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Diffstat (limited to 'src/include/lwip/apps/mdns.h')
| -rw-r--r-- | src/include/lwip/apps/mdns.h | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/src/include/lwip/apps/mdns.h b/src/include/lwip/apps/mdns.h new file mode 100644 index 00000000000..33da4a3e831 --- /dev/null +++ b/src/include/lwip/apps/mdns.h @@ -0,0 +1,154 @@ +/** + * @file + * MDNS responder + */ + + /* + * 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_H +#define LWIP_HDR_APPS_MDNS_H + +#include "lwip/apps/mdns_opts.h" +#include "lwip/netif.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#if LWIP_MDNS_RESPONDER + +enum mdns_sd_proto { + DNSSD_PROTO_UDP = 0, + DNSSD_PROTO_TCP = 1 +}; + +#define MDNS_PROBING_CONFLICT 0 +#define MDNS_PROBING_SUCCESSFUL 1 + +#define MDNS_LABEL_MAXLEN 63 +#define MDNS_DOMAIN_MAXLEN 256 + +struct mdns_host; +struct mdns_service; + +/* Domain structs */ +struct mdns_domain { + /* Encoded domain name */ + u8_t name[MDNS_DOMAIN_MAXLEN]; + /* Total length of domain name, including zero */ + u16_t length; + /* Set if compression of this domain is not allowed */ + u8_t skip_compression; +}; + +/** Domain, type and class. + * Shared between questions and answers */ +struct mdns_rr_info { + struct mdns_domain domain; + u16_t type; + u16_t klass; +}; + +struct mdns_answer { + struct mdns_rr_info info; + /** cache flush command bit */ + u16_t cache_flush; + /* Validity time in seconds */ + u32_t ttl; + /** Length of variable answer */ + u16_t rd_length; + /** Offset of start of variable answer in packet */ + u16_t rd_offset; +}; + +/** Callback function to add text to a reply, called when generating the reply */ +typedef void (*service_get_txt_fn_t)(struct mdns_service *service, void *txt_userdata); + +/** Callback function to let application know the result of probing network for name + * uniqueness, called with result MDNS_PROBING_SUCCESSFUL if no other node claimed + * use for the name for the netif or a service and is safe to use, or MDNS_PROBING_CONFLICT + * if another node is already using it and mdns is disabled on this interface */ +typedef void (*mdns_name_result_cb_t)(struct netif* netif, u8_t result, s8_t slot); + +void *mdns_get_service_txt_userdata(struct netif *netif, s8_t slot); + +void mdns_resp_init(void); + +void mdns_resp_register_name_result_cb(mdns_name_result_cb_t cb); + +err_t mdns_resp_add_netif(struct netif *netif, const char *hostname); +err_t mdns_resp_remove_netif(struct netif *netif); +err_t mdns_resp_rename_netif(struct netif *netif, const char *hostname); +int mdns_resp_netif_active(struct netif *netif); + +s8_t mdns_resp_add_service(struct netif *netif, const char *name, const char *service, enum mdns_sd_proto proto, u16_t port, service_get_txt_fn_t txt_fn, void *txt_userdata); +err_t mdns_resp_del_service(struct netif *netif, u8_t slot); +err_t mdns_resp_rename_service(struct netif *netif, u8_t slot, const char *name); + +err_t mdns_resp_add_service_txtitem(struct mdns_service *service, const char *txt, u8_t txt_len); + +void mdns_resp_restart_delay(struct netif *netif, uint32_t delay); +void mdns_resp_restart(struct netif *netif); +void mdns_resp_announce(struct netif *netif); + +/** + * @ingroup mdns + * Announce IP settings have changed on netif. + * Call this in your callback registered by netif_set_status_callback(). + * No need to call this function when LWIP_NETIF_EXT_STATUS_CALLBACK==1, + * this handled automatically for you. + * @param netif The network interface where settings have changed. + */ +#define mdns_resp_netif_settings_changed(netif) mdns_resp_announce(netif) + +#if LWIP_MDNS_SEARCH +typedef void (*search_result_fn_t)(struct mdns_answer *answer, const char *varpart, int varlen, int flags, void *arg); +/* flags bits, both can be set! */ +#define MDNS_SEARCH_RESULT_FIRST 1 /* First answer in received frame. */ +#define MDNS_SEARCH_RESULT_LAST 2 /* Last answer. */ + +err_t mdns_search_service(const char *name, const char *service, enum mdns_sd_proto proto, + struct netif *netif, search_result_fn_t result_fn, void *arg, + u8_t *request_id); +void mdns_search_stop(u8_t request_id); + +#endif /* LWIP_MDNS_SEARCH */ + +#endif /* LWIP_MDNS_RESPONDER */ + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_APPS_MDNS_H */ |