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/*
* mDNS registration handler. This file is part of Shairport.
* Copyright (c) James Laird 2013
* All rights reserved.
*
* 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.
*/
#include "mdns.h"
#include "common.h"
#include "config.h"
#include <memory.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef CONFIG_AVAHI
extern mdns_backend mdns_avahi;
extern mdns_backend mdns_external_avahi;
#endif
#ifdef CONFIG_HAVE_DNS_SD_H
extern mdns_backend mdns_dns_sd;
extern mdns_backend mdns_external_dns_sd;
#endif
#ifdef CONFIG_TINYSVCMDNS
extern mdns_backend mdns_tinysvcmdns;
#endif
static mdns_backend *mdns_backends[] = {
#ifdef CONFIG_AVAHI
&mdns_avahi,
&mdns_external_avahi,
#endif
#ifdef CONFIG_HAVE_DNS_SD_H
&mdns_dns_sd,
&mdns_external_dns_sd,
#endif
#ifdef CONFIG_TINYSVCMDNS
&mdns_tinysvcmdns,
#endif
NULL};
void mdns_register(void) {
char *mdns_service_name = alloca(strlen(config.service_name) + 14);
char *p = mdns_service_name;
int i;
for (i = 0; i < 6; i++) {
snprintf(p, 3, "%02X", config.hw_addr[i]);
p += 2;
}
*p++ = '@';
strcpy(p, config.service_name);
mdns_backend **b = NULL;
if (config.mdns_name != NULL) {
for (b = mdns_backends; *b; b++) {
if (strcmp((*b)->name, config.mdns_name) != 0) // Not the one we are looking for
continue;
int error = (*b)->mdns_register(mdns_service_name, config.port);
if (error >= 0) {
config.mdns = *b;
}
break;
}
if (*b == NULL)
warn("%s mDNS backend not found");
} else {
for (b = mdns_backends; *b; b++) {
int error = (*b)->mdns_register(mdns_service_name, config.port);
if (error >= 0) {
config.mdns = *b;
break;
}
}
}
if (config.mdns == NULL)
die("Could not establish mDNS advertisement!");
}
void mdns_unregister(void) {
if (config.mdns) {
config.mdns->mdns_unregister();
}
}
void *mdns_dacp_monitor(char *dacp_id) {
void *reply = NULL;
if ((dacp_id != NULL) && (*dacp_id != '\0')) {
if ((config.mdns) && (config.mdns->mdns_dacp_monitor)) {
reply = config.mdns->mdns_dacp_monitor(dacp_id);
if (reply == NULL) {
debug(1, "Error starting a DACP monitor.");
}
} else
debug(3, "Can't start a DACP monitor -- none registered.");
}
return reply;
}
void mdns_dacp_dont_monitor(void *userdata) {
if ((config.mdns) && (config.mdns->mdns_dacp_dont_monitor)) {
config.mdns->mdns_dacp_dont_monitor(userdata);
} else
debug(3, "Can't stop a DACP monitor -- none registered.");
}
void mdns_ls_backends(void) {
mdns_backend **b = NULL;
printf("Available mDNS backends: \n");
for (b = mdns_backends; *b; b++) {
printf(" %s\n", (*b)->name);
}
}
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