File indexing completed on 2024-05-19 04:06:37

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