protect the network against excessive packet flooding due to software bugs + * or malicious attack, a Multicast DNS responder MUST NOT (except in the one + * special case of answering probe queries) multicast a record on a given + * interface until at least one second has elapsed since the last time that + * record was multicast on that particular interface. + */ +#define MDNS_MULTICAST_TIMEOUT 1000 + +/* RFC6762 section 6: + * In this special case only, when responding via multicast to a probe, a + * Multicast DNS responder is only required to delay its transmission as + * necessary to ensure an interval of at least 250 ms since the last time the + * record was multicast on that interface. + */ +#define MDNS_MULTICAST_PROBE_TIMEOUT 250 + +/* RFC6762 section 5.4: + * When receiving a question with the unicast-response bit set, a responder + * SHOULD usually respond with a unicast packet directed back to the querier. + * However, if the responder has not multicast that record recently (within one + * quarter of its TTL), then the responder SHOULD instead multicast the response + * so as to keep all the peer caches up to date, and to permit passive conflict + * detection. + * -> we implement a stripped down version. Depending on a timeout of 30s + * (25% of 120s) all QU questions are send via multicast or unicast. + */ +#define MDNS_MULTICAST_TIMEOUT_25TTL 30000 + +err_t mdns_create_outpacket(struct netif *netif, struct mdns_outmsg *msg, + struct mdns_outpacket *outpkt); +err_t mdns_send_outpacket(struct mdns_outmsg *msg, struct netif *netif); +void mdns_set_timeout(struct netif *netif, u32_t msecs, + sys_timeout_handler handler, u8_t *busy_flag); +#if LWIP_IPV4 +void mdns_multicast_timeout_reset_ipv4(void *arg); +void mdns_multicast_probe_timeout_reset_ipv4(void *arg); +void mdns_multicast_timeout_25ttl_reset_ipv4(void *arg); +void mdns_send_multicast_msg_delayed_ipv4(void *arg); +void mdns_send_unicast_msg_delayed_ipv4(void *arg); +void mdns_start_multicast_timeouts_ipv4(struct netif *netif); +#endif +#if LWIP_IPV6 +void mdns_multicast_timeout_reset_ipv6(void *arg); +void mdns_multicast_probe_timeout_reset_ipv6(void *arg); +void mdns_multicast_timeout_25ttl_reset_ipv6(void *arg); +void mdns_send_multicast_msg_delayed_ipv6(void *arg); +void mdns_send_unicast_msg_delayed_ipv6(void *arg); +void mdns_start_multicast_timeouts_ipv6(struct netif *netif); +#endif +void mdns_prepare_txtdata(struct mdns_service *service); +#ifdef LWIP_MDNS_SEARCH +err_t mdns_send_request(struct mdns_request *req, struct netif *netif, const ip_addr_t *destination); +#endif + +#endif /* LWIP_MDNS_RESPONDER */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_MDNS_OUT_H */ |