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* Copyright (C) 2005 Jeremie Miller
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* Copyright (C) 2005,2006 Justin Karneges
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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unsigned long int tv_sec; /* seconds */
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unsigned long int tv_usec; /* microseconds */
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typedef struct mdnsd_struct *mdnsd; // main daemon data
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typedef struct mdnsdr_struct *mdnsdr; // record entry
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typedef struct mdnsda_struct
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unsigned short int type;
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unsigned long int ttl;
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unsigned long int real_ttl;
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unsigned short int rdlen;
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unsigned long int ip; // A
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unsigned char *rdname; // NS/CNAME/PTR/SRV
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struct { unsigned short int priority, weight, port; } srv; // SRV
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// create a new mdns daemon for the given class of names (usually 1) and maximum frame size
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mdnsd mdnsd_new(int class, int frame, int port, int (*time_now)(mdnsd d, void *arg), int (*rand_int)(mdnsd d, void *arg), void *arg);
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// gracefully shutdown the daemon, use mdnsd_out() to get the last packets
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void mdnsd_shutdown(mdnsd d);
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// flush all cached records (network/interface changed)
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void mdnsd_flush(mdnsd d);
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// free given mdnsd (should have used mdnsd_shutdown() first!)
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void mdnsd_free(mdnsd d);
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// incoming message from host (to be cached/processed)
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void mdnsd_in(mdnsd d, const jdns_packet_t *m, const jdns_response_t *resp, const jdns_address_t *addr, unsigned short int port);
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// outgoing messge to be delivered to host, returns >0 if one was returned and m/ip/port set
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int mdnsd_out(mdnsd d, jdns_packet_t **m, jdns_address_t **addr, unsigned short int *port);
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// returns the max wait-time until mdnsd_out() needs to be called again
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struct mytimeval *mdnsd_sleep(mdnsd d);
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// register a new query
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// answer(record, arg) is called whenever one is found/changes/expires (immediate or anytime after, mdnsda valid until ->ttl==0)
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// either answer returns -1, or another mdnsd_query with a NULL answer will remove/unregister this query
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void mdnsd_query(mdnsd d, char *host, int type, int (*answer)(mdnsda a, void *arg), void *arg);
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// returns the first (if last == NULL) or next answer after last from the cache
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// mdnsda only valid until an I/O function is called
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mdnsda mdnsd_list(mdnsd d, char *host, int type, mdnsda last);
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// Publishing functions
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// create a new unique record (try mdnsda_list first to make sure it's not used)
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// conflict(arg) called at any point when one is detected and unable to recover
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// after the first data is set_*(), any future changes effectively expire the old one and attempt to create a new unique record
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mdnsdr mdnsd_unique(mdnsd d, char *host, int type, long int ttl, void (*pubresult)(int result, char *host, int type, void *arg), void *arg);
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// create a new shared record
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mdnsdr mdnsd_shared(mdnsd d, char *host, int type, long int ttl);
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// de-list the given record
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void mdnsd_done(mdnsd d, mdnsdr r);
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// these all set/update the data for the given record, nothing is published until they are called
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void mdnsd_set_raw(mdnsd d, mdnsdr r, char *data, int len);
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void mdnsd_set_host(mdnsd d, mdnsdr r, char *name);
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void mdnsd_set_ip(mdnsd d, mdnsdr r, unsigned long int ip);
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void mdnsd_set_srv(mdnsd d, mdnsdr r, int priority, int weight, int port, char *name);