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iris-legacy/iris/irisnet/jdns/jdns_mdnsd.h

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+/*
+ * 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